Solid waste direct combustion coupling power generation system of circulating fluidized bed boiler

Abstract

The invention provides a circulating fluidized bed boiler solid waste direct combustion coupling power generation system, and relates to the technical field of power generation. A slag return structure and a steam generation assembly are fixedly arranged between the furnace body and the smoke exhaust furnace; a steam reheating structure is fixedly arranged in the furnace body, and a water preheating assembly is fixedly arranged in the smoke exhaust furnace. An air inlet assembly is fixedly arranged between the bottom of the smoke exhaust furnace and the bottom of the furnace body, an auxiliary structure is fixedly arranged on the outer side of the air inlet assembly, through the water preheating assembly, the air inlet assembly and a slag returning structure, preheating in smoke can be effectively utilized, and energy waste is prevented; and meanwhile, sufficient combustion of solid waste can be ensured, the energy conversion efficiency is ensured, and the problems that a large amount of waste heat contained in smoke is directly dissipated to the atmospheric environment without being effectively utilized, and sufficient combustion of the solid waste is difficult to ensure in a traditional mode are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of power generation, and in particular to a circulating fluidized bed boiler solid waste direct combustion coupled power generation system. Background Art

[0002] With the rapid development of industry and the acceleration of urbanization, the amount of solid waste generated is increasing. How to deal with these solid wastes efficiently and environmentally friendly has become a major problem that needs to be solved urgently. Traditional solid waste treatment methods, such as landfill and incineration, have many disadvantages. Landfill not only occupies a large amount of land resources, but also may cause pollution to the soil and groundwater. Ordinary incineration methods often suffer from incomplete combustion when treating solid waste. At the same time, global energy demand continues to grow, and the increasing depletion of traditional fossil energy and the environmental pollution problems it brings have prompted people to continuously explore new energy utilization methods and ways to improve energy utilization efficiency. Circulating fluidized bed boilers, as an efficient and clean combustion equipment, have significant advantages in the field of energy utilization. They have the characteristics of wide fuel adaptability, high combustion efficiency, and low pollutant emissions. They can burn a variety of fuels, including coal, biomass and some solid waste.

[0003] Traditional power generation systems generally face the dilemma of low energy utilization efficiency; during boiler operation, the exhaust gas temperature remains high, and a large amount of waste heat contained in the flue gas is directly dissipated into the atmosphere without being effectively utilized, causing serious energy waste; at the same time, when it comes to solid waste treatment, traditional methods are difficult to ensure the full combustion of solid waste, and a large amount of combustible materials fail to fully release chemical energy, which not only reduces the energy conversion efficiency, but may also produce more pollutants due to incomplete combustion, further aggravating the environmental burden. Summary of the Invention

[0004] In view of this, the present invention provides a circulating fluidized bed boiler solid waste direct combustion coupled power generation system, which has a water preheating component, an air intake component and a slag return structure, which can form a high-efficiency energy recovery and combustion optimization system; the water preheating component cleverly uses the waste heat of the flue gas to preheat the feed water, deeply taps the potential energy in the flue gas, avoids the energy loss with the flue gas, and significantly improves the energy utilization efficiency; the air intake component creates a uniform and suitable combustion environment in the furnace through scientific airflow distribution design; and the slag return structure is used to return the unburned ash to the furnace to participate in combustion. The three work together to ensure that the solid waste can be fully burned and its chemical energy is released to the maximum extent, effectively ensuring the efficient conversion of energy.

[0005] The present invention provides a circulating fluidized bed boiler solid waste direct combustion coupled power generation system, specifically comprising: a furnace body and a smoke exhaust furnace; a slag return structure and a steam generating assembly are fixedly arranged between the furnace body and the smoke exhaust furnace; a steam reheating structure is fixedly arranged inside the furnace body, and a water preheating assembly is fixedly arranged inside the smoke exhaust furnace; an air intake assembly is fixedly arranged between the bottom of the smoke exhaust furnace and the bottom of the furnace body, and an auxiliary structure is fixedly arranged on the outside of the air intake assembly; A preheating tube is fixedly provided on one side of the bottom of the smoke exhaust furnace, and a smoke exhaust tube is fixedly provided inside one side of the preheating tube; the smoke exhaust tube is connected to the smoke processor through a pipe, and a smoke inlet pipe is fixedly provided on the top of the smoke exhaust furnace; the air intake assembly includes: an air inlet pipe, an air collecting hood and a fan; the air inlet pipe is fixedly provided between the smoke exhaust furnace and the inside of the preheating tube, and one end of the air inlet pipe is fixedly provided inside the furnace body; the air collecting hood is fixedly provided at the other end of the air inlet pipe; the fan is fixedly provided on the outside of the other end of the air collecting hood; a support frame is fixedly provided inside the bottom side of the furnace body, and the support frame is located above the end of the air inlet pipe; a wind hood is fixedly provided inside the support frame, and the wind hood is provided in a rectangular array.

