CN104667726A - Device and method for purifying in treatment of volatile gas of petrochemical coke cooling water tank - Google Patents
Device and method for purifying in treatment of volatile gas of petrochemical coke cooling water tank Download PDFInfo
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- CN104667726A CN104667726A CN201310643646.7A CN201310643646A CN104667726A CN 104667726 A CN104667726 A CN 104667726A CN 201310643646 A CN201310643646 A CN 201310643646A CN 104667726 A CN104667726 A CN 104667726A
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- absorption tower
- eddy flow
- absorbent
- tank
- injector
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Abstract
The invention discloses a device and a method for purifying in treatment of volatile gas of a petrochemical coke cooling water tank. The device comprises a buffering tank, a condenser, a first ejector, a first cyclone absorbing tower, a spraying head, a second cyclone absorbing tower, a second ejector, an exhaust barrel, a second circulating pump, a second circulating tank, a first circulating pump, a first circulating tank, an air guide pipe and an absorbent circulating pipe. According to the device, waste gas is collected and exported from the petrochemical coke cooling water tank, the buffering tank is used for smoothening the flow and separating out more of easily-condensed oil gas and water vapor, and then the waste gas enters the condenser (the waste gas from the petrochemical coke cooling water tank is cooled to be less than 50 DEG C) and finally enters the absorbing towers; two-stage cyclone plate towers are connected in series to perform circular absorbing; two-stage parallel ejectors are mounted at the front and back of the absorbing towers to be used as gas exporting power; meanwhile, absorbents and waste gas are fully mixed and absorbed through the ejectors; the mixed liquid enters an absorbent circulating tank to be subjected to gas-liquid separation and finally the separated liquid enters the exhaust barrel to be exhausted. The device has the advantages of being efficient, energy-saving, safe, reliable, and long in service life.
Description
Technical field
The present invention relates to the purifier and purification method thereof administered for petrochemical industry coke cooling water tank Volatile Gas.
Background technology
In oil refining production process, the organic compound such as baroque sulfur-bearing, nitrogen, oxygen contained in crude oil, under the series of process conditions such as heating, pressurization, catalytic oxidation or cracking, further conversion, decomposition produce a large amount of odorants such as the hydrogen sulfide with off-odor, organic sulfur compound, organic acid, these materials ease in air, can cause in various degree with the odor pollution of scope.Odor pollution in recent years becomes increasingly conspicuous, and has risen to the second largest public hazards being only second to noise, along with improving constantly of people's quality of life, also more and more higher to the requirement of environmental quality, and people also strengthen further to the concern of producing the odor pollution caused.Therefore, strengthen one of odor pollution control important content becoming efforts at environmental protection.
Especially cold Jiao of coking plant, coke cutting water tank foul waste gas, not only there is exhausted air quantity large, tolerance flow velocity is unstable, the feature of toxic and harmful complexity, wherein volatilize dusty gas mainly hydrogen sulfide, organic sulfur compound, ammonia nitriding compound, hydro carbons etc., and intractability is comparatively large, and currently used purifier process is easy to cause secondary pollution, there is clean-up effect difference, the shortcoming that the life-span is short and reliability is low.
Summary of the invention
The object of the present invention is to provide the purifier and purification method thereof administered for petrochemical industry coke cooling water tank Volatile Gas, it has advantage that is energy-efficient, safe and reliable and long service life.
