CN218538492U - Thermal power plant single furnace gas power ash conveying system - Google Patents
Thermal power plant single furnace gas power ash conveying system Download PDFInfo
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- CN218538492U CN218538492U CN202222961998.4U CN202222961998U CN218538492U CN 218538492 U CN218538492 U CN 218538492U CN 202222961998 U CN202222961998 U CN 202222961998U CN 218538492 U CN218538492 U CN 218538492U
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Abstract
The utility model discloses a thermal power plant single furnace gas power ash conveying system, wherein a connecting pipe is communicated between an economizer ash conveying pipe and an electrostatic dust collector ash conveying pipe, and a switching valve is respectively arranged at the joint of the connecting pipe and the economizer ash conveying pipe and at the tail end of the connecting pipe; an ash conveying and air supplementing pipeline is communicated between the connecting pipe and the compressed air pipeline. The advantages are that: the operation of the system in the initial starting stage is unstable, and the connection pipe is isolated from the system through the two switching valves, so that the ash conveying unit of the economizer and the ash conveying unit of the electrostatic dust collector are independently conveyed, the ash conveying pipe of the electrostatic dust collector is prevented from being blocked, and the normal operation of the electrostatic dust collector is ensured; when the system runs stably, the switching valve is controlled, so that coarse ash falling from the ash bucket of the economizer is mixed with fine ash in the ash conveying pipe of the electrostatic precipitator along the connecting pipe for conveying, the abrasion of the ash conveying pipe of the electrostatic precipitator can be reduced, the abrasion of the ash conveying pipe of the economizer can be slowed down, the consumption of compressed air is saved, the service life is prolonged, and the maintenance cost is reduced.
Description
The technical field is as follows:
the utility model relates to a thermal power plant produces technical field, in particular to single stove gas power ash conveying system of thermal power plant.
Background art:
in the operation process of a thermal power plant, the existing pneumatic ash conveying system of a boiler generally has two conveying modes: firstly, coarse ash of the economizer independently flows to an ash silo or a slag bin through an ash pipe; the method has the disadvantages that the ash pipe is seriously abraded, the ash leakage of the pipeline can happen after one year, the maintenance is frequent, the consumption of compressed air is large, the cost is high, and the pipe is easily blocked if the air quantity is too small; the coarse ash of the economizer is put into an ash pipe of the electric bag dust collector and then is conveyed to an ash storehouse together, and the ash conveyed by the ash pipe of the electric bag dust collector is relatively fine, so that the ash conveying mode has the advantages that the fine ash carries the coarse ash, the abrasion to a pipeline is smaller than that of the single conveying of the coarse ash, and the defect that the coarse ash of the economizer can cause the blockage of an ash conveying system of the dust collector when the system is abnormal or the coal quality is abnormal at the initial starting stage, and the operation of a pneumatic ash conveying system of the economizer is influenced when the ash conveying system of the dust collector is abnormal; in addition, the pipeline of the existing ash conveying system is often blocked, which seriously affects the production efficiency.
The utility model has the following contents:
an object of the utility model is to provide a flexible and switching convenience of operation mode is favorable to improving defeated grey system reliability and the defeated grey system of single stove gas power of thermal power plant of the wearing and tearing of reduction system in order to reduce the maintenance cost.
