CN211836401U - Crude benzene cooling reflux device - Google Patents
Crude benzene cooling reflux device Download PDFInfo
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- CN211836401U CN211836401U CN202020376750.XU CN202020376750U CN211836401U CN 211836401 U CN211836401 U CN 211836401U CN 202020376750 U CN202020376750 U CN 202020376750U CN 211836401 U CN211836401 U CN 211836401U
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- crude benzene
- benzene
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Abstract
The utility model discloses a crude benzol cooling reflux device, including debenzolization tower, crude benzol condensation cooler, crude benzol water oil separator, crude benzol reflux groove, backwash pump, finished product groove. The utility model has simple structure and convenient operation; the temperature of the cooled crude benzene is reduced to below 30 ℃ from about 55 ℃, the temperature of the crude benzene in the crude benzene reflux tank is low, the volatilization of the crude benzene is avoided, and the potential safety hazard of the crude benzene production is eliminated; the reduction of the temperature of the crude benzene further reduces the reflux quantity of the crude benzene, prolongs the service life of a reflux pump and reduces energy consumption.
Description
Technical Field
The utility model relates to a coal coking crude benzol production technical field especially relates to a crude benzol cooling reflux unit.
Background
Coking of coal is also known as high temperature dry distillation of coal. The coal is used as raw material, heated to about 950 ℃ under the condition of air isolation, and subjected to high-temperature dry distillation to produce coke, and simultaneously raw coke gas is obtained and other chemical products are recovered. The raw gas is sprayed with ammonia water to reduce the temperature and then separated out coal tar in a mechanized ammonia water clarifying tank, then desulfurization is carried out to produce sulfur, deamination is carried out to produce ammonium sulfate, and then washing and debenzolization are carried out to produce crude benzene and coke oven gas, wherein the coke oven gas can be synthesized into chemical raw materials, power generation and clean fuels, etc.
The benzene washing and removing are important links in the coking gas purification process. The coal gas is sprayed with washing oil through a benzene washing tower to wash benzene, and the washing oil after benzene washing absorbs the benzene hydrocarbon in the coal gas to become rich oil. The rich oil is debenzolized by a debenzolization tower to become lean oil. The lean oil is returned to the benzene washing tower for recycling.
In the rich oil debenzolization process, benzene vapor (with the temperature of 105 ℃) from the top of the debenzolization tower enters a crude benzene condensation cooler and a cooler, then passes through an oil-water separator and a reflux tank, and returns to the top of the debenzolization tower under the action of a reflux pump. But the temperature of the cooled crude benzene is 55-60 ℃, the temperature control difficulty of the crude benzene refluxed to the top of the debenzolization tower is large, the reflux quantity is increased, the power consumption and the spare part consumption of a reflux pump are increased, and the service life of the reflux pump is reduced; and the crude benzene in the finished product tank is seriously volatilized, so that the product loss is high, the volatilization concentration is high, the poison is easy to prepare, the combustion and the explosion are easy, and the great potential safety hazard is caused.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an aim at just overcoming current technology technical problem, providing a crude benzol cooling reflux device for this reason, establish ties a crude benzol cooler behind the crude benzol condensation cooler of crude benzol, solve the high technological problem of crude benzol reflux temperature.
In order to achieve the purpose, the utility model is implemented according to the following technical scheme:
a crude benzene cooling reflux device comprises a debenzolization tower, a crude benzene condensation cooler, a crude benzene oil-water separator, a crude benzene reflux tank, a reflux pump and a finished product tank;
a benzene steam outlet of the debenzolization tower is communicated with a benzene steam pipeline, and the benzene steam pipeline is sequentially connected with a crude benzene condensation cooler, a crude benzene oil-water separator and a crude benzene reflux groove; the crude benzene reflux tank is provided with a first outlet and a second outlet; the first outlet is communicated with the reflux pump through a pipeline, and the second outlet is communicated with the finished product tank; the outlet of the reflux pump is communicated with the debenzolization tower through a pipeline.
Preferably, a refrigerating water inlet pipe is connected outside a refrigerating water inlet of the crude benzene cooler; the refrigerating water outlet of the crude benzene cooler is externally connected with a refrigerating water discharging pipe.
Preferably, the crude benzene cooler is a stainless steel tubular heat exchanger.
The utility model discloses an action principle:
in the prior art, a crude benzene condensation cooler is used as a device for cooling benzene vapor, and the specific structure of the crude benzene condensation cooler comprises an upper section of condensation cooler and a lower section of cooler. Benzene steam enters a crude benzene condensation cooler, and is condensed and cooled into crude benzene by the upper section of condensation cooler and then cooled by the lower section of cooler. However, the crude benzene condensing cooler in the prior art still has insufficient cooling function, so that the temperature of the crude benzene discharged from the crude benzene condensing cooler is too high, and a series of problems are caused.
