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CN108246368B - Thermal expansion self-coordination type main wind distributor - Google Patents

Thermal expansion self-coordination type main wind distributor Download PDF

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Publication number
CN108246368B
CN108246368B CN201611235868.5A CN201611235868A CN108246368B CN 108246368 B CN108246368 B CN 108246368B CN 201611235868 A CN201611235868 A CN 201611235868A CN 108246368 B CN108246368 B CN 108246368B
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radial
distribution pipe
thermal expansion
point
primary distribution
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CN108246368A (en
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程建民
赵艳
刘艳平
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Sinopec Engineering Inc
Sinopec Engineering Group Co Ltd
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Sinopec Engineering Inc
Sinopec Engineering Group Co Ltd
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J38/00—Regeneration or reactivation of catalysts, in general
    • B01J38/02—Heat treatment
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
    • C10G11/02—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils characterised by the catalyst used
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
    • C10G11/14—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils with preheated moving solid catalysts
    • C10G11/18—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils with preheated moving solid catalysts according to the "fluidised-bed" technique
    • C10G11/182—Regeneration
    • C—CHEMISTRY; METALLURGY
    • C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
    • C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
    • C10G11/00—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
    • C10G11/14—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils with preheated moving solid catalysts
    • C10G11/18—Catalytic cracking, in the absence of hydrogen, of hydrocarbon oils with preheated moving solid catalysts according to the "fluidised-bed" technique
    • C10G11/185—Energy recovery from regenerator effluent gases

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  • Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Engineering & Computer Science (AREA)
  • Organic Chemistry (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • General Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Materials Engineering (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

A thermal expansion self-coordinated main wind distributor comprises an air inlet bent pipe, a radial primary distribution pipe, a circumferential secondary distribution pipe, a central support piece, an end part support hinge, a radial support beam and a radial sliding block, wherein the end part support hinge is arranged along the circumferential direction of a regenerator, and one end of the end part support hinge is used for being fixed to the wall of the regenerator shell; the radial primary distribution pipe is arranged along the radial direction of the regenerator, the bottom of the radial primary distribution pipe is communicated with the air inlet bent pipe, and one end of the radial primary distribution pipe is inserted into the central supporting piece; the radial supporting beams are arranged along the radial direction of the regenerator and are alternately arranged with the radial primary distribution pipes along the circumferential direction of the regenerator, and two ends of each radial supporting beam are hinged with the central supporting piece and the end supporting hinge; the radial slide block is arranged on the radial support beam and slides along the radial support beam; the annular secondary distribution pipe is arranged along the circumferential direction of the regenerator, two ends of the annular secondary distribution pipe are connected with the radial primary distribution pipe and the radial sliding block, and the annular secondary distribution pipe is communicated with the radial primary distribution pipe. The invention realizes the release of thermal displacement, the elimination of thermal stress and the limitation of vibration by introducing a thermal expansion self-coordination type supporting structure.

Description

Thermal expansion self-coordination type main wind distributor
Technical Field
The invention relates to the field of catalytic cracking regeneration equipment, in particular to a thermal expansion self-coordinated main air distributor for a regenerator.
Background
To meet stringent environmental requirements and the growing demand for olefins in the marketplace, catalytic cracking (FCC) process technology is constantly being developed and improved. The regenerator is an important component of the catalytic cracking unit, and the long-period stable operation of the main air distributor directly determines the regeneration effect of the catalyst, and even the treatment capacity and the operation period of the whole unit of the catalytic cracking unit. The good regeneration effect can ensure the activity of the catalyst, improve the yield of light oil and reduce the unit consumption of the catalyst. The regeneration process in the regenerator is a typical gas-solid coke burning reaction, and the regeneration temperature is about 680-700 ℃. Along with the rise of temperature, each part of the main wind distributor generates thermal expansion, when thermal expansion deformation cannot be coordinated, components such as the air inlet pipe and the gas distribution pipe generate great thermal stress, and because the main wind distributor is positioned in a catalyst bed layer, the irregular stirring of the bed layer can cause the vibration of the main wind distributor during burning, if the vibration is not limited, the main wind distributor is damaged, the long-period operation of the device is threatened, the device is forced to stop, huge economic loss is caused, and the safe operation of the regenerator is endangered. Therefore, there is a need to develop a thermal expansion self-coordinated main wind distributor.
The information disclosed in this background section is only for enhancement of understanding of the general background of the invention and should not be taken as an acknowledgement or any form of suggestion that this information forms the prior art already known to a person skilled in the art.
Disclosure of Invention
The invention provides a thermal expansion self-coordinated main wind distributor for a regenerator, which comprises an air inlet bent pipe, a radial primary distribution pipe, a circumferential secondary distribution pipe, a central supporting piece, an end supporting hinge, a radial supporting beam and a radial sliding block, wherein: the end support hinge is arranged along the circumference of the regenerator, and one end of the end support hinge is used for being fixed to the shell wall of the regenerator; the radial primary distribution pipe is arranged along the radial direction of the regenerator, the bottom of the radial primary distribution pipe is communicated with the air inlet bent pipe, and one end of the radial primary distribution pipe is inserted into the central support piece; the radial support beams are arranged along the radial direction of the regenerator, the radial support beams and the radial primary distribution pipes are alternately arranged along the circumferential direction of the regenerator, and two ends of each radial support beam are respectively hinged to the central support piece and the end support hinge; the radial sliding block is arranged on the radial supporting beam and can slide along the radial supporting beam; the annular secondary distribution pipe is arranged along the circumferential direction of the regenerator, and two ends of the annular secondary distribution pipe are respectively connected to the radial primary distribution pipe and the radial sliding block, wherein the annular secondary distribution pipe is communicated with the radial primary distribution pipe and is spliced with the radial sliding block.
