CN212713365U - Tail gas treatment device for delayed coking - Google Patents
Tail gas treatment device for delayed coking Download PDFInfo
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- CN212713365U CN212713365U CN202021379228.3U CN202021379228U CN212713365U CN 212713365 U CN212713365 U CN 212713365U CN 202021379228 U CN202021379228 U CN 202021379228U CN 212713365 U CN212713365 U CN 212713365U
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Abstract
The utility model relates to a delayed coking production facility field, specific tail gas processing apparatus for delayed coking that says so. The device comprises a first gas-collecting hood used for collecting tail gas at the top of a coke tower in a delayed coking system, a second gas-collecting hood used for collecting tail gas at the bottom of the coke tower in the delayed coking system and a tail gas treatment tower used for purifying the tail gas collected by the first gas-collecting hood and the second gas-collecting hood. The tail gas treatment tower comprises a tower body, a tail gas interface connected with a tail gas pipe is arranged at the bottom of the tower body, an exhaust port for discharging purified air is arranged at the top of the tower body, and a condensation treatment mechanism, an alkali washing treatment mechanism and a desaturation treatment mechanism are sequentially arranged between the tail gas interface and the exhaust port in the tower body. The utility model discloses can carry out reasonable optimization processing to the pollutant that coke tower produced, make the discharge to reach standard of coke tower tail gas.
Description
Technical Field
The utility model relates to a delayed coking production facility field, specific tail gas processing apparatus for delayed coking that says so.
Background
Delayed coking is a heavy oil deep thermal cracking processing technology and is a main technology for heavy oil processing at present. The delayed coking system generally has a coke drum 901 and a coke pool 904 as shown in fig. 1, wherein the coke drum 901 is connected with the coke pool 904 through a coke chute 903, a grab bucket 902 is arranged above the coke pool 904, and the coke in the coke pool is conveyed into a charging hopper through the grab bucket 902 and is transported by a subsequent coke conveying vehicle.
In the prior art, a coke tower is easy to generate a large amount of volatile organic compounds, malodorous gases and petroleum coke dust during production, which causes serious pollution to the environment and also causes adverse effects on the physical and mental health of production workers.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a tail gas processing apparatus for postponing coking carries out reasonable optimization processing to the pollutant that the coke tower produced, makes the discharge to reach standard of coke tower tail gas.
In order to solve the technical problem, the utility model discloses a technical scheme be: a tail gas treatment device for delayed coking comprises a first gas-collecting hood for collecting tail gas at the top of a coke tower in a delayed coking system, a second gas-collecting hood for collecting tail gas at the bottom of the coke tower in the delayed coking system, and a tail gas treatment tower for purifying the tail gas collected by the first gas-collecting hood and the second gas-collecting hood;
the gas collecting port of the first gas collecting hood is connected with the exhaust port at the top of the coke tower, the gas collecting port of the second gas collecting hood is connected with the coke chute and the exhaust port of the coke pool at the bottom of the coke tower, and the exhaust ports of the first gas collecting hood and the second gas collecting hood are connected with the tail gas treatment tower through the same tail gas pipe;
the tail gas treatment tower comprises a tower body, a tail gas interface connected with a tail gas pipe is arranged at the bottom of the tower body, a discharge port for discharging purified air is arranged at the top of the tower body, and a condensation treatment mechanism, an alkali washing treatment mechanism and a desaturation treatment mechanism are sequentially arranged in the tower body along the tail gas interface to the discharge port; the condensation treatment mechanism comprises a cold water spray nozzle and a condensation oil collecting tank arranged above the cold water spray nozzle, the alkali washing treatment mechanism comprises an alkali liquor spray nozzle and an alkali washing oil collecting tank arranged above the alkali liquor spray nozzle, and the desaturation treatment mechanism comprises a steam coil pipe used for heating the cooled and desulfurized tail gas to desaturate.
