CN109270226B - Organic liquid volatilizing and treating device with controllable conditions - Google Patents
Organic liquid volatilizing and treating device with controllable conditions Download PDFInfo
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- CN109270226B CN109270226B CN201811441579.XA CN201811441579A CN109270226B CN 109270226 B CN109270226 B CN 109270226B CN 201811441579 A CN201811441579 A CN 201811441579A CN 109270226 B CN109270226 B CN 109270226B
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- 238000003860 storage Methods 0.000 claims abstract description 36
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- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 52
- 238000010438 heat treatment Methods 0.000 claims description 33
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- 229910052757 nitrogen Inorganic materials 0.000 claims description 26
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- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 claims description 3
- 238000005253 cladding Methods 0.000 claims description 2
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- 238000000034 method Methods 0.000 abstract description 24
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
- G01N33/0004—Gaseous mixtures, e.g. polluted air
- G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
- G01N33/0027—General constructional details of gas analysers, e.g. portable test equipment concerning the detector
- G01N33/0036—Specially adapted to detect a particular component
- G01N33/0047—Specially adapted to detect a particular component for organic compounds
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2202—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling
- G01N1/2214—Devices for withdrawing samples in the gaseous state involving separation of sample components during sampling by sorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/10—Inorganic adsorbents
- B01D2253/102—Carbon
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/70—Organic compounds not provided for in groups B01D2257/00 - B01D2257/602
- B01D2257/708—Volatile organic compounds V.O.C.'s
Abstract
The invention discloses a condition-controllable organic liquid volatilizing and processing device, which comprises a tank body, a temperature control device and a pressure control device; the device can also comprise an absorption device, a condensation recovery device, a membrane separation device and an activated carbon adsorption device. The invention can collect VOC emission samples for various organic liquids independently to obtain VOC source spectrums volatilized by various organic liquids, thereby avoiding interference by other VOC emission sources; the method can simulate the actual temperature and the tank pressure, and can realize the sampling of the VOC emission source spectrum of the storage tank under different conditions in four seasons, so that the collected VOC source spectrum sample accords with the actual emission condition; the invention can singly select or combine common organic gas treatment methods such as an absorption method, a condensation method, a membrane separation method, an adsorption method and the like, so that VOC species in the sampled organic gas are consistent with actual conditions, and the VOC species emission conditions of different organic liquids after volatilizing to generate gases passing through the treatment device can be distinguished.
Description
Technical Field
The invention relates to an organic liquid volatilizing and processing device, in particular to a condition-controllable organic liquid volatilizing and processing device, and belongs to the technical field of environment monitoring instruments.
Background
The petrochemical and chemical industries use a large number of storage tanks to store organic liquids, and storage tank emissions become an important source of VOCs in the atmosphere due to volatilization of the organic liquids. Because the influence of various VOC species on the atmospheric environment and the human health is different, the organic liquid stored in the storage tank is various, and the volatile VOC species and composition characteristics are different, the proportion of various VOC species discharged by various different liquids in the storage process is required to be quantified so as to determine the source spectrum characteristics of various pollution sources.
The existing storage tank VOC emission source spectrum sampling method is to collect an ambient air sample around the storage tank, however, enterprises often adopt a large number of storage tanks in the actual production process and concentrate the storage tanks in a denser area, and the area is often close to the area where a production line is located, so that the storage tank emission sample is easily affected by the emission of other storage tanks and the production line in the ambient air, and the sample cannot reflect the emission characteristic source spectrum of a specific storage tank.
The discharge of the storage tank can also be tested by adopting a bag method, namely, the discharge of the storage tank is collected by using a larger sealing bag at the outlet of a breather valve of the storage tank. However, this method only can reflect the VOC emission of the storage tank at the current ambient temperature, and cannot represent the VOC emission characteristics generated by volatilization of the organic liquid in different seasons, i.e., different temperatures.
In addition, the breather valve of storage tank is installed in the top generally, because the storage tank is general bulky, and the height is also higher, needs the sampling personnel climb to the tank deck and carries out the sampling, therefore the manpower that consumes is more, and the time is longer, can't accomplish the emission sample collection of various organic liquid storage tanks in the short period.
