An apparatus system for continuously preparing biomass fuel

Abstract

The present invention provides a device system for continuously preparing biomass fuel. The device system includes a biomass crushing device (1), a pre-washing device (3), a pre-dewatering device (4), a buffer silo (5), a continuous feeding device (6), a hydrothermal treatment device (8), a cooling and discharging device (9), and a solid-liquid separation device (10) which are connected in sequence. The device system of the present invention can continuously prepare biomass fuel with a high dry basis energy density and a low inorganic salt ion content. During the operation of the device system, the water consumption is small, the energy consumption is low, and the operation is stable, having a large-scale popularization and application prospect.

Description

Technical Field

[0001] The present invention relates to the technical field of biomass fuels, and particularly to a device system for continuously preparing biomass fuels. Background Art

[0002] Straw has characteristics such as large volume, low density, and low energy density. The high storage and transportation costs severely restrict the energy utilization of straw, which is an urgent problem to be solved at present.

[0003] Straw contains a large amount of alkali metal ions such as potassium and sodium and chloride ions, and the content of both is above 1 wt%. Potassium and sodium ions are the main reasons for the low ash melting point after straw combustion. When the chlorine content in the fuel is greater than 0.3 wt%, the tendency of high-temperature corrosion is serious.

[0004] CN104690068A discloses a method for preparing hydrochar from biomass, which includes the following steps:

[0005] (1) Heating for liquefaction and humification in an oxygen-deficient atmosphere, and separating the obtained solid-liquid mixture product by vacuum filtration to obtain a primary liquefaction product and a solid humification material; (2) subjecting the primary liquefaction product obtained in step (1) to membrane separation, and then obtaining a soluble sugar concentrate and a remaining separation liquid through dialysis and / or electrodialysis and / or nanofiltration; (3) adding the remaining separation liquid obtained in step (2) and 0-10% of the water used in step (1) to a reaction kettle, and then heating and humifying with the humification material obtained in step (1) in an oxygen-deficient atmosphere, and filtering and centrifuging the product to obtain a secondary liquefaction product and hydrochar. The method can use no catalyst other than water, has a simple process, is environmentally friendly, has a high biomass conversion rate and resource utilization rate, and has industrial application potential. However, the energy density of the finally obtained hydrochar is relatively low.

[0006] CN103386411A discloses a hydrothermal treatment method and system for biomass waste. The method includes: the material sequentially undergoes pulping preheating treatment, high-pressure steam hydrothermal treatment and flash evaporation treatment, and the steam used in the hydrothermal treatment includes primary steam and secondary steam. The secondary steam utilizes the steam pressure difference between hydrothermal reaction devices to equalize the pressure and temperature of the steam in two hydrothermal reaction devices. Through multi-stage pressure equalization between hydrothermal reactors, the heat exchange efficiency is improved and the consumption of primary steam is reduced. However, the hydrothermal treatment system still has problems such as large water consumption and high heat consumption, and needs to be further optimized.

[0007] Therefore, it is of great significance to develop a device system for continuously preparing biomass fuels with high production efficiency and low energy consumption, which can greatly improve the dry basis energy density of biomass fuels and reduce the inorganic salt content in biomass fuels. Summary of the Invention

[0008] In view of the problems existing in the prior art, the present invention provides a device system for continuously preparing biomass fuel. After a series of pretreatment processes such as crushing, pre-washing, and pre-dehydration of biomass raw materials, hydrothermal treatment is carried out, realizing the continuous preparation of biomass fuel with high preparation efficiency and low energy consumption. The obtained biomass fuel has a high dry basis energy density and a low inorganic salt content.

[0009] To achieve this purpose, the present invention adopts the following technical solutions:

[0010] The present invention provides a device system for continuously preparing biomass fuel. The device system includes a biomass crushing device, a pre-washing device, a pre-dehydration device, a buffer silo, a continuous feeding device, a hydrothermal treatment device, a cooling and discharging device, and a solid-liquid separation device connected in sequence.

[0011] The device system for continuously preparing biomass fuel according to the present invention sequentially crushes, pre-washes and separates, and pre-dehydrates biomass raw materials, and then performs hydrothermal treatment in a specific hydrothermal treatment device. The dry basis energy density of the prepared biomass fuel is increased, and the inorganic salt content is reduced, especially the contents of chloride ions and potassium ions are greatly reduced. The device system of the present invention solves the problems of large water consumption, high energy consumption, and unstable system operation existing in the prior art in the continuous production system of hydrothermally treating biomass.

