CN108479317A - One kind recycling processing method of tail gas containing HCN and device - Google Patents
One kind recycling processing method of tail gas containing HCN and device Download PDFInfo
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- CN108479317A CN108479317A CN201810542198.4A CN201810542198A CN108479317A CN 108479317 A CN108479317 A CN 108479317A CN 201810542198 A CN201810542198 A CN 201810542198A CN 108479317 A CN108479317 A CN 108479317A
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- 238000004064 recycling Methods 0.000 title claims abstract description 53
- 238000003672 processing method Methods 0.000 title claims abstract description 22
- LELOWRISYMNNSU-UHFFFAOYSA-N hydrogen cyanide Chemical compound N#C LELOWRISYMNNSU-UHFFFAOYSA-N 0.000 claims abstract description 135
- 239000007789 gas Substances 0.000 claims abstract description 129
- 238000006386 neutralization reaction Methods 0.000 claims abstract description 82
- 238000010521 absorption reaction Methods 0.000 claims abstract description 77
- 238000003795 desorption Methods 0.000 claims abstract description 70
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 60
- 239000000243 solution Substances 0.000 claims abstract description 38
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims abstract description 31
- KXZJHVJKXJLBKO-UHFFFAOYSA-N chembl1408157 Chemical compound N=1C2=CC=CC=C2C(C(=O)O)=CC=1C1=CC=C(O)C=C1 KXZJHVJKXJLBKO-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000000034 method Methods 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 18
- 239000007864 aqueous solution Substances 0.000 claims abstract description 14
- 235000011121 sodium hydroxide Nutrition 0.000 claims abstract description 13
- 239000013067 intermediate product Substances 0.000 claims abstract description 11
- 238000006243 chemical reaction Methods 0.000 claims abstract description 9
- 239000000047 product Substances 0.000 claims abstract description 9
- 238000003860 storage Methods 0.000 claims abstract description 5
- 238000012545 processing Methods 0.000 claims description 26
- 230000002745 absorbent Effects 0.000 claims description 22
- 239000002250 absorbent Substances 0.000 claims description 22
- 239000003381 stabilizer Substances 0.000 claims description 17
- 239000000872 buffer Substances 0.000 claims description 16
- 230000008569 process Effects 0.000 claims description 15
- 238000012958 reprocessing Methods 0.000 claims description 15
- 239000006096 absorbing agent Substances 0.000 claims description 8
- 230000003472 neutralizing effect Effects 0.000 claims description 5
- 239000012535 impurity Substances 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 2
- 230000005494 condensation Effects 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 abstract description 5
- 239000002351 wastewater Substances 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 4
- 238000004821 distillation Methods 0.000 abstract description 3
- 239000006227 byproduct Substances 0.000 description 6
- 238000004519 manufacturing process Methods 0.000 description 6
- MNWBNISUBARLIT-UHFFFAOYSA-N sodium cyanide Chemical compound [Na+].N#[C-] MNWBNISUBARLIT-UHFFFAOYSA-N 0.000 description 5
- 239000002699 waste material Substances 0.000 description 4
- UHOVQNZJYSORNB-UHFFFAOYSA-N Benzene Chemical compound C1=CC=CC=C1 UHOVQNZJYSORNB-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000010992 reflux Methods 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- HEDRZPFGACZZDS-UHFFFAOYSA-N Chloroform Chemical compound ClC(Cl)Cl HEDRZPFGACZZDS-UHFFFAOYSA-N 0.000 description 2
- RTZKZFJDLAIYFH-UHFFFAOYSA-N Diethyl ether Chemical compound CCOCC RTZKZFJDLAIYFH-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- PEDCQBHIVMGVHV-UHFFFAOYSA-N Glycerine Chemical compound OCC(O)CO PEDCQBHIVMGVHV-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 229910052708 sodium Inorganic materials 0.000 description 2
- 239000011734 sodium Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- LTMRRSWNXVJMBA-UHFFFAOYSA-L 2,2-diethylpropanedioate Chemical compound CCC(CC)(C([O-])=O)C([O-])=O LTMRRSWNXVJMBA-UHFFFAOYSA-L 0.000 description 1
- 244000144725 Amygdalus communis Species 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 235000003893 Prunus dulcis var amara Nutrition 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005282 brightening Methods 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 229910052793 cadmium Inorganic materials 0.000 description 1
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 1
- 238000005255 carburizing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- MGNCLNQXLYJVJD-UHFFFAOYSA-N cyanuric chloride Chemical compound ClC1=NC(Cl)=NC(Cl)=N1 MGNCLNQXLYJVJD-UHFFFAOYSA-N 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 239000000975 dye Substances 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000009472 formulation Methods 0.000 description 1
- 239000008246 gaseous mixture Substances 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 235000011187 glycerol Nutrition 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- ANGDWNBGPBMQHW-UHFFFAOYSA-N methyl cyanoacetate Chemical compound COC(=O)CC#N ANGDWNBGPBMQHW-UHFFFAOYSA-N 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005121 nitriding Methods 0.000 description 1
