Chemical looping combustion coupling coal-fired unit semi-coke sludge blending combustion system and method
By coupling chemical looping combustion technology with coal-fired power generation units and introducing the co-treatment of semi-coke and sludge, the problems of carbon emission reduction and sludge treatment of coal-fired power generation units have been solved, achieving efficient carbon capture and sludge resource utilization, and improving the flexibility and combustion efficiency of the units.
Patent Information
- Application Number
- CN202510919402.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-04
- Publication Date
- 2025-11-25
AI Technical Summary
Traditional coal-fired power generating units face pressure to reduce carbon emissions, difficulties in utilizing complex solid fuel semi-coke, and challenges in urban sludge treatment. Existing technologies are insufficient to achieve efficient, stable, and economical carbon capture and sludge resource utilization.
By coupling chemical looping combustion technology with existing coal-fired power generation units, introducing the co-treatment of semi-coke and sludge, generating oxygen and hydrogen through an electrolysis water device, using renewable energy to generate electricity and reduce system power consumption, and feeding semi-coke and sludge powder into the boiler for combustion through a semi-coke pulverizing system and a sludge pulverizing system, multiple objectives are synergistically addressed.
It has achieved improvements in carbon emission reduction, solid waste resource utilization, and unit flexibility peak-shaving capabilities, promoted the cascade utilization of coal and unit flexibility peak-shaving, and reduced system carbon emissions and energy consumption.
Smart Images
Figure CN121007315A_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of boiler power generation technology, and more specifically, to a system and method for co-firing semi-coke sludge in a chemical looping combustion coupled coal-fired power unit. Background Technology
[0002] Currently, traditional coal-fired power generating units face severe pressure to reduce carbon emissions and transition to green and low-carbon practices. Chemical Looping Combustion (CLC) technology, as a promising carbon capture method, achieves the stepwise release of fuel chemical energy through the circulation of metal oxide oxygen carriers between the fuel reactor and the air reactor. Its core advantage lies in the inherent separation and high-concentration enrichment of CO2 and water vapor during the reaction process, significantly reducing the energy consumption and cost of subsequent carbon capture. However, the large-scale application of CLC technology is still limited by the development of efficient, stable, and inexpensive oxygen carrier materials, as well as the adaptability challenges of complex solid fuels (such as coal and its derivative fuels) in this system. Meanwhile, the large amount of semi-coke generated from coal staged utilization (such as pyrolysis) faces bottlenecks in efficient and clean utilization due to its low combustion activity and difficulty in ignition. On the other hand, the amount of sludge generated from urban sewage treatment is enormous and continuously increasing, creating an urgent need for its harmless and resource-based disposal. However, the separate incineration of sludge suffers from problems such as low calorific value, high moisture content, difficulty in controlling pollutants (heavy metals, dioxins, etc.), and poor economic efficiency. Therefore, innovative system integration solutions are urgently needed to collaboratively address the aforementioned challenges. Coupled with chemical looping combustion technology and existing coal-fired power generating units, and innovatively introducing the co-treatment of semi-coke and sludge, a "chemical looping combustion coupled coal-fired unit semi-coke and sludge co-firing" system is expected to achieve multiple objectives, including carbon emission reduction, solid waste resource utilization, and improved unit flexibility and peak-shaving capabilities. Summary of the Invention
[0003] This application provides at least one system and method for chemical looping combustion coupled with co-firing of semi-coke and sludge in coal-fired power units. This system couples chemical looping combustion technology with existing coal-fired power generating units and innovatively introduces the co-treatment of semi-coke and sludge, which is expected to achieve multiple objectives.
[0004] In a first aspect, embodiments of this application provide a system for co-firing semi-coke sludge in a chemical looping combustion coupled coal-fired power unit, including a boiler, an electrolysis water device, a fuel reactor, an air reactor, a first blower, a second blower, a semi-coke pulverizing system, a semi-gasification stable combustion burner, and a sludge pulverizing system; redundant power generated by renewable energy power generation supplies power to the electrolysis water device, which is used to generate oxygen and hydrogen;
[0005] The first inlet of the fuel reactor is connected to the hydrogen outlet of the water electrolysis device, so that the hydrogen reduces the metal oxides in the fuel reactor to a metal carrier and generates steam.
[0006] The first inlet of the air reactor is connected to the first outlet of the fuel reactor, so that the metal carrier undergoes an oxidation reaction in the air reactor to generate metal oxides and release heat.
