CN216473092U - Hydrogen-rich reaction system for coupling coal gasification - Google Patents
Hydrogen-rich reaction system for coupling coal gasification Download PDFInfo
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- CN216473092U CN216473092U CN202123337812.XU CN202123337812U CN216473092U CN 216473092 U CN216473092 U CN 216473092U CN 202123337812 U CN202123337812 U CN 202123337812U CN 216473092 U CN216473092 U CN 216473092U
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Abstract
The utility model relates to a coal gasification technical field, concretely relates to hydrogen-rich reaction system of coupling coal gasification. The hydrogen-rich reaction system for coupling coal gasification comprises a coal gasification device, wherein the bottom of the coal gasification device is provided with a steam inlet and a coal inlet, and the top of the coal gasification device is provided with a synthesis gas outlet; the bottom of the hydrogen enrichment reactor is provided with a synthetic gas inlet and a first solid phase discharge hole, the synthetic gas inlet is communicated with the synthetic gas outlet, and the hydrogen enrichment reactor is also provided with a first gas phase discharge hole and a first solid phase feed hole; the bottom of the thermal decomposition reactor is provided with a second solid-phase discharge hole which is communicated with the first solid-phase feed hole, the thermal decomposition reactor is also provided with a second solid-phase feed hole and a second gas-phase discharge hole, the second solid-phase feed hole is communicated with the first solid-phase discharge hole, and the solar heat source is suitable for providing heat for the thermal decomposition reactor. The utility model provides a rich hydrogen reaction system of coupling coal gasification, the decarbonization effect is better, and rich hydrogen productivity is high to the energy consumption of decarbonization has been reduced by a wide margin.
Description
Technical Field
The utility model relates to a coal gasification technical field, concretely relates to hydrogen-rich reaction system of coupling coal gasification.
Background
The installed capacity of Chinese thermal power reaches 11.4 hundred million kilowatts, and the current energy structure of China still takes coal as a main part and accounts for 58 percent of energy consumption. Compared with the traditional coal-fired power generation technology, the integrated coal gasification technology has higher performance and is beneficial to further reducing carbon emission.
Coal gasification refers to the process of converting solid fuels such as coal, coke, semi-coke, etc. into gas products and a small amount of residues by reacting with a gasification agent under the conditions of high temperature, normal pressure or pressurization. The gasifying agent is mainly water vapor, air or their mixture, and the gas product has different composition depending on the kind of coal material, gasifying agent and gasifying process and may be air gas, semi-water gas, etc.
In the coal gasification with steam as gasifying agent, the obtained gas is water gas which mainly comprises CO and H2CO is converted into CO through a water gas shift reaction2. At this time, CO2For increasing H2Has synergistic effect. Purification of H by PSA2The decarburization effect is poor, the high hydrogen-rich effect is difficult to realize, and the adsorbent is mostly regenerated by the traditional fossil energy, so that high energy consumption is caused.
SUMMERY OF THE UTILITY MODEL
Therefore, the to-be-solved technical problem of the utility model lies in overcoming the defect that the coal gasification decarbonization effect is poor and the energy consumption is big among the prior art to a hydrogen-rich reaction system of coupling coal gasification is provided.
In order to solve the technical problem, the utility model provides a hydrogen-rich reaction system of coupling coal gasification, include:
the bottom of the coal gasification device is provided with a steam inlet and a coal inlet, and the top of the coal gasification device is provided with a synthesis gas outlet;
the bottom of the hydrogen enrichment reactor is provided with a synthetic gas inlet and a first solid phase discharge hole, the synthetic gas inlet is communicated with the synthetic gas outlet, and the hydrogen enrichment reactor is also provided with a first gas phase discharge hole and a first solid phase feed hole;
the bottom of the thermal decomposition reactor is provided with a second solid-phase discharge hole which is communicated with the first solid-phase feed inlet, the thermal decomposition reactor is also provided with a second solid-phase feed inlet and a second gas-phase discharge hole, and the second solid-phase feed inlet is communicated with the first solid-phase discharge hole;
a solar heat source adapted to provide heat to the thermal decomposition reactor.
Optionally, the method further includes:
and the material regeneration storage tank is provided with a third solid phase feeding hole and a third solid phase discharging hole, the third solid phase feeding hole is communicated with the first solid phase discharging hole, and the third solid phase discharging hole is communicated with the second solid phase feeding hole.
