阅读说明：本技术 一种工业级自动化连续汽爆系统及方法 (Industrial-grade automatic continuous steam explosion system and method ) 是由 桂夏辉 张鹏德 邢耀文 丁世豪 张友飞 于 2019-11-05 设计创作，主要内容包括：一种工业级自动化连续汽爆系统及方法,适用大批量工业话生物质预处理、洁净煤技术使用。由电气控制系统、蒸汽发生及增压系统、汽爆系统、二次处理装置等部分组成,实现了汽爆装置大型化、自动化、安全化,可用于发酵工程、饲料产业、洁净煤技术等多个领域。电气控制系统精密度高,可实现增压、增温、定时、泄压、加料等操作的有效控制,可与计算机对接采集与分析数据,汽爆系统采用多端分别通入蒸汽与增压的设计,满足多种介质的汽爆过程,定时搅拌避免介质渗透效果差,进料口可与加料装置结合完成连续化自动加料,汽爆完成后可进行内部冲洗。设备自动化程度高、安全性好、适合工业化使用,提高产业效率。(An industrial-grade automatic continuous steam explosion system and method are suitable for the technologies of biomass pretreatment and clean coal of large-scale industrial phones. The device consists of an electrical control system, a steam generation and pressurization system, a steam explosion system, a secondary treatment device and the like, realizes the large-scale, automation and safety of the steam explosion device, and can be used in a plurality of fields of fermentation engineering, feed industry, clean coal technology and the like. The electric control system has high precision, can realize effective control of operations such as pressurization, temperature rise, timing, pressure relief, charging and the like, can be in butt joint with a computer for collecting and analyzing data, adopts the design that steam and pressurization are respectively introduced into multiple ends for a steam explosion system, meets the steam explosion process of various media, regularly stirs to avoid poor medium permeation effect, can combine with a feeding device to complete continuous automatic charging, and can carry out internal flushing after the steam explosion is completed. The equipment has high automation degree and good safety, is suitable for industrial use, and improves the industrial efficiency.)

1. The utility model provides an automatic continuous steam explosion system of industrial grade which characterized in that: the steam explosion device comprises a base support (1), an electric box (2), a steam generation device (3), a steam explosion system and a secondary treatment device (16), wherein the electric box (2), the steam generation device (3) and the secondary treatment device (16) are respectively arranged on the base support (1), the bottom of the steam explosion system is connected with a tailing treatment system, and a plurality of pipelines are arranged between the steam generation device (3) and the steam explosion system and are connected with one another;

wherein the steam explosion system includes tubular structure's vapour explosion chamber (5), vapour explosion chamber (5) top is equipped with multilayer seal top cap (8), multilayer seal top cap (8) centre of a circle department is equipped with electric stirring device (10) that stretch into in vapour explosion chamber (5), still be equipped with forced induction unit (9) and water inlet (11) on multilayer seal top cap (8), be equipped with high-pressure washing subassembly (12) in vapour explosion chamber (5) of multilayer seal top cap (8) below, vapour explosion chamber (5) bottom is the export of funnel structure, open or close the pressure-bearing sealed and the reaction of realizing in the reaction after opening the ejection of compact by electronic hydraulic column (18) lift control bottom multistage sealing layer (13) in the testing process. A feed inlet (7) is arranged above one side of the steam explosion chamber (5), a plurality of steam switches (6) connected with the inside of the steam explosion chamber (5) are arranged on the other side surfaces, a steam distribution and pressurization switch (4) is arranged on the steam generating device (3), and the steam distribution and pressurization switch (4) is respectively connected with the steam switches (6) on all the steam explosion chambers (5) through pipelines;

