A high-temperature and high-pressure post-pyrolysis high-solid-content slurry separation and decompression device and method

Abstract

A device and method for separating and depressurizing high-solids-content slurry after high-temperature and high-pressure pyrolysis, comprising a hot high-pressure separator, wherein the discharge of the hot high-pressure separator is divided into two systems, A and B. System A includes a venting and depressurization tank A; System B includes a venting and depressurization tank B. A level gauge is installed on the side of the hot high-pressure separator to indicate the material level in the separator. The bottom of the hot high-pressure separator is connected to the top of both venting and depressurization tanks A and B. The bottom of both venting and depressurization tanks A and B is connected to the top of a hot high-solids product collection tank. The top of both venting and depressurization tanks A and B is connected to a venting condenser of the venting system. The gas generated by the hot high-pressure separator is cooled by a cooler and then enters a cold high-pressure separator. The bottom of the cold high-pressure separator is connected to a light component system. This invention satisfies the gas-liquid separation and discharge of high-solids-content slurry under high temperature and high pressure. This invention features a simple process, high degree of automation, large pressure drop, safe and stable operation, and low energy consumption.

Description

Technical Field

[0001] This invention relates to the field of separation technology of high-solids-content slurry and gas after high-temperature and high-pressure pyrolysis, specifically to a depressurization device and method for separating high-solids-content slurry after high-temperature and high-pressure pyrolysis. Background Technology

[0002] Desuperheating and pressure reduction systems are widely used in industries such as power generation, textiles, pharmaceuticals, and petrochemicals. Particularly in the chemical industry, in hydrogenation technologies such as fluidized bed and emulsified bed coal-oil co-refining and direct coal liquefaction, they address the challenges of pressure reduction, control difficulties, and wear and tear on pressure-reducing valves and pipelines after separating high-temperature, high-pressure, high-solids-content slurries from gases.

[0003] Currently, for depressurization of high-solids-content slurry mixtures, most high-pressure vessels employ angle valves and orifice plates to limit flow and reduce pressure. However, for high-solids-content liquids, this approach is prone to clogging of the orifice plate and wear of the angle valve. In the combination of orifice plate and flow control valve, the orifice plate is also prone to clogging, and the flow control valve is prone to wear. After wear, it is difficult to control pressure and flow to achieve the desired flow restriction and pressure reduction effect. Both of these methods result in a high pressure differential, and high-solids slurry can easily cause wear on the valve body. The orifice plate is also prone to clogging, leading to frequent and difficult repairs, short valve replacement cycles, high material requirements, and short process cycle operation. These methods cannot meet the reliability and safety requirements of some demanding high-solids-content, high-temperature, and high-pressure slurry separation and drainage processes. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the purpose of this invention is to provide a high-temperature and high-pressure pyrolysis high-solids-content slurry separation and decompression device and method, which meets the requirements of gas-liquid separation and discharge of high-solids-content slurry under high temperature and high pressure. This invention has the characteristics of simple process, high degree of automation, large pressure drop, safe and stable operation, and low energy consumption.

[0005] To achieve the above objectives, the technical solution adopted by the present invention is as follows:

[0006] A high-temperature and high-pressure pyrolysis high-solids-content slurry separation and depressurization device includes a thermal high-pressure separator. The discharge of the thermal high-pressure separator is divided into two systems, A and B. System A includes a venting and depressurization tank A; System B includes a venting and depressurization tank B.

[0007] A level gauge is installed on the central shaft of the side of the hot high pressure separator. The level gauge is used to measure the material level in the hot high pressure separator. The bottom of the hot high pressure separator is connected to the top of the venting and depressurization tank A and the top of the venting and depressurization tank B respectively. The bottom of the venting and depressurization tank A and the bottom of the venting and depressurization tank B are connected to the top of the hot high pressure product collection tank. The top of the venting and depressurization tank A and the top of the venting and depressurization tank B are connected to the venting condenser of the venting system.

[0008] The gas generated by the hot high-pressure separator is cooled by a cooler and then enters the cold high-pressure separator, which is equipped with a liquid settling pipe. The bottom of the cold high-pressure separator is connected to the light component system.

