A filter for hydrothermal liquefaction high-temperature and high-pressure products

Abstract

The present invention relates to the technical field of biomass hydrothermal liquefaction, and discloses a filter for high-temperature and high-pressure products of hydrothermal liquefaction. A feed inlet is horizontally tangentially arranged on the upper side wall of the cylinder body, and primary filtration is achieved through the horizontal tangential action. A filter element is arranged inside the cylinder body, and the solid-phase products of hydrothermal liquefaction adhere to the filter element to achieve secondary filtration of the products, ensuring the filtering effect of the filter element. A rotating spray rod is assembled inside the cylinder body, and a number of tangential spray holes are opened on the rotating spray rod. The rotating spray rod is communicated with the flushing liquid inlet hole on the top cover. The rotating spray rod is driven to rotate by an electric drive mechanism, and the flushing liquid is sprayed onto the filter element. The cleaning mechanism rotates synchronously through the electric drive mechanism, and the inner and outer walls of the filter element are simultaneously cleaned by high-pressure water and the cleaning mechanism without disassembling the filter element, realizing effective cleaning of the filter element inside the cylinder body. The filtrate and the solid residues on the inner wall of the filter element are respectively discharged from the liquid outlet hole and the slag discharge hole through a cam drive mechanism to prevent material blockage.

Description

Technical Field

[0001] The invention relates to the technical field of biomass hydrothermal liquefaction, in particular to a filter for hydrothermal liquefaction high-temperature and high-pressure products. Background Art

[0002] Biomass hydrothermal liquefaction technology uses crop straw, forest waste and organic waste, domestic garbage, urban sludge, wastewater and other biomass as raw materials, and water as the reaction solvent. Under the reaction conditions of high temperature and high pressure of 200-370℃ and 5-20MPa, the biomass is converted into bio-crude oil through a series of thermochemical changes such as hydrolysis, degradation, decomposition, decarboxylation, deamination, dehydration, and polymerization. The hydrothermal liquefaction technology has the advantages that all components of the raw materials can participate in the reaction, the organic matter conversion efficiency is high, there is no drying process, energy loss is reduced, and material resources can be realized. This technology is conducive to alleviating the energy crisis of fossil energy shortage in my country, and is of great significance for improving the utilization rate of biomass energy (such as urban sludge). The hydrothermal liquefaction products include gas phase, oil phase, water phase and solid phase, which need to be separated before they can be used.

[0003] At present, the research on continuous hydrothermal liquefaction of biomass in China mainly focuses on the entire continuous reaction system, and there is no special introduction to the separation device of the solid and liquid phases of the hydrothermal liquefaction product. Most of the existing separation devices achieve solid-liquid separation through filters, but they are easily blocked by oil phase and solid phase, and the filter part needs to be repeatedly disassembled and cleaned; some use centrifugal or extraction separation methods, which require centrifuges, solvent evaporation and other equipment, and have high costs and energy consumption. Through mechanical and physical methods, efficient and stable separation of liquid and solid phases can be achieved, and at the same time, the backwash system can be used to prevent material blockage and improve the stability of continuous operation of the equipment, which is of great significance for the formation of large-scale production. Summary of the invention

[0004] In order to overcome the defects of the above-mentioned prior art, the purpose of the present invention is to provide a filter for hydrothermal liquefaction high-temperature and high-pressure products, so as to solve the technical problems in the prior art that the solid and liquid phases of the hydrothermal liquefaction products are easily clogged during separation, and the filter element needs to be disassembled and flushed when cleaning, which is time-consuming and labor-intensive.

[0005] The present invention is achieved through the following technical solutions:

[0006] A filter for high-temperature and high-pressure products of hydrothermal liquefaction, comprising a cylinder, a top cover, a motor transmission mechanism, a rotating spray rod, a cam transmission mechanism and a filter element; a feed port is horizontally tangentially arranged on the upper side wall of the cylinder, a sewage outlet is arranged on the lower side wall of the cylinder, a liquid outlet hole and a slag discharge hole are arranged at the bottom end of the cylinder, and a boss is arranged on the bottom side of the cylinder; the top cover is arranged on the top of the cylinder, the motor transmission mechanism is assembled on the top cover, a flushing liquid inlet hole is arranged on the top cover, a rotating spray rod is vertically arranged in the cylinder, one end of which is assembled on the motor transmission mechanism and communicated with the flushing liquid inlet hole, and the other end is rotatably assembled on the boss, the filter element is cylindrical in the cylinder, the rotating spray rod is in the filter element, a plurality of tangential spray holes are opened on the rotating spray rod, and the plurality of tangential spray holes are aligned with the direction of the filter element; cleaning mechanisms are arranged on both sides of the inner and outer walls of the filter element, and the cleaning mechanism is assembled on the motor transmission mechanism; a transmission mechanism is arranged on the boss, the cam transmission mechanism is transmission-connected to the transmission mechanism and contacts with the liquid outlet hole or the slag discharge hole, and the rotating spray rod is transmission-connected to the cam transmission mechanism through the transmission mechanism.

[0007] Preferably, the motor transmission mechanism includes a motor, a first gear and a second gear; the motor is mounted on the outside of the top cover, the first gear and the second gear are mounted on the inside of the top cover, the output shaft of the motor passes through the top cover and is connected to the second gear, the first gear is meshed with the second gear, and the ends of the rotating spray rod and the cleaning mechanism are both mounted on the first gear.

[0008] Furthermore, the cleaning mechanism includes two groups of vertical rods, one end of which is fixed on the first gear, the two groups of vertical rods are vertically arranged on both sides of the inner and outer walls of the filter element, and a number of brushes are arranged along the vertical direction of the filter element, and the number of brushes are in contact with the filter element.

[0009] Preferably, the transmission mechanism includes a first bevel gear, a second bevel gear and a transmission shaft, the first bevel gear is sleeved on the rotating spray rod, the transmission shaft passes through the boss arrangement, the second bevel gear is assembled on one side of the transmission shaft, and the second bevel gear is meshed with the first bevel gear, and the cam transmission mechanism is assembled on the other side of the transmission shaft.

[0010] Furthermore, the cam transmission mechanism includes a liquid outlet switch control mechanism and a slag discharge hole switch control mechanism, wherein the liquid outlet switch control mechanism is mounted on the transmission shaft corresponding to the liquid outlet setting, and the slag discharge hole switch control mechanism is mounted on the transmission shaft corresponding to the slag discharge hole setting.

[0011] Furthermore, the liquid outlet switch control mechanism includes a first cam, a first wooden board, a first fixing frame and a first spring; the first cam is sleeved on the transmission shaft, the first wooden board is covered at the liquid outlet on the inner side of the bottom end of the cylinder, the first fixing frame is welded to the liquid outlet on the outer side of the bottom end of the cylinder, one end of the first spring is fixed on the first fixing frame, and the other end passes through the liquid outlet and is fixed on the first wooden board, the first wooden board contacts with the first cam through the first spring, and the first spring is compressed by rotating the first cam to control the first wooden board to cover the liquid outlet, a liquid outlet is set at the liquid outlet on the outer side of the bottom end of the cylinder, and the cross-section of the liquid outlet is a trapezoidal structure with a small top and a large bottom.

[0012] Furthermore, the slag discharge hole switch control mechanism includes a second cam, a second wooden board, a second fixing frame and a second spring; the second cam is sleeved on the transmission shaft, the second wooden board is covered at the slag discharge hole on the inner side of the bottom end of the cylinder, the second fixing frame is welded to the slag discharge hole on the outer side of the bottom end of the cylinder, one end of the second spring is fixed on the second fixing frame, and the other end passes through the slag discharge hole and is fixed on the second wooden board, the second wooden board contacts with the second cam through the second spring, and the second spring is compressed by rotating the second cam to control the second wooden board to cover the slag discharge hole, a slag discharge port is set at the slag discharge hole on the outer side of the bottom end of the cylinder, and the cross-section of the slag discharge hole is a trapezoidal structure with a small top and a large bottom.

[0013] Preferably, a thrust bearing is installed in the boss, and the thrust bearing is fixed in the boss through a positioning block, the rotating spray rod is installed on the thrust bearing, and a sealing ring gasket is sleeved between the rotating spray rod and the thrust bearing.

