High-efficiency industrial solid waste coupling absorbent absorption-solidification CO2 recycling process and high-efficiency industrial solid waste coupling absorbent absorption-solidification CO2 recycling system

Abstract

The invention discloses an efficient recycling process and system for absorbing and curing CO2 by using an industrial solid waste coupling absorbent. The system comprises a high-efficiency gas-liquid rheological reactor, an absorption rich liquid buffer container, an absorption rich liquid circulating pump, a high-efficiency liquid-liquid regeneration rheological reactor, a solid-liquid mixed liquid buffer container, a solid-liquid mixed liquid circulating pump, a solid-liquid separation tank and a regeneration absorption liquid buffer container which are arranged in sequence. According to the invention, an efficient gas-liquid rheological reactor and an efficient liquid-liquid regeneration rheological reactor are adopted, a mixed absorption liquid is matched and selected as a CO2 absorbent, and alkaline industrial solid wastes (steel slag, fly ash, carbide slag, fire coal fly ash, red mud, ardealite, petroleum coke ash, steelmaking dust and the like) are used as CO2 curing raw materials, so that efficient and low-cost CO2 emission reduction can be realized; and moreover, a stable resource product carbonate is generated, and meanwhile, regeneration and cyclic utilization of the absorption liquid can be realized.

Description

Technical Field

[0001] The present invention relates to the technical field of carbon dioxide emission reduction treatment, and in particular to a high-efficiency industrial solid waste coupled absorbent absorption-solidification CO2 recycling process and system. Background Art

[0002] Carbon capture, utilization and storage (CCUS) is internationally recognized as one of the key technologies that are indispensable for mitigating climate change and protecting the human living environment. Among CO2 utilization technologies, CO2 mineralization (CO2 mineralization) synergistic pollution reduction and carbon reduction utilization technology has attracted much attention due to its advantages such as low cost, large scale and long-term stability. CO2 mineralization is a process that uses CO2 to react with alkali metal minerals to generate stable carbonates, such as calcite (CaCO3), dolomite (CaCO3), and quartz (CaCO3). 0.5 MgO5CO3), magnesite (MgCO3) and siderite (FeCO3), and prepare high value-added products for further utilization. The raw materials for the mineralization and utilization of CO2 can be roughly divided into two categories: natural alkaline rocks and industrial solid waste. Among them, industrial solid waste (steel slag, carbide slag and phosphogypsum, etc.) is rich in source, huge in reserves, low in price, has the advantages of large-scale fixation potential and good economic benefits, can effectively mineralize and utilize CO2, and is an ideal mineralization raw material.

[0003] The absorption carbon capture-mineralization recycling process introduces CO2 mineralization technology into the chemical absorption CO2 capture technology. After CO2 is absorbed by the chemical absorption solution in the absorption tower, the CO2 in the rich liquid is mineralized and fixed using cheap raw materials (CaO, Ca(OH)2, industrial solid waste, etc.) during the regeneration of the absorption solution, and the absorption solution is regenerated and recycled. The regeneration of the chemical absorption solution is changed from temperature-controlled chemical regeneration to pH control, which reduces the energy consumption of the absorption solution regeneration and realizes the resource utilization of industrial solid waste. However, due to the complexity and variability of the composition of industrial solid waste, the absorption carbon capture-mineralization recycling process parameters are difficult to determine. During the CO2 absorption-mineralization desorption process, problems such as pipeline blockage are very likely to occur, resulting in system collapse and reduced efficiency.

[0004] Therefore, it is necessary to improve the existing technology to provide a more reliable solution. Summary of the invention

[0005] The technical problem to be solved by the present invention is to provide a high-efficiency industrial solid waste coupled absorbent absorption-solidification CO2 recycling process and system in view of the deficiencies in the above-mentioned prior art.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: In the first aspect of the present invention, a high-efficiency industrial solid waste coupled absorbent absorption-solidification CO2 recycling process is provided, which comprises the following steps:

[0007] 1) Fill the absorption liquid in the absorption rich liquid buffer container in advance, and fill the industrial solid waste slurry in the high-efficiency liquid-liquid regeneration rheological reactor;

[0008] 2) The flue gas to be treated is introduced into the gas-liquid high-efficiency mixing reaction tube of the high-efficiency gas-liquid rheological reactor;

[0009] A portion of the mixed liquid 1 in the absorption rich liquid buffer container is transported to the gas-liquid high-efficiency mixing reaction tube of the high-efficiency gas-liquid rheological reactor through the absorption rich liquid circulation pump, and mixed with the incoming flue gas in the gas-liquid high-efficiency mixing reaction tube for reaction, and the absorption rich liquid formed by the reaction enters the absorption rich liquid buffer container, and the flue gas after the reaction is discharged from the high-efficiency gas-liquid rheological reactor;

[0010] 3) Another part of the mixed liquid 1 in the absorption rich liquid buffer container is transported by the absorption rich liquid circulation pump to the liquid-liquid high-efficiency mixing reaction tube of the high-efficiency liquid-liquid regeneration rheological reactor;

[0011] The mixed liquid 2 in the solid-liquid mixed liquid buffer container is transported to the liquid-liquid high-efficiency mixing reaction tube of the high-efficiency liquid-liquid regeneration rheological reactor by a solid-liquid mixed liquid circulation pump, and external air is sucked in through the liquid-liquid high-efficiency mixing reaction tube. The mixed liquid 1, the mixed liquid 2 and the air are mixed and reacted in the liquid-liquid high-efficiency mixing reaction tube, and the solid-liquid mixed liquid after the reaction enters the solid-liquid mixed liquid buffer container;

[0012] 4) Monitor the Ca content of the solid-liquid mixture in the solid-liquid mixture buffer container. 2+ Mg 2+ Ion content, when Ca 2+ Mg 2+ When the content of at least one of the ions is lower than the set value, the solid-liquid mixture is transported to the solid-liquid separation tank for solid-liquid separation, and the resulting supernatant enters the regeneration absorption liquid buffer container and is then transported to the high-efficiency gas-liquid rheology reactor for recycling.

[0013] Preferably, the absorption liquid is a mixture of at least one of monoethanolamine, diethanolamine and triethanolamine with piperazine, an organic solvent and water.

[0014] Preferably, the absorption liquid is a mixture of triethanolamine, piperazine, an organic solvent and water, wherein the volume ratio of triethanolamine:piperazine:organic solvent:water is (1:1:1:1) to (2:1:1:1).