Part of the storage tanks are provided with oil gas recovery devices, and common technologies are an absorption method, a condensation method, a membrane separation method and an adsorption method. The emission characteristics of specific species in the VOC after oil and gas recovery are greatly different from the initial emissions. In actual operation, the gas discharged from a plurality of storage tanks is often collected and processed uniformly, and the discharge information of a storage tank for storing a specific substance cannot be distinguished.
The existing sampling device is generally a Su code tank and is used for analyzing organic matter samples with higher volatility, but a part of organic matters with lower volatility have great contribution to ozone and secondary particulate matter generation, and XAD adsorption films made of XAD adsorbents are required to be used for sampling and then analyzed and quantified in a laboratory.
Disclosure of Invention
The invention aims to overcome at least one defect in the prior art, provides a device capable of completing collection of volatile emission VOC source spectrum samples of a storage tank in a laboratory, solves the problems that the collection of emission source spectra in different seasons cannot be completed once due to interference of background concentration in field test, and improves the accuracy and efficiency of the test.
In order to solve the technical problems, the invention provides the following technical scheme:
The organic liquid volatilizing and treating device with controllable condition includes one tank, one temperature controller and one pressure controller; the organic liquid is placed in the tank body, and is volatilized to generate organic gas through temperature regulation of the temperature control device and pressure regulation of the pressure control device; the tank body comprises a storage tank, wherein the storage tank is used for containing organic liquid; the temperature control device comprises a cooling pipe, a heating resistance wire, a radiator, a temperature controller and a temperature sensor; the cooling pipe and the heating resistance wire are wound on the memory storage tank, one end of the cooling pipe is connected with the radiator through the expansion valve, the other end of the cooling pipe is connected with the radiator through the compression pump, and the compression pump is connected with the temperature controller; the heating resistance wire is connected to the temperature controller through a heating device switch, and the temperature sensor is used for sensing the internal temperature of the memory storage tank and transmitting the internal temperature to the temperature controller; the pressure control device comprises a pressure sensor and a compressed nitrogen cylinder, wherein the compressed nitrogen cylinder is connected into the tank body through a nitrogen pipe, a valve is arranged on the nitrogen pipe, the pressure sensor is used for sensing the pressure in the tank body, and the valve is opened and closed according to the pressure condition in the tank body.
Further, the device also comprises an absorption device, wherein the absorption device comprises a valve I, a valve II, a centrifugal fan I and an absorber, organic gas generated by volatilization is respectively communicated to the valve I and the valve II, and the valve II is connected with the centrifugal fan I and the absorber; the organic gas generated by volatilization enters an absorber, a valve I is closed, and the gas enters the absorber through a valve II and a centrifugal fan I; or the first valve is opened, the second valve is closed, and the organic gas directly passes through the absorption device without entering the absorption device.
Still further, the device also comprises a condensation recovery device, wherein the condensation recovery device comprises a valve III and a valve IV, a centrifugal fan II, a pre-condenser, a pre-condensing agent inlet pipe, a pre-condensing agent outlet pipe, a pre-condensing agent temperature controller, a pre-condensing agent outlet, a condenser, a condensing agent inlet pipe, a condensing agent outlet pipe, a condensing liquid outlet and a condensing temperature controller; the organic gas is respectively communicated to a valve III and a valve IV, and the valve IV is connected with a centrifugal fan II, a pre-condenser and a condenser;
The organic gas enters a condensing device, a valve III is closed, and the gas passes through a valve IV and a centrifugal fan II and firstly enters a pre-condenser; the organic liquid generated by pre-condensation is discharged from a pre-condensation liquid outlet, the pre-condensation agent enters from a pre-condensation agent inlet pipe, is discharged from a pre-condensation agent outlet pipe, enters a pre-condensation temperature controller, and enters the pre-condenser in a recycling way, so that the pre-condensation temperature is lower than 10 ℃; the organic gas continuously enters a condenser, the organic liquid generated by condensation is discharged from a condensed liquid outlet, the condensing agent enters from a condensing agent inlet pipe, and is discharged from a condensing agent outlet pipe, and the organic liquid enters a condensing temperature controller, so that the temperature of the condenser is lower than-4 ℃; or the valve III is opened, and the valve IV is closed, so that the organic gas does not enter the condensing device and directly passes through the condensing device.
