CN109939532A - A kind of papermaking waste gas purification reclaimer - Google Patents
A kind of papermaking waste gas purification reclaimer Download PDFInfo
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- CN109939532A CN109939532A CN201910310205.2A CN201910310205A CN109939532A CN 109939532 A CN109939532 A CN 109939532A CN 201910310205 A CN201910310205 A CN 201910310205A CN 109939532 A CN109939532 A CN 109939532A
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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
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Abstract
The present invention relates to a kind of papermaking waste gas purification reclaimers.Including multi-stage condensing knockout tower, rectifying column, drainer, water pump, purification runner, dialysis pond, air-introduced machine and the electrostatic precipitator being connected with pipeline, multilayer insulating panel is equipped in multi-stage condensing knockout tower cavity, every layer of partition end liquid outlet is connected by water pump with rectifying column inlet, and rectifying column gas outlet connects with drainer air inlet.Multi-stage condensing separation column is equipped with gas outlet, and gas outlet is connected by air-introduced machine with the air inlet of electrostatic precipitator, and the gas outlet of electrostatic precipitator is connected to the air inlet of purification runner, and the exhaust outlet for purifying runner leads to nature.The boiling point of this equipment utilization difference organic substance is different, condenses and separates to the different components in exhaust gas, and obtained organic solution is used to purify the organic component in absorption exhaust gas, achievees the purpose that purify exhaust gas.The heat that condensation process obtains is used for rectifying and elevated temperature desorption, achievees the effect that heat energy recycling, energy saving supply.
Description
Technical field
The present invention relates to technical field of environment protection equipment, and in particular to a kind of papermaking waste gas purification reclaimer.
Background technique
As various paper products are fully immersed into our life, paper industry has obtained very fast development, at the same time, papermaking
A large amount of pollutant can be also generated in the process, surrounding enviroment are polluted, and seriously affect the living environment of nearby residents.Papermaking
Industry can generate a large amount of exhaust gas waste water, and wherein exhaust gas is mainly foul smell in pulping process, pulping bleaching and prepares chemical drugs
Exhaust gas caused by product, and the dust that filtering and limekiln generate.Contain hydrogen sulfide, mercaptan, thioether, methanol, chlorine in exhaust gas
The chemical substances such as imitative, acetaldehyde not only have stench and toxicity, and larger to the harm of human and environment, these gases also have corrosion
Property and combustibility, once harm may be caused by draining into atmosphere.
The processing method of papermaking exhaust gas is main on the market at present are as follows: this kind of gas is sent into alkali by sealing transportation system and is returned
It receives furnace to burn, this technology has the disadvantages that 1, burning energy consumption is big, and purified treatment is at high cost；2, alkali recovery furnace industrial and mineral is suitable
Complexity, black liquor composition is varied, and moisture content is high, it is difficult to processing and elimination；3, caustic corrosion extra-heavy, to people and surrounding ring
Border causes damages；4, the adhesiveness of sode ash is extremely strong, and deashing difficulty is too high, the flue gas discharged during ash disposal limited efficacy and ash disposal
Peculiar smell is quite serious, can not be really achieved the existing discharge standard of country；5, the useful organic substance in exhaust gas has burnt nearly
To the greatest extent, recovery efficiency is low.Between the above several points, researches and develops new and high technology cleaner and have been very urgent.
In the prior art, the patent of invention of Publication No. CN106964250A discloses a kind of paper mill exhaust-gas treatment and sets
It is standby, liquefied principle is pre-chilled using the vapor in high-temp waste gas, takes out the nocuousness in the vapor and vapor in exhaust gas
Then substance individually handles the noxious material in exhaust gas.The patent of invention of Publication No. CN107238087A discloses one kind and makes
The highly concentrated foul smell recyclable device of slurry made of paper, recycles the stripping gas that high foul condensate generates with liquid drop separator by condensing.Publication number
For the patent of invention of CN108057320A, a kind of papermaking waste gas purification apparatus and operating method are disclosed, uses spray and more
Grade filtering absorption, comes into full contact with treatment fluid after allowing exhaust gas to disperse, realizes the purification and filtering of exhaust gas.Publication No.
The patent of invention of CN107875770A discloses a kind of novel papermaking waste gas purification remover, and flue gas leading is run through purified water
Cleaned water tank internal liquid level is extended at the top of case hereinafter, and the end of flue gas leading be connected with several tubules, make exhaust gas and water tank
Interior water constituent contact, achievees the purpose that filter fine solid particles in exhaust gas.
