A two-stage co-liquefaction mixing-reaction-filtration-heat recovery integrated device

Abstract

The present invention provides a two-stage co-liquefaction mixing-reaction-filtration-heat recovery integrated device, which realizes the realization of a two-stage hydrothermal liquefaction process; secondly, nozzles, receiving chambers, mixing chambers and diffusion chambers are arranged at the inlets of different materials and media, and high-speed fluids are collided and mixed in these structures; the hydrothermal liquefaction heat of the first stage comes from the heat of the hydrothermal liquefaction product of the second stage, and the occurrence of the hydrothermal liquefaction reaction in the first stage and the recovery rate of the heat of the hydrothermal liquefaction product of the second stage are realized at the same time, thereby improving the economy; in the first stage hydrothermal liquefaction process, through the setting of a high-temperature and high-pressure needle valve, accurate control of different reaction times is achieved, thereby selecting different first stage hydrothermal liquefaction reaction times according to different material properties; the first stage hydrothermal liquefaction reaction tube is set with an inclination of 1-3°, and a slag scraping device and a salt scraping device are set in the second stage hydrothermal liquefaction generation chamber, thereby ensuring the stable operation of the reactor.

Description

Technical Field

[0001] The invention relates to the technical field of hydrothermal liquefaction equipment, and in particular to a two-stage co-liquefaction mixing-reaction-filtration-heat recovery integrated device. Background Art

[0002] Co-hydrothermal liquefaction is a method of combining two or more raw materials for hydrothermal liquefaction. Mixing different materials together to participate in the reaction can not only produce a simple superposition effect, but also produce a composite effect due to the synergistic or antagonistic effects of these materials. Experimental studies have found that co-hydrothermal liquefaction between different material compositions has a significant synergistic effect, and high-quality and high-yield bio-crude oil can often be obtained. Therefore, the development of advanced and efficient co-hydrothermal liquefaction technology, efficient biomass conversion, and biomass resource utilization have become a new direction for the development of hydrothermal technology.

[0003] Two-stage hydrothermal liquefaction is a hydrothermal treatment at low temperature in the first stage, followed by hydrothermal liquefaction under more stringent conditions. The presence of low-temperature hydrothermal treatment significantly affects the final elemental composition, HHV, energy recovery rate, molecular components, TOC concentration of the aqueous phase, and solid yield. The potential energy consumption savings and reduced reaction temperature lead to reduced equipment costs, which shows that two-stage hydrothermal liquefaction is an ideal liquefaction process.

[0004] At present, most of the designed hydrothermal liquefaction reaction systems are one-way single-substance hydrothermal liquefaction reactions. The traditional hydrothermal liquefaction reactor is a simple tubular reactor, which has the following problems during use: there is no reactor suitable for two-stage hydrothermal liquefaction; the material mixer, reactor, solid product filter, and heat recovery of the hydrothermal liquefaction are separate, resulting in a complex system and high equipment cost; there are high concentrations of salt and ash in biomass, especially urban sludge, and there is a risk of serious blockage of the pipeline due to salt deposition due to excessive temperature; the simple multiple material inlet setting has low material and medium mixing efficiency, and different component molecules cannot fully contact each other.

[0005] Therefore, in order to solve the above problems and realize the two-stage co-hydrothermal liquefaction of multiple biomasses, there is an urgent need for a highly integrated device that can achieve efficient mixing, perform two-stage hydrothermal liquefaction reactions, and separate the solid phase in the hydrothermal liquefaction products. Summary of the invention

[0006] In order to overcome the defects of the above-mentioned prior art, the purpose of the present invention is to provide a two-stage co-liquefaction mixing-reaction-filtration-heat recovery integrated device to solve the technical problems in the prior art that the mixing efficiency of various materials and media is low; the material mixer, reactor, solid phase product filter, and heat recovery of the hydrothermal liquefaction are separate and complex in structure, and two-stage hydrothermal liquefaction cannot be achieved; and the biomass has the problem of excessively high temperature and salt deposition that seriously blocks the pipeline.

