CN117704348A - Coal-fired power plant coupling solid waste power generation system - Google Patents
Coal-fired power plant coupling solid waste power generation system Download PDFInfo
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- CN117704348A CN117704348A CN202410036324.4A CN202410036324A CN117704348A CN 117704348 A CN117704348 A CN 117704348A CN 202410036324 A CN202410036324 A CN 202410036324A CN 117704348 A CN117704348 A CN 117704348A
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- 239000002910 solid waste Substances 0.000 title claims abstract description 112
- 238000010248 power generation Methods 0.000 title claims abstract description 42
- 230000008878 coupling Effects 0.000 title claims abstract description 36
- 238000010168 coupling process Methods 0.000 title claims abstract description 36
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 36
- 239000000428 dust Substances 0.000 claims abstract description 82
- 239000002994 raw material Substances 0.000 claims abstract description 59
- 239000002912 waste gas Substances 0.000 claims abstract description 30
- 239000007789 gas Substances 0.000 claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 16
- 238000001035 drying Methods 0.000 claims abstract description 11
- 238000009270 solid waste treatment Methods 0.000 claims abstract description 6
- 239000000843 powder Substances 0.000 claims description 27
- 239000002028 Biomass Substances 0.000 claims description 20
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 16
- 239000003245 coal Substances 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 8
- 239000004744 fabric Substances 0.000 claims description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 6
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 238000003801 milling Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 239000012530 fluid Substances 0.000 claims description 3
- 229910052742 iron Inorganic materials 0.000 claims description 3
- 239000002699 waste material Substances 0.000 claims description 2
- 238000002485 combustion reaction Methods 0.000 description 12
- 239000000446 fuel Substances 0.000 description 12
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 7
- 229910052799 carbon Inorganic materials 0.000 description 7
- 238000000034 method Methods 0.000 description 5
- 239000010881 fly ash Substances 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 238000006477 desulfuration reaction Methods 0.000 description 2
- 230000023556 desulfurization Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 239000012535 impurity Substances 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 238000000197 pyrolysis Methods 0.000 description 2
- 240000000111 Saccharum officinarum Species 0.000 description 1
- 235000007201 Saccharum officinarum Nutrition 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 239000000356 contaminant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000012809 cooling fluid Substances 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 210000003608 fece Anatomy 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 244000144972 livestock Species 0.000 description 1
- 239000010871 livestock manure Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- 239000003923 scrap metal Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/12—Heat utilisation in combustion or incineration of waste
Abstract
The invention discloses a coal-fired power plant coupling solid waste power generation system, which comprises a solid waste treatment system and a coal-fired unit, wherein the coal-fired unit comprises a boiler with a secondary air chamber; the preamble processing mechanism of the solid waste processing system comprises a drier, wherein the drier is provided with a raw material inlet for solid waste raw materials to enter, a secondary air inlet for supplying hot secondary air to enter, an output port for outputting dried materials and an exhaust gas outlet for outputting exhaust gas generated by drying; the waste gas outlet of the desiccator is communicated with the secondary air chamber, and the output port is connected with the input end of the first conveyor; the output end of the first conveyor of the solid waste treatment system is connected with the inlet of the pulverizer, the outlet of the pulverizer is connected with the inlet of the dust removing mechanism, the waste gas outlet of the dust removing mechanism is connected with the waste gas conveying mechanism, the material outlet of the dust removing mechanism is connected with the input end of the second conveyor, the output end of the second conveyor is connected with the buffer bin, the outlet of the buffer bin is connected with the input end of the feeding mechanism, and the output end of the feeding mechanism is connected with the boiler.
Description
Technical Field
The invention relates to the technical field of coal-fired equipment, in particular to a coal-fired power plant coupling solid waste power generation system.
Background
Aiming at the coupling mode of biomass and coal-fired power plant units, the biomass-biomass mixed combustion technology is mainly adopted.
At present, biomass and coal coupled combustion methods generally convert biomass into biomass carbon, directly mix the biomass carbon into a coal mill, grind the biomass carbon by the coal mill and then enter a boiler for combustion. However, the biomass pyrolysis process is complex, the consumed energy is large, and the investment and the operation cost are high, so that the biomass pyrolysis process is not suitable for being coupled with a coal-fired power plant unit.