- 150000002825 nitriles Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 239000000985 reactive dye Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 231100000004 severe toxicity Toxicity 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
- 239000012209 synthetic fiber Substances 0.000 description 1
- 229920002994 synthetic fiber Polymers 0.000 description 1
- 239000004753 textile Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—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
-
- 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
- B01D53/1418—Recovery of products
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01C—AMMONIA; CYANOGEN; COMPOUNDS THEREOF
- C01C3/00—Cyanogen; Compounds thereof
- C01C3/08—Simple or complex cyanides of metals
- C01C3/10—Simple alkali metal cyanides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/408—Cyanides, e.g. hydrogen cyanide (HCH)
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Gas Separation By Absorption (AREA)
- Treating Waste Gases (AREA)
Abstract
The present invention discloses one kind recycling processing method of tail gas containing HCN and device, will contain HCN tail gas and be transported to absorptive unit, absorptive unit absorbs the HCN in tail gas, and HCN absorbing liquids are obtained in absorptive unit；The HCN absorbing liquids that absorptive unit obtains are transported to desorption unit to desorb, desorption unit obtains the hydrogen cyanide of intermediate products；The hydrogen cyanide that desorption unit obtains is transported to neutralization reaction unit, reaction generates sodium cyanide solution after multistage reverse contact by sodium hydrate aqueous solution；The sodium cyanide solution of generation is delivered to neutralization and stablizes unit, the sodium cyanide solution that desalted water is configured to target composition is added, sodium cyanide solution is delivered to sodium cyanide storage tank.The present invention is realized that recycling of water resource utilizes, does not generate technique waste water, generate the sodium cyanide solution product of high added value, substitute traditional incineration technology scheme, reduce the pollution to environment, improved Business Economic Benefit using absorption, distillation desorption principle.
Description
Technical field
The present invention relates to a kind of recycling processing method of tail gas containing HCN and device, belong to the tail gas disposal technique neck containing HCN
Domain.
Background technology
Hydrogen cyanide, colourless transparent liquid, severe toxicity is volatile, can be mixed with ethyl alcohol, ether, glycerine, ammonia, benzene, chloroform and water etc.
It is molten, it is liquid, easily even dispersion in air under standard state, incendivity, the aerial content of hydrogen cyanide reach in air
When to 5.6%~12.8%, there is explosivity.In Chemical Manufacture, there are many processes to have the generation of HCN by-product gas, including
It is interval and continuous.It is directed to the processing mode burned containing HCN tail gas generally uses at this stage, is not only easy pollution environment,
And cause the waste of resource.
Cymag is cubic system, white crystals particle or powder, easily deliquesces, there is faint bitter almond odor, Cymag
It is a kind of important basic chemical raw materials, the quenching medium of various steel is used as in mechanical industry.In electroplating industry as copper facing,
The key component of silver, cadmium and zinc etc..In electroplating solution anode polarization effect can reduce, ensure that anode normally dissolves, stablize
Plating solution simultaneously can improve cathodic polarization effect, obtain uniform coating.For extracting the precious metals such as gold, silver in metallurgical industry.Change
The raw material for being the various inorganic cyanides of manufacture and hydrogen cyanide occurring is learned in industry, manufacture organic glass, various synthesis materials are also used for
The copolymer of material, nitrile rubber, synthetic fibers.For manufacturing cyanuric trichloride (reactive dye intermediate, and making a living in dye industry
Produce the raw material of brightening agent).For manufacturing methyl cyanoacetate and diethyl malonate etc. in medical industry.It is used as matchmaker in textile industry
Stain is additionally operable to the liquid formula carburizing of steel, nitriding.
Recycling and recycling refer to the recycling and recycling of waste,《People's Republic of China's circular economy promotion law》
In just provide, " during refuse reclamation and recycling, should ensure production safety, ensure that product quality meets state's domestic discipline and family rules
Fixed standard, and prevent to pollute again." " enterprise and institution should establish and improve management system, take measures, and reduce
Resource consumption reduces the yield and discharge capacity of waste, and recycling and the recycling for improving waste are horizontal.There is an urgent need for a kind of new at present
Technical solution to contain HCN tail gas carry out recycling treatment.
