Continuous steam explosion machine

Abstract

The present invention provides a continuous steam explosion machine, including a low-temperature and low-pressure chamber, a high-temperature and high-pressure chamber, a reciprocating feeding device and a steam explosion chamber; the low-temperature and low-pressure chamber preheats the material; the high-temperature and high-pressure chamber is connected to the low-temperature and low-pressure chamber, and a plurality of steam inlets are provided on the high-temperature and high-pressure chamber to heat and pressurize the pretreated material and keep it warm and pressurized; a first intermediate cavity is provided in the reciprocating feeding device, and the first intermediate cavity is connected to the high-temperature and high-pressure chamber, so that the material in the high-temperature and high-pressure chamber enters the first intermediate cavity; the steam explosion chamber is connected to the first intermediate cavity; wherein, after the material processed in the high-temperature and high-pressure chamber enters the first intermediate cavity, the reciprocating feeding device moves to connect the first intermediate cavity with the steam explosion chamber, and the material in the first intermediate cavity is instantly depressurized and explodes after entering the steam explosion chamber. Without affecting the steam explosion efficiency, the volume of the material in the steam explosion chamber for a single steam explosion is reduced, and the noise generated during the steam explosion is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of papermaking, in particular to a continuous steam explosion machine. Background Art

[0002] Bamboo plants have the characteristics of fast growth, short felling period and high yield. Since bamboo was successfully developed and utilized, it has been widely used in papermaking, sugar making and other fields. In addition, many new technologies and processes have been developed, and its commercial value is constantly increasing.

[0003] At present, there are three methods for obtaining bamboo pulp using bamboo as raw materials: mechanical method, chemical method and chemical mechanical method. Most of the domestic pulping is done by chemical process, accounting for about 70%, and chemical mechanical process accounts for less than 30%. Mechanical pulping is currently limited to the experimental stage, and there is no report of large-scale industrialization. For mass production, there are many unfavorable factors brought by chemical process and mechanical chemical process. The use of chemical agents is self-evident for environmental pollution. At the same time, chemical waste needs to be treated, which not only pollutes the environment, but also loses economic costs. In addition, the pulping rate of chemical process is low, generally 45%-55%, the pulping rate of chemical mechanical process can generally reach 72%-75%, and the pulping rate of mechanical process is about 95%, which is much higher than chemical process and chemical mechanical process.

[0004] With the rise of bamboo and wood steam explosion technology, it can be predicted that it will develop into a mainstream process of mechanical environmentally friendly pulping in the future. However, there are few bamboo and wood steam explosion fiber production processes and related equipment on the market, and the steam explosion noise is large. Summary of the invention

[0005] The purpose of the present application is to provide a continuous steam explosion machine with simple production process and low steam explosion noise.

[0006] In order to solve the above technical problems, this application adopts the following technical solutions:

[0007] According to one aspect of the present application, the present application provides a continuous steam explosion machine, which includes: a low-temperature and low-pressure chamber, a high-temperature and high-pressure chamber, a reciprocating feeding device and a steam explosion chamber; the low-temperature and low-pressure chamber is used to accommodate materials and preheat the materials; the high-temperature and high-pressure chamber is connected to the low-temperature and low-pressure chamber, and the materials pretreated by heating in the low-temperature and low-pressure chamber enter the high-temperature and high-pressure chamber, and a plurality of steam inlets are opened on the high-temperature and high-pressure chamber to heat, pressurize and keep the pretreated materials warm and pressurized; a first intermediate cavity is provided in the reciprocating feeding device, and the first intermediate cavity is connected to the high-temperature and high-pressure chamber so that the materials in the high-temperature and high-pressure chamber enter the first intermediate cavity; the steam explosion chamber is connected to the first intermediate cavity; wherein the low-temperature and low-pressure chamber, the high-temperature and high-pressure chamber, the reciprocating feeding device and the steam explosion chamber are connected by a valve member, and after the materials processed in the high-temperature and high-pressure chamber enter the first intermediate cavity, the reciprocating feeding device moves to connect the first intermediate cavity with the steam explosion chamber, and the materials in the first intermediate cavity are instantly depressurized after entering the steam explosion chamber to cause steam explosion.