Preferably, said central support comprises a multi-branch support sleeve in which said radial primary distribution pipes are inserted, said radial support beams being hinged to said central support.
Preferably, the length of each branch support casing of the multi-branch support casing satisfies the following formula:
L0+|△RA|+|△RB|+|△R9|<L9<X2 (7)
wherein L is9Indicates the length of each branch support sleeve, L0Represents the length of insertion of the insertion end, Δ R, into the multi-branch supporting sleeve, set at the end of the radial primary distribution pipe at normal temperatureAThe radial thermal expansion quantity, Delta R, of the air inlet bent pipe with the intersection point A of the air inlet bent pipe and the shell wall of the regenerator as a base point when the thermal expansion self-coordinated main air distributor worksBThe radial thermal expansion quantity and the delta R of the radial primary distribution pipe with the intersection point B of the radial primary distribution pipe and the air inlet bent pipe as a base point are expressed when the thermal expansion self-coordinated main wind distributor works9Represents the thermal expansion amount X of the central supporting piece along the length direction of the central supporting piece by taking the central point D of the central supporting piece as a base point when the thermal expansion self-coordinated main wind distributor works2Represents the distance between the end of the radial primary distribution pipe and the central point D of the central support at normal temperature.
Preferably, the width of the radial slider satisfies the following formula:
Figure BDA0001195332510000021
wherein L is6Representing half the width of the radial slider,
Figure BDA0001195332510000022
the self-coordinated type main wind distributor with thermal expansion is represented by taking the intersection point A as a base point, and taking the intersection point A and the annular second stageConnection of end points C of the distribution pipe
Figure BDA0001195332510000031
Component of thermal expansion amount in the width direction of the radial slider at point C, L4Represents the length of the insertion end of the annular secondary distribution pipe inserted into the radial slide block at normal temperature, X6τThe distance between the end point C and the center of the radial slider at normal temperature is represented.
Preferably, the radial support beam is provided with a limiting part, and the limiting part is arranged on two sides of the radial sliding block along the length direction of the radial sliding block and used for limiting the sliding range of the radial sliding block.
Preferably, the distance X between the limiting part and the radial sliding block6rThe following formula is satisfied:
Figure BDA0001195332510000032
wherein, Δ R6Represents the radial displacement of the radial supporting beam relative to the position of the radial sliding block under normal temperature when the thermal expansion self-coordinated main wind distributor works,
Figure BDA0001195332510000033
the line which takes the point A of the intersecting point as a base point and connects the point A of the intersecting point with the end point C of the annular secondary distribution pipe when the thermal expansion self-coordination type main wind distributor works
Figure BDA0001195332510000034
The component of the amount of thermal expansion at the end point C along the length of the radial slider.
Preferably, the radial primary distribution pipe and the circumferential secondary distribution pipe are disposed at the same height.
Preferably, the hinge length of the end support hinge is:
L7＝α1△T1L8/(α2△T2) (11)
wherein L is7Denotes the hinge length, a, of the end support hinge1Representing the coefficients of thermal expansion, alpha, of said radial primary and toroidal secondary distribution pipes2Representing the coefficient of thermal expansion, Δ T, of the end support hinge1Expressing the difference between the working temperature of the radial primary distribution pipe and the working temperature of the annular secondary distribution pipe and the normal temperature, delta T2Indicating the difference between the working temperature of the end support hinge and the ambient temperature, L8The positioning heights of the radial primary distribution pipe and the circumferential secondary distribution pipe relative to the intersection point A of the inlet elbow and the wall of the regenerator are shown.
Preferably, said radial primary distribution tubes are evenly distributed around said central support.
Preferably, the annular secondary distribution pipes are uniformly arranged between the radial primary distribution pipe and the radial sliding block along the radial direction of the regenerator.
The thermal expansion self-coordinated main wind distributor provided by the invention realizes the purposes of releasing thermal displacement, eliminating thermal stress and limiting vibration by introducing the thermal expansion self-coordinated supporting structure comprising the central supporting piece, the radial sliding block structure and the end part supporting hinge structure.
The method and apparatus of the present invention have other features and advantages which will be apparent from or are set forth in detail in the accompanying drawings and the following detailed description, which are incorporated herein, and which together serve to explain certain principles of the invention.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
FIG. 1 shows a front view of a thermally expanded self-coordinated prevailing wind distributor according to one embodiment of the present invention.
FIG. 2 illustrates a top view of a thermally expanded self-coordinated prevailing wind distributor according to one embodiment of the present invention.
FIG. 3 shows a schematic structural diagram of a radial slider according to one embodiment of the present invention.
FIG. 4 shows a schematic structural view of a center support according to one embodiment of the present invention.
FIG. 5 shows a schematic structural view of an end support hinge according to one embodiment of the present invention.
Fig. 6 shows a schematic view in direction E of fig. 5.
Fig. 7 shows a schematic view in the direction F of fig. 5.