[0012] The function of the biomass crushing device of the present invention is to process biomass raw materials into appropriate particle sizes, ensure the stability of biomass raw materials entering the pressurized hydrothermal reaction vessel, and promote the penetration of high-temperature water into the interior of biomass to accelerate the hydrothermal reaction process, thereby shortening the preparation time, improving the preparation efficiency, and reducing the preparation cost.

[0013] Preferably, a biomass conveying device is provided between the biomass crushing device and the pre-washing device.

[0014] Preferably, the biomass conveying device includes a conveyor belt or a conveying chain.

[0015] Preferably, the device system further includes an anti-steam backflow spraying device.

[0016] Preferably, the anti-steam backflow spraying device is respectively connected to the continuous feeding device and the hydrothermal treatment device.

[0017] The anti-steam backflow spraying device of the present invention is used to monitor the pressure at the feeding end and the discharging end of the continuous feeding device and the current of the motor in real time. When an abnormality occurs, the feeding is aborted.

[0018] Preferably, the anti-steam backflow spraying device includes a pressure sensor, a current detector, a quick isolation valve, and a pneumatic actuator.

[0019] The pressure sensor in the anti-steam backflow device of the present invention is used to monitor the pressure at the feeding end and the discharging end of the continuous feeding device in real time and calculate the pressure difference. When the pressure difference is less than the difference between the pressure during the operation of the hydrothermal treatment device and the atmospheric pressure, it is regarded as abnormal.

[0020] When the current detector in the anti-steam backflow device of the present invention detects that the current of the main motor of the continuous feeding device drops to 70% of the normal operation current, it is regarded as abnormal.

[0021] The pneumatic actuator in the anti-steam backflow device of the present invention is used to receive the abnormal signal and push the quick isolation valve to start to abort the discharging of the continuous feeding device.

[0022] In this application, the anti-steam backflow device detects the current magnitude and the pressure difference between the feeding ports simultaneously. When the feeding is not smooth and material plugging and slipping occur, the motor current will drop significantly and the pressure difference will decrease significantly. These are the most direct feedback signals, which can ensure that the feeding failure is discovered in the first time and the safety of the equipment and personnel is guaranteed.

[0023] Preferably, the anti-steam backflow device includes a pressure sensor, a current detector, a quick isolation valve and a pneumatic actuator.

[0024] Preferably, the pressure sensor is arranged at the inlet and outlet of the continuous feeding device.

[0025] Preferably, the current detector monitors the motor current of the continuous feeding device and feeds it back to the control system of the complete set of devices in real time.

[0026] The quick isolation valve and the pneumatic actuator in the present invention are integrated, which is equivalent to the pneumatic actuator providing the driving force for the action of the quick isolation valve.

[0027] Preferably, the biomass crushing device includes a knife roll cutting device or a hydraulic extrusion crushing device.

[0028] The length of the biomass processed by the biomass crushing device of the present invention is ≤ 10 cm, for example, it can be 10 cm, 9 cm, 8 cm, 7 cm, 5 cm or 2 cm, etc., but not limited to the listed values, and other unlisted values within this numerical range are equally applicable; the diameter is ≤ 2 cm, for example, it can be 2 cm, 1.8 cm, 1.5 cm, 1.3 cm, 1 cm or 0.5 cm, etc., but not limited to the listed values, and other unlisted values within this numerical range are equally applicable

[0029] Preferably, the pre-washing device includes a pre-washing tank and a guide wheel arranged in the pre-washing tank.

[0030] Preferably, one side of the pre-washing tank is the feeding port and the other side is the discharging port. The washing soaking time during the washing process can be controlled by controlling the rotation speed of the guide wheel.

[0031] Preferably, the inner wall cross-section of the pre-washing tank is arc-shaped.

[0032] Preferably, a slag discharge port is provided at the bottom of the pre-washing tank.

[0033] Preferably, the material guiding runner includes a rotating shaft and material guiding fan blades fixedly connected to one end of the rotating shaft.