The utility model discloses by following technical scheme implement: the thermal power plant single furnace pneumatic ash conveying system comprises an economizer ash conveying unit, an electrostatic dust collector ash conveying unit and a bag-type dust collector ash conveying unit; the economizer ash conveying unit comprises an economizer ash conveying pipe and a plurality of economizer pneumatic dome valves connected in series on the economizer ash conveying pipe; the air inlet of the first economizer pneumatic dome valve is communicated with a compressed air pipeline along the material conveying direction, the top feeding port of the economizer pneumatic dome valve is communicated with an economizer ash hopper through a discharging pipe, and the tail end of the economizer ash conveying pipe is communicated with a first coarse ash warehouse; the electrostatic dust collector ash conveying unit comprises an electrostatic dust collector ash conveying pipe and a plurality of electrostatic dust collector pneumatic dome valves which are connected to the electrostatic dust collector ash conveying pipe in series; the air inlet of the first pneumatic dome valve of the electrostatic dust collector is communicated with the compressed air pipeline along the material conveying direction, the top feeding port of the pneumatic dome valve of the electrostatic dust collector is communicated with an ash hopper of the electrostatic dust collector, and the tail end of the ash conveying pipe of the electrostatic dust collector is communicated with the second coarse ash warehouse; the bag-type dust collector dust conveying unit comprises a bag-type dust conveying pipe and a plurality of bag-type pneumatic dome valves connected in series on the bag-type dust conveying pipe; the air inlet of the first bag-type pneumatic dome valve in the material conveying direction is communicated with the compressed air pipeline, the top feeding port of the bag-type pneumatic dome valve is communicated with a bag-type dust collector ash hopper, and the tail end of the bag-type ash conveying pipe is communicated with a fine ash warehouse; a connecting pipe is communicated between the economizer ash conveying pipe and the electrostatic dust collector ash conveying pipe, and a switching valve is respectively arranged at the joint of the connecting pipe and the economizer ash conveying pipe and at the tail end of the connecting pipe; and a dust conveying air supply pipeline is communicated between the connecting pipe and the compressed air pipeline, and an air supply valve is arranged on the dust conveying air supply pipeline.
Furthermore, a dredging return pipe is communicated with the coal economizer ash conveying pipe at the discharge port of the last coal economizer pneumatic dome valve and the electrostatic dust collector ash conveying pipe at the discharge port of the last electrostatic dust collector pneumatic dome valve along the material conveying direction, discharge ports of the two dredging return pipes correspondingly extend into the coal economizer ash hopper and the electrostatic dust collector ash hopper, and a blocking discharge valve is installed on the dredging return pipe.
Furthermore, a dredging pipe is communicated between the ash conveying pipe of the coal economizer adjacent to the first coarse ash silo and the compressed air pipeline, and a dredging valve is mounted on the dredging pipe.
Further, sleeve compensators are respectively arranged on the economizer ash conveying pipe at the inlet of the economizer pneumatic dome valve, the electrostatic dust collector ash conveying pipe at the inlet of the electrostatic dust collector pneumatic dome valve and the cloth bag ash conveying pipe at the inlet of the cloth bag pneumatic dome valve.
Furthermore, an auxiliary conveying pipeline is communicated with the compressed air pipeline on the economizer ash conveying pipe at the discharge port of each economizer pneumatic dome valve, and an auxiliary air replenishing valve is installed on the auxiliary conveying pipeline.
Furthermore, an assisting ash conveying pipe is respectively communicated with the compressed air pipeline on the ash conveying pipe of the electrostatic dust collector and the ash conveying pipe of the cloth bag.
The utility model has the advantages that: at the initial starting stage of normal operation of the system, the phenomenon of unstable operation exists, at the moment, the connection pipe is isolated from the system through the two switching valves, namely, dust does not pass through the connection pipe, coarse ash falling from an ash bucket of the coal economizer is conveyed into a first coarse ash storehouse along an ash conveying pipe of the coal economizer, ash falling from an ash bucket of the electrostatic dust collector is conveyed into a second coarse ash storehouse along an ash conveying pipe of the electrostatic dust collector, so that the short-time independent conveying is realized, the ash conveying pipe of the electrostatic dust collector is prevented from being blocked, and the normal operation of the electrostatic dust collector is ensured; when the system runs stably, a switching valve at the starting end of the connecting pipe is controlled, the economizer ash conveying pipe at the rear section is cut off, the time for conveying coarse ash by the economizer ash conveying pipe alone is reduced, and the switching valve at the tail end of the connecting pipe is opened, so that the coarse ash falling from an ash hopper of the economizer is mixed and conveyed with fine ash in the ash conveying pipe of the electrostatic dust collector along the connecting pipe, the abrasion of the ash conveying pipe of the electrostatic dust collector can be reduced, the abrasion of the ash conveying pipe of the economizer can be slowed down, the service life of the whole system is prolonged, and the maintenance cost is reduced; and when the ash conveying unit of the electrostatic dust collector is abnormal in operation, the ash conveying unit of the coal economizer can independently operate by controlling the switching valve, so that the coarse ash in the ash hopper of the coal economizer can be ensured to continuously and normally operate through the ash conveying pipe of the coal economizer.