[0007] The first outlet of the air reactor is connected to the second inlet of the fuel reactor to deliver the metal oxide to the fuel reactor;
[0008] The inlet and outlet of the semi-coke pulverizing system are connected to the air outlet of the first blower and the inlet of the semi-gasification stable combustion burner, respectively, so as to send the gasification background gas into the semi-coke pulverizing system and transport the semi-coke powder in the semi-coke pulverizing system to the semi-gasification stable combustion burner.
[0009] The outlet of the semi-gasification stable combustion burner is connected to the nozzle of the stable combustion burner of the boiler, so as to mix the semi-coke powder and the gasification background gas and carry out a partial oxidation reaction before transporting them into the boiler for combustion.
[0010] The inlet and outlet of the sludge pulverizing system are respectively connected to the air outlet of the second blower and the sludge burner nozzle of the boiler, so as to use primary air to dry the sludge powder in the sludge pulverizing system and transport the sludge powder to the boiler for combustion.
[0011] In one optional embodiment, the second inlet and the second outlet of the air reactor are respectively connected to the air outlet of the first blower and the inlet of the semi-coke pulverizing system, so as to preheat the gasification background gas using the air reactor and then deliver it to the semi-coke pulverizing system.
[0012] In one optional embodiment, the third inlet and the third outlet of the air reactor are respectively connected to the air outlet of the second blower and the inlet of the sludge pulverizing system, so that the primary air is preheated by the air reactor and then sent into the sludge pulverizing system.
[0013] In one optional embodiment, the system further includes an air preheater, the inlet and outlet of which are connected to the air outlet of the second fan and the third inlet of the air reactor, respectively, so as to preheat the primary air in the air preheater and then send it into the air reactor for secondary preheating.
[0014] In one optional embodiment, the system further includes a first gas mixer, the first inlet, the second inlet, and the outlet of the first gas mixer being connected to the air outlet of the first blower, the second outlet of the fuel reactor, and the inlet of the semi-coke pulverizing system, respectively, so as to mix the gasification background gas and the steam in the first gas mixer and then send them into the semi-coke pulverizing system.
[0015] In one alternative embodiment, the system further includes a condenser and a water storage tank; the inlet and outlet of the condenser are respectively connected to the third outlet of the fuel reactor and the inlet of the water storage tank, so as to cool the steam into water and store it in the water storage tank.
[0016] Secondly, embodiments of this application also provide a method for co-firing semi-coke sludge in a chemical looping combustion coupled coal-fired power unit, applicable to the aforementioned system for co-firing semi-coke sludge in a chemical looping combustion coupled coal-fired power unit, comprising:
[0017] The redundant power generated by renewable energy generation is used to power the water electrolysis device, enabling the device to generate oxygen and hydrogen.
[0018] The water electrolysis device introduces hydrogen gas into the fuel reactor, whereby the hydrogen gas reduces the metal oxides in the fuel reactor to a metal carrier and generates steam.
[0019] The first blower sends the gasification background gas into the semi-coke pulverizing system and uses the gasification background gas to send the semi-coke powder in the semi-coke pulverizing system into the semi-gasification stable combustion burner.
[0020] The semi-gasification stable combustion burner mixes the semi-coke powder and the gasification background gas and performs a partial oxidation reaction before delivering it to the boiler for combustion.
[0021] The second blower sends primary air into the sludge pulverizing system and uses the primary air to send the sludge powder in the sludge pulverizing system into the boiler as fuel.
[0022] In one alternative embodiment, the gasification background gas is preheated by the air reactor before being fed into the semi-coke pulverizing system.
[0023] In one alternative embodiment, the gasification background gas is mixed with steam generated by the fuel reactor before being fed into the semi-coke pulverizing system.
[0024] In one alternative implementation, the primary air is preheated sequentially by an air preheater and the air reactor before being fed into the sludge pulverizing system.
[0025] The above-mentioned technical solution of this application has the following beneficial technical effects:
[0026] The system of chemical looping combustion coupled with the co-firing of semi-coke and sludge in coal-fired power units in this application embodiment couples chemical looping combustion technology with existing coal-fired power generating units and innovatively introduces the co-treatment of semi-coke and sludge, which is expected to achieve multiple objectives, including carbon emission reduction, solid waste resource utilization, and improvement of unit flexibility and peak-shaving capabilities.
