CN211896819U - Coal supercritical water gasification hydrogen production and solid-liquid residue harmless treatment system - Google Patents
Coal supercritical water gasification hydrogen production and solid-liquid residue harmless treatment system Download PDFInfo
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Abstract
The utility model discloses a coal supercritical water gasification hydrogen manufacturing and remaining innocent treatment system of solid-liquid, the system includes buggy preprocessing unit, oxygen supply unit, supercritical water gasification unit, supercritical water heat combustion unit and cooling water unit. The inseparable coupling of this system supercritical water gasification reaction and supercritical water heat combustion reaction, utilize supercritical water heat combustion reaction to the organic matter degradation quick, high efficiency and thoroughness are to coal supercritical water gasification hydrogen production produced incomplete thick liquids in-process directly step up and loopback and carry out innocent treatment, the product separation technique of system has synthesized the energy utilization that has realized gas-liquid-solid three-phase product among the gasification reaction process, and simultaneously, produced a large amount of heats provide inside heat source for supercritical water gasification reaction among the supercritical water heat combustion reaction process, the high temperature internal heat type supercritical water gasification of coal has been realized, the use of outside heat source has been reduced, the system economy has been improved.
Description
Technical Field
The utility model belongs to the technical field of energy and environmental protection, in particular to coal supercritical water gasification hydrogen manufacturing and remaining innocent treatment system of solid-liquid.
Background
The exploitation and use of fossil energy in large quantities seriously jeopardizes the sustainable development of ecosystems, and a novel, safe, reliable and clean sustainable development energy system must be urgently sought. The hydrogen energy is used as a clean, high-heat-value, storable and renewable high-quality energy source, is widely applied in the fields of chemical industry, aerospace, automobiles and the like, and has attracted the attention of scholars on how to adopt a proper method to prepare the hydrogen energy in an efficient and environment-friendly manner. China is one of countries using coal as a main energy source, and the preparation of hydrogen by using coal as a raw material can solve the problems of environmental pollution and ecological damage caused by coal utilization and realize energy utilization of coal.
The currently common method for producing hydrogen from coal mainly comprises coal gasification hydrogen production, namely, synthesis gas is prepared by partial oxidation-gasification reaction of coal in air. However, the conventional coal gasification technology exists for producing hydrogenLow efficiency and inevitable generation of large amounts of SOx、NOxSecondary pollution caused by heavy metal pollutants and the like, poor economic benefit and the like, and the rapid and healthy development of the technology is severely restricted. The supercritical water gasification (SCWG) technology is a novel gasification hydrogen production technology proposed by professor Modell of the institute of technology and technology of Massachusetts in the 70 th 20 th century, and means that by using the special properties (low dielectric constant and high solubility) of supercritical water (temperature is more than 374.1 ℃ and pressure is more than 22.1 MPa), the supercritical water is used as a reaction medium, coal quickly and efficiently carries out homogeneous gasification reaction in the supercritical water, and carbon and hydrogen elements in the coal are directly gasified and converted into CO2And H2While part of the supercritical water will also be hydrolyzed to H2N, S, heavy metals and other elements contained in the coal are mineralized and deposited in solid-phase residues at the bottom of the reactor. Compared with the traditional coal gasification hydrogen production technology, the supercritical water gasification hydrogen production technology has the technical advantages of rapid reaction, high gasification efficiency, high hydrogen production rate, strong adaptability of coal types, no secondary pollution, high economy and the like.
However, when the coal supercritical water gasification technology is used for preparing hydrogen, the following problems exist:
(1) after coal is subjected to supercritical water gasification hydrogen production reaction, the generated high-temperature residual slurry also contains a certain amount of organic substances, and if the residual slurry is not properly treated or directly discharged after the reaction, the serious environmental pollution problem is caused.
(2) Supercritical water gasification of coal is a high-temperature high-pressure reduction reaction, fresh normal-temperature coal is difficult to directly preheat to reaction temperature by using high-temperature fluid after the gasification reaction, and the coal is heated or supplemented to the temperature required by the gasification reaction by directly using an external heating source or an auxiliary external heat source, so that the equipment investment cost of a system can be increased, and the operating cost of the system can also be increased.
