CN113209780A - Purification treatment method for coke oven gas microcrystal adsorption regeneration tail gas - Google Patents
Purification treatment method for coke oven gas microcrystal adsorption regeneration tail gas Download PDFInfo
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- 238000001179 sorption measurement Methods 0.000 title claims abstract description 68
- 230000008929 regeneration Effects 0.000 title claims abstract description 60
- 238000011069 regeneration method Methods 0.000 title claims abstract description 60
- 239000000571 coke Substances 0.000 title claims abstract description 48
- 239000013081 microcrystal Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 38
- 238000000746 purification Methods 0.000 title claims abstract description 15
- 239000007788 liquid Substances 0.000 claims abstract description 121
- 239000010724 circulating oil Substances 0.000 claims abstract description 116
- 238000005406 washing Methods 0.000 claims abstract description 75
- 238000005507 spraying Methods 0.000 claims abstract description 49
- 239000007921 spray Substances 0.000 claims description 125
- 229910000831 Steel Inorganic materials 0.000 claims description 37
- 239000010959 steel Substances 0.000 claims description 37
- 239000012535 impurity Substances 0.000 claims description 26
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 claims description 6
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 3
- 238000003466 welding Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims 1
- 239000003921 oil Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 7
- 230000000903 blocking effect Effects 0.000 abstract description 5
- 230000000087 stabilizing effect Effects 0.000 abstract description 3
- 238000004939 coking Methods 0.000 abstract description 2
- UFWIBTONFRDIAS-UHFFFAOYSA-N Naphthalene Chemical compound C1=CC=CC2=CC=CC=C21 UFWIBTONFRDIAS-UHFFFAOYSA-N 0.000 description 24
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 10
- 238000007664 blowing Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 7
- 229910021529 ammonia Inorganic materials 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000010924 continuous production Methods 0.000 description 2
- 229920006395 saturated elastomer Polymers 0.000 description 2
- 241000219793 Trifolium Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000011010 flushing procedure Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1425—Regeneration of liquid absorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1493—Selection of liquid materials for use as absorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
- B01D53/185—Liquid distributors
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/10—Inorganic absorbents
- B01D2252/102—Ammonia
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2252/00—Absorbents, i.e. solvents and liquid materials for gas absorption
- B01D2252/50—Combinations of absorbents
- B01D2252/504—Mixtures of two or more absorbents
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Industrial Gases (AREA)
Abstract
The invention belongs to the technical field of a microcrystal adsorption process of coking gas, and particularly relates to a purification treatment method for regenerated tail gas adsorbed by microcrystals of coke oven gas. The purification treatment method comprises the steps of sequentially carrying out circulating liquid spraying washing and circulating oil spraying washing on the generated regeneration tail gas when the microcrystalline adsorption tower starts to regenerate; judging the blocking condition according to the pressure loss of the purified coke oven gas being more than 2000Pa, adjusting the spraying amount of the circulating oil/circulating liquid according to the gas amount of the purified coke oven gas and the temperature of the regenerated tail gas at the transverse pipe primary cooler, controlling the temperature range of 30-200 ℃ of the microcrystal adsorption regenerated tail gas to be 55-100 ℃ by spraying, and stabilizing the temperature index of the transverse pipe primary cooler. The purification treatment method simultaneously realizes the double effects of washing and temperature control of the regenerated tail gas.
Description
Technical Field
The invention belongs to the technical field of a microcrystal adsorption process of coking gas, and particularly relates to a purification treatment method for regenerated tail gas adsorbed by microcrystals of coke oven gas.
Background
The microcrystal adsorption process of coke oven gas is to utilize microcrystal adsorbing material to adsorb harmful impurity tar, naphthalene, ammonia and H in coke oven gas2S, and the like are adsorbed and removed to obtain pure purified coke oven gas, so that the smoke emission requirement of a coke oven gas kiln user is met.
