A pressure-compensated steam explosion device

Abstract

This invention discloses a pressure-compensated steam explosion device, comprising a steam explosion tank, a steam explosion tank support, a discharge box, a steam explosion tank, a feed box, a steam tank, and a steam generator. The steam tank and the steam generator are connected by pipelines, and the steam tank and the steam explosion tank are also connected by pipelines. A pressure sensor is installed on the steam explosion tank, and a steam explosion valve is installed at the connection point between the discharge box and the steam explosion tank. During the steam explosion process, the pressure sensor monitors the pressure changes within the steam explosion tank and controls the opening and closing states of the steam explosion valve and the pressure-compensating valve, allowing steam from the steam tank to fill the steam explosion tank, maintaining the pressure value of the steam explosion tank, and slowing down the depressurization rate of the steam explosion tank. The technical solution of this invention can provide pressure compensation during the steam explosion process, making the steam explosion more complete, the discharge from the steam explosion tank more thorough, and improving the efficiency of straw steam explosion.

Description

Technical Field

[0001] This invention belongs to the field of resource utilization of organic solid waste, and specifically relates to a pressure-compensated steam explosion device. Background Technology

[0002] Straw steam explosion is a promising pretreatment technology in the field of biomass conversion. This technology involves heating and pressurizing plant straw, allowing steam molecules to penetrate the plant tissue. After maintaining pressure for a certain period, the pressure is rapidly released and the temperature lowered. The steam molecules inside the straw explode instantaneously, converting the internal energy of the steam into mechanical energy, which acts on the intercellular layers of the biological tissue, thereby decomposing the straw raw material, for example, into lignin and cellulose. However, existing steam explosion devices depressurize too quickly, and the difference in the timing of straw explosions leads to varying pressure differentials during the explosion process, resulting in significant differences in the explosion effect. This causes some straw to be incompletely exploded and easily remain in the reaction vessel.

[0003] Patent CN102261005B discloses a steam explosion device with a dual-cylinder structure, comprising an explosion cylinder and a storage cylinder. During the explosion stage, the explosion cylinder's vent rapidly opens, releasing high-pressure steam and materials at high speed into atmospheric pressure, generating an explosion reaction and completing the biomass explosion treatment. The storage cylinder's exhaust begins the instant the explosion cylinder's vent rapidly opens; gas from the storage cylinder is injected back into the explosion cylinder through a nozzle, propelling the materials to accelerate out of the vent and completely removing any remaining material from the steam explosion cylinder, thereby increasing the material release speed and improving production efficiency.

[0004] However, in this invention patent, the process of injecting gas from the gas storage cylinder into the explosion cylinder cannot be controlled. The time difference between the two explosions is too short, and the pressure replenishment explosion effect of the gas storage cylinder is not obvious enough, resulting in some materials not undergoing sufficient explosion or remaining in the explosion cylinder. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the present invention provides a pressure-compensated steam explosion device, the technical solution of which is as follows:

[0006] A pressure-compensated steam explosion device includes a steam explosion tank, which is fixedly installed on a steam explosion tank support. A discharge box is located below the steam explosion tank support. Both the steam explosion tank support and the discharge box are fixed to the ground. The bottom of the steam explosion tank is connected to the upper part of the discharge box via a pipe. A feed box is located at the top of the steam explosion tank, and the feed inlet of the feed box is connected to the upper part of the steam explosion tank. The device is characterized in that a steam tank and a steam generator are also fixedly installed on the ground near the discharge box. The steam tank and the steam generator are connected via a pipe. The steam tank and the steam explosion tank are also connected via a pipe. A pressure-compensating valve is installed on the pipe. A pressure sensor is installed on the steam explosion tank. A steam explosion valve is installed at the connection between the discharge box and the steam explosion tank. During the steam explosion process, the pressure sensor monitors the pressure change inside the steam explosion tank and controls the opening and closing states of the steam explosion valve and the pressure-compensating valve to allow steam from the steam tank to fill the steam explosion tank, maintain the pressure value of the steam explosion tank, and slow down the depressurization rate of the steam explosion tank.

