Pressurized feeding system of polymerization kettle
By designing a pressurized feed system for polymerization kettle including parallel adjustment pipelines, the problem of excessive vibration of the compressor when switching raw material sources is solved, and the effect of reducing vibration and leakage risks is achieved, ensuring the safe operation of the system.
Patent Information
- Application Number
- CN202421530441.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-28
- Publication Date
- 2025-05-02
- Estimated Expiration
- 2034-06-28
AI Technical Summary
When the existing polymer kettle pressurized feed system switches the mixed raw material source, the pressure difference at both ends of the compressor changes greatly, resulting in excessive vibration of the compressor, which easily leads to leakage, and has serious safety hazards.
A pressurized feeding system including a first filling groove, a second filling groove, a circulating compressor and a buffer tank is designed. By connecting the first adjustment pipeline and the second adjustment pipeline in parallel, the raw material is pre-returned to the second filling groove, adjust the pressure difference between the two sides of the compressor, and reduce vibration.
It effectively reduces vibration of the circulating compressor, reduces leakage risk, ensures safe operation of the system, and reduces maintenance costs.
Smart Images
Figure CN222816792U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of chemical industry, in particular to a pressurized feeding system of a polymerization kettle. Background Art
[0002] Chemical companies use tetrafluoroethylene and hexafluoropropylene copolymerization to obtain FEP. The mixed raw materials are pressurized by a compressor, sent to a buffer tank, filtered, and sent to a polymerization kettle for polymerization.
[0003] Usually, there are two feeding tanks for providing mixed raw materials to the compressor, which are controlled by a two-position valve. During the valve switching process, the pressure difference between the inlet and outlet of the compressor varies greatly, causing the compressor to vibrate excessively, which can easily cause leakage at the welds of the compressor inlet and outlet pipelines and loose bolts at the flange connections. Since the raw gas is flammable and explosive in the air, it poses a serious safety hazard.
[0004] Therefore, how to design a polymerizer pressurized feeding system that reduces the vibration of the supplementary compressor and operates safely is a problem that needs to be solved urgently by those skilled in the art. Summary of the invention
[0005] The purpose of the utility model is to provide a pressurized feeding system for a polymerization kettle in view of the deficiencies in the prior art, which has a simple structure and low maintenance cost, can effectively reduce the pressure difference at both ends of the compressor when switching the mixed raw material source, improve the vibration of the compressor, and ensure safe operation.
[0006] The technical scheme of the utility model is: a pressurized feeding system for a polymerization kettle, comprising a first feeding tank, a second feeding tank, a circulating compressor, and a buffer tank, wherein the outlet of each feeding tank is provided with a first valve, and the outlets of the first feeding tank and the second feeding tank are connected in parallel to the inlet of the circulating compressor, and further comprising a first regulating pipeline and a second regulating pipeline, wherein the buffer tank is connected to the outlet of the circulating compressor through the first pipeline, and the buffer tank feeds the polymerization kettle through the second pipeline, wherein a first filter and a second valve are provided on the second pipeline, and the second valve is located downstream of the first filter, wherein the upstream end of the first regulating pipeline is connected to the buffer tank, and the downstream end is connected to the second feeding tank, wherein a first regulating valve is provided on the first regulating pipeline, and the upstream end of the second regulating pipeline is connected to the second pipeline, and is located between the first filter and the second valve, and wherein a second regulating valve is provided on the second regulating pipeline.
[0007] A third pipeline is arranged at the inlet of the circulation compressor, a third regulating valve and a second filter are arranged on the third pipeline, and the second filter is located downstream of the third regulating valve. The outlets of the first supplementary tank and the second supplementary tank are connected in parallel at the upstream end of the third pipeline.
[0008] The second pipeline and the first regulating pipeline are both connected to the top of the buffer tank, and the first pipeline is connected to the middle of the side wall of the buffer tank.
[0009] The third pipeline is provided with a pressure gauge, which is located downstream of the second filter.