Preferably, the outside of tower body is equipped with the circulating pump that supplies the alkali lye circulation among the alkali wash treatment mechanism to use, and the inlet of circulating pump is connected on the tower body and is corresponded the position of alkali wash treatment mechanism bottom, and the leakage fluid dram of circulating pump is connected to alkali lye and sprays the shower nozzle after crossing with fresh alkali lye supply pipe.
Preferably, the leakage fluid dram of circulating pump is equipped with the tee bend, and an export of tee bend is connected to alkali lye spray shower nozzle after crossing with fresh alkali lye supply pipe, and another export of tee bend is connected to the caustic sludge decontamination water treatment mechanism through the governing valve, and the governing valve interlocks with the level sensor who corresponds the alkali lye liquid level of alkali wash treatment mechanism position in the detectable tower body.
Preferably, the condensation treatment mechanism further comprises a first wire mesh demister arranged in the tower body and positioned between the cold water spray nozzle and the condensation oil collecting tank, and the alkali washing treatment mechanism further comprises a second wire mesh demister arranged in the tower body and positioned between the alkali liquor spray nozzle and the alkali washing oil collecting tank.
Preferably, the bottom of the tower body is provided with a condensed water return pipe connected with a coke pool in the delayed coking system.
Preferably, be equipped with the fast switch valve on the exhaust pipe, be located the position that the fast switch valve is carried on the back in one side of the tail gas treatment tower on the exhaust pipe and be equipped with the gas detector who is arranged in detecting the combustible gas content in the exhaust pipe, gas detector and fast switch valve interlocking.
Preferably, the exhaust port of the first gas collecting hood is connected with the tail gas pipe through a first gas collecting fan, the exhaust port of the second gas collecting hood is connected with the tail gas pipe through a second gas collecting fan, and a booster fan for increasing the pressure of tail gas in the tail gas pipe to the tail gas treatment tower is further arranged on the tail gas pipe.
Preferably, the first gas-collecting hood and the second gas-collecting hood are both side-suction hoods made of corrosion-resistant materials.
Preferably, the first gas collecting fan and the second gas collecting fan are both axial flow fans, the booster fan is a centrifugal fan, and the first gas collecting fan, the second gas collecting fan and the booster fan are made of corrosion-resistant materials.
Advantageous effects
The utility model discloses in, two gas collecting channels of accessible collect coke tower top respectively and discharge and the pollution tail gas of bottom swift current burnt groove and coking chamber position, let in tail gas treatment tower with tail gas after, accessible condensation processing mechanism, alkali wash processing mechanism and take off saturation processing mechanism and cool off, desulfurize and take off the saturation processing to tail gas in proper order, make the waste gas after the processing can directly discharge from the top of tail gas treatment tower.
The utility model provides a tail gas treatment process can both realize unmanned on duty operation, does not change original coking decoking technology and operation, and the mobile device is few, and the fault rate is low, and the waste gas after the processing can directly discharge. The device has high equipment integration level, simple flow and safe and reliable process.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a partially enlarged schematic view of a portion of the tail gas treating tower according to the present invention;
the labels in the figure are: 1. the system comprises a tail gas treatment tower, 101, a discharge port, 102, a steam coil, 103, an alkaline washing oil collecting tank, 104, a second wire mesh demister, 105, an alkaline liquid spray nozzle, 106, a condensation oil collecting tank, 107, a first wire mesh demister, 108, a cold water spray nozzle, 109, a tail gas interface, 110, a circulating pump, 111, a liquid level sensor, 112, a regulating valve, 2, a quick switch valve, 3, a gas detector, 4, a booster fan, 5, a second gas collecting fan, 6, a second gas collecting hood, 7, a first gas collecting hood, 8, a first gas collecting fan, 9, a delayed coking system, 901, a coke tower, 902, a grab bucket, 903, a coke chute, 904, a coke pool, 10, a condensation treatment mechanism, 11, an alkaline washing treatment mechanism, 12 and a desaturation treatment mechanism.