[0015] Preferably, the industrial solid waste slurry is prepared from calcium-containing industrial solid waste and water, with a liquid-to-solid ratio of 10 to 15 L / kg.

[0016] Preferably, the calcium-containing industrial solid waste is selected from at least one of steel slag, carbide slag, phosphogypsum and fly ash.

[0017] Preferably, in step 3), the pH value in the liquid-liquid efficient mixing reaction tube is controlled to be 9.5-10.5 by adding liquid alkali.

[0018] The second aspect of the present invention provides a high-efficiency industrial solid waste coupled absorbent absorption-solidification CO2 recycling system, which adopts the process as described above to treat flue gas containing CO2. The system includes a high-efficiency gas-liquid rheological reactor, an absorption rich liquid buffer container, an absorption rich liquid circulation pump, a high-efficiency liquid-liquid regeneration rheological reactor, a solid-liquid mixed liquid buffer container, a solid-liquid mixed liquid circulation pump, a solid-liquid separation tank and a regenerated absorption liquid buffer container arranged in sequence.

[0019] Preferably, the high-efficiency gas-liquid rheological reactor comprises a gas-liquid rheological reaction tower and a gas-liquid high-efficiency mixing reaction tube arranged on the upper part of the gas-liquid rheological reaction tower;

[0020] The upper part of the gas-liquid rheological reaction tower is provided with a regeneration liquid inlet and a flue gas outlet, and the lower part of the gas-liquid rheological reaction tower is laterally provided with an absorption rich liquid outlet connected to the absorption rich liquid buffer container;

[0021] The gas-liquid high-efficiency mixing reaction tube comprises a first cylindrical tube section, a first conical nozzle coaxially arranged in the first cylindrical tube section, a first air inlet pipe tangentially connected to the first cylindrical tube section, a first throat section connected to the first cylindrical tube section, and a first diffusion tube section connected to the first throat section;

[0022] The flue gas to be treated enters the gas-liquid high-efficiency mixing reaction tube from the first air inlet pipe, and is mixed and reacted with the mixed liquid 1 entering from the first conical nozzle in the gas-liquid high-efficiency mixing reaction tube. The absorption rich liquid formed by the reaction is discharged through the absorption rich liquid outlet into the absorption rich liquid buffer container, and the flue gas after the reaction is discharged from the high-efficiency gas-liquid rheology reactor through the flue gas outlet.

[0023] Preferably, the high-efficiency liquid-liquid regeneration rheological reactor comprises a liquid-liquid regeneration rheological reaction tower and a liquid-liquid high-efficiency mixing reaction tube arranged on the upper part of the liquid-liquid regeneration rheological reaction tower;

[0024] The upper part of the liquid-liquid regeneration rheological reaction tower is provided with an industrial solid waste slurry inlet, and the lower part is provided with a solid-liquid mixed liquid outlet connected to the solid-liquid mixed liquid buffer container;

[0025] The liquid-liquid high-efficiency mixing reaction tube comprises a second cylindrical tube section, a second conical nozzle coaxially arranged in the second cylindrical tube section, a second air inlet pipe tangentially connected to the second cylindrical tube section, a first lateral liquid inlet tangentially connected to the second cylindrical tube section, a second lateral liquid inlet tangentially connected to the second cylindrical tube section, a second throat section connected to the second cylindrical tube section, and a second diffusion tube section connected to the second throat section, wherein the second air inlet pipe is connected to an external air environment;

[0026] The second lateral liquid inlet is used to add liquid alkali into the liquid-liquid high-efficiency mixing reaction tube, and the mixed liquid 1 delivered by the absorption rich liquid circulation pump, the mixed liquid 2 delivered by the solid-liquid mixed liquid circulation pump, the liquid alkali from the second lateral liquid inlet and the air sucked into the second air inlet pipe react in the liquid-liquid high-efficiency mixing reaction tube, and the solid-liquid mixed liquid after the reaction is discharged through the solid-liquid mixed liquid outlet into the solid-liquid mixed liquid buffer container.

[0027] Preferably, the outlet end of the absorption rich liquid buffer container is connected to the absorption rich liquid circulation pump, the output end of the absorption rich liquid circulation pump is connected in parallel with a first circulation pipe and a first delivery pipe, the first circulation pipe is connected to the first conical nozzle of the gas-liquid high-efficiency mixing reaction tube, and the first delivery pipe is connected to the first lateral liquid inlet of the liquid-liquid high-efficiency mixing reaction tube;

[0028] The outlet end of the solid-liquid mixed liquid cache container is connected to the solid-liquid mixed liquid circulation pump, and the output end of the solid-liquid mixed liquid circulation pump is connected in parallel with a second circulation pipe and a second delivery pipe, the second circulation pipe is connected to the second conical nozzle of the liquid-liquid high-efficiency mixing reaction tube, and the second delivery pipe is connected to the solid-liquid separation tank;

[0029] Valves are provided on the first circulation pipe, the first delivery pipe, the second circulation pipe and the second delivery pipe;

[0030] The upper part of the solid-liquid separation tank is provided with a regeneration liquid outlet connected to the regeneration absorption liquid buffer container, and the lower part is provided with a slag discharge port; the regeneration liquid outlet is connected to the regeneration liquid inlet of the high-efficiency gas-liquid rheology reactor.

[0031] Preferably, both the absorption rich liquid buffer container and the solid-liquid mixed liquid buffer container are provided with a vent pipe.

[0032] The beneficial effects of the present invention are:

[0033] The present invention provides a high-efficiency industrial solid waste coupled absorbent absorption-solidification CO2 recycling process and system, which adopts a high-efficiency gas-liquid rheological reactor and a high-efficiency liquid-liquid regeneration rheological reactor, and uses a mixed absorption liquid as a CO2 absorbent, and uses alkaline industrial solid waste (steel slag, fly ash, carbide slag, coal fly ash, red mud, phosphogypsum, petroleum coke, steelmaking dust, etc.) as a CO2 solidification raw material, which can achieve high-efficiency and low-cost CO2 emission reduction, and produce a stable resource product carbonate, and at the same time can also achieve the regeneration and recycling of the absorption liquid;

[0034] The present invention adopts two new high-efficiency reaction equipments to realize the absorption and capture of CO2 in flue gas and the regeneration of industrial solid waste carbon fixation absorption liquid. The energy consumption of the whole process can be reduced by absorbing the rich liquid diversion. The absorption liquid can operate stably with high CO2 absorption capacity, high circulation load and high regeneration efficiency.

