CN107541239B - Steam thermal cracking simulation experiment device and process - Google Patents
Steam thermal cracking simulation experiment device and process Download PDFInfo
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- CN107541239B CN107541239B CN201610500460.XA CN201610500460A CN107541239B CN 107541239 B CN107541239 B CN 107541239B CN 201610500460 A CN201610500460 A CN 201610500460A CN 107541239 B CN107541239 B CN 107541239B
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Abstract
The invention provides a steam thermal cracking simulation experiment device and a steam thermal cracking simulation experiment process, wherein the device comprises a raw material feeding device, a cracking furnace and a product quenching and recovering device which are sequentially connected, and the product quenching and recovering device comprises a direct quenching system and a circulating quenching and recovering system; the circulating quenching recovery system comprises a pyrolysis gas circulating quenching loop consisting of a gas-phase mixer, an indirect quencher, a cyclone separator, a gas circulating pump and a cooler, wherein the gas-phase mixer is hermetically connected with a discharge hole of a pyrolysis furnace tube; the direct quenching system vertically inserts a quenching water injection pipe into a discharge hole of the cracking furnace tube through the center inside the gas phase mixer, a water injection hole is arranged at the end part of the inserted end, and the quenching water is injected into the cracking furnace tube through the water injection hole. The invention has the advantages that the quenching water and the circulating gas product are injected into the high-temperature cracking gas in sequence for direct quenching twice, the cooling efficiency is high, the injection amount of the quenching water is small, the secondary reaction of the cracking gas can be effectively prevented, and the accuracy of the simulation effect of the cracking furnace is improved.
Description
Technical field
The present invention relates to a kind of steam thermal cracking imitative experimental appliance and techniques, and in particular to one kind has novel product anxious
The steam thermal cracking imitative experimental appliance of cold recovery device and the technique for carrying out simulation cracking experiment using the device.
Background technique
The triolefin (ethylene, propylene, butadiene) and triphen (benzene,toluene,xylene) of ethylene unit production are petrochemistry
The basic material of industry plays very important effect in petrochemical industry, while the height of ethylene yield is to measure a state
The important symbol of family's petro chemical industry development level.According to statistics, the propylene of about 95% ethylene and 50% or more in the world
It is to be produced by steam thermal cracking, constantly promotes ethylene unit operation level at present, ensured the optimization of ethylene production
One of development trend as ethylene production, it is therefore desirable to which steam thermal cracking imitative experimental appliance carries out industrial pyrolysis furnace quasi-
Really, it flexibly and quickly simulates, Optimizing Process Parameters and pyrolysis furnace operation conditions.
In steam thermal cracking imitative experimental appliance, cracking furnace pipe is the highest component of operation temperature in ethylene unit,
Intersect in cracking furnace pipe and a variety of parallel reactions and consecutive reaction occurs, generates purpose product ethylene, the primary first-order equation of propylene should be set
Method promotes primary first-order equation sufficiently to carry out, and generates the secondary response that the biggish product liquid of molecular weight gives birth to charcoal down to coking, not only former
Material consumption is big, principal product yield is low, and the raw charcoal of coking can deteriorate heat transfer, occluding device, all to cracking operation and steady production
Pole detrimental effect is brought, should try to inhibit its progress.And the quencher after pyrolysis furnace can moment " cooling " pyrolysis furnace go out
Mouth component, to terminate secondary response, while isolating light component, heavy constituent in cracking gas, and will be in cracking gas as far as possible
Dilution steam generation condenses out, therefore quencher is one of the important equipment of steam thermal cracking imitative experimental appliance.It is well known that right
In any given pyrolysis furnace operating condition, the temperature drop of cracking furnace gases is left closer to cracking outlet of still in quencher position
Low faster, the yield of light olefin is also bigger.
