CN215901229U - Oil gas recovery processing system - Google Patents
Oil gas recovery processing system Download PDFInfo
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- CN215901229U CN215901229U CN202120952829.7U CN202120952829U CN215901229U CN 215901229 U CN215901229 U CN 215901229U CN 202120952829 U CN202120952829 U CN 202120952829U CN 215901229 U CN215901229 U CN 215901229U
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- 230000003647 oxidation Effects 0.000 claims abstract description 61
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 61
- 230000003197 catalytic effect Effects 0.000 claims abstract description 50
- 235000015097 nutrients Nutrition 0.000 claims abstract description 39
- 238000001179 sorption measurement Methods 0.000 claims abstract description 36
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- 239000007788 liquid Substances 0.000 claims abstract description 27
- 238000000265 homogenisation Methods 0.000 claims abstract description 23
- 238000005273 aeration Methods 0.000 claims abstract description 12
- 239000000945 filler Substances 0.000 claims abstract description 12
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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- Treating Waste Gases (AREA)
Abstract
The utility model discloses an oil gas recovery processing system, which comprises a cryogenic recovery system, an adsorption homogenization system and a biological catalytic oxidation system which are sequentially connected through a pipeline, wherein the cryogenic recovery system comprises a cryogenic heat exchanger A and a cryogenic heat exchanger B which are connected in parallel, and a liquid nitrogen tank, a condensate tank and a nitrogen buffer tank which are connected with the cryogenic heat exchanger A and the cryogenic heat exchanger B; the biological catalytic oxidation system comprises a biological catalytic oxidation box, and a nutrient solution spraying device and an aeration fan which are connected with the biological catalytic oxidation box, wherein biological fillers and biological bacteria attached to the biological fillers are arranged in the biological catalytic oxidation box. The system disclosed by the utility model has high safety, has no requirement on fire-proof distance, and can achieve the environment-friendly standard of oil-gas emission.
Description
Technical Field
The utility model relates to the technical field of oil gas recovery processing, in particular to an oil gas recovery processing system.
Background
Methods for controlling emissions of VOCs can be broadly divided into two categories. The first type is to remove pollutants from air by physically transferring VOCs from a gas phase to a liquid or solid phase, and includes condensation, absorption, adsorption, etc.; the second type is a destructive method, which includes high-temperature oxidation technologies such as Thermal Oxidation (TO), Regenerative Thermal Oxidation (RTO), catalytic Combustion (CO), Regenerative Catalytic Oxidation (RCO), etc., biocatalytic oxidation technologies at normal temperature and normal pressure, photo-oxidation technologies, low-temperature plasma technologies, etc.
In the recovery and treatment of high-concentration oil gas in tank areas, truck loading platforms, reaction kettles and the like in the industries of oil refining, petrifaction, synthetic resin, pharmacy and the like, because the gas flow is small and the concentration is very high, a multi-section series combined process is generally adopted, including processes combined by various physical methods, for example, patent CN101462687A discloses a movable absorption condensation and adsorption variable-frequency oil gas recovery method; patent CN102527073A discloses an adsorption-condensation composite oil gas recovery device; the patent CN104096452A provides an oil gas recovery process by a cooling oil pre-absorption adsorption method; patent CN100553740C discloses a method for recovering organic waste gas, in which organic waste gas is pretreated by a filter and a cooler, and then is adsorbed by an adsorption tank; patent CN111111410A discloses a combined industrial waste gas VOC treatment system and process, which comprises a cooling system, a chemical conversion adsorption system, a physical adsorption system, etc.; CN111036040A discloses a VOCs recycling system and a recycling process integrating condensation-adsorption; further, CN105032112A proposes an oil gas recovery system of absorption-adsorption-condensation integrated technology. The system mainly comprises four links of oil gas absorption, adsorption, desorption and condensation. The utility model discloses above-mentioned utility model has integrateed multiple physical method and has been used for oil gas recovery to handle.
