CN109140468A - The system that the tail gas generated during a kind of pair of production vinyl chloride is recycled - Google Patents
The system that the tail gas generated during a kind of pair of production vinyl chloride is recycled Download PDFInfo
- Publication number
- CN109140468A CN109140468A CN201811152452.6A CN201811152452A CN109140468A CN 109140468 A CN109140468 A CN 109140468A CN 201811152452 A CN201811152452 A CN 201811152452A CN 109140468 A CN109140468 A CN 109140468A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- temperature flue
- absorber
- low
- tower
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G7/00—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals
- F23G7/06—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases
-
- 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
- B01D53/14—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 absorption
- B01D53/1456—Removing acid components
-
- 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
- B01D53/14—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 absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/1892—Systems therefor not provided for in F22B1/1807 - F22B1/1861
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
- F23J15/025—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow using filters
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/20—Halogens or halogen compounds
- B01D2257/204—Inorganic halogen compounds
- B01D2257/2045—Hydrochloric acid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G2209/00—Specific waste
- F23G2209/14—Gaseous waste or fumes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2217/00—Intercepting solids
- F23J2217/10—Intercepting solids by filters
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Treating Waste Gases (AREA)
- Gas Separation By Absorption (AREA)
Abstract
The invention discloses the systems that the tail gas generated during a kind of vinyl chloride to production is recycled, it include: combustion chamber, boiler, heat exchanger, absorber and caustic wash tower, the combustion chamber generates high-temperature flue gas for making the tail gas burn in the combustion chamber with combustion air；The boiler and heat exchanger obtain low-temperature flue gas, and recycle to the heat of the high-temperature flue gas, generate steam for cooling down to the high-temperature flue gas；The absorber is used to absorb the HCl in the low-temperature flue gas, obtains dilute hydrochloric acid solution；Alkaline detergent solution is accommodated in the caustic wash tower, for being washed to the flue gas come out from the absorber, HCl remaining in the flue gas is neutralized by acid-base neutralization reaction, and absorb the Cl in flue gas2.The system that the tail gas generated during a kind of vinyl chloride to production provided by the invention is recycled, operation is simple and reliable, has high energy utilization rate and tail gas recycle treatment effeciency.
Description
Technical field
The invention belongs to Chemical Manufacture technical field of resource comprehensive utilization, more particularly, to one kind to production vinyl chloride
The system that the tail gas generated in the process is recycled.
Background technique
The production of vinyl chloride (VCM) mostly uses ethylene process, ethylene and chlorine is passed through in chlorination reactor, in ferric trichloride
It is generated under catalytic action thick dichloroethanes (EDC), the heat vapour that thick EDC is released in chlorination reactor by autoreactivity
Change, distillate at the top of chlorination reactor into EDC high boiling tower in the form of a vapor, is generated in EDC high boiling tower except dereaction
Essence EDC, storage to EDC storage tank, with gaseous shape after the EDC in EDC storage tank is vaporized by steam is made in stripping after high-boiling components
Formula is sent into EDC pyrolysis furnace, and cracking reaction occurs and generates thick vinyl chloride and hydrogen chloride, is then passed through chilling tower, dehydrochlorination tower again
Meet the required vinyl chloride of polymerization with being made after VCM stripper.Meanwhile during producing vinyl chloride, from chlorination reactor,
A large amount of tail gas can be discharged in EDC high boiling tower, EDC storage tank, dehydrochlorination tower and VCM stripper, containing a large amount of in these tail gas
The poisonous and hazardous gas such as EDC, VCM, acetylene, chlorine, ethylene, HCl, cannot directly empty.
In traditional handicraft, frequently with water absorb and Alkali absorption method to production vinyl chloride during generate tail gas into
It is directly emptied after row processing, while the waste water for absorbing generation enters waste water treatment system.This processing method can generate largely
Waste water, it is extremely unfriendly to environment, while the ingredients such as EDC, VCM do not efficiently use in tail gas, cause great energy waste.
Summary of the invention
For this technical deficiency, the present invention provide it is a kind of to production vinyl chloride during generate tail gas carry out at recycling
The system of reason, by burning to the tail gas, recycling heat generates steam, then absorbs in the flue gas generated after burning
HCl gas, obtains technical hydrochloric acid, has greatly played the utility value of tail gas, by treated tail gas non-pollution discharge.
