CN119958955B - A high temperature gaseous pollutant measuring device - Google Patents

Abstract

The invention belongs to the technical field of gas measurement, and particularly provides a high-temperature gaseous pollutant measuring device which comprises a base box and a measuring tube fixedly arranged on the upper wall of the base box, wherein an air inlet disc is arranged in the middle of the measuring tube, exhaust isolating rings are symmetrically distributed at two ends of the measuring tube, an isolating tube is fixedly arranged at one end, far away from the measuring tube, of the exhaust isolating rings, a wrapping sleeve is fixedly arranged at one end, far away from the exhaust isolating rings, of the isolating tube, and an equipment cylinder is fixedly arranged on the inner wall of the wrapping sleeve. According to the invention, the high-temperature gas is conveyed from the middle part to the two ends, and the effects of rotary cleaning of the isolation lenses, cooling and heat preservation of the measuring equipment, formation of an airflow curtain for isolating the high-temperature gas and auxiliary condensation, purification and adsorption are realized by using the cooling gas, so that the problems that in the prior art, the cooling gas is easy to mix with the high-temperature gas to cause measurement errors, the equipment is difficult to clean effectively, and the condensation and the fog cause measurement failure are effectively solved.

Description

A high temperature gaseous pollutant measuring device

Technical Field

The invention belongs to the technical field of gas measurement, and in particular relates to a high-temperature gaseous pollutant measuring device.

Background Art

High-temperature gaseous pollutants (such as SOx, NOx, CO, volatile organic compounds and particulate matter) emitted from high-temperature industrial processes (such as combustion furnaces, kilns, gas turbines, etc.) in the fields of metallurgy, chemical industry, energy, etc. have become an important source of air pollution. Therefore, it is necessary to measure the gases emitted by the above-mentioned various types of high-temperature industries and formulate effective prevention and control measures to control pollutant emissions.

In the prior art, gas testing mostly uses infrared, ultraviolet or laser as the measurement light source. The measurement light source is isolated from the gas to be tested by an isolation lens, and the absorption characteristics of light waves by different types of gaseous pollutant particles are used to measure different types of gas concentrations. Since optical and electronic components cannot work in high-temperature test environments, this application is limited and can generally only measure gaseous pollutants below 60°C.

If high-temperature gaseous pollutants (60°C and above) are measured, clean cooling gas (compressed air or nitrogen for the instrument) is required to cool the isolation lens and the measuring light source equipment. However, the cooling gas will mix with the high-temperature gaseous pollutants, causing the concentration of the high-temperature gaseous pollutants to decrease and become uneven, affecting the measurement results. The measuring optical path will also be affected by the cooling airflow. This type of method is only suitable for measurements in laboratories that precisely control the cooling air flow rate and is not suitable for industrial sites.

At the same time, when the existing technology measures high-temperature gaseous pollutants, pollutant particles are easily attached to the isolation lens. It is difficult to effectively clean the isolation lens by relying solely on cooling gas in a single direction. The mixing of cooling gas and high-temperature gaseous pollutants will produce condensed water, which makes the particles in the gas more easily adsorbed inside the equipment and on the surface of the isolation lens, causing measurement errors and equipment damage.

Summary of the invention

In view of the above technical problems, the present invention provides a high-temperature gaseous pollutant measuring device, which overcomes the shortcomings of the prior art. The present invention places an air inlet disk in the middle of the measuring tube, so that the high-temperature gas enters from the middle of the measuring tube and is transported to both ends. The air inlet disk can make the high-temperature gas flow more evenly, and then the exhaust isolation ring is used to isolate the cooling gas from the high-temperature gas to prevent the high-temperature gas from being disturbed by the cooling gas, thereby ensuring the stability of the measurement optical path and making the measurement results more accurate. During the transportation process, the cooling gas can also realize the functions of rotating and cleaning the isolation lens, cooling and heat-insulating the measuring equipment, forming an airflow curtain to isolate the high-temperature gas, and assisting in condensation, purification, and adsorption, effectively solving the problems of low measurement accuracy, difficulty in effective cleaning, and measurement failure caused by condensation and fogging in the prior art.