the secondary treatment device (16) comprises a buffer layer (15), a discharge hole (17), an electric hydraulic column (18) and a pressure release valve (14), a damping spring is arranged between the bottom of the device and the base support (1), the device is internally provided with the buffer layer (15) and the electric hydraulic column (18) which are designed in an inclined manner, the lowest part of the buffer layer (15) is provided with the discharge hole (17) with the functions of filtering separation and high-pressure sealing at the side surface of the box body, the top of a telescopic rod of the electric hydraulic column (18) is connected with a bottom multi-stage sealing layer (13) with a multi-layer structure, the bottom multi-stage sealing layer (13) is matched with a funnel structure outlet at the bottom of the steam explosion chamber (7), one end close to, one end of the electric hydraulic column (18) electrically controls the lifting to control the opening or closing of the bottom multi-stage sealing layer (13) so as to realize pressure-bearing sealing in the reaction and open discharging after the reaction is finished. The bottom of the steam explosion chamber (5) is provided with a plurality of pressure release valves (14) close to the highest end of the buffer layer, the pressure release valves are communicated with the steam explosion chamber (5) and are used for controlling steam explosion reaction, steam released by the steam explosion chamber (5) can enter a secondary treatment device instantly to form certain pressure, a high-pressure flushing assembly (12) is opened to clean the inner wall of the steam explosion chamber (5), flushed materials and steam explosion substances fall into the secondary treatment device (16) through the smooth upper surface of a bottom multistage sealing layer (13), the materials and the steam explosion substances are discharged through an outer sealing cover of an opened discharge port (17), and solid-liquid separation is completed through a filtering device. After the cleaning is finished, the electric hydraulic column (18) is started to seal the bottom of the steam explosion chamber, and the feeding hole (7) is opened for re-filling.

2. The industrial-scale automated continuous steam explosion system according to claim 1, wherein: the steam generating device (3) needs to be butted with a booster pump to control pressure, and a thermocouple is arranged to control steam temperature; the plurality of steam switches (6) are distributed in a manner of being sparse at the top and dense at the bottom, are arranged around the steam explosion chamber (5), provide steam for the steam explosion chamber (7) when in conduction, and maintain pressure for the steam explosion chamber (7) when in closing.

3. The industrial-scale automated continuous steam explosion system according to claim 1, wherein: the feed inlet (7) is controlled to be opened and sealed by a motor, and can be used as a feed inlet of a supporting plate butt joint feeding device to enable materials to smoothly enter the steam explosion chamber (5) when being opened.

4. The industrial-scale automated continuous steam explosion system according to claim 1, wherein: the multi-layer sealing top cover (8) is of a multi-layer sealing structure to keep good air tightness, a plurality of pressure units are installed on a main body of the steam explosion chamber (5), the multi-layer sealing top cover is divided into 3 planes from bottom to top according to the height of the main body, the heights of the planes are respectively 15-30%, 25-40% and 35-50% of the height of the main body, 3-6 pressure measuring units are arranged on each plane, or more accurate pressure control is needed, a plurality of planes can be arranged, the distribution heights of all sections from bottom to top are sequentially increased, pressure collection of different pressure sensors in each section is integrated in one temperature measurement collecting station, each collecting station is connected to a computer through Ethernet and is respectively displayed on a pressure dial of the electric box (2), and reliability of detected pressure data is guaranteed.

5. The industrial-scale automated continuous steam explosion system according to claim 1, wherein: buffer layer (15) are polystyrene, polyvinyl chloride processing forms the foamed plastic who has hydrophobic effect, and inclination 40-70 makes the material discharge smoothly with supplementary washing unit, and electronic hydraulic column (18) bottom and main part are sealed in the buffer layer by waterproof plastic barrel, and flexible post is sealed by scalable waterproof protective sheath, prevents that liquid and impurity from causing the destruction to the device.

6. A steam explosion method using the industrial-scale automated continuous steam explosion system of claim 1, characterized by the steps of:

a, controlling an electric hydraulic column (18) to seal a bottom multi-stage sealing layer (13) with a bottom outlet of a steam explosion chamber (5), and pressing to check whether air leakage exists before filling after sealing;

b, opening the feed inlet (7), adding the materials and the reaction medium, closing and sealing at high pressure;

c, starting the steam generating device (3), distributing pressurized steam into each steam switch (6) through a pipeline by using a steam distribution and pressurization switch (4), introducing the steam into the steam explosion chamber (5) to reach a set pressure, and maintaining the pressure;