[0014] Preferably, a flushing liquid inlet channel and a recessed groove are provided in the top cover, the flushing liquid inlet channel is connected to the flushing liquid inlet hole, and the rotating spray rod is assembled in the recessed groove and connected to the flushing liquid inlet channel.

[0015] Preferably, a pressure cover is also provided on the top of the top cover for pressing the top cover.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects:

[0017] The present invention provides a filter for high-temperature and high-pressure products of hydrothermal liquefaction, wherein a feed port is horizontally tangentially arranged on the upper side wall of a cylinder, and the solid phase of the hydrothermal liquefaction product is subjected to centrifugal movement through horizontal tangential action, thereby realizing primary filtration, and a filter element is arranged in the cylinder, and the solid phase product of hydrothermal liquefaction is attached to the filter element, thereby realizing secondary filtration of the product, thereby ensuring the filtering effect of the filter element, and a rotating spray rod is assembled in the cylinder, and a plurality of tangential spray holes are arranged on the rotating spray rod, and the rotating spray rod is connected with a flushing liquid inlet hole on a top cover, and the rotating spray rod is driven to rotate through an electric transmission mechanism, and the flushing liquid is sprayed onto the filter element, and the cleaning mechanism is synchronously rotated through the electric transmission mechanism, and the inner and outer walls of the filter element are cleaned simultaneously through high-pressure water and the cleaning mechanism, and the filter element does not need to be disassembled, thereby realizing effective cleaning of the filter element in the cylinder, and improving the practicality of the filter, and the cam transmission mechanism is arranged to discharge the filtrate and the solid residue on the inner wall of the filter element from the liquid outlet and the slag discharge hole respectively, thereby preventing material clogging, and making the filter element always maintain a good filtering effect, thereby improving the separation efficiency of the filter element and the stability of continuous operation of the equipment.

[0018] Furthermore, during the backwash process, the motor transmission mechanism effectively provides driving force for the device, facilitating the rotation of the spray rod, the cleaning mechanism and the cam transmission mechanism, thereby achieving efficient separation of the solid and liquid phases of the hydrothermal liquefaction product and cleaning of the filter residue on the filter element.

[0019] Furthermore, the cleaning mechanism includes two groups of vertical rods, one end of the two groups of vertical rods is assembled on the first gear, and a number of brushes are provided on the two groups of vertical rods along the vertical direction of the filter element. The several brushes are arranged in contact with the filter element to facilitate cleaning of the filter element and prevent material clogging, so that the filter element always maintains a good filtering effect.

[0020] Furthermore, the transmission mechanism can effectively drive the cam transmission mechanism through the rotation of the rotating spray rod, and can effectively control the opening or closing of the liquid outlet and the slag discharge hole.

[0021] Furthermore, the cam transmission mechanism includes a liquid outlet switch control mechanism and a slag discharge hole switch control mechanism, which improves the opening or closing control of the liquid outlet hole and the slag discharge hole, wherein a liquid outlet is arranged at the liquid outlet hole on the outer side of the bottom end of the cylinder, and a slag discharge outlet is arranged at the slag discharge hole on the outer side of the bottom end of the cylinder. The cross-sections of the liquid outlet hole and the slag discharge hole are both trapezoidal structures with small upper part and large lower part, so that the filtrate and residue do not adhere to the inner wall, thereby improving the filtration efficiency.

[0022] Furthermore, a thrust bearing is installed in the inner cavity of the boss, and the thrust bearing is fixed in the inner cavity of the boss through a positioning block, and the rotating spray rod is installed on the thrust bearing, thereby improving the rotation flexibility of the rotating spray rod.

[0023] Furthermore, a flushing liquid inlet channel and a recessed groove are provided in the top cover. The flushing liquid inlet channel is convenient for connecting to the flushing liquid inlet hole. The rotating spray rod is assembled in the recessed groove and connected to the flushing liquid inlet channel, thereby improving the stability of the rotating spray rod assembly. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the appearance structure of the filter of the hydrothermal liquefaction high temperature and high pressure product in the present invention;

[0025] Figure 2 It is a schematic diagram of the interior of the filter of the hydrothermal liquefaction high temperature and high pressure product in the present invention;

[0026] Figure 3 for Figure 2 The enlarged schematic diagram of part A in the middle;

[0027] Figure 4 It is a structural schematic diagram of the cam transmission mechanism in the present invention;

[0028] Figure 5 yes Figure 4 Displacement diagram of the follower of the cam designed in ;

[0029] Figure 6 This is the displacement diagram of the wooden board after adjusting the initial position of the transmission shaft.