Invention content
The present invention adopts in view of the deficienciess of the prior art, a kind of recycling processing method of tail gas containing HCN of offer and device
With the principle of absorption, absorb the HCN in by-product HCN tail gas to obtain HCN water-soluble；Then the principle for using distillation desorption, obtains
Intermediate products HCN；Using the principle of neutralization reaction, HCN is reacted with certain density sodium hydrate aqueous solution generates Cymag water
Solution.Entire technical solution realizes the water in resource utilization system, the water of needing no outside, while not generating technique waste water.
The technical solution that the present invention solves above-mentioned technical problem is as follows：A kind of recycling processing method of tail gas containing HCN, it is described
Recycling processing method includes the following steps：
(1) tail gas absorption containing HCN will contain HCN tail gas and be transported to absorptive unit, and absorptive unit carries out the HCN in tail gas
It absorbs, HCN absorbing liquids is obtained in absorptive unit；
(2) HCN products desorb, and the HCN absorbing liquids that absorptive unit obtains are transported to desorption unit and are desorbed, and desorption is single
Member obtains the hydrogen cyanide of intermediate products；
(3) hydrogen cyanide that desorption unit obtains is transported to neutralization reaction unit, passes through hydroxide by hydrogen cyanide neutralization reaction
Sodium water solution reaction after multistage reverse contact generates sodium cyanide solution；
(4) product is stablized, and the sodium cyanide solution of generation, which is delivered to neutralization, stablizes unit, and desalted water is added and is configured to mesh
The sodium cyanide solution of composition is marked, sodium cyanide solution is delivered to sodium cyanide storage tank.
As the preferred of the recycling processing method of tail gas containing HCN, the absorptive unit uses absorption tower or absorption kettle, absorbs
Level-one is at least arranged in tower or absorption kettle, and using several grades of serial or parallel connections, the absorbent of absorption tower or absorption kettle uses the solution
Inhale desorption unit poor-water of the unit after removing heat.
As the preferred of the recycling processing method of tail gas containing HCN, the process water of the absorptive unit removing HCN, according to work
The ingredient of skill water, periodically by impurity treatment it is clean after, return to absorption tower or the absorption kettle of absorptive unit, or be delivered to desorption unit
Desorber.
As the preferred of the recycling processing method of tail gas containing HCN, the neutralization reaction unit and neutralization are stablized unit and are generated
Tail gas go tail gas reprocess unit, tail gas reprocessing unit several grades of absorption towers or absorption kettle are set, using sodium hydroxide
Aqueous solution is absorbed, until the tail gas of discharge meets the requirements.
As the preferred of the recycling processing method of tail gas containing HCN, the resolution unit is equipped with Analytic Tower, desorber removing
If the process water of HCN contains light component, send and take off light unit to poor-water and carry out de- light component processing, the process water for removing light component returns
It is back to absorptive unit.
The present invention also provides a kind of processing equipment for recycling of tail gas containing HCN, the processing equipment for recycling includes absorbing list
Member, desorption unit, neutralization reaction unit, neutralization stablize unit, tail gas reprocessing unit and poor-water and take off light unit；The absorption is single
Member connects the desorption unit and poor-water takes off light unit；The desorption unit connects the neutralization reaction unit and poor-water is de- light single
Member；The neutralization reaction unit connects the neutralization and stablizes unit, and neutralization reaction unit and neutralization stablize unit and be separately connected institute
State tail gas reprocessing unit.
As the preferred of the processing equipment for recycling of tail gas containing HCN, the absorptive unit includes the tank of gas buffer containing HCN, inhales
Tower and absorbent cooler are received, the desorption unit includes desorber, desorption overhead condenser, desorption return tank of top of the tower and desorption
Tower reboiler；The tank top of gas buffer containing HCN connects the absorption tower tower reactor；The absorption tower tower top connects the absorption
Agent cooler；The absorbent cooler connects the desorber tower reactor；Pans are equipped between the desorber and absorption tower,
The pans connect the absorbing tower bottom, and pans connect in the middle part of the desorber；The desorption overhead condenser connection
At the top of the desorber；The desorption return tank of top of the tower is connected between the desorption column overhead and desorption overhead condenser；Institute
It states desorption tower reboiler and is connected to the desorber tower reactor.
As the preferred of the processing equipment for recycling of tail gas containing HCN, the neutralization reaction unit includes neutralization reaction tower, described
It neutralizes and stablizes unit including neutralizing stabilizer；Neutralization tower reactor is connected between neutralization reaction tower and the desorber of the desorption unit
Mixer；It is connected between the neutralization tower reactor mixer and neutralization reaction tower bottom of tower and neutralizes tower reactor recirculation cooler, institute
Neutralization tower reactor recirculation cooler is stated to be connected in the middle part of the neutralization stabilizer；The neutralization reaction tower and neutralization stabilizer top part
The tail gas reprocessing unit is not connected.