d, the height of the whole steam explosion chamber is averagely divided into 3-6 planes, the pressure sensing units (9) are distributed according to the number of 3-6 planes with the same height, the pressures of different height sections are collected in real time and sent to the electric box (2) to be integrated with the pressure of multiple sections and corrected to obtain relatively accurate reaction pressure, and the defect that the single pressure sensing unit cannot accurately react the pressure is overcome;

e, starting the electric stirring device (10) to stir once every 30-60s according to the preset setting, wherein the stirring time is 20-50s, and the stirring speed is 5-10r/min, so as to ensure that the materials are fully soaked by steam;

f, finishing the steam explosion reaction after the preset steam explosion reaction time is reached, opening the pressure release valve (14), driving the bottom sealing layer (13) to descend by the electric hydraulic column (18), and naturally dropping the materials finishing the steam explosion in the steam explosion chamber (5) and discharging the materials from the discharge hole (16) along the inclination angle of the bottom multi-stage sealing layer (13) and the buffer layer (15).

7. The steam explosion method according to claim 6, characterized in that: the maximum pressure born in the steam explosion chamber (5) is 15-20MPa, low-pressure, medium-pressure and high-pressure steam explosion reactions are met, and the inner wall is corrosion-resistant and wear-resistant and meets the reaction of an alkaline medium.

8. The steam explosion method according to claim 6, characterized in that: when most of materials in the steam explosion chamber (7) are discharged, the water inlet (11) is opened to feed water, the inner wall of the steam explosion chamber (7) is subjected to high-pressure cleaning by utilizing the high-pressure cleaning assembly (12) in the steam explosion chamber (7), the inclination angle of the cleaning spray heads is 30-45 degrees, and the cleaning spray heads are evenly distributed on the same plane in the device according to the number of 3-12.

Technical Field

The invention relates to a steam explosion system and a steam explosion method, in particular to an industrial-grade automatic continuous steam explosion system and a method which are suitable for the technologies of large-batch industrial biomass pretreatment and clean coal.

Background

Steam explosion has been a technique for pretreating biomass by an explosion process using the principle of steam ejection. The steam molecules permeating into the plant tissue are released instantly, so that the internal energy of the steam is converted into mechanical energy and acts on the cell layers of the biomass tissue, and the raw material is decomposed according to the purpose by using less energy. The method not only avoids the secondary pollution problem of chemical treatment, but also solves the problem of low biological treatment efficiency at present, and is the most promising pretreatment technology in the field of biomass conversion. In recent years, with the technological progress and improvement, steam explosion technology and equipment are beginning to be applied to a plurality of fields such as chemicals, environmental protection, pharmaceutical industry and the like.

It is important to select from laboratory-level equipment, a series of equipment that can ensure the consistency of the experiment and production, and ensure the transferability of process parameters in the future. Secondly, whether various important parameters of the equipment have accurate measurement and control and metering facilities or not and whether the process parameter setting and quantitative control are accurate, stable and convenient or not are examined, and measurement and control integration of parameters such as pressure and liquid level of a steam source are important considerations for steam explosion technology and equipment. Therefore, as the steam explosion technology is more and more applied to a plurality of fields, the design and development of the steam explosion system with high precision, large processing capacity and high automation degree has important significance.

Disclosure of Invention

The purpose of the invention is as follows: aiming at the technical problems, the industrial-grade automatic continuous steam explosion system and the method can meet the steam explosion reaction of various media and a plurality of pressure sections, can realize continuous treatment and have important significance for the industrial application of the steam explosion reaction.

