CN212504718U - Multi-fuel co-processing equipment for coal-fired power plant - Google Patents
Multi-fuel co-processing equipment for coal-fired power plant Download PDFInfo
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- CN212504718U CN212504718U CN202021881157.7U CN202021881157U CN212504718U CN 212504718 U CN212504718 U CN 212504718U CN 202021881157 U CN202021881157 U CN 202021881157U CN 212504718 U CN212504718 U CN 212504718U
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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
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
Abstract
The utility model discloses a coal fired power plant's many fuel deal with equipment in coordination, including power plant boiler, be provided with the high temperature exhanst gas outlet on the SCR reaction area of power plant boiler afterbody flue, the high temperature exhanst gas outlet is connected to rotatory reducing mechanism through smoke and dust separator, rotatory reducing mechanism's crushing thing exit linkage to dry straight tube, still be provided with wear-resisting material discharge port on the rotatory reducing mechanism, the lower part of dry straight tube is connected to well low moisture bunker through well low moisture fuel conveyor, the upper portion of dry straight tube is connected to high moisture bunker through high moisture fuel conveyor, the exhanst gas outlet at dry straight tube top is connected to mechanical breaker, be connected to low ignition point bunker through low ignition point fuel conveyor on the mechanical breaker, mechanical breaker's exit linkage to power plant boiler pan feeding mouth. The utility model discloses can realize that mud, living beings, domestic waste, the synchronous clean burning that industry was useless admittedly, simplify the flow, increase coal fired power plant fuel's adaptability.
Description
Technical Field
The utility model relates to a high-efficient coal-fired technical field, concretely relates to coal fired power plant's many first fuel equipment of dealing with in coordination.
Background
At present, the technical route of coupling power generation of coal electricity, biomass, coal electricity, sludge and coal electricity and garbage is pushed, and the high-temperature combustion system and the flue gas purification system of a coal-fired power plant are strived to realize the clean disposal and the recycling of urban and forestry wastes. Although the coal-electricity-biomass and coal-electricity-sludge mixed combustion process is mature day by day, the coal-electricity-garbage mixed combustion process is still in the research and development stage. Meanwhile, the three types of mixed combustion processes are limited by the difference of fuel characteristics, the process characteristics and main equipment are different, each type of mixed combustion process needs to establish a specific production line, the system is complex, and the total investment is high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a coal fired power plant's many fuel deal with equipment in coordination to solve the problem that prior art exists, the utility model discloses can realize mud, living beings, domestic waste, the synchronous cleanness of industry solid useless and burn the processing, process flow simplifies, saves the whole investment of engineering, has reduced system complexity, has increased coal fired power plant's fuel adaptability.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
the utility model provides a coal fired power plant's many fuel deal with in coordination equipment, including power boiler, be provided with the high temperature exhanst gas outlet on the SCR reaction area of power boiler afterbody flue, the high temperature exhanst gas outlet is connected to rotatory reducing mechanism through smoke and dust separator, rotatory reducing mechanism's crushing thing exit linkage to dry straight tube, still be provided with wear-resisting material discharge port on the rotatory reducing mechanism, the lower part of dry straight tube is connected to well low moisture bunker through well low moisture fuel conveyor, the upper portion of dry straight tube is connected to high moisture bunker through high moisture fuel conveyor, the exhanst gas outlet at dry straight tube top is connected to mechanical breaker, be connected to low ignition point bunker through low ignition point fuel conveyor on the mechanical breaker, mechanical breaker's exit linkage to power boiler's boiler pan feeding mouth.
Furthermore, a smoke induced draft fan is arranged between an outlet at the top of the drying straight pipe and the mechanical crushing device or between an outlet of the mechanical crushing device and a boiler feeding port.
Further, a crushed material outlet of the rotary crushing device is connected to the bottom of the drying straight pipe.
Further, the high-moisture fuel of the high-moisture fuel bin comprises municipal sludge and industrial sludge.
Further, the medium-low moisture fuel in the medium-low moisture fuel bin comprises bagasse, industrial solid waste and dried and compressed household garbage.
Further, the low-burning-point fuel of the low-burning-point fuel bin adopts agricultural and forestry waste.
Further, a primary gate-cutting device is arranged between the outlet of the high-moisture fuel conveying device and the inlet of the drying straight pipe.
Further, an air locking structure is arranged at an outlet of the mechanical crushing device.
Further, the attrition resistant discharge port is connected to a low moisture fuel delivery device.