Optionally, the solar heat source is disposed on the material regeneration storage tank and adapted to absorb and store solar energy and supply heat to the thermal decomposition reactor.
Optionally, the first gas phase discharge port is suitable for being connected with a gas turbine combined waste heat boiler to generate power, and the second gas phase discharge port is suitable for being connected with CO2And the steam turbine is combined with the waste heat boiler to generate power.
Optionally, the method further includes:
a water storage tank with an inlet to the gas turbine and/or CO2The steam turbine is connected and is suitable for receiving the waste heat, the export of water storage tank with steam inlet intercommunication.
Optionally, the method further includes:
and the oxide storage tank is communicated with the second solid-phase discharge hole, a material outlet is formed in the bottom of the oxide storage tank, and the material outlet is communicated with the first solid-phase feed hole.
Optionally, the method further includes:
the gas storage tank, its with oxide storage tank and second gaseous phase discharge gate all communicate through the on-off valve, the oxide storage tank is equipped with the third gaseous phase discharge gate.
Optionally, the method further includes:
and the input port of the coal purification device is suitable for being connected with a coal source, and the output port of the coal purification device is communicated with the coal inlet.
The utility model discloses technical scheme has following advantage:
1. the utility model provides a rich hydrogen reaction system of coupling coal gasification is equipped with coal gasification equipment, rich hydrogen reactor and thermal decomposition reactor, places the oxide in rich hydrogen reactor during the use, and coal gasification equipment exhaust water coal gas and vapor get into rich hydrogen reactor, take place following reaction (use the oxide as CaO for the example):
CO+H2O→H2+CO2，CO2+CaO→CaCO3
in a first aspect, CO2Reaction with oxides to enable CO2And CO, and2the consumption of the catalyst can promote the water gas shift reaction, further eliminate CO, has good carbon removal effect and can generate rich H2Phase (1); in a second aspect, the oxide is decarbonized to generate carbonate, the carbonate is decomposed in the thermal decomposition reactor to form oxide, so that the carbon capture material can be recycled, and the heat is depended on from solar energy, thereby greatly reducing the energy consumption of decarburization.
2. The utility model provides a rich hydrogen reaction system of coupling coal gasification is equipped with material regeneration storage tank, can store the carbonate that generates in the rich hydrogen reaction ware, and rich hydrogen reaction passes through with the thermal decomposition reaction like this material regeneration storage tank is separated by, even two reactions are asynchronous, also can guarantee that both independent go on in succession to production efficiency has been improved.
3. The utility model provides a rich hydrogen reaction system of coupling coal gasification sets up the solar thermal energy source on the material regeneration jar for the solar thermal energy source need not occupy independent space, and the space occupies littleer.
4. The utility model provides a rich hydrogen reaction system of coupling coal gasification, with gaseous phase discharge gate and steam turbine or gas turbine linkage, can realize the H that generates2Or CO2Centralized processing.
5. The utility model provides a rich hydrogen reaction system of coupling coal gasification is equipped with the water storage tank, and the water storage tank is connected with steam turbine or gas turbine, can generate vapor for the water storage tank with steam turbine or gas turbine's waste heat transfer, has further reduced the loss of whole device, saves the environmental protection.
6. The utility model provides a rich hydrogen reaction system of coupling coal gasification is equipped with the oxide storage tank, can store the oxide, even rich hydrogen reaction and thermal decomposition reaction beat mismatch, because the oxide storage tank can be used to store the oxide, so can avoid reducing because of the production efficiency that two reaction beats mismatch lead to.
7. The utility model provides a hydrogen-rich reaction system of coupling coal gasification is equipped with the gas holder, can get into the CO of oxide storage tank through control on the one hand2The amount of the oxide and the carbonate in the oxide tank is controlled, so that the conversion degree of the hydrogen-rich reaction is influenced when the hydrogen-rich reaction enters the hydrogen-rich reactor, and the conversion degree of the hydrogen-rich reaction can be improved through the adjustment of the ratio of the oxide and the carbonate; on the other hand, when CO2When excess CO is introduced, excess CO2The heat released by the reaction of the heat-carrying gas and the oxide is discharged from the third gas-phase discharge hole and is provided for other scenes needing heat, so that the system has the function of energy storage.
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 embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a hydrogen-rich reaction system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a hydrogen enrichment reactor in an embodiment of the present invention.