FIG. 8 shows a schematic diagram of the vertical displacement of a thermally expanded self-coordinated prevailing wind distributor according to an embodiment of the present invention.
Reference numerals:
1. an air inlet bent pipe; 2. a radial primary distribution pipe; 3. a central support; 4. annular secondary distribution pipes; 5. a radial support beam; 6. a radial slider; 7. an end support hinge; 8. a circumferential nozzle; 9. a support sleeve; 10. and a limiting component.
Detailed Description
The invention will be described in more detail below with reference to the accompanying drawings. While the preferred embodiments of the present invention are shown in the drawings, it should be understood that the present invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
FIG. 1 illustrates a front view of a thermally expanding self-coordinated prevailing wind distributor according to one embodiment of the present invention.
FIG. 2 illustrates a top view of a thermally expanded self-coordinated prevailing wind distributor according to one embodiment of the present invention.
As shown in fig. 1 and 2, the thermal expansion self-coordinated main wind distributor according to the present invention comprises an air inlet elbow 1, a radial primary distribution pipe 2, a circumferential secondary distribution pipe 4, a central support 3, an end support hinge 7, a radial support beam 5 and a radial slider 6, wherein: an end support hinge 7 is arranged along the circumference of the regenerator, one end of which is used for fixing to the shell wall of the regenerator; the radial primary distribution pipe 2 is arranged along the radial direction of the regenerator, the bottom of the radial primary distribution pipe 2 is communicated with the air inlet bent pipe 1, and one end of the radial primary distribution pipe 2 is inserted into the central support piece 3; the radial support beams 5 are arranged along the radial direction of the regenerator, the radial support beams 5 and the radial primary distribution pipes 2 are alternately arranged along the circumferential direction of the regenerator, and two ends of each radial support beam 5 are respectively hinged to the central support member 3 and the end support hinge 7; the radial slide block 6 is arranged on the radial support beam 5 and can slide along the radial support beam 5; the annular secondary distribution pipe 4 is arranged along the circumferential direction of the regenerator, and two ends of the annular secondary distribution pipe are respectively connected to the radial primary distribution pipe 2 and the radial sliding block 6, wherein the annular secondary distribution pipe 4 is communicated with the radial primary distribution pipe 2 and is spliced with the radial sliding block 6.
This embodiment achieves the aims of releasing the thermal displacements, eliminating the thermal stresses and limiting the vibrations by introducing a thermally expanding self-coordinated support structure comprising a central support 3, radial sliders 6 and end support hinges 7.
In one example, the radial primary distribution pipe 2 and the circumferential secondary distribution pipe 4 are provided at the same height.
In one example, the radial primary distribution pipes 2 are evenly distributed around the central support 3.
In one example, the circumferential secondary distribution pipe 4 is uniformly arranged between the radial primary distribution pipe 2 and the radial slide 6 in the radial direction of the regenerator.
Specifically, the thermal expansion self-coordinated main air distributor is arranged in the regenerator, the radial primary distribution pipe 2 is arranged along the radial direction of the regenerator, the bottom of the radial primary distribution pipe 2 is communicated with the air inlet bent pipe 1, the other end of the air inlet bent pipe 1 is connected with a ventilation device (such as a blower), and one end of the radial primary distribution pipe 2 is inserted into the central support member 3 and is uniformly distributed around the central support member 3; the radial supporting beams 5 are arranged along the radial direction of the regenerator, the radial supporting beams 5 and the radial primary distribution pipes 2 are alternately arranged along the circumferential direction of the regenerator, and two ends of each radial supporting beam 5 are respectively hinged to the central supporting piece 3 and the end supporting hinge 7; the radial sliding blocks 6 are arranged on the radial supporting beams 5 and can slide along the radial supporting beams 5, and the radial sliding blocks 6 are used for coordinating the tangential and radial thermal expansion of the end parts of the annular secondary distribution pipes 4 and limiting the vibration of the end parts; the annular secondary distribution pipes 4 are arranged along the circumferential direction of the regenerator, a plurality of annular secondary distribution pipes 4 are concentrically arranged, two ends of each annular secondary distribution pipe are respectively connected to the radial primary distribution pipe 2 and the radial sliding block 6, the radial primary distribution pipes 2 and the annular secondary distribution pipes 4 are arranged at the same height, and the annular secondary distribution pipes 4 are communicated with the radial primary distribution pipes 2 and are spliced with the radial sliding blocks 6; the central support piece 3 can realize self-coordination of the radial thermal expansion amount of the air inlet bent pipe 1 and the radial primary distribution pipe 2 and slow down the existence of thermal stress; the end supporting hinge 7 is arranged along the circumferential direction of the regenerator, and one end of the end supporting hinge is used for being fixed to the shell wall of the regenerator and used for coordinating the axial and radial thermal displacement of the thermal expansion self-coordination type main wind distributor; a plurality of annular nozzles 8 are distributed on the radial primary distribution pipe 2 and the annular secondary distribution pipe 4. The number of groups of the air inlet bent pipe 1, the radial primary distribution pipe 2 and the annular secondary distribution pipe 4 can be properly adjusted according to the operating air volume and the pressure drop requirement of the thermal expansion self-coordinated main air distributor, so that the optimal air flow distribution state is achieved.
