Tail gas absorption device for chlorinated polyethylene production
By introducing spiral guide vanes and atomizing nozzles into the chlorinated polyethylene production unit, combined with gas detectors and electrically controlled valves, the problem of poor exhaust gas treatment effect was solved, achieving efficient and detectable exhaust gas treatment and ensuring that emissions meet standards.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- PANJIN CHANGRUI CHEM CO LTD
- Filing Date
- 2025-06-07
- Publication Date
- 2026-05-26
AI Technical Summary
In existing chlorinated polyethylene production tail gas treatment devices, the contact effect between the tail gas and the neutralization recovery liquid is poor, and there is a lack of effective detection methods, resulting in substandard treatment effects.
A tail gas absorption device for chlorinated polyethylene production was designed. It uses spiral guide vanes to increase the contact time between tail gas and neutralizing liquid, and sprays atomized liquid through atomizing nozzles to re-contact the tail gas. It is also equipped with a gas detector and an electrically controlled three-way valve to realize the recycling treatment and quality detection of tail gas.
It improves the quality of exhaust gas treatment, ensures that exhaust gas meets emission standards, achieves efficient treatment and detection of exhaust gas, and ensures the safety of emissions.
Smart Images
Figure CN224270732U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of chlorinated polyethylene production technology, and more specifically, to a tail gas absorption device for chlorinated polyethylene production. Background Technology
[0002] Chlorinated polyethylene (CPE) is a random polymer made by partially replacing hydrogen atoms in the molecular chain of high-density polyethylene with chlorine atoms. It appears as a white powder and is non-toxic. However, the exhaust gas from the CPE production equipment contains a large amount of acidic substances, and direct emission without treatment negatively impacts the external environment.
[0003] A search revealed that utility model patent CN216703925U discloses a tail gas recovery and emission device for chlorinated polyethylene production, including a recovery chamber and a gas diversion mechanism. The gas diversion mechanism is located in the middle of the recovery chamber and includes a dividing cylinder and mounting frames. Mounting frames are symmetrically arranged on the outer wall of the dividing cylinder. The dividing cylinder is fixedly connected to the inside of the recovery chamber by two mounting frames. A spiral belt is fixedly connected to the inside of the dividing cylinder. After the gas enters the inside of the dividing cylinder, it flows upward in a spiral manner along the spiral belt, increasing the residence time of the gas in the neutralized recovery liquid and improving the recovery effect. During the upward process, the gas carries the liquid inside the dividing cylinder upward, and the neutralized recovery liquid outside the dividing cylinder flows downward along the channel. The neutralized recovery liquid circulates up and down, making the solution concentration of the neutralized recovery liquid more uniform and further improving the neutralization and recovery effect. However, the above patents still have the following shortcomings: relying solely on the natural contact between the neutralization recovery liquid and the tail gas affects the tail gas treatment effect, and it is not convenient to test the treated tail gas, making it difficult to ensure that the emitted tail gas meets the emission standards. Therefore, we propose a tail gas absorption device for the production of chlorinated polyethylene. Utility Model Content
[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a tail gas absorption device for the production of chlorinated polyethylene.
[0005] To solve the above problems, the present invention adopts the following technical solution:
[0006] A tail gas absorption device for chlorinated polyethylene production includes a recovery chamber. An air inlet pipe is fixedly sleeved on the side of the recovery chamber. One end of the air inlet pipe extends into the inner cavity of the recovery chamber and is fixedly connected to a dividing cylinder. A spiral guide vane is fixedly connected to the inner cavity of the dividing cylinder. An air outlet pipe is fixedly connected to the top of the recovery chamber. A gas detector is installed on the air outlet pipe. A return gas mechanism is provided at the top of the air outlet pipe. A water pump is fixedly installed on the back of the recovery chamber. The input end of the water pump extends into the inner cavity of the recovery chamber. A liquid guide pipe is fixedly connected to the output end of the water pump. The end of the liquid guide pipe extends to the top of the recovery chamber and is fixedly connected to an annular pipe. Multiple atomizing nozzles are fixedly installed at the bottom of the annular pipe. The bottom ends of the multiple atomizing nozzles are all fixedly sleeved to the top of the inner cavity of the recovery chamber.
