CN111762832B - VOC (volatile organic compound) reduction treatment device and method for open sewage tank - Google Patents
VOC (volatile organic compound) reduction treatment device and method for open sewage tank Download PDFInfo
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- CN111762832B CN111762832B CN202010624786.XA CN202010624786A CN111762832B CN 111762832 B CN111762832 B CN 111762832B CN 202010624786 A CN202010624786 A CN 202010624786A CN 111762832 B CN111762832 B CN 111762832B
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- 239000012855 volatile organic compound Substances 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000009467 reduction Effects 0.000 title claims abstract description 14
- 239000010865 sewage Substances 0.000 title claims description 22
- 238000007599 discharging Methods 0.000 claims abstract description 49
- 239000000463 material Substances 0.000 claims abstract description 35
- 238000005192 partition Methods 0.000 claims abstract description 33
- 238000002309 gasification Methods 0.000 claims abstract description 31
- 238000000926 separation method Methods 0.000 claims abstract description 26
- 238000003860 storage Methods 0.000 claims abstract description 25
- 238000011084 recovery Methods 0.000 claims abstract description 20
- 239000003921 oil Substances 0.000 claims description 86
- 238000001704 evaporation Methods 0.000 claims description 38
- 230000008020 evaporation Effects 0.000 claims description 38
- 230000000087 stabilizing effect Effects 0.000 claims description 34
- 230000007246 mechanism Effects 0.000 claims description 30
- 238000010438 heat treatment Methods 0.000 claims description 28
- 239000007788 liquid Substances 0.000 claims description 22
- 239000007791 liquid phase Substances 0.000 claims description 18
- 239000012071 phase Substances 0.000 claims description 12
- 239000000341 volatile oil Substances 0.000 claims description 10
- 239000003595 mist Substances 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 238000000605 extraction Methods 0.000 claims description 6
- 229920006395 saturated elastomer Polymers 0.000 claims description 5
- 238000012545 processing Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 239000003208 petroleum Substances 0.000 abstract description 5
- 239000007789 gas Substances 0.000 description 36
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 6
- 230000008569 process Effects 0.000 description 6
- 230000008901 benefit Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000003912 environmental pollution Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000000779 smoke Substances 0.000 description 3
- 239000002912 waste gas Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 239000003345 natural gas Substances 0.000 description 2
- 238000002407 reforming Methods 0.000 description 2
- 239000003981 vehicle Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000011152 fibreglass Substances 0.000 description 1
- 238000005243 fluidization Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000346 nonvolatile oil Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000011272 standard treatment Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/10—Nature of the water, waste water, sewage or sludge to be treated from quarries or from mining activities
-
- 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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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Organic Chemistry (AREA)
- Physical Water Treatments (AREA)
Abstract
The invention belongs to the technical field of petroleum exploitation, and particularly relates to an open sump oil tank VOC (volatile organic compound) reduction treatment device and method, wherein the device comprises a gasification device, an open sump, a VOC recovery device, a sump oil lifting pump and a partition wall; a partition wall is arranged in the open pond and divides the open pond into a storage pond and an oil separation pond; one side of the gasification device is communicated with the feed pipe, the top is connected with the VOC recovery device through the air outlet pipe, the bottom is connected with the discharging main pipe, the discharging main pipe is connected with two discharging branch pipes, and the two discharging branch pipes are respectively led into the storage tank and the oil separation tank; the oil separation tank is connected with the feed pipe through a return pipe; the return pipe is provided with a dirty oil lifting pump; according to the invention, through the arrangement of the feeding pipe, the conveying pipe, the discharging main pipe and the discharging branch pipe, flexible switching of VOC reduction of various materials can be realized; the gasification device with a special structure is adopted for treatment, so that dirty oil and the like entering an open pond do not volatilize oil gas under normal temperature and normal pressure, and VOC is reduced from the source.
Description
Technical Field
The invention belongs to the technical field of petroleum exploitation, and particularly relates to an open sump VOC (volatile organic compound) reduction treatment device and method.