Disclosure of Invention
In order to overcome above-mentioned prior art's shortcoming, the utility model aims to provide a coal supercritical water gasification hydrogen manufacturing and remaining innocent treatment system of solid-liquid closely combine supercritical water gasification reaction and supercritical water heat combustion reaction, can realize the thorough innocent treatment of organic pollutant in the produced incomplete thick liquid of supercritical water gasification reaction process high-efficiently, reduce the required energy consumption of high temperature high pressure supercritical water gasification reaction effectively, and simultaneously, the resource utilization of the produced gas-liquid solid three-phase product of coal supercritical water gasification reaction and thick liquid supercritical water heat combustion reaction has been realized.
In order to realize the purpose, the utility model discloses a technical scheme is:
a coal supercritical water gasification hydrogen production and solid-liquid residue harmless treatment system comprises:
the coal powder pretreatment unit comprises a coal slurry mixing tank 1, wherein the outlet of the coal slurry mixing tank 1 is connected with the inlet of a high-pressure coal slurry pump 2, and the outlet of the high-pressure coal slurry pump 2 is connected with the inlet of an inner pipe of a preheater 3;
an oxygen supply unit comprising an air separation unit 13 and an oxygen compressor 14 connected in series
The supercritical water gasification unit comprises a supercritical water gasification reactor 4a, wherein the inlet of the supercritical water gasification reactor 4a is connected with the outlet of an inner pipe of the preheater 3, the outlet of the supercritical water gasification reactor is connected with the inlet of an outer pipe of the preheater 3, the outlet of the outer pipe of the preheater 3 is connected with the inlet of a pressure regulating device 5, the outlet of the pressure regulating device 5 is connected with the inlet of a gas-liquid separator 6, and the gas-phase outlet of the gas-liquid separator 6 is connected with the;
supercritical water heat combustion unit, including booster pump 8, 6 liquid phase outlets of gas-liquid separator link to each other with 8 imports of booster pump, 8 exports of booster pump link to each other with 9 inner tube imports of residual slurry preheater, 9 inner tube exports of residual slurry preheater link to each other with supercritical water heat combustion reactor 4b material entry, 14 exports of oxygen compressor link to each other with supercritical water heat combustion reactor 4b oxidant entry, 4b liquid phase outlets of supercritical water heat combustion reactor are linked to each other with supercritical water gasification reactor 4a, 4b residual slurry outlets of supercritical water heat combustion reactor are linked to each other with 9 outer tube imports of residual slurry preheater, 9 outer tube exports of residual slurry preheater link to each other with heat exchange tube import in the coal slurry blending tank 1, heat exchange tube export in the coal slurry blending tank 1 links to each other with 10 inner tube imports of waste heat recoverer, 10 inner tube exports link to each other with pressure reduction gear 11 import, pressure reduction, a liquid phase outlet of the gas-liquid-solid three-phase separator 12 is connected with a reuse water inlet of the coal slurry blending tank 1;
the cooling water unit comprises a cooling water tank 15 and a cooling water pump 16 which are sequentially connected, the outlet of the cooling water pump 16 is divided into two paths, one path is connected with the cooling water inlet of the supercritical water hot combustion reactor 4b, and the cooling water outlet is positioned at the bottom of the supercritical water gasification reactor 4 a; the other path is connected with an inlet of an outer pipe of the waste heat recoverer 10, and an outlet of the outer pipe of the waste heat recoverer 10 generates steam.
The coal slurry blending tank 1 is internally provided with a stirrer which adopts a frame type stirrer, an anchor type stirrer, a blade paddle stirrer, a turbine stirrer or a helical ribbon type stirrer.
The coal slurry blending tank 1 is internally provided with a heat exchanger which adopts a coil pipe heat exchanger.
The preheater 3, the residual slurry preheater 9 and the waste heat recoverer 10 adopt a double-pipe heat exchanger, a shell-and-tube heat exchanger or a spiral coil heat exchanger.
Supercritical water gasification reactor 4a and supercritical water heat burning reactor 4b are tubular or kettle-type reactor, and the outer wall surface of the reactor carries out wall temperature control through cooling water.
The pressure regulating device 5 and the pressure reducing device 11 are capillary tube pressure reducers, pressure regulating valves, back pressure valves or multi-stage valve linkage pressure reducing.