[0006] In at least some embodiments, a feed pipe A and a feed pipe B are fixedly installed inside one side of the furnace body, and the feed pipe A is used to feed coal powder and solid waste, and the feed pipe B is used to feed limestone; the bottom ends of the feed pipe A and the feed pipe B are both located above the support frame.

[0007] In at least some embodiments, a smoke hood is fixedly provided inside the top side of the furnace body, and the smoke hood is configured as a cone structure; igniters are fixedly provided on both sides of the bottom of the furnace body, and the igniters are arranged in a straight line.

[0008] In at least some embodiments, the slag return structure includes: a mounting frame, a cyclone separator, a connecting pipe and a slag return barrel; the mounting frame is fixedly arranged between the furnace body and the smoke exhaust furnace; the cyclone separator is fixedly arranged inside the mounting frame, and the smoke inlet of the cyclone separator is fixedly connected to the smoke outlet hood; the connecting pipe is fixedly arranged between the smoke outlet of the cyclone separator and the smoke inlet pipe; the slag return barrel is fixedly arranged at the bottom of the slag outlet of the cyclone separator, and the bottom end of the slag return barrel is fixedly arranged inside the furnace body, and the bottom end of the slag return barrel is located above the support frame.

[0009] In at least some embodiments, the steam generating assembly includes: a steam drum, a water outlet pipe, a downpipe, a heating riser and a connecting pipe; the steam drum is fixedly arranged on the top of the furnace body; the water outlet pipe is fixedly arranged inside one side of the steam drum, and the main body of the water outlet pipe is arranged as a T-shaped structure; the downpipe is fixedly arranged at the bottom of both sides of the water outlet pipe; the heating riser is fixedly arranged inside both sides of the furnace body, and the top of the heating riser is fixedly arranged inside the steam drum, and the heating riser is arranged in a straight line; the connecting pipe is fixedly arranged at the bottom end of the heating riser, and the connecting pipe is fixedly connected to the bottom end of the downpipe.

[0010] In at least some embodiments, the steam generating assembly further includes: an air outlet pipe and a water inlet pipe; the air outlet pipe is fixedly arranged inside the top side of the steam drum; and the water inlet pipe is fixedly arranged inside one side of the steam drum.

[0011] In at least some embodiments, the water preheating assembly includes: a water supply pipe, a transverse pipe A, a connecting transverse pipe, a transverse pipe B and a preheating pipe; the water supply pipe is fixedly arranged inside one side of the smoke exhaust furnace; the transverse pipe A is fixedly arranged on the outside of the end of the water supply pipe; one end of the connecting transverse pipe is fixedly arranged inside one side of the smoke exhaust furnace, and the other end of the connecting transverse pipe is fixedly connected to the water inlet pipe; the transverse pipe B is fixedly arranged on the outside of the end of the connecting transverse pipe, and both the transverse pipe B and the transverse pipe A are located inside the smoke exhaust furnace; the preheating pipe is fixedly arranged between the transverse pipe A and the transverse pipe B.

[0012] In at least some embodiments, the steam reheating structure includes: a gas supply pipe, a fixed pipe A, an exhaust pipe, a fixed pipe B and a reheating pipe; the gas supply pipe is fixedly arranged at the end of the gas outlet pipe, and the bottom end of the gas supply pipe is fixedly arranged inside the furnace body; the fixed pipe A is fixedly arranged at the bottom end of the gas supply pipe; the exhaust pipe is fixedly arranged inside one side of the furnace body, and the exhaust pipe is connected to the steam turbine through a pipeline; the fixed pipe B is fixedly arranged on the outside of the end of the exhaust pipe; the reheating pipe is fixedly arranged between the fixed pipe A and the fixed pipe B, and the reheating pipe, the fixed pipe A and the fixed pipe B are all located inside the furnace body.

