CN111214926A - Waste gas recovery processing system and method based on LNG cold energy utilization - Google Patents
Waste gas recovery processing system and method based on LNG cold energy utilization Download PDFInfo
- Publication number
- CN111214926A CN111214926A CN202010203470.3A CN202010203470A CN111214926A CN 111214926 A CN111214926 A CN 111214926A CN 202010203470 A CN202010203470 A CN 202010203470A CN 111214926 A CN111214926 A CN 111214926A
- Authority
- CN
- China
- Prior art keywords
- vocs
- lng
- waste gas
- cooler
- communicated
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000002912 waste gas Substances 0.000 title claims abstract description 72
- 238000011084 recovery Methods 0.000 title claims abstract description 46
- 238000012545 processing Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims description 15
- 239000012855 volatile organic compound Substances 0.000 claims abstract description 120
- 238000001179 sorption measurement Methods 0.000 claims abstract description 46
- 239000003507 refrigerant Substances 0.000 claims abstract description 28
- 238000000746 purification Methods 0.000 claims abstract description 14
- 238000009833 condensation Methods 0.000 claims abstract description 13
- 230000005494 condensation Effects 0.000 claims abstract description 13
- 230000008676 import Effects 0.000 claims abstract description 5
- 238000001816 cooling Methods 0.000 claims description 14
- 239000007788 liquid Substances 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 4
- 239000002699 waste material Substances 0.000 claims description 4
- 238000003672 processing method Methods 0.000 claims description 3
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims 3
- 238000002309 gasification Methods 0.000 claims 1
- 238000013461 design Methods 0.000 abstract description 3
- 238000005057 refrigeration Methods 0.000 abstract description 3
- 239000003949 liquefied natural gas Substances 0.000 description 72
- 208000028659 discharge Diseases 0.000 description 16
- 239000007789 gas Substances 0.000 description 8
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- CBENFWSGALASAD-UHFFFAOYSA-N Ozone Chemical compound [O-][O+]=O CBENFWSGALASAD-UHFFFAOYSA-N 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000012528 membrane Substances 0.000 description 2
- -1 methane hydrocarbons Chemical class 0.000 description 2
- 150000002894 organic compounds Chemical class 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000443 aerosol Substances 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000008282 halocarbons Chemical class 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000009972 noncorrosive effect Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
- 230000009967 tasteless effect Effects 0.000 description 1
- 239000010913 used oil Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Images
Classifications
-
- 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
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
A waste gas recovery processing system based on LNG cold energy utilization comprises an LNG cold energy heat exchange system, a VOCs condensation recovery system and a VOCs adsorption purification system, wherein the LNG cold energy heat exchange system comprises an LNG heat exchanger, an air temperature gasifier, a VOCs primary cooler and a VOCs deep cooler; the cold inlet of the LNG heat exchanger and the inlet of the air temperature gasifier are connected in parallel and then communicated with an external LNG inlet pipeline, the cold outlet of the LNG heat exchanger and the outlet of the air temperature gasifier are connected in parallel and then communicated with an external LNG outlet pipeline, and a refrigerant is arranged in a hot cavity of the LNG heat exchanger; the hot import and the outside exhaust emission pipeline intercommunication of VOCs primary cooler, the hot export of VOCs primary cooler and the hot import intercommunication of VOCs deep cooler, the cold import of VOCs primary cooler and the hot export intercommunication of VOCs deep cooler. The system has reasonable design, safety and reliability, can reduce the refrigeration power consumption of the compressor, greatly reduces the operation cost, and greatly improves the recovery efficiency of the VOCs based on the low-temperature characteristic setting of the LNG.
Description
Technical Field
The invention relates to the technical field of waste gas recovery and treatment, in particular to a waste gas recovery and treatment system based on LNG cold energy utilization, and further relates to a waste gas treatment method of the waste gas recovery and treatment system based on LNG cold energy utilization.
Background
Currently, the commonly used oil gas recovery processing technology can be classified into 4 types, i.e., a condensation method, an absorption method, an adsorption method, and a membrane separation method, according to the basic principle thereof. In order to better recover oil gas and achieve the purposes of energy conservation, economy and environmental protection, a plurality of composite process methods such as condensation adsorption oil gas recovery, a silica gel + activated carbon adsorption method, a membrane + adsorption method and the like appear in the market at present.