In conclusion previous patent mainly in paper-making process exhaust gas or particulate matter carry out condensing recovery, absorption,
The methods of filtering is handled, and can achieve the effect that some of the contaminants are removed.But while pollutant is removed, in exhaust gas
Useful organic substance be also handled simultaneously, do not achieve the effect that recycle and recycle.Secondly, needed in treatment process
The thermal energy needs wanted additionally supply, and can not efficiently use the thermal energy in exhaust gas, and cyclic utilization rate is low, and energy consumption is big.
Summary of the invention
Against the above deficiency, the present invention provides a kind of papermaking waste gas purification reclaimers, can be preferably in exhaust gas
Poisonous and harmful composition separated and eliminated, while separating-purifying and recycling are carried out to useful composition, reached to papermaking
Exhaust-gas treatment and the purpose recycled, energy saving supply reduce energy loss and purified treatment cost.
The technical solution of the present invention is as follows:
A kind of papermaking waste gas purification reclaimer, including multi-stage condensing knockout tower, the rectifying column, condensation being connected with pipeline
Tank, water pump, purification runner, dialysis pond, air-introduced machine and electrostatic precipitator, the multi-stage condensing knockout tower cavity is interior to be equipped with multilayer
The close inside cavities end of partition, every layer of partition is equipped with liquid outlet, and liquid outlet is connected by water pump with rectifying column inlet, institute
Rectifying column gas outlet is stated to connect with drainer air inlet；The multi-stage condensing knockout tower and rectifying column are equipped with waste liquid port, described
Waste liquid port accesses dialysis pond inlet, and the dialysis pond liquid outlet accesses waste liquid pool；The multi-stage condensing separation column is set
There is gas outlet, the gas outlet is connected by air-introduced machine with the air inlet of electrostatic precipitator, and the electrostatic precipitator goes out
Port is connected to the air inlet of purification runner, and the exhaust outlet of the purification runner leads to nature, and leakage fluid dram connects fluid reservoir.
The partition of the multi-stage condensing knockout tower is five layers, the not jljl for most five temperature ranges of refrigerated separation
Matter, the corresponding isolated substance of each temperature range be respectively as follows: 80 DEG C~100 DEG C for separate water, 70 DEG C~80 DEG C be used to separate
Ethyl alcohol, 60 DEG C~70 DEG C for separate chloroform and formaldehyde, 30 DEG C~40 DEG C for separate mercaptan, thioether and dimethyl sulfide, 20 DEG C~
30 DEG C for separating acetaldehyde.
The quantity of the rectifying column is 1~4, for rectification and purification ethyl alcohol, chloroform and formaldehyde, mercaptan, thioether and diformazan
One of sulphur, acetaldehyde are a variety of, and the temperature that the temperature range of every kind of substance of rectifying is respectively as follows: acetaldehyde is 20 DEG C~30 DEG C, sulphur
The temperature of alcohol, thioether and dimethyl sulfide is 30 DEG C~40 DEG C, and the temperature of chloroform and formaldehyde is 60 DEG C~70 DEG C, and the temperature of ethyl alcohol is 70
DEG C~80 DEG C, each rectifying column is for substance corresponding to rectification and purification set temperature section.
The drainer quantity is corresponding with rectifying column quantity, the company when rectifying column is multiple, between multiple rectifying columns
Mode is connect as parallel connection, is accessed only for condensing the liquid outlet of the drainer of ethyl alcohol and/or chloroform by water pump in multiple drainers
The inlet for changing runner, in drainer for condense formaldehyde, mercaptan, thioether, dimethyl sulfide, any one in acetaldehyde drainer
Liquid outlet accesses fluid reservoir.
It further include heat exchanger, the multi-stage condensing knockout tower is additionally provided with heat dissipation outlet, and the heat dissipation outlet is connected to heat
The heat dissipation outlet of the heat absorption import of exchanger, the heat exchanger is connected respectively to rectifying column and purifies the heat absorption import of runner.
The purification runner is divided into cold-zone and hot-zone, is respectively used to adsorb gas and be desorbed, the cold-zone into
Mouthful temperature is 20 DEG C~40 DEG C, and adsorbent material is one of active carbon, zeolite, metal framework structure material or a variety of, described
The inlet temperature of hot-zone is 80 DEG C~120 DEG C, and desorption material is organic solution.
The organic gas purity that the rectifying column purifies is 80%~99%.
The condensation temperature of the drainer is 0 DEG C~30 DEG C.
