CN216457060U - Acetylene sludge recycling and desorption system - Google Patents
Acetylene sludge recycling and desorption system Download PDFInfo
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- CN216457060U CN216457060U CN202122074133.1U CN202122074133U CN216457060U CN 216457060 U CN216457060 U CN 216457060U CN 202122074133 U CN202122074133 U CN 202122074133U CN 216457060 U CN216457060 U CN 216457060U
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Abstract
The application discloses acetylene sludge recycling and desorption system, including the desorption tower, there are two first heat exchangers at the top of desorption tower through first pipe connection, first pipe connection is at the top of first heat exchanger, there is the second heat exchanger top one side of desorption tower still through second pipe connection, second pipe connection is at second heat exchanger one side lower extreme, the lower extreme of desorption tower is connected with the aqueduct, the bottom of first heat exchanger and second heat exchanger all is connected with safe water seal tank, there is the transport pump package at the top of second heat exchanger through third pipe connection, one side lower extreme of two first heat exchangers is through the fourth pipe connection on the third pipeline, be equipped with the valve on the third pipeline, the discharge end of transport pump package is connected with gas water separator. According to the utility model, the operation condition of the acetylene cooler is improved, and the content of acetylene gas carrying slag slurry entering a delivery pump at a gas phase outlet of the desorption tower is reduced; improve acetylene conveying pump group operating mode, improve equipment life, reduce equipment clearance frequency, guarantee the steady operation of system.
Description
Technical Field
The utility model relates to the technical field of acetylene production, in particular to an acetylene slurry recycling and desorption system.
Background
In the acetylene generating process of PVC (polyvinyl chloride) by a calcium carbide method, partial acetylene is dissolved in calcium carbide slurry while calcium carbide reacts with water to generate acetylene gas, and with the production concept of saving energy, protecting environment and reducing resource waste, the recovery of the acetylene gas in the calcium carbide slurry through a desorption tower becomes the basic operation of a calcium carbide plant, and with the problems in the production process and the analysis in the overhaul process, the following problems are found;
the gas phase pipeline at the top of the desorption tower is seriously carried with liquid, so that the desorbed acetylene gas carries liquid-phase carbide slag slurry to enter an acetylene cooler, the acetylene cooler is polluted and blocked in a short time after being overhauled, the heat exchange effect is poor, the carbide slag slurry also enters an acetylene conveying pump set along with the gas, the working pipeline of the acetylene conveying pump set is blocked, the pump work efficiency is low, the desorption effect is poor, and the pressure of the desorption tower frequently exceeds the index; meanwhile, the gas phase temperature from the acetylene cooler to the acetylene conveying pump is high, and the gas phase is liquid, so that the working efficiency of the acetylene conveying pump set is low, the desorption effect is poor, and the pressure of the desorption tower frequently exceeds the index; therefore, the high-pressure cleaning plate is periodically replaced in 3 months, the shell pass of the cooler is backwashed for 1 time every 2 days, the overhaul and the maintenance are needed twice every year, and the production is influenced.
SUMMERY OF THE UTILITY MODEL
The application provides an acetylene sludge slurry recycling desorption system, and solves the problems that when acetylene is recycled by traditional acetylene sludge, gas phase carries liquid, so that the pipeline is easy to be blocked, and the work power of a pump is low.
The application provides an acetylene sludge recycling desorption system, which comprises a desorption tower, wherein the top of the desorption tower is connected with two first heat exchangers through a first pipeline, the first pipeline is connected with the top of the first heat exchanger, one side of the top of the desorption tower is also connected with a second heat exchanger through a second pipeline, the second pipeline is connected with the lower end of one side of the second heat exchanger, the lower end of the desorption tower is connected with a aqueduct, the bottoms of the first heat exchanger and the second heat exchanger are both connected with a safe water seal tank, the top of the second heat exchanger is connected with a delivery pump set through a third pipeline, the lower end of one side of the first heat exchanger is connected on a third pipeline through a fourth pipeline, a valve is arranged on the third pipeline, the fourth pipeline is connected on the second pipeline through a fifth pipeline, and a control valve is arranged on the fifth pipeline, the discharge end of the delivery pump group is connected with a gas-water separator, the lower end of the gas-water separator is connected to the aqueduct, the upper end of the gas-water separator is connected with an acetylene buffer tank, and the gas-water separator is provided with a cooling water pipe.
