A method and apparatus for waste treatment in a hydrothermal liquefaction process

Abstract

The application discloses a waste treatment method and treatment equipment in a hydrothermal liquefaction process, and relates to the technical field of filtration treatment. The waste treatment equipment in the hydrothermal liquefaction process uses a hollow semicylindrical container as a carrier of an annular filter belt, uses a filter belt shaping assembly to shape part of the annular filter belt into a slide shape, uses multiple rollers to guide the annular filter belt into cleaning liquid, and continuously cleans and dredges the annular filter belt in the rotating process. The carrier container is controlled to reciprocate when the annular filter belt rotates. The technical effect of high utilization rate of filter holes of a self-filtering component of the waste treatment equipment in the hydrothermal liquefaction process, no manual cleaning of the filtering component, automatic continuous dredging and cleaning of the filtering component, no frequent replacement of the filtering component, and good stability of the separation effect of the solid-liquid mixture is achieved.

Description

Technical Field

[0001] This invention relates to the field of filtration technology, and more particularly to a method and equipment for treating waste during hydrothermal liquefaction. Background Technology

[0002] In the process of treating waste (such as kitchen waste) through hydrothermal liquefaction, a large amount of organic-rich byproducts (a mixture of solid and liquid materials) are generated. These byproducts still have utilization value and generally need to be filtered and separated by filtration and separation equipment before utilization (for water fertilization and anaerobic fermentation, etc.).

[0003] In existing technologies, the core structure of equipment for filtering and separating by-products of hydrothermal liquefaction is generally a fixed filter screen and / or a fixed filter layer. The mixed material undergoes solid-liquid separation after passing through the filter screen and / or filter layer. Due to its structure limitations, the utilization rate of the filter pores on the filtration and separation equipment is low (the filter pores are not fully utilized), and they are prone to clogging, resulting in poor operational stability and low operational efficiency. In addition, due to its structure limitations, once clogged, it is difficult to unclog and clean, requiring manual cleaning or direct replacement. The cleaning and replacement process is cumbersome and complicated, which is not conducive to the automated processing of by-products (mixed materials) after hydrothermal liquefaction.

[0004] Therefore, there is a need for a waste treatment device in the hydrothermal liquefaction process that has high utilization of the filter pores of its own filter components, requires no manual cleaning of the filter components, can automatically and continuously unclog and clean the filter components, does not require frequent replacement of the filter components, and has good stability in the separation effect of solid-liquid mixtures. Summary of the Invention

[0005] This application provides a waste treatment device for hydrothermal liquefaction processes, which solves the technical problems of low pore utilization rate of filter components, the need for manual cleaning and frequent replacement of filter components, and poor stability of filtration and separation in existing waste treatment devices for hydrothermal liquefaction processes. It achieves the technical effects of high pore utilization rate of filter components in the waste treatment device for hydrothermal liquefaction processes, no need for manual cleaning of filter components, automatic and continuous unblocking and cleaning of filter components, no need for frequent replacement of filter components, and good stability of the separation effect for solid-liquid mixtures.

[0006] This application provides a waste treatment device for hydrothermal liquefaction process, including a carrying container, a filter belt assembly, a filter belt shaping assembly, a material injection assembly, and an immersion cleaning assembly; The container is a horizontally placed hollow semi-cylindrical shape with an open top, which serves to contain and support the contents. The component that contains the contents is controlled to swing around its own length. The internal space is divided into a liquid storage chamber and a cleaning chamber. The filter belt assembly includes a first end roller, a second end roller, and an annular filter belt; the first end roller and the second end roller are respectively positioned on the inner wall of the carrying container near both ends; the annular filter belt is an annular strip-shaped filter screen, sleeved on the first end roller and the second end roller; The filter belt shaping assembly is used to shape a portion of the annular filter belt located above the liquid storage tank by contacting the annular filter belt, shaping the portion of the annular filter belt into a slide shape so as to receive and transport material from the material injection assembly; The material injection component is used to inject the material to be separated into the top of the annular filter belt, and its main body is tubular. The immersion cleaning assembly uses rollers to guide the lower annular filter belt located within the cleaning chamber into the liquid inside the cleaning chamber.

[0007] Furthermore, the supporting container includes an arc-shaped base plate, an end cap plate, and a partition plate; The arc-shaped base plate is a horizontally placed arc-shaped strip plate; The end sealing plates are upright rigid plates, two in number, and are fixed to both ends of the arc-shaped base plate respectively; The curved base plate and the two end caps together form a semi-cylindrical space; The partition plate is a vertical rigid plate fixed to the concave surface of the arc-shaped base plate, dividing the space enclosed by the arc-shaped base plate and the two end sealing plates into two parts: a liquid storage chamber for containing the filtered liquid products and a cleaning chamber for cleaning the filter belt assembly.