[0013] In at least some embodiments, the preheating tube and the reheating tube are arranged in a straight line, and both the preheating tube and the reheating tube are arranged in a serpentine structure; the preheating tube is used for preheating water, and the reheating tube is used for reheating steam.

[0014] In at least some embodiments, the auxiliary structure includes: a filter frame, a rotating shaft and a scraper; the filter frame is fixedly arranged on the outside of the fan, and a filter screen is fixedly arranged inside the filter frame; the rotating shaft is rotatably arranged inside the filter frame, and the rotating shaft is fixedly connected to the blade rotating shaft inside the fan; the scraper is fixedly arranged on the outside of the rotating shaft, and the outside of the scraper is in contact with the surface of the filter screen inside the filter frame.

[0015] Beneficial effects 1. The present invention, through the water preheating assembly provided in the smoke exhaust furnace and the ingenious layout of the water supply pipe, transverse pipe A, connecting transverse pipe, transverse pipe B and serpentine preheating pipe, enables the water supply to fully absorb the waste heat of the flue gas in the smoke exhaust furnace when flowing through the preheating pipe. This design effectively reduces the exhaust temperature, avoids the energy waste caused by a large amount of waste heat being directly discharged into the atmosphere with the flue gas, and improves the comprehensive utilization rate of energy.

[0016] 2. In the present invention, the cyclone separator in the slag return structure can separate the ash from the flue gas generated by combustion in the furnace body, and return the ash to the interior of the furnace body through the slag return tube; at the same time, in conjunction with the wind hoods arranged in a rectangular array on the support frame at the bottom side of the furnace body, the fuel particles and solid waste can be driven by the high-speed airflow to tumble up and down, forming a fluidized state, providing a good combustion environment for the ash and ensuring that the solid waste can be fully burned; this not only improves the energy conversion efficiency, but also reduces the pollutant emissions caused by incomplete combustion of solid waste, achieving the dual goals of environmental protection and energy utilization.

[0017] 3. In the present invention, the air inlet pipe, air collecting hood and fan of the air intake assembly work together to evenly deliver air into the furnace body; the design of the air collecting hood helps to concentrate and guide the airflow, so that the air can enter the furnace body more smoothly, ensuring the uniform supply of oxygen required for combustion; at the same time, the filter rack in the auxiliary structure filters the incoming air to prevent dust and other impurities from entering the furnace body and affecting combustion; the rotating shaft is fixedly connected to the fan blade shaft, driving the scraper to automatically clean the dust on the filter rack to prevent the filter from being clogged, thereby ensuring smooth air intake; these designs together improve the stability of combustion and reduce the combustion fluctuation problem caused by uneven air intake or filter clogging.

[0018] 4. The present invention enables the system to flexibly adjust the type and ratio of fuel according to actual conditions through the feed pipes A and B on one side of the furnace body. For example, when the supply of solid waste is sufficient, the amount of solid waste added can be increased; when the pH value in the furnace needs to be adjusted, an appropriate amount of limestone can be added. This design of flexible multi-fuel addition enhances the system's adaptability to different fuels, reduces dependence on a single fuel, and improves the system's operational flexibility and stability.

[0019] 5. The present invention can preheat the air in the air inlet pipe through the flue gas in the smoke exhaust furnace and the preheating cylinder, which is beneficial to increasing the temperature of the air entering the furnace body, making it easier for the fuel to reach the ignition point, accelerating the combustion reaction, improving the combustion efficiency, ensuring the full combustion of solid waste and other fuels, and releasing more heat energy; and the preheating of the air reduces the subsequent additional energy required to maintain the high temperature in the furnace, reducing energy consumption and operating costs, and providing a strong guarantee for the efficient, economical and stable operation of the power generation system.

[0020] 6. In the present invention, the steam generated by the drum enters the fixed pipe A through the outlet pipe and the gas transmission pipe, and then flows into the serpentine reheating pipe. Under the high-temperature environment in the furnace, the steam can further absorb heat, and the temperature and pressure are significantly increased. The reheated high-quality steam enters the steam turbine through the fixed pipe B and the exhaust pipe to perform work. Compared with ordinary steam, it can release more energy, thereby improving the power generation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments are briefly introduced below.

[0022] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0023] In the attached figure: Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0024] Figure 2 It is a schematic diagram of the internal structure of the furnace body of the present invention.

[0025] Figure 3 It is a schematic structural diagram of the heating riser and the reheating tube of the present invention.

[0026] Figure 4 It is a structural schematic diagram of the hood of the present invention.