The present invention is achieved like this, for the purifier that petrochemical industry coke cooling water tank Volatile Gas is administered, it comprises surge tank, condenser, first injector, first eddy flow absorption tower, spray head, second eddy flow absorption tower, second injector, aiutage, second circulating pump, second circulating tank, first circulating pump, first circulating tank, wireway and absorbent circulation pipe, it is characterized in that the top of surge tank connects the bottom of condenser, the top of condenser connects the first injector, the bottom of the first injector is connected with the bottom on the first eddy flow absorption tower and the top of the first circulating tank respectively, the top of the first circulating tank is connected to the lower wall on the first eddy flow absorption tower by wireway, spray head in first eddy flow absorption tower connects the first circulating tank and the first injector respectively by absorbent circulation pipe, spray head in first eddy flow absorption tower and the absorbent circulation pipe between the first circulating tank are connected with the first circulating pump,
Wireway is connected with between the top on the first eddy flow absorption tower and the second eddy flow absorption tower lower wall;
The bottom on the second eddy flow absorption tower connects the bottom of the second injector and the top of the second circulating tank respectively, the top on the second eddy flow absorption tower connects the second injector by wireway, spray head in second circulating tank, the second injector and the second eddy flow absorption tower is connected on same absorbent circulation pipe successively, is connected with wireway between the top of the second circulating tank and aiutage.
Described purification method comprises the following steps:
(1) pass in surge tank by coke cooling water tank Volatile Gas, carry out initial gross separation to the oil gas in waste gas and steam, waste gas enters condenser, by condenser, EGT is cooled to less than 50 degree;
(2) waste gas enters the first injector, mix with the absorbent in the first injector, the absorbent of mix waste gas enters the first circulating tank, after the first circulating tank gas-liquid separation, waste gas enters the first bottom, eddy flow absorption tower by wireway, absorbent in first circulating tank to be transported in the spray head in the first injector and the first eddy flow absorption tower by the first circulating pump by absorbent circulation pipe, after spray head ejection absorbent purifying exhaust air, absorbent flows into the first circulating tank bottom the first eddy flow absorption tower;
(3) in the first eddy flow absorption tower, entered the bottom on the second eddy flow absorption tower by wireway by the waste gas of preliminary purification, after the spray head ejection absorbent purification in the second eddy flow absorption tower, absorbent enters the second circulating tank from the bottom on the second eddy flow absorption tower, the second injector is entered by wireway by the waste gas after spraying, and after mixing with absorbent, then the second circulating tank is entered together, after the second circulating tank is by gas-liquid separation, discharge from aiutage through purified gas, absorbent in second circulating tank to be transported to the spray head in the second injector and the second eddy flow absorption tower by absorbent circulation pipe by the second circulating pump.
Technique effect of the present invention is: the present invention guarantees that odor pollution is administered rear concentration of emission and reached " odor pollution discharge standard " (GB14554-1993).Adopt advanced technology, economically viable treatment process, make that flow process is simple, easy to operate as far as possible, elasticity is large, cost saving and processing cost.Efficiently, energy-conservation, safe and reliable, and make convenient operating maintenance, long service life, make every effort to facility compact and arrange, reduce plant area area.Select the post-processing approach of technique highly versatile, avoid bringing secondary pollution.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention.
In the drawings, 1, surge tank 2, condenser 3, first injector 4, first eddy flow absorption tower 5, spray head 6, second eddy flow absorption tower 7, second injector 8, aiutage 9, second circulating pump 10, second circulating tank 11, first circulating pump 12, first circulating tank 13, absorbent circulation pipe 14, wireway.
