CN111608806A - Method and device for recovering tail gas energy in cyclohexanone oxidation production process - Google Patents
Method and device for recovering tail gas energy in cyclohexanone oxidation production process Download PDFInfo
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- CN111608806A CN111608806A CN202010312970.0A CN202010312970A CN111608806A CN 111608806 A CN111608806 A CN 111608806A CN 202010312970 A CN202010312970 A CN 202010312970A CN 111608806 A CN111608806 A CN 111608806A
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- tail gas
- energy
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- oxidation
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- JHIVVAPYMSGYDF-UHFFFAOYSA-N cyclohexanone Chemical compound O=C1CCCCC1 JHIVVAPYMSGYDF-UHFFFAOYSA-N 0.000 title claims abstract description 68
- 238000000034 method Methods 0.000 title claims abstract description 46
- 230000003647 oxidation Effects 0.000 title claims abstract description 40
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 40
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 26
- 238000007084 catalytic combustion reaction Methods 0.000 claims abstract description 19
- 238000011084 recovery Methods 0.000 claims abstract description 17
- 238000006243 chemical reaction Methods 0.000 claims abstract description 11
- 238000006864 oxidative decomposition reaction Methods 0.000 claims abstract description 8
- 230000003197 catalytic effect Effects 0.000 claims abstract description 4
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 6
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 6
- 239000003054 catalyst Substances 0.000 claims description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 6
- 229910001252 Pd alloy Inorganic materials 0.000 claims description 3
- 239000001569 carbon dioxide Substances 0.000 claims description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 3
- VUZPPFZMUPKLLV-UHFFFAOYSA-N methane;hydrate Chemical compound C.O VUZPPFZMUPKLLV-UHFFFAOYSA-N 0.000 claims description 3
- 229910052763 palladium Inorganic materials 0.000 claims description 3
- 229910052697 platinum Inorganic materials 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000007599 discharging Methods 0.000 abstract 1
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- WNLRTRBMVRJNCN-UHFFFAOYSA-N adipic acid Chemical compound OC(=O)CCCCC(O)=O WNLRTRBMVRJNCN-UHFFFAOYSA-N 0.000 description 2
- HGCIXCUEYOPUTN-UHFFFAOYSA-N cyclohexene Chemical compound C1CCC=CC1 HGCIXCUEYOPUTN-UHFFFAOYSA-N 0.000 description 2
- JBKVHLHDHHXQEQ-UHFFFAOYSA-N epsilon-caprolactam Chemical compound O=C1CCCCCN1 JBKVHLHDHHXQEQ-UHFFFAOYSA-N 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000001361 adipic acid Substances 0.000 description 1
- 235000011037 adipic acid Nutrition 0.000 description 1
- -1 alcohol ketone Chemical class 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- HPXRVTGHNJAIIH-UHFFFAOYSA-N cyclohexanol Chemical compound OC1CCCCC1 HPXRVTGHNJAIIH-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 239000005416 organic matter Substances 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- XDTRNDKYILNOAP-UHFFFAOYSA-N phenol;propan-2-one Chemical compound CC(C)=O.OC1=CC=CC=C1 XDTRNDKYILNOAP-UHFFFAOYSA-N 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 239000012855 volatile organic compound Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C3/00—Gas-turbine plants characterised by the use of combustion products as the working fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02C—GAS-TURBINE PLANTS; AIR INTAKES FOR JET-PROPULSION PLANTS; CONTROLLING FUEL SUPPLY IN AIR-BREATHING JET-PROPULSION PLANTS
- F02C6/00—Plural gas-turbine plants; Combinations of gas-turbine plants with other apparatus; Adaptations of gas-turbine plants for special use
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23G—CREMATION FURNACES; CONSUMING WASTE PRODUCTS BY COMBUSTION
- F23G5/00—Incineration of waste; Incinerator constructions; Details, accessories or control therefor
- F23G5/44—Details; Accessories
- F23G5/46—Recuperation of heat
-
- 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
- F23G7/07—Incinerators or other apparatus for consuming industrial waste, e.g. chemicals of waste gases or noxious gases, e.g. exhaust gases in which combustion takes place in the presence of catalytic material
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