Description of the drawings:
fig. 1 is a schematic structural diagram of the present invention.
The components in the drawings are numbered as follows: the device comprises an economizer ash conveying unit 1, an economizer ash conveying pipe 1.1, an economizer pneumatic dome valve 1.2, an economizer ash hopper 1.3, an electrostatic dust collector ash conveying unit 2, an electrostatic dust collector ash conveying pipe 2.1, an electrostatic dust collector pneumatic dome valve 2.2, an electrostatic dust collector ash hopper 2.3, a bag-type dust collector ash conveying unit 3, a bag-type ash conveying pipe 3.1, a bag-type pneumatic dome valve 3.2, a bag-type dust collector ash hopper 3.3, a compressed air pipeline 4, a first coarse ash warehouse 5, a second coarse ash warehouse 6, a fine ash warehouse 7, a connecting pipe 8, a switching valve 9, an ash conveying and air supplementing pipeline 10, an air supplementing valve 11, a dredging return pipe 12, a blocking discharge valve 13, a dredging pipe 14, a dredging valve 15, a sleeve compensator 16, an auxiliary conveying pipeline 17, an auxiliary air supplementing valve 18 and a power-assisted ash conveying pipe 19.
The specific implementation mode is as follows:
the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts all belong to the protection scope of the present invention.
As shown in fig. 1, the present embodiment provides a pneumatic ash conveying system for a single furnace in a thermal power plant, which includes an economizer ash conveying unit 1, an electrostatic precipitator ash conveying unit 2, and a bag-type dust collector ash conveying unit 3; the economizer ash conveying unit 1 comprises an economizer ash conveying pipe 1.1 and three economizer pneumatic dome valves 1.2 connected in series to the economizer ash conveying pipe 1.1; the air inlet of a first economizer pneumatic dome valve 1.2 is communicated with a compressed air pipeline 4 along the material conveying direction, the top feeding port of the economizer pneumatic dome valve 1.2 is communicated with an economizer ash hopper 1.3 through a discharging pipe, and the tail end of an economizer ash conveying pipe 1.1 is communicated with a first coarse ash warehouse 5; under the action of compressed air fed by a compressed air pipeline 4, coarse ash falling from an economizer ash hopper 1.3 is conveyed into a first coarse ash storage 5 along an economizer ash conveying pipe 1.1 through an economizer pneumatic dome valve 1.2.
An auxiliary conveying pipeline 17 is communicated with the compressed air pipeline 4 on the economizer ash conveying pipe 1.1 at the discharge port of each economizer pneumatic dome valve 1.2, and an auxiliary air replenishing valve 1811 is installed on the auxiliary conveying pipeline 17; compressed air is fed through the auxiliary conveying pipeline 17, so that the coarse ash in the ash conveying pipe 1.1 of the economizer can be effectively conveyed, the efficiency is improved, and the blockage is avoided; a dredging pipe 14 is communicated between the economizer ash conveying pipe 1.1 adjacent to the first coarse ash silo 5 and the compressed air pipeline 4, a dredging valve 15 is installed on the dredging pipe 14, and the conveying efficiency of the economizer ash conveying pipe 1.1 on coarse ash is further improved by introducing compressed air into the dredging pipe 14.
The electrostatic dust collector ash conveying unit 2 comprises an electrostatic dust collector ash conveying pipe 2.1 and four electrostatic dust collector pneumatic dome valves 2.2 which are connected in series with the electrostatic dust collector ash conveying pipe 2.1; the air inlet of a first electrostatic dust collector pneumatic dome valve 2.2 is communicated with a compressed air pipeline 4 along the material conveying direction, the top feeding port of the electrostatic dust collector pneumatic dome valve 2.2 is communicated with an electrostatic dust collector ash hopper 2.3, and the tail end of an electrostatic dust collector ash conveying pipe 2.1 is communicated with a second coarse ash storehouse 6; under the action of compressed air, ash falling from an ash hopper 2.3 of the electrostatic dust collector is conveyed into a second coarse ash storehouse 6 along an ash conveying pipe 2.1 of the electrostatic dust collector through a pneumatic dome valve 2.2 of the electrostatic dust collector; the ash conveying pipe 2.1 of the electrostatic dust collector is communicated with the compressed air pipeline 4 to form a power-assisted ash conveying pipe 19, compressed air can be introduced into the ash conveying pipe 2.1 of the electrostatic dust collector from the compressed air pipeline 4 through the power-assisted ash conveying pipe 19, the ash conveying efficiency is effectively improved, and blockage is avoided.