The gas-liquid separator 6 and the gas-liquid-solid three-phase separator 12 adopt efficient separators under the condition of pressure or normal pressure.
The utility model also provides a processing method based on coal supercritical water gasification hydrogen manufacturing and remaining innocent treatment system of solid-liquid, including following step:
1, adding coal powder and water into a coal slurry mixing tank 1, uniformly mixing and primarily preheating to 80-90 ℃;
2, pressurizing the coal slurry to a supercritical pressure of 24-27 MPa by using a high-pressure coal slurry pump 2, and conveying the coal slurry to an inner pipe of a preheater 3 for secondary preheating;
3, the coal slurry after being boosted and preheated is subjected to supercritical water gasification reaction in a supercritical water gasification reactor 4a, and the residual heat required in the supercritical water gasification reaction process comes from the heat generated by the hydrothermal combustion reaction in a supercritical water thermal combustion reactor 4 b;
4, fluid after supercritical water gasification reaction firstly enters an outer pipe of a preheater 3 to preheat high-pressure coal slurry, the fluid after reaction is also cooled at the same time, the cooled high-pressure fluid enters a pressure regulating device 5 to be depressurized, the fluid after depressurization enters a pressurized gas-liquid separator 6 to be separated into gas and liquid phases, a separated gas-phase product enters a gas-phase separation module 7, and a separated liquid-phase product enters a booster pump 8 to be pressurized to supercritical pressure, namely 24-27 MPa;
5, the pressurized material enters an inner pipe of a residual slurry preheater 9, is preheated to 400-500 ℃ by hot fluid of an outer pipe, and then enters a supercritical water-heating combustion reactor 4b together with oxygen from an air separation device 13 and boosted to 24-27 MPa by an oxygen compressor 14 to generate a hydrothermal combustion reaction, so that the slurry is subjected to harmless treatment;
6, the temperature of the high-temperature high-pressure liquid phase product after reaction is 750-1000 ℃, the high-temperature high-pressure liquid phase product enters a supercritical water gasification reactor 4a to provide enough heat for the supercritical water gasification hydrogen production reaction of coal powder, meanwhile, the concentrated slurry after being burned out through hydrothermal combustion is separated from the liquid phase product to a certain degree in a supercritical water heat combustion reactor 4b, and enters an outer pipe of a residual slurry preheater 9 to provide certain heat for preheating of slurry, meanwhile, the high-temperature concentrated slurry after reaction is cooled, the residual heat firstly enters a coal slurry blending tank 1 to preheat fresh coal powder, then enters a waste heat recoverer 10, tap water from a cooling water tank 15 and a cooling water pump 16 is heated to generate steam for power generation of a factory, the cooled high-pressure concentrated slurry enters a pressure reducing device 11 to reduce the pressure, the concentrated slurry after temperature and pressure reduction is subjected to high-efficiency separation of gas phase, liquid phase and solid phase in a three-phase separator 12, the removal rate of organic matters in the separated liquid-phase product can reach more than 99.9 percent, the organic matters are used as reuse water to directly enter a coal slurry blending tank 1 for blending coal powder, and the separated gas-phase product CO is used as2Is recovered and used in factory, and the separated solid phase product is mainly residue after reaction, in which heavy metal ions are mineralized and deposited in stable residue.
The high-pressure coal slurry is preheated to 300-400 ℃ in an inner pipe of the preheater 3 through hot fluid in an outer pipe, the hot fluid in the outer pipe of the preheater 3 is derived from fluid after high-temperature and high-pressure reaction in the supercritical water gasification reactor 4a, the temperature is 650-800 ℃, and the hot fluid in the outer pipe of the residual slurry preheater 9 is derived from a product after reaction in the supercritical water combustion reactor 4 b.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses a coal supercritical water gasification hydrogen manufacturing and remaining innocent treatment system of solid-liquid, inseparable supercritical water gasification reaction and supercritical water heat combustion reaction of having combined, coal carries out the product separation back through the incomplete thick liquid behind supercritical water gasification hydrogen manufacturing reaction, with remaining thick liquids that contain organic substance directly step up and loopback carry out hydrothermal combustion reaction in supercritical water heat combustion reactor, supercritical water heat combustion reaction can degrade organic substance for CO high efficiency in reaction time several seconds2、N2、H2O and the like, and the heavy metal is mineralized and deposited in the stable solid phase residue, so that the harmless treatment of the whole coal supercritical water gasification hydrogen production system is thoroughly realized.