Table 1: various indexes of microcrystal adsorption of coke oven gas
Tar, naphthalene, ammonia, H in the process of microcrystal adsorption2S and other harmful impurities are gradually enriched, the adsorption of the impurities in the adsorption tower passing through the adsorption period of about 5 days tends to be saturated, in order to avoid unqualified external coke oven gas caused by the breakdown of the impurities on the bed layer, the regeneration of the microcrystal adsorption of the coke oven gas is needed, and the tar, naphthalene, ammonia and H in the adsorption process are enriched on the bed layer2And (4) analyzing and regenerating impurities such as S and the like to ensure that the impurities have the condition of normal adsorption again in the next adsorption period.
The coke oven gas microcrystal adsorption regeneration comprises two steps of heating analysis and cold blowing: (1) the heating analysis is to periodically use purified coke oven gas (dosage: 3000 m)3/h-4000m3And h) carrying out regeneration analysis operation on the adsorption tower, heating the regenerated gas to 120 ℃ by adopting 0.4MPa saturated steam after the regenerated gas passes through a booster fan with a bypass, heating the regenerated gas to 200 ℃ by using an electric heater, and heating and analyzing the impurities enriched in the adsorption tower.
(2) And (5) ending the heating desorption operation when the temperature of the regeneration bed layer outlet reaches about 180 ℃, and entering a cold blowing stage. Purified coke oven gas (dosage: 3000 m) is adopted3/h-4000m3And h) carrying out regeneration cold blowing operation on the adsorption tower, and when the temperature of the outlet of the adsorption bed layer is reduced to 50 ℃, ending cold blowing, and enabling the adsorption tower to enter a standby state. The tail gas with impurities enters the upper section of the gas pipeline of the transverse pipe primary cooler in the blast cooling process and enters the gas purification system again for gas purification.
The above regeneration process has the following drawbacks at various stages: (1) initial stage of heat analysis and final stage of cold blowing: the raw gas which is exhausted from the coke oven and contains high-concentration tar, naphthalene and other impurities is fed into the inlet of the transverse pipe primary cooler, the temperature is 75-95 ℃, the temperature of the regenerated tail gas at the initial stage of the regeneration and heating analysis and at the final stage of cold blowing of the microcrystal adsorption tower is only about 30 ℃, and when the regenerated tail gas enters the gas pipeline at the top of the transverse pipe primary cooler, the regenerated tail gas enters the inletThe crude gas of the gas has larger temperature difference, and the partial regeneration tail gas forms local temperature drop at the inlet of the transverse pipe primary cooler, so that tar, naphthalene, ammonia and H2S and other impurities are easy to gather in a pipeline at the temperature of below 50 ℃, so that the blockage of a systematic process flow is caused, and safety accidents are caused.
(2) Final stage of heat analysis and initial stage of cold blowing: the temperature of the regenerated tail gas in the stage can reach more than 200 ℃, the temperature difference is large as that of the raw gas entering the inlet, the high temperature of the regenerated tail gas directly increases the cooling load of the transverse pipe primary cooler, the gas collection temperature of the primary cooler is higher, and the purification effect of the whole gas recovery system is influenced. Meanwhile, large temperature difference stress is formed on the gas pipeline at the upper section of the connecting transverse pipe primary cooler, the pipeline is damaged, gas leakage is caused, and process and safety accidents are caused. In addition tar, naphthalene, ammonia and H2S and other impurities can promote the corrosion of equipment in a high-temperature environment of more than 120 ℃.
In conclusion, the situation can affect the normal microcrystal adsorption regeneration effect, the normal continuous and stable operation of the microcrystal adsorption process of the coke oven gas cannot be ensured, and the problem of how to effectively stabilize the temperature of the regenerated gas and eliminate impurity blockage of the regenerated gas is the key for ensuring the industrialized application practice of the microcrystal adsorption process in the field of fine desulfurization of the coke oven gas.