The condensing adsorption oil gas recovery is to cool the organic components to below the dew point by adopting low temperature to carry out liquefaction recovery. It is suitable for treating high-concentration waste gas, especially waste gas containing pure harmful substance components; can be used as the pretreatment of combustion and adsorption purification; can treat high-temperature waste gas containing a large amount of water vapor. The method has the advantages of simple required equipment and operation conditions, high purity of recovered substances, high purification degree required by the limitation of condensation temperature on the purification degree of the waste gas, or high purification degree required by the purification degree of the waste gas, or high energy consumption, high running cost and low economic cost due to the fact that the waste gas needs to be cooled to a very low temperature when the low-concentration waste gas is treated, and the additionally arranged refrigeration equipment is needed, and meanwhile, the condensed tail gas still contains organic matters needing a certain concentration, so that the secondary pollution is serious, and the method is rarely used for treating the low-concentration tail gas.
Disclosure of Invention
The invention aims to solve the technical problem of the prior art and provides a waste gas recovery and treatment system based on LNG cold energy utilization, which has the advantages of reasonable design, low cost and high waste gas recovery and treatment efficiency.
The invention also provides a treatment method of the waste gas recovery treatment system based on LNG cold energy utilization.
The technical problem to be solved by the present invention is achieved by the following technical means. The invention relates to a waste gas recovery processing system based on LNG cold energy utilization, which comprises an LNG cold energy heat exchange system, a VOCs condensation recovery system and a VOCs adsorption purification system;
the LNG cold energy heat exchange system comprises an LNG heat exchanger, an air temperature gasifier, a VOCs primary cooler and a VOCs deep cooler; the cold inlet of the LNG heat exchanger and the inlet of the air temperature gasifier are connected in parallel and then communicated with an external LNG inlet pipeline, the cold outlet of the LNG heat exchanger and the outlet of the air temperature gasifier are connected in parallel and then communicated with an external LNG outlet pipeline, and a refrigerant is arranged in a hot cavity of the LNG heat exchanger; the hot inlet of the VOCs primary cooler is communicated with an external waste gas discharge pipeline, the hot outlet of the VOCs primary cooler is communicated with the hot inlet of the VOCs deep cooler, and the cold inlet of the VOCs primary cooler is communicated with the hot outlet of the VOCs deep cooler; the cold inlet of the VOCs deep cooler is communicated with the hot outlet of the LNG heat exchanger, and the cold outlet of the VOCs deep cooler is communicated with the hot inlet of the LNG heat exchanger;
the VOCs condensation recovery system comprises a condensate storage tank for collecting condensate; condensate outlets of the VOCs primary cooler and the VOCs deep cooler are communicated with a condensate storage tank;
the VOCs adsorption purification system comprises a first adsorption tank, a second adsorption tank and a discharge cylinder for discharging waste gas; the air inlets of the first adsorption tank and the second adsorption tank are communicated with the cold outlet of the VOCs primary cooler after being connected in parallel, and the air outlets of the first adsorption tank and the second adsorption tank are communicated with the discharge cylinder after being connected in parallel.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the waste gas recovery processing system based on LNG cold energy utilization, a refrigerant circulating pump for providing power for refrigerant circulation is communicated between a cold outlet of the VOCs deep cooler and a hot inlet of the LNG heat exchanger.
The technical problem to be solved by the invention can be further realized by the following technical scheme that for the waste gas recovery and treatment system based on LNG cold energy utilization, a fan convenient for air inlet is communicated between a hot inlet of a VOCs primary cooler and an external waste gas discharge pipeline.
The technical problem to be solved by the invention can be further solved by adopting the following technical scheme that for the waste gas recovery and treatment system based on LNG cold energy utilization, the outlet of the condensate storage tank is communicated with a liquid discharge pump which is conveniently communicated with an external waste liquid recovery pipeline.