[0008] Furthermore, the filter belt shaping assembly includes a first shaping rod, a second shaping rod, and a load-bearing bracket that serves as a connecting support; The first and second shaping rods are both arc-shaped bent rods, set at the same height, and fixed to the inner wall of the arc-shaped base plate by the bearing bracket. The openings face upwards, and both are located in the space enclosed by the annular filter belt. Both have one or more rows of top contact wheels on their concave surfaces near the top to reduce the moving friction of the annular filter belt. The top contact wheel is a cylindrical wheel body; The first shaping rod and the second shaping rod have different bending radii, with the latter having a larger bending radius; The number of the first shaping rod is one; There are two second shaping rods, located on either side of the first shaping rod; The inner ring of the annular filter belt is in close contact with the top contact wheel. The part of the annular filter belt near the top of the filter belt shaping assembly is gradually guided into a slide with an arc cross-section by the first shaping rod and the second shaping rod during the movement.

[0009] Furthermore, the immersion cleaning assembly includes a guide roller; The guide rollers are cylindrical rollers, and there are multiple rollers, with at least three rollers. Their axial direction is perpendicular to the length direction of the arc-shaped base plate, and they are rotatably connected to the concave surface of the arc-shaped base plate around their own axis. Multiple guide rollers guide the annular filter belt to be immersed in the cleaning solution for washing.

[0010] Preferably, it also includes an extrusion drying component; The extrusion drying assembly is located directly above the liquid storage tank and away from the cleaning tank; The extrusion drying assembly includes at least two bottom rollers and also includes a top pressure assembly; The bottom roller is located in the space enclosed by the annular filter belt, away from the cleaning chamber and the filter belt shaping assembly, and always abuts against the inner ring of the annular filter belt; The top pressure assembly is positioned directly above the bottom roller body; The top pressure assembly includes a support frame, a vertical telescopic rod, a connecting frame, a first working roller, a second working roller, and an annular pressure belt; The support frame is fixed to the arc-shaped base plate; The vertical telescopic rod and the vertical rigid telescopic rod are fixed on the support frame, and their axial direction is perpendicular to the length direction of the arc-shaped base plate. The connecting frame is a rigid frame that is fixed to the bottom of the vertical telescopic rod; The first and second working rollers are both horizontally placed rigid rollers located above the bottom roller body, and are rotatably connected to the connecting frame around their own axis; The annular pressure belt is an annular strip filter screen, which is fitted onto the first working roller and the second working roller and supported by the two rollers into an elongated oval shape.

[0011] Preferably, the connecting frame is rotatably connected to the bottom of the vertical telescopic rod, and the axial direction of the rotating shaft is the same as the axial direction of the bottom roller body, and it rotates under the drive of the rotating drive assembly; The rotation drive assembly is a controlled telescopic rod structure; During use, the rotation of the connecting frame is controlled as needed to adjust the posture of the annular pressure belt and thus obtain different extrusion and separation effects.

[0012] Preferably, the bottom roller body is a roller that is thinner in the middle and thicker at both ends; Both the first working roller and the second working roller are rollers that are thicker in the middle and thinner at both ends; The annular pressure belt fitted on the first and second working rollers is also bulged in the middle by the two rollers; The extrusion drying assembly also includes a water-absorbing column; The water-absorbing column is fixed to the connecting frame by a rigid support tube frame; The water-absorbing column is a horizontal column located in the space enclosed by the annular pressure belt, with its bottom positioned near the center of the inner ring of the annular pressure belt. The water-absorbing column is hollow inside and has multiple through holes at the bottom for water absorption; The suction column is connected to the water pump and is used to draw in the squeezed water and discharge it.

[0013] Preferably, the annular pressure belt is eliminated, and a belt torsion assembly is added, using an annular filter belt 230 to replace the annular pressure belt; The belt torsion assembly is positioned directly above the arc-shaped base plate and includes a horizontal guide roller group, a vertical guide roller group, a guide roller group, and a roller carrier frame. The horizontal guide roller group consists of multiple horizontally placed rigid rollers positioned directly above the cleaning chamber to guide the movement of the annular filter belt; the vertical guide roller group consists of multiple vertically placed rigid rollers positioned directly above the filter belt shaping assembly to guide the movement of the annular filter belt; the guide roller group consists of multiple horizontally placed rigid rollers positioned directly above the extrusion drying assembly to guide the movement of the annular filter belt. The overall torsion of the annular filter belt is determined by the horizontal guide roller group, the vertical guide roller group, and the guide roller group. The roller support frame is a vertical rigid frame fixed on an arc-shaped base plate. There are multiple such frames, which serve to support and bear the multiple rollers of the belt torsion assembly. Guided by the first end roller, the second end roller, the horizontal guide roller group, the vertical guide roller group, the guide roller group, the first working roller and the second working roller, the annular filter belt is U-shaped with the opening facing one side.

[0014] Preferably, an air jet cleaning assembly is positioned on the roller carrier body near the vertical guide roller assembly; The jet cleaning component is a vertical rigid hollow column, which is connected to the air pump and is located in the space enclosed by the annular filter belt. When the jet is sprayed, it can clear the annular filter belt. Because the annular filter belt is twisted, the filter holes of the annular filter belt will also deform with the twisting, making it easier to unclog and clean.

