Material stirring device for preparing biological crude oil

Abstract

The utility model belongs to the technical field of stirring devices, and particularly relates to a material stirring device for preparing biological crude oil and a stirring method of the material stirring device. The top of the storage tank is movably connected with a tank cover in a clamped mode, a first motor is arranged at the top of the tank cover, one side wall of the storage tank communicates with a circulating water pipeline, a collecting hopper is arranged at the bottom of the storage tank, and an electromagnetic valve is arranged between the collecting hopper and the screw feeder. The linkage assembly is driven by the first motor to stir biomass, the linkage assembly is communicated with the linkage assembly through the circulating water pipeline, circulating water is evenly distributed in the linkage assembly, the biomass is stirred more sufficiently in the stirring process, the stirred biomass is collected through the collecting hopper, and the stirring efficiency is improved. And after the electromagnetic valve is opened, the stirred biomass is transferred into the screw feeder for preheating treatment of the stirred biomass, so that the stirring quality after the biomass is mixed with circulating water is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of stirring devices, and particularly relates to a material stirring device for the preparation of bio-crude oil and a stirring method thereof. Background Technique

[0002] Biomass hydrothermal liquefaction is a technology that uses non-grain biomass such as microalgae, crop straws, tree branches and leaves, livestock and poultry manure, food waste, municipal solid waste, and energy plants as raw materials, uses water as a reaction solvent, and rapidly converts biomass into bio-crude oil at 150-450 degrees Celsius and 5-28 megapascals. The main equipment of the 100-kg biomass hydrothermal liquefaction oil production system includes a pretreatment system, a material conveying power system, a liquefaction reaction system, a three-phase separation system, a post-treatment system, as well as a control system and a safety guarantee system.

[0003] After retrieval, in the prior art, Chinese Patent Publication No. CN110368885B, Authorization Publication Date: June 8, 2021, discloses a device and method for continuously preparing bio-crude oil by biomass hydrothermal liquefaction. The device includes a double hydraulic cylinder feeding system, a material stirring tank, a preheating reactor, a hydrothermal liquefaction reactor, a product collection kettle, a back pressure valve, a filter, a gas-liquid-oil separator, a circulating water pipeline, and a control element. The feeding system of the device adopts a combination of a double hydraulic cylinder system and a high-pressure pump, which can improve the universality and pumping efficiency of raw materials, reduce the cost of the feeding system. The product separation effect of the method is good, the experimental safety is improved, the product can be efficiently and continuously separated, the additional use of organic reagents is not required, and the separation device has a simple structure and low cost, and can be widely used in the continuous separation of biomass hydrothermal liquefaction products.

[0004] However, this device still has the following defects: Although the crushed biomass can enter the material stirring tank through the feeding port during biomass pretreatment for biomass pretreatment, the biomass during the stirring process needs to be connected to the circulating water pipeline, and the circulating water pipeline cannot be fully mixed with the biomass during the stirring process, resulting in poor saturation between the biomass and the circulating water and affecting the stirring quality. Content of the Utility Model

[0005] In view of the above problems, the utility model provides a material stirring device for the preparation of bio-crude oil, which includes a storage tank, a screw feeder, and a linkage component;

[0006] The top of the storage tank is movably clamped with a tank cover, the top of the tank cover is provided with a first motor, one side wall of the storage tank is communicated with a circulating water pipeline, the bottom of the storage tank is provided with a collecting hopper, and an electromagnetic valve is arranged between the collecting hopper and the screw feeder. The linkage component is rotatably connected to the inner wall of the storage tank, and the top end of the linkage component is in transmission connection with the first motor;

[0007] Driven by the first motor, the linkage assembly stirs the biomass. During the stirring process, the circulating water pipeline is connected to the linkage assembly, so that the circulating water is evenly distributed in the linkage assembly, making the biomass more sufficient during the stirring process.

[0008] Further, the linkage assembly includes a flow splitting mechanism, a stirring rod mechanism and a closing mechanism; the stirring rod mechanism is embedded and installed at the central axis center of the flow splitting mechanism, the bottom end of the stirring rod mechanism is in transmission connection with the closing mechanism, the top end of the stirring rod mechanism is in transmission connection with the output end of the first motor, and a heating ring housing is rotatably connected to the top end of the flow splitting mechanism, and the heating ring housing is fixedly connected to the inner wall of the storage tank.