Currently, the product quenching recyclable device of steam thermal cracking imitative experimental appliance generally passes through the indirect quencher string of multistage
Connection refrigeration, patent CN 204111681U disclose a kind of steam thermal cracking imitative experimental appliance, the steam thermal cracking simulated experiment
The quencher of device includes the first cooler and the second cooler being linked in sequence, and the first and second cooler respectively includes shell
Be mounted on the intracorporal cracking air pipe of shell, be flow of cooling water space between shell and cracking air pipe, go out from cracking furnace pipe
The Pintsch process gas come temperature after the quencher is reduced to 200~300 DEG C, using two-stage water cooler and semiconductor refrigerating
Device can just be cooled to 3~5 DEG C, although the cracking air pipe axis of the first and second cooler being arranged to, there is an angle can make clearly
Coke operation is more quick and easy, but its cooling efficiency is not high and subsequent product separation and recovery need to add multistage cooler, causes
Entire imitative experimental appliance volume is larger, and disassembly, inspection operation are inconvenient.And if select by chilled water (chw) inject cracking furnace pipe in into
The direct chilling of row improves cooling efficiency and saves space, but needs to inject about 2-3 times feedstock oil charging to cracking furnace pipe
Cracking gas temperature just can be reduced to 40~55 DEG C from 800~900 DEG C of moments by the chilled water (chw) of amount, and introducing a large amount of chilled water (chw)s can draw
Furnace lifting overpressure and temperature fluctuation, and increase the load of subsequent indirect chilling and separator, it is unfavorable for the liquid phase collected and produces
Object carries out water-oil separating；Long period test is done simultaneously has that a large amount of chilled water (chw)s are cooling to be recycled to cracking liquid phase product reservoir, interruption
Emptying cracking liquid phase product reservoir will cause entire simulation device system pressure oscillation again, influence the normal experiment behaviour of simulator
It runs.
Summary of the invention
It is a kind of with novel product the technical problem to be solved by the present invention is in view of the above drawbacks of the prior art, provide
The steam thermal cracking imitative experimental appliance of chilling recyclable device, Pintsch process gas directly contact in cracking furnace pipe with chilled water (chw)
Quick chilling, out again with the recyclegas product mix that has cooled down and by further chilling after cracking furnace pipe, direct chilling twice
It combines cooling efficiency height and chilled water (chw) injection rate is small, can effectively prevent cracking gas that secondary response, and subsequent indirect urgency occurs
Cold and separator load reduces, and guarantees the normal experimental implementation operation of simulator, improves the standard of pyrolysis furnace simulation effect
True property.
To achieve the goals above, the present invention provides one kind to be used for steam thermal cracking imitative experimental appliance, including sequence
Feedstock device, pyrolysis furnace and the product quenching recyclable device of connection；The cracking furnace body center vertical is arranged one and is split
Boiler tube is solved, the cracking furnace pipe upper end is feed inlet, lower end is discharge port；The product quenching recyclable device includes direct
Chilling system and circulation chilling recovery system；The circulation chilling recovery system includes successively by gas phase mixer, indirectly urgency
The cracking gas circulation chilling circuit of cooler, cyclone separator, gas circulator and cooler composition, the gas phase mixer
It is the hollow round table shape mixer of one with the coaxial sealed connection of cracking furnace pipe discharge port；The direct quench system packet
The chilling water storage tank, chilled water (chw) mass flowmenter, chilled water (chw) water injection pipe of sequential connection are included, the chilled water (chw) water injection pipe is through gas phase
Internal mixer center vertical is inserted into cracking furnace pipe discharge port, and the end for being inserted into one end is equipped with water injection hole.
Above-mentioned steam thermal cracking imitative experimental appliance, feedstock device include raw material oil tank, feedstock oil feed pump,
Water storage tank and water quality flowmeter, provide feedstock oil and water for cracking reaction.Pyrolysis furnace from outside to inside include cracking furnace shell, every
Hot insulating layer, cracking furnace pipe, cracking furnace pipe electricity consumption are heated, and it is anti-that Pintsch process occurs in cracking furnace pipe for feedstock oil and water
It answers.Product quenching recyclable device includes direct quench system and circulation chilling recovery system；Direct quench system will come from chilling
The chilled water (chw) of water storage tank is directly injected into cracking furnace pipe after mass flowmenter measures, and Pintsch process temperature degree is from 800~900 DEG C
Moment is reduced to 55~70 DEG C, and Pintsch process gas enters gas phase mixer after the quick chilling of chilled water (chw)；Recycle chilling recycling system
System includes cracking gas circulation chilling circuit, cracking liquid phase product reservoir and flowmeter etc., and the pyrolysis product of cracking furnace pipe out is existed
It is further cooled down in gas phase mixer with the recyclegas product mix cooled down, cracked gas temperature is further from 55~70 DEG C
It is down to 35-50 DEG C, and pyrolysis product is carried out to be separated into gas/liquid two-phase, and be collected, analyze and measure.Due to high anneal crack
It vents one's spleen after contacting quick chilling with chilled water (chw) in cracking furnace pipe, is produced again with the recyclegas cooled down in gas phase mixer
Product are mixed by further chilling, and direct chilling, which combines, twice improves cooling efficiency, and the injection rate of chilled water (chw) is reduced, chilling
Water injection rate is 0.5-1.5 times of feedstock oil inlet amount, preferably the 1 of feedstock oil inlet amount times.
