CN219722397U - Comprehensive treatment system for VOCs waste gas in oil tank area - Google Patents
Comprehensive treatment system for VOCs waste gas in oil tank area Download PDFInfo
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- CN219722397U CN219722397U CN202321091684.1U CN202321091684U CN219722397U CN 219722397 U CN219722397 U CN 219722397U CN 202321091684 U CN202321091684 U CN 202321091684U CN 219722397 U CN219722397 U CN 219722397U
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- carbon adsorption
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- 239000002912 waste gas Substances 0.000 title claims abstract description 28
- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 27
- 239000007789 gas Substances 0.000 claims abstract description 82
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 44
- 238000001179 sorption measurement Methods 0.000 claims abstract description 44
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 22
- 238000007789 sealing Methods 0.000 claims abstract description 21
- 238000000926 separation method Methods 0.000 claims abstract description 17
- 238000007667 floating Methods 0.000 claims abstract description 12
- 238000009833 condensation Methods 0.000 claims abstract description 9
- 230000005494 condensation Effects 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 238000003795 desorption Methods 0.000 claims abstract description 6
- 238000005338 heat storage Methods 0.000 claims abstract description 6
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 12
- 238000011084 recovery Methods 0.000 claims description 10
- 239000004215 Carbon black (E152) Substances 0.000 claims description 7
- 229930195733 hydrocarbon Natural products 0.000 claims description 7
- 150000002430 hydrocarbons Chemical class 0.000 claims description 7
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- 239000007791 liquid phase Substances 0.000 claims description 5
- 239000012071 phase Substances 0.000 claims description 5
- 230000007613 environmental effect Effects 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 3
- 230000008901 benefit Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000003344 environmental pollutant Substances 0.000 description 4
- 231100000719 pollutant Toxicity 0.000 description 4
- 238000009825 accumulation Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 238000004064 recycling Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005474 detonation Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 239000003063 flame retardant Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000005504 petroleum refining Methods 0.000 description 1
- -1 polytetrafluoroethylene Polymers 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 238000000197 pyrolysis Methods 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 238000007790 scraping Methods 0.000 description 1
- 238000002336 sorption--desorption measurement Methods 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Treating Waste Gases (AREA)
Abstract
The utility model relates to the technical field of collection and treatment of VOCs in an oil tank area, in particular to a comprehensive treatment system of VOCs waste gas in the oil tank area, which comprises an oil storage tank, wherein a full liquid-receiving sealing floating disc is arranged in the oil storage tank, and a fire-retarding breather valve and an emergency pressure relief manhole are arranged at the top of the oil storage tank; the oil gas collecting pipe is communicated with the gas-liquid separation tank through the oil gas collecting main pipe, and the exhaust port of the gas-liquid separation tank is communicated with the adsorption unit; the adsorption unit comprises two parallel active carbon adsorption tanks, air inlets at the bottoms of the two active carbon adsorption tanks are communicated with an air outlet of the gas-liquid separation tank, desorption liquid outlets at the bottoms of the two active carbon adsorption tanks are communicated with an inlet end of the oil-gas condensation unit, and air outlets at the tops of the two active carbon adsorption tanks are communicated with an air inlet pipe of the RTO heat storage incinerator through an air feeder and a water seal tank in sequence. The utility model recovers and processes the waste gas at the top of the oil tank, saves energy, has low investment and running cost and meets the environmental protection emission requirement.
Description
Technical Field
The utility model relates to the technical field of collection and treatment of VOCs in oil tank areas, in particular to a comprehensive treatment system for VOCs waste gas in oil tank areas.
Background
Along with the great trend of environmental protection, clear requirements are provided for VOCs treatment of petrochemical enterprises, and enterprise pollutant emission limit values and factory boundary emission, such as GB 31570-2015 "emission standards for pollutants in petroleum refining industry" and GB 31571-2015 "emission standards for pollutants in petrochemical industry". In the existing petrochemical enterprise oil tank field VOCs control treatment equipment, the traditional flame arrester breather valve and the emergency pressure release valve have the defects of the structure, intrinsic safety, poor sealing performance, large leakage amount, high nitrogen loss of a storage tank and other reasons, so that part of tank top gas phase is directly discharged to the atmosphere through the tank top breather valve or the emergency pressure release manhole, environmental pollution and material loss are caused, and the existing safety and environmental protection requirements cannot be met.
Disclosure of Invention
The utility model aims to solve the technical problems of providing the comprehensive treatment system for VOCs waste gas in the oil tank area, which is used for recycling and treating the waste gas at the top of the oil tank, saving energy, and has the advantages of small investment, low operation cost and meeting the environmental protection emission requirement.
