CN114988358A - Zero-emission system for coal-to-hydrogen production and working method - Google Patents
Zero-emission system for coal-to-hydrogen production and working method Download PDFInfo
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- CN114988358A CN114988358A CN202210611898.0A CN202210611898A CN114988358A CN 114988358 A CN114988358 A CN 114988358A CN 202210611898 A CN202210611898 A CN 202210611898A CN 114988358 A CN114988358 A CN 114988358A
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- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
- C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
- C01B3/06—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of inorganic compounds containing electro-positively bound hydrogen, e.g. water, acids, bases, ammonia, with inorganic reducing agents
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- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
Abstract
The invention discloses a coal-to-hydrogen zero emission system and a working method thereof, wherein the system comprises a main reactor, a heat recovery heat exchanger, a three-phase separator, a regeneration reactor and a pulping device; the outlet of the main reactor is sequentially connected with a heat recovery heat exchanger, a cooler and a three-phase separator; a gas phase outlet of the three-phase separator discharges fuel gas, a liquid phase outlet is connected with a pulping device, and a product at a solid outlet is sent to a feeding hole of the regeneration reactor; the regeneration reactor is provided with an air inlet for accessing air and a charging hole for adding limestone, and the outlet product of the regeneration reactor is sent to the main reactor; the pulping device is provided with a raw material inlet for adding coal and a liquid inlet for connecting make-up water, an outlet of the pulping device is connected with a liquid inlet of the heat recovery heat exchanger, and a liquid outlet of the heat recovery heat exchanger is connected with a liquid inlet of the main reactor. The invention reduces the emission of the bad gas in the process of preparing hydrogen from coal, and completes the whole zero emission of the hydrogen prepared from coal.
Description
Technical Field
The invention belongs to the technical field of hydrogen production, and particularly relates to a coal-to-hydrogen zero emission system and a working method.
Background
The energy is an important basis for human civilized survival and development, and the efficient clean utilization of the existing energy and the cooperative utilization among different kinds of energy are favorable for ensuring the long-term energy safety. At present, the challenges of energy situation are very serious, on one hand, the energy safety situation is not optimistic, the energy characteristics of 'rich coal, little oil and gas' cannot be changed in a short period, the dominance of coal use is high, and the supply of oil and natural gas is limited by people; on the other hand, the expression is faced with huge environmental pressure, which forces domestic energy use structure to be transformed, and the external CO 2 The emission reduction task is aggravated, the traditional rough coal use mode has low efficiency, and simultaneously, a large amount of NO is brought x 、SO x 、CO 2 And solid particles are discharged, which causes serious resource waste.
The problem of high-efficient clean utilization of coal is a strategic problem related to the overall energy environment, and the economic barriers caused by the efficiency, the environment and the consideration of the environment of coal utilization must be eliminated step by means of scientific and technical progress and innovation. Firstly, an advanced clean coal power generation technology should be researched, developed, popularized and applied in an effort to improve the proportion of coal converted into electricity and optimize a terminal energy structure; secondly, a clean coal comprehensive utilization technology is promoted, and the coal is simultaneously converted into electricity, gas, liquid fuel and heat, including various products such as chemical products and the like; finally, the obstacle of large-scale and efficient hydrogen production of coal is broken through, the coal is transited to a terminal energy structure taking electricity and hydrogen as main factors, and CO is simultaneously realized in the conversion process 2 Safe disposal of, to zero emissionAnd then.
Hydrogen is a secondary energy, and the product is water during energy conversion, so that zero emission of pollutants can be really realized. Around the preparation, distribution, storage and utilization of hydrogen, many countries make corresponding development and research plans, such as a hydrogen energy plan of a U.S. DOE, a hydrogen energy world energy network plan in a sunlight plan of a Japanese integrated new energy development organization, and the like.
The hydrogen production technology by fossil fuel and the hydrogen production technology by water electrolysis are mature, but the energy conversion efficiency is low, at present, hydrogen is mainly used as a chemical raw material rather than an energy source, and the future in the conception cannot be realized depending on the prior art. To exert the important function of hydrogen on the effective utilization of various primary energy sources, breakthrough must be made in the aspect of large-scale efficient hydrogen production.
In conclusion, the development of clean new energy has become an urgent problem to be solved in the current development.