To achieve the above object, the invention provides the following technical scheme:
The present invention provides a kind of system that the tail gas generated in the process to production vinyl chloride is recycled, comprising: combustion
Room, boiler, heat exchanger, absorber and caustic wash tower are burnt, the combustion chamber is for making the tail gas and combustion air in the burning
Indoor Combustion generates high-temperature flue gas；The boiler and heat exchanger obtain low temperature cigarette for cooling down to the high-temperature flue gas
Gas, and the heat of the high-temperature flue gas is recycled, generate steam；The absorber is for absorbing in the low-temperature flue gas
HCl obtains dilute hydrochloric acid solution；Alkaline detergent solution is accommodated in the caustic wash tower, for the flue gas come out from the absorber
It is washed, HCl remaining in the flue gas is neutralized by acid-base neutralization reaction, and absorb the Cl2 in flue gas.
According to embodiment of the present invention, wherein the tail gas include dichloroethanes, vinyl chloride, acetylene, chlorine,
It is one or more in ethylene, HCl.
According to embodiment of the present invention, wherein the boiler and heat exchanger are used to carry out the high-temperature flue gas
Cooling, obtains low-temperature flue gas, and recycle to the heat of the high-temperature flue gas, generates steam, comprising: the boiler is first to height
Warm flue gas cools down, then so that high-temperature flue gas is entered the heat exchanger and further cool down, and obtains low-temperature flue gas；The heat exchanger is first
Deaerated water is preheated, then deaerated water is made to enter the boiler, is vaporizated into steam after absorbing heat.
According to embodiment of the present invention, wherein the absorber includes first absorber and secondary absorber, and two
Grade absorber series connection absorbs the HCl in the low-temperature flue gas, obtains dilute hydrochloric acid solution.
According to embodiment of the present invention, wherein the first absorber and secondary absorber are each configured with suction
Return line is received, the absorption return line, which is equipped with, absorbs reflux pump and absorption return tank.
It according to embodiment of the present invention, further include filter, the filter is connect with the heat exchanger, is used
It is filtered in the low-temperature flue gas, removes the impurity in the low-temperature flue gas.
It according to embodiment of the present invention, further include enrichment absorber, the enrichment absorber is used for described
Dilute hydrochloric acid solution carries out enrichment, obtains the technical hydrochloric acid of concentration >=30%.
It according to embodiment of the present invention, further include chilling tower, the chilling tower and the first absorber connect
It connects, for doing quenching before entering the first absorber to the low-temperature flue gas.
According to embodiment of the present invention, wherein the tower top of the chilling tower is provided with spray nozzle, is used for described
Shower water is sprayed in chilling tower, so that shower water and the low-temperature flue gas co-flow is entered the chilling tower, is absorbed the low temperature
The heat of flue gas.
According to embodiment of the present invention, wherein the shower water is discharged from the tower bottom of the chilling tower, into institute
State the absorption return line of absorber.
The system that is recycled of tail gas generated during a kind of vinyl chloride to production provided by the invention, have with
Lower advantage: by burning to the tail gas, recycling heat generates steam, improves energy utilization rate；It is generated after absorbing burning
Flue gas in HCl gas, obtain technical hydrochloric acid, improve the recycling efficiency of tail gas；Treated, and flue gas reaches national row
Standard is put, atmosphere is directly discharged into, it is pollution-free to atmosphere；Opposite traditional handicraft, the wastewater flow rate of generation is less, and therefore, the present invention mentions
The system that the tail gas generated during a kind of vinyl chloride to production supplied is recycled, operation is simple and reliable, has high
Energy utilization rate and tail gas recycle treatment effeciency.
Detailed description of the invention
Fig. 1 is the process flow chart of tail gas recycle provided by the invention processing.
Fig. 2 is provided by the invention include chilling tower and enrichment absorber tail gas recycle processing process flow chart.
Specific embodiment
The preferred embodiments of the present invention will be described in detail with reference to the accompanying drawing, and reference label refers to the group in the present invention
Part, technology, realizing under appropriate circumstances so as to advantages and features of the invention can be easier to be understood.Following description is pair
The materialization of the claims in the present invention, and other specific implementations not clearly stated relevant to claim also belong to power
The range that benefit requires.The present invention will be described in detail combined with specific embodiments below.
Fig. 1 shows the flow chart of the tail gas recycle processing provided according to the present invention.
