A supercritical water treatment device with microalgae carbon fixation function and its usage method

Abstract

The present application discloses a supercritical water treatment device with a microalgae carbon fixation function and its usage method, which relates to the technical field of pollution treatment. In this application, the supercritical water treatment system and the microalgae cultivation system in series in the prior art are optimized and improved. The waste gas output from the supercritical water treatment system is introduced into the microalgae cultivation system for carbon fixation. The pipeline-type microalgae cultivation system is used to cultivate microalgae, and a magnetic force is used to control the movement of a columnar block in the pipeline to clean the adherent algal cells in a timely and effective manner; it realizes the technical effect that the supercritical water treatment device can not only treat pollutants but also carry out carbon fixation treatment on the waste gas obtained after treatment, and can automatically clean the adherent algal cells, with simple maintenance and high treatment efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of pollution treatment, and particularly to a supercritical water treatment device with a microalgae carbon fixation function and a method for using the same. Background Art

[0002] Research at home and abroad and some industrial practices have proved that by utilizing the unique properties of supercritical water (referring to water in a special state where the temperature and pressure are respectively higher than 374.15 °C and 22.12 MPa), 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, the vast majority of the nitrogen element is converted into nitrogen gas, and elements such as chlorine, sulfur, and phosphorus are converted into corresponding inorganic salts, realizing the complete harmless treatment and resource utilization of sludge.

[0003] The main component of the waste gas generated by the supercritical water treatment system is carbon dioxide, the main component of the wastewater generated is some refractory organic matters, and the main component of the waste residue generated is metal salts; while microalgae have many advantages such as fast growth rate, strong carbon fixation ability, high photosynthesis efficiency, and high energy product yield. However, due to its growth requiring a large amount of nutrients and salts, its cultivation cost is high, seriously restricting its large-scale application.

[0004] In the prior art, for the need of carbon fixation and the cultivation of microalgae, generally, the supercritical water treatment system and the microalgae cultivation system are connected in series, and the waste gas and wastewater obtained from the reaction of the supercritical water treatment system are used for the cultivation of microalgae (for example: the microalgae carbon fixation and energy utilization system and method disclosed in the Chinese invention patent with the authorization announcement number CN111235022B).

[0005] The devices mainly used in the microalgae cultivation system are open devices and closed devices; the open devices are mainly runway-type shallow water layer devices, curtain-type devices, etc. Although these devices have low input costs, due to being open, the conditions for cultivating microalgae cannot be controlled, and they are easily affected by weather, temperature, etc., which is not conducive to large-scale production and treatment; the closed devices are mainly columnar devices, cubic devices, spherical devices, and pipeline devices; these devices can overcome the influence of external conditions, and the scale, volume, specific surface area, and floor area can be effectively controlled, and gas exchange can be improved, increasing its utilization rate;

[0006] However, during the cultivation process, since microalgae are photoautotrophic organisms, they are very sensitive to parameters such as temperature, pH value, dissolved oxygen, medium concentration, and light intensity during growth. Due to competition for nutrients and light among cells, a serious cell adhesion phenomenon occurs. After adhesion, the light reaching the inside of the reactor is weakened, which in turn affects the growth and reproduction of the internal algal cells. To ensure the growth and reproduction of algal cells, the closed microalgae cultivation system needs to be cleaned regularly. The maintenance cost and complexity are relatively high, affecting the continuity of treatment, and thus bringing a series of troubles and constraints to the actual treatment and cultivation work.

[0007] Therefore, there is a need for a supercritical water treatment device with a microalgae carbon fixation function that can perform carbon fixation on the exhaust gas obtained after treating pollutants, and can automatically clean the adhered algal cells, with simple maintenance and high treatment efficiency. Summary of the Invention

[0008] By providing a supercritical water treatment device with a microalgae carbon fixation function in an embodiment of the present application, the technical problems in the prior art that the supercritical water treatment device does not have a carbon fixation function, requires manual cleaning of the adhered algal cells regularly, has cumbersome and difficult maintenance, and affects the continuity of the treatment reaction and thus the treatment efficiency are solved. The technical effects that the supercritical water treatment device can perform carbon fixation on the exhaust gas obtained after treating pollutants, and can automatically clean the adhered algal cells, with simple maintenance and high treatment efficiency are achieved.