[0010] The above technical solution has the following beneficial effects:
[0011] 1. The pressurized feeding system of the polymerization kettle includes a first feeding tank, a second feeding tank, a circulating compressor, and a buffer tank, wherein the first feeding tank and the second feeding tank are used to alternately feed the polymerization kettle, the circulating compressor is used to pressurize the mixed raw materials to meet the requirements of the polymerization process, and the buffer tank is used to stabilize the flow. A first valve is provided at the outlet of each feeding tank, and the outlets of the first feeding tank and the second feeding tank are connected in parallel to the inlet of the circulating compressor. It also includes a first regulating pipeline and a second regulating pipeline, wherein the buffer tank is connected to the outlet of the circulating compressor through the first pipeline, and the buffer tank feeds the polymerization kettle through the second pipeline, wherein a first filter and a second valve are provided on the second pipeline, and the second valve is located downstream of the first filter, and the first filter is used to ensure the purity of the raw materials entering the polymerization kettle. The upstream end of the first regulating pipeline is connected to the buffer tank, and the downstream end is connected to the second feeding tank. A first regulating valve is arranged on the first regulating pipeline, and the upstream end of the second regulating pipeline is connected to the second pipeline, which is located between the filter and the second valve. A second regulating valve is arranged on the second regulating pipeline. When the first feeding tank and the second feeding tank need to switch the feeding, the first regulating valve and the second regulating valve are opened in advance to make part of the mixed raw materials in the buffer tank flow back to the second feeding tank through the first regulating pipeline and the second regulating pipeline, so as to reduce the pressure in the buffer tank, that is, reduce the pressure at the outlet of the circulating compressor, and at the same time increase the pressure of the mixed raw materials on the inlet side of the circulating compressor, effectively reduce the pressure difference on both sides of the circulating compressor, and thus reduce the vibration of the circulating compressor. In addition, the second regulating pipeline and the second regulating valve can also be used to adjust the pressure in the polymerization kettle to meet the actual production needs, and the whole system operates in a closed loop, which can also effectively avoid leakage.
[0012] 2. A third pipeline is set at the inlet of the circulation compressor, and a third regulating valve and a second filter are set on the third pipeline, and the second filter is located downstream of the third regulating valve. The outlets of the first replenishing tank and the second replenishing tank are connected in parallel at the upstream end of the third pipeline. The first regulating valve, the second regulating valve and the third regulating valve can be combined to accurately control the pressure difference on both sides of the circulation compressor to avoid severe vibration caused by excessive differential pressure changes, thereby ensuring normal operation of the circulation compressor.
[0013] 3. The second pipeline and the first regulating pipeline are both connected to the top of the buffer tank, and the first pipeline is connected to the middle of the side wall of the buffer tank to reduce the amount of impurities brought out by the second pipeline and the first regulating pipeline.
[0014] Further description is given below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 It is a connection diagram of the utility model.
[0016] In the accompanying drawings, 1 is the first replenishing tank, 2 is the second replenishing tank, 3 is the circulating compressor, 4 is the buffer tank, 5 is the first regulating pipeline, 6 is the second regulating pipeline, 7 is the first pipeline, 8 is the second pipeline, 9 is the first filter, 10 is the first regulating valve, 11 is the second regulating valve, 12 is the third pipeline, 13 is the third regulating valve, 14 is the second filter, 15 is the pressure gauge, a is the first valve, and b is the second valve. DETAILED DESCRIPTION
