A vinylidene fluoride exhaust gas pressure stabilizing buffer
By designing venting condensers, buffer tanks, and pressure stabilizing buffer devices for the incinerator, the problem of unstable gas flow in the vinylidene fluoride unit was solved, achieving stable delivery of incineration feed and environmental protection.
Patent Information
- Application Number
- CN202522210170.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-10-20
- Publication Date
- 2026-08-25
- Estimated Expiration
- 2035-10-20
AI Technical Summary
Unstable gas flow from the vinylidene fluoride (VDF) unit causes fluctuations in the incineration system, resulting in incomplete combustion and environmental pollution.
Design a pressure stabilizing and buffering device that includes a venting condenser, a buffer tank, and an incinerator. The pressure of the buffer tank is controlled by interlocking the No. 1 regulating valve with the pressure gauge, and the flow rate of the incinerator is controlled by interlocking the No. 2 regulating valve with the flow meter, so as to ensure stable delivery.
It achieves pressure stabilization and buffering of vinylidene fluoride emission gas, ensures stable incineration feed, reduces environmental pollution, and has a simple structure, low cost, and is easy to maintain.
Smart Images
Figure CN224680562U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of vinylidene fluoride synthesis, and specifically relates to a vinylidene fluoride emission gas pressure stabilization and buffer device. Background Technology
[0002] Using R142b as raw material, the gas is vaporized, preheated, and then cracked. The resulting high-temperature cracked gas is cooled, dusted, and washed with water to remove residual hydrogen chloride gas, yielding crude VDF. The crude product undergoes primary and secondary compression to remove moisture, followed by drying, liquefaction, and condensation. The crude VDF then enters the intermediate tank, where the liquid phase is self-pressurized to the distillation system. The uncondensed gas phase in the intermediate tank enters the incineration unit for combustion via the vent condenser. However, the unstable gas flow rate at the outlet of the vent condenser can easily cause fluctuations in the incineration system, resulting in incomplete combustion and environmental pollution. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a simple structure, low manufacturing cost, convenient use and easy maintenance of vinylidene fluoride emission gas pressure stabilization and buffer device to solve the problems of unstable emission gas flow of vinylidene fluoride device, which causes fluctuations in the incineration device system, incomplete combustion in the incinerator, and environmental pollution.
[0004] Therefore, the present invention adopts the following technical solution: A pressure stabilizing and buffering device for vinylidene fluoride (VDF) emission gas includes a vent condenser, a buffer tank, and an incinerator. The vent condenser is connected to the bottom of the buffer tank via an outlet pipe, and the buffer tank is connected to the incinerator via an outlet pipe. The inert gas from the vinylidene fluoride unit that has not been condensed by the vent condenser enters the buffer tank via the outlet pipe. After being buffered and stabilized, the gas enters the incinerator via the outlet pipe. The outlet pipe of the vent condenser is equipped with a No. 1 regulating valve; A pressure gauge is installed in the middle of the buffer tank; The buffer tank outlet pipe is equipped with a flow meter and a No. 2 regulating valve; A regulating valve (#1) is installed on the venting condenser outlet pipe, and a pressure gauge is installed on the buffer tank. The regulating valve (#1) and pressure gauge are interlocked and set to a pressure of 0.15 MPa to ensure stable pressure in the buffer tank. A flow meter and a regulating valve (#2) are installed on the buffer tank outlet pipe, with the flow rate set to 3 Nm³. 3 / h, the No. 2 regulating valve automatically adjusts the flow rate to ensure a stable pressure for incineration.
[0005] The advantages of this invention are: it has a simple structure, low manufacturing cost, is easy to use and maintain, and has a long service life. The pressure of the buffer tank is controlled by interlocking the No. 1 regulating valve with the pressure gauge, and the No. 2 regulating valve is interlocked with the flow meter to stabilize the incineration flow rate, ensuring stable incineration feed. It is widely used in the synthesis of vinylidene fluoride. Attached Figure Description
[0006] Figure 1 This is a schematic diagram of the system connection of this utility model; In the diagram: 1. Vent condenser; 2. Vent condenser outlet pipe; 3. No. 1 regulating valve; 4. Pressure gauge; 5. Buffer tank; 6. Buffer tank outlet pipe; 7. No. 2 regulating valve; 8. Flow meter; 9. Incinerator. Detailed Implementation
[0007] The present invention will be further described below with reference to the accompanying drawings and specific embodiments: like Figure 1 As shown, a pressure stabilizing and buffering device for vinylidene fluoride emission gas is provided, wherein the vent condenser 1 and the buffer tank 5 are connected through the vent condenser outlet pipe 2, and the buffer tank 5 is connected to the incinerator 9 through the buffer tank outlet pipe 6.
[0008] Pressure gauge 4 is installed on buffer tank 5, regulating valve 3 is installed on venting condenser outlet pipe 2, regulating valve 7 is installed on buffer tank outlet pipe 6, and flow meter 8 is installed on buffer tank outlet pipe 6.
[0009] The inert gas from the vinylidene fluoride unit passes through the vent condenser 1. The uncondensed exhaust gas then enters the buffer tank 5 through the vent condenser outlet pipe 2. After buffering and stabilizing the pressure in the buffer tank 5, the gas enters the incinerator 9 through the buffer tank outlet pipe 6 for incineration.
[0010] The vented air is collected and stabilized in buffer tank 5 to ensure stable delivery pressure. A regulating valve 3 (#1) is installed on the vented condenser outlet pipe 2, and a pressure gauge 4 is installed on buffer tank 5. The regulating valve 3 and pressure gauge 4 are interlocked and set to a pressure of 0.15 MPa to ensure stable pressure in buffer tank 5. A flow meter 7 and a regulating valve 8 (#2) are installed on the buffer tank outlet pipe 6, with the flow rate set to 3 Nm³. 3 / h, regulating valve 8 automatically adjusts the flow rate to ensure stable pressure delivery to incinerator 9.
Claims
1. A pressure stabilizing and buffering device for vinylidene fluoride (VDF) emission gas, characterized in that, Includes a venting condenser (1), a buffer tank (5), and an incinerator (9); The vent condenser (1) is connected to the bottom of the buffer tank (5) via the vent condenser outlet pipe (2), and the buffer tank (5) is connected to the incinerator (9) via the buffer tank outlet pipe (6). The inert gas from the vinylidene fluoride unit that has not been condensed by the vent condenser (1) enters the buffer tank (5) via the vent condenser outlet pipe (2). After the buffer tank (5) is buffered and stabilized, it enters the incinerator (9) via the buffer tank outlet pipe (6) for incineration. The outlet pipe (2) of the vent condenser is equipped with a No. 1 regulating valve (3); A pressure gauge (4) is provided in the middle of the buffer tank (5); A flow meter and a No. 2 regulating valve (7) are installed on the outlet pipe (6) of the buffer tank. The No. 1 regulating valve (3) is interlocked with the pressure gauge (4) to ensure the pressure of the buffer tank (5) is stable.