Disclosure of Invention
The invention aims to provide a purification treatment method of coke oven gas microcrystal adsorption regeneration tail gas aiming at the defects existing in the existing microcrystal adsorption regeneration, and the purification treatment method simultaneously realizes the double effects of regenerated tail gas washing and temperature control. Eliminating the blocking effect of impurities such as tar, naphthalene and the like and ensuring the continuous production of the process. The temperature of the regeneration tail gas after spraying is controlled to be 55-100 ℃, the temperature difference stress is eliminated, the operation temperature of the transverse pipe primary cooler is stabilized, and the blocking influence of impurities such as tar, naphthalene and the like and the influence of the temperature difference stress are eliminated.
The technical scheme of the invention is as follows: a purification treatment method for coke oven gas microcrystal adsorption regeneration tail gas is characterized in that when a microcrystal adsorption tower starts to regenerate, circulating liquid spraying washing and circulating oil spraying washing are sequentially carried out on the generated regeneration tail gas; judging the blocking condition according to the pressure loss of the purified coke oven gas being more than 2000Pa, adjusting the spraying amount of circulating oil/circulating liquid according to the gas amount of the purified coke oven gas and the temperature of the regenerated tail gas at the transverse pipe primary cooler, controlling the temperature range of 30-200 ℃ of the microcrystal adsorption regenerated tail gas to be 55-100 ℃ through spraying, and stabilizing the temperature index of the transverse pipe primary cooler; the method comprises the following specific steps:
(1) washing the regenerated tail gas with circulating liquid: regenerated tail gas generated by the regeneration of the microcrystal adsorption tower enters a transverse pipe primary cooler through a regenerated tail gas pipeline connected to the bottom of the microcrystal adsorption tower, a circulating liquid temperature control spray head and a circulating liquid washing spray head are arranged in a pipeline section of the regenerated tail gas pipeline positioned at the bottom of the microcrystal adsorption tower, a circulating liquid conveying pipe and a circulating liquid pump are externally connected with the circulating liquid temperature control spray head and the circulating liquid washing spray head, and a circulating liquid outlet valve is arranged on the circulating liquid conveying pipe; circulating liquid is conveyed to a circulating liquid temperature control spray head and a circulating liquid washing spray head through a circulating liquid pump and a circulating liquid conveying pipe, the circulating liquid is sprayed inside a regeneration tail gas pipeline through the circulating liquid temperature control spray head and the circulating liquid washing spray head to form a three-dimensional sector, and temperature control and impurity washing are respectively carried out on regeneration tail gas; the washed circulating liquid enters a tower residual liquid collecting tank of the microcrystalline adsorption tower, and the residual circulating residual liquid enters a mechanical clarifying tank;
(2) washing the regenerated tail gas with circulating oil: a circulating oil temperature control spray head and a circulating oil washing spray head are arranged at the position where the regenerated tail gas enters the transverse pipe primary cooler, a circulating oil conveying pipe and a circulating oil pump are externally connected with the circulating oil temperature control spray head and the circulating oil washing spray head, and a circulating oil outlet valve is arranged on the circulating oil conveying pipe; circulating oil is delivered to a circulating oil temperature control spray head and a circulating oil washing spray head through a circulating oil pump and a circulating oil delivery pipe, the circulating oil is sprayed inside an upper-section gas pipeline through the circulating oil temperature control spray head and the circulating oil washing spray head to form a three-dimensional sector, and temperature control and impurity washing are respectively carried out on regenerated tail gas; the circulating oil washing liquid enters the transverse pipe primary cooler and is mixed with the circulating oil in the transverse pipe primary cooler to enter the circulating oil groove.
The circulating liquid temperature control spray head, the circulating liquid washing spray head, the circulating oil temperature control spray head and the circulating oil washing spray head are all petal-shaped. The traditional spray head has poor capability of washing and flushing impurities such as naphthalene, tar and the like in the pipeline. The invention provides an adjustable novel petal-shaped spray head which can be used for spraying tail gas generated by a coke oven gas microcrystal adsorption device in a comprehensive and dead-angle-free manner and realizing the function of fully washing impurities in the tail gas.