[0009] An embodiment of the present application provides a supercritical water treatment device with a microalgae carbon fixation function, including a microalgae cultivation system for cultivating microalgae with the reaction products of the supercritical water treatment system; the microalgae cultivation system includes a support frame body, a horizontally placed accommodation column, a serpentine container tube, a liquid storage container, a serpentine guide rail, and an internal cleaning displacement plug.

[0010] An air inlet and an air outlet are provided on the side wall of the horizontally placed accommodation column, and a hoisting structure is built inside. A vertically arranged bottom connection pipe is fixed at the bottom; the bottom of the bottom connection pipe is communicated with the internal space of the serpentine container tube, and a liquid inlet and an addition port are provided on the side wall.

[0011] The hoisting structure is used for winding and releasing an air delivery hose, and a side pump body is positioned thereon. When the side pump body operates, it extracts the exhaust gas in the internal space of the horizontally placed accommodation column, transports it to the other end of the air delivery hose and discharges it; the other end of the air delivery hose is positioned on the internal cleaning displacement plug.

[0012] The serpentine container tube is made of a transparent material and is horizontally arranged. An end valve is provided at one end far from the horizontally placed accommodation column, and this end is communicated with the liquid storage container that serves as a pressure relief and temporary container.

[0013] The serpentine guide rail matches the shape of the serpentine container tube and is used to guide the movement of the displacement magnet ring sleeved on the serpentine container tube.

[0014] The inner cleaning displacement plug slides within the serpentine container tube under the influence of magnetism, serving to clean the tube wall, agitate the water body, increase turbulence, assist in gas-liquid mixing, and promote the full progress of light. The main body is cylindrical, and an elastic ring with controlled expansion and contraction is provided on the side wall; the elastic ring expands and abuts against the tube wall after expansion.

[0015] Furthermore, the liquid level in the serpentine container tube is not higher than four-fifths of the height of its internal space.

[0016] Furthermore, the inner cleaning displacement plug includes a base column, an inner adsorbent body, and an outer sleeve ring;

[0017] The base column is a rigid cylinder, which slides flexibly within the serpentine container tube and serves to carry and support; a side annular groove is provided on the outer side wall of the base column; the side annular groove is an annular groove for restricting the position of the outer sleeve ring;

[0018] The inner adsorbent body is circular ring-shaped, made of ferromagnetic material, and is fixed inside the base column and coaxial with the base column; when the displacement magnet ring moves, the inner adsorbent body is driven to move through magnetism;

[0019] 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.

[0020] Preferably, an isolation ring is also fixed on the side wall of the base column;

[0021] The isolation ring is tube-shaped and made of cloth; it is sleeved on the base column and covers the outer sleeve ring; both ends of the isolation ring are fixed on the side wall of the base column to replace the outer sleeve ring to abut against the tube wall.

[0022] Preferably, the number of the serpentine container tubes is multiple and arranged in a row;

[0023] The gas transmission hoses and inner cleaning displacement plugs in the horizontally placed accommodation column are both multiple;

[0024] The inner cleaning displacement plugs, gas transmission hoses correspond to the serpentine container tubes one by one;

[0025] The number of the displacement magnet rings is also multiple, arranged in a row, fixed together and corresponding to the serpentine container tubes one by one;

[0026] All the serpentine container tubes are connected to the horizontally placed accommodation column through bottom connection tubes and are also connected to the liquid storage container;

[0027] The lengths of the bottom connection tubes corresponding to different serpentine container tubes are different; when the hoisting structure rotates, all the gas transmission hoses are simultaneously released or retracted.