[0027] To make the above-mentioned objectives, features and advantages of this application more apparent and understandable, preferred embodiments are described below in detail with reference to the accompanying drawings. Attached Figure Description
[0028] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly described below. These drawings are incorporated in and constitute a part of this specification. They illustrate embodiments conforming to this application and, together with the specification, serve to explain the technical solutions of this application. It should be understood that the following drawings only show some embodiments of this application and should not be considered as limiting the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.
[0029] Figure 1 This illustration shows a schematic diagram of a system for co-firing semi-coke sludge in a coal-fired power unit using chemical looping combustion coupled with an embodiment of this application.
[0030] In the picture:
[0031] 1. Water electrolysis unit; 2. Oxygen storage tank; 3. Hydrogen storage tank; 4. Air reactor; 5. Fuel reactor; 6. First blower; 7. First gas mixer; 8. Semi-coke pulverizing system; 9. Condenser; 10. Water storage tank; 11. Second gas mixer; 12. Semi-gasification stable combustion burner; 13. Stable combustion burner nozzle; 14. Sludge burner nozzle; 15. Combustion air nozzle; 16. Second blower; 17. Air preheater; 18. Dust collector; 19. Exhaust fan; 20. Chimney; 21. Boiler. Detailed Implementation
[0032] Various exemplary embodiments of the present application will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values of the components and steps set forth in these embodiments do not limit the scope of the present application.
[0033] The embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.
[0034] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.
[0035] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.
[0036] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0037] refer to Figure 1 This application provides a system for co-firing semi-coke sludge in a chemical looping combustion coupled coal-fired unit, including a boiler 21, an electrolysis water device 1, a fuel reactor 5, an air reactor 4, a first blower 6, a second blower 16, a semi-coke pulverizing system 8, a semi-gasification stable combustion burner 12, and a sludge pulverizing system.
[0038] The redundant power generated by renewable energy sources powers the water electrolysis unit 1, which produces oxygen and hydrogen. Using redundant renewable energy to power the water electrolysis unit 1 reduces system power consumption and carbon emissions. The renewable resources can be wind power or photovoltaic power.
[0039] The first inlet of the fuel reactor 5 is connected to the hydrogen outlet of the water electrolysis unit 1, so that the hydrogen reduces the metal oxides in the fuel reactor 5 to a metal carrier and generates steam. That is, the water electrolysis unit 1 delivers hydrogen to the fuel reactor 5, where it undergoes flameless combustion, reducing the metal oxides to a metal carrier and generating steam. This not only provides high safety but also achieves clean and zero-carbon combustion.
[0040] The first inlet of the air reactor 4 is connected to the first outlet of the fuel reactor 5, so that the metal carrier undergoes an oxidation reaction in the air reactor 4 to generate metal oxides and release heat. That is, the fuel reactor 5 transports the metal carrier to the air reactor 4, where the metal carrier reacts with air in the air oxygenator to generate metal oxides and release heat.
[0041] The first outlet of the air reactor 4 is connected to the second inlet of the fuel reactor 5 to transport the metal oxide to the fuel reactor 5. That is, the air reactor 4 returns the metal oxide produced in the reaction to the fuel reactor 5 to continue reacting with hydrogen.
[0042] The inlet and outlet of the semi-coke pulverizing system 8 are connected to the outlet of the first blower 6 and the inlet of the semi-gasification stable combustion burner 12, respectively, so as to send the gasification background gas into the semi-coke pulverizing system 8 and transport the semi-coke powder in the semi-coke pulverizing system 8 to the semi-gasification stable combustion burner 12. That is, the first blower 6 sends the gasification background gas into the semi-coke pulverizing system 8, and the gasification background gas sends the semi-coke powder in the semi-coke pulverizing system 8 to the semi-gasification stable combustion burner 12.
[0043] The outlet of the semi-gasification stable combustion burner 12 is connected to the stable combustion burner nozzle 13 of the boiler 21 to mix the semi-coke powder and the gasification background gas and carry out a partial oxidation reaction before being transported into the boiler 21 for combustion. That is, the gasification background gas and the semi-coke powder are mixed in the semi-gasification stable combustion burner 12 and undergo a partial oxidation reaction (to obtain carbon monoxide).
[0044] The inlet and outlet of the sludge pulverizing system are connected to the air outlet of the second blower 16 and the sludge burner nozzle 14 of the boiler 21, respectively, so as to use primary air to dry the sludge powder in the sludge pulverizing system and transport the sludge powder into the boiler 21 for combustion. That is, the second blower 16 sends primary air into the sludge pulverizing system, and the primary air sends the sludge powder in the sludge pulverizing system into the boiler 21 through the sludge burner nozzle 14.