[0007] The present invention is achieved through the following technical solutions:

[0008] A two-stage co-liquefaction mixing-reaction-filtration-heat recovery integrated device comprises a first-stage hydrothermal liquefaction generating chamber, a second-stage hydrothermal liquefaction generating chamber and a medium-temperature hydrothermal transition product collection box; a plurality of material feed ports and medium feed ports are arranged on one side of the top of the first-stage hydrothermal liquefaction generating chamber, a high-temperature hydrothermal product feed port is arranged on the other side of the top, a hydrothermal final product discharge port is arranged on the bottom, a plurality of first-stage hydrothermal liquefaction reaction tubes are arranged longitudinally inside, and the plurality of first-stage hydrothermal liquefaction reaction tubes are connected in sequence, one end of each first-stage hydrothermal liquefaction reaction tube extends out through the inner wall of the first-stage hydrothermal liquefaction generating chamber and is connected to the input end of the medium-temperature hydrothermal transition product collection box, and one end of the first-stage hydrothermal liquefaction reaction tube at the top is connected to a plurality of material feed ports and medium feed ports; a plurality of first-stage hydrothermal liquefaction reaction tubes are arranged on the side wall of the bottom end of the second-stage hydrothermal liquefaction generating chamber A medium-temperature hydrothermal transition product feed port, and an output end of a medium-temperature hydrothermal transition product collection box is connected to the medium-temperature hydrothermal transition product feed port; a second baffle tube and a first baffle tube are coaxially arranged along the inner wall to the center position in the second-stage hydrothermal liquefaction chamber; a heating zone is formed between the outer wall of the second baffle tube and the inner wall of the second-stage hydrothermal liquefaction chamber, a catalytic zone is formed between the second baffle tube and the first baffle tube and is provided with a plurality of catalyst grids, an insulation zone is formed in the first baffle tube, a high-temperature hydrothermal product discharge port is arranged at the top of the second-stage hydrothermal liquefaction chamber corresponding to the insulation zone, and the high-temperature hydrothermal product discharge port is connected to the high-temperature hydrothermal product feed port, a slag cleaning mechanism is arranged in the first baffle tube, a second slag discharge port is arranged at the bottom end of the second-stage hydrothermal liquefaction chamber, and a first slag discharge port is also arranged on the outer side of the bottom of the second-stage hydrothermal liquefaction chamber.

[0009] Preferably, a nozzle is provided between the plurality of material feed ports and the medium feed port and one end of the first-stage hydrothermal liquefaction reaction tube at the top, wherein one end of the nozzle is provided with multiple pipelines, which are sequentially connected to the plurality of material feed ports and the medium feed port, and the other end of the nozzle is a single pipeline, which is connected to one end of the first-stage hydrothermal liquefaction reaction tube;

[0010] A receiving tube, a mixing tube and a diffusion tube are arranged in sequence between the single pipeline and one end of the first-stage hydrothermal liquefaction reaction tube, wherein the receiving tube, the mixing tube and the diffusion tube are all of different diameter structures.

[0011] Preferably, each first-stage hydrothermal liquefaction reaction tube is provided with an inclination angle of 1-3°.

[0012] Preferably, a high-temperature and high-pressure needle valve is provided at one end of each first-stage hydrothermal liquefaction reaction tube close to the medium-temperature hydrothermal transition product manifold and between each first-stage hydrothermal liquefaction reaction tube.

[0013] Preferably, an electric heating coil is provided between the second insulation layer and the outer wall of the second-stage hydrothermal liquefaction chamber.

[0014] Preferably, a filter screen is provided on the top of the first baffle cylinder, and the slag cleaning mechanism extends into the first baffle cylinder through the filter screen.