When the utility model is used, benzene vapor (with a temperature of 105 ℃) coming out from the top of the debenzolization tower enters the crude benzene condensation cooler to be cooled for the first time (with a temperature of 55-60 ℃) and enters the crude benzene cooler again to be cooled for the second time, so that the temperature is reduced to 25-26 ℃; after cooling, the water flows into a crude benzene oil-water separator to separate water, and flows into a crude benzene reflux tank automatically; one part is sent to the top of the debenzolization tower as reflux under the action of a reflux pump; and (4) allowing the redundant crude benzene to flow into a finished product tank, and periodically conveying the finished product tank to an oil depot for loading and export.
The utility model discloses a stainless steel shell and tube heat exchanger is selected to crude benzene cooler, lets in refrigeration water and cools off crude benzene in to stainless steel shell and tube heat exchanger.
The utility model discloses following beneficial effect has been reached:
the utility model has simple structure and convenient operation; the temperature of the cooled crude benzene is reduced to below 30 ℃ from about 60 ℃, the temperature of the crude benzene in the crude benzene reflux tank is low, the volatilization of the crude benzene is avoided, and the potential safety hazard of the crude benzene production is eliminated; the reduction of the temperature of the crude benzene further reduces the reflux quantity of the crude benzene, prolongs the service life of a reflux pump and reduces energy consumption.
Drawings
Fig. 1 is a flow chart of the present invention.
In the figure: 1. a debenzolization tower; 2. a crude benzene condensing cooler; 3. a crude benzene cooler; 4. a crude benzene oil-water separator; 5. a crude benzene reflux tank; 6. a reflux pump; 7. a finished product groove; 8. a refrigerating water inlet pipe; 9. a refrigeration water discharge pipe; 10. a benzene vapor line.
Detailed Description
The invention will be further described with reference to the drawings and specific embodiments, illustrative embodiments and description of which are provided herein to explain the invention, but not as a limitation thereof.
As shown in figure 1, the crude benzene cooling reflux device comprises a debenzolization tower 1, a crude benzene condensation cooler 2, a crude benzene cooler 3, a crude benzene oil-water separator 4, a crude benzene reflux tank 5, a reflux pump 6 and a finished product tank 7.
A benzene steam outlet of the debenzolization tower 1 is communicated with a benzene steam pipeline 10, and the benzene steam pipeline 10 is sequentially connected with a crude benzene condensation cooler 2, a crude benzene cooler 3, a crude benzene oil-water separator 4 and a crude benzene reflux tank 5; the crude benzene reflux tank 5 is provided with a first outlet and a second outlet; the first outlet is communicated with a reflux pump 6 through a pipeline, and the second outlet is communicated with a finished product tank 7; the outlet of the reflux pump 6 is communicated with the debenzolization tower 1 through a pipeline.
A refrigerating water inlet 8 is connected outside a refrigerating water inlet of the crude benzene cooler 3; a refrigerating water discharging pipe 9 is connected outside the refrigerating water outlet of the crude benzene cooler 3. The crude benzene cooler 3 is a stainless steel tubular heat exchanger.
The technical scheme of the utility model is not limited to the restriction of above-mentioned specific embodiment, all according to the utility model discloses a technical scheme makes technical deformation, all falls into within the protection scope of the utility model.
Claims (3)
1. The utility model provides a crude benzene cooling reflux unit, cooling reflux unit includes the debenzolization tower which characterized in that: the system also comprises a crude benzene condensation cooler, a crude benzene oil-water separator, a crude benzene reflux tank, a reflux pump and a finished product tank;
a benzene steam outlet of the debenzolization tower is communicated with a benzene steam pipeline, and the benzene steam pipeline is sequentially connected with a crude benzene condensation cooler, a crude benzene oil-water separator and a crude benzene reflux groove; the crude benzene reflux tank is provided with a first outlet and a second outlet; the first outlet is communicated with the reflux pump through a pipeline, and the second outlet is communicated with the finished product tank; the outlet of the reflux pump is communicated with the debenzolization tower through a pipeline.
2. The crude benzene cooling reflux apparatus as set forth in claim 1, wherein: a refrigerating water inlet pipe is connected outside a refrigerating water inlet of the crude benzene cooler; the refrigerating water outlet of the crude benzene cooler is externally connected with a refrigerating water discharging pipe.
3. The crude benzene cooling reflux apparatus as set forth in claim 2, wherein: the crude benzene cooler is a stainless steel tubular heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020376750.XU CN211836401U (en) | 2020-03-23 | 2020-03-23 | Crude benzene cooling reflux device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020376750.XU CN211836401U (en) | 2020-03-23 | 2020-03-23 | Crude benzene cooling reflux device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211836401U true CN211836401U (en) | 2020-11-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020376750.XU Active CN211836401U (en) | 2020-03-23 | 2020-03-23 | Crude benzene cooling reflux device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211836401U (en) |
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2020
- 2020-03-23 CN CN202020376750.XU patent/CN211836401U/en active Active
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