As the preferred of the processing equipment for recycling of tail gas containing HCN, the tail gas reprocessing unit includes tail gas buffer, tail
Aspiration kettle and tail gas absorber；At the top of the tail gas buffer connection neutralization reaction tower and neutralization stabilizer, tail gas absorber
For direct seat on tail gas absorption kettle, the tail gas absorption kettle connects the tail gas buffer.
As the preferred of the processing equipment for recycling of tail gas containing HCN, it includes lightness-removing column, lightness-removing column top that the poor-water, which takes off light unit,
Condenser, lightness-removing column top return tank and lightness-removing column reboiler；The lightness-removing column connects the absorptive unit and desorption unit, takes off light
Tower tower reactor is connected to the absorbent cooler of absorptive unit；Lightness-removing column top condenser connects at the top of the lightness-removing column, described
Lightness-removing column top return tank is connected between lightness-removing column top condenser and the lightness-removing column；The lightness-removing column reboiler is connected to
The lightness-removing column tower reactor.
The present invention absorbs the HCN in by-product HCN tail gas to obtain HCN water-soluble using the principle absorbed；Then rectifying is used
The principle of desorption obtains intermediate products HCN, and using the principle of neutralization reaction, HCN and certain density sodium hydrate aqueous solution
It reacts and generates sodium cyanide solution, the water in entire technical solution realization resource utilization system, the water of needing no outside, simultaneously
Technique waste water is not generated, realizes the recycling of HCN, the sodium cyanide solution product of high added value is generated, substitutes traditional
Incineration technology scheme reduces the pollution to environment, improves the economic benefit of enterprise.
Description of the drawings
Fig. 1 is the recycling processing method flow diagram of tail gas containing HCN in embodiment；
Fig. 2 is the processing equipment for recycling general frame figure of tail gas containing HCN in embodiment；
Fig. 3 is the processing equipment for recycling structural schematic diagram of tail gas containing HCN in embodiment.
Specific implementation mode
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, below in conjunction with the accompanying drawings to the present invention
Specific implementation mode be described in detail.Many details are elaborated in the following description in order to fully understand this hair
It is bright.But the invention can be embodied in many other ways as described herein, those skilled in the art can be not
Similar improvement is done in the case of violating intension of the present invention, therefore the present invention is not limited by following public specific embodiment.
Unless otherwise defined, all of technologies and scientific terms used here by the article and belong to the technical field of the present invention
The normally understood meaning of technical staff is identical.Used term is intended merely to description tool in the description of the invention herein
The purpose of the embodiment of body, it is not intended that in the limitation present invention.Term as used herein "and/or" includes one or more
Any and all combinations of relevant Listed Items.
As shown in Figure 1, a kind of recycling processing method of tail gas containing HCN, the recycling processing method include the following steps：
(1) tail gas absorption containing HCN will contain HCN tail gas and be transported to absorptive unit, and absorptive unit carries out the HCN in tail gas
It absorbs, HCN absorbing liquids is obtained in absorptive unit；
(2) HCN products desorb, and the HCN absorbing liquids that absorptive unit obtains are transported to desorption unit and are desorbed, and desorption is single
Member obtains the hydrogen cyanide of intermediate products；
(3) hydrogen cyanide that desorption unit obtains is transported to neutralization reaction unit, passes through hydroxide by hydrogen cyanide neutralization reaction
Sodium water solution reaction after multistage reverse contact generates sodium cyanide solution；
(4) product is stablized, and the sodium cyanide solution of generation, which is delivered to neutralization, stablizes unit, and desalted water is added and is configured to mesh
The sodium cyanide solution of composition is marked, sodium cyanide solution is delivered to sodium cyanide storage tank.
In one embodiment of the recycling processing method of tail gas containing HCN, the absorptive unit uses absorption tower or absorption kettle,
Level-one is at least arranged in absorption tower or absorption kettle, and using several grades of serial or parallel connections, the absorbent of absorption tower or absorption kettle uses institute
State desorption unit poor-water of the desorption unit after removing heat.The process water of absorptive unit removing HCN, according to process water at
Point, periodically by impurity treatment it is clean after, return to absorption tower or the absorption kettle of absorptive unit, or be delivered to the desorption of desorption unit
Tower.The neutralization reaction unit and the tail gas for neutralizing stable unit generation go tail gas to reprocess unit, and tail gas reprocessing unit is set
Several grades of absorption towers or absorption kettle are set, is absorbed using sodium hydrate aqueous solution, until the tail gas of discharge meets the requirements.Institute
It states resolution unit and is equipped with Analytic Tower, if the process water of desorber removing HCN contains light component, send and take off light unit to poor-water and taken off
Light component processing, the process water for removing light component are back to absorptive unit.