The utility model relates to a comprehensive treatment system for VOCs waste gas in an oil tank area, which comprises an oil storage tank, wherein a full liquid-receiving sealed floating disc is arranged in the oil storage tank, a fire-retarding breather valve, an emergency pressure relief manhole and an oil gas collecting pipe are arranged at the top of the oil storage tank, and a detonation-retarding flame arrester is arranged on the oil gas collecting pipe; the system also comprises an oil gas recovery system, wherein the oil gas recovery system comprises a gas-liquid separation tank and an activated carbon adsorption tank, the oil gas collection pipe is communicated with the gas-liquid separation tank through an oil gas collection main pipe, and an exhaust port of the gas-liquid separation tank is communicated with the adsorption unit; the adsorption unit comprises two parallel active carbon adsorption tanks, air inlets at the bottoms of the two active carbon adsorption tanks are communicated with an air outlet of the gas-liquid separation tank, desorption liquid outlets at the bottoms of the two active carbon adsorption tanks are communicated with an inlet end of the oil-gas condensation unit, a non-condensable gas outlet of the oil-gas condensation unit is communicated with an air inlet at the bottom of the active carbon adsorption tank, and air outlets at the tops of the two active carbon adsorption tanks are communicated with an air inlet pipe of the RTO heat storage incinerator sequentially through an air feeder and a water seal tank.
Preferably, a double-seal type seal is adopted between the full liquid-receiving seal floating disc and the oil product storage tank.
Preferably, the top of the oil product storage tank is provided with a nitrogen sealing device.
Preferably, a fan is arranged on the oil gas collecting main pipe, and the fan is a Roots fan
Preferably, the oil gas condensing unit comprises a primary oil gas condenser, a secondary oil gas condenser and a tertiary oil gas condenser which are sequentially connected.
Preferably, a plurality of blowers are provided, and the plurality of blowers are arranged in parallel.
Preferably, an outer chimney is arranged on a connecting pipeline between the blower and the water-sealed tank.
Preferably, a total hydrocarbon analyzer is arranged between the activated carbon adsorption tank and the blower.
Preferably, the RTO thermal storage incinerator is a three-compartment RTO thermal storage incinerator.
Preferably, the liquid phase outlet of the oil-gas condensing unit is connected with the finished product tank, and the gas phase outlet of the oil-gas condensing unit is connected with the gas inlet at the bottom of the activated carbon adsorption tank.
The pipeline can be provided with a valve according to the control requirement, and the on-off of materials in the corresponding pipeline and the flow of the materials are conveniently controlled through the opening and closing of the valve.
Compared with the prior art, the utility model has the beneficial effects that: the source and tail end treatment are combined, and the fully-connected liquid sealing floating disc and the top of the tank are added with nitrogen sealing facilities, so that the VOCs emission of the oil tank can be effectively reduced; the VOCs are collected and then subjected to waste gas recovery treatment through an adsorption and oil gas condensation unit, so that energy sources are saved, and resource waste is avoided; the treated waste gas is burnt by RTO, the operation cost is low, and the environmental protection emission requirement is met; the utility model recovers and processes the waste gas at the top of the oil product storage tank, saves energy, has small investment and low operation cost and meets the environmental protection emission requirement.
Drawings
FIG. 1 is a schematic diagram of the oil tank farm structure of the present utility model;
FIG. 2 is a schematic diagram of the oil storage tank structure of the utility model;
FIG. 3 is a schematic diagram of the structure of the oil and gas recovery system according to the present utility model;
FIG. 4 is a schematic diagram of the structure of an RTO heat accumulating incinerator in the utility model;
in the figure: 1. an oil storage tank; 11. full liquid-receiving sealing floating disc; 12. fire-retardant breather valve; 13. an emergency pressure relief manhole; 14. an oil gas collecting pipe; 15. detonation-resistant flame arresters; 16. an oil gas collecting main pipe; 21. a blower; 22. a gas-liquid separation tank; 221. an exhaust port; 23. an activated carbon adsorption tank; 231. a desorption liquid outlet; 232. an air outlet; 24. an oil gas condensing unit; 241. a non-condensable gas outlet; 25. a water sealed tank; 26. an exhaust chimney; 27. total hydrocarbon analyzer; 28. a finished product tank; 3. RTO heat accumulation incinerator.
Detailed Description
The present utility model will now be described more fully hereinafter with reference to the accompanying drawings.