Background
A large number of open ponds inevitably exist in the petroleum exploitation process, oily sewage, pollution discharge waste liquid, oil sludge and the like in each production link are accepted, volatile oil gas is easily volatilized, and the volatile organic compound VOC (volatileorganic compounds) is discharged to the atmosphere in an unorganized way, so that the total discharge amount of the volatile organic compound is far more than the requirements of national standards on the standard limit value of non-methane total hydrocarbons of 4mg/m < 3 >. With the continuous increase of the environmental pollution and the energy waste treatment force caused by the national energy exploitation process, the VOC emission index is controlled more and more strictly, the energy conservation and emission reduction are one of constraint indexes which are needed to be completed, and are the points of force for constructing resource-saving and environment-friendly cities.
At present, the treatment of the open dirty oil tank adopts a unified 'closed air suction' +centralized 'waste gas treatment' process. Sealing and exhausting: the glass fiber reinforced plastic is adopted for full-closed design, an elastic oil-resistant rubber sealing door and a transparent glass observation window are attached, and a rotary vane vacuum pump is used for exhausting, and the exhausting pressure is used for interlocking a breather valve. Waste gas treatment: and (3) collecting gas by the air pump for freeze adsorption treatment, and then directly discharging the gas after reaching the standard. The open pond is difficult to realize real sealing, a large amount of air is easy to mix, oil gas mixed with the air is collected in a sealed space, great potential safety hazards exist, and air replacement is needed when inspection and maintenance are carried out after sealing; the released oil gas has low pressure, small gas quantity and more impurities, and continuous, efficient and economic operation of the VOC treatment device can not be realized; because of air mixing, the treated gas can only be discharged outside in consideration of safety, and economic benefit is lost.
The method is used for treating a large amount of open dirty oil pool VOC in the petroleum exploitation process, realizing the standard emission of waste gas in the production link of the oil field according to the national policy requirement, being an important link of the clean production process of the action of green enterprises created in the oil field and being a necessary trend of long-term and durable development of energy.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, and provides a VOC reduction treatment device and method for an open sewage pool, which ensure that the VOC recovery is safe and reliable, the VOC zero emission is realized, and the environmental pollution is reduced.
The technical scheme adopted for solving the technical problems is as follows:
the VOC reduction treatment device for the open sewage oil pool comprises a gasification device, an open pool, a VOC recovery device, a sewage oil lifting pump and a partition wall; a partition wall is arranged in the open pond, the top height of the partition wall is lower than that of the open pond, the partition wall divides the open pond into a storage pond and an oil separation pond and is used for isolating the oil-containing sewage in the open pond and can also play a role in overflowing dirty oil in the oil-containing sewage to the oil separation pond; one side of the gasification device is communicated with the feeding pipe, the top of the gasification device is connected with the VOC recovery device through the air outlet pipe, the bottom of the gasification device is connected with the discharging main pipe, the discharging main pipe is connected with two discharging branch pipes, and the two discharging branch pipes are respectively led into the storage tank and the oil separation tank; the oil separation tank is connected with the feeding pipe through a return pipe; the return pipe is provided with a dirty oil lifting pump, the dirty oil lifting pump is positioned on one side of the open pond, and the feed pipe is positioned on the other side of the open pond.
Further, the feeding pipe is also connected with a conveying pipe leading to the storage tank, a bypass valve is arranged on the conveying pipe and used for adjusting the liquid amount entering the gasification device, or the non-volatile VOC material directly enters the open tank, so that the process flow is perfected.
Further, the conveying pipe is connected with a discharging branch pipe which is led into the storage tank.
Further, a control valve is arranged on the feeding pipe and the two discharging branch pipes respectively, so that feeding of the feeding pipe and discharging of the two discharging branch pipes can be controlled conveniently.
Further, the gasification device comprises a body; the body is divided into a heating cavity and a processing cavity by a partition plate; a fire cylinder and a heating coil are arranged in the heating cavity; the treatment cavity comprises a liquid phase mechanism for flash evaporation of stable materials and a gas phase mechanism for recycling oil gas in the liquid phase mechanism; the gas phase mechanism is positioned above the liquid phase mechanism and is communicated with the liquid phase mechanism; one end of the heating coil is communicated with the liquid phase mechanism.