[0008] In some embodiments, the high-temperature and high-pressure chamber is provided with a first discharge valve and a second discharge valve, the first discharge valve and the second discharge valve are located on the same side of the high-temperature and high-pressure chamber, and the first discharge valve and the second discharge valve are spaced apart along the length direction of the high-temperature and high-pressure chamber, and the reciprocating feeding device is also provided with a second intermediate chamber, the first intermediate chamber can be connected to the high-temperature and high-pressure chamber through the first discharge valve, the second intermediate chamber can be connected to the high-temperature and high-pressure chamber through the second discharge valve, and the second intermediate chamber can also be connected to the steam explosion chamber, and during a reciprocating movement of the reciprocating feeding device, the first intermediate chamber and the second intermediate chamber are respectively connected to the steam explosion chamber once.

[0009] In some embodiments, the distance between the first middle cavity and the second middle cavity is smaller than the distance between the first discharge valve and the second discharge valve.

[0010] In some embodiments, the upper end of the steam explosion chamber protrudes upward to form a connecting tube, the upper end of the connecting tube can be connected to the first intermediate cavity or the second intermediate cavity, and a silencer is provided on the periphery of the connecting tube.

[0011] In some embodiments, the steam explosion chamber is located below the horizon of the working ground to reduce the noise of the steam explosion chamber during steam explosion.

[0012] In some embodiments, a pressure relief mesh is provided on the explosion chamber, and a heat absorption component is provided on the peripheral side of the explosion chamber to absorb the heat generated by the explosion of the material. The heat absorption component includes a heat delivery pipe, which extends and wraps around the outer periphery of the low-temperature and low-pressure chamber to provide heat to the low-temperature and low-pressure chamber.

[0013] In some embodiments, a screw conveyor is provided in both the low-temperature and low-pressure chamber and the high-temperature and high-pressure chamber.

[0014] In some embodiments, the plurality of steam inlets are spaced apart along the length direction of the high-temperature and high-pressure chamber, and the plurality of steam inlets are located on one side of the high-temperature and high-pressure chamber, and the steam inlet and the feed port of the high-temperature and high-pressure chamber are respectively located at both ends of the high-temperature and high-pressure chamber.

[0015] In some embodiments, a discharge mechanism is further included, a steam explosion discharge port is provided at the lower end of the steam explosion chamber, a steam explosion discharge valve is provided on the steam explosion discharge port, and the discharge mechanism can be communicated with the steam explosion chamber.

[0016] In some embodiments, a control device is also included, a steam valve is provided at the steam inlet, the control device is electrically connected to the steam valve and the valve member, and the control device controls the on and off of multiple steam valves respectively to control the temperature changes in different areas of the high-temperature and high-pressure chamber.

[0017] It can be seen from the above technical solution that the present application has at least the following advantages and positive effects:

[0018] In the present application, the material enters the low-temperature and low-pressure chamber for pretreatment, and then enters the high-temperature and high-pressure chamber from the low-temperature and low-pressure chamber for high-temperature and high-pressure treatment and heat preservation and pressure treatment. The material in the high-temperature and high-pressure chamber enters the reciprocating feeder, and the reciprocating feeder is connected to the steam explosion chamber, thereby steam-exploding the material in the reciprocating feeder. On the one hand, the material can allow water molecules to fully penetrate under the high-temperature and high-pressure environment, preventing insufficient steam penetration in the material, improving the material separation rate after steam explosion, and reducing the difference in bamboo steam explosion effects. On the other hand, the batch and multiple steam explosions of the material can reduce the volume of the material for a single steam explosion in the steam explosion chamber without affecting the efficiency of the steam explosion, and reduce the noise generated during the steam explosion. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the continuous steam explosion machine of the present invention.

[0020] Figure 2 yes Figure 1 A magnified view of the structure at center.

[0021] The following are the descriptions of the reference numerals:

[0022] 100, feeder; 200, low-temperature and low-pressure chamber; 210, hopper; 220, screw conveyor; 300, high-temperature and high-pressure chamber; 310, first discharge valve; 320, second discharge valve; 330, screw conveyor; 400, reciprocating discharge device; 410, first intermediate cavity; 420, second intermediate cavity; 500, steam explosion chamber; 510, connecting cylinder; 600, discharge mechanism; 610, discharge conveyor; 620, discharge screw elevator. DETAILED DESCRIPTION

[0023] Typical implementations that embody the features and advantages of the present application will be described in detail in the following description. It should be understood that the present application can have various changes in different implementations without departing from the scope of the present application, and the descriptions and illustrations therein are essentially used for illustrative purposes rather than for limiting the present application.

[0024] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise clearly and specifically defined.