[0030] In the figure: 1-cylinder; 2-top cover; 3-flushing liquid inlet hole; 4-first gear; 5-motor; 6-second gear; 7-flushing liquid inlet channel; 8-depression groove; 9-pressure cover; 10-filter element; 11-vertical rod; 12-brush; 13-rotating spray rod; 14-tangential spray hole; 15-first bevel gear; 16-thrust bearing; 17-second bevel gear; 18-positioning block; 19-transmission shaft; 20-liquid outlet; 21-liquid outlet; 22-slag discharge hole; 23-slag discharge port; 24-drainage outlet; 25-first cam; 26-first wooden board; 27-first fixing frame; 28-first spring; 29-second cam; 30-second wooden board; 31-second fixing frame; 32-second spring; 33-feeding port; 34-boss; 35-cam transmission mechanism; 36-bolt. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0032] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0033] The purpose of the present invention is to provide a filter for hydrothermal liquefaction high-temperature and high-pressure products to solve the technical problems in the prior art that the hydrothermal liquefaction products are easily clogged during separation of solid and liquid phases and need to be disassembled and flushed, which is time-consuming and labor-intensive.

[0034] according to Figure 1 and Figure 2 As shown, the filter for the high-temperature and high-pressure product of hydrothermal liquefaction comprises a cylinder 1, a top cover 2, a motor transmission mechanism, a rotating spray rod 13, a transmission mechanism, a cam transmission mechanism 35 and a filter element 10; a feed port 33 is horizontally tangentially arranged on the upper side wall of the cylinder 1, and preliminary centrifugation is performed through the inlet flow rate, which is beneficial to filtration, a sewage outlet 24 is arranged on the lower side wall of the cylinder 1, a boss 34 is arranged on the inner wall of the bottom end of the cylinder 1, wherein a liquid outlet 21 and a slag discharge hole 22 are arranged on one side of the boss 34, the top cover 2 is covered on the top of the cylinder 1 by bolts 36, the motor transmission mechanism is assembled on the top cover 2, and a flushing liquid inlet hole 3 is arranged on the top of the top cover 2, the rotating spray rod 13 is vertically arranged in the cylinder 1 along the center line of the cylinder 1, and one end of the rotating spray rod is assembled on the motor transmission mechanism, and The top cover 2 is penetrated to connect to the flushing liquid inlet hole 3, and the other end is assembled in the inner cavity of the rotatable boss 34. A plurality of tangential injection holes 14 are opened on the rotating spray rod 13, and the plurality of tangential injection holes 14 are aligned with the filter element. The transmission mechanism is arranged on the boss 34, and the transmission mechanism is connected to the rotating spray rod 13 in transmission. The cam transmission mechanism 35 is arranged on the transmission mechanism corresponding to the positions of the liquid outlet hole 21 and the slag discharge hole 22, and is used to open or close the liquid outlet hole 21 and the slag discharge hole 22; the filter element 10 is vertically sleeved on both sides of the rotating spray rod 13 in the cylinder 1, and the upper and lower ends of the filter element 10 are respectively fixed in the mounting grooves at the top cover 2 and the bottom end of the cylinder 1, and a cleaning mechanism is annularly sleeved on the filter element 10 for cleaning the filter residue on the filter element 10, and one end of the cleaning mechanism is assembled on the motor transmission mechanism.

[0035] Specifically, the motor transmission mechanism includes a motor 5, a first gear 4 and a second gear 6; the motor 5 is mounted on the outside of the top cover 2, the first gear 4 and the second gear 6 are mounted on the inside of the top cover 2, the output shaft of the motor 5 passes through the top cover 2 and is connected to the second gear 6, the first gear 4 is meshed with the second gear 6, and the ends of the rotating spray rod 13 and the cleaning mechanism are both mounted on the first gear 4.

[0036] Specifically, the cleaning mechanism includes two groups of vertical rods 11, one end of the two groups of vertical rods 11 is fixed on the first gear 4, the two groups of vertical rods 11 are vertically arranged on both sides of the inner and outer walls of the filter element 10, and a plurality of brushes 12 are arranged along the vertical direction of the filter element 10, and the plurality of brushes 12 are in contact with the filter element 10.

