Closed silicone contact mass discharge system

Abstract

The utility model provides a kind of for closed organosilicon contact body discharge system, its technical scheme is: including contact body jar, the top of contact body jar is connected with the bottom of powder tank by pipeline, the top vent pipe of powder tank is connected with the lateral wall of vent filter, the top vent pipe of vent filter is connected to the feed inlet of water scrubbing tower, the vent pipe of the top of contact body jar is connected with the vent pipe of powder tank in parallel.The utility model has the beneficial effects that: (1) eliminate potential safety hazard, guarantee the safety of discharge process;(2) reduce environmental pollution, meet environmental protection requirement;(3) optimize processing flow, improve operation convenience.

Description

Technical Field

[0001] This utility model belongs to the field of organosilicon monomer production, and in particular relates to a closed organosilicon catalyst discharge system. Background Technology

[0002] In the industrial production of methylchlorosilane monomers, fluidized bed reactors often produce carbon deposits due to side reactions or localized cracking. A portion of this carbon enters the scrubbing tower, while another portion, along with silicon and copper powder, forms contact material, which needs to be periodically discharged from the system. Because the contact material contains ultrafine silicon, copper, and zinc powder, the industry typically uses large amounts of water to deactivate the contact material before discharge into containers. However, during actual discharge, the zinc powder reacts with water to produce hydrogen gas, and the high temperature of the contact material can generate open flames upon heating, posing a significant safety risk. This patent, through its unique closed-loop contact material discharge system, effectively ensures that the contact material no longer comes into contact with water or air, guaranteeing a safe and controllable discharge process. Summary of the Invention

[0003] To address the problem of open flames easily generated during the processing of silicone contact materials in the prior art, this utility model provides a closed silicone contact material discharge system. The technical solution includes a contact material tank, the top of which is connected to the bottom of a powder tank via a pipe. The top vent pipe of the powder tank is connected to the side wall of a vent filter, and the top vent pipe of the vent filter is connected to the inlet of a water washing tower. The vent pipe at the top of the contact material tank and the vent pipe of the powder tank are connected in parallel.

[0004] In a preferred embodiment, the contact tank is placed on a weighbridge to monitor the weight of the contact material inside the tank.

[0005] In a preferred embodiment, the bottom of the vent filter is connected to the top of the powder tank via a pipe.

[0006] In a preferred embodiment, the powder tank is equipped with a weighing instrument under the equipment lug and a second thermometer at the bottom.

[0007] In a preferred embodiment, the contact tank is equipped with a first thermometer and a pressure gauge.

[0008] In a preferred embodiment, the vent pipe of the contact tank is sequentially equipped with a temperature remote transmission valve and a third control valve along the gas flow direction. A safety valve is also connected in parallel on the vent pipe, and the other end of the safety valve is connected to the feed inlet of the water washing tower.

[0009] In a preferred embodiment, the temperature remote transmission is interlocked with the third control valve, and the third control valve is closed when the temperature monitored by the temperature remote transmission exceeds the set temperature.

[0010] In a preferred embodiment, a first control valve is provided on the pipe connecting the top of the contact tank and the bottom of the powder tank. The first control valve is also interlocked with the temperature remote transmission. When the temperature monitored by the temperature remote transmission exceeds the set temperature, the first control valve is closed.

[0011] In a preferred embodiment, a second control valve is provided on the vent pipe at the top of the powder tank.

[0012] In a preferred embodiment, a fourth control valve is provided on the vent pipe at the top of the vent filter.

[0013] The beneficial effects of this utility model are:

[0014] (1) The fully enclosed system design is adopted. The contact tank, powder tank and connecting pipes form a closed space. The contact does not come into contact with water or air throughout the process, thus avoiding the risk of zinc powder generating hydrogen when it comes into contact with water and the risk of high-temperature contact igniting open flame when it comes into contact with air. This completely solves the safety problems of traditional wet deactivation process.

[0015] Multiple safety interlock controls are implemented, with remote temperature transmission interlocked with the third control valve. When the temperature inside the contact tank exceeds the set value (e.g., 80℃), the third control valve automatically closes to block gas flow. The parallel safety valve can automatically activate when the system is overpressured (e.g., pressure ≥ 0.2MPa), diverting the excessive gas into the water scrubbing tower for treatment. This dual protection avoids the risk of explosion or combustion caused by system over-temperature and over-pressure.

[0016] (2) Gas closed-loop treatment: the volatile gases (such as trace amounts of organosilicon monomers and dust) generated during the contact body emission process are filtered by the vent filter and then enter the water washing tower for purification treatment through the vent pipe to avoid direct emission and air pollution; the gas when the safety valve is activated is also introduced into the water washing tower to ensure that no excessive gas leaks out.