Still further, the device also comprises a membrane separation device, wherein the membrane separation device comprises a valve five, a valve six, a centrifugal fan three and a membrane separator; the organic gas is respectively communicated to a valve five and a valve six, and the valve six is connected with a centrifugal fan three and a membrane separator; the organic gas enters a membrane separation device, a valve five is closed, and the organic gas enters a membrane separator through a valve six and a centrifugal fan three; or opening the valve five and closing the valve six to enable the organic gas to directly pass through. Still further, the device also comprises an adsorption device, wherein the adsorption device comprises a valve seven and a valve eight, a centrifugal fan four, an activated carbon adsorber and a filtering membrane; the organic gas is respectively communicated to a valve seven and a valve eight, and the valve eight is connected with a centrifugal fan four, an activated carbon adsorber and a particulate filter membrane; the organic gas enters an adsorption device, a valve seven is closed, a valve eight is opened, the organic gas passes through the valve eight and a centrifugal fan four, the organic gas is adsorbed by activated carbon, then the organic gas passes through a particulate filter membrane, activated carbon particles possibly carried along with the gas are removed, and then the organic gas is discharged; or opening the valve seven and closing the valve eight to enable the organic gas to directly pass through the adsorption device without passing through the adsorption device.
Further, the device also comprises a sampling device, and the organic gas enters the sampling device and is divided into three channels; in the first channel, organic gas is sampled by a Su code tank through a first flow regulating valve; the second channel passes through a second flow regulating valve, passes through an XAD adsorption film and is discharged; and the excessive gas in the third channel is discharged after passing through the flow regulating valve III.
Still further, the heating resistance wire sets up in the lower half of memory storage jar body, the cooling tube sets up in the top of heating resistance wire.
Further, the outside cladding of memory storage jar has the heat preservation, the heat preservation includes heat preservation body and heat preservation lid, the heat preservation sets up in heating resistor wire and cooling tube outside.
Still further, the storage tank includes a stainless steel tank and a stainless steel tank cap with agglomerated tetrafluoroethylene therein for sealing.
Further, the pressure maintained in the tank is maintained at 1 atmosphere, when the pressure in the tank increases due to volatilization of the organic liquid, the surplus gas is discharged, and when the pressure in the tank is less than 1 atmosphere, the pressure in the tank is complemented by compressed nitrogen.
The invention has the following beneficial effects:
The organic liquid volatilization and treatment device with controllable conditions can be used for collecting VOC samples for various organic liquids independently, so as to obtain VOC source spectrums of volatilization of various organic liquids and avoid interference of other VOC emission sources. The invention can simulate the actual temperature and the tank pressure, so that the collected VOC source spectrum sample accords with the actual emission condition. Furthermore, compared with more accurate storage tank VOC emission source spectrum acquisition methods such as a bag method, the method is more convenient, can reduce the manpower and time required by sampling, and can realize storage tank VOC emission source spectrum sampling under different conditions in four seasons through temperature control in a short time.
The organic liquid volatilizing and treating device with controllable conditions can simulate the emission condition of organic gas after passing through different pollution control devices, and can independently select or combine common organic gas treatment methods such as an absorption method, a condensation method, a membrane separation method, an adsorption method and the like to ensure that the VOC species in the sampled organic gas are consistent with the actual condition. And can distinguish the VOC species emission condition of different organic liquids after volatilizing to produce gas and passing through the treatment device.
The organic liquid volatilization and treatment device with controllable conditions can utilize the Su code tank and the XAD adsorption film to synchronously sample, analyze and obtain VOC species generated by volatilization of the organic liquid, and more comprehensively evaluate the emission characteristics and environmental influence of volatilization of the organic liquid.
Drawings
FIG. 1 is a schematic diagram of a controlled organic liquid volatilization and treatment device.