[0028] Preferably, a plurality of liquid permeation channels are provided on the base column;

[0029] The liquid permeation channel is a flared channel, and when the fluid flows through the liquid permeation channel, more turbulent flows will be generated;

[0030] In the cleaning mode, there is no need to open the end valve, which is more energy-saving and can reduce the damage to microalgae caused by pumping.

[0031] Preferably, an inner conical tube is fixed on the liquid permeation channel; the inner conical tube is a conical tube body made of elastic rubber, and the two ends are respectively fixed on the edge of the liquid permeation channel, forming a closed space together with the inner wall of the liquid permeation channel. This closed space is communicated with the side pump body, and the inner conical tube expands and contracts under the control of the control unit; when the inner cleaning displacement plug moves, the inner conical tube deforms regularly under the action of air pressure, thereby increasing the turbulent flow and obtaining different water-gas mixing effects.

[0032] Preferably, the inner cleaning displacement plug further includes an end bearing ring, a displacement bearing ring and a bearing column;

[0033] The end bearing ring is coaxial with the base column and is fixed at one end of the base column;

[0034] The displacement bearing ring and the bearing column are positioned at the other end of the base column, and both are coaxial with the base column;

[0035] The bearing column is an electric or pneumatic telescopic rod, and one end is fixed on the end face of the base column; the displacement bearing ring is fixed on the bearing column through a rigid rod body or a rigid plate body;

[0036] The isolation ring is tubular and is composed of two spliced tube bodies. One tube body is made of elastic rubber, and the other tube body is made of cloth;

[0037] The two ends of the isolation ring are respectively fixed on the edge of the end bearing ring and the edge of the displacement bearing ring;

[0038] During use, the contact position between the isolation ring and the outer sleeve ring can be flexibly adjusted by the telescopic movement of the bearing column.

[0039] Preferably, the isolation ring is a tube composed of multiple spliced tube bodies. At least one of the multiple tube bodies is made of elastic rubber, the materials of the other tube bodies can be different, and some tube bodies are of a mesh structure;

[0040] In the cleaning mode, the isolation ring can be controlled to move reciprocally, so that different tube bodies contact the inner wall of the snake-shaped container tube, thereby assisting the scrubbing process and obtaining different scrubbing effects.

[0041] One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0042] By optimizing and improving the supercritical water treatment system and microalgae cultivation system in series in the prior art, the waste gas output from the supercritical water treatment system is introduced into the microalgae cultivation system for carbon fixation. The microalgae are cultivated using a pipeline-type microalgae cultivation system, and the magnetic force is used to control the movement of the cylindrical block in the pipeline to clean the adherent algal cells in a timely and effective manner; effectively solving the technical problems in the prior art that the supercritical water treatment device does not have a carbon fixation function, requires manual cleaning of the adherent algal cells regularly, is cumbersome and difficult to maintain, and will affect the continuity of the treatment reaction and thus the treatment efficiency. Furthermore, it realizes the technical effect that the supercritical water treatment device can carry out carbon fixation treatment on the waste gas obtained after pollutant treatment, and can automatically clean the adherent algal cells, is simple to maintain and has high treatment efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Figure 1 It is a schematic structural diagram of the microalgae cultivation system of the supercritical water treatment device with the function of microalgae carbon fixation in this application;

[0044] Figure 2 It is a system diagram of the supercritical water treatment device with the function of microalgae carbon fixation;

[0045] Figure 3 It is a schematic structural diagram of the snake-shaped container tube;

[0046] Figure 4 It is a schematic diagram of the positional relationship between the snake-shaped container tube and the snake-shaped guide rail;

[0047] Figure 5 It is a schematic structural diagram of the internal cleaning displacement plug;

[0048] Figure 6 It is a schematic diagram of the connection relationship between the side pump body and each component;

[0049] Figure 7 It is a schematic diagram of the positional relationship between multiple snake-shaped container tubes;

[0050] Figure 8 It is a schematic diagram of the positional relationship between multiple hoisting columns;

[0051] Figure 9 It is a schematic diagram of the layout relationship of the liquid permeation channels on the base column;

[0052] Figure 10 It is a schematic diagram of the positional relationship between the liquid permeation channel and the inner conical tube thereon;

[0053] Figure 11 It is a schematic diagram of the positional relationship between the isolation ring and the base column;

[0054] Figure 12 It is a schematic diagram of the positional relationship between the displacement bearing ring, the bearing column and the isolation ring;

[0055] Figure 13 It is a schematic diagram of the positional relationship among the displacement bearing ring, the bearing column and the isolation ring;

[0056] Figure 14 It is a schematic diagram of the structure of the isolation ring.