As shown in Figure 1, what the tail gas generated during a kind of vinyl chloride to production provided by the invention was recycled
System, comprising: combustion chamber 1, boiler 2, heat exchanger 3, absorber 4 and caustic wash tower 5, the combustion chamber 1 for make the tail gas with
Combustion air burns in the combustion chamber 1, generates high-temperature flue gas；The boiler 2 and heat exchanger 3 are used for the high-temperature flue gas
Cool down, obtain low-temperature flue gas, and recycle to the heat of the high-temperature flue gas, generates steam；The absorber 4 is used for
The HCl in the low-temperature flue gas is absorbed, dilute hydrochloric acid solution is obtained；Accommodate alkaline detergent solution in the caustic wash tower 5, for from
The flue gas that the absorber comes out is washed, and HCl remaining in flue gas is neutralized by acid-base neutralization reaction, and absorb cigarette
Cl in gas2。
Method provided by the invention, wherein the tail gas includes dichloroethanes, vinyl chloride, acetylene, chlorine, ethylene, HCl
In it is one or more.These types of substance is poisonous and hazardous substance, cannot directly be emptied, in order to avoid environmental pollution is caused, therefore
It needs to be recycled it.
It is sent into combustion chamber 1 after these tail gas are collected by pipeline, is burning with the combustion air for being sent into combustion chamber 1 simultaneously
Burning in room 1, temperature are controlled at 1000 DEG C to 1100 DEG C or so, its exhaust combustion is made to generate H2O, HCl and CO2, there are also a large amount of
N2With part surplus O2And a small amount of Cl2.Natural gas need to be used when igniting, heating and the less tail gas amount in combustion chamber 1
With burning, coming into operation for natural gas is temperature (1000 DEG C to 1100 DEG C) and preceding system (Vinyl Chloride Production System) according to combustion chamber 1
Depending on produce load and degree of stability.
Method provided by the invention, wherein the boiler 2 and heat exchanger 3 are obtained for cooling down to the high-temperature flue gas
It is recycled to low-temperature flue gas, and to the heat of the high-temperature flue gas, generates steam, comprising: the boiler 2 is first to high-temperature flue gas
Cool down, then high-temperature flue gas is made to enter the further cooling of heat exchanger 3, obtains low-temperature flue gas；The heat exchanger 3 is first right
Deaerated water is preheated, then deaerated water is made to enter the boiler 2, is vaporizated into steam after absorbing heat.
High-temperature flue gas after burning is first sent into boiler 2, after its major part heat is carried out the steam that recycling generates 2.8MPa
By heat exchanger 3, indirectly with deaerated water by flue gas cool-down to 200 DEG C hereinafter, obtaining low-temperature flue gas.Deaerated water passes through heat exchanger 3
It is sent into after boiler 2 further absorbs heat afterwards and generates the steam of 2.8MPa.The steam of generation inputs steam pipe network system, comes into operation in chloroethene
In alkene production process in the heating of various towers, the heating of office building and other techniques equipment heating etc..Deaerated water is main
For 2 water supply of boiler, it is therefore an objective to prevent the oxygen corrosion of boiler 2.Preferably, after by the way that desalted water is passed through the processing of deoxygenation water station 6
Deaerated water is obtained, in input heat exchanger 3, to prevent its from corroding equipment.
Method provided by the invention, wherein the absorber 4 includes first absorber 41 and secondary absorber 42, two-stage
Absorber series connection absorbs the HCl in the low-temperature flue gas, obtains dilute hydrochloric acid solution.Preferably, the two-stage absorber of use is
Graphite falling film absorber, to prevent absorber by acid liquid corrosion, the working method of two-stage absorber is completely the same, and two-stage is arranged
The purpose of absorber is to sufficiently recycle the HCl gas in low-temperature flue gas.
Method provided by the invention, wherein the first absorber 41 and secondary absorber 42 are each configured with and absorb back
Flow tube road, the absorption return line, which is equipped with, absorbs reflux pump and absorption return tank.Two-stage absorber configures absorption reflux
Pipeline, so that absorbing liquid circulates from top to bottom in the absorber 4.The low-temperature flue gas and absorbing liquid enter in the same direction inhales
The tube side of device 4 is received, in tube side, flue gas comes into full contact with absorbing liquid, and it is dissolved in the HCl gas in flue gas in absorbing liquid, from
And obtain dilute hydrochloric acid solution.Preferably, select desalted water as absorbing liquid.Simultaneously because it is that heat release is anti-that HCl gas, which is dissolved in water,
It answers, therefore the shell side in absorber 4 is provided with recirculated cooling water, can take away the heat of releasing by cooling water.