The technique processing method of the present invention absorbs the HCN in by-product HCN tail gas to obtain HCN water using the principle absorbed
It is molten；Then the principle for using distillation desorption, obtains intermediate products HCN；Using the principle of neutralization reaction, HCN with it is certain density
Sodium hydrate aqueous solution reaction generates sodium cyanide solution.Gaseous mixture containing HCN enters absorption tower, and multistage can be arranged in absorption tower
It absorbs；Absorbent is tower reactor poor-water of the desorber tower reactor after removing heat；Absorption tower tower reactor absorbing liquid goes desorber to desorb, desorption
Column overhead obtains intermediate products hydrogen cyanide.The process water of absorption tower tower reactor removing HCN periodically will be miscellaneous according to the ingredient of process water
After matter processing is clean, absorption tower tower top is returned as absorption water.The intermediate products HCN that desorption column overhead obtains, goes neutralization reaction
Tower, reaction generates sodium cyanide solution after multistage inversely contacts with certain density sodium hydrate aqueous solution；Cymag water
Solution, which is sent to neutralization stabilizer, further to be stablized, and the sodium cyanide solution that quantitative desalted water is configured to target composition is added,
It send to sodium cyanide storage tank.Neutralization reaction tower goes tail gas to reprocess unit with the tail gas for stablizing column overhead is neutralized.Tail gas reprocessing is single
Multistage absorption tower or absorption kettle can be arranged in member, absorbed using certain density sodium hydrate aqueous solution, until discharge
Tail gas meet the requirements until.To realize the water in resource utilization system, the water of needing no outside, while not generating technique
Waste water.
Referring to Fig. 2 and Fig. 3, the present invention also provides a kind of processing equipment for recycling of tail gas containing HCN, the recycling treatment dress
It sets de- including absorptive unit 1, desorption unit 2, neutralization reaction unit 3, the stable unit 4 of neutralization, tail gas reprocessing unit 5 and poor-water
Light unit 6；The absorptive unit 1 connects the desorption unit 2 and poor-water takes off light unit 6；The desorption unit 2 connect it is described in
Light unit 6 is taken off with reaction member 3 and poor-water；The neutralization reaction unit 3 connects the neutralization and stablizes unit 4, neutralization reaction list
Member 3 and neutralization stablize unit 4 and are separately connected the tail gas reprocessing unit 5.
As the preferred of the processing equipment for recycling of tail gas containing HCN, the absorptive unit 1 include the tank of gas buffer containing HCN 7,
Absorption tower 8 and absorbent cooler 9, the desorption unit 2 include desorber 10, desorption overhead condenser 11, desorption tower top time
Flow tank 12 and desorption tower reboiler 13；7 top of the tank of gas buffer containing HCN connects 8 tower reactor of absorption tower；The absorption tower
8 tower tops connect the absorbent cooler 9；The absorbent cooler 9 connects 10 tower reactor of the desorber；The desorber 10
Pans 14 are equipped between absorption tower 8, the pans 14 connect 8 bottom of tower of the absorption tower, and pans 14 connect the solution
Inhale 10 middle part of tower；The desorption overhead condenser 11 connects 10 top of the desorber；The desorption return tank of top of the tower 12 connects
Between 10 tower top of the desorber and desorption overhead condenser 11；The desorption tower reboiler 13 is connected to the desorber 10
Tower reactor.
As the preferred of the processing equipment for recycling of tail gas containing HCN, the neutralization reaction unit 3 includes neutralization reaction tower 15,
It includes neutralizing stabilizer 16 that unit 4 is stablized in the neutralization；Connect between neutralization reaction tower 15 and the desorber 10 of the desorption unit 2
It is connected to and neutralizes tower reactor mixer 17；It is connected with neutralization between the neutralization tower reactor mixer 17 and 15 bottom of tower of neutralization reaction tower
Tower reactor recirculation cooler 18, the neutralization tower reactor recirculation cooler 18 are connected to 16 middle part of the neutralization stabilizer；The neutralization
Reaction tower 15 and 16 top of neutralization stabilizer are separately connected the tail gas reprocessing unit 5.