[0035] The present invention adopts a chemical regeneration method to achieve absorption liquid regeneration, and couples the desorption of the absorption liquid with the carbon fixation and CO2 storage of industrial solid waste in a high-efficiency liquid-liquid regeneration rheological reactor, so that the absorption rich liquid reacts with calcium-containing compounds and magnesium-containing compounds in the industrial solid waste to generate calcium carbonate and magnesium carbonate precipitates. While the absorption liquid is desorbed and regenerated, the CO2 storage and industrial solid waste resource utilization are achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural schematic diagram of the high-efficiency industrial solid waste coupled absorbent absorption-solidification CO2 recycling system of the present invention;

[0037] Figure 2 This is a schematic diagram of the structure of the gas-liquid high-efficiency mixing reaction tube in the present invention;

[0038] Figure 3 This is a schematic diagram of the structure of the liquid-liquid efficient mixing reaction tube in the present invention;

[0039] Figure 4 The test results of the CO2 concentration at the flue gas outlet of the process systems of Example 1 and Example 2 of the present invention after one week of operation;

[0040] Figure 5 The average carbon fixation rate is calculated after the process systems of Example 1 and Example 2 of the present invention are operated for one week.

[0041] Description of reference numerals:

[0042] 1—high-efficiency gas-liquid rheological reactor; 11—gas-liquid rheological reaction tower; 12—gas-liquid high-efficiency mixed reaction tube; 111—regeneration liquid inlet; 112—flue gas outlet; 113—absorption rich liquid outlet; 121—first column pipe section; 122—first conical nozzle; 123—first air inlet pipe; 124—first throat section; 125—first diffusion pipe section;

[0043] 2—absorption rich liquid buffer container; 21—vent pipe;

[0044] 3—absorption rich liquid circulation pump; 31—first circulation pipe; 32—first delivery pipe;

[0045] 4—high-efficiency liquid-liquid regeneration rheological reactor; 41—liquid-liquid regeneration rheological reaction tower; 42—liquid-liquid high-efficiency mixing reaction tube; 411—industrial solid waste slurry inlet; 412—solid-liquid mixed liquid outlet; 421—second cylindrical pipe section; 422—second conical nozzle; 423—second air inlet pipe; 424—first lateral liquid inlet; 425—second lateral liquid inlet; 426—second throat section; 427—second diffusion pipe section;

[0046] 5—solid-liquid mixed liquid buffer container; 51—vent pipe;

[0047] 6—solid-liquid mixed liquid circulation pump; 61—second circulation pipe; 62—second delivery pipe;

[0048] 7—solid-liquid separation tank; 71—regeneration liquid outlet; 72—slag discharge outlet;

[0049] 8—Regenerated absorption liquid buffer container. DETAILED DESCRIPTION

[0050] The present invention is further described in detail below in conjunction with embodiments so that those skilled in the art can implement the invention with reference to the description.

[0051] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0052] The test methods used in the following examples are conventional methods unless otherwise specified. The materials and reagents used in the following examples are all commercially available unless otherwise specified. In the following examples, if no specific conditions are specified, the experiments were carried out under conventional conditions or conditions recommended by the manufacturer. The reagents or instruments used, if the manufacturer is not specified, are all conventional products that can be purchased commercially.

[0053] The present invention provides a high-efficiency industrial solid waste coupled absorbent absorption-solidification CO2 recycling system and its process, the system comprises a high-efficiency gas-liquid rheological reactor 1, an absorption rich liquid buffer container 2, an absorption rich liquid circulation pump 3, a high-efficiency liquid-liquid regeneration rheological reactor 4, a solid-liquid mixed liquid buffer container 5, a solid-liquid mixed liquid circulation pump 6, a solid-liquid separation tank 7 and a regeneration absorption liquid buffer container 8, which are arranged in sequence.

[0054] In the present invention, the high-efficiency gas-liquid rheological reactor 1 comprises a gas-liquid rheological reaction tower 11 and a gas-liquid high-efficiency mixing reaction tube 12 arranged on the upper part of the gas-liquid rheological reaction tower 11;

[0055] The upper part of the gas-liquid rheological reaction tower 11 is provided with a regeneration liquid inlet 111 and a flue gas outlet 112, and the lower part of the gas-liquid rheological reaction tower 11 is laterally provided with an absorption rich liquid outlet 113 connected to the absorption rich liquid buffer container 2;

[0056] The gas-liquid high-efficiency mixed reaction tube 12 comprises a first cylindrical tube section 121, a first conical nozzle 122 coaxially arranged in the first cylindrical tube section 121, a first air inlet pipe 123 tangentially connected to the first cylindrical tube section 121, a first throat section 124 connected to the first cylindrical tube section 121, and a first diffusion tube section 125 connected to the first throat section 124;

[0057] The flue gas to be treated enters the gas-liquid high-efficiency mixed reaction tube 12 from the first air inlet pipe 123, and is mixed and reacted with the mixed liquid 1 entering from the first conical nozzle 122 in the gas-liquid high-efficiency mixed reaction tube 12. The absorption rich liquid formed by the reaction is discharged into the absorption rich liquid buffer container 2 through the absorption rich liquid outlet 113, and the flue gas after the reaction is discharged from the high-efficiency gas-liquid rheological reactor 1 through the flue gas outlet 112. The first cylindrical pipe section 121 is located at the periphery of the first conical nozzle 122 to form an air suction chamber, and the first conical nozzle 122 forms a jet to spray fluid, so that negative pressure is formed in the air suction chamber, so that suction can be generated in the first air inlet pipe 123 to inhale gas, and the gas and liquid are fully mixed inside, and the fluid is accelerated through the contracted first throat section 124, and then sprayed out from the first diffuser pipe section 125 to achieve a gas-liquid high-efficiency mixed reaction.