Compared with the prior art, the utility model discloses following profitable technological effect has:
when the utility model is used, high temperature flue gas with the temperature of 350-400 ℃ is extracted from a high temperature flue gas outlet, the high temperature flue gas enters a drying straight pipe through a rotary crushing device after being dedusted by a smoke dust separation device, meanwhile, medium and low moisture fuel enters the drying straight pipe through a medium and low moisture fuel conveying device, high moisture fuel enters the drying straight pipe through the high moisture fuel conveying device, the medium and low moisture fuel and the high moisture fuel are dried under the action of the high temperature flue gas, large granular materials directly drop into the rotary crushing device under the action of gravity, are carried by the flue gas to be crushed and then are sent back to the drying straight pipe again, the outlet flue gas temperature of the drying straight pipe is 150-180 ℃, the flue gas and the low ignition point fuel crushed by a mechanical crushing device enter a boiler feeding port together to be circularly re-combusted, and the synchronous clean incineration disposal of the high moisture fuel, the medium and low moisture fuel and the, the process flow is simplified, saves the overall investment of the project, reduces the system complexity, increases the adaptability of the fuel of the coal-fired power plant, in addition, the utility model discloses use the flue gas as heat source and transmission medium, reduced the running cost, the low nitrogen of flue gas recirculation reforms transform the effect in addition simultaneously.
Specifically, the utility model discloses can realize that mud, living beings, domestic waste, industry are useless clean in step of burning handles admittedly.
Further, by providing the primary gate-off device, clogging of the drying straight pipe due to an excessively large volume of high-moisture fuel can be prevented.
Further, set up the gas locking structure through the exit at mechanical breaker, can prevent that the flue gas from anti-scurrying to mechanical breaker in, wearing and tearing equipment threatens the operation safety.
Drawings
FIG. 1 is a schematic diagram of the apparatus for the co-processing of multi-fuel in a coal-fired power plant.
The system comprises a power station boiler 1, an SCR reaction zone 2, a smoke dust separation device 3, a rotary crushing device 4, a drying straight pipe 5, a high-moisture fuel bin 6, a high-moisture fuel conveying device 7, a low-moisture fuel bin 8, a low-moisture fuel conveying device 9, a low-moisture fuel conveying device 10, a flue gas induced draft fan 11, a low-ignition-point fuel bin 12, a low-ignition-point fuel conveying device 13, a mechanical crushing device 14, a boiler feeding port 15, primary gate cutting equipment 16 and a wear-resistant material discharge port.
Detailed Description
The invention is described in further detail below with reference to the accompanying drawings:
referring to fig. 1, a coal-fired power plant multi-fuel cooperative processing device comprises a utility boiler 1, a high-temperature flue gas outlet is arranged on an SCR reaction zone 2 of a tail flue of the utility boiler 1, the high-temperature flue gas outlet is connected to a rotary crushing device 4 through a smoke dust separation device 3, a crushed material outlet of the rotary crushing device 4 is connected to a drying straight pipe 5, a wear-resistant material discharge port 16 is further arranged on the rotary crushing device 4, the lower part of the drying straight pipe 5 is connected to a medium-low moisture fuel bin 8 through a medium-low moisture fuel conveying device 9, the upper part of the drying straight pipe 5 is connected to a high-moisture fuel bin 6 through a high-moisture fuel conveying device 7, a flue gas outlet at the top of the drying straight pipe 5 is connected to a mechanical crushing device 13, the mechanical crushing device 13 is connected to a low-ignition point fuel bin 11 through a low-ignition fuel conveying.
A flue gas induced draft fan 10 is arranged between an outlet at the top of the drying straight pipe 5 and the mechanical crushing device 13, or between an outlet of the mechanical crushing device 13 and a boiler feeding port 14; the crushed material outlet of the rotary crushing device 4 is connected to the bottom of the drying straight pipe 5; the high-moisture fuel in the high-moisture fuel bin 6 comprises municipal sludge and industrial sludge; the medium-low moisture fuel in the medium-low moisture fuel bin 8 comprises bagasse, industrial solid waste and dried and compressed household garbage; the low-ignition-point fuel of the low-ignition-point fuel bin 11 is agricultural and forestry waste; a primary gate-cutting device 15 is arranged between the outlet of the high-moisture fuel conveying device 7 and the inlet of the drying straight pipe 5; an air locking structure is arranged at an outlet of the mechanical crushing device 13; the attrition resistant discharge port 16 is connected to the low moisture fuel delivery means 9.