The molecular weight of permeable membrane used is 1w~12w in the dialysis pond, and the dialysis time is 12h~60h, is obtained after dialysis
Concentration >=5mol/L of concentrate solution.
The air inlet temperature of the electrostatic precipitator is 20 DEG C~40 DEG C.
The present invention is equipped with multi-stage condensing knockout tower, different using the boiling point of different organic substances, in exhaust gas it is different at
Part is condensed and separated, and the gas with various after separation is subject to rectification and purification in rectifying column, obtains high-purity organic gas, organic
Gas condenses in drainer is made organic solution.The inorganic matter waste liquid that condensing tower high temperature condenses is obtained with rectifying column rectifying
Waste liquid sulfur-bearing concentrating spent liquor is obtained by dialysis pond.The gas containing particulate matter and other impurity that condensation tower cooler obtains,
It is then sent to the particulate matter removed in gas in electrostatic precipitator, purification runner is carried out later and the organic matter in gas is carried out
Absorption and elution, elution material therefor be the upper obtained high-purity organic solution of a process, reach in exhaust gas it is effective at
The effect of part recycling.Meanwhile the heat needed in rectifying column and purification runner is from multi-stage condensing knockout tower, it is multistage cold
The heat condensed in solidifying knockout tower, is used for rectifying and elevated temperature desorption, achievees the effect that heat energy recycling, energy saving
Supply, it is environmentally protective.
Detailed description of the invention
Fig. 1 is papermaking waste gas purification reclaimer component connection figure of the invention；
Fig. 2 is the component connection figure of the embodiment of the present invention one；
Fig. 3 is the component connection figure of the embodiment of the present invention two, three.
Specific embodiment
It is described further below with reference to technical effect of the attached drawing to design of the invention, specific structure and generation, with
It is fully understood from the purpose of the present invention, feature and effect.
With reference to Fig. 1, a kind of papermaking waste gas purification reclaimer of the invention, including the multi-stage condensing being connected with pipeline 10
Knockout tower 1, rectifying column 2, drainer 3, water pump 4, purification runner 5, dialysis pond 6, air-introduced machine 7, electrostatic precipitator 8 and heat exchange
Device 9,1 cavity of multi-stage condensing knockout tower is interior to be equipped with multilayer insulating panel 101, and the close inside cavities end of every layer of partition 101 is equipped with
Liquid mouth, liquid outlet are connected by water pump 4 with 2 inlet of rectifying column, and 2 gas outlet of rectifying column connects with 3 air inlet of drainer.
The partition 101 of multi-stage condensing knockout tower 1 is five layers, the not jljl for most five temperature ranges of refrigerated separation
Matter, the corresponding isolated substance of each temperature range be respectively as follows: 80 DEG C~100 DEG C for separate water, 70 DEG C~80 DEG C be used to separate
Ethyl alcohol, 60 DEG C~70 DEG C for separate chloroform and formaldehyde, 30 DEG C~40 DEG C for separate mercaptan, thioether and dimethyl sulfide, 20 DEG C~
30 DEG C for separating acetaldehyde.Multi-stage condensing knockout tower 1 is different using the boiling point of gas with various in mixed gas, realizes to different gas
The condensation separation of body substance.The boiling point of corresponding organic substance is as follows: acetaldehyde boiling point is 20.8 DEG C, and mercaptan boiling point is 36.2 DEG C, sulphur
Ether boiling point is 38 DEG C, chloroform boiling point is 61 DEG C, methanol boiling point is 64.7 DEG C, ethyl alcohol boiling point is 78 DEG C.In 80 DEG C or less condensations point
The end liquid outlet of partition 101 is flowed under the drainage of partition 101 from the liquid that obtained main component is organic matter, via
The extraction of water pump 4 flows to rectifying column 2.
The quantity of rectifying column 2 is 1~4, for rectification and purification ethyl alcohol, chloroform and formaldehyde, mercaptan, thioether and dimethyl sulfide,
One of acetaldehyde is a variety of, and the quantity of rectifying column 2 can be set as needed, i.e., the organic gas according to contained in exhaust gas at
The setting of number amount.When rectifying column 2 is multiple, the connection type between multiple rectifying columns 2 is parallel connection, and each rectifying column 2 is arranged
Rectification temperature be corresponding gas condensing temperature section, be used for the corresponding organic substance of rectification and purification.3 quantity of drainer and essence
Evaporate that 2 quantity of tower is corresponding, it is 80%~99% that rectifying column 2, which purifies obtained organic gas purity,.Gas after purification enters
It is condensed in drainer 3, obtains high-purity organic solution, the condensation temperature of drainer 3 is 0 DEG C~30 DEG C.