[0015] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: This invention provides a waste treatment device for hydrothermal liquefaction processes that uses an annular filter belt to separate solid and liquid products. The device utilizes a hollow semi-cylindrical container with an open top as the carrier of the annular filter belt. A filter belt shaping component shapes part of the annular filter belt into a slide-like shape. Multiple rollers guide the annular filter belt into a cleaning solution, continuously cleaning and unblocking it during rotation. By controlling the reciprocating oscillation of the carrier container while the annular filter belt rotates, the utilization rate of the filter pores on the annular filter belt is improved, while the material to be filtered moves back and forth along the width of the annular filter belt. This effectively solves the technical problems of low filter pore utilization rate, the need for manual cleaning and frequent replacement of filter components, and poor filtration stability in existing waste treatment devices for hydrothermal liquefaction processes. Furthermore, it achieves high filter pore utilization rate of the waste treatment device's own filter components during hydrothermal liquefaction, eliminates the need for manual cleaning of filter components, enables automatic and continuous unblocking and cleaning of filter components, reduces the need for frequent replacement of filter components, and provides good stability in the separation of solid-liquid mixtures. Attached Figure Description

[0016] Figure 1 This is a schematic diagram showing the positional relationship of the various components of the waste treatment equipment during the hydrothermal liquefaction process in this application; Figure 2 This is a schematic diagram of the external structure of the waste treatment equipment during the hydrothermal liquefaction process of this application. Figure 3 This is a schematic diagram showing the positional relationship between the support container and the filter belt shaping assembly; Figure 4 This is a schematic diagram of the structure of an annular filter belt; Figure 5 This is a schematic diagram showing the connection relationship between the liquid storage tank, the cleaning tank, and the liquid pump; Figure 6 This is a schematic diagram showing the positional relationship between the extrusion drying assembly and the filter belt assembly; Figure 7 This is a schematic diagram of the extrusion drying assembly; Figure 8 This is a schematic diagram showing the positional relationship between the suction pipe and the annular pressure belt. Figure 9 A schematic diagram showing the positional relationship between the water suction pipe and the connecting frame; Figure 10 This is a schematic diagram showing the positional relationship between the belt torsion assembly, the supporting container, and the filter belt assembly. Figure 11 This is a schematic diagram showing the positional relationship between the belt torsion assembly and the annular filter belt. Figure 12 This is a schematic diagram showing the state of the annular filter belt after it has been twisted.

[0017] In the picture: Components include: a support container 100, an arc-shaped base plate 110, an end sealing plate 120, a working scraper 121, a partition plate 130, a liquid storage tank 131, a cleaning tank 132, a ground rail 140, an adapter strip 150, a limiting elastic body 160, a pulling hoist assembly 170, a filter belt assembly 200, a first end roller 210, a second end roller 220, an annular filter belt 230, a first shaping rod 310, a top contact wheel 311, a second shaping rod 320, and a support bracket 3. 30. Injection pipe 410, positioning frame 420, guide roller 510, bottom roller body 610, support frame body 620, vertical telescopic rod 630, connecting carrier 640, rotation drive assembly 650, first working roller 660, second working roller 670, annular pressure belt 680, water suction column 690, pipe frame 691, horizontal guide roller group 710, vertical guide roller group 720, guide roller group 730, roller carrier frame body 740, air jet cleaning assembly 750. Detailed Implementation

[0018] To facilitate understanding of the present invention, a more complete description of this application will be given below with reference to the accompanying drawings, which illustrate preferred embodiments of the invention. However, the invention can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of the present invention.

[0019] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] Example 1

[0022] like Figures 1 to 5 As shown, the waste treatment equipment in the hydrothermal liquefaction process of this application includes a carrying container 100, a filter belt assembly 200, a filter belt shaping assembly, a material injection assembly, an immersion cleaning assembly, a power assembly, and a control unit.

[0023] The carrying container 100 is a horizontally placed hollow semi-cylindrical shape with an open top, serving to contain and support the contents. The carrier container 100 includes an arc-shaped base plate 110, end sealing plates 120, and a partition plate 130. The arc-shaped base plate 110 is a horizontally placed arc-shaped strip plate. The two end sealing plates 120 are vertically placed rigid plates, respectively fixed at both ends of the arc-shaped base plate 110. The arc-shaped base plate 110 and the two end sealing plates 120 together form a semi-cylindrical space. The partition plate 130 is a vertically placed rigid plate, fixed on the concave surface of the arc-shaped base plate 110, dividing the space enclosed by the arc-shaped base plate 110 and the two end sealing plates 120 into two parts: a liquid storage chamber 131 for containing the filtered liquid product and a cleaning chamber 132 for cleaning the filter belt assembly 200.