[0007] As a preferred embodiment of this utility model, the air return mechanism includes an electrically controlled three-way valve fixedly installed on the top of the air outlet pipe. An exhaust pipe is fixedly connected to the top of the electrically controlled three-way valve, and an air return pipe is fixedly connected to the side of the electrically controlled three-way valve. A three-way connector is fixedly connected to the end of the air return pipe. One side of the three-way connector is connected to the other end of the air inlet pipe, and a guide pipe is fixedly connected to the other end of the three-way connector.
[0008] As a preferred embodiment of this utility model, a pH sensor is fixedly installed on the inner wall of the recovery chamber, and a drain valve is fixedly installed at the bottom of the recovery chamber.
[0009] As a preferred embodiment of this utility model, a control panel is fixedly installed on the side of the recycling bin, and the control panel is electrically connected to the pH sensor, the gas detector, the water pump and the electrically controlled three-way valve respectively.
[0010] As a preferred embodiment of this utility model, a liquid filling pipe is fixedly sleeved on the side of the top of the recovery bin, and a plug is threaded onto the liquid filling pipe.
[0011] As a preferred embodiment of this utility model, the bottom surface of the recycling bin is fixedly connected with multiple support legs.
[0012] Compared with existing technologies, the advantages of this utility model are:
[0013] (1) In this utility model, after the exhaust gas is introduced into the inner cavity of the dividing cylinder from the intake pipe, the reaction time between the exhaust gas and the neutralization absorption liquid is increased by using the spiral guide vane. In addition, the neutralization recovery liquid at the bottom of the inner cavity of the recovery chamber is pumped into the inner cavity of the annular pipe by the water pump, and the neutralization recovery liquid in the inner cavity of the annular pipe is sprayed from the atomizing nozzle into the inner cavity of the recovery chamber. The neutralization recovery liquid sprayed by the atomizing nozzle comes into contact with the upward-moving exhaust gas again, ensuring the quality of exhaust gas treatment.
[0014] (2) In this utility model, when the exhaust gas is discharged from the outlet pipe, the concentration of chlorine and its compounds in the exhaust gas is detected by a gas detector. When the exhaust gas is qualified, it is discharged directly through the exhaust pipe. When the exhaust gas is unqualified, the exhaust gas is made to enter the three-way joint through the electric control three-way valve and the return pipe, and the exhaust gas is made to enter the separator cylinder again through the inlet pipe for absorption treatment, so as to ensure the quality of exhaust gas treatment and improve the working quality of the exhaust gas absorption device for chlorinated polyethylene production. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the overall structure of the front of this utility model;
[0016] Figure 2 This is a schematic diagram of the overall structure of the back of this utility model;
[0017] Figure 3 This is a cross-sectional schematic diagram of the recycling bin of this utility model;
[0018] Figure 4 This is a cross-sectional view of the dividing cylinder of this utility model.
[0019] Explanation of the labels in the diagram:
[0020] 1. Recovery bin; 2. Air inlet pipe; 3. Separating cylinder; 4. Spiral guide vane; 5. Water pump; 6. Liquid guide pipe; 7. Circular pipe; 8. Atomizing nozzle; 9. Air outlet pipe; 10. Gas detector; 11. Air return mechanism; 12. Electrically controlled three-way valve; 13. Exhaust pipe; 14. Air return pipe; 15. Three-way connector; 16. Air guide pipe; 17. Control panel; 18. pH sensor; 19. Drain valve; 20. Support leg; 21. Liquid filling pipe; 22. Pipe plug. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.
[0022] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," "outer," "top / bottom," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0023] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installed," "equipped with," "sleeved / connected," "connected," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.
