A coal-fired power generation system and method for coupling manure and sludge

Abstract

The application discloses a coal power unit coupling excrement and sludge power generation system and method, and belongs to the technical field of urban and rural organic waste resource utilization. The system comprises an excrement pretreatment system, a sludge pretreatment system, a waste liquid treatment device, a mixture conveying system, a coal powder bin, a boiler and a steam turbine. Liquid outlets of the excrement pretreatment system and the sludge pretreatment system are connected with inlets of the waste liquid treatment device respectively. Solid outlets of the excrement pretreatment system and the sludge pretreatment system are connected with inlets of the mixture conveying system respectively. An outlet of the coal powder bin is connected with an outlet of the mixture conveying system through a pipeline, and then connected with the boiler and the steam turbine in sequence. Waste heat outlets of the boiler and the steam turbine are connected with the waste liquid treatment device through pipelines respectively. An outlet of the waste liquid treatment device is connected with the mixture conveying system. The system solves the technical problem of poor utilization effect of urban and rural organic waste.

Description

Technical Field

[0001] The present invention belongs to the technical field of resource utilization of urban and rural organic waste, and specifically relates to a coal-fired power generation system and method coupled with manure and sludge. Background Art

[0002] Urban and rural organic waste (such as manure and sludge) is an important pollutant generated in urban and rural life, but it contains a large amount of organic matter and has a high potential for resource utilization. The organic matter in manure and sludge is mainly composed of carbohydrates, proteins and fats, and its calorific value ranges from 15 to 20 MJ / kg (dry basis) and 10 to 15 MJ / kg (dry basis), respectively. Through thermochemical conversion (such as combustion), these organic substances can be converted into thermal energy for power generation or heating. In addition, the waste heat of flue gas generated by boiler combustion and the waste heat generated by the expansion work of steam turbines can be further recovered and used to heat waste liquids or dry solid mixtures, forming an energy recycling system, thereby achieving efficient resource utilization and pollution reduction.

[0003] Traditional methods for treating urban and rural organic waste primarily include landfilling, composting, and incineration. However, these methods have the following limitations: 1) Landfilling: Landfilling has a long treatment cycle, typically requiring years or even decades for complete degradation. Furthermore, methane (CH4) produced during the landfilling process is a potent greenhouse gas with a global warming potential 28 to 36 times that of carbon dioxide (CO2). According to statistics, methane generated by landfills accounts for 3 to 5% of global greenhouse gas emissions. Furthermore, landfilling consumes significant land resources and may contaminate groundwater and soil. 2) Composting: While composting can transform organic waste into fertilizer, it has a long treatment cycle (typically 2 to 6 months) and is sensitive to the waste composition, making it difficult to treat sludge containing heavy metals or other hazardous substances. Furthermore, gases such as ammonia (NH3) and hydrogen sulfide (H2S) produced during the composting process can cause secondary environmental pollution. For example, NH3 emissions during composting can reach 0.5 to 1.5 kg per ton of waste, negatively impacting the atmospheric environment. 3) Incineration: Incineration can quickly reduce the volume of waste (reduction rate can reach over 90%), but traditional incineration technology has problems such as incomplete combustion and low calorific value utilization (usually less than 30%). In addition, the incineration process is prone to produce harmful substances such as dioxins and heavy metals, which pose a serious threat to the environment and human health. For example, the emission concentration of dioxins during incineration can reach 0.1-1.0 ng TEQ / m 3, far exceeding environmental protection standards. 4) Conveying blockage problem: Manure and sludge are very viscous, and traditional conveying systems are prone to blockage during the conveying process, affecting the continuous and stable operation of the system. For example, when conveying manure and sludge with a high moisture content (>60%), the blockage rate of traditional screw conveyors is as high as 20-30%. 5) Energy waste: Traditional technologies fail to fully utilize boiler flue gas and turbine waste heat, resulting in a large amount of energy waste. According to statistics, boiler flue gas waste heat accounts for 10-15% of the total calorific value of the fuel, while turbine waste heat accounts for 5-10% of the total calorific value of the fuel. Taking a 300MW coal-fired power unit as an example, the unused waste heat is equivalent to the waste of approximately 15,000 to 20,000 tons of standard coal each year.