The technical problem to be solved by the present invention can be further solved by the following technical solution, and for the above waste gas recovery processing system based on LNG cold energy utilization, a waste gas recovery processing method based on LNG cold energy utilization comprises the following steps:
(1) one part of LNG supplied by an external LNG inlet pipeline is supplied to the outside through an air temperature gasifier, and the other part of LNG is supplied to the outside after exchanging heat with a refrigerant through an LNG heat exchanger and increasing the temperature;
(2) waste gas discharged by an external waste gas discharge pipeline enters a VOCs deep cooler through a VOCs primary cooler, enters the VOCs primary cooler after being subjected to heat exchange and cooling with a refrigerant in the VOCs deep cooler, is subjected to heat exchange and cooling with waste gas entering the VOCs primary cooler through the external waste gas discharge pipeline in the VOCs primary cooler, is adsorbed by a first adsorption tank or a second adsorption tank, and is discharged outwards through a discharge cylinder;
(3) the refrigerant circularly exchanges heat between the LNG heat exchanger and the VOCs deep cooler, exchanges heat with LNG in the LNG heat exchanger to heat up, and exchanges heat with waste gas in the VOCs deep cooler to cool down;
(4) and the condensate discharged from the VOCs primary cooler and the VOCs deep cooler enters a condensate storage tank for centralized storage.
Compared with the prior art, the VOCs recovery processing system based on LNG cold energy is mainly used for recovering and processing waste gas containing VOCs, and comprises an LNG cold energy heat exchange system, a VOCs condensation recovery system and a VOCs adsorption purification system, in an LNG heat exchanger, LNG transfers cold energy to a VOCs primary cooler and a VOCs deep cooler by using an intermediate refrigerant, and after waste gas is condensed and liquefied, the waste gas is discharged after passing through a first adsorption tank or a second adsorption pipe to adsorb residual extremely small amount of VOCs gas and reaching the standard; the LNG supply system takes the LNG as a cold source, realizes the utilization of the LNG cold energy through the intermediate refrigerant, separates the LNG supply process from the VOCs recovery process while improving the LNG energy utilization rate, effectively prevents the normal supply of the LNG from being influenced when the VOCs condensation recovery system and the adsorption purification system are in failure, and improves the safety of the LNG supply system. The system has reasonable design, safety and reliability, can reduce the refrigeration power consumption of the compressor, greatly reduces the operation cost, and greatly improves the recovery efficiency of the VOCs based on the low-temperature characteristic setting of the LNG.
Drawings
FIG. 1 is a schematic diagram of a structure of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention, and it is obvious that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, the waste gas recovery processing system based on LNG cold energy utilization comprises an LNG cold energy heat exchange system, a VOCs condensation recovery system and a VOCs adsorption purification system;
the LNG cold energy heat exchange system comprises an LNG heat exchanger 1, an air temperature gasifier 2, a VOCs primary cooler 4 and a VOCs deep cooler 3; the cold inlet of the LNG heat exchanger 1 and the inlet of the air temperature gasifier 2 are connected in parallel and then communicated with an external LNG inlet pipeline, the cold outlet of the LNG heat exchanger 1 and the outlet of the air temperature gasifier 2 are connected in parallel and then communicated with an external LNG outlet pipeline, a refrigerant is arranged in a hot cavity of the LNG heat exchanger 1, a cold cavity and a hot cavity are arranged in the LNG heat exchanger 1, the cold cavity is provided with the cold inlet and the cold outlet, and the hot cavity is provided with the hot inlet and the hot outlet; the hot inlet of the VOCs primary cooler 4 is communicated with an external waste gas discharge pipeline, the hot outlet of the VOCs primary cooler 4 is communicated with the hot inlet of the VOCs deep cooler 3, and the cold inlet of the VOCs primary cooler 4 is communicated with the hot outlet of the VOCs deep cooler 3; the cold inlet of the VOCs deep cooler 3 is communicated with the hot outlet of the LNG heat exchanger 1, and the cold outlet of the VOCs deep cooler 3 is communicated with the hot inlet of the LNG heat exchanger 1; the LNG heat exchanger 1 adopts a heat exchanger in the prior art and is used for carrying out heat exchange between LNG and a refrigerant to realize the cooling of the refrigerant; the VOCs primary cooler 4 adopts a primary cooler in the prior art, is internally provided with a cooling pipeline, is provided with a cold inlet and a cold outlet, and is provided with a hot inlet and a hot outlet for carrying out heat exchange between newly input waste gas and waste gas subjected to heat exchange by a refrigerant so as to cool the newly input waste gas; the VOCs deep cooler 3 adopts a deep cooler in the prior art, is internally provided with a cooling pipeline, is provided with a cold inlet and a cold outlet, and is provided with a hot inlet and a hot outlet for exchanging heat between the waste gas subjected to heat exchange by the VOCs primary cooler 4 and a refrigerant so as to realize the cooling of the waste gas;