A connecting pipe 8 is communicated between the economizer ash conveying pipe 1.1 and the electrostatic precipitator ash conveying pipe 2.1, a three-way switching valve 9 is installed at the joint of the connecting pipe 8 and the economizer ash conveying pipe 1.1, and the switching valve 9 is also installed at the tail end of the connecting pipe 8; at the initial starting stage of normal operation of the system, the phenomenon of unstable operation exists, at the moment, the connection pipe 8 is isolated from the system through the two switching valves 9, namely, dust does not pass through the connection pipe 8, the coarse ash falling from the ash bucket 1.3 of the coal economizer is conveyed into the first coarse ash warehouse 5 along the ash conveying pipe 1.1 of the coal economizer, the ash falling from the ash bucket 2.3 of the electrostatic dust collector is conveyed into the second coarse ash warehouse 6 along the ash conveying pipe 2.1 of the electrostatic dust collector, so that the short-time independent conveying is realized, the ash conveying pipe 2.1 of the electrostatic dust collector is prevented from being blocked, and the normal operation of the electrostatic dust collector is ensured; when the system runs stably, the switching valve 9 at the starting end of the connecting pipe 8 is controlled, the ash conveying pipe 1.1 of the coal economizer at the rear section is cut off, the time for independently conveying coarse ash by the ash conveying pipe 1.1 of the coal economizer is reduced, the switching valve 9 at the tail end of the connecting pipe 8 is opened, and the coarse ash falling from the ash hopper 1.3 of the coal economizer is mixed and conveyed with the fine ash in the ash conveying pipe 2.1 of the electrostatic dust collector along the connecting pipe 8, so that the abrasion of the ash conveying pipe 2.1 of the electrostatic dust collector can be reduced, the abrasion of the ash conveying pipe 1.1 of the coal economizer can be slowed down, the service life of the whole system is prolonged, and the maintenance cost is reduced; and when the ash conveying unit 2 of the electrostatic dust collector is abnormal in operation, the ash conveying unit 1 of the coal economizer can independently operate by controlling the switching valve 9, and the coarse ash in the ash hopper 1.3 of the coal economizer can be ensured to continuously and normally operate through the ash conveying pipe 1.1 of the coal economizer.
An ash conveying and air supplementing pipeline 10 is communicated between the connecting pipe 8 and the compressed air pipeline 4, and an air supplementing valve 11 is arranged on the ash conveying and air supplementing pipeline 10; what carry in the connecting pipe 8 is the great coarse ash of granularity, blocks up easily, introduces compressed air through defeated grey tonifying qi pipeline 10 and further sweeps the transport to the coarse ash in the connecting pipe 8, effectively avoids blockking up.
The bag-type dust collector dust conveying unit 3 comprises a bag-type dust conveying pipe 3.1 and four bag-type pneumatic dome valves 3.2 connected in series with the bag-type dust conveying pipe 3.1; an air inlet of a first bag pneumatic dome valve 3.2 is communicated with a compressed air pipeline 4 along the material conveying direction, a material inlet at the top of the bag pneumatic dome valve 3.2 is communicated with a bag dust collector ash hopper 3.3, and the tail end of a bag ash conveying pipe 3.1 is communicated with a fine ash warehouse 7; the granularity of the ash discharged from the ash bucket 3.3 of the bag-type dust collector is finest, and the fine ash falling from the ash bucket 3.3 of the bag-type dust collector is conveyed into a fine ash storage 7 along a bag ash conveying pipe 3.1 through a bag pneumatic dome valve 3.2 under the action of compressed air fed by a compressed air pipeline 4; the cloth bag ash conveying pipe 3.1 is communicated with the compressed air pipeline 4 to form a power-assisted ash conveying pipe 19, and compressed air introduced through the power-assisted ash conveying pipe 19 is conveyed into the cloth bag ash