[0058] In the present invention, the high-efficiency liquid-liquid regeneration rheological reactor 4 comprises a liquid-liquid regeneration rheological reaction tower 41 and a liquid-liquid high-efficiency mixing reaction tube 42 arranged on the upper part of the liquid-liquid regeneration rheological reaction tower 41;

[0059] The upper part of the liquid-liquid regeneration rheological reaction tower 41 is provided with an industrial solid waste slurry inlet 411, and the lower part is provided with a solid-liquid mixed liquid outlet 412 connected to the solid-liquid mixed liquid buffer container 5;

[0060] The liquid-liquid efficient mixing reaction tube 42 includes a second cylindrical tube section 421, a second conical nozzle 422 coaxially arranged in the second cylindrical tube section 421, a second air inlet pipe 423 tangentially connected to the second cylindrical tube section 421, a first lateral liquid inlet 424 tangentially connected to the second cylindrical tube section 421, a second lateral liquid inlet 425 tangentially connected to the second cylindrical tube section 421, a second throat section 426 connected to the second cylindrical tube section 421, and a second diffusion tube section 427 connected to the second throat section 426. The second air inlet pipe 423 is connected to the external air environment.

[0061] The second lateral liquid inlet 425 is used to add liquid alkali into the liquid-liquid high-efficiency mixing reaction tube 42, and the mixed liquid 1 delivered from the absorption rich liquid circulation pump 3 and entering from the first lateral liquid inlet 424, the mixed liquid 2 delivered from the solid-liquid mixed liquid circulation pump 6, the liquid alkali from the second lateral liquid inlet 425 and the air sucked from the second air inlet pipe 423 react in the liquid-liquid high-efficiency mixing reaction tube 42, and the reacted solid-liquid mixed liquid is discharged from the solid-liquid mixed liquid outlet 412 and enters the solid-liquid mixed liquid buffer container 5. The working principle of the liquid-liquid high-efficiency mixing reaction tube 42 is similar to that of the gas-liquid high-efficiency mixing reaction tube 12, except that the liquid-liquid high-efficiency mixing reaction tube 42 simultaneously realizes the high-efficiency mixing reaction of the mixed liquid 1, the mixed liquid 2, the liquid alkali and the air.

[0062] In the present invention, the outlet end of the absorption rich liquid buffer container 2 is connected to the absorption rich liquid circulation pump 3, and the output end of the absorption rich liquid circulation pump 3 is connected in parallel with the first circulation pipe 31 and the first delivery pipe 32, the first circulation pipe 31 is connected to the first conical nozzle 122 of the gas-liquid high-efficiency mixing reaction tube 12, and the first delivery pipe 32 is connected to the first lateral liquid inlet 424 of the liquid-liquid high-efficiency mixing reaction tube 42.

[0063] In the present invention, the outlet end of the solid-liquid mixed liquid buffer container 5 is connected to the solid-liquid mixed liquid circulation pump 6, and the output end of the solid-liquid mixed liquid circulation pump 6 is connected in parallel with a second circulation pipe 61 and a second delivery pipe 62, the second circulation pipe 61 is connected to the second conical nozzle 422 of the liquid-liquid efficient mixing reaction tube 42, and the second delivery pipe 62 is connected to the solid-liquid separation tank 7;

[0064] The first circulation pipe 31, the first delivery pipe 32, the second circulation pipe and the second delivery pipe 62 are all provided with valves, through which the flow ratio of each route is adjusted;

[0065] The solid-liquid separation tank 7 has a regeneration liquid outlet 71 connected to the regeneration absorption liquid buffer container 8 at the top and a slag discharge port 72 at the bottom; the regeneration liquid outlet 71 is connected to the regeneration liquid inlet 111 of the high-efficiency gas-liquid rheological reactor 1 .

[0066] In the present invention, both the absorption rich liquid buffer container 2 and the solid-liquid mixed liquid buffer container 5 are provided with vent pipes for discharging gas.

[0067] The present invention also provides a high-efficiency industrial solid waste coupled absorbent absorption-solidification CO2 recycling process based on the above system, which process comprises the following steps:

[0068] 1) Fill the absorption liquid in the absorption rich liquid buffer container 2 in advance, and fill the industrial solid waste slurry in the high-efficiency liquid-liquid regeneration rheological reactor 4;

[0069] In a preferred embodiment, the absorption liquid is a mixture of at least one of monoethanolamine, diethanolamine, triethanolamine and piperazine, an organic solvent and water; wherein the volume ratio of triethanolamine:piperazine:organic solvent:water is (1:1:1:1) to (2:1:1:1).

[0070] In a preferred embodiment, the industrial solid waste slurry is prepared from calcium-containing industrial solid waste and water, with a liquid-to-solid ratio of 10 to 15 L / kg. The calcium-containing industrial solid waste can be selected from at least one of high-calcium industrial solid wastes such as steel slag, carbide slag, phosphogypsum, fly ash, etc.;

[0071] 2) Flue gas containing carbon dioxide to be treated is introduced into the first air inlet pipe 123 of the gas-liquid high-efficiency mixing reaction tube 12 of the high-efficiency gas-liquid rheological reactor 1;

[0072] A portion of the mixed liquid 1 in the absorption rich liquid buffer container 2 is transported to the gas-liquid high-efficiency mixing reaction tube 12 of the high-efficiency gas-liquid rheological reactor 1 by the absorption rich liquid circulation pump 3, and mixed with the incoming flue gas in the gas-liquid high-efficiency mixing reaction tube 12 for reaction, and the absorption rich liquid formed by the reaction enters the absorption rich liquid buffer container 2, and the flue gas after the reaction is discharged from the high-efficiency gas-liquid rheological reactor 1;

[0073] Under the action of the absorption rich liquid circulation pump 3, the mixed liquid 1 enters the first conical nozzle 122 of the gas-liquid high-efficiency mixed reaction tube 12 at a certain pressure, forming a high-speed jet ejection, and the suction chamber around the jet outlet generates a negative pressure, so that the flue gas volume entering from the first air inlet pipe 123 is sucked into the gas-liquid high-efficiency mixed reaction tube 12. Inside the gas-liquid high-efficiency mixed reaction tube 12, the flue gas is dispersed in the absorption liquid in the form of fine bubbles, and the gas-liquid two phases are fully mixed and contacted to form a high-speed foam vortex. The gas-liquid high-efficiency mixed reaction tube 12 has a strong turbulent flow, the mass transfer efficiency of the system is improved, and the reaction rate of the main active components in the absorption liquid with CO2 in the flue gas is greatly increased.

[0074] In a preferred embodiment, the incoming flue gas flow rate is 100-200m 3 / h, temperature 60~70℃, CO2 concentration 15%~20%.