The technical scheme is as follows: in order to achieve the technical purpose, the industrial-grade automatic continuous steam explosion system is characterized in that: the steam explosion device comprises a base support, an electric box, a steam generation device, a steam explosion system and a secondary treatment device, wherein the electric box, the steam generation device and the secondary treatment device are respectively arranged on the base support;

wherein the steam explosion system includes tubular structure's steam explosion chamber, the steam explosion chamber top is equipped with multilayer seal top cap, multilayer seal top cap centre of a circle department is equipped with the electronic agitating unit who stretches into in the steam explosion chamber, still be equipped with forced induction unit and water inlet on the multilayer seal top cap, be equipped with high-pressure flushing assembly in the steam explosion chamber of multilayer seal top cap below, steam explosion chamber bottom is the export of funnel structure, open or close the sealed and open the ejection of compact after the reaction of pressure-bearing in the realization reaction by the multistage sealing layer in electronic hydraulic column lift control bottom in the test process. A feed inlet is arranged above one side of the steam explosion chamber, a plurality of steam switches connected with the steam explosion chamber are arranged on the other side surfaces of the steam explosion chamber, a steam distribution and pressurization switch is arranged on the steam generating device, and the steam distribution and pressurization switch is respectively connected with the steam switches on all the steam explosion chambers through pipelines;

the secondary treatment device includes the buffer layer, the discharge gate, electronic hydraulic column, the relief valve, be equipped with damping spring between device bottom and the base support, inside buffer layer and the electronic hydraulic column that is equipped with the slope design of device, the lowest of buffer layer is equipped with the discharge gate that has filtering separation and high-pressure seal effect in the box side, the multi-stage sealing layer in bottom that the telescopic link top hookup of electronic hydraulic column has multilayer structure, the multi-stage sealing layer in bottom matches with the funnel structure export of vapour explosion chamber bottom, the one end and the secondary treatment device hookup of being close to the buffer layer highest end, the one end is opened or is closed the sealed and the reaction of opening the ejection of compact of pressure-bearing in the realization reaction through electronic hydraulic column electric. The bottom of the steam explosion chamber is provided with a plurality of pressure relief valves near the highest end of the buffer layer, the pressure relief valves are communicated with the steam explosion chamber and used for controlling steam explosion reaction, steam released by the steam explosion chamber can instantly enter a secondary treatment device to form certain pressure, a high-pressure washing assembly is opened to clean the inner wall of the steam explosion chamber, washed materials and steam explosion substances fall into the secondary treatment device through the smooth upper surface of the multistage sealing layer at the bottom, and are discharged through the outer sealing cover of the opened discharge port, and solid-liquid separation is completed through a filtering device. After the cleaning is finished, the electric hydraulic column is started to seal the bottom of the steam explosion chamber, and the feeding hole is opened for secondary filling.

The steam generating device needs to be butted with a booster pump to control pressure, and a thermocouple is arranged to control steam temperature; the pressure distribution of the steam switches is that the steam switches are arranged at the upper part, the lower part and the periphery of the steam explosion chamber, steam is provided for the steam explosion chamber when the steam explosion chamber is conducted, and pressure maintaining is carried out on the steam explosion chamber when the steam explosion chamber is closed.

The feed inlet is controlled to be opened and sealed by a motor, and can be used as a feed inlet of a supporting plate butt joint feeding device to enable materials to smoothly enter a steam explosion chamber when being opened.

The multi-layer sealing top cover is of a multi-layer sealing structure to keep good air tightness, a plurality of pressure units are installed on a main body of the steam explosion chamber, the multi-layer sealing top cover is divided into 3 planes from bottom to top according to the height of the main body, the heights of the planes are respectively 15-30%, 25-40% and 35-50% of the height of the main body, each plane is provided with 3-6 pressure measuring units, or more accurate pressure control is needed, a plurality of planes can be set, the principle that the heights of the distribution of the sections from bottom to top are sequentially increased is adopted, pressure collection of different pressure sensors at each section is integrated in one temperature measurement collection station, each collection station is connected to a computer through Ethernet and is respectively displayed on a pressure dial of an electric box, and reliability of detected pressure data is guaranteed.