[0009] The top of the vent condenser is vented to the venting system, and the condensed liquid at the bottom is connected to the high-temperature product collection tank through flow regulating valve seven and check valve one.

[0010] The hot high-pressure separator discharge is divided into two systems, A and B. System A includes: venting and depressurizing tank A, flow limiting orifice plate one, flow regulating valve two, flow regulating valve four, shut-off valve one, and shut-off valve three. System B includes: venting and depressurizing tank B, flow limiting orifice plate two, flow regulating valve three, flow regulating valve five, shut-off valve two, and shut-off valve four.

[0011] Venting and depressurizing tanks A and B are equipped with downcomers; a shut-off valve three is installed between venting and depressurizing tank A and the hot high-performance product collection tank, and a shut-off valve four is installed between venting and depressurizing tank B and the hot high-performance product collection tank.

[0012] A flow-limiting orifice plate with a smaller orifice diameter and a flow regulating valve with a smaller orifice diameter are installed between venting pressure reducing tank A and venting condenser; a flow-limiting orifice plate with a smaller orifice diameter and a flow regulating valve with a smaller orifice diameter are installed between venting pressure reducing tank B and venting condenser; the two paths are connected to the venting condenser after they merge.

[0013] The top of the venting and depressurization tank A and the venting and depressurization tank B are respectively equipped with flow regulating valve four and flow regulating valve five in the middle of the connection between them and the valves of the rear system.

[0014] The top of the cold high-pressure separator is connected to the venting regulating valve and the venting regulating valve of the venting system.

[0015] A reduced-diameter flow-limiting orifice plate and a flow regulating valve are installed between the bottom of the cold high-pressure separator and the light component system.

[0016] The hot high-pressure separator discharge consists of two systems. When system A completes the discharge, system B meets the discharge conditions and the discharge program is switched between them.

[0017] The drainage of the hot high-pressure separator consists of two systems: system A performs the drainage, and system B is in standby mode.

[0018] The liquid level in the high-pressure separator is determined by the level gauge. A percentage point is set, and the liquid discharge program is automatically executed when the liquid level reaches the set value. The liquid discharge program is turned off when the liquid level reaches a low value.

[0019] The A / B system pressurization uses gas separated by a cold high-pressure separator. The gas from the A / B venting tank is discharged to the low-pressure area of ​​the system to reduce energy consumption.

[0020] The venting system is equipped with a venting condenser, which cools the light components in the gas and collects them into the thermal high-molecular products.

[0021] The light component in the cold high-pressure separator is controlled by both flow limiting and regulating valves, and enters the light component system after pressure reduction; the system's pressurization, balancing, and discharge are all completed by the automatic control system.

[0022] A method for using a high-temperature, high-pressure pyrolysis high-solids-content slurry separation and depressurization device includes the following steps;

[0023] When the liquid level of the thermal high-pressure separator 1 reaches the set liquid level value, the A and B systems are selected alternately or in a one-on-one standby liquid discharge procedure.

[0024] Select the alternating drainage procedure for systems A and B; Drainage process for the hot high-pressure separator: System A is pressurized to system pressure, valve status of system A: shut-off valve 1 and shut-off valve 3 are closed, flow regulating valve 2 and flow regulating valve 4 are closed; System B is pressurized to system pressure, valve status of system B: shut-off valve 2 and shut-off valve 4 are closed, flow regulating valve 3 and flow regulating valve 5 are closed; When the liquid level in the hot high-pressure separator reaches the point where system A triggers the drainage condition, shut-off valve 1 opens, and the hot high-pressure separator begins drainage. Drainage stops when the hot high-pressure separator reaches the low material level, shut-off valve 1 closes (drainage of the hot high-pressure separator switches to system B), flow regulating valve 2 opens, and pressure relief tank A8 is depressurized to low pressure; flow regulating valve 2 closes, shut-off valve 3 opens, and pressure relief tank A drains to the hot high-pressure product collection tank. After pressure relief tank A is emptied, shut-off valve... Three valves are closed, flow regulating valve four is opened, venting pressure tank A is pressurized to the system pressure, flow regulating valve four is closed, and system A reaches the initial condition for hot high pressure separator discharge; when the liquid level of hot high pressure separator reaches the level of system B, the discharge condition is triggered, shut-off valve two is opened, and hot high pressure separator begins to discharge; when hot high pressure separator discharges to the low material level or venting pressure tank B9 reaches the high material level, the discharge stop condition is triggered, shut-off valve two is closed (hot high pressure separator discharge switches to system A), flow regulating valve three is opened, venting pressure tank B9 to release pressure to the low pressure, flow regulating valve three is closed, shut-off valve four is opened, venting pressure tank B discharges to hot high pressure product collection tank; after venting pressure tank B, shut-off valve four is closed, flow regulating valve five is opened, venting pressure tank B is pressurized to the system pressure, flow regulating valve five is closed, and system B reaches the initial condition for hot high pressure separator discharge;