[0017] Avoiding wet pollution, eliminating the need for large amounts of water for contact deactivation, reducing the generation of wastewater containing heavy metals (copper, zinc, etc.), and lowering wastewater treatment costs and environmental risks.

[0018] (3) The contact tank collects the contact in a quantitative manner, and the weighbridge monitors the weight of the contact in real time. After it is full, it can be directly sealed and transported to an external unit for professional treatment without the need for on-site opening or secondary transfer, which reduces the risk of contact exposure and simplifies the on-site operation process. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0020] In the diagram: 1. Contact tank; 2. Weighbridge; 3. Powder tank; 4. Vent filter; 5. Safety valve; 6. Water washing tower; 7. Weighing instrument; 8. First thermometer; 9. Pressure gauge; 10. Temperature remote transmission; 11. First control valve; 12. Second control valve; 13. Third control valve; 14. Fourth control valve; 15. Second thermometer. Detailed Implementation

[0021] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0022] Example

[0023] like Figure 1 The closed organosilicon catalyst discharge system shown includes a catalyst tank 1, the top of which is connected to the bottom of a powder tank 3 via a pipe. The top vent pipe of the powder tank 3 is connected to the side wall of a vent filter 4, and the top vent pipe of the vent filter 4 is connected to the inlet of a water washing tower 6. The vent pipe at the top of the catalyst tank 1 is connected in parallel with the vent pipe of the powder tank 3.

[0024] The powder tank 3 transports the contact material to the contact material tank 1 via a pneumatic conveying device (such as a silo pump in the prior art; pneumatic conveying is not an innovation of this case and will not be described in detail). The gas used for transport in the powder tank 3 enters the vent filter 4 through the vent pipe at the top for dust removal. The remaining dust-free gas enters the water washing tower 6 for water washing. At the same time, there is also some gas used for transport in the contact material tank 1, which also enters the vent filter 4 through the vent pipe at the top of the contact material tank 1 for treatment. The subsequent dust-free gas also enters the water washing tower 6 for water washing.

[0025] Furthermore, the contact tank 1 is placed on the weighbridge 2 to monitor the weight of the contact inside the contact tank 1.

[0026] Weighbridge 2 monitors the weight of the contact material in contact tank 1 in real time. Once the weight for sealing the tank is reached, contact tank 1 can be sealed and transferred to an external unit for harmless treatment.

[0027] Furthermore, the bottom of the vent filter 4 is connected to the top of the powder tank 3 via a pipe.

[0028] The vent filter 4 filters out the dust that enters with the gas and returns it to the powder tank 3, preventing dust from entering the water washing tower 6 and causing a safety accident.

[0029] Furthermore, the powder tank 3 is equipped with a weighing instrument 7 under the equipment lug and a second thermometer 15 at the bottom.

[0030] The weighing instrument 7 monitors the dust content in the powder tank 3 in real time, while the second thermometer 15 at the bottom of the powder tank 3 monitors the contact temperature. Only when the temperature is below 50°C can the powder be discharged into the contact tank 1. The second thermometer 15 is a thermocouple thermometer equipped with a wear-resistant sleeve.

[0031] Furthermore, the contact tank 1 is equipped with a first thermometer 8 and a pressure gauge 9.

[0032] The first thermometer 8 monitors the contact body temperature in real time to prevent safety accidents caused by excessive contact body temperature. The pressure gauge 9 also monitors the pressure of the contact body tank 1 in real time to prevent overpressure.

[0033] Furthermore, the vent pipe of the contact tank 1 is sequentially equipped with a temperature remote transmission 10 and a third control valve 13 along the gas flow direction. A safety valve 5 is also connected in parallel on the vent pipe, and the other end of the safety valve 5 is connected to the feed port of the water washing tower 6.

[0034] Safety valve 5 is used to automatically discharge excess gas into water washing tower 6 for water washing when overpressure occurs.

[0035] Furthermore, the temperature remote sensor 10 is interlocked with the third control valve 13. When the temperature monitored by the temperature remote sensor 10 exceeds the set temperature (e.g., 80°C), the third control valve 13 is closed to prevent high-temperature gas from entering the vent filter 4.

[0036] Furthermore, a first control valve 11 is provided on the pipe connecting the top of the contact tank 1 and the bottom of the powder tank 3. The first control valve 11 is also interlocked with the temperature remote transmission 10. When the temperature monitored by the temperature remote transmission 10 exceeds the set temperature, the first control valve 11 is closed.

[0037] The first control valve 11 can be opened to discharge the material when the dust temperature in the powder tank 3 drops to 50°C; when the temperature exceeds 80°C, the first control valve 11 is closed to stop feeding.