As the preferred of the processing equipment for recycling of tail gas containing HCN, the tail gas reprocessing unit 5 includes tail gas buffer
19, tail gas absorption kettle 20 and tail gas absorber 21；The tail gas buffer 19 connects neutralization reaction tower 25 and neutralizes stabilizer 16
Top, for 21 direct seat of tail gas absorber on tail gas absorption kettle 20, the tail gas absorption kettle 20 connects the tail gas buffer 19.
As the preferred of the processing equipment for recycling of tail gas containing HCN, the poor-water takes off light unit 6 and includes lightness-removing column 22, takes off gently
Overhead condenser 23, lightness-removing column top return tank 24 and lightness-removing column reboiler 25；The lightness-removing column 22 connects 1 He of the absorptive unit
Desorption unit 2,22 tower reactor of lightness-removing column are connected to the absorbent cooler 9 of absorptive unit 1；Lightness-removing column top condenser 23 connects
22 top of the lightness-removing column, lightness-removing column top return tank 24 are connected to lightness-removing column top condenser 23 and the lightness-removing column 22
Between；The lightness-removing column reboiler 25 is connected to 22 tower reactor of the lightness-removing column.
In the processing procedure of the processing equipment for recycling of tail gas containing HCN, the function of the tank of gas buffer containing HCN 7 is to gas
Buffering, by preliminary gas-liquid separation so that the gas flow for going to absorption tower 8 is relatively stable.Absorption tower 8 is according to internals form
Divide and could be provided as plate column or packed tower；It can be designed as according to diameter monoblock type or split type.Top spray
The HCN by-product gas that rises of absorbent and bottom, inversely come into full contact in absorption tower 8, the tower reactor on absorption tower 8 obtains
The aqueous solution of HCN, the gas safety emptying of tower top；Absorption tower 8 can according to actual demand, be arranged one or more series connection or
Person is in parallel；Absorbent cooler 9 is arranged to be sufficiently cooled the absorbent for entering 8 tower top of absorption tower, reinforces the effect absorbed
Fruit.Pans 14 can also ensure that desorber 10 is fed relatively stable simultaneously with the absorption liquid of 8 tower reactor of snubber tower.
Liquid in pans 14 is delivered to 10 middle part charging of desorber, falls into the material of tower reactor through desorption tower reboiler 13
Add Heat produces part to gasify and is back to tower reactor；The steam risen in tower is collected after the condensation of 10 condenser of desorber in desorber
In 10 return tanks, part reflux, another part intermediate products produce for HCN.The liquid and tower reactor of 10 overhead reflux of desorber
The gas of rising carries out mass transfer and energy transmission in tower, forms stable temperature gradient and concentration gradient.Desorber 10
Absorbent of the poor-water of tower reactor after the cooling of absorbent cooler 9 as 8 tower top of absorption tower.The sampled inspection of process water poor-water
It surveys, if if detection light component content is more, sending to lightness-removing column 22 and carrying out de- light processing.Fall into the poor-water warp of 22 tower reactor of lightness-removing column
Lightness-removing column reboiler 25 is back to tower reactor after gasifying, and gas rises to 22 tower top of lightness-removing column, rises to the light component of tower top through de-
Light overhead condenser 23 is collected after condensing in lightness-removing column top return tank 24, and a part is back to lightness-removing column 22) tower top, another portion
Point light component is produced to outside battery limit (BL).The liquid of reflux and the gas of rising carry out mass transfer and energy transmission in tower, are formed
Stable concentration gradient and temperature gradient.The poor-water of 22 tower reactor of lightness-removing column is back to absorbent cooler 9 and is used as 8 tower top of absorption tower
Absorbent.