The invention discloses a recovery method and a recovery device of tail gas energy in a cyclohexanone oxidation production process, wherein the recovery method comprises the steps of pressurizing air at normal temperature and normal pressure by an air compressor, then feeding the air into an oxidative decomposition unit for reaction, introducing oxidized tail gas generated by the reaction into a catalytic combustion unit, feeding high-temperature and high-pressure tail gas generated by catalytic combustion into a turbine for expansion and work application, converting heat energy and pressure energy into mechanical energy to directly and coaxially drive the air compressor, and directly discharging outlet gas of the turbine to the atmosphere. According to the recovery method and the recovery device, the oxidized tail is sent into a turbine to do work after being subjected to catalytic oxidation, so that the energy consumption in the production process of the cyclohexanone oxidation method can be obviously reduced by about 13.9kg of standard oil/ton of cyclohexanone; the heat energy and the pressure energy are converted into mechanical energy to directly and coaxially drive the air compressor, so that an integrated unit of the air compressor and the tail gas turbine is realized, the loss in the energy conversion process is reduced, the energy recovery efficiency is improved, and meanwhile, the occupied area is saved.
Description
Technical Field
The invention relates to the technical field of cyclohexanone production, in particular to a method and a device for recovering tail gas energy in a cyclohexanone oxidation production process.
Background
Cyclohexanone is an important organic synthetic feedstock and solvent, and is a major intermediate for the manufacture of nylon, caprolactam and adipic acid. At present, the process for producing cyclohexanone mainly comprises a cyclohexane oxidation method and a cyclohexene hydration method, and in the process of producing cyclohexanone by the cyclohexane oxidation method, the pressure of oxidation tail gas discharged from the top of an alcohol ketone absorption tower is very high (more than 1.0MPaG), and the oxidation tail gas contains volatile organic compounds such as cyclohexane, cyclohexanone, cyclohexanol and the like. If the organic components in the tail gas are directly discharged without being recycled, not only the waste of resources is caused, but also the serious problem of environmental pollution is caused.
Patent publication No. CN103446880B discloses a method for recovering energy of industrial exhaust gas, where the industrial exhaust gas is too broad and the purpose is not clear, and the above patent actually refers to a method for recovering energy of exhaust gas of phenol-acetone plant. Patents with publication numbers CN1063625487 and CN208406622U disclose an energy recovery method for oxidized tail gas of a cyclohexanone device, which is to send high-temperature and high-pressure tail gas into an expander for expansion power generation to recover electric energy, and then use the part of recovered electric energy for other purposes; the method has the defects that the voltage of the recovered electric energy is unstable, the recovered electric energy cannot be directly merged into a power grid, and meanwhile, the energy conversion rate is low after the energy is converted for many times.
Disclosure of Invention
The invention aims to solve the problems in the prior art, provides a recovery method and a recovery device for tail gas energy in the production process of a cyclohexanone oxidation method, and has the advantages of simple structure, low investment, high energy recovery efficiency, stable operation, good economic benefit, environmental protection and no pollution.
In order to achieve the purpose, the invention adopts the following technical scheme:
the invention provides a method for recovering tail gas energy in a cyclohexanone oxidation production process, air at normal temperature and normal pressure is pressurized by an air compressor and then enters an oxidative decomposition unit to participate in reaction, oxidized tail gas generated by the reaction is introduced into a catalytic combustion unit, high-temperature and high-pressure tail gas generated by catalytic combustion is sent into a turbine to be expanded and do work, heat energy and pressure energy are converted into mechanical energy to directly and coaxially drive the air compressor, and gas at an outlet of the turbine is directly discharged to the atmosphere.