[0027] Figure 5 It is a structural schematic diagram of the steam generating component and the water preheating component of the present invention.

[0028] Figure 6 It is a structural schematic diagram of the steam reheating structure of the present invention.

[0029] Figure 7 It is a schematic diagram of the outer surface structure of the steam drum of the present invention.

[0030] Figure 8 It is a structural schematic diagram of the slag return structure of the present invention.

[0031] Figure 9 It is a schematic diagram of the internal structure of the smoke exhaust furnace of the present invention.

[0032] Figure 10 It is a structural schematic diagram of the auxiliary structure of the present invention.

[0033] Reference Signs List 1. Furnace body; 101. Feed pipe A; 102. Feed pipe B; 103. Ignitor; 104. Support frame; 105. Air hood; 106. Smoke hood; 2. Smoke exhaust furnace; 201. Smoke inlet pipe; 202. Preheating tube; 203. Smoke exhaust pipe; 3. Slag return structure; 301. Mounting frame; 302. Cyclone separator; 303. Connecting pipe; 304. Slag return cylinder; 4. Steam generating assembly; 401. Steam drum; 402. Water outlet pipe; 403. Downpipe; 404. Heating riser; 405. Connecting pipe; 406. Air outlet pipe; 407. Water inlet pipe; 5. Water preheating assembly; 501. Water supply pipe; 502. Horizontal pipe A; 503. Connecting horizontal pipe; 504. Horizontal pipe B; 505. Preheating pipe; 6. Air intake assembly; 601. Air intake pipe; 602. Air collecting cover; 603. Fan; 7. Steam reheating structure; 701. Gas transmission pipe; 702. Fixed pipe A; 703. Exhaust pipe; 704. Fixed pipe B; 705. Reheating pipe; 8. Auxiliary structure; 801. Filter frame; 802. Rotating shaft; 803. Scraper. DETAILED DESCRIPTION

[0034] In order to make the purpose, scheme and advantages of the technical solution of the present invention more clear, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of specific embodiments of the present invention. Unless otherwise specified, the terms used herein have the common meanings in the art. The same reference numerals in the drawings represent the same components.

