CN203264540U - Destruction device containing phosgene tail gas - Google Patents
Destruction device containing phosgene tail gas Download PDFInfo
- Publication number
- CN203264540U CN203264540U CN 201320270248 CN201320270248U CN203264540U CN 203264540 U CN203264540 U CN 203264540U CN 201320270248 CN201320270248 CN 201320270248 CN 201320270248 U CN201320270248 U CN 201320270248U CN 203264540 U CN203264540 U CN 203264540U
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- Prior art keywords
- tail gas
- phosgene
- tower
- processing unit
- catalytic decomposition
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Abstract
The utility model relates to a destruction device containing phosgene tail gas, and belongs to the technical field of chemical devices. The destruction device mainly consists of a tail gas buffer tank, a flow distribution station and a plurality of phosgene processing units, wherein tail gas in the tail gas buffer tank is distributed to the phosgene processing units through the flow distribution station; the phosgene processing unit comprises a falling-film absorption tower, a catalytic decomposition tower, a plurality of acid washing towers and a plurality of alkaline washing towers which are connected in sequence; each phosgene processing unit is further provided with a water tank; the waster tank is respectively connected with the falling-film absorption tower, the catalytic decomposition tower and the acid washing towers. Flow distribution is performed on the tail gas containing phosgene through the flow distribution station, the intensive degree is high, the utilization ratio of signal phosgene processing device is greatly improved, no waste water is generated during the whole process, byproduct dilute hydrochloric acid can be produced, the consumption of alkali liquor is reduced, and the running cost of the device is greatly reduced.
Description
Technical field
The utility model belongs to the chemical plant installations technical field, is specifically related to a kind of device that the tail gas that contains phosgene is processed.
Background technology
phosgene, have another name called oxychlorination carbon, phosgene or chloro formyl chloride, a kind of colourless or slightly yellow gas, be slightly soluble in water and hydrolysis gradually, be dissolved in aromatic hydrocarbons, carbon tetrachloride, the organic solvents such as chloroform, phosgene is a kind of important organic intermediate, be widely used in agricultural chemicals, medicine, in chemical industry and military field, but phosgene is a kind of toxic gas, human body there is great harm, use the producer of phosgene to carry out harmless treatment to the tail gas that contains phosgene, but the treating apparatus of present phosgene tail gas is mainly by tail gas buffer, catalytic decomposition tower and caustic wash tower form, but present phosgene treating apparatus intensive degree is low, utilization ratio of device is low, can produce a large amount of waste water simultaneously, the alkali lye consumption is also large, cause the operating cost for the treatment of apparatus higher.
The utility model content
The utility model provides a kind of breaking plant that contains phosgene tail gas, the problem that intensive degree is low, utilization ratio of device is low, wastewater flow rate is large and the alkali lye consumption is large that exists to solve prior art.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of breaking plant that contains phosgene tail gas, mainly formed by tail gas buffer, assignment of traffic station and several phosgene processing units, the tail gas of tail gas buffer is distributed to the phosgene processing unit by the assignment of traffic station, the phosgene processing unit comprises film-falling absorption tower, catalytic decomposition tower, several wash acid tower and caustic wash tower is connected in sequence, the phosgene processing unit also is provided with tank, and tank is respectively with film-falling absorption tower, catalytic decomposition tower with wash acid tower and be connected.
Above-mentioned catalytic decomposition tower adopts the SN7501 phosgene catalyst.
The alkali lye that above-mentioned caustic wash tower uses is sodium hydrate aqueous solution.
the operation principle of the utility model device is that the tail gas of tail gas buffer is distributed to the phosgene processing unit by the assignment of traffic station, tail gas is introduced in film-falling absorption tower, contact absorption with the water that comes the Autocatalytic decomposition tower, then tail gas enters in the catalytic decomposition tower again, phosgene in tail gas contacts under the effect of SN7501 phosgene catalyst with water from tank and decomposes generation hydrochloric acid, then tail gas enters and washes acid tower, water from tank in washing acid tower washs tail gas, obtain selling outside watery hydrochloric acid at the bottom of washing the acid tower tower, tail gas after washing enters caustic wash tower again and by alkali liquid washing, the acid that contains in tail gas is neutralized, then tail gas is risen empty discharging at caustic wash tower, alkali lye recycling in caustic wash tower.
Compared with prior art, the beneficial effects of the utility model are:
The tail gas that contains phosgene is carried out assignment of traffic by the assignment of traffic station, and intensive degree is high, has greatly improved the utilization rate of single phosgene treating apparatus, whole process does not produce waste water, also but by-product watery hydrochloric acid, reduced the alkali lye consumption, greatly reduces the operating cost of device.
Description of drawings
Below in conjunction with drawings and Examples, the utility model is further illustrated.
Fig. 1 is structural representation of the present utility model;
Fig. 2 is the structural representation of the utility model phosgene processing unit.