[0034] The pre-washing device of the present invention washes the biomass raw materials. During the washing process, impurities such as sediment and bricks in the biomass are removed by the gravity difference. The crushed biomass enters through the feed port of the pre-washing tank. As the material guiding runner rotates, the material guiding fan blades push the lighter and floating biomass raw materials to rotate, while the heavier impurities such as sediment and bricks are thrown onto the inner wall of the pre-washing tank 31 under the action of gravity. These impurities slide down along the inner wall to the bottom end and are discharged from the slag discharge port.

[0035] Preferably, the number of the material guiding fan blades is 5 - 15, for example, it can be 5, 6, 8, 10, 12 or 15, etc.

[0036] Preferably, the other end of the material guiding fan blade extends towards the inner wall of the pre-washing tank but does not touch the inner wall.

[0037] The washing water of the pre-washing device of the present invention is preferably hot water. The hot water helps the soaking of the biomass and the detachment of impurities from the biomass, but it must be liquid water and cannot be steam. When the biomass raw materials are pre-washed in the pre-washing tank, the water temperature ≤ 90 °C, for example, it can be 90 °C, 88 °C, 70 °C, 60 °C, 50 °C or 40 °C, etc., but is not limited to the listed values, and other unlisted values within this value range are equally applicable; the liquid-solid ratio ≥ 3:1, for example, it can be 3:1, 3.5:1, 4:1, 5:1, 6:1 or 7:1, etc., but is not limited to the listed values, and other unlisted values within this value range are equally applicable. The liquid-solid ratio refers to the weight ratio of liquid water to biomass solid raw materials, and the unit is kg / kg.

[0038] In the present invention, the concentration of inorganic salt ions in the biomass raw materials will vary due to different pre-washing water temperatures and soaking times.

[0039] Preferably, the pre-dewatering device includes a gravity dewatering device or a mechanical extrusion dewatering device.

[0040] The pre-dewatering device of the present invention is used to reduce the moisture content of the biomass entering the continuous feeding device and prevent problems such as the rotation and slipping of the materials in the continuous feeding device, poor feeding, and unstable system operation due to excessive moisture of the materials.

[0041] The biomass content in the discharged material after being processed by the pre-dehydration device of the present invention is ≥10 wt%, for example, it can be 10 wt%, 15 wt%, 17 wt%, 20 wt%, 25 wt% or 30 wt% etc., but is not limited to the listed values, and other unlisted values within this value range are equally applicable.

[0042] Preferably, a metering feeding device is arranged between the buffer bin and the continuous feeding device.

[0043] Preferably, the continuous feeding device includes a spiral continuous feeding device.

[0044] The present invention preferably includes a spiral continuous feeding device in the continuous feeding device, which mainly continuously compresses and extrudes the biomass raw material by changing the diameter and pitch of the spiral, so that the density of the biomass raw material continuously increases, and the increased friction between the compacted biomass raw material and the pipe wall seals the high-temperature and high-pressure steam in the hydrothermal treatment device.

[0045] The compression ratio of the spiral continuous feeding device of the present invention is ≥2:1, for example, it can be 2:1, 2.5:1, 3:1, 3.5:1, 4:1 or 5:1 etc., but is not limited to the listed values, and other unlisted values within this value range are equally applicable; the moisture content of the material in the discharged material after being processed by the continuous feeding device is ≤60 wt%, for example, it can be 60 wt%, 55 wt%, 52 wt%, 50 wt%, 40 wt% or 30 wt% etc., but is not limited to the listed values, and other unlisted values within this value range are equally applicable.

[0046] Preferably, the number of the hydrothermal treatment devices is at least 1 group, for example, it can be 1 group, 3 groups or 4 groups etc.

[0047] In the present invention, the arrangement modes of 2 or more groups of hydrothermal treatment devices can be selected according to needs, and can be the same or different, which is beneficial to controlling the soaking degree and time of the material and beneficial to controlling the reaction process.

[0048] Preferably, the number of reaction vessels in each group of hydrothermal treatment devices is at least 1, for example, it can be 1, 2, 3 or 4 etc.

[0049] Preferably, a scraper or a screw propelling component is arranged in the hydrothermal treatment device, and the residence time of the material in the reaction vessel can be accurately adjusted by changing the speed of the scraper chain or the screw shaft driving motor.

[0050] Preferably, the hydrothermal treatment device is arranged obliquely, and the material is fully soaked at the bottom to promote the uniformity of the hydrothermal reaction.

