Ash bucket ash amount self-adaptive adjusting system

By designing an adaptive adjustment system for ash volume of ash volume in the dust collector of a coal-fired power plant, the ash volume of each ash volume is monitored and adjusted in real time, the problem of uneven ash volume in the ash volume is solved, the frequency of ash is reduced, and the service life of the ash system is extended.

CN222714595UActive Publication Date: 2025-04-04润电能源科学技术有限公司
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Patent Information

Application Number
CN202421500408.0
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-06-27
Publication Date
2025-04-04
Estimated Expiration
2034-06-27

AI Technical Summary

Technical Problem

In the dust collector of coal-fired power plants, due to unreasonable current-balance plate settings, uneven flue gas flow rate and changes in power plant load, the ash volume in different ash buckets is uneven, which increases the frequency of ash transmission and shortens the service life of the ash transmission system.

Method used

Design an adaptive adjustment system for ash volume of ash volume of ash volume of ash volume, including dust collector ash volume, bin pump, ash feeding master pipe, air compressor, heater, ash library and ash volume secondary distribution system. Through high and low material level monitoring meter and ash volume secondary distribution system, the ash volume of each ash volume is monitored and adjusted in real time to avoid excessively fast loss of ash volume of ash volume at high material level.

Benefits of technology

By adjusting the amount of ash in the ash bucket, it is close to the designed capacity, reducing the frequency of ash transfer, reducing wear of ash transfer pipeline, and extending the service life of the ash transfer system.

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Abstract

The utility model discloses an ash bucket ash amount self-adaptive adjusting system, which comprises a dust remover ash bucket, a bin pump, an ash conveying main pipe, an air compressor, a heater, an ash silo, a fly ash transport vehicle and an ash amount secondary distribution system, and the dust remover ash bucket is respectively provided with a high material level monitoring meter, a middle-high material level monitoring meter, a middle material level monitoring meter and a low material level monitoring meter at different heights. A first pressure sensor is arranged on the ash conveying main pipe, the ash conveying main pipe is further connected with a secondary distribution main pipe, and the output end of the secondary distribution main pipe is connected with a dust remover ash hopper through a second control valve. And the ash quantity secondary distribution system is electrically connected with the high material level monitoring meter, the medium-high material level monitoring meter, the medium material level monitoring meter, the low material level monitoring meter and the first pressure sensor respectively. According to the utility model, the amount of ash in different ash buckets of the coal-fired power plant can be adjusted, and ash removal is carried out only when the amount of ash in each ash bucket is full, so that the ash removal frequency is reduced, the abrasion degree of an ash conveying pipeline is reduced, and the service life of an ash conveying system is prolonged.
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Description

Technical Field

[0001] The utility model belongs to the field of dust removal equipment for coal-fired power plants, and in particular relates to an ash hopper ash quantity self-adaptive adjustment system. Background Art

[0002] Dust removal in coal-fired power plants is one of the important environmental protection measures in the process of coal-fired power generation. Its main purpose is to reduce the emission of atmospheric pollutants and improve air quality. At present, the dust collector in coal-fired power plants often causes uneven ash content in each ash hopper in the same power plant due to unreasonable flow plate setting, uneven flue gas flow rate, and load changes in power plants. Based on the design principle of the ash conveying system pipeline, the ash conveying system of the same power plant is generally connected in series into one or two independent ash conveying units, and ash conveying is carried out at the same time. This ash conveying method will result in different ash amounts in different ash hoppers of the same power plant. The ash amount in some ash hoppers has reached a high material level, while the ash amount in some ash hoppers has not reached a high material level or is even still in a low material level state. However, because the ash amount in some ash hoppers has reached a high material level, in order to ensure the safe operation of the high-level ash hopper, the power field must be forced to convey ash, which will lead to an increase in the frequency of ash conveying, thereby increasing the degree of wear of the ash conveying pipeline and reducing the service life of the ash conveying system. Therefore, in order to avoid the shortcomings of the prior art, it is necessary to improve the prior art. Utility Model Content

[0003] The utility model aims to provide an ash hopper ash quantity adaptive adjustment system, which can adjust the ash quantity in different ash hoppers of a coal-fired power plant so that the ash quantity of each ash hopper is close to the designed capacity before ash delivery, thereby reducing the frequency of ash delivery, reducing the degree of wear of the ash delivery pipeline, and extending the service life of the ash delivery system.