[0025] In the related technology of steam explosion process, the steam explosion machine includes a barrel and a heating and pressurizing bin for accommodating the barrel. First, the material is loaded into the barrel, and the barrel is loaded into the heating and pressurizing bin. Then, the heating and pressurizing bin is closed, and steam is introduced for pressurization and heating for a period of time. Finally, the steam explosion is carried out, and the heating and pressurizing bin is opened, and the barrel is taken out to pour out the material after the steam explosion. However, when the material explodes in the heating and pressurizing bin, due to the production factor, the larger the volume of the explosion chamber is required, the higher the production efficiency is. As the volume increases, the volume of the expanding gas increases exponentially during the explosion, resulting in huge impact noise. And when the material explodes in the heating and pressurizing bin, since there are more materials in the heating and pressurizing bin, the center and edge parts of the material have different explosion effects due to different air resistance during the explosion, resulting in differences in product quality, which is not conducive to the processing and utilization of subsequent processes.

[0026] Figure 1It is a structural schematic diagram of the continuous steam explosion machine of the present invention.

[0027] See also Figure 1 For ease of understanding and description, the working ground is used as a reference, the up and down directions of the working ground are used as the up and down directions below, and the horizon direction of the working ground is used as the horizontal direction below.

[0028] See also Figure 1 The present application provides a continuous steam explosion machine, which includes a feeder 100, a low-temperature and low-pressure chamber 200, a high-temperature and high-pressure chamber 300, a reciprocating feeding device 400, a steam explosion chamber 500, and a discharging mechanism 600. The feeder 100 is used to transport external materials into the low-temperature and low-pressure chamber 200, and perform heating pretreatment in the low-temperature and low-pressure chamber 200. The pretreated materials in the low-temperature and low-pressure chamber 200 are transported to the high-temperature and high-pressure chamber 300, and are subjected to high-temperature and high-pressure treatment and heat preservation and pressure preservation treatment in the high-temperature and high-pressure chamber 300. The reciprocating feeding device 400 can move back and forth so that the materials after the heat preservation and pressure preservation treatment in the high-temperature and high-pressure chamber 300 are input into the reciprocating feeding device 400. During the reciprocating movement, the reciprocating feeding device 400 can be connected to the steam explosion chamber 500, so that the pressure of the materials in the reciprocating feeding device 400 is instantly reduced when falling into the steam explosion chamber 500, and the materials explode. Compared with the large-capacity, one-time steam explosion processing steam explosion machine in the related art, the continuous steam explosion machine of the present application divides the steam explosion process of the material into multiple steam explosions. It can reduce the volume of the material of a single steam explosion in the steam explosion chamber 500 without affecting the steam explosion efficiency, thereby reducing the noise generated during the steam explosion.

[0029] Compared with the steam explosion process in the related art, the processing technology of the present application reduces the process of loading and removing the barrel into the heating and pressurizing bin, and also reduces the process steps of emptying and cleaning the barrel. The effective operation time accounts for a large proportion in the process, and the production efficiency is high. (The effective operation time link is the introduction of steam, pressurization, heating, and steam explosion.)

[0030] See also Figure 1 In this embodiment, the feeder 100 is used to transport materials into the low-temperature and low-pressure chamber 200. It is arranged above the working ground and located on the upper side of the low-temperature and low-pressure chamber 200. In some embodiments, the feeder 100 is a crawler conveyor or a screw elevator, which is used to continuously transport materials into the low-temperature and low-pressure chamber 200 to improve the working efficiency of the continuous steam explosion machine.

[0031] In this embodiment, the low temperature and low pressure chamber 200 is located above the high temperature and high pressure chamber 300, and the low temperature and low pressure chamber 200 extends in the horizontal direction, and the length direction of the low temperature and low pressure chamber 200 is parallel to the horizontal direction. A hopper 210 is provided on the upper side of one end of the low temperature and low pressure chamber 200, and the radius of the hopper 210 gradually increases from bottom to top. When the material falls from the discharge port of the feeder 100 under the action of gravity, it is input into the low temperature and low pressure chamber 200 through the hopper 210 to prevent the material from leaking to the outside.

[0032] A screw conveyor 220 is provided in the low temperature and low pressure chamber 200, and the screw conveyor 220 extends along the length direction of the low temperature and low pressure chamber 200. After the material on the feeder 100 enters the low temperature and low pressure chamber 200, it is conveyed to the other end of the low temperature and low pressure chamber 200 by the screw conveyor 220, so as to facilitate the material to be conveyed to the high temperature and high pressure chamber 300.