Further, the content of organic matters in the oxidation tail gas is 100-3000 ppm.
Further, in the catalytic combustion unit, organic matters in the oxidation tail gas are catalytically oxidized into carbon dioxide and water.
Further, the catalyst used for catalytic oxidation is a platinum, palladium or platinum-palladium alloy honeycomb catalyst.
Further, the operating temperature of the high-temperature high-pressure tail gas entering the turbine is 0-800 ℃, and the operating temperature of the outlet gas discharged from the turbine is 0-300 ℃.
Further preferably, the operating temperature of the high-temperature high-pressure tail gas entering the turbine is 100-400 ℃, and the operating temperature of the outlet gas discharged from the turbine is 10-100 ℃.
Further, the operating pressure of the high-temperature high-pressure tail gas entering the turbine is 0.1-2.0MPaG, and the operating pressure of the outlet gas discharged from the turbine is 0-0.08 MPaG.
Further preferably, the operating pressure of the high temperature and high pressure tail gas entering the turbine is 0.5 to 1.5MPaG, and the operating pressure of the outlet gas exiting the turbine is 0 to 0.005 MPaG.
The invention provides a tail gas energy recovery device in the cyclohexanone oxidation production process, which comprises an air compressor, an oxidative decomposition unit, a catalytic combustion unit and a turbine which are sequentially connected by pipelines; wherein the air compressor and turbine are coaxial.
Compared with the prior art, the invention has the following advantages:
according to the method and the device for recovering tail gas energy in the production process of the cyclohexanone oxidation method, the oxidized tail gas is sent into a turbine to do work after being subjected to catalytic oxidation, so that the energy consumption in the production process of the cyclohexanone oxidation method can be obviously reduced by about 13.9kg of standard oil/ton of cyclohexanone; the heat energy and the pressure energy are converted into mechanical energy to directly and coaxially drive the air compressor, so that an integrated unit of the air compressor and the tail gas turbine is realized, the loss in the energy conversion process is reduced, the energy recovery efficiency is improved, and meanwhile, the occupied area is saved.
Drawings
FIG. 1 is a schematic diagram of a process for recovering tail gas energy from a cyclohexanone oxidation process production process in accordance with the present invention;
wherein the reference numerals are:
an air compressor 1; an oxidative decomposition unit 2; a catalytic combustion unit 3; a turbine 4; air 5 at normal temperature and normal pressure; pressurized air 6; oxidizing the tail gas 7; high-temperature high-pressure tail gas 8; and (4) outlet gas 9.
Detailed Description
The present invention will be described in detail and specifically with reference to the following examples to facilitate better understanding of the present invention, but the following examples do not limit the scope of the present invention.
Example 1
Referring to fig. 1, after air 5 at normal temperature and pressure is pressurized by an air compressor 1, pressurized air 6 enters an oxidative decomposition unit 2 to participate in a reaction, oxidized tail gas 7 generated by the reaction is introduced into a catalytic combustion unit 3, high-temperature and high-pressure tail gas 8 generated by catalytic combustion is sent into a turbine 4 to expand and work, heat energy and pressure energy are converted into mechanical energy to directly and coaxially drive the air compressor 1, and outlet gas 9 of the turbine 4 is directly discharged to the atmosphere.
As a preferable technical solution of this embodiment, in the catalytic combustion unit, the organic matter in the oxidized exhaust gas is catalytically oxidized into carbon dioxide and water, and the catalyst used is a platinum, palladium or platinum-palladium alloy honeycomb catalyst.
The embodiment also provides a device for recovering tail gas energy in the production process of the cyclohexanone oxidation method, which comprises an air compressor 1, an oxidative decomposition unit 2, a catalytic combustion unit 3 and a turbine 4 which are sequentially connected by pipelines; wherein the air compressor 1 and the turbine 4 are coaxial.