[0035] Example 1: Please refer to Figures 1 to 10 As shown: The present invention provides a circulating fluidized bed boiler solid waste direct combustion coupled power generation system, comprising a furnace body 1 and a smoke exhaust furnace 2; a slag return structure 3 and a steam generating assembly 4 are fixedly arranged between the furnace body 1 and the smoke exhaust furnace 2; a steam reheating structure 7 is fixedly arranged inside the furnace body 1, and a water preheating assembly 5 is fixedly arranged inside the smoke exhaust furnace 2; an air intake assembly 6 is fixedly arranged between the bottom of the smoke exhaust furnace 2 and the bottom of the furnace body 1, and an auxiliary structure 8 is fixedly arranged on the outside of the air intake assembly 6; the auxiliary structure 8 comprises: a filter frame 801, a rotating shaft 802 and a scraper 803; the filter frame 801 is fixedly arranged on the outside of the fan 603, and a filter screen is fixedly arranged on the inside of the filter frame 801; the rotating shaft 802 is rotatably arranged inside the filter frame 801, and the rotating shaft 802 is fixedly connected to the blade rotating shaft inside the fan 603; the scraper 803 is fixedly arranged on the outside of the rotating shaft 802, and the outside of the scraper 803 is in contact with the surface of the filter screen inside the filter frame 801; In the embodiment of the present disclosure, a preheating tube 202 is fixedly provided on one side of the bottom of the smoke exhaust furnace 2, and a smoke exhaust tube 203 is fixedly provided inside one side of the preheating tube 202; the smoke exhaust tube 203 is connected to the smoke processor through a pipeline, and a smoke inlet pipe 201 is fixedly provided on the top of the smoke exhaust furnace 2; the air intake assembly 6 includes: an air inlet pipe 601, an air collecting hood 602 and a fan 603; the air inlet pipe 601 is fixedly provided between the smoke exhaust furnace 2 and the inside of the preheating tube 202, and one end of the air inlet pipe 601 is fixedly provided inside the furnace body 1; the air collecting hood 602 is fixedly provided at the other end of the air inlet pipe 601; the fan 603 is fixedly provided on the outside of the other end of the air collecting hood 602; a support frame 104 is fixedly provided inside the bottom side of the furnace body 1, and the support frame 104 is located on the end of the air inlet pipe 601 The support frame 104 is provided with a hood 105 fixedly therein, and the hood 105 is arranged in a rectangular array; a feed pipe A101 and a feed pipe B102 are fixedly provided on one side of the furnace body 1, and the feed pipe A101 is used to feed coal powder and solid waste, and the feed pipe B102 is used to feed limestone; the bottom ends of the feed pipes A101 and B102 are both located above the support frame 104; a smoke hood 106 is fixedly provided on the top side of the furnace body 1, and the smoke hood 106 is provided in a conical structure; igniters 103 are fixedly provided on both sides of the bottom of the furnace body 1, and the igniters 103 are arranged in a straight line; the steam generating assembly 4 includes: a steam drum 401, a water outlet pipe 402, a downpipe 403, a heating riser 404 and a connecting pipe 405; the steam drum 4 01 is fixedly arranged on the top of the furnace body 1; the water outlet pipe 402 is fixedly arranged inside one side of the steam drum 401, and the main body of the water outlet pipe 402 is set to a T-shaped structure; the downpipe 403 is fixedly arranged at the bottom of both sides of the water outlet pipe 402; the heating vertical pipe 404 is fixedly arranged inside both sides of the furnace body 1, and the top of the heating vertical pipe 404 is fixedly arranged inside the steam drum 401, and the heating vertical pipe 404 is arranged in a straight line; the connecting pipe 405 is fixedly arranged at the bottom end of the heating vertical pipe 404, and the connecting pipe 405 is fixedly connected to the bottom end of the downpipe 403; the steam generating component 4 also includes: an air outlet pipe 406 and a water inlet pipe 407; the air outlet pipe 406 is fixedly arranged inside the top side of the steam drum 401; the water inlet pipe 407 is fixedly arranged inside one side of the steam drum 401; its The specific functions are as follows: the air inlet pipe 601, the air collecting hood 602 and the fan 603 of the air intake assembly 6 work together to evenly deliver air into the furnace body 1; the design of the air collecting hood 602 helps to concentrate and guide the airflow, so that the air can enter the furnace body 1 more smoothly, ensuring the uniform supply of oxygen required for combustion; at the same time, the filter rack 801 in the auxiliary structure 8 filters the incoming air to prevent dust and other impurities from entering the furnace body 1 and affecting combustion; the rotating shaft 802 is fixedly connected to the blade rotating shaft of the fan 603, driving the scraper 803 to automatically clean the dust on the filter rack 801 to prevent the filter from being clogged, ensuring smooth air intake; these designs together improve the stability of combustion and reduce combustion fluctuations caused by uneven air intake or filter clogging.

[0036] Example 2: Please refer to Figure 1 and Figure 8 As shown: Based on the first embodiment: the slag return structure 3 includes: a mounting frame 301, a cyclone separator 302, a connecting pipe 303 and a slag return barrel 304; the mounting frame 301 is fixedly arranged between the furnace body 1 and the smoke exhaust furnace 2; the cyclone separator 302 is fixedly arranged inside the mounting frame 301, and the smoke inlet of the cyclone separator 302 is fixedly connected to the smoke hood 106; the connecting pipe 303 is fixedly arranged between the smoke outlet of the cyclone separator 302 and the smoke inlet pipe 201; the slag return barrel 304 is fixedly arranged at the bottom of the slag outlet of the cyclone separator 302, and the bottom end of the slag return barrel 304 is fixedly arranged inside the furnace body 1, and the slag return barrel 30 The bottom end of the slag return structure 3 is located above the support frame 104; its specific function is as follows: the cyclone separator 302 in the slag return structure 3 can separate the ash from the flue gas generated by combustion in the furnace body 1, and return the ash to the interior of the furnace body 1 through the slag return cylinder 304; at the same time, in conjunction with the wind hood 105 arranged in a rectangular array on the support frame 104 at the bottom side of the furnace body 1, the fuel particles and solid waste can be driven by the high-speed airflow to tumble up and down, forming a fluidized state, providing a good combustion environment for the ash and ensuring that the solid waste can be fully burned; this not only improves the energy conversion efficiency, but also reduces the pollutant emissions caused by incomplete combustion of solid waste.