The four nozzles are four-leaf-shaped five-nozzle type or six-leaf-shaped seven-nozzle type.
The main structure of the four spray heads is that one end of each spray head is made of a seamless steel pipe, and the other end of each spray head is made of a seamless steel pipe and processed into a petal-shaped spray head; the inner diameter of the seamless steel pipe is selected from one of 15mm, 20mm, 25mm, 32mm, 40mm and 50mm, the corresponding lengths are 75mm, 100mm, 150mm, 200mm, 250mm and 300mm in sequence, and the wall thickness of the seamless steel pipe is determined according to the pressure grade of spraying circulating oil/circulating liquid; the inner diameter of the seamless steel pipe for processing the petal-shaped spray head is 15mm, 20mm, 25mm, 32mm, 40mm or 50mm, and the height of the corresponding spray head is 30mm, 35mm, 40mm, 45mm, 50mm or 55mm in sequence.
The inner diameter of the steel pipe used for processing the clover-shaped five-nozzle type spray head is 15-25 mm; the inner diameter of the steel pipe used for processing the six-leaf-grass-shaped seven-nozzle type spray nozzle is larger than 32 mm.
The spraying pressure of the spray head is 0.4 MPa-0.6 MPa, and the extension force of 5 crossed three-dimensional spraying sectors formed by spraying the four-leaf grass-shaped spray head and 7 crossed three-dimensional spraying sectors formed by spraying the six-leaf grass-shaped spray head can be enhanced by adopting the pressure range.
The four spray heads are connected with the circulating oil/circulating liquid conveying pipe by adopting a hyperbolic pipeline, wherein the inner diameter of a connecting necking opening is 2/3 of the diameter of the spray head, and the length of the hyperbolic pipeline is 1.5 times of the height of the spray head; and adopting a welding mode for connection.
The circulating liquid temperature control spray head and the circulating oil temperature control spray head form an included angle of 15-30 degrees with the incoming regeneration tail gas, and the temperature control effect of the spray head is enhanced.
The circulating liquid washing nozzle and the circulating oil washing nozzle form an included angle of 105-120 degrees with the incoming regeneration tail gas, and the effect of cleaning the pipe wall in a forward direction in the pipeline to remove impurities when the nozzles spray is enhanced.
The circulating liquid is hot ammonia water; the circulating oil is mainly a mixture of tar and hot ammonia water.
When the inner diameter of the circulating liquid spray head and/or the circulating oil spray head is 15-25 mm, the spray head is in a clover shape, and 5 crossed three-dimensional spray sectors are formed at a spray opening.
When the inner diameter of the circulating liquid spray head and/or the circulating oil spray head is larger than 32mm, the spray heads are in a hexalobular shape, and 7 crossed three-dimensional spray sectors are formed at the spray ports.
The invention has the beneficial effects that: the purification treatment method of the coke oven gas microcrystal adsorption regeneration tail gas is characterized in that a novel circulating oil/circulating liquid spray nozzle with a built-in pipeline is arranged at the bottom of a regeneration gas pipeline at the bottom of a microcrystal adsorption tower and at the position of a horizontal pipe primary cooler, circulating oil/circulating liquid at about 80 ℃ is sprayed, and when the microcrystal adsorption tower starts to regenerate, the generated regeneration tail gas is sequentially sprayed and washed by circulating liquid and sprayed and washed by circulating oil, and meanwhile, the temperature range of 30-200 ℃ of the microcrystal adsorption regeneration tail gas is controlled to be 55-100 ℃ by spraying, and the temperature index of the horizontal pipe primary cooler is stabilized. The temperature of the regenerated gas is stabilized, the influence of temperature difference stress is reduced, and the production temperature of the process is stabilized; washing impurities such as tar, naphthalene and the like, eliminating the blockage influence of the impurities such as the tar, the naphthalene and the like and ensuring the continuous production of the process. The temperature range of the microcrystalline adsorption regeneration tail gas is controlled to be 55-100 ℃ from 30-200 ℃, compared with the temperature of the raw coke oven gas at the inlet of the transverse pipe primary cooler, which is 75-95 ℃, the temperature difference between the regeneration tail gas at the inlet of the transverse pipe primary cooler and the raw coke oven gas is reduced to 20-40 ℃ from 45-125 ℃, the temperature of the regeneration tail gas entering the transverse pipe primary cooler tends to be stable, and the influence of temperature difference stress is eliminated.