[0015] Furthermore, the slag cleaning mechanism includes a motor, a rotating shaft, a slag scraping device and a salt scraping device; one end of the rotating shaft is equipped with the motor, and the other end extends into the first baffle cylinder through a filter screen, and the slag scraping device and the salt scraping device are respectively installed on the rotating shaft in the first baffle cylinder.

[0016] Preferably, a microwave controller is provided on the first-stage hydrothermal liquefaction chamber, and a plurality of microwave generators are provided on both the first-stage hydrothermal liquefaction chamber and the second-stage hydrothermal liquefaction chamber.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] The present invention provides a two-stage co-liquefaction mixing-reaction-filtration-heat recovery integrated device, which realizes the two-stage hydrothermal liquefaction process; secondly, nozzles, receiving chambers, mixing chambers and diffusion chambers are arranged at the inlets of different materials and media, and high-speed fluids are collided and mixed in these structures; thirdly, the hydrothermal liquefaction heat of the first stage comes from the heat of the hydrothermal liquefaction product of the second stage, and at the same time, the occurrence of the hydrothermal liquefaction reaction in the first stage and the recovery rate of the heat of the hydrothermal liquefaction product of the second stage are realized, thereby improving the economy; thirdly, in the first stage hydrothermal liquefaction process, the precise control of different reaction times is realized by the setting of a high-temperature and high-pressure needle valve, so that different first stage hydrothermal liquefaction reaction times are selected according to different material properties; finally, the first stage hydrothermal liquefaction reaction tube is set with an inclination of 1-3°, and a slag scraping device and a salt scraping device are set in the second stage hydrothermal liquefaction generation chamber, thereby ensuring the stable operation of the reactor. The device is a highly integrated device that realizes the coupling of mixing, reaction, filtration and heat recovery processes, greatly reducing the complexity and construction cost of the system. It utilizes the new liquefaction process of co-hydrothermal liquefaction and two-stage hydrothermal liquefaction to obtain high-yield and high-quality bio-crude oil, improves the economy of the system, and promotes the industrial development of hydrothermal liquefaction technology.

[0019] Furthermore, a nozzle is provided between the plurality of material feed ports and the medium feed port and one end of the first-stage hydrothermal liquefaction reaction tube at the top, wherein one end of the nozzle is provided with multiple pipelines, which are sequentially connected to the plurality of material feed ports and the medium feed port, and the other end of the nozzle is a single pipeline, which is connected to one end of the first-stage hydrothermal liquefaction reaction tube, and a receiving tube, a mixing tube and a diffusion tube are sequentially provided between the single pipeline and one end of the first-stage hydrothermal liquefaction reaction tube, wherein the receiving tube, the mixing tube and the diffusion tube are all of different diameter structures, thereby improving the mixing efficiency between the plurality of materials and the medium.

[0020] Furthermore, a high-temperature and high-pressure needle valve is provided at one end of each first-stage hydrothermal liquefaction reaction tube close to the medium-temperature hydrothermal transition product collection box and between each first-stage hydrothermal liquefaction reaction tube. The outflow of the first-stage hydrothermal liquefaction product is controlled by opening and closing the high-temperature and high-pressure needle valve, thereby achieving precise control of the first-stage hydrothermal liquefaction reaction time.

[0021] Furthermore, a plurality of catalyst grids are provided in the catalytic zone between the second baffle tube and the first baffle tube, which effectively promote the occurrence of the hydrothermal liquefaction reaction.

[0022] Furthermore, a filter screen is provided on the top of the first baffle cylinder, and the slag cleaning mechanism extends into the first baffle cylinder through the filter screen to achieve separation of solid phase products in the hydrothermal liquefaction product.

[0023] Furthermore, the slag cleaning mechanism includes a motor, a rotating shaft, a slag scraping device and a salt scraping device; one end of the rotating shaft is equipped with the motor, and the other end extends into the first baffle cylinder through the filter screen, and the slag scraping device and the salt scraping device are respectively installed on the rotating shaft in the first baffle cylinder, so as to realize continuous and efficient operation of the filter screen and reduce salt deposition on the inner wall of the reactor.

[0024] Furthermore, a microwave controller is provided on the first-stage hydrothermal liquefaction chamber, and a plurality of microwave generators are provided on both the first-stage hydrothermal liquefaction chamber and the second-stage hydrothermal liquefaction chamber to assist the hydrothermal liquefaction reaction and improve the yield and quality of the bio-crude oil. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural diagram of the reactor of the present invention.

[0026] In the figure: 1-first material feed port; 2-first insulation layer; 3-high-temperature hydrothermal product feed port; 4-high-temperature hydrothermal product discharge port; 5-motor; 6-filter; 7-first baffle cylinder; 8-electric heating coil; 9-second insulation layer; 10-second stage hydrothermal liquefaction chamber; 11-slag scraping device; 12-catalyst grid; 13-second baffle cylinder; 14-first slag discharge port; 15-salt scraping device; 16-second slag discharge port; 17-medium temperature hydrothermal Transition product feed port; 18-medium-temperature hydrothermal transition product collection box; 19-first stage hydrothermal liquefaction generation chamber; 20-first stage hydrothermal liquefaction reaction tube; 21-microwave controller; 22-hydrothermal final product discharge port; 23-high-temperature and high-pressure needle valve; 24-microwave generator; 25-medium-temperature hydrothermal transition product discharge port; 26-mixing tube; 27-receiving tube; 28-nozzle; 29-second material feed port; 30-medium feed port; 31-diffusion tube. DETAILED DESCRIPTION

[0027] 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.

[0028] It should be noted that the terms "first", "second", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units that are clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0029] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0030] The purpose of the present invention is to provide a two-stage co-liquefaction mixing-reaction-filtration-heat recovery integrated device to solve the technical problems in the prior art that the mixing efficiency of multiple materials and media is low; the material mixer, reactor, solid phase product filter, and heat recovery of hydrothermal liquefaction are separate and complex in structure, making it impossible to achieve two-stage hydrothermal liquefaction; and the presence of biomass with excessively high temperature and salt deposition that seriously clogs the pipeline.

[0031] Specifically, according to Figure 1 As shown, the two-stage co-liquefaction mixing-reaction-filtration-heat recovery integrated device includes a first-stage hydrothermal liquefaction chamber 19, a second-stage hydrothermal liquefaction chamber 10 and a medium-temperature hydrothermal transition product collection box 18; a plurality of material feed ports and a medium feed port 30 are provided on one side of the top of the first-stage hydrothermal liquefaction chamber 19, a high-temperature hydrothermal product feed port 3 is provided on the other side of the top, a hydrothermal final product discharge port 22 is provided on the bottom, and a plurality of first-stage hydrothermal liquefaction reaction tubes 20 are longitudinally provided inside, and the plurality of first-stage hydrothermal liquefaction reaction tubes 20 are connected in sequence, and one end of each first-stage hydrothermal liquefaction reaction tube 20 extends through the inner wall of the first-stage hydrothermal liquefaction chamber 19 and is connected to the input end of the medium-temperature hydrothermal transition product collection box 18, and one end of the first-stage hydrothermal liquefaction reaction tube 20 at the top is connected to a plurality of material feed ports and a medium feed port 30; a medium-temperature hydrothermal product feed port 3 is provided on the bottom side wall of the second-stage hydrothermal liquefaction chamber 10 A hydrothermal transition product feed port 17, and an output end of a medium-temperature hydrothermal transition product collection box 18 is connected to the medium-temperature hydrothermal transition product feed port 17; a second baffle tube 13 and a first baffle tube 7 are coaxially arranged along the inner wall to the center position in the second-stage hydrothermal liquefaction chamber 10; a heating zone is formed between the outer wall of the second baffle tube 13 and the inner wall of the second-stage hydrothermal liquefaction chamber 10, a catalytic zone is formed between the second baffle tube 13 and the first baffle tube 7, and a plurality of catalyst grids 12 are arranged; an insulation zone is formed in the first baffle tube 7, and a high-temperature hydrothermal product discharge port 4 is arranged at the top of the second-stage hydrothermal liquefaction chamber 10 corresponding to the insulation zone, and the high-temperature hydrothermal product discharge port 4 is connected to the high-temperature hydrothermal product feed port 3, a slag cleaning mechanism is arranged in the first baffle tube 7, a second slag discharge port 16 is arranged at the bottom end of the second-stage hydrothermal liquefaction chamber 10, and a first slag discharge port 14 is also arranged on the outer side of the bottom of the second-stage hydrothermal liquefaction chamber 10.

[0032] Specifically, a nozzle 28 is provided between a plurality of material feed ports and a medium feed port 30 and one end of the first-stage hydrothermal liquefaction reaction tube 20 at the top, wherein one end of the nozzle 28 is provided with multiple pipelines, which are connected to the plurality of material feed ports and the medium feed port 30 in sequence, and the other end of the nozzle 28 is a single pipeline, which is connected to one end of the first-stage hydrothermal liquefaction reaction tube 20.

[0033] Among them, a receiving tube 27, a mixing tube 26 and a diffusion tube 31 are arranged in sequence between the single pipeline and one end of the first-stage hydrothermal liquefaction reaction tube 20, wherein the receiving tube 27, the mixing tube 26 and the diffusion tube 31 are all of different diameter structures.

[0034] Specifically, each first-stage hydrothermal liquefaction reaction tube 20 is provided with an inclination angle of 1-3°.

[0035] Specifically, a high-temperature and high-pressure needle valve 23 is provided at one end of each first-stage hydrothermal liquefaction reaction tube 20 close to the medium-temperature hydrothermal transition product collection box 18 and between each first-stage hydrothermal liquefaction reaction tube 20 .

[0036] Specifically, an electric heating coil 8 is provided between the second insulation layer 9 and the outer wall of the second-stage hydrothermal liquefaction chamber 10 .

[0037] Specifically, a filter screen 6 is provided on the top of the first baffle cylinder 7 , and the slag cleaning mechanism extends into the first baffle cylinder 7 through the filter screen 6 .

[0038] Among them, the slag cleaning mechanism includes a motor 5, a rotating shaft, a slag scraping device 11 and a salt scraping device 15; one end of the rotating shaft is equipped with the motor 5, and the other end extends into the first baffle cylinder 7 through the filter 6, and the slag scraping device 11 and the salt scraping device 15 are respectively assembled on the rotating shaft in the first baffle cylinder 7.

[0039] Specifically, a microwave controller 21 is provided on the first-stage hydrothermal liquefaction chamber 19, and a plurality of microwave generators 24 are provided on both the first-stage hydrothermal liquefaction chamber 19 and the second-stage hydrothermal liquefaction chamber 10.

[0040] Example

[0041] This embodiment provides a microwave-assisted integrated two-stage co-liquefaction mixing-reaction-filtration device with precise reaction time control, comprising:

[0042] It includes a first-stage hydrothermal liquefaction generating chamber 19 and a second-stage hydrothermal liquefaction generating chamber 10;

[0043] The first stage hydrothermal liquefaction chamber 19 is provided with a first insulation layer 2 on the outer layer, a first stage hydrothermal liquefaction reaction tube 20 is provided inside, a material first feed port 1, a material second feed port 29 and a medium feed port 30 are provided on the upper left side, a high temperature hydrothermal product feed port 3 is provided on the upper right side, and a hydrothermal final product discharge port 22 is provided on the lower left side;

[0044] The second stage hydrothermal liquefaction chamber 10 is provided with a second insulation layer 9 and an electric heating coil 8 in sequence from the outside to the inside, and a coaxial first baffle / tube 7 and a second baffle / tube 13 are provided inside to divide the reaction zone of the second stage hydrothermal liquefaction chamber into a heating zone, a catalytic zone and a heat preservation zone, a filter screen 7 is provided on the upper side of the inside to separate the solid phase products from the hydrothermal liquefaction products, a high-temperature hydrothermal product discharge port 4 is provided on the top, and a second slag discharge port 16 and a first slag discharge port 14 are provided in the middle and right side of the bottom.

[0045] The reaction zone between the inner wall of the second stage hydrothermal liquefaction chamber 10 and the second baffle cylinder 13 is the heating zone, which heats the temperature from 150-250°C to 300-350°C. The reaction zone between the second baffle cylinder 13 and the first flow cylinder 7 is the catalytic zone, in which a catalyst grid 12 is provided to store the hydrothermal liquefaction heterogeneous catalyst. The reaction zone inside the first flow plate / cylinder 7 is the insulation zone, in which the material is maintained at 300-350°C for hydrothermal liquefaction reaction.

[0046] A motor 5 is provided outside the hydrothermal liquefaction chamber of the second stage, which drives a scraper device 11 and a salt scraper device 15 fixed on the shaft and arranged in the heat preservation zone to rotate through a rotating shaft, so as to scrape off the filter residue and salt deposited on the inner wall of the reactor and the filter screen.

[0047] The first-stage hydrothermal liquefaction chamber 19 has a medium-temperature hydrothermal transition product collecting box 18, a high-temperature and high-pressure needle valve 23, and a medium-temperature hydrothermal transition product discharge port 25. The outflow of the first-stage hydrothermal liquefaction product is controlled by opening and closing the high-temperature and high-pressure needle valve, thereby achieving precise control of the first-stage hydrothermal liquefaction reaction time. The outflowing medium-temperature hydrothermal liquefaction product is collected in the medium-temperature hydrothermal transition product collecting box 18, and then enters the second-stage hydrothermal liquefaction chamber through the medium-temperature hydrothermal transition product feed port to produce a more intense hydrothermal liquefaction reaction.

[0048] A nozzle 28, a receiving chamber 27, a mixing chamber 26 and a diffusion chamber 31 are arranged between the material and medium feed ports and the first-stage hydrothermal liquefaction reaction tube 20 to achieve sufficient mixing of the first material, the second material and the medium.

[0049] The first stage hydrothermal liquefaction reaction tube is set with an inclination angle of 1-3°.

[0050] A microwave controller 21 and a microwave generator 24 are arranged outside the reactor to assist the hydrothermal liquefaction reaction and improve the yield and quality of the bio-crude oil.

[0051] The two-stage co-liquefaction mixing-reaction-filtration-heat recovery integrated device provided by the present invention is used:

[0052] When the microalgae and sludge are hydrothermally liquefied together, they enter the first-stage hydrothermal liquefaction chamber 19 from the first material feed port 1 and the second material feed port 2 respectively, and the water medium enters the first-stage hydrothermal liquefaction chamber 19 from the medium inlet, so that the sludge, microalgae and water reach a suitable ratio. The mixed reactant slurry descends along the first-stage hydrothermal liquefaction reaction tube 20, and is heated by the medium heat coming out of the second-stage hydrothermal liquefaction chamber 10, and the temperature is 150-250°C, and a medium-temperature hydrothermal liquefaction reaction occurs. After 20 minutes, when the required first-stage reaction time is reached, the medium-temperature hydrothermal transition product is discharged from the medium-temperature hydrothermal transition product outlet 25 through the high-temperature and high-pressure needle valve 23, and flows into the second-stage hydrothermal liquefaction chamber 10 for high-temperature hydrothermal liquefaction reaction.

[0053] The slurry entering the second-stage hydrothermal liquefaction chamber 10 through the medium-temperature hydrothermal transition product feed port 17 is first heated in the reaction zone, and the temperature is raised to 350°C by the electric heating coil 8, and then returns to the catalytic reaction zone through the baffle tube. Through the catalytic grid set in the reaction zone, the organic compound is efficiently converted under the action of the heterogeneous catalyst. The slurry reaching the bottom is returned again under the action of the baffle plate, and after the solid phase in the product is filtered through the filter screen 6 at the top, it is discharged from the high-temperature hydrothermal product discharge port 4 on the upper left side, enters the first-stage hydrothermal liquefaction chamber 19 to heat the entering slurry, and finally is discharged from the hydrothermal final product discharge port 22 on the lower left side of the first-stage hydrothermal liquefaction chamber 19.

[0054] During the whole process, the motor 5 above the second-stage hydrothermal liquefaction chamber 10 drives the scraper device 11 and the salt scraper device 15 in the second-stage hydrothermal liquefaction chamber 10 to rotate, clean the filter residue and salt layer deposited on the inner wall of the reactor and the filter screen 6, and discharge them from the slag discharge port at the bottom after the reaction is completed.

[0055] In summary, the present invention provides a two-stage co-liquefaction mixing-reaction-filtration-heat recovery integrated device, which realizes the two-stage hydrothermal liquefaction process; secondly, nozzles, receiving chambers, mixing chambers and diffusion chambers are arranged at the inlets of different materials and media, and high-speed fluids are collided and mixed in these structures; thirdly, the heat of hydrothermal liquefaction in the first stage comes from the heat of the hydrothermal liquefaction product in the second stage, and at the same time, the occurrence of the hydrothermal liquefaction reaction in the first stage and the recovery rate of the heat of the hydrothermal liquefaction product in the second stage are realized, thereby improving the economy; thirdly, in the first stage hydrothermal liquefaction process, through the setting of a high-temperature and high-pressure needle valve, precise control of different reaction times is achieved, thereby selecting different first stage hydrothermal liquefaction reaction times according to different material properties; finally, the first stage hydrothermal liquefaction reaction tube is set with an inclination of 1-3°, and a slag scraping device and a salt scraping device are set in the second stage hydrothermal liquefaction generation chamber to ensure the stable operation of the reactor. The device is a highly integrated device that realizes the coupling of mixing, reaction, filtration and heat recovery processes, greatly reducing the complexity and construction cost of the system. It utilizes the new liquefaction process of co-hydrothermal liquefaction and two-stage hydrothermal liquefaction to obtain high-yield and high-quality bio-crude oil, improves the economy of the system, and promotes the industrial development of hydrothermal liquefaction technology.

[0056] 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 two-stage co-liquefaction mixing-reaction-filtration-heat recovery integrated device, characterized in that: The invention comprises a first-stage hydrothermal liquefaction chamber (19), a second-stage hydrothermal liquefaction chamber (10) and a medium-temperature hydrothermal transition product collection box (18); a first-stage hydrothermal liquefaction chamber (19) is provided with a plurality of material feed ports and a medium feed port (30) on one side of the top, a high-temperature hydrothermal product feed port (3) on the other side of the top, a hydrothermal final product discharge port (22) on the bottom, a plurality of first-stage hydrothermal liquefaction reaction tubes (20) and a plurality of first-stage hydrothermal liquefaction reaction tubes (2 0) are sequentially connected, one end of each first-stage hydrothermal liquefaction reaction tube (20) extends through the inner wall of the first-stage hydrothermal liquefaction generation chamber (19) and is connected to the input end of the medium-temperature hydrothermal transition product collection box (18), and one end of the first-stage hydrothermal liquefaction reaction tube (20) at the top is connected to a plurality of material feed ports and a medium feed port (30); a medium-temperature hydrothermal transition product feed port (17) is provided on the bottom side wall of the second-stage hydrothermal liquefaction generation chamber (10), and a medium-temperature hydrothermal transition product collection box (18) is connected to the input end of the medium-temperature hydrothermal transition product collection box (18). The output end of the header (18) is connected to the medium-temperature hydrothermal transition product feed port (17); a second baffle cylinder (13) and a first baffle cylinder (7) are coaxially arranged along the inner wall to the center position in the second-stage hydrothermal liquefaction chamber (10); a heating zone is formed between the outer wall of the second baffle cylinder (13) and the inner wall of the second-stage hydrothermal liquefaction chamber (10); a catalytic zone is formed between the second baffle cylinder (13) and the first baffle cylinder (7); a plurality of catalyst grids (12) are arranged in the catalytic zone; A heat preservation zone is formed in the baffle cylinder (7), a high-temperature hydrothermal product discharge port (4) is provided at the top of the second-stage hydrothermal liquefaction chamber (10) corresponding to the heat preservation zone, and the high-temperature hydrothermal product discharge port (4) is connected to the high-temperature hydrothermal product feed port (3), a slag cleaning mechanism is provided in the first baffle cylinder (7), a second slag discharge port (16) is provided at the bottom end of the second-stage hydrothermal liquefaction chamber (10), and a first slag discharge port (14) is also provided on the outer side of the bottom of the second-stage hydrothermal liquefaction chamber (10).

