CN113262580A - Acetic acid recovery method for furfural production waste gas - Google Patents
Acetic acid recovery method for furfural production waste gas Download PDFInfo
- Publication number
- CN113262580A CN113262580A CN202110643886.1A CN202110643886A CN113262580A CN 113262580 A CN113262580 A CN 113262580A CN 202110643886 A CN202110643886 A CN 202110643886A CN 113262580 A CN113262580 A CN 113262580A
- Authority
- CN
- China
- Prior art keywords
- acetic acid
- waste gas
- furfural production
- recovery method
- acid recovery
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
- B01D46/10—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces
- B01D46/12—Particle separators, e.g. dust precipitators, using filter plates, sheets or pads having plane surfaces in multiple arrangements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D47/00—Separating dispersed particles from gases, air or vapours by liquid as separating agent
- B01D47/06—Spray cleaning
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
- B01D50/60—Combinations of devices covered by groups B01D46/00 and B01D47/00
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D307/00—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom
- C07D307/02—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings
- C07D307/34—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members
- C07D307/38—Heterocyclic compounds containing five-membered rings having one oxygen atom as the only ring hetero atom not condensed with other rings having two or three double bonds between ring members or between ring members and non-ring members with substituted hydrocarbon radicals attached to ring carbon atoms
- C07D307/40—Radicals substituted by oxygen atoms
- C07D307/46—Doubly bound oxygen atoms, or two oxygen atoms singly bound to the same carbon atom
- C07D307/48—Furfural
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Treating Waste Gases (AREA)
Abstract
The invention provides an acetic acid recovery method for furfural production waste gas. The technical scheme is that waste gas is heated to a certain temperature through a physical method to adjust the fluidity of the waste gas, and particulate matters and viscous impurities are removed through a filtering method on the basis; then contacting with an absorbent in an absorption tower to settle the acetic acid and respectively obtain a crude acetic acid extract and a primary waste gas; then, carrying out catalytic combustion on the primary waste gas to remove organic matters, then carrying out countercurrent contact on the primary waste gas by using an oxidizing spray liquid, settling particles under a boiling state, and finally filtering and discharging; and (3) flocculating and precipitating the acetic acid crude extract, and then performing flash evaporation concentration and vacuum evaporation concentration to finally obtain an acetic acid recovery finished product. The invention not only can effectively treat the waste gas generated in the furfural production, but also can recycle the acetic acid component in the furfural production, and the process efficiency and the economic added value both reach higher levels.
Description
Technical Field
The invention relates to the technical field of chemical industry, in particular to an acetic acid recovery method for furfural production waste gas.
Background
The furfural is colorless and transparent oily liquid generated by hydrolyzing and dehydrating pentosan in a plant fiber raw material, is mainly used for producing furan derivatives (such as furfuryl alcohol, tetrahydrofurfuryl alcohol, methyl furan, decarbonylation furan, oxidation furoic acid, nitrofurans and the like), and is also used as a selective solvent for separating unsaturated compounds in saturated aliphatic compounds (such as petroleum lubricating oil, gasoline, kerosene and vegetable oil), a decoloring agent for rosin and a solvent for resin production, and an extractive distillation solvent for separating butadiene and the like from a C4 fraction.
The furfural is produced by taking agricultural wastes such as oat hulls, corncobs, cottonseed hulls, rice hulls, peanut hulls, buckwheat hulls, corn stalks and wheat straws as raw materials, and the production process comprises the processes of stirring, hydrolysis, steam treatment, condensation, distillation, neutralization, refining and the like, wherein steam (aldehyde steam) discharged from a hydrolysis pot contains a certain amount of acetic acid and is subjected to neutralization treatment before entering a distillation tower. The neutralization treatment is realized by controlling pure alkali liquor (calcium oxide or sodium hydroxide) through a gas-phase neutralization pipe by a needle valve; the neutralized liquid is sent to a treatment section for decomposing acetic acid after passing through a vapor-liquid separator, and aldehyde vapor enters a condenser for condensation.