[0007] Furthermore, the steam explosion tank is equipped with a level gauge, and a conical screen plate is provided at the bottom of the steam explosion tank. The lower end of the conical screen plate is connected to the upper part of the discharge port. Several steam inlets are provided on the side wall of the steam explosion tank, and a drain outlet is provided at the bottom of the steam explosion tank.

[0008] Furthermore, the steam inlet extends into the interior of the steam explosion tank, and multiple small holes are distributed at the end of the steam inlet;

[0009] Furthermore, the steam outlet of the steam tank is connected to the steam inlet of the steam explosion tank through a pipeline. Before being connected to the steam inlet, the pipeline is divided into several branch pipelines, and each branch pipeline is equipped with a pressure-reducing valve.

[0010] Furthermore, the discharge box has a discharge box door on the side and a steam overflow pipe at the top of the box. The steam overflow pipe can prevent the discharge box from being damaged by the impact force of steam during the steam explosion.

[0011] Furthermore, the feed box is equipped with spiral conveying blades, and a feed valve is provided at the connection between the feed inlet of the feed box and the upper part of the gas explosion tank;

[0012] Furthermore, the steam tank, the steam explosion tank, and all steam pipes are covered with a thermal insulation layer.

[0013] Furthermore, the present invention also includes a second spiral conveying blade, a second feed inlet, a second feed valve, a second steam explosion tank, a second steam explosion tank support, a second discharge box, a second steam explosion valve, and a second pressure-reducing valve. The steam tank is simultaneously connected to the steam explosion tank and the second steam explosion tank through a pipeline, and the second pressure-reducing valve is set on a branch of the second pipeline.

[0014] Furthermore, the present invention also includes a second steam tank, and the steam generator is connected to both the steam tank and the second steam tank via a pipeline. The second steam tank and the second steam explosion tank are connected via a second pipeline, and a second pressure-reducing valve is provided on a branch of the second pipeline.

[0015] The technical solution of the present invention can provide pressure compensation during the steam explosion process, making the steam explosion more complete, the steam explosion tank discharge more thoroughly, and improving the steam explosion efficiency of materials. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention.

[0017] Figure 2 This is a side sectional view of the gas explosion tank according to Embodiment 1 of the present invention.

[0018] Figure 3 This is a side sectional view of the steam explosion tank according to Embodiment 2 of the present invention.

[0019] Figure 4 This is a schematic diagram of the overall structure of Embodiment 3 of the present invention.

[0020] Figure 5 This is a schematic diagram of the overall structure of Embodiment 4 of the present invention.

[0021] In the picture:

[0022] 1-Feed box, 11-Screw conveyor blade, 12-Feed inlet, 2-Feed valve, 3-Explosion tank, 31-Steam inlet, 32-Conical screen plate, 33-Discharge port, 34-Drain outlet, 35-Pressure sensor, 36-Level gauge, 4-Explosion tank support, 5-Discharge box, 51-Steam overflow pipe, 52-Box body, 53-Discharge box door, 6-Explosion valve, 7-Steam generator, 8-Steam tank, 9-Pipeline, 10-Pressure replenishing valve, 11'-Second screw conveyor blade, 12'-Second feed inlet, 2'-Second feed valve, 3'-Second explosion tank, 4'-Second explosion tank support, 5'-Second storage box, 51'-Second steam overflow pipe, 52'-Second box body, 53'-Second discharge box door, 6'-Second explosion valve, 8'-Second steam tank, 9'-Second pipeline, 10'-Second pressure replenishing valve. Detailed Implementation

[0023] To better understand the purpose, structure, and function of this invention, a pressure-compensated steam explosion device of this invention will be described in further detail below with reference to the accompanying drawings.

[0024] Figure 1 The first embodiment of the present invention is shown.