[0009] Further, the flow splitting mechanism includes an assembly plate; a flat bearing is rotatably connected to the top of the assembly plate, and the top surface of the flat bearing is fixedly connected to the bottom of the heating ring housing. A limiting ring is fixedly connected to the bottom of the assembly plate. A storage cavity is formed at the edge of the assembly plate, the flat bearing and the limiting ring, and the storage cavity is sleeved on the end of the circulating water pipeline.

[0010] Further, couplings are embedded and installed at the central axis centers of the assembly plate, the flat bearing and the limiting ring. A plurality of groups of assembly grooves are formed on the surfaces of the assembly plate, the flat bearing and the limiting ring, and the plurality of groups of assembly grooves are arranged in a circular array centered on the central axis of the flat bearing. A plurality of groups of overflow blocks are arranged between the outer wall of the coupling and the top of the assembly plate, and one ends of the plurality of groups of overflow blocks close to the flat bearing are inclined.

[0011] Further, the plurality of groups of overflow blocks are arranged in a circular array centered on the central axis of the coupling. Flow guide pipes are embedded and installed on the inner walls of the plurality of groups of assembly grooves. Two overflow holes are formed on the outer wall of the flow guide pipe, and the two overflow holes are symmetrically arranged centered on the central axis of the flow guide pipe, and the two overflow holes are arranged at the same horizontal level. A micro water pump is embedded and installed at one end of the flow guide pipe, and the micro water pump extends into the storage cavity.

[0012] Further, the stirring rod mechanism includes a stirring rod; a central axis groove is formed at the top of the stirring rod, and the central axis groove is clamped and fixed to the output end of the first motor. A first stirring blade is fixedly connected to the outer wall of the stirring rod.

[0013] Further, an electric push rod is fixedly connected to the bottom end of the stirring rod, and a second stirring blade is fixedly connected to the outer wall of the electric push rod. The stirring rod is connected to the coupling by a shaft, and the coupling is located between the first stirring blade and the second stirring blade.

[0014] Further, the closing mechanism includes a first overflow tray; a plurality of groups of first overflow grooves are formed on the surface of the first overflow tray, a second overflow tray is arranged at the bottom of the first overflow tray, and the second overflow tray has the same size as the first overflow tray, and a plurality of groups of second overflow grooves are formed on the surface of the second overflow tray.

[0015] Further, a plurality of groups of the second overflow grooves communicate with the first overflow grooves, a second motor is embedded at the central axis center of the second overflow tray, and the output end of the second motor is drivingly connected to the central axis center of the first overflow tray, and the output end of the electric push rod is drivingly connected to the central axis center of the top of the first overflow tray.

[0016] The beneficial effects of the present utility model are as follows:

[0017] 1. The first motor drives the linkage assembly to stir the biomass. The circulating water pipeline is communicated with the linkage assembly, so that the circulating water is evenly distributed in the linkage assembly, making the biomass more sufficient during the stirring process. The collecting hopper is used to collect the stirred biomass. After the solenoid valve is opened, the stirred biomass is transferred into the screw feeder for preheating treatment of the stirred biomass, improving the stirring quality after the mixing of the biomass and the circulating water.

[0018] 2. When the stirred biomass passes through the diversion mechanism, the diversion mechanism collects the circulating water in the circulating water pipeline and evenly diffuses it to different positions of the diversion mechanism, so that when the biomass passes through the diversion mechanism, it can be evenly wetted. When the preheated biomass on the surface contacts the circulating water, the adsorption efficiency of the biomass to the circulating water is increased, the saturation of the biomass is increased, and the mixing efficiency during the stirring process of the biomass is improved.

[0019] 3. The bottom output end of the stirring rod mechanism drives the closing mechanism to adjust the distance between the closing mechanism and the diversion mechanism, so as to adjust the stirring space after the biomass adsorbs the circulating water. Different stirring spaces form different stirring intensities, and the biomass is stirred to different degrees, improving the compatibility of stirring different amounts of biomass.