[0051] Preferably, the inclination angle between the central axis of the hydrothermal treatment device and the ground is ≤60°, for example, it can be 60°, 58°, 55°, 50°, 40°, 30° or 20°, etc., but is not limited to the listed values, and other unlisted values within this value range are equally applicable.

[0052] In the present invention, it is preferred that the inclination angle between the central axis of the hydrothermal treatment device and the ground is ≤60°, which can promote the rough separation of moisture in the material at the outlet end by gravity, thereby improving the dryness of the outlet material.

[0053] During the hydrothermal treatment in the hydrothermal treatment device of the present invention, the pressure is controlled to be 0.8 - 3 MPa, for example, it can be 0.8 MPa, 1 MPa, 1.5 MPa, 2 MPa, 2.5 MPa or 3 MPa, etc., but is not limited to the listed values, and other unlisted values within this value range are equally applicable; the temperature of water is 160 - 230 °C, for example, it can be 160 °C, 180 °C, 190 °C, 200 °C, 220 °C or 230 °C, etc., but is not limited to the listed values, and other unlisted values within this value range are equally applicable; the liquid-solid ratio is (3 - 8):1, for example, it can be 3:1, 4:1, 5:1, 6:1, 7:1 or 8:1, etc., but is not limited to the listed values, and other unlisted values within this value range are equally applicable; the reaction time is 10 - 90 min, for example, it can be 10 min, 20 min, 30 min, 40 min, 50 min, 80 min or 90 min, etc., but is not limited to the listed values, and other unlisted values within this value range are equally applicable.

[0054] Preferably, the cooling and discharging device is connected to a cold water pipeline.

[0055] In the present invention, it is preferred that the cooling and discharging device is connected to a cold water pipeline, and its main function is to cool the mixture after hydrothermal treatment to below 90 °C.

[0056] Preferably, the solid-liquid separation device is connected to a liquid return pipeline.

[0057] Preferably, the liquid return pipeline is respectively connected to the hydrothermal treatment device and the pre-washing device.

[0058] Preferably, a pump and / or a heat exchange component are provided on the liquid return pipeline.

[0059] The pump described in the present invention is used to provide pressure, and the heat exchange component is used to heat up the liquid after solid-liquid separation before it enters the hydrothermal treatment device or the pre-washing device. Since the liquid after solid-liquid separation still maintains a relatively high temperature and pressure, this high-temperature and high-pressure water can be directly replenished into the reaction system or provide a large amount of heating heat for low-temperature water replenishment in the reaction system, solving the problem of low heat recovery rate of non-Newtonian fluid slurry materials, improving the heat recovery rate of the entire device system, and reducing energy consumption.

[0060] Compared with the prior art, the present invention has at least the following beneficial effects:

[0061] (1) The biomass fuel obtained by the device system for continuously preparing biomass fuel provided by the present invention has a high dry basis energy density, and the contents of chloride ions and potassium ions in the biomass fuel are greatly reduced;

[0062] (2) The device system for continuously preparing biomass fuel provided by the present invention has high production efficiency, small water consumption, low system energy consumption, stable operation, and is suitable for large-scale popularization and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0063] Figure 1 is a schematic structural diagram of the device system for continuously preparing biomass fuel in the specific embodiment of the present invention.

[0064] Figure 2 is a schematic structural diagram of the pre-washing device in the specific embodiment of the present invention.

[0065] In the figure: 1 - biomass crushing device; 2 - biomass conveying device; 3 - pre-washing device; 31 - pre-washing tank; 311 - slag discharge port; 32 - guide wheel; 321 - rotating shaft; 322 - guide fan blade; 4 - pre-dehydration device; 5 - buffer bin; 6 - continuous feeding device; 7 - anti-steam backflow device; 8 - hydrothermal treatment device; 9 - cooling and discharging device; 10 - solid-liquid separation device; 11 - heat exchange component. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0066] The technical solution of the present invention will be further described below in conjunction with the drawings and through specific embodiments.

[0067] The present invention will be further described in detail below. However, the following examples are only simple examples of the present invention and do not represent or limit the scope of the protection of the present invention. The scope of protection of the present invention is subject to the claims.

[0068] It should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "set", "connected", and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] Those skilled in the art should understand that the present invention necessarily includes the necessary pipelines, conventional valves, and general pump equipment for realizing the complete process. However, the above contents do not belong to the main inventive points of the present invention. Those skilled in the art can add and arrange them by themselves based on the process flow and equipment structure selection. The present invention has no special requirements and specific limitations on this.