The present invention will be described in further detail with reference to the following embodiments:
1. extracting medium-high temperature flue gas from an outlet of an SCR reaction area 2 of a tail flue of a power station boiler 1, and feeding the flue gas into a rotary crushing device 4 through a flue gas separation device 3;
2. the high-moisture fuel is conveyed into the drying straight pipe 5 from a high-moisture fuel bin 6 through a high-moisture fuel conveying device 7;
3. the medium-low moisture fuel is sent into the drying straight pipe 5 from the medium-low moisture fuel bin 8 through the medium-low moisture fuel conveying device 9;
4. the low-ignition-point fuel is sent into a mechanical crushing device 13 from a low-ignition-point fuel bin 11 through a low-ignition-point fuel conveying device 12;
5. the flue gas carries the small-particle fuel to be discharged from the top of the drying straight pipe 5, and after passing through the induced draft fan 10, the flue gas carries the mechanically crushed low-ignition-point fuel, and finally the fuel is sent to the boiler feeding port 14 for circulating reburning.
The step 1 specifically includes:
1-1, in order to ensure the drying effect of the materials, the temperature of the extracted flue gas needs to be controlled within a range of 350-400 ℃, and if the temperature of the flue gas cannot be ensured in some units, a small amount of flue gas can be extracted from the inlet of a superior heat exchanger for combination;
1-2, the rotary crushing device 4 can be modified to a certain extent by depending on the original coal mill of the coal-fired power plant, such as an air type impact crusher, an over-air type hammering crusher, a fan coal mill or a similar simplified device;
1-3, the material inlet of the rotary crushing device 4 is connected with the bottom of the drying straight pipe 5, and large-particle materials can directly fall into the rotary crushing device 4 under the action of gravity and are carried by smoke gas to be crushed and then are sent back to the drying straight pipe 5 again.
The step 2 specifically includes:
2-1, the high-moisture fuel mainly refers to municipal sludge and industrial sludge, the water content of the high-moisture fuel generally exceeds 70%, the viscosity of the high-moisture fuel is high, and the high-moisture fuel cannot be directly fed into a pulverized coal boiler for combustion;
2-2, because the drying straight pipe 5 is vertically arranged, the high-moisture fuel conveying device 7 can select a plunger pump or a specific flood pump, and in order to prevent the drying branch pipe from being blocked by overlarge volume of the pug, primary gate cutting equipment 15, such as a slitter, a gate cutting machine and the like, can be arranged at an inlet;
2-3, the wet sludge is primarily dried and crushed by hot flue gas in the falling process, the generated micro-dust particles are discharged from the top along with the flue gas, and the large-particle sludge falls into the rotary crushing device 4.
The step 3 specifically includes:
3-1, the medium-low moisture fuel mainly refers to bagasse, industrial solid waste non-hazardous waste, dry and compressed household garbage and other solid basically molded fuel with low viscosity, and can be directly sent into a bottom rotary crushing device 4;
3-2, the medium-low moisture fuel conveying device 9 can not select a plunger pump, and a scraper feeder, a belt feeder or a dragon conveyor is preferably adopted;
3-3, a wear-resistant material discharge port 16 of the rotary crushing device 4 can be connected with a low-moisture fuel conveying device 9 to realize circular crushing.
In the step 4, the method specifically comprises the following steps:
4-1, the low-ignition-point fuel mainly refers to combustible agricultural and forestry waste such as straws and wood, and the like, and has higher volatile content, and the lowest volatilization temperature is generally 200 ℃;
4-2, the mechanical crushing device 13 generally adopts a reel type structure and can be divided into a single reel and a double reel, and a roller coal mill is adopted in part of processes, for a pulverized coal boiler, if the crushed biomass particles are larger, the burnout effect can be influenced, so that the biomass particle size is recommended to be not more than 8mm, and for a circulating fluidized bed boiler, the particle size is not preferably more than 100 mm;
4-3, the mechanical crushing device 13 and the joint of the flue gas pipeline are additionally provided with a gas locking structure, so that the flue gas is prevented from reversely crossing the crushing equipment, the equipment is prevented from being abraded, and the operation safety is threatened.
4-4, the temperature of the flue gas at the outlet of the drying straight pipe 5 is 150-180 ℃, the oxygen content is low, and the deflagration of the low-ignition-point fuel cannot be caused.
The step 5 specifically includes:
5-1, in order to ensure the stability of the system, the flue gas induced draft fan 10 needs to adopt wear-resistant and corrosion-resistant blades, in order to prevent the crushed straws and wood from blocking the fan rotating structure, the flue gas induced draft fan 10 can be arranged in front of a mechanical crushing device, but if the crushing performance is better, the fan structure is reasonable, and the flue gas induced draft fan can also be arranged behind the mechanical crushing device 13;
5-2, conveying the multi-component fuel into a hearth for combustion by using the flue gas, wherein the boiler feed inlet 14 can be selected from an upper secondary air port, a limestone inlet in the boiler, an OFA air port, a newly-added opening and the like.