The marks in the figure: 1. a stainless steel tank; 2. a heat preservation layer body; 3. stainless steel can lid; 4. a heat preservation layer cover; 5. heating the resistance wire; 6. a heating device switch; 7. a cooling tube; 8. a heat sink; 9. a compression pump; 10. an expansion valve; 11. a temperature controller; 12. a stirrer; 13. a temperature sensor; 14. a pressure sensor; 15. compressing a nitrogen cylinder; 16. a compressed nitrogen valve; 17. a nitrogen pipe; 18. a valve I; 19. a second valve; 20. a centrifugal fan I; 21. an absorber; 22. a third valve; 23. a valve IV; 24. a centrifugal fan II; 25. a pre-condensing liquid outlet; 26. a pre-condensing agent outlet pipe; 27. a pre-condensate inlet pipe; 28. a pre-condensing temperature controller; 29. a pre-condenser; 30. a condensed liquid outlet; 31. a condensing agent outlet pipe; 32. a condensing agent inlet pipe; 33. a condensing temperature controller; 34. a condenser; 35. a fifth valve; 36. a valve six; 37. a centrifugal fan III; 38. a membrane separator; 39. a valve seven; 40. a valve eight; 41. a centrifugal fan IV; 42. an activated carbon adsorber; 43. a particulate filter membrane; 44. a first flow regulating valve; 45. a Su code tank; 46. a second flow regulating valve; 47. XAD adsorption membranes; 48. a flow regulating valve III; 49. and an excess gas discharge port.
Detailed Description
The present invention will be further described in detail with reference to the following examples and drawings for the purpose of enhancing the understanding of the present invention, which examples are provided for the purpose of illustrating the invention only and are not to be construed as limiting the scope of the present invention.
The invention designs a condition-controllable organic liquid volatilizing and processing device which comprises a tank body, a temperature control device and a pressure control device. The organic liquid of the emission source spectrum to be tested is placed in a tank body, and organic gas generated by volatilization enters the stages of absorption, condensation, membrane separation and active carbon adsorption, and is collected by a sampling device, and redundant gas is discharged from an excessive gas discharge port. The tank body comprises a memory storage tank, and the memory storage tank is used for containing organic liquid; the temperature control device comprises a cooling pipe, a heating resistance wire, a radiator, a temperature controller and a temperature sensor; a cooling pipe and a heating resistance wire are wound on the memory storage tank; one end of the cooling pipe is connected with the radiator through an expansion valve, the other end of the cooling pipe is connected with the radiator through a compression pump, and the compression pump is connected with the temperature controller; the heating resistance wire is connected to the temperature controller through a heating device switch; the temperature sensor is used for sensing the internal temperature of the memory storage tank and transmitting the internal temperature to the temperature controller; the pressure control device comprises a pressure sensor and a compressed nitrogen cylinder, the compressed nitrogen cylinder is connected into the tank body through a nitrogen pipe, a valve is arranged on the nitrogen pipe, the pressure sensor is used for sensing the pressure in the tank body, and the valve is opened and closed according to the pressure condition in the tank body. The device can be used for collecting VOC emission samples for various organic liquids independently to obtain VOC source spectrums volatilized by various organic liquids, so that the device is prevented from being interfered by other VOC emission sources; the invention can simulate the actual temperature and the tank pressure, so that the collected VOC source spectrum sample accords with the actual emission condition; the invention can singly select or combine common organic gas treatment methods such as an absorption method, a condensation method, a membrane separation method, an adsorption method and the like, so that VOC species in the sampled organic gas are consistent with actual conditions, and the VOC species emission conditions of different organic liquids after volatilizing to generate gases passing through the treatment device can be distinguished; the invention can realize the sampling of the VOC emission source spectrum of the storage tank under different conditions in four seasons.
Example 1
The embodiment provides a device for volatilizing and treating organic liquid under controllable conditions shown in fig. 1, which comprises a tank body, a temperature control device, a pressure control device, an absorption device, a condensation recovery device, a membrane separation device and an activated carbon adsorption device; the organic liquid is placed in the tank body, and is volatilized to generate organic gas through temperature regulation of the temperature control device and pressure regulation of the pressure control device. The tank body comprises a memory storage tank and an insulation layer covering the exterior of the memory storage tank, wherein the memory storage tank is used for containing organic liquid, and a stirrer 12 is arranged in the memory storage tank. The storage tank may comprise a stainless steel tank 1 and a stainless steel tank cover 3, wherein the stainless steel tank cover 3 is internally agglomerated with tetrafluoroethylene for sealing. The insulation layer may comprise an insulation layer body 2 and an insulation layer cover 4.