[0037] Example 3: Please refer to Figure 3 、 Figure 5 、 Figure 6 and Figure 9As shown: Based on the first and second embodiments, the water preheating assembly 5 includes: a water supply pipe 501, a transverse pipe A502, a connecting transverse pipe 503, a transverse pipe B504 and a preheating pipe 505; the water supply pipe 501 is fixedly arranged inside one side of the smoke exhaust furnace 2; the transverse pipe A502 is fixedly arranged on the outside of the end of the water supply pipe 501; one end of the connecting transverse pipe 503 is fixedly arranged inside one side of the smoke exhaust furnace 2, and the other end of the connecting transverse pipe 503 is fixedly connected to the water inlet pipe 407; the transverse pipe B504 is fixedly arranged on the outside of the end of the connecting transverse pipe 503 side, and the transverse pipe B504 and the transverse pipe A502 are both located inside the smoke exhaust furnace 2; the preheating pipe 505 is fixedly arranged between the transverse pipe A502 and the transverse pipe B504; the steam reheating structure 7 includes: a gas pipe 701, a fixed pipe A702, an exhaust pipe 703, a fixed pipe B704 and a reheating pipe 705; the gas pipe 701 is fixedly arranged at the end of the gas outlet pipe 406, and the bottom end of the gas pipe 701 is fixedly arranged inside the furnace body 1; the fixed pipe A702 is fixedly arranged at the bottom end of the gas pipe 701; the exhaust pipe 703 is fixedly arranged It is placed inside one side of the furnace body 1, and the exhaust pipe 703 is connected to the steam turbine through a pipeline; the fixed pipe B704 is fixedly arranged on the outside of the end of the exhaust pipe 703; the reheating pipe 705 is fixedly arranged between the fixed pipe A702 and the fixed pipe B704, and the reheating pipe 705, the fixed pipe A702 and the fixed pipe B704 are all located inside the furnace body 1; the preheating pipe 505 and the reheating pipe 705 are arranged in a straight line, and the preheating pipe 505 and the reheating pipe 705 are both arranged in a serpentine structure; the preheating pipe 505 is used to Water is preheated, and the reheating pipe 705 is used for reheating steam; its specific functions are as follows: the steam generated by the drum 401 enters the fixed pipe A702 through the outlet pipe 406 and the gas supply pipe 701, and then flows into the serpentine reheating pipe 705; under the high temperature environment in the furnace, the steam can further absorb heat, and the temperature and pressure are significantly increased; the reheated high-quality steam enters the steam turbine through the fixed pipe B704 and the exhaust pipe 703 to perform work, and compared with ordinary steam, it can release more energy, thereby improving the power generation efficiency.

[0038] Specific usage and function of this embodiment: In the present invention, coal powder and solid waste are fed into the furnace body 1 through the feed pipe A101, and limestone is fed into the furnace body 1 through the feed pipe B102, ensuring that the feeding amount meets the system operation requirements; the igniter 103 is started to ignite the fuel in the furnace body 1, so that the fuel begins to burn; the high-temperature flue gas generated by the combustion of the fuel rises and enters the cyclone separator 302 through the smoke hood 106 on the top of the furnace body 1; in the cyclone separator 302, the ash and other particulate matter in the flue gas are separated and fall back into the furnace body 1 through the slag return tube 304 to continue to participate in the combustion, while the separated The flue gas after preheating enters the smoke exhaust furnace 2 through the connecting pipe 303 and the smoke inlet pipe 201; the smoke flows in the smoke exhaust furnace 2 and the preheating cylinder 202, forming a stable smoke circulation; the fan 603 is started, and the air is sucked into the air inlet pipe 601 through the wind collecting cover 602. During the flow inside the smoke exhaust furnace 2 and the preheating cylinder 202, the air exchanges heat with the high-temperature smoke, and the temperature gradually increases; the preheated air enters the furnace body 1 evenly through the wind cap 105, which can make the fuel particles and solid waste tumble up and down under the drive of the high-speed airflow, forming a fluidized state; providing sufficient oxygen for the fuel combustion, promoting the progress of the combustion reaction During operation, the air intake can be controlled by adjusting the speed of the fan 603 according to actual needs; the filter frame 801 filters the incoming air to prevent dust and other impurities from entering the furnace body 1 and affecting combustion; the rotating shaft 802 is fixedly connected to the fan 603 blade shaft, driving the scraper 803 to automatically clean the dust on the filter frame 801 to prevent the filter from being blocked and ensure smooth air intake; the water in the water supply pipe 501 enters the horizontal pipe A502 in the smoke exhaust furnace 2, and then flows into the horizontal pipe B504 through the preheating pipe 505, and then enters the steam drum 401 through the connecting horizontal pipe 503 and the water inlet pipe 407; in the preheating pipe 5 In 05, the water exchanges heat with the high-temperature flue gas in the smoke exhaust furnace 2, and the temperature rises to achieve preheating; the water in the steam drum 401 flows into the heating vertical pipe 404 through the downcomer 403 and the connecting pipe 405, and the water in the heating vertical pipe 404 absorbs the heat generated by the combustion, gradually heats up and vaporizes to form steam; the steam rises and enters the steam drum 401, enters the gas transmission pipe 701 through the outlet pipe 406, and then enters the reheating pipe 705; in the reheating pipe 705, the steam absorbs the high-temperature heat in the furnace again, and the temperature further rises, and finally enters the steam turbine through the exhaust pipe 703, driving the steam turbine to generate power.