Detailed Description
As shown in fig. 1, the utility model discloses a tail gas processing apparatus for postponing coking, including the first gas collecting channel 7 that is arranged in collecting coke tower 901 top tail gas among the delayed coking system 9, be arranged in collecting coke tower 901 bottom tail gas among the delayed coking system 9 second gas collecting channel 6 and be used for the first gas collecting channel 7 of purification treatment and the tail gas treatment tower 1 of second gas collecting channel 6 collection tail gas.
The first gas-collecting hood 7 and the second gas-collecting hood 6 are side-suction hoods made of corrosion-resistant materials. The gas collecting port of the first gas collecting hood 7 is connected with the gas outlet at the top of the coke tower 901, and the gas collecting port of the second gas collecting hood 6 is connected with the gas outlet of the coke chute 903 and the coke pool 904 at the bottom of the coke tower 901. The exhaust ports of the first gas-collecting hood 7 and the second gas-collecting hood 6 are connected with the tail gas treatment tower 1 through the same tail gas pipe. The exhaust port of the first gas collecting hood 7 is connected with the tail gas pipe through a first gas collecting fan 8, the exhaust port of the second gas collecting hood 6 is connected with the tail gas pipe through a second gas collecting fan 5, and a booster fan 4 is further arranged on the tail gas pipe and used for boosting the tail gas transmitted to the first gas collecting fan 8 and the second gas collecting fan 5 and then inputting the tail gas into the tail gas treatment tower 1. The first gas collecting fan 8 and the second gas collecting fan 5 are both axial flow fans, the booster fan 4 is a centrifugal fan, and the first gas collecting fan 8, the second gas collecting fan 5 and the booster fan 4 are made of corrosion-resistant materials.
Be equipped with quick switch valve 2 on the exhaust pipe in this embodiment, the position that lies in quick switch valve 2 and carry on the back in one side of the exhaust gas treatment tower 1 on the exhaust pipe is equipped with the gas detector 3 that is arranged in detecting combustible gas content in the exhaust pipe, and gas detector 3 interlocks with quick switch valve 2. When the gas detector 3 detects that the combustible gas discharged from the tail gas of the coke tower 901 exceeds the standard, the quick opening and closing valve is immediately closed through interlocking, so that a large amount of combustible gas is prevented from entering the tail gas treatment tower 1, and safety accidents are avoided.
As shown in fig. 2, the tail gas treatment tower 1 includes a tower body vertically distributed, a tail gas port 109 connected to a tail gas pipe is provided at the bottom of the tower body, a discharge port 101 for discharging purified air is provided at the top of the tower body, a condensation treatment mechanism 10, an alkaline washing treatment mechanism 11, and a desorption and treatment mechanism 12 are provided in the tower body in sequence between the tail gas port 109 and the discharge port 101, so that tail gas passing through the tower body in a vertical upward direction is sequentially cooled, desulfurized and desaturated, and the treated waste gas can be directly discharged from the discharge port 101 at the top of the tail gas treatment tower 1.
The condensation processing mechanism 10 comprises a cold water spray nozzle 108, a first wire mesh demister 107 arranged above the cold water spray nozzle 108, and a condensation oil collecting tank 106 arranged above the first wire mesh demister 107. The alkali cleaning processing mechanism 11 comprises an alkali liquor spraying nozzle 105, a second wire mesh demister 104 arranged above the alkali cleaning spraying nozzle, and an alkali cleaning oil collecting tank 103 arranged above the second wire mesh demister 104. The de-misting and treating mechanism 12 includes a steam coil 102 for heating de-saturation treatment of the cooled and de-sulfurized tail gas. The tail gas introduced from the tail gas pipe is firstly sprayed by cold water of a cold water spray nozzle 108 in the tower body to cool the tail gas, a cooling medium adopts low-temperature fresh water, and the cooled waste gas is demisted by a first wire mesh demister 107 and then enters an alkali washing treatment mechanism 11 through a riser of a condensation oil collecting tank 106 to be desulfurized. The tail gas is demisted by a second wire mesh demister 104, enters a depreciation and treatment mechanism 12 through a riser of an alkaline washing oil collecting tank 103, is heated by a steam coil pipe 102 in the depreciation and treatment mechanism 12, is desaturated and is discharged by a discharge port 101 at the top of the tower body after reaching the standard. In the condensation processing mechanism 10, the cold water spray nozzle 108 is connected with a low-temperature fresh water pipeline F, and the bottom of the tower body is provided with a condensed water return pipe connected with a coke pool 904 in the delayed coking system 9, namely the mark G in the figure is connected with the coke pool 904. The bottom of the depreciation and treatment mechanism 12 is connected with a depreciation and liquid discharge port C. The upper end a of the steam coil 102 is connected to a low pressure steam plant and the lower end B produces condensate and is connected to a condensate conduit.
