CN218529843U - Cooling equipment for dichloroethane recovery - Google Patents

Cooling equipment for dichloroethane recovery Download PDF

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Publication number
CN218529843U
CN218529843U CN202222685800.4U CN202222685800U CN218529843U CN 218529843 U CN218529843 U CN 218529843U CN 202222685800 U CN202222685800 U CN 202222685800U CN 218529843 U CN218529843 U CN 218529843U
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China
Prior art keywords
heat exchange
casing
exchange tube
pipe
dichloroethane
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CN202222685800.4U
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Chinese (zh)
Inventor
吴三林
祈剑
王帅
孙卫星
刘凯
王建荣
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Changqing Hubei Biotechnology Co ltd
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Changqing Hubei Biotechnology Co ltd
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Abstract

The utility model provides a dichloroethane retrieves and uses cooling equipment, including the sealed column casing in both ends, parallel arrangement in the casing and pass the heat exchange tube at casing both ends and connect respectively in the top of casing and the feed liquor pipe and the drain pipe of bottom, be provided with the branch pipe in the heat exchange tube, branch pipe perpendicular to heat exchange tube, and the both ends of branch pipe and the inside of casing together, the coaxial rotation in the heat exchange tube is provided with the (mixing) shaft, the (mixing) shaft is rotated through the driving piece drive of installing on the casing, be provided with impeller on the (mixing) shaft, impeller is located the top of branch pipe. The utility model discloses the effect of the efficiency of the dichloroethane condensation recovery has been improved.