[0075] The flue gas after the reaction is discharged from the flue gas outlet 112 of the high-efficiency gas-liquid rheological reactor 1 .

[0076] 3) Another part of the mixed liquid 1 in the absorption rich liquid buffer container 2 is transported by the absorption rich liquid circulation pump 3 to the liquid-liquid high-efficiency mixing reaction tube 42 of the high-efficiency liquid-liquid regeneration rheological reactor 4 to continue to capture and absorb CO2 in the flue gas;

[0077] The mixed liquid 2 in the solid-liquid mixed liquid buffer container 5 is transported to the liquid-liquid high-efficiency mixing reaction tube 42 of the high-efficiency liquid-liquid regeneration rheological reactor 4 by the solid-liquid mixed liquid circulation pump 6, and at the same time, external air is sucked in through the liquid-liquid high-efficiency mixing reaction tube 42, and the mixed liquid 1, the mixed liquid 2 and the air are mixed and reacted in the liquid-liquid high-efficiency mixing reaction tube 42, and the solid-liquid mixed liquid after the reaction enters the solid-liquid mixed liquid buffer container 5;

[0078] The mixed liquid 2 enters the second conical nozzle 422 of the liquid-liquid high-efficiency mixed reaction tube 42 at a certain pressure under the action of the solid-liquid mixed liquid circulation pump 6, forming a high-speed jet ejection, and the suction chamber around the jet outlet generates a negative pressure, so that the air volume entering from the second air inlet pipe 423 is sucked into the gas-liquid high-efficiency mixed reaction tube 12, and at the same time, the mixed liquid 1 entering from the first side liquid inlet 424 and the liquid alkali entering from the second side liquid inlet 425 are efficiently mixed inside the gas-liquid high-efficiency mixed reaction tube 12, and the liquid-liquid two phases are fully mixed and contacted. Under the action of air, a high-speed foam vortex is formed, and the liquid-liquid high-efficiency mixed reaction tube 42 is a strong turbulent flow, and the mass transfer efficiency of the system is improved. The pH of the reaction system in the liquid-liquid high-efficiency mixed reaction tube 42 is controlled by controlling the amount of liquid alkali added to maintain at 9.5-10.5. This process completes the regeneration of the absorption liquid and the fixation of industrial solid waste carbon.

[0079] 4) Monitor the Ca content of the solid-liquid mixture in the solid-liquid mixture buffer container 5. 2+ Mg 2+ Ion content, when Ca 2+ Mg 2+ When the content of at least one of the ions is lower than the set value, the solid-liquid mixture is transported to the solid-liquid separation tank 7 for solid-liquid separation, and the resulting supernatant enters the regeneration absorption liquid buffer container 8, and then is transported to the high-efficiency gas-liquid rheology reactor 1 for recycling.

[0080] The above is the overall concept of the present invention, and detailed embodiments and comparative examples are provided below on the basis of the overall concept of the present invention to further illustrate the present invention.

[0081] Example 1

[0082] A high-efficiency industrial solid waste coupled absorbent absorption-solidification CO2 recycling system and process thereof, the system comprises a high-efficiency gas-liquid rheological reactor 1, an absorption rich liquid buffer container 2, an absorption rich liquid circulation pump 3, a high-efficiency liquid-liquid regeneration rheological reactor 4, a solid-liquid mixed liquid buffer container 5, a solid-liquid mixed liquid circulation pump 6, a solid-liquid separation tank 7 and a regenerated absorption liquid buffer container 8, which are arranged in sequence.

[0083] In this embodiment, the high-efficiency gas-liquid rheological reactor 1 includes a gas-liquid rheological reaction tower 11 and a gas-liquid high-efficiency mixed reaction tube 12 arranged on the upper part of the gas-liquid rheological reaction tower 11;

[0084] The upper part of the gas-liquid rheological reaction tower 11 is provided with a regeneration liquid inlet 111 and a flue gas outlet 112, and the lower part of the gas-liquid rheological reaction tower 11 is laterally provided with an absorption rich liquid outlet 113 connected to the absorption rich liquid buffer container 2;

[0085] The gas-liquid high-efficiency mixed reaction tube 12 comprises a first cylindrical tube section 121, a first conical nozzle 122 coaxially arranged in the first cylindrical tube section 121, a first air inlet pipe 123 tangentially connected to the first cylindrical tube section 121, a first throat section 124 connected to the first cylindrical tube section 121, and a first diffusion tube section 125 connected to the first throat section 124;

[0086] The flue gas to be treated enters the gas-liquid high-efficiency mixing reaction tube 12 from the first air inlet pipe 123, and is mixed and reacted with the mixed liquid 1 entering from the first conical nozzle 122 in the gas-liquid high-efficiency mixing reaction tube 12. The absorption rich liquid formed by the reaction is discharged into the absorption rich liquid buffer container 2 through the absorption rich liquid outlet 113, and the flue gas after the reaction is discharged from the high-efficiency gas-liquid rheology reactor 1 through the flue gas outlet 112.

[0087] In this embodiment, the high-efficiency liquid-liquid regeneration rheological reactor 4 includes a liquid-liquid regeneration rheological reaction tower 41 and a liquid-liquid high-efficiency mixing reaction tube 42 arranged on the upper part of the liquid-liquid regeneration rheological reaction tower 41;

[0088] The upper part of the liquid-liquid regeneration rheological reaction tower 41 is provided with an industrial solid waste slurry inlet 411, and the lower part is provided with a solid-liquid mixed liquid outlet 412 connected to the solid-liquid mixed liquid buffer container 5;

[0089] The liquid-liquid efficient mixing reaction tube 42 includes a second cylindrical tube section 421, a second conical nozzle 422 coaxially arranged in the second cylindrical tube section 421, a second air inlet pipe 423 tangentially connected to the second cylindrical tube section 421, a first lateral liquid inlet 424 tangentially connected to the second cylindrical tube section 421, a second lateral liquid inlet 425 tangentially connected to the second cylindrical tube section 421, a second throat section 426 connected to the second cylindrical tube section 421, and a second diffusion tube section 427 connected to the second throat section 426. The second air inlet pipe 423 is connected to the external air environment.

