CN109646982A - Rectification tail gas recovery method - Google Patents
Rectification tail gas recovery method Download PDFInfo
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- CN109646982A CN109646982A CN201811468626.XA CN201811468626A CN109646982A CN 109646982 A CN109646982 A CN 109646982A CN 201811468626 A CN201811468626 A CN 201811468626A CN 109646982 A CN109646982 A CN 109646982A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D5/00—Condensation of vapours; Recovering volatile solvents by condensation
- B01D5/0003—Condensation of vapours; Recovering volatile solvents by condensation by using heat-exchange surfaces for indirect contact between gases or vapours and the cooling medium
- B01D5/0006—Coils or serpentines
-
- 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
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- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07C—ACYCLIC OR CARBOCYCLIC COMPOUNDS
- C07C7/00—Purification; Separation; Use of additives
- C07C7/04—Purification; Separation; Use of additives by distillation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0061—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for phase-change applications
- F28D2021/0063—Condensers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Physics & Mathematics (AREA)
- Water Supply & Treatment (AREA)
- Thermal Sciences (AREA)
- Separation By Low-Temperature Treatments (AREA)
Abstract
The invention discloses rectification tail gas recovery methods, including cooling cylinder, the inner cavity of cooling cylinder is vertically provided with demarcation plate, the inner cavity of cooling cylinder is from left to right successively separated by demarcation plate pre-chill room, secondary cooling chamber and whole cooling chamber, the inner cavity of pre-chill room is provided with precooling tank, the inner cavity of secondary cooling chamber is provided with time cooling tank, the inner cavity of whole cooling chamber is provided with whole cooling tank, precool tank, the outer circumferential walls of secondary cooling tank and whole cooling tank, which are coiled, condenser pipe, the top input terminal of condenser pipe is connected with water inlet pipe, the bottom output end of condenser pipe is connected with outlet pipe, air inlet pipe is provided on the left of cooling cylinder, the top right side of cooling cylinder is provided with exhaust pipe, precool tank, the bottom of secondary cooling tank and whole cooling tank is provided with drain pipe, the bottom of three groups of drain pipes is provided with vasculum, return pipe is provided on the left of vasculum, Rationally, cooling by multiple groups cooling chamber is recycled for structure of the invention design, is reduced the discharge of polluted gas, is improved air quality.
Description
Technical field
The present invention relates to tail gas recycle technical fields, and in particular to rectification tail gas recovery method.
Background technique
With economic rapid development, the continuous improvement of people's lives, the requirement to environment is higher and higher, and rectifying is to utilize
Each component volatility is different in mixture and a kind of separation process for being separated each component, common equipment have board-like rectifying
Tower and stuffing rectification column, in PVC Production Process, the tail gas that VCM rectification process generates has larger pollution to environment,
Tail gas is recycled using pressure swing adsorption (abbreviation SPA) at present, the cycle period of pressure-swing absorption apparatus is short, absorption
Agent utilization rate is high, and adsorbent amount is few, does not need to change heating equipment outside, largely compared with of low pollution, reduces consumption, therefore
It is widely used in the separation and purification of a large amount of multicomponent gases.
The tail gas that VCM rectification process generates mainly has vinyl chloride, hydrogen, ethylene and nitrogen, passes through pressure-swing absorption apparatus
Only hydrogen is recycled, nitrogen, vinyl chloride and ethylene are directly discharged in atmosphere, and vinyl chloride and ethylene are discharged into
In air a degree of pollution can be caused to atmosphere and water body.
Summary of the invention
It is an object of the invention to overcome the above-mentioned problems in the prior art, a kind of rectification tail gas recovery side is provided
Method, reduces vinyl chloride and ethylene is discharged into air, and reduction is polluted caused by atmosphere.