Further, the residual slurry can release a large amount of heat during the supercritical water heat combustion reaction, the utility model discloses the reactor of coupling supercritical water gasification reaction and supercritical water heat combustion reaction can realize the ultra-high-temperature interior hot type gasification reaction of coal, and required high temperature is provided by the produced heat of hydrothermal combustion reaction among the gasification reaction process promptly, has avoided the use of extra heat source, and the heat that remains simultaneously still can realize waste heat recovery according to the form of energy step, has improved the economic nature of system.
Further, the utility model discloses an adopt the result separation technique step by step, at first utilized the solubility difference of each component between the gas component to separate coal supercritical water gasification back gaseous phase result H high-efficiently2、CH4、CO、CO2Then the organic substances in the residual slurry are further converted into harmless CO through supercritical water heat combustion reaction2Can straightenConnect back H for system2And O and the stabilized solid-phase residue which can be used for preparing ceramsite by making bricks, so that the comprehensive energy utilization of the gas-liquid-solid three-phase product generated by the hydrogen production by supercritical water gasification of coal is realized at one time.
Drawings
Fig. 1 is a schematic diagram of the system structure of the present invention.
In the figure: 1-a coal slurry blending tank; 2-high pressure coal slurry pump; 3-a preheater; 4 a-supercritical water gasification reactor; 4 b-supercritical hydrothermal combustion reactor; 5-a pressure regulating device; 6-gas-liquid separator; 7-a gas phase separation module; 8-a booster pump; 9-residual pulp preheater; 10-a waste heat recoverer; 11-a pressure reduction device; 12-gas-liquid-solid three-phase separator; 13-an air separation plant; 14-an oxygen compressor; 15-cooling the water tank; 16-Cooling Water Pump.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and a specific embodiment.
Referring to fig. 1, a coal supercritical water gasification hydrogen production and solid-liquid residue harmless treatment system is characterized by comprising a coal powder pretreatment unit, an oxygen supply unit, a supercritical water gasification unit, a supercritical water heat combustion unit and a cooling water unit.
In this system, the connection of the devices is as follows:
the coal powder pretreatment unit comprises a coal slurry mixing tank 1, wherein the outlet of the coal slurry mixing tank 1 is connected with the inlet of a high-pressure coal slurry pump 2, and the outlet of the high-pressure coal slurry pump 2 is connected with the inlet of an inner pipe of a preheater 3;
an oxygen supply unit comprising an air separation unit 13 and an oxygen compressor 14 connected in series
The supercritical water gasification unit comprises a supercritical water gasification reactor 4a, wherein the inlet of the supercritical water gasification reactor 4a is connected with the outlet of an inner pipe of the preheater 3, the outlet of the supercritical water gasification reactor is connected with the inlet of an outer pipe of the preheater 3, the outlet of the outer pipe of the preheater 3 is connected with the inlet of a pressure regulating device 5, the outlet of the pressure regulating device 5 is connected with the inlet of a gas-liquid separator 6, and the gas-phase outlet of the gas-liquid separator 6 is connected with the;
supercritical water heat combustion unit, including booster pump 8, 6 liquid phase outlets of gas-liquid separator link to each other with 8 imports of booster pump, 8 exports of booster pump link to each other with 9 inner tube imports of residual slurry preheater, 9 inner tube exports of residual slurry preheater link to each other with supercritical water heat combustion reactor 4b material entry, 14 exports of oxygen compressor link to each other with supercritical water heat combustion reactor 4b oxidant entry, 4b liquid phase outlets of supercritical water heat combustion reactor are linked to each other with supercritical water gasification reactor 4a, 4b residual slurry outlets of supercritical water heat combustion reactor are linked to each other with 9 outer tube imports of residual slurry preheater, 9 outer tube exports of residual slurry preheater link to each other with heat exchange tube import in the coal slurry blending tank 1, heat exchange tube export in the coal slurry blending tank 1 links to each other with 10 inner tube imports of waste heat recoverer, 10 inner tube exports link to each other with pressure reduction gear 11 import, pressure reduction, a liquid phase outlet of the gas-liquid-solid three-phase separator 12 is connected with a reuse water inlet of the coal slurry blending tank 1;
the cooling water unit comprises a cooling water tank 15 and a cooling water pump 16 which are sequentially connected, the outlet of the cooling water pump 16 is divided into two paths, one path is connected with the cooling water inlet of the supercritical water hot combustion reactor 4b, and the cooling water outlet is positioned at the bottom of the supercritical water gasification reactor 4 a; the other path is connected with an inlet of an outer pipe of the waste heat recoverer 10, and an outlet of the outer pipe of the waste heat recoverer 10 generates steam.