The technical solution adopted by the present invention is as follows: This solution provides a high-temperature gaseous pollutant measuring device, the main structure of which consists of a base box and a measuring tube fixedly arranged on the upper wall of the base box, an air inlet disk is arranged in the middle of the measuring tube for receiving high-temperature gas, exhaust isolation rings are symmetrically distributed at both ends of the measuring tube, an isolation tube is fixedly arranged at one end of the exhaust isolation ring away from the measuring tube, a wrapping sleeve is fixedly arranged at one end of the isolation tube away from the exhaust isolation ring, an equipment tube is fixedly arranged on the inner wall of the wrapping sleeve, a wrapping cavity is arranged between the inner wall of the wrapping sleeve and the outer wall of the equipment tube, the wrapping cavity between the inner wall of the wrapping sleeve and the outer wall of the equipment tube is connected with the inside of the isolation tube, a light source transmitter is fixedly arranged in one of the equipment tubes, a light source receiver is fixedly arranged in the other equipment tube, the light source transmitter and the light source receiver are arranged correspondingly, the light source transmitter emits measuring light, and the light source receiver receives the measuring light, which is used to measure the pollutants in the high-temperature gas in the measuring tube, an isolation lens is fixedly arranged at the end of the equipment tube close to the isolation tube, and a through cavity is formed between the isolation lenses on the two equipment tubes.

A cold air box is fixedly provided on the inner wall of the base box, and an air outlet of the cold air box is connected to a cold air pump. An air outlet of the cold air pump is connected to two cold air branch pipes. The ends of the two cold air branch pipes away from the cold air pump are respectively connected with the circumferential wall of the isolation tube. An I-shaped plate is rotatably provided on the inner wall of the isolation tube, and a light through hole is penetrated through the middle of the I-shaped plate for measuring the passage of light. The through connection point between the cold air branch pipe and the isolation tube is located between the two disks of the I-shaped plate, and an eccentric air blowing port is provided in a circular array on the side wall of a disk of the I-shaped plate close to the isolation lens, and the eccentric air blowing port is inclined toward the isolation lens.

A cold air return pipe is provided through the end of the wrapping sleeve away from the isolation pipe, the cold air return pipe is connected to the wrapping cavity, an air curtain pipe 1 is connected between the cold air return pipe and the circumferential outer wall of the exhaust isolation ring, a semi-ring air outlet strip and a semi-ring air suction strip are fixedly provided on the circumferential inner wall of the exhaust isolation ring, the semi-ring air outlet strip and the semi-ring air suction strip are symmetrically and arranged oppositely, the air curtain pipe 1 penetrates the circumferential outer wall of the exhaust isolation ring and is connected to the semi-ring air outlet strip, an air curtain air pump 1 is fixedly provided on the outer wall of the wrapping sleeve, the air curtain air pump 1 is connected through the middle part of the air curtain pipe 1, an air curtain pipe 2 and an air curtain air pump 2 are fixedly provided on the circumferential outer wall of the exhaust isolation ring, and the air curtain pipe One end of the second wind curtain pipe passes through the outer circumferential wall of the exhaust isolation ring and is connected with the semi-ring suction strip. The second wind curtain air pump is connected to the middle part of the second wind curtain pipe. A spiral exhaust duct is fixedly provided on the outer circumferential wall of the exhaust isolation ring. The spiral exhaust duct is located on the top wall of the base box. The upper end of the spiral exhaust duct passes through the inside of the exhaust isolation ring. The other end of the second wind curtain pipe is connected with the spiral exhaust duct. The lower end of the spiral exhaust duct is connected with the exhaust pipe. An exhaust pump is fixedly provided on the inner wall of the base box. The air inlet end of the exhaust pump is connected with the exhaust pipe through a pipe. The height of one end of the exhaust pipe close to the spiral exhaust duct is lower than the height of the other end close to the exhaust pump.

