Solid waste treatment system applied to circulating fluidized boiler

Abstract

The utility model relates to a solid waste treatment system applied to a circulating fluidized bed boiler, and belongs to the field of circulating fluidized bed boilers, the solid waste treatment system comprises a solid waste bin, a pretreatment device, a combustion device and a flue gas treatment device, the pretreatment device is arranged on the solid waste bin and used for smashing industrial waste put into the solid waste bin, the combustion device is arranged on the solid waste bin in a communicating mode and used for combusting the smashed industrial waste, and the flue gas treatment device is arranged on the combustion device in a communicating mode and used for purifying flue gas generated in the combustion device. The industrial waste treatment device has the advantages that different industrial wastes with small particle sizes can be uniformly mixed, and then the different industrial wastes with more stable small particle sizes are mixed and enter the combustion device, so that more sufficient combustion is guaranteed, and the problems of low combustion efficiency and high pollutant emission during treatment of different types of industrial solid wastes are solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of circulating fluidized bed boilers, in particular to a solid waste treatment system applied to a circulating fluidized bed boiler. BACKGROUND

[0002] With the acceleration of industrialization, a large amount of industrial solid waste has brought great pressure to the environment. Although traditional garbage incineration technology and coal-fired power generation can solve the problem of energy supply to a certain extent, they generally have the problems of low energy efficiency and serious environmental pollution. Therefore, as a kind of efficient combustion equipment, the circulating fluidized bed boiler shows obvious advantages in the treatment of biomass energy, municipal solid waste and industrial waste.

[0003] At present, the existing circulating fluidized bed boiler is designed for single fuel, and it is difficult to adapt to the input of complex mixed fuel when facing mixed solid waste with diverse components and different physical properties. Especially when dealing with different types of industrial solid waste, it is easy to have problems such as low combustion efficiency and high pollutant emission. CONTENT OF THE INVENTION

[0004] In order to improve the problems of low combustion efficiency and high pollutant emission when dealing with different types of industrial solid waste, the present application provides a solid waste treatment system applied to a circulating fluidized bed boiler.

[0005] The solid waste treatment system applied to a circulating fluidized bed boiler provided by the present application adopts the following technical scheme:

[0006] A solid waste treatment system applied to a circulating fluidized bed boiler, comprising a solid waste bin, a pretreatment device, a combustion device and a flue gas treatment device, the solid waste bin is used to store a plurality of different types of industrial waste, the pretreatment device is arranged on the solid waste bin and is used to crush the industrial waste put into the solid waste bin, the combustion device is communicatively arranged on the solid waste bin and is used to burn the crushed industrial waste, and the flue gas treatment device is communicatively arranged on the combustion device and is used to purify the flue gas generated in the combustion device.

[0007] By adopting the above technical scheme, after the industrial waste is put into the solid waste bin, the pretreatment device crushes the industrial waste, the crushed industrial waste enters the combustion device for burning, and the flue gas generated by burning is purified by the flue gas treatment device before being discharged. By crushing the industrial waste, different industrial waste can form small particle size suitable for burning, and different industrial waste with small particle size can also be more uniformly mixed, and then different industrial waste with small particle size is mixed into the combustion device, which ensures more sufficient combustion and improves the problems of low combustion efficiency and high pollutant emission when dealing with different types of industrial solid waste.

[0008] Optionally, the pre-processing device comprises a mixing pulverizer and a drying machine, the mixing pulverizer is arranged in the solid waste bin and used for pulverizing and mixing the industrial waste, and the drying machine is arranged in the solid waste bin and used for heating the industrial waste.

[0009] By using the above technical scheme, the mixing pulverizer pulverizes different industrial wastes and mixes the small-sized different industrial materials after pulverization, and then the drying machine dries the small-sized industrial wastes to reduce the moisture in the industrial wastes and improve the subsequent combustion efficiency.

[0010] Optionally, the combustion device comprises a combustion furnace, a fuel assembly and a water supply assembly, the combustion furnace is communicatively arranged on the solid waste bin, the fuel assembly is communicatively arranged on the combustion furnace and used for supplying fuel to the combustion furnace, and the water supply assembly is communicatively arranged on the combustion furnace and used for spraying water into the combustion furnace.