Therefore, how to reduce energy consumption, which is suitable for coupling with coal-fired power station units, is a problem to be solved urgently by those skilled in the art.
Disclosure of Invention
In view of the above, the invention provides a coal-fired power plant coupling solid waste power generation system, which is suitable for coupling with a coal-fired power plant unit and is used for reducing energy consumption.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a coal-fired power plant coupled solid waste power generation system, comprising:
the solid waste treatment system comprises a preamble treatment mechanism, a first conveyor, a pulverizer, a dust removal mechanism, a waste gas conveying mechanism, a second conveyor, a buffer bin and a feeding mechanism;
the system comprises a coal-fired unit, a control unit and a control unit, wherein the coal-fired unit comprises a boiler, and the boiler is provided with a secondary air chamber;
wherein,
the preamble processing mechanism comprises a drier, wherein the drier is provided with a raw material inlet for the solid waste raw material to enter, a secondary air inlet for supplying secondary air to enter, an output port for outputting dried materials and an exhaust gas outlet for outputting exhaust gas generated by drying;
the waste gas outlet of the desiccator is communicated with the secondary air chamber, and the output port is connected with the input end of the first conveyor;
the output of first conveyer with the entry linkage of milling machine, the export of milling machine with dust removal mechanism's entry linkage, dust removal mechanism's waste gas export with waste gas conveying mechanism connects, dust removal mechanism's material export with the input of second conveyer is connected, the output of second conveyer with the surge bin is connected, the export of surge bin with feed mechanism's input is connected, feed mechanism's output with the boiler is connected.
Optionally, in the coal-fired power plant coupling solid waste power generation system, the boiler is provided with a primary air coal powder pipeline, and the output end of the feeding mechanism is connected with the primary air coal powder pipeline;
or the coal-fired power plant coupling solid waste power generation system is provided with a biomass burner, and the output end of the feeding mechanism is connected with the inlet of the biomass burner.
Optionally, in the coal-fired power plant coupling solid waste power generation system, the preamble processing mechanism further comprises a second dust remover and a second induced draft fan;
the inlet of the second dust remover is connected with the exhaust gas outlet of the desiccator, the outlet of the second dust remover is connected with the inlet of the second induced draft fan, and the outlet of the second induced draft fan is connected with the secondary air chamber.
Optionally, in the coal-fired power plant coupling solid waste power generation system, the preamble processing mechanism further comprises an auxiliary conveying mechanism, and the auxiliary conveying mechanism comprises a scraper conveyor and a primary crusher;
the input end of the scraper conveyor is used for inputting the solid waste raw materials, the output end of the scraper conveyor is connected with the inlet of the primary crusher, and the output end of the primary crusher is connected with the input end of the first conveyor.
Optionally, in the coal-fired power plant coupling solid waste power generation system, the coal-fired power plant coupling solid waste power generation system further comprises a detection device for detecting the water content of the solid waste raw material;
when the water content of the solid waste raw material is not higher than a preset value, conveying the solid waste raw material to the input end of the scraper conveyor;
and when the water content of the solid waste raw material is higher than a preset value, conveying the solid waste raw material to a raw material inlet of the drier.
Optionally, in the coal-fired power plant coupling solid waste power generation system, the first conveyor is an iron removal belt conveyor for removing waste metal in the solid waste raw material.
Optionally, in the coal-fired power plant coupling solid waste power generation system, the dust removing mechanism comprises a cyclone dust remover and a pulse cloth bag dust remover;
the waste gas outlet of the cyclone dust collector is connected with the inlet of the pulse cloth bag dust collector, and the waste gas outlet of the pulse cloth bag dust collector is connected with the waste gas conveying mechanism;
the inlet of the cyclone dust collector is connected with the outlet of the pulverizer, and the cyclone dust collector and the material outlet of the pulse bag dust collector are connected with the input end of the second conveyor.