Drawings
FIG. 1 is a schematic view of the device for purifying and treating the coke oven gas microcrystal adsorption regeneration tail gas.
Fig. 2 is a diagram of the working state of circulating liquid spraying in the embodiment.
Fig. 3 is a schematic structural view of a clover-shaped five-nozzle type spray head according to embodiments 1-3.
Fig. 4 is a schematic structural view of a hexalobular seven-nozzle spray head according to examples 4-6.
The system comprises a raw gas conveying pipeline 1, a raw gas inlet primary cooler inlet 2, a horizontal pipe primary cooler 3, a microcrystal adsorption tower regeneration fan 4, a purified coke oven gas steam heater 5, a purified coke oven gas electric heater 6, a purified coke oven gas inlet flow detection 7, a purified coke oven gas inlet pressure detection 8, a microcrystal adsorption tower 9, a purified coke oven gas inlet temperature detection 10, a regenerated tail gas outlet flow detection 11, a regenerated tail gas pipeline 12, a circulating oil pump 13, a circulating oil outlet valve 14, a circulating oil temperature control spray head/circulating oil washing spray head 15, a tower raffinate collecting pool 16, a tower raffinate collecting pool valve 17, a circulating liquid pump 18, a circulating liquid outlet valve 19, a circulating liquid temperature control spray head/circulating liquid washing spray head 20, a circulating liquid conveying pipeline 21 and a connecting necking port 22.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to the accompanying drawings.
According to the purification treatment method of the coke oven gas microcrystalline adsorption regeneration tail gas, when the microcrystalline adsorption tower 9 starts to regenerate, the generated regeneration tail gas is sequentially subjected to circulating liquid spraying washing and circulating oil spraying washing; judging the blocking condition according to the pressure loss of the purified coke oven gas being more than 2000Pa, adjusting the spraying amount of the circulating oil/circulating liquid according to the gas amount of the purified coke oven gas and the temperature of the regenerated tail gas at the transverse pipe primary cooler 3, controlling the temperature range of 30-200 ℃ of the microcrystal adsorption regenerated tail gas to be 55-100 ℃ through spraying, and stabilizing the temperature index of the transverse pipe primary cooler 3; the method comprises the following specific steps:
(1) washing the regenerated tail gas with circulating liquid: regenerated tail gas generated by the regeneration of the microcrystal adsorption tower 9 enters the transverse pipe primary cooler 3 through a regenerated tail gas pipeline 12 connected to the bottom of the microcrystal adsorption tower 9, a circulating liquid temperature control spray head and a circulating liquid washing spray head 20 are arranged in a pipeline section of the regenerated tail gas pipeline 12 positioned at the bottom of the microcrystal adsorption tower 9, a circulating liquid conveying pipe 21 and a circulating liquid pump 18 are externally connected with the circulating liquid temperature control spray head and the circulating liquid washing spray head, a circulating liquid outlet valve 19 is arranged on the circulating liquid conveying pipe 21, and the spraying amount of the circulating liquid is adjusted through the circulating liquid outlet valve 19, so that the washing capacity of the regenerated tail gas is ensured; circulating liquid is sent to a circulating liquid temperature control spray head and a circulating liquid washing spray head through a circulating liquid pump 18 and a circulating liquid conveying pipe 21, the circulating liquid is sprayed inside a regeneration tail gas pipeline 12 through the circulating liquid temperature control spray head and the circulating liquid washing spray head to form a three-dimensional sector, an included angle of 15-30 degrees is formed between the circulating liquid temperature control spray head and the coming regeneration tail gas, an included angle of 105-120 degrees is formed between the circulating liquid washing spray head and the coming regeneration tail gas, and the temperature control and impurity washing are respectively carried out on the coming regeneration tail gas; the washed circulating liquid enters a tower residual liquid collecting tank of the microcrystalline adsorption tower, and the residual circulating residual liquid enters a mechanical clarifying tank;