[0045] For example, the second inlet and the second outlet of the air reactor 4 are connected to the air outlet of the first blower 6 and the inlet of the semi-coke pulverizing system 8, respectively, so as to preheat the gasification background gas using the air reactor 4 before it is delivered to the semi-coke pulverizing system 8. That is to say, in actual use, the heat generated by the oxidation reaction can be used to increase the temperature of the gasification background gas, which can facilitate the improvement of the combustion stability performance of the semi-gasification stable combustion burner 12.
[0046] For example, the third inlet and third outlet of the air reactor 4 are connected to the air outlet of the second blower 16 and the inlet of the sludge pulverizing system, respectively, so that the primary air is preheated by the air reactor 4 and then sent into the sludge pulverizing system. That is to say, in actual use, the heat generated by the oxidation reaction can be used to increase the temperature of the primary air in order to increase the drying output of the sludge pulverizing system.
[0047] For example, the system also includes an air preheater 17, which is installed inside the filtered exhaust gas duct. The inlet and outlet of the air preheater 17 are connected to the outlet of the second fan 16 and the third inlet of the air reactor 4, respectively, so that the primary air is preheated by the air preheater 17 and then sent to the air reactor 4 for secondary preheating. That is to say, in actual use, the air preheater 17 and the air reactor 4 can preheat the primary air twice, which can further improve the drying output of the sludge pulverizing system.
[0048] For example, the system also includes a first gas mixer 7, whose first inlet, second inlet, and outlet are respectively connected to the air outlet of the first blower 6, the second outlet of the fuel reactor 5, and the inlet of the semi-coke pulverizing system 8, so as to mix the gasification background gas with steam in the first gas mixer 7 and then send it into the semi-coke pulverizing system 8. That is, in specific use, some of the steam generated in the fuel reactor 5 can be mixed with the gasification background gas to increase the temperature of the gasification background gas, thereby improving the combustion stability performance of the semi-gasification stable combustion burner 12. In addition, due to the addition of steam, hydrogen can also be generated during the subsequent partial oxidation reaction, which can improve the combustion stability performance of the semi-gasification stable combustion burner 12.
[0049] For example, the system also includes a condenser 9 and a water storage tank 10; the inlet and outlet of the condenser 9 are connected to the third outlet of the fuel reactor 5 and the inlet of the water storage tank 10, respectively, to cool the steam into water and store it in the water storage tank 10. That is, in practical use, except for some steam mixed with the gasification background gas, the remaining steam can be collected by condensation. It should be noted that the steam generated by hydrogen combustion in the fuel reactor 5 has a very high concentration, and the condensate can be used as feedwater for the boiler 21.
[0050] For example, the system also includes a hydrogen storage tank 3, whose hydrogen inlet and outlet are connected to the hydrogen outlet of the water electrolysis device 1 and the first inlet of the fuel reactor 5, respectively. In practical use, the hydrogen generated by the electrolysis of the water electrolysis device 1 can be transported to the hydrogen storage tank 3 for storage. When long-term storage of hydrogen is required, the hydrogen in the hydrogen storage tank 3 is transported to the fuel reactor 5, where it reacts with metal oxides to form a metal carrier and vapor.
[0051] For example, the system also includes a second gas mixer 11, whose inlet and outlet are connected to the oxygen outlet of the water electrolysis device 1 and the burnout air nozzle 15 of the boiler 21, respectively. In practical use, the second gas mixer 11 can mix the oxygen generated by the electrolysis of the water electrolysis device 1 with air to form oxygen-enriched burnout air. The oxygen-enriched burnout air is sent into the boiler 21 to increase the oxygen content in the furnace, thereby improving the combustion efficiency of the mixed fuel in the furnace.
[0052] The system also includes an oxygen storage tank 2. The oxygen inlet and outlet of the oxygen storage tank 2 are connected to the oxygen outlet of the water electrolysis device 1 and the inlet of the second gas mixer 11, respectively. The outlet of the second gas mixer 11 is connected to the burnout air nozzle 15 of the boiler 21. In practical use, the oxygen generated by the electrolysis of the water electrolysis device 1 is transported to the oxygen storage tank 2 for storage. Simultaneously, the oxygen in the oxygen storage tank 2 is mixed with air in the second gas mixer 11 to obtain oxygen-enriched burnout air, which is then sent into the boiler 21 for combustion through the burnout air nozzle 15. It should be noted that when the oxygen production exceeds the consumption, the oxygen stored in the oxygen storage tank 2 can be processed as a chemical product.