Claims

1. A circulating fluidized bed boiler solid waste direct combustion coupled power generation system, characterized in that: include: A furnace body (1) and a smoke exhaust furnace (2); a slag return structure (3) and a steam generating assembly (4) are fixedly provided between the furnace body (1) and the smoke exhaust furnace (2); a steam reheating structure (7) is fixedly provided inside the furnace body (1), and a water preheating assembly (5) is fixedly provided inside the smoke exhaust furnace (2); an air intake assembly (6) is fixedly provided between the bottom of the smoke exhaust furnace (2) and the bottom of the furnace body (1), and an auxiliary structure (8) is fixedly provided outside the air intake assembly (6); A preheating tube (202) is fixedly provided on one side of the bottom of the smoke exhaust furnace (2), and a smoke exhaust tube (203) is fixedly provided inside one side of the preheating tube (202); the smoke exhaust tube (203) is connected to the smoke processor through a pipeline, and a smoke inlet pipe (201) is fixedly provided on the top of the smoke exhaust furnace (2); the air intake assembly (6) includes: an air inlet pipe (601), an air collecting cover (602) and a fan (603); the air inlet pipe (601) is fixedly provided between the smoke exhaust furnace (2) and the inside of the preheating tube (202). The furnace body (1) is provided with a support frame (104) fixedly disposed inside the bottom side of the furnace body (1), and one end of the air inlet pipe (601) is fixedly disposed inside the furnace body (1); the air collecting cover (602) is fixedly disposed at the other end of the air inlet pipe (601); the fan (603) is fixedly disposed outside the other end of the air collecting cover (602); a support frame (104) is fixedly disposed inside the bottom side of the furnace body (1), and the support frame (104) is located above the end of the air inlet pipe (601); a wind cap (105) is fixedly disposed inside the support frame (104), and the wind cap (105) is arranged in a rectangular array.

2. The circulating fluidized bed boiler solid waste direct combustion coupled power generation system according to claim 1, characterized in that: A feed pipe A (101) and a feed pipe B (102) are fixedly provided inside one side of the furnace body (1), and the feed pipe A (101) is used to feed coal powder and solid waste, and the feed pipe B (102) is used to feed limestone; the bottom ends of the feed pipe A (101) and the feed pipe B (102) are both located above the support frame (104).

3. The circulating fluidized bed boiler solid waste direct combustion coupled power generation system according to claim 1, characterized in that: A smoke hood (106) is fixedly provided inside the top side of the furnace body (1), and the smoke hood (106) is configured as a conical structure; igniters (103) are fixedly provided on both sides of the bottom of the furnace body (1), and the igniters (103) are arranged in a straight line.

4. The circulating fluidized bed boiler solid waste direct combustion coupled power generation system according to claim 3, characterized in that: The slag return structure (3) comprises: a mounting frame (301), a cyclone separator (302), a connecting pipe (303) and a slag return barrel (304); the mounting frame (301) is fixedly arranged between the furnace body (1) and the smoke exhaust furnace (2); the cyclone separator (302) is fixedly arranged inside the mounting frame (301), and the smoke inlet of the cyclone separator (302) is fixedly connected to the smoke outlet hood (106); the connecting pipe (303) is fixedly arranged between the smoke outlet of the cyclone separator (302) and the smoke inlet pipe (201); the slag return barrel (304) is fixedly arranged at the bottom of the slag outlet of the cyclone separator (302), and the bottom end of the slag return barrel (304) is fixedly arranged inside the furnace body (1), and the bottom end of the slag return barrel (304) is located above the support frame (104).