[0037] Specifically, the transmission mechanism includes a first bevel gear 15, a second bevel gear 17 and a transmission shaft 19, wherein the first bevel gear 15 is sleeved on the rotating spray rod 13, and the transmission shaft 19 is arranged through the boss 34, wherein the second bevel gear 17 is assembled on one side of the transmission shaft 19, and the second bevel gear 17 is meshed with the first bevel gear 15, and the cam transmission mechanism 35 is assembled on the other side of the transmission shaft 19.

[0038] Specifically, according to Figure 4 As shown, the cam transmission mechanism 35 includes a liquid outlet switch control mechanism and a slag discharge hole switch control mechanism. The liquid outlet switch control mechanism is assembled on the transmission shaft 19 corresponding to the liquid outlet 21, and the slag discharge hole switch control mechanism is assembled on the transmission shaft 19 corresponding to the slag discharge hole 22.

[0039] Among them, according to Figure 4 As shown, the liquid outlet switch control mechanism includes a first cam 25, a first wooden board 26, a first fixing frame 27 and a first spring 28; the first cam 25 is sleeved on the transmission shaft 19, the first wooden board 26 covers the liquid outlet 21 on the inner side of the bottom end of the cylinder 1, the first fixing frame 27 is welded to the liquid outlet 21 on the outer side of the bottom end of the cylinder 1, one end of the first spring 28 is fixed to the first fixing frame 27, and the other end passes through the liquid outlet 21 and is fixed to the first wooden board 26 to fix it, the first wooden board 26 contacts the first cam 25 through the first spring 28, and the first spring 28 is compressed by rotating the first cam 25, and the first wooden board 26 is controlled to cover the liquid outlet 21, and the liquid outlet 20 is set at the liquid outlet 21 on the outer side of the bottom end of the cylinder 1, and the cross-section of the liquid outlet 21 is a trapezoidal structure with a small top and a large bottom, as shown in FIG. Figure 3 shown.

[0040] Among them, according to Figure 4 As shown, the slag discharge hole switch control mechanism includes a second cam 29, a second wooden board 30, a second fixing frame 31 and a second spring 32; the second cam 29 is sleeved on the transmission shaft 19, the second wooden board 30 covers the slag discharge hole 22 on the inner side of the bottom end of the cylinder 1, the second fixing frame 31 is welded to the slag discharge hole 22 on the outer side of the bottom end of the cylinder 1, one end of the second spring 32 is fixed to the second fixing frame 31, and the other end passes through the slag discharge hole 22 and is fixed to the second wooden board 30 to contact the second cam 29 through the second spring 32, and the second cam 29 is rotated to compress the second spring 32, and the second wooden board 30 is controlled to cover the slag discharge hole 22, and a slag discharge port 23 is set at the slag discharge hole 22 on the outer side of the bottom end of the cylinder 1, and the cross-section of the slag discharge hole 22 is a trapezoidal structure with a small top and a large bottom, as shown in FIG. Figure 3 shown.

[0041] Specifically, a thrust bearing 16 is assembled in the inner cavity of the boss 34 , and the thrust bearing 16 is fixed in the inner cavity of the boss 34 through a positioning block 18 , the rotating spray rod 13 is assembled on the thrust bearing 16 , and a sealing ring gasket is sleeved between the rotating spray rod 13 and the thrust bearing 16 .

[0042] Specifically, a flushing liquid inlet channel 7 and a recessed groove 8 are provided in the top cover 2, wherein the flushing liquid inlet channel 7 is connected to the flushing liquid inlet hole 3, and the rotating spray rod 13 is assembled in the recessed groove 8 and connected to the flushing liquid inlet channel 7, wherein the inner wall of the recessed groove 8 is polished and smooth.

[0043] Specifically, a pressing cover 9 is further provided on the top of the top cover 2 for pressing the top cover 2 .

