CN102357310A - Waste gas processing method - Google Patents
Waste gas processing method Download PDFInfo
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- CN102357310A CN102357310A CN2011103203803A CN201110320380A CN102357310A CN 102357310 A CN102357310 A CN 102357310A CN 2011103203803 A CN2011103203803 A CN 2011103203803A CN 201110320380 A CN201110320380 A CN 201110320380A CN 102357310 A CN102357310 A CN 102357310A
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Abstract
The invention discloses a waste gas processing method, which includes introducing waste gas containing cumin and hydrogen peroxide cumin into a cooling device, cooling the waste gas to enable the temperature of the gas to be in a range from 35 DEG C to 45 DEG C and form gas liquid mixing liquid, enabling the gas liquid mixing liquid to pass through a first-level gas liquid separation tank to achieve the fact that waste gas is reserved on the upper portion in the first-level gas liquid separation tank after separation, introducing the waste gas on the upper portion in the cooling device, cooling the waste gas into the temperature between 2 DEG C to 8 DEG C to form gas liquid mixture, enabling the gas liquid mixture to pass through a second-level gas liquid separation tank to achieve the fact that the waste gas is located on the upper portion in the second-level gas liquid separation tank after separation, heating the waste gas on the upper potion to be in a temperature range from 10 DEG C to 20 DEG C, discharging the waste gas to a waste gas processing tower, absorbing the waste gas in the waste gas processing tower through a water curtain and discharging the waste gas. The waste gas processing method is simple in process and low in energy consumption. Only a small amount of power energy needs to be consumed. Content of cumin of processed waste gas is smaller than and equal to 0.5%, content of hydrogen peroxide cumin of processed waste gas is smaller than and equal to 0.5%, and no secondary pollution is caused.
Description
Technical field
The present invention relates to the exhaust-gas treatment field, relate in particular to the waste gas processing method that a kind of oxidation isopropylbenzene is produced hydrogen phosphide cumene.
Background technology
Is that hydrogen phosphide cumene is produced in oxidation under 80～95 ℃ of conditions with isopropylbenzene in temperature, contains pernicious gases such as isopropylbenzene and hydrogen phosphide cumene in the reactor off-gas, isopropylbenzene content >=7% wherein, hydrogen phosphide cumene content >=4%.In the prior art, adopt method in line or that burn to remove usually,, can produce seriously polluted atmosphere pollution if adopt in line processing method; If adopt the treating method of burning, though hydrogen phosphide cumene can basically all be handled in the waste gas, energy resource consumption is very big, and complex process, and can cause secondary pollution.
Summary of the invention
In order to overcome above-mentioned deficiency, technical problem to be solved provides the waste gas processing method that a kind of technology is simple, energy resource consumption is low just in the present invention.
For solving the problems of the technologies described above, the technical scheme that the present invention adopted is following:
A kind of waste gas processing method, it comprises the steps:
The waste gas that 1, will contain isopropylbenzene and hydrogen phosphide cumene feeds cooling device and is cooled to 35～45 ℃ and is gas and liquid mixture;
2, this gas and liquid mixture is separated through first order knockout drum, the top of separating back first order knockout drum is waste gas, and the bottom is the mixed liquor of isopropylbenzene and hydrogen phosphide cumene, recycles;
3, the top waste gas of first order knockout drum being fed cooling device is cooled to 2～8 ℃ and is gas-liquid mixture; This gas-liquid mixture is separated through second level knockout drum; The top of separating the second level, back knockout drum is waste gas; The bottom is the mixed liquor of isopropylbenzene and hydrogen phosphide cumene, recycles;
4, the top waste gas with second level knockout drum is warming up to 10～20 ℃, is disposed to exhaust gas treating tower;
5, in exhaust gas treating tower, adopt water curtain to absorb the back waste gas and discharge, wherein, isopropylbenzene content≤0.5%, hydrogen phosphide cumene content≤0.5%.
Wherein,
Cooling device described in the step 1 is cooling medium with water, and the temperature range of water is 25～35 ℃.
Cooling device described in the step 3 is cooling medium with ethylene glycol, and the temperature range of ethylene glycol is-5～-2 ℃.
Carry out the heat exchange cooling through heat exchanger before the top waste gas feeding cooling device with first order knockout drum described in the step 3, thus the energy recovery utilization.
The top waste gas of the knockout drum of the second level described in the step 4 is warming up to 10～20 ℃ through heat exchanger as refrigerant, and be beneficial to water curtain and absorb, and the energy recovery utilization.
The method that adopts water curtain to absorb in the step 5 is: use water pump with liquid circulated sprinkling in the tower.