[0025] When the liquid level in the hot high-pressure separator reaches the discharge condition, the discharge procedure of system A and system B, one open and one standby, is selected. The discharge process for hot high-pressure separator 1 is as follows: System A is pressurized to the system pressure; the valve status of system A is: shut-off valve 1 and shut-off valve 3 are closed, and flow regulating valve 2 and flow regulating valve 4 are closed. When the liquid level in the hot high-pressure separator reaches the level that triggers the discharge condition in system A, shut-off valve 1 opens, and the hot high-pressure separator begins to discharge. Discharge stops when the hot high-pressure separator reaches the low material level, and shut-off valve 1 closes. The hot high-pressure separator discharges continuously N times until the discharge level of the venting and depressurization tank A is reached. Then, flow regulating valve 2 opens, and the venting and depressurization tank A is depressurized to low pressure. Flow regulating valve 2 closes, shut-off valve 3 opens, and the venting and depressurization tank A discharges liquid into the hot high-pressure product collection tank. After the venting and depressurization tank A is emptied, shut-off valve 3 closes, flow regulating valve 4 opens, and the venting and depressurization tank A is pressurized to the system pressure. Flow regulating valve 4 closes, and system A reaches the initial discharge condition for the hot high-pressure separator.

[0026] The conditions for draining liquid from the open pressure tank A must be met: the hot high-pressure separator completes the draining process until the shut-off valve is closed, and the high liquid level set value of the pressure tank A is released.

[0027] The gas phase separated by hot high pressure is cooled into a gas-liquid mixture by a cooler and enters the cold high pressure separator through the internal settling pipe. The liquid separated at the bottom is depressurized by the flow limiting orifice plate and then flows to the light component system through the flow regulating valve.

[0028] The gas separated by the cold high-pressure separator passes through pressure regulating valve one. Part of it passes through pressure regulating valve two to the venting system for recovery or purification before being vented. The other part of the gas is pressurized to venting and depressurizing tanks A and B through pressure regulating valves.

[0029] The vented air from venting and depressurizing tanks A and B, cooled by the venting air cooler, is then discharged to the venting system for recovery or purification. The condensed liquid is collected in the high-temperature heat collection tank through the flow regulating valve.

[0030] The flow control valve mainly controls and maintains the operating pressure of the system. The pressure control valve three is mainly used to pressurize the venting and depressurization tanks A and B to ensure the control of their pressure and flow. The pressure control valve two is mainly used to limit the flow and reduce the pressure of the system venting air, and to maintain the pressure between the pressure control valve one and the pressure control valve two.

[0031] The liquid level in the thermal high-pressure separator reaches 30% of the set value for drainage. The set value can be set according to process requirements, and 30% is just an assumption.

[0032] Venting and depressurization tank A releases pressure to the lowest set value of 0.3 MPa, and its set value can be changed according to the pressure requirements of the gas venting system;

[0033] After the pressure is reduced to 0.15 MPa by the second pressure regulating valve, the gas goes to the gas treatment system. Its set value can be changed according to the pressure requirements of the gas venting system.