1 tail gas buffer in figure, 2 assignment of traffic stations, 3 phosgene processing units, 31 film-falling absorption towers, 32 catalytic decomposition towers, 33 are once washed acid tower, 34 secondaries are washed acid tower, 35 caustic wash towers, 36 tanks.
The specific embodiment
a kind of breaking plant that contains phosgene tail gas, mainly by tail gas buffer 1, assignment of traffic station 2 and several phosgene processing units 3 form, the tail gas of tail gas buffer 1 is distributed to phosgene processing unit 3 by assignment of traffic station 2, phosgene processing unit 3 comprises film-falling absorption tower 31, catalytic decomposition tower 32, once wash acid tower 33, secondary washes acid tower 34 and caustic wash tower 35 is connected in sequence, phosgene processing unit 3 also is provided with tank 36, tank 36 respectively with film-falling absorption tower 31, catalytic decomposition tower 32, once washing acid tower 33 washes acid tower 34 with secondary and is connected, catalytic decomposition tower 32 adopts the SN7501 phosgene catalyst, the alkali lye that caustic wash tower uses is 32% sodium hydrate aqueous solution.
the operation principle of the utility model device is that the tail gas of tail gas buffer 1 is distributed to phosgene processing unit 3 by assignment of traffic station 2, tail gas is introduced in film-falling absorption tower 31, contact absorption with the water that comes Autocatalytic decomposition tower 32, then tail gas enters in catalytic decomposition tower 32 again, phosgene in tail gas contacts under the effect of SN7501 phosgene catalyst with water from tank 36 and decomposes generation hydrochloric acid, then tail gas enters and once washes acid tower 33 and secondary is washed acid tower 34, water from tank 36 in washing acid tower washs tail gas, at the bottom of washing acid tower 34 towers, acid tower 33 and secondary obtain selling outside watery hydrochloric acid once washing, tail gas after washing enters caustic wash tower 35 again and by alkali liquid washing, the acid that contains in tail gas is neutralized, then tail gas is risen empty discharging at caustic wash tower 35, alkali lye recycling in caustic wash tower 35.
Claims (3)
1. breaking plant that contains phosgene tail gas, it is characterized in that mainly being formed by tail gas buffer, assignment of traffic station and several phosgene processing units, the tail gas of tail gas buffer is distributed to the phosgene processing unit by the assignment of traffic station, the phosgene processing unit comprises film-falling absorption tower, catalytic decomposition tower, several wash acid tower and caustic wash tower is connected in sequence, the phosgene processing unit also is provided with tank, and tank is respectively with film-falling absorption tower, catalytic decomposition tower with wash acid tower and be connected.
2. the breaking plant that contains phosgene tail gas according to claim 1, is characterized in that the catalytic decomposition tower adopts the SN7501 phosgene catalyst.
3. the breaking plant that contains phosgene tail gas according to claim 1, is characterized in that the alkali lye that caustic wash tower uses is sodium hydrate aqueous solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320270248 CN203264540U (en) | 2013-05-17 | 2013-05-17 | Destruction device containing phosgene tail gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320270248 CN203264540U (en) | 2013-05-17 | 2013-05-17 | Destruction device containing phosgene tail gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203264540U true CN203264540U (en) | 2013-11-06 |
Family
ID=49495035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320270248 Expired - Lifetime CN203264540U (en) | 2013-05-17 | 2013-05-17 | Destruction device containing phosgene tail gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203264540U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104492239A (en) * | 2014-11-25 | 2015-04-08 | 中国海洋石油总公司 | CO2, CL2 , phosgene and other toxic gas-containing tail gas treatment process and device |
| CN105327606A (en) * | 2015-10-20 | 2016-02-17 | 安徽广信农化股份有限公司 | Processing method for octadecanoyl chloride tail gas |
| CN110743308A (en) * | 2019-11-07 | 2020-02-04 | 海利贵溪化工农药有限公司 | Treatment process of waste gas in pesticide first-aid production |
| CN111991998A (en) * | 2020-08-27 | 2020-11-27 | 万华化学集团股份有限公司 | Method for treating tail gas in isocyanate preparation process |
-
2013
- 2013-05-17 CN CN 201320270248 patent/CN203264540U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104492239A (en) * | 2014-11-25 | 2015-04-08 | 中国海洋石油总公司 | CO2, CL2 , phosgene and other toxic gas-containing tail gas treatment process and device |
| CN105327606A (en) * | 2015-10-20 | 2016-02-17 | 安徽广信农化股份有限公司 | Processing method for octadecanoyl chloride tail gas |
| CN110743308A (en) * | 2019-11-07 | 2020-02-04 | 海利贵溪化工农药有限公司 | Treatment process of waste gas in pesticide first-aid production |
| CN111991998A (en) * | 2020-08-27 | 2020-11-27 | 万华化学集团股份有限公司 | Method for treating tail gas in isocyanate preparation process |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131106 |
|
| CX01 | Expiry of patent term |