[0070] As a specific embodiment of the present invention, a device system for continuously preparing biomass fuel is provided, and its structural schematic diagram is as Figure 1 shown.

[0071] The device system includes a biomass crushing device 1, a pre-washing device 3, a pre-dehydration device 4, a buffer bin 5, a continuous feeding device 6, a hydrothermal treatment device 8, a cooling and discharging device 9, and a solid-liquid separation device 10 that are connected in sequence.

[0072] A biomass conveying device 2 is arranged between the biomass crushing device 1 and the pre-washing device 3. The biomass conveying device is a conveyor belt. [[ID=,16]]

[0073] The device system further includes an anti-steam backflow device 7; the anti-steam backflow device 7 is respectively connected to the continuous feeding device 6 and the hydrothermal treatment device 8.

[0074] The anti-steam backflow device 7 includes a pressure sensor, a current detector, a quick isolation valve, and a pneumatic actuator. The pressure sensor is arranged at the inlet and outlet of the continuous feeding device 6; the current detector monitors the motor current of the continuous feeding device 6 and feeds it back to the control system of the complete set of devices in real time.

[0075] The biomass crushing device 1 is a knife roll cutting device.

[0076] The structural schematic diagram of the pre-washing device is as Figure 2 shown.

[0077] The pre-washing device 3 includes a pre-washing tank 31 and a guide wheel 32 arranged in the pre-washing tank 31.

[0078] The inner wall cross-section of the pre-washing tank 31 is arc-shaped.

[0079] The material guiding rotating wheel 32 includes a rotating shaft 321 and material guiding fan blades 322 fixedly connected to one end of the rotating shaft 321; the other ends of the material guiding fan blades 322 extend towards the inner wall of the pre-washing tank 31 but do not touch the inner wall.

[0080] A slag discharge port 311 is provided at the bottom of the pre-washing tank 31.

[0081] The pre-dehydration device 4 is a gravity dehydration device.

[0082] A quantitative feeding device is arranged between the buffer bin 5 and the continuous feeding device 6.

[0083] The continuous feeding device 6 is a spiral continuous feeding device.

[0084] The number of the hydrothermal treatment devices 8 is 2 groups, namely the first hydrothermal treatment device and the second hydrothermal treatment device.

[0085] The hydrothermal treatment device 8 is arranged obliquely; the inclination angle between the central axis of the hydrothermal treatment device 8 and the ground is 50°.

[0086] The cooling and discharging device 9 is connected to a cold water pipeline.

[0087] The solid-liquid separation device 10 is connected to a liquid return pipeline; the liquid return pipeline is respectively connected to the hydrothermal treatment device 8 and the pre-washing device 3.

[0088] A heat exchange component 11 is arranged on the liquid return pipeline.

[0089] The production method of the above device system for continuously preparing biomass fuel includes the following steps:

[0090] 500 kg of dry basis straw raw materials with a dry basis calorific value of 3800 kcal / kg are used; after being processed by the biomass crushing device 1, they enter the pre-washing device 3 through the biomass conveying device 2;

[0091] Assuming no mass loss, 2500 kg of straw raw materials with 80 wt% water content pass through the pre-dehydration device 4, and the water content is about 70%, the weight is 1666.7 kg, the temperature is 90 °C, and then enter the buffer bin 5;

[0092] The materials in the buffer bin 5 are quantitatively measured and continuously and stably conveyed to the continuous feeding device 6. At the plug position of the continuous feeding device 6, the water content of the straw materials is about 50 wt%, and the weight is 1000 kg. At this time, 30% - 50% of the inorganic salt ions are removed;

[0093] The steam backspray device 7 is monitored in real time, and then the material is fed into the hydrothermal treatment device 8; in the hydrothermal treatment device 8, the material is in full contact with high-temperature water and steam, rapidly heated up, and after 30 minutes of hydrothermal treatment at 190 °C, the material reaches the discharge port of the reaction vessel. The moisture content of the material is about 75%, the weight is 1600 kg, and the dry basis calorific value of the material is about 4350 kcal / kg;

[0094] The material enters the cooling and discharging device 9 and is discharged after being cooled by cooling water. The moisture content of the material is about 90%, and the total weight is 4000 kg;

[0095] After being separated by the solid-liquid separation device 10, the material has a moisture content of about 75% and a weight of 1600 kg; the liquid water separated by the solid-liquid separation is heated and raised in temperature by the heat exchange component 11, and a part of it enters the hydrothermal treatment device 8, and the other part enters the pre-washing device to achieve full utilization of heat.