[0024] Example:
[0025] Please see Figure 1-4 A tail gas absorption device for chlorinated polyethylene production includes a recovery chamber 1. An air inlet pipe 2 is fixedly sleeved on the side of the recovery chamber 1. One end of the air inlet pipe 2 extends into the inner cavity of the recovery chamber 1 and is fixedly connected to a dividing cylinder 3. A spiral guide vane 4 is fixedly connected to the inner cavity of the dividing cylinder 3. An air outlet pipe 9 is fixedly connected to the top of the recovery chamber 1. A gas detector 10 is installed on the air outlet pipe 9. A return gas mechanism 11 is provided at the top of the air outlet pipe 9. A water pump 5 is fixedly installed on the back of the recovery chamber 1. The input end of the water pump 5 extends into the inner cavity of the recovery chamber 1. A liquid guide pipe 6 is fixedly connected to the output end of the water pump 5. The end of the liquid guide pipe 6 extends into the top of the recovery chamber 1 and is fixedly connected to an annular pipe 7. Multiple atomizing nozzles 8 are fixedly installed at the bottom of the annular pipe 7. The bottom ends of the multiple atomizing nozzles 8 are all fixedly sleeved to the top of the inner cavity of the recovery chamber 1.
[0026] For details, please refer to Figure 1 The return air mechanism 11 includes an electrically controlled three-way valve 12 fixedly installed on the top of the exhaust pipe 9. An exhaust pipe 13 is fixedly connected to the top of the electrically controlled three-way valve 12, and a return air pipe 14 is fixedly connected to the side end of the electrically controlled three-way valve 12. A three-way connector 15 is fixedly connected to the end of the return air pipe 14. One side of the three-way connector 15 is connected to the other end of the intake pipe 2, and a guide air pipe 16 is fixedly connected to the other end of the three-way connector 15.
[0027] In this embodiment, when the gas detector 10 detects that the exhaust gas discharged from the exhaust pipe 9 is unqualified, the exhaust gas discharged from the exhaust pipe 9 is introduced into the inner cavity of the return pipe 14 through the electrically controlled three-way valve 12, and the exhaust gas is reintroduced into the inner cavity of the partition cylinder 3 through the return pipe 14, the three-way connector 15 and the inlet pipe 2 for exhaust gas absorption again. The gas detector 10 can be a chloride ion analyzer to detect the concentration of chlorine and its compounds in the exhaust gas.
[0028] For details, please refer to Figure 3 A pH sensor 18 is fixedly installed on the inner wall of the recovery chamber 1, and a drain valve 19 is fixedly installed at the bottom of the recovery chamber 1.
[0029] In this embodiment, the pH value of the neutralized recovery liquid in the inner cavity of the recovery chamber 1 is monitored by the pH sensor 18, and the neutralized recovery liquid in the recovery chamber 1 is released by the drain valve 19.
[0030] For details, please refer to Figures 1 to 3 A control panel 17 is fixedly installed on the side of the recycling bin 1. The control panel 17 is electrically connected to the pH sensor 18, the gas detector 10, the water pump 5, and the electrically controlled three-way valve 12.
[0031] In this embodiment, the control panel 17 is used to control the electrically controlled three-way valve 12 and the water pump 5, and the control panel 17 is used to process the data detected by the pH sensor 18 and the gas detector 10. An external power supply is used to power the control panel 17, the pH sensor 18, the gas detector 10, the water pump 5 and the electrically controlled three-way valve 12.
[0032] For details, please refer to Figure 2 A liquid filling pipe 21 is fixedly sleeved on the side of the top of the recovery chamber 1, and a plug 22 is threaded on the liquid filling pipe 21.
[0033] In this embodiment, neutralized recovery liquid is loaded into the inner cavity of the recovery chamber 1 through the liquid filling pipe 21, and the end of the liquid filling pipe 21 is sealed by the pipe plug 22.
[0034] For details, please refer to Figure 1 The bottom surface of the recycling bin 1 is fixedly connected with multiple support legs 20.
[0035] In this embodiment, multiple support legs 20 are used to support the recovery bin 1.