However, with the increasing environmental requirements, non-methane total hydrocarbons at 120mg/m are required3Even lower below, the combination of simple physical methods is difficult to meet such stringent requirements or uneconomical. Therefore, a combined treatment process of a physical method and a thermal oxidation method is provided, and CN 206008466U discloses a novel oil gas recovery system, which comprises a primary condensing tank, a deep condensing tank, a catalytic reactor and the like; CN107469555A provides an oil gas recovery system and an oil gas recovery method, including: adsorption devices, liquid nitrogen condensing devices, catalytic oxidation furnaces and the like. The combination technology of the physical method and the thermal oxidation method can meet strict environmental protection emission requirements, but the catalytic oxidation furnace or the regenerative oxidation furnace or the direct heating furnace is open fire equipment, requires larger fire-proof spacing and has larger fire explosion risk, thereby limiting the use of the catalytic oxidation furnace or the regenerative oxidation furnace or the direct heating furnace.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problems, the utility model provides an oil gas recovery treatment system, which aims to achieve the aims of safety, no fireproof interval requirement and environment-friendly oil gas emission reaching the standard.
In order to achieve the purpose, the technical scheme of the utility model is as follows:
an oil gas recovery processing system comprises a cryogenic recovery system, an adsorption homogenization system and a biological catalytic oxidation system which are sequentially connected through pipelines, wherein the cryogenic recovery system comprises a cryogenic heat exchanger A and a cryogenic heat exchanger B which are connected in parallel, and a liquid nitrogen tank, a condensate tank and a nitrogen buffer tank which are connected with the cryogenic heat exchanger A and the cryogenic heat exchanger B; the biological catalytic oxidation system comprises a biological catalytic oxidation box, and a nutrient solution spraying device and an aeration fan which are connected with the biological catalytic oxidation box, wherein biological fillers and biological bacteria attached to the biological fillers are arranged in the biological catalytic oxidation box.
In the above scheme, the nutrient solution spraying device comprises a nutrient solution tank, a nutrient solution pump and a nutrient solution sprayer arranged at the top in the biological catalytic oxidation box, the nutrient solution tank is connected with the nutrient solution sprayer through a pipeline and the nutrient solution pump, and the bottom of the biological catalytic oxidation box is connected with the nutrient solution tank through a pipeline.
In the above scheme, set gradually stop valve, spark arrester one, pressure sensor, oil gas flowmeter and oil gas fan along the air current direction on the oil gas pipeline, desorption vacuum pump connection is between oil gas flowmeter and oil gas fan.
In the scheme, the biological catalytic oxidation box is connected with the exhaust funnel through a pipeline, and the top of the exhaust funnel is provided with a second flame arrester.
In the scheme, a temperature control device is arranged on a pipeline between the aeration fan and the biological catalytic oxidation box.
In the scheme, the condensate tank is provided with a liquid level meter.
In the scheme, the cryogenic heat exchanger A and the cryogenic heat exchanger B both adopt primary cooling, inter-cooling and cryogenic three-stage heat exchangers.
In the above scheme, the desorption vacuum pump is an explosion-proof dry type variable frequency vacuum pump, and the aeration fan is a variable frequency explosion-proof fan.
Through the technical scheme, the oil gas recovery processing system provided by the utility model has the following beneficial effects:
1. the utility model adopts three methods of deep cooling, adsorption homogenization and biological catalytic oxidation to integrate the process, which can complement the advantages of the three methods and reduce or avoid the defects and potential safety hazard problems existing in the use process of a single method.
2. The utility model takes cheap and easily obtained low-temperature liquid nitrogen as a cold source, the starting speed of the condensation operation is high, the condensation temperature is low, the low temperature of-120 to-160 ℃ can be obtained, the condensation removal effect is better than the temperature of-50 to-70 ℃ of the traditional mechanical refrigeration, and the flow of the stored liquid nitrogen can be conveniently adjusted to meet the requirement of cold quantity. The recovered oil is clean and pollution-free, can be directly recycled, and has good economical efficiency by utilizing low-price liquid nitrogen to condense and recover high-price oil.
3. The gasified nitrogen is directly recycled to be used as the nitrogen seal of the tank field, so that the cold energy and the nitrogen are fully utilized, the economy is improved, and the safety of the storage tank is improved.
4. The gas discharged after deep cooling enters an adsorption homogenization tank, the adsorbable VOC can be further removed, after adsorption saturation, a desorption vacuum pump can be started, the desorbed gas is sent to an inlet of a deep cooling recovery system, and the uncondensed materials in primary condensation can be further condensed and recovered. Meanwhile, the adsorption homogenization tank plays a role in buffering and homogenizing components and concentration, so that the concentration of the air inlet components entering the biological catalytic oxidation box is stable.