Be equipped with the circulating pump 110 that supplies the alkali lye circulation use in the alkali wash processing mechanism 11 in the outside of tower body, the inlet of circulating pump 110 is connected on the tower body and is corresponded the position of alkali wash processing mechanism 11 bottom, the leakage fluid dram of circulating pump 110 is connected with the tee bend, an export of tee bend is connected to alkali lye spray shower nozzle 105 after crossing with fresh alkali lye supply pipeline, another export of tee bend is connected to alkali slag decontamination water treatment mechanism through governing valve 112, governing valve 112 and the detectable tower body in correspond the liquid level sensor 111 interlock of the alkali lye liquid level of alkali wash processing mechanism 11 position, governing valve 112 is by liquid level sensor 111 control switching. In the alkali washing processing mechanism 11, alkali liquor is added through a fresh alkali liquor replenishing pipeline D, and then the circulation of the alkali liquor between the bottom of the alkali washing processing mechanism 11 and the alkali liquor spraying nozzle 105 is controlled through a circulating pump 110. When the liquid level sensor 111 detects that the liquid level in the alkaline washing processing mechanism 11 exceeds the design requirement, the control regulating valve 112 is opened, and the alkali liquor is pumped to the alkaline residue sewage treatment mechanism E for processing through the circulating pump 110.
Claims (9)
1. A tail gas processing apparatus for delayed coking, its characterized in that: the device comprises a first gas-collecting hood (7) for collecting tail gas at the top of a coke tower (901) in a delayed coking system (9), a second gas-collecting hood (6) for collecting tail gas at the bottom of the coke tower (901) in the delayed coking system (9), and a tail gas treatment tower (1) for purifying and treating the tail gas collected by the first gas-collecting hood (7) and the second gas-collecting hood (6);
the gas collecting port of the first gas collecting hood (7) is connected with the exhaust port at the top of the coke tower (901), the gas collecting port of the second gas collecting hood (6) is connected with the exhaust port of the coke chute (903) and the coke pool (904) at the bottom of the coke tower (901), and the exhaust ports of the first gas collecting hood (7) and the second gas collecting hood (6) are connected with the tail gas treatment tower (1) through the same tail gas pipe;
the tail gas treatment tower (1) comprises a tower body, a tail gas interface (109) connected with a tail gas pipe is arranged at the bottom of the tower body, a discharge port (101) for discharging purified air is arranged at the top of the tower body, and a condensation treatment mechanism (10), an alkaline washing treatment mechanism (11) and a desaturation treatment mechanism (12) are sequentially arranged in the tower body along the space between the tail gas interface (109) and the discharge port (101); the condensation treatment mechanism (10) comprises a cold water spray nozzle (108) and a condensation oil collecting tank (106) arranged above the cold water spray nozzle (108), the alkali washing treatment mechanism (11) comprises an alkali liquor spray nozzle (105) and an alkali washing oil collecting tank (103) arranged above the alkali liquor spray nozzle (105), and the desaturation treatment mechanism (12) comprises a steam coil pipe (102) used for heating the cooled and desulfurized tail gas to desaturate.