The air outlet end of the exhaust pump extends to the outside of the base box, and a filter collection box is fixedly connected to the bottom wall of the base box. The lower wall of the filter collection box is open, and the lower wall of the filter collection box passes through the bottom wall of the base box. The upper wall of the filter collection box is connected to the lower end of the spiral exhaust pipe through a pipe. A plug plate is removably provided on the inner wall of the filter collection box, and a sponge is provided on the upper wall of the plug plate. The sponge is removably arranged inside the filter collection box.

As a further preference of the present scheme, the air intake disk is composed of an air intake equalizing ring and a trumpet ring, the trumpet rings are symmetrically distributed and connected on both sides of the air intake equalizing ring, the two trumpet rings are fixedly connected to the measuring tubes respectively, the interior of the air intake equalizing ring is hollow, the interior of the air intake equalizing ring is connected with the interior of the measuring tube, an annular array of intake branch pipes is penetrated through the circumferential outer wall of the air intake equalizing ring, an annular pipe is fixedly provided on the outer wall of the air intake equalizing ring, the annular pipe is connected through and connected with all the intake branch pipes, an air intake valve is connected through and connected to the ring pipe, an air duct is opened in an annular array inside the trumpet ring, one end of the air duct is connected with the interior of the air intake equalizing ring, the other end of the air duct penetrates the outer wall of the trumpet ring and faces the exhaust isolation ring, the other end of the air duct is directed parallel to the axial direction of the measuring tube, the wind blown out of the air duct flows along the inner wall of the measuring tube, and all the air ducts form cylindrical wind circles inside the measuring tube.

The method for using the high-temperature gaseous pollutant measuring device comprises the following steps:

Step 1: Intake conduction: connect the high-temperature gas to the intake valve;

Step 2: Equipment start-up: start air curtain air pump 2, air curtain air pump 1, exhaust pump and cold air pump;

Step 3: Airflow formation:

The high-temperature gas enters the middle of the measuring tube and flows to both ends of the measuring tube, forming a stable airflow in the measuring tube;

The cooling gas enters between the two discs of the I-shaped plate and is blown out from the eccentric air outlet. The I-shaped plate rotates to clean and cool the isolation lens in all directions.

The semi-circular air outlet strip blows air, the semi-circular air suction strip sucks air, and a stable airflow curtain is formed at the exhaust isolation ring;

The high-temperature gas and the cooling gas enter the spiral exhaust pipe, and the filter collection box absorbs and collects the mixed slurry formed by the condensed water and the polluted particles in the high-temperature gas;

Step 4: Measurement: The light source transmitter emits a measurement light, and the light source receiver receives the measurement light to measure the high-temperature gas in the measurement interval between the two exhaust isolation rings.

The beneficial effects achieved by the present invention are as follows:

(1) The present invention places the air intake disk in the middle of the measuring tube, so that the high-temperature gas enters from the middle of the measuring tube and is transported to both ends. The air intake disk can make the high-temperature gas flow more evenly. Then, the exhaust isolation ring is used to isolate the cooling gas from the high-temperature gas to prevent the high-temperature gas from being disturbed by the cooling gas, thereby ensuring the stability of the measuring optical path and making the measurement result more accurate. During the whole process, the cooling gas has multiple functions. First, it can drive the I-shaped disk to rotate and blow air to clean the isolation lens. Then, it can also wrap and insulate the measuring equipment to balance the temperature inside and outside the measuring equipment. It can also form an airflow curtain and participate in the condensation process to assist in purifying and adsorbing the measured gas.