[0004] In order to solve the above technical problems, the technical solutions adopted by the utility model are as follows:

[0005] An ash hopper ash quantity adaptive adjustment system comprises a dust collector ash hopper, a silo pump, an ash conveying mother pipe, an air compressor, a heater, an ash storage and an ash quantity secondary distribution system, wherein the dust collector ash hopper is provided with a plurality of ash collector ash hoppers, and the plurality of ash collector ash hoppers are arranged in parallel, each of the ash collector ash hoppers is connected to a silo pump, and each of the ash collector ash hoppers is provided with a high material level monitoring meter, a middle-high material level monitoring meter, a middle material level monitoring meter and a low material level monitoring meter at intervals from top to bottom, the output end of the dust collector ash hopper is connected to the input end of the silo pump through a feed valve, the output end of each of the silo pumps is connected to the ash conveying mother pipe through a discharge valve, the output end of the air compressor is connected to the feed valve The input end of the heater is connected, and the output end of the heater is connected to each of the silo pumps respectively. An air intake valve is provided between the output end of the heater and each of the silo pumps. The input end of the ash bin is connected to the output end of the ash conveying mother pipe through a first control valve. The ash conveying mother pipe is provided with a first pressure sensor. The ash conveying mother pipe is also bypass-connected with a secondary distribution mother pipe. The output end of the secondary distribution mother pipe is connected to the ash hopper of the dust collector through a second control valve. The ash secondary distribution system is electrically connected to the high material level monitor, the mid-high material level monitor, the mid material level monitor, the low material level monitor and the first pressure sensor respectively.

[0006] As a preferred solution of the above-mentioned ash hopper ash amount adaptive adjustment system, an emergency ash outlet for temporary ash discharge is provided at the bottom of the dust collector ash hopper.

[0007] As a preferred solution of the above-mentioned ash hopper ash quantity adaptive adjustment system, the ash quantity secondary distribution system and the ash conveying control system of the coal-fired power plant transmit signals through the MODBUS 485 / MODBUS RTU / OPC communication protocol, and the two systems can maintain information exchange while operating independently.

[0008] As a preferred solution of the above-mentioned ash hopper ash amount adaptive adjustment system, an exhaust pipe and an exhaust valve are also provided on the upper part of the dust collector ash hopper.

[0009] As a preferred solution of the above-mentioned ash hopper ash quantity adaptive adjustment system, the inner wall of the ash conveying main pipe and the inner wall of the secondary distribution main pipe are provided with a lining for improving wear resistance.

[0010] As a preferred solution of the above-mentioned ash hopper ash amount adaptive adjustment system, the secondary distribution main pipe is also connected to a branch pipeline, and the secondary distribution main pipe is connected to each of the silo pumps through the branch pipeline.

[0011] As a preferred solution of the above-mentioned ash hopper ash amount adaptive adjustment system, a third control valve is provided on the branch pipeline.

[0012] As a preferred solution of the above-mentioned ash hopper ash amount adaptive adjustment system, the secondary distribution main pipe is connected to each of the dust collector ash hoppers respectively, and a fourth control valve is provided between the secondary distribution main pipe and each of the dust collector ash hoppers.

[0013] As a preferred solution of the above-mentioned ash hopper ash amount adaptive adjustment system, a first outlet control valve is provided between the air compressor and the heater, and a second outlet control valve is also provided at the output end of the heater.

[0014] As a preferred solution of the above-mentioned ash hopper ash quantity adaptive adjustment system, the ash hopper ash quantity adaptive adjustment system also includes a fly ash transport vehicle, which is connected to the output end of the ash bin and transports the fly ash to outside the factory.

[0015] The ash hopper ash quantity adaptive adjustment system provided by the utility model has the following beneficial effects compared with the prior art:

[0016] The utility model can adjust the ash amounts in different ash hoppers of a coal-fired power plant. With the operation of the coal-fired units, fly ash is continuously collected into the dust collector ash hopper. The high material level monitoring meter, the medium-high material level monitoring meter, the medium material level monitoring meter and the low material level monitoring meter in the dust collector ash hopper will transmit the material level signal to the ash secondary distribution system in real time. When any of the dust collector ash hoppers in the same power plant that share a common ash conveying busbar shows that the ash amount has reached the medium-high material level and the ash amount of not all dust collector ash hoppers has reached the medium-high material level, the ash secondary distribution system is started. At this time, the feed valve of the dust collector ash hopper whose ash amount has reached the medium-high material level is opened to allow the ash to enter the silo pump until the ash amount in the dust collector ash hopper reaches below the medium material level, and the feed valve is closed. At this time, the ash is in the silo pump, and the air compressor is turned on. The air of the air compressor is heated by the heater and then the air intake is turned on. The valve is connected to the silo pump, and the heated compressed air fluidizes the fly ash in the silo pump, and then the discharge valve is opened, and the fluidized fly ash in the silo pump is transported to the ash conveying mother pipe. When the first pressure sensor on the ash conveying mother pipe reaches the set value P1, the second control valve is opened to allow the fly ash in the ash conveying mother pipe to enter the dust collector ash hopper with low ash volume through the secondary distribution mother pipe, thereby adjusting the ash volume between each dust collector ash hopper to avoid the situation where the ash volume in the existing dust collector ash hopper has reached a high material level but the ash volume in some individual dust collector ash hoppers is displayed at a medium material level. When the ash volume in all dust collector ash hoppers reaches a medium-high material level, the first control valve is opened to transport the fly ash to the ash bin, which is then transported out of the factory by a fly ash transport vehicle. This avoids frequent cleaning and reduces the frequency of cleaning, thereby reducing the wear of the ash conveying pipeline and extending the service life of the ash conveying system. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the drawings of the embodiment will be briefly introduced below.

[0018] Figure 1 It is a schematic diagram of the utility model ash hopper ash quantity adaptive adjustment system;

[0019] Figure 2 It is a program flowchart of the ash secondary distribution system of the utility model.

[0020] Markings in the figure:

[0021] 10. Dust collector ash hopper; 101. Exhaust valve; 102. High material level monitor; 103. Middle material level monitor; 104. Low material level monitor; 105. Emergency ash outlet; 20. Silo pump; 201. Feed valve; 202. Discharge valve; 203. Inlet valve; 21. Ash delivery branch; 22. Ash delivery main pipe; 30. Air compressor; 301. First outlet control valve; 40. Heater; 401. Second outlet control valve; 50. Ash storage; 60. Fly ash transport vehicle; 70. Ash secondary distribution control system; 701. Middle and high material level monitor; 71. First pressure sensor; 702. Second control valve; 703. First control valve; 72. Secondary distribution main pipe; 704. Fourth control valve; 705. Third control valve; 80. Ash delivery control system. DETAILED DESCRIPTION

[0022] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0023] In the description of the present invention, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0024] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0025] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0026] Please also read Figure 1 to Figure 2 Now, the ash hopper ash amount adaptive adjustment system provided by the embodiment of the utility model is described.

[0027] like Figure 1 to Figure 2 As shown, the ash hopper ash quantity adaptive adjustment system of the utility model comprises a dust collector ash hopper 10, a silo pump 20, an ash conveying mother pipe 22, an air compressor 30, a heater 40, an ash storage 50 and an ash quantity secondary distribution system, wherein the dust collector ash hopper 10 is provided with a plurality of dust collector ash hoppers 10, and the plurality of dust collector ash hoppers 10 are arranged in parallel, each of the dust collector ash hoppers 10 is connected to a silo pump 20, and each of the dust collector ash hoppers 10 is provided with a high material level monitoring meter 102, a medium-high material level monitoring meter 701102, a medium material level monitoring meter 103 and a low material level monitoring meter 104 at intervals from top to bottom, the output end of the dust collector ash hopper 10 is connected to the input end of the silo pump 20 through a feed valve 201, and the output end of each of the silo pumps 20 is connected to the ash conveying mother pipe 22 through a discharge valve 202, and the output end of the air compressor 30 It is connected to the input end of the heater 40, and the output end of the heater 40 is respectively connected to each of the silo pumps 20. An air intake valve 203 is provided between the output end of the heater 40 and each of the silo pumps 20. The input end of the ash bin 50 is connected to the output end of the ash conveying main pipe 22 through a first control valve 703. A first pressure sensor 71 is provided on the ash conveying main pipe 22. The ash conveying main pipe 22 is also bypass-connected with a secondary distribution main pipe 72. The output end of the secondary distribution main pipe 72 is connected to the dust collector ash hopper 10 through a second control valve 702. The ash secondary distribution system is electrically connected to the high material level monitor 102, the middle and high material level monitor 701102, the middle material level monitor 103, the low material level monitor 104 and the first pressure sensor 71, respectively.

[0028] An ash conveying branch 21 is provided between the output end of each silo pump 20 and the ash conveying main pipe 22 , and each silo pump 20 conveys the fly ash outputted from the silo pump 20 to the ash conveying main pipe 22 through the ash conveying branch 21 .