5. A small amount of cryogenic non-condensable gas and non-adsorbable VOCs components enter a biological catalytic oxidation box and are oxidized into carbon dioxide and water by oxygen in the air under the normal temperature and pressure condition under the action of microorganisms, so that secondary pollution such as nitrogen oxide, chlorohydrocarbon, dioxin and the like easily generated by a burning method can not be generated, and the requirement of fire prevention space is avoided.
6. The utility model can operate in a partial flow or complete flow mode according to the gas coming condition of oil gas, thereby saving the recovery operation cost.
7. The method is used for reducing the temperature instead of raising the temperature, the liquid nitrogen and the nitrogen are inert gases, and the biological catalytic oxidation is carried out at normal temperature and normal pressure under mild conditions, so that the safety is better compared with a high-temperature thermal oxidation method and a catalytic oxidation method.
8. Standing in the light of the current carbon peak and carbon neutralization, the present invention primarily considers the manner of recovery, rather than incineration, as well as the technique that facilitates the reduction of carbon dioxide emissions.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below.
Fig. 1 is a schematic view of an oil gas recovery processing system according to an embodiment of the present invention.
In the figure, 1, a stop valve; 2. a flame arrester I; 3. a pressure sensor; 4. an oil-gas fan; 51 a cryogenic heat exchanger A; 52 cryogenic heat exchanger B; 61 adsorbing the homogenizing tank A; 62 adsorbing the homogenizing tank B; 7. a biological catalytic oxidation box; 8. biological fillers; 9. a nutrient solution spray head; 10. an exhaust funnel; 11. a flame arrester II; 12. a liquid nitrogen tank; 13. a nitrogen buffer tank; 14. a one-way valve; 15. a condensate tank; 16. a condensate transfer pump; 17. a desorption vacuum pump; 18. a nutrient solution tank; 19. a nutrient solution pump; 20. an aeration fan; 21. a temperature control device; 22. an oil gas flow meter; 23. a liquid level meter.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The utility model provides an oil gas recovery processing system, which comprises a cryogenic recovery system, an adsorption homogenization system and a biological catalytic oxidation system which are sequentially connected through pipelines.
The front end of the cryogenic recovery system is connected with an oil gas incoming pipeline. The oil gas pipeline is provided with a stop valve 1, a flame arrester I2, a pressure sensor 3, an oil gas flowmeter 22 and an oil gas fan 4 in sequence along the direction of air flow. The pressure sensor 3 is interlocked with the rotating speed of the oil-gas fan 4. The oil gas fan 4 is a variable frequency explosion-proof fan, and the rotating speed of the oil gas fan 4 is adjusted in a variable frequency mode according to the size of the air inlet pressure, so that the air guiding quantity of the oil gas fan 4 is controlled, and the air inlet pressure is generally set to be not lower than-500 Pa (gauge pressure) and not higher than 500Pa (gauge pressure). The gas and oil flow meter 22 is used for recording the volume flow and the accumulated volume flow of the gas and oil.
The cryogenic recovery system comprises a cryogenic heat exchanger A51, a cryogenic heat exchanger B52, a liquid nitrogen tank 12, a condensate tank 15 and a nitrogen buffer tank 13, wherein the cryogenic heat exchanger A51 and the cryogenic heat exchanger B52 are connected in parallel; the tail gas outlets of the cryogenic heat exchanger A51 and the cryogenic heat exchanger B52 are connected with the inlets of an adsorption homogenization tank A61 and an adsorption homogenization tank B62, the nitrogen outlets of the cryogenic heat exchanger A51 and the cryogenic heat exchanger B52 are connected with a nitrogen buffer tank 13, the condensate outlets of the cryogenic heat exchanger A51 and the cryogenic heat exchanger B52 are connected to a condensate tank 15, and the liquid nitrogen inlet of the cryogenic heat exchanger is connected with a liquid nitrogen tank 12.
The condensate tank 15 is provided with a liquid level meter 23, and when the liquid level is detected to reach the set highest liquid level, the liquid is conveyed to the oil product storage tank through a condensate conveying pump 16. The cold source stored in the liquid nitrogen tank 12 is liquid nitrogen with the temperature of-196 ℃. The nitrogen buffer tank 13 is used for storing gasified nitrogen, and then enters the nitrogen storage tank through the one-way valve 14 for nitrogen sealing. The cryogenic heat exchanger A51 and the cryogenic heat exchanger B52 both adopt primary cooling, intermediate cooling and cryogenic three-stage heat exchangers, and the cold energy of liquid nitrogen and tail gas is fully utilized.
