CN202359053U - Device for reducing benzene consumption in polyformaldehyde production process - Google Patents
Device for reducing benzene consumption in polyformaldehyde production process Download PDFInfo
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- CN202359053U CN202359053U CN2011204286832U CN201120428683U CN202359053U CN 202359053 U CN202359053 U CN 202359053U CN 2011204286832 U CN2011204286832 U CN 2011204286832U CN 201120428683 U CN201120428683 U CN 201120428683U CN 202359053 U CN202359053 U CN 202359053U
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- benzene
- gas
- pipeline
- cooler
- production process
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Abstract
The utility model discloses a device for reducing benzene consumption in a polyformaldehyde production process. The device comprises a gas phase balance line connected between a cooler of a low-boiler tower and a receiver, wherein the gas phase balance line is communicated with a benzene gas water seal box through a gas phase pipeline; a gas outlet at the top of the benzene gas water seal box is communicated with the inlet of a waste gas washing tower through a gas pipeline; an outlet at the top of the waste gas washing tower is connected with the cooler through a pipeline; the gas outlet of the cooler is connected with a pipeline communicated with a torch; and the opening of a valve on the gas phase balance line is adjusted to be 1/3-1/2. The device provided by the utility model has the following beneficial effects: the benzene consumption can be effectively reduced; the production cost is reduced; and the environmental pollution is reduced.
Description
Technical field
The utility model relates to a kind of device that benzene consumes that reduces, and relates in particular to reduce the device that benzene consumes in the polyoxymethylene production process.
Background technology
In the production process of polyoxymethylene device, benzene is not participated in reaction as extraction agent, recycles.
Because water and trioxymethylene can form azeotropic, can't the two be separated with the method for simple rectifying, so adopt the benzene extraction agent earlier trioxymethylene to be extracted, separate trioxymethylene and benzene extraction liquid with the distillation mode then in the aqueous solution.This device selects for use benzene as extraction agent, its major cause be the avidity of benzene and trioxymethylene greater than water, and the proportion of benzene is little, be prone to and water sepn.
Traditional technology as shown in Figure 1 is: the aqueous sodium hydroxide solution of sending here from trioxymethylene liquid concentrator and trioxymethylene, the trench bottom discharging of benzene water sepn and the NaOH discharging pump of trioxymethylene regenerating column of upgrading tower mixes the laggard static mixing tank of going into, and control PH=8.0 gets into trioxymethylene extraction tower 1 top.Extraction agent benzene gets into the extraction tower bottom from benzene storage tank 2 through pump, extracts.After containing the benzene liquid entering benzene and trioxymethylene storage tank 3 of trioxymethylene after the extraction, give tower 4 chargings of gently boiling through this storage tank discharging pump.The benzene vapour of the column overhead of gently boiling after the quenching of de-mineralized water hydro-peening, gets into condensing surface 5 condensations cooling earlier then, flows into groove 6 again.To groove, do not form two layers because of benzene and water do not dissolve each other: upper strata benzene liquid is got a part by pump and is done 4 backflow, and another part is beaten to the circulation pan feeding of benzene storage tank 2 as benzene extraction liquid.Be connected with the gas-liquid equilibrium line between tower cooler device and the groove gently boiling; Described gas-liquid equilibrium line and benzene air water joint sealing 7 are connected through the gas phase pipeline; What get into benzene air water joint sealing contains benzene gas after the de-salted water spray absorbs; The gas at benzene air water joint sealing top enters into exhaust gas washing tower 8 and washs recovery again, and the waste gas after the washing is delivered to flare system.Benzene should be in the gas composition of exhaust gas washing tower 8 dischargings: C
6H
6: 0.003%, designing and arranging high-volume is 172.9NM
3/ H, promptly the reasonable consumption of benzene is 40 tons/year.Can't reach this theoretical value according to existing processes at present.And in being transported to the process of flare system, the explosion incident took place.