Multi-stage condensing knockout tower 1 and rectifying column 2 are equipped with waste liquid port, and waste liquid port accesses 6 inlet of dialysis pond, dialysis pond 6
Liquid outlet accesses waste liquid pool 11.The main component that multi-stage condensing knockout tower 1 is condensed at 80 DEG C or more be inorganic matter waste liquid,
Enter dialysis pond 6 with the waste liquid that 2 rectifying of rectifying column obtains and separate concentration, obtains sulfur-bearing concentrating spent liquor, be stored in waste liquid pool 11.
The molecular weight of permeable membrane used is 1w~12w in dialysis pond 6, and the dialysis time is 12h~60h, obtains concentrate solution after dialysis
Concentration >=5mol/L.
It is equipped with gas outlet at the top of multi-stage condensing knockout tower 1, is particulate matter or other for discharging condensed main component
The gas of impurity.Gas outlet is connected by air-introduced machine 7 with the air inlet of electrostatic precipitator 8, for removing the particle in gas
Object and dust.The air inlet temperature of electrostatic precipitator 8 is 20 DEG C~40 DEG C, and the gas outlet of electrostatic precipitator 8 is connected to only
Change the air inlet of runner 5, purification runner 5 carries out absorption concentration to the organic component in gas, clean air is discharged, by net
The exhaust outlet for changing runner 5 leads to nature, and the organic solution after concentration then passes through leakage fluid dram and is discharged into fluid reservoir 12, as chemical industry
Raw material recycling.
Purification runner 5 divides for cold-zone and hot-zone, is respectively used to adsorb gas and be desorbed.The inlet temperature of cold-zone is
20 DEG C~40 DEG C, adsorbent material is one of active carbon, zeolite, metal framework structure material or a variety of, the import temperature of hot-zone
Degree is 80 DEG C~120 DEG C, and desorption material is the organic solution condensed in drainer 3, to realize the weight to organic solution
It is multiple to utilize.Since ethyl alcohol in organic matter and chloroform are preferable solvent, other organic matters such as formaldehyde, acetaldehyde, mercaptan, thioether, two
First sulphur etc. is toxic or has peculiar smell, is not suitable for being desorbed.Therefore, for condensing the cold of ethyl alcohol and/or chloroform in multiple drainers 3
The liquid outlet of solidifying tank 3 by the inlet of the access purification runner 5 of water pump 4, in drainer 3 for condense formaldehyde, mercaptan, thioether,
The liquid outlet of the drainer 3 of any one in dimethyl sulfide, acetaldehyde is then directly accessed fluid reservoir 12, repeats benefit as industrial chemicals
With.
In order to reuse to the heat generated in 1 condensation process of multi-stage condensing knockout tower, multi-stage condensing knockout tower 1 is also set
There is heat dissipation to export, heat dissipation outlet is connected to the heat absorption import of heat exchanger 9, and the heat dissipation outlet of heat exchanger 9 is connected respectively to essence
It evaporates tower 2 and purifies the heat absorption import of runner 5, be respectively used to heat required for rectification and purification and elevated temperature desorption.Multi-stage condensing point
Pass through heat exchanger 9, supply rectifying column 2 and purification runner 5 from the heat that tower 1 generates, reaches the recycling to heat source, reduce
The wasting of resources reduces energy loss and purified treatment cost.
When papermaking waste gas purification reclaimer of the invention is started to work, papermaking exhaust gas is entered more by condensation fan housing 102
Inside grade condensation separation tower 1.Mixed gas generates multistage refrigerated separation, the liquid of formation under the condensed water effect of different temperatures
It guides via different partitions 101, is flowed out from the liquid outlet of 101 end of partition.The boiling of machine object as contained in papermaking exhaust gas
Point respectively enters multiple at 80 DEG C hereinafter, in the organic matter liquid that 80 DEG C or less condensations obtain under the extraction effect of water pump 4
Carry out rectification and purification in rectifying column 2, become high-purity organic gas again, organic gas enters therewith in drainer 3, again at
For high-purity organic solution.Thermal energy needed for rectifying column 2 is provided by multi-stage condensing knockout tower 1.
The main component that multi-stage condensing knockout tower 1 is condensed at 80 DEG C or more is the waste liquid of inorganic matter, then by waste liquid port
Outflow carries out dialysis concentration into dialysis pond 6, the sulfur-bearing being concentrated is useless with the waste liquid isolated after 2 rectifying of rectifying column
Liquid is stored in waste liquid pool 11.