(2) A portion of the high-temperature gas in the intake flow-balancing ring enters the middle of the measuring tube and flows toward both ends of the measuring tube under the guidance of the bell mouth of the bell ring. Another portion of the high-temperature gas flows out of the air duct in the bell ring and flows along the inner wall of the measuring tube. All the high-temperature gas flowing out of the air duct forms a cylindrical wind circle inside the measuring tube, reducing the possibility of turbulence, thereby forming a stable airflow in the measuring tube.

(3) The cooling gas enters between the two discs of the I-shaped plate and is blown out from the eccentric air outlet, thereby cleaning and cooling the isolation lens in all directions. At the same time, since the blowing angle of the eccentric air outlet is eccentrically set, during this process, the I-shaped plate will rotate due to the reverse thrust of the airflow, so that the eccentric air outlet can clean the isolation lens in all directions and at multiple angles, effectively preventing dust from adhering to the isolation lens;

(4) The cooling gas blown out from the eccentric air outlet is drawn into the wrapping cavity to wrap and insulate the equipment tube, so that the temperature inside and outside the equipment tube is balanced, effectively avoiding the possibility of fogging on both sides of the isolation lens due to temperature difference;

(5) The cooling gas is blown from the semi-circular air outlet strip to the semi-circular air suction strip, and a stable air flow curtain is formed between the semi-circular air outlet strip and the semi-circular air suction strip, which can effectively isolate the interaction between the high-temperature gas and the cooling gas and form a stable measurement optical path;

(6) The high-temperature gas in the measuring tube flows to the exhaust isolation ring, and the remaining cooling gas in the isolation tube also flows to the exhaust isolation ring. The two air flows enter the exhaust isolation ring and are sucked into the spiral exhaust duct. Then, they pass through the exhaust duct. The high-temperature gas and the cooling gas collide and mix in the exhaust isolation ring and the spiral exhaust duct, thereby generating condensed water. The condensed water mixes and collides with the pollutant particles in the high-temperature gas to form a mixed slurry. The mixed slurry collides against the inner wall of the spiral exhaust duct under the spiral guide action of the spiral exhaust duct, and slides downward with the action of the air flow until it enters the filter collection box. The sponge absorbs and collects the mixed slurry. Since the height of the exhaust pipe near the spiral exhaust pipe is lower than the height of the exhaust pipe near the exhaust pump, the exhaust pipe at the filter collection box is at the lowest position, which makes it easier for the mixed slurry to enter the filter collection box and can effectively prevent the mixed slurry from being sucked into the exhaust pump.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a schematic structural diagram of a high-temperature gaseous pollutant measuring device proposed by the present invention;

FIG2 is a schematic structural diagram of a high-temperature gaseous pollutant measuring device proposed by the present invention after removing the base box;

FIG3 is a partial enlarged view of portion A in FIG2 ;

FIG4 is a half-section structural diagram of the structure in FIG2 ;

FIG5 is a partial enlarged view of portion B in FIG4 ;

FIG6 is a partial enlarged view of portion C in FIG4 ;

FIG7 is a schematic diagram of the structure of the I-shaped plate proposed by the present invention;

FIG8 is a top half-section view of the structure in FIG2 ;

FIG9 is a cross-sectional view of the exhaust isolation ring provided by the present invention;

FIG10 is a side cross-sectional view of the filter collection box provided by the present invention;

FIG. 11 is a schematic diagram showing the connection principle of a high-temperature gaseous pollutant measuring device proposed by the present invention.

Among them, 1. Base box, 11. Air conditioning box, 12. Air conditioning pump, 13. Air conditioning branch pipe, 14. Exhaust pump, 15. Filter collection box, 151. Plug plate, 152. Sponge, 2. Measuring tube, 3. Inlet plate, 31. Inlet equalizing ring, 312. Inlet branch pipe, 313. Ring pipe, 314. Inlet valve, 32. Speaker ring, 321. Air duct, 4. Exhaust isolation ring, 41. Air curtain pipe 1, 42. Semi-ring air outlet Strip, 43, semi-ring suction strip, 44, wind curtain pipe two, 45, wind curtain air pump two, 46, spiral exhaust duct, 461, exhaust pipe, 5, isolation pipe, 51, wrapping sleeve, 511, wrapping cavity, 512, cold air return pipe, 513, wind curtain air pump one, 52, I-plate, 521, light through hole, 522, eccentric air outlet, 6, equipment tube, 61, light source transmitter, 62, light source receiver, 63, isolation lens.