Summary of the invention
The purpose of the utility model is to overcome the deficiency of prior art, and a kind of consumption that can effectively reduce benzene is provided, and reduces production costs, and reduces the device that benzene consumes in a kind of polyoxymethylene production process of minimizing environmental pollution.
Reduce the device that benzene consumes in a kind of polyoxymethylene production process of the utility model; It comprises and is connected the gas-liquid equilibrium line that gently boils between tower cooler device and the groove; Described gas-liquid equilibrium line is connected through the gas phase pipeline with benzene air water joint sealing; The pneumatic outlet at described benzene air water joint sealing top is connected with the exhaust gas washing tower import through gas tube; The top exit of described exhaust gas washing tower links to each other with water cooler through pipeline, and the pneumatic outlet of described water cooler links to each other with the pipeline that leads to torch, and the aperture of the valve on the described gas-liquid equilibrium line is adjusted into 1/3-1/2.
The beneficial effect of the utility model device is: effectively reduce the consumption of benzene, reduce production costs, reduce environmental pollution.
Description of drawings
Fig. 1 is a benzene retrieving arrangement synoptic diagram in the traditional polyoxymethylene production process;
Fig. 2 reduces the device synoptic diagram that benzene consumes in a kind of polyoxymethylene production process of the utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model is further described.
Reduce the device that benzene consumes in a kind of polyoxymethylene production process of the utility model as shown in Figure 2; It comprises and is connected the gas-liquid equilibrium line that gently boils between tower cooler device 5 and the groove 6; Described gas-liquid equilibrium line and benzene air water joint sealing 7 are connected through the gas phase pipeline; The pneumatic outlet at described benzene air water joint sealing top is connected with the exhaust gas washing tower import through gas tube; The top exit of described exhaust gas washing tower links to each other with water cooler 9 through pipeline, and the pneumatic outlet of described water cooler links to each other with the pipeline that leads to torch, and the aperture of the valve on the described gas-liquid equilibrium line is adjusted into 1/3-1/2.
Adopt this device through detecting: benzene content meets the requirement that is transported to flare system in the waste gas after reclaiming benzene.
Claims (1)
1. reduce the device that benzene consumes in a polyoxymethylene production process; It is characterized in that: it comprises and is connected the gas-liquid equilibrium line that gently boils between tower cooler device and the groove; Described gas-liquid equilibrium line is connected through the gas phase pipeline with benzene air water joint sealing; The pneumatic outlet at described benzene air water joint sealing top is connected with the exhaust gas washing tower import through gas tube; The top exit of described exhaust gas washing tower links to each other with water cooler through pipeline, and the pneumatic outlet of described water cooler links to each other with the pipeline that leads to torch, and the aperture of the valve on the described gas-liquid equilibrium line is adjusted into 1/3-1/2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204286832U CN202359053U (en) | 2011-11-02 | 2011-11-02 | Device for reducing benzene consumption in polyformaldehyde production process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204286832U CN202359053U (en) | 2011-11-02 | 2011-11-02 | Device for reducing benzene consumption in polyformaldehyde production process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202359053U true CN202359053U (en) | 2012-08-01 |
Family
ID=46570256
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204286832U Expired - Lifetime CN202359053U (en) | 2011-11-02 | 2011-11-02 | Device for reducing benzene consumption in polyformaldehyde production process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202359053U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107382955A (en) * | 2017-08-24 | 2017-11-24 | 开封龙宇化工有限公司 | A kind of benzene recovery device for steam in metaformaldehyde production process |
-
2011
- 2011-11-02 CN CN2011204286832U patent/CN202359053U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107382955A (en) * | 2017-08-24 | 2017-11-24 | 开封龙宇化工有限公司 | A kind of benzene recovery device for steam in metaformaldehyde production process |
| CN107382955B (en) * | 2017-08-24 | 2023-06-16 | 开封龙宇化工有限公司 | Benzene vapour recovery unit in trioxymethylene production 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: 20120801 |
|
| CX01 | Expiry of patent term |