[0024] The carrying container 100 also includes a container rotating assembly for driving the combination of the arc-shaped base plate 110 and the end sealing plate 120 to swing as needed. The axial direction of the rotation axis of the combination of the arc-shaped base plate 110 and the end sealing plate 120 is the same as the length direction of the arc-shaped base plate 110. The container rotating assembly is a combination of an inclined and controlled retractable hydraulic cylinder, a winch structure and an elastic rope, and a combination of a semi-gear ring that is close to the outer wall of the arc-shaped base plate 110 and a gear driven by a motor.

[0025] Furthermore, such as Figure 1 and Figure 2As shown, the container rotation assembly includes a ground-mounted rail 140, an adapter strip 150, a limiting elastic body 160, and a pulling winch assembly 170. The ground-mounted rail 140 is a horizontally placed rigid plate, multiple of which are parallel to each other and fixed to the ground. Its top has a long, narrow groove running parallel to its length. The ground-mounted rail 140 supports the curved base plate 110, and its length is perpendicular to the length of the curved base plate 110. The adapter strip 150 is a curved, rigid strip fixed to the bottom (convex) surface of the curved base plate 110, corresponding one-to-one with the ground-mounted rail 140 and matching its groove, preventing misalignment when the curved base plate 110 swings. The limiting elastic body 160 is an elastic rope or metal spring, rope-shaped, with one end fixed to the curved base plate. One side of the curved base plate 110, near the top, is positioned with one end on the ground. It is tilted and always taut, with its length perpendicular to the length of the curved base plate 110. When the curved base plate 110 swings, the limiting elastic body 160 accumulates and releases elastic potential energy, assisting in the return of the curved base plate 110 to its original position after swinging. The pulling winch assembly 170 is a combination of a winch and a winch rope. One end of the winch rope is fixed to the other side of the curved base plate 110 near the top, and the other end is wound and positioned on the winch, forming an oblique angle with the limiting elastic body 160. The winch is positioned on the ground and close to the curved base plate 110. When the pulling winch assembly 170 is running (when retracting or extending the winch rope), the curved base plate 110 swings under controlled tension.

[0026] like Figure 3 and Figure 4 As shown, the main body of the filter belt assembly 200 is a conveyor belt structure with an annular belt as the filter belt, which includes a first end roller 210, a second end roller 220, and an annular filter belt 230. The first end roller 210 and the second end roller 220 have the same structure and are respectively positioned on the inner wall of the carrying container 100 near both ends, with their axial direction perpendicular to the length direction of the arc-shaped base plate 110. At least one of them rotates under the coordinated control of the power component and the control unit, thereby driving the annular filter belt 230 to rotate. The annular filter belt 230 is an annular strip filter screen, sleeved on the first end roller 210 and the second end roller 220, and is always in a taut state, supported by the first end roller 210 and the second end roller 220 into a horizontally placed elongated oval shape. The annular filter belt 230 is densely covered with filter holes (the annular filter belt 230 has different specifications, and the filter hole size is different for different specifications, and it is replaced as needed).

[0027] A working scraper 121 is fixed on the end sealing plate 120 away from the cleaning chamber 132; the working scraper 121 is a horizontal hard scraper that abuts against the outer ring of the annular filter belt 230 and together with the second end roller 220 clamps the annular filter belt 230 in the middle; during the movement (rotation) of the annular filter belt 230, the working scraper 121 scrapes off the solid material separated on it.

[0028] like Figure 3 As shown, the filter belt shaping assembly is used to shape (shape into a concave arc-shaped sheet) a portion of the annular filter belt 230 located above the liquid storage tank 131 by abutting against the annular filter belt 230, so that the annular filter belt 230 can receive and transport the material from the material injection assembly. The filter belt shaping assembly includes a first shaping rod 310, a second shaping rod 320, and a support bracket 330 that provides connection and support. Both the first shaping rod 310 and the second shaping rod 320 are arc-shaped bent rods, set at the same height, and fixed to the inner wall of the arc-shaped base plate 110 by the support bracket 330, with their openings facing upwards. Both are located within the space enclosed by the annular filter belt 230. One or more rows of top contact wheels 311 are provided on the concave surface near the top of both rods to reduce the moving friction of the annular filter belt 230. The top contact wheels 311 are cylindrical wheels. The bending radii of the first shaping rod 310 and the second shaping rod 320 are... The latter has a larger bending radius; there is one first shaping rod 310; there are two second shaping rods 320, located on both sides of the first shaping rod 310; the inner ring of the annular filter belt 230 is in close contact with the top contact wheel 311, and the part of the annular filter belt 230 near the top of the filter belt shaping assembly is gradually guided into a slide with an arc-shaped cross section by the first shaping rod 310 and the second shaping rod 320 during the movement; the annular filter belt 230 located directly above the filter belt shaping assembly is shaped into a slide with an arc-shaped cross section, which can bear more material per unit time and is less likely to overflow when bearing more material.

[0029] The material injection assembly is used to inject the material to be separated (a solid-liquid mixture) into the top of the annular filter belt 230. The main body is tubular, which is the prior art, and it is connected to the pump body. The material injection assembly includes an injection pipe 410 and a positioning frame 420. The injection pipe 410 is an inclined rigid pipe, which is fixed to the inner wall of the arc-shaped base plate 110 by the positioning frame 420 and is located directly above the filter belt shaping assembly.