The waste gas containing acetic acid not only has influence on the ecological environment, but also has great harm to the health of human bodies. The acetic acid has strong smell, and a large amount of smell easily escapes in the production process, so that the body and mind of people around the acetic acid are easily unpleasant. Aiming at the problem, in the prior art, a physical and chemical method is generally adopted to treat the acetic acid component and then discharge waste gas, and the commonly used method comprises a combustion method, an oxidation method, an absorption method, an adsorption method and the like.
Disclosure of Invention
The invention aims to solve the technical defects of the prior art, and provides an acetic acid recovery method for furfural production waste gas, so as to solve the technical problems that the conventional treatment method for furfural production waste gas has high energy consumption and complex process and cannot utilize acetic acid components.
In order to achieve the technical purpose, the invention adopts the following technical scheme:
the acetic acid recovery method for the furfural production waste gas comprises the following steps:
1) heating furfural production waste gas to 40-50 ℃, and carrying out three-stage filtration to remove particles and sticky substances;
2) feeding the waste gas treated in the step 1) into an absorption tower through an induced draft fan, adsorbing acetic acid after an absorbent fed from the top of the absorption tower is contacted with the waste gas fed from the middle part of the absorption tower, and feeding the adsorbed acetic acid crude extract out of the absorption tower through an acid-resistant pump communicated with an outlet at the bottom of the absorption tower;
3) burning the residual gas by using a fluidized bed combustion device, so that the temperature of the gas discharged by the fluidized bed combustion device is greater than or equal to 1200 ℃;
4) uniformly mixing the waste gas treated in the step 3) with air, sending the mixture into a spray tower to flow in a reverse direction with spray water, removing large-particle-size liquid drops carried by saturated wet air by using a demisting device, and filtering and discharging settled liquid;
5) adding a flocculating agent into the acetic acid crude extract obtained in the step 2) for precipitation, and then sequentially carrying out primary flash evaporation concentration separation and secondary vacuum evaporation concentration to obtain an acetic acid recovery product.
Preferably, the particle sizes of the three-stage filtration in the step 1) are 1mm, 0.1mm and 0.01mm respectively.
Preferably, the flow rate of the induced draft fan in the step 2) is 20m3/h。
Preferably, the absorbent in the step 2) is disodium ethylene diamine tetraacetate or ammonium metavanadate, and the ratio of the flow rate of the absorbent to the flow rate of the induced draft fan is 2: 1.
Preferably, manganese dioxide catalyst is added to the fluidized bed combustion apparatus in step 3).
Preferably, the spray water in the step 4) comprises the following components in parts by weight: 30 parts of water, 0.2 part of potassium permanganate, 0.2 part of 3-phosphoglyceric acid and 0.1 part of polyethylene glycol.
Preferably, the flocculant in the step 5) is polyaluminium chloride or polyferric sulfate, and the mass ratio of the addition amount of the flocculant to the acetic acid crude extract is 0.2: 1.
The invention provides an acetic acid recovery method for furfural production waste gas. The technical scheme is that waste gas is heated to a certain temperature through a physical method to adjust the fluidity of the waste gas, and particulate matters and viscous impurities are removed through a filtering method on the basis; then contacting with an absorbent in an absorption tower to settle the acetic acid and respectively obtain a crude acetic acid extract and a primary waste gas; then, carrying out catalytic combustion on the primary waste gas to remove organic matters, then carrying out countercurrent contact on the primary waste gas by using an oxidizing spray liquid, settling particles under a boiling state, and finally filtering and discharging; and (3) flocculating and precipitating the acetic acid crude extract, and then performing flash evaporation concentration and vacuum evaporation concentration to finally obtain an acetic acid recovery finished product. The invention not only can effectively treat the waste gas generated in the furfural production, but also can recycle the acetic acid component in the furfural production, and the process efficiency and the economic added value both reach higher levels.