The adsorption homogenization system comprises an adsorption homogenization tank A61 and an adsorption homogenization tank B62 which are connected in parallel, the adsorption homogenization tank A61 and the adsorption homogenization tank B62 are connected with an oil gas incoming pipeline arranged at the front end of the cryogenic recovery system through a desorption vacuum pump 17, and the desorption vacuum pump 17 is connected between an oil gas flowmeter 22 and an oil gas fan 4; the desorption vacuum pump 17 is an explosion-proof dry variable frequency vacuum pump controlled by the internal pressure of the adsorption homogenization tank a 61 and the adsorption homogenization tank B62. The outlets of the adsorption homogenization tank A61 and the adsorption homogenization tank B62 are connected with the inlet of the biological catalytic oxidation box 7.
The biological catalytic oxidation system comprises a biological catalytic oxidation box 7, and a nutrient solution spraying device and an aeration fan 20 which are connected with the biological catalytic oxidation box, wherein biological fillers 8 and biological bacteria attached to the biological fillers 8 are arranged in the biological catalytic oxidation box 7. The biological filler 8 adopts a bionic three-dimensional silk-network filler, and has high bacterium carrying capacity, high permeability and low flow resistance. The biological bacteria are filamentous bacteria with high specific surface area suitable for low water content.
The biological catalytic oxidation box 7 adopts a standardized container type structure, can be freely combined in the horizontal direction and the vertical direction, and reduces the occupied area.
Nutrient solution spray set includes nutrient solution jar 18, nutrient solution pump 19 and sets up the nutrient solution shower nozzle 9 at top in biological catalytic oxidation case 7, and nutrient solution jar 18 passes through the pipeline, nutrient solution pump 19 connects nutrient solution shower nozzle 9, and biological catalytic oxidation case 7 bottom is through tube coupling nutrient solution jar 18, can retrieve the nutrient solution of biological catalytic oxidation case 7 bottom. Nutrient solution of the nutrient solution box is conveyed by the nutrient solution pump 19, and the nutrient solution spray head 9 is uniformly sprayed on the biological filler 8, so that the nutrient and water requirements of microorganisms are met. And the percolate at the bottom of the biological catalytic oxidation box 7 returns to the nutrient solution box.
A temperature control device 21 is arranged on a pipeline between the aeration fan 20 and the biological catalytic oxidation box 7 and is used for controlling the temperature of the biological catalytic oxidation box 7 and maintaining good biological activity. The aeration fan 20 is a variable frequency explosion-proof fan to meet the oxygen demand of microorganisms. The aeration fan 20 has a suction port from the atmosphere and an outlet port connected to the biocatalytic oxidation tank 7 for supplementing oxygen required for the biological oxidation of VOCs.
The outlet of the biological catalytic oxidation box 7 is connected with an exhaust cylinder 10 through a pipeline, the treated oil gas is discharged to the atmosphere, and the top of the exhaust cylinder 10 is provided with a second flame arrester 11.
An oil gas recovery processing method, which adopts the oil gas recovery processing system, comprises the following processes:
the on-site oil gas enters a cryogenic heat exchanger A51 or a cryogenic heat exchanger B52 through an oil gas incoming pipeline, after the temperature of liquid nitrogen is reduced, part of easily-condensed components in the oil gas are converted into liquid and enter a condensate tank 15, and then the liquid is sent to an oil product storage tank through a condensate delivery pump 16; the liquid nitrogen is gasified and then enters a nitrogen buffer tank 13, and then enters a nitrogen storage tank for nitrogen sealing; the non-condensable gas in the oil gas enters an adsorption homogenization tank A61 or an adsorption homogenization tank B62, VOCs components are further removed after adsorption of an adsorbent, and the desorbed gas is sent to an oil gas incoming pipeline for further cryogenic condensation through a desorption vacuum pump 17 after adsorption saturation; the adsorbed oil gas enters a biological catalytic oxidation box 7, the deep-cooling non-condensable gas and the non-adsorbable VOCs in the oil gas are oxidized into carbon dioxide and water by oxygen in the air under the action of microorganisms, and the purified gas reaching the standard is discharged through an exhaust funnel 10. The biological catalytic oxidation box 7 adopts a gas-liquid cocurrent mode that the flow direction of gas and nutrient solution is consistent.