[0036] Working Principle: In operation, the exhaust gas to be treated is first introduced into the inner cavity of the separating cylinder 3 through the air guide pipe 16, the three-way connector 15, and the air inlet pipe 2. The exhaust gas is absorbed and neutralized by the neutralization recovery liquid in the recovery chamber 1 and the inner cavity of the separating cylinder 3. The spiral guide vanes 4 inside the separating cylinder 3 guide the exhaust gas, increasing the reaction time between the exhaust gas and the neutralization recovery liquid. Then, the water pump 5 is started to draw the neutralization recovery liquid from the bottom of the inner cavity of the recovery chamber 1 into the inner cavity of the annular pipe 7. The neutralization recovery liquid in the annular pipe 7 is then sprayed from the atomizing nozzle 8 into the inner cavity of the recovery chamber 1. The atomized neutralization recovery liquid sprayed from the atomizing nozzle 8 comes into contact with the upward-moving exhaust gas again, thus... The exhaust gas is then absorbed again. Finally, when the exhaust gas is discharged from the outlet pipe 9, the gas detector 10 is used to detect the concentration of chlorine and its compounds in the exhaust gas. When the exhaust gas is qualified, it is directly discharged through the exhaust pipe 13. When the exhaust gas is unqualified, the control panel 17 controls the end of the electrically controlled three-way valve 12 connected to the exhaust pipe 13 to close, and controls the end of the electrically controlled three-way valve 12 connected to the return pipe 14 to open, so that the exhaust gas enters the three-way connector 15 from the electrically controlled three-way valve 12 and the return pipe 14, and then enters the separator cylinder 3 again from the inlet pipe 2 for absorption treatment, so as to ensure the quality of exhaust gas treatment.
[0037] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model based on the technical solution and its improved concept should be covered within the protection scope of the present utility model.
Claims
1. A tail gas absorption device for chlorinated polyethylene production, comprising a recovery chamber (1), characterized in that: An air inlet pipe (2) is fixedly sleeved on the side of the recovery chamber (1). One end of the air inlet pipe (2) extends into the inner cavity of the recovery chamber (1) and is fixedly connected to a partition cylinder (3). A spiral guide vane (4) is fixedly connected to the inner cavity of the partition cylinder (3). An air outlet pipe (9) is fixedly connected to the top of the recovery chamber (1). A gas detector (10) is installed on the air outlet pipe (9). A return gas mechanism (11) is provided at the top of the air outlet pipe (9). A water pump (5) is fixedly installed on the back of (1). The input end of the water pump (5) extends into the inner cavity of the recovery chamber (1). The output end of the water pump (5) is fixedly connected to a liquid guide pipe (6). The end of the liquid guide pipe (6) extends to the top of the recovery chamber (1) and is fixedly connected to an annular pipe (7). Multiple atomizing nozzles (8) are fixedly installed at the bottom of the annular pipe (7). The bottom ends of the multiple atomizing nozzles (8) are all fixedly sleeved onto the top of the inner cavity of the recovery chamber (1).
2. The tail gas absorption device for chlorinated polyethylene production according to claim 1, characterized in that: The return air mechanism (11) includes an electrically controlled three-way valve (12) fixedly installed on the top of the air outlet pipe (9). An exhaust pipe (13) is fixedly connected to the top of the electrically controlled three-way valve (12). A return air pipe (14) is fixedly connected to the side end of the electrically controlled three-way valve (12). A three-way connector (15) is fixedly connected to the end of the return air pipe (14). One side of the three-way connector (15) is connected to the other end of the air inlet pipe (2). A guide pipe (16) is fixedly connected to the other end of the three-way connector (15).
3. The tail gas absorption device for chlorinated polyethylene production according to claim 2, characterized in that: A pH sensor (18) is fixedly installed on the inner wall of the recovery chamber (1), and a drain valve (19) is fixedly installed at the bottom of the recovery chamber (1).
4. The tail gas absorption device for chlorinated polyethylene production according to claim 3, characterized in that: A control panel (17) is fixedly installed on the side of the recycling bin (1). The control panel (17) is electrically connected to the pH sensor (18), the gas detector (10), the water pump (5), and the electrically controlled three-way valve (12).
5. The tail gas absorption device for chlorinated polyethylene production according to claim 1, characterized in that: A liquid filling pipe (21) is fixedly sleeved on the side of the top of the recovery bin (1), and a plug (22) is threaded onto the liquid filling pipe (21).
6. The tail gas absorption device for chlorinated polyethylene production according to claim 1, characterized in that: The bottom surface of the recycling bin (1) is fixedly connected with multiple support legs (20).