Detailed Description
Hereinafter, specific embodiments of the present invention will be described in detail. Well-known structures or functions may not be described in detail in the following embodiments in order to avoid unnecessarily obscuring the details. Approximating language, as used herein in the following examples, may be applied to identify quantitative representations that could permissibly vary in number without resulting in a change in the basic function. Unless defined otherwise, technical and scientific terms used in the following examples have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
Example 1
The acetic acid recovery method for the furfural production waste gas comprises the following steps:
1) heating furfural production waste gas to 40-50 ℃, and carrying out three-stage filtration to remove particles and sticky substances;
2) feeding the waste gas treated in the step 1) into an absorption tower through an induced draft fan, adsorbing acetic acid after an absorbent fed from the top of the absorption tower is contacted with the waste gas fed from the middle part of the absorption tower, and feeding the adsorbed acetic acid crude extract out of the absorption tower through an acid-resistant pump communicated with an outlet at the bottom of the absorption tower;
3) burning the residual gas by using a fluidized bed combustion device, so that the temperature of the gas discharged by the fluidized bed combustion device is greater than or equal to 1200 ℃;
4) uniformly mixing the waste gas treated in the step 3) with air, sending the mixture into a spray tower to flow in a reverse direction with spray water, removing large-particle-size liquid drops carried by saturated wet air by using a demisting device, and filtering and discharging settled liquid;
5) adding a flocculating agent into the acetic acid crude extract obtained in the step 2) for precipitation, and then sequentially carrying out primary flash evaporation concentration separation and secondary vacuum evaporation concentration to obtain an acetic acid recovery product.
Example 2
The acetic acid recovery method for the furfural production waste gas comprises the following steps:
1) heating furfural production waste gas to 40-50 ℃, and carrying out three-stage filtration to remove particles and sticky substances;
2) feeding the waste gas treated in the step 1) into an absorption tower through an induced draft fan, adsorbing acetic acid after an absorbent fed from the top of the absorption tower is contacted with the waste gas fed from the middle part of the absorption tower, and feeding the adsorbed acetic acid crude extract out of the absorption tower through an acid-resistant pump communicated with an outlet at the bottom of the absorption tower;
3) burning the residual gas by using a fluidized bed combustion device, so that the temperature of the gas discharged by the fluidized bed combustion device is greater than or equal to 1200 ℃;
4) uniformly mixing the waste gas treated in the step 3) with air, sending the mixture into a spray tower to flow in a reverse direction with spray water, removing large-particle-size liquid drops carried by saturated wet air by using a demisting device, and filtering and discharging settled liquid;
5) adding a flocculating agent into the acetic acid crude extract obtained in the step 2) for precipitation, and then sequentially carrying out primary flash evaporation concentration separation and secondary vacuum evaporation concentration to obtain an acetic acid recovery product.
Wherein, the step 1) has three stagesThe particle sizes of the filtered solution are 1mm, 0.1mm and 0.01mm respectively. The flow of the induced draft fan in the step 2) is 20m3H is used as the reference value. In the step 2), the absorbent is ethylene diamine tetraacetic acid or ammonium metavanadate, and the ratio of the flow of the absorbent to the flow of the induced draft fan is 2: 1. In the step 3), manganese dioxide catalyst is added into the fluidized bed combustion device. And step 4), the spray water comprises the following components in parts by weight: 30 parts of water, 0.2 part of potassium permanganate, 0.2 part of 3-phosphoglyceric acid and 0.1 part of polyethylene glycol. And 5) the flocculating agent is polyaluminium chloride or polyferric sulfate, and the mass ratio of the adding amount of the flocculating agent to the acetic acid crude extract is 0.2: 1.
The embodiments of the present invention have been described in detail, but the description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention. Any modification, equivalent replacement, and improvement made within the scope of the application of the present invention should be included in the protection scope of the present invention.