The temperature control device comprises a cooling pipe 7, a heating resistance wire 5, a radiator 8, a temperature controller 11 and a temperature sensor 13. The memory storage tank is wound with a cooling pipe 7 and a heating resistance wire 5, one end of the cooling pipe 7 is connected with the radiator 8 through an expansion valve 10, the other end of the cooling pipe is connected with the radiator 8 through a compression pump 9, and the compression pump 9 is connected with a temperature controller 11. The heating resistance wire 5 is connected to a temperature controller 11 through a heating device switch 6. The temperature sensor 13 is used for sensing the internal temperature of the memory storage tank and transmitting the internal temperature to the temperature controller 11. The heating resistance wire 5 is preferably provided at the lower half of the tank body of the storage tank, and the cooling tube 7 is provided above the heating resistance wire 5. The heat insulating layer 2 is preferably provided outside the heating wire 5 and the cooling pipe 7.
The temperature sensor is adopted to detect the temperature of the liquid, and if the temperature exceeds the temperature required to be set by sampling, the temperature controller is utilized to start the compression pump for cooling. The cooling pipe is internally provided with a refrigerant, the refrigerant is compressed by the compression pump to become high-temperature and high-pressure gas, the gas enters the radiator to reduce the temperature of the gas, then the gas flows through the expansion valve, the pressure of the refrigerant is reduced, the temperature of the refrigerant is reduced, and the refrigerant passes through the cooling pipe wound on the upper half part of the tank body to reduce the temperature of organic liquid in the tank body. And the organic liquid is slowly stirred by a stirrer so as to lead the temperature distribution of the organic liquid to be uniform.
If the temperature of the organic liquid measured by the temperature sensor is lower than the temperature required to be set by sampling, a heating device switch is started by a temperature controller, the organic liquid is slowly heated and warmed by a heating resistance wire wound on the lower half part of the tank body, and the organic liquid is slowly stirred by a stirrer, so that the temperature distribution of the organic liquid is uniform.
The temperature controller is set to allow a temperature deviation of plus or minus 1 degree celsius. I.e. the absolute value of the difference between the temperature of the organic liquid and the target temperature is less than 1 degree celsius, the heating means or the cooling means is not turned on.
Preferably, the pressure control device comprises a pressure sensor 14 and a compressed nitrogen cylinder 15, wherein the compressed nitrogen cylinder 15 is connected into the tank body through a nitrogen pipe 17, a compressed nitrogen valve 16 is arranged on the nitrogen pipe 17, the pressure sensor 14 is used for sensing the pressure in the tank body, and the compressed nitrogen valve 16 is opened and closed according to the pressure condition in the tank body.
The pressure in the tank body is kept at 1 atmosphere or slightly higher than 1 atmosphere, so that the pressure is at the same level as the pressure of the actual storage tank. When the volatilization pressure of the organic liquid in the tank body is increased, the redundant gas is discharged. When sampling is started and the pressure in the tank body is smaller than 1 atmosphere, the pressure in the tank body is complemented by compressed nitrogen, so that the condition that the volatile components of the organic liquid are inconsistent with the actual production condition is avoided.
Optionally, the device for volatilizing and treating the organic liquid under the controllable conditions of the invention can further comprise an absorption device, wherein the absorption device comprises a valve I18, a valve II, a centrifugal fan I20 and an absorber 21, the organic gas generated by volatilizing is respectively communicated to the valve I18 and the valve II 19, and the valve II 19 is connected with the centrifugal fan I20 and the absorber 21.
Optionally, the device for volatilizing and treating the organic liquid under controllable conditions according to the present invention may further comprise a condensation recovery device, where the condensation recovery device includes a third valve 22 and a fourth valve 23, a second centrifugal fan 24, a pre-condenser 29, a pre-condenser inlet pipe 27, a pre-condenser outlet pipe 26, a pre-condenser temperature controller 28, a pre-condenser liquid outlet 25, a condenser 34, a condensate inlet pipe 32, a condensate outlet pipe 31, a condensed liquid outlet 30, and a condensation temperature controller 33. The organic gas is respectively communicated to a valve III 22 and a valve IV 23, and the valve IV 23 is connected with a centrifugal fan II 24, a pre-condenser 29 and a condenser 34.
Optionally, the organic liquid volatilizing and treating device with controllable conditions according to the present invention may further comprise a membrane separation device, wherein the membrane separation device comprises a valve five 35 and a valve six 36, a centrifugal fan three 37 and a membrane separator 38. The organic gas is respectively communicated to a valve V35 and a valve V36, and the valve V36 is connected with a centrifugal fan III 37 and a membrane separator 38.
Optionally, the organic liquid volatilizing and treating device with controllable conditions according to the present invention may further comprise an adsorption device, wherein the adsorption device comprises a valve seven 39 and a valve eight 40, a centrifugal fan four 41, an activated carbon adsorber 42, and a particulate filter membrane 43. The organic gas is respectively communicated with a valve seven 39 and a valve eight 40, and the valve eight 40 is connected with a centrifugal fan four 41, an activated carbon adsorber 42 and a particulate filter membrane 43.
The invention also provides a sampling device, which comprises a first flow regulating valve 44, a second flow regulating valve 46, a third flow regulating valve 48, a Su code tank 45, an XAD adsorption film 47 and an excessive gas discharge port 49.
The valve switch can be controlled according to actual conditions, so that organic gas passes through the four processing devices, and the organic gas recovery and removal process in the actual production process is reduced. The processing devices are arranged according to the common sequence, and if the actual situation is different from the ordering mode of the patent, the sequence of the processing devices in the patent can be exchanged.
The working principle of the invention is as follows:
Placing the organic liquid into a stainless steel tank 1, covering a stainless steel tank cover 3, and starting a stirrer to enable the organic liquid to be stirred uniformly slowly. According to the temperature signal measured by the temperature sensor 13, if the temperature is higher than the set temperature, the compression pump 9 is turned on to compress the refrigerant flowing from the cooling pipe 7, the refrigerant enters the radiator 8 to reduce the temperature, and the refrigerant after the temperature reduction flows into the cooling pipe 7 through the expansion valve 10. If the temperature is lower than the set temperature, the heating device switch 6 is turned on, and the heating is performed by using the heating resistance wire 5 wound on the can body. The outside of the cooling pipe and the resistance wire is provided with an insulating layer body 2, and the outside of the stainless steel tank cover 3 is also covered with an insulating layer cover 4.
The pressure in the stainless steel tank 1 is measured by the pressure sensor 14, and in order to control the pressure in the stainless steel tank 1 to be 1atm or slightly higher, the pressure is supplemented by the compressed nitrogen cylinder 15 when the pressure is too low.
When the temperature of the liquid in the stainless steel tank 1 reaches the temperature set by sampling and the pressure is 1 atmosphere or slightly higher than 1 atmosphere, the gas volatilized by the organic liquid is slowly discharged to enter a processing device in the next stage, and meanwhile compressed nitrogen is slowly introduced to maintain the pressure of the tank body constant.
The organic gas generated by volatilization firstly enters the absorption device, the valve I18 is closed, and the gas passes through the valve II 19 and the centrifugal fan I20 and enters the absorber 21. Gasoline, diesel or other solvents commonly used for absorption are selected for placement in the absorber. It is also possible to open valve one 18 and close valve two 19 so that the organic gas does not enter the absorber but is passed directly to the next section.