The flue gas come out from the secondary absorber 42 enters the caustic wash tower 5, with alkaline detergent solution such as sodium hydroxide and
Sodium sulfite etc. efficiently carries out final carrying out washing treatment to flue gas, by acid-base neutralization reaction that the remnants in flue gas are few
HCl gas neutralizes, and the Cl in flue gas2It sponges, flue gas is made to reach national emission standard, be directly discharged into atmosphere, meanwhile,
The waste water of generation enters waste water treatment system.In the method, since most of HCl gas in flue gas is all absorbed by liquid absorption,
The remaining HCl gas for needing to neutralize is seldom, thus the wastewater flow rate generated also compare traditional handicraft amount it is few very much.
Fig. 2 shows it is provided by the invention include chilling tower and enrichment absorber tail gas recycle processing process flow
Figure.
As shown in Fig. 2, method provided by the invention, further includes filter 7, the filter 7 connects with the heat exchanger 3
It connects, for being filtered to the low-temperature flue gas, removes the impurity in the low-temperature flue gas.During exhaust combustion, it can produce
Raw carbon black, as flue gas enters subsequent process, setting filter 7 is in order to remove the impurity in low-temperature flue gas, to make
Purer technical hydrochloric acid is obtained in process below.Preferably, the filter of selection is active carbon filter.
Method provided by the invention further includes enrichment absorber 8, and the enrichment absorber 8 is used for the dilute hydrochloric acid
Solution carries out enrichment, obtains the technical hydrochloric acid of concentration >=30%.The enrichment absorber 8 is configured with enrichment return line, described
Enrichment return line is equipped with enrichment reflux pump and enrichment return tank, so that dilute hydrochloric acid enters enrichment absorber and carries out enrichment.?
It absorbs in return line, by the concentration of HCl gas in sampling analysis absorbing liquid, when the concentration of HCl gas in absorbing liquid reaches
When 20%, then enrichment return line is transported to by enrichment pump as dilute hydrochloric acid solution.In enrichment absorber 8, by dilute hydrochloric acid
It is passed through enrichment absorber 8 simultaneously with HCl gas, by cyclic absorption, the concentration of hydrochloric acid is gradually mentioned, work is guaranteed with this
The concentration of industry hydrochloric acid is not less than 30%.Since enrichment absorber 8 is exothermic reaction during absorption, need to use circulating cooling
The heat that water is released is taken away.The technical hydrochloric acid of production can be used for the production technology of vinyl chloride or entrucking is sold outside.
Method provided by the invention further includes chilling tower 9, and the chilling tower 9 is connect with the first absorber 41, is used
In to the low-temperature flue gas enter the first absorber 41 before do quenching.Due to what is come out from the heat exchanger 3
The temperature of low-temperature flue gas, hereinafter, if being directly entered the first absorber 41, will lead in first absorber 41 at 200 DEG C
The excessively high evaporation of absorbing liquid temperature, and it is unfavorable for the absorption to HCl gas in flue gas, therefore the low-temperature flue gas is entering described one
It needs to enter chilling tower 9 before grade absorber 41, does quenching.
Method provided by the invention, wherein the tower top of the chilling tower 9 is provided with spray nozzle, is used for the chilling tower 9
Interior sprinkling shower water makes shower water and the low-temperature flue gas co-flow enter the chilling tower, absorbs the low-temperature flue gas
Heat.Since gas is longer than the time needed for entering tower top outflow from tower bottom from the time that tower top enters needed for tower bottom flows out,
So in order to keep the time of contact of shower water and the low-temperature flue gas longer, shower water and the low-temperature flue gas are from chilling tower 9
Tower top co-flow enters in tower.Preferably, select desalted water as shower water, in 9 top quench zone of chilling tower, desalted water by
Tower top spray nozzle is atomized into the droplet of umbrella, uniformly sprays into chilling tower 9, with the low-temperature flue gas co-flow entered in tower
It contacts with each other and carries out heat exchange and mass transfer.For two-phase in heat transfer process, the water evaporation in a part of liquid phase is converted into water vapour, absorbs
Most of heat, while desalination coolant-temperature gage increases, and draws the partial heat of flue gas, so that the temperature of flue gas is greatly reduced,
80 DEG C or so can be dropped to, that is, is achieved the purpose that flue gas chilling.Meanwhile shower water is with low-temperature flue gas during contacting,
The HCl gas that the low-temperature flue gas can be dissolved, achievees the purpose that mass transfer.The band generated when pressure oscillation in order to prevent is corrosive
Salt acid fog liquid to the pipeline anti-channeling of chilling tower air inlet, cause equipment to corrode, the pipeline and chilling tower tower body of air inlet
Using the graphite material of hydrochloric acid corrosion resistant, operating temperature range is being allowed to run for protection graphite chilling tower, in chilling tower shell
Water-cooling jacket is arranged in outside, cools down to graphite body.There is recirculated cooling water in water-cooling jacket, the heat exchange of flue gas and desalted water is negative
Lotus a part is taken away by cooling water.