Description of reference numerals:
1. a coal gasification unit; 11. a steam inlet; 12. a coal inlet; 13. a syngas outlet; 2. a hydrogen enrichment reactor; 21. a syngas inlet; 22. a first gas phase discharge port; 23. a first solid phase feed inlet; 24. a first solid phase discharge port; 3. a thermal decomposition reactor; 31. a second solid phase discharge port; 32. a second solid phase feed inlet; 33. a second gas phase discharge port; 4. a material regeneration storage tank; 41. a third solid phase feed inlet; 42. a third solid phase discharge port; 5. a water storage tank; 6. an oxide storage tank; 61. a third gas phase discharge port; 7. a gas storage tank; 8. a coal purification device.
Detailed Description
With reference to fig. 1-2, an embodiment of the present invention provides a hydrogen-rich reaction system for coupled coal gasification, including:
the bottom of the coal gasification device 1 is provided with a steam inlet 11 and a coal inlet 12, and the top of the coal gasification device is provided with a synthetic gas outlet 13; the synthesis gas comprises water, coal gas and water vapor; the coal gasification device 1 is suitable for generating coal gasification reaction by taking steam as a gasification agent;
the bottom of the hydrogen enrichment reactor 2 is provided with a synthetic gas inlet 21 and a first solid phase discharge hole 24, the synthetic gas inlet 21 is communicated with the synthetic gas outlet 13, and the hydrogen enrichment reactor 2 is also provided with a first gas phase discharge hole 22 and a first solid phase feed hole 23; the hydrogen enrichment reactor 2 is suitable for hydrogen enrichment reaction; the first gas phase outlet 22 is adapted to discharge the generated H2(ii) a The first solid phase feed inlet 23 is adapted for the input of oxides; the positions of the first solid phase feed inlet 23 and the first gas phase discharge outlet 22 are not limited, and preferably, the first solid phase feed inlet 23 is arranged at the side part of the hydrogen enrichment reactor 2, and the first gas phase discharge outlet 22 is arranged at the top part of the hydrogen enrichment reactor 2; the hydrogen-enriching reactor 2 preferably adopts a fluidized bed reaction structure, as shown in fig. 2, and carbonate generated after reaction is discharged from the bottom of the cyclone;
the bottom of the thermal decomposition reactor 3 is provided with a second solid phase discharge hole 31, the second solid phase discharge hole 31 is communicated with the first solid phase feed hole 23, the thermal decomposition reactor 3 is also provided with a second solid phase feed hole 32 and a second gas phase discharge hole 33, and the second solid phase feed hole 32 is communicated with the first solid phase discharge hole 24; the thermal decomposition reactor 3 is adapted to perform an exothermic carbonation reaction; the second solid phase discharge port 31 is suitable for discharging oxides, and the second solid phase feed port 32 is suitable for feeding carbonate;
a solar heat source adapted to provide heat to the thermal decomposition reactor; the solar heat source adopts the existing mature device which can absorb solar energy and convert the solar energy into heat energy
When the system of the embodiment is used, the oxide may be one or a combination of more of CaO, SrO, and perovskite.
In the hydrogen-rich reaction system provided in this example, the water gas and steam generated after coal gasification were introduced into the oxidizing agent, and CO in the water gas2Will react with oxides to be eliminated, CO2The elimination of (1) can promote the water gas shift reaction to further eliminate CO, has good carbon removal effect and simultaneously improves H2Yield, producing a hydrogen-rich gas phase; in addition, the desired oxides and CO2The carbonate generated after the reaction is thermally decomposed to reform oxide into the hydrogen-rich reactor 2, so that the carbon capture material can be recycled, and the heat depended on comes from solar energy, thereby reducing the energy consumption.
As an improved scheme: further comprising:
and the material regeneration storage tank 4 is provided with a third solid phase feeding hole 41 and a third solid phase discharging hole 42, the third solid phase feeding hole 41 is communicated with the first solid phase discharging hole 24, and the third solid phase discharging hole 42 is communicated with the second solid phase feeding hole 32. The material regeneration storage tank 4 is mainly used for storing the carbonate generated from the hydrogen enrichment reactor 2 and is in a state to be circulated.