The organic gas enters the condensing device, valve three 22 is closed, so that the gas passes through valve four 23 and centrifugal fan two 24, and firstly enters the pre-condenser 29. The organic liquid generated by pre-condensation is discharged from a pre-condensation liquid outlet 25, the pre-condensation agent enters from a pre-condensation agent inlet pipe 27, is discharged from a pre-condensation agent outlet pipe 26, enters a pre-condensation temperature controller 28, and is recycled into a pre-condenser 29 again, so that the pre-condensation temperature is below 10 ℃. The organic gas continues to enter the condenser 34, the organic liquid generated by condensation is discharged from the condensed liquid outlet 30, the condensing agent enters from the condensing agent inlet pipe 32, and is discharged from the condensing agent outlet pipe 31, and enters into the condensing temperature controller 33, so that the temperature of the condenser is ensured to be lower than-4 ℃. It is also possible to open valve three 22 and close valve four 23 so that the organic gas does not enter the condensing device but is passed directly to the next section.
The organic gas enters the membrane separation device, the valve five 35 is closed, and the organic gas passes through the valve six 36 and the centrifugal fan three 37 and enters the membrane separator 38. The organic gas passing through the membrane separator enters the next section. The organic gas can also be directly passed through by opening valve five 35 and closing valve six 36.
The organic gas enters the adsorption device, the valve seven 39 is closed, the valve eight 40 is opened, and the organic gas passes through the valve eight 40, the centrifugal fan four 41, the activated carbon 42 and the particulate filter membrane 43 and is discharged. The organic gas can also be directly discharged without passing through the adsorption device by opening the valve seven 39 and closing the valve eight 40.
The organic gas enters a sampling device and is divided into three channels, wherein in the first channel, the organic gas is sampled by a Su code tank 45 after passing through a first flow regulating valve 44; the second channel passes through the second flow regulating valve 46, passes through the XAD adsorption film 47 and is discharged; the excess gas in the third passage is discharged after passing through the third flow regulating valve 48.
The above description is only of the preferred embodiments of the present invention, and is not intended to limit the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (8)
1. The utility model provides an organic liquid volatilizees and processing apparatus of controllable condition which characterized in that: comprises a tank body, a temperature control device, a pressure control device and an absorption device; the organic liquid is placed in the tank body, and is volatilized to generate organic gas through temperature regulation of the temperature control device and pressure regulation of the pressure control device; the tank body comprises a storage tank, wherein the storage tank is used for containing organic liquid; the temperature control device comprises a cooling pipe, a heating resistance wire, a radiator, a temperature controller and a temperature sensor, wherein the cooling pipe and the heating resistance wire are wound on the memory storage tank, one end of the cooling pipe is connected with the radiator through an expansion valve, the other end of the cooling pipe is connected with the radiator through a compression pump, the compression pump is connected with the temperature controller, the heating resistance wire is connected to the temperature controller through a heating device switch, and the temperature sensor is used for sensing the internal temperature of the memory storage tank and transmitting the internal temperature to the temperature controller; the pressure control device comprises a pressure sensor and a compressed nitrogen cylinder, wherein the compressed nitrogen cylinder is connected into the tank body through a nitrogen pipe, a valve is arranged on the nitrogen pipe, the pressure sensor is used for sensing the pressure in the tank body, and the valve is opened and closed according to the pressure condition in the tank body; the absorption device comprises a valve I, a valve II, a centrifugal fan I and an absorber, organic gas generated by volatilization is respectively communicated to the valve I and the valve II, and the valve II is connected with the centrifugal fan I and the absorber; the organic gas generated by volatilization enters an absorber, a valve I is closed, and the gas enters the absorber through a valve II and a centrifugal fan I; or opening the first valve and closing the second valve to enable the organic gas not to enter the absorption device but to directly pass through the absorption device; the heating resistance wire is arranged at the lower half part of the tank body of the storage tank, and the cooling pipe is arranged above the heating resistance wire.