[0020] Other features and advantages of the present utility model will be described in the subsequent description, and, in part, will become apparent from the description or will be understood by implementing the present utility model. The objectives and other advantages of the present utility model can be achieved and obtained by the structures pointed out in the description, claims and drawings. Description of the Drawings

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 Shows the structural schematic diagram of the material stirring device in the embodiment of the present invention;

[0023] Figure 2 Shows the exploded view of the structure of the material stirring device in the embodiment of the present invention;

[0024] Figure 3 Shows the structural schematic diagram of the linkage assembly in the embodiment of the present invention;

[0025] Figure 4 Shows the structural schematic diagram of the flow splitting mechanism in the embodiment of the present invention;

[0026] Figure 5 Shows the structural schematic diagram of the diversion pipe in the embodiment of the present invention;

[0027] Figure 6 Shows the structural schematic diagram of the stirring rod mechanism in the embodiment of the present invention;

[0028] Figure 7 Shows the structural schematic diagram of the connected state of the closing mechanism in the embodiment of the present invention;

[0029] Figure 8 Shows the structural schematic diagram of the closed state of the closing mechanism in the embodiment of the present invention.

[0030] In the figure: 1, storage tank; 2, circulating water pipeline; 3, screw feeder; 4, tank cover; 5, first motor; 6, feed inlet; 7, hopper; 8, solenoid valve; 9, linkage assembly; 91, heating ring housing; 92, flow splitting mechanism; 921, mounting plate; 922, plain bearing; 923, limit ring; 924, coupling; 925, mounting groove; 926, overflow block; 927, diversion pipe; 928, overflow hole; 929, micro water pump; 93, stirring rod mechanism; 931, stirring rod; 932, axial center groove; 933, first stirring blade; 934, electric push rod; 935, second stirring blade; 94, closing mechanism; 941, first overflow tray; 942, first overflow groove; 943, second overflow tray; 944, second overflow groove; 945, second motor. Detailed implementation manners

[0031] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0032] The present utility model embodiment proposes a material stirring device for preparing bio-crude oil, comprising a storage tank 1, a screw feeder 3 and a linkage assembly 9; illustratively, as Figure 1 and Figure 2 shown.

[0033] The top of the storage tank 1 is movably connected with a tank cover 4, and a first motor 5 is arranged on the top of the tank cover 4, and the central axis of the first motor 5 coincides with the central axis of the tank cover 4. A feed port 6 is also provided on the surface of the tank cover 4 and on the side away from the first motor 5. A circulating water pipeline 2 is connected to one side wall of the storage tank 1, a collecting hopper 7 is arranged at the bottom of the storage tank 1, and a solenoid valve 8 is arranged between the collecting hopper 7 and the screw feeder 3. The linkage assembly 9 is rotatably connected to the inner wall of the storage tank 1, and the top of the linkage assembly 9 is transmission-connected to the first motor 5.

[0034] Specifically, the feed port 6 is used to receive the crushed biomass, and the first motor 5 is used to drive the linkage component 9, so that the linkage component 9 stirs the biomass. During the stirring process, the circulating water pipeline 2 is connected to the linkage component 9, so that the circulating water is evenly distributed in the linkage component 9, which is used to make the biomass more fully stirred during the stirring process, and the collecting hopper 7 is used to collect the stirred biomass. After the solenoid valve 8 is opened, the stirred biomass is transferred to the screw feeder 3 for preheating treatment of the stirred biomass.

[0035] The linkage assembly 9 includes a flow dividing mechanism 92, a stirring rod mechanism 93 and a closing mechanism 94; illustratively, as Figure 3 shown.

[0036] The stirring rod mechanism 93 is embedded and installed at the center of the central axis of the diversion mechanism 92, the bottom end of the stirring rod mechanism 93 is transmission connected to the closing mechanism 94, the top end of the stirring rod mechanism 93 is transmission connected to the output end of the first motor 5, the top end of the diversion mechanism 92 is rotatably connected to the heating ring shell 91, and the heating ring shell 91 is fixedly connected to the inner wall of the storage tank 1.

[0037] Furthermore, the inner wall of the heating ring shell 91 is provided with a plurality of groups of heating wires.