Example 2
By the recovery method and the recovery apparatus provided in example 1, the production scale was 8 ten thousand tons/year, and the oxidation off-gas emission was 14400Nm3Recovering tail gas energy in the production process of the oxidation method of the/h cyclohexanone, wherein the content of organic matters in the oxidation tail gas 7 is 1500 ppm:
after the oxidized tail gas 7 is sent into the catalytic combustion unit 3, the generated high-temperature and high-pressure tail gas 8 is sent into a turbine 4 to be expanded to do work, and the heat energy and the pressure energy are converted into mechanical energy to directly and coaxially drive the air compressor 1; the operating pressure of the high-temperature high-pressure tail gas 8 entering the turbine 4 after catalytic combustion is 0.40MPaG, and the operating temperature is 120 ℃; the operating pressure of the outlet gas 9 from the turbine 4 is 0.005MPaG and the operating temperature is 80 ℃; can reduce the energy consumption of a cyclohexanone oxidation production device by 13.9kg standard oil/ton cyclohexanone.
Example 3
The recovery method and the recovery apparatus provided in example 1 were used to produce a reaction product with a production scale of 16 ten thousand tons/year and an oxidation exhaust emission of 28800Nm3Recovering tail gas energy in the production process of the oxidation method of the cyclohexanone, wherein the content of organic matters in the oxidation tail gas 7 is 3000 ppm:
after the oxidized tail gas 7 is sent into the catalytic combustion unit 3, the generated high-temperature and high-pressure tail gas 8 is sent into a turbine 4 to be expanded to do work, and the heat energy and the pressure energy are converted into mechanical energy to directly and coaxially drive the air compressor 1; the operating pressure of the high-temperature high-pressure tail gas 8 entering the turbine 4 after catalytic combustion is 1.2MPaG, and the operating temperature is 330 ℃; the operating pressure of the outlet gas 9 from the turbine 4 is 0.01MPaG and the operating temperature is 100 ℃; can reduce the energy consumption of a cyclohexanone oxidation production device by 13.9kg standard oil/ton cyclohexanone.
While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.
Claims (9)
1. A method for recovering tail gas energy in a cyclohexanone oxidation production process is characterized in that air at normal temperature and normal pressure is pressurized by an air compressor and then enters an oxidative decomposition unit to participate in reaction, oxidized tail gas generated by the reaction is introduced into a catalytic combustion unit, high-temperature and high-pressure tail gas generated by catalytic combustion is sent into a turbine to be expanded and do work, heat energy and pressure energy are converted into mechanical energy to directly and coaxially drive the air compressor, and gas at an outlet of the turbine is directly discharged to the atmosphere.
2. The method for recovering tail gas energy in the process of producing cyclohexanone by oxidation according to claim 1, wherein the content of organic matters in the oxidation tail gas is 100-3000 ppm.
3. The method for recovering tail gas energy in the cyclohexanone oxidation process production process according to claim 1, wherein in the catalytic combustion unit, organic matters in the oxidation tail gas are catalytically oxidized into carbon dioxide and water.
4. The method for recovering tail gas energy in the cyclohexanone oxidation process production process according to claim 1, wherein the catalyst used for catalytic oxidation is a platinum, palladium or platinum-palladium alloy honeycomb catalyst.
5. The method for recovering tail gas energy in the cyclohexanone oxidation process production process according to claim 1, wherein the operating temperature of the high-temperature high-pressure tail gas entering the turbine is 0 to 800 ℃, and the operating temperature of the outlet gas discharged from the turbine is 0 to 300 ℃.
6. The method for recovering tail gas energy in the cyclohexanone oxidation process production process as claimed in claim 5, wherein the operating temperature of the high-temperature and high-pressure tail gas entering the turbine is 100-400 ℃, and the operating temperature of the outlet gas discharged from the turbine is 10-100 ℃.