The coal slurry blending tank 1 is internally provided with a stirrer which adopts a frame type stirrer, an anchor type stirrer, a blade paddle stirrer, a turbine stirrer or a helical ribbon type stirrer.
The coal slurry blending tank 1 is internally provided with a heat exchanger which adopts a coil pipe heat exchanger.
The preheater 3, the residual slurry preheater 9 and the waste heat recoverer 10 adopt a double-pipe heat exchanger, a shell-and-tube heat exchanger or a spiral coil heat exchanger.
Supercritical water gasification reactor 4a and supercritical water heat burning reactor 4b are tubular or kettle-type reactor, and the outer wall surface of the reactor carries out wall temperature control through cooling water.
The pressure regulating device 5 and the pressure reducing device 11 are capillary tube pressure reducers, pressure regulating valves, back pressure valves or multi-stage valve linkage pressure reducing.
The gas-liquid separator 6 and the gas-liquid-solid three-phase separator 12 adopt efficient separators under the condition of pressure or normal pressure.
Example 1:
the embodiment takes supercritical water gasification of coal dust to produce hydrogen as an example, and describes a harmless treatment and energy utilization system of the coal dust in detail:
firstly, the harmless treatment and energy utilization system of the pulverized coal is gradually filled with water, boosted and heated, the system is started and stably operated for a certain time.
And then switching pulverized coal materials, adding required pulverized coal and a small amount of water into the coal slurry mixing tank 1, uniformly mixing the coal slurry in the coal slurry mixing tank 1 by using a stirrer, and simultaneously carrying out primary preheating (80-90 ℃) on the coal slurry through high-temperature supercritical hydrothermal combustion products in a coil pipe in the coal slurry mixing tank 1. And then pressurizing the uniform coal slurry to a supercritical pressure (24-27 MPa) through a high-pressure coal slurry pump 2, conveying the uniform coal slurry to an inner pipe of a preheater 3, and carrying out secondary preheating on the coal slurry, wherein the high-pressure coal slurry is preheated to a certain temperature (300-400 ℃) in the inner pipe of the preheater 3 through hot fluid in an outer pipe, and the hot fluid in the outer pipe of the preheater 3 comes from high-temperature high-pressure reaction fluid (650-800 ℃) in a supercritical water gasification reactor 4 a. The coal slurry after boosting and preliminary preheating is subjected to supercritical water gasification reaction in the supercritical water gasification reactor 4a, and the residual heat required in the supercritical water gasification reaction process comes from a large amount of heat generated by the hydrothermal combustion reaction in the supercritical water thermal combustion reactor 4 b. Fluid after supercritical water gasification reaction firstly enters an outer pipe of a preheater 3 to preheat high-pressure coal slurry, the fluid is cooled to a certain degree after the reaction, the cooled high-pressure fluid enters a pressure regulating device 5 to reduce the pressure to a certain degree, the fluid enters a gas-liquid separator 6 with pressure after the pressure reduction is finished to separate gas from liquid, and the separated gas-phase product mainly comprises H2（60~75%）、CH4、CO2And CO and the like, and enabling the gas-phase product to enter a subsequent gas-phase separation module 7, and performing efficient separation and subsequent recycling of gas components by using the solubility difference among the gas-phase components. The separated liquid phase product is mainly slurry containing carbon residue, ash content and the like, and then enters the subsequent supercritical water heat combustionAnd the burning module carries out thorough harmless treatment.