The buffer layer is made of polystyrene and polyvinyl chloride and is made of foam plastic with a hydrophobic effect, the inclination angle is 40-70 degrees, noise is effectively eliminated, the auxiliary flushing device enables materials to be smoothly discharged, the bottom and the main body of the electric hydraulic column are sealed in the buffer layer through the waterproof plastic cylinder, the telescopic column is sealed through the telescopic waterproof protective sleeve, and damage to the device caused by liquid and impurities is prevented;

an industrial-grade automatic continuous steam explosion method comprises the following steps:

a, controlling an electric hydraulic column to seal a bottom multi-stage sealing layer of a steam explosion chamber from a bottom outlet, and checking whether air leakage exists or not through pressurization before filling after sealing;

b, opening a feed inlet, adding the materials and the reaction medium, closing the feed inlet, and sealing the feed inlet at high pressure;

c, starting the steam generating device, distributing pressurized steam into each steam switch through a pipeline by using a steam distribution and pressurization switch, introducing the steam into the steam explosion chamber, and maintaining the pressure after the pressure reaches a set pressure;

d, the height of the whole steam explosion chamber is averagely divided into 3-6 planes, the pressure sensing units are distributed according to the number of 3-6 planes with the same height, the pressures of different height sections are collected in real time and sent to an electric box for integration of multi-section pressure and correction to obtain relatively accurate reaction pressure, and the defect that the single pressure sensing unit cannot accurately react pressure is overcome;

e, starting the electric stirring device to stir once every 30-60s according to preset settings, wherein the stirring time is 20-50s, and the stirring speed is 5-10r/min, so as to ensure that the materials are fully soaked by steam;

and f, finishing the steam explosion reaction after the preset steam explosion reaction time is reached, opening the pressure release valve, driving the bottom sealing layer to descend by the electric hydraulic column, and naturally falling the materials which finish the steam explosion in the steam explosion chamber and discharging the materials from the discharge port along the inclination angle of the bottom multi-stage sealing layer and the buffer layer.

The maximum pressure born in the steam explosion chamber is 15-20MPa, low-pressure, medium-pressure and high-pressure steam explosion reactions are met, and the inner wall is corrosion-resistant and wear-resistant and meets the reaction of an alkaline medium.

When most materials in the steam explosion chamber are discharged, the water inlet is opened to feed water, the inner wall of the steam explosion chamber is cleaned at high pressure by using the high-pressure flushing assembly in the steam explosion chamber, the inclination angle of the flushing spray heads is 30-45 degrees, and the flushing spray heads are uniformly distributed on the same plane in the device according to the number of 3-12.

Has the advantages that:

the invention realizes the industrial control of the steam explosion reaction in a mode of accurately controlling the reaction conditions and highly intensively controlling the electric units; the bottom discharging mode is adopted, discharging is convenient, equipment and energy consumption are reduced, and the pressure of a bottom sealing layer is reduced because the bottom of the steam explosion chamber is of a funnel structure; the bottom of the device is provided with a multi-stage sealing layer for sealing materials and air pressure in an electro-hydraulic mode, and an inclination angle formed when the sealing layer is opened is beneficial to smooth discharge of the materials; the device is provided with a secondary treatment device to convey and transition materials after the steam explosion reaction is finished. The buffer layer with the inclination angle can absorb part of instantaneous explosion noise, simultaneously can lead the discharged materials to be brought out of the secondary treatment bin along with the cleaning water flow in a short time, realizes solid-liquid separation to a common filter pressing or suction filtration device, and has the advantages of simple structure, convenient use and high production efficiency.

Drawings

FIG. 1 is a schematic diagram of an industrial-scale automated continuous steam explosion system according to the present invention;

in the figure: 1-base and support, 2-electric box, 3-steam generating device, 4-steam distribution and pressurization switch, 5-steam explosion chamber, 6-steam switch, 7-feed inlet, 8-layer sealing top cover, 9-pressure sensing unit, 10-electric stirring device, 11-water inlet, 12-high-pressure flushing sprayer, 13-bottom multi-stage sealing layer, 14-pressure release valve, 15-buffer layer, 16-secondary treatment bin, 17-discharge outlet and 18-electric hydraulic column.