When the thermal expansion self-coordination type main air distributor works at high temperature, main air flow enters a radial primary distribution pipe 2 through an air inlet bent pipe 1, and primary distribution of the air flow along the radial direction and the circumferential direction of the regenerator is realized; the annular secondary distribution pipes 4 which are uniformly distributed along the axial length of the radial primary distribution pipe 2 convey the airflow in the radial primary distribution pipe 2 in an annular manner to form a circumferential air ring, so that the circumferential secondary distribution of the airflow along different radial positions of the regenerator is realized; under the action of the annular nozzles 8 on the two-stage distribution pipes, the airflow forms multi-angle injection along the outer walls of the radial primary distribution pipe 2 and the annular secondary distribution pipe 4, and the uniform distribution of the airflow on the whole section of the regenerator is realized.
In one example, the width of the radial slider 6 satisfies the following formula:
Figure BDA0001195332510000071
wherein L is6Representing half the width of the radial slider 6,
Figure BDA0001195332510000072
the line which represents the connection line of the intersecting point A as the base point and the end point C of the annular secondary distribution pipe 4 when the thermal expansion self-coordination type main wind distributor works
Figure BDA0001195332510000076
The component of the thermal expansion amount at the point C in the width direction of the radial slider 6, L4Represents the length of insertion of the insertion end, X, of the annular secondary distribution pipe 4 into the radial slider 6 at ambient temperature6τThe distance between the end point C and the center of the radial slider 6 at normal temperature is shown.
In one example, a plurality of limiting parts 10 are arranged on the radial supporting beam 5, and the limiting parts 10 are arranged on two sides of the radial sliding block 6 along the length direction of the radial sliding block 6 and used for limiting the sliding range of the radial sliding block 6.
In one example, the distance X between the stop member 10 and the radial slider 66rThe following formula is satisfied:
Figure BDA0001195332510000073
wherein, Δ R6Indicating the radial displacement of the radial support beam 5 with respect to the position of the radial slider 6 at normal temperature,
Figure BDA0001195332510000074
the end point C of the ring-direction secondary distribution pipe 4 is shown with point A as a base point,
Figure BDA0001195332510000075
the thermal expansion of the horizontal line at the end point C is a component in the longitudinal direction of the radial slider 6.
FIG. 3 shows a schematic structural diagram of a radial slider according to one embodiment of the present invention.
Specifically, as shown in fig. 3, one end of the circumferential secondary distribution pipe 4 is connected to the radial sliding block 6, and the circumferential secondary distribution pipe 4 expands when the thermal expansion self-coordinated main wind distributor operates at high temperatureThe end is freely stretched and contracted in the width direction of the radial sliding block 6, the expansion amount is released, and the radial sliding block 6 eliminates the thermal stress of the annular secondary distribution pipe 4 through sliding. The radial support beam 5 is provided with a plurality of limiting parts 10, and the limiting parts 10 are arranged on two sides of the radial sliding block 6 along the length direction of the radial sliding block 6 and used for limiting the sliding range of the radial sliding block 6. Therefore, according to the calculation of the formula (1) and the formula (2), the optimal width of the radial sliding block 6 and the optimal distance X between the limiting component 10 and the radial sliding block 6 are selected6rThe requirement of assembly size at normal temperature is met, incomplete release of radial thermal expansion in the high-temperature operation process is avoided, and thermal stress is eliminated to a greater extent.
When the thermal expansion self-coordinated main wind distributor works at high temperature, the vertical projection distance between the end point C and the point A of the annular secondary distribution pipe 4 can be obtained according to the shape, the material and the temperature of the annular secondary distribution pipe 4
Figure BDA0001195332510000081
Included angle beta and thermal expansion coefficient alpha with the width direction of the radial slide block 61Difference from temperature Delta T1Substituting formula (3):
Figure BDA0001195332510000082
to obtain
Figure BDA0001195332510000083
Amount of swelling
Figure BDA0001195332510000084
Substituting formula (4):
Figure BDA0001195332510000085
obtaining a vertical projection connecting line which takes the intersecting point A as a base point and the end point C of the annular secondary distribution pipe 4
Figure BDA0001195332510000086
Thermal expansion at point CComponent in the width direction of the radial slider 6
Figure BDA0001195332510000087
Length L for inserting the insertion end of the toroidal secondary distribution pipe 4 into the radial slider 64And the distance X between the end point C and the center of the radial slide 66τAnd substituting the optimal value range into the formula (1) to obtain the optimal value range of the width of the radial slide block 6.
When the thermal expansion self-coordination type main wind distributor works at high temperature, the distance between the center point of the radial slide block 6 and the center point D of the central support piece 3 can be obtained according to the position, the material and the temperature of the radial slide block 6 on the radial support beam 5
Figure BDA0001195332510000088
Coefficient of thermal expansion alpha2Difference from temperature Delta T2Substituting formula (5):
Figure BDA0001195332510000089
obtaining the radial displacement quantity DeltaR of the radial supporting beam 5 relative to the position of the radial sliding block 6 at normal temperature6Will be
Figure BDA0001195332510000091
Substituting the angle β into equation (6):
Figure BDA0001195332510000092
to obtain
Figure BDA0001195332510000093
Component of thermal expansion at point C in the longitudinal direction of the radial slider 6
Figure BDA0001195332510000094
It is reacted with DELTA R6And (3) substituting the formula (2) to obtain the optimal value range of the distance between the limiting component 10 and the radial slide block 6.