[0044] Example 1

[0045] The present embodiment provides a filter for high-temperature and high-pressure products of hydrothermal liquefaction, wherein the cylinder 1 is connected to the top cover 2 by threads, and a flushing liquid inlet hole 3 is provided at the upper opening of the top cover 2 for connecting high-pressure liquid, and a pressure cover 9 is threadedly connected to the top cover 2; the top cover 2 is provided with a flushing liquid inlet channel 7 connected to the inner cavity of a rotating spray rod 13, and a concave groove 8 is provided on the lower end surface of the top cover 2 to fit with the upper end of the rotating spray rod 13; the upper end of the rotating spray rod 13 is inserted into the concave groove 8, and the rotating spray rod 13 can rotate in the concave groove 8 under the action of external force, and a first gear 4 is mounted on the upper part of the outer circumference of the rotating spray rod 13, and the motor 5 is vertically installed on the left side of the top cover 2, The motor output shaft passes through the top cover 2 downward, and the second gear 6 fixed on the motor output shaft meshes with the first gear 4; the side wall of the rotating spray rod 13 is penetrated with a plurality of pairs of tangential spray holes 14 distributed at equal distances from top to bottom, and each pair of tangential spray holes 14 is symmetrical about the axis center of the rotating spray rod 13; two vertical rods 11 with brushes 12 bonded on both sides are vertically arranged on the left and right sides of the outer circumference of the rotating spray rod 13, and the vertical rods 11 are welded on the first gear 4; the middle of the vertical rod is a circular filter element 10; the upper end of the filter element 10 is inserted into the mounting groove of the lower end surface of the top cover, and the lower end is inserted into the mounting groove at the bottom of the cylinder 1. A first bevel gear 15 is sleeved on the rotating spray rod 13; a transmission shaft 19 is installed at the bottom of the cylinder 1; the transmission shaft can rotate with the second bevel gear 17 fixed on the transmission shaft. The second bevel gear 17 meshes with the first bevel gear 15; the other side of the transmission shaft 19 is connected to a cam transmission mechanism. The cam transmission mechanism includes a cam, a wooden board, a spring and a fixing frame; the first cam 25 is in contact with the first wooden board 26; the upper end of the first spring 28 is welded to the lower end surface of the first wooden board 26, passes through the liquid outlet hole 21, and the lower end is fixed to the first fixing frame 27 welded to the cylinder 1; the second cam 29 is in contact with the second wooden board 30; the upper end of the second spring 32 is welded to the lower end surface of the second wooden board 30, passes through the slag discharge hole 22, and the lower end is fixed to the second fixing frame 31 welded to the cylinder 1.

[0046] In this embodiment, the high-pressure liquid used for flushing can be a mixture of water and extraction liquid to flush the bio-crude oil in the solid residue and improve the flushing effect.

[0047] The filter of the hydrothermal liquefaction high temperature and high pressure product provided in the present invention is used:

[0048] During forward filtration, the slag discharge port 23 and the sewage discharge port 24 are closed, and the liquid outlet 20 is opened. The hydrothermal liquefaction product to be separated enters the inner cavity of the cylinder 1 tangentially through the feed port 33, flows through the filter element 10 for filtration after centrifugal vortex, and the filtered solid phase adheres to the inner and outer side walls of the filter element 10. The filtered liquid enters the interior of the filter element 10 and is discharged through the liquid outlet hole 21 and the liquid outlet 20 in sequence, thereby achieving the purpose of forward filtration.

[0049] During reverse flushing, the liquid outlet 20 is closed, and the slag outlet 23 and the sewage outlet 24 are opened. The motor 5 drives the second gear 6 to rotate, and the second gear 6 drives the first gear 4 to rotate, thereby driving the rotating spray rod 13 to rotate. As the rotating spray rod 13 rotates, on the one hand, the high-pressure liquid used for flushing enters the inner cavity of the rotating spray rod 13 through the flushing liquid inlet hole 3 and the flushing liquid inlet channel 7 in turn, and then is sprayed outward through each pair of tangential injection holes 14. On the other hand, the brush 12 contacts the filter element and can brush away the solids mixed in the holes of the filter element 10, thereby improving the cleaning effect. At the same time, the rotating spray rod 13 drives the first bevel gear 15 to rotate, and the first bevel gear 15 drives the second bevel gear 17 to rotate. The rotation of the second bevel gear 17 drives the first cam 25 and the second cam 29 installed on the transmission shaft 19 to rotate. The displacement line diagram is shown in FIG. Figure 5 As shown, the first wooden board 26 and the second wooden board 30 move vertically, and the displacement line diagram is shown in Figure 6 As shown (the liquid outlet hole 21 and the slag discharge hole 22 are in a completely closed state only when the displacement is 2), the liquid outlet hole 21 and the slag discharge hole 22 are in an alternately open state (the gear rotation time needs to be a cycle) to ensure the filtering effect.

[0050] In summary, the structural design of the present invention is reasonable and reliable, and the efficient separation of the solid phase and the liquid phase of the hydrothermal liquefaction product is achieved. By providing bolts and mounting grooves, the connecting bolts between the top cover and the cylinder are unscrewed, and then the filter element is pulled out for replacement and the brush is cleaned at the same time, thereby improving the practicality of the filter. Moreover, during backwashing, high-pressure water and brushes can simultaneously clean the inner and outer walls of the filter element, prevent material clogging, and enable the filter element to always maintain a good filtering effect, thereby improving the separation efficiency of the filter element and the stability of continuous operation of the equipment. By providing a cam mechanism, the filtrate and the solid residue on the inner wall of the filter element are discharged separately, thereby ensuring the filtering effect of the filter element. At the same time, the present invention can improve the filtering efficiency by making the cross-sections of the liquid outlet and the residue discharge hole a trapezoidal structure with a small top and a large bottom, so that the filtrate and the residue do not adhere to the inner wall. In addition, the high-pressure liquid used for flushing can be a mixture of water and an extracting liquid to flush the bio-crude oil in the solid residue and improve the flushing effect.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A filter for the high-temperature and high-pressure products of hydrothermal liquefaction, characterized in that, it includes a cylinder body (1), a top cover (2), a motor drive mechanism, a rotating spray rod (13), a cam drive mechanism (35) and a filter element (10); a feed port (33) is horizontally tangentially provided on the upper side wall of the cylinder body (1), a sewage discharge port (24) is provided on the lower side wall of the cylinder body (1), a liquid outlet hole (21) and a slag discharge hole (22) are provided at the bottom end of the cylinder body (1), and a convex platform (34) is provided on the inner bottom side of the cylinder body (1); the top cover (2) is arranged on the top of the cylinder body (1), the motor drive mechanism is assembled on the top cover (2), a flushing liquid inlet hole (3) is provided on the top cover (2), the rotating spray rod (13) is vertically arranged in the cylinder body (1), one end of which is assembled on the motor drive mechanism and communicated with the flushing liquid inlet hole (3), and the other end is rotatably assembled on the convex platform (34), the filter element (10) is in a cylindrical shape in the cylinder body (1), the rotating spray rod (13) is inside the filter element (10), and a plurality of tangential spray holes (14) are provided on the rotating spray rod (13), and the plurality of tangential spray holes (14) are aligned in the direction of the filter element (10); cleaning mechanisms are provided on both sides of the inner and outer walls of the filter element (10), and the cleaning mechanisms are assembled on the motor drive mechanism; a drive mechanism is provided on the convex platform (34), the cam drive mechanism (35) is drivingly connected to the drive mechanism and contacts the liquid outlet hole (21) or the slag discharge hole (22), and the rotating spray rod (13) is drivingly connected to the cam drive mechanism (35) through the drive mechanism.

2. The filter for the high-temperature and high-pressure products of hydrothermal liquefaction according to claim 1, characterized in that, the motor drive mechanism includes a motor (5), a first gear (4) and a second gear (6); the motor (5) is assembled on the outside of the top cover (2), the first gear (4) and the second gear (6) are assembled on the inside of the top cover (2), the output shaft of the motor (5) passes through the top cover (2) and is connected to the second gear (6), the first gear (4) meshes with the second gear (6), and the ends of the rotating spray rod (13) and the cleaning mechanism are both assembled on the first gear (4).

3. The filter for the high-temperature and high-pressure products of hydrothermal liquefaction according to claim 2, characterized in that, the cleaning mechanism includes two groups of vertical rods (11), one ends of the two groups of vertical rods (11) are fixed on the first gear (4), the two groups of vertical rods (11) are vertically arranged on both sides of the inner and outer walls of the filter element (10), and a plurality of brushes (12) are provided along the vertical direction of the filter element (10), and the plurality of brushes (12) contact the filter element (10).