The HCN that 10 tower top of desorber obtains is sent to tower reactor mixer 17 is neutralized, and is mixed with 15 tower reactor circulation fluid of neutralization reaction tower
15 tower reactor of neutralization reaction tower is returned after conjunction.Sodium hydrate aqueous solution outside battery limit (BL), the charging of 15 tower top of self-neutralization reaction tower, with
HCN reverse MULTI CONTACTs in tower generate NaCN aqueous solutions, send to stabilizer 16 is neutralized, are configured in and in stabilizer 16
Certain density sodium cyanide solution is sent to outside battery limit (BL).Neutralization reaction tower 15 and the shape for neutralizing the including but not limited to tower of stabilizer 16
Formula, or reaction kettle, it is ensured that HCN and NAOH aqueous solutions come into full contact in consersion unit.Neutralization reaction tower 15 and in
It is sent to tail gas absorption kettle 20 with the tail gas of 16 tower top of stabilizer, certain density sodium hydroxide is contained in advance in tail gas absorption kettle 20
Aqueous solution recycles 21 tower top of tail gas absorber processed and 20 top gas phase space of tail gas absorption kettle, to the HCN in tail gas into advancing one
The absorption of step.Tail gas absorption kettle 20 and tail gas absorber 21 can be arranged more it is in series or in parallel, to ensure that tower top tail gas reaches
It is designated as purpose.The present invention absorbs the HCN in by-product HCN tail gas to obtain HCN water-soluble using the principle absorbed；Then essence is used
The principle for evaporating desorption obtains intermediate products HCN, and using the principle of neutralization reaction, HCN and certain density sodium hydroxide are water-soluble
Liquid, which reacts, generates sodium cyanide solution, the water in entire technical solution realization resource utilization system, the water of needing no outside, together
When do not generate technique waste water, realize the recycling of HCN, substitute traditional incineration technology scheme, reduce the pollution to environment,
Improve the economic benefit of enterprise.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of recycling processing method of tail gas containing HCN, it is characterised in that：The recycling processing method includes the following steps：
(1) tail gas absorption containing HCN will contain HCN tail gas and be transported to absorptive unit, and absorptive unit absorbs the HCN in tail gas,
HCN absorbing liquids are obtained in absorptive unit；
(2) HCN products desorb, and the HCN absorbing liquids that absorptive unit obtains are transported to desorption unit and are desorbed, desorption unit obtains
To the hydrogen cyanide of intermediate products；
(3) hydrogen cyanide that desorption unit obtains is transported to neutralization reaction unit, passes through sodium hydroxide water by hydrogen cyanide neutralization reaction
Solution reaction after multistage reverse contact generates sodium cyanide solution；
(4) product is stablized, and the sodium cyanide solution of generation, which is delivered to neutralization, stablizes unit, and desalted water is added and is configured to target group
At sodium cyanide solution, sodium cyanide solution is delivered to sodium cyanide storage tank.
2. one kind recycling processing method of tail gas containing HCN according to claim 1, it is characterised in that：The absorptive unit
Using absorption tower or absorption kettle, level-one is at least arranged in absorption tower or absorption kettle, using several grades of serial or parallel connections, absorption tower or suction
The absorbent for receiving kettle uses desorption unit poor-water of the desorption unit after removing heat.
3. one kind recycling processing method of tail gas containing HCN according to claim 1, it is characterised in that：The absorptive unit
Remove HCN process water, according to the ingredient of process water, periodically by impurity treatment it is clean after, return absorptive unit absorption tower or
Absorption kettle, or it is delivered to the desorber of desorption unit.
4. one kind recycling processing method of tail gas containing HCN according to claim 1, it is characterised in that：The neutralization reaction
Unit and neutralize stablize unit generate tail gas go tail gas reprocess unit, tail gas reprocessing unit be arranged several grades of absorption towers or
Person's absorption kettle, is absorbed using sodium hydrate aqueous solution, until the tail gas of discharge meets the requirements.
5. one kind recycling processing method of tail gas containing HCN according to claim 1, it is characterised in that：The resolution unit
Equipped with Analytic Tower, if the process water of desorber removing HCN contains light component, send and take off light unit to poor-water and carry out at de- light component
Reason, the process water for removing light component are back to absorptive unit.
6. a kind of processing equipment for recycling of tail gas containing HCN, it is characterised in that：The processing equipment for recycling include absorptive unit,
Desorption unit, neutralization reaction unit, neutralization stablize unit, tail gas reprocessing unit and poor-water and take off light unit；The absorptive unit
It connects the desorption unit and poor-water takes off light unit；The desorption unit connects the neutralization reaction unit and poor-water is de- light single
Member；The neutralization reaction unit connects the neutralization and stablizes unit, and neutralization reaction unit and neutralization stablize unit and be separately connected institute
State tail gas reprocessing unit.
7. one kind processing equipment for recycling of tail gas containing HCN according to claim 6, it is characterised in that：The absorptive unit
Including containing HCN gas buffers tank, absorption tower and absorbent cooler, the desorption unit includes desorber, desorption overhead condensation
Device, desorption return tank of top of the tower and desorption tower reboiler；The tank top of gas buffer containing HCN connects the absorption tower tower reactor；Institute
It states absorption tower tower top and connects the absorbent cooler；The absorbent cooler connects the desorber tower reactor；The desorption
Pans are equipped between tower and absorption tower, the pans connect the absorbing tower bottom, and pans connect in the desorber
Portion；The desorption overhead condenser connects at the top of the desorber；The desorption return tank of top of the tower is connected to the desorber tower
Between top and desorption overhead condenser；The desorption tower reboiler is connected to the desorber tower reactor.