Claims (7)
1. The acetic acid recovery method for the furfural production waste gas is characterized by comprising the following steps of:
1) heating furfural production waste gas to 40-50 ℃, and carrying out three-stage filtration to remove particles and sticky substances;
2) feeding the waste gas treated in the step 1) into an absorption tower through an induced draft fan, adsorbing acetic acid after an absorbent fed from the top of the absorption tower is contacted with the waste gas fed from the middle part of the absorption tower, and feeding the adsorbed acetic acid crude extract out of the absorption tower through an acid-resistant pump communicated with an outlet at the bottom of the absorption tower;
3) burning the residual gas by using a fluidized bed combustion device, so that the temperature of the gas discharged by the fluidized bed combustion device is greater than or equal to 1200 ℃;
4) uniformly mixing the waste gas treated in the step 3) with air, sending the mixture into a spray tower to flow in a reverse direction with spray water, removing large-particle-size liquid drops carried by saturated wet air by using a demisting device, and filtering and discharging settled liquid;
5) adding a flocculating agent into the acetic acid crude extract obtained in the step 2) for precipitation, and then sequentially carrying out primary flash evaporation concentration separation and secondary vacuum evaporation concentration to obtain an acetic acid recovery product.
2. The acetic acid recovery method for furfural production waste gas according to claim 1, characterized in that the particle diameters of the tertiary filtration in step 1) are 1mm, 0.1mm, and 0.01mm, respectively.
3. The acetic acid recovery method for furfural production exhaust gas according to claim 1, characterized in that the flow rate of the induced draft fan in step 2) is 20m3/h。
4. The acetic acid recovery method for the waste gas from furfural production according to claim 1, wherein the absorbent in step 2) is disodium ethylene diamine tetraacetate or ammonium metavanadate, and the ratio of the flow rate of the absorbent to the flow rate of the induced draft fan is 2: 1.
5. The method for recovering acetic acid from the exhaust gas from furfural production according to claim 1, wherein manganese dioxide catalyst is added to the fluidized bed combustion apparatus in step 3).
6. The acetic acid recovery method for furfural production waste gas according to claim 1, characterized in that the spray water of step 4) comprises the following components in parts by weight: 30 parts of water, 0.2 part of potassium permanganate, 0.2 part of 3-phosphoglyceric acid and 0.1 part of polyethylene glycol.
7. The acetic acid recovery method for the waste gas from furfural production according to claim 1, characterized in that the flocculant in step 5) is polyaluminium chloride or polyferric sulfate, and the mass ratio of the addition amount of the flocculant to the acetic acid crude extract is 0.2: 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110643886.1A CN113262580A (en) | 2021-06-09 | 2021-06-09 | Acetic acid recovery method for furfural production waste gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110643886.1A CN113262580A (en) | 2021-06-09 | 2021-06-09 | Acetic acid recovery method for furfural production waste gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113262580A true CN113262580A (en) | 2021-08-17 |
Family
ID=77234983
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110643886.1A Pending CN113262580A (en) | 2021-06-09 | 2021-06-09 | Acetic acid recovery method for furfural production waste gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113262580A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114471102A (en) * | 2022-01-27 | 2022-05-13 | 宏业生物科技股份有限公司 | Method for reducing emission of VOCs (volatile organic compounds) in furfural residues |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101108296A (en) * | 2007-08-23 | 2008-01-23 | 上海同济华康环境科技有限公司 | Process method of purifying and recycling mixed organic waste gas |
| CN101920152A (en) * | 2009-06-09 | 2010-12-22 | 中国石油化工股份有限公司 | Method for treating organic matters in large-capacity industrial waste gas |
| CN203790798U (en) * | 2014-04-01 | 2014-08-27 | 中糠有限公司 | Purification treatment system for waste gas produced in production process of furfural |