Further, the liquid phase mechanism comprises a corrugated baffle, a flash evaporation stabilizing cavity, an overflow weir plate, a liquid collecting cavity and a valve float regulating valve; the flash evaporation stabilizing cavity is positioned at one side of the partition plate, and the height of the flash evaporation stabilizing cavity is lower than that of the body; the heating coil is communicated with the flash evaporation stabilizing cavity; the corrugated baffle is fixedly arranged on the inner wall of the body, and the lower end of the corrugated baffle extends into the flash evaporation stabilizing cavity; one side surface of the flash evaporation stabilizing cavity is an overflow weir plate, a liquid collecting cavity is arranged on one side of the overflow weir plate, which is away from the flash evaporation stabilizing cavity, and the height of the liquid collecting cavity is lower than that of the flash evaporation stabilizing cavity; the bottom of the liquid collecting cavity is connected with a first discharging pipe, one side, close to the upper end, of the liquid collecting cavity is connected with a second discharging pipe, and the first discharging pipe and the second discharging pipe are connected with a discharging main pipe through a valve float adjusting valve.
Further, the gas phase mechanism comprises a gas suction cylinder, a mist capturing net and a rotary vacuum pump; the air extraction cylinder is arranged on the body and is communicated with the cavity above the flash evaporation stabilizing cavity, and the upper end of the inner part of the air extraction cylinder is provided with a mist capturing net; the top of the air suction cylinder is connected with a pipeline provided with a rotary vacuum pump.
Further, the corrugated baffle is positioned between the partition plate and the gas phase mechanism, so that the oil gas recovery effect is ensured.
Further, the other end of the heating coil passes through the bottom of the body, and the end part is a material inlet.
Further, one end part of the fire cylinder is close to the partition plate, and the other end part of the fire cylinder penetrates through the body to be connected with the chimney, so that smoke is discharged from the chimney.
The invention also provides another technical scheme:
the VOC (volatile organic compound) reduction treatment method for the open sewage pool comprises the following steps of:
(1) Dividing the open pond into a storage pond and an oil separation pond through partition walls;
(2) Aqueous oil workflow:
releasing volatile oil gas to be fed into the open pond material through the gasification device; the saturated vapor pressure reaches 70% of the local atmospheric pressure, so that the materials can flow into the open pond, namely the non-volatile oil gas enters the open pond in a storage state, the pressure kinetic energy of the material source is fully utilized, and the treatment energy consumption is reduced;
discharging the material released with volatile oil gas into a storage tank or/and an oil separation tank through two discharge branch pipes; the released volatile oil gas is recovered through a VOC recovery device, a liquid vehicle is pulled for transportation, and the gas is driven into a natural gas system;
(3) The working flow of the oily sewage is as follows: and the stored dirty oil in the oil separation tank or the dirty oil overflowed from the storage tank to the oil separation tank from the partition wall is pumped into the gasification device by the dirty oil lifting pump to release VOC.
Compared with the prior art, the invention has the following advantages: according to the invention, through the arrangement of the feeding pipe, the conveying pipe, the discharging main pipe and the discharging branch pipe, flexible switching of VOC reduction of various materials can be realized; the gasification device with a special structure is adopted for treatment, so that dirty oil and the like entering an open pond do not volatilize oil gas at normal temperature and normal pressure, and VOC is reduced from the source. Breaking the traditional mode of closed collection and centralized treatment of VOC treatment in an open pond; the gasification device adopts the principle of heating, vacuumizing, negative-pressure flash evaporation and stabilization, so that dirty oil and the like entering an open pond release oil gas in advance, and the open pond stores non-volatile VOC emission under normal temperature and normal pressure, so that VOC is reduced from the source; the blank of a large number of VOC (volatile organic compounds) decrement gasification devices of an open sewage pool in the petroleum exploitation field is made up, the saturated vapor pressure of the sewage entering the open pool after being treated by the device reaches 70% of the local atmospheric pressure, or the saturated vapor pressure of the pure oil reaches 1atm when the pure oil is at 70 ℃ and the oily sewage is at 40 ℃; the release rate of volatile VOC is 100 percent, and the particle size of oil is less than or equal to 100 mu m. The invention can realize zero emission of the VOC entering the opening Chi Wuyou by popularization and application in oil fields.