In one example, the central support 3 comprises a multi-branch supporting sleeve 9, the radial primary distribution pipes 2 being inserted in the multi-branch supporting sleeve 9, the radial supporting beams 5 being hinged to the central support 3.
In one example, the length of each branch support jacket of the multi-branch support jacket 9 satisfies the following formula:
L0+|△RA|+|△RB|+|△R9|<L9<X2 (7)
wherein L is9Indicates the length of each branch support sleeve, L0The length, Δ R, of the insertion end, set at the end of the radial primary distribution pipe 2, inserted into the multi-branch supporting sleeve 9 at normal temperatureAThe radial thermal expansion quantity, Delta R, of the air inlet bent pipe 1 with the intersection point A of the air inlet bent pipe and the shell wall of the regenerator as a base point when the thermal expansion self-coordinated main air distributor worksBThe radial thermal expansion quantity, Delta R, of the radial primary distribution pipe 2 with the intersection point B of the radial primary distribution pipe and the air inlet bent pipe 1 as a base point when the thermal expansion self-coordination type main wind distributor works9Represents the thermal expansion amount X of the central supporting piece 3 along the length direction of the central supporting piece 3 by taking the central point D of the central supporting piece as a base point when the thermal expansion self-coordinated main wind distributor works2Representing the distance between the end of the primary radial distribution pipe 2 and the centre point D of the central support 3 at normal temperature.
Fig. 4 shows a schematic structural view of the center support 3 according to an embodiment of the present invention.
Specifically, as shown in fig. 4, the central support 3 includes a multi-branch support sleeve 9, and the radial primary distribution pipes 2 are inserted into the multi-branch support sleeve 9, so that the multi-branch support sleeve 9 can relieve thermal stress of the radial primary distribution pipes 2 when the thermal expansion self-coordinated main wind distributor is operated at a high temperature. Therefore, the number of the branch sleeves can be determined according to the number of the radial primary distribution pipes 2, and the optimal length of the branch sleeve is selected according to the calculation of the formula (7), so that the requirement of the assembly size at normal temperature is met, incomplete release of radial thermal expansion in the high-temperature operation process is avoided, and thermal stress is eliminated to a greater extent.
When the thermal expansion self-coordination type main wind distributor works at high temperature, the air inlet pipe can be bent according to the shape of the air inlet bent pipe 1,The material and temperature are used to obtain the radial distance R between the thermal displacement release end and the base point AACoefficient of thermal expansion alpha1Difference from temperature Delta T1Substituting the formula (8) to obtain the radial thermal expansion quantity DeltaR of the inlet elbow 1 by taking the intersection point A of the inlet elbow and the shell wall of the regenerator as a base pointA：
△RA＝α1RA△T1 (8)。
When the thermal expansion self-coordination type main wind distributor works at high temperature, the radial distance R between the thermal displacement release end and the base point B can be obtained according to the shape, the material and the temperature of the radial primary distribution pipe 2BCoefficient of thermal expansion alpha1Difference from temperature Delta T1Substituting the formula (9) to obtain the radial thermal expansion amount Delta R of the radial primary distribution pipe 2 by taking the intersection point B of the radial primary distribution pipe and the air inlet bent pipe 1 as a base pointB：
△RB＝α1RB△T1 (9)。
The distance X between the end of the radial primary distribution pipe 2 at normal temperature and the central point D of the central support 32、α2And Δ T2Substituting equation (10):
△R9＝α2X2△T2 (10)，
the thermal expansion amount DeltaR of the central support 3 along the self length direction with the self central point D as a base point can be obtained by the formula (10)9The length L of insertion of the end of the radial primary distribution pipe 2 into the multi-branch support sleeve 90The distance X between the end of the radial primary distribution pipe 2 and the central point D of the central support 32And Δ RA、△RB、△R9Substituting into formula (7) to obtain the length L of each branch supporting casing9The optimum value range of (2).
In one example, the hinge length of the end support hinge 7 is:
L7＝α1△T1L8/(α2△T2) (11)
wherein L is7Showing the hinge length, alpha, of the end support hinge 71Denotes the coefficient of thermal expansion, α, of the radial primary distribution pipe 2 and the circumferential secondary distribution pipe 42Denotes the coefficient of thermal expansion, DeltaT, of the end support hinge 71The difference between the working temperature of the radial primary distribution pipe 2 and the working temperature of the circumferential secondary distribution pipe 4 and the normal temperature, Delta T2Represents the difference between the working temperature of the end support hinge 7 and the normal temperature, L8The positioning heights of the radial primary distribution pipe 2 and the circumferential secondary distribution pipe 4 with respect to the intersection point a are shown.
FIG. 5 shows a schematic structural view of an end support hinge according to one embodiment of the present invention.
Fig. 6 shows a schematic view in direction E of fig. 5.
Fig. 7 shows a schematic view in the direction F of fig. 5.
Specifically, as shown in fig. 5, 6 and 7, one end of the radial support beam 5 is connected to the end support hinge 7, and the end support hinge 7 can eliminate the radial thermal stress of the radial support beam 5 by rotation when the thermal expansion self-coordinated main wind distributor operates at high temperature. Since the self-aligned thermal expansion main wind distributor expands in the axially aligned upward direction during high temperature operation, the hinge length L of the end support hinge 7 can be calculated according to equation (11)7The free release of the maximum axial thermal displacement during high-temperature operation is ensured, and the radial supporting beam 5 is maintained to be in a horizontal state all the time.