[0033] The low temperature and low pressure chamber 200 is also provided with a heating device (not shown in the figure) to pre-heat the materials in the low temperature and low pressure chamber 200, so as to reduce the processing time of the high temperature and high pressure chamber 300 and improve the material processing efficiency. On the one hand, during the transportation of the materials by the screw conveyor 220, the materials will roll and move, and under the action of the heating device, the pre-treated materials can be fully heated to improve the overall work efficiency during the material explosion process. On the other hand, the low temperature and low pressure chamber 200 can play the role of temporarily storing materials to ensure the stable supply of materials for the continuous steam explosion machine.

[0034] The screw conveyor 220 includes a rotating shaft (not shown in the figure), a screw conveying piece (not shown in the figure) and a power source (not shown in the figure). The rotating shaft extends along the length direction of the low-temperature and low-pressure chamber 200 to penetrate the low-temperature and low-pressure chamber 200. The screw conveying piece extends along the circumferential spiral of the rotating shaft. The power source is connected to the screw conveyor 220 to drive the rotating shaft to rotate, so that the screw conveying piece rotates around the axis of the rotating shaft. When the screw conveying piece rotates, the material moves under the action of the screw conveying piece.

[0035] In some embodiments, the length direction of the low-temperature and low-pressure chamber 200 is at an angle to the horizontal direction, so that the materials in the low-temperature and low-pressure chamber 200 can move under the action of gravity, thereby improving the transportation efficiency of the screw conveyor 220. In some embodiments, the low-temperature and low-pressure chamber 200 is provided with one end of the hopper 210 lower than the other end of the low-temperature and low-pressure chamber 200.

[0036] Figure 2 yes Figure 1 A magnified view of the structure at center.

[0037] See also Figure 1 and Figure 2In this embodiment, the high temperature and high pressure chamber 300 is located below the low temperature and low pressure chamber 200, and the high temperature and high pressure chamber 300 is connected to the end of the low temperature and low pressure chamber 200 away from the hopper 210 through a valve member, and the high temperature and high pressure chamber 300 extends in the horizontal direction, and the length direction of the high temperature and high pressure chamber 300 is parallel to the horizontal direction. In some embodiments, there is an angle between the length direction of the high temperature and high pressure chamber 300 and the horizontal angle of the working ground to facilitate the transportation of materials in the high temperature and high pressure chamber 300.

[0038] The valve member connected between the inlet of the high-temperature and high-pressure chamber 300 and the outlet of the low-temperature and low-pressure chamber 200 is a star-shaped discharge valve, so that when there is a pressure difference between the high-temperature and high-pressure chamber 300 and the low-temperature and low-pressure chamber 200, the material can be input from the low-temperature and low-pressure chamber 200 into the high-temperature and high-pressure chamber 300. In addition, the star-shaped discharge valve can isolate the low-temperature and low-pressure chamber 200 from the high-temperature and high-pressure chamber 300.

[0039] See also Figure 1 and Figure 2 In this embodiment, the high temperature and high pressure chamber 300 is provided with a first discharge valve 310 and a second discharge valve 320, which can transport the material in the high temperature and high pressure chamber 300 to the reciprocating discharge device 400. The first discharge valve 310 and the second discharge valve 320 are located at one end of the high temperature and high pressure chamber 300 away from its feed inlet, and the first discharge valve 310 and the second discharge valve 320 are spaced apart along the length direction of the high temperature and high pressure chamber 300.

[0040] The high-temperature and high-pressure chamber 300 is provided with a plurality of steam inlets (not shown in the figure), which are connected to an external steam source so that external high-temperature and high-pressure steam can enter the high-temperature and high-pressure chamber 300 through the steam inlets, so as to perform heating and pressurizing treatment and heat and pressure preservation treatment on the pretreated materials.

[0041] Multiple steam inlets are arranged at intervals along the length direction of the high temperature and high pressure chamber 300, and the multiple steam inlets are located on the same side of the high temperature and high pressure chamber 300. The steam inlet and the inlet of the star-shaped unloading valve on the high temperature and high pressure chamber 300 are respectively located at both ends of the high temperature and high pressure chamber 300. A steam valve (not shown in the figure) is provided at the steam inlet. The continuous steam explosion machine can control the pressure and flow of each steam inlet by adjusting the steam valve to achieve heating and pressurization of each part in the high temperature and high pressure chamber 300.