Description

Cooling equipment for dichloroethane recovery
Technical Field
The utility model relates to a technical field is retrieved to the dichloroethane, especially relates to a condensation equipment is used in dichloroethane recovery.
Background
When preparing the cyhalothrin acyl chloride, cyhalothrin acid, a catalyst and dichloroethane are input into a synthesis kettle, and after the reaction is finished, the dichloroethane needs to be recovered from a synthesis solution.
When dichloroethane is recovered, the temperature is reduced to the boiling point of dichloroethane by using the relation that the saturated vapor pressure of the dichloroethane is reduced along with the reduction of the temperature, so that the dichloroethane is changed from a gas state to a liquid state, the conventional temperature reduction mode generally adopts the steps of introducing waste gas into a condenser, and reducing the temperature of the waste gas and condensing the waste gas by using cooling water in the condenser; however, in the condenser, the tube pass of the arranged condensing tube is large, and the condensing reflux time is long, so that the recovery efficiency is low.
SUMMERY OF THE UTILITY MODEL
To the not enough that exists among the prior art, the utility model provides a condensing equipment is used in dichloroethane recovery, it has solved the problem that the condensation recovery efficiency that exists is low among the prior art.
According to the utility model discloses an embodiment, cooling device is used in dichloroethane recovery, including the sealed column casing in both ends, parallel arrangement in the casing and pass the heat exchange tube at casing both ends and connect respectively in the top of casing and the feed liquor pipe and the drain pipe of bottom, be provided with the branch pipe in the heat exchange tube, branch pipe perpendicular to heat exchange tube, and the both ends of branch pipe and the inside of casing together, coaxial rotation is provided with the (mixing) shaft in the heat exchange tube, the (mixing) shaft is rotated through the driving piece drive of installing on the casing, be provided with impeller on the (mixing) shaft, impeller is located the top of branch pipe.
Preferably, the both sides of heat exchange tube all are provided with and are used for connecting the baffle of casing, the baffle is followed the axial of casing is arranged and is equallyd divide the casing, be provided with between heat exchange tube and the casing along the axial of casing will the baffle of a plurality of heat transfer chambeies is cut apart into to the casing, is located the heat transfer chamber staggered arrangement of baffle both sides, and passes through between the heat transfer chamber the branch pipe communicates in succession.
Preferably, the cooling water is input from the liquid inlet pipe and is discharged from the liquid outlet pipe.
Preferably, the heat exchange tube has an elliptical cross-section, and the branch tube is perpendicular to the longer axis of the heat exchange tube cross-section.
Preferably, the driving part comprises a motor and a speed reducer which are arranged on a sealing plate at the end part of the shell, the motor is in transmission connection with the speed reducer, an output shaft of the speed reducer is in transmission connection with a transmission shaft which is rotatably arranged in the heat exchange tube, and the transmission shaft is in transmission connection with the stirring shaft through a group of bevel gears which are meshed with each other.
Preferably, a connecting pipe for rotatably mounting the transmission shaft is arranged in the heat exchange pipe.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. the contact area of the heat exchange tube and the waste gas is increased by adding the branch tube vertical to the axial direction of the heat exchange tube in the heat exchange tube, and the waste gas condensation efficiency is improved.
2. The branch pipes are arranged in the heat exchange pipes, so that the flowing speed of the waste gas can be reduced, the temperature of the waste gas in the heat exchange pipes can be sufficiently reduced, and the content of dichloroethane in the waste gas is reduced.
3. Set up impeller, rotate through driving piece drive (mixing) shaft, and then drive impeller and rotate, impeller stirs the inside waste gas of heat exchange tube for the abundant outer wall contact with the inner wall of heat exchange tube and branch pipe of waste gas improves waste gas temperature's homogeneity, improves dichloroethane's recovery quality.
4. Through the abundant and waste gas contact with of branch pipe and heat exchange tube, the condensation of dichloroethane in the waste gas is accelerated, and then shortens the length of heat exchange tube for liquid dichloroethane can be more rapid backward flow as for in the collection tank that the heat exchange tube bottom is connected, improve dichloroethane's condensation recovery efficiency.
Drawings
Fig. 1 is a schematic diagram of an internal structure of an embodiment of the present invention.
Fig. 2 isbase:Sub>A sectional view taken along the linebase:Sub>A-base:Sub>A in fig. 1.
Fig. 3 is an enlarged view of the region B in fig. 1.
In the above drawings: 1. a housing; 2. closing the plate; 3. a liquid inlet pipe; 4. a liquid outlet pipe; 5. a heat exchange pipe; 6. a baffle plate; 7. a stirring shaft; 8. a stirring impeller; 9. a driven gear; 10. a driving gear; 11. a drive member; 12. a branch pipe; 13. a partition plate; 14. a connecting pipe; 15. a drive shaft.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.
As shown in fig. 1 to 3, in order to improve the efficiency of recovering dichloroethane in the off-gas. The utility model provides a dichloroethane retrieves and uses cooling equipment, including both ends sealed column casing 1, parallel arrangement is in casing 1 and pass the heat exchange tube 5 at casing 1 both ends and connect respectively in the feed liquor pipe 3 and the drain pipe 4 of the top of casing 1 and bottom, be provided with branch pipe 12 in the heat exchange tube 5, branch pipe 12 perpendicular to heat exchange tube 5, and the both ends of branch pipe 12 and casing 1's inside together, coaxial rotation is provided with (mixing) shaft 7 in the heat exchange tube 5, the (mixing) shaft 7 rotates through the drive of the driving piece 11 of installing on casing 1, be provided with impeller 8 on the (mixing) shaft 7, impeller 8 is located the top of branch pipe 12.