Optionally, in the coal-fired power plant coupling solid waste power generation system, the feeding mechanism includes:
one end of the feeding pipeline is connected with the outlet of the buffer bin through a screw feeder, and the feeding pipeline is provided with an air lock;
the other end of the feeding pipeline is communicated with the communication area of the powder feeding pipeline, and one end of the powder feeding pipeline is connected with the boiler; the buffer bin is arranged adjacent to the boiler room;
the air outlet of the conveying fan is connected with the other end of the powder conveying pipeline;
and the air cooler is used for cooling fluid in the pipeline section of the powder conveying pipeline between the communication area and the conveying fan.
Optionally, in the coal-fired power plant coupling solid waste power generation system, the communication area is provided with a wind-powder mixer.
Optionally, in the coal-fired power plant coupling solid waste power generation system, the waste gas conveying mechanism comprises a first induced draft fan, and an inlet of the first induced draft fan is connected with a waste gas outlet of the dust removing mechanism;
the outlet of the first induced draft fan is connected with the air inlet of the forced draught blower or the outside atmosphere.
According to the technical scheme, the coal-fired power plant coupling solid waste power generation system provided by the invention is characterized in that in the actual use process, solid waste raw materials are conveyed to a drying machine for drying, hot secondary air is introduced as a heat source, the waste gas outlet of the drying machine outputs high-humidity dust-containing hot air (containing certain dust at the same time) and enters a secondary air chamber, and then the dust carried by the hot air is fully combusted in a boiler. The water content of the solid waste raw material dried by the drier is greatly reduced, the heat value of the solid waste raw material is also improved, and the high-efficiency treatment in a boiler can be realized. The dried solid waste raw material is sent to a pulverizer through a first conveyor, and the particle size of the solid waste raw material after being pulverized meets the combustion requirement of a boiler. The solid waste raw materials after the powder grinding form solid waste fuel, the fly ash is removed by the solid waste fuel through entering a dust removing mechanism, the solid waste fuel after the fly ash removal treatment is conveyed to a buffer bin through a second conveyor and stored in the buffer bin, and then the solid waste fuel is conveyed to a boiler through a feeding mechanism for combustion. According to the coal-fired power plant coupling solid waste power generation system provided by the embodiment of the invention, the drying heat source comes from the hot secondary air, so that the consumption of steam and other heat sources is avoided, and the running cost of the system is effectively reduced; the device for preparing carbon and the coal mill for converting biomass into biomass carbon are not required, and the dried exhaust gas is fed into the boiler, so that the exhaust gas is not discharged outwards, the pollution to the atmosphere is reduced, and the device can be well coupled with a coal-fired power plant unit.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a first structure of a coal-fired power plant coupled solid waste power generation system provided by an embodiment of the invention;
fig. 2 is a schematic diagram of a second structure of the coal-fired power plant coupling solid waste power generation system according to the embodiment of the invention.
Detailed Description
The invention discloses a coal-fired power plant coupling solid waste power generation system which is used for reducing energy consumption and is suitable for coupling with a coal-fired power plant unit.
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1 and fig. 2, the embodiment of the invention provides a coal-fired power plant coupling solid waste power generation system, which comprises a solid waste treatment system and a coal-fired unit. The solid waste treatment system is used for treating the solid waste raw material 1 and comprises a preamble treatment mechanism, a first conveyor 4, a pulverizer 5, a dust removal mechanism, an exhaust gas conveying mechanism, a second conveyor 10, a buffer bin 11 and a feeding mechanism; the coal-fired unit includes a boiler 17, the boiler 17 having a secondary plenum 18.
The pretreatment mechanism comprises a drier 22, wherein the drier 22 is provided with a raw material inlet for solid waste raw materials 1 to enter, a secondary air inlet for heat supply secondary air 21 to enter, an output port for outputting dried materials and an exhaust gas outlet for outputting exhaust gas generated by drying; the waste gas outlet of the drier 22 is communicated with the secondary air chamber 18, and the output port is connected with the input end of the first conveyor 4. Wherein the temperature of the hot secondary air 21 is about 310 ℃, and the temperature of the hot secondary air 21 passing through the drier 22 is 80-100 ℃.