[0057] In the figure:

[0058] Lighting system 001, support frame 100, horizontally placed receiving column 200, air inlet 201, hoisting structure 202, side pump body 203, gas transmission hose 204, bottom connecting pipe 210, liquid inlet 211, addition port 212, serpentine container pipe 300, end valve 310, liquid storage container 400, return pipeline 410, serpentine guide rail 500, carrier vehicle 510, displacement magnet ring 520, internal cleaning displacement plug 600, foundation column 610, side annular groove 611, liquid permeation channel 613, internal conical pipe 614, internal adsorbent 620, outer sleeve ring 630, isolation ring 640, end air outlet column 650, end bearing ring 660, displacement bearing ring 670, bearing column 680. Detailed implementation manners

[0059] To facilitate the understanding of the present invention, the present application will be described more comprehensively below with reference to the relevant drawings; the preferred embodiments of the present invention are shown in the drawings. However, the present invention can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, these embodiments are provided to make the disclosure of the present invention more thorough and comprehensive.

[0060] It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only embodiments.

[0061] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present invention belongs; the terms used in the description of the present invention in this specification 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 of the related listed items.

[0062] Embodiment 1

[0063] As Figure 2 shown, the supercritical water treatment device with the function of microalgae carbon fixation 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 supplement system.

[0064] The waste storage system is used to store waste (pollutants) and provide raw materials for supercritical water treatment system for supercritical water treatment; the supercritical water treatment system carries out supercritical water treatment reaction with the raw materials provided by the waste storage system; the microalgae cultivation system cooperates with the lighting system 001 to cultivate microalgae with the waste gas and waste water obtained from the reaction of the supercritical water treatment system; the nutrient supplement system is connected with the microalgae cultivation system and is used to provide nutrients for the cultivation of microalgae; the waste storage system, the supercritical water treatment system, the lighting system 001 and the nutrient supplement system are all prior arts and will not be elaborated here.

[0065] As Figure 1 shown, the microalgae cultivation system includes a support frame 100, a horizontally placed receiving 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.

[0066] The support frame 100 is in the shape of a plate, rod or frame, positioned on the ground and serves to carry other components of the microalgae cultivation system.

[0067] As Figure 1 、 Figure 3 and Figure 4 shown, the horizontally placed receiving column 200 is a horizontally placed hollow cylindrical shape, fixed at a position near the top of the support frame 100 and serves as a container; an air inlet 201 for introducing waste gas and an air outlet for discharging the treated gas are provided on the side wall of the horizontally placed receiving column 200, and a bottom connection pipe 210 is fixed at the bottom; the bottom connection pipe 210 is a rigid vertical pipe, the top of which is fixed at the bottom of the horizontally placed receiving column 200 and communicates with the internal space of the horizontally placed receiving column 200, and the bottom is fixed at a position near one end of the top of the serpentine container tube 300 and communicates with the internal space of the serpentine container tube 300; a liquid inlet 211 and an addition port 212 are provided on the side wall of the bottom connection pipe 210; valves for restricting flow rate and controlling on / off are provided on both the liquid inlet 211 and the addition port 212, and the liquid inlet 211 and the addition port 212 are respectively connected with the waste liquid outlet of the supercritical water treatment system and the nutrient supplement system, and are respectively used to add waste liquid and nutrients required for cultivation into the interior of the bottom connection pipe 210;