Input waste gas to heat exchange tube 5 from the bottom of heat exchange tube 5 in, when waste gas flows in heat exchange tube 5, with from the feed liquor pipe 3 in the coolant liquid of input to casing 1 carry out the heat transfer through heat exchange tube 5, and simultaneously, utilize and arrange and carry out more abundant heat transfer with branch pipe 12 in the heat exchange tube 5, when carrying out the heat exchange, through driving piece 11 drive (mixing) shaft 7, (mixing) shaft 7 drives impeller 8 and rotates, impeller 8 stirs the waste gas that has just been exchanged, make the low temperature waste gas that is located the edge carry out abundant mixture with the high temperature waste gas that is located the middle part, make the temperature of waste gas more even. The condensed dichloroethane flows into a collecting tank connected to the bottom end of the heat exchange tube 5 through the tube wall of the heat exchange tube 5 to collect the dichloroethane, so that the bottom end of the heat exchange tube 5 is of a three-way structure. After the collection of a large amount of dichloroethane in the waste gas is finished, the top section pipe orifice of the heat exchange pipe 5 is connected with an activated carbon adsorption device to further purify the waste gas; the cooling water having an increased temperature by the heat exchange is discharged through the liquid outlet pipe 4 at the top of the housing 1.
As shown in fig. 1 to 3, a flow path of cooling water between the housing 1 and the heat exchange pipe 5 is controlled. The two sides of the heat exchange tube 5 are provided with partition plates 13 for connecting the shell 1, the partition plates 13 are arranged along the axial direction of the shell 1 and are equally divided into the shell 1, the heat exchange tube 5 and the shell 1 are provided with edges along the axial direction of the shell 1, the shell 1 is divided into a plurality of baffle plates 6 of heat exchange cavities, the heat exchange cavities on the two sides of the partition plates 13 are arranged in a staggered mode, and the heat exchange cavities are continuously communicated through the branch tubes 12.
The heat exchange cavities at two sides of the partition plate 13 are sequentially communicated through the branch pipes 12 arranged in the heat exchange pipe 5 to form a continuously bent cooling water flow path, the flow directions of the waste gas and the cooling water are the same, the waste gas and the cooling water can reach equal temperature after multiple heat exchanges, and meanwhile, the cooling water can be distributed according to temperature gradient and continuously exchanges heat with the waste gas due to the arrangement; the temperature of the cooling water discharged from the liquid outlet pipe 4 is equal to the temperature of the waste gas discharged from the top end of the heat exchange pipe 5, and a temperature sensor is arranged at the top end of the liquid outlet pipe 4 or the top end of the heat exchange pipe 5 to monitor whether the temperature of the waste gas discharged is lower than the set requirement.
As a preferred embodiment of the present invention, the temperature of the exhaust gas discharged from the top end of the heat exchange pipe 5 is controlled conveniently. Cooling water is input from the liquid inlet pipe 3 and is discharged from the liquid outlet pipe 4.
When the temperature of the discharged waste gas is higher than the set temperature, the flow rate of the cooling water in the liquid inlet pipe 3 is increased, so that the cooling water can absorb more heat in unit time, and the temperature of the discharged waste gas is reduced.
As shown in fig. 1-2, to increase the contact surface of the heat exchange tube 5 with the exhaust gas. The cross section of the heat exchange tube 5 is elliptical, and the branch tubes 12 are perpendicular to the longer axis of the cross section of the heat exchange tube 5.
The heat exchange tube 5 is formed in an oval shape in cross section, and more branch tubes 12 can be arranged in the heat exchange tube 5 in one plane, so that the exhaust gas can sufficiently contact the surfaces of the branch tubes 12 while passing through the heat exchange tube 5.
As shown in fig. 1 and 3, the stirring shaft 7 is driven to rotate. The driving part 11 comprises a motor and a speed reducer which are arranged on the sealing plate 2 at the end part of the shell 1, the motor is in transmission connection with the speed reducer, an output shaft of the speed reducer is in transmission connection with a transmission shaft 15 which is rotatably arranged in the heat exchange tube 5, and the transmission shaft 15 is in transmission connection with the stirring shaft 7 through a group of bevel gears which are meshed with each other.
End connection of transmission shaft 15 has driving gear 10, the top of (mixing) shaft 7 is connected with driven gear 9, driving gear 10 and driven gear 9 intermeshing, the output shaft and the reduction gear transmission of motor are connected, the motor passes through the reduction gear and drives transmission shaft 15 and rotate, transmission shaft 15 drives (mixing) shaft 7 through driving gear 10 and driven gear 9 and rotates, and then drive impeller 8 and rotate, can carry out abundant stirring through impeller 8 waste gas in to heat transfer pipe 5.
As shown in fig. 1-3, to improve the stability of the drive shaft 15. The heat exchange tube 5 is internally provided with a connecting tube 14 for rotatably mounting the transmission shaft 15. The transmission shaft 15 is rotatably installed in the connection pipe 14 by a seal gear, which can prevent the exhaust gas inside the heat exchange pipe 5 from being diffused.