Disclosure of Invention
In order to solve the problems in the prior art, the invention aims to provide a coal-to-hydrogen zero emission system and a working method, wherein a shift reaction and CO are adopted in the system 2 Absorption of CO produced by absorption reaction or the like 2 . The emission of the undesirable gases is reduced in the process of preparing hydrogen from coal.
In order to achieve the purpose, the invention adopts the following technical means:
a coal-to-hydrogen zero emission system comprises a main reactor, a heat recovery heat exchanger, a three-phase separator, a regeneration reactor and a pulping device;
the outlet of the main reactor is sequentially connected with a heat recovery heat exchanger, a cooler and a three-phase separator; a gas phase outlet of the three-phase separator discharges fuel gas, a liquid phase outlet is connected with a pulping device, and a product at a solid outlet is sent to a feeding hole of the regeneration reactor; the regeneration reactor is provided with an air inlet for accessing air and a charging hole for adding limestone, and the outlet product of the regeneration reactor is sent to the main reactor; the pulping device is provided with a raw material inlet for adding coal and a liquid inlet for connecting make-up water, an outlet of the pulping device is connected with a liquid inlet of the heat recovery heat exchanger, and a liquid outlet of the heat recovery heat exchanger is connected with a liquid inlet of the main reactor.
As a further improvement of the invention, the outlet product of the regeneration reactor is sent to a solid separation device for removing solid waste, and the product of the solid separation device is sent to the main reactor.
As a further improvement of the invention, the liquid phase outlet is connected with the pulping device through a liquid separation device.
As a further development of the invention, the main reactor is an adiabatic reactor.
As a further improvement of the invention, a first preheating unit and a second preheating unit are respectively arranged in front of a feeding port and an air inlet of the regeneration reactor.
As a further improvement of the invention, a third preheating unit is arranged between the liquid outlet of the heat recovery heat exchanger and the liquid inlet of the main reactor, and the first preheating unit and the third preheating unit and the second preheating unit feed materials reversely to form a heat exchange device.
As a further improvement of the invention, a heat exchange unit is also arranged between the heat recovery heat exchanger and the three-phase separator.
As a further improvement of the invention, the outlet of the pulping device is connected with the liquid inlet of the heat recovery heat exchanger through a delivery pump.
As a further development of the invention, the regeneration reactor is provided with a gas line on which a gas line for discharging CO is arranged 2 The gas pipeline is also connected with a gas inlet at the bottom of the regeneration reactor to form a circulating gas circuit.
A working method of a coal-to-hydrogen zero emission system comprises the following steps:
the CaO of the main reactor and the coal slurry react to generate a product, and the product enters a three-phase separator to obtain hydrogen, water and solid;
coal and water form coal slurry in a slurry preparation device, and the coal slurry enters a heat recovery heat exchanger and exchanges heat with a product of a main reactor; then entering a main reactor;
the hydrogen separated by the three-phase separator is used as fuel gas, and the main component of the solid is CaCO 3 Ash and unconverted char, the solid product is fed to a regeneration reactor where limestone, air and solids from the three-phase separator are reacted to form CO 2 And CaO, the solid waste which is not fully utilized is discharged, and the generated CaO is sent into the main reactor again to complete the whole coal-to-hydrogen zero emission system.
The coal hydrogen production technology can convert the chemical energy contained in coal into the internal energy of a gas product through gasification reaction, and compared with the prior art, the coal hydrogen production technology has the following beneficial effects:
the system of the invention separates hydrogen (H) into hydrogen in a three-phase separator 2 ) Water (H) 2 O) and solids, the hydrogen produced being used as fuel gas, the solids having a major component of CaCO 3 Ash and unconverted char, this part of the solid product being fed to a regeneration reactor 9 in which limestone, air and the solids of the three-phase separator are formed into CO 2 And CaO, the solid waste which is not fully utilized is discharged, and the generated CaO is sent into the main reactor again to complete the whole coal-to-hydrogen zero emission system. Supercritical water is used as a hydrogen production medium, so that the drying process of pulverized coal can be omitted, the energy consumption of the hydrogen production process is reduced, and the system efficiency is improved; because the supercritical water has high solubility to organic matters, a homogeneous or quasi-homogeneous hydrogen production reaction environment can be formed, pyrolysis and extraction are integrated, the hydrogen production reaction is convenient to carry out, and the conversion rate is improved to a certain extent; the water is used as a reaction medium, so that the hydrogen production reaction is favorably carried out in the direction of generating hydrogen, and the water is low in cost, easy to obtain and free from environmental pollution; all reactions are carried out in the same container, so that the cost is saved, gas-liquid solid phases in products are easy to separate, and the process flow is simple. Therefore, the supercritical water coal gasification hydrogen production technology can be matched with the chemical industry, so that the flow of related processes is simplified, pollutants generated by the traditional coal-fired power generation technology can be eliminated from the source, the energy conversion efficiency is further improved, and the supercritical water coal gasification hydrogen production technology can be combined with organic waste treatment and operation costLow in use and high in return on investment, and is a revolutionary technology. The invention generates only carbon dioxide (CO) as an environmentally influential gas 2 ) And no other harmful gas is generated, and zero pollution to the environment is realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art are briefly introduced below; it is obvious that the drawings in the following description are some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.