[0030] The cleaning chamber 132 contains cleaning fluid, and has an inlet and an outlet on its side wall; the storage chamber 131 has an outlet near its bottom; the cleaning fluid is preferably clean water. The outlets of both the cleaning chamber 132 and the storage chamber 131 are connected to a water pump.

[0031] Preferably, the inlet of the cleaning chamber 132 continuously or indirectly receives liquid, and the outlet continuously or indirectly discharges liquid.

[0032] like Figure 3 As shown, the immersion cleaning assembly is used to immerse the lower annular filter belt 230 located in the cleaning chamber 132 into the liquid within the cleaning chamber 132 by means of rollers; the immersion cleaning assembly includes guide rollers 510; the guide rollers 510 are cylindrical rollers, there are multiple rollers, and at least three rollers, the axial direction of which is perpendicular to the length direction of the arc-shaped base plate 110, and they are rotatably connected to the concave surface of the arc-shaped base plate 110 around their own axis; the multiple guide rollers 510 guide the annular filter belt 230 to immerse it in the cleaning liquid for washing.

[0033] Preferably, the immersion cleaning assembly further includes a spray cleaning strip, which is coaxial with the guide roller 510 and located close to one of the guide rollers 510. It is a rigid rod with a hollow interior and a long strip-shaped output groove on one side, fixed to the concave surface of the arc-shaped base plate 110, and connected to a water pump or air pump. It sprays airflow or water flow toward the annular filter belt 230 immersed in liquid to assist it in efficient cleaning and unblocking.

[0034] The power assembly is used to provide power for the operation of various components of the waste treatment equipment during the hydrothermal liquefaction process of this application, and the control unit plays the role of controlling the coordinated operation of various components of the waste treatment equipment during the hydrothermal liquefaction process. Both of these are existing technologies and will not be described in detail here.

[0035] Preferably, the control unit is a combination of a programmable logic controller and control buttons.

[0036] When the waste treatment equipment used in the hydrothermal liquefaction process of this application is used: Control the continuous or intermittent delivery of the material to be processed to the filter belt assembly 200 located directly above the filter belt shaping assembly; The annular filter belt 230 is controlled to rotate continuously, and the rotation process separates the solid and liquid materials. The solid material is conveyed by the filter belt assembly 200 and moves gradually towards the working scraper 121 until it is removed from the filter belt assembly 200. The liquid material falls into the storage tank 131 and is then discharged. When the annular filter belt 230 rotates, the carrier container 100 is controlled to swing back and forth, which improves the utilization rate of the filter holes on the annular filter belt 230 and makes the material to be filtered move back and forth along the width direction of the annular filter belt 230, thereby greatly improving the filtration efficiency.

[0037] To further improve the solid-liquid separation effect of materials (so that the separation is more complete and thorough), such as Figure 6As shown, preferably, the waste treatment equipment in the hydrothermal liquefaction process of this application further includes an extrusion drying component; the extrusion drying component is located directly above the liquid storage tank 131 and away from the cleaning tank 132, and is used to squeeze out most of the water mixed in with the annular filter belt 230 by extrusion. The extrusion drying assembly includes at least two bottom roller bodies 610, and also includes a top pressure assembly; like Figure 7 As shown, the bottom roller 610 is a horizontally placed rigid roller, perpendicular to the length direction of the arc-shaped base plate 110, located in the space enclosed by the annular filter belt 230, away from the cleaning chamber 132 and the filter belt shaping assembly, always in contact with the inner ring of the annular filter belt 230, and rotates around its own axis to be connected to the inner wall of the arc-shaped base plate 110, playing a supporting role; the distance between the bottom rollers 610 is less than 40 cm; The top pressure assembly is positioned directly above the bottom roller 610, and together with the bottom roller 610, clamps the annular filter belt 230 in the middle. The top pressure assembly includes a support frame 620, a vertical telescopic rod 630, a connecting frame 640, a first working roller 660, a second working roller 670, and an annular pressure belt 680. The support frame 620 is a rigid support fixed to the arc-shaped base plate 110 and serves as a load-bearing component. The vertical telescopic rod 630, along with the vertical rigid telescopic rod, is fixed to the support frame 620 and extends and retracts in a controlled manner, with its axial direction perpendicular to the length direction of the arc-shaped base plate 110. The connecting frame 640 is a rigid frame fixed to the bottom of the vertical telescopic rod 630 and is used to support... The first working roller 660 and the second working roller 670 are supported; both the first working roller 660 and the second working roller 670 are horizontally placed rigid rollers with a distance of less than 60 cm between them, located above the bottom roller body 610; both the first working roller 660 and the second working roller 670 are rotatably connected to the connecting frame 640 around their own axis; the annular pressure belt 680 is an annular strip filter screen, which is fitted on the first working roller 660 and the second working roller 670 and supported by them to form an elongated oval shape; during the operation of the waste treatment equipment in the hydrothermal liquefaction process of this application, the distance between the top pressure component and the filter belt component 200 is adjusted as needed (to select the separation effect as needed) to squeeze the filtered solid material.