To realize above-mentioned technical purpose and the technique effect, the present invention is achieved through the following technical solutions:
Rectification tail gas recovery method, including cooling cylinder, the inner cavity of the cooling cylinder are vertically provided with demarcation plate, the cooling cylinder
Inner cavity is from left to right successively separated by demarcation plate pre-chill room, secondary cooling chamber and whole cooling chamber, the pre-chill room it is interior
Chamber is provided with precooling tank, and the inner cavity of the secondary cooling chamber is provided with time cooling tank, and the inner cavity of the end cooling chamber is provided with end
Cooling tank, the outer circumferential walls for precooling tank, secondary cooling tank and whole cooling tank, which are coiled, condenser pipe, the top of the condenser pipe
Portion's input terminal is connected with water inlet pipe, and the top of cooling cylinder is run through at the top of water inlet pipe, and the bottom output end of the condenser pipe connects
It is connected to outlet pipe, and the bottom of cooling cylinder is run through in the bottom of outlet pipe, and water inlet pipe runs through the top of cooling cylinder, the precooling
Between tank and secondary cooling tank, Z-shaped gas-guide tube is communicated between secondary cooling tank and whole cooling tank, the top for precooling tank is defeated
Outlet is connected by Z-shaped gas-guide tube with the bottom input end of time cooling tank, and the top output port of the secondary cooling tank passes through Z-shaped
Gas-guide tube is connected with the bottom input end of whole cooling tank, and air inlet pipe, and the right side of air inlet pipe are provided on the left of the cooling cylinder
Side is connected to the bottom left inlet end for precooling tank, and the top right side of the cooling cylinder is provided with exhaust pipe, and exhaust pipe
Bottom is connected to the top vent end of whole cooling tank, and the bottom for precooling tank, secondary cooling tank and whole cooling tank is provided with
Drain pipe, and the bottom of cooling cylinder is run through at the top of drain pipe, the bottom of drain pipe described in three groups is provided with vasculum, described to adopt
The inner cavity top of header is provided with cleaning sprayer, and the top of cleaning sprayer is connected to extraneous cleaning pipe, a left side for the vasculum
Side is provided with return pipe, and the inside of vasculum is extend on the right side of return pipe.
Preferably, in above-mentioned rectification tail gas recovery method, the side wall inner cavity of the cooling cylinder and vasculum be provided with every
Hot insulating layer, the insulating are successively folded from outside to inside by rock wool layer, polyurethane foam material layer and ceramic fiber layer
Add, thermal insulation function is preferably played by rock wool layer, polyurethane foam material layer and ceramic fiber layer, improves cooling
Effect.
Preferably, in above-mentioned rectification tail gas recovery method, the intracavity bottom of the vasculum is ramped shaped, the vasculum
Intracavity bottom left end be lower than right end, and tilt angle is 5 ° -10 °, and the inclination of low-angle, which facilitates, to be collected into vasculum
Liquid tail gas after cooling is flowed back by return pipe continues rectifying in rectifying column.
Preferably, in above-mentioned rectification tail gas recovery method, the junction of the Z-shaped gas-guide tube and demarcation plate is provided with sealing
Plug reduces the air circulation between pre-chill room, secondary cooling chamber and whole cooling chamber by the sealing obstruction of sealing-plug, improves cooling
Effect.
Preferably, in above-mentioned rectification tail gas recovery method, the water inlet pipe, outlet pipe, air inlet pipe, exhaust pipe and return pipe
Outer end face be provided with control valve, flow back by the way that control valve is convenient to air inlet, exhaust, coolant liquid conveying discharge and liquid tail gas
Rate controlled.