7. The method for recovering tail gas energy in the oxidation process for producing cyclohexanone according to claim 1, wherein the operating pressure of the high-temperature high-pressure tail gas entering the turbine is 0.1-2.0MPaG, and the operating pressure of the outlet gas discharged from the turbine is 0-0.08 MPaG.
8. The method of claim 7, wherein the operating pressure of the high temperature and high pressure tail gas entering the turbine is 0.5 to 1.5MPaG, and the operating pressure of the outlet gas exiting the turbine is 0 to 0.005 MPaG.
9. A device for recovering tail gas energy in the cyclohexanone oxidation production process based on the recovery method of any one of claims 1 to 8, which is characterized by comprising an air compressor, an oxidative decomposition unit, a catalytic combustion unit and a turbine which are sequentially connected by pipelines; wherein the air compressor and turbine are coaxial.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010312970.0A CN111608806A (en) | 2020-04-20 | 2020-04-20 | Method and device for recovering tail gas energy in cyclohexanone oxidation production process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010312970.0A CN111608806A (en) | 2020-04-20 | 2020-04-20 | Method and device for recovering tail gas energy in cyclohexanone oxidation production process |
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| CN111608806A true CN111608806A (en) | 2020-09-01 |
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| CN202010312970.0A Pending CN111608806A (en) | 2020-04-20 | 2020-04-20 | Method and device for recovering tail gas energy in cyclohexanone oxidation production process |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113310060A (en) * | 2021-07-01 | 2021-08-27 | 沧州旭阳化工有限公司 | Atmospheric tank tail gas treatment system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4539303A (en) * | 1978-06-28 | 1985-09-03 | Texaco Inc. | Process for improving power recovery from regeneration gas under turndown conditions |
| CN1192262A (en) * | 1995-06-05 | 1998-09-02 | 帝国化学工业公司 | Effluent gas treatment |
| CN1200681A (en) * | 1995-09-12 | 1998-12-02 | Basf公司 | Method for removing nitrogen oxides contained in gas stream |
| CN101194090A (en) * | 2005-02-18 | 2008-06-04 | 普莱克斯技术有限公司 | Gas turbine fuel preparation and introduction method |
| CN101616885A (en) * | 2007-02-28 | 2009-12-30 | 株式会社日立工业设备技术 | The processing of oxidation reaction flue gas and energy reclaiming method |
| CN102770626A (en) * | 2008-05-06 | 2012-11-07 | 英威达技术有限公司 | Power recovery |
| CN203478264U (en) * | 2013-08-31 | 2014-03-12 | 中石化南京工程有限公司 | Efficient cyclohexanone spent caustic resource utilization system |
-
2020
- 2020-04-20 CN CN202010312970.0A patent/CN111608806A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4539303A (en) * | 1978-06-28 | 1985-09-03 | Texaco Inc. | Process for improving power recovery from regeneration gas under turndown conditions |
| CN1192262A (en) * | 1995-06-05 | 1998-09-02 | 帝国化学工业公司 | Effluent gas treatment |
| CN1200681A (en) * | 1995-09-12 | 1998-12-02 | Basf公司 | Method for removing nitrogen oxides contained in gas stream |
| CN101194090A (en) * | 2005-02-18 | 2008-06-04 | 普莱克斯技术有限公司 | Gas turbine fuel preparation and introduction method |
| CN101616885A (en) * | 2007-02-28 | 2009-12-30 | 株式会社日立工业设备技术 | The processing of oxidation reaction flue gas and energy reclaiming method |
| CN102770626A (en) * | 2008-05-06 | 2012-11-07 | 英威达技术有限公司 | Power recovery |
| CN203478264U (en) * | 2013-08-31 | 2014-03-12 | 中石化南京工程有限公司 | Efficient cyclohexanone spent caustic resource utilization system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113310060A (en) * | 2021-07-01 | 2021-08-27 | 沧州旭阳化工有限公司 | Atmospheric tank tail gas treatment system and method |
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Application publication date: 20200901 |