Fig. 1 is a schematic diagram of a coal-to-hydrogen zero emission system and an operating method according to an embodiment of the invention;
FIG. 2 is a hydrogen production process according to an embodiment of the present invention.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The invention provides a coal-to-hydrogen zero emission system, which comprises a main reactor 1, a heat recovery heat exchanger 2, a three-phase separator 4, a regeneration reactor 9 and a pulping device 6, wherein the main reactor is connected with the heat recovery heat exchanger;
the outlet of the main reactor 1 is sequentially connected with a heat recovery heat exchanger 2, a cooler and a three-phase separator 4; a gas phase outlet of the three-phase separator 4 discharges fuel gas, a liquid phase outlet is connected with the pulping device 6, and a product at a solid outlet is sent to a feeding hole of the regeneration reactor 9; the regeneration reactor 9 is provided with an air inlet for accessing air and a charging port for adding limestone, and the outlet product of the regeneration reactor 9 is sent to the main reactor 1; the pulping device 6 is provided with a raw material inlet for adding coal and a liquid inlet for connecting make-up water, an outlet of the pulping device 6 is connected with a liquid inlet of the heat recovery heat exchanger 2, and a liquid outlet of the heat recovery heat exchanger 2 is connected with a liquid inlet of the main reactor 1.
In the main reactor 1, the coal slurry is mixed with CaO to generate hydrogen (H) 2 ) Water (H) 2 O) and part of the solid, and carry higher waste heat; the products generated by the main reactor 1 enter the heat recovery heat exchanger 2 and the cooler in sequence to reduce the temperature. In the three-phase separator 4, hydrogen (H) is separated 2 ) Water (H) 2 O) and solids, the hydrogen produced being used as fuel gas, the solids being based on CaCO 3 Ash and unconverted char, this part of the solid product being fed to a regeneration reactor 9, limestone, air and the solids of the three-phase separator 4 being formed into CO in the regeneration reactor 9 2 And CaO, the solid waste which is not fully utilized is discharged, and the generated CaO is sent into the main reactor 1 again to complete the whole coal-to-hydrogen zero emission system.
The invention is described in further detail below with reference to the following figures and examples:
referring to fig. 1, a zero emission system for hydrogen production from coal according to an embodiment of the present invention mainly includes a main reactor 1 and a regeneration reactor 9, wherein the main reactor 1 mainly includes a first reactor, a second reactor, and a third reactorPromoting the gasification reaction and CO 2 Is mainly subjected to CO in the regeneration reactor 9 2 The regeneration recombination reaction of (1).
The main components of the system are a main reactor 1, a heat recovery heat exchanger 2, a three-phase separator 4, a regeneration reactor 9, a pulping device 6 and the like. The outlet of the main reactor 1 is sequentially connected with a heat recovery heat exchanger 2, a cooler and a three-phase separator 4, a gas phase outlet of the three-phase separator 4 discharges fuel gas, a liquid phase outlet is connected with a pulping device 6 after waste water is removed through a liquid separation device 7, a solid product is sent to a regeneration reactor 9, an air inlet of the regeneration reactor 9 is connected with air, limestone is added into a charging hole, an outlet product is sent to a solid separation device 8, and the outlet product is sent to the main reactor 1 after solid waste is removed. Coal is added into a raw material inlet of the pulping device 6, make-up water is connected into a liquid inlet, an outlet is connected with a liquid inlet of the heat recovery heat exchanger 2, and a liquid outlet of the heat recovery heat exchanger 2 is connected with a liquid inlet of the main reactor 1.