Above-mentioned steam thermal cracking imitative experimental appliance, the chilled water (chw) water injection pipe are perpendicular through gas phase internal mixer center
Straight cutting enters cracking furnace pipe discharge port, is inserted into the end of one end in cracking furnace pipe in cone, water injection hole may be provided at cone
On base circumference.The water injection hole of chilled water (chw) water injection pipe is at least 4.The height of the conical end of chilled water (chw) water injection pipe is chilling
Water water injection pipe is inserted into the 1/5-1/10 of the length in cracking furnace pipe.The diameter of chilled water (chw) water injection pipe is the 1/4- of cracking furnace pipe diameter
3/4, the length that chilled water (chw) water injection pipe is inserted into cracking furnace pipe is cracking furnace pipe length 1/8-1/12；It is preferred that diameter is cracking furnace pipe
The 1/2 of diameter, length are the 1/10 of cracking furnace pipe length.
Above-mentioned steam thermal cracking imitative experimental appliance, wherein may be used also between the feedstock device and pyrolysis furnace
One preheater is set, improves the temperature for entering the mixed raw material of cracking furnace pipe, is conducive to further shorten cracking furnace pipe length.
Spiral coil structure can be used in preheater pipeline, and spiral coil structure increases contact area and the time of contact of mixed raw material, makes
Raw material mixing is more uniform while reducing preheater and is taken up space.
Above-mentioned steam thermal cracking imitative experimental appliance, wherein between the water storage tank and water quality flowmeter and
It may be provided with a filter between chilling water storage tank and chilled water (chw) mass flowmenter, impurity entrance in storage tank effectively prevent to split
Solve boiler tube and subsequent analytical equipment.
Above-mentioned steam thermal cracking imitative experimental appliance, wherein between the cracking furnace pipe inlet port and outlet port also
May be provided with a differential manometer, by cracking furnace pipe inlet outlet pressure differential numerical value can accurate judgement tube coking degree, realize in time,
Effective coke cleaning.
The present invention also provides a kind of steam thermal cracking simulated experiment techniques, specifically include: water and feedstock oil by raw material into
Material device enters cracking furnace pipe by cracking furnace pipe feed inlet and is cracked, and the chilled water (chw) from chilling water storage tank passes through after metering
Chilled water (chw) water injection pipe injection cracking furnace pipe discharge port and pyrolysis product directly contact cooling, and pyrolysis product after cooling is mixed in gas phase
It is further cooled down in clutch with the recyclegas product mix cooled down, and separates and recovers gas/liquid phase product.The feedstock
One preheater is set between device and pyrolysis furnace, and the preheating temperature of preheater is 460-530 DEG C
Beneficial functional of the invention is:
(1) the product quenching recyclable device of above-mentioned steam thermal cracking imitative experimental appliance includes direct quench system and follows
Ring chilling recovery system, Pintsch process gas directly contact with chilled water (chw) in cracking furnace pipe and realize quick chilling, out cracking furnace pipe
Afterwards again with the further chilling of recyclegas product mix that has cooled down in gas phase mixer, direct chilling is combined cold twice
High-efficient, effectively prevent cracking gas from secondary response occurs.Chilled water (chw) injection rate is small simultaneously, subsequent indirect chilling and separation dress
Load reduction is set, the quick chilling of Pintsch process gas is completed under the premise of not introducing a large amount of inertia quencher.