The main component after cooling of multi-stage condensing knockout tower 1 is the gas of particulate matter and other impurity, passes through going out for top
Port discharge removes particulate matter into electrostatic precipitator 8 under the action of air-introduced machine 7, enters purification runner 5 later, to gas
Organic matter in body is adsorbed and is desorbed, and the heat that needs are desorbed is provided by multi-stage condensing knockout tower 1, is had used by desorption
Machine solution is high-purity organic solution that above-mentioned steps obtain ethyl alcohol or chloroform.Pass through exhaust outlet by purified clean gas
Xiang great Qi is arranged, fluid reservoir 12 is discharged by leakage fluid dram by the organic solution of desorption, can be reused.By above-mentioned steps
High-purity organic solution of obtained formaldehyde, acetaldehyde, mercaptan, thioether, dimethyl sulfide, then be directly discharged to fluid reservoir 12, as chemical industry
Raw material recycling.
Embodiment one:
With reference to Fig. 2, organic gas composition contained in exhaust gas is mainly ethyl alcohol and chloroform, the number of rectifying column 2 and drainer 3
Amount is 2.The liquid outlet of two layers of partition, 101 end of multi-stage condensing knockout tower 1 connects rectifying column 2 and condensation by water pump 4
Tank 3, the inlet that the liquid outlet of two drainers 3 passes through the access purification runner 5 of water pump 4.
Exhaust gas by condensation fan housing 102 enter multi-stage condensing knockout tower 1, multi-stage condensing knockout tower 1 80 DEG C~100 DEG C,
70 DEG C~80 DEG C and 60 DEG C~70 DEG C respectively are isolated by water, ethyl alcohol and chloroform liquid, water pump 4 extraction effect under, ethyl alcohol and
Chloroform respectively enters and carries out rectification and purification in rectifying column 2, and the set temperature of rectifying column 2 is respectively 70 DEG C~80 DEG C and 60 DEG C~70
DEG C, rectifying obtains the ethyl alcohol and chloroform gas of 95% purity.Later into condensation liquefaction in 30 DEG C of drainer 3, retrieve
High-purity ethyl alcohol and chloroformic solution.
The main component that multi-stage condensing knockout tower 1 is condensed at 80 DEG C or more is the waste liquid of inorganic matter, then by waste liquid port
Outflow carries out dialysis concentration into dialysis pond 6, the molecular weight of permeable membrane is with the waste liquid isolated after 2 rectifying of rectifying column
3w, dialysis time are that for 24 hours, the concentration of concentrate solution is 10mol/L, are stored in waste liquid pool 11.
The main component after cooling of multi-stage condensing knockout tower 1 is the gas of particulate matter and other impurity, passes through going out for top
Port discharge removes particulate matter, the air inlet of electrostatic precipitator 8 into electrostatic precipitator 8 under the action of air-introduced machine 7
Temperature is 30 DEG C.Enter purification runner 5 later, cold-zone absorption is carried out to the organic matter in gas and hot-zone is desorbed.Cold-zone into
Mouth temperature is 20 DEG C, and adsorbent material is active carbon, and the benezene material in gas is concentrated.After the adsorption saturation of cold-zone, turn to
Hot-zone is eluted.The inlet temperature of hot-zone is 120 DEG C, and the ethyl alcohol and chloroformic solution that the above-mentioned steps of use obtain are washed
It is de-.Clean gas after absorption and desorption arranges Xiang great Qi by exhaust outlet, is arranged by the organic solution of desorption by leakage fluid dram
It is put into fluid reservoir 12, is reused as industrial chemicals.
Embodiment two:
Main ingredient with reference to Fig. 3, for the paper mill using sulfate, sulphite pulping process, in exhaust gas
For sulfide, contained organic gas composition includes ethyl alcohol, chloroform and formaldehyde, mercaptan, thioether and dimethyl sulfide, acetaldehyde etc., rectifying
The quantity of tower 2 and drainer 3 is 4.The liquid outlet of four layers of 101 end of partition of multi-stage condensing knockout tower 1 is connected by water pump 4
Connect rectifying column 2 and drainer 3.The liquid outlet of two drainers 3 purifies the inlet of runner 5 by the access of water pump 4, and another two is cold
The liquid outlet of solidifying tank 3 accesses fluid reservoir 12.