[0038] Preferably, at least one of the first working roller 660 and the second working roller 670 rotates under the coordinated control of the power assembly and the control unit; the annular pressure belt 680 operates at the same speed as the annular filter belt 230.

[0039] Preferred, such as Figure 7As shown, the connecting frame 640 is rotatably connected to the bottom of the vertical telescopic rod 630, and the axial direction of the rotating shaft is the same as that of the bottom roller body 610. It rotates under the drive of the rotation drive assembly 650. The rotation drive assembly 650 is preferably a telescopic rod structure with controlled extension and retraction. In use, the rotation of the connecting frame 640 is controlled as needed to adjust the posture of the annular pressure belt 680 and thus obtain different extrusion and separation effects.

[0040] Preferred, such as Figure 8 and Figure 9 As shown, the bottom roller 610 is a roller that is thinner in the middle and thicker at both ends; the first working roller 660 and the second working roller 670 are both rollers that are thicker in the middle and thinner at both ends; the annular pressure belt 680 fitted on the first working roller 660 and the second working roller 670 is also shaped by the two to have a bulge in the middle; the extrusion drying assembly also includes a water-absorbing column 690; the water-absorbing column 690 is fixed to the connecting carrier 640 by a tube frame 691, which is a rigid support; the water-absorbing column 690 is a horizontal column, located in the space enclosed by the annular pressure belt 680 and its bottom is set near the middle of the inner circle of the annular pressure belt 680; the water-absorbing column 690 is hollow inside and has multiple through holes for water absorption at the bottom; the water-absorbing column 690 is connected to a water pump to absorb the squeezed water and discharge it, thereby greatly improving the solid-liquid separation efficiency.

[0041] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: This invention solves the technical problems of low pore utilization rate of filter components in waste treatment equipment during hydrothermal liquefaction, the need for manual cleaning and frequent replacement of filter components, and poor stability of filtration and separation in existing technologies. It achieves the technical effects of high pore utilization rate of filter components in waste treatment equipment during hydrothermal liquefaction, no need for manual cleaning of filter components, automatic and continuous unblocking and cleaning of filter components, no need for frequent replacement of filter components, and good stability of solid-liquid mixture separation effect.

[0042] Example 2

[0043] Considering that the annular pressure belt 680 in the above embodiments cannot be automatically cleaned and requires regular maintenance, otherwise it will affect the processing efficiency and stability of the extrusion drying operation to a certain extent; and that controlling the synchronous operation of the annular pressure belt 680 and the annular filter belt 230 also requires the coordinated operation of multiple servo motors, resulting in relatively high manufacturing costs; therefore, this application embodiment optimizes and improves the structure of the waste treatment equipment in the hydrothermal liquefaction process based on the above embodiments, eliminating the setting of the annular pressure belt 680 and adding a belt torsion assembly, using multiple rollers to guide the movement of the annular filter belt 230 so that it is fitted onto the first working roller 660 and the second working roller 670, thereby replacing the annular pressure belt 680; specifically: like Figures 10 to 12As shown, the belt torsion assembly is positioned directly above the arc-shaped base plate 110 and includes a horizontal guide roller group 710, a vertical guide roller group 720, a guide roller group 730, and a roller carrier 740. The horizontal guide roller group 710 consists of multiple horizontally placed rigid rollers, positioned directly above the cleaning chamber 132, and is used to guide the movement of the annular filter belt 230; the vertical guide roller group 720 consists of multiple vertically placed rigid rollers, positioned directly above the filter belt shaping assembly, and is used to guide the movement of the annular filter belt 230; the guide roller group 730 consists of multiple horizontally placed rigid rollers, positioned directly above the extrusion drying assembly, and is used to guide the movement of the annular filter belt 230. The annular filter belt 230 is twisted 180 degrees as a whole under the guidance of the horizontal guide roller group 710, the vertical guide roller group 720 and the guide roller group 730; The roller support frame 740 is a vertical rigid frame fixed on the arc-shaped base plate 110. There are multiple such frames, which serve to support and bear the multiple rollers of the belt torsion assembly. The annular filter belt 230 is U-shaped with its opening facing one side, guided by the first end roller 210, the second end roller 220, the horizontal guide roller group 710, the vertical guide roller group 720, the guide roller group 730, the first working roller 660, and the second working roller 670. By replacing the annular pressure belt 680 with the annular filter belt 230, the maintenance frequency can be effectively reduced. The first working roller 660 and the second working roller 670 no longer require power. The overall manufacturing and use costs of the waste treatment equipment in the hydrothermal liquefaction process will be greatly reduced.

[0044] Preferably, at least one of the roller frame 740 supporting the horizontal guide roller group 710, the vertical guide roller group 720 and the guide roller group 730 can extend and retract under the coordinated control of the power component and the control unit, and enter a taut state in which the annular filter belt 230 can be adjusted as needed.

[0045] Preferably, an air jet cleaning component 750 is positioned on the roller carrier 740 near the vertical guide roller group 720; the air jet cleaning component 750 is a vertically placed rigid hollow column, which is connected to the air pump and is located in the space enclosed by the annular filter belt 230. When air is sprayed, it can unclog the annular filter belt 230; because the annular filter belt 230 is twisted, the filter holes of the annular filter belt 230 will also deform with the twist, making it easier to unclog and clean.

[0046] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. For those skilled in the art, the present invention can have various modifications and variations. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A waste treatment device for hydrothermal liquefaction processes, characterized in that: Includes a carrier container (100), a filter belt assembly (200), a filter belt shaping assembly, a material injection assembly, and an immersion cleaning assembly; The carrying container (100) is a horizontally placed hollow semi-cylindrical shape with an open top, which serves to contain and support. The component that serves to contain is controlled to swing around its own length direction. The internal space is divided into a liquid storage chamber (131) and a cleaning chamber (132). The filter belt assembly (200) includes a first end roller (210), a second end roller (220), and an annular filter belt (230); the first end roller (210) and the second end roller (220) are respectively positioned on the inner wall of the carrying container (100) near both ends; the annular filter belt (230) is an annular strip filter screen, which is sleeved on the first end roller (210) and the second end roller (220); The filter belt shaping assembly is used to shape the upper part of the annular filter belt (230) located directly above the liquid storage tank (131) by abutting against the annular filter belt (230), shaping the part of the annular filter belt (230) into a slide shape so as to receive and transport the material from the material injection assembly; The material injection assembly is used to inject the material to be separated into the top of the annular filter belt (230), and its main body is tubular. The immersion cleaning assembly immerses the lower annular filter belt (230) located in the cleaning chamber (132) in the liquid within the cleaning chamber (132) via roller guidance.

2. The waste treatment equipment in the hydrothermal liquefaction process as described in claim 1, characterized in that: The carrying container (100) includes an arc-shaped base plate (110), an end cap plate (120), and a partition plate (130); The arc-shaped base plate (110) is a horizontally placed arc-shaped strip plate; The end sealing plate (120) is a vertical rigid plate, and there are two of them, which are fixed at both ends of the arc-shaped base plate (110); The curved base plate (110) and the two end caps (120) together form a semi-cylindrical space; The partition plate (130) is a vertical rigid plate fixed on the concave surface of the arc-shaped base plate (110), dividing the space enclosed by the arc-shaped base plate (110) and the two end sealing plates (120) into a liquid storage chamber (131) for containing the filtered liquid product and a cleaning chamber (132) for cleaning the filter belt assembly (200).

3. The waste treatment equipment in the hydrothermal liquefaction process as described in claim 2, characterized in that: The filter belt shaping assembly includes a first shaping rod (310), a second shaping rod (320), and a support bracket (330) that serves as a connecting and supporting element; The first shaping rod (310) and the second shaping rod (320) are both arc-shaped bent rods. They are set at the same height and are fixed to the inner wall of the arc-shaped base plate (110) by the bearing bracket (330). The openings face upwards. Both are located in the space enclosed by the annular filter belt (230). One or more rows of top contact wheels (311) are provided on the concave surface near the top of both to reduce the moving friction of the annular filter belt (230). The top contact wheel (311) is a cylindrical wheel body; The first shaping rod (310) and the second shaping rod (320) have different bending radii, with the latter having a larger bending radius; The number of the first shaping rod (310) is one; There are two second shaping rods (320), located on both sides of the first shaping rod (310); The inner ring of the annular filter belt (230) is in close contact with the top contact wheel (311). The part of the annular filter belt (230) near the top of the filter belt shaping assembly is gradually guided into a slide with an arc cross section by the first shaping rod (310) and the second shaping rod (320) during the movement.

4. The waste treatment equipment in the hydrothermal liquefaction process as described in claim 2, characterized in that: The immersion cleaning assembly includes a guide roller (510); The guide roller (510) is a cylindrical roller, there are multiple rollers, and at least 3 rollers. The axial direction is perpendicular to the length direction of the arc base plate (110), and it is rotatably connected to the concave surface of the arc base plate (110) around its own axis. Multiple guide rollers (510) guide the annular filter belt (230) to be immersed in the cleaning solution for washing.

5. The waste treatment equipment in the hydrothermal liquefaction process as described in claim 1, characterized in that: It also includes an extrusion drying component; The extrusion drying assembly is located directly above the liquid storage chamber (131) and away from the cleaning chamber (132); The extrusion drying assembly includes at least two bottom roller bodies (610) and also includes a top pressure assembly; The bottom roller body (610) is located in the space enclosed by the annular filter belt (230) away from the cleaning chamber (132) and the filter belt shaping assembly, and always abuts against the inner ring of the annular filter belt (230); The top pressure assembly is positioned directly above the bottom roller body (610); The top pressure assembly includes a support frame (620), a vertical telescopic rod (630), a connecting frame (640), a first working roller (660), a second working roller (670), and an annular pressure belt (680); The support frame (620) is fixed on the arc-shaped base plate (110); The vertical telescopic rod (630) and the vertical rigid telescopic rod are fixed on the support frame (620), and their axial direction is perpendicular to the length direction of the arc-shaped base plate (110). The connecting frame (640) is a rigid frame that is fixed to the bottom of the vertical telescopic rod (630); The first working roller (660) and the second working roller (670) are both horizontally placed hard rollers located above the bottom roller body (610) and are rotatably connected to the connecting frame (640) around their own axis. The annular pressure belt (680) is an annular strip filter screen, which is fitted onto the first working roller (660) and the second working roller (670) and supported by the two to form an elongated oval shape.