Preferably, the desorption tower is a five-layer mesh tray, and the tray mesh size of the mesh tray is 50 mm.
Preferably, the circulating water return pipe of the second heat exchanger is connected with a U-shaped bent pipe, the height of the U-shaped bent pipe is the same as that of the pipe plate of the second heat exchanger, and an exhaust valve is arranged on the U-shaped bent pipe.
Preferably, the second heat exchanger is a shell and tube heat exchanger.
Preferably, the cooling water pipe is connected with factory water.
Preferably, the number of the delivery pumps of the delivery pump group is at least two.
Preferably, the first heat exchanger and the second heat exchanger are both cooled by circulating water.
According to the technical scheme, the acetylene slag slurry recycling and desorbing system comprises a pipeline, wherein the pipeline is used for conveying acetylene slag slurry to the middle of a desorption tower, the acetylene slag slurry is used for recycling acetylene gas in the desorption tower, a negative pressure is formed through a conveying pump unit, the recycled gas enters a first heat exchanger and a second heat exchanger through a first pipeline and a second pipeline at the upper end of the desorption tower respectively, the temperature of the acetylene gas is reduced, part of the mixed acetylene slag slurry is removed and discharged to a safe water seal tank and is sealed through the safe water seal tank, the cooled acetylene gas is pumped into the conveying pump unit, after the gas-water separation is completed through a gas-water separator, the acetylene is conveyed to an acetylene buffer tank and then guided into a gas cabinet, liquid-phase components are conveyed into a aqueduct, and when the first heat exchanger needs to be cleaned, a valve of a third pipeline and a valve at the upper end of the first heat exchanger are closed for cleaning, the equipment does not need to be shut down, and the maintenance frequency is reduced.
Compared with the prior art, the utility model has the beneficial effects that:
1. the three heat exchangers are matched to operate simultaneously, one heat exchanger operates the other two heat exchangers to clean during cleaning, the other heat exchanger is cleaned after cleaning is finished, the acetylene gas is cooled, the content of slag slurry in the acetylene gas is reduced, and the service life and the working efficiency of the conveying pump set are improved;
2. the system is sealed through the cooperation of the aqueduct and the safe water seal tank, and simultaneously, the slag slurry in the treatment process is absorbed, so that the stability of the system is improved, and the normal pressure in the system is ensured.
In conclusion, the utility model improves the operation condition of the acetylene cooler and reduces the content of acetylene gas entrained slag slurry entering a delivery pump at the gas phase outlet of the desorption tower; the working condition of an acetylene conveying pump group is improved, the service life of equipment is prolonged, the cleaning frequency of the equipment is reduced, and the stable operation of a system is ensured.
Drawings
In order to more clearly illustrate the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without any creative effort.
FIG. 1 is a schematic structural view of an acetylene sludge recycling desorption system provided by the utility model;
in the figure: the system comprises a desorption tower 1, a first heat exchanger 2, a second heat exchanger 3, an acetylene buffer tank 4, an acetylene cooler 5, a flume 6, a delivery pump unit 7 and a safety water seal tank 8.
Detailed Description
In order to make those skilled in the art better understand the technical solutions in the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings.