When the thermal expansion self-coordinated main wind distributor works at high temperature, the positioning height L of the radial primary distribution pipe 2 and the annular secondary distribution pipe 4 relative to the intersection point A can be obtained according to the height, the material and the temperature of the radial primary distribution pipe 2 and the annular secondary distribution pipe 48Coefficient of thermal expansion alpha1Difference from temperature Delta T1The coefficient of thermal expansion α of the end support hinge 7 is obtained according to the material and temperature of the end support hinge 72Difference from temperature Delta T2Substituting into equation (11), the hinge length L of the end support hinge 7 is obtained7。
Application example
To facilitate understanding of the aspects of the embodiments of the present invention and their effects, a specific application example is given below. It will be understood by those skilled in the art that this example is merely for the purpose of facilitating an understanding of the present invention and that any specific details thereof are not intended to limit the invention in any way.
In an embodiment, the thermal expansion self-coordinated mainstream distributor is provided with 3 radial primary distribution pipes 2 and 3 radial support beams 5, as shown in fig. 1. The thermal expansion self-coordinated main air distributor is positioned in the regenerator, 3 radial primary distribution pipes 2 are uniformly arranged along the radial direction of the regenerator, the included angle between every two radial primary distribution pipes 2 is 120 degrees, the bottoms of the radial primary distribution pipes 2 are communicated with an air inlet bent pipe 1, the other end of the air inlet bent pipe 1 is connected with a ventilation device, and one end of each radial primary distribution pipe 2 is inserted into a central supporting piece 3 and uniformly distributed around the central supporting piece 3; 3 radial supporting beams 5 are arranged along the radial direction of the regenerator, the included angle between every 2 radial supporting beams 5 is 120 degrees, the 3 radial supporting beams 5 and the 3 radial primary distribution pipes 2 are alternately arranged along the circumferential direction of the regenerator, and two ends of each radial supporting beam 5 are respectively hinged to the central supporting piece 3 and the end supporting hinge 7; 12 radial sliding blocks 6 are arranged on 3 radial supporting beams 5, and 4 radial sliding blocks 6 are arranged on each radial supporting beam 5 and can slide along the radial supporting beams 5; the 4 circles of annular secondary distribution pipes 4 are concentrically arranged along the circumferential direction of the regenerator, two ends of each annular secondary distribution pipe are respectively connected to the radial primary distribution pipe 2 and the radial sliding block 6, the radial primary distribution pipes 2 are uniformly led out at equal intervals along the axial length of the radial primary distribution pipes, the radial primary distribution pipes 2 and the annular secondary distribution pipes 4 are arranged at the same height, and the annular secondary distribution pipes 4 are communicated with the radial primary distribution pipes 2; 3 end support hinges 7 are arranged along the circumference of the regenerator, one end for fixing to the shell wall of the regenerator; a plurality of annular nozzles 8 are distributed on the radial primary distribution pipe 2 and the annular secondary distribution pipe 4.
Wherein, the radial first-stage distribution pipe 2, the annular second-stage distribution pipe 4, the central support member 3, the radial support beam 5, the radial slide block 6 and the end support hinge 7 are made of S30408 materials. When the thermal expansion self-coordination type main wind distributor works at high temperature, the temperature of the radial primary distribution pipe 2 and the temperature of the annular secondary distribution pipe 4 are 350 ℃, and the temperature is delta T1The operating temperatures of the central support 3, the radial support beams 5, the radial slide blocks 6 and the end support hinges 7 are all 700 ℃ at 330 ℃, and delta T2＝680℃。S30408 coefficient of thermal expansion of the material: alpha at normal temperature to 350 DEG C1＝17.79x10-6(ii) a Alpha at normal temperature to 700 DEG C2＝18.97x10-6。
First, half L of the width of the radial slide 6 is determined6And the distance X between the limiting part 10 and the radial slide block 66rThe radial slider 6 at the end of the outermost ring toward the secondary distribution pipe 4 is taken as an example. When the thermal expansion self-coordination type main wind distributor works at high temperature, the radial distance from the thermal displacement release end to the base point A is obtained according to the shape of the annular secondary distribution pipe 4
Figure BDA0001195332510000121
Will be provided with
Figure BDA0001195332510000122
α1And Δ T1Substituting into the formula (3) to obtain
Figure BDA0001195332510000123
Will be provided with
Figure BDA0001195332510000124
Substituting the angle beta into the formula (4) to obtain a vertical projection connecting line which takes the intersection point A as a base point and the intersection point A and the end point C of the annular secondary distribution pipe 4
Figure BDA0001195332510000125
Component of thermal expansion amount at point C in the width direction of radial slider 6
Figure BDA0001195332510000126
Length L for inserting the insertion end of the toroidal secondary distribution pipe 4 into the radial slider 6450mm and the distance X between the end point C and the center of the radial slide 66τSubstituting equation (1) for 240mm, half L of the width of the radial slider 6 is obtained6The optimal value range of (A) is 75.6mm<L6<240mm, the optimal value range of the width of the radial slide block 6 is 151.2 mm-480 mm. According to the position of the radial slide block 6, the distance between the center point of the radial slide block 6 and the center point D of the central support 3 is obtained
Figure BDA0001195332510000131
Will be provided with
Figure BDA0001195332510000132
α2And Δ T2Substituting the formula (5) to obtain the radial displacement amount DeltaR of the radial supporting beam 5 relative to the position of the radial sliding block 6 at normal temperature665.7mm, will
Figure BDA0001195332510000133
Substituting the angle beta into the formula (6) to obtain
Figure BDA0001195332510000134
Component of thermal expansion at point C in the longitudinal direction of the radial slider 6
Figure BDA0001195332510000135
Will be Δ R6And
Figure BDA0001195332510000136
substituting the formula (2) to obtain the distance X between the limiting part 10 and the radial slide block 66rThe optimum value range of (A) is X6r>51.7mm。
FIG. 8 shows a schematic diagram of the vertical displacement of a thermally expanded self-coordinated prevailing wind distributor according to an embodiment of the present invention.