[0011] By using the above technical scheme, the pulverized industrial materials enter the combustion furnace, the fuel assembly supplies fuel into the combustion furnace to ensure the combustion of the industrial materials in the combustion furnace, and the water supply assembly sprays water into the combustion furnace to reduce the generation of harmful gases in the combustion process.

[0012] Optionally, the water supply assembly comprises a plurality of spray heads, a water pump, a cation exchanger, a carbon remover, an anion exchanger, a mixed ion exchanger and a desalted water tank, the plurality of spray heads are communicatively arranged on the combustion furnace, the water pump is communicatively arranged on the plurality of spray heads, and the cation exchanger, the carbon remover, the anion exchanger, the mixed ion exchanger and the desalted water tank are all communicatively arranged between the spray heads and the water pump.

[0013] By using the above technical scheme, the water pump pumps water, and the water sequentially passes through the cation exchanger to remove cations, the carbon remover to remove carbon dioxide, the anion exchanger to remove anions, the mixed ion exchanger to remove cations and anions, and the desalted water tank to remove salt in the water, and then the purified water flows to the spray heads to be sprayed into the combustion furnace, so as to reduce the scale formed by cations, anions, carbon dioxide and salt in the water in the combustion furnace, and the staff can also control the water spraying amount from the spray heads by controlling the water pumping rate of the water pump, thereby controlling the temperature in the combustion furnace.

[0014] Optionally, a steam turbine generator set is communicatively arranged on the combustion furnace.

[0015] By using the above technical scheme, the water sprayed by the spray heads generates high-temperature and high-pressure steam after entering the combustion furnace, the high-temperature and high-pressure steam enters the steam turbine generator set to make the steam turbine generator set work and generate electricity, thereby realizing the generation of electric energy.

[0016] Optionally, an automatic regulating valve is arranged at the communication position of the solid waste bin and the combustion furnace.

[0017] By adopting the above technical solution, the automatic regulating valve controls the flow of the crushed industrial waste in the solid waste bin into the combustion furnace according to the combustion conditions in the combustion furnace, ensuring that the industrial waste in the combustion furnace is fully burned.

[0018] Optionally, an air guide fan is provided on the solid waste bin, and the air guide fan is used to guide the gas in the solid waste bin into the combustion furnace.

[0019] By adopting the above technical solution, the air guide fan sends the gas generated by industrial waste in the solid waste bin into the combustion furnace to assist combustion, thereby improving the combustion effect in the combustion furnace and reducing the discharge of waste gas in the solid waste bin.

[0020] Optionally, the flue gas treatment device includes an electrostatic precipitator, activated carbon adsorption, a bag dust collector, a limestone-gypsum desulfurization device and a wet electrostatic precipitator, and the electrostatic precipitator, activated carbon adsorption, a bag dust collector, a limestone-gypsum desulfurization device and a wet electrostatic precipitator are connected in sequence and arranged between the flue gas outlet and the flue gas discharge port of the combustion furnace.

[0021] By adopting the above technical solution, the gas generated by combustion in the combustion furnace is discharged from the flue gas outlet, and is purified in sequence by the electrostatic precipitator, activated carbon adsorption, bag filter, limestone-gypsum desulfurization equipment and wet electrostatic precipitator before being discharged from the exhaust port, thereby reducing pollutants in the exhaust gas, meeting emission standards and improving air quality.

[0022] In summary, this application includes at least one of the following beneficial technical effects:

[0023] 1. By crushing industrial waste, different industrial waste can be formed into small particles suitable for combustion, and different industrial waste with small particles can be mixed more evenly. Then, different industrial waste with more stable small particles are mixed into the combustion device to ensure more complete combustion and improve the problems of low combustion efficiency and high pollutant emissions when treating different types of industrial solid waste;

[0024] 2. Reduce the scale formed in the combustion furnace by cations, anions, carbon dioxide and salt in the water. By controlling the pumping rate of the water pump, the staff can also control the amount of water sprayed from the sprinkler head, thereby controlling the temperature in the combustion furnace;

[0025] 3. The air guide fan sends the gas generated by industrial waste in the solid waste bin into the combustion furnace to assist combustion, thereby improving the combustion effect in the combustion furnace and reducing the discharge of waste gas in the solid waste bin. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a flow chart of a solid waste treatment system applied to a circulating fluidized boiler according to an embodiment of the present application.

[0027] 1, solid waste bin; 2, pretreatment device; 3, combustion device; 31, combustion furnace; 32, fuel assembly; 33, water supply assembly; 331, spray head; 332, water pump; 333, cation exchanger; 334, carbon remover; 335, anion exchanger; 336, mixed ion exchanger; 337, desalted water tank; 4, flue gas treatment device; 41, electric precipitator; 42, activated carbon adsorption; 43, bag-type dust collector; 44, limestone-gypsum desulfurization equipment; 45, wet electric precipitator; 5, steam turbine generator unit; 6, automatic regulating valve; 7, air guide fan; 8, slag bin. DETAILED DESCRIPTION

[0028] The following will be described in detail with reference to the accompanying drawings. Figure 1 The application is further described in detail.

[0029] The embodiment of the application discloses a solid waste treatment system applied to a circulating fluidized boiler.

[0030] Referring to Figure 1 The solid waste treatment system applied to the circulating fluidized boiler comprises a solid waste bin 1, a pretreatment device 2, a combustion device 3, a flue gas treatment device 4 and a steam turbine generator unit 5. The solid waste bin 1 is used for storing various industrial wastes such as waste spinning, waste timber, sludge and waste leather. The pretreatment device 2 is installed on the solid waste bin 1 and is used for crushing the industrial wastes input into the solid waste bin 1. The pretreatment device 2 comprises a mixed crusher and a drying machine. In the embodiment, the mixed crusher comprises a crusher and a mixer. The crusher crushes various industrial wastes, and then the mixer mixes the small-sized various industrial wastes. The drying machine is installed in the solid waste bin 1 and is used for heating and drying the industrial wastes in the solid waste bin 1.

[0031] The solid waste transport vehicle transports various industrial wastes into the solid waste bin 1. The drying machine heats and dries the industrial wastes in the solid waste bin 1, so as to reduce the moisture in the industrial wastes and improve the subsequent combustion efficiency. Then the mixed crusher crushes the various industrial wastes in the solid waste bin 1 into small sizes and mixes the small-sized various industrial wastes.

[0032] Referring to Figure 1The combustion device 3 is communicated and installed on the solid waste bin 1, and the combustion device 3 is used for burning the crushed industrial waste. The combustion device 3 comprises a combustion furnace 31, a fuel assembly 32 and a water supply assembly 33. The combustion furnace 31 is communicated and installed at the bottom of the solid waste bin 1. In the embodiment, the slag bin 8 is communicated and installed on the combustion furnace 31, so as to facilitate the discharge and storage of the slag in the combustion furnace 31. The automatic regulating valve 6 is installed on the discharge port of the solid waste bin 1 and the combustion furnace 31. When the small-size industrial waste in the solid waste bin 1 enters the combustion furnace 31, the automatic regulating valve 6 can control the flow of the small-size industrial waste entering the combustion furnace 31 according to the combustion condition of the industrial waste in the combustion furnace 31, so as to ensure the sufficient combustion of the industrial waste in the combustion furnace 31.

[0033] With reference to Figure 1 The fuel assembly 32 is communicated and installed on the combustion furnace 31, and the fuel assembly 32 is used for supplying fuel to the combustion furnace 31. In the embodiment, the combustion assembly comprises a buried oil tank, and the oil tank stores No. 0 light diesel oil. The No. 0 light diesel oil is supplied to the combustion furnace 31 through the buried oil tank, so as to ensure the fuel supply in the combustion chamber.

[0034] With reference to Figure 1 The water supply assembly 33 is communicated and installed on the combustion furnace 31, and the water supply assembly 33 is used for spraying water into the combustion furnace 31. The water supply assembly 33 comprises a plurality of spray heads 331, a water pump 332, a cation exchanger 333, a carbon remover 334, an anion exchanger 335, a mixed ion exchanger 336 and a desalted water tank 337. The plurality of spray heads 331 are communicated and installed on the combustion furnace 31. The water inlet of the water pump 332 is communicated with an external water source. The water outlet of the water pump 332 is communicated with the plurality of spray heads 331 through a pipeline. The cation exchanger 333, the carbon remover 334, the anion exchanger 335, the mixed ion exchanger 336 and the desalted water tank 337 are sequentially communicated and installed on the pipeline communicated between the water pump 332 and the spray heads 331 from the water pump 332 to the spray heads 331.