Drawings
FIG. 1 is a schematic diagram of the principle of the main structure of the present invention;
FIG. 2 is a schematic diagram of the gasification device according to the present invention.
The device comprises a fire cylinder 1, a heating coil pipe 2, a chimney 3, a corrugated baffle 4, a flash evaporation stabilizing cavity 5, an overflow weir plate 6, a liquid collecting cavity 7, an 8 valve float regulating valve, a 9 air extracting cylinder, a 10 mist capturing net, a 11 rotary vacuum pump, a 12 body, a 13 partition plate, a 14 first discharging pipe, a 15 second discharging pipe, a 16 discharging main pipe, a 17 material inlet, a 18 gasification device, a 19 open pond, a 20VOC recovery device, a 21 dirty oil lifting pump, a 22 partition wall, a 23 storage pond, a 24 oil separating pond, a 25 feed pipe, a 26 air outlet pipe, a 27 discharging main pipe, a 28 discharging branch pipe, a 29 return pipe, a 30 conveying pipe, a 31 bypass valve and a 32 control valve.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of 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.
Example 1:
the VOC reduction treatment device for the open sump oil tank comprises a gasification device 18, an open sump 19, a VOC recovery device 20, a sump oil lift pump 21 and a partition wall 22; a partition wall 22 is arranged in the open pond 19, the top height of the partition wall 22 is lower than the top height of the open pond 19, the partition wall 22 divides the open pond 19 into a storage pond 23 and an oil separation pond 24, and the partition wall 22 is used for isolating the oil-containing sewage in the open pond 19 and can also play a role in overflowing dirty oil in the oil-containing sewage to the oil separation pond 24; one side of the gasification device 18 is communicated with a feed pipe 25, the top is connected with the VOC recovery device through an air outlet pipe 26, the bottom is connected with a discharge main pipe 27, the discharge main pipe 27 is connected with two discharge branch pipes 28, and the two discharge branch pipes 28 are respectively led into a storage tank 23 and an oil separation tank 24; the oil separation tank 24 is connected with the feed pipe 25 through a return pipe 29; the return pipe 29 is provided with a dirty oil lift pump 21, the dirty oil lift pump 21 is positioned on one side of the open pond 19, and the feed pipe 25 is positioned on the other side of the open pond 19.
In this embodiment, the feeding pipe 25 is further connected to a conveying pipe 30 leading to the storage tank 23, and a bypass valve 31 is disposed on the conveying pipe 30, where the bypass valve 31 is used to regulate the liquid amount entering the gasification device 18, or the non-volatile VOC material directly enters the open tank 19, so as to perfect the process flow.
The delivery pipe 30 in this embodiment is connected to a discharge branch 28 which opens into the reservoir 23.
In this embodiment, a control valve 32 is disposed on each of the feeding pipe 25 and the two discharging branch pipes 28, so as to control the feeding of the feeding pipe 25 and the discharging of the two discharging branch pipes 28.
The gasification device 18 of the present embodiment includes a body 12; the body 12 is divided into a heating cavity and a processing cavity by a partition plate 13; a fire tube 1 and a heating coil 2 are arranged in the heating cavity; the treatment cavity comprises a liquid phase mechanism for flash evaporation of stable materials and a gas phase mechanism for recycling oil gas in the liquid phase mechanism; the gas phase mechanism is positioned above the liquid phase mechanism and is communicated with the liquid phase mechanism; one end of the heating coil is communicated with the liquid phase mechanism.
