CN102372616A - Flue gas circulation process and apparatus - Google Patents
Flue gas circulation process and apparatus Download PDFInfo
- Publication number
- CN102372616A CN102372616A CN2010102503204A CN201010250320A CN102372616A CN 102372616 A CN102372616 A CN 102372616A CN 2010102503204 A CN2010102503204 A CN 2010102503204A CN 201010250320 A CN201010250320 A CN 201010250320A CN 102372616 A CN102372616 A CN 102372616A
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- CN
- China
- Prior art keywords
- gas
- formaldehyde
- stack
- steam
- air outlet
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 13
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 7
- 239000003546 flue gas Substances 0.000 title claims abstract description 7
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 78
- 239000007789 gas Substances 0.000 claims abstract description 78
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 14
- 238000000926 separation method Methods 0.000 claims abstract description 7
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000001301 oxygen Substances 0.000 claims abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 5
- 239000007787 solid Substances 0.000 claims abstract description 5
- 238000005406 washing Methods 0.000 claims abstract description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 238000007599 discharging Methods 0.000 claims description 12
- 238000005516 engineering process Methods 0.000 claims description 9
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 5
- 238000000605 extraction Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 8
- 239000004615 ingredient Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
- 238000006243 chemical reaction Methods 0.000 description 3
- DSMZRNNAYQIMOM-UHFFFAOYSA-N iron molybdenum Chemical compound [Fe].[Fe].[Mo] DSMZRNNAYQIMOM-UHFFFAOYSA-N 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 239000003054 catalyst Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000007800 oxidant agent Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 239000006200 vaporizer Substances 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Abstract
The invention relates to the technical field of formaldehyde production, and especially a flue gas circulation process and an apparatus for formaldehyde production. Methanol, oxygen, ingredient steam and flue gas are fully mixed to generate formaldehyde containing gas; the gas is treated to recover a formaldehyde finished product, and remaining tail gas, which can not be absorbed, is burned; steam generated from burning is for usage of the system itself; part of discharge gas generated from burning enters into a washing tower and is treated with washing to remove solid particles for discharge gas purification; remaining discharge gas is directly emptied; purified discharge gas enters into a gas-liquid separator for gas-liquid separation, and separated gas enters into a gas pipeline as flue gas for reuse. The method has advantages of reduced methanol unit consumption, enhanced high operating safety, high yield and high formaldehyde concentration.
Description
Technical field
The present invention relates to the production technical field of formaldehyde, in particular for stack gas circulation technology and the device in the Formaldehyde Production.
Background technology
Present formaldehyde more than 90% gets from methanol oxidation, also has from hydro carbons direct oxidation or dme oxidation and produces.With methyl alcohol is the method for raw material production formaldehyde, is divided into " silver-colored method " and " iron molybdenum method ".Compare with iron molybdenum method, silver-colored method less investment, technical process is simple.And iron molybdenum method flow process is complicated, the investment is big, power consumption height and product formic acid content are high.Therefore, the most domestic formaldehyde plant adopts silver-colored method.Domestic silver-colored legal system formaldehyde; In nearly 20 years history; Experienced by of the progress of float stone silver catalyst to catalyst for electrolytic silver; Experienced the progress that waste heat boiler and tail gas boiler grow out of nothing, experienced the progress of horizontalboiler, experienced vaporizer and be heated to progress by hot water or the heating of hot formaldehyde by water vapor to vertical boilers.Formaldehyde Production equipment commonly used at present, its final tail gas that produces directly is disposed to atmosphere, causes vent gas to utilize again, makes the consumption of feed proportioning steam increase greatly.
Summary of the invention
The technical problem that the present invention will solve is: shortcoming and deficiency in order to solve above-mentioned existence provide a kind of stack gas circulation technology and device.
The technical solution adopted for the present invention to solve the technical problems is: a kind of flue gas recirculation technology
A, methyl alcohol, oxygen, batching steam, stack gas are mixed fully, react then to generate the gas that contains formaldehyde, and gas is extraction formaldehyde finished product after treatment, carries out burning disposal and remain nonabsorbable tail gas;
The steam that b, burning back produce supplies system self to use, and the discharging gas part that the burning back produces is washed to remove solid particulate, the direct emptying of all the other discharging gas;
Discharging gas after c, the washing carries out gas-liquid separation, and the gas after the separation uses as stack gas.
The stack gas circulation device; Water wash column with the exhaust gas processing device air outlet that is arranged on formaldehyde equipment tail end; The top of water wash column is connected with gas-liquid separator; The place, air outlet of gas-liquid separator is provided with gas is sent into the gas pipeline in the mixing tank on the formaldehyde equipment, is connected with recycle blower on the gas pipeline.For Formaldehyde Production equipment stack gas is provided through circulation device, reduces the consumption of batching steam, improve output.
Further, the recycle blower air outlet side on the described gas pipeline also is provided with preheater
The invention has the beneficial effects as follows that stack gas circulation technology of the present invention and device reduce the methyl alcohol unit consumption, improve processing safety, and output are big, concentration of formaldehyde is high.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the present invention is further specified.
Fig. 1 is a structural representation of the present invention.
Among the figure 1, water wash column, 2, gas-liquid separator, 3, gas pipeline, 4, recycle blower, 5, preheater.
Embodiment
Combine accompanying drawing that the present invention is done further detailed explanation now.These accompanying drawings are the synoptic diagram of simplification, substruction of the present invention only is described in a schematic way, so it only show the formation relevant with the present invention.