the air temperature gasifier 2 in the prior art is adopted, and is used for outputting the LNG after heating and gasifying, so that the purposes of environmental protection and energy saving are achieved;
the VOCs condensation recovery system comprises a condensate storage tank 6 for collecting condensate; condensate outlets of the primary VOCs coolers 4 and the deep VOCs coolers 3 are communicated with a condensate storage tank 6; condensate generated by waste gas generated by heat exchange in the VOCs primary cooler 4 and the VOCs deep cooler 3 is stored in a condensate storage tank 6, so that subsequent centralized discharge treatment is facilitated;
the VOCs adsorption purification system comprises a first adsorption tank 7, a second adsorption tank 8 and a discharge cylinder 9 for discharging waste gas; the air inlets of the first adsorption tank 7 and the second adsorption tank 8 are communicated with the cold outlet of the VOCs primary cooler 4 after being connected in parallel, and the air outlets of the first adsorption tank 7 and the second adsorption tank 8 are communicated with the discharge cylinder 9 after being connected in parallel. First adsorption tank 7, second adsorption tank 8 adopt the VOCs adsorption tanks among the prior art, and inside splendid attire has adsorbing materials such as granular activated carbon, activated carbon fiber, zeolite, molecular sieve, porous clay ore, active alumina, silica gel or high polymer adsorption resin for the VOCs in the waste gas after the cooling adsorbs, has both realized the recovery of VOCs, has realized the processing of waste gas again.
LNG is the liquefied natural gas, and the main component of LNG is methane, which is known as the cleanest fossil energy on the earth, and is colorless, tasteless, nontoxic and noncorrosive, and the liquefied natural gas is liquid after being compressed and cooled to the condensation point (-161.5 ℃) of the natural gas, and is usually stored in a low-temperature storage tank at-161.5 ℃ and about 0.1 MPa.
Volatile organic compounds, which are commonly expressed by VOCs, such as methane hydrocarbons (NMHCs for short), oxygen-containing organic compounds, halogenated hydrocarbons, nitrogen-containing organic compounds, sulfur-containing organic compounds and the like; VOCs participate in the formation of ozone and secondary aerosols in the atmospheric environment, which have important effects on regional atmospheric ozone pollution and PM2.5 pollution.
And a refrigerant circulating pump 5 for providing power for refrigerant circulation is communicated between the cold outlet of the VOCs deep cooler 3 and the hot inlet of the LNG heat exchanger 1. Refrigerant circulating pump 5 is used for realizing that the refrigerant carries out incessant circulation between VOCs deep cooler 3, LNG heat exchanger 1, transmits the cold energy of LNG for waste gas, realizes the cooling of waste gas.
The fan 10 that is convenient for admit air communicates between the hot import of VOCs primary cooler 4 and outside exhaust emission pipeline for waste gas provides power, make waste gas continuously remove in VOCs primary cooler 4, VOCs deep-cooling ware 3, realize the developments cooling, raise the efficiency.
And the outlet of the condensate storage tank 6 is communicated with a liquid discharge pump 11 which is conveniently communicated with an external waste liquid recovery pipeline. The drain pump 11 is provided for collectively discharging the condensate storage tank 6 to an external waste liquid recovery pipe for collectively treating the condensate.
A waste gas recovery processing method based on LNG cold energy utilization comprises the following steps:
(1) one part of LNG supplied by an external LNG inlet pipeline is supplied to the outside through an air temperature gasifier, and the other part of LNG is supplied to the outside after exchanging heat with a refrigerant through an LNG heat exchanger and increasing the temperature;
(2) waste gas discharged by an external waste gas discharge pipeline enters a VOCs deep cooler through a VOCs primary cooler, enters the VOCs primary cooler after being subjected to heat exchange and cooling with a refrigerant in the VOCs deep cooler, is subjected to heat exchange and cooling with waste gas entering the VOCs primary cooler through the external waste gas discharge pipeline in the VOCs primary cooler, is adsorbed by a first adsorption tank or a second adsorption tank, and is discharged outwards through a discharge cylinder;
(3) the refrigerant circularly exchanges heat between the LNG heat exchanger and the VOCs deep cooler, exchanges heat with LNG in the LNG heat exchanger to heat up, and exchanges heat with waste gas in the VOCs deep cooler to cool down;
(4) and the condensate discharged from the VOCs primary cooler and the VOCs deep cooler enters a condensate storage tank for centralized storage.