As shown in fig. 1, 2 and 3, the comprehensive treatment system for VOCs waste gas in an oil tank area comprises an oil storage tank 1, wherein a full liquid-receiving sealing floating disc 11 is arranged in the oil storage tank 1, a fire-retarding breathing valve 12, an emergency pressure relief manhole 13 and an oil gas collecting pipe 14 are arranged at the top of the oil storage tank 1, and a detonation-retarding flame arrester 15 is arranged on the oil gas collecting pipe 14; the system also comprises an oil gas recovery system, wherein the oil gas recovery system comprises a gas-liquid separation tank 22 and an activated carbon adsorption tank 23, the oil gas collecting pipe 14 is communicated with the gas-liquid separation tank 22 through the oil gas collecting main pipe 16, and an exhaust port 221 of the gas-liquid separation tank 22 is communicated with the adsorption unit; the adsorption unit comprises two parallel active carbon adsorption tanks 23, air inlets at the bottoms of the two active carbon adsorption tanks 23 are communicated with an air outlet 221 of the gas-liquid separation tank 22, desorption liquid outlets 231 at the bottoms of the two active carbon adsorption tanks 23 are communicated with the inlet end of the oil-gas condensation unit 24, a non-condensable gas outlet 241 of the oil-gas condensation unit 24 is communicated with the bottom air inlet of the active carbon adsorption tank 23, and air outlets 232 at the tops of the two active carbon adsorption tanks 23 are communicated with an air inlet pipe of the RTO heat storage incinerator 3 sequentially through an air feeder and a water seal tank 25.
The full liquid-receiving sealing floating disc 11 and the oil product storage tank 1 are sealed by double sealing, a stainless steel inner floating roof and a double-layer large compensation elastic sealing ring are arranged, and a polytetrafluoroethylene film is arranged on a tongue-shaped scraping plate of the sealing ring, so that the performances of static electricity resistance, flame retardance, permeation resistance, corrosion resistance, ageing resistance and abrasion resistance are met; the sealing pressure between the double-layer large-compensation elastic sealing ring and the inner wall of the oil storage tank 1 is moderate, so that the sealing tightness between the edge sealing and the inner wall of the oil storage tank 1 is ensured all the time, the flexible state that the full-liquid-receiving sealing floating disc 11 runs up and down all the time is ensured, the chuck phenomenon is prevented, and the discharge amount of VOCs of the oil storage tank 1 can be effectively reduced.
The air blower 21 is arranged on the oil gas collecting main pipe 16, and the air blower 21 is a Roots blower.
The top of the oil product storage tank 1 is provided with a nitrogen sealing device.
The oil-gas condensing unit 24 includes a primary oil-gas condenser, a secondary oil-gas condenser, and a tertiary oil-gas condenser connected in sequence.
As shown in fig. 3, a plurality of blowers are provided, and the plurality of blowers are provided in parallel. An exhaust chimney 26 is arranged on the connecting pipeline between the blower and the water-sealed tank 25. A total hydrocarbon analyzer 27 is provided between the activated carbon canister 23 and the blower.
As shown in fig. 4, the RTO thermal storage incinerator 3 is a three-compartment RTO thermal storage incinerator.
The liquid phase outlet of the oil-gas condensing unit 24 is connected with the finished product tank 28, and the gas phase outlet of the oil-gas condensing unit 24 is connected with the gas inlet at the bottom of the activated carbon adsorption tank 23.
The working process is as follows: the thermocouple, the remote cut-off valve, the oxygen analyzer and the nitrogen flowmeter are added on the oil gas collecting pipe 14, and the full liquid receiving sealing floating disc 11 in the oil product storage tank 1 can effectively reduce the escape of the gas phase at the tank top into the atmosphere, thereby improving the operating environment of operators, reducing the pollution to the atmosphere environment and having important environmental protection benefit and social benefit.
VOCs waste gas in the oil gas collecting pipe 14 is introduced into an oil gas recovery system through a fan 21, and after liquid phase is separated by a gas-liquid separation tank 22, the VOCs waste gas firstly enters an adsorption unit consisting of two parallel active carbon adsorption tanks 23, and the active carbon adsorption tanks 23 are subjected to desorption treatment after adsorbing oil gas, and the two active carbon adsorption tanks 23 can alternately perform adsorption-desorption, so that the working efficiency is improved; the desorbed oil gas is cooled by a condenser and then is sent into an oil gas condensing unit 24 through a buffer tank, the oil gas is cooled to 5 ℃ by a primary oil gas condenser, more than 80% of water and more than 20% of hydrocarbon in the oil gas are removed, the oil gas is cooled to-25 to-30 ℃ by the primary oil gas condenser, more than 60% of hydrocarbon in the oil gas is removed, the oil gas is cooled to below-74 ℃ by the primary oil gas condenser, most of hydrocarbon is removed, and the condensed noncondensable gas enters an adsorption unit again; the condensed liquid phase gasoline is recovered to a finished tank 28 and sent to the gasoline tank by a pump. The tail gas treated by the adsorption and condensation oil gas recovery system is sent to the RTO heat accumulation incinerator 3 through an air outlet at the top of the activated carbon adsorption tank 23;