Method provided by the invention, wherein the shower water is discharged from the tower bottom of the chilling tower 9, into the absorption
The absorption return line of device.The shower water absorbs the heat of low-temperature flue gas in the chilling tower 9, has dissolved low-temperature flue gas
In HCl gas after, not instead of directly as waste water be discharged, enter the absorber absorption return line in, as
Absorbing liquid recycling.
The system that is recycled of tail gas generated during a kind of vinyl chloride to production provided by the invention, have with
Lower advantage: by burning to the tail gas, recycling heat generates steam, improves energy utilization rate；It is generated after absorbing burning
Flue gas in HCl gas, obtain technical hydrochloric acid, improve the recycling efficiency of tail gas；Treated, and flue gas reaches national row
Standard is put, atmosphere is directly discharged into, it is pollution-free to atmosphere；Opposite traditional handicraft, the wastewater flow rate of generation is less, and therefore, the present invention mentions
The system that the tail gas generated during a kind of vinyl chloride to production supplied is recycled, operation is simple and reliable, has high
Energy utilization rate and tail gas recycle treatment effeciency.
It should be noted that the above-mentioned embodiments illustrate rather than limit the invention, and this
Field technical staff can be designed alternative embodiment without departing from the scope of the appended claims.In claim
In, any reference symbol between parentheses should not be configured to limitations on claims.
Claims (10)
1. the system that the tail gas generated during a kind of vinyl chloride to production is recycled, comprising: combustion chamber (1), boiler
(2), heat exchanger (3), absorber (4) and caustic wash tower (5),
The combustion chamber (1) generates high-temperature flue gas for making the burning in the combustion chamber (1) of the tail gas and combustion air；
The boiler (2) and heat exchanger (3) obtain low-temperature flue gas, and to the height for cooling down to the high-temperature flue gas
The heat of warm flue gas is recycled, and steam is generated；
The absorber (4) is used to absorb the HCl in the low-temperature flue gas, obtains dilute hydrochloric acid solution；
Alkaline detergent solution is accommodated in the caustic wash tower (5), for being washed to the flue gas come out from the absorber, is passed through
Acid-base neutralization reaction neutralizes HCl remaining in the flue gas, and absorbs the Cl in flue gas2。
2. system according to claim 1, wherein the tail gas includes dichloroethanes, vinyl chloride, acetylene, chlorine, second
It is one or more in alkene, HCl.
3. system according to claim 1, wherein the boiler (2) and heat exchanger (3) be used for the high-temperature flue gas into
Row cooling, obtains low-temperature flue gas, and recycle to the heat of the high-temperature flue gas, generates steam, comprising:
The boiler (2) first cools down to high-temperature flue gas, then so that high-temperature flue gas is entered the heat exchanger (3) and further cool down,
Obtain low-temperature flue gas；
The heat exchanger (3) first preheats deaerated water, then deaerated water is made to enter the boiler (2), vaporizes after absorbing heat
For steam.
4. system according to claim 1, wherein the absorber (4) includes that first absorber (41) and second level absorb
Device (42), the series connection of two-stage absorber absorb the HCl in the low-temperature flue gas, obtain dilute hydrochloric acid solution.
5. system according to claim 4, wherein the first absorber (41) and secondary absorber (42) are respectively configured
There is absorption return line, the absorption return line, which is equipped with, absorbs reflux pump and absorption return tank.
6. system according to claim 3 further includes filter (7), the filter (7) and the heat exchanger (3)
Connection, for being filtered to the low-temperature flue gas, removes the impurity in the low-temperature flue gas.
7. system according to claim 4 further includes enrichment absorber (8), the enrichment absorber (8) is used for institute
It states dilute hydrochloric acid solution and carries out enrichment, obtain the technical hydrochloric acid of concentration >=30%.