Referring to fig. 1, an acetylene sludge slurry recycling desorption system comprises a desorption tower 1, wherein acetylene gas in acetylene sludge slurry is taken out from the desorption tower 1 in a negative pressure stripping mode, the top of the desorption tower 1 is connected with two first heat exchangers 2 through a first pipeline, the acetylene gas is discharged through the top of the desorption tower 1 and sent to the heat exchangers, the first pipeline is connected with the tops of the first heat exchangers 2, the pressure in the heat exchangers is stable, one side of the top of the desorption tower 1 is also connected with a second heat exchanger 3 through a second pipeline, a circulating water return pipe of the second heat exchanger 3 is connected with a U-shaped bent pipe, the height of the U-shaped bent pipe is as high as that of the second heat exchanger 3, a pipe plate is arranged on the U-shaped bent pipe to ensure that the heat exchangers are filled with blades, the second heat exchanger 3 is a tubular heat exchanger, the heat exchange power is high, the acetylene sludge slurry recycling desorption system can operate independently in a short term, the heat exchangers can be cleaned conveniently, and the three heat exchangers operate simultaneously, the single heat exchanger has small operating pressure, the top parts of the first heat exchanger 2 and the second heat exchanger 3 are respectively provided with a control valve, the heat exchangers are convenient to close for cleaning, the first heat exchanger 2 and the second heat exchanger 3 are both cooled by circulating water, the cooling efficiency is high, a second pipeline is connected to the lower end of one side of the second heat exchanger 3, acetylene gas enters from the bottom side end and is discharged from the top end of the cooler;
the lower end of the desorption tower 1 is connected with an aqueduct for absorbing carbide slag slurry and sealing the system, the bottoms of the first heat exchanger 2 and the second heat exchanger 3 are both connected with a safe water seal groove 8 for water sealing the heat exchangers to improve the normal pressure in the system, the top of the second heat exchanger 3 is connected with a conveying pump set 7 through a third pipeline, the acetylene in the desorption tower 1 is absorbed by negative pressure formed by the conveying pump set 7, at least two conveying pumps of the conveying pump set 7 are arranged to ensure the stable operation of the system and avoid the stop condition, the lower ends of one side of the two first heat exchangers 2 are connected on the third pipeline through a fourth pipeline, a valve is arranged on the third pipeline, the communication of the first heat exchangers 2 is controlled through the valve, when the heat exchangers need to be cleaned, the valve is convenient to be closed for cleaning, the fourth pipeline is connected on the second pipeline through a fifth pipeline, and a control valve is arranged on the fifth pipeline, when the control valve is closed during operation, three heat exchangers run in parallel, the control valve is opened, when the valve on the third pipeline is closed, gas phase firstly enters two first heat exchangers 2, then the second heat exchanger 3 is carried out for series cooling, the cooled gas phase is contacted with cooling liquid of the second heat exchanger 3 again, slag slurry can better enter the cooling liquid to further reduce gas phase entrainment, the discharge end of a conveying pump group 7 is connected with a gas-water separator 5 for purifying acetylene gas and improving the purity of the acetylene gas, the lower end of the gas-water separator 5 is connected on a aqueduct 6 for sealing the gas-water separator 5 and absorbing the slag slurry, the upper end of the gas-water separator 5 is connected with an acetylene buffer tank 4, the acetylene is buffered by the acetylene buffer tank 4 and then discharged into a gas cabinet to complete recovery, a cooling water pipe is arranged on the gas-water separator 5 for cooling the purification process of the gas-water separator 5, the cooling water pipe is connected with the water for factories, the water pipe does not need to be arranged independently, the water for factories is directly utilized, and the arrangement cost is low.
In the utility model, a desorption tower 1 is a five-layer mesh tower tray, the size of the tower tray mesh of the mesh tower tray is 50mm, the original desorption tower equipment is of a 3-layer wire mesh tower tray structure, a carbide slag slurry pipeline enters from the space between a first layer tower tray and a second layer tower tray at the bottom end, the wire mesh of the tower tray is small, the phenomenon of serious blockage of a wire mesh hole occurs due to long-time operation, the lower liquid is not smooth, the acetylene gas at the top of the desorption tower is seriously clamped with the carbide mud slurry, the desorption tower tray needs to be frequently stopped to process the desorption tower tray, the tower tray of the desorption tower 1 is optimized from 3 layers into 5 layers of large-aperture (50mm) wire meshes, the position of a liquid inlet pipe is optimized to be liquid inlet from the space between the second layer and the third layer from the top, the high-temperature slag slurry enters the desorption tower in the operation process, and due to sudden pressure reduction, a part of the saturated liquid is converted into saturated steam and saturated liquid under the container pressure, so that the acetylene gas and the slag slurry are quickly separated, the content of the acetylene gas entrained slag slurry is reduced, and the entrainment of the acetylene gas into the waste liquid of the system is further reduced.