Determining the hinge length L of the end support hinge 77In the operation of the main wind distributor with self-coordinated thermal expansion, the radial supporting beams 5, the radial primary distribution pipes 2 and the circumferential secondary distribution pipes 4 are required to be kept horizontal, so that the positioning heights L of the radial primary distribution pipes 2 and the circumferential secondary distribution pipes 4 relative to the intersection point A8And L7The amount of thermal expansion in the vertical direction should be equal due to L8Temperature ratio L of ends7Low end, thermal expansion less than L7End, therefore, L8Greater than L7As shown in fig. 8. Wherein L is82348mm, mixing L8、α1、△T1、α2And Δ T2Substituting into equation (11), the hinge length of the end support hinge 7 is obtainedDegree L7＝1069mm。
Determining the length L of each branch support sleeve9When the thermal expansion self-coordination type main wind distributor works at high temperature, the radial distance R between the thermal displacement release end of the air inlet bent pipe 1 and the base point A is obtained according to the shape of the air inlet bent pipe 1A1957mm, mixing RA、α1And Δ T1Substituting the formula (8) to obtain the radial thermal expansion quantity DeltaR of the inlet elbow 1 by taking the intersection point A of the inlet elbow and the shell wall of the regenerator as a base pointA11.5 mm. According to the shape of the radial primary distribution pipe 2, the radial distance R between the thermal displacement release end and the base point B is obtainedB2828mm, and mixing RB、α1And Δ T1Substituting the formula (9) to obtain the radial thermal expansion amount Delta R of the radial primary distribution pipe 2 by taking the intersection point B of the radial primary distribution pipe and the air inlet bent pipe 1 as a base pointB16.6 mm. The distance X between the end of the radial primary distribution pipe 2 at normal temperature and the central point D of the central support 32＝565mm、α2And Δ T2Substituting into formula (10) to obtain Δ R9Length L of insertion end of primary radial distribution pipe 2 into multi-branch supporting sleeve 9, 7.3mm0＝287mm、X2And Δ RA、△RB、△R9Substituting into formula (7) to obtain the length L of each branch supporting casing9The optimal value range of the (B) is 322-565 mm.
When the thermal expansion self-coordination type main air distributor works at high temperature, main air flow enters a radial primary distribution pipe 2 through an air inlet bent pipe 1, and primary distribution of the air flow along the radial direction and the circumferential direction of the regenerator is realized; the annular secondary distribution pipes 4 which are uniformly distributed along the axial length of the radial primary distribution pipe 2 convey the airflow in the radial primary distribution pipe 2 in an annular manner to form a circumferential air ring, so that the circumferential secondary distribution of the airflow along different radial positions of the regenerator is realized; under the action of the annular nozzles 8 on the two-stage distribution pipes, the airflow forms multi-angle injection along the outer walls of the radial primary distribution pipe 2 and the annular secondary distribution pipe 4, and the uniform distribution of the airflow on the whole section of the regenerator is realized. Wherein, the radial primary distribution pipe 2 is inserted into a multi-branch supporting sleeve 9, and the multi-branch supporting sleeve 9 eliminates the thermal stress of the radial primary distribution pipe; one end of the annular secondary distribution pipe 4 is connected to the radial sliding block 6, the expansion end of the annular secondary distribution pipe 4 freely stretches in the width direction of the radial sliding block 6, the expansion amount is released, and the radial sliding block 6 eliminates the thermal stress of the annular secondary distribution pipe 4 through sliding; one end of the radial support beam 5 is connected to an end support hinge 7, and the end support hinge 7 eliminates thermal stress of the radial support beam 5 by rotation.
The invention realizes the purposes of releasing thermal displacement, eliminating thermal stress and limiting vibration by introducing a thermal expansion self-coordinated supporting structure comprising a central supporting piece 3, a radial sliding block 6 and an end supporting hinge 7.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments. The terminology used herein was chosen in order to best explain the principles of the embodiments, the practical application, or improvements made to the technology in the marketplace, or to enable others of ordinary skill in the art to understand the embodiments disclosed herein.