8. system according to claim 4 further includes chilling tower (9), the chilling tower (9) and the first absorber
(41) it connects, for doing quenching before entering the first absorber (41) to the low-temperature flue gas.
9. system according to claim 8, wherein the tower top of the chilling tower (9) is provided with spray nozzle, is used for described
Shower water is sprayed in chilling tower (9), so that shower water and the low-temperature flue gas co-flow is entered the chilling tower (9), is absorbed institute
State the heat of low-temperature flue gas.
10. system according to claim 9, wherein the shower water is discharged from the tower bottom of the chilling tower (9), enters
The absorption return line of the absorber (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811152452.6A CN109140468A (en) | 2018-09-29 | 2018-09-29 | The system that the tail gas generated during a kind of pair of production vinyl chloride is recycled |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811152452.6A CN109140468A (en) | 2018-09-29 | 2018-09-29 | The system that the tail gas generated during a kind of pair of production vinyl chloride is recycled |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109140468A true CN109140468A (en) | 2019-01-04 |
Family
ID=64814040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811152452.6A Pending CN109140468A (en) | 2018-09-29 | 2018-09-29 | The system that the tail gas generated during a kind of pair of production vinyl chloride is recycled |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109140468A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117160221A (en) * | 2023-11-01 | 2023-12-05 | 天津大沽化工股份有限公司 | Method for producing iron-free concentrated hydrochloric acid by purifying and dechlorinating incineration flue gas of chlor-alkali device |
-
2018
- 2018-09-29 CN CN201811152452.6A patent/CN109140468A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117160221A (en) * | 2023-11-01 | 2023-12-05 | 天津大沽化工股份有限公司 | Method for producing iron-free concentrated hydrochloric acid by purifying and dechlorinating incineration flue gas of chlor-alkali device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104548902B (en) | Acetylene gas purifier and technique thereof | |
| CN109297037A (en) | A kind of environment-friendly type resource utilization system of organic exhaust gas containing chlorine | |
| CN102705839A (en) | Incineration disposal system of fluorine-containing waste liquid and waste gas and disposal method thereof | |
| CN104501186A (en) | Treating device and method of waste gas/liquid with high chlorine and fluorine content | |
| CN103292332A (en) | Negative-pressure incineration disposal system and negative-pressure incineration disposal method for fluorine-containing organic waste liquid and exhaust gas | |
| CN211260830U (en) | High-salt-content chlorine-containing organic waste liquid zero-emission resource utilization system | |
| CN210198116U (en) | Tail gas cooling device for gas washing tower of yellow phosphorus electric furnace | |
| WO2013058211A1 (en) | Perfluoride decomposition treatment method and treatment device | |
| CN108862210B (en) | Sulfuric acid concentration system and process | |
| CN109140468A (en) | The system that the tail gas generated during a kind of pair of production vinyl chloride is recycled | |
| CN210398941U (en) | Chlorine-containing waste liquid incineration disposal system | |
| CN110360577A (en) | A kind of processing system of liquid waste incineration containing chlorine | |
| CN204372942U (en) | A kind for the treatment of apparatus of high chloride, waste gas containing fluoride/liquid | |
| CN208139291U (en) | A kind of exhaust gas processing device of waste gas containing fluoride | |
| CN110345496A (en) | A kind of chemical waste liquid burned waste gas processing system | |
| CN109798531A (en) | A kind of device and method of plasma cracking processing organic fluorine residual liquid | |
| CN111780131A (en) | High-chlorine dangerous waste incineration disposal system | |
| CN209161488U (en) | A kind of system of sulfur gas reduction Waste Sulfuric Acid sulfur dioxide liquid and sulfuric acid | |
| CN108317525A (en) | A kind of pharmaceutical technology emission-control equipment and processing method | |
| CN112902196A (en) | High-salt-content chlorine-containing organic waste liquid zero-emission resource utilization system | |
| CN103423752A (en) | Incineration process capable of recycling hydrogen fluoride | |
| CN209341270U (en) | A kind of environment-friendly type resource utilization system of organic exhaust gas containing chlorine | |
| CN212327906U (en) | Lithium battery waste liquid recycling environmental protection processing system | |
| CN211189678U (en) | Tail gas treatment equipment of formaldehyde production system | |
| CN205391786U (en) | Hydrogen fluoride recovery processing device of electrolysis system fluorine negative pole tail gas |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190104 |
|
| RJ01 | Rejection of invention patent application after publication |