According to the invention, the cold energy of LNG is transferred to the waste gas through the intermediate refrigerant, after the waste gas is condensed and liquefied, the waste gas is discharged after passing through the adsorption tank to adsorb the residual extremely small amount of VOCs gas, so that the recovery of VOCs is realized, and the treatment of the waste gas is also realized.
Claims (5)
1. The utility model provides a waste gas recovery processing system based on LNG cold energy utilizes which characterized in that: the system comprises an LNG cold energy heat exchange system, a VOCs condensation recovery system and a VOCs adsorption purification system;
the LNG cold energy heat exchange system comprises an LNG heat exchanger, an air temperature gasifier, a VOCs primary cooler and a VOCs deep cooler; the cold inlet of the LNG heat exchanger and the inlet of the air temperature gasifier are connected in parallel and then communicated with an external LNG inlet pipeline, the cold outlet of the LNG heat exchanger and the outlet of the air temperature gasifier are connected in parallel and then communicated with an external LNG outlet pipeline, and a refrigerant is arranged in a hot cavity of the LNG heat exchanger; the hot inlet of the VOCs primary cooler is communicated with an external waste gas discharge pipeline, the hot outlet of the VOCs primary cooler is communicated with the hot inlet of the VOCs deep cooler, and the cold inlet of the VOCs primary cooler is communicated with the hot outlet of the VOCs deep cooler; the cold inlet of the VOCs deep cooler is communicated with the hot outlet of the LNG heat exchanger, and the cold outlet of the VOCs deep cooler is communicated with the hot inlet of the LNG heat exchanger;
the VOCs condensation recovery system comprises a condensate storage tank for collecting condensate; condensate outlets of the VOCs primary cooler and the VOCs deep cooler are communicated with a condensate storage tank;
the VOCs adsorption purification system comprises a first adsorption tank, a second adsorption tank and a discharge cylinder for discharging waste gas; the air inlets of the first adsorption tank and the second adsorption tank are communicated with the cold outlet of the VOCs primary cooler after being connected in parallel, and the air outlets of the first adsorption tank and the second adsorption tank are communicated with the discharge cylinder after being connected in parallel.
2. The LNG cold energy utilization-based waste gas recovery processing system of claim 1, wherein: and a refrigerant circulating pump for providing power for refrigerant circulation is communicated between the cold outlet of the VOCs deep cooler and the heat inlet of the LNG heat exchanger.
3. The LNG cold energy utilization-based waste gas recovery processing system of claim 1, wherein: the fan that is convenient for admit air communicates between the hot import of VOCs primary cooler and outside exhaust emission pipeline.
4. The LNG cold energy utilization-based waste gas recovery processing system of claim 1, wherein: and an outlet of the condensate storage tank is communicated with a liquid discharge pump which is conveniently communicated with an external waste liquid recovery pipeline.
5. A waste gas recovery processing method based on LNG cold energy utilization is characterized by comprising the following steps: the method uses the waste gas recovery processing system based on LNG cold energy utilization of the methanol burner gasification furnace of any one of claims 1-4, and comprises the following steps:
(1) one part of LNG supplied by an external LNG inlet pipeline is supplied to the outside through an air temperature gasifier, and the other part of LNG is supplied to the outside after exchanging heat with a refrigerant through an LNG heat exchanger and increasing the temperature;
(2) waste gas discharged by an external waste gas discharge pipeline enters a VOCs deep cooler through a VOCs primary cooler, enters the VOCs primary cooler after being subjected to heat exchange and cooling with a refrigerant in the VOCs deep cooler, is subjected to heat exchange and cooling with waste gas entering the VOCs primary cooler through the external waste gas discharge pipeline in the VOCs primary cooler, is adsorbed by a first adsorption tank or a second adsorption tank, and is discharged outwards through a discharge cylinder;
(3) the refrigerant circularly exchanges heat between the LNG heat exchanger and the VOCs deep cooler, exchanges heat with LNG in the LNG heat exchanger to heat up, and exchanges heat with waste gas in the VOCs deep cooler to cool down;