[0034] The beneficial effects of this invention are:

[0035] This invention provides a device and method for separating and reducing pressure on high-solids-content slurry after high-temperature and high-pressure pyrolysis. It overcomes the shortcomings of traditional pressure-reducing systems, such as complex structure, severe wear on valves and pipelines caused by high-solids-content slurry, easy clogging of flow-limiting orifice plates, frequent emergency repairs, high maintenance difficulty, short valve replacement cycles, high material requirements, and short process cycle operation. These limitations prevent the system from meeting the reliability and safety requirements of separating and draining high-solids-content, high-temperature, and high-pressure slurries. This invention overcomes the disadvantages of gas-liquid separation and discharge of high-solids-content slurries under high temperature and pressure, and offers advantages such as simple process, high degree of automation, wide process selectivity, large pressure drop, safe and stable operation, and low energy consumption.

[0036] The venting and depressurization system of this invention is a system composed of valve groups that integrates system pressure balancing, depressurization system pressurization, venting, and gas recovery. The high-pressure gas is recycled, reducing energy consumption.

[0037] The hot high-pressure separator of this invention consists of two systems for drainage. When system A completes the drainage process, system B meets the drainage conditions and automatically switches the drainage program between them. Alternatively, one system can be set up for drainage while the other serves as a backup system, allowing for flexible switching of drainage and ensuring the safe and reliable operation of the device.

[0038] The cold high-pressure separator of this invention uses a flow-limiting orifice plate and a flow regulating valve to reduce pressure before separating oil and water. It has a simple structure and a high degree of pressure reduction.

[0039] The venting and depressurization tank of this invention is equipped with a venting condenser, which cools and separates the light components in the gas and collects the liquid into the hot high-performance products, thereby reducing the load on the gas processing system and improving the liquid yield.

[0040] This device is equipped with settling pipes for all high-pressure separation equipment to enable rapid separation of gas and liquid, preventing gas from carrying liquid.

[0041] This invention provides a method for draining liquid under low pressure differential, reducing wear on valves and pipelines caused by solid-liquid mixtures during draining.

[0042] The drainage process of this invention is completed by an interlocking and automatic control system. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of the present invention.

[0044] High-pressure separator 1, level gauge 30, cold high-pressure separator 3, oil-water separator 4, acidic water tank 5, oil tank 6, venting and pressure-reducing tank A8, venting and pressure-reducing tank B9, venting condenser 7, hot high-performance product collection tank 10, cooler 2, flow-limiting orifice plate I 24, flow-limiting orifice plate II 25, flow-limiting orifice plate III 26, pressure regulating valve I 20, pressure regulating valve II 21, pressure regulating valve III 23, flow regulating valve I 22, flow regulating valve II 12, flow regulating valve III 13, flow regulating valve IV 15, flow regulating valve V 16, flow regulating valve VI 19, flow regulating valve VII 27, flow regulating valve VIII 31, shut-off valve I 11, shut-off valve II 14, shut-off valve III 17, shut-off valve IV 18, check valve I 28, check valve II 29. Detailed Implementation

[0045] The present invention will be further described in detail below with reference to the embodiments.

[0046] like Figure 1 As shown: Systems A and B circulate and drain liquid sequentially, which will be further explained in detail with reference to the present invention.

[0047] Example 1:

[0048] This embodiment provides a high-temperature, high-pressure pyrolysis high-solids-content slurry separation and depressurization device and method, including a high-pressure separator 1, a level gauge 30, a cold high-pressure separator 3, a light component system 4, a venting and depressurization tank A8, a venting and depressurization tank B9, a venting condenser 7, a hot high-solids product collection tank 10, a cooler 2, flow-limiting orifice plates 24, 25, and 26, pressure regulating valves 20, 21, and 23, flow regulating valves 22, 12, 13, 15, 16, 19, 27, and 31, shut-off valves 11, 14, 17, and 18, and check valves 28 and 29.