Through the improved scheme, the carbonate generated in the hydrogen enrichment reactor 2 can be conveyed to the material regeneration storage tank 4 for storage, so that the thermal decomposition reaction and the hydrogen enrichment reaction are separated by the material regeneration storage tank 4, and even if the two reactions are asynchronous, the two reactions can be respectively and independently carried out, thereby ensuring the production efficiency.
Preferably, the solar heat source is arranged on the material regeneration storage tank 4 and is suitable for absorbing,Storing solar energy and supplying heat to the thermal decomposition reactor 3. The material regeneration tank absorbs and stores solar energy, and supplies heat to the material regeneration tank when the thermal decomposition reaction is needed. Preferably, the first gas phase discharge port 22 is suitable for being connected with a gas turbine to generate power by combining with a waste heat boiler, and the second gas phase discharge port 33 is suitable for being connected with CO2And the steam turbine is combined with the waste heat boiler to generate power. The preferred embodiment is H generated by hydrogen-rich reaction2And CO formed by thermal decomposition2The utility model provides a concrete processing mode makes the utility model discloses the system links with turbine power generation system, and all gases can both be recycled, environmental protection and energy saving more.
As an improved scheme: the hydrogen-rich reaction system further comprises:
a water storage tank 5, the inlet of which is connected to the gas turbine and/or CO2The steam turbine is connected and is suitable for receiving the waste heat, the export of water storage tank 5 with steam inlet 11 intercommunication. In particular, the inlet of the water storage tank 5 may be connected to said gas turbine, or to CO2The turbine is connected or both are connected.
Through above-mentioned improvement scheme, supply with water storage tank 5 with the waste heat that the turbine produced, moisture heat absorption forms vapor and carries to coal gasification device 1 in, has further improved the utility model discloses rich hydrogen reaction system and turbine power generation system's linkage, it is energy-concerving and environment-protective more.
As a refinement, the hydrogen-rich reaction system further comprises:
and the oxide storage tank 6 is communicated with the second solid-phase discharge hole 31, a material outlet is formed in the bottom of the oxide storage tank 6, and the material outlet is communicated with the first solid-phase feed hole 23.
Through above-mentioned improvement scheme, can carry the oxide that thermal decomposition reaction produced to oxide storage tank 6 and store for thermal decomposition reaction and hydrogen-rich reaction pass through oxide storage tank 6 are separated by, even thermal decomposition reaction and hydrogen-rich reaction takt do not match, also can compensate through this oxide storage tank 6, thereby guarantee that two reactions all can independently go on in succession, have improved production efficiency.
As an improved scheme: the hydrogen-rich reaction system further comprises:
and the gas storage tank 7 is communicated with the oxide storage tank 6 and the second gas-phase discharge hole 33 through on-off valves, and the oxide storage tank 6 is provided with a third gas-phase discharge hole 61. In use, CO generated in the reactor 3 is thermally decomposed2Enter the gas holder 7 to store, and have two functions: first, CO can be controlled into the oxygenate storage tank 62The content is used for controlling the proportion of the oxide and the carbonate in the oxide storage tank 6, so that the hydrogen-rich reaction is adjusted according to the proportion, and the conversion degree of the hydrogen-rich reaction is improved; secondly, when heat is needed, excessive CO can be introduced into the oxide storage tank 62，CO2Reaction with the oxide exothermic, excess CO2The heat can be discharged from the third gas phase discharge port 61 and supplied to the scene needing heat supply, so that the energy consumption is saved, for example, in FIG. 1, surplus CO2Carry heat into CO2And generating power by combining a waste heat boiler in the steam turbine.
As an improved scheme: the hydrogen-rich reaction system further comprises:
and the input port of the coal purification device 8 is suitable for being connected with a coal source, and the output port of the coal purification device is communicated with the coal inlet 12.
Through the improved scheme, the coal entering the coal gasification device 1 is cleaner, so that the impurity gas in the water gas generated by coal gasification is less, and the H generated in the hydrogen enrichment reactor 2 is ensured2The purity is higher.
A method for removing carbon by coal gasification in a hydrogen-rich reaction system, which is dependent on the utility model: introducing the water gas and the steam after the coal gasification into a hydrogen-rich reactor 2 containing oxides to generate carbonate and H2(ii) a The produced carbonate is transferred to a thermal decomposition reactor 3 and thermally decomposed to produce an oxide and CO2(ii) a Transferring the generated oxide to the hydrogen enrichment reactor 2 for reaction; and the process is circulated.