(4) and the condensate discharged from the VOCs primary cooler and the VOCs deep cooler enters a condensate storage tank for centralized storage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010203470.3A CN111214926A (en) | 2020-03-16 | 2020-03-16 | Waste gas recovery processing system and method based on LNG cold energy utilization |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010203470.3A CN111214926A (en) | 2020-03-16 | 2020-03-16 | Waste gas recovery processing system and method based on LNG cold energy utilization |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111214926A true CN111214926A (en) | 2020-06-02 |
Family
ID=70826319
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010203470.3A Pending CN111214926A (en) | 2020-03-16 | 2020-03-16 | Waste gas recovery processing system and method based on LNG cold energy utilization |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111214926A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303769A (en) * | 2020-11-16 | 2021-02-02 | 安瑞科(蚌埠)压缩机有限公司 | LNG cold energy recycling and storing device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110440135A (en) * | 2019-08-13 | 2019-11-12 | 青岛科技大学 | A kind of VOCs recovery system based on LNG cold energy |
| CN110575734A (en) * | 2019-10-24 | 2019-12-17 | 青岛科技大学 | gaseous cryrogenic recovery unit of VOCs based on industry is cold useless |
| CN211936217U (en) * | 2020-03-16 | 2020-11-17 | 连云港市拓普科技发展有限公司 | Waste gas recovery processing system based on LNG cold energy utilizes |
-
2020
- 2020-03-16 CN CN202010203470.3A patent/CN111214926A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110440135A (en) * | 2019-08-13 | 2019-11-12 | 青岛科技大学 | A kind of VOCs recovery system based on LNG cold energy |
| CN110575734A (en) * | 2019-10-24 | 2019-12-17 | 青岛科技大学 | gaseous cryrogenic recovery unit of VOCs based on industry is cold useless |
| CN211936217U (en) * | 2020-03-16 | 2020-11-17 | 连云港市拓普科技发展有限公司 | Waste gas recovery processing system based on LNG cold energy utilizes |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112303769A (en) * | 2020-11-16 | 2021-02-02 | 安瑞科(蚌埠)压缩机有限公司 | LNG cold energy recycling and storing device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101323799A (en) | Coke oven gas dry cleaning temperature swing adsorption process | |
| WO2007012143A1 (en) | Recovery of carbon dioxide from flue gases | |
| CN210495768U (en) | Device for recycling dichloromethane of diaphragm of lithium battery by wet process through compression condensation membrane separation technology | |
| CN115069057B (en) | Method for purifying and recovering carbon dioxide by low-temperature rectification | |
| CN101822929B (en) | Method for capturing carbon dioxide by utilizing electrical desorption technology | |
| CN116196734A (en) | Cement oxy-fuel combustion coupling flue gas carbon dioxide trapping and purifying device | |
| CN116059784A (en) | Method and system for capturing carbon dioxide in flue gas by pressure swing adsorption | |
| CN111778060A (en) | Oil gas recovery device and recovery method for cooling and saving energy by using excess pressure | |
| CN106422647B (en) | Low liquefaction temperature organic waste gas recovery device | |
| CN114887443A (en) | Oil gas condensation recovery combined RTO petrochemical tank area waste gas treatment system and process | |
| CN211936217U (en) | Waste gas recovery processing system based on LNG cold energy utilizes | |
| CN111214926A (en) | Waste gas recovery processing system and method based on LNG cold energy utilization | |
| CN103525492A (en) | Natural gas processing and utilizing process | |
| CN109370670B (en) | Process system for simultaneously removing carbon dioxide, water and heavy hydrocarbon in natural gas | |
| CN103159580B (en) | Method of purifying and extracting methane in waste landfill gas | |
| CN110408446B (en) | Liquefied natural gas pretreatment device and method combining membrane separation and temperature swing adsorption | |
| CN217661593U (en) | Device for purifying and recovering carbon dioxide by low-temperature rectification | |
| CN114279254B (en) | Flue gas waste heat utilization and carbon dioxide capturing and recycling process | |
| CN216303278U (en) | Direct liquefaction capture system of carbon dioxide under supercritical pressure | |
| KR20110114189A (en) | Carbon capture and storage system, and heat pump | |
| CN210832753U (en) | Carbon dioxide compression and purification system of coal-fired boiler | |
| CN211753704U (en) | Large-air-volume medium-concentration ethyl acetate recovery device | |
| CN212387998U (en) | Oil gas recovery device capable of cooling and saving energy by using residual pressure | |
| CN210410096U (en) | Separation system for carbon dioxide in medium-high pressure gas source | |
| CN105617814A (en) | Low-energy organic exhaust gas purification and recovery device and method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |