CN210251293U - Benzene vapor recovery device for trioxymethylene processing - Google Patents
Benzene vapor recovery device for trioxymethylene processing Download PDFInfo
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- CN210251293U CN210251293U CN201921162314.6U CN201921162314U CN210251293U CN 210251293 U CN210251293 U CN 210251293U CN 201921162314 U CN201921162314 U CN 201921162314U CN 210251293 U CN210251293 U CN 210251293U
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- tank
- benzene
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- trioxymethylene
- distillation
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Abstract
The utility model provides a benzene vapour recovery unit for trioxymethylene processing, which relates to the technical field of polyformaldehyde processing, and comprises a heat pump system, wherein an evaporator in the heat pump system is arranged in a condensing tank, a condenser in the heat pump system is arranged in a heating tank, the top of a material storage tank containing benzene vapour is communicated with the middle part of the condensing tank, and the lower part of the condensing tank is communicated with the middle part of a layering tank; the distillation tank is divided into a distillation chamber at the upper part and a heating chamber at the lower part by a partition plate; the utility model discloses in, can separate comdenstion water, other organic solvents and high-purity benzene steam with the benzene vapour that generates in the trioxymethylene course of working, the recovery efficiency of benzene is high, and the unit consumption of saving benzene by a wide margin practices thrift the cost, moreover the utility model discloses in no longer extra consumption water resource etc. avoided the waste of resource, environmental protection more.
Description
Technical Field
The utility model relates to a polyformaldehyde processing technology field specifically is a benzene vapour recovery unit for trioxymethylene processing.
Background
Benzene is used as an important extracting agent in the production process of polyformaldehyde, and the unit consumption is always high due to the characteristic of volatility; in addition, the toxic and harmful physical characteristics of benzene pose a great threat to the personal safety of staff, and the recycling of benzene vapor is urgent.
Through search, Chinese patent with the publication number of CN207108886U discloses a benzene vapor recovery device in the production process of trioxymethylene, which comprises a material storage tank containing benzene vapor, wherein the top of the material storage tank containing benzene vapor is communicated with a benzene vapor recovery box, the benzene vapor recovery box is divided into an upper layer, a middle layer and a lower layer through an upper interlayer and a lower interlayer, the top of the material storage tank containing benzene vapor is communicated with the middle layer of the benzene vapor recovery box, and a desalted water storage tank is communicated with the middle layer of the benzene vapor recovery box; the upper layer of benzene vapour recovery case and exhaust gas recovery unit intercommunication, the lower floor of benzene vapour recovery case and the lower part intercommunication of benzene water separating tank, the bottom and the waste water recovery unit intercommunication of benzene water separating tank, the top of benzene water separating tank and the bottom intercommunication of the material storage tank that contains the benzene vapour.
However, in the technical scheme, a large amount of water resources are consumed in actual use, and although the cost can be saved by recycling benzene in the technical scheme, the cost is increased by using a large amount of water resources, so that the comprehensive cost is not obviously reduced, and the consumption of the water resources is not in line with the implementation of the environmental protection concept.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a benzene vapour recovery unit for trioxymethylene processing, it is not obvious that the comprehensive cost who aims at solving the benzene vapour recovery unit among the prior art reduces, the problem of the implementation that does not accord with the environmental protection theory yet of consumeing of water resource.
In order to achieve the above purpose, the utility model adopts the following technical scheme: the benzene vapor recovery device for trioxymethylene processing comprises a heat pump system, wherein an evaporator in the heat pump system is arranged in a condensing tank, a condenser in the heat pump system is arranged in a heating tank, the top of a material storage tank containing benzene vapor is communicated with the middle of the condensing tank, and the lower part of the condensing tank is communicated with the middle of a layering tank; the distillation device is characterized by further comprising a distillation tank, wherein the distillation tank is divided into a distillation chamber positioned at the upper part and a heating chamber positioned at the lower part by a partition plate, water is injected into the heating tank, the upper part of the heating tank is communicated with the upper part of the heating chamber, the lower part of the heating chamber is communicated with the lower part of the heating tank, and the upper part of the layering tank is communicated with the distillation chamber; still include the dewatering jar, be provided with anhydrous sodium sulfate layer in the dewatering jar, the upper portion of condensing jar with the lower part switch-on of the upper portion and the dewatering jar of distillation chamber, the upper portion switch-on high-purity benzene vapour output tube of dewatering jar.
The heat pump system comprises an evaporator, a condenser, two refrigerant pipes for communicating the evaporator and the condenser, and a compression pump and an expansion valve which are respectively arranged on the two refrigerant pipes.
The distillation device is characterized in that a temperature sensor is installed in the distillation chamber, the upper portion of the heating tank is communicated with the upper portion of the heating chamber through a steam pipe, an electric control valve is installed on the steam pipe, and the temperature sensor is in signal connection with the electric control valve.
The lower part of the distillation chamber is communicated with an organic solvent discharge pipe.
And a drainage pipe for draining water from the lower part of the layering tank is communicated with the lower part of the layering tank.
The anhydrous sodium sulfate layer comprises a stainless steel cover net arranged on the inner wall of the water removing tank and anhydrous sodium sulfate powder filled in the stainless steel cover net.
The anhydrous sodium sulfate layer comprises a cotton cloth bag arranged on the inner wall of the water removing tank and anhydrous sodium sulfate powder filled in the cotton cloth bag.
The utility model has the advantages that: the utility model discloses in, can separate comdenstion water, other organic solvents and high-purity benzene steam with the benzene vapour that generates in the trioxymethylene course of working, the recovery efficiency of benzene is high, and the unit consumption of saving benzene by a wide margin practices thrift the cost, moreover the utility model discloses in no longer extra consumption water resource etc. avoided the waste of resource, environmental protection more.
Drawings
FIG. 1 is a schematic diagram of a specific embodiment of a benzene vapor recovery unit for trioxymethylene processing.
Fig. 2 is a circuit diagram of the signal connection of the temperature sensor and the electric control valve.
Detailed Description
The following description will further describe embodiments of the present invention with reference to the accompanying drawings.
As shown in fig. 1 and 2, a benzene vapor recovery device for trioxymethylene processing comprises a heat pump system, wherein an evaporator 3 in the heat pump system is arranged in a condensing tank 8, a condenser 4 in the heat pump system is arranged in a heating tank 9, the top of a material storage tank 1 containing benzene vapor is communicated with the middle of the condensing tank 8, the lower part of the condensing tank 8 is communicated with the middle of a layering tank 2, specifically, the heat pump system comprises the evaporator 3, the condenser 4, two refrigerant pipes 5 for communicating the evaporator 3 and the condenser 4, a compression pump 7 and an expansion valve 6 which are respectively arranged on the two refrigerant pipes 5, and the lower part of the layering tank 2 is communicated with a drain pipe 10 for draining water layered to the lower part;
the distillation device further comprises a distillation tank 11, the distillation tank 11 is internally divided into a distillation chamber 13 positioned at the upper part and a heating chamber 14 positioned at the lower part by a partition plate 12, water is filled in the heating tank 9, the upper part of the heating tank 9 is communicated with the upper part of the heating chamber 14, the lower part of the heating chamber 14 is communicated with the lower part of the heating tank 9, the upper part of the layering tank 2 is communicated with the distillation chamber 13, and the lower part of the distillation chamber 13 is communicated with an organic solvent discharge pipe 18;
the distillation device is characterized by further comprising a dewatering tank 15, wherein an anhydrous sodium sulfate layer 16 is arranged in the dewatering tank 15, the upper portion of the condensation tank 8 and the upper portion of the distillation chamber 13 are communicated with the lower portion of the dewatering tank 15, and the upper portion of the dewatering tank 15 is communicated with a high-purity benzene vapor output pipe 17.
Benzene gas in the material storage tank 1 containing the benzene gas enters the condensing tank 8, in the heat pump system, as the evaporator 3 can absorb a large amount of heat from the external environment, the temperature in the condensing tank 8 is low, after the benzene gas enters the condensing tank 8, most of the benzene gas is condensed into benzene-water mixed liquid, the benzene-water mixed liquid enters the layering tank 2, after the benzene-water mixed liquid is stood in the layering tank 2, the benzene liquid is positioned at the upper layer and is positioned at the lower layer, and water positioned at the lower layer is discharged through the water discharge pipe 10 and can be recovered; the benzene liquid at the upper layer enters a distillation chamber 13 in a distillation tank 11, meanwhile, in a heat pump system, a condenser 4 releases a large amount of heat from the external environment, so that a large amount of heat exists in a heating tank 9, water in the heating tank 9 absorbs the heat and generates steam, the steam enters a heating chamber 14 to heat the heating chamber 14, so that the benzene liquid in the distillation chamber 13 is heated and boiled, the boiling point of the benzene is 80.1 ℃, so that the distillation chamber 13 is ensured to be 80.1-85 ℃, the benzene liquid can be boiled and generates benzene steam, a small part of water and other organic solvents in the benzene liquid are difficult to boil and generate steam, so that high-purity benzene steam is generated in the distillation chamber 13, then high-purity benzene steam is generated in the distillation chamber 13, and a small part of benzene steam which is not condensed in the condensation tank 8 enters a water removal tank 15, the water content of the benzene vapor is absorbed by the anhydrous sodium sulfate, so that the benzene vapor with high purity is discharged and recovered through the benzene vapor discharge pipe 17, and a small part of the water and other organic solvents remaining in the distillation chamber 13 is periodically discharged through the organic solvent discharge pipe 18.
The utility model discloses in, can separate comdenstion water, other organic solvents and high-purity benzene steam with the benzene vapour that generates in the trioxymethylene course of working, the recovery efficiency of benzene is high, and the unit consumption of saving benzene by a wide margin practices thrift the cost, moreover the utility model discloses in no longer extra consumption water resource etc. avoided the waste of resource, environmental protection more.