Detailed Description

The following further describes embodiments of the present invention with reference to the accompanying drawings:

as shown in fig. 1, the industrial-grade automatic continuous steam explosion system of the present invention comprises a base support 1, an electrical box 2, a steam generation device 3, a steam explosion system, and a secondary processing device 16, wherein the electrical box 2, the steam generation device 3, and the secondary processing device 16 are respectively disposed on the base support 1, the bottom of the steam explosion system is connected with the tailing processing system, and a plurality of pipelines are disposed between the steam generation device 3 and the steam explosion system and are connected with each other;

wherein the steam explosion system includes tubular structure's steam explosion room 5, 5 tops in the steam explosion room are equipped with multilayer seal top cap 8, 8 centre of a circle departments of multilayer seal top cap are equipped with the electric stirring apparatus 10 that stretches into in the steam explosion room 5, still be equipped with pressure sensing unit 9 and water inlet 11 on the multilayer seal top cap 8, be equipped with high pressure washing assembly 12 in the steam explosion room 5 of multilayer seal top cap 8 below, 5 bottoms in the steam explosion room are the export of funnel structure, open or close the ejection of compact after realizing the pressure-bearing seal in the reaction and the reaction by the multistage sealing layer 13 in electronic hydraulic column 18 lift control bottom in the test process. A feed inlet 7 is arranged above one side of the steam explosion chamber 5, a plurality of steam switches 6 connected with the inside of the steam explosion chamber 5 are arranged on the other side surfaces, a steam distribution and pressurization switch 4 is arranged on the steam generating device 3, and the steam distribution and pressurization switch 4 is respectively connected with the steam switches 6 on all the steam explosion chambers 5 through pipelines; the steam generating device 3 needs to be butted with a booster pump to control pressure, and a thermocouple is arranged to control steam temperature; the plurality of steam switches 6 are distributed in a manner of being sparse at the top and dense at the bottom and are arranged around the steam explosion chamber 5, steam is provided for the steam explosion chamber 7 when the steam explosion chamber is conducted, pressure maintaining is carried out on the steam explosion chamber 7 when the steam explosion chamber is closed, the feed port 7 is controlled to be opened and sealed by a motor, and the feed port 7 can be used as a supporting plate to be butted with the feed port of the feeding device when the feed port is opened, so that materials can smoothly enter the steam explosion; the multilayer sealing top cover 8 is a multilayer sealing structure to keep good air tightness, a plurality of pressure units are arranged on a main body of the steam explosion chamber 5, the main body is divided into 3 planes from bottom to top according to the height of the main body, the heights of the planes are respectively 15-30%, 25-40% and 35-50% of the height of the main body, each plane is provided with 3-6 pressure measuring units, or more accurate pressure control is needed, a plurality of planes can be arranged, the principle that the distribution heights of all sections from bottom to top are sequentially increased is adopted, pressure collection of different pressure sensors at each section is integrated in one temperature measurement collection station, each collection station is connected to a computer by utilizing Ethernet and is respectively displayed on a pressure dial plate of the electric box 2, and the reliability of detected pressure data is ensured;

secondary treatment device 16 includes buffer layer 15, discharge gate 17, electronic hydraulic column 18, relief valve 14, be equipped with damping spring between device bottom and the base support 1, inside buffer layer 15 and the electronic hydraulic column 18 that is equipped with the slope design of device, the lowest of buffer layer 15 is equipped with discharge gate 17 that has filtering separation and high-pressure sealing effect in the box side, the multistage sealing layer 13 in bottom that has multilayer structure of the hookup of telescopic link top of electronic hydraulic column 18, the multistage sealing layer 13 in bottom matches with the funnel structure export of steam explosion room 7 bottom, the one end and the secondary treatment device hookup of being close to buffer layer 15 highest end, the ejection of compact is opened after the one end is opened through electronic hydraulic column 18 electric control bottom multistage sealing layer 13 opens or closes the pressure-bearing seal in the realization reaction and the reaction. The bottom of the steam explosion chamber 5 is provided with a plurality of pressure release valves 14 close to the highest end of the buffer layer, the pressure release valves are communicated with the steam explosion chamber 5 and used for controlling steam explosion reaction, steam released by the steam explosion chamber 5 can instantly enter a secondary treatment device to form certain pressure, the high-pressure washing component 12 is opened to clean the inner wall of the steam explosion chamber 5, washed materials and steam explosion substances fall into the secondary treatment device 16 through the smooth upper surface of the bottom multistage sealing layer 13 and are discharged through the outer sealing cover of the opened discharge port 17, and solid-liquid separation is completed through the filtering device. After the cleaning is finished, the electric hydraulic column 18 is started to seal the bottom of the steam explosion chamber, and the feeding hole 7 is opened for filling again.