(2) one end end of the chilled water (chw) water injection pipe insertion cracking furnace pipe of above-mentioned steam thermal cracking imitative experimental appliance is in
Cone, Pintsch process gas are drained through conical end gradually to annulus stream between chilled water (chw) water injection pipe and cracking furnace pipe
Dynamic, chilling system resistance reduces, and the pressure loss of cracking gas reduces；Water injection hole is uniformly arranged on chilled water (chw) water injection pipe circle simultaneously
On the base circumference of tapered end, realize chilled water (chw) and Pintsch process gas is sufficiently mixed heat transfer, is conducive to Pintsch process gas
Quick chilling, effectively prevent chilled water (chw) water injection hole nearby coking, guarantee simulator normal experimental implementation operation.
(3) the circulation chilling recovery system of above-mentioned steam thermal cracking imitative experimental appliance includes by gas phase mixer, indirectly
The cracking gas circulation chilling circuit of quencher, cyclone separator, gas circulator and cooler composition, the circulation chilling circuit
Simple structure and reasonable design realizes the separation of gas/liquid phase product and circulation gaseous products to the dual of the further chilling of cracking gas
Effect.
(4) above-mentioned steam thermal cracking imitative experimental appliance direct quench system separately sets chilling water storage tank, avoids reaction and uses
It is unstable that water and chilled water (chw) share same storage tank bring chilled water (chw) injection rate, it is close and the case where cause temperature fluctuation in boiler tube,
Ensure device quiet run.
Detailed description of the invention
Fig. 1 is the steam thermal cracking imitative experimental appliance structural schematic diagram of one embodiment of the invention.
Fig. 2 is the structural schematic diagram of the product quenching recyclable device of one embodiment of the invention.
Fig. 3 is the chilled water (chw) water injection pipe, cracking furnace pipe and gas phase mixer connection relationship diagram of one embodiment of the invention.
Fig. 4 is the structural schematic diagram of the chilled water (chw) water injection pipe of one embodiment of the invention.
Fig. 5 is the thermocouple sheath of one embodiment of the invention, cracking furnace pipe connection relationship diagram.
Wherein, appended drawing reference:
1, feedstock device, 11, raw material oil tank, 12, feedstock oil feed pump, 13, water storage tank, 14, water quality flow
Meter, 15, water filter, 2, pyrolysis furnace, 21, cracking furnace shell, 22, pyrolysis furnace insulating, 23, cracking furnace pipe, 231, split
Solution boiler tube feed inlet, 232, cracking furnace pipe discharge port, 24, thermocouple sheath, 25, thermocouple, 3, product quenching recyclable device,
31, gas phase mixer, 311, upper bottom surface central feeding mouth, 312, side wall feed inlet, 313, bottom surface discharge port, 314, bottom surface
Center connector, 32, direct quench system, 321, chilling water storage tank, 322, chilled water (chw) mass flowmenter, 323, chilled water (chw) water filling
Pipe, 3231, conical end, 3232, water injection hole, 3233, connecting pin, 324, chilling water filter, 33, circulation chilling recycling system
System, 331, indirect quencher, 332, cyclone separator, 333, gas circulator, 334, cooler, 335, cracking liquid product storage
Tank, 34, flowmeter, 4, feed preheater, 41, feed preheater pipeline, 42, feed preheater insulating, 5, purging nitrogen
Air valve, 6, Air for burning coke valve.
Specific embodiment
Following example is method in order to further illustrate the present invention, but be should not be limited thereto.It is right with reference to the accompanying drawing
Structural principle and working principle of the invention is described in detail:
Referring to figures 1-3, Fig. 1 is the steam thermal cracking imitative experimental appliance structural schematic diagram of one embodiment of the invention.Fig. 2
For the structural schematic diagram of the product quenching recyclable device of one embodiment of the invention.Fig. 3 is that the gas phase of one embodiment of the invention mixes
The structural schematic diagram of device, chilled water (chw) water injection pipe and cracking furnace pipe connection relationship.Steam thermal cracking imitative experimental appliance of the invention,
Feedstock device 1, pyrolysis furnace 2, product quenching recyclable device 3 including sequential connection, in which:
Feedstock device 1 includes raw material oil tank 11, feedstock oil feed pump 12, water storage tank 13 and water quality flowmeter
14, wherein raw material oil tank 11, water storage tank 13 can be forced into 0.1Mpa with nitrogen, while in order to reduce the viscosity of heavy charge,
Raw material oil tank 11 and pipeline can be heated to 65 DEG C by electric heating heat tracing.Water storage tank 13 is preferably added to distilled water, prevents steam
Incrustation of pipe after thermal cracking imitative experimental appliance is used for a long time reduces heat transfer, mass-transfer efficiency.
