Supercritical water treatment device with microalgae carbon sequestration function and use method thereof

Abstract

The invention discloses a supercritical water treatment device with a microalgae carbon sequestration function and a use method of the supercritical water treatment device, and relates to the technical field of pollution treatment. Waste gas output by the supercritical water treatment system is introduced into the microalgae culture system for carbon sequestration, the pipeline type microalgae culture system is used for culturing microalgae, and magnetic force is used for controlling a cylindrical block to move in a pipeline so as to timely and effectively clean algae cells adhering to the wall; the supercritical water treatment device has the technical effects that the supercritical water treatment device can treat pollutants, can also perform carbon sequestration treatment on waste gas obtained through treatment, can automatically clean algae cells attached to the wall, and is simple to maintain and high in treatment efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of pollution treatment, and in particular to a supercritical water treatment device with microalgae carbon fixation function and a use method thereof. Background Art

[0002] With the rapid development of my country's economy and the substantial increase in population, many difficult-to-treat pollutants have been generated, such as sludge, organic matter and other types of slurries, which seriously endanger the ecological environment.

[0003] Domestic and foreign research and some industrial practices have proved that by utilizing the unique properties of supercritical water (referring to water in a special state with a temperature and pressure higher than 374.15℃ and 22.12MP respectively), the sludge organic matter completely dissolved in supercritical water undergoes a rapid and thorough homogeneous reaction with the oxidant. The carbon element in the organic matter is converted into carbon dioxide, most of the nitrogen element is converted into nitrogen gas, and elements such as chlorine, sulphur, and phosphorus are converted into corresponding inorganic salts, thereby achieving complete harmless treatment and resource utilization of the sludge.

[0004] The main component of the waste gas produced by the supercritical water treatment system is carbon dioxide, the main component of the waste water produced is some difficult-to-degrade organic matter, and the main component of the waste residue produced is metal salts. Microalgae have many advantages such as fast growth rate, strong carbon fixation ability, high photosynthesis efficiency, and high energy product yield. However, since their growth requires a large amount of nutrients and salts, their cultivation cost is high, which seriously restricts their large-scale application.

[0005] In the prior art, in order to meet the needs of carbon fixation and the cultivation of microalgae, a supercritical water treatment system is generally connected in series with a microalgae cultivation system, and the waste gas and wastewater obtained by the reaction of the supercritical water treatment system are used to cultivate microalgae (for example: a microalgae carbon fixation and energy utilization system and method for supercritical water treatment disclosed in a Chinese invention patent with patent number CN111235022B).

[0006] The devices mainly used in the microalgae cultivation system are open devices and closed devices; the open devices are mainly runway-type shallow water devices, curtain-type devices, etc. Although these devices have low investment costs, they are open, and the conditions for cultivating microalgae are uncontrollable and easily affected by weather, temperature, etc., which is not conducive to large-scale production and processing; the closed devices are mainly columnar devices, cube devices, spherical devices and pipeline devices; these devices can overcome the influence of external conditions, and can effectively control the scale, volume, specific surface area, and floor space, and can improve gas exchange and increase its utilization rate;

[0007] However, during the cultivation process, since microalgae are photoautotrophic organisms, they are very sensitive to parameters such as temperature, pH value, dissolved oxygen, culture medium concentration, and light intensity during their growth process. Due to competition for nutrients and light, cells form a serious wall adhesion phenomenon, which weakens the light reaching the inside of the reactor, thereby affecting the growth and reproduction of the internal algae cells. In order to ensure the growth and reproduction of algae cells, the closed microalgae cultivation system needs to be cleaned regularly, and the maintenance cost and complexity are both high, which affects the continuity of the treatment, and thus brings a series of troubles and constraints to the actual treatment and cultivation work.

[0008] Therefore, there is a need for a supercritical water treatment device that can treat pollutants and perform carbon fixation on the waste gas obtained after treatment, and can automatically clean the algae cells attached to the wall, with simple maintenance and high treatment efficiency and microalgae carbon fixation function. Summary of the invention

[0009] The embodiment of the present application provides a supercritical water treatment device with microalgae carbon fixation function, which solves the technical problems that the supercritical water treatment devices in the prior art do not have the carbon fixation function, require regular manual cleaning of the algae cells attached to the wall, are cumbersome and difficult to maintain, and affect the continuity of the treatment reaction and thus affect the treatment efficiency. The supercritical water treatment device can treat pollutants and then fix carbon on the waste gas obtained by the treatment, and can automatically clean the algae cells attached to the wall, with simple maintenance and high treatment efficiency.

[0010] The embodiment of the present application provides a supercritical water treatment device with microalgae carbon fixation function, including a microalgae cultivation system for cultivating microalgae using the reaction product of the supercritical water treatment system; the microalgae cultivation system includes a support frame, a horizontal containing column, a serpentine container tube, a liquid storage container, a serpentine guide rail, and an internal cleaning displacement plug;

[0011] An air inlet and an air outlet are arranged on the side wall of the horizontal receiving column, a winch structure is built in, and a vertical bottom connecting pipe is fixed at the bottom; the bottom of the bottom connecting pipe is connected to the internal space of the serpentine container tube, and a liquid inlet and a adding port are arranged on the side wall;

[0012] The winch structure is used to reel in and release the gas delivery hose, on which a side pump body is positioned. When the side pump body is in operation, it extracts the waste gas in the internal space of the horizontally placed receiving column, and transports it to the other end of the gas delivery hose and discharges it; the other end of the gas delivery hose is positioned on the inner cleaning shift plug;

[0013] The serpentine container tube is made of transparent material and is horizontally arranged. An end valve is provided at one end away from the horizontal receiving column, and the end is connected to a liquid storage container that serves as a pressure relief and temporary container.

[0014] The serpentine guide rail matches the shape of the serpentine container tube and is used for guiding the movement of the displacement magnet ring sleeved on the serpentine container tube;

[0015] The inner cleaning displacement plug slides in the serpentine container tube under the influence of magnetic force, playing the role of cleaning the tube wall, stirring the water body, increasing turbulence, assisting gas-liquid mixing, and promoting sufficient illumination. The main body is cylindrical, and a controlled expansion and contraction elastic ring is provided on the side wall; the elastic ring contacts the tube wall after expansion.

[0016] Furthermore, the liquid level in the serpentine container tube is no higher than four fifths of the height of the inner space thereof.

[0017] Further, the inner cleaning displacement plug comprises a base column, an inner adsorbent body and an outer sleeve ring;

[0018] The base column is a hard cylinder that slides flexibly in the serpentine container tube to play a role in bearing support; a side annular groove is provided on the outer side wall of the base column; the side annular groove is an annular groove used to limit the position of the outer ring;

[0019] The inner adsorbent is in a circular shape and made of ferromagnetic material. It is fixed inside the base column and is coaxial with the base column. When the displacement magnet ring moves, the inner adsorbent is driven to move by magnetic force.

[0020] The outer sleeve ring is a hollow rubber elastic ring, which is sleeved on the side annular groove and expands and contracts under the control of the control unit.

[0021] Preferably, an isolation ring is also fixed on the side wall of the base column;

[0022] The isolating ring is tubular and made of cloth; it is sleeved on the foundation column and covers the outer sleeve ring; both ends of the isolating ring are fixed on the side wall of the foundation column to contact the tube wall instead of the outer sleeve ring.

[0023] Preferably, the number of the serpentine container tubes is multiple and arranged in a row;

[0024] There are multiple gas delivery hoses and internal cleaning shift plugs in the horizontally placed accommodating column;

[0025] The internal cleaning displacement plug, the gas delivery hose and the serpentine container tube correspond one to one;

[0026] The number of the shifting magnet rings is also multiple, arranged in a row, fixed together and corresponding to the serpentine container tubes one by one;

[0027] All the serpentine container tubes are connected to the horizontal containing column through the bottom connecting tube, and are also connected to the liquid storage container;

[0028] The lengths of the bottom connecting pipes corresponding to different serpentine container pipes are different; when the hoisting structure rotates, all the gas hoses are released or reeled in at the same time.

[0029] Preferably, the base column is provided with a plurality of liquid-permeable channels;

[0030] The liquid permeable channel is a trumpet-shaped channel, and more turbulence will be generated after the fluid flows through the liquid permeable channel;

[0031] In cleaning mode, there is no need to open the end valve, which is more energy-efficient and can reduce the damage to microalgae caused by pumping.

[0032] Preferably, an inner conical tube is fixed on the liquid permeable channel; the inner conical tube is a conical tube body made of elastic rubber material, and both ends of the inner conical tube are respectively fixed on the edges of the liquid permeable channel, forming a closed space together with the inner wall of the liquid permeable channel, and the closed space is connected to the side pump body, and the inner conical tube expands and contracts under the control of the control unit; when the inner cleaning shift plug moves, the inner conical tube deforms regularly under the action of air pressure, thereby increasing turbulence and obtaining different water-gas mixing effects.

[0033] Preferably, the internal cleaning shift plug further comprises an end bearing ring, a shift bearing ring and a bearing column;

[0034] The end bearing ring is coaxial with the foundation column and fixed to one end of the foundation column;

[0035] The shift bearing ring and the bearing column are positioned at the other end of the foundation column, and both are coaxial with the foundation column;

[0036] The bearing column is an electric or pneumatic telescopic rod, one end of which is fixed on the end face of the base column; the displacement bearing ring is fixed on the bearing column through a hard rod body or a hard plate body;

[0037] The isolation ring is tubular and is composed of two sections of tubular bodies spliced ​​together, one section of the tubular body is made of elastic rubber, and the other section of the tubular body is made of cloth;

[0038] The two end edges of the isolation ring are respectively fixed to the edge of the end bearing ring and the edge of the displacement bearing ring;

[0039] When in use, the contact position between the isolation ring and the outer sleeve ring can be flexibly adjusted by extending and retracting the bearing column.

[0040] Preferably, the isolation ring is a tube formed by splicing and assembling multiple sections of tube bodies, at least one of the multiple sections of tube bodies is made of elastic rubber, and the materials of the other sections of the tube bodies can be different, and some sections of the tube bodies are mesh structures;

[0041] In the cleaning mode, the isolation ring can be controlled to move back and forth, thereby causing different sections of the tube to contact the tube wall of the serpentine container tube, thereby assisting the scrubbing process and obtaining different scrubbing effects.

[0042] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0043] By optimizing and improving the supercritical water treatment system and the microalgae cultivation system connected in series in the prior art, the waste gas output by the supercritical water treatment system is introduced into the microalgae cultivation system for carbon fixation, the microalgae are cultivated by the pipeline-type microalgae cultivation system, and the columnar blocks are controlled to move in the pipeline by magnetic force to timely and effectively clean the algae cells attached to the wall; the technical problems that the supercritical water treatment device in the prior art does not have the carbon fixation function, the algae cells attached to the wall need to be manually cleaned regularly, the maintenance is cumbersome and difficult, and the continuity of the treatment reaction and thus the treatment efficiency are affected are effectively solved, thereby achieving the technical effect that the supercritical water treatment device can treat the pollutants and then perform carbon fixation on the waste gas obtained by the treatment, and can automatically clean the algae cells attached to the wall, the maintenance is simple and the treatment efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0044] Figure 1 A simplified structural diagram of the microalgae cultivation system of the supercritical water treatment device with microalgae carbon fixation function of the present application;

[0045] Figure 2 This is a system diagram of a supercritical water treatment device that also has the function of microalgae carbon fixation;

[0046] Figure 3 It is a simplified structural diagram of the serpentine container tube;

[0047] Figure 4 It is a schematic diagram of the positional relationship between the serpentine container tube and the serpentine guide rail;

[0048] Figure 5 This is a simplified structural diagram of the internal cleaning shift plug;

[0049] Figure 6 It is a schematic diagram of the connection relationship between the side pump body and various components;

[0050] Figure 7 A schematic diagram of the positional relationship between a plurality of serpentine container tubes;

[0051] Figure 8 It is a schematic diagram of the positional relationship between multiple winch columns;

[0052] Fig. 9 A schematic diagram of the layout of the liquid permeable channels on the foundation column;

[0053] Fig.10 is a schematic diagram of the positional relationship between the liquid permeable channel and the inner conical tube thereon;

[0054] Fig.11 It is a schematic diagram of the positional relationship between the isolation ring and the foundation column;

[0055] Fig.12 A schematic diagram of the positional relationship among the shifting bearing ring, the bearing column and the isolation ring;

[0056] Fig.13 A schematic diagram of the positional relationship among the shift bearing ring, the bearing column and the isolation ring;

[0057] Fig.14 This is a simplified structural diagram of the isolation ring.

[0058] In the figure:

[0059] Illumination system 001, support frame 100, horizontal accommodating column 200, air inlet 201, winch structure 202, side pump body 203, air delivery hose 204, bottom connecting pipe 210, liquid inlet 211, addition port 212, serpentine container tube 300, end valve 310, liquid storage container 400, return pipeline 410, serpentine guide rail 500, carrier 510, shifting magnet ring 520, internal cleaning shifting plug 600, base column 610, side annular groove 611, liquid permeable channel 613, inner conical tube 614, inner adsorbent 620, outer ring 630, isolation ring 640, end outlet air column 650, end bearing ring 660, shifting bearing ring 670, bearing column 680. DETAILED DESCRIPTION

[0060] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the drawings show preferred embodiments of the present invention, but the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to enable a more thorough and comprehensive understanding of the disclosed content of the present invention.

[0061] It should be noted that the terms “vertical”, “horizontal”, “up”, “down”, “left”, “right” and similar expressions used in this document are only for illustrative purposes and do not represent the only implementation method.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0063] Embodiment 1

[0064] like Figure 2 As shown, the supercritical water treatment device with microalgae carbon fixation function of the present application includes a waste storage system, a supercritical water treatment system, a microalgae cultivation system, a lighting system 001 and a nutrient element supplementation system.

[0065] The waste storage system is used to store waste (pollutants) and provide supercritical water treatment raw materials for the supercritical water treatment system; the supercritical water treatment system uses the raw materials provided by the waste storage system to perform supercritical water treatment reactions; the microalgae cultivation system cooperates with the illumination system 001 to cultivate microalgae using the waste gas and wastewater obtained from the reaction of the supercritical water treatment system; the nutrient element supplementation system is connected to the microalgae cultivation system to provide nutrition for the cultivation of microalgae; the waste storage system, supercritical water treatment system, illumination system 001 and nutrient element supplementation system are all prior art and will not be described in detail here.

[0066] like Figure 1 As shown, the microalgae cultivation system includes a support frame 100, a horizontal containing column 200, a serpentine container tube 300, a liquid storage container 400, a serpentine guide rail 500, an internal cleaning displacement plug 600, a power assembly and a control unit.

[0067] The support frame 100 is in a plate-shaped, rod-shaped or frame-shaped structure, positioned on the ground, and serves to support other components of the microalgae cultivation system.

[0068] like Figure 1 , Figure 3 and Figure 4 As shown, the horizontal accommodating column 200 is a hollow column arranged horizontally, fixed on the support frame 100 near the top, and acts as a container; the side wall of the horizontal accommodating column 200 is provided with a gas inlet 201 for introducing waste gas and a gas outlet for discharging treated gas, and a bottom connecting pipe 210 is fixed at the bottom; the bottom connecting pipe 210 is a hard vertical pipe, the top of which is fixed to the bottom of the horizontal accommodating column 200 and communicated with the internal space of the horizontal accommodating column 200, and the bottom is fixed to the top of the serpentine container tube 300 near one end, and communicated with the internal space of the serpentine container tube 300; the side wall of the bottom connecting pipe 210 is provided with a liquid inlet 211 and an addition port 212; the liquid inlet 211 and the addition port 212 are both provided with valve bodies for limiting flow and controlling on and off, the liquid inlet 211 and the addition port 212 are respectively connected to the waste liquid outlet of the supercritical water treatment system and the nutrient element supplement system, and are respectively used to add waste liquid and nutrients required for culture into the bottom connecting pipe 210;

[0069] The horizontal containing column 200 has a built-in hoisting structure 202; the hoisting structure 202 is arranged horizontally, and the main body is in the shape of a reel, which is used to reel in and release the gas hose 204 under the control of the control unit; a side pump body 203 is positioned on the hoisting structure 202, and the side pump body 203 is an air pump, which is located on the side wall of the hoisting structure 202 and operates under the control of the control unit, and its gas inlet and gas outlet are respectively connected to the internal space of the horizontal containing column 200 and the gas hose 204; when the side pump body 203 is in operation, the waste gas in the internal space of the horizontal containing column 200 is extracted and transported to the other end of the gas hose 204; the gas hose 204 is a hose for transporting waste gas, one end of which is fixed on the hoisting structure 202 and connected to the side pump body 203 on the hoisting structure 202, and the other end is fixed on the inner cleaning shift plug 600.

[0070] Furthermore, in order to prevent the gas delivery hose 204 from being bent and affecting the delivery of gas, the gas delivery hose 204 is a hose with a spring-like steel wire built in.

[0071] The serpentine container tube 300 is used as a container for cultivating microalgae. It is made of transparent material and is serpentine (bow-shaped) as a whole. It is horizontally arranged and fixed on the support frame 100. One end close to the horizontal accommodation column 200 is connected to the horizontal accommodation column 200 through the bottom connecting tube 210. The other end of the serpentine container tube 300 is fixed with an end valve 310 for limiting the discharge of the fluid in the serpentine container tube 300. The end valve 310 is preferably a ball valve.

[0072] The water level in the serpentine container tube 300 is not higher than four fifths of the height of its internal space;

[0073] One end of the serpentine container tube 300 provided with an end valve 310 is connected to the liquid storage container 400; the volume of the liquid storage container 400 is more than 1.5 times the volume of the serpentine container tube 300, and the whole is a box structure, located below the serpentine container tube 300, and plays the role of pressure relief and temporary container; a discharge port is provided on the side wall of the liquid storage container 400.

[0074] A liquid pump is positioned in the liquid storage container 400 , and the liquid pump is connected to the liquid inlet 211 through a reflux pipeline 410 . Under the control of the control unit, the liquid in the liquid storage container 400 is pumped back to the liquid inlet 211 as needed.

[0075] The serpentine guide rail 500 is fixed on the support frame 100, located below the serpentine container tube 300, matching the shape of the serpentine container tube 300, and is used to guide the movement of the displacement magnet ring 520; a vehicle 510 is positioned on the serpentine guide rail 500, and the vehicle 510 moves along the serpentine guide rail 500 under the control of the control unit; the displacement magnet ring 520 is arranged longitudinally, and the top is fixed to the top of the vehicle 510;

[0076] The displacement magnet ring 520 is an annular magnet, which is sleeved on the serpentine container tube 300 and moves along the serpentine container tube 300, thereby driving the inner cleaning displacement plug 600 to move through its own magnetic force.

[0077] like Figure 5 and Figure 6 As shown, the inner cleaning displacement plug 600 slides in the serpentine container tube 300 under the influence of magnetic force, plays the role of cleaning the tube wall, stirring the water body, increasing turbulence, assisting gas-liquid mixing, and promoting sufficient illumination. The main body is cylindrical and includes a base column 610, an inner adsorbent 620 and an outer sleeve 630;

[0078] The base column 610 is a hard cylinder that slides flexibly in the serpentine container tube 300 to play a role of bearing support; a side annular groove 611 is provided on the outer wall of the base column 610; the side annular groove 611 is an annular groove used to limit the position of the outer ring 630;

[0079] The inner adsorbent 620 is annular and made of ferromagnetic material, fixed inside the base column 610 and coaxial with the base column 610; when the displacement magnet ring 520 moves, the inner adsorbent 620 is driven to move by magnetic force;

[0080] The side pump body 203 is provided with a distribution valve controlled by a control unit to distribute the gas into multiple paths; the outer ring 630 is a hollow rubber elastic ring, which is sleeved on the side annular groove 611 and is connected to the side pump body 203 through the distribution valve, and expands and contracts under the control of the control unit; the side wall of the outer ring 630 can contact the tube wall when expanded.

[0081] The horizontally placed containing column 200, the bottom connecting tube 210 and the serpentine container tube 300 will form a closed space when the valves are closed.

[0082] The other end of the air delivery hose 204 is fixed to a position near the center of the end of the base column 610, and bubbles or airflow are sprayed at a position close to the base column 610 to participate in the water-gas mixing.

[0083] Preferably, an independent air pump controls the expansion and contraction of the outer sleeve 630 using a clean gas.

[0084] Preferably, the outer sleeve 630 is composed of a plurality of strip-shaped capsules spliced ​​together, and the plurality of strip-shaped capsules expand and contract independently under the control of the control unit to obtain different spoiler effects.

[0085] The power assembly and the control unit are used to provide power for the operation of the various components of the microalgae cultivation system and control the coordinated operation of the various components, which will not be described in detail here.

[0086] Furthermore, an end outlet air column 650 is fixed to one or both ends of the base column 610; the end outlet air column 650 is a hard cylinder, coaxial with the base column 610, hollow inside and with closed small holes; the air supply hose 204 is connected to the end outlet air column 650, and the ejected air flow forms a large number of bubbles after flowing through the end outlet air column 650.

[0087] Furthermore, end outlet gas columns 650 are fixed at both ends of the base column 610; a valve body is provided at the end of the gas supply hose 204 close to the end outlet gas column 650, and the valve body divides the gas into one or both end outlet gas columns 650 under the control of the control unit; when the device of the present application is in operation, the gas outlet position can be adjusted as needed.

[0088] Preferably, in order to reduce the wear of the outer ring 630 and ensure the smoothness of its movement, an isolation ring 640 is also fixed on the side wall of the base column 610; the isolation ring 640 is tubular and made of cloth; it is put on the base column 610 and covers the outer ring 630; both ends of the isolation ring 640 are fixed on the side wall of the base column 610, replacing the outer ring 630 to resist the tube wall; when the outer ring 630 contracts, the isolation ring 640 shrinks, and when the outer ring 630 expands, the isolation ring 640 expands.

[0089] When the supercritical water treatment device with microalgae carbon fixation function of the embodiment of the present application is used:

[0090] 1. The supercritical water treatment system uses the raw materials provided by the waste storage system to perform supercritical water treatment reactions; the microalgae cultivation system cooperates with the illumination system 001 to cultivate microalgae using the waste gas and wastewater obtained by the supercritical water treatment system to achieve carbon fixation; the nutrient element supplement system is connected to the microalgae cultivation system to provide nutrients for the cultivation of microalgae;

[0091] 2. Fill the serpentine container tube 300 with waste liquid by injecting waste liquid into the liquid inlet 211, and at the same time fill it with nutrient elements required for cultivation through the addition port 212; keep the liquid level in the serpentine container tube 300 not higher than four-fifths of the height of its internal space;

[0092] 3. Pump the waste gas to be treated into the horizontal containing column 200 from the gas inlet 201;

[0093] 4. Control the movement of the carrier 510 and the winch structure 202 to release the gas hose 204, so that the displacement magnet ring 520 drives the inner cleaning displacement plug 600 to move while ensuring the gas supply of the inner cleaning displacement plug 600; during the movement of the inner cleaning displacement plug 600, the side pump body 203 continues to operate, and the waste gas is output from the position close to the base column 610 and mixed with the waste liquid;

[0094] 5. During the movement of the internal cleaning displacement plug 600, there are two modes, namely, cleaning mode and disturbance mode;

[0095] In the cleaning mode, the opening amount of the end valve 310 is greater than 1% and less than 4%, and the outer ring 630 expands as a whole and is close to the pipe wall. When close to the pipe wall, the inner cleaning displacement plug 600 is controlled to move to scrub the pipe wall (reciprocating scrubbing and one-way wiping can be selected); in this process, the untreated waste liquid in the liquid storage container 400 is pumped back to the serpentine container tube 300 through the return pipe 410;

[0096] In the turbulence mode, the end valve 310 is closed, the outer ring 630 expands and contracts regularly, the inner cleaning displacement plug 600 moves continuously in one direction or reciprocates, and the liquid in the serpentine container tube 300 flows through the gap between the outer ring 630 and the inner wall of the serpentine container tube 300, thereby increasing the turbulence of the liquid, improving the mixing effect of the water liquid, and improving the light absorption effect of the microalgae, thereby improving the overall treatment efficiency;

[0097] 6. When the medium in the supercritical water treatment device with microalgae carbon fixation function reaches the discharge requirement, the gas product is controlled to be discharged from the gas outlet; the solid and liquid products are discharged as a whole into the liquid storage container 400 and then cleared out.

[0098] Preferably, Figure 7 and Figure 8 As shown, in order to increase the processing capacity without significantly increasing the cost, the number of the serpentine container tubes 300 is multiple and arranged in a row; the gas hose 204 and the internal cleaning shift plug 600 in the horizontal receiving column 200 are both multiple; the internal cleaning shift plug 600 and the gas hose 204 correspond one-to-one to the serpentine container tubes 300; the number of the shift magnet rings 520 is also multiple and arranged in a row, fixed together and corresponding one-to-one to the serpentine container tubes 300; all the serpentine container tubes 300 are connected to the horizontal receiving column 200 through the bottom connecting tube 210, and are all connected to the liquid storage container 400; the lengths of the bottom connecting tubes 210 corresponding to different serpentine container tubes 300 are different; when the winch structure 202 rotates, all the gas hoses 204 are released or retracted at the same time.

[0099] Preferably, after the cleaning mode is implemented, the outer sleeve ring 630 can be controlled to expand and contract regularly to shake off the sticky debris.

[0100] The technical solutions in the above embodiments of the present application have at least the following technical effects or advantages:

[0101] The invention solves the technical problems that the supercritical water treatment device in the prior art does not have the carbon fixation function, requires regular manual cleaning of the algae cells attached to the wall, is cumbersome and difficult to maintain, and will affect the continuity of the treatment reaction and thus the treatment efficiency. The invention achieves the technical effect that the supercritical water treatment device can perform carbon fixation treatment on the waste gas obtained after treating the pollutants, can automatically clean the algae cells attached to the wall, has simple maintenance and high treatment efficiency, can realize the efficient capture of carbon dioxide and the harmless treatment of pollutants.

[0102] Embodiment 2

[0103] In order to further improve the water-gas mixing effect, increase the turbulence generated by the movement of the inner cleaning displacement plug 600 and thus improve the light energy absorption effect and the exhaust gas treatment efficiency, the embodiment of the present application optimizes and improves the structure of the base column 610 on the basis of the above embodiment, specifically:

[0104] like Fig. 9 and Fig.10 As shown, the base column 610 is provided with a plurality of liquid permeable channels 613; the liquid permeable channels 613 are trumpet-shaped channels, and more turbulence will be generated after the fluid flows through the liquid permeable channels 613; in the cleaning mode, there is no need to open the end valve 310, which is more energy-saving and can reduce the damage to the microalgae caused by pumping.

[0105] Preferably, an inner conical tube 614 is fixed on the liquid permeable channel 613; the inner conical tube 614 is a conical (trumpet-shaped) tube body made of elastic rubber material, and both ends are respectively fixed on the edges of the liquid permeable channel 613, and together with the inner wall of the liquid permeable channel 613, a closed space is formed, and the closed space is connected to the side pump body 203. The inner conical tube 614 expands and contracts under the control of the control unit; when the inner cleaning shift plug 600 moves, the inner conical tube 614 deforms regularly under the action of air pressure, thereby increasing turbulence and obtaining different water-gas mixing effects.

[0106] Preferably, an independent air pump controls the expansion and contraction of the inner conical tube 614 using clean gas.

[0107] Preferably, when the serpentine container tube 300 needs to be emptied once, the inner conical tube 614 can be first controlled to expand to close the liquid permeable channel 613 .

[0108] Embodiment 3

[0109] In order to further extend the maintenance interval of the device of the present application, increase the cleaning effect and improve the cleaning speed, the present application embodiment further optimizes and improves the structure of the internal cleaning displacement plug 600 on the basis of the above embodiment, specifically:

[0110] like Fig.11 , Fig.12 and Fig.13As shown, the internal cleaning displacement plug 600 further includes an end bearing ring 660, a displacement bearing ring 670 and a bearing column 680;

[0111] The end bearing ring 660 is a hard ring body, the diameter of which is more than 0.8 times the diameter of the end face of the foundation column 610, is coaxial with the foundation column 610, and is fixed at one end of the foundation column 610;

[0112] The displacement bearing ring 670 and the bearing column 680 are positioned at the other end of the base column 610, and both are coaxial with the base column 610; the displacement bearing ring 670 is a hard ring body, and the diameter is more than 0.8 times the diameter of the end face of the base column 610;

[0113] The bearing column 680 is an electric or pneumatic telescopic rod, one end of which is fixed to the end face of the base column 610; the displacement bearing ring 670 is fixed to the bearing column 680 through a hard rod body or a hard plate body, and moves closer to or away from the end face of the base column 610 as the bearing column 680 is extended or retracted;

[0114] The isolation ring 640 is tubular and is formed by splicing two tubes. One tube is made of elastic rubber and the other tube is made of cloth (natural fiber or chemical fiber), preferably polyester.

[0115] The two end edges of the isolation ring 640 are respectively fixed to the edge of the end bearing ring 660 and the edge of the displacement bearing ring 670;

[0116] When in use, the contact position between the isolation ring 640 and the outer ring 630 can be flexibly adjusted by extending and retracting the bearing column 680 .

[0117] Preferably, Fig.14 As shown, the isolation ring 640 is a tube formed by splicing together multiple sections of tube bodies, at least one of the multiple sections of the tube body is made of elastic rubber, and the materials of the other sections of the tube body can be different, and some sections of the tube body are mesh structures; in the cleaning mode, the isolation ring 640 can be controlled to move back and forth so as to cause different sections of the tube body to contact the tube wall of the serpentine container tube 300, thereby assisting the scrubbing and obtaining different scrubbing effects.

[0118] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A supercritical water treatment device with microalgae carbon fixation function, comprising a microalgae cultivation system for cultivating microalgae using the reaction product of the supercritical water treatment system; characterized in that: The microalgae cultivation system comprises a support frame (100), a horizontally placed containing column (200), a serpentine container tube (300), a liquid storage container (400), a serpentine guide rail (500), and an internal cleaning displacement plug (600); The side wall of the horizontally placed containing column (200) is provided with an air inlet (201) and an air outlet, a built-in winch structure (202), and a vertically arranged bottom connecting pipe (210) is fixed at the bottom; the bottom of the bottom connecting pipe (210) is communicated with the internal space of the serpentine container tube (300), and a liquid inlet (211) and a adding port (212) are provided on the side wall; The hoisting structure (202) is used to reel in and release the gas delivery hose (204), on which a side pump body (203) is positioned. When the side pump body (203) is in operation, it extracts waste gas in the internal space of the horizontally placed receiving column (200), transports it to the other end of the gas delivery hose (204) and discharges it; the other end of the gas delivery hose (204) is positioned on the inner cleaning displacement plug (600); The serpentine container tube (300) is made of a transparent material and is horizontally arranged. An end valve (310) is provided at one end away from the horizontally arranged receiving column (200). The end is connected to a liquid storage container (400) that serves as a pressure relief and temporary container. The serpentine guide rail (500) matches the shape of the serpentine container tube (300) and is used to guide the movement of the displacement magnet ring (520) sleeved on the serpentine container tube (300); The inner cleaning displacement plug (600) slides in the serpentine container tube (300) under the influence of magnetic force, playing the role of cleaning the tube wall, stirring the water body, increasing turbulence, assisting gas-liquid mixing, and promoting sufficient illumination. The main body is cylindrical, and a controlled expansion and contraction elastic ring is provided on the side wall; the elastic ring contacts the tube wall after expansion.

2. The supercritical water treatment device with microalgae carbon fixation function as claimed in claim 1, characterized in that: The liquid level in the serpentine container tube (300) is no higher than four fifths of the height of its internal space.

3. The supercritical water treatment device with microalgae carbon fixation function as claimed in claim 1, characterized in that: The inner cleaning displacement plug (600) comprises a base column (610), an inner adsorption body (620) and an outer sleeve ring (630); The base column (610) is a hard cylinder that slides flexibly in the serpentine container tube (300) to play a role of load bearing and support; a side annular groove (611) is provided on the outer side wall of the base column (610); the side annular groove (611) is an annular groove used to limit the position of the outer ring (630); The inner adsorption body (620) is in the shape of a ring and made of ferromagnetic material, and is fixed inside the base column (610) and is coaxial with the base column (610); When the displacement magnet ring (520) moves, the inner adsorption body (620) is driven to move by magnetic force; The outer sleeve ring (630) is a hollow rubber elastic ring, which is sleeved on the side annular groove (611) and expands and contracts under the control of the control unit.

4. The supercritical water treatment device with microalgae carbon fixation function as claimed in claim 3, characterized in that: An isolation ring (640) is also fixed on the side wall of the base column (610); The isolation ring (640) is tubular and made of cloth. It is sleeved on the base column (610) and covers the outer ring (630). Both ends of the isolation ring (640) are fixed on the side wall of the base column (610) to contact the tube wall instead of the outer ring (630).

5. The supercritical water treatment device with microalgae carbon fixation function as claimed in claim 1, characterized in that: The number of the serpentine container tubes (300) is multiple and arranged in a row; There are multiple gas delivery hoses (204) and internal cleaning displacement plugs (600) in the horizontally placed accommodation column (200); The inner cleaning displacement plug (600), the gas delivery hose (204) and the serpentine container tube (300) correspond one to one; The number of the displacement magnet rings (520) is also multiple, arranged in a row, fixed together and corresponding one to one with the serpentine container tubes (300); All the serpentine container tubes (300) are connected to the horizontally placed containing column (200) through the bottom connecting tube (210), and are also connected to the liquid storage container (400); The bottom connecting pipes (210) corresponding to different serpentine container tubes (300) have different lengths; when the hoisting structure (202) rotates, all the gas delivery hoses (204) are released or retracted at the same time.

6. The supercritical water treatment device with microalgae carbon fixation function as claimed in claim 4, characterized in that: The base column (610) is provided with a plurality of liquid-permeable channels (613); The liquid permeable channel (613) is a trumpet-shaped channel, and a large amount of turbulence will be generated after the fluid flows through the liquid permeable channel (613); In the cleaning mode, there is no need to open the end valve (310), which is more energy-efficient and can reduce the damage to the microalgae caused by pumping.

7. The supercritical water treatment device with microalgae carbon fixation function as claimed in claim 6, characterized in that: An inner conical tube (614) is fixed on the liquid permeable channel (613); the inner conical tube (614) is a conical tube body made of elastic rubber material, and its two ends are respectively fixed on the edges of the liquid permeable channel (613), and together with the inner wall of the liquid permeable channel (613), a closed space is formed, and the closed space is connected to the side pump body (203). The inner conical tube (614) expands and contracts under the control of the control unit; when the inner cleaning displacement plug (600) moves, the inner conical tube (614) deforms regularly under the action of air pressure, thereby increasing turbulence and obtaining different water-gas mixing effects.

8. The supercritical water treatment device with microalgae carbon fixation function according to any one of claims 4 to 6, characterized in that: The inner cleaning displacement plug (600) further comprises an end bearing ring (660), a displacement bearing ring (670) and a bearing column (680); The end bearing ring (660) is coaxial with the base column (610) and fixed to one end of the base column (610); The displacement bearing ring (670) and the bearing column (680) are positioned at the other end of the base column (610), and both are coaxial with the base column (610); the bearing column (680) is an electric or pneumatic telescopic rod, one end of which is fixed on the end surface of the base column (610); the displacement bearing ring (670) is fixed on the bearing column (680) through a hard rod body or a hard plate body; The isolation ring (640) is in a tubular shape and is formed by splicing two sections of tubular bodies, one section of the tubular body is made of elastic rubber, and the other section of the tubular body is made of cloth; The two end edges of the isolation ring (640) are respectively fixed to the edge of the end bearing ring (660) and the edge of the displacement bearing ring (670); when in use, the contact position between the isolation ring (640) and the outer ring (630) can be flexibly adjusted by telescoping the bearing column (680).

9. The supercritical water treatment device with microalgae carbon fixation function as claimed in claim 8, characterized in that: The isolation ring (640) is a tube formed by splicing together multiple sections of tube bodies, at least one of the multiple sections of tube bodies is made of elastic rubber, and the materials of the other sections of the tube bodies can be different, and some sections of the tube bodies are mesh structures; In the cleaning mode, the isolation ring (640) can be controlled to move back and forth, thereby causing different sections of the tube to contact the tube wall of the serpentine container tube (300), thereby assisting the scrubbing process and obtaining different scrubbing effects.

10. A method for using a supercritical water treatment device with microalgae carbon fixation function, characterized in that: The supercritical water treatment device with microalgae carbon fixation function as claimed in claim 1 comprises the following steps: Step 1: The supercritical water treatment system performs a supercritical water treatment reaction using raw materials provided by the waste storage system; Step 2: Fill the serpentine container tube (300) with waste liquid by injecting waste liquid into the liquid inlet (211), and at the same time fill it with nutrient elements required for cultivation through the addition port (212); keep the liquid level in the serpentine container tube (300) not higher than four fifths of the height of its internal space; Step 3: Pumping the waste gas to be treated into the horizontal containing column (200) from the gas inlet (201); Step 4: Control the vehicle (510) to move and simultaneously control the winch structure (202) to release the gas hose (204), so as to prompt the displacement magnet ring (520) to drive the inner cleaning displacement plug (600) to move while ensuring the gas supply of the inner cleaning displacement plug (600); during the movement of the inner cleaning displacement plug (600), the side pump body (203) continues to operate, and the waste gas is output from a position close to the base column (610) and mixed with the waste liquid; Step 5: During the movement of the internal cleaning displacement plug (600), there are two modes, namely, a cleaning mode and a turbulent flow mode; in the cleaning mode, the opening amount of the end valve (310) is greater than 1% and less than 4%, and the outer ring (630) expands as a whole to fit closely to the pipe wall. When in close contact, the internal cleaning displacement plug (600) is controlled to move to scrub the pipe wall; In the turbulence mode, the end valve (310) is closed, the outer ring (630) expands and contracts regularly, the inner cleaning displacement plug (600) moves continuously in one direction or reciprocates, and the liquid in the serpentine container tube (300) flows through the gap between the outer ring (630) and the inner wall of the serpentine container tube (300), thereby increasing the turbulence of the liquid; Step 6: When the medium in the supercritical water treatment device with microalgae carbon fixation function reaches the discharge requirement, the gas product is controlled to be discharged from the gas outlet; the solid and liquid products are discharged as a whole into the liquid storage container (400) and then cleared out.

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