Claims (6)

1. Cooling equipment is used in dichloroethane recovery, its characterized in that: the device comprises a cylindrical shell (1) with two sealed ends, heat exchange tubes (5) which are arranged in the shell (1) in parallel and penetrate through two ends of the shell (1), and a liquid inlet tube (3) and a liquid outlet tube (4) which are connected to the top end and the bottom end of the shell (1) respectively, wherein branch tubes (12) are arranged in the heat exchange tubes (5), the branch tubes (12) are perpendicular to the heat exchange tubes (5), two ends of the branch tubes (12) are connected with the inside of the shell (1), a stirring shaft (7) is coaxially arranged in the heat exchange tubes (5) in a rotating mode, the stirring shaft (7) is driven to rotate by a driving piece (11) arranged on the shell (1), stirring impellers (8) are arranged on the stirring shaft (7), and the stirring impellers (8) are located above the branch tubes (12).
2. The temperature lowering apparatus for dichloroethane recovery according to claim 1, characterized in that: the both sides of heat exchange tube (5) all are provided with and are used for connecting baffle (13) of casing (1), baffle (13) are followed the axial of casing (1) is arranged and is equallyd divide casing (1), be provided with between heat exchange tube (5) and casing (1) and follow the axial of casing (1) will baffle (6) of a plurality of heat transfer chambeies are cut apart into in casing (1), are located the heat transfer chamber staggered arrangement of baffle (13) both sides, and pass through between the heat transfer chamber branch pipe (12) communicate in succession.
3. The temperature-lowering equipment for dichloroethane recovery according to claim 2, characterized in that: cooling water is input from the liquid inlet pipe (3) and is discharged from the liquid outlet pipe (4).
4. The temperature-lowering equipment for dichloroethane recovery according to claim 1, characterized in that: the cross section of the heat exchange tube (5) is elliptical, and the branch tube (12) is perpendicular to the longer axis of the cross section of the heat exchange tube (5).
5. The temperature-lowering equipment for dichloroethane recovery according to claim 1, characterized in that: the driving piece (11) comprises a motor and a speed reducer which are arranged on a sealing plate (2) at the end part of the shell (1), the motor is in transmission connection with the speed reducer, an output shaft of the speed reducer is in transmission connection with a transmission shaft (15) which is rotatably arranged in the heat exchange tube (5), and the transmission shaft (15) is in transmission connection with the stirring shaft (7) through a group of bevel gears which are meshed with each other.
6. The temperature lowering apparatus for dichloroethane recovery according to claim 5, characterized in that: and a connecting pipe (14) for rotatably mounting the transmission shaft (15) is arranged in the heat exchange pipe (5).
CN202222685800.4U 2022-10-12 2022-10-12 Cooling equipment for dichloroethane recovery Active CN218529843U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202222685800.4U CN218529843U (en) 2022-10-12 2022-10-12 Cooling equipment for dichloroethane recovery

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202222685800.4U CN218529843U (en) 2022-10-12 2022-10-12 Cooling equipment for dichloroethane recovery

Publications (1)

Publication Number Publication Date
CN218529843U true CN218529843U (en) 2023-02-28

Family

ID=85277824

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202222685800.4U Active CN218529843U (en) 2022-10-12 2022-10-12 Cooling equipment for dichloroethane recovery

Country Status (1)

Country Link
CN (1) CN218529843U (en)

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