An industrial-grade automatic continuous steam explosion method comprises the following steps:

a, controlling an electric hydraulic column 18 to seal the bottom multi-stage sealing layer 13 of the steam explosion chamber 5 at the bottom, and checking whether air leakage exists or not through pressurization before filling after sealing; the maximum pressure born in the steam explosion chamber 5 is 15-20MPa, low-pressure, medium-pressure and high-pressure steam explosion reactions are met, and the corrosion resistance and wear resistance of the inner wall meet the reaction of an alkaline medium;

b, opening a feed inlet 7, adding materials and reaction media, closing and sealing at high pressure;

c, starting the steam generating device 3, distributing pressurized steam into each steam switch 6 through a pipeline by using a steam distribution and pressurization switch 4, introducing the steam into the steam explosion chamber 5, and maintaining the pressure after the pressure reaches a set pressure;

d, the height of the whole steam explosion chamber is averagely divided into 3-6 planes, the pressure sensing units 9 are distributed according to the number of 3-6 planes with the same height, the pressures of different height sections are collected in real time and sent to the electric box 2 to be integrated with the multi-section pressure and corrected to obtain relatively accurate reaction pressure, and the defect that the single pressure sensing unit cannot accurately react the pressure is overcome;

e, starting the electric stirring device 10 to stir once every 30-60s at regular time according to preset setting, wherein the stirring time is 20-50s, and the stirring speed is 5-10r/min, so as to ensure that the materials are fully soaked by steam;

f, finishing the steam explosion reaction after the preset steam explosion reaction time is reached, opening the pressure release valve 14, driving the bottom sealing layer 13 to descend by the electric hydraulic column 18, and naturally dropping the materials which finish the steam explosion in the steam explosion chamber 5 and discharging the materials from the discharge hole 16 along the inclination angle of the bottom multi-stage sealing layer 13 and the buffer layer 15.

When most of materials in the steam explosion chamber 7 are discharged, the water inlet 11 is opened to feed water, the inner wall of the steam explosion chamber 7 is subjected to high-pressure cleaning by using the high-pressure cleaning assembly 12 in the steam explosion chamber 7, the inclination angle of the cleaning spray heads is 30-45 degrees, and the cleaning spray heads are evenly distributed on the same plane in the device according to the quantity of 3-12.

The electrical box 2 is a PLC electrical control cabinet, the control unit is a steam flow control unit, and an electric control flowmeter is used for flow control and data acquisition, including an electromagnetic flowmeter; steam is generated in an electric water heating mode, temperature data is collected in real time through a thermocouple and displayed on an instrument panel of the electric control cabinet, the thermocouple is a threaded detachable thermocouple, an automatic heating unit is arranged, and heat is preserved after the set temperature is reached; a high-pressure digital display type pressure controller is selected for pressure setting and analysis, when the pressure of each section reaches the set pressure, the air pump is stopped through signal feedback, and the pressure in the reaction device is maintained; the automatic cleaning unit controls the introduction of cleaning liquid and the flushing of the inner wall of equipment by a switch integrated in an electrical control cabinet, a cleaning spray head adopts an internal thread type multi-head cleaning nozzle, the sealing performance is good, the multi-angle cleaning can be realized, and an electric hydraulic control unit adopts a fixed electric hydraulic system; the control units assemble the switch equipment, the measuring instrument, the protective electric appliance and the auxiliary equipment on the control cabinet according to requirements, and the circuit is switched on or switched off through a manual or automatic switch in normal operation. When the fault or abnormal operation occurs, the circuit is cut off or an alarm is given by the aid of the protective electric appliance. And after parameters are set according to the operating conditions of all the units, the parameters are written into a PLC memory through a programmer to complete the control and operation of the whole system.