The liquid phase mechanism comprises a corrugated baffle 4, a flash evaporation stabilizing cavity 5, an overflow weir plate 6, a liquid collecting cavity 7 and a valve float regulating valve 8; the flash evaporation stabilizing cavity 5 is positioned on one side of the baffle 13, and the height of the flash evaporation stabilizing cavity is lower than that of the body 1; the heating coil 2 is communicated with the flash evaporation stabilizing cavity 5; the corrugated baffle 4 is fixedly arranged on the inner wall of the body 1, and the lower end of the corrugated baffle extends into the flash evaporation stabilizing cavity 5; one side surface of the flash evaporation stabilizing cavity 5 is provided with an overflow weir plate 6, one side of the overflow weir plate 6, which is away from the flash evaporation stabilizing cavity 5, is provided with a liquid collecting cavity 7, and the height of the liquid collecting cavity 7 is lower than that of the flash evaporation stabilizing cavity 5; the bottom of the liquid collecting cavity 7 is connected with a first discharging pipe 14, one side, close to the upper end, of the liquid collecting cavity 7 is connected with a second discharging pipe 15, and the first discharging pipe 14 and the second discharging pipe 15 are connected with a discharging main pipe 16 through a valve float regulating valve 8.
The gas phase mechanism comprises a gas suction cylinder 9, a mist capturing net 10 and a rotary vacuum pump 11; the air extraction cylinder 9 is arranged on the body 1 and is communicated with a cavity above the flash evaporation stabilizing cavity 5, and the upper end of the inside of the air extraction cylinder is provided with a mist catching net 10; the top of the suction cylinder 9 is connected to a pipe 17 provided with a rotary vacuum pump 11.
In the embodiment, the corrugated baffle 4 is positioned between the baffle 13 and the gas phase mechanism, so as to ensure the oil gas recovery effect; the other end of the heating coil 2 passes through the bottom of the body 1, and the end part of the heating coil is provided with a material inlet 17; one end part of the fire cylinder 1 is close to the partition plate 13, and the other end part passes through the body 1 to be connected with the chimney 3, and smoke is discharged from the chimney 3; the heating coil pipe 2 is of an S-shaped design, so that the heating area is increased; the corrugated baffle 4 is vertically arranged, so that the flow state reforming of the hot materials in the flash evaporation stabilizing cavity 5 is facilitated.
Example 2:
the embodiment relates to a method for reducing VOC in an open sewage oil pool, which is implemented by the device for reducing VOC in an open sewage oil pool in embodiment 1, and comprises the following steps:
(1) Dividing the open pond 19 into a storage pond 23 and an oil separation pond 24 through a partition wall 22;
(2) Aqueous oil workflow:
releasing volatile oil gas of the material to be fed into the open pond 19 through the gasification device 18; the saturated vapor pressure reaches 70% of the local atmospheric pressure, so that the materials can flow into the open pond 19, namely the materials do not volatilize oil gas in the storage state of the open pond 19, the pressure kinetic energy of the material source is fully utilized, and the treatment energy consumption is reduced;
discharging the volatile oil gas released material into the storage tank 23 or/and the oil separation tank 24 through two discharging branch pipes 28; the released volatile oil gas is recovered through the VOC recovery device 20, the liquid vehicle is pulled and transported, and the gas is injected into a natural gas system;
specifically, dirty oil to be introduced into an open pond 19 enters a heating coil pipe 2 through a material inlet 17 of a gasification device 18 of the invention, materials in the heating coil pipe 2 are heated by a fire cylinder 1, the heated materials enter a flash evaporation stabilizing cavity 5, pure oil entering the flash evaporation stabilizing cavity 5 after heating is at 70 ℃, oily sewage is at 40 ℃, and smoke in the fire cylinder 1 is discharged from a chimney; after the hot material entering the flash evaporation stabilizing cavity 5 of the gasification device 18 is subjected to fluidization reforming through the corrugated baffle 4, the hot material enters the flash evaporation stabilizing cavity 5 to stay for 30 minutes, the stabilized material overflows into the liquid collecting cavity 7 through the overflow weir plate 6 for 20 minutes, and finally, the stabilized material is mechanically controlled through the valve float regulating valve 8 and is externally conveyed to the open pond 19; the rotary vacuum pump 11 is used for vacuumizing, a negative pressure space of-20 Pa is formed at the top of the air suction cylinder 9, the material released oil gas in the flash evaporation stabilizing cavity 5 is filtered through a 10 mist capturing net, the rotary vacuum pump 11 is used for pressurizing to 0.3MPa, the released oil gas is externally conveyed into the downstream VOC recovery device 20, so that the purpose that dirty oil and the like entering the open pond 19 are released in advance is achieved, the open pond 19 stores non-volatile VOC emission under the normal temperature and normal pressure state, and the VOC is reduced from the source; the bypass valve 31 and the two control valves 32 are used for respectively controlling the discharge of the conveying pipe 30 and the two discharge branch pipes 28; the VOC recovery device 20 adopts a device capable of recovering VOC in the prior art, and if the material contains H2S, the VOC recovery device with a S removal facility is adopted to realize simultaneous recovery of H2S and VOC;
(3) The working flow of the oily sewage is as follows: the dirty oil stored in the oil separation tank 24 or the dirty oil overflowed from the storage tank 23 to the oil separation tank 24 from the partition wall 22 is pumped into the gasification device 18 by the dirty oil lift pump 21 through the return pipe 29, and VOC is released.