(2) washing the regenerated tail gas with circulating oil: a circulating oil temperature control spray head and a circulating oil washing spray head 15 are arranged at the position where the regenerated tail gas enters the transverse pipe primary cooler 3, a circulating oil conveying pipe and a circulating oil pump 13 are externally connected with the circulating oil temperature control spray head and the circulating oil washing spray head, a circulating oil outlet valve 14 is arranged on the circulating oil conveying pipe, the spraying amount of the circulating oil is adjusted through the circulating oil outlet valve 14, and the washing capacity of the regenerated tail gas is ensured; circulating oil is conveyed to a circulating oil temperature control spray head and a circulating oil washing spray head through a circulating oil pump 13 and a circulating oil conveying pipe, the circulating oil is sprayed inside an upper-section gas pipeline through the circulating oil temperature control spray head and the circulating oil washing spray head to form a three-dimensional sector, an included angle of 15-30 degrees is formed between the circulating oil temperature control spray head and incoming regeneration tail gas, an included angle of 105-120 degrees is formed between the circulating oil washing spray head and incoming regeneration tail gas, and temperature control and impurity washing are respectively carried out on the incoming regeneration tail gas; the circulating oil washing liquid enters the transverse pipe primary cooler and is mixed with the circulating oil in the transverse pipe primary cooler to enter the circulating oil groove.
The circulating liquid is hot ammonia water; the circulating oil is mainly a mixture of tar and hot ammonia water.
The main structure of the four spray heads is that one end of each spray head adopts a seamless steel pipe, and the other end of each spray head adopts the seamless steel pipe to be processed into a petal-shaped spray head. The inner diameter of the seamless steel tube can be selected from 15mm, 20mm, 25mm, 32mm, 40mm and 50mm, the corresponding length is 75mm, 100mm, 150mm, 200mm, 250mm and 300mm in sequence, and the wall thickness of the seamless steel tube is determined according to the pressure grade of spraying circulating oil/circulating liquid. The inner diameter of the seamless steel pipe for processing the petal-shaped spray head can be 15mm, 20mm, 25mm, 32mm, 40mm and 50mm, and the height of the corresponding spray head is 30mm, 35mm, 40mm, 45mm, 50mm and 55mm in sequence.
Example 1
The inner diameter of the seamless steel pipe for processing the circulating liquid temperature control spray head, the circulating liquid washing spray head, the circulating oil temperature control spray head and the circulating oil washing spray head is 15mm, a clover-shaped five-nozzle type is adopted, 5 crossed three-dimensional spraying sectors are formed by the spraying ports, and the height of the corresponding spray head is 30 mm. The inner diameter of the seamless steel pipe adopted at the other end is 15mm, the corresponding length is 75mm, and the wall thickness of the seamless steel pipe is determined according to the pressure grade of spraying circulating oil/circulating liquid. The spraying pressure of the spray head is 0.4 MPa-0.6 MPa, and the extension force of 5 crossed three-dimensional spraying sectors formed by spraying the clover-shaped spray head can be enhanced by adopting the pressure range.