Preferably, by water inlet pipe to coolant liquid is conveyed in condenser pipe, the coolant liquid for flowing through condenser pipe is allowed by outlet pipe
Discharge first allows and precools the interior of tank, the inside of secondary cooling tank and whole cooling tank and pre-chill room, secondary cooling chamber and whole cooling chamber
Portion achievees the effect that low-temperature condition, after a period of time, tail gas vinyl chloride, ethylene and the nitrogen being discharged into atmosphere, by into
Tracheae, which is first transported to precool, carries out prepared condensation in tank, a part of vinyl chloride and the ethylene for being condensed into liquid are defeated by drain pipe
It is sent in vasculum and is collected, a part of tail gas is by precooling the Z-shaped gas-guide tube being connected between tank and secondary cooling tank conveying
Continue to condense into secondary cooling tank, the tail gas in Z-shaped gas-guide tube can also be carried out by the pre-chill room of low temperature further
Condensation, then liquid and gaseous tail gas all enters in time cooling tank together, and the continuation of gaseous state tail gas condenses in secondary cooling tank,
Then liquid tail gas is transported in vasculum by drain pipe, and small part gaseous state tail gas passes through between time cooling tank and whole cooling tank
The Z-shaped gas-guide tube of connection is flowed into whole cooling tank, and secondary cooling chamber is equally Z-shaped to being connected between secondary cooling tank and whole cooling tank
The tail gas flowed into gas-guide tube is condensed, and continues the liquid tail gas in whole cooling tank being transported to vasculum by drain pipe
In, the control valve on return pipe is opened, is returned the mixture of the Liquid vinyl chloride being collected into vasculum, ethylene by return pipe
It flows to and continues rectifying in rectifying column, arranged nitrogen and the extremely least a portion of vinyl chloride being mixed in nitrogen, ethylene by exhaust pipe
It is put into air.The pollution to air is reduced, hydro-peening can be carried out by inner cavity of the cleaning sprayer 18 to vasculum 16, reduce liquid
The attachment of state tail gas.
It preferably, is specially 30-50 minutes after described a period of time.
Preferably, Double-filtering device is provided in the cleaning sprayer.
Compared with prior art, beneficial effects of the present invention are as follows:
Structure of the invention design rationally, on the one hand passes through the multi-stage condensing of precooling tank, secondary cooling tank and whole cooling tank, Yi Jitong
Cross the condensation of pre-chill room, secondary cooling chamber and whole cooling chamber to Z-shaped gas-guide tube, vinyl chloride in re-liquefied Tail Gas as much as possible and
Ethylene, while more heats are taken away with the collective effect of input from top to bottom of coolant liquid by inputting from bottom to top for tail gas,
Cooling effect is improved, the content for being discharged into vinyl chloride and ethylene in air is reduced, the liquefied chlorine on the other hand collecting collecting box
Ethylene and mixture of ethylene are flowed back by return pipe continues rectifying in rectifying column, recycle, improve the utilization rate of resource, subtract
Few pollution to environment.
Certainly, it implements any of the products of the present invention and does not necessarily require achieving all the advantages described above at the same time.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, will be described below to embodiment required
Attached drawing is briefly described, it should be apparent that, drawings in the following description are only some embodiments of the invention, for ability
For the those of ordinary skill of domain, without creative efforts, it can also be obtained according to these attached drawings other attached
Figure.
Fig. 1 is using state structure diagram of the invention；
Fig. 2 is the structural schematic diagram of insulating of the invention；
In attached drawing, parts list represented by the reference numerals are as follows:
1- cooling cylinder, 2- demarcation plate, 3- pre-chill room, 4- cooling chamber, 5- end cooling chamber, 6- precooling tank, 7- cooling tank,
8- end cooling tank, 9- condenser pipe, 10- water inlet pipe, 11- outlet pipe, 12-Z shape gas-guide tube, 13- air inlet pipe, 14- exhaust pipe, 15-
Drain pipe, 16- vasculum, 17- cleaning sprayer, 18- return pipe, 19- insulating, 1901- rock wool layer, 1902- polyurethane
Foamed material layer, 1903- ceramic fiber layer.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts all other
Embodiment shall fall within the protection scope of the present invention.