[0025] In this embodiment, the steam explosion tank 3 is fixedly installed on the steam explosion tank support 4. A discharge box 5 is provided below the steam explosion tank support 4. Both the steam explosion tank support 4 and the discharge box 5 are firmly fixed to the ground. The bottom of the steam explosion tank 3 is connected to the upper part of the discharge box 5 through a pipe. A steam explosion valve 6 is provided at the connection between the steam explosion tank 3 and the discharge box 5. A feed box 1 is provided at the top of the steam explosion tank 3. The feed inlet 12 of the feed box 1 is connected to the upper part of the steam explosion tank 3. A feed valve 2 is provided at the connection between the feed inlet 12 and the steam explosion tank 3. A steam tank 8 and a steam generator 7 are also fixedly installed on the ground near the discharge box 5. The steam tank 8 and the steam generator 7 are connected through a pipe. The steam tank 8 and the steam explosion tank 3 are connected through a pipe 9. The steam generator 7 can input the generated steam into the steam tank 8 and the steam explosion tank 3.

[0026] like Figure 2 As shown, a conical screen plate 32 is provided at the bottom inside the steam explosion tank 3. The lower end of the conical screen plate 32 is connected to the upper part of the discharge port 33. Several steam inlets 31 are provided on the side wall of the steam explosion tank 3. A drain outlet 34 is provided at the bottom of the steam explosion tank 3. A pressure sensor 35 is also provided on the side wall of the steam explosion tank 3. A level gauge 36 is provided on the top of the steam explosion tank 3.

[0027] The downward conical slope of the conical screen plate 32 makes it easier for the material to be discharged from the explosion tank 3 during the explosion. The condensate in the explosion tank 3 falls through the screen holes on the conical screen plate 32 into the space formed by the conical screen plate 32 and the space below the explosion tank 3, so as to separate the material from the condensate and enhance the explosion effect. After the explosion, the drain port 34 can be opened to discharge the condensate.

[0028] Steam inlet 31 can be set at different angles and heights on the side wall of the steam explosion tank 3, so that steam can enter the steam explosion tank 3 from various angles, avoiding the problem of materials not being able to contact the steam.

[0029] The steam outlet of steam tank 8 is connected to the steam inlet 31 of steam explosion tank 3 via a branch pipe of pipe 9. Each branch pipe is equipped with a pressure-reducing valve 10. During the steam explosion process, the pressure-reducing valve 10 is opened, and steam in steam tank 8 is fed into steam explosion tank 3, thereby replenishing the pressure in steam explosion tank 3, maintaining the steam explosion pressure differential of the material, and improving the steam explosion efficiency.

[0030] Both the steam explosion valve 6 and the pressure replenishing valve 10 are pneumatic quick-opening valves, and the entire system can be remotely and automatically controlled when it is in operation.

[0031] The pressure-compensated steam explosion device of the present invention includes the following steps in use:

[0032] 1. Open the feed valve 2 and the pressure replenishing valve 10, and close the steam explosion valve 6;

[0033] 2. Load the material into the feed box 1, start the screw conveyor blades 11 to send the material into the gas explosion tank 3 through the feed port 12. After the material level gauge 36 detects that the material has reached the specified height, control the screw conveyor blades 11 to stop rotating and close the feed valve 2.

[0034] 3. Start the steam generator 7 to fill the steam tank 8 and the steam explosion tank 3 with steam. After the pressure sensor 35 detects that the pressure in the steam explosion tank 3 has reached the specified value, it controls the pressure replenishment valve 10 to close.

[0035] 4. Continue to fill steam tank 8 with steam from steam generator 7 until the pressure inside steam tank 8 is higher than that in steam explosion tank 3, then turn off the steam generator;

[0036] 5. Open the steam explosion valve 6. The material inside the tank is ejected out of the steam explosion tank 3 with the steam. The pressure inside the tank drops rapidly. When the pressure sensor 35 detects that the pressure has dropped by 20%, it controls the pressure replenishment valve 10 to open and the steam explosion valve 6 to close. The steam in the steam tank 8 is filled into the steam explosion tank 3 until the pressure inside the steam explosion tank 3 reaches the specified value again. Then, the pressure replenishment valve 10 is closed.