2. The apparatus for volatilizing and treating organic liquid under controlled conditions according to claim 1, wherein: the condensing and recycling device comprises a valve III and a valve IV, a centrifugal fan II, a pre-condenser, a pre-condensing agent inlet pipe, a pre-condensing agent outlet pipe, a pre-condenser temperature controller, a pre-condensing agent outlet, a condenser, a condensing agent inlet pipe, a condensing agent outlet pipe, a condensing liquid outlet and a condensing temperature controller; the organic gas is respectively communicated to a valve III and a valve IV, and the valve IV is connected with a centrifugal fan II, a pre-condenser and a condenser; the organic gas enters a condensing device, a valve III is closed, and the gas passes through a valve IV and a centrifugal fan II and firstly enters a pre-condenser; the organic liquid generated by pre-condensation is discharged from a pre-condensation liquid outlet, the pre-condensation agent enters from a pre-condensation agent inlet pipe, is discharged from a pre-condensation agent outlet pipe, enters a pre-condensation temperature controller, and enters the pre-condenser in a recycling way, so that the pre-condensation temperature is lower than 10 ℃; the organic gas continuously enters a condenser, the organic liquid generated by condensation is discharged from a condensed liquid outlet, the condensing agent enters from a condensing agent inlet pipe, and is discharged from a condensing agent outlet pipe, and the organic liquid enters a condensing temperature controller, so that the temperature of the condenser is lower than-4 ℃; or the valve III is opened, and the valve IV is closed, so that the organic gas does not enter the condensing device and directly passes through the condensing device.
3. A condition-controllable organic liquid volatilization and treatment device as set forth in claim 2, wherein: the device also comprises a membrane separation device, wherein the membrane separation device comprises a valve five, a valve six, a centrifugal fan three and a membrane separator; the organic gas is respectively communicated to a valve five and a valve six, and the valve six is connected with a centrifugal fan three and a membrane separator; the organic gas enters a membrane separation device, a valve five is closed, and the organic gas enters a membrane separator through a valve six and a centrifugal fan three; or opening the valve five and closing the valve six to enable the organic gas to directly pass through.
4. A condition-controllable organic liquid volatilization and treatment device as set forth in claim 3, wherein: the device also comprises an adsorption device, wherein the adsorption device comprises a valve seven, a valve eight, a centrifugal fan four, an activated carbon adsorber and a filtering membrane; the organic gas is respectively communicated to a valve seven and a valve eight, and the valve eight is connected with a centrifugal fan four, an activated carbon adsorber and a particulate filter membrane; the organic gas enters the adsorption device, the valve seven is closed, the valve eight is opened, and the organic gas passes through the valve eight and the centrifugal fan four and is discharged after passing through the activated carbon and the particulate matter filter membrane; or opening the valve seven and closing the valve eight to enable the organic gas to directly pass through the adsorption device without passing through the adsorption device.
5. A controllable condition organic liquid volatilizing and processing device according to any one of claims 1-4 wherein: the organic gas enters the sampling device and is divided into three channels; in the first channel, organic gas is sampled by a Su code tank through a first flow regulating valve; the second channel passes through a second flow regulating valve, passes through an XAD adsorption film and is discharged; and the excessive gas in the third channel is discharged after passing through the flow regulating valve III.
6. The apparatus for volatilizing and treating organic liquid under controlled conditions according to claim 1, wherein: the outside cladding of memory storage jar has the heat preservation, the heat preservation includes the heat preservation body and heat preservation lid, the heat preservation sets up in heating resistor silk and cooling tube outside.
7. The apparatus for volatilizing and treating organic liquid under controlled conditions according to claim 1, wherein: the storage tank comprises a stainless steel tank and a stainless steel tank cover, wherein the stainless steel tank cover is internally agglomerated with tetrafluoroethylene for sealing.
8. The apparatus for volatilizing and treating organic liquid under controlled conditions according to claim 1, wherein: the pressure kept in the tank body is kept at 1 atmosphere, when the volatilization pressure of the organic liquid in the tank body is increased, redundant gas is discharged, and when the pressure in the tank body is smaller than 1 atmosphere, the pressure in the tank body is complemented by compressed nitrogen.
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| CN109855898A (en) * | 2019-02-27 | 2019-06-07 | 中国石油大学(华东) | Single well site La Jing storage tank opens wide liquid level contaminated-oil basin VOCs emission transaction device |
| CN110244031B (en) * | 2019-06-28 | 2021-02-12 | 江苏省环境科学研究院 | Wood-based plate VOC releases survey device |
| CN110231202B (en) * | 2019-07-04 | 2020-02-21 | 江苏省环境科学研究院 | Device and method for measuring emission of wet quenching atmospheric pollutants based on unmanned aerial vehicle |
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