The output end of the first conveyor 4 is connected to the inlet of the pulverizer 5, the outlet of the pulverizer 5 is connected to the inlet of the dust removing mechanism, the exhaust gas outlet of the dust removing mechanism is connected to the exhaust gas conveying mechanism, the material outlet of the dust removing mechanism is connected to the input end of the second conveyor 10, the output end of the second conveyor 10 is connected to the surge bin 11, the outlet of the surge bin 11 is connected to the input end of the feeding mechanism, and the output end of the feeding mechanism is connected to the boiler 17.
In the coal-fired power plant coupling solid waste power generation system provided by the embodiment of the invention, in the actual use process, solid waste raw materials 1 are conveyed to a drier 22 for drying, hot secondary air 21 is introduced as a heat source, high-humidity dust-containing hot air (containing a certain amount of dust) is output from an exhaust gas outlet of the drier 22 and enters a secondary air chamber 18, and then the dust carried by the hot air is fully combusted in a boiler 17. The water content of the solid waste raw material 1 after being dried by the drier 22 is greatly reduced, the heat value is also improved, and the high-efficiency treatment in the boiler 17 can be realized. The dried solid waste raw material 1 is sent to a pulverizer 5 through a first conveyor 4, and the particle size of the solid waste raw material 1 after being pulverized meets the combustion requirement of a boiler 17. The solid waste raw material 1 after grinding forms solid waste fuel, the fly ash is removed by the solid waste fuel after entering a dust removing mechanism, the solid waste fuel after fly ash removal treatment is conveyed to a buffer bin 11 by a second conveyor 10 and stored in the buffer bin 11, and then is conveyed to a boiler 17 for combustion by a feeding mechanism. According to the coal-fired power plant coupling solid waste power generation system provided by the embodiment of the invention, a drying heat source is from the hot overgrate air 21, so that the consumption of steam and other heat sources is avoided, and the running cost of the system is effectively reduced; the carbon making device and the coal mill for converting biomass into biomass carbon are not required to be arranged, and the dried exhaust gas is sent to the boiler 17, so that the exhaust gas is not discharged to the outside, the pollution to the atmosphere is reduced, and the coupling with a coal-fired power plant unit can be good.
It can be understood that the solid waste fuel enters the boiler 17 for combustion, and then passes through the original denitration system, dust removal system and desulfurization system of the coal-fired power plant, SO that SO generated in the solid waste combustion process is further removed 2 、NO x And other contaminants.
The coal-fired unit can further comprise a boiler, a heating surface in the boiler, a denitration system, an air preheater, a dust removal system, a desulfurization system, a combustion system, an air supply system and a chimney.
Specifically, the boiler is provided with a primary air pulverized coal pipeline, and the output end of the feeding mechanism is connected with the primary air pulverized coal pipeline; the powder produced by the solid waste fuel 1 is conveyed to a primary air pulverized coal pipeline of the boiler 17 by a feeding mechanism and enters a furnace chamber of the boiler 17 for combustion.
The coal-fired power plant coupling solid waste power generation system can be provided with a biomass burner, and the output end of the feeding mechanism is connected with the inlet of the biomass burner. That is, the powder produced from the solid waste fuel 1 is fed by the feeding mechanism to the biomass burner for combustion.
Further, the preamble processing mechanism further comprises a second dust remover 20 and a second induced draft fan 19; the inlet of the second dust remover 20 is connected with the exhaust gas outlet of the drier 22, the outlet of the second dust remover 20 is connected with the inlet of the second induced draft fan 19, and the outlet of the second induced draft fan 19 is connected with the secondary air chamber 18.
That is, the waste gas (high-humidity and dust-containing hot air (containing a certain amount of dust) generated after the solid waste material 1 is dried by the drier 22 enters the second dust remover 20 to remove dust, and then is pressurized by the second induced draft fan 19 and sent into the secondary air chamber 18.
Further, the preamble processing mechanism also comprises an auxiliary conveying mechanism, wherein the auxiliary conveying mechanism comprises a scraper conveyor 2 and a primary crusher 3; the input end of the scraper conveyor 2 is used for inputting solid waste raw materials 1, the output end of the scraper conveyor 2 is connected with the inlet of the first-stage crusher 3, and the output end of the first-stage crusher 3 is connected with the input end of the first conveyor 4.