8. one kind processing equipment for recycling of tail gas containing HCN according to claim 6, it is characterised in that：The neutralization reaction
Unit includes neutralization reaction tower, and it includes neutralizing stabilizer that unit is stablized in the neutralization；Neutralization reaction tower and the desorption unit
It is connected between desorber and neutralizes tower reactor mixer；It is connected between the neutralization tower reactor mixer and neutralization reaction tower bottom of tower
Have and neutralize tower reactor recirculation cooler, the neutralization tower reactor recirculation cooler is connected in the middle part of the neutralization stabilizer；The neutralization
The tail gas reprocessing unit is separately connected at the top of reaction tower and neutralization stabilizer.
9. one kind processing equipment for recycling of tail gas containing HCN according to claim 6, it is characterised in that：The tail gas is located again
It includes tail gas buffer, tail gas absorption kettle and tail gas absorber to manage unit；The tail gas buffer connection neutralization reaction tower is in
With at the top of stabilizer, for the direct seat of tail gas absorber on tail gas absorption kettle, the tail gas absorption kettle connects the tail gas buffer.
10. one kind processing equipment for recycling of tail gas containing HCN according to claim 6, it is characterised in that：The poor-water is de- light
Unit includes lightness-removing column, lightness-removing column top condenser, lightness-removing column top return tank and lightness-removing column reboiler；Described in the lightness-removing column connection
Absorptive unit and desorption unit, lightness-removing column tower reactor are connected to the absorbent cooler of absorptive unit；Lightness-removing column top condenser
Connect at the top of the lightness-removing column, lightness-removing column top return tank be connected to lightness-removing column top condenser and the lightness-removing column it
Between；The lightness-removing column reboiler is connected to the lightness-removing column tower reactor.
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|---|---|---|---|
| CN201810542198.4A CN108479317B (en) | 2018-05-30 | 2018-05-30 | Method and device for recycling tail gas containing HCN |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810542198.4A CN108479317B (en) | 2018-05-30 | 2018-05-30 | Method and device for recycling tail gas containing HCN |
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| CN108479317A true CN108479317A (en) | 2018-09-04 |
| CN108479317B CN108479317B (en) | 2024-01-19 |
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| DE2260248A1 (en) * | 1972-12-08 | 1974-06-12 | Linde Ag | METHOD AND DEVICE FOR THE REMOVAL OF HYDROGEN CYANE FROM GASES |
| US4094958A (en) * | 1977-04-05 | 1978-06-13 | Ciba-Geigy Corporation | Process for the separation of NH3 from a gaseous mixture containing NH3 and HCN |
| CN102502708A (en) * | 2011-10-21 | 2012-06-20 | 重庆紫光化工股份有限公司 | Preparation method for preparing alkali metal or alkali earth metal cyanide with high purity and high yield |
| CN102527213A (en) * | 2011-12-15 | 2012-07-04 | 惠生工程（中国）有限公司 | Tail gas treatment method for acetonitrile refining process |
| CN204447710U (en) * | 2015-01-19 | 2015-07-08 | 河北九天医药化工有限公司 | From containing reclaim cyanogen tail gas hydrogen cyanide prepare Cymag containing cyanogen exhaust gas processing device |
| WO2018074046A1 (en) * | 2016-10-21 | 2018-04-26 | 旭化成株式会社 | Purification method, production process, and distillation device for acrylonitrile |
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2018
- 2018-05-30 CN CN201810542198.4A patent/CN108479317B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2260248A1 (en) * | 1972-12-08 | 1974-06-12 | Linde Ag | METHOD AND DEVICE FOR THE REMOVAL OF HYDROGEN CYANE FROM GASES |
| US4094958A (en) * | 1977-04-05 | 1978-06-13 | Ciba-Geigy Corporation | Process for the separation of NH3 from a gaseous mixture containing NH3 and HCN |
| CN102502708A (en) * | 2011-10-21 | 2012-06-20 | 重庆紫光化工股份有限公司 | Preparation method for preparing alkali metal or alkali earth metal cyanide with high purity and high yield |
| CN102527213A (en) * | 2011-12-15 | 2012-07-04 | 惠生工程（中国）有限公司 | Tail gas treatment method for acetonitrile refining process |
| CN204447710U (en) * | 2015-01-19 | 2015-07-08 | 河北九天医药化工有限公司 | From containing reclaim cyanogen tail gas hydrogen cyanide prepare Cymag containing cyanogen exhaust gas processing device |
| WO2018074046A1 (en) * | 2016-10-21 | 2018-04-26 | 旭化成株式会社 | Purification method, production process, and distillation device for acrylonitrile |
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