[0038] Specifically, the top end of the stirring rod mechanism 93 is drivingly connected to the output end of the first motor 5, so that the biomass enters the storage tank 1 and is stirred by the stirring rod mechanism 93, and the surface of the biomass is preheated during the stirring process by the heating ring shell 91;

[0039] When the stirred biomass passes through the diversion mechanism 92, the diversion mechanism 92 is used to collect the circulating water in the circulating water pipeline 2 and evenly diffuse it to different positions of the diversion mechanism 92, so that the biomass can be evenly wetted when passing through the diversion mechanism 92, and the biomass after the surface preheating treatment can contact with the circulating water, thereby increasing the adsorption efficiency of the biomass to the circulating water and increasing the saturation of the biomass;

[0040] The bottom output end of the stirring rod mechanism 93 is used to drive the closing mechanism 94, adjust the distance between the closing mechanism 94 and the diversion mechanism 92, and adjust the stirring space after the biomass adsorbs the circulating water, so that different stirring spaces form different stirring intensities and stir the biomass to different degrees.

[0041] The diversion mechanism 92 includes a mounting plate 921; illustratively, as Figure 4 and Figure 5 shown.

[0042] The top of the assembly plate 921 is rotatably connected to a plane bearing 922, and the top surface of the plane bearing 922 is fixedly connected to the bottom of the heating ring shell 91, and the bottom of the assembly plate 921 is fixedly connected to a limit ring 923, and a storage cavity is formed at the edges of the assembly plate 921, the plane bearing 922 and the limit ring 923, and the storage cavity is sleeved on the end of the circulating water pipeline 2, and a shaft coupling 924 is embedded and installed at the center of the central axis of the assembly plate 921, the plane bearing 922 and the limit ring 923. The surfaces of the assembly plate 921, the plane bearing 922 and the limit ring 923 are provided with a plurality of groups of assembly grooves 925, and the plurality of groups of the assembly grooves 925 are arranged in a circular array with the central axis of the plane bearing 922 as the center. A plurality of overflow blocks 926 are arranged between the outer wall of the coupling 924 and the top of the assembly plate 921, and a plurality of overflow blocks 926 are inclinedly arranged at one end close to the plane bearing 922, and a plurality of overflow blocks 926 are arranged in a circular array with the central axis of the coupling 924 as the center, and a plurality of assembly grooves 925 are embedded with a guide tube 927 on the inner wall, and two groups of overflow holes 928 are opened on the outer wall of the guide tube 927, and the two groups of overflow holes 928 are symmetrically arranged with the central axis of the guide tube 927 as the center, and the two groups of overflow holes 928 are arranged at the same level, and a micro water pump 929 is embedded with one end of the guide tube 927, and the micro water pump 929 extends into the storage cavity.

[0043] Specifically, the micro water pump 929 is used to adsorb the circulating water in the storage cavity and discharge the circulating water through the overflow holes 928 on both sides of the outer wall of the diversion pipe 927. After the discharge, the circulating water diffuses to both sides of the assembly groove 925 with the central axis of the diversion pipe 927 as the center, and is used to uniformly contact the biomass passing through the assembly groove 925.

[0044] The stirring rod mechanism 93 includes a stirring rod 931; Exemplarily, as Figure 6 shown.

[0045] An axial center groove 932 is formed at the top of the stirring rod 931, and the axial center groove 932 is clamped and fixed to the output end of the first motor 5. A first stirring blade 933 is fixedly connected to the outer wall of the stirring rod 931. An electric push rod 934 is fixedly connected to the bottom end of the stirring rod 931, and a second stirring blade 935 is fixedly connected to the outer wall of the electric push rod 934. The stirring rod 931 is connected to the shaft coupling 924 in an axial connection, and the shaft coupling 924 is located between the first stirring blade 933 and the second stirring blade 935.

[0046] The closing mechanism 94 includes a first overflow tray 941; Exemplarily, as Figure 7 and Figure 8 shown.

[0047] A number of groups of first overflow grooves 942 are formed on the surface of the first overflow tray 941. A second overflow tray 943 is provided at the bottom of the first overflow tray 941, and the second overflow tray 943 has the same size as the first overflow tray 941. A number of groups of second overflow grooves 944 are formed on the surface of the second overflow tray 943. The number of groups of the second overflow grooves 944 is in communication with the first overflow grooves 942. A second motor 945 is embedded and installed at the central axis center of the second overflow tray 943, and the output end of the second motor 945 is in transmission connection with the central axis center of the first overflow tray 941. The central axis center at the top of the first overflow tray 941 is in transmission connection with the output end of the electric push rod 934.