Pyrolysis furnace 2 is the high-temperature pyrolysis reactor with cylindrical burner hearth, from outside to inside includes cracking furnace shell 21, cracking
Furnace insulating 22, cracking furnace pipe 23.Cracking furnace pipe 23 is manufactured with high nickel alloy material, and cylindrical burner hearth is arranged vertically at
Center, upper end is feed inlet 231, and lower end is discharge port 232, electrical heating elements is provided with around cracking furnace pipe, for that will split
Solution raw material is heated to 750~900 DEG C of high temperature, and cracking furnace pipe includes the thermometric thermoelectricity for monitoring cracking furnace pipe interior temperature distribution
It is even.
Product quenching recyclable device 3 includes direct quench system 32 and circulation chilling recovery system 33, for that will crack production
Object carries out quick chilling and is separated into gas-liquid two-phase, and is collected, analyzes and measures.The circulation chilling recovery system 33 is wrapped
It includes and is made of gas phase mixer 31, indirect quencher 331, cyclone separator 332, gas circulator 333 and cooler 334
Cracking gas recycles chilling circuit and cracking liquid phase product reservoir 335, and gas phase mixer 31 is one coaxial with cracking furnace pipe 23
Hollow round table type mixer, preferably upper bottom surface radius is greater than bottom radius surface, upper bottom surface center and side wall respectively have one into
Material mouth 311,312, bottom surface have a discharge port 313, and there are a connector 314, feed inlet 311 and pyrolysis furnace in bottom surface center
Pipe discharge port 232 is tightly connected.The pyrolysis product come out from gas phase mixer bottom discharge port 313 is returned in cracking gas circulation chilling
Road carries out chilling separation, then by a part of the gas products of cooler 334 out from the side wall feed inlet 312 of gas phase mixer
Be recycled in gas phase mixer, the cracking gas come out with cracking furnace pipe discharge port 232 is mixed, make cracking gas temperature from 55~
70 DEG C are further reduced to 35-50 DEG C, and separate and recover gas/liquid phase product.Indirect quencher 331 is connected to gas phase mixer bottom
It is cylindrical jacket formula structure on face discharge port 313, tube side is made in cracking leave with rage, and cryogen walks shell side, can use the mixture of second alcohol and water
As cryogen, refrigerant temperature is -5~-3 DEG C, and cold and hot logistics is flowed in cross-current configuration, the cracking that can will be come out from gas phase mixer
Gas temperature is further reduced to 10-15 DEG C；Cyclone separator 332 separates vapor condensate liquid and liquid hydrocarbon from gas-phase product
It is recovered in cracking liquid phase product reservoir 335, gas-phase product is squeezed into cooler 334 through gas circulator 333 and further cooled down
To 5-10 DEG C, gas products a part of cooler 334 enters gas phase mixer 31 out, and another part is measured by flowmeter 34
It is vented after analysis.
The direct quench system 32 include be linked in sequence chilling water storage tank 321, chilled water (chw) mass flowmenter 322,
Chilled water (chw) water injection pipe 323, by the way that chilled water (chw) to be directly injected into cracking furnace pipe, cracking gas temperature is reduced from 800~900 DEG C of moments
To 55~70 DEG C；Described 323 one end of chilled water (chw) water injection pipe is inserted vertically into cracking furnace pipe 23 through 31 inside center of gas phase mixer
In and end be equipped with water injection hole, the other end and gas phase mixer bottom surface center connector 314 are tightly connected；Chilled water (chw) injection rate
It is measured by chilled water (chw) mass flowmenter 312, chilling water storage tank 311 can be forced into 0.1Mpa with nitrogen.
It may be provided with a preheater 4 between feedstock device 1 and pyrolysis furnace 2, preheater 4 is respectively original from inside to outside
Expect preheater pipeline 41 and feed preheater insulating 42.Preheater pipeline 41 preferably uses spiral coil structure.Preheating
The preheating temperature of device 4 is 460-530 DEG C.Between water storage tank 13 and water quality flowmeter 14 and chilling water storage tank 321 and chilling
Settable filter 324 between water quality flowmeter 322.