In the embodiment, in order to ensure that a constant temperature environment of 80.1-85 ℃ can be ensured in the distillation chamber 13, further, a temperature sensor 19 is installed in the distillation chamber 13, the upper part of the heating tank 9 is communicated with the upper part of the heating chamber 14 through a steam pipe, an electronic control valve 20 is installed on the steam pipe, and the temperature sensor 19 is in signal connection with the electronic control valve 20; when the temperature sensor 19 detects that the temperature in the distillation chamber 13 is higher than the preset value, the temperature sensor 19 transmits a signal to the electric control valve 20, the electric control valve 20 is closed, the steam in the heating tank 9 is stopped entering the heating chamber 14, the heat in the distillation chamber 13 is reduced, and the temperature in the distillation chamber 13 is kept within 80.1-85 ℃.
In this embodiment, the anhydrous sodium sulfate layer 16 includes a stainless steel cover net disposed on the inner wall of the water removal tank 15 and anhydrous sodium sulfate powder filled in the stainless steel cover net.
In this embodiment, the anhydrous sodium sulfate layer 16 includes a cotton cloth bag disposed on the inner wall of the dewatering tank 15 and anhydrous sodium sulfate powder filled in the cotton cloth bag.
In the description of the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Claims (7)
1. A benzene vapor recovery device for trioxymethylene processing is characterized by comprising a heat pump system, wherein an evaporator (3) in the heat pump system is arranged in a condensing tank (8), a condenser (4) in the heat pump system is arranged in a heating tank (9), the top of a material storage tank (1) containing benzene vapor is communicated with the middle part of the condensing tank (8), and the lower part of the condensing tank (8) is communicated with the middle part of a layering tank (2);
the distillation device is characterized by further comprising a distillation tank (11), the distillation tank (11) is internally divided into a distillation chamber (13) positioned at the upper part and a heating chamber (14) positioned at the lower part by a partition plate (12), water is injected into the heating tank (9), the upper part of the heating tank (9) is communicated with the upper part of the heating chamber (14), the lower part of the heating chamber (14) is communicated with the lower part of the heating tank (9), and the upper part of the layering tank (2) is communicated with the distillation chamber (13);
the device is characterized by further comprising a water removal tank (15), wherein an anhydrous sodium sulfate layer (16) is arranged in the water removal tank (15), the upper portion of the condensation tank (8) and the upper portion of the distillation chamber (13) are communicated with the lower portion of the water removal tank (15), and the upper portion of the water removal tank (15) is communicated with a high-purity benzene gas output pipe (17).
2. The benzene vapor recovery device for trioxymethylene processing according to claim 1, wherein said heat pump system comprises an evaporator (3), a condenser (4), two refrigerant pipes (5) for connecting the evaporator (3) and the condenser (4), and a compression pump (7) and an expansion valve (6) respectively installed on the two refrigerant pipes (5).
3. The benzene vapor recovery device for trioxymethylene processing according to claim 1, wherein a temperature sensor (19) is installed in the distillation chamber (13), the upper part of the heating tank (9) is communicated with the upper part of the heating chamber (14) through a steam pipe, an electric control valve (20) is installed on the steam pipe, and the temperature sensor (19) is in signal connection with the electric control valve (20).
4. The benzene vapor recovery device for trioxymethylene processing according to claim 1, wherein the lower portion of said distillation chamber (13) is connected to an organic solvent discharge pipe (18).
5. The benzene vapor recovery device for trioxymethylene processing according to claim 1, wherein a drain pipe (10) for discharging water layered to the lower part is connected to the lower part of the layered tank (2).
6. The benzene vapor recovery device for trioxymethylene processing according to any one of claims 1 to 5, wherein said anhydrous sodium sulfate layer (16) comprises a stainless steel cover net disposed on the inner wall of the water removing tank (15) and anhydrous sodium sulfate powder filled in the stainless steel cover net.
7. The benzene vapor recovery device for trioxymethylene processing according to any one of claims 1 to 5, wherein said anhydrous sodium sulfate layer (16) comprises a cotton cloth bag disposed on the inner wall of the water removing tank (15) and anhydrous sodium sulfate powder filled in the cotton cloth bag.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921162314.6U CN210251293U (en) | 2019-07-23 | 2019-07-23 | Benzene vapor recovery device for trioxymethylene processing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921162314.6U CN210251293U (en) | 2019-07-23 | 2019-07-23 | Benzene vapor recovery device for trioxymethylene processing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210251293U true CN210251293U (en) | 2020-04-07 |
Family
ID=70013971
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921162314.6U Expired - Fee Related CN210251293U (en) | 2019-07-23 | 2019-07-23 | Benzene vapor recovery device for trioxymethylene processing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210251293U (en) |
-
2019
- 2019-07-23 CN CN201921162314.6U patent/CN210251293U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200407 Termination date: 20210723 |
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| CF01 | Termination of patent right due to non-payment of annual fee |