Detailed description of the invention
As shown in Figure 1, for the purifier that petrochemical industry coke cooling water tank Volatile Gas is administered, it comprises surge tank 1, condenser 2, first injector 3, first eddy flow absorption tower 4, spray head 5, second eddy flow absorption tower 6, second injector 7, aiutage 8, second circulating pump 9, second circulating tank 10, first circulating pump 11, first circulating tank 12, wireway 14 and absorbent circulation pipe 13, its design feature is the bottom of the top connection condenser 2 of surge tank 1, the top of condenser 2 connects the first injector 3, the bottom of the first injector 3 is connected with the bottom on the first eddy flow absorption tower 4 and the top of the first circulating tank 12 respectively, the top of the first circulating tank 12 is connected to the lower wall on the first eddy flow absorption tower 4 by wireway 14, spray head 5 in first eddy flow absorption tower 4 connects the first circulating tank 12 and the first injector 3 respectively by absorbent circulation pipe 13, spray head 5 in first eddy flow absorption tower 4 and the absorbent circulation pipe 13 between the first circulating tank 12 are connected with the first circulating pump 11,
Wireway 14 is connected with between the top on the first eddy flow absorption tower 4 and the second eddy flow absorption tower 6 lower wall;
The bottom on the second eddy flow absorption tower 6 connects the bottom of the second injector 7 and the top of the second circulating tank 10 respectively, the top on the second eddy flow absorption tower 6 connects the second injector 7 by wireway 14, spray head 5 in second circulating tank 10, second injector 7 and the second eddy flow absorption tower 6 is connected on same absorbent circulation pipe 13 successively, is connected with wireway 14 between the top of the second circulating tank 10 and aiutage 8.
Described purification method comprises the following steps:
(1) pass in surge tank 1 by coke cooling water tank Volatile Gas, carry out initial gross separation to the oil gas in waste gas and steam, waste gas enters condenser 2, by condenser 2, EGT is cooled to less than 50 degree;
(2) waste gas enters the first injector 3, mix with the absorbent in the first injector 3, the absorbent of mix waste gas enters the first circulating tank 12, after the first circulating tank 12 gas-liquid separation, waste gas enters the first bottom, eddy flow absorption tower 4 by wireway 14, absorbent in first circulating tank 12 to be transported in the spray head 5 in the first injector 3 and the first eddy flow absorption tower 4 by the first circulating pump 11 by absorbent circulation pipe 13, after spray head 5 sprays absorbent purifying exhaust air, absorbent flows into the first circulating tank 12 bottom the first eddy flow absorption tower 4;
(3) in the first eddy flow absorption tower 4, entered the bottom on the second eddy flow absorption tower 6 by wireway 14 by the waste gas of preliminary purification, after being sprayed absorbent purification by the spray head 5 in the second eddy flow absorption tower 6, absorbent enters the second circulating tank 10 from the bottom on the second eddy flow absorption tower 6, the second injector 7 is entered by wireway 14 by the waste gas after spraying, and after mixing with absorbent, then the second circulating tank 10 is entered together, after the second circulating tank 10 is by gas-liquid separation, discharge from aiutage 8 through purified gas, absorbent in second circulating tank 10 to be transported to the spray head 5 in the second injector 7 and the second eddy flow absorption tower 6 by absorbent circulation pipe 13 by the second circulating pump 9,
The key reaction formula of foul waste gas in purifier is as follows:
CH
3SO
3H→（CH
3）
2S
2
H
2S+2NaOH→Na
2S+2H
2O
CH
3SH+NaOH→CH
3SNa
2+H2O
(CH
3)S+3NaOCl→(CH
3)
2SO
3+NaCl
(CH
3)
2S
2+5NaOCl→2CH
3SO
3H+5NaCl
After foul waste gas process after the present invention's purification, concentration of emission reaches " odor pollution discharge standard " (GB14554-1993), and aiutage height is in 15 meters, and emission standard for odor pollutants value sees the following form (kg/h):
| Pollutant kind | Hydrogen sulfide | Methyl mercaptan | Methyl sulfide | Methyl disulfide | Ammonia |
| Discharge standard (kg/h) | 0.33 | 0.04 | 0.33 | 0.43 | 4.9 |
Hydrogen sulfide removal rate is greater than 95%, and methyl mercaptan clearance is greater than 90%, and other organic sulfur clearance is greater than 80%.