[0049] The high-pressure separator 1 operates at a pressure of 20 MPa and a temperature of 400℃. System A has been pressurized to the set pressure of 19.5 MPa. The initial state of System A is as follows: shut-off valve 11 and shut-off valve 37 are closed; regulating valve 12 and regulating valve 15 are closed. When the liquid level in high-pressure separator 1 reaches the discharge setpoint of 30%, system A is triggered to discharge. Shut-off valve 11 opens, and high-pressure separator 1 begins to discharge. Discharge stops when the high-pressure separator reaches the low material level setpoint of 10%, shut-off valve 11 closes, and the high-pressure separator completes discharge. (The high-pressure separator 1 discharge system automatically switches.) (To System B) Flow regulating valve 2 12 is opened, venting pressure tank A8 is depressurized to the low set value of 0.3 MPa, flow regulating valve 2 12 is closed, shut-off valve 3 17 is opened to drain liquid from venting pressure tank A8 to the thermal high-pressure product collection tank 10, the liquid level of venting pressure tank A8 is drained to the low liquid level set value of 0.10 seconds later, shut-off valve 3 17 is closed, flow regulating valve 4 15 is opened, venting pressure tank A8 is pressurized to the system pressure of 19.5 MPa, then flow regulating valve 4 15 is closed, and System A reaches the initial conditions for draining liquid from thermal high-pressure separator 1.

[0050] System B has completed pressurization to the set pressure of 19.5 MPa. The initial state of System B is as follows: shut-off valves 14 and 18 are closed; regulating valves 13 and 16 are closed. The liquid level in the hot high-pressure separator 1 reaches the discharge set value of 30%, triggering system B to discharge. Shut-off valve 14 opens, and hot high-pressure separator 1 begins discharging. Discharging stops when the hot high-pressure separator reaches the low material level set value of 10%, shut-off valve 14 closes, and the hot high-pressure separator completes discharging. (The hot high-pressure separator 1 discharge system automatically switches to system A.) (System) Flow regulating valve 313 is opened, the pressure relief tank A8 is depressurized to the low set value of 0.3 MPa, flow regulating valve 313 is closed, shut-off valve 418 is opened to drain the liquid from the pressure relief tank A8 to the thermal high-pressure product collection tank 10, the liquid level of the pressure relief tank A8 is drained to the low liquid level set value of 0.10 seconds later, shut-off valve 418 is closed, flow regulating valve 516 is opened, the pressure relief tank A8 is pressurized to the system pressure of 19.5 MPa, and then flow regulating valve 516 is closed. System B reaches the initial conditions for draining liquid from thermal high-pressure separator 1.

[0051] The cold high-pressure separator 3 is equipped with a liquid settling pipe. The gas generated by the hot high-pressure separator is cooled to 30-45℃ by the cooler 2 before entering the cold high-pressure separator 3. Part of the gas at the top of the cold high-pressure separator 3 is used to pressurize the liquid discharge system, and the other part is depressurized to 0.15 MPa through the pressure regulating valve 21 before going to the gas treatment system. The light component liquid at the bottom of the cold high-pressure separator 3 is depressurized to 0.3 MPa through the flow limiting orifice plate and the flow regulating valve 19 before going to the light component system 4.

[0052] The gas at the top of the vented condenser 7 is depressurized to 0.15 MPa through flow regulating valve 22 and then goes to the gas treatment system. The liquid condensed at the bottom goes to the thermal high-performance product collection tank 10 through flow regulating valve 27 and check valve 28.

[0053] Example 2

[0054] System A circulates and drains the liquid, while System B is on standby. The invention will now be described in further detail.

[0055] This embodiment provides a high-temperature, high-pressure pyrolysis high-solids-content slurry separation and depressurization device and method, including a high-pressure separator 1, a level gauge 30, a cold high-pressure separator 3, a light component system 4, a venting and depressurization tank A8, a venting and depressurization tank B9, a venting condenser 7, a hot high-solids product collection tank 10, a cooler 2, flow-limiting orifice plates 24, 25, and 26, pressure regulating valves 20, 21, and 23, flow regulating valves 22, 12, 13, 15, 16, 19, 27, and 31, shut-off valves 11, 14, 17, and 18, and check valves 28 and 29.