[0004] In recent years, researchers have attempted to improve organic waste treatment technologies through the following methods: 1) Co-combustion: Combusting manure and sludge with pulverized coal to improve energy efficiency. However, due to the high moisture content of manure and sludge (typically 60-80%), direct co-combustion results in incomplete combustion and low calorific value utilization. For example, direct combustion of undried manure and sludge yields only 20-30% calorific value. 2) Pretreatment: Pretreatment techniques such as solid-liquid separation, crushing, and drying can be used to reduce the moisture content of manure and sludge. For example, solid-liquid separation can reduce the moisture content of manure from 90% to 60-70%, and drying can further reduce it to 10-15%. However, traditional drying techniques consume a lot of energy and fail to fully utilize waste heat resources. For example, traditional hot air drying consumes approximately 800-1000 kWh / ton, making it less economical. 3) Waste heat recovery: Efforts are underway to recover boiler flue gas and steam turbine waste heat for heating waste liquids or drying solid mixtures. However, traditional waste heat recovery systems are inefficient and fail to fully realize their energy recovery potential. For example, the thermal efficiency of traditional waste heat recovery systems is only 40-50%, leaving much room for improvement. Summary of the Invention

[0005] The purpose of the present invention is to provide a coal-fired power generation system and method coupled with manure and sludge to solve the technical problem of poor utilization of existing urban and rural organic waste.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] The present invention discloses a coal-fired power generation system coupled with manure and sewage, and sludge, comprising: a manure pretreatment system, a sludge pretreatment system, a waste liquid treatment device, a mixture conveying system, a pulverized coal silo, a boiler and a steam turbine; the liquid outlets of the manure pretreatment system and the sludge pretreatment system are respectively connected to the inlet of the waste liquid treatment device; the solid outlets of the manure pretreatment system and the sludge pretreatment system are respectively connected to the inlet of the mixture conveying system; the outlet of the pulverized coal silo and the outlet of the mixture conveying system are merged through a pipeline and then connected to the boiler and the steam turbine in sequence; the waste heat outlets of the boiler and the steam turbine are respectively connected to the waste liquid treatment device through pipelines; and the outlet of the waste liquid treatment device is connected to the mixture conveying system.

[0008] Furthermore, the manure pretreatment system includes a manure receiving device and a solid-liquid separation device connected in sequence; the liquid outlet of the solid-liquid separation device is connected to the inlet of the waste liquid treatment device; and the solid outlet of the solid-liquid separation device is connected to the inlet of the mixture conveying system.

[0009] Furthermore, the inlet of the manure receiving device is connected to a manure source.

[0010] Furthermore, the sludge pretreatment system includes a sludge receiving device and a sludge crushing device connected in sequence; the liquid outlet of the sludge crushing device is connected to the inlet of the waste liquid treatment device; and the solid outlet of the sludge receiving device is connected to the inlet of the mixture conveying system.

[0011] Furthermore, the inlet of the sludge receiving device is connected to a sludge source.

[0012] Furthermore, the mixture conveying system includes a drying device, a forming device and a screw conveyor connected in sequence; the solid outlets of the solid-liquid separation device and the sludge crushing device are respectively connected to the inlet of the drying device; the outlet of the waste liquid treatment device is connected to the drying device; the outlet of the screw conveyor and the outlet of the mixture conveying system are merged through a pipeline and are connected to the boiler and the steam turbine in sequence.

[0013] Furthermore, a first pressurizing port is connected between the forming device and the screw conveyor.

[0014] Furthermore, the outlet of the screw conveyor is connected to the outlet of the pulverized coal bin through a pipeline and then connected to the boiler and the steam turbine in sequence through a screw feeder.

[0015] Furthermore, a second boost port is connected between the pulverized coal bin and the screw feeder.

[0016] The present invention also discloses a method for using the above-mentioned coal-fired power generation unit coupled with manure and sludge power generation system, which comprises the following steps:

[0017] The external manure and sludge are respectively transported to the manure pretreatment system and the sludge pretreatment system for pretreatment, the waste liquid obtained from the manure pretreatment system and the sludge pretreatment system is transported to the waste liquid treatment device, and the obtained solid matter is transported to the mixture conveying system for processing and forming, and then mixed with the coal powder in the coal powder bin and passed into the boiler and steam turbine in turn for combustion and power generation; the waste heat generated in the boiler and steam turbine during the power generation process enters the waste liquid treatment device through the waste heat outlet, and is used to heat the waste liquid in the waste liquid treatment device, providing a heating medium for the mixture conveying system.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention discloses a coal-fired power generation system coupled with manure and sludge. By arranging a manure pretreatment system, a sludge pretreatment system, a waste liquid treatment device, a mixture conveying system, a pulverized coal silo, a boiler and a steam turbine, the coordinated incineration of manure, sludge and coal-fired power projects is achieved, which significantly improves the resource utilization rate; at the same time, the waste heat generated during the incineration process and the waste liquid obtained from the pretreatment of manure and sludge are utilized as heating media for drying the solid mixture, which significantly reduces the drying energy consumption; through the integrated processing setting, the system not only reduces the drying energy consumption and improves the waste utilization effect, but also reduces greenhouse gas emissions, and has significant environmental and economic benefits.

[0020] Furthermore, boost ports are provided at the front end of the screw conveyor and the front end of the screw feeder, which effectively solves the blockage problem during the transportation process, effectively prevents the solid mixture of coal powder, manure and sludge from being blocked during the transportation process, ensures that the mixture is evenly transported to the boiler, and improves the stability of the entire system.

[0021] The present invention also discloses a method for coupling the above-mentioned coal-fired power generation unit with a manure and sludge power generation system. Simulation experimental results theoretically demonstrate that the system reduces the moisture content of manure and sludge to 10-15% through pretreatment, and then mixes it with pulverized coal in a 1:4 ratio for combustion, thereby improving calorific value utilization. The system also utilizes boiler flue gas and steam turbine waste heat to heat waste liquid to 80-90°C for use in drying the solid mixture, effectively reducing drying energy consumption. A boost port is provided at the front end of the screw conveyor to prevent blockage of the solid mixture of coal, manure, and sludge during conveyance, thereby improving system operation stability. The boost port is also provided at the front end of the screw feeder to reduce fuel waste caused by blockage and effectively improve combustion efficiency. A scheme for recovering and reusing boiler flue gas waste heat to heat waste liquid to 80-90°C significantly improves energy utilization efficiency. For example, a 300MW coal-fired power unit can recover approximately 15,000 to 20,000 tons of standard coal equivalent of flue gas waste heat annually; for a 300MW steam turbine, approximately 28,000 tons of standard coal equivalent of exhaust steam waste heat can be recovered annually. The optimized system improves the overall thermal efficiency and has significant economic and environmental benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is the overall structural diagram of the coal-fired power generation system coupled with manure and sludge;

[0023] Among them: 1-manure pretreatment system; 2-manure receiving device; 3-solid-liquid separation device; 4-sludge pretreatment system; 5-sludge receiving device; 6-sludge crushing device; 7-mixture conveying system; 8-drying device; 9-forming device; 10-first boost port; 11-forming device; 12-screw feeder; 13-second boost port; 14-coal powder silo; 15-boiler; 16-steam turbine; 17-waste liquid treatment device. DETAILED DESCRIPTION

[0024] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0025] It should be noted that the terms "first", "second" and the like in the description and in the claims of the present application and in the above-described drawings are used to distinguish similar objects and not necessarily describe a particular sequential or chronological order. It should be understood that the data thus used can be interchanged, where appropriate, so that the embodiments of the application described herein can be implemented in orders other than those illustrated or described herein. In addition, the terms "comprising" and "having" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or apparatus that includes a list of steps or units is not necessarily limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to such processes, methods, products or apparatuses.

[0026] The application discloses a coal power unit coupled with excrement and sludge power generation system, comprising: excrement pretreatment system 1, sludge pretreatment system 4, waste liquid treatment device 17, mixture conveying system 7, coal powder bin 14, boiler 15 and steam turbine 16; wherein the excrement pretreatment system 1 and the sludge pretreatment system 4 are used for pretreating excrement and sludge from the outside, the excrement is separated into waste liquid and solid matter by entering the excrement pretreatment system 1 through the excrement source; the sludge is separated into waste liquid and solid matter by entering the sludge pretreatment system 4 through the sludge source; the waste liquid therein enters the waste liquid treatment device 17 and is used as a heating medium for drying the excrement and sludge solid mixture; the solid matter is collected through a pipeline and then enters the sludge pretreatment system 4 for processing and molding, and then is mixed with the coal powder from the coal powder bin 14 and is sequentially conveyed to the boiler 15 and the steam turbine 16 for combustion and power generation; the waste heat in the boiler 15 and the steam turbine 16 is conveyed to the waste liquid treatment device 17 through a waste heat outlet to heat the waste liquid, which is used as a heating medium for drying the solid mixture in the sludge pretreatment system 4.

[0027] Preferably, the excrement pretreatment system 1 comprises an excrement receiving device 2 and a solid-liquid separation device 3 connected in sequence; the sludge pretreatment system 4 comprises a sludge receiving device 5 and a sludge crushing device 6 connected in sequence; and the mixture conveying system 7 comprises a drying device 8, a molding device 9 and a screw conveyor 11 connected in sequence.

[0028] Preferably, since the traditional conveying system has a blockage rate of 20-30% when conveying excrement and sludge with high water content (>60%), which seriously affects the continuous operation of the system, the first booster port 10 is arranged between the molding device 9 and the screw conveyor 11, which effectively solves the blockage problem in the conveying process and reduces the blockage rate to below 5%; taking a 300MW coal power unit as an example, the downtime caused by blockage can be reduced by about 200 hours per year, and the system operation efficiency is improved by 10-15%; the arrangement of the first booster port 10 not only reduces the maintenance cost, but also ensures the stable conveying of the solid mixture and provides reliable guarantee for subsequent mixed combustion.

[0029] Preferably, since traditional feeding systems are prone to blockage due to material accumulation when conveying highly viscous mixtures, thereby affecting combustion efficiency and system stability, the present invention provides a second boost port 13 connected between the pulverized coal bin 14 and the screw feeder 12 to prevent blockage of the solid mixture of pulverized coal, excrement, and sludge during conveying, thereby ensuring that the mixture is evenly conveyed to the boiler; taking a 300MW coal-fired power unit as an example, the fuel waste caused by blockage can be reduced by approximately 1,000 tons per year, and the combustion efficiency can be improved by 5 to 10%; the provision of the second boost port 13 not only improves the reliability of the system, but also reduces fuel costs and maintenance expenses.

[0030] Preferably, conventional technology fails to fully utilize the waste heat of boiler flue gas (accounting for 10-15% of the total calorific value of the fuel), resulting in a large amount of energy waste; the present invention recovers the waste heat of the flue gas of the boiler 15 and uses it to heat the waste liquid in the waste liquid treatment device 17 to 80-90°C, thereby significantly improving energy utilization efficiency; taking a 300MW coal-fired power unit as an example, about 15,000 to 20,000 tons of standard coal can be recovered from the flue gas waste heat each year, saving about 3 million to 5 million yuan in fuel costs; the recovery and utilization of the flue gas waste heat not only reduces the drying energy consumption, but also reduces greenhouse gas emissions, with significant environmental and economic benefits.

[0031] Preferably, conventional technology fails to fully utilize the waste heat of the steam turbine (accounting for 5-10% of the total calorific value of the fuel), resulting in energy waste; the present invention recovers the waste heat generated by the expansion work of the steam turbine 16 and uses it to heat the waste liquid in the waste liquid treatment device 17 to 80-90°C, thereby further improving energy utilization efficiency; taking a 300MW coal-fired power unit as an example, about 8,000 to 10,000 tons of standard coal of steam turbine waste heat can be recovered each year, saving about 2 to 3 million yuan in fuel costs; the recovery and utilization of steam turbine waste heat not only realizes multi-level utilization of energy, but also improves the overall thermal efficiency of the system to more than 70%, with significant economic and environmental benefits.

[0032] Preferably, traditional drying technology (such as hot air drying) has high energy consumption, about 800 to 1000 kWh / ton, and fails to fully utilize waste liquid resources; the present invention significantly reduces drying energy consumption by using the waste liquid in the waste liquid treatment device 17 as a heating medium for drying the solid mixture in the drying device 8.