[0029] Exemplarily, an emergency ash outlet 105 for temporary ash discharge is provided at the bottom of the dust collector ash hopper 10. When an operation failure occurs in the ash conveying system, the ash can be discharged through the emergency ash outlet 105 without causing a system safety operation accident.

[0030] Exemplarily, the ash secondary distribution system and the ash conveying control system 80 of the coal-fired power plant transmit signals via MODBUS485 / MODBUS RTU / OPC communication protocol, and the two systems can maintain information exchange while operating independently.

[0031] like Figure 2 As shown, the ash secondary distribution system is started when signal monitoring shows that among the dust collector ash hoppers 10 that share an ash conveying busbar in the same electric field, any of the dust collector ash hoppers 10 shows a medium-high material level, and not all ash hoppers have reached the medium-high material level.

[0032] The feed valve 201 of the silo pump 20 showing the medium-high material level is opened. When the medium-high material level ash hopper reaches the medium material level or below the medium material level, the system automatically closes the feed valve 201 of the silo pump 20. Keep the feed valve 201 and the discharge valve 202 of the silo pump 20 closed at the same time, the compressed air inlet valve 203 of the silo pump 20 is opened, the first outlet control valve 301 of the air compressor 30 is opened, and the compressed air is heated by the heater 40 to further fluidize the fly ash. The second outlet control valve 401 of the heater 40 is opened, and the compressed air is delivered to the silo pump 20 through the pipeline. When the pressure in the silo pump 20 reaches the set value, the discharge valve 202 of the silo pump 20 is opened to deliver the fly ash to the ash delivery main pipe 22.

[0033] Keep the discharge valve 202 of the silo pump 20 open, the gas-ash mixture in the silo pump 20 enters the ash conveying main pipe 22, the first pressure sensor 71 is electrically connected to the second control valve 702, when the reading of the first pressure sensor 71 reaches the set value P1, at this time, the second control valve 702 from the ash conveying main pipe 22 to the ash secondary distribution main pipe 72 is opened, the first control valve 703 remains closed, and the fly ash is conveyed to the ash hopper ash secondary distribution main pipe 72 through the conveying pipeline, and the ash hopper ash secondary distribution main pipe 72 transfers the fly ash Remixing and secondary distribution are carried out. According to the remote monitoring data of the ash hopper material level, the secondary distributed ash amount will be distributed in the ash hopper according to the priority of low material level > middle material level > high material level. At this time, the fourth control valve 704 of the dust collector ash hopper 10 with the lowest ash hopper level is opened, and the fly ash will enter the dust collector ash hopper 10 again through the pipeline. When the ash amount in the ash hopper reaches the middle material level and below the high material level, the secondary distributed ash amount will enter the next ash hopper in turn according to the priority order, and the process is repeated.

[0034] As the dust collector ash hopper 10 continuously collects fly ash falling from the dust collector body, when the ash secondary distribution system detects that the ash hopper material level of the same power plant sharing the same ash conveying busbar has reached the middle and high material level, the ash secondary distribution system and the ash conveying control system 80 of the coal-fired power plant transmit material level signals through the MODBUS 485 / MODBUS RTU / OPC communication protocol to start the ash conveying control system 80. All the silo pumps 20 feed valves 201 of the dust collector in the same power plant are opened at the same time, and when the ash level of the silo hopper 10 of the dust collector reaches the low material level or below, the system automatically closes the silo pump 20 feed valve 201.

[0035] Keep the inlet valve 201 and the outlet valve 202 of the silo pump 20 closed at the same time, open the air inlet valve 203 of the silo pump 20, open the first outlet control valve 301 of the air compressor 30, heat the compressed air through the heater 40 to further fluidize the fly ash, open the second outlet control valve 401 of the heater 40, and deliver the compressed air to the silo pump 20 through the pipeline. When the pressure in the silo pump 20 reaches the set value, the outlet valve 202 of the silo pump 20 opens to deliver the fly ash to the ash delivery main pipe 22.

[0036] Keep the discharge valve 202 of the silo pump 20 open, the gas-ash mixture in the silo pump 20 enters the ash conveying main pipe 22, the first pressure sensor 71 is electrically connected to the first control valve 703, when the reading of the first pressure sensor 71 reaches the set value P2, at this time, the first control valve 703 is opened, the second control valve 702 is closed, at this time the pressure in the silo pump 20 remains stable, the fly ash is transported to the ash bin 50 through the ash conveying main pipe 22, when the ash amount in the ash bin 50 reaches the set value, the fly ash transport vehicle 60 will transport the fly ash to outside the factory. When the fly ash is transported, the resistance of the ash conveying main pipe 22 decreases, the pressure drops to the lower limit, and the transportation stage ends.