[0068] The horizontally arranged receiving column 200 is internally provided with a hoisting structure 202; the hoisting structure 202 is horizontally arranged, with a main body in the shape of a drum, and is used for winding and releasing the gas transmission hose 204 under the control of the control unit; a side pump body 203 is positioned on the hoisting structure 202. The side pump body 203 is an air pump, located on the side wall of the hoisting structure 202, and operates under the control of the control unit. Its gas inlet and gas outlet are respectively communicated with the internal space of the horizontally arranged receiving column 200 and the gas transmission hose 204; when the side pump body 203 operates, it extracts the waste gas in the internal space of the horizontally arranged receiving column 200 and transports it to the other end of the gas transmission hose 204; the gas transmission hose 204 is a hose for transporting waste gas, one end is fixed on the hoisting structure 202 and is communicated with the side pump body 203 on the hoisting structure 202, and the other end is fixed on the internal cleaning displacement plug 600.

[0069] Further, in order to prevent the gas transmission hose 204 from being bent and affecting the gas transmission, the gas transmission hose 204 is a hose with a spring-shaped steel wire inside.

[0070] The serpentine container tube 300 is used as a container for microalgae cultivation. It is made of a transparent material, is overall serpentine (bow-shaped), is horizontally arranged, is fixed on the support frame 100, and is communicated with the horizontally arranged receiving column 200 through a bottom connection pipe 210 at one end close to the horizontally arranged receiving column 200; an end valve 310 for restricting the discharge of the fluid in the serpentine container tube 300 is fixed at the other end of the serpentine container tube 300; the end valve 310 is preferably a ball valve;

[0071] The water level in the serpentine container tube 300 is not higher than four-fifths of the height of its internal space;

[0072] The end of the serpentine container tube 300 provided with the end valve 310 is communicated with 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. The whole is a box structure, located below the serpentine container tube 300, and serves as a pressure relief and temporary container; a discharge port is provided on the side wall of the liquid storage container 400.

[0073] A liquid pump is positioned in the liquid storage container 400. The liquid pump is communicated with the liquid inlet 211 through a return pipeline 410, and pumps the liquid in the liquid storage container 400 back to the liquid inlet 211 as needed under the control of the control unit.

[0074] The serpentine guide rail 500 is fixed on the support frame 100, located below the serpentine container tube 300, and is matched with the shape of the serpentine container tube 300, and is used for guiding the movement of the displacement magnet ring 520; a carrier vehicle 510 is positioned on the serpentine guide rail 500. The carrier vehicle 510 moves along the serpentine guide rail 500 under the control of the control unit; the displacement magnet ring 520 is longitudinally arranged, and the top is fixed on the top of the carrier vehicle 510;

[0075] The shifting magnet ring 520 is an annular magnet that is sleeved on the serpentine container tube 300 and moves along the serpentine container tube 300, thereby driving the inner cleaning shifting plug 600 to move through its own magnetic force.

[0076] As Figure 5 and Figure 6 shown, the inner cleaning shifting plug 600 slides inside the serpentine container tube 300 under the influence of magnetic force, playing a role in cleaning the tube wall, agitating the water body, increasing the turbulence, assisting in gas-liquid mixing, and promoting the full progress of light illumination. The main body is cylindrical and includes a base column 610, an inner adsorbent 620, and an outer sleeve ring 630;

[0077] The base column 610 is a rigid cylinder that slides flexibly inside the serpentine container tube 300, playing a role in bearing and supporting; 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 for restricting the position of the outer sleeve ring 630;

[0078] The inner adsorbent 620 is circular ring-shaped and made of ferromagnetic material, fixed inside the base column 610 and coaxial with the base column 610; when the shifting magnet ring 520 moves, it drives the inner adsorbent 620 to move through magnetic force;

[0079] A distribution valve controlled by the control unit is positioned on the side pump body 203 to distribute the gas to multiple paths; the outer sleeve ring 630 is a hollow rubber elastic ring that 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 sleeve ring 630 can contact the tube wall when it expands.