- Fig. 5 referring to fig. 4, Fig. 4 are the structural schematic diagram of the chilled water (chw) water injection pipe 323 of one embodiment of the invention.Fig. 5 is this
Invent the thermocouple sheath 24 and 23 connection relationship diagram of cracking furnace pipe of an embodiment.Chilled water (chw) water injection pipe 323 includes one
Conical end 3231 and connecting pin 3233, the base circumference of conical end 3231 are uniformly provided with water injection hole 3232；Chilled water (chw)
The height of the conical end 3231 of water injection pipe be 313 length 1/5-1/10 of chilled water (chw) water injection pipe, chilled water (chw) water injection hole 3232 to
It is less 4；A temperature element can be added on 332 suction line of cyclone separator simultaneously, to understand product quenching in time
The operating condition of recyclable device can properly increase as the case may be if there is the case where temperature indicates excessively high (such as > 50 DEG C)
The injection rate of chilled water (chw) or the refrigerant temperature for reducing quencher 331.Cracking furnace pipe 23 includes coaxial thermocouple sheath 24 simultaneously,
Thermocouple sheath 24 is hollow metal casing closed at one end, open at one end, out of cracking furnace pipe feed inlet insertion cracking furnace pipe
Portion；Temperature thermocouple 25 is inserted into from the open end of thermocouple sheath, and thermocouple 25 can be moved radially along reactor to monitor and split
Solve the Temperature Distribution inside boiler tube.
A differential manometer is also provided between cracking furnace pipe feed inlet 231 and discharge port 232.When differential manometer reading is greater than
When pressure drop (such as 10kpa) of preset cracking furnace pipe, steam thermal cracking imitative experimental appliance should be burnt.When burning
Feedstock oil charging is cut off, and cracking liquid phase product recoverer 335 is emptied, opens nitrogen valve 5 to preheater 4 and pyrolysis furnace
2 carry out nitrogen purging, and nitrogen purging opens Air for burning coke valve 6 after twenty minutes and is passed through nitrogen/air burn to pyrolysis furnace.
Below with identical cracking operation condition and identical cracking stock respectively in steam thermal cracking imitative experimental appliance A and this
Cracking simulation comparison test is carried out in steam thermal cracking imitative experimental appliance B shown in invention figure 1, is illustrated using of the invention
Steam thermal cracking imitative experimental appliance is to the quick chilling of Pintsch process gas and the beneficial effect of inhibition coking.The steam heat
Imitative experimental appliance A and B feedstock device having the same, pyrolysis furnace are cracked, only product separating and reclaiming device structure is different.
Wherein the product separating and reclaiming device of steam thermal cracking imitative experimental appliance A includes the indirect quencher of two sections of series connection, cyclonic separation
Device, cracking liquid phase product reservoir, cooler and flowmeter etc., the Pintsch process gas of cracking furnace pipe enters indirect two-stage quencher out
Realize that quick chilling, indirect two-stage quencher include shell and be mounted on the intracorporal cracking air pipe of shell, shell and cracking gas
It is the cryogen flowing space between pipeline, quencher length is 300mm, diameter of the housing 50mm, cracking gas pipeline diameter 10mm, ethyl alcohol
Mixture with water is as cryogen, and refrigerant temperature is -5 DEG C, and cold and hot logistics is flowed in cross-current configuration；Through whirlwind point after quick chilling
From device by vapor condensate liquid and liquid hydrocarbon from separation and recovery in gas-phase product to cracking in liquid phase product reservoir, gas-phase product is passed through
Cooler further cool down after by being vented after flowmeter quantitative analysis.The product quenching of steam thermal cracking imitative experimental appliance B
Recyclable device is made of direct quench system of the invention and circulation chilling recovery system, Pintsch process gas in cracking furnace pipe with
Chilled water (chw) directly contacts quick chilling, out again with the recyclegas product mix that has cooled down and by further anxious after cracking furnace pipe
Cold, the chilled water (chw) injection rate of direct quench system is 100g/h, recycles indirect quencher, the cyclonic separation of chilling recovery system
Device and cooler are identical with steam thermal cracking imitative experimental appliance A.