[0037] 6. Repeat step 5 until the steam tank 8 can no longer make the pressure in the steam explosion tank 3 reach the specified value. At this time, the pressure replenishing valve 10 and the steam explosion valve 6 are no longer closed. All the pressure in the steam tank 8 and the steam explosion tank 3 is discharged, and the steam explosion process ends.

[0038] 7. Material and steam are injected into the discharge box 5. At the same time, the steam in the discharge box 5 overflows through the steam overflow pipe 51 to ensure that the discharge box 5 will not be damaged by pressure impact. The long design of the steam overflow pipe 51 ensures that while the steam overflows, the material will not be sprayed out from the steam overflow pipe 51.

[0039] 8. Open the discharge box door 53 and remove the material after the steam explosion.

[0040] Repeating the above process can meet the demand for efficient steam explosion processing of straw under industrial requirements.

[0041] Figure 3 The following is a second embodiment of the present invention.

[0042] In this embodiment, the steam inlet 31 extends into the interior of the steam explosion tank, and its end is distributed with multiple small holes. During the heating and pressure holding process, even if the tank is filled with a large amount of material that buries the steam inlet 31, steam can still penetrate into the material pile from multiple angles, avoiding the problem of material accumulation and the center of the material pile not being able to contact the steam.

[0043] Figure 4 The following is a third embodiment of the present invention.

[0044] In this embodiment, the present invention has a second steam explosion tank 3' and a matching second steam explosion tank support 4' and a second discharge box 5'. A second steam explosion valve 6' is provided on the pipe connecting the second steam explosion tank 3' and the second discharge box 5'. The feed box 1 has a second feed inlet 12' corresponding to the second steam explosion tank 3' and a second spiral conveying blade 11'. A second feed valve 2' is provided between the second feed inlet 12' and the second steam explosion tank 3'. The second steam explosion tank 3' is connected to the steam tank 8 through a second pipe 9'. A second pressure-reducing valve 10' is provided on a branch of the second pipe 9'.

[0045] During the steam explosion process of steam explosion tank 3, the second steam explosion tank 3' can be loaded. After the steam explosion of steam explosion tank 3 is completed, during the discharging and loading process, the second steam explosion tank 3' can be detonated. In this way, while one steam explosion tank is detonating, other steam explosion tanks can prepare for detonation. By utilizing the time difference, a single steam tank can provide steam to multiple steam explosion tanks, thus improving work efficiency.

[0046] Figure 5 The following is a fourth embodiment of the present invention.

[0047] In this embodiment, the present invention has multiple steam tanks connected to the steam generator 7 (other steam tanks are not shown in the figure except for 8'). The second steam tank 8' is connected to the steam generator 7 through a pipe, and the second steam tank 8' is connected to the steam explosion tank 3 through a second pipe 9'. A second pressure-replenishing valve 10' is provided on a branch of the second pipe 9'. During the steam explosion process, the pressure-replenishing valve 10 and the second pressure-replenishing valve 10' can be opened sequentially by a pressure sensor to successively replenish the steam in the steam tank 8 and the second steam tank 8' into the steam explosion tank 3, thereby increasing the depressurization time of the steam explosion tank 3, further delaying the depressurization rate, and improving the steam explosion efficiency.

[0048] It is understood that the present invention has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of the present invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of the present invention.