It will be appreciated that the moisture content of the solid waste feedstock 1 affects whether it can be directly fed into the boiler 17 for combustion.
As shown in fig. 1, in the first embodiment, when the water content of the solid waste raw material 1 is higher than a preset value, the solid waste raw material 1 is fed to the raw material inlet of the drier 22. Specifically, the water content of the solid waste raw material 1 may be higher than 20%. In addition, the solid waste raw material 1 has a relatively high water content, and the structure is loose, so that the shape of the solid waste raw material 1 is relatively small, such as Chinese medicine residues, livestock and poultry manure and the like.
When the coal-fired power plant is coupled with the solid waste power generation system to run, the solid waste raw material 1 is conveyed to the drier 22 through conveying equipment to be dried, hot secondary air 21 is introduced as a heat source, high-humidity dust-containing hot air (containing a certain amount of dust at the same time) at the outlet of the drier 22 enters the second dust remover 20 to be dedusted, and then is pressurized by a second induced draft fan 19 to be conveyed into the secondary air chamber 18, so that dust carried in the drying process is fully combusted in a boiler. The dried solid waste material 1 enters a first conveyor 4.
As shown in fig. 2, in the second embodiment, when the water content of the solid waste raw material 1 is not higher than a preset value, the solid waste raw material 1 is conveyed to the auxiliary conveying mechanism. Specifically, the moisture content of the solid waste raw material 1 may be not higher than 20%, and the solid waste raw material 1 is relatively intact in shape due to its relatively low moisture content, such as crop stalks, sugarcane leaves, and the like, due to its loose structure.
When the coal-fired power plant is coupled with the solid waste power generation system to operate, the solid waste raw material 1 is conveyed to the scraper conveyor 2 through conveying equipment, then is conveyed to the first-stage crusher 3, is subjected to preliminary crushing in the first-stage crusher, and then enters the first conveyor 4.
In order to improve the degree of automation, the coal-fired power plant coupling solid waste power generation system also comprises a detection device for detecting the water content of the solid waste raw material 1;
when the water content of the solid waste raw material 1 is not higher than a preset value, conveying the solid waste raw material 1 to the input end of the scraper conveyor 2; when the water content of the solid waste raw material 1 is higher than a preset value, the solid waste raw material 1 is conveyed to the raw material inlet of the drier 22.
Of course, it is also possible to manually determine the water content of the solid waste material 1 and select the material inlet for conveying the solid waste material 1 to the input end of the scraper conveyor 2 or the dryer 22.
For the protection of the devices in the system, the first conveyor 4 is an iron removal belt conveyor for removing scrap metal in the solid scrap raw material 1. That is, in the conveying process of the first conveyor 4, the solid waste raw material 1 can remove metal impurities in the solid waste raw material 1, so as to prevent the metal impurities from entering subsequent equipment (such as the pulverizer 5, the dust removing mechanism and the like), and effectively prolong the service life.
In the coal-fired power plant coupling solid waste power generation system provided by the embodiment of the invention, the dust removing mechanism comprises a cyclone dust remover 6 and a pulse bag dust remover 7; the waste gas outlet of the cyclone dust collector 6 is connected with the inlet of the pulse cloth bag dust collector 7, and the waste gas outlet of the pulse cloth bag dust collector 7 is connected with the waste gas conveying mechanism; the inlet of the cyclone dust collector 6 is connected with the outlet of the pulverizer 5, and the material outlets of the cyclone dust collector 6 and the pulse bag dust collector 7 are connected with the input end of the second conveyor 10. Through the arrangement, the cyclone dust collector 6 and the pulse bag dust collector 7 can be connected in series on the exhaust gas flow path, so that the dust discharge amount of the dust removing mechanism is effectively reduced, and the energy utilization rate is further improved.