[0096] In this specific embodiment, the material separated by the solid-liquid separation device 10 is further dried to a moisture content of 50% and a weight of 800 kg by mechanical dehydration, and further dried to produce biomass fuel. The removal rates of chloride ions and potassium ions in the finally prepared biomass fuel can both reach more than 70%, and the low-temperature calorific value of the biomass fuel on a dry basis is not less than 4300 kcal / kg.

[0097] In summary, the biomass fuel obtained by the device system for continuously preparing biomass fuel provided by the present invention has a high dry basis energy density, which is more than 1.1 times higher than that of the biomass raw material; moreover, the removal rates of chloride ions and potassium ions in the biomass fuel can both reach more than 70%, which is suitable for large-scale popularization and application.

[0098] The applicant declares that the present invention uses the above embodiments to illustrate the detailed structural features of the present invention, but the present invention is not limited to the above detailed structural features, that is, it does not mean that the present invention must rely on the above detailed structural features to be implemented. Those skilled in the art should understand that any improvement to the present invention, the equivalent replacement of the components selected by the present invention, the addition of auxiliary components, and the selection of specific methods, etc., all fall within the protection scope and the disclosure scope of the present invention.

[0099] The preferred embodiments of the present invention have been described in detail above. However, the present invention is not limited to the specific details in the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all belong to the protection scope of the present invention.

Claims

1. An apparatus system for continuously preparing biomass fuel, characterized in that, The device system includes a biomass crushing device (1), a pre-washing device (3), a pre-dehydration device (4), a buffer silo (5), a continuous feeding device (6), a hydrothermal treatment device (8), a cooling and discharging device (9), and a solid-liquid separation device (10) connected in sequence; A biomass conveying device (2) is arranged between the biomass crushing device (1) and the pre-washing device (3); The device system further includes an anti-steam backflow device (7); The anti-steam backflow device (7) is respectively connected to the continuous feeding device (6) and the hydrothermal treatment device (8); The anti-steam backflow device (7) includes a pressure sensor, a current detector, a quick isolation valve, and a pneumatic actuator; The pressure sensor is arranged at the inlet and outlet of the continuous feeding device (6); The current detector monitors the motor current of the continuous feeding device (6) and feeds it back to the control system of the complete set of devices in real time; The pre-washing device (3) includes a pre-washing tank (31) and a guide wheel (32) arranged in the pre-washing tank (31); The inner wall cross-section of the pre-washing tank (31) is arc-shaped; The guide wheel (32) includes a rotating shaft (321) and a guide blade (322) fixedly connected to one end of the rotating shaft (321); The other end of the guide blade (322) extends towards the inner wall of the pre-washing tank (31) but does not contact the inner wall; A slag discharge port (311) is arranged at the bottom of the pre-washing tank (31); The number of the hydrothermal treatment devices (8) is at least 1 group; The number of reaction vessels in each group of hydrothermal treatment devices (8) is at least 1; The inclination angle of the central axis of the hydrothermal treatment device (8) with the ground is ≤ 60°; The solid-liquid separation device (10) is connected to a liquid return pipeline; The liquid return pipeline is respectively connected to the hydrothermal treatment device (8) and the pre-washing device (3).

2. The device system according to claim 1, characterized in that, The biomass crushing device (1) includes a knife roll cutting device or a hydraulic extrusion crushing device.

3. The device system according to claim 1, wherein The pre-dehydration device (4) includes a gravity dehydration device or a mechanical extrusion dehydration device.

4. The device system according to claim 1, characterized in that A quantitative feeding device is arranged between the buffer silo (5) and the continuous feeding device (6); 5. The device system according to claim 1, characterized in that, The continuous feeding device (6) includes a screw continuous feeding device.

6. The device system according to claim 1, wherein The hydrothermal treatment device (8) is arranged obliquely; 7. The device system according to claim 1, characterized in that, The cooling and discharging device (9) is connected to a cold water pipeline; 8. The device system according to claim 1, characterized in that, A pump and / or a heat exchange component (11) is arranged on the liquid return pipeline.

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