According to the technical scheme, when the acetylene gas recovery device is used, acetylene sludge is conveyed to the middle of the desorption tower 1 through a pipeline and is conveyed into the desorption tower 1, the acetylene gas is recovered in the desorption tower 1 by the acetylene sludge, negative pressure is formed by the conveying pump unit 7, the recovered gas enters the first heat exchanger 2 and the second heat exchanger 3 through the first pipeline and the second pipeline at the upper end of the desorption tower 1 respectively, the temperature of the acetylene gas is reduced, part of the mixed acetylene sludge is removed, the acetylene gas is discharged to the safe water seal tank 8 and is sealed through the safe water seal tank 8, the cooled acetylene gas is pumped into the conveying pump unit 7, after the gas-water separation is completed by the gas-water separator 5, the acetylene is conveyed to the acetylene buffer tank 4 and then is guided into the gas cabinet, liquid-phase components are conveyed into the aqueduct 6, when the first heat exchanger 2 needs to be cleaned, a valve of the third pipeline and a valve at the upper end of the first heat exchanger 2 are closed for cleaning, the equipment does not need to be shut down.
Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. This application is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the utility model pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope of the disclosure being indicated by the following claims.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The above-described embodiments of the present application do not limit the scope of the present application.
Claims (7)
1. The utility model provides an acetylene sludge slurry retrieves desorption system, includes desorption tower (1), its characterized in that: the top of the desorption tower (1) is connected with two first heat exchangers (2) through a first pipeline, the first pipeline is connected with the top of the first heat exchangers (2), one side of the top of the desorption tower (1) is also connected with a second heat exchanger (3) through a second pipeline, the second pipeline is connected with the lower end of one side of the second heat exchanger (3), the lower end of the desorption tower (1) is connected with a aqueduct, the bottoms of the first heat exchanger (2) and the second heat exchanger (3) are both connected with a safe water seal tank (8), the top of the second heat exchanger (3) is connected with a conveying pump group (7) through a third pipeline, the lower end of one side of the two first heat exchangers (2) is connected onto the third pipeline through a fourth pipeline, a valve is arranged on the third pipeline, and the fourth pipeline is connected onto the second pipeline through a fifth pipeline, and a control valve is arranged on the fifth pipeline, the discharge end of the delivery pump group (7) is connected with a gas-water separator (5), the lower end of the gas-water separator (5) is connected onto the aqueduct (6), the upper end of the gas-water separator (5) is connected with an acetylene buffer tank (4), and a cooling water pipe is arranged on the gas-water separator (5).
2. An acetylene sludge recovery and desorption system according to claim 1, characterized in that the desorption tower (1) is a five-layer mesh tray, and the tray mesh size of the mesh tray is 50 mm.
3. The acetylene sludge recycling and desorption system according to claim 1, wherein a circulating water return pipe of the second heat exchanger (3) is connected with a U-shaped bent pipe, the height of the U-shaped bent pipe is the same as that of a pipe plate of the second heat exchanger (3), and an exhaust valve is arranged on the U-shaped bent pipe.
4. An acetylene sludge recovery and desorption system according to claim 1, wherein the second heat exchanger (3) is a tube and tube heat exchanger.
5. The acetylene sludge recycling and desorbing system according to claim 1, wherein the cooling water pipe is connected with factory water.
6. An acetylene sludge recycling and desorbing system according to claim 1, wherein the number of the delivery pump units (7) is at least two.
7. An acetylene sludge recovery and desorption system according to claim 1, characterized in that the first heat exchanger (2) and the second heat exchanger (3) are both cooled by circulating water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122074133.1U CN216457060U (en) | 2021-08-31 | 2021-08-31 | Acetylene sludge recycling and desorption system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122074133.1U CN216457060U (en) | 2021-08-31 | 2021-08-31 | Acetylene sludge recycling and desorption system |
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| Publication Number | Publication Date |
|---|---|
| CN216457060U true CN216457060U (en) | 2022-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122074133.1U Active CN216457060U (en) | 2021-08-31 | 2021-08-31 | Acetylene sludge recycling and desorption system |
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| Country | Link |
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| CN (1) | CN216457060U (en) |
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2021
- 2021-08-31 CN CN202122074133.1U patent/CN216457060U/en active Active
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