[0056] The pressure of the hot high-pressure separator 1 is 20 MPa, and the temperature is 400℃. System A has been pressurized to the set pressure of 19.5 MPa. The initial state of system A is: shut-off valves 11 and 17 are closed, and regulating valves 12 and 15 are closed. When the liquid level of the hot high-pressure separator 1 reaches 30% of the discharge set value, the system A is triggered to discharge. Shut-off valve 11 opens, and the hot high-pressure separator 1 begins to discharge. The hot high-pressure separator stops discharging when the liquid level reaches 10% of the low material level set value, and shut-off valve 11 closes. The hot high-pressure separator has completed three consecutive discharges. When the liquid level of the venting and depressurization tank A8 is higher than the high-pressure tank A8 high-report set value by 50%, the venting and depressurization tank A8 discharge procedure is started. Flow regulating valve 212 opens, venting pressure tank A8 is depressurized to the low set value of 0.3 MPa, flow regulating valve 212 closes, shut-off valve 317 opens, venting pressure tank A8 drains liquid to thermal high-pressure product collection tank 10, venting pressure tank A8 liquid level is drained to the low liquid level set value of 0.10 seconds, shut-off valve 317 closes, flow regulating valve 415 opens, venting pressure tank A8 is pressurized to the system pressure of 19.5 MPa, flow regulating valve 415 closes, and system A reaches the initial conditions for draining liquid from thermal high-pressure separator 1.

[0057] The conditions for opening the pressure relief tank A8 to drain liquid must be met: the hot high pressure separator 1 completes the draining until the shut-off valve 11 is closed and the pressure relief tank A8 is released to the high liquid level set value.

[0058] The cold high-pressure separator 3 is equipped with a liquid settling pipe. The gas generated by the hot high-pressure separator is cooled to 30-45℃ by the cooler 2 before entering the cold high-pressure separator 3. Part of the gas at the top of the cold high-pressure separator 3 is used to pressurize the liquid discharge system, and the other part is depressurized to 0.15 MPa through the pressure regulating valve 21 before going to the gas treatment system. The light component liquid at the bottom of the cold high-pressure separator 3 is depressurized to 0.3 MPa through the flow limiting orifice plate and the flow regulating valve 19 before going to the light component system 4.

[0059] The gas at the top of the vented condenser 7 is depressurized to 0.15 MPa through flow regulating valve 22 and then goes to the gas treatment system. The liquid condensed at the bottom goes to the thermal high-performance product collection tank 10 through flow regulating valve 27 and check valve 28.

[0060] System B pressure is 19.5 MPa, meeting the initial conditions for draining liquid from the thermal high-pressure separator 1. When system A malfunctions, the draining system switches to system B.

Claims

1. A high-temperature, high-pressure pyrolysis high-solids-content slurry separation and depressurization device, characterized in that, It includes a hot high pressure separator (1), and the liquid discharge of the hot high pressure separator (1) is divided into two systems, A and B. System A includes a venting and depressurization tank A (8); System B includes a venting and depressurization tank B (9). A level gauge (30) is provided on the central shaft of the side of the hot high pressure separator (1). The level gauge (30) is used to measure the material level of the hot high pressure separator. The bottom of the hot high pressure separator (1) is connected to the top of the venting and depressurization tank A (8) and the venting and depressurization tank B (9) respectively. The bottom of the venting and depressurization tank A (8) and the venting and depressurization tank B (9) are connected to the top of the hot high pressure product collection tank (10). The top of the venting and depressurization tank A (8) and the venting and depressurization tank B (9) is connected to the venting condenser (7) of the venting system for depressurization. The gas generated by the hot high-pressure separator (1) is cooled by the cooler (2) and then enters the cold high-pressure separator (3). The cold high-pressure separator (3) is equipped with a liquid settling pipe. The bottom of the cold high-pressure separator (3) is connected to the light component system (4). The top of the vent condenser (7) is vented to the vent system, and the liquid condensed at the bottom is connected to the high-temperature product collection tank (10) through the flow regulating valve seven (27) and the one-way valve one (28). The hot high-pressure separator (1) has two drainage systems, A and B. System A includes: venting and depressurizing tank A (8), flow limiting orifice plate one (24), flow regulating valve two (12), flow regulating valve four (15), shut-off valve one (11) and shut-off valve three (17); System B includes: venting and depressurizing tank B (9), flow limiting orifice plate two (25), flow regulating valve three (13), flow regulating valve five (16), shut-off valve two (14) and shut-off valve four (18). The venting and depressurization tank A (8) and the venting and depressurization tank B (9) are equipped with downcomers; a shut-off valve three (17) is installed between the venting and depressurization tank A (8) and the hot high-performance product collection tank (10), and a shut-off valve four (18) is installed between the venting and depressurization tank B (9) and the hot high-performance product collection tank (10). A flow-limiting orifice plate with a smaller orifice diameter (24) and a flow regulating valve (12) are installed between the venting pressure reducing tank A (8) and the venting condenser (7). A flow-limiting orifice plate with a smaller orifice diameter (25) and a flow regulating valve (13) are installed between the venting pressure reducing tank B (9) and the venting condenser (7). The two paths are connected to the venting condenser (7) after they merge. The tops of the venting and depressurization tanks A (8) and B (9) are connected to the pressure regulating valve three (23), and the middle of the connection is respectively provided with the flow regulating valve four (15) and the flow regulating valve five (16); The top of the cold high-pressure separator (3) is connected to the pressure regulating valve one (20) and pressure regulating valve two (21) of the venting system; The bottom of the cold high-pressure separator (3) is provided with a three-hole plate (26) with a smaller aperture and a six-flow regulating valve (19) between the bottom of the separator (3) and the light component system (4). The hot high pressure separator (1) consists of two systems for draining liquid. When system A finishes draining liquid, system B reaches the draining condition and switches the draining program between them. The drainage of the hot high pressure separator (1) consists of two systems: system A performs the drainage and system B is in standby mode. The liquid level in the hot high pressure separator (1) is determined by the level gauge (30), a percentage point is set, and the liquid discharge program is automatically executed when the set value is reached. The liquid discharge program is turned off when the liquid level is low.