the RTO heat accumulation incinerator 3 is a VOCS treatment device with high efficiency, high income and low cost, the treatment efficiency is up to 99 percent, good economic benefit and social benefit are achieved, and the requirement of environmental protection in a new period is met; the specific working principle of the RTO heat storage incinerator 3 is that organic matters in the waste gas are subjected to high-temperature oxidation reaction at a high temperature environment of more than 750 ℃ and a retention time of more than or equal to 1.0sec to react with O 2 The pyrolysis reaction is carried out to produce harmless carbon dioxide and water, thereby achieving the aim of removing pollutants, purifying waste gas, recycling heat released during the decomposition of the waste gas, and the waste gas is burnt by an RTO heat storage incinerator and then discharged up to the standard, and the VOCs is less than 20mg/m 3 。
Claims (10)
1. The comprehensive treatment system for VOCs waste gas in the oil tank field is characterized by comprising an oil storage tank (1), wherein a full liquid receiving sealing floating disc (11) is arranged in the oil storage tank (1), a fire-retarding breather valve (12), an emergency pressure relief manhole (13) and an oil gas collecting pipe (14) are arranged at the top of the oil storage tank (1), and a detonation-retarding flame arrester (15) is arranged on the oil gas collecting pipe (14); the system also comprises an oil gas recovery system, wherein the oil gas recovery system comprises a gas-liquid separation tank (22) and an activated carbon adsorption tank (23), the oil gas collection pipe (14) is communicated with the gas-liquid separation tank (22) through an oil gas collection main pipe (16), and an exhaust port (221) of the gas-liquid separation tank (22) is communicated with the adsorption unit; the adsorption unit comprises two parallel active carbon adsorption tanks (23), air inlets at the bottoms of the two active carbon adsorption tanks (23) are all communicated with an exhaust port (221) of a gas-liquid separation tank (22), desorption liquid outlets (231) at the bottoms of the two active carbon adsorption tanks (23) are all communicated with an inlet end of an oil-gas condensation unit (24), a non-condensable gas outlet (241) of the oil-gas condensation unit (24) is communicated with an air inlet at the bottom of the active carbon adsorption tank (23), and air outlets (232) at the tops of the two active carbon adsorption tanks (23) are sequentially communicated with an air inlet pipe of an RTO heat storage incinerator (3) through an air feeder and a water seal tank (25).
2. The comprehensive treatment system for VOCs waste gas in oil tank farm according to claim 1, wherein a double seal type seal is adopted between the full liquid-receiving sealing floating disc (11) and the oil storage tank (1).
3. The comprehensive treatment system for VOCs waste gas in oil tank farm according to claim 1, wherein the top of the oil tank (1) is provided with a nitrogen sealing device.
4. The comprehensive treatment system for VOCs waste gas in oil tank areas according to claim 1, wherein a fan (21) is arranged on the oil gas collecting main pipe (16), and the fan (21) is a Roots fan.
5. The oil tank farm VOCs waste gas integrated treatment system according to claim 1, wherein the oil gas condensing unit (24) comprises a primary oil gas condenser, a secondary oil gas condenser and a tertiary oil gas condenser connected in sequence.
6. The comprehensive treatment system for VOCs waste gas in oil tank farm according to claim 1, wherein a plurality of blowers are provided, and a plurality of blowers are arranged in parallel.
7. The comprehensive treatment system for VOCs waste gas in oil tank farm according to claim 1, wherein an exhaust chimney (26) is arranged on the connecting pipeline between the blower and the water-sealed tank (25).
8. The comprehensive treatment system for VOCs waste gas in oil tank farm according to claim 1, wherein a total hydrocarbon analyzer (27) is arranged between the activated carbon adsorption tank (23) and the blower.
9. The comprehensive treatment system for VOCs waste gas in oil tank areas according to claim 1, wherein the RTO thermal storage incinerator (3) is a three-chamber RTO thermal storage incinerator.
10. The comprehensive treatment system for VOCs waste gas in oil tank farm according to claim 1, wherein the liquid phase outlet of the oil gas condensing unit (24) is connected with the finished product tank (28), and the gas phase outlet of the oil gas condensing unit (24) is connected with the gas inlet at the bottom of the activated carbon adsorption tank (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321091684.1U CN219722397U (en) | 2023-05-09 | 2023-05-09 | Comprehensive treatment system for VOCs waste gas in oil tank area |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321091684.1U CN219722397U (en) | 2023-05-09 | 2023-05-09 | Comprehensive treatment system for VOCs waste gas in oil tank area |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219722397U true CN219722397U (en) | 2023-09-22 |
Family
ID=88025179
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321091684.1U Active CN219722397U (en) | 2023-05-09 | 2023-05-09 | Comprehensive treatment system for VOCs waste gas in oil tank area |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219722397U (en) |
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2023
- 2023-05-09 CN CN202321091684.1U patent/CN219722397U/en active Active
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