The slurry containing carbon residue, ash and the like directly enters a booster pump 8 to be pressurized to supercritical pressure (24-27 MPa), the pressurized material enters an inner pipe of a residual slurry preheater 9 and is preheated to (400-500 ℃) by outer pipe hot fluid, and the hot fluid in the outer pipe of the heat regenerator comes from a reaction product in a supercritical water heat combustion reactor 4 b. The slurry after pressure boosting and preheating and oxygen from the air separation device 13 and after being boosted by the oxygen compressor 14 (24-27 MPa) enter the supercritical water heat combustion reactor 4b together to perform hydrothermal combustion reaction, so that harmless treatment of the slurry is performed. The reacted high-temperature high-pressure liquid phase product (750-1000 ℃) enters a supercritical water gasification reactor 4a to provide enough heat for the supercritical water gasification hydrogen production reaction of the coal powder. Meanwhile, the concentrated slurry burned out by hydrothermal combustion is separated from the liquid phase product to a certain degree in a supercritical hydrothermal combustion reactor 4b and enters an outer pipe of a residual slurry preheater 9 to provide certain heat for preheating slurry, meanwhile, the concentrated slurry after high-temperature reaction is cooled to a certain degree, then the residual heat firstly enters the inside of a coil pipe in a coal slurry blending tank 1 to preheat fresh coal powder and then enters a waste heat recoverer 10 to heat tap water from a cooling water tank 15 and a cooling water pump 16 and generate steam for power generation of a factory, the cooled high-pressure concentrated slurry enters a pressure reduction device 11 to be subjected to appropriate pressure reduction, the concentrated slurry after the temperature and pressure reduction is subjected to subsequent three-phase separator 12 to carry out high-efficiency separation of gas, liquid and solid phases, the removal rate of organic matters in the separated liquid phase product can reach more than 99.9, and the concentrated slurry is used as recycle water to directly enter the coal slurry blending tank 1 to be subjected to coal powder blending, separated gas phase product CO2The separated solid-phase product is mainly residue after reaction, wherein heavy metal ions are mineralized and deposited in the stable residue, so that the thorough harmless treatment of concentrated-phase slurry generated by supercritical water gasification of pulverized coal and the resource utilization of gas-liquid-solid three-phase products are realized.
To sum up, the utility model discloses the inseparable coupling of system supercritical water gasification reaction and supercritical water heat combustion reaction, utilize supercritical water heat combustion reaction to organic matter degradation quick, high efficiency and thoroughness are to the produced residual slurry of coal supercritical water gasification hydrogen manufacturing in-process directly step up and loopback and carry out innocent treatment, the product separation technique of system has synthesized the energy utilization that has realized gas-liquid-solid three-phase product among the gasification reaction process, and simultaneously, produced a large amount of heats provide inside heat source for supercritical water gasification reaction among the supercritical water heat combustion reaction process, the high temperature internal heat type supercritical water gasification of coal has been realized, the use of outside heat source has been reduced, the system economy nature has been improved.
The above contents are only for explaining the technical idea of the present invention, and the protection scope of the present invention cannot be limited thereby, and any modification, equivalent replacement, improvement, etc. made on the basis of the technical solution according to the technical idea of the present invention are all within the protection scope of the claims of the present invention.
Claims (7)
1. The utility model provides a coal supercritical water gasification hydrogen manufacturing and remaining innocent treatment system of solid-liquid which characterized in that includes:
the coal powder pretreatment unit comprises a coal slurry blending tank (1), wherein the outlet of the coal slurry blending tank (1) is connected with the inlet of a high-pressure coal slurry pump (2), and the outlet of the high-pressure coal slurry pump (2) is connected with the inlet of an inner pipe of a preheater (3);
an oxygen supply unit comprising an air separation unit (13) and an oxygen compressor (14) connected in series
The supercritical water gasification unit comprises a supercritical water gasification reactor (4 a), wherein the inlet of the supercritical water gasification reactor (4 a) is connected with the outlet of an inner pipe of a preheater (3), the outlet of the supercritical water gasification reactor is connected with the inlet of an outer pipe of the preheater (3), the outlet of the outer pipe of the preheater (3) is connected with the inlet of a pressure regulating device (5), the outlet of the pressure regulating device (5) is connected with the inlet of a gas-liquid separator (6), and the gas-phase outlet of the gas-liquid separator (6) is connected with the inlet of a gas-;