In Figures 9 and 11, the solid arrow (→) indicates the flow direction of the high-temperature gas, and the dotted arrow ( ) direction indicates the flow direction of cold air.

The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

DETAILED DESCRIPTION

Embodiment 1: Please refer to Figures 1 to 5. This embodiment provides a high-temperature gaseous pollutant measuring device. The main structure of the measuring device consists of a base box 1 and a measuring tube 2 fixedly arranged on the upper wall of the base box 1. An air inlet disk 3 is arranged in the middle of the measuring tube 2 for receiving high-temperature gas. Exhaust isolation rings 4 are symmetrically distributed at both ends of the measuring tube 2. An isolation tube 5 is fixedly arranged at one end of the exhaust isolation ring 4 away from the measuring tube 2. A wrapping sleeve 51 is fixedly arranged at one end of the isolation tube 5 away from the exhaust isolation ring 4. An equipment tube 6 is fixedly arranged on the inner wall of the wrapping sleeve 51. A gas-tight seal 6 is arranged between the inner wall of the wrapping sleeve 51 and the outer wall of the equipment tube 6. There is a wrapping cavity 511, and the wrapping cavity 511 between the inner wall of the wrapping sleeve 51 and the outer wall of the equipment tube 6 is connected to the inside of the isolation tube 5. A light source transmitter 61 is fixedly provided in one of the equipment tubes 6, and a light source receiver 62 is fixedly provided in the other equipment tube 6. The light source transmitter 61 and the light source receiver 62 are correspondingly arranged. The light source transmitter 61 emits a measuring light, and the light source receiver 62 receives the measuring light, which is used to measure the pollutants in the high-temperature gas in the measuring tube 2. An isolation lens 63 is fixedly provided at the end of the equipment tube 6 close to the isolation tube 5, and a through cavity is formed between the isolation lenses 63 on the two equipment tubes 6.

As shown in Figures 1 to 7, a cold air box 11 is fixedly provided on the inner wall of the base box 1, and compressed nitrogen is stored in the cold air box 11 as a cooling gas. The air outlet end of the cold air box 11 is connected to a cold air pump 12, and the air outlet end of the cold air pump 12 is connected to two cold air branches 13. The ends of the two cold air branches 13 away from the cold air pump 12 are respectively connected to the circumferential wall of the isolation tube 5. An I-shaped disk 52 is rotatably provided on the inner wall of the isolation tube 5. A light through hole 521 is penetrated in the middle of the I-shaped disk 52 for measuring the passage of light. The through connection point between the cold air branch 13 and the isolation tube 5 is located between the two disks of the I-shaped disk 52. An eccentric blowing port 522 is provided in a circular array on the side wall of a disk of the I-shaped disk 52 close to the isolation lens 63, and the eccentric blowing port 522 is inclined toward the isolation lens 63.