[0035] The small particle size industrial waste after crushing enters the combustion furnace 31 from the solid waste bin 1, the fuel assembly 32 supplies fuel to the combustion furnace 31, so that the industrial waste burns in the combustion furnace 31, and the water pump 332 pumps water into the combustion furnace 31, and then the cation ion exchanger 333 removes cations, the carbon remover 334 removes carbon dioxide, the anion exchanger 335 removes anions, the mixed ion exchanger 336 removes cations and anions, and the desalted water tank 337 removes salt in water, and then the water is sprayed from the spray head 331, which reduces the generation of harmful gases in the combustion process. The staff can also control the amount of water sprayed from the spray head 331 by controlling the pumping rate of the water pump 332, thereby controlling the temperature in the combustion furnace 31. By purifying cations, anions, carbon dioxide and salt in the water, the scale formed by the water entering the combustion furnace 31 can also be reduced.

[0036] Referring to Figure 1 , the steam turbine generator set 5 is connected and installed on the combustion chamber, and the water entering the combustion chamber generates high-temperature and high-pressure steam. The high-temperature and high-pressure steam expands and does work in the steam turbine generator set 5, so that the blades of the steam turbine generator set 5 rotate to drive the generator to do work and generate electricity, thereby supplying electricity to the outside, improving the utilization rate of heat energy, and improving the economic benefits of industrial waste treatment.

[0037] Referring to Figure 1 , the solid waste bin 1 is provided with an air guide fan 7, the air inlet of the air guide fan 7 is communicated with the solid waste bin 1, and the air outlet of the air guide fan 7 is communicated with the combustion furnace 31. The air guide fan 7 sends the gas generated by the industrial waste in the solid waste bin 1 into the combustion furnace 31 to assist the combustion of the industrial waste in the combustion furnace 31, thereby improving the combustion effect of the industrial waste in the combustion furnace 31 and reducing the exhaust of the exhaust gas in the solid waste bin 1.

[0038] Referring to Figure 1 , the flue gas treatment device 4 is connected and installed on the combustion furnace 31, and the flue gas treatment device 4 is used for purifying the flue gas generated in the combustion furnace 31. The flue gas treatment device 4 includes an electric precipitator 41, an activated carbon adsorption 42, a bag-type dust collector 43, a limestone-gypsum desulfurization device 44 and a wet-type electric precipitator 45. The electric precipitator 41, the activated carbon adsorption 42, the bag-type dust collector 43, the limestone-gypsum desulfurization device 44 and the wet-type electric precipitator 45 are sequentially connected and installed between the flue gas outlet of the combustion furnace 31 and the flue gas discharge port.

[0039] The flue gas generated by the combustion of the industrial waste in the combustion furnace 31 is discharged from the flue gas outlet of the combustion furnace 31, and the discharged flue gas is dedusted by the electric dust collector 41, the harmful substances in the flue gas are removed by the activated carbon adsorption 42, the flue gas is dedusted again by the bag dust collector 43, the sulfur in the flue gas is removed by the limestone-gypsum desulfurization device 44, the flue gas is dedusted again by the wet electric dust collector 45, and then the treated flue gas is discharged from the discharge port, thereby reducing the pollutants in the discharged gas, meeting the emission standard, and improving the air quality.