[0042] The steam input from the steam inlet diffuses from one end of the high-temperature and high-pressure chamber 300 to the other end, so that in the process of the material moving from the feed port toward the first discharge valve 310 and the second discharge valve 320 in the high-temperature and high-pressure chamber 300, the steam gradually penetrates into the pores and cell walls between the fibers under the action of the steam, and produces hydrogen bonds with some hydroxyl groups in the cellulose. Under the combined action of water vapor and heat, cellulose, hemicellulose and lignin begin to soften and degrade, low molecular substances begin to dissolve, and the connection between fibers begins to weaken. The steam gradually penetrates into the gaps and cell walls of the material to facilitate the subsequent steam explosion process.

[0043] A screw conveyor 330 is provided in the high temperature and high pressure chamber 300, so that the material entering the high temperature and high pressure chamber 300 can be transported from the inlet of the high temperature and high pressure chamber 300 to the first discharge valve 310 and the second discharge valve 320 under the action of the screw conveyor 330. In some embodiments, the first discharge valve 310 and the second discharge valve 320 are also star-shaped discharge valves to enhance the connection strength between the high temperature and high pressure chamber 300 and the reciprocating discharge device 400.

[0044] In this embodiment, the reciprocating feeding device 400 is located below the high temperature and high pressure chamber 300, and one end of the first discharge valve 310 and the second discharge valve 320 are arranged near the high temperature and high pressure chamber 300. The reciprocating feeding device 400 extends along the length direction of the high temperature and high pressure chamber 300 and can reciprocate along the length direction of the high temperature and high pressure chamber 300.

[0045] The reciprocating feeding device 400 is provided with a first intermediate cavity 410 and a second intermediate cavity 420, and the first intermediate cavity 410 and the second intermediate cavity 420 are arranged at intervals along the length direction of the reciprocating feeding device 400. The spacing between the first intermediate cavity 410 and the second intermediate cavity 420 is smaller than the spacing between the first discharge valve 310 and the second discharge valve 320. The first intermediate cavity 410 can be connected to the high temperature and high pressure chamber 300 through the first discharge valve 310, and the second intermediate cavity 420 can be connected to the high temperature and high pressure chamber 300 through the second discharge valve 320. The first intermediate cavity 410 and the second intermediate cavity 420 can also be connected to the steam explosion chamber 500.

[0046] During a reciprocating movement of the reciprocating feeding device 400, the first intermediate cavity 410 is spaced from the second intermediate cavity 420 and is connected to the high temperature and high pressure chamber 300. When the reciprocating feeding device 400 moves along its length direction, first, the first intermediate cavity 410 is connected to the high temperature and high pressure chamber 300, and the material in the high temperature and high pressure chamber 300 enters the first intermediate cavity 410 through the first discharge valve 310. The second intermediate cavity 420 is connected to the steam explosion chamber 500, and the material in the second intermediate cavity 420 enters the steam explosion chamber 500 and steam explosion occurs. Then the reciprocating feeding device 400 is reset, so that the first intermediate cavity 410 is connected to the steam explosion chamber 500, the material in the first intermediate cavity 410 enters the steam explosion chamber 500 and steam explosion occurs, and the second intermediate cavity 420 is connected to the high temperature and high pressure chamber 300, and the material in the high temperature and high pressure chamber 300 enters the second intermediate cavity 420. The interval operation of the first intermediate cavity 410 and the second intermediate cavity 420 can improve the working efficiency of the continuous steam explosion machine.

[0047] In some embodiments, the reciprocating feeding device 400 is provided with valves on the first intermediate cavity 410 and the second intermediate cavity 420 facing the steam explosion chamber 500, respectively, and the first intermediate cavity 410 and the second intermediate cavity 420 are detachably connected to the steam explosion chamber 500 through the valves. In other embodiments, a driving device (not shown in the figure) is provided outside the reciprocating feeding device 400, and the driving device is transmission-connected to the reciprocating feeding device 400 to drive the reciprocating feeding device 400 to reciprocate.

[0048] See also Figure 1 and Figure 2 In this embodiment, the explosion chamber 500 is located below the reciprocating feeding device 400, and the explosion chamber 500 can be connected to the first intermediate chamber 410 and the second intermediate chamber 420 respectively, so that the materials in the first intermediate chamber 410 and the second intermediate chamber 420 are instantly depressurized and exploded after falling into the explosion chamber 500. The first intermediate chamber 410 and the second intermediate chamber 420 are separated and connected to the explosion chamber 500, thereby reducing the noise during the explosion and improving the explosion efficiency of the continuous explosion machine.