2. The high-temperature, high-pressure pyrolysis high-solids-content slurry separation and depressurization device according to claim 1, characterized in that, Both systems A and B are pressurized using gases separated by a cold high-pressure separator. The gases from both systems A and B are vented to the low-pressure zone of the system to reduce energy consumption. The venting system is equipped with a venting condenser (7) to cool the light components in the gas and collect them into the hot high-molecular products. The light component in the cold high-pressure separator (3) is controlled by both flow limiting and regulating valves. After pressure reduction, it enters the light component system. The system's pressurization, balancing, and discharge are all completed by the automatic control system.

3. A method of using a high-temperature, high-pressure pyrolysis high-solids-content slurry separation and depressurization device according to any one of claims 1 or 2, characterized in that, Includes the following steps; When the liquid level of the hot high pressure separator (1) reaches the set liquid level value for discharge, select the A and B systems alternately or one open and one standby discharge program. Select the alternating drainage procedure for systems A and B; for the drainage process of the hot high-pressure separator (1), system A is pressurized to the system pressure, and the valve status of system A is: shut-off valve 1 (11) and shut-off valve 3 (17) are closed, and flow regulating valve 2 (12) and flow regulating valve 4 (15) are closed; system B is pressurized to the system pressure, and the valve status of system B is: shut-off valve 2 (14) and shut-off valve 4 (18) are closed, and flow regulating valve 3 (13) and flow regulating valve 5 (16) are closed. Close; When the liquid level of the hot high pressure separator (1) reaches the level that triggers the discharge condition of system A, shut-off valve one (11) opens, and the hot high pressure separator (1) begins to discharge. When the hot high pressure separator (1) discharges to the low material level, it stops discharging. Shut-off valve one (11) closes, and flow regulating valve two (12) opens to release pressure from the pressure tank A (8) to the low pressure. Flow regulating valve two (12) closes, and shut-off valve three (17) opens to release pressure from the pressure tank A (8) to the hot high pressure product collection tank (10). After the pressure tank A (8) is emptied, shut-off valve three (17) closes, and flow regulating valve four (15) opens to pressurize the pressure tank A (8) to the system pressure. Flow regulating valve four (15) closes, and A The system reaches the initial condition for the hot high pressure separator (1) to discharge liquid; the liquid level of the hot high pressure separator (1) reaches the level of the B system to trigger the discharge condition, the shut-off valve two (14) opens, the hot high pressure separator (1) starts to discharge liquid, the hot high pressure separator discharges liquid to the low material level or the venting pressure tank B (9) reaches the high material level to trigger the stop discharge condition, the shut-off valve two (14) closes, the flow regulating valve three (13) opens the venting pressure tank B (9) to depressurize to the low pressure, the flow regulating valve three (13) closes, the shut-off valve four (18) opens the venting pressure tank B (9) to discharge liquid to the hot high pressure product collection tank (10), after the venting pressure tank B (9) is emptied, the shut-off valve four (18) closes, the flow regulating valve five (16) opens the venting pressure tank B (9) to pressurize to the system pressure, after the flow regulating valve five (16) closes, the B system reaches the initial condition for the hot high pressure separator (1) to discharge liquid; When the liquid level of the hot high pressure separator (1) reaches the discharge condition, the A and B systems are selected for one-on-one discharge procedure; the discharge process of the hot high pressure separator (1) is as follows: the A system is pressurized to the system pressure, and the valve status of the A system is as follows: shut-off valve 1 (11) and shut-off valve 3 (17) are closed, and flow regulating valve 2 (12) and flow regulating valve 4 (15) are closed; when the liquid level of the hot high pressure separator (1) reaches the discharge condition triggered by the A system, shut-off valve 1 (11) is opened, and the hot high pressure separator (1) starts to discharge. When the hot high pressure separator discharges to the low material level, it stops discharging, and shut-off valve 1 (11) is closed; the hot high pressure separator... After the separator (1) continuously drains liquid N times until the liquid level of the venting and depressurizing tank A (8) is set, the flow regulating valve 2 (12) is opened to depressurize the venting and depressurizing tank A (8) to low pressure; the flow regulating valve 2 (12) is closed, the shut-off valve 3 (17) is opened to drain the venting and depressurizing tank A (8) to the hot high-pressure product collection tank (10); after the venting and depressurizing tank A (8) is emptied, the shut-off valve 3 (17) is closed, the flow regulating valve 4 (15) is opened, the venting and depressurizing tank A (8) is pressurized to the system pressure, the flow regulating valve 4 (15) is closed, and the A system reaches the initial conditions for the hot high-pressure separator (1) to drain liquid.