It please refers to shown in Fig. 1-2, rectification tail gas recovery method, including cooling cylinder 1, the inner cavity of cooling cylinder 1 is vertically provided with
Demarcation plate 2, the inner cavity of cooling cylinder 1 is from left to right successively separated by demarcation plate 2 pre-chill room 3, secondary cooling chamber 4 and cooling eventually
Room 5, the inner cavity of pre-chill room 3, which is provided with, precools tank 6, and the inner cavity of secondary cooling chamber 4 is provided with time cooling tank 7, whole cooling chamber 5
Inner cavity is provided with whole cooling tank 8, and the outer circumferential walls for precooling tank 6, secondary cooling tank 7 and whole cooling tank 8, which are coiled, condenser pipe 9,
The top input terminal of condenser pipe 9 is connected with water inlet pipe 10, and the top of cooling cylinder 1, condenser pipe 9 are run through in the top of water inlet pipe 10
Bottom output end be connected with outlet pipe 11, and the bottom of cooling cylinder 1 is run through in the bottom of outlet pipe 11, and water inlet pipe 10 is through cold
The top of solidifying case 1 precools between tank 6 and secondary cooling tank 7, is communicated with Z-shaped air guide between secondary cooling tank 7 and whole cooling tank 8
Pipe 12, the top output port for precooling tank 6 are connected by Z-shaped gas-guide tube 12 with the bottom input end of time cooling tank 7, secondary cooling
The top output port of tank 7 is connected by Z-shaped gas-guide tube 12 with the bottom input end of whole cooling tank 8, Z-shaped gas-guide tube 12 and separation
The junction of plate 2 is provided with sealing-plug, reduces pre-chill room 3, secondary cooling chamber 4 and whole cooling chamber by the sealing obstruction of sealing-plug
Air circulation between 5 improves cooling effect, and the left side of cooling cylinder 1 is provided with air inlet pipe 13, and the right side of air inlet pipe 13 and pre-
The bottom left inlet end of cooling tank 6 is connected to, and the top right side of cooling cylinder 1 is provided with exhaust pipe 14, and the bottom of exhaust pipe 14
It is connected to the top vent end of whole cooling tank 8, the bottom for precooling tank 6, secondary cooling tank 7 and whole cooling tank 8 is provided with drain
Pipe 15, and the bottom of cooling cylinder 1 is run through at the top of drain pipe 15, the bottom of three groups of drain pipes 15 is provided with vasculum 16, condenses
The side wall inner cavity of case 1 and vasculum 16 is provided with insulating 19, and insulating 19 is by rock wool layer 1901, polyurethane
Foamed material layer 1902 and ceramic fiber layer 1903 are sequentially overlapped from outside to inside, pass through rock wool layer 1901, polyurethane foam
Thermal insulation function is preferably played in the superposition of material layer 1902 and ceramic fiber layer 1903, improves cooling effect, vasculum 16
Inner cavity top be provided with cleaning sprayer 17, and the top of cleaning sprayer 17 is connected to extraneous cleaning pipe, the left side of vasculum 16
It is provided with return pipe 18, and the right side of return pipe 18 extend into the inside of vasculum 16, water inlet pipe 10, outlet pipe 11, air inlet pipe
13, the outer end face of exhaust pipe 14 and return pipe 18 is provided with control valve, convenient to air inlet, exhaust, coolant liquid by control valve
The rate of conveying discharge and the reflux of liquid tail gas is controlled, and the intracavity bottom of vasculum 16 is ramped shaped, vasculum 16 it is interior
Bottom of chamber portion left end is lower than right end, and tilt angle is 5 ° -10 °, and the inclination of low-angle facilitates cold by what is be collected into vasculum 16
But the liquid tail gas after is flowed back by return pipe 18 continues rectifying in rectifying column.
One concrete application of the present embodiment are as follows: structure of the invention design is reasonable, by water inlet pipe 10 to defeated in condenser pipe 9
Coolant liquid is sent, the coolant liquid for flowing through condenser pipe 9 is allowed to be discharged by outlet pipe 11, first allows precooling tank 6, secondary cooling tank 7 and end cold
But the inside of the inside of tank 8 and pre-chill room 3, secondary cooling chamber 4 and whole cooling chamber 5 achievees the effect that low-temperature condition, at one section
Between after, tail gas vinyl chloride, ethylene and the nitrogen being discharged into atmosphere, by air inlet pipe 13 first be transported to precool tank 6 in into
Row preparation condensation, a part of vinyl chloride and ethylene for being condensed into liquid are transported in vasculum 16 by drain pipe 15 to be received
Collection, a part of tail gas are transported to time relaying of cooling tank 7 by precooling the Z-shaped gas-guide tube 12 being connected between tank 6 and secondary cooling tank 7
Continuous condensation, can also further condense the tail gas in Z-shaped gas-guide tube 12, then by the pre-chill room 3 of low temperature
Liquid and gaseous tail gas all enters in time cooling tank 7 together, and the continuation of gaseous state tail gas condenses in secondary cooling tank 7, then liquid
Tail gas is transported in vasculum 16 by drain pipe 15, and small part gaseous state tail gas passes through to be connected between time cooling tank 7 and whole cooling tank 8
Logical Z-shaped gas-guide tube 12 is flowed into whole cooling tank 8, and secondary cooling chamber 4 is equally connected to between secondary cooling tank 7 and whole cooling tank 8
Z-shaped gas-guide tube 12 in the tail gas that flows into condensed, continued by drain pipe 15 by the liquid tail gas conveying in whole cooling tank 8
Into vasculum 16, the control valve on return pipe 18, the liquid chloroethene that will be collected into vasculum 16 by return pipe 18 are opened
Alkene, ethylene mixture flow back into and continue rectifying in rectifying column, by nitrogen and be mixed in few in nitrogen by exhaust pipe 14
Partial vinyl chloride, ethylene are discharged into air, reduce the pollution to air, can be by cleaning sprayer 18 to vasculum 16
Inner cavity carries out hydro-peening, reduces the attachment of liquid tail gas.
In the description of this specification, the description of reference term " one embodiment ", " example ", " specific example " etc. means
Particular features, structures, materials, or characteristics described in conjunction with this embodiment or example are contained at least one implementation of the invention
In example or example.In the present specification, schematic expression of the above terms may not refer to the same embodiment or example.
Moreover, particular features, structures, materials, or characteristics described can be in any one or more of the embodiments or examples to close
Suitable mode combines.
Present invention disclosed above preferred embodiment is only intended to help to illustrate the present invention.There is no detailed for preferred embodiment
All details are described, are not limited the invention to the specific embodiments described.Obviously, according to the content of this specification,
It can make many modifications and variations.These embodiments are chosen and specifically described to this specification, is in order to better explain the present invention
Principle and practical application, so that the technical field technical staff be enable to better understand and utilize the present invention.The present invention is only
It is limited by claims and its full scope and equivalent.
Claims (6)
1. rectification tail gas recovery method, it is characterised in that: exhaust gas recovery system includes cooling cylinder (1), the cooling cylinder (1) it is interior
Chamber is vertically provided with demarcation plate (2), and the inner cavity of the cooling cylinder (1) is from left to right successively separated by demarcation plate (2) pre-cooling
But room (3), secondary cooling chamber (4) and whole cooling chamber (5), the inner cavity of the pre-chill room (3), which is provided with, precools tank (6), described
The inner cavity of secondary cooling chamber (4) is provided with time cooling tank (7), and the inner cavity of the end cooling chamber (5) is provided with whole cooling tank (8), institute
The outer circumferential walls for stating precooling tank (6), secondary cooling tank (7) and whole cooling tank (8), which are coiled, condenser pipe (9), the condenser pipe
(9) top input terminal is connected with water inlet pipe (10), and the top of cooling cylinder (1) is run through at the top of water inlet pipe (10), described cold
The bottom output end of solidifying pipe (9) is connected with outlet pipe (11), and the bottom of cooling cylinder (1) is run through in the bottom of outlet pipe (11), and
Water inlet pipe (10) runs through the top of cooling cylinder (1), between the precoolings tank (6) and secondary cooling tank (7), secondary cooling tank (7) and
It is communicated with Z-shaped gas-guide tube (12) between whole cooling tank (8), the top output port for precooling tank (6) passes through Z-shaped gas-guide tube
(12) it is connected with the bottom input end of time cooling tank (7), the top output port of the secondary cooling tank (7) passes through Z-shaped gas-guide tube
(12) it is connected with the bottom input end of whole cooling tank (8), is provided with air inlet pipe (13) on the left of the cooling cylinder (1), and into
The right side of tracheae (13) is connected to the bottom left inlet end for precooling tank (6), and the top right side of the cooling cylinder (1) is provided with
Exhaust pipe (14), and the bottom of exhaust pipe (14) is connected to the top vent end of whole cooling tank (8), it is the precooling tank (6), secondary
The bottom of cooling tank (7) and whole cooling tank (8) is provided with drain pipe (15), and cooling cylinder is run through at the top of drain pipe (15)
(1) bottom, the bottom of drain pipe described in three groups (15) are provided with vasculum (16), and the inner cavity top of the vasculum (16) is set
It is equipped with cleaning sprayer (17), and the top of cleaning sprayer (17) is connected to extraneous cleaning pipe, is set on the left of the vasculum (16)
It is equipped with return pipe (18), and extend into the inside of vasculum (16) on the right side of return pipe (18).