The invention process feature is:
(1) absorbent adopts ZJK-006 high-efficiency absorbent.ZJK-006 high-efficiency absorbent is the proprietary absorbent of volatility gases containing stench sulphureous gases of function admirable.The foul waste gas being widely used in the factories such as oil refining, chemical industry, natural gas is administered.Especially purge foul waste gas etc. because of complexity of its composition, the uncertainty of concentration tolerance for the various storage tank breathing waste gas of oil-refining chemical, pipeline, this absorbent more demonstrates its excellent performance.This absorbent is the high-efficiency absorbent that with the addition of the plurality of active ingredients such as oxidant, catalyst, activating agent, multiple desulfurizing agent and cosolvent in two kinds of alkali lye.(in about one year service life of absorbent, useless absorbent can go sour water tank to enter stripper, can improve stripper deamination effect, makes fixed ammonia in sewage become free ammonia.）
(2) have employed gas-liquid separator and remove oily substance, and use multi-stage, efficient combination rotating stream tray scrubber absorption plant, the means such as the abundant mixing of injection improve the absorption efficiency to sulfur-containing foul material, ensure that treatment effect.
(3) security of system process capacity and Water Tank system is taken into full account in technological design.
(4) in order to reduce maintenance workload and increase the service life, the equipment such as absorption tower adopt anti-corrosion measure.
(5) system is by fire-proof and explosion-proof design.
Purifier capital equipment illustrates:
(1) eddy flow absorption tower
Because the absorption reaction of sulfur-containing foul material is relatively slow, adopt the absorption tower of polylith spiral board and the combination of demist plate can extend the time of contact of gas-liquid two-phase.Rotating stream tray scrubber has the features such as operating flexibility is large, SR is little.Some eddy flow baffles are furnished with up and down in tower, gas enters absorption tower by air inlet pipe from tower undercutting line and rotates rising, absorbing liquid is beaten to tower top by pump and is sprayed downwards, gas by during baffle step by step repeatedly with absorbing liquid haptoreaction, reaction can be made comparatively thoroughly completely.
Rotating stream tray scrubber design parameter is:
(2) injector
The principle of injector utilizes liquid stream to cause parital vacuum to introduce gas by special trunnion at a high speed to mix with liquid, therefore can be used as air flow power on the one hand, gas-liquid can be made fully to contact on the other hand, play pre-absorption effect.
Injector parameter is:
Final vacuum: 0.0993Mpa
Maximum rate of air sucked in required: 300m
3/ h
Resistance: < 2000pa
(3) surge tank
Surge tank is used for steady air flow and the mist of oil be separated in waste gas, to reduce the impact on subsequent handling.It utilizes the principle of centrifugal force and inertial collision to be separated mist of oil.
Surge tank appearance and size is: DN1800 × 2400mm
(4) cooler
Vertical (type) condenser, carbon steel, nonstandard, specification DN500 × 3500.
(5) circulating pump
Adopt magnetically-actuated polytetrafluoroethylene (PTFE) pump.Magnetically-actuated, without the need to shaft seal, is stopped a leak, inner liner polytetrafluoroethylene.Circulating pump two leaves two standby, quantity totally four.
Claims (2)
1. for purifier and the purification method thereof of the improvement of petrochemical industry coke cooling water tank Volatile Gas, it comprises surge tank, condenser, first injector, first eddy flow absorption tower, spray head, second eddy flow absorption tower, second injector, aiutage, second circulating pump, second circulating tank, first circulating pump, first circulating tank, wireway and absorbent circulation pipe, it is characterized in that, the top of surge tank connects the bottom of condenser, the top of condenser connects the first injector, the bottom of the first injector is connected with the bottom on the first eddy flow absorption tower and the top of the first circulating tank respectively, the top of the first circulating tank is connected to the lower wall on the first eddy flow absorption tower by wireway, spray head in first eddy flow absorption tower connects the first circulating tank and the first injector respectively by absorbent circulation pipe, spray head in first eddy flow absorption tower and the absorbent circulation pipe between the first circulating tank are connected with the first circulating pump,
Wireway is connected with between the top on the first eddy flow absorption tower and the second eddy flow absorption tower lower wall;
The bottom on the second eddy flow absorption tower connects the bottom of the second injector and the top of the second circulating tank respectively, the top on the second eddy flow absorption tower connects the second injector by wireway, spray head in second circulating tank, the second injector and the second eddy flow absorption tower is connected on same absorbent circulation pipe successively, is connected with wireway between the top of the second circulating tank and aiutage.
2., as claimed in claim 1 for the purification method of the purifier of petrochemical industry coke cooling water tank Volatile Gas improvement, it is characterized in that, described purification method comprises the following steps:
(1) pass in surge tank by coke cooling water tank Volatile Gas, carry out initial gross separation to the oil gas in waste gas and steam, waste gas enters condenser, by condenser, EGT is cooled to less than 50 degree;
(2) waste gas enters the first injector, mix with the absorbent in the first injector, the absorbent of mix waste gas enters the first circulating tank, after the first circulating tank gas-liquid separation, waste gas enters the first bottom, eddy flow absorption tower by wireway, absorbent in first circulating tank to be transported in the spray head in the first injector and the first eddy flow absorption tower by the first circulating pump by absorbent circulation pipe, after spray head ejection absorbent purifying exhaust air, absorbent flows into the first circulating tank bottom the first eddy flow absorption tower;
(3) in the first eddy flow absorption tower, entered the bottom on the second eddy flow absorption tower by wireway by the waste gas of preliminary purification, after the spray head ejection absorbent purification in the second eddy flow absorption tower, absorbent enters the second circulating tank from the bottom on the second eddy flow absorption tower, the second injector is entered by wireway by the waste gas after spraying, and after mixing with absorbent, then the second circulating tank is entered together, after the second circulating tank is by gas-liquid separation, discharge from aiutage through purified gas, absorbent in second circulating tank to be transported to the spray head in the second injector and the second eddy flow absorption tower by absorbent circulation pipe by the second circulating pump.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310643646.7A CN104667726A (en) | 2013-12-03 | 2013-12-03 | Device and method for purifying in treatment of volatile gas of petrochemical coke cooling water tank |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310643646.7A CN104667726A (en) | 2013-12-03 | 2013-12-03 | Device and method for purifying in treatment of volatile gas of petrochemical coke cooling water tank |
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| Publication Number | Publication Date |
|---|---|
| CN104667726A true CN104667726A (en) | 2015-06-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105126530A (en) * | 2015-09-22 | 2015-12-09 | 中石化宁波工程有限公司 | Coking exhaust gas purification method |
| CN105169879A (en) * | 2015-09-22 | 2015-12-23 | 中石化宁波工程有限公司 | Coked tail gas processing method |
| CN105999756A (en) * | 2016-07-08 | 2016-10-12 | 北京沃太斯环保科技发展有限公司 | Movable petrochemical enterprise shutdown gas-sweeping processing device and process |
| CN106731617A (en) * | 2016-06-30 | 2017-05-31 | 华东理工大学 | A kind of cold burnt foul waste gas of coking plant process complete method and apparatus |
-
2013
- 2013-12-03 CN CN201310643646.7A patent/CN104667726A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105126530A (en) * | 2015-09-22 | 2015-12-09 | 中石化宁波工程有限公司 | Coking exhaust gas purification method |
| CN105169879A (en) * | 2015-09-22 | 2015-12-23 | 中石化宁波工程有限公司 | Coked tail gas processing method |
| CN105126530B (en) * | 2015-09-22 | 2017-09-12 | 中石化宁波工程有限公司 | A kind of coking exhaust purifying method |
| CN106731617A (en) * | 2016-06-30 | 2017-05-31 | 华东理工大学 | A kind of cold burnt foul waste gas of coking plant process complete method and apparatus |
| CN105999756A (en) * | 2016-07-08 | 2016-10-12 | 北京沃太斯环保科技发展有限公司 | Movable petrochemical enterprise shutdown gas-sweeping processing device and process |
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Application publication date: 20150603 |