[0080] The horizontally placed accommodation column 200, the bottom connection pipe 210, and the serpentine container tube 300 will form a closed space when all the valves are closed.

[0081] The other end of the gas transmission hose 204 is fixed at a position near the center of the end of the base column 610, and bubbles or air flow are ejected near the base column 610 to participate in the water-gas mixing.

[0082] Preferably, an independent air pump is used to control the expansion and contraction of the outer sleeve ring 630 with cleaning gas.

[0083] Preferably, the outer sleeve ring 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 turbulence effects.

[0084] The power assembly and the control unit are respectively used to provide power for the operation of each component of the microalgae culture system and control the coordinated operation of each component, which will not be elaborated here.

[0085] 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.

[0086] 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.

[0087] 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 stretches.

[0088] When the supercritical water treatment device with microalgae carbon fixation function of the embodiment of the present application is used:

[0089] 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;

[0090] 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;

[0091] 3. Pump the waste gas to be treated into the horizontal receiving column 200 from the gas inlet 201;

[0092] 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;

[0093] 5. During the movement of the internal cleaning displacement plug 600, there are two modes, namely the cleaning mode and the turbulence mode;

[0094] In the cleaning mode, the opening amount of the end valve 310 is greater than 1% and less than 4%. The outer sleeve ring 630 expands as a whole and tightly adheres to the pipe wall. When it adheres tightly, the movement of the internal cleaning displacement plug 600 is controlled to scrub the pipe wall (reciprocating scrubbing and one-way wiping can be selected); during this process, the unprocessed waste liquid in the liquid storage container 400 is pumped back to the serpentine container pipe 300 through the reflux pipeline 410;

[0095] In the turbulence mode, the end valve 310 is closed, the outer sleeve ring 630 expands and contracts regularly, the internal cleaning displacement plug 600 moves continuously in one direction or reciprocates, and the liquid in the serpentine container pipe 300 flows through the gap between the outer sleeve ring 630 and the inner wall of the serpentine container pipe 300, increasing the liquid turbulence, improving the water-liquid mixing effect, improving the effect of microalgae absorbing light, and thus improving the overall treatment efficiency;

[0096] 6. When the medium in the supercritical water treatment device with the function of microalgae carbon fixation meets the discharge requirements, the gas product is controlled to be discharged from the gas outlet; the solid and liquid products are discharged into the liquid storage container 400 as a whole and then cleared out.

[0097] Preferably, as Figure 7 and Figure 8 shown, in order to increase the processing capacity on the premise of not significantly increasing the cost, the number of the serpentine container pipes 300 is multiple and arranged in a row; the gas transmission hoses 204 and the internal cleaning displacement plugs 600 in the horizontally placed accommodation column 200 are both multiple; the internal cleaning displacement plugs 600, the gas transmission hoses 204 and the serpentine container pipes 300 are in one-to-one correspondence; the number of the displacement magnet rings 520 is also multiple and arranged in a row, fixed together and in one-to-one correspondence with the serpentine container pipes 300; all the serpentine container pipes 300 are connected to the horizontally placed accommodation column 200 through the bottom connecting pipes 210 and are also connected to the liquid storage container 400; the lengths of the bottom connecting pipes 210 corresponding to different serpentine container pipes 300 are different; when the winding structure 202 rotates, all the gas transmission hoses 204 are released or wound up simultaneously.

[0098] Preferably, after the cleaning mode is carried out, the outer sleeve ring 630 can be controlled to expand and contract regularly to shake off the adhered sundries.

[0099] The technical solutions in the embodiments of the present application at least have the following technical effects or advantages:

[0100] The technical problems in the prior art that the supercritical water treatment device does not have a carbon sequestration function, requires manual cleaning of the adherent algal cells regularly, is cumbersome and difficult to maintain, and will affect the continuity of the treatment reaction and thus the treatment efficiency are solved. The technical effect is achieved that the supercritical water treatment device can carry out carbon sequestration treatment on the exhaust gas obtained after pollutant treatment, can automatically clean the adherent algal cells, is simple to maintain, has high treatment efficiency, can achieve efficient capture of carbon dioxide and harmless treatment of pollutants.