[0090] The second lateral liquid inlet 425 is used to add liquid alkali into the liquid-liquid high-efficiency mixing reaction tube 42, and the mixed liquid 1 delivered by the absorption rich liquid circulation pump 3 entering from the first lateral liquid inlet 424, the mixed liquid 2 delivered by the solid-liquid mixed liquid circulation pump 6, and the liquid alkali from the second lateral liquid inlet 425 react with the air sucked in by the second air inlet pipe 423 in the liquid-liquid high-efficiency mixing reaction tube 42, and the solid-liquid mixed liquid after the reaction is discharged through the solid-liquid mixed liquid outlet 412 into the solid-liquid mixed liquid buffer container 5.

[0091] In this embodiment, the outlet end of the absorption rich liquid buffer container 2 is connected to the absorption rich liquid circulation pump 3, and the output end of the absorption rich liquid circulation pump 3 is connected in parallel with the first circulation pipe 31 and the first delivery pipe 32. The first circulation pipe 31 is connected to the first conical nozzle 122 of the gas-liquid high-efficiency mixing reaction tube 12, and the first delivery pipe 32 is connected to the first lateral liquid inlet 424 of the liquid-liquid high-efficiency mixing reaction tube 42.

[0092] In the present invention, the outlet end of the solid-liquid mixed liquid buffer container 5 is connected to the solid-liquid mixed liquid circulation pump 6, and the output end of the solid-liquid mixed liquid circulation pump 6 is connected in parallel with a second circulation pipe 61 and a second delivery pipe 62, the second circulation pipe 61 is connected to the second conical nozzle 422 of the liquid-liquid efficient mixing reaction tube 42, and the second delivery pipe 62 is connected to the solid-liquid separation tank 7;

[0093] The first circulation pipe 31, the first delivery pipe 32, the second circulation pipe and the second delivery pipe 62 are all provided with valves, through which the flow ratio of each route is adjusted;

[0094] The solid-liquid separation tank 7 has a regeneration liquid outlet 71 connected to the regeneration absorption liquid buffer container 8 at the top and a slag discharge port 72 at the bottom; the regeneration liquid outlet 71 is connected to the regeneration liquid inlet 111 of the high-efficiency gas-liquid rheological reactor 1 .

[0095] In this embodiment, a vent pipe 21 is provided on the absorption rich liquid buffer container 2, and a vent pipe 51 is provided on the solid-liquid mixed liquid buffer container 5, for exhausting gas.

[0096] This embodiment also provides a highly efficient industrial solid waste coupled absorbent absorption-solidification CO2 recycling process based on the above system, which process includes the following steps:

[0097] 1) Pre-fill 50m3 of the absorption rich liquid buffer container 2 3 Absorbing liquid, 2 tons of industrial solid waste slurry is filled in the high-efficiency liquid-liquid regeneration rheological reactor 4;

[0098] In this embodiment, the absorption liquid is a mixture of triethanolamine, piperazine, an organic solvent (specifically methanol), and water, wherein the volume ratio of triethanolamine:piperazine:organic solvent:water is 2:1:1:1.

[0099] In this embodiment, the industrial solid waste slurry is prepared by calcium-containing industrial solid waste and water, and the liquid-solid ratio is 10L / kg; wherein, the calcium-containing industrial solid waste adopts the ultrafine powder of steel slag of a certain steel group, the particle size of the micropowder is 200-250 mesh, and the main chemical components (mass ratio %) are total iron 20.31%, CaO 35.26%, MgO 3.73%, Zn 0.035%, and the rest are other impurity components.

[0100] 2) Flue containing carbon dioxide to be treated (gas flow rate is 100m3 / h, the temperature fluctuates within the range of 60 to 70°C, and the CO2 volume concentration is 15% to 20%), and is introduced into the first air inlet pipe 123 of the gas-liquid high-efficiency mixing reaction tube 12 of the high-efficiency gas-liquid rheological reactor 1;

[0101] The absorption rich liquid circulation pump 3 absorbs a portion of the mixed liquid 1 in the rich liquid buffer container 2 (flow rate 8m 3 / h) is transported to the gas-liquid high-efficiency mixing reaction tube 12 of the high-efficiency gas-liquid rheological reactor 1, and mixed with the incoming flue gas in the gas-liquid high-efficiency mixing reaction tube 12 for reaction, and the absorption rich liquid formed by the reaction enters the absorption rich liquid buffer container 2, and the flue gas after the reaction is discharged from the high-efficiency gas-liquid rheological reactor 1;

[0102] Under the action of the absorption rich liquid circulation pump 3, the mixed liquid 1 enters the first conical nozzle 122 of the gas-liquid high-efficiency mixed reaction tube 12 at a certain pressure, forming a high-speed jet ejection, and the suction chamber around the jet outlet generates a negative pressure, so that the flue gas volume entering from the first air inlet pipe 123 is sucked into the gas-liquid high-efficiency mixed reaction tube 12. Inside the gas-liquid high-efficiency mixed reaction tube 12, the flue gas is dispersed in the absorption liquid in the form of fine bubbles, and the gas-liquid two phases are fully mixed and contacted to form a high-speed foam vortex. The gas-liquid high-efficiency mixed reaction tube 12 has a strong turbulent flow, the mass transfer efficiency of the system is improved, and the reaction rate of the main active components in the absorption liquid with CO2 in the flue gas is greatly increased.

[0103] 3) Absorb another part of the mixed liquid 1 in the rich liquid buffer container 2 (flow rate is 6m 3 / h) the absorbed rich liquid is transported by the circulating pump 3 to the liquid-liquid high-efficiency mixing reaction tube 42 of the high-efficiency liquid-liquid regeneration rheological reactor 4 to continue capturing and absorbing CO2 in the flue gas;

[0104] The mixed liquid 2 (flow rate 6m 3 / h) is transported to the liquid-liquid high-efficiency mixing reaction tube 42 of the high-efficiency liquid-liquid regeneration rheological reactor 4, and external air is sucked through the liquid-liquid high-efficiency mixing reaction tube 42. The mixed liquid 1, the mixed liquid 2 and the air are mixed and reacted in the liquid-liquid high-efficiency mixing reaction tube 42, and the solid-liquid mixed liquid after the reaction enters the solid-liquid mixed liquid buffer container 5;

[0105] The mixed liquid 2 enters the second conical nozzle 422 of the liquid-liquid high-efficiency mixed reaction tube 42 at a certain pressure under the action of the solid-liquid mixed liquid circulation pump 6, forming a high-speed jet ejection, and the suction chamber around the jet outlet generates a negative pressure, so that the air volume entering from the second air inlet pipe 423 is sucked into the gas-liquid high-efficiency mixed reaction tube 12, and at the same time, the mixed liquid 1 entering from the first side liquid inlet 424 and the liquid alkali entering from the second side liquid inlet 425 are efficiently mixed inside the gas-liquid high-efficiency mixed reaction tube 12, and the liquid-liquid two phases are fully mixed and contacted. Under the action of air, a high-speed foam vortex is formed, and the liquid-liquid high-efficiency mixed reaction tube 42 is a strong turbulent flow, and the mass transfer efficiency of the system is improved. The pH of the reaction system in the liquid-liquid high-efficiency mixed reaction tube 42 is controlled by controlling the amount of liquid alkali added to maintain at 9.5-10.5. This process completes the regeneration of the absorption liquid and the fixation of industrial solid waste carbon.