supercritical water heat combustion unit, including booster pump (8), gas-liquid separator (6) liquid phase export links to each other with booster pump (8) import, booster pump (8) export links to each other with incomplete thick liquid pre-heater (9) inner tube import, incomplete thick liquid pre-heater (9) inner tube export links to each other with supercritical water heat combustion reactor (4 b) material entry, oxygen compressor (14) export links to each other with supercritical water heat combustion reactor (4 b) oxidant entry, supercritical water heat combustion reactor (4 b) liquid phase export links to each other with supercritical water gasification reactor (4 a), supercritical water heat combustion reactor (4 b) incomplete thick liquid export links to each other with incomplete thick liquid pre-heater (9) outer tube import, incomplete thick liquid pre-heater (9) outer tube export links to each other with heat exchange tube import in coal thick liquid allotment jar (1), heat exchange tube export links to each other with waste heat recovery ware (10) inner tube import in coal thick liquid allotment jar (1), an outlet of an inner pipe of the waste heat recoverer (10) is connected with an inlet of a pressure reduction device (11), an outlet of the pressure reduction device (11) is connected with an inlet of a gas-liquid-solid three-phase separator (12), and a liquid phase outlet of the gas-liquid-solid three-phase separator (12) is connected with a reuse water inlet of the coal slurry blending tank (1);
the cooling water unit comprises a cooling water tank (15) and a cooling water pump (16) which are sequentially connected, the outlet of the cooling water pump (16) is divided into two paths, one path is connected with the cooling water inlet of the supercritical water heat combustion reactor (4 b), and the cooling water outlet is positioned at the bottom of the supercritical water gasification reactor (4 a); the other path is connected with an inlet of an outer pipe of the waste heat recoverer (10), and an outlet of the outer pipe of the waste heat recoverer (10) generates steam.
2. The system for hydrogen production and harmless treatment of solid-liquid residue through supercritical water gasification of coal according to claim 1, wherein a stirrer is arranged in the coal slurry blending tank (1), and the stirrer is a frame stirrer, an anchor stirrer, a blade paddle stirrer, a turbine stirrer or a helical ribbon stirrer.
3. The system for hydrogen production and harmless treatment of solid-liquid residue through supercritical water gasification of coal according to claim 1 or 2, characterized in that a heat exchanger is arranged in the coal slurry blending tank (1), and the heat exchanger is a coil heat exchanger.
4. The system for hydrogen production and harmless treatment of solid-liquid residue through supercritical water gasification of coal according to claim 1, wherein the preheater (3), the residual slurry preheater (9) and the waste heat recovery device (10) adopt a double-pipe heat exchanger, a shell-and-tube heat exchanger or a spiral coil heat exchanger.
5. The coal supercritical water gasification hydrogen production and solid-liquid residue harmless treatment system according to claim 1, wherein the supercritical water gasification reactor (4 a) and the supercritical water heat combustion reactor (4 b) are tubular or kettle type reactors, and the wall temperature of the outer wall surface of the reactors is controlled by cooling water.
6. The coal supercritical water gasification hydrogen production and solid-liquid residue harmless treatment system according to claim 1, wherein the pressure regulating device (5) and the pressure reduction device (11) are capillary pressure reducers, pressure regulating valves, back pressure valves or multi-stage valve linkage pressure reduction.
7. The system for hydrogen production and harmless treatment of solid-liquid residue through supercritical water gasification of coal according to claim 1, wherein the gas-liquid separator (6) and the gas-liquid-solid three-phase separator (12) are efficient separators under pressure or normal pressure.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685811A (en) * | 2021-08-31 | 2021-11-23 | 武汉武锅能源工程有限公司 | Supercritical hydrothermal combustion composite thermal fluid generation platform |
| CN115013102A (en) * | 2022-04-26 | 2022-09-06 | 成都科衡环保技术有限公司 | Coal clean utilization thermodynamic system and operation method thereof |
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2020
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113685811A (en) * | 2021-08-31 | 2021-11-23 | 武汉武锅能源工程有限公司 | Supercritical hydrothermal combustion composite thermal fluid generation platform |
| CN113685811B (en) * | 2021-08-31 | 2024-04-02 | 武汉武锅能源工程有限公司 | Supercritical hydrothermal combustion composite hot fluid generation platform |
| CN115013102A (en) * | 2022-04-26 | 2022-09-06 | 成都科衡环保技术有限公司 | Coal clean utilization thermodynamic system and operation method thereof |
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