CN102372616B - Flue gas circulation process and apparatus - Google Patents
Flue gas circulation process and apparatus Download PDFInfo
- Publication number
- CN102372616B CN102372616B CN201010250320.4A CN201010250320A CN102372616B CN 102372616 B CN102372616 B CN 102372616B CN 201010250320 A CN201010250320 A CN 201010250320A CN 102372616 B CN102372616 B CN 102372616B
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- Prior art keywords
- gas
- formaldehyde
- burning
- discharge
- flue gas
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- 238000000034 method Methods 0.000 title claims abstract description 20
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 11
- 239000003546 flue gas Substances 0.000 title claims abstract description 11
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 72
- 239000007789 gas Substances 0.000 claims abstract description 69
- OKKJLVBELUTLKV-UHFFFAOYSA-N Methanol Chemical compound OC OKKJLVBELUTLKV-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000007788 liquid Substances 0.000 claims abstract description 12
- 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
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 claims description 6
- 238000000605 extraction Methods 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000004615 ingredient Substances 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 10
- DSMZRNNAYQIMOM-UHFFFAOYSA-N iron molybdenum Chemical compound [Fe].[Fe].[Mo] DSMZRNNAYQIMOM-UHFFFAOYSA-N 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
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 230000003647 oxidation Effects 0.000 description 2
- 238000007254 oxidation reaction Methods 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
- 238000005516 engineering process Methods 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 239000000203 mixture Substances 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
Images
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 the flue gas circulation process in Formaldehyde Production and device.
Background technology
Current more than 90% formaldehyde obtains from methanol oxidation, also has from hydro carbons direct oxidation or dme and is oxidized to produce.Method taking methyl alcohol as raw material production formaldehyde, is divided into " silver-colored method " and " iron molybdenum method ".Compared with iron molybdenum method, silver-colored method less investment, technical process is simple.And iron molybdenum method flow process complexity, investment large, consume energy high and product formic acid content is high.Therefore, most domestic formaldehyde plant adopts silver-colored method.Domestic silver-colored legal system formaldehyde, in the history of nearly 20 years, experience the progress to catalyst for electrolytic silver by float stone silver catalyst, experience the progress that waste heat boiler and tail gas boiler grow out of nothing, experienced the progress of horizontalboiler to vertical boilers, experienced vaporizer by steam heating to the progress by hot water or the heating of hot formaldehyde.Conventional formaldehyde production equipment at present, its final tail gas producing is directly disposed to atmosphere, causes vent gas to recycle, and the consumption of feed proportioning steam is increased greatly.
Summary of the invention
The technical problem to be solved in the present invention is: in order to solve the shortcoming and deficiency of above-mentioned existence, provide a kind of flue gas circulation process and device.
The technical solution adopted for the present invention to solve the technical problems is: a kind of flue gas recirculation technique
A, methyl alcohol, oxygen, batching steam, stack gas are mixed fully, then react and 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 producing after b, burning is for system self, and after burning, a discharge gas part for generation washes to remove solid particulate, and all the other discharge gas are directly emptying;
Discharge gas after c, washing carries out gas-liquid separation, and the gas after separation uses as stack gas.
A kind of formaldehyde production equipment, comprise mixing tank and stack gas circulating device, stack gas circulating device has the water wash column of 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 air outlet place of gas-liquid separator is provided with gas is sent into the gas pipeline in mixing tank on formaldehyde equipment, is connected with recycle blower on gas pipeline.For formaldehyde production equipment provides stack gas, reduce the consumption of batching steam by circulation device, improve output.
Further, the recycle blower air outlet side on described gas pipeline is also provided with preheater
The invention has the beneficial effects as follows, flue gas circulation process of the present invention and device, reduce methyl alcohol unit consumption, improve processing safety, and output is large, concentration of formaldehyde is high.
Brief description of the drawings
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is structural representation of the present invention.
In figure 1, water wash column, 2, gas-liquid separator, 3, gas pipeline, 4, recycle blower, 5, preheater.
Embodiment
In conjunction with the accompanying drawings, the present invention is further detailed explanation.These accompanying drawings are the schematic diagram of simplification, and basic structure of the present invention is only described in a schematic way, and therefore it only shows the formation relevant with the present invention.
Flue gas recirculation technique
A, methyl alcohol, oxygen, batching steam, stack gas are mixed fully, then react and 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 producing after b, burning is for system self, and after burning, a discharge gas part for generation washes to remove solid particulate, and all the other discharge gas are directly emptying;
Discharge gas after c, washing carries out gas-liquid separation, and the gas after separation uses as stack gas.
The stack gas circulating device of preferred forms as shown in Figure 1, for formaldehyde production equipment, there is 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, the air outlet place of gas-liquid separator 2 is provided with gas is sent into the gas pipeline 3 in mixing tank on formaldehyde equipment, on gas pipeline 3, be connected with recycle blower 4, recycle blower 4 air outlet sides on gas pipeline 3 are also provided with preheater 5.
Methyl alcohol, airborne oxygen, enter in oxidizer after mixing in the mixing tank of formaldehyde equipment from the batching steam of formaldehyde device systems and stack gas and react, the gas mixture that contains formaldehyde after reaction enters absorption tower and absorbs, the nonabsorbable tail gas that after absorbing, top of tower produces is delivered to exhaust gas processing device and is burned recovery heat, for generation of steam, and the discharge gas part producing after burning enters water wash column 1, all the other directly discharge atmosphere.The discharge gas entering in water wash column 1 is removed solid particulate as dust, purify the gas in it, due in the interior effluent air of water wash column 1 with liquid, so discharge gas enters gas after gas-liquid separator 2 separates and enters gas pipeline 3 and use as stack gas after water wash column 1, by the recycle blower 4 being connected on pipeline, stack gas is blasted in preheater 5, the stack gas after preheating directly enters in mixing tank and uses.The effect of stack gas is similar with batching steam, can remove reaction heat, increases stack gas and can reduce batching steam consumption in mixing tank.
Taking above-mentioned foundation desirable embodiment of the present invention as enlightenment, by above-mentioned description, relevant staff can, not departing from the scope of this invention technological thought, carry out various change and amendment completely.The technical scope of this invention is not limited to the content on specification sheets, must determine its technical scope according to claim scope.
Claims (1)
1. a flue gas recirculation technique, is characterized in that: technological process is as follows
A, methyl alcohol, oxygen, batching steam, stack gas are mixed fully, then react and 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 producing after b, burning is for system self, and after burning, a discharge gas part for generation washes to remove solid particulate, and all the other discharge gas are directly emptying;
Discharge gas after c, washing carries out gas-liquid separation, and the gas after separation uses as stack gas.
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 |
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| Publication Number | Publication Date |
|---|---|
| CN102372616A CN102372616A (en) | 2012-03-14 |
| CN102372616B true CN102372616B (en) | 2014-06-18 |
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| 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 |
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Families Citing this family (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 (4)
| 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》.1986,第17-22页. |
| 尾气循环银法甲醛生产工艺;薛琪;《精细与专用化学品》;20050206;第13卷(第3/4期);第14-16，25页 * |
| 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;宋界新;《广东化工》;19861001;第17-22页 * |
| 薛琪.尾气循环银法甲醛生产工艺.《精细与专用化学品》.2005,第13卷(第3/4期),第14-16，25页. |
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| CN102372616A (en) | 2012-03-14 |
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