In the embodiment, the dust content of the exhaust gas discharged by the pulse bag-type dust collector 7 is less than or equal to 10mg/Nm 3 。
In this embodiment, the feeding mechanism includes a feeding pipe, a powder feeding pipe, a conveying fan 14, and an air cooler 15. One end of a feeding pipeline is connected with the outlet of the buffer bin 11 through a screw feeder 12, and the feeding pipeline is provided with an air lock 13; the other end of the feeding pipeline is communicated with the communicating area of the powder feeding pipeline, and one end of the powder feeding pipeline is connected with the boiler 17; the air outlet of the conveying fan 14 is connected with the other end of the powder conveying pipeline; the air cooler 15 is used for cooling the fluid in the pipe section of the powder feed pipe between the communication area and the conveying fan 14.
Preferably, the dilute phase delivery form is formed between the delivery air of the delivery fan 14 and the solid waste fuel particles.
Of course, the air cooler 15 may not be provided when the temperature of the air discharged from the air outlet of the conveying fan 14 is lower than the preset temperature. For example, the air with proper pressure head provided by the conveying fan 14 is cooled to not higher than 50 ℃ by the air cooler 15, and when the air temperature at the outlet of the conveying fan 14 is not higher than 50 ℃, the air cooler 15 is not needed.
The conveying fan can be a Roots fan or a blower, etc.
Wherein the surge bin 11 is arranged adjacent to the boiler room. That is, the surge bin 11 can be arranged near the boiler room so as to be close to the boiler 17, thereby effectively saving the pressure head (energy of fluid per unit weight) of the conveying fan 14 and reducing the blocking probability of the powder conveying pipeline. The buffer bin 11 is smaller, is not a solid waste powder storage bin, and is used for reducing the pressure head of a pneumatic conveying fan, reducing the operation cost and slowing down the blockage of a conveying pipeline.
The storage bin with larger volume can be additionally arranged, and the storage bin has strict requirements on explosion prevention and fire prevention, and the problems of bridging of powder in the storage bin and the like are prevented.
In order to enhance the mixing effect of the dust and the air, the communication area has a wind-powder mixer 16. That is, the solid waste fuel (dust) in the surge bin 11 passes through the screw feeder 12 and the air lock 13, is mixed with the pressurized air at the outlet of the air cooler 15 in the air-powder mixer 16, and then flows into the boiler 17 to be burned.
The coal-fired power plant coupling solid waste power generation system provided by the embodiment of the invention comprises a waste gas conveying mechanism, wherein the waste gas conveying mechanism comprises a first induced draft fan 8, and an inlet of the first induced draft fan 8 is connected with a waste gas outlet of a dust removing mechanism; the outlet of the first induced draft fan 8 is connected with the air inlet of the blower or the external atmosphere 9. The blower may be a blower for performing secondary blowing to a subsequent device. When the exhaust gas discharged from the outlet of the first induced draft fan 8 meets the preset requirement (for example, the dust content is lower than the preset discharge content), the outlet of the first induced draft fan 8 can be connected with the external atmosphere.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A coal-fired power plant coupled solid waste power generation system, comprising:
the solid waste treatment system is used for treating the solid waste raw material (1) and comprises a preamble treatment mechanism, a first conveyor (4), a pulverizer (5), a dust removal mechanism, a waste gas conveying mechanism, a second conveyor (10), a buffer bin (11) and a feeding mechanism;
a coal-fired unit comprising a boiler (17), the boiler (17) having a secondary plenum (18);
wherein,
the preamble processing mechanism comprises a drier (22), wherein the drier (22) is provided with a raw material inlet for the solid waste raw material (1) to enter, a secondary air inlet for the heat supply secondary air (21) to enter, an output port for the dried material to output and an exhaust gas outlet for the exhaust gas generated by drying to output;
the waste gas outlet of the drier (22) is communicated with the secondary air chamber (18), and the output port is connected with the input end of the first conveyor (4);
the output of first conveyer (4) with the entry linkage of milling machine (5), the export of milling machine (5) with the entry linkage of dust removal mechanism, dust removal mechanism's waste gas export with waste gas conveying mechanism is connected, dust removal mechanism's material export with the input of second conveyer (10) is connected, the output of second conveyer (10) with surge bin (11) is connected, the export of surge bin (11) with feed mechanism's input is connected, feed mechanism's output with boiler (17) are connected.
