Vinyl chloride dehydration drying tower exhaust pressure stabilizing device
By setting up a steady flow and pressure stabilization system between the vinyl chloride dehydration and drying tower and the gas cabinet, and using the interlocking control of the regulating valve and flowmeter, the problem of large exhaust volume during regeneration of the dehydration and drying tower is solved, and the stability of gas emissions and the long life of the equipment are achieved.
Patent Information
- Application Number
- CN202422653851.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-31
- Publication Date
- 2025-08-12
- Estimated Expiration
- 2034-10-31
AI Technical Summary
During the acetylene vinyl chloride synthesis process, the emission of nitrogen and vinyl chloride mixed gas during regeneration of the dehydration and drying tower is large, which easily leads to a sharp rise in the gas cabinet air hood and a top-turning air hood.
A vinyl chloride dehydration drying tower exhaust pressure stabilization device is designed, including a vinyl chloride dehydration drying tower, a vinyl chloride dehydration tank, a vinyl chloride dehydration tank, a vent tank and a gas cabinet and a pressure stabilization system. Through the interlocking control of the regulating valve and the flowmeter, the gas flow rate and pressure stabilization can be achieved.
It effectively avoids the overturning of the air hood caused by excessive gas flow. It has a simple structure, low cost and easy maintenance, and extends the service life of the equipment.
Smart Images
Figure CN223216136U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of vinyl chloride synthesis equipment, and in particular relates to an exhaust pressure stabilizing device for a vinyl chloride dehydration drying tower. Background Art
[0002] In the synthesis of vinyl chloride by the acetylene method, acetylene is mixed with hydrogen chloride and then goes through freeze dehydration, vinyl chloride conversion, water washing, alkali washing, compression, dehydration drying tower, and distillation to produce qualified vinyl chloride. The dehydration drying tower is equipped with a desiccant. After running for a period of time, the dehydration drying tower is saturated with water adsorption. Nitrogen is used to regenerate the dehydration drying tower. After regeneration, the nitrogen contains vinyl chloride and cannot be discharged. This part of the nitrogen and vinyl chloride mixture is discharged to the gas cabinet for recovery. Due to the large volume of this part of the nitrogen and vinyl chloride mixture, improper operation can easily cause the gas hood of the gas cabinet to rise sharply and overturn the gas hood. Utility Model Content
[0003] The purpose of the utility model is to provide a vinyl chloride dehydration drying tower exhaust pressure stabilizing device with simple structure, low manufacturing cost, easy use and easy maintenance, so as to solve the problems of large exhaust volume and short exhaust time in the regeneration stage of the dehydration drying tower.
[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0005] A vinyl chloride dehydration and drying tower exhaust pressure stabilizing device comprises a vinyl chloride dehydration and drying tower, a vinyl chloride dehydration and drying tower exhaust pipe is provided on one side of the vinyl chloride dehydration and drying tower, the other end of the vinyl chloride dehydration and drying tower exhaust pipe is connected to a pressure stabilizing tank, a pressure stabilizing tank exhaust pipe is provided on one side of the pressure stabilizing tank, the other end of the pressure stabilizing tank exhaust pipe is connected to an exhaust tank, an exhaust tank exhaust pipe is provided on one side of the exhaust tank, and the other end of the exhaust tank exhaust pipe is connected to a gas holder.
[0006] Preferably, a No. 1 regulating valve is provided on the exhaust pipe of the vinyl chloride dehydration drying tower.
[0007] Preferably, a pressure gauge is provided on the pressure stabilizing tank, a 2# regulating valve is provided on the exhaust pipe of the pressure stabilizing tank, and the pressure gauge is interlocked with the 2# regulating valve for control.
[0008] Preferably, a 3# regulating valve and a flow meter are sequentially provided on the exhaust pipe of the exhaust tank, and the 3# regulating valve and the flow meter are interlockedly controlled.
[0009] The beneficial effects of the utility model are:
[0010] The utility model realizes the stability of the exhaust of the vinyl chloride dehydration drying tower by arranging a flow stabilization system and a pressure stabilization system between the vinyl chloride dehydration drying tower and the gas cabinet, thereby avoiding the phenomenon of the gas hood being overturned due to excessive gas flow. The utility model has the advantages of simple structure, low manufacturing cost, convenient use, easy maintenance and long service life.
[0011] The utility model extends the exhaust time by arranging a regulating valve on the exhaust pipe of the vinyl chloride dehydration drying tower, and stabilizes the exhaust pressure of the system by a pressure stabilizing tank, a regulating valve on the exhaust pipe of the pressure stabilizing tank, and a pressure gauge on the pressure stabilizing tank. Finally, the exhaust flow is controlled by using the exhaust tank, the regulating valve on the exhaust pipe of the exhaust tank, and a flow meter. The utility model is widely used in the field of vinyl chloride synthesis. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a structural diagram of the utility model;
[0013] In the figure: 1. Vinyl chloride dehydration drying tower, 2. Vinyl chloride dehydration drying tower exhaust pipe, 3. 1# regulating valve, 4. Pressure regulating tank, 5. Pressure regulating tank exhaust pipe, 6. 2# regulating valve, 7. Pressure gauge, 8. Exhaust tank, 9. Exhaust tank exhaust pipe, 10. 3# regulating valve, 11. Flow meter, 12. Gas cabinet. DETAILED DESCRIPTION
[0014] The present invention will be further described below with reference to the accompanying drawings and specific implementation principles:
[0015] like Figure 1 The exhaust pressure stabilizing device of a vinyl chloride dehydration and drying tower shown in the figure includes a vinyl chloride dehydration and drying tower 1, a vinyl chloride dehydration and drying tower exhaust pipe 2 is installed on one side of the vinyl chloride dehydration and drying tower 1, the other end of the vinyl chloride dehydration and drying tower exhaust pipe 2 is installed and connected to a pressure stabilizing tank 4, a pressure stabilizing tank exhaust pipe 5 is installed on one side of the pressure stabilizing tank 4, the other end of the pressure stabilizing tank exhaust pipe 5 is installed and connected to an exhaust tank 8, an exhaust tank exhaust pipe 9 is installed on one side of the exhaust tank 8, and the other end of the exhaust tank exhaust pipe 9 is installed and connected to a gas cabinet 12.