[0049] After the first intermediate cavity 410 and the second intermediate cavity 420 are connected to the steam explosion chamber 500, the material enters the steam explosion chamber 500, and the pressure inside the material is greater than the pressure inside the steam explosion chamber 500. At this time, the steam in the material begins to escape and release pressure. When this process occurs suddenly in a short period of time, the internal steam of the material cells does not have time to be released from the pores, and the huge pressure of the steam will cause the material cells to explode. Under the action of high temperature and high pressure, the cellulose, hemicellulose and lignin structures of the cells are destroyed, the hydrogen bonds between the cellulose are interrupted, and the connection between the fibers is reduced, so that the cellulose, hemicellulose and lignin are separated. This is to facilitate the screening of cellulose, hemicellulose and lignin later.

[0050] See also Figure 1 and Figure 2 In this embodiment, the explosion chamber 500 is located below the horizon of the working ground to reduce the noise of the explosion chamber 500. The upper end of the explosion chamber 500 protrudes upward to form a connecting tube 510, the upper end of the connecting tube 510 can be connected to the first middle cavity 410 or the second middle cavity 420, and the outer periphery of the connecting tube 510 is provided with a silencer (not shown in the figure).

[0051] The explosion chamber 500 is provided with a pressure relief mesh, and a heat absorption component is provided on the periphery of the explosion chamber 500 to absorb the heat when the material explodes. When the material explodes, the steam in the material diffuses into the explosion chamber 500 and is discharged to the outside through the pressure relief mesh. In some embodiments, there are multiple pressure relief meshes, and the multiple pressure relief meshes are arranged at intervals on the periphery of the explosion chamber 500.

[0052] The heat absorption assembly (not shown in the figure) includes a heat absorption pipe network and a heat delivery pipe, and the heat absorption pipe network is connected to the heat delivery pipe. The heat absorption pipe network is arranged on the periphery of the steam explosion chamber 500 to absorb the heat when the material explodes. The heat delivery pipe extends and wraps around the periphery of the low-temperature and low-pressure chamber 200 to provide the heat absorbed by the heat absorption pipe network to the low-temperature and low-pressure chamber 200, thereby improving the recycling of the heat of the continuous steam explosion machine, improving energy utilization, and reducing production costs. In some embodiments, the heat absorption pipe network is used to absorb the steam discharged to the outside from the pressure relief mesh and transmit it to the heat delivery pipe.

[0053] In some embodiments, the heat absorption component and the heating device exist at the same time, and the heating device is used to stabilize the temperature in the low-temperature and low-pressure chamber 200. In some embodiments, only the heat absorption component is provided on the continuous steam explosion machine.

[0054] See also Figure 1 In this embodiment, the discharge mechanism 600 is provided with a steam explosion discharge port at the lower end of the steam explosion chamber 500, and a steam explosion discharge valve is provided on the steam explosion discharge port, and the discharge mechanism 600 can be connected with the steam explosion chamber 500. The discharge mechanism 600 includes a discharge conveyor 610 and a discharge screw elevator 620. The discharge conveyor 610 is located below the steam explosion chamber 500 and is connected with the steam explosion discharge valve. The discharge conveyor 610 extends in the horizontal direction, and transports the material in the steam explosion chamber 500 in a direction away from the steam explosion chamber 500, and transports it to the discharge screw elevator 620.

[0055] In some embodiments, the discharge conveyor 610 may be a screw conveyor. The screw conveyor may also be a crawler conveyor, as long as it can achieve the function of conveying the materials to the horizon of the working ground.

[0056] The discharge screw elevator 620 extends in the up-down direction, one end of which is located below the working floor and is connected to the discharge conveyor 610; the other end of the discharge screw elevator 620 is located above the working floor to transport the materials conveyed by the discharge conveyor 610 to the outside world for the convenience of subsequent processes. In some embodiments, a working chamber is provided below the horizon of the working floor, and the working chamber is used to accommodate the steam explosion chamber 500, the discharge conveyor 610 and part of the discharge screw elevator 620.

[0057] In some embodiments, temperature sensors are provided on the low-temperature and low-pressure chamber 200, the high-temperature and high-pressure chamber 300 and the steam explosion chamber 500 for real-time monitoring of the temperature on the low-temperature and low-pressure chamber 200, the high-temperature and high-pressure chamber 300 and the steam explosion chamber 500, thereby facilitating the adjustment of the temperature inside the low-temperature and low-pressure chamber 200 and the high-temperature and high-pressure chamber 300.