Naphtha is the most common cracking stock of industrial ethylene cracker, therefore this comparison cracking simulation test is with stone
Cerebrol is cracking stock, and physical data is as shown in table 1.The density of naphtha used is in 0.70g/cm-3Left and right, characterization factor 12
Left and right, 30 DEG C~170 DEG C of engler's boiling range；Race's composition constitute in linear paraffin mass fraction 30% or so, alkane (straight chain alkane
Hydrocarbon+branched paraffin) mass fraction is 65% or so, and all ethylene unit often uses naphtha physical property to every physical parameter at home
Within the scope of, the common naphtha of most of ethylene units can be represented, test result has generality and reliable spy
Point.
The physical data of 1 naphtha of table
Crack simulation test operating condition are as follows: naphtha feed amount is 90g/h, and water inlet amount is 47.5g/h, inlet pressure
0.1Mpa, residence time 100ms, cracking temperature are 890 DEG C, and the cracking simulation test time is 1.5h, during test, cracking
Gas phase is analyzed after gas-liquid separation and cooling by on-line gas chromatography, and lysate carries out poidometer after mutually passing through water-oil separation
Amount.After the completion of cracking simulation test, be passed through and burn gas by what nitrogen and air mixed, to cracking furnace pipe institute coking carbon into
Row is burnt, and wherein air capacity is 40L/h, nitrogen amount 10L/h, analyzed by infrared spectrum analyser and record burn CO in gas and
CO2The coking amount of concentration, cracking furnace pipe is calculated by the record result of infrared spectrum analyser, referring to Chinese patent
CN1580192A, as the CO and CO that burn in gas detected2Concentration from peak-fall to straight line after burn end, from
Start to be passed through and burns gas to the CO and CO burnt in gas2Concentration be straight line duration be burn the duration.
The major cleavage products yield of naphtha pyrolysis simulation test is carried out in different steam thermal cracking imitative experimental appliances (A and B)
And coking amount variation is shown in Table shown in 2, table 3.
The primary product yield of simulation test is cracked in the different imitative experimental appliance of table 2
The coking amount of simulation test is cracked in the different imitative experimental appliance of table 3
By table 2 and table 3 it is found that compared with steam thermal cracking imitative experimental appliance A, steam thermal cracking mould of the present invention
Draft experiment device B carries out the quick chilling of Pintsch process gas by the way that chilled water (chw) to be directly injected into cracking furnace pipe, out cracking furnace pipe
Cracking gas afterwards is again with the further chilling of recyclegas product mix that has cooled down, and temperature has dropped when cracking gas is into cyclone separator
To 25.9 DEG C, the quick chilling of Pintsch process gas is realized, triolefin (ethylene, propylene, butadiene) yield omits in gas-phase product
There are increase, C5And C5Above constituent content is lower, and liquid-phase pyrolysis collection of products is abundant, illustrates that the quick chilling of product inhibits and splits
It solves product and carries out secondary response, product separation is more abundant, and entire test process overall material balance is more excellent.From different simulated experiments
The coking amount comparison of simulation test is cracked on device as can be seen that by chilled water (chw) water injection pipe through gas phase internal mixer center vertical
Cracking furnace pipe imports and exports average pressure difference during not significantly increasing test in insertion cracking furnace pipe, and is passed through same amount of burn
Gas is burnt, and decreased duration is burnt, and coking amount is obviously reduced.
Certainly, the present invention can also have other various embodiments, without deviating from the spirit and substance of the present invention, ripe
Various corresponding changes and modifications, but these corresponding changes and modifications can be made according to the present invention by knowing those skilled in the art
It all should belong to protection scope of the present invention.
Claims (11)
1. a kind of steam thermal cracking imitative experimental appliance, feedstock device, pyrolysis furnace and product quenching including sequential connection
Recyclable device；The cracking furnace body center vertical arranges a cracking furnace pipe, the cracking furnace pipe upper end be feed inlet, under
End is discharge port；It is characterized in that, the product quenching recyclable device includes direct quench system and circulation chilling recycling system
System；The circulation chilling recovery system includes by gas phase mixer, indirect quencher (331), cyclone separator, gas circulation
The cracking gas of pump and cooler (334) composition recycles chilling circuit, and gas phase mixer is one total with cracking furnace pipe discharge port
The hollow round table shape mixer of axis connection；The direct quench system includes the chilling water storage tank being linked in sequence, chilling water quality
Flowmeter, chilled water (chw) water injection pipe are measured, the chilled water (chw) water injection pipe is inserted into cracking furnace pipe through gas phase internal mixer center vertical
Discharge port, the end for being inserted into one end are equipped with water injection hole.