[0038] Furthermore, a second control valve 12 is provided on the vent pipe at the top of the powder tank 3.

[0039] Furthermore, a fourth control valve 14 is provided on the vent pipe at the top of the vent filter 4.

[0040] The operation process of the above system is as follows: open the second control valve 12 and the fourth control valve 14 to establish a gas discharge channel; confirm that the first thermometer 8 and pressure gauge 9 of the contact tank 1 are normal.

[0041] Open the first control valve 11, and the catalyst (containing silicon powder, copper powder, zinc powder, etc.) discharged from the fluidized bed reactor enters the catalyst tank 1 through the pipeline;

[0042] Weighbridge 2 monitors the weight of the tank in real time. When the set full weight is reached, the staff will seal the tank.

[0043] During the process of contacting the substance, trace amounts of gases volatilized inside the container (such as unreacted monomers and dust) are emitted through two pathways:

[0044] (1) Part of the gas passes through the vent pipe at the top of the contact tank → the third control valve 13 → the side wall of the vent filter 4 → the top of the vent filter → the fourth control valve 14 → the water washing tower 6 for purification.

[0045] (2) Some of the gas flows through the airflow in the powder tank through the vent pipe at the top of the powder tank → the second control valve 12 → the side wall of the vent filter 4 → and enters the water washing tower along the same path.

[0046] The vent filter 4 filters the gas and traps dust particles. The filtered powder flows back to the powder tank 3 through the bottom pipe, realizing powder recovery.

[0047] The temperature remote transmission 10 monitors the gas temperature in the vent pipe of the contact tank in real time. If it exceeds the set value, it immediately interlocks and closes the first control valve 11 and the third control valve 13 to block the gas flow in this path. At the same time, the system alarms to prompt the staff to cool down the contact tank 1.

[0048] Pressure gauge 9 monitors the pressure inside the contact tank. If the pressure exceeds the preset value, safety valve 5 will automatically open and directly introduce the overpressure gas into water washing tower 6 to prevent the system from overpressure.

[0049] Upon receiving the full signal from weighbridge 2, close the first control valve 11 to stop the contact body from entering;

[0050] Close the third control valve 13 and the second control valve 12 to cut off the gas emission path and keep the contact tank and powder tank sealed.

Claims

1. A closed organosilicon catalyst discharge system, characterized in that, The device includes a contact tank (1), the top of which is connected to the bottom of a powder tank (3) via a pipe. The top vent pipe of the powder tank (3) is connected to the side wall of a vent filter (4), and the top vent pipe of the vent filter (4) is connected to the inlet of a water washing tower (6). The vent pipe at the top of the contact tank (1) is connected in parallel with the vent pipe of the powder tank (3).

2. The closed organosilicon catalyst emission system according to claim 1, characterized in that, The contact tank (1) is placed on the weighbridge (2) to monitor the weight of the contact inside the contact tank (1).

3. The closed organosilicon catalyst emission system according to claim 1, characterized in that, The bottom of the vent filter (4) is connected to the top of the powder tank (3) via a pipe.

4. The closed organosilicon catalyst emission system according to claim 1, characterized in that, The powder tank (3) is equipped with a weighing instrument (7) under the equipment lug and a second thermometer (15) at the bottom.

5. The closed organosilicon catalyst emission system according to claim 1, characterized in that, The contact tank (1) is equipped with a first thermometer (8) and a pressure gauge (9).

6. The closed organosilicon catalyst discharge system according to claim 1, characterized in that, The vent pipe of the contact tank (1) is provided with a temperature remote transmission (10) and a third control valve (13) in sequence along the gas flow direction. A safety valve (5) is also connected in parallel on the vent pipe. The other end of the safety valve (5) is connected to the feed port of the water washing tower (6).

7. The hermetically sealed organosilicon catalyst emission system according to claim 6, characterized in that, The temperature remote transmitter (10) is interlocked with the third control valve (13). When the temperature monitored by the temperature remote transmitter (10) exceeds the set temperature, the third control valve (13) is closed.

8. The hermetically sealed organosilicon catalyst emission system according to claim 6, characterized in that, The pipe connecting the top of the contact tank (1) and the bottom of the powder tank (3) is equipped with a first control valve (11). The first control valve (11) is also interlocked with the temperature remote transmission (10). When the temperature monitored by the temperature remote transmission (10) exceeds the set temperature, the first control valve (11) is closed.

9. The closed organosilicon catalyst emission system according to claim 1, characterized in that, The powder tank (3) is equipped with a second control valve (12) on the vent pipe at the top.

10. The hermetically sealed organosilicon catalyst discharge system according to claim 1, characterized in that, The vent pipe at the top of the vent filter (4) is equipped with a fourth control valve (14).

Images