The coal-to-hydrogen zero emission system consists of two reactors and a heat recovery heat exchanger 2 for heat exchange, and the specific components comprise: the system comprises a main reactor 1, a heat recovery heat exchanger 2, a three-phase separator 4, a regeneration reactor 9, a pulping device and the like. Depending on the manner of heat supply to the regenerative reactor 9, the conversion of the char, the method of feeding, etc., different systems may be formed.
In the system, coal, make-up water and water from a three-phase separator 4 enter a pulping device 6 for pulping, and the generated coal slurry enters a heat recovery heat exchanger 2 under the action of a pump to absorb the waste heat from main reaction products.
In the main reaction, the coal slurry reacts with CaO to generate hydrogen (H) 2 ) Water (H) 2 O) and part of the solid, and carry higher waste heat; products generated by the main reactor 1 enter the heat recovery heat exchanger 2 and the cooler in sequence, and the temperature is reduced. In the three-phase separator 4, hydrogen (H) is separated 2 ) Water (H) 2 O) and solids, the hydrogen produced being used as fuel gas, the solids having a major component of CaCO 3 Ash and unconverted char, this portion of solid product being fed to the regeneration reactor 9, limestone, air and the three phasesThe solids leaving the vessel 4, in a regeneration reactor 9, form CO 2 And CaO, the solid waste which is not fully utilized is discharged, and the generated CaO is sent into the main reactor 1 again to complete the whole coal-to-hydrogen zero emission system.
As an alternative, the outlet product of the regeneration reactor 9 is sent to a solid separation device 8 for removing solid waste, and the product of the solid separation device 8 is sent to the main reactor 1. The liquid phase outlet is connected with a pulping device 6 through a liquid separation device 7.
A first preheating unit 12 and a second preheating unit 11 are respectively arranged in front of a feeding port and an air inlet of the regeneration reactor 9. A third preheating unit 10 is arranged between a liquid outlet of the heat recovery heat exchanger 2 and a liquid inlet of the main reactor 1, and the first preheating unit 12 and the third preheating unit 10 and the second preheating unit 11 feed materials reversely to form a heat exchange device.
And a heat exchange unit 3 is also arranged between the heat recovery heat exchanger 2 and the three-phase separator 4. For reusing the heat exchanged by the heat energy.
The outlet of the pulping device 6 is connected with the liquid inlet of the heat recovery heat exchanger 2 through the delivery pump 5 because the coal slurry has high viscosity and is difficult to deliver.
As an alternative embodiment, the regeneration reactor 9 is provided with a gas line on which a gas line for discharging CO is arranged 2 The gas pipeline of the exhaust port 13 is also connected with a gas inlet at the bottom of the regeneration reactor 9 to form a circulating gas circuit.
The invention also provides a working method of the coal-to-hydrogen zero emission system, which comprises the following steps:
the CaO in the main reactor 1 reacts with the coal slurry to generate a product, and the product enters a three-phase separator 4 to obtain hydrogen, water and solid;
coal and water form coal slurry in the slurry preparation device 6, and the coal slurry enters the heat recovery heat exchanger 2 and exchanges heat with a product of the main reactor 1; then enters a main reactor 1;
the hydrogen separated by the three-phase separator 4 is used as fuel gas, and the main component of the solid is CaCO 3 Ash and unconverted char, the solid product is fed into a regeneration reactor 9, limestone, air andthe solids of the three-phase separator 4 are passed to a regeneration reactor 9 for CO formation 2 And CaO, the solid waste which is not fully utilized is discharged, and the generated CaO is sent into the main reactor 1 again to complete the whole coal-to-hydrogen zero emission system.