Liquid is 1～2% sodium hydroxide solution in the tower of described circulated sprinkling.
Be provided with the multiple layer metal gauze packing in the tower of said exhaust gas treating tower.
Said metal net shaped filler whenever is provided with one deck at a distance from 4～5m, and every layer thickness is 200～250mm.
Beneficial effect: waste gas processing method technology of the present invention is simple, and energy resource consumption is low, only need consume a spot of electric power energy; Mark meter by volume in the waste gas after treatment; Isopropylbenzene content≤0.5%, hydrogen phosphide cumene content≤0.5%, and can not produce secondary pollution.
The specific embodiment
A kind of waste gas processing method, it comprises the steps:
It is that the cooling device of cooling medium is cooled to 35～45 ℃ and is gas and liquid mixture that the waste gas that 1, will contain isopropylbenzene and hydrogen phosphide cumene feeds with water;
2, this gas and liquid mixture is separated through first order knockout drum, the top of separating back first order knockout drum is waste gas, and the bottom is the mixed liquor of isopropylbenzene and hydrogen phosphide cumene, recycles;
3, the top waste gas with first order knockout drum carries out the heat exchange cooling through heat exchanger; Feed then with ethylene glycol is that the cooling device of cooling medium is cooled to 2～8 ℃ and is gas-liquid mixture; This gas-liquid mixture is separated through second level knockout drum; The top of separating the second level, back knockout drum is waste gas, and the bottom is the mixed liquor of isopropylbenzene and hydrogen phosphide cumene, recycles;
4, with the top waste gas of second level knockout drum cooling medium,, be warming up to 10～20 ℃, be disposed to exhaust gas treating tower then through heat exchanger as heat exchanger;
5, waste gas is used the sodium hydroxide solution circulated sprinkling of water pump with liquid in the tower 1～2% in exhaust gas treating tower; The time of staying is 1～5min; Discharge then, wherein, whenever be provided with the layer of metal gauze packing in the tower of exhaust gas treating tower at a distance from 4～5m; The thickness of every layer of gauze packing is 200～250mm, and the content of discharging isopropylbenzene in the gas is 0.3%, hydrogen phosphide cumene content is 0.2%.
Above-mentioned cooling device is cooling medium with water, and wherein the temperature range of water is 25～35 ℃; Above-mentioned cooling device is cooling medium with ethylene glycol, and wherein the temperature range of ethylene glycol is-5～-2 ℃.
Need to prove that above embodiment is only unrestricted in order to technical scheme of the present invention to be described.Although the present invention is specified with reference to preferred embodiment; Those of ordinary skill in the art is to be understood that; Can make amendment or be equal to replacement the technical scheme of invention, and not break away from the scope of technical scheme of the present invention, it all should be encompassed in the claim scope of the present invention.
Claims (10)
1. a waste gas processing method is characterized in that it comprises the steps:
The waste gas that (1) will contain isopropylbenzene and hydrogen phosphide cumene feeds cooling device and is cooled to 35～45 ℃ and is gas and liquid mixture;
(2) this gas and liquid mixture is separated through first order knockout drum, the top of separating back first order knockout drum is waste gas, and the bottom is the mixed liquor of isopropylbenzene and hydrogen phosphide cumene, recycles;
(3) the top waste gas of first order knockout drum being fed cooling device is cooled to 2～8 ℃ and is gas-liquid mixture; This gas-liquid mixture is separated through second level knockout drum; The top of separating the second level, back knockout drum is waste gas; The bottom is the mixed liquor of isopropylbenzene and hydrogen phosphide cumene, recycles;
(4) the top waste gas with second level knockout drum is warming up to 10～20 ℃, is disposed to exhaust gas treating tower;
(5) in exhaust gas treating tower, adopt water curtain to absorb the back waste gas and discharge, wherein, isopropylbenzene content≤0.5%, hydrogen phosphide cumene content≤0.5%.
2. waste gas processing method according to claim 1 is characterized in that: the cooling device described in the step (1) is cooling medium with water.
3. waste gas processing method according to claim 2 is characterized in that: the temperature range of said water is 25～35 ℃.
4. waste gas processing method according to claim 1 is characterized in that: the cooling device described in the step (3) is cooling medium with ethylene glycol.
5. waste gas processing method according to claim 4 is characterized in that: the temperature range of said ethylene glycol is-5～-2 ℃.
6. waste gas processing method according to claim 1 is characterized in that: carry out the heat exchange cooling through heat exchanger before the top waste gas feeding cooling device with first order knockout drum described in the step (3); The top waste gas of second level knockout drum described in the step (4) as refrigerant, is warming up to 10～20 ℃ through heat exchanger.