Flue gas recirculation technology
A, methyl alcohol, oxygen, batching steam, stack gas are mixed fully, react then to generate the gas that contains formaldehyde, and gas is extraction formaldehyde finished product after treatment, carries out burning disposal and remain nonabsorbable tail gas;
The steam that b, burning back produce supplies system self to use, and the discharging gas part that the burning back produces is washed to remove solid particulate, the direct emptying of all the other discharging gas;
Discharging gas after c, the washing carries out gas-liquid separation, and the gas after the separation uses as stack gas.
The stack gas circulation device of preferred forms as shown in Figure 1; Be used for Formaldehyde Production equipment; Have the water wash column 1 of the exhaust gas processing device air outlet that is arranged on formaldehyde equipment tail end, the top of water wash column 1 is connected with gas-liquid separator 2, and the place, air outlet of gas-liquid separator 2 is provided with gas is sent into the gas pipeline in the mixing tank 3 on the formaldehyde equipment; Be connected with recycle blower 4 on the gas pipeline 3, recycle blower 4 air outlet sides on the gas pipeline 3 also are provided with preheater 5.
Methyl alcohol, airborne oxygen, in the mixing tank of formaldehyde equipment, mix the back from the batching steam of formaldehyde device systems and stack gas and get into the oxidizer internal reaction; The gas mixture that contains formaldehyde after the reaction gets into the absorption tower and absorbs; The nonabsorbable tail gas that top of tower produces after absorbing is delivered to exhaust gas processing device and is burned the recovery heat; Be used to produce steam, and burn the discharging gas part entering water wash column 1 that the back produces, all the other directly discharge atmosphere.The discharging gas that gets in the water wash column 1 is removed solid particulate such as dust; Purified the gas in it; Owing in water wash column 1 interior effluent air, have liquid; So discharging gas gets into gas pipeline 3 as the stack gas use through the gas that gets into behind the water wash column 1 after gas-liquid separator 2 separates, and by the recycle blower 4 that is connected on the pipeline stack gas is blasted in the preheater 5, the stack gas after the preheating directly gets in the mixing tank and uses.The effect of stack gas is similar with batching steam, can remove reaction heat, in mixing tank, increases stack gas and can reduce the batching steam consumption.
With above-mentioned foundation desirable embodiment of the present invention is enlightenment, and through above-mentioned description, the related work personnel can carry out various change and modification fully in the scope that does not depart from this invention technological thought.The technical scope of this invention is not limited to the content on the specification sheets, must confirm its technical scope according to the claim scope.
Claims (3)
1. flue gas recirculation technology, it is characterized in that: technological process is following
A, methyl alcohol, oxygen, batching steam, stack gas are mixed fully, react then to generate the gas that contains formaldehyde, and gas is extraction formaldehyde finished product after treatment, carries out burning disposal and remain nonabsorbable tail gas;
The steam that b, burning back produce supplies system self to use, and the discharging gas part that the burning back produces is washed to remove solid particulate, the direct emptying of all the other discharging gas;
Discharging gas after c, the washing carries out gas-liquid separation, and the gas after the separation uses as stack gas.
2. the device of technology according to claim 1; It is characterized in that: water wash column (1) with the exhaust gas processing device air outlet that is arranged on formaldehyde equipment tail end; The top of water wash column (1) is connected with gas-liquid separator (2); The place, air outlet of gas-liquid separator (2) is provided with gas is sent into the gas pipeline in the mixing tank (3) on the formaldehyde equipment, is connected with recycle blower (4) on the gas pipeline (3).
3. stack gas circulation device according to claim 1 is characterized in that: recycle blower (4) air outlet side on the described gas pipeline (3) also is provided with preheater (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010250320.4A CN102372616B (en) | 2010-08-09 | 2010-08-09 | Flue gas circulation process and apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201010250320.4A CN102372616B (en) | 2010-08-09 | 2010-08-09 | Flue gas circulation process and apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102372616A true CN102372616A (en) | 2012-03-14 |
| CN102372616B CN102372616B (en) | 2014-06-18 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010250320.4A Expired - Fee Related CN102372616B (en) | 2010-08-09 | 2010-08-09 | Flue gas circulation process and apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102372616B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109232217A (en) * | 2018-11-08 | 2019-01-18 | 山东明化新材料有限公司 | A kind of flue gas recirculation prepn. of formaldehyde and its device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671239A (en) * | 2009-10-14 | 2010-03-17 | 江阴市华燕石化机械装备有限公司 | Double circulation system and double circulation process for preparing formaldehyde |
| CN201751409U (en) * | 2010-08-09 | 2011-02-23 | 江苏恒茂机械制造有限公司 | Stack gas circulating device |
-
2010
- 2010-08-09 CN CN201010250320.4A patent/CN102372616B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101671239A (en) * | 2009-10-14 | 2010-03-17 | 江阴市华燕石化机械装备有限公司 | Double circulation system and double circulation process for preparing formaldehyde |
| CN201751409U (en) * | 2010-08-09 | 2011-02-23 | 江苏恒茂机械制造有限公司 | Stack gas circulating device |
Non-Patent Citations (3)
| Title |
|---|
| 宋界新: "甲醇在银催化剂上催化氧化制浓甲醛的尾气循环工艺研究", 《广东化工》 * |
| 王志红: "甲醇吹除气中氢回收方法浅析", 《化工设计通讯》 * |
| 薛琪: "尾气循环银法甲醛生产工艺", 《精细与专用化学品》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109232217A (en) * | 2018-11-08 | 2019-01-18 | 山东明化新材料有限公司 | A kind of flue gas recirculation prepn. of formaldehyde and its device |
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| Publication number | Publication date |
|---|---|
| CN102372616B (en) | 2014-06-18 |
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