Exhaust gas enters multi-stage condensing knockout tower 1 by condensation fan housing 102, and multi-stage condensing knockout tower 1 is at 80 DEG C~100 DEG C points
From water, 70 DEG C~80 DEG C separating alcohols, 60 DEG C~70 DEG C separation chloroforms and formaldehyde, 30 DEG C~40 DEG C separation mercaptan, thioethers and two
First sulphur, 20 DEG C~30 DEG C separation acetaldehyde.Under the extraction effect of water pump 4, organic substance in addition to water respectively enters rectifying
Carry out rectification and purification in tower 2, the set temperature of 4 rectifying columns 2 is respectively 70 DEG C~80 DEG C, 60 DEG C~70 DEG C, 30 DEG C~40 DEG C,
20 DEG C~30 DEG C, rectifying obtains ethyl alcohol, chloroform and formaldehyde, mercaptan, thioether and the dimethyl sulfide, aldehydes gas of 85% purity.Later
Into condensation liquefaction in 0 DEG C of drainer 3, high-purity above-mentioned organic solution is retrieved.
The main component that multi-stage condensing knockout tower 1 is condensed at 80 DEG C or more is the waste liquid of inorganic matter, then by waste liquid port
Outflow carries out dialysis concentration into dialysis pond 6, the molecular weight of permeable membrane is with the waste liquid isolated after 2 rectifying of rectifying column
12w, dialysis time are 60h, and the concentration of concentrate solution is 60mol/L, is stored in waste liquid pool 11.
The main component after cooling of multi-stage condensing knockout tower 1 is the gas of particulate matter and other impurity, passes through going out for top
Port discharge removes particulate matter, the air inlet of electrostatic precipitator 8 into electrostatic precipitator 8 under the action of air-introduced machine 7
Temperature is 40 DEG C.Enter purification runner 5 later, cold-zone absorption is carried out to the organic matter in gas and hot-zone is desorbed.Cold-zone into
Mouth temperature is 30 DEG C, and adsorbent material is zeolitic material, and the benzene class in gas, ketone, aldehyde material are concentrated.Cold-zone absorption
After saturation, turns to hot-zone and eluted.The inlet temperature of hot-zone is 80 DEG C, and the ethyl alcohol and chloroform that the above-mentioned steps of use obtain are molten
Liquid is eluted.Clean gas after absorption and desorption arranges Xiang great Qi by exhaust outlet, passes through by the organic solution of desorption
Leakage fluid dram is discharged into fluid reservoir 12, reuses as industrial chemicals.Formaldehyde, acetaldehyde, mercaptan, the sulphur obtained by above-mentioned steps
High-purity organic solution of ether, dimethyl sulfide, then be directly discharged to fluid reservoir 12, reuses as industrial chemicals.
Embodiment three:
With reference to Fig. 3, for the paper mill using coal-burning boiler, alkali recovery furnace, the main ingredient in exhaust gas is thick
Grain object and fine particle, contained organic gas composition include ethyl alcohol, chloroform and formaldehyde, mercaptan, thioether and dimethyl sulfide, acetaldehyde
Deng the quantity of rectifying column 2 and drainer 3 is 4.The liquid outlet of four layers of 101 end of partition of multi-stage condensing knockout tower 1 passes through
Water pump 4 connects rectifying column 2 and drainer 3.The liquid outlet of two drainers 3 purifies the inlet of runner 5 by the access of water pump 4,
The liquid outlet of another two drainer 3 accesses fluid reservoir 12.
Exhaust gas enters multi-stage condensing knockout tower 1 by condensation fan housing 102, and multi-stage condensing knockout tower 1 is at 80 DEG C~100 DEG C points
From water, 70 DEG C~80 DEG C separating alcohols, 60 DEG C~70 DEG C separation chloroforms and formaldehyde, 30 DEG C~40 DEG C separation mercaptan, thioethers and two
First sulphur, 20 DEG C~30 DEG C separation acetaldehyde.Under the extraction effect of water pump 4, organic substance in addition to water respectively enters rectifying
Carry out rectification and purification in tower 2, the set temperature of 4 rectifying columns 2 is respectively 70 DEG C~80 DEG C, 60 DEG C~70 DEG C, 30 DEG C~40 DEG C,
20 DEG C~30 DEG C, rectifying obtains ethyl alcohol, chloroform and formaldehyde, mercaptan, thioether and the dimethyl sulfide, aldehydes gas of 90% purity.Later
Into condensation liquefaction in 10 DEG C of drainer 3, high-purity above-mentioned organic solution is retrieved.