The invention does not limit the execution sequence of the step (2) and the step (3), and can simultaneously execute the step (2) and the step (3), or can execute the step (2) and then execute the step (3), or can execute the step (3) and then execute the step (2), and the execution sequence of the step (2) and the step (3) is selected according to actual requirements.
The method does not seal the open pond 19, does not form a new dangerous source, does not mix air, and has high VOC recovery safety and reliability; meanwhile, the material does not volatilize oil gas, does not pollute the environment, and can be recovered together with VOC if the material contains H2S, and can be completely recovered and driven into a system for use. The invention can realize the environment-friendly standard treatment of the open dirty oil tank by popularization and application in the oil field, realize the zero emission of VOC, reduce environmental pollution, ensure the sanitation and safety of personnel around the site, and is an environment-friendly treatment method of VOC with higher economic benefit.
The foregoing embodiments are merely examples of the present invention, and the scope of the present invention includes, but is not limited to, the forms and styles of the foregoing embodiments, and any suitable changes or modifications made by those skilled in the art, which are consistent with the claims of the present invention, shall fall within the scope of the present invention.
Claims (2)
1. The utility model provides an uncovered dirty oil tank VOC reduction processing apparatus which characterized in that: comprises a gasification device, an open pond, a VOC recovery device, a dirty oil lifting pump and a partition wall; a partition wall is arranged in the open pond, the top height of the partition wall is lower than that of the open pond, and the partition wall divides the open pond into a storage pond and an oil separation pond; one side of the gasification device is communicated with the feeding pipe, the top of the gasification device is connected with the VOC recovery device through the air outlet pipe, the bottom of the gasification device is connected with the discharging main pipe, the discharging main pipe is connected with two discharging branch pipes, and the two discharging branch pipes are respectively led into the storage tank and the oil separation tank; the oil separation tank is connected with the feeding pipe through a return pipe; the return pipe is provided with a dirty oil lifting pump;
the gasification device comprises a body; the body is divided into a heating cavity and a processing cavity by a partition plate; a fire cylinder and a heating coil are arranged in the heating cavity; the treatment cavity comprises a liquid phase mechanism for flash evaporation of stable materials and a gas phase mechanism for recycling oil gas in the liquid phase mechanism; the gas phase mechanism is positioned above the liquid phase mechanism and is communicated with the liquid phase mechanism; one end of the heating coil is communicated with the liquid phase mechanism;
the feeding pipe is also connected with a conveying pipe leading to the storage tank, and a bypass valve is arranged on the conveying pipe;
the conveying pipe is connected with a discharge branch pipe which is led into the storage tank;
the feeding pipe and the two discharging branch pipes are respectively provided with a control valve;
the liquid phase mechanism comprises a corrugated baffle, a flash evaporation stabilizing cavity, an overflow weir plate, a liquid collecting cavity and a valve float regulating valve; the flash evaporation stabilizing cavity is positioned at one side of the partition plate, and the height of the flash evaporation stabilizing cavity is lower than that of the body; the heating coil is communicated with the flash evaporation stabilizing cavity; the corrugated baffle is fixedly arranged on the inner wall of the body, and the lower end of the corrugated baffle extends into the flash evaporation stabilizing cavity; one side surface of the flash evaporation stabilizing cavity is an overflow weir plate, a liquid collecting cavity is arranged on one side of the overflow weir plate, which is away from the flash evaporation stabilizing cavity, and the height of the liquid collecting cavity is lower than that of the flash evaporation stabilizing cavity; the bottom of the liquid collecting cavity is connected with a first discharging pipe, one side, close to the upper end, of the liquid collecting cavity is connected with a second discharging pipe, and the first discharging pipe and the second discharging pipe are connected with a discharging main pipe through a valve float regulating valve;