[0037] Keep the discharge valve 202 of the silo pump 20 open, the second control valve 702 open, the first control valve 703 open, the third control valve 705 open, keep the feed valve 201 of the silo pump 20 closed, the fourth control valve 704 closed, the exhaust valve 101 on the upper part of the dust collector ash hopper 10 closed, and perform the secondary ash conveying pipeline and the ash conveying main pipe 22 cleaning process to ensure that there is no fly ash residue in the system. After the purge is completed, the dust collector ash conveying system closes all valves and enters the next cycle.

[0038] Exemplarily, an exhaust pipe and an exhaust valve 101 are also provided on the upper portion of the dust collector ash hopper 10 to prevent ash from escaping from the ash hopper and to alleviate the excessive pressure in the ash hopper caused by secondary ash collection.

[0039] Exemplarily, the inner wall of the ash conveying main pipe 22 and the inner wall of the secondary distribution main pipe 72 are provided with a lining for improving wear resistance, such as wear-resistant rubber and wear-resistant polymer, to extend the service life of the pipeline.

[0040] Exemplarily, the secondary distribution main pipe 72 is also connected to a branch pipe, and the secondary distribution main pipe 72 is connected to each of the silo pumps 20 through the branch pipe. The branch pipe is used for the cleaning process of the secondary ash conveying pipeline and the ash conveying main pipe 22 to ensure that no fly ash remains in the pipeline.

[0041] Exemplarily, a third control valve 705 is provided on the branch pipeline. During the cleaning process, the discharge valve 202 of the silo pump 20 is kept in an open state, the second control valve 702 is opened, the first control valve 703 is opened, the third control valve 705 is opened, the feed valve 201 of the silo pump 20 is kept in a closed state, the fourth control valve 704 is closed, and the exhaust valve 101 on the upper part of the dust collector ash hopper 10 is closed, and the secondary ash conveying pipeline and the ash conveying main pipe 22 are cleaned to ensure that there is no fly ash residue in the system.

[0042] Exemplarily, the secondary distribution main pipe 72 is connected to each of the dust collector ash hoppers 10, respectively, and a fourth control valve 704 is provided between the secondary distribution main pipe 72 and each of the dust collector ash hoppers 10. The fourth control valve 704 is used to control which specific dust collector ash hopper 10 the fly ash enters when adjusting and distributing the ash amount.

[0043] Exemplarily, a first outlet control valve 301 is provided between the air compressor 30 and the heater 40, and a second outlet control valve 401 is also provided at the output end of the heater 40. The first outlet control valve 301 and the second outlet control valve 401 respectively control the air of the air compressor 30 and the heater 40 to be output to the ash conveying pipeline.

[0044] Exemplarily, the ash hopper ash quantity adaptive adjustment system further includes a fly ash transport vehicle 60 , wherein the fly ash transport vehicle 60 is connected to the output end of the ash storage 50 , and the fly ash transport vehicle 60 transports the fly ash to outside the factory.

[0045] The ash hopper ash quantity adaptive adjustment system provided by the utility model has the following beneficial effects compared with the prior art:

[0046] The utility model can adjust the ash amount in different ash hoppers of a coal-fired power plant. With the operation of the coal-fired unit, fly ash is continuously collected in the dust collector ash hopper 10. The high material level monitoring meter 102, the medium-high material level monitoring meter 701, the medium material level monitoring meter 103, and the low material level monitoring meter 104 of the dust collector ash hopper 10 will transmit the material level signal to the ash secondary distribution system in real time. When any of the dust collector ash hoppers 10 sharing a common ash delivery busbar in the same power plant is 0 shows that the ash volume has reached the medium-high level and the ash volume in not all dust collector ash hoppers 10 has reached the medium-high level, the ash volume secondary distribution system is started. At this time, the feed valve 201 of the dust collector ash hopper 10 with the ash volume reaching the medium-high level is opened, so that the ash enters the silo pump 20, until the ash volume in the dust collector ash hopper 10 reaches below the medium level, and the feed valve 201 is closed. At this time, the ash is in the silo pump 20, and the air compressor 30 is turned on. The air in the air compressor 30 is heated by the heater 40 and then turned on. The air inlet valve 203 is connected to the silo pump 20, and the heated compressed air fluidizes the fly ash in the silo pump 20, and then the discharge valve 202 is opened, and the fluidized fly ash in the silo pump 20 is transported to the ash conveying main pipe 22. When the first pressure sensor 71 on the ash conveying main pipe 22 reaches the set value P1, the second control valve 702 is opened to allow the fly ash in the ash conveying main pipe 22 to enter the dust collector ash hopper 10 with low ash volume through the secondary distribution main pipe 72, thereby adjusting the ash volume between each dust collector ash hopper 10 to avoid the situation where the ash volume in some dust collector ash hoppers 10 is full but the ash volume in some dust collectors is still very small. When the ash volume in all dust collector ash hoppers 10 reaches the monitoring height of the medium and high material level monitoring meter 701, the first control valve 703 is opened to transport the fly ash to the ash storage 50, and the fly ash transport vehicle 60 transports it out of the factory. This avoids frequent cleaning and reduces the frequency of cleaning, thereby reducing the wear of the ash conveying pipeline and extending the service life of the ash conveying system.