Claims

1. A pressure-compensated steam explosion device, comprising a steam explosion tank (3), the steam explosion tank (3) being fixedly mounted on a steam explosion tank support (4), a discharge box (5) being provided below the steam explosion tank support (4), both the steam explosion tank support (4) and the discharge box (5) being fastened to the ground, the bottom of the steam explosion tank (3) being connected to the upper part of the discharge box (5) via a pipe, and a feed box (1) being provided at the top of the steam explosion tank (3), the feed inlet (12) of the feed box (1) being connected to the upper part of the steam explosion tank (3), characterized in that, A steam tank (8) and a steam generator (7) are fixedly installed on the ground near the discharge box (5). The steam tank (8) and the steam generator (7) are connected by a pipe. The steam tank (8) and the steam explosion tank (3) are connected by a pipe (9). A pressure-replenishing valve (10) is installed on the pipe (9). A pressure sensor (35) is installed on the steam explosion tank (3). A steam explosion valve (6) is installed at the connection between the discharge box (5) and the steam explosion tank (3). During the steam explosion, the pressure change in the steam explosion tank (3) is monitored by the pressure sensor (35). The opening and closing states of the steam explosion valve (6) and the pressure-replenishing valve (10) are controlled so that the steam in the steam tank (8) is filled into the steam explosion tank (3), maintaining the pressure value of the steam explosion tank (3) and slowing down the depressurization rate of the steam explosion tank (3).

2. The pressure-compensated steam explosion device according to claim 1, characterized in that: The steam explosion tank (3) is equipped with a level gauge (36). A conical screen plate (32) is provided at the bottom inside the steam explosion tank (3). The lower end of the conical screen plate is connected to the upper part of the discharge port (33). Several steam inlets (31) are provided on the side wall of the steam explosion tank (3). A drain outlet (34) is provided at the bottom of the steam explosion tank (3).

3. The pressure-compensated steam explosion device according to claim 2, characterized in that: The steam inlet (31) extends into the interior of the steam explosion tank (3), and multiple small holes are distributed at the end of the steam inlet (31).

4. A pressure-compensated steam explosion device according to claim 2 or 3, characterized in that: The steam tank (8) is equipped with a pressure sensor (81). The steam outlet of the steam tank (8) is connected to the steam inlet (31) of the steam explosion tank (3) through the pipe (9). Before the pipe (9) is connected to the steam inlet (31), it is divided into several branch pipes. Each branch pipe is equipped with a pressure valve (10).

5. A pressure-compensated steam explosion device according to claim 4, characterized in that: The discharge box (5) has a discharge box door (53) on the side of the box body (52) and a steam overflow pipe (51) at the top of the box body (52). The steam overflow pipe (51) can prevent the impact force caused by steam during the steam explosion from damaging the discharge box (5).

6. A pressure-compensated steam explosion device according to claim 5, characterized in that: The feed box (1) is equipped with a spiral conveying blade (11), and the feed inlet (12) of the feed box (1) is connected to the upper part of the gas explosion tank (3) with a feed valve (2).

7. A pressure-compensated steam explosion device according to claim 6, characterized in that: The steam tank (8), the steam explosion tank (3) and all steam pipes are covered with a heat insulation layer.

8. A pressure-compensated steam explosion device according to claim 7, characterized in that: This pressure-compensated steam explosion device also includes a second spiral conveyor blade (11'), a second feed inlet (12'), a second feed valve (2'), a second steam explosion tank (3'), a second steam explosion tank support (4'), a second discharge box (5'), a second steam explosion valve (6'), and a second pressure-reducing valve (10'). The steam tank (8) is connected to the steam explosion tank (3) and the second steam explosion tank (3') through a second pipeline (9'). The second pressure-reducing valve (10') is located on a branch of the second pipeline (9').

9. A pressure-compensated steam explosion device according to claim 7, characterized in that: This pressure-compensated steam explosion device also includes a second steam tank (8'). The steam generator (7) is connected to both the steam tank (8) and the second steam tank (8') through a pipeline. The second steam tank (8') and the steam explosion tank (3) are connected through a second pipeline (9'). A second pressure-compensating valve (10') is installed on a branch of the second pipeline (9').

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