The main component that multi-stage condensing knockout tower 1 is condensed at 80 DEG C or more is the waste liquid of inorganic matter, then by waste liquid port
Outflow carries out dialysis concentration into dialysis pond 6, the molecular weight of permeable membrane is with the waste liquid isolated after 2 rectifying of rectifying column
1w, dialysis time are 12h, and the concentration of concentrate solution is 5mol/L, is stored in waste liquid pool 11.
The main component after cooling of multi-stage condensing knockout tower 1 is the gas of particulate matter and other impurity, passes through going out for top
Port discharge removes particulate matter, the air inlet of electrostatic precipitator 8 into electrostatic precipitator 8 under the action of air-introduced machine 7
Temperature is 20 DEG C.Enter purification runner 5 later, cold-zone absorption is carried out to the organic matter in gas and hot-zone is desorbed.Cold-zone into
Mouth temperature is 40 DEG C, and adsorbent material is active carbon, and the benezene material in gas is concentrated.After the adsorption saturation of cold-zone, turn to
Hot-zone is eluted.The inlet temperature of hot-zone is 100 DEG C, and the ethyl alcohol and chloroformic solution that the above-mentioned steps of use obtain are washed
It is de-.Clean gas after absorption and desorption arranges Xiang great Qi by exhaust outlet, is arranged by the organic solution of desorption by leakage fluid dram
It is put into fluid reservoir 12, is reused as industrial chemicals.Formaldehyde, acetaldehyde, mercaptan, thioether, the diformazan obtained by above-mentioned steps
High-purity organic solution of sulphur, then be directly discharged to fluid reservoir 12, reuses as industrial chemicals.
Papermaking waste gas purification reclaimer of the invention, it is different using the boiling point of different organic substances, in exhaust gas not
It is condensed and separated with composition, obtains high-purity organic solution, organic solution is used to purify the organic component in absorption exhaust gas, reaches
To the purpose of purification exhaust gas, toxic and peculiar smell organic solution is then used for industrial chemicals recycling.Meanwhile condensation process obtains
Heat, be used for rectifying and elevated temperature desorption, achieve the effect that heat energy recycling, energy saving supply is environmentally protective.
Disclosed above is only the embodiment of the present invention, and still, the present invention is not limited to this, the technology of any this field
What personnel can think variation should all fall into protection scope of the present invention.
Claims (10)
1. a kind of papermaking waste gas purification reclaimer, which is characterized in that including the multi-stage condensing separation being connected with pipeline (10)
Tower (1), rectifying column (2), drainer (3), water pump (4), purification runner (5), dialysis pond (6), air-introduced machine (7) and electrostatic precipitation dress
It sets (8), is equipped with multilayer insulating panel (101) in multi-stage condensing knockout tower (1) cavity, in the close cavity of every layer of partition (101)
Side end is equipped with liquid outlet, and liquid outlet connects by water pump (4) with rectifying column (2) inlet, rectifying column (2) gas outlet and
Drainer (3) air inlet connects；The multi-stage condensing knockout tower (1) and rectifying column (2) are equipped with waste liquid port, and the waste liquid port is equal
Dialysis pond (6) inlet is accessed, dialysis pond (6) liquid outlet accesses waste liquid pool (11)；Multi-stage condensing knockout tower (1) top
Portion is equipped with gas outlet, and the gas outlet is connected by air-introduced machine (7) with the air inlet of electrostatic precipitator (8), and the electrostatic removes
The gas outlet of dirt device (8) is connected to the air inlet of purification runner (5), and the exhaust outlet of purification runner (5) leads to nature,
Leakage fluid dram connects fluid reservoir (12).
2. papermaking waste gas purification reclaimer according to claim 1, which is characterized in that the multi-stage condensing knockout tower
(1) partition (101) is five layers, and for the different material of most five temperature ranges of refrigerated separation, each temperature range is corresponding
Isolated substance be respectively as follows: 80 DEG C~100 DEG C for separate water, 70 DEG C~80 DEG C for separating alcohol, 60 DEG C~70 DEG C be used for
Separation chloroform and formaldehyde, 30 DEG C~40 DEG C for separating, mercaptan, thioether and dimethyl sulfide, 20 DEG C~30 DEG C for separating acetaldehyde.