Referring to fig. 2, a hydrogen production process according to an embodiment of the present invention is shown. The system is roughly divided into two cycles, the first cycle is a gasification reaction in the main reactor 1, in which coal and H are reacted 2 Reaction of O to CO 2 And H 2 ，H 2 At with O 2 Combined to form H 2 O enters a turbine to generate electricity; the second cycle is an adsorption reaction in the regeneration reactor 9, CaO reacts with CO produced in the first cycle 2 Combined formation of CaCO 3 The heat generated by the process is used for the gasification of coal in the first cycle, followed by CaCO 3 To regenerate CaO and CO 2 。
Wherein the water gas reaction is carried out in a main reactor 1, and the main reactor 1 is an adiabatic reactor. The reaction formula is as follows:
C+H 2 O＝CO+H 2
and (3) shift reaction:
CO+H 2 O＝CO 2 +H 2
CO 2 absorption reaction:
CO 2 +CaO＝CaCO 3
the overall reaction is as follows:
C+2H 2 O+CaO＝2H 2 +CaCO 3
in the regeneration reactor 9, taking into account the preheating of the material, and CaCO is carried out in the regeneration reactor 9 3 The regeneration reaction of (2):
CaCO 3 ＝CO 2 +CaO
in the system analysis, the thermodynamic property of the material flow is forecasted by adopting a PR (process recipe) equation, the equilibrium components of reaction products in each reactor are forecasted by minimizing Gibbs free energy, and the heat is transferred and exchanged by adopting a heat recovery heat exchanger 2 network in the system, so that the feasibility of heat transfer is ensured by the minimum node temperature difference. The optimized system is determined through synchronous optimization of the system structure and parameters, so that a foundation is provided for specific process research.
The product produced in the main reactor 1 is fed to a three-phase separator 4 to obtain hydrogen, water and solids, respectively. Separated hydrogen (H) 2 ) Water (H) 2 O) and solids, the hydrogen produced being used as fuel gas, the solids having a major component of CaCO 3 Ash and unconverted char, this part of the solid product being fed to the regeneration reactor 9, limestone, air and solids of the three-phase separator 4 being formed into CO in the regeneration reactor 9 2 And CaO, the solid waste which is not fully utilized is discharged, and the generated CaO is sent into the main reactor 1 again to complete the whole coal-to-hydrogen zero emission system.
The coal hydrogen production technology can convert the chemical energy contained in coal into the internal energy of a gas product through gasification reaction, and compared with the prior art, the invention has the following beneficial effects:
(1) supercritical water is used as a hydrogen production medium, so that the drying process of pulverized coal can be omitted, the energy consumption in the hydrogen production process is reduced, and the system efficiency is improved;
(2) because the supercritical water has high solubility to organic matters, a homogeneous or quasi-homogeneous hydrogen production reaction environment can be formed, pyrolysis and extraction are integrated, the hydrogen production reaction is convenient to carry out, and the conversion rate is improved to a certain extent;
(3) the water is used as a reaction medium, so that the hydrogen production reaction is favorably carried out in the direction of generating hydrogen, and the water is low in cost, easy to obtain and free from environmental pollution;
(4) the gas, liquid and solid phases in the product are easy to separate, and the process flow is simple. Therefore, the supercritical water coal gasification hydrogen production technology can be matched with the chemical industry, so that the flow of related processes is simplified, pollutants generated by the traditional coal-fired power generation technology can be eliminated from the source, the energy conversion efficiency is further improved, the method can be combined with organic waste treatment, the operation cost is low, the investment return rate is high, and the method is a revolutionary technology.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents may be made to the embodiments of the invention without departing from the spirit and scope of the invention, which is to be covered by the claims.
Claims (10)
1. A coal-to-hydrogen zero emission system is characterized by comprising a main reactor (1), a heat recovery heat exchanger (2), a three-phase separator (4), a regeneration reactor (9) and a pulping device (6);
the outlet of the main reactor (1) is sequentially connected with a heat recovery heat exchanger (2), a cooler and a three-phase separator (4); a gas phase outlet of the three-phase separator (4) discharges fuel gas, a liquid phase outlet is connected with the pulping device (6), and a product at a solid outlet is sent to a feeding hole of the regeneration reactor (9); the regeneration reactor (9) is provided with an air inlet for accessing air and a charging port for adding limestone, and the outlet product of the regeneration reactor (9) is sent to the main reactor (1); the pulping device (6) is provided with a raw material inlet for adding coal and a liquid inlet for connecting make-up water, an outlet of the pulping device (6) is connected with a liquid inlet of the heat recovery heat exchanger (2), and a liquid outlet of the heat recovery heat exchanger (2) is connected with a liquid inlet of the main reactor (1).
2. The coal-to-hydrogen zero emission system according to claim 1, wherein the outlet product of the regeneration reactor (9) is sent to a solid separation device (8) for removing solid waste, and the product of the solid separation device (8) is sent to the main reactor (1).