As shown in Figures 1 to 9, a cold air return pipe 512 is provided through the end of the wrapping sleeve 51 away from the isolation tube 5, and the cold air return pipe 512 is connected to the wrapping cavity 511. A wind curtain pipe 41 is connected between the cold air return pipe 512 and the circumferential outer wall of the exhaust isolation ring 4. A wind curtain air pump 513 is fixedly provided on the outer wall of the wrapping sleeve 51. The wind curtain air pump 513 is connected to the middle part of the wind curtain pipe 41. A semi-ring air outlet strip 42 and a semi-ring air suction strip 43 are fixedly provided on the circumferential inner wall of the exhaust isolation ring 4. The semi-ring air outlet strip 42 and the semi-ring air suction strip 43 are symmetrically and oppositely arranged. The wind curtain pipe 41 passes through the circumferential outer wall of the exhaust isolation ring 4 and is connected to the semi-ring air outlet strip 42. A wind curtain pipe 2 44 and a wind curtain air pump 2 45 are fixedly provided on the circumferential outer wall of the exhaust isolation ring 4. 4 penetrates the circumferential outer wall of the exhaust isolation ring 4 and is connected to the semi-ring suction strip 43, the wind curtain air pump 2 45 is connected to the middle part of the wind curtain pipe 2 44, the circumferential outer wall of the exhaust isolation ring 4 is fixedly provided with a spiral exhaust pipe 46, the spiral exhaust pipe 46 is located on the inner top wall of the base box 1, the upper end of the spiral exhaust pipe 46 penetrates the inside of the exhaust isolation ring 4, the other end of the wind curtain pipe 2 44 is connected with the spiral exhaust pipe 46, the lower end of the spiral exhaust pipe 46 is connected with an exhaust pipe 461, an exhaust pump 14 is fixedly provided on the inner side wall of the base box 1, the air inlet end of the exhaust pump 14 is connected to the exhaust pipe 461 through a pipeline, the height of one end of the exhaust pipe 461 close to the spiral exhaust pipe 46 is lower than the height of one end close to the exhaust pump 14, and the air outlet end of the exhaust pump 14 extends to the outside of the base box 1.

As shown in Figures 1-3 and 10, a filter collection box 15 is fixedly connected to the inner bottom wall of the base box 1, and the lower wall of the filter collection box 15 is opened. The lower wall of the filter collection box 15 passes through the bottom wall of the base box 1, and the upper wall of the filter collection box 15 is connected to the lower end of the spiral exhaust pipe 46 through a pipe. The inner wall of the filter collection box 15 is threadedly connected with a plug plate 151, and the plug plate 151 is detachable. A sponge 152 is provided on the upper wall of the plug plate 151, and the sponge 152 is detachably arranged inside the filter collection box 15.

As shown in Figures 1 to 8, the air intake disk 3 is composed of an air intake flow equalizing ring 31 and a horn ring 32. The horn rings 32 are symmetrically distributed and connected to both sides of the air intake flow equalizing ring 31. The two horn rings 32 are respectively connected to the measuring tube 2 through a fixed connection. The air intake flow equalizing ring 31 is hollow inside, and the inside of the air intake flow equalizing ring 31 is connected to the inside of the measuring tube 2. An air intake branch pipe 312 is connected to the outer wall of the air intake flow equalizing ring 31 through a circular array. An annular pipe 313 is fixed to the outer wall of the air intake flow equalizing ring 31. The annular pipe 313 is connected to all The air intake branch pipe 312 is connected through it, and the air intake valve 314 is connected through it on the ring pipe 313. The ring array inside the trumpet ring 32 is provided with air ducts 321. One end of the air duct 321 is connected to the inside of the air intake equalizing ring 31, and the other end of the air duct 321 passes through the outer wall of the trumpet ring 32 and faces the exhaust isolation ring 4. The direction of the other end of the air duct 321 is parallel to the axial direction of the measuring tube 2. The wind blown out of the air duct 321 flows along the inner wall of the measuring tube 2, and all the air ducts 321 form a cylindrical wind circle inside the measuring tube 2.