The cryogenic heat exchanger A51 and the cryogenic heat exchanger B52 operate in an alternative mode of condensation and defrosting, and the stable and continuous operation of the process flow is ensured. The adsorption homogenization tank A61 or the adsorption homogenization tank B62 runs in an adsorption-desorption alternative mode, and the adsorbent saturated in adsorption is subjected to vacuum desorption regeneration, so that the stable and continuous operation of the process flow is ensured.
When the concentration of oil gas is lower and the dew point of VOCs components is higher, the standard can be reached only by adopting a cryogenic recovery system and an adsorption homogenization system, a partial flow mode can be adopted, and the oil gas does not pass through the biological catalytic oxidation box 7 so as to reduce the operation cost.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (8)
1. The oil gas recovery processing system is characterized by comprising a cryogenic recovery system, an adsorption homogenization system and a biological catalytic oxidation system which are sequentially connected through a pipeline, wherein the cryogenic recovery system comprises a cryogenic heat exchanger A and a cryogenic heat exchanger B which are connected in parallel, and a liquid nitrogen tank, a condensate tank and a nitrogen buffer tank which are connected with the cryogenic heat exchanger A and the cryogenic heat exchanger B; the biological catalytic oxidation system comprises a biological catalytic oxidation box, and a nutrient solution spraying device and an aeration fan which are connected with the biological catalytic oxidation box, wherein biological fillers and biological bacteria attached to the biological fillers are arranged in the biological catalytic oxidation box.
2. The oil and gas recovery processing system according to claim 1, wherein the nutrient solution spraying device comprises a nutrient solution tank, a nutrient solution pump and a nutrient solution nozzle arranged at the top in the biological catalytic oxidation tank, the nutrient solution tank is connected with the nutrient solution nozzle through a pipeline and the nutrient solution pump, and the bottom of the biological catalytic oxidation tank is connected with the nutrient solution tank through a pipeline.
3. The oil gas recovery processing system of claim 1, wherein the oil gas incoming pipeline is sequentially provided with a stop valve, a first flame arrester, a pressure sensor, an oil gas flowmeter and an oil gas fan along an air flow direction, and the desorption vacuum pump is connected between the oil gas flowmeter and the oil gas fan.
4. The oil and gas recovery processing system of claim 1, wherein the biocatalytic oxidation tank is connected with an exhaust funnel through a pipeline, and a second flame arrester is arranged at the top of the exhaust funnel.
5. The oil and gas recovery processing system according to claim 1, wherein a temperature control device is arranged on a pipeline between the aeration fan and the biological catalytic oxidation tank.
6. The oil and gas recovery processing system according to claim 1, wherein a liquid level meter is arranged on the condensate tank.
7. The oil and gas recovery processing system according to claim 1, wherein the cryogenic heat exchanger A and the cryogenic heat exchanger B are primary cooling, intermediate cooling and cryogenic three-stage heat exchangers.
8. The oil and gas recovery processing system according to claim 1, wherein the desorption vacuum pump is an explosion-proof dry variable frequency vacuum pump, and the aeration fan is a variable frequency explosion-proof fan.
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| CN202120952829.7U CN215901229U (en) | 2021-05-07 | 2021-05-07 | Oil gas recovery processing system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024103424A1 (en) * | 2022-11-15 | 2024-05-23 | 岳阳景嘉化工有限公司 | Cryogenic exhaust gas removal material apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2024103424A1 (en) * | 2022-11-15 | 2024-05-23 | 岳阳景嘉化工有限公司 | Cryogenic exhaust gas removal material apparatus |
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Effective date of registration: 20231128 Address after: No. C3-16, Cross border E-commerce Town, No. 88 Sancheng Road, International Lugang, Jimo District, Qingdao City, Shandong Province, 266100 Patentee after: Qingdao Jinhaisheng Petrochemical Technology Co.,Ltd. Address before: 266109 west of Zhaoyuan Road, Liuting sub district office, Chengyang District, Qingdao City, Shandong Province Patentee before: QINGDAO GOLD HISUN ENVIRONMENT PROTECTION EQUIPMENT Co.,Ltd. |