4. The method of using the high-temperature and high-pressure pyrolysis high-solids-content slurry separation and depressurization device according to claim 3, characterized in that, The discharge conditions of the open pressure tank A (8) must meet the following: the hot high pressure separator (1) completes the discharge to the shut-off valve (11) and the high liquid level setting value of the pressure tank A (8) is vented; The gas phase separated by hot high pressure is cooled into a gas-liquid mixture by the cooler (2) and enters the cold high pressure separator (3) through the internal settling tube. The liquid separated at the bottom is depressurized by the flow limiting orifice plate three (26) and then flows to the light component system (4) through the flow regulating valve six (19). The gas separated by the cold high-pressure separator passes through pressure regulating valve one (20), and part of it passes through pressure regulating valve two (21) to the venting system for recovery or purification before being vented; the other part of the gas is pressurized by the pressure regulating valve to venting pressure reduction tank A (8) and venting pressure reduction tank B (9); After the venting condenser (7) cools the venting pressure reducing tank A (8) and venting pressure reducing tank B (9), the venting gas is cooled and then discharged to the venting system for recovery or purification. The condensed liquid is collected in the high-temperature heat collection tank (10) through the flow regulating valve. Pressure regulating valve one (20) controls and maintains the operating pressure of the system. Pressure regulating valve three (23) is used to pressurize venting and depressurizing tanks A (8) and B (9) to ensure the control of their pressure and flow. Pressure regulating valve two (21) is used to limit the flow and reduce the pressure of the system venting air and maintain the pressure between pressure regulating valve one (20) and pressure regulating valve two (21).

5. The method of using the high-temperature and high-pressure pyrolysis high-solids-content slurry separation and depressurization device according to claim 3, characterized in that, The liquid level of the thermal high-pressure separator (1) reaches 30% of the set value for drainage. The set value can be set according to process requirements. 30% is just an assumption. The venting and depressurization tank A (8) is depressurized to the low set value of 0.3 MPa, and its set value can be changed according to the pressure requirements of the gas venting system; Pressure regulating valve 2 (21) reduces the pressure to 0.15 MPa and then goes to the gas treatment system. Its set value can be changed according to the pressure requirements of the gas venting system.

Images