2. steam thermal cracking imitative experimental appliance as described in claim 1, which is characterized in that the chilled water (chw) injection rate is
0.5-1.5 times of feedstock oil inlet amount.
3. steam thermal cracking imitative experimental appliance as claimed in claim 2, which is characterized in that the chilled water (chw) injection rate is
1 times of feedstock oil inlet amount.
4. steam thermal cracking imitative experimental appliance as described in claim 1, which is characterized in that the chilled water (chw) water injection pipe is inserted
Enter the end of cracking furnace pipe one end in cone, water injection hole is uniformly arranged on the base circumference of conical end.
5. steam thermal cracking imitative experimental appliance as claimed in claim 4, which is characterized in that the chilled water (chw) water injection pipe
Water injection hole is at least 4.
6. steam thermal cracking imitative experimental appliance as claimed in claim 4, which is characterized in that the chilled water (chw) water injection pipe circle
The height of tapered end is the 1/5-1/10 for the length that chilled water (chw) water injection pipe is inserted into cracking furnace pipe.
7. steam thermal cracking imitative experimental appliance as described in claim 1, which is characterized in that the chilled water (chw) water injection pipe
Diameter is the 1/2 of cracking furnace pipe diameter, and the length that chilled water (chw) water injection pipe is inserted into cracking furnace pipe is the 1/10 of cracking furnace pipe length.
8. steam thermal cracking imitative experimental appliance as claimed in claim 4, which is characterized in that the feedstock device and split
It solves and a preheater is set between furnace, the pipeline of the preheater uses spiral coil structure.
9. steam thermal cracking imitative experimental appliance as claimed in claim 4, which is characterized in that the cracking furnace pipe feed inlet and
One differential manometer is set between discharge port.
10. a kind of technique using the steam thermal cracking imitative experimental appliance as described in any one of claim 1-9, feature
It is to include: that water enters cracking furnace pipe by cracking furnace pipe feed inlet by feedstock device with feedstock oil and cracked, comes from
The chilled water (chw) of chilling water storage tank passes through chilled water (chw) water injection pipe injection cracking furnace pipe discharge port after metering and directly connects with pyrolysis product
Touching cooling, pyrolysis product after cooling are mixed into one with through subcooler (334) cooling gas products in gas phase mixer
Step cooling, and separate and recover gas/liquid phase product.
11. technique as claimed in claim 10, which is characterized in that one is arranged between the feedstock device and pyrolysis furnace
Preheater, the preheating temperature of preheater are 460-530 DEG C.
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| CN119656777B (en) * | 2024-11-05 | 2025-08-05 | 中国石油天然气集团有限公司 | An electric cracking furnace system and an electric cracking furnace system operating method |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202131285U (en) * | 2011-04-12 | 2012-02-01 | 中国石油化工股份有限公司 | Device for slowing down coking of oil gas pipeline on top of coke tower |
| CN204111681U (en) * | 2014-10-14 | 2015-01-21 | 中国石油天然气股份有限公司 | Steam cracking simulation experiment device and quencher thereof |
| CN105623721A (en) * | 2014-10-31 | 2016-06-01 | 中国石油化工股份有限公司 | Method for preparing raw material for needle-like coke |
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| US7235705B2 (en) * | 2004-05-21 | 2007-06-26 | Exxonmobil Chemical Patents Inc. | Process for reducing vapor condensation in flash/separation apparatus overhead during steam cracking of hydrocarbon feedstocks |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202131285U (en) * | 2011-04-12 | 2012-02-01 | 中国石油化工股份有限公司 | Device for slowing down coking of oil gas pipeline on top of coke tower |
| CN204111681U (en) * | 2014-10-14 | 2015-01-21 | 中国石油天然气股份有限公司 | Steam cracking simulation experiment device and quencher thereof |
| CN105623721A (en) * | 2014-10-31 | 2016-06-01 | 中国石油化工股份有限公司 | Method for preparing raw material for needle-like coke |
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