6. The waste treatment equipment in the hydrothermal liquefaction process as described in claim 5, characterized in that: The connecting frame (640) is rotatably connected to the bottom of the vertical telescopic rod (630), and the axial direction of the rotating shaft is the same as that of the bottom roller (610), and it rotates under the drive of the rotating drive assembly (650). The rotation drive assembly (650) is a telescopic rod structure with controlled extension and retraction; When in use, the connecting frame (640) is rotated as needed to adjust the posture of the annular pressure belt (680) and thus obtain different extrusion and separation effects.

7. The waste treatment equipment in the hydrothermal liquefaction process as described in claim 5, characterized in that: The bottom roller body (610) is a roller that is thin in the middle and thick at both ends; The first working roller (660) and the second working roller (670) are both rollers that are thick in the middle and thin at both ends; The annular pressure strip (680) fitted on the first working roller (660) and the second working roller (670) is also bulged in the middle by the two; The extrusion drying assembly also includes a water-absorbing column (690); The water-absorbing column (690) is fixed to the connecting carrier (640) by a tube frame (691) that is a rigid support; The water-absorbing column (690) is a horizontal column located in the space enclosed by the annular pressure belt (680) and its bottom is set near the middle of the inner ring of the annular pressure belt (680). The water-absorbing column (690) is hollow inside and has multiple through holes at the bottom for water absorption; The suction column (690) is connected to the water pump and is used to draw out the squeezed water and discharge it.

8. The waste treatment equipment in the hydrothermal liquefaction process as described in any one of claims 5 to 7, characterized in that: The annular pressure belt (680) is removed, and a belt torsion assembly is added, using an annular filter belt 230 to replace the annular pressure belt (680); The belt torsion assembly is positioned directly above the arc-shaped base plate (110) and includes a horizontal guide roller group (710), a vertical guide roller group (720), a guide roller group (730), and a roller carrier frame (740). The horizontal guide roller group (710) consists of multiple horizontally placed rigid rollers, positioned directly above the cleaning chamber (132), for guiding the movement of the annular filter belt (230); the vertical guide roller group (720) consists of multiple vertically placed rigid rollers, positioned directly above the filter belt shaping assembly, for guiding the movement of the annular filter belt (230); the guide roller group (730) consists of multiple horizontally placed rigid rollers, positioned directly above the extrusion drying assembly, for guiding the movement of the annular filter belt (230). The annular filter belt (230) is twisted by 180 degrees under the guidance of the horizontal guide roller group (710), the vertical guide roller group (720) and the guide roller group (730); The roller support frame (740) is a vertical rigid frame fixed on the arc-shaped base plate (110). There are multiple such frames, which serve to support and bear the multiple rollers of the belt torsion assembly. The annular filter belt (230) is U-shaped with its opening facing one side, guided by the first end roller (210), the second end roller (220), the horizontal guide roller group (710), the vertical guide roller group (720), the guide roller group (730), the first working roller (660), and the second working roller (670).

9. The waste treatment equipment in the hydrothermal liquefaction process as described in claim 8, characterized in that: An air jet cleaning assembly (750) is positioned on the roller carrier (740) near the vertical guide roller assembly (720); The jet cleaning component (750) is a vertical rigid hollow column, which is connected to the air pump and is located in the space enclosed by the annular filter belt (230). When the jet is sprayed, it can clear the annular filter belt (230). Because the annular filter belt (230) is twisted, the filter holes of the annular filter belt (230) will also deform with the twist, making it easier to unclog and clean.

10. A method for treating waste during hydrothermal liquefaction, characterized in that: The waste treatment equipment for hydrothermal liquefaction process as described in claim 1 is used to perform solid-liquid separation of the product; during the treatment: the material to be treated is continuously or intermittently transported to the filter belt assembly (200) located directly above the filter belt shaping assembly; The annular filter belt (230) is controlled to rotate continuously, and the material is separated into solid and liquid during the rotation process; Solid materials are conveyed and moved by the filter belt assembly (200) and gradually detach from the filter belt assembly (200); liquid materials fall into the storage tank (131) and are then discharged. When the annular filter belt (230) rotates, the carrier container (100) is controlled to swing back and forth, which improves the utilization rate of the filter holes on the annular filter belt (230) and makes the material to be filtered move back and forth along the width direction of the annular filter belt (230).

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