[0106] 4) Monitor the Ca content of the solid-liquid mixture in the solid-liquid mixture buffer container 5. 2+ Mg 2+ Ion content, when Ca 2+ ≤100mg / L or Mg 2+ When the concentration is ≤100 mg / L, the solid-liquid mixture is transported to the solid-liquid separation tank 7 for solid-liquid separation, and the resulting supernatant enters the regeneration absorption liquid buffer container 8, and then is transported to the high-efficiency gas-liquid rheology reactor 1 for recycling.

[0107] Example 2

[0108] This example is basically the same as Example 1, the only difference is that this example uses different calcium-containing industrial solid waste. Specifically, the calcium-containing industrial solid waste in this example is carbide slag grinding powder, the powder particle size is 200-250 mesh, and the main chemical components (oxide form, mass ratio %) are CaO85.26%, SiO23.82%, Al2O30.94%, total iron 0.51%, and the rest are other impurity components.

[0109] Flue gas treatment testing:

[0110] The MH3200 ultraviolet flue gas analyzer was used to measure the CO2 concentration in the inlet and outlet flue gas of the high-efficiency gas-liquid rheological reactor 1; the American LECOCS-344 carbon-sulfur analyzer was used to measure the carbon content (mass percentage %) in industrial solid waste raw materials and industrial solid waste carbon fixation products, and the industrial solid waste carbon fixation rate (%) was calculated using the following formula:

[0111]

[0112] In the formula, m1 and m0 represent the mass of industrial solid waste carbon fixation products and industrial solid waste raw materials, respectively; c1 and c0 represent the carbon content (mass percentage %) in industrial solid waste carbon fixation products and industrial solid waste raw materials, respectively.

[0113] The process systems of Example 1 and Example 2 were respectively used for one week of continuous operation, and the concentration data of 112CO2 at the flue gas outlet were as follows: Figure 1 As shown in the figure, the average carbon fixation rate is calculated as Figure 2 shown.

[0114] The system runs continuously for one week, and the absorption liquid is recycled 8 to 9 times, and still has a high absorption efficiency. The present invention adopts a high-efficiency gas-liquid rheological reactor 1 and a high-efficiency liquid-liquid regeneration rheological reactor 4, selects a mixed absorption liquid as a CO2 absorbent, and uses alkaline industrial solid waste (steel slag, fly ash, carbide slag, coal-fired fly ash, red mud, phosphogypsum, petroleum coke, steelmaking dust, etc.) as a CO2 solidification raw material to achieve high-efficiency, low-cost CO2 emission reduction, and produce a stable resource product carbonate, and realize the regeneration and recycling of the absorption liquid. The present invention couples the absorption of the absorption liquid with the carbon fixation of industrial solid waste, which can not only reduce the energy consumption of high-temperature regeneration of the absorption liquid, but also can generate stable carbonates through solidification reactions, reduce the cost of CO2 capture and storage, and realize the resource utilization of industrial solid waste.

[0115] At the same time, the high-efficiency rheological reactor and combined absorption liquid adopted in the present invention can simultaneously achieve high CO2 absorption rate, high CO2 absorption load and low CO2 desorption energy consumption, and the maximum carbon fixation capacity of the system can reach 583kgCO2 / t industrial solid waste.

[0116] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to specific details.

Claims

1. A highly efficient industrial solid waste coupled absorbent absorption-solidification CO2 recycling process, characterized in that: The process includes the following steps: 1) Fill the absorption liquid in the absorption rich liquid buffer container in advance, and fill the industrial solid waste slurry in the high-efficiency liquid-liquid regeneration rheological reactor; 2) The flue gas to be treated is introduced into the gas-liquid high-efficiency mixing reaction tube of the high-efficiency gas-liquid rheological reactor; A portion of the mixed liquid 1 in the absorption rich liquid buffer container is transported to the gas-liquid high-efficiency mixing reaction tube of the high-efficiency gas-liquid rheological reactor through the absorption rich liquid circulation pump, and mixed with the incoming flue gas in the gas-liquid high-efficiency mixing reaction tube for reaction, and the absorption rich liquid formed by the reaction enters the absorption rich liquid buffer container, and the flue gas after the reaction is discharged from the high-efficiency gas-liquid rheological reactor; 3) Another part of the mixed liquid 1 in the absorption rich liquid buffer container is transported by the absorption rich liquid circulation pump to the liquid-liquid high-efficiency mixing reaction tube of the high-efficiency liquid-liquid regeneration rheological reactor; The mixed liquid 2 in the solid-liquid mixed liquid buffer container is transported to the liquid-liquid high-efficiency mixing reaction tube of the high-efficiency liquid-liquid regeneration rheological reactor by a solid-liquid mixed liquid circulation pump, and external air is sucked in through the liquid-liquid high-efficiency mixing reaction tube. The mixed liquid 1, the mixed liquid 2 and the air are mixed and reacted in the liquid-liquid high-efficiency mixing reaction tube, and the solid-liquid mixed liquid after the reaction enters the solid-liquid mixed liquid buffer container; 4) Monitor the Ca content of the solid-liquid mixture in the solid-liquid mixture buffer container. 2+ Mg 2+ Ion content, when Ca 2+ Mg 2+ When the content of at least one of the ions is lower than the set value, the solid-liquid mixture is transported to the solid-liquid separation tank for solid-liquid separation, and the resulting supernatant enters the regeneration absorption liquid buffer container and is then transported to the high-efficiency gas-liquid rheology reactor for recycling.