[0033] Preferably, the various devices in the system of the present application work in coordination, and the resource utilization rate is significantly improved by co-combustion of the fecal sewage and sludge with coal powder. In the conventional technology, the fecal sewage and sludge have a low direct combustion efficiency due to a high water content (60-80%), and the heat value utilization rate is only 20-30%, and harmful substances such as dioxin and heavy metals are easily produced; in the present application, the water content of the fecal sewage and sludge is reduced to 10-15% through pretreatment, and the fecal sewage and sludge are mixed with coal powder at a ratio of 1:4 for combustion, so that the heat value utilization rate is increased to more than 80%; taking a 300 MW coal power unit as an example, 100,000 tons of fecal sewage and sludge can be treated per year, CO2 emission is reduced by 50-80 thousand tons, and coal combustion cost is saved by about 5-8 million yuan. The co-combustion not only realizes efficient treatment of organic waste, but also reduces the emission of harmful substances produced by traditional incineration, and has significant environmental and economic benefits.

[0034] The present application will be further described in detail below with reference to the accompanying drawings:

[0035] Example 1

[0036] Referring to Figure 1 As shown in the figure, the present embodiment provides a coal power unit coupled with fecal sewage and sludge power generation system, which comprises a fecal sewage pretreatment system 1 and a sludge pretreatment system 4. In order to pretreat the fecal sewage and sludge from the outside, the fecal sewage enters the fecal sewage pretreatment system 1 through a fecal sewage source and is separated into waste liquid and solid matter; the sludge enters the sludge pretreatment system 4 through a sludge source and is separated into waste liquid and solid matter; the solid matter enters a drying device 8 and is used as fecal sewage fuel; the waste liquid is used as a heating medium for drying the fecal sewage and sludge solid mixture; specifically, the sludge is transported to a sludge crushing device 6 through a pipeline, the solid matter in the sludge is transported into the drying device 8 through a pipeline after being crushed and separated, and enters a mixture conveying system 7 as sludge fuel.

[0037] Example 2

[0038] Referring to Figure 1 As shown in the figure, the present embodiment provides a coal power unit coupled with fecal sewage and sludge power generation system, which comprises a mixture conveying system 7. In order to improve the heat value and combustibility of the fecal sewage and sludge solid mixture, the fecal sewage and sludge solid mixture is dried by the drying device 8 and then conveyed into a forming device 9 for forming processing according to the requirements of mixing and combustion with coal powder; the fecal sewage and sludge solid mixture after forming processing is conveyed into a screw conveyor 11 through a pipeline, the fecal sewage and sludge solid mixture is conveyed to the screw feeder 11 to realize sufficient mixing with coal powder, and finally the coal powder and the fecal sewage and sludge solid mixture are used as the combustion medium of the boiler 15;

[0039] In order to prevent the screw conveyor 11 from being blocked when conveying a mixture of feces, sewage, and sludge solids, a first boost port 10 is reserved in the screw conveyor 11. When a pipe is blocked, an external high-pressure delivery pump is connected to clear the pipe with high pressure.

[0040] Example 3

[0041] See also Figure 1 As shown, this embodiment provides a coal-fired power generation system coupled with manure and sludge, including a pulverized coal bin 14. The pulverized coal in the pulverized coal bin 14 is transmitted to a screw feeder 12, and after being fully mixed with the formed manure and sludge solid mixture, it is transmitted as a mixed combustible to a boiler 15 for combustion to generate steam. The steam is then transported through a pipeline to a steam turbine 16 for power generation.

[0042] In order to reuse the waste heat generated by the flue gas of the boiler 15, it is mainly used to heat the liquid after the solid-liquid separation of feces and sewage treated by the waste liquid treatment device 17 and the waste liquid generated by the sludge crushing device 6, and is used as a heat transfer medium to dry the solid matter after the solid-liquid separation of feces and sewage and the solid matter generated by the sludge crushing device.

[0043] The present invention achieves efficient treatment of manure and sludge, as well as recovery and reuse of waste heat from coal-fired power projects through the coordinated treatment of manure and sludge, thereby reducing pollution, lowering fuel costs, improving energy efficiency, and solving the problem of blockage in raw material transportation.

[0044] The above content is only for explaining the technical idea of ​​the present invention and cannot be used to limit the protection scope of the present invention. Any changes made on the basis of the technical solution in accordance with the technical idea proposed by the present invention shall fall within the protection scope of the claims of the present invention.

Claims

1. A coal-fired power generation system coupled with manure and sludge, characterized in that: include: A manure pretreatment system (1), a sludge pretreatment system (4), a waste liquid treatment device (17), a mixture conveying system (7), a pulverized coal bin (14), a boiler (15) and a steam turbine (16); the liquid outlets of the manure pretreatment system (1) and the sludge pretreatment system (4) are respectively connected to the inlet of the waste liquid treatment device (17); the solid outlets of the manure pretreatment system (1) and the sludge pretreatment system (4) are respectively connected to the inlet of the mixture conveying system (7); the outlet of the pulverized coal bin (14) is connected to the inlet of the mixture conveying system The outlets of the system (7) are connected to the boiler (15) and the steam turbine (16) in sequence after being merged through pipelines; the waste heat outlets of the boiler (15) and the steam turbine (16) are respectively connected to the waste liquid treatment device (17) through pipelines; the outlet of the waste liquid treatment device (17) is connected to the mixture conveying system (7); the waste heat generated in the boiler (15) and the steam turbine (16) enters the waste liquid treatment device (17) through the waste heat outlet, and is used to heat the waste liquid in the waste liquid treatment device (17), thereby providing a heating medium for the mixture conveying system (7).

2. A coal-fired power generation system coupled with manure and sludge according to claim 1, characterized in that: The manure pretreatment system (1) comprises a manure receiving device (2) and a solid-liquid separation device (3) connected in sequence; the liquid outlet of the solid-liquid separation device (3) is connected to the inlet of a waste liquid treatment device (17); and the solid outlet of the solid-liquid separation device (3) is connected to the inlet of a mixture conveying system (7).

3. The coal-fired power generation system coupled with manure and sludge according to claim 2 is characterized in that: The inlet of the manure receiving device (2) is connected to a manure source.

4. The coal-fired power generation system coupled with manure and sludge according to claim 2 is characterized in that: The sludge pretreatment system (4) comprises a sludge receiving device (5) and a sludge crushing device (6) connected in sequence; the liquid outlet of the sludge crushing device (6) is connected to the inlet of the waste liquid treatment device (17); and the solid outlet of the sludge receiving device (5) is connected to the inlet of the mixture conveying system (7).

5. The coal-fired power generation system coupled with manure and sludge according to claim 4 is characterized in that: The inlet of the sludge receiving device (5) is connected to the sludge source.

6. A coal-fired power generation system coupled with manure and sludge according to claim 5, characterized in that: The mixture conveying system (7) comprises a drying device (8), a forming device (9) and a screw conveyor (11) which are connected in sequence; the solid outlets of the solid-liquid separation device (3) and the sludge crushing device (6) are respectively connected to the inlet of the drying device (8); the outlet of the waste liquid treatment device (17) is connected to the drying device (8); the outlet of the screw conveyor (11) and the outlet of the mixture conveying system (7) are merged through a pipeline and are then connected to the boiler (15) and the steam turbine (16) in sequence.

7. The coal-fired power generation system coupled with manure and sludge according to claim 6 is characterized in that: A first pressurizing port (10) is connected between the forming device (9) and the screw conveyor (11).

8. The coal-fired power generation system coupled with manure and sludge according to claim 6 is characterized in that: The outlet of the screw conveyor (11) is connected to the outlet of the pulverized coal bin (14) through a pipeline and then connected to the boiler (15) and the steam turbine (16) in sequence through the screw feeder (12).

9. The coal-fired power generation system coupled with manure and sludge according to claim 6 is characterized in that: A second pressurizing port (13) is connected between the pulverized coal bin (14) and the screw feeder (12).

10. The method for using a coal-fired power generation unit coupled with manure and sludge power generation system according to any one of claims 1 to 9, characterized in that: The following steps are involved: The external manure and sludge are respectively transported to the manure pretreatment system (1) and the sludge pretreatment system (4) for pretreatment, the waste liquid obtained from the manure pretreatment system (1) and the sludge pretreatment system (4) is transported to the waste liquid treatment device (17), and the obtained solid matter is transported to the mixture conveying system (7) for processing and forming, and then mixed with the coal powder in the coal powder bin (14) and sequentially introduced into the boiler (15) and the steam turbine (16) for combustion and power generation; the waste heat generated in the boiler (15) and the steam turbine (16) during the power generation process enters the waste liquid treatment device (17) through the waste heat outlet, and is used to heat the waste liquid in the waste liquid treatment device (17), thereby providing a heating medium for the mixture conveying system (7).

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