The four spray heads are connected with the circulating oil/circulating liquid conveying pipe by adopting a hyperbolic pipeline, wherein the inner diameter of a connecting necking opening is 2/3 of the diameter of the spray head, and the length of the hyperbolic pipeline is 1.5 times of the height of the spray head; and adopting a welding mode for connection.
And when the microcrystal adsorption device starts to regenerate, starting a circulating oil pump and a circulating liquid pump to spray circulating oil/circulating liquid. Through pressure control and installation angle, the spraying amount of circulating oil/circulating liquid and the gas amount of fine setting regeneration tail gas are ensured to circulating oil/circulating liquid spraying amount to reach the cleaning effect to impurity such as tar, naphthalene, control regeneration tail gas temperature simultaneously, reduce violently manage the primary cooler cooling pressure, stabilize violently manage the primary cooler operating temperature index, satisfy the technological operation index requirement.
Example 2
The internal diameter of the seamless steel pipe used for processing the circulating liquid temperature control spray head, the circulating liquid washing spray head, the circulating oil temperature control spray head and the circulating oil washing spray head is selected to be 20mm, a cloverleaf-shaped five-nozzle opening type is adopted, 5 crossed three-dimensional spraying sectors are formed by the spraying openings, and the corresponding spray heads are 35mm in height. The inner diameter of the seamless steel pipe adopted at the other end is 20mm, the corresponding length is 100mm, and the wall thickness of the seamless steel pipe is determined according to the pressure grade of spraying circulating oil/circulating liquid.
Example 3
The internal diameter of the seamless steel pipe used for processing the circulating liquid temperature control spray head, the circulating liquid washing spray head, the circulating oil temperature control spray head and the circulating oil washing spray head is 25mm, a clover-shaped five-nozzle type is adopted, 5 crossed three-dimensional spraying sectors are formed by the spraying ports, and the corresponding spray heads are 40mm in height. The inner diameter of the seamless steel pipe adopted at the other end is 25mm, the corresponding length is 150mm, and the wall thickness of the seamless steel pipe is determined according to the pressure grade of spraying circulating oil/circulating liquid.
Example 4
The inner diameters of the seamless steel pipes for processing the circulating liquid temperature control spray head, the circulating liquid washing spray head, the circulating oil temperature control spray head and the circulating oil washing spray head are selected to be 32mm, a hexalobate-shaped seven-nozzle type is adopted, 7 crossed three-dimensional spraying sectors are formed by the spraying ports, and the heights of the corresponding spray heads are 45 mm. The inner diameter of the seamless steel pipe adopted at the other end is 32mm, the corresponding length is 200mm, and the wall thickness of the seamless steel pipe is determined according to the pressure grade of spraying circulating oil/circulating liquid.
Example 5
The inner diameters of the seamless steel pipes for processing the circulating liquid temperature control spray head, the circulating liquid washing spray head, the circulating oil temperature control spray head and the circulating oil washing spray head are 40mm, a six-leaf-grass-shaped seven-nozzle type is adopted, 7 crossed three-dimensional spraying sectors are formed by spraying nozzles, and the heights of the corresponding spray heads are 50 mm. The inner diameter of the seamless steel pipe adopted at the other end is 40mm, the corresponding length is 250mm, and the wall thickness of the seamless steel pipe is determined according to the pressure grade of spraying circulating oil/circulating liquid.
Example 6
The inner diameters of the seamless steel pipes for processing the circulating liquid temperature control spray head, the circulating liquid washing spray head, the circulating oil temperature control spray head and the circulating oil washing spray head are 50mm, a hexalobate-shaped seven-nozzle type is adopted, 7 crossed three-dimensional spraying sectors are formed by the spraying ports, and the heights of the corresponding spray heads are 55 mm. The inner diameter of the seamless steel pipe adopted at the other end is 50mm, the corresponding length is 300mm, and the wall thickness of the seamless steel pipe is determined according to the pressure grade of spraying circulating oil/circulating liquid.
Claims (10)
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Citations (21)
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