2. The coal-fired power plant coupled solid waste power generation system of claim 1, wherein the boiler is provided with a primary air coal powder pipeline, and the output end of the feeding mechanism is connected with the primary air coal powder pipeline;
or the coal-fired power plant coupling solid waste power generation system is provided with a biomass burner, and the output end of the feeding mechanism is connected with the inlet of the biomass burner.
3. The coal-fired power plant coupling solid waste power generation system as claimed in claim 1, wherein the preamble processing mechanism further comprises a second dust remover (20) and a second induced draft fan (19);
the inlet of the second dust remover (20) is connected with the exhaust gas outlet of the desiccator (22), the outlet of the second dust remover (20) is connected with the inlet of the second induced draft fan (19), and the outlet of the second induced draft fan (19) is connected with the secondary air chamber (18).
4. The coal-fired power plant coupling solid waste power generation system according to claim 1, wherein the preamble processing mechanism further comprises an auxiliary conveying mechanism, and the auxiliary conveying mechanism comprises a scraper conveyor (2) and a primary crusher (3);
the input end of the scraper conveyor (2) is used for inputting the solid waste raw materials (1), the output end of the scraper conveyor (2) is connected with the inlet of the first-stage crusher (3), and the output end of the first-stage crusher (3) is connected with the input end of the first conveyor (4).
5. The coal-fired power plant coupled solid waste power generation system according to claim 4, further comprising a detection device for detecting the water content of the solid waste raw material (1);
when the water content of the solid waste raw material (1) is not higher than a preset value, conveying the solid waste raw material (1) to the input end of the scraper conveyor (2);
when the water content of the solid waste raw material (1) is higher than a preset value, the solid waste raw material (1) is conveyed to a raw material inlet of the drier (22).
6. The coal-fired power plant coupled solid waste power generation system according to claim 1, wherein the first conveyor (4) is an iron removal belt conveyor for removing waste metal in the solid waste raw material (1).
7. The coal-fired power plant coupling solid waste power generation system according to claim 1, wherein the dust removing mechanism comprises a cyclone dust remover (6) and a pulse bag dust remover (7);
the waste gas outlet of the cyclone dust collector (6) is connected with the inlet of the pulse cloth bag dust collector (7), and the waste gas outlet of the pulse cloth bag dust collector (7) is connected with the waste gas conveying mechanism;
the inlet of the cyclone dust collector (6) is connected with the outlet of the pulverizer (5), and the material outlets of the cyclone dust collector (6) and the pulse bag dust collector (7) are connected with the input end of the second conveyor (10).
8. The coal-fired power plant coupled solid waste power generation system of claim 1, wherein the feeding mechanism comprises:
one end of the feeding pipeline is connected with the outlet of the buffer bin (11) through a screw feeder (12), and the feeding pipeline is provided with an air lock (13); the buffer bin (11) is arranged adjacent to the boiler room;
the other end of the feeding pipeline is communicated with the communication area of the powder feeding pipeline, and one end of the powder feeding pipeline is connected with the boiler (17);
the air outlet of the conveying fan (14) is connected with the other end of the powder conveying pipeline;
-an air cooler (15), the air cooler (15) being adapted to cool the fluid in a pipe section of the powder feed pipe between the communication area and the conveying fan (14).
9. The coal-fired power plant coupled solid waste power generation system of claim 8, wherein the communication zone has a wind-powder mixer (16).
10. The coal-fired power plant coupled solid waste power generation system according to any one of claims 1 to 9, wherein the waste gas conveying mechanism comprises a first induced draft fan (8), and an inlet of the first induced draft fan (8) is connected with a waste gas outlet of the dust removing mechanism;
the outlet of the first induced draft fan (8) is connected with the air inlet of the forced draught blower or the external atmosphere (9).
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| CN202410036324.4A CN117704348A (en) | 2024-01-09 | 2024-01-09 | Coal-fired power plant coupling solid waste power generation system |
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| CN202410036324.4A CN117704348A (en) | 2024-01-09 | 2024-01-09 | Coal-fired power plant coupling solid waste power generation system |
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| CN117704348A true CN117704348A (en) | 2024-03-15 |
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