2. The high-efficiency industrial solid waste coupled absorbent absorption-solidification CO2 recycling process according to claim 1 is characterized in that: The absorption liquid is a mixture of at least one of monoethanolamine, diethanolamine and triethanolamine, piperazine, an organic solvent and water.

3. The high-efficiency industrial solid waste coupled absorbent absorption-solidification CO2 recycling process according to claim 2 is characterized in that: The absorption liquid is a mixture of triethanolamine, piperazine, an organic solvent and water, wherein the volume ratio of triethanolamine:piperazine:organic solvent:water is (1:1:1:1) to (2:1:1:1).

4. The high-efficiency industrial solid waste coupled absorbent absorption-solidification CO2 recycling process according to claim 1 is characterized in that: The industrial solid waste slurry is prepared by mixing calcium-containing industrial solid waste with water, and the liquid-to-solid ratio is 10-15L / kg.

5. The high-efficiency industrial solid waste coupled absorbent absorption-solidification CO2 recycling process according to claim 1 is characterized in that: The calcium-containing industrial solid waste is selected from at least one of steel slag, carbide slag, phosphogypsum and fly ash.

6. The high-efficiency industrial solid waste coupled absorbent absorption-solidification CO2 recycling process according to claim 1 is characterized in that: In step 3), the pH value in the liquid-liquid efficient mixing reaction tube is controlled to be 9.5-10.5 by adding liquid alkali.

7. An efficient industrial solid waste coupled absorbent absorption-solidification CO2 recycling system, characterized in that: The process described in any one of claims 1 to 6 is used to treat flue gas containing CO2. The system includes a high-efficiency gas-liquid rheological reactor, an absorption rich liquid buffer container, an absorption rich liquid circulation pump, a high-efficiency liquid-liquid regeneration rheological reactor, a solid-liquid mixed liquid buffer container, a solid-liquid mixed liquid circulation pump, a solid-liquid separation tank and a regenerated absorption liquid buffer container which are arranged in sequence.

8. The high-efficiency industrial solid waste coupled absorbent absorption-solidification CO2 recycling system according to claim 7 is characterized in that: The high-efficiency gas-liquid rheological reactor comprises a gas-liquid rheological reaction tower and a gas-liquid high-efficiency mixing reaction tube arranged on the upper part of the gas-liquid rheological reaction tower; The upper part of the gas-liquid rheological reaction tower is provided with a regeneration liquid inlet and a flue gas outlet, and the lower part of the gas-liquid rheological reaction tower is laterally provided with an absorption rich liquid outlet connected to the absorption rich liquid buffer container; The gas-liquid high-efficiency mixing reaction tube comprises a first cylindrical tube section, a first conical nozzle coaxially arranged in the first cylindrical tube section, a first air inlet pipe tangentially connected to the first cylindrical tube section, a first throat section connected to the first cylindrical tube section, and a first diffusion tube section connected to the first throat section; The flue gas to be treated enters the gas-liquid high-efficiency mixing reaction tube from the first air inlet pipe, and is mixed and reacted with the mixed liquid 1 entering from the first conical nozzle in the gas-liquid high-efficiency mixing reaction tube. The absorption rich liquid formed by the reaction is discharged through the absorption rich liquid outlet into the absorption rich liquid buffer container, and the flue gas after the reaction is discharged from the high-efficiency gas-liquid rheology reactor through the flue gas outlet.

9. The high-efficiency industrial solid waste coupled absorbent absorption-solidification CO2 recycling system according to claim 8 is characterized in that: The high-efficiency liquid-liquid regeneration rheological reactor comprises a liquid-liquid regeneration rheological reaction tower and a liquid-liquid high-efficiency mixing reaction tube arranged on the upper part of the liquid-liquid regeneration rheological reaction tower; The upper part of the liquid-liquid regeneration rheological reaction tower is provided with an industrial solid waste slurry inlet, and the lower part is provided with a solid-liquid mixed liquid outlet connected to the solid-liquid mixed liquid buffer container; The liquid-liquid high-efficiency mixing reaction tube comprises a second cylindrical tube section, a second conical nozzle coaxially arranged in the second cylindrical tube section, a second air inlet pipe tangentially connected to the second cylindrical tube section, a first lateral liquid inlet tangentially connected to the second cylindrical tube section, a second lateral liquid inlet tangentially connected to the second cylindrical tube section, a second throat section connected to the second cylindrical tube section, and a second diffusion tube section connected to the second throat section, wherein the second air inlet pipe is connected to an external air environment; The second lateral liquid inlet is used to add liquid alkali into the liquid-liquid high-efficiency mixing reaction tube, and the mixed liquid 1 delivered by the absorption rich liquid circulation pump, the mixed liquid 2 delivered by the solid-liquid mixed liquid circulation pump, the liquid alkali from the second lateral liquid inlet and the air sucked into the second air inlet pipe react in the liquid-liquid high-efficiency mixing reaction tube, and the solid-liquid mixed liquid after the reaction is discharged through the solid-liquid mixed liquid outlet into the solid-liquid mixed liquid buffer container.

10. The high-efficiency industrial solid waste coupled absorbent absorption-solidification CO2 recycling system according to claim 9 is characterized in that: The outlet end of the absorption rich liquid buffer container is connected to the absorption rich liquid circulation pump, and the output end of the absorption rich liquid circulation pump is connected in parallel with a first circulation pipe and a first delivery pipe, the first circulation pipe is connected to the first conical nozzle of the gas-liquid high-efficiency mixing reaction tube, and the first delivery pipe is connected to the first lateral liquid inlet of the liquid-liquid high-efficiency mixing reaction tube; The outlet end of the solid-liquid mixed liquid cache container is connected to the solid-liquid mixed liquid circulation pump, and the output end of the solid-liquid mixed liquid circulation pump is connected in parallel with a second circulation pipe and a second delivery pipe, the second circulation pipe is connected to the second conical nozzle of the liquid-liquid high-efficiency mixing reaction tube, and the second delivery pipe is connected to the solid-liquid separation tank; Valves are provided on the first circulation pipe, the first delivery pipe, the second circulation pipe and the second delivery pipe; The upper part of the solid-liquid separation tank is provided with a regeneration liquid outlet connected to the regeneration absorption liquid buffer container, and the lower part is provided with a slag discharge port; the regeneration liquid outlet is connected to the regeneration liquid inlet of the high-efficiency gas-liquid rheology reactor.

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