[0053] For example, the system also includes a dust collector 18, an induced draft fan 19, and a chimney 20. The inlet and outlet of the dust collector 18 are connected to the tail flue of the boiler 21 and the inlet of the induced draft fan 19, respectively, and the outlet of the induced draft fan 19 is connected to the inlet of the chimney 20. In practical use, the flue gas generated by the combustion of the boiler 21 can be dusted in the dust collector 18 and then discharged through the induced draft fan 19 and the chimney 20.
[0054] The operating direction of the system for co-firing semi-coke sludge in a chemical looping combustion coupled coal-fired power unit according to embodiments of this application includes:
[0055] 1) The redundant power generated by renewable energy generation is used to power the water electrolysis device 1, so that the water electrolysis device 1 can be used to generate oxygen and hydrogen.
[0056] 2) The water electrolysis device 1 introduces hydrogen into the fuel reactor 5, and the hydrogen reduces the metal oxides in the fuel reactor 5 to metal carriers and generates steam.
[0057] 3) The first blower 6 sends the gasification background gas into the semi-coke pulverizing system 8, and uses the gasification background gas to send the semi-coke powder in the semi-coke pulverizing system 8 into the semi-gasification stable combustion burner 12.
[0058] 3) The semi-gasification stable combustion burner 12 mixes the semi-coke powder and the gasification background gas and performs a partial oxidation reaction before delivering it to the boiler 21 for combustion.
[0059] 4) The second blower 16 sends primary air into the sludge pulverizing system and uses the primary air to send the sludge powder in the sludge pulverizing system into the boiler 21 as fuel.
[0060] 5) The flue gas generated by the combustion of boiler 21 is removed from dust in dust collector 18 and then discharged into the air through induced draft fan 19 and chimney 20.
[0061] Furthermore, before the gasified background gas is fed into the semi-coke pulverizing system 8, the gasified background gas is preheated by the air reactor 4. In this way, the heat generated by the oxidation reaction can be used to increase the temperature of the gasified background gas, thereby facilitating the improvement of the combustion stability performance of the semi-gasified stable combustion burner 12.
[0062] Furthermore, before the gasified background gas is fed into the semi-coke pulverizing system 8, the gasified background gas is mixed with the steam generated by the fuel reactor 5. In this way, the temperature of the gasified background gas can be increased by steam, thereby facilitating the improvement of the combustion stability performance of the semi-gasified stable combustion burner 12.
[0063] Furthermore, before the primary air is sent into the sludge pulverizing system, it is preheated sequentially by the air preheater 17 and the air reactor 4. In this way, the primary air can be preheated twice by the air preheater 17 and the air reactor 4, thereby further improving the drying output of the sludge pulverizing system.
[0064] Furthermore, the second gas mixer 11 is used to mix air and oxygen to obtain oxygen-enriched burnout air, which is then delivered to the boiler 21 through the burnout air nozzle 15.
[0065] The system for co-firing semi-coke and sludge in coal-fired power units, as described in this application, couples chemical looping combustion technology with existing coal-fired power generating units and innovatively introduces the co-treatment of semi-coke and sludge. This is expected to achieve multiple objectives, including carbon emission reduction, solid waste resource utilization, and improved unit flexibility and peak-shaving capabilities. Furthermore, this system achieves the organic coupling of sludge combustion and coal chemical processes, promoting the efficient cascade utilization of coal and the flexibility of unit peak-shaving.
[0066] One or more embodiments in this specification are intended to cover all such substitutions, modifications, and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of one or more embodiments in this specification should be included within the protection scope of this application.