[0048] Specifically, the output end of the electric push rod 934 drives the first overflow tray 941 and the second overflow tray 943, so that the first overflow tray 941 and the second overflow tray 943 are slidably connected to different positions on the inner wall of the storage tank 1, and are used to adjust the stirring space of the second stirring blade 935, so that the second stirring blade 935 can stir the biomass to different degrees;

[0049] The rotation of the second motor 945 causes the first overflow groove 942 on the surface of the first overflow disk 941 and the second overflow groove 944 on the surface of the second overflow disk 943 to be interconnected or interlaced. The first overflow groove 942 and the second overflow disk 943 are interconnected, so that the stirred biomass is in a discharge state. The first overflow groove 942 and the second overflow disk 943 are interlaced, so that the biomass is in a continuously stirred state.

[0050] The material stirring device for preparing bio-crude oil proposed in the embodiment of the utility model has the following working principle:

[0051] The micro water pump 929 is used to absorb the circulating water in the storage chamber, and the circulating water is discharged through the overflow holes 928 on both sides of the outer wall of the guide tube 927. The discharged circulating water diffuses to both sides of the assembly groove 925 with the central axis of the guide tube 927 as the center, so as to evenly contact the biomass passing through the assembly groove 925;

[0052] The output end of the electric push rod 934 drives the first overflow disk 941 and the second overflow disk 943, so that the first overflow disk 941 and the second overflow disk 943 are slidably connected to different positions of the inner wall of the storage tank 1, so as to adjust the stirring space of the second stirring blade 935, so that the second stirring blade 935 can stir the biomass to different degrees;

[0053] By rotating the second motor 945, the first overflow groove 942 on the surface of the first overflow disk 941 and the second overflow groove 944 on the surface of the second overflow disk 943 are interconnected or interlaced. The first overflow groove 942 and the second overflow disk 943 are interconnected, so that the stirred biomass is in a state of unloading. The first overflow groove 942 and the second overflow disk 943 are interlaced, so that the biomass is in a state of continuous stirring.

[0054] The top end of the stirring rod mechanism 93 is connected to the output end of the first motor 5 by transmission, so that the biomass enters the storage tank 1 and is stirred by the stirring rod mechanism 93, and the surface of the biomass is preheated during the stirring process by the heating ring shell 91;

[0055] When the stirred biomass passes through the diversion mechanism 92, the diversion mechanism 92 is used to collect the circulating water in the circulating water pipeline 2 and evenly diffuse it to different positions of the diversion mechanism 92, so that the biomass can be evenly wetted when passing through the diversion mechanism 92, and the biomass after the surface preheating treatment can contact with the circulating water, thereby increasing the adsorption efficiency of the biomass to the circulating water and increasing the saturation of the biomass;

[0056] The bottom output end of the stirring rod mechanism 93 is used to drive the closing mechanism 94, adjust the distance between the closing mechanism 94 and the shunt mechanism 92, and adjust the stirring space after the biomass adsorbs the circulating water, so that different stirring spaces form different stirring intensities and stir the biomass to different degrees.

[0057] Based on the above-mentioned material stirring device for biocrude oil preparation, the embodiment of the present invention further provides a stirring method for the material stirring device for biocrude oil preparation, including the following steps:

[0058] Drive the linkage component through the first motor to stir the biomass;

[0059] Connect the circulating water pipeline to the linkage component to make the circulating water evenly distributed in the linkage component;

[0060] Use the aggregate hopper to collect the stirred biomass;

[0061] After the solenoid valve is opened, transfer the stirred biomass into the screw feeder.

[0062] Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A material stirring device for preparing bio-crude oil, characterized in that: It comprises a storage tank (1), a screw feeder (3) and a linkage assembly (9); The top of the storage tank (1) is movably connected with a tank cover (4), the top of the tank cover (4) is provided with a first motor (5), a side wall of the storage tank (1) is connected with a circulating water pipeline (2), a collecting hopper (7) is provided at the bottom of the storage tank (1), and a solenoid valve (8) is provided between the collecting hopper (7) and the screw feeder (3), the linkage component (9) is rotatably connected to the inner wall of the storage tank (1), and the top end of the linkage component (9) is drivingly connected to the first motor (5); The linkage component (9) is driven by the first motor (5) so that the linkage component (9) stirs the biomass. During the stirring process, the circulating water pipeline (2) is connected to the linkage component (9) so that the circulating water is evenly distributed in the linkage component (9), thereby making the biomass more fully stirred.