[0058] In this embodiment, the continuous steam explosion machine also includes a control device (not shown in the figure), which is located on the working ground for the convenience of the operator. The control device can be electrically connected to the feeder 100, the low-temperature and low-pressure chamber 200, the high-temperature and high-pressure chamber 300, the reciprocating feeding device 400, the steam explosion chamber 500, and the discharging mechanism 600, so as to control the start and stop and operation of each device, and can also be electrically connected to the valves between the low-temperature and low-pressure chamber 200, the high-temperature and high-pressure chamber 300, the reciprocating feeding device 400, and the steam explosion chamber 500 to control the on and off between the devices.

[0059] In some embodiments, the control device is electrically connected to the steam valve to control the input of steam into the high temperature and high pressure chamber 300. The control device can adjust the temperature changes of different areas in the high temperature and high pressure chamber 300 in real time to improve the efficiency of steam penetration into the material.

[0060] In another embodiment of the present application, the reciprocating feeding device 400 is provided with only a first intermediate cavity 410, and the first intermediate cavity 410 is connected to the high temperature and high pressure chamber 300, so that the material in the high temperature and high pressure chamber 300 enters the first intermediate cavity 410; the steam explosion chamber 500 is connected to the first intermediate cavity 410. After the processed material in the high temperature and high pressure chamber 300 enters the first intermediate cavity 410, the reciprocating feeding device 400 moves to connect the first intermediate cavity 410 with the steam explosion chamber 500, and the material in the first intermediate cavity 410 enters the steam explosion chamber 500 for steam explosion.

[0061] See also Figure 1 and Figure 2 In the present invention, a continuous steam explosion machine is provided, wherein the material enters one end of the low temperature and low pressure chamber 200 through the feeder 100, and moves toward the other end of the low temperature and low pressure chamber 200 under the action of the screw conveyor 220 in the low temperature and low pressure chamber 200. The material is pre-heated in the low temperature and low pressure chamber 200 to facilitate subsequent processing in the high temperature and high pressure chamber 300 and improve work efficiency.

[0062] The material enters the high temperature and high pressure chamber 300 from the low temperature and low pressure chamber 200 through the star-shaped discharge valve, and moves toward the first discharge valve and the second discharge valve under the action of the screw conveyor 330 in the high temperature and high pressure chamber 300. The material is gradually infiltrated by steam during the movement in the high temperature and high pressure chamber 300. The continuous steam explosion machine can adjust the temperature and pressure of different areas in the high temperature and high pressure chamber 300 in real time by controlling the flow rate and pressure of the steam input at the steam inlet, so as to improve the efficiency of steam infiltration into the material.

[0063] When the material moves to one end of the high temperature and high pressure chamber 300 where the first discharge valve and the second discharge valve are set. First, the reciprocating discharge device 400 moves, the first intermediate cavity 410 is connected with the first discharge valve, and the material enters the first intermediate cavity 410 through the first discharge valve; the second intermediate cavity 420 is connected with the steam explosion cavity. Then the reciprocating discharge device 400 resets and moves, so that the first intermediate cavity 410 is connected with the steam explosion cavity, and the material in the first intermediate cavity 410 enters the steam explosion chamber 500 and explodes in the steam explosion chamber 500; the second intermediate cavity 420 is connected with the second discharge valve, and the material in the high temperature and high pressure chamber 300 enters the second intermediate cavity 420 through the second discharge valve. The reciprocating discharge device 400 reciprocates to make the steam explosion chamber 500 cyclically explode, thereby improving the working efficiency of the continuous steam explosion machine.

[0064] In the present application, the material enters the low-temperature and low-pressure chamber 200 for pretreatment, and then enters the high-temperature and high-pressure chamber 300 from the low-temperature and low-pressure chamber 200 for high-temperature and high-pressure treatment and heat preservation and pressure treatment. Part of the material in the high-temperature and high-pressure chamber 300 enters the reciprocating feeder, and the reciprocating feeder is connected to the steam explosion chamber 500, so as to steam explode the material in the reciprocating feeder. On the one hand, the material in the high-temperature and high-pressure chamber 300 can be fully processed under a high-temperature and high-pressure environment to prevent insufficient steam penetration in the material, improve the material separation rate after the steam explosion, and reduce the difference in the steam explosion effect of bamboo. On the other hand, the batch and multiple steam explosions of the materials can reduce the volume of the single steam explosion material in the steam explosion chamber 500 without affecting the efficiency of the steam explosion, and reduce the noise generated during the steam explosion.