[0040] The implementation principle of the solid waste treatment system applied to the circulating fluidized boiler is as follows: the various industrial wastes are put into the solid waste bin 1, and then the various industrial wastes in the solid waste bin 1 are crushed into small particle size particles by the mixing pulverizer, and the small particle size particles of different types of industrial wastes are mixed, and the mixed small particle size industrial wastes of different types are burned in the combustion chamber. In the combustion process, the air blower 7 guides the gas in the solid waste bin 1 into the combustion furnace 31 to assist combustion, the water pump 332 pours the filtered water into the combustion chamber to reduce the generation of harmful gas, the generated high-temperature and high-pressure steam makes the steam turbine generator set 5 generate power, and then the flue gas treatment device 4 purifies the gas generated in the combustion furnace 31, and discharges it after meeting the emission standard. By crushing different industrial wastes into small particle sizes suitable for combustion, uniformly mixing small particle sizes of different industrial wastes, and then entering the combustion chamber with stable small particle sizes of mixed components of different industrial wastes, the components of different industrial wastes in the combustion chamber are kept stable, thereby ensuring the full combustion of industrial wastes in the combustion chamber, improving the compatibility of different industrial wastes, and improving the combustion efficiency and heat energy utilization rate, and improving the problems of low combustion efficiency and high pollutant emission when treating different types of industrial solid wastes.

[0041] The above are preferred embodiments of the present application, and do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A solid waste treatment system for a circulating fluidized bed boiler, characterized by: The invention comprises a solid waste bin (1), a pretreatment device (2), a combustion device (3) and a flue gas treatment device (4), wherein the solid waste bin (1) is used to store various types of industrial waste, the pretreatment device (2) is arranged on the solid waste bin (1) and is used to crush the industrial waste put into the solid waste bin (1), the combustion device (3) is connected to the solid waste bin (1) and is used to burn the crushed industrial waste, and the flue gas treatment device (4) is connected to the combustion device (3) and is used to purify the flue gas generated in the combustion device (3).

2. The solid waste treatment system for a circulating fluidized bed boiler according to claim 1, characterized in that: The pretreatment device (2) comprises a mixing crusher and a drying machine. The mixing crusher is arranged in the solid waste bin (1) and is used to crush and mix the industrial waste. The drying machine is arranged in the solid waste bin (1) and is used to heat the industrial waste.

3. The solid waste treatment system for a circulating fluidized bed boiler according to claim 1, characterized in that: The combustion device (3) comprises a combustion furnace (31), a fuel assembly (32) and a water supply assembly (33); the combustion furnace (31) is connected to the solid waste bin (1); the fuel assembly (32) is connected to the combustion furnace (31) and is used to supply fuel to the combustion furnace (31); and the water supply assembly (33) is connected to the combustion furnace (31) and is used to spray water into the combustion furnace (31).

4. The solid waste treatment system for a circulating fluidized bed boiler according to claim 3, characterized in that: The water supply assembly (33) includes a spray head (331), a water pump (332), a cation exchanger (333), a decarbonizer (334), an anion exchanger (335), a mixed ion exchanger (336) and a desalted water tank (337). A plurality of the spray heads (331) are connected and arranged on the combustion furnace (31). The water pump (332) is connected and arranged on the plurality of spray heads (331). The cation exchanger (333), the decarbonizer (334), the anion exchanger (335), the mixed ion exchanger (336) and the desalted water tank (337) are all connected and arranged between the spray head (331) and the water pump (332).

5. The solid waste treatment system for a circulating fluidized bed boiler according to claim 3, characterized in that: The combustion furnace (31) is connected to a steam turbine generator set (5).

6. The solid waste treatment system for a circulating fluidized bed boiler according to claim 3, characterized in that: An automatic regulating valve (6) is provided at the connection point between the solid waste bin (1) and the combustion furnace (31).

7. The solid waste treatment system for a circulating fluidized bed boiler according to claim 3, characterized in that: The solid waste bin (1) is provided with an air guide fan (7), and the air guide fan (7) is used to guide the gas in the solid waste bin (1) into the combustion furnace (31).

8. The solid waste treatment system for a circulating fluidized bed boiler according to claim 3, characterized in that: The flue gas treatment device (4) includes an electrostatic precipitator (41), an activated carbon adsorption device (42), a bag filter (43), a limestone-gypsum desulfurization device (44) and a wet electrostatic precipitator (45), and the electrostatic precipitator (41), the activated carbon adsorption device (42), the bag filter (43), the limestone-gypsum desulfurization device (44) and the wet electrostatic precipitator (45) are sequentially connected and arranged between the flue gas outlet and the flue gas discharge port of the combustion furnace (31).

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