the gas phase mechanism comprises a gas suction cylinder, a mist capturing net and a rotary vacuum pump; the air extraction cylinder is arranged on the body and is communicated with the cavity above the flash evaporation stabilizing cavity, and the upper end of the inner part of the air extraction cylinder is provided with a mist capturing net; the top of the air suction cylinder is connected with a pipeline provided with a rotary vacuum pump;
the corrugated baffle is positioned between the partition plate and the gas phase mechanism;
the other end of the heating coil pipe passes through the bottom of the body, and the end part of the heating coil pipe is a material inlet; one end part of the fire cylinder is close to the partition plate, and the other end part of the fire cylinder penetrates through the body to be connected with the chimney; the heating coil is of an S-shaped design; the corrugated baffle is vertically arranged.
2. A VOC (volatile organic compound) reduction treatment method for an open sewage tank is characterized by comprising the following steps of: the method is realized by adopting the VOC reduction treatment device for the open sewage tank, which comprises the following steps:
(1) Dividing the open pond into a storage pond and an oil separation pond through partition walls;
(2) Aqueous oil workflow:
releasing volatile oil gas to be fed into the open pond material through the gasification device; the saturated vapor pressure reaches 70% of the local atmospheric pressure, and the materials can flow into an open pond;
discharging the material released with volatile oil gas into a storage tank or/and an oil separation tank through two discharge branch pipes; the released volatile oil gas is recovered through a VOC recovery device;
(3) The working flow of the oily sewage is as follows: and the stored dirty oil in the oil separation tank or the dirty oil overflowed from the storage tank to the oil separation tank from the partition wall is pumped into the gasification device by the dirty oil lifting pump to release VOC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010624786.XA CN111762832B (en) | 2020-07-01 | 2020-07-01 | VOC (volatile organic compound) reduction treatment device and method for open sewage tank |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010624786.XA CN111762832B (en) | 2020-07-01 | 2020-07-01 | VOC (volatile organic compound) reduction treatment device and method for open sewage tank |
Publications (2)
| Publication Number | Publication Date |
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| CN111762832A CN111762832A (en) | 2020-10-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018045707A1 (en) * | 2016-09-06 | 2018-03-15 | 大唐环境产业集团股份有限公司 | Water treatment device and method using waste heat from power plant |
| CN111170394A (en) * | 2018-11-13 | 2020-05-19 | 上海华畅环保设备发展有限公司 | Emission reduction method and device for volatile organic compounds in oily sewage cleaning treatment |
| CN212924462U (en) * | 2020-07-01 | 2021-04-09 | 森诺科技有限公司 | VOC (volatile organic compounds) reduction treatment device for open sump oil tank |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2018045707A1 (en) * | 2016-09-06 | 2018-03-15 | 大唐环境产业集团股份有限公司 | Water treatment device and method using waste heat from power plant |
| CN111170394A (en) * | 2018-11-13 | 2020-05-19 | 上海华畅环保设备发展有限公司 | Emission reduction method and device for volatile organic compounds in oily sewage cleaning treatment |
| CN212924462U (en) * | 2020-07-01 | 2021-04-09 | 森诺科技有限公司 | VOC (volatile organic compounds) reduction treatment device for open sump oil tank |
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