[0016] A 1# regulating valve 3 is installed on the exhaust pipe 2 of the vinyl chloride dehydration drying tower. By adjusting the valve opening of the 1# regulating valve 3, the exhaust time is extended to control the exhaust flow rate of the nitrogen and vinyl chloride mixed gas in the vinyl chloride dehydration drying tower.
[0017] A pressure gauge 7 is installed on the surge tank 4, and a 2# regulating valve 6 is installed on the surge tank exhaust pipe 5. The pressure gauge 7 and the 2# regulating valve 6 are interlocked and controlled to stabilize the pressure in the surge tank 4.
[0018] A 3# regulating valve 10 and a flow meter 11 are sequentially installed on the exhaust pipe 9 of the exhaust tank. The 3# regulating valve 10 and the flow meter 11 are interlockedly controlled to stabilize the exhaust flow.
[0019] When in use, the pressure stabilizing system between the vinyl chloride dehydration drying tower 1 and the gas cabinet 12 is controlled, and the pressure stabilizing system includes 1# regulating valve 3, pressure stabilizing tank 4, pressure stabilizing tank exhaust pipe 5, 2# regulating valve 6, pressure gauge 7, exhaust tank 8, exhaust tank exhaust pipe 9, 3# regulating valve 10, and flow meter 11. First, the exhaust gas volume of the nitrogen and vinyl chloride mixed gas in the vinyl chloride dehydration drying tower 1 in the whole system is controlled by controlling 1# regulating valve 3, and then the system pressure is stabilized by the pressure stabilizing system including pressure stabilizing tank 4, pressure stabilizing tank exhaust pipe 5, 2# regulating valve 6, and pressure gauge 7. Its working principle is that after the gas flows into the pressure stabilizing tank 4, the pressure gauge 7 in the pressure stabilizing tank 4 measures the air pressure in the pressure stabilizing tank 4 in real time, and the pressure gauge 7 and the 2# regulating valve 6 are connected. The signals are interlocked and controlled. When the data on the pressure gauge 7 is too large, the opening of the 2# regulating valve 6 is increased. When the data on the pressure gauge 7 is too small, the opening of the 2# regulating valve 6 is decreased to achieve pressure stabilization, thereby stabilizing the pressure of the entire system. Then, a flow stabilization system including an exhaust tank 8, an exhaust tank exhaust pipe 9, a 3# regulating valve 10, and a flow meter 11 is used to achieve flow stabilization. The working principle is that after the gas flows into the exhaust tank 8, and then flows into the gas cabinet 12 through the exhaust tank exhaust pipe 9, the 3# regulating valve 10 and the flow meter 11 are interlocked and controlled. When the data on the flow meter 11 is too small, the opening of the 3# regulating valve 10 is increased. When the data on the flow meter 11 is too large, the opening of the 3# regulating valve 10 is decreased to achieve flow stabilization, thereby stabilizing the gas flow of the entire system.
Claims
1. A chlorinated vinyl dehydration drying tower exhaust pressure stabilizing device, comprising a chlorinated vinyl dehydration drying tower, characterized in that: A vinyl chloride dehydration drying tower exhaust pipe (2) is provided on one side of the vinyl chloride dehydration drying tower (1); the other end of the vinyl chloride dehydration drying tower exhaust pipe (2) is connected to a pressure stabilizing tank (4); a pressure stabilizing tank exhaust pipe (5) is provided on one side of the pressure stabilizing tank (4); the other end of the pressure stabilizing tank exhaust pipe (5) is connected to an exhaust tank (8); a gas tank exhaust pipe (9) is provided on one side of the exhaust tank (8); the other end of the gas tank exhaust pipe (9) is connected to a gas cabinet (12).
2. The exhaust pressure stabilizing device for a vinyl chloride dehydration drying tower according to claim 1, characterized in that: The exhaust pipe (2) of the vinyl chloride dehydration drying tower is provided with a No. 1 regulating valve (3).
3. The exhaust pressure stabilizing device for a vinyl chloride dehydration drying tower according to claim 1, characterized in that: The pressure stabilizing tank (4) is provided with a pressure gauge (7), and the pressure stabilizing tank exhaust pipe (5) is provided with a 2# regulating valve (6). The pressure gauge (7) and the 2# regulating valve (6) are interlocked and controlled.
4. The exhaust pressure stabilizing device for a vinyl chloride dehydration drying tower according to claim 1, characterized in that: A 3# regulating valve (10) and a flow meter (11) are sequentially provided on the exhaust pipe (9) of the exhaust tank, and the 3# regulating valve (10) and the flow meter (11) are interlockedly controlled.