2. The tail gas treatment plant for delayed coking according to claim 1, characterized in that: the outside at the tower body is equipped with and supplies alkali lye circulating use (110) in the alkali wash processing mechanism (11), and the position that corresponds alkali wash processing mechanism (11) bottom on the tower body is connected to the inlet of circulating pump (110), and the leakage fluid dram of circulating pump (110) is connected to alkali lye shower nozzle (105) after crossing with fresh alkali lye supplementary pipeline.
3. A tail gas treatment unit for delayed coking according to claim 2, characterized in that: the leakage fluid dram of circulating pump (110) is equipped with the tee bend, and an export of tee bend is connected to alkali lye spray shower nozzle (105) after crossing with fresh alkali lye supply pipeline, and another export of tee bend is connected to caustic sludge decontamination water treatment mechanism through governing valve (112), and governing valve (112) interlock with level sensor (111) that correspond the alkali lye liquid level of alkali wash treatment mechanism (11) position in the detectable tower body.
4. The tail gas treatment plant for delayed coking according to claim 1, characterized in that: the condensation processing mechanism (10) also comprises a first wire mesh demister (107) arranged in the tower body and positioned between the cold water spray nozzle (108) and the condensation oil collecting tank (106), and the alkali washing processing mechanism (11) also comprises a second wire mesh demister (104) arranged in the tower body and positioned between the alkali liquor spray nozzle (105) and the alkali washing oil collecting tank (103).
5. The tail gas treatment plant for delayed coking according to claim 1, characterized in that: the bottom of the tower body is provided with a condensed water return pipe connected with a coke pool (904) in the delayed coking system (9).
6. The tail gas treatment plant for delayed coking according to claim 1, characterized in that: be equipped with fast switch valve (2) on the tail gas pipe, be located fast switch valve (2) on the tail gas pipe and be equipped with gas detector (3) that are arranged in detecting combustible gas content in the tail gas pipe in the position of tail gas treatment tower (1) one side back to, gas detector (3) and fast switch valve (2) interlocking.
7. The tail gas treatment plant for delayed coking according to claim 1, characterized in that: the exhaust port of the first gas collecting hood (7) is connected with the tail gas pipe through a first gas collecting fan (8), the exhaust port of the second gas collecting hood (6) is connected with the tail gas pipe through a second gas collecting fan (5), and a booster fan (4) used for increasing the pressure of tail gas in the tail gas pipe to the tail gas treatment tower (1) is further arranged on the tail gas pipe.
8. An off-gas treatment unit for delayed coking according to claim 7, characterized in that: the first gas-collecting hood (7) and the second gas-collecting hood (6) are side-suction hoods made of corrosion-resistant materials.
9. An off-gas treatment unit for delayed coking according to claim 7, characterized in that: the first gas collecting fan (8) and the second gas collecting fan (5) are both axial flow fans, the booster fan (4) is a centrifugal fan, and the first gas collecting fan (8), the second gas collecting fan (5) and the booster fan (4) are made of corrosion-resistant materials.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021379228.3U CN212713365U (en) | 2020-07-14 | 2020-07-14 | Tail gas treatment device for delayed coking |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021379228.3U CN212713365U (en) | 2020-07-14 | 2020-07-14 | Tail gas treatment device for delayed coking |
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| CN212713365U true CN212713365U (en) | 2021-03-16 |
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| CN202021379228.3U Active CN212713365U (en) | 2020-07-14 | 2020-07-14 | Tail gas treatment device for delayed coking |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117695792A (en) * | 2024-02-05 | 2024-03-15 | 佛山市伊清环保工程技术有限公司 | Flue gas dust removal and purification equipment of spray drying tower and purification method thereof |
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2020
- 2020-07-14 CN CN202021379228.3U patent/CN212713365U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117695792A (en) * | 2024-02-05 | 2024-03-15 | 佛山市伊清环保工程技术有限公司 | Flue gas dust removal and purification equipment of spray drying tower and purification method thereof |
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