| CN105233606A (en) * | 2015-10-23 | 2016-01-13 | 上海毅知实业有限公司 | Device for treating waste gas generated during furfural production |
| CN106178824A (en) * | 2016-08-29 | 2016-12-07 | 无锡华烨除锈涂装设备有限公司 | VOCs treatment technique |
| CN106563343A (en) * | 2015-10-10 | 2017-04-19 | 余姚市婉珍五金厂 | Method for purifying and treating spray paint waste gas |
-
2021
- 2021-06-09 CN CN202110643886.1A patent/CN113262580A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101108296A (en) * | 2007-08-23 | 2008-01-23 | 上海同济华康环境科技有限公司 | Process method of purifying and recycling mixed organic waste gas |
| CN101920152A (en) * | 2009-06-09 | 2010-12-22 | 中国石油化工股份有限公司 | Method for treating organic matters in large-capacity industrial waste gas |
| CN203790798U (en) * | 2014-04-01 | 2014-08-27 | 中糠有限公司 | Purification treatment system for waste gas produced in production process of furfural |
| CN106563343A (en) * | 2015-10-10 | 2017-04-19 | 余姚市婉珍五金厂 | Method for purifying and treating spray paint waste gas |
| CN105233606A (en) * | 2015-10-23 | 2016-01-13 | 上海毅知实业有限公司 | Device for treating waste gas generated during furfural production |
| CN106178824A (en) * | 2016-08-29 | 2016-12-07 | 无锡华烨除锈涂装设备有限公司 | VOCs treatment technique |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114471102A (en) * | 2022-01-27 | 2022-05-13 | 宏业生物科技股份有限公司 | Method for reducing emission of VOCs (volatile organic compounds) in furfural residues |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| RU2558364C2 (en) | Method of autocatalytic ethrification of fatty acids | |
| CN111807384B (en) | Polyolefin magnesium titanium catalyst production residue treatment process | |
| WO2022042367A1 (en) | System for synthesizing adsorbent of vocs from fly ash and waste grease | |
| CN110357312A (en) | A kind of landfill leachate harmless resource system processing equipment and method | |
| CN113262580A (en) | Acetic acid recovery method for furfural production waste gas | |
| KR101623864B1 (en) | Method and apparatus for purifying glycerin generated in the preparing of bio diesel | |
| WO2006066469A1 (en) | Production method of snow-melting agent of calcium acetate | |
| CN104724778A (en) | Method for salt extraction from desulfurization waste solution through multi-effect evaporation | |
| CN111115933B (en) | Flame-free torch type ultra-clean emission process for VOCs-containing high ammonia nitrogen wastewater | |
| CN111153416A (en) | System and method for preparing ammonium sulfate from active coke desulfurization rich gas | |
| CN106698783B (en) | A kind for the treatment of process of epoxy grease plasticizer production waste water | |
| CN110538559B (en) | Waste gas treatment process for workshop discharge in biopharmaceutical industry | |
| CN211999667U (en) | Fermentation cylinder tail gas processing apparatus | |
| CN110143937B (en) | Method for simultaneously recycling furfural product and sulfuric acid catalyst from furfural residues | |
| CN207313149U (en) | A kind of device that sodium sulfite is produced using catalytic cracking flue gas | |
| CN112717653A (en) | Energy-saving environment-friendly ammonia desulphurization zero-emission system and method of sulfur recovery device | |
| CN110605124B (en) | Organic peroxide catalytic oxidation catalyst and preparation method and application thereof | |
| JPS6022997B2 (en) | How to use wastewater | |
| CN112225421A (en) | Pyrolysis and carbonization gas treatment device for oily sludge treatment system | |
| CN111706867A (en) | Integrated treatment technology for drying and gasifying oil-containing sludge | |
| CN105271585A (en) | Method for processing wastewater generated in a process for preparing butadiene through oxidative dehydrogenation of industrial butylene | |
| CN204981717U (en) | Production system of polyamide | |
| CN205008117U (en) | Centrifugal separation device of dimeric acid roughcasts | |
| CN109053416A (en) | Furfural exhaust gas produces sodium acetate new process | |
| CN203904132U (en) | Device for treating wastewater generated in production of butadiene by virtue of oxidative dehydrogenation of industrial butene |
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: 20210817 |
|
| RJ01 | Rejection of invention patent application after publication |