Specifically, the oxide is preferably CaO, SrO, or Fe3O4、Co3O4、CuO、NiO、Mn2O3、Al2O3Or perovskite type complex oxide, or use thereofOxides as a base material. For example, adding Co to CaO as a base3O4Formation of CaCO in composite materials3And CoO; adding Mn by taking CaO as a base material2O3Formation of CaCO in composite materials3And Mn3O4(ii) a CaCO is generated by adding CuO composite material with CaO as base material3And Cu2O。
Preferably, H is to be generated2Introducing the gas turbine and the waste heat boiler to generate power, and generating CO2Introducing CO2Steam turbine combined with waste heat boiler to generate electricity so as to generate H2And CO2Can be used, and simultaneously, the power generation energy consumption is reduced, and the device is environment-friendly and energy-saving.
It should be noted that the solid phase material can be transported between different devices by means of screw feeding or slope feeding.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications therefrom are within the scope of the invention.
Claims (8)
1. A hydrogen-rich reaction system coupled with coal gasification, comprising:
the bottom of the coal gasification device (1) is provided with a steam inlet (11) and a coal inlet (12), and the top of the coal gasification device is provided with a synthesis gas outlet (13);
the bottom of the hydrogen enrichment reactor (2) is provided with a synthetic gas inlet (21) and a first solid phase discharge hole (24), the synthetic gas inlet (21) is communicated with the synthetic gas outlet (13), and the hydrogen enrichment reactor (2) is also provided with a first gas phase discharge hole (22) and a first solid phase feed hole (23);
the bottom of the thermal decomposition reactor (3) is provided with a second solid phase discharge hole (31), the second solid phase discharge hole (31) is communicated with the first solid phase feed hole (23), the thermal decomposition reactor (3) is also provided with a second solid phase feed hole (32) and a second gas phase discharge hole (33), and the second solid phase feed hole (32) is communicated with the first solid phase discharge hole (24);
a solar heat source adapted to provide heat to the thermal decomposition reactor.
2. The coupled coal gasification hydrogen-rich reaction system of claim 1, further comprising:
the material regeneration storage tank (4) is provided with a third solid phase feeding hole (41) and a third solid phase discharging hole (42), the third solid phase feeding hole (41) is communicated with the first solid phase discharging hole (24), and the third solid phase discharging hole (42) is communicated with the second solid phase feeding hole (32).
3. The system for coupling coal gasification hydrogen-rich reaction according to claim 2, wherein the solar heat source is disposed on the material regeneration storage tank (4) and is adapted to absorb, store solar energy and supply heat to the thermal decomposition reactor (3).
4. The coupled coal gasification hydrogen-rich reaction system according to any one of claims 1 to 3, wherein the first gas phase outlet (22) is adapted to be connected with a gas turbine combined waste heat boiler to generate power, and the second gas phase outlet (33) is adapted to be connected with CO2And the steam turbine is combined with the waste heat boiler to generate power.
5. The coupled coal gasification hydrogen-rich reaction system of claim 4, further comprising:
a water storage tank (5) with an inlet to the gas turbine and/or CO2The steam turbine is connected and is suitable for receiving the waste heat, the export of water storage tank (5) with steam inlet (11) intercommunication.
6. The hydrogen-rich reaction system for coupled coal gasification according to any one of claims 1 to 3, further comprising:
the oxide storage tank (6) is communicated with the second solid phase discharge hole (31), a material outlet is formed in the bottom of the oxide storage tank (6), and the material outlet is communicated with the first solid phase feed hole (23).
7. The coupled coal gasification hydrogen-rich reaction system of claim 6, further comprising:
the gas storage tank (7) is communicated with the oxide storage tank (6) and the second gas-phase discharge hole (33) through on-off valves, and the oxide storage tank (6) is provided with a third gas-phase discharge hole (61).
8. The hydrogen-rich reaction system for coupled coal gasification according to any one of claims 1 to 3, further comprising:
and the input port of the coal purification device (8) is suitable for being connected with a coal source, and the output port of the coal purification device is communicated with the coal inlet (12).
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| CN202123337812.XU CN216473092U (en) | 2021-12-27 | 2021-12-27 | Hydrogen-rich reaction system for coupling coal gasification |
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| CN202123337812.XU CN216473092U (en) | 2021-12-27 | 2021-12-27 | Hydrogen-rich reaction system for coupling coal gasification |
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