[0101] Example Two

[0102] 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, in this embodiment of the application, on the basis of the above embodiment, the structure of the base column 610 is optimized and improved. Specifically:

[0103] As Figure 9 and Figure 10 shown, a plurality of liquid-permeable channels 613 are provided on the base column 610; 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 microalgae caused by pumping.

[0104] 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, and the two ends are respectively fixed on the edge of the liquid-permeable channel 613, forming a closed space together with the inner wall of the liquid-permeable channel 613. This closed space is communicated with the side pump body 203, and 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 the turbulence and obtaining different water-gas mixing effects.

[0105] Preferably, there is an independent air pump to control the expansion and contraction of the inner conical tube 614 using cleaning gas.

[0106] Preferably, when it is necessary to empty the serpentine container tube 300 at one time, the inner conical tube 614 can be first controlled to expand to close the liquid-permeable channel 613.

[0107] Example Three

[0108] In order to further extend the maintenance interval duration of the device of this application, increase the cleaning effect and improve the cleaning speed, in this embodiment of the application, on the basis of the above embodiment, the structure of the inner cleaning displacement plug 600 is further optimized and improved. Specifically:

[0109] As Figure 11 、 Figure 12 and Figure 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;

[0110] The end bearing ring 660 is a rigid ring body, with a diameter more than 0.8 times the end face diameter of the base column 610, coaxial with the base column 610, and fixed at one end of the base column 610;

[0111] The displacement bearing ring 670 and the bearing column 680 are positioned at the other end of the base column 610, both coaxial with the base column 610; the displacement bearing ring 670 is a rigid ring body, with a diameter more than 0.8 times the end face diameter of the base column 610;

[0112] The bearing column 680 is an electric or pneumatic telescopic rod, with one end fixed on the end face of the base column 610; the displacement bearing ring 670 is fixed on the bearing column 680 through a rigid rod body or a rigid plate body, and approaches or moves away from the end face of the base column 610 as the bearing column 680 expands and contracts;

[0113] The isolation ring 640 is tubular, composed of two spliced pipe bodies. The material of one pipe body is elastic rubber, and the material of the other end pipe body is cloth (natural fiber or chemical fiber), preferably polyester;

[0114] The two end edges of the isolation ring 640 are respectively fixed on the edge of the end bearing ring 660 and the edge of the displacement bearing ring 670;

[0115] During use, the contact position between the isolation ring 640 and the outer sleeve ring 630 can be flexibly adjusted through the expansion and contraction of the bearing column 680.

[0116] Preferably, as Figure 14 shown, the isolation ring 640 is a pipe composed of multiple spliced pipe bodies. At least one of the multiple pipe bodies is made of elastic rubber, and the materials of the other component pipe bodies can be different. Some pipe bodies are in a mesh structure; in the cleaning mode, the isolation ring 640 can be controlled to reciprocate, so as to make different sections of the pipe body contact the pipe wall of the snake-shaped container pipe 300, thereby assisting in the scrubbing process and obtaining different scrubbing effects.

[0117] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within 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, and 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 a controlled expansion and contraction elastic ring is provided on the side wall; the elastic ring contacts the tube wall after expansion; 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; The other end of the gas delivery hose (204) is fixed to a position close to 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 water-gas mixing.

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: 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).

4. 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.

5. The supercritical water treatment device with microalgae carbon fixation function as claimed in claim 3, 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.

6. The supercritical water treatment device with microalgae carbon fixation function as claimed in claim 5, 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.

7. The supercritical water treatment device with microalgae carbon fixation function according to any one of claims 3 to 5, 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 shift 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 sleeve ring (630) can be flexibly adjusted by telescoping the bearing column (680).

8. The supercritical water treatment device with microalgae carbon fixation function as claimed in claim 7, 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.

9. 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 turbulence mode; In the cleaning mode, the end valve (310) is opened to a value 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 inner 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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