When the high-temperature gaseous pollutant measuring device in this embodiment is used, the working process is as follows:

The operator first places the base box 1 firmly, connects the high-temperature gas to the air inlet valve 314, and then starts the wind curtain air pump 2 45, the wind curtain air pump 1 513, the exhaust pump 14 and the cold air pump 12. The exhaust pump 14 generates negative pressure inside the equipment to extract the high-temperature gas. The high-temperature gas enters the ring pipe 313 through the air inlet valve 314 and enters the air inlet equalizing ring 31 through the air inlet branch pipe 312. As shown in FIG. 11, a part of the high-temperature gas enters the middle of the measuring tube 2 and flows to the two ends of the measuring tube 2 under the guidance of the trumpet mouth of the trumpet ring 32. Another part of the high-temperature gas flows out from the air duct 321 in the trumpet ring 32 and flows along the inner wall of the measuring tube 2. All the high-temperature gases flowing out of the air duct 321 form a cylindrical wind circle inside the measuring tube 2 to reduce the possibility of turbulence, thereby forming a stable airflow in the measuring tube 2.

At the same time, the cold air pump 12 draws out the cooling gas in the cold air box 11 and transports it to the isolation tube 5 through the cold air branch pipe 13. The cooling gas enters between the two discs of the I-shaped plate 52 and is blown out from the eccentric blowing port 522, thereby performing multi-directional cleaning and cooling on the isolation lens 63. At the same time, since the blowing angle of the eccentric blowing port 522 is eccentrically set, during this process, the I-shaped plate 52 will rotate due to the reverse thrust of the airflow, so that the eccentric blowing port 522 can perform omni-directional and multi-angle cleaning on the isolation lens 63, effectively preventing dust from adhering to the isolation lens 63.

The air curtain air pump 1 513 and the air curtain air pump 2 45 form an air flow curtain in the exhaust isolation ring 4, and the working process is as follows:

The wind curtain air pump 1 513 is running, and the cooling gas blown out from the eccentric air outlet 522 is drawn into the wrapping cavity 511, so as to wrap and insulate the equipment tube 6, so that the temperature inside and outside the equipment tube 6 is balanced, and the possibility of fogging on both sides of the isolation lens 63 due to temperature difference is effectively avoided. The cooling gas is transported to the semi-annular air outlet strip 42 along the cold air return pipe 512 and the wind curtain pipe 1 41 and blown to the semi-annular air suction strip 43. The wind curtain air pump 2 45 draws the cooling gas at the semi-annular air suction strip 43 to the wind curtain pipe 2 44, and transports it to the spiral exhaust pipe 46. As shown in Figure 11, a stable airflow curtain is formed between the semi-annular air outlet strip 42 and the semi-annular air suction strip 43.

The exhaust pump 14 operates to generate the following gas flow:

The high-temperature gas in the measuring tube 2 flows to the exhaust isolation ring 4, and the remaining cooling gas in the isolation tube 5 also flows to the exhaust isolation ring 4. The two air flows enter the exhaust isolation ring 4 (the area outside the semi-ring air outlet strip 42 and the semi-ring air suction strip 43), and are sucked into the spiral exhaust pipe 46, and then pass through the exhaust pipe 461, and finally discharged from the base box 1 from the exhaust pump 14. In this process, the high-temperature gas and the cooling gas collide and mix in the exhaust isolation ring 4 and the spiral exhaust pipe 46, thereby generating condensed water, which is mixed with the pollutant particles in the high-temperature gas. The mixed slurry is formed by the collision. The mixed slurry hits the inner wall of the spiral exhaust pipe 46 under the spiral guiding action of the spiral exhaust pipe 46, and slides downward with the action of the air flow until it enters the filter collection box 15, and the sponge 152 absorbs and collects the mixed slurry. Since the height of the end of the exhaust pipe 461 close to the spiral exhaust pipe 46 is lower than the height of the end close to the exhaust pump 14, the exhaust pipe 461 at the filter collection box 15 is at the lowest position, which makes it easier for the mixed slurry to enter the filter collection box 15 and can effectively prevent the mixed slurry from being sucked into the exhaust pump 14.

There is a stable high-temperature gas flow between the two exhaust isolation rings 4 to form a measurement interval. The light source transmitter 61 emits a measurement light, and the light source receiver 62 receives the measurement light to measure the high-temperature gas in the measurement interval between the two exhaust isolation rings 4 .