7. waste gas processing method according to claim 1 is characterized in that: the method that adopts water curtain to absorb in the step (5) is: use water pump with liquid circulated sprinkling in the tower.
8. waste gas processing method according to claim 7 is characterized in that: liquid is 1～2% sodium hydroxide solution in the tower of described circulated sprinkling.
9. waste gas processing method according to claim 1 is characterized in that: be provided with the multiple layer metal gauze packing in the tower of said exhaust gas treating tower.
10. waste gas processing method according to claim 9 is characterized in that: said metal net shaped filler whenever is provided with one deck at a distance from 4～5m, and every layer thickness is 200～250mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103203803A CN102357310A (en) | 2011-10-20 | 2011-10-20 | Waste gas processing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103203803A CN102357310A (en) | 2011-10-20 | 2011-10-20 | Waste gas processing method |
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| Publication Number | Publication Date |
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| CN102357310A true CN102357310A (en) | 2012-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011103203803A Pending CN102357310A (en) | 2011-10-20 | 2011-10-20 | Waste gas processing method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103252107A (en) * | 2013-04-18 | 2013-08-21 | 南京金凌石化工程设计有限公司 | Flare gas recycling method and device for high-boiling-point material with normal pressure boiling point being more than or equal to 80 DEG C |
| CN103372357A (en) * | 2012-04-23 | 2013-10-30 | 怀化市双阳林化有限公司 | Method and device for processing oxidized tail gas of anthraquinone process-based hydrogen peroxide production |
| CN107648939A (en) * | 2017-10-17 | 2018-02-02 | 太仓塑料助剂厂有限公司 | The waste gas recovering device of cumyl peroxide |
| CN110898619A (en) * | 2018-09-14 | 2020-03-24 | 萍乡市华填化工填料有限公司 | Coking waste gas treatment process and filler treatment tower |
| CN110898615A (en) * | 2018-09-14 | 2020-03-24 | 萍乡市华填化工填料有限公司 | Coking industrial waste gas treatment tower and treatment method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1173491A (en) * | 1996-06-27 | 1998-02-18 | 通用电气公司 | Cumene oxidation process |
| CN1238326A (en) * | 1998-05-14 | 1999-12-15 | 中国科学院大连化学物理研究所 | Process for preparing ethylbenzene and isopropylbenzene from low-concentration ethylene and propylene |
| CN1454113A (en) * | 2000-09-12 | 2003-11-05 | 通用电气公司 | Process for removing methanol from waste gas |
| CN101543684A (en) * | 2009-04-02 | 2009-09-30 | 中国石油化工股份有限公司 | Process for treating oxidized exhaust gas |
-
2011
- 2011-10-20 CN CN2011103203803A patent/CN102357310A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1173491A (en) * | 1996-06-27 | 1998-02-18 | 通用电气公司 | Cumene oxidation process |
| CN1238326A (en) * | 1998-05-14 | 1999-12-15 | 中国科学院大连化学物理研究所 | Process for preparing ethylbenzene and isopropylbenzene from low-concentration ethylene and propylene |
| CN1454113A (en) * | 2000-09-12 | 2003-11-05 | 通用电气公司 | Process for removing methanol from waste gas |
| CN101543684A (en) * | 2009-04-02 | 2009-09-30 | 中国石油化工股份有限公司 | Process for treating oxidized exhaust gas |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103372357A (en) * | 2012-04-23 | 2013-10-30 | 怀化市双阳林化有限公司 | Method and device for processing oxidized tail gas of anthraquinone process-based hydrogen peroxide production |
| CN103252107A (en) * | 2013-04-18 | 2013-08-21 | 南京金凌石化工程设计有限公司 | Flare gas recycling method and device for high-boiling-point material with normal pressure boiling point being more than or equal to 80 DEG C |
| CN103252107B (en) * | 2013-04-18 | 2015-11-18 | 南京金凌石化工程设计有限公司 | The high boiler material process for recovering torch gas of a kind of atmospheric boiling point >=80 DEG C and retracting device |
| CN107648939A (en) * | 2017-10-17 | 2018-02-02 | 太仓塑料助剂厂有限公司 | The waste gas recovering device of cumyl peroxide |
| CN110898619A (en) * | 2018-09-14 | 2020-03-24 | 萍乡市华填化工填料有限公司 | Coking waste gas treatment process and filler treatment tower |
| CN110898615A (en) * | 2018-09-14 | 2020-03-24 | 萍乡市华填化工填料有限公司 | Coking industrial waste gas treatment tower and treatment method |
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Application publication date: 20120222 |
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