5. The circulating fluidized bed boiler solid waste direct combustion coupled power generation system according to claim 1, characterized in that: The steam generating assembly (4) comprises: a steam drum (401), a water outlet pipe (402), a downpipe (403), a heating vertical pipe (404) and a connecting pipe (405); the steam drum (401) is fixedly arranged on the top of the furnace body (1); the water outlet pipe (402) is fixedly arranged inside one side of the steam drum (401), and the main body of the water outlet pipe (402) is arranged in a T-shaped structure; the downpipe (403) is fixedly arranged at the bottom of both sides of the water outlet pipe (402); the heating vertical pipe (404) is fixedly arranged inside both sides of the furnace body (1), and the top end of the heating vertical pipe (404) is fixedly arranged inside the steam drum (401), and the heating vertical pipe (404) is arranged in a straight line; the connecting pipe (405) is fixedly arranged at the bottom end of the heating vertical pipe (404), and the connecting pipe (405) is fixedly connected to the bottom end of the downpipe (403).

6. The circulating fluidized bed boiler solid waste direct combustion coupled power generation system according to claim 5, characterized in that: The steam generating assembly (4) further comprises: an air outlet pipe (406) and a water inlet pipe (407); the air outlet pipe (406) is fixedly arranged inside the top side of the steam drum (401); and the water inlet pipe (407) is fixedly arranged inside one side of the steam drum (401).

7. The circulating fluidized bed boiler solid waste direct combustion coupled power generation system according to claim 6, characterized in that: The water preheating assembly (5) comprises: a water supply pipe (501), a transverse pipe A (502), a connecting transverse pipe (503), a transverse pipe B (504) and a preheating pipe (505); the water supply pipe (501) is fixedly arranged inside one side of the smoke exhaust furnace (2); the transverse pipe A (502) is fixedly arranged outside the end of the water supply pipe (501); one end of the connecting transverse pipe (503) is fixedly arranged inside one side of the smoke exhaust furnace (2), and the other end of the connecting transverse pipe (503) is fixedly connected to the water inlet pipe (407); the transverse pipe B (504) is fixedly arranged outside the end of the connecting transverse pipe (503), and the transverse pipe B (504) and the transverse pipe A (502) are both located inside the smoke exhaust furnace (2); and the preheating pipe (505) is fixedly arranged between the transverse pipe A (502) and the transverse pipe B (504).

8. The circulating fluidized bed boiler solid waste direct combustion coupled power generation system according to claim 7, characterized in that: The steam reheating structure (7) comprises: a gas supply pipe (701), a fixed pipe A (702), an exhaust pipe (703), a fixed pipe B (704) and a reheating pipe (705); the gas supply pipe (701) is fixedly arranged at the end of the exhaust pipe (406), and the bottom end of the gas supply pipe (701) is fixedly arranged inside the furnace body (1); the fixed pipe A (702) is fixedly arranged at the bottom end of the gas supply pipe (701); the exhaust pipe (703) is fixedly arranged inside one side of the furnace body (1), and the exhaust pipe (703) is connected to the steam turbine through a pipeline; the fixed pipe B (704) is fixedly arranged outside the end of the exhaust pipe (703); the reheating pipe (705) is fixedly arranged between the fixed pipe A (702) and the fixed pipe B (704), and the reheating pipe (705), the fixed pipe A (702) and the fixed pipe B (704) are all located inside the furnace body (1).

9. The circulating fluidized bed boiler solid waste direct combustion coupled power generation system according to claim 8, characterized in that: The preheating tube (505) and the reheating tube (705) are both arranged in a straight line, and both the preheating tube (505) and the reheating tube (705) are arranged in a serpentine structure; the preheating tube (505) is used for preheating water, and the reheating tube (705) is used for reheating steam.

10. The circulating fluidized bed boiler solid waste direct combustion coupled power generation system according to claim 1, characterized in that: The auxiliary structure (8) comprises: a filter frame (801), a rotating shaft (802) and a scraper (803); the filter frame (801) is fixedly arranged on the outside of the fan (603), and a filter screen is fixedly arranged inside the filter frame (801); the rotating shaft (802) is rotatably arranged inside the filter frame (801), and the rotating shaft (802) is fixedly connected to the blade rotating shaft inside the fan (603); the scraper (803) is fixedly arranged on the outside of the rotating shaft (802), and the outside of the scraper (803) is in contact with the surface of the filter screen inside the filter frame (801).

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