Embodiment 2: This embodiment is based on embodiment 1. In order to measure high-temperature gas at a long distance and prevent operators from contacting and inhaling high-temperature gas, an intake hose (not shown in the figure) is connected to the intake valve 314 in this embodiment. The intake hose is made of hot-dip galvanized metal hose. The far end of the intake hose is placed in the high-temperature gas, so that high-temperature gas at a long distance can be measured.

Embodiment 3: This embodiment is based on embodiment 1. As shown in FIG1 , in order to facilitate use and placement, in this embodiment, legs are fixedly provided on the bottom wall of the base box 1 , and handles are fixedly provided on the side walls at both ends of the base box 1 .

The present invention and its implementation modes are described above. Such description is not restrictive. What is shown in the drawings is only one of the implementation modes of the present invention. The actual structure is not limited thereto.

Claims (5)

1. A high-temperature gaseous pollutant measuring device, comprising a base box (1) and a measuring tube (2) fixedly mounted on the upper wall of the base box (1), characterized in that: an air inlet disk (3) is provided in the middle of the measuring tube (2), exhaust isolation rings (4) are symmetrically arranged at both ends of the measuring tube (2), an isolation tube (5) is fixedly mounted at one end of the exhaust isolation ring (4) away from the measuring tube (2), a wrapping sleeve (51) is fixedly mounted at one end of the isolation tube (5) away from the exhaust isolation ring (4), a device tube (6) is fixedly mounted on the inner wall of the wrapping sleeve (51), and a A wrapping cavity (511) is connected to the interior of the isolation tube (5); an isolation lens (63) is fixedly provided at the end of the equipment tube (6) close to the isolation tube (5); a semi-circular air outlet strip (42) and a semi-circular air suction strip (43) are fixedly provided on the circumferential inner wall of the exhaust isolation ring (4); the semi-circular air outlet strip (42) and the semi-circular air suction strip (43) are symmetrically arranged and face each other; the wrapping sleeve (51) and the semi-circular air outlet strip (42) are connected via a pipeline; a spiral exhaust pipe (46) is fixedly provided on the circumferential outer wall of the exhaust isolation ring (4); and the semi-circular air suction strip (43) and the spiral exhaust pipe (46) are connected via a pipeline; An I-shaped disc (52) is rotatably provided on the inner wall of the isolation tube (5), a light through hole (521) is penetrated in the middle of the I-shaped disc (52), and an eccentric air outlet (522) is provided in a circular array on a side wall of a disc close to the isolation lens (63), and the eccentric air outlet (522) is inclined toward the isolation lens (63); A cold air box (11) is fixedly provided on the inner wall of the base box (1), and the cold air box (11) is connected to the isolation pipe (5) between the two discs of the I-shaped disc (52) through a pipeline. 2. A high-temperature gaseous pollutant measuring device according to claim 1, characterized in that an exhaust pump (14) is fixedly provided on the inner wall of the base box (1), and an air inlet end of the exhaust pump (14) is connected to the lower end of the spiral exhaust pipe (46) through a pipeline. 3. A high-temperature gaseous pollutant measuring device according to claim 2, characterized in that: a filter collection box (15) is fixedly connected to the inner bottom wall of the base box (1), and the upper wall of the filter collection box (15) is connected to the lower end of the spiral exhaust pipe (46) through a pipeline. 4. A high-temperature gaseous pollutant measuring device according to claim 1, characterized in that: the air intake disk (3) is composed of an air intake flow balancing ring (31) and a horn ring (32), the horn rings (32) are symmetrically distributed and connected to both sides of the air intake flow balancing ring (31), and the two horn rings (32) are respectively fixedly connected to the measuring tube (2). 5. A high-temperature gaseous pollutant measuring device according to claim 4, characterized in that the interior of the intake flow equalizing ring (31) is connected to the interior of the measuring tube (2), and an annular array of air ducts (321) are provided inside the horn ring (32).