3. papermaking waste gas purification reclaimer according to claim 1, which is characterized in that the quantity of the rectifying column (2)
It is 1~4, for one of rectification and purification ethyl alcohol, chloroform and formaldehyde, mercaptan, thioether and dimethyl sulfide, acetaldehyde or a variety of, essence
It is 20 DEG C~30 DEG C that the temperature range for evaporating every kind of substance, which is respectively as follows: the temperature of acetaldehyde, and the temperature of mercaptan, thioether and dimethyl sulfide is 30
DEG C~40 DEG C, the temperature of chloroform and formaldehyde is 60 DEG C~70 DEG C, and the temperature of ethyl alcohol is 70 DEG C~80 DEG C, and each rectifying column (2) is used
The substance corresponding to rectification and purification set temperature section.
4. papermaking waste gas purification reclaimer according to claim 3, which is characterized in that drainer (3) quantity with
Rectifying column (2) quantity is corresponding, and when rectifying column (2) are multiple, the connection type between multiple rectifying columns (2) is parallel connection, more
Pass through water pump (4) access purification runner for condensing the liquid outlet of the drainer (3) of ethyl alcohol and/or chloroform in a drainer (3)
(5) inlet, in drainer (3) for condense formaldehyde, mercaptan, thioether, dimethyl sulfide, any one in acetaldehyde drainer
(3) liquid outlet accesses fluid reservoir (12).
5. according to claim 1 or papermaking waste gas purification reclaimer described in any one of 4, which is characterized in that further include heat
Exchanger (9), the multi-stage condensing knockout tower (1) are additionally provided with heat dissipation outlet, and the heat dissipation outlet is connected to heat exchanger (9)
The heat dissipation outlet of heat absorption import, the heat exchanger (9) is connected respectively to rectifying column (2) and purifies the heat absorption import of runner (5).
6. according to claim 1 or papermaking waste gas purification reclaimer described in any one of 4, which is characterized in that the purification
Runner (5) is divided into cold-zone and hot-zone, is respectively used to adsorb gas and be desorbed, and the inlet temperature of the cold-zone is 20 DEG C~
40 DEG C, adsorbent material is one of active carbon, zeolite, metal framework structure material or a variety of, the inlet temperature of the hot-zone
It is 80 DEG C~120 DEG C, desorption material is organic solution.
7. according to claim 1 or papermaking waste gas purification reclaimer described in any one of 4, which is characterized in that the rectifying
The organic gas purity that tower (2) purification obtains is 80%~99%.
8. according to claim 1 or papermaking waste gas purification reclaimer described in any one of 4, which is characterized in that the condensation
The condensation temperature of tank (3) is 0 DEG C~30 DEG C.
9. according to claim 1 or papermaking waste gas purification reclaimer described in any one of 4, which is characterized in that the dialysis
The molecular weight of permeable membrane used is 1w~12w in pond (6), and the dialysis time is 12h~60h, and the dense of concentrate solution is obtained after dialysis
Degree >=5mol/L.
10. according to claim 1 or papermaking waste gas purification reclaimer described in any one of 4, which is characterized in that the electrostatic
The air inlet temperature of dust-extraction unit (8) is 20 DEG C~40 DEG C.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3884768A (en) * | 1972-03-02 | 1975-05-20 | Joseph W Griffith | Reclamation of non-combustible liquids by direct flame vaporization, centrifugal solids separation and subsequent condensation |
| CN1146503A (en) * | 1995-09-29 | 1997-04-02 | 中国科学院山西煤炭化学研究所 | Tail gas recovery method and device in production of silicon carbide fibre |
| CN102838121A (en) * | 2012-09-18 | 2012-12-26 | 特变电工新疆硅业有限公司 | Method and device for recycling tail gas in production of polycrystalline silicon |
| CN108043063A (en) * | 2017-12-20 | 2018-05-18 | 华中科技大学 | A kind of fractional condensing unit for biomass pyrolysis liquefaction Poly-generation |
-
2019
- 2019-04-17 CN CN201910310205.2A patent/CN109939532B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3884768A (en) * | 1972-03-02 | 1975-05-20 | Joseph W Griffith | Reclamation of non-combustible liquids by direct flame vaporization, centrifugal solids separation and subsequent condensation |
| CN1146503A (en) * | 1995-09-29 | 1997-04-02 | 中国科学院山西煤炭化学研究所 | Tail gas recovery method and device in production of silicon carbide fibre |
| CN102838121A (en) * | 2012-09-18 | 2012-12-26 | 特变电工新疆硅业有限公司 | Method and device for recycling tail gas in production of polycrystalline silicon |
| CN108043063A (en) * | 2017-12-20 | 2018-05-18 | 华中科技大学 | A kind of fractional condensing unit for biomass pyrolysis liquefaction Poly-generation |
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| CN109939532B (en) | 2021-07-27 |
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