[0047] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and substitutions can be made without departing from the technical principle of the present invention. These improvements and substitutions should also be regarded as the protection scope of the present invention.

Claims

1. An ash hopper ash quantity adaptive adjustment system, characterized in that: It includes dust collector ash hopper, silo pump, ash conveying main pipe, air compressor, heater, ash silo and ash secondary distribution system; The dust collector ash hopper is provided with a plurality of dust collector ash hoppers, the plurality of dust collector ash hoppers are arranged in parallel, and each of the dust collector ash hoppers is connected to a silo pump; A high material level monitoring meter, a middle-high material level monitoring meter, a middle material level monitoring meter and a low material level monitoring meter are arranged in intervals from top to bottom in each of the dust collector hoppers. The output end of the dust collector hopper is connected to the input end of the silo pump through a feed valve, and the output end of each silo pump is connected to the ash conveying main pipe through a discharge valve. The output end of the air compressor is connected to the input end of the heater, the output end of the heater is communicated with each of the silo pumps respectively, and an air intake valve is provided between the output end of the heater and each of the silo pumps; The input end of the ash storage is connected to the output end of the ash conveying main pipe through a first control valve; The ash conveying main pipe is provided with a first pressure sensor, and the ash conveying main pipe is also connected to a secondary distribution main pipe in a bypass manner, and the output end of the secondary distribution main pipe is connected to the ash hopper of the dust collector through a second control valve; The ash secondary distribution system is electrically connected to the high material level monitor, the mid-high material level monitor, the mid material level monitor, the low material level monitor and the first pressure sensor, respectively.

2. The ash hopper ash quantity adaptive adjustment system according to claim 1 is characterized in that: An emergency ash outlet for temporary ash discharge is arranged at the bottom of the ash hopper of the dust collector.

3. The ash hopper ash quantity adaptive adjustment system according to claim 1 is characterized in that: The ash secondary distribution system and the ash conveying control system of the coal-fired power plant transmit signals via the MODBUS 485 / MODBUS RTU / OPC communication protocol, and the two systems can maintain information exchange while operating independently.

4. The ash hopper ash quantity adaptive adjustment system according to claim 1 is characterized in that: An exhaust pipe and an exhaust valve are also provided on the upper part of the dust collector ash hopper.

5. The ash hopper ash quantity adaptive adjustment system according to claim 1, characterized in that: The inner wall of the ash conveying main pipe and the inner wall of the secondary distribution main pipe are provided with a lining for improving wear resistance.

6. The ash hopper ash quantity adaptive adjustment system according to claim 1, characterized in that: The secondary distribution main pipe is also connected to a branch pipe, and the secondary distribution main pipe is connected to each of the silo pumps through the branch pipe.

7. The ash hopper ash quantity adaptive adjustment system according to claim 6, characterized in that: The branch pipeline is provided with a third control valve.

8. The ash hopper ash quantity adaptive adjustment system according to claim 7, characterized in that: The secondary distribution main pipe is communicated with each of the dust collector ash hoppers respectively, and a fourth control valve is arranged between the secondary distribution main pipe and each of the dust collector ash hoppers.

9. The ash hopper ash quantity adaptive adjustment system according to claim 1, characterized in that: A first outlet control valve is arranged between the air compressor and the heater, and a second outlet control valve is also arranged at the output end of the heater.

10. The ash hopper ash quantity adaptive adjustment system according to claim 1, characterized in that: The ash hopper ash quantity adaptive adjustment system also includes a fly ash transport vehicle, which is connected to the output end of the ash bin and transports the fly ash to outside the factory.

Citation Information

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