Claims (10)

1. A thermal expansion self-coordinated prevailing wind distributor for a regenerator comprising an air intake elbow, a radial primary distribution pipe, a circumferential secondary distribution pipe, a central support, an end support hinge, a radial support beam and a radial slider, wherein:
the end support hinge is arranged along the circumference of the regenerator, and one end of the end support hinge is used for being fixed to the shell wall of the regenerator;
the radial primary distribution pipe is arranged along the radial direction of the regenerator, the bottom of the radial primary distribution pipe is communicated with the air inlet bent pipe, and one end of the radial primary distribution pipe is inserted into the central support piece;
the radial support beams are arranged along the radial direction of the regenerator, the radial support beams and the radial primary distribution pipes are alternately arranged along the circumferential direction of the regenerator, and two ends of each radial support beam are respectively hinged to the central support piece and the end support hinge;
the radial sliding block is arranged on the radial supporting beam and can slide along the radial supporting beam;
the annular secondary distribution pipe is arranged along the circumferential direction of the regenerator, and two ends of the annular secondary distribution pipe are respectively connected to the radial primary distribution pipe and the radial sliding block, wherein the annular secondary distribution pipe is communicated with the radial primary distribution pipe and is spliced with the radial sliding block.
2. A thermally expanded self-coordinated prevailing wind distributor according to claim 1, wherein said central support comprises a multi-branch support sleeve into which said radial primary distribution pipes are inserted, said radial support beams being hinged with said central support.
3. The thermally expanded self-coordinated prevailing wind distributor of claim 2, wherein a length of each of said multi-branch support sleeves satisfies the following formula:
L0+|△RA|+|△RB|+|△R9|<L9<X2 (7)
wherein L is9Indicates the length of each branch support sleeve, L0Represents the length of insertion of the insertion end, Δ R, into the multi-branch supporting sleeve, set at the end of the radial primary distribution pipe at normal temperatureAThe radial thermal expansion amount of the air inlet bent pipe with a penetration point A of the air inlet bent pipe and the shell wall of the regenerator as a base point when the thermal expansion self-coordinated main wind distributor works is represented, the air inlet bent pipe and the shell wall of the regenerator are provided with contact surfaces, the penetration point A is positioned at an intersection point of the contact surfaces and the center line of the air inlet bent pipe, and the delta R isBThe radial thermal expansion amount of the radial primary distribution pipe with a penetration point B between the radial primary distribution pipe and the air inlet bent pipe as a base point when the thermal expansion self-coordinated main wind distributor works is shown, the penetration point B is positioned at the intersection point of the central line of the air inlet bent pipe and the pipe wall of the radial primary distribution pipe, and delta R9Indicating the center of operation of the thermally expanded self-coordinated prevailing wind distributorThe thermal expansion amount, X, of the support member along the length direction of the support member with the center point D of the support member as a base point2Represents the distance between the end of the radial primary distribution pipe and the central point D of the central support at normal temperature.
4. The thermally expanded self-coordinated prevailing wind distributor of claim 3, wherein a width of said radial slider satisfies the following formula:
Figure FDA0002658943120000021
wherein L is6Representing half the width of the radial slider,
Figure FDA0002658943120000022
the line which takes the intersecting point A as a base point and connects the intersecting point A with the end point C of the annular secondary distribution pipe when the thermal expansion self-coordination type main wind distributor works
Figure FDA0002658943120000023
Component of thermal expansion amount in the width direction of the radial slider at point C, L4Represents the length of the insertion end of the annular secondary distribution pipe inserted into the radial slide block at normal temperature, X6τThe distance between the end point C and the center of the radial slider at normal temperature is represented.
5. The main wind distributor with self-coordinated thermal expansion of claim 3, wherein the radial support beam is provided with a limiting part, and the limiting part is arranged on two sides of the radial slider along the length direction of the radial slider and used for limiting the sliding range of the radial slider.
6. The thermally expanded self-coordinated prevailing wind distributor of claim 5, wherein distance X between said stop member and radial slider6rThe following formula is satisfied:
Figure FDA0002658943120000031
wherein, Δ R6Represents the radial displacement of the radial supporting beam relative to the position of the radial sliding block under normal temperature when the thermal expansion self-coordinated main wind distributor works,
Figure FDA0002658943120000032
the line which takes the point A of the intersecting point as a base point and connects the point A of the intersecting point with the end point C of the annular secondary distribution pipe when the thermal expansion self-coordination type main wind distributor works
Figure FDA0002658943120000033
The component of the amount of thermal expansion at the end point C along the length of the radial slider.
7. The thermally expanded self-coordinated prevailing wind distributor of claim 1, wherein said radial primary distribution pipes and said circumferential secondary distribution pipes are provided at the same height.
8. The thermally expanded self-coordinated prevailing wind distributor of claim 1, wherein the hinged length of said end support hinges is:
L7＝α1△T1L8/(α2△T2) (11)
wherein L is7Denotes the hinge length, a, of the end support hinge1Representing the coefficients of thermal expansion, alpha, of said radial primary and toroidal secondary distribution pipes2Representing the coefficient of thermal expansion, Δ T, of the end support hinge1Expressing the difference between the working temperature of the radial primary distribution pipe and the working temperature of the annular secondary distribution pipe and the normal temperature, delta T2Indicating the difference between the working temperature of the end support hinge and the ambient temperature, L8A center line representing the radial primary distribution pipe and a circumferential secondary distribution pipeThe inlet manifold and the shell wall of the regenerator are provided with a contact surface, and the intersection point A is located at the intersection point of the contact surface and the inlet manifold center line.
9. The thermally expanded self-coordinated prevailing wind distributor of claim 1, wherein said radial primary distribution tubes are evenly distributed around said central support.
10. The thermally expanded self-coordinated prevailing wind distributor of claim 1, wherein said circumferential secondary distribution pipes are evenly arranged between said radial primary distribution pipes and said radial sliders in a radial direction of said regenerator.
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