4. The filter for the high-temperature and high-pressure products of hydrothermal liquefaction according to claim 1, characterized in that, The transmission mechanism includes a first bevel gear (15), a second bevel gear (17) and a transmission shaft (19). The first bevel gear (15) is sleeved on the rotating spray bar (13). The transmission shaft (19) is arranged through the boss (34). A second bevel gear (17) is assembled on one side of the transmission shaft (19), and the second bevel gear (17) meshes with the first bevel gear (15). The cam transmission mechanism (35) is assembled on the other side of the transmission shaft (19).

5. A filter for hydrothermal liquefaction high-temperature and high-pressure products according to claim 4, characterized in that, the cam transmission mechanism (35) includes a liquid outlet hole switch control mechanism and a slag discharge hole switch control mechanism. The liquid outlet hole switch control mechanism is assembled on the transmission shaft (19) corresponding to the liquid outlet hole (21). The slag discharge hole switch control mechanism is assembled on the transmission shaft (19) corresponding to the slag discharge hole (22).

6. A filter for hydrothermal liquefaction high-temperature and high-pressure products according to claim 5, characterized in that, the liquid outlet hole switch control mechanism includes a first cam (25), a first wooden board (26), a first fixing bracket (27) and a first spring (28). The first cam (25) is sleeved on the transmission shaft (19). The first wooden board (26) covers the liquid outlet hole (21) at the inner bottom end of the cylinder body (1). The first fixing bracket (27) is welded at the liquid outlet hole (21) on the outer bottom end of the cylinder body (1). One end of the first spring (28) is fixed on the first fixing bracket (27), and the other end passes through the liquid outlet hole (21) and is fixed on the first wooden board (26). The first wooden board (26) contacts the first cam (25) through the first spring (28), and controls the first wooden board (26) to cover the liquid outlet hole (21) by rotating the first cam (25) to compress the first spring (28). A liquid outlet (20) is arranged at the liquid outlet hole (21) on the outer bottom end of the cylinder body (1). The cross section of the liquid outlet hole (21) is a trapezoidal structure with a smaller upper part and a larger lower part.

7. A filter for hydrothermal liquefaction high-temperature and high-pressure products according to claim 5, characterized in that, the slag discharge hole switch control mechanism includes a second cam (29), a second wooden board (30), a second fixing bracket (31) and a second spring (32). The second cam (29) is sleeved on the transmission shaft (19). The second wooden board (30) covers the slag discharge hole (22) at the inner bottom end of the cylinder body (1). The second fixing bracket (31) is welded at the slag discharge hole (22) on the outer bottom end of the cylinder body (1). One end of the second spring (32) is fixed on the second fixing bracket (31), and the other end passes through the slag discharge hole (22) and is fixed on the second wooden board (30). The second wooden board (30) contacts the second cam (29) through the second spring (32), and controls the second wooden board (30) to cover the slag discharge hole (22) by rotating the second cam (29) to compress the second spring (32). A slag discharge port (23) is arranged at the slag discharge hole (22) on the outer bottom end of the cylinder body (1). The cross section of the slag discharge hole (22) is a trapezoidal structure with a smaller upper part and a larger lower part.

8. A filter for hydrothermal liquefaction high-temperature and high-pressure products according to claim 1, characterized in that, a thrust bearing (16) is assembled in the boss (34), and the thrust bearing (16) is fixed in the boss (34) through a positioning block (18). The rotating spray rod (13) is assembled on the thrust bearing (16), and a sealing ring gasket is sleeved between the rotating spray rod (13) and the thrust bearing (16).

9. A filter for hydrothermal liquefaction high-temperature and high-pressure products according to claim 1, characterized in that, a flushing liquid inlet channel (7) and a recessed groove (8) are provided in the top cover (2). The flushing liquid inlet channel (7) communicates with the flushing liquid inlet hole (3), and the rotating spray rod (13) is assembled and communicated with the recessed groove (8) and the flushing liquid inlet channel (7).

10. A filter for hydrothermal liquefaction high-temperature and high-pressure products according to claim 1, characterized in that, a gland (9) is further provided on the top of the top cover (2) for pressing the top cover (2).

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