2. The material stirring device for preparing bio-crude oil according to claim 1, characterized in that: The linkage assembly (9) comprises a diverter mechanism (92), a stirring rod mechanism (93) and a closing mechanism (94); the stirring rod mechanism (93) is embedded and installed at the center of the central axis of the diverter mechanism (92); the bottom end of the stirring rod mechanism (93) is transmission-connected to the closing mechanism (94); the top end of the stirring rod mechanism (93) is transmission-connected to the output end of the first motor (5); the top end of the diverter mechanism (92) is rotationally connected to a heating ring shell (91), and the heating ring shell (91) is fixedly connected to the inner wall of the storage tank (1).

3. The material stirring device for preparing bio-crude oil according to claim 2, characterized in that: The diversion mechanism (92) comprises an assembly plate (921); a plane bearing (922) is rotatably connected to the top of the assembly plate (921), and the top surface of the plane bearing (922) is fixedly connected to the bottom of the heating ring shell (91); a limit ring (923) is fixedly connected to the bottom of the assembly plate (921); a receiving cavity is formed at the edges of the assembly plate (921), the plane bearing (922) and the limit ring (923), and the receiving cavity is sleeved on the end of the circulating water pipeline (2).

4. The material stirring device for preparing bio-crude oil according to claim 3, characterized in that: A shaft coupling (924) is embedded and installed at the center of the central axis of the assembly plate (921), the plane bearing (922) and the limiting ring (923); a plurality of assembly grooves (925) are provided on the surfaces of the assembly plate (921), the plane bearing (922) and the limiting ring (923); and the plurality of assembly grooves (925) are arranged in a circular array with the central axis of the plane bearing (922) as the center; a plurality of overflow blocks (926) are arranged between the outer wall of the shaft coupling (924) and the top of the assembly plate (921); and the plurality of overflow blocks (926) are arranged at an angle close to one end of the plane bearing (922).

5. The material stirring device for preparing bio-crude oil according to claim 4, characterized in that: A plurality of groups of overflow blocks (926) are arranged in a circular array with the central axis of the coupling (924) as the center, a plurality of groups of assembly grooves (925) are embedded with a guide tube (927) in the inner wall, and two groups of overflow holes (928) are opened on the outer wall of the guide tube (927), and the two groups of overflow holes (928) are symmetrically arranged with the central axis of the guide tube (927) as the center, and the two groups of overflow holes (928) are arranged at the same level, and a micro water pump (929) is embedded and installed at one end of the guide tube (927), and the micro water pump (929) extends into the storage cavity.

6. The material stirring device for preparing bio-crude oil according to claim 2, characterized in that: The stirring rod mechanism (93) comprises a stirring rod (931); an axial groove (932) is provided at the top of the stirring rod (931), and the axial groove (932) is snap-fitted and fixed to the output end of the first motor (5); and a first stirring blade (933) is fixedly connected to the outer wall of the stirring rod (931).

7. The material stirring device for preparing bio-crude oil according to claim 6, characterized in that: The bottom end of the stirring rod (931) is fixedly connected to an electric push rod (934), and the outer wall of the electric push rod (934) is fixedly connected to a second stirring plate (935). The stirring rod (931) is axially connected to a shaft coupling (924), and the shaft coupling (924) is located between the first stirring plate (933) and the second stirring plate (935).

8. The material stirring device for preparing bio-crude oil according to claim 2, characterized in that: The sealing mechanism (94) comprises a first overflow plate (941); a plurality of first overflow grooves (942) are provided on the surface of the first overflow plate (941); a second overflow plate (943) is provided at the bottom of the first overflow plate (941); the second overflow plate (943) has the same size as the first overflow plate (941); and a plurality of second overflow grooves (944) are provided on the surface of the second overflow plate (943).

9. The material stirring device for preparing bio-crude oil according to claim 8, characterized in that: A plurality of groups of the second overflow grooves (944) are interconnected with the first overflow grooves (942); a second motor (945) is embedded and installed at the center of the central axis of the second overflow disk (943); and the output end of the second motor (945) is transmission-connected to the center of the central axis of the first overflow disk (941); and the center of the top central axis of the first overflow disk (941) is transmission-connected to the output end of the electric push rod (934).

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