When in use, high-temperature flue gas with the temperature of 350-400 ℃ is extracted from the high-temperature flue gas outlet, the high-temperature flue gas enters the drying straight pipe 5 through the rotary crushing device 4 after being dedusted by the smoke dust separating device 3, meanwhile, the medium and low moisture fuel in the medium and low moisture fuel bin 8 enters the drying straight pipe 5 through the medium and low moisture fuel conveying device 9, the high moisture fuel in the high moisture fuel bin 6 enters the drying straight pipe 5 through the high moisture fuel conveying device 7, the medium and low moisture fuel and the high moisture fuel are dried under the action of high-temperature flue gas, large-particle materials directly fall into the rotary crushing device 4 under the action of gravity, the flue gas is carried by the flue gas to be crushed and then sent back to the drying straight pipe 5, the temperature of the flue gas at the outlet of the drying straight pipe 5 is 150-180 ℃, and the low-ignition-point fuel crushed by the mechanical crushing device 13 enters a boiler feeding port 14 together for circulating reburning.
Claims (9)
1. A device for the synergistic treatment of multi-fuel in a coal-fired power plant is characterized by comprising a power station boiler (1), wherein a high-temperature flue gas outlet is formed in an SCR reaction area (2) of a tail flue of the power station boiler (1), the high-temperature flue gas outlet is connected to a rotary crushing device (4) through a smoke dust separation device (3), a crushed material outlet of the rotary crushing device (4) is connected to a drying straight pipe (5), a wear-resistant material discharge port (16) is further formed in the rotary crushing device (4), the lower portion of the drying straight pipe (5) is connected to a medium-low moisture fuel bin (8) through a medium-low moisture fuel conveying device (9), the upper portion of the drying straight pipe (5) is connected to a high-moisture fuel bin (6) through a high-moisture fuel conveying device (7), a flue gas outlet at the top of the drying straight pipe (5) is connected to a mechanical crushing device (13), and the mechanical crushing device (13) is connected, the outlet of the mechanical crushing device (13) is connected to a boiler feeding port (14) of the utility boiler.
2. The multi-fuel co-processing equipment of the coal-fired power plant according to claim 1, characterized in that a flue gas induced draft fan (10) is arranged between the top outlet of the drying straight pipe (5) and the mechanical crushing device (13) or between the outlet of the mechanical crushing device (13) and the boiler feeding port (14).
3. The multi-fuel co-processing equipment of the coal-fired power plant as recited in claim 1, characterized in that the pulverized material outlet of the rotary pulverizing device (4) is connected to the bottom of the drying straight pipe (5).
4. The coal-fired power plant multi-fuel co-processing equipment according to claim 1, characterized in that the high-moisture fuel of the high-moisture fuel silo (6) comprises municipal sludge and industrial sludge.
5. The multi-fuel co-processing equipment of a coal-fired power plant as claimed in claim 1, wherein the low-moisture fuel in the low-moisture fuel bunker (8) comprises bagasse, industrial solid waste and dry compressed household garbage.
6. The multi-fuel co-processing equipment of the coal-fired power plant as recited in claim 1, wherein the low-burning point fuel of the low-burning point fuel bin (11) is agricultural and forestry waste.
7. The coal-fired power plant multi-fuel co-processing equipment according to claim 1, characterized in that a primary gate-cut equipment (15) is arranged between the outlet of the high-moisture fuel conveying device (7) and the inlet of the drying straight pipe (5).
8. The multi-fuel co-processing equipment of the coal-fired power plant as recited in claim 1, characterized in that an air lock structure is arranged at the outlet of the mechanical crushing device (13).
9. The coal-fired power plant multi-fuel co-processing equipment according to claim 1, characterized in that the wear-resistant discharge port (16) is connected to the medium-low moisture fuel delivery device (9).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021881157.7U CN212504718U (en) | 2020-09-01 | 2020-09-01 | Multi-fuel co-processing equipment for coal-fired power plant |
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| CN202021881157.7U CN212504718U (en) | 2020-09-01 | 2020-09-01 | Multi-fuel co-processing equipment for coal-fired power plant |
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| CN212504718U true CN212504718U (en) | 2021-02-09 |
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| CN202021881157.7U Active CN212504718U (en) | 2020-09-01 | 2020-09-01 | Multi-fuel co-processing equipment for coal-fired power plant |
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