2. A two-stage co-liquefaction mixing-reaction-filtration-heat recovery integrated device according to claim 1, characterized in that: A nozzle (28) is provided between a plurality of material feed ports and a medium feed port (30) and one end of the first-stage hydrothermal liquefaction reaction tube (20) at the top, wherein one end of the nozzle (28) is provided with a plurality of pipelines, and the plurality of pipelines are sequentially connected to the plurality of material feed ports and the medium feed port (30), and the other end of the nozzle (28) is a single pipeline, and the single pipeline is connected to one end of the first-stage hydrothermal liquefaction reaction tube (20); A receiving tube (27), a mixing tube (26) and a diffusion tube (31) are sequentially arranged between the single pipeline and one end of the first-stage hydrothermal liquefaction reaction tube (20), wherein the receiving tube (27), the mixing tube (26) and the diffusion tube (31) are all of a structure with different diameters.

3. The two-stage co-liquefaction mixing-reaction-filtration-heat recovery integrated device according to claim 1, characterized in that: Each first-stage hydrothermal liquefaction reaction tube (20) is provided with an inclination angle of 1-3°.

4. The two-stage co-liquefaction mixing-reaction-filtration-heat recovery integrated device according to claim 1, characterized in that: A high-temperature and high-pressure needle valve (23) is provided at one end of each first-stage hydrothermal liquefaction reaction tube (20) close to the medium-temperature hydrothermal transition product collection box (18) and between each first-stage hydrothermal liquefaction reaction tube (20).

5. The two-stage co-liquefaction mixing-reaction-filtration-heat recovery integrated device according to claim 1, characterized in that: An electric heating coil (8) is provided between the second thermal insulation layer (9) and the outer wall of the second-stage hydrothermal liquefaction generating chamber (10).

6. The two-stage co-liquefaction mixing-reaction-filtration-heat recovery integrated device according to claim 1, characterized in that: A filter screen (6) is provided on the top of the first baffle cylinder (7), and the slag cleaning mechanism extends into the first baffle cylinder (7) through the filter screen (6).

7. A two-stage co-liquefaction mixing-reaction-filtration-heat recovery integrated device according to claim 6, characterized in that: The slag cleaning mechanism comprises a motor (5), a rotating shaft, a slag scraping device (11) and a salt scraping device (15); one end of the rotating shaft is equipped with the motor (5), and the other end extends into the first baffle cylinder (7) through a filter screen (6); the slag scraping device (11) and the salt scraping device (15) are respectively equipped on the rotating shaft in the first baffle cylinder (7).

8. The two-stage co-liquefaction mixing-reaction-filtration-heat recovery integrated device according to claim 1, characterized in that: The first-stage hydrothermal liquefaction chamber (19) is provided with a microwave controller (21), and both the first-stage hydrothermal liquefaction chamber (19) and the second-stage hydrothermal liquefaction chamber (10) are provided with a plurality of microwave generators (24).

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