2. rectification tail gas recovery method according to claim 1, it is characterised in that: the cooling cylinder (1) and vasculum
(16) side wall inner cavity is provided with insulating (19), and the insulating (19) is by rock wool layer (1901), poly- ammonia
Ester foaming material layer (1902) and ceramic fiber layer (1903) are sequentially overlapped from outside to inside.
3. rectification tail gas recovery method according to claim 1, it is characterised in that: the intracavity bottom of the vasculum (16)
For ramped shaped, the intracavity bottom left end of the vasculum (16) is lower than right end, and tilt angle is 5 ° -10 °.
4. rectification tail gas recovery method according to claim 1, it is characterised in that: the specific method is as follows: passing through water inlet pipe
To coolant liquid is conveyed in condenser pipe, allows the coolant liquid for flowing through condenser pipe to be discharged by outlet pipe, first allow and precool tank, secondary cooling tank
Achieve the effect that low-temperature condition with the inside of the inside of whole cooling tank and pre-chill room, secondary cooling chamber and whole cooling chamber, one section
After time, tail gas vinyl chloride, ethylene and the nitrogen being discharged into atmosphere are first transported in precooling tank by air inlet pipe and are carried out
Preparation condensation, a part of vinyl chloride and ethylene for being condensed into liquid are transported in vasculum by drain pipe and are collected, and one
Divide tail gas to continue to condense by precooling the Z-shaped gas-guide tube being connected between tank and secondary cooling tank and being transported in time cooling tank, passes through
The pre-chill room of low temperature can also further condense the tail gas in Z-shaped gas-guide tube, then liquid and gaseous tail
Gas all enters in time cooling tank together, and the continuation of gaseous state tail gas condenses in secondary cooling tank, and then liquid tail gas is defeated by drain pipe
It is sent in vasculum, small part gaseous state tail gas passes through the Z-shaped gas-guide tube being connected between time cooling tank and whole cooling tank and is flowed into end
In cooling tank, secondary cooling chamber equally carries out the tail gas flowed into the Z-shaped gas-guide tube being connected between secondary cooling tank and whole cooling tank
Condensation, continues for the liquid tail gas in whole cooling tank to be transported in vasculum by drain pipe, opens the control valve on return pipe,
The mixture of the Liquid vinyl chloride being collected into vasculum, ethylene is flowed back by return pipe and continues rectifying in rectifying column, is led to
It crosses exhaust pipe nitrogen and the extremely least a portion of vinyl chloride, the ethylene that are mixed in nitrogen are discharged into air.
5. rectification tail gas recovery method according to claim 4, it is characterised in that: be specially 30- after described a period of time
50 minutes.
6. rectification tail gas recovery method according to claim 4, it is characterised in that: be provided with bilayer in the cleaning sprayer
Filter device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811468626.XA CN109646982A (en) | 2018-12-03 | 2018-12-03 | Rectification tail gas recovery method |
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|---|---|---|---|
| CN201811468626.XA CN109646982A (en) | 2018-12-03 | 2018-12-03 | Rectification tail gas recovery method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111804095A (en) * | 2020-08-12 | 2020-10-23 | 河北医药化工设计有限公司 | A exhaust treatment device for processing of traditional chinese medicine plaster |
| CN112033178A (en) * | 2020-09-07 | 2020-12-04 | 边会婷 | Condensing equipment that exhaust-gas treatment used |
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| CN112033178A (en) * | 2020-09-07 | 2020-12-04 | 边会婷 | Condensing equipment that exhaust-gas treatment used |
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Application publication date: 20190419 |