[0017] See also Figure 1 , is a specific embodiment of a pressurized feeding system of a polymerization kettle. The pressurized feeding system of the polymerization kettle includes a first feeding tank 1, a second feeding tank 2, a circulating compressor 3, and a buffer tank 4. The outlet of each feeding tank is provided with a first valve a. In this embodiment, the first valve is a two-position valve. The outlets of the first feeding tank 1 and the second feeding tank 2 are connected in parallel to the inlet of the circulating compressor 3. Specifically, the inlet of the circulating compressor 3 is provided with a third pipeline 12, and a third regulating valve 13 and a second filter 14 are provided on the third pipeline 12, and the second filter 14 is located downstream of the third regulating valve 13. A pressure gauge 15 is also provided on the third pipeline, which is located downstream of the second filter 14. The pressure gauge is electrically connected to the third regulating valve. The outlets of the first feeding tank 1 and the second feeding tank 2 are connected in parallel to the upstream end of the third pipeline 12, and are obviously located upstream of the third regulating valve. It also includes a first regulating pipeline 5 and a second regulating pipeline 6. The buffer tank 4 is connected to the outlet of the circulating compressor 3 through the first pipeline 7. Specifically, the downstream end of the first pipeline is connected to the middle of the side wall of the buffer tank. The buffer tank 4 supplies the polymerizer through the second pipeline 8. The second pipeline 8 is provided with a first filter 9 and a second valve b, and the second valve b is located downstream of the first filter 9. Specifically, the upstream end of the second pipeline is connected to the top of the buffer tank, and the second valve is a regulating valve. The upstream end of the first regulating pipeline 5 is connected to the buffer tank 4, and the downstream end is connected to the second replenishing tank 2. The first regulating pipeline is provided with a first regulating valve 10. Specifically, the upstream end of the first regulating pipeline is connected to the top of the buffer tank. The upstream end of the second regulating pipeline 6 is connected to the second pipeline 8, and is located between the first filter 9 and the second valve b. The second regulating pipeline 6 is provided with a second regulating valve 11.
[0018] The working principle of the utility model is: take the first supplementary slot feeding first, and then switch to the second supplementary slot feeding as an example:
[0019] Open the first valve on the first feeding tank, open the third control valve, open the second valve, and start the circulating compressor, so that the mixed raw materials in the first feeding tank are compressed, sent to the buffer tank for steady flow, and then sent to the polymerization kettle for polymerization reaction. If the circulating compressor vibrates severely, the first regulating valve and the second regulating valve can be opened to allow part of the compressed mixed raw materials to be sent to the second feeding tank, and the first valve on the second feeding tank is opened and the first valve on the first feeding tank is closed. This can not only continuously feed the materials, but also effectively reduce the pressure difference on both sides of the compressor, reduce the vibration of the circulating compressor, and ensure its safe operation.
Claims
1. A pressurized feeding system for a polymerization reactor, comprising a first feeding tank (1), a second feeding tank (2), a circulating compressor (3), and a buffer tank (4), wherein the outlet of each feeding tank is provided with a first valve (a), and the outlets of the first feeding tank (1) and the second feeding tank (2) are connected in parallel to the inlet of the circulating compressor (3), characterized in that: It also includes a first regulating pipeline (5) and a second regulating pipeline (6), The buffer tank (4) is connected to the outlet of the circulating compressor (3) through a first pipeline (7), and the buffer tank (4) supplies materials to the polymerization kettle through a second pipeline (8). A first filter (9) and a second valve (b) are arranged on the second pipeline (8), and the second valve (b) is located downstream of the first filter (9). The upstream end of the first regulating pipeline (5) is connected to the buffer tank (4), and the downstream end is connected to the second replenishing tank (2). A first regulating valve (10) is arranged on the first regulating pipeline. The upstream end of the second regulating pipeline (6) is connected to the second pipeline (8) and is located between the first filter (9) and the second valve (b). A second regulating valve (11) is arranged on the second regulating pipeline (6).
2. The pressurized feeding system of the polymerization reactor according to claim 1, characterized in that: A third pipeline (12) is arranged at the inlet of the circulation compressor (3), a third regulating valve (13) and a second filter (14) are arranged on the third pipeline (12), and the second filter (14) is located downstream of the third regulating valve (13), and the outlets of the first replenishing tank (1) and the second replenishing tank (2) are connected in parallel at the upstream end of the third pipeline (12).
3. The pressurized feeding system of the polymerization reactor according to claim 1, characterized in that: The second pipeline (8) and the first regulating pipeline (5) are both connected to the top of the buffer tank (4), and the first pipeline (7) is connected to the middle of the side wall of the buffer tank (4).
4. The pressurized feeding system of the polymerization reactor according to claim 2, characterized in that: A pressure gauge (15) is provided on the third pipeline (12) and is located downstream of the second filter (14).