[0067] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A system for co-firing semi-coke sludge in a chemical looping combustion coupled coal-fired power unit, characterized in that, It includes a boiler, an electrolysis water device, a fuel reactor, an air reactor, a first blower, a second blower, a semi-coke pulverizing system, a semi-gasification stable combustion burner, and a sludge pulverizing system; the redundant power generated by renewable energy power generation supplies power to the electrolysis water device, which is used to generate oxygen and hydrogen; The first inlet of the fuel reactor is connected to the hydrogen outlet of the water electrolysis device, so that the hydrogen reduces the metal oxides in the fuel reactor to a metal carrier and generates steam. The first inlet of the air reactor is connected to the first outlet of the fuel reactor, so that the metal carrier undergoes an oxidation reaction in the air reactor to generate metal oxides and release heat. The first outlet of the air reactor is connected to the second inlet of the fuel reactor to deliver the metal oxide to the fuel reactor; The inlet and outlet of the semi-coke pulverizing system are connected to the air outlet of the first blower and the inlet of the semi-gasification stable combustion burner, respectively, so as to send the gasification background gas into the semi-coke pulverizing system and transport the semi-coke powder in the semi-coke pulverizing system to the semi-gasification stable combustion burner. The outlet of the semi-gasification stable combustion burner is connected to the nozzle of the stable combustion burner of the boiler, so as to mix the semi-coke powder and the gasification background gas and carry out a partial oxidation reaction before transporting them into the boiler for combustion. The inlet and outlet of the sludge pulverizing system are respectively connected to the air outlet of the second blower and the sludge burner nozzle of the boiler, so as to use primary air to dry the sludge powder in the sludge pulverizing system and transport the sludge powder to the boiler for combustion.
2. The system for chemical looping combustion coupled with co-firing of semi-coke sludge in coal-fired power units according to claim 1, characterized in that, The second inlet and the second outlet of the air reactor are respectively connected to the air outlet of the first blower and the inlet of the semi-coke pulverizing system, so as to preheat the gasification background gas using the air reactor and then deliver it to the semi-coke pulverizing system.
3. The system for chemical looping combustion coupled with co-firing of semi-coke sludge in coal-fired power units according to claim 1, characterized in that, The third inlet and third outlet of the air reactor are respectively connected to the air outlet of the second blower and the inlet of the sludge pulverizing system, so that the primary air is preheated by the air reactor and then sent into the sludge pulverizing system.
4. The system for chemical looping combustion coupled with co-firing of semi-coke sludge in coal-fired power units according to claim 3, characterized in that, The system also includes an air preheater, the inlet and outlet of which are connected to the air outlet of the second fan and the third inlet of the air reactor, respectively, so that the primary air is preheated by the air preheater and then sent to the air reactor for secondary preheating.
5. The system for chemical looping combustion coupled with co-firing of semi-coke sludge in coal-fired power units according to claim 1, characterized in that, The system further includes a first gas mixer, the first inlet, the second inlet and the outlet of the first gas mixer being connected to the air outlet of the first blower, the second outlet of the fuel reactor and the inlet of the semi-coke pulverizing system, respectively, so as to mix the gasification background gas and the steam in the first gas mixer and then send them into the semi-coke pulverizing system.
6. The system for chemical looping combustion coupled with co-firing of semi-coke sludge in coal-fired power units according to claim 1, characterized in that, The system also includes a condenser and a water storage tank; The inlet and outlet of the condenser are connected to the third outlet of the fuel reactor and the inlet of the water storage tank, respectively, so as to cool the steam into water and store it in the water storage tank.
7. A method for co-firing semi-coke sludge in a chemical looping combustion coupled coal-fired power unit, applicable to the system for co-firing semi-coke sludge in a chemical looping combustion coupled coal-fired power unit as described in any one of claims 1-6, characterized in that, include: The redundant power generated by renewable energy generation is used to power the water electrolysis device, enabling the device to generate oxygen and hydrogen. The water electrolysis device introduces hydrogen gas into the fuel reactor, whereby the hydrogen gas reduces the metal oxides in the fuel reactor to a metal carrier and generates steam. The first blower sends the gasification background gas into the semi-coke pulverizing system and uses the gasification background gas to send the semi-coke powder in the semi-coke pulverizing system into the semi-gasification stable combustion burner. The semi-gasification stable combustion burner mixes the semi-coke powder and the gasification background gas and performs a partial oxidation reaction before delivering it to the boiler for combustion. The second blower sends primary air into the sludge pulverizing system and uses the primary air to send the sludge powder in the sludge pulverizing system into the boiler as fuel.
8. The method according to claim 7, characterized in that, Before the gasification background gas is fed into the semi-coke pulverizing system, the gasification background gas is preheated by the air reactor.
9. The method according to claim 7, characterized in that, Before the gasification background gas is fed into the semi-coke pulverizing system, the gasification background gas is mixed with the steam generated by the fuel reactor.
10. The method according to claim 7, characterized in that, Before the primary air is sent into the sludge pulverizing system, the primary air is preheated sequentially by an air preheater and an air reactor.