3. The coal-to-hydrogen zero emission system according to claim 1, wherein the liquid phase outlet is connected with the pulping device (6) through a liquid separation device (7).
4. The coal-to-hydrogen zero emission system according to claim 1, wherein the main reactor (1) is an adiabatic reactor.
5. The coal-to-hydrogen zero emission system according to claim 1, wherein a first preheating unit (12) and a second preheating unit (11) are respectively arranged in front of a feed port and an air inlet of the regeneration reactor (9).
6. The coal-to-hydrogen zero emission system according to claim 5, wherein a third preheating unit (10) is arranged between the liquid outlet of the heat recovery heat exchanger (2) and the liquid inlet of the main reactor (1), and the first preheating unit (12) and the third preheating unit (10) and the second preheating unit (11) are fed reversely to form a heat exchange device.
7. The coal-to-hydrogen zero emission system according to claim 1, wherein a heat exchange unit (3) is further arranged between the heat recovery heat exchanger (2) and the three-phase separator (4).
8. The coal-to-hydrogen zero emission system according to claim 1, wherein the outlet of the pulping device (6) is connected with the liquid inlet of the heat recovery heat exchanger (2) through a delivery pump (5).
9. The system according to claim 1, wherein the regeneration reactor (9) is provided with a gas pipeline for discharging CO 2 The gas pipeline is also connected with a gas inlet at the bottom of the regeneration reactor (9) to form a circulating gas circuit.
10. The working method of the coal-to-hydrogen zero emission system according to any one of claims 1 to 9, comprising:
the CaO of the main reactor (1) reacts with the coal slurry to generate a product, and the product enters a three-phase separator (4) to obtain hydrogen, water and solid;
coal and water form coal slurry in a slurry preparation device (6), and the coal slurry enters a heat recovery heat exchanger (2) and then exchanges heat with a product of a main reactor (1); then enters a main reactor (1);
the hydrogen separated by the three-phase separator (4) is used as fuel gas, and the main component of the solid is CaCO 3 Ash and unconverted char, the solid product being fed to a regeneration reactor (9), limestone, air and solids of the three-phase separator (4) being in the regeneration reactor (9) to form CO 2 And CaO, the solid waste which is not fully utilized is discharged, and the generated CaO is sent into the main reactor (1) again to complete the whole coal-to-hydrogen zero emission system.
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1001002A2 (en) * | 1998-11-11 | 2000-05-17 | Center for Coal Utilization, Japan Tokyo Nissan Building 7F | Method for producing hydrogen by thermochemical decomposition |
| US20040237404A1 (en) * | 2003-05-29 | 2004-12-02 | Alstom (Switzerland) Ltd | Hot solids gasifier with CO2 removal and hydrogen production |
| CN1654313A (en) * | 2005-01-17 | 2005-08-17 | 西安交通大学 | Coal-biomass co-overcritical water catalysis-gasification hydrogen production plant and method |
| CN111205894A (en) * | 2020-03-11 | 2020-05-29 | 西安交通大学 | Carbon-based energy supercritical water gasification hydrogen production and CO2Energy utilization system and method |
| CN111217332A (en) * | 2020-03-11 | 2020-06-02 | 西安交通大学 | Pressure swing absorption separation system and method for supercritical water gasification hydrogen production gas phase product |
-
2022
- 2022-05-31 CN CN202210611898.0A patent/CN114988358A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1001002A2 (en) * | 1998-11-11 | 2000-05-17 | Center for Coal Utilization, Japan Tokyo Nissan Building 7F | Method for producing hydrogen by thermochemical decomposition |
| US20040237404A1 (en) * | 2003-05-29 | 2004-12-02 | Alstom (Switzerland) Ltd | Hot solids gasifier with CO2 removal and hydrogen production |
| CN1654313A (en) * | 2005-01-17 | 2005-08-17 | 西安交通大学 | Coal-biomass co-overcritical water catalysis-gasification hydrogen production plant and method |
| CN111205894A (en) * | 2020-03-11 | 2020-05-29 | 西安交通大学 | Carbon-based energy supercritical water gasification hydrogen production and CO2Energy utilization system and method |
| CN111217332A (en) * | 2020-03-11 | 2020-06-02 | 西安交通大学 | Pressure swing absorption separation system and method for supercritical water gasification hydrogen production gas phase product |
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