[0065] Although the present application has been described with reference to several typical embodiments, it should be understood that the terms used are illustrative and exemplary, rather than restrictive. Since the present application can be implemented in a variety of forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims, so all changes and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.

Claims

1. A continuous steam explosion machine, characterized in that: include: A low temperature and low pressure chamber, which is used to contain materials and preheat the materials; A high-temperature and high-pressure chamber is connected to the low-temperature and low-pressure chamber. The material pre-treated in the low-temperature and low-pressure chamber enters the high-temperature and high-pressure chamber. The high-temperature and high-pressure chamber is provided with a plurality of steam inlets for heating, pressurizing and maintaining the temperature and pressure of the pre-treated material. A reciprocating feeding device, wherein a first intermediate cavity is provided therein, and the first intermediate cavity is communicated with the high-temperature and high-pressure chamber so that the material in the high-temperature and high-pressure chamber enters the first intermediate cavity; a steam explosion chamber, which is in communication with the first intermediate cavity; The low-temperature and low-pressure chamber, the high-temperature and high-pressure chamber, the reciprocating feeding device and the steam explosion chamber are connected by a valve. After the material processed in the high-temperature and high-pressure chamber enters the first intermediate chamber, the reciprocating feeding device moves to connect the first intermediate chamber with the steam explosion chamber. The material in the first intermediate chamber is instantly depressurized and explodes after entering the steam explosion chamber. The high-temperature and high-pressure chamber is provided with a first discharge valve and a second discharge valve, the first discharge valve and the second discharge valve are located on the same side of the high-temperature and high-pressure chamber, and the first discharge valve and the second discharge valve are spaced apart along the length direction of the high-temperature and high-pressure chamber, and a second intermediate cavity is also provided in the reciprocating feeding device, the first intermediate cavity can be communicated with the high-temperature and high-pressure chamber through the first discharge valve, the second intermediate cavity can be communicated with the high-temperature and high-pressure chamber through the second discharge valve, and the second intermediate cavity can also be communicated with the steam explosion chamber, and during one reciprocating movement of the reciprocating feeding device, the first intermediate cavity and the second intermediate cavity are respectively connected with the steam explosion chamber once; The distance between the first middle cavity and the second middle cavity is smaller than the distance between the first discharge valve and the second discharge valve.

2. The continuous steam explosion machine according to claim 1, characterized in that: The upper end of the steam explosion chamber protrudes upward to form a connecting tube, the upper end of the connecting tube can be connected to the first intermediate cavity or the second intermediate cavity, and a silencer is arranged on the outer periphery of the connecting tube.

3. The continuous steam explosion machine according to claim 1, characterized in that: The steam explosion chamber is located below the horizon of the working ground to reduce the noise of the steam explosion chamber during steam explosion.

4. The continuous steam explosion machine according to claim 3, characterized in that: The explosion chamber is provided with a pressure relief mesh, and a heat absorption component is provided on the periphery of the explosion chamber to absorb the heat when the material explodes. The heat absorption component includes a heat delivery pipe, which extends and winds around the outer periphery of the low-temperature and low-pressure chamber to provide heat for the low-temperature and low-pressure chamber.

5. The continuous steam explosion machine according to claim 1, characterized in that: The low-temperature and low-pressure chamber and the high-temperature and high-pressure chamber are both provided with a screw conveyor.

6. The continuous steam explosion machine according to claim 1, characterized in that: The multiple steam inlets are arranged at intervals along the length direction of the high-temperature and high-pressure chamber, and the multiple steam inlets are located on one side of the high-temperature and high-pressure chamber. The steam inlet and the feed port of the high-temperature and high-pressure chamber are respectively located at both ends of the high-temperature and high-pressure chamber.

7. The continuous steam explosion machine according to claim 1, characterized in that: It also includes a discharge mechanism, a steam explosion discharge port is provided at the lower end of the steam explosion chamber, a steam explosion discharge valve is provided on the steam explosion discharge port, and the discharge mechanism can be communicated with the steam explosion chamber.

8. The continuous steam explosion machine according to claim 1, characterized in that: It also includes a control device, a steam valve is provided at the steam inlet, the control device is electrically connected to the steam valve and the valve member, and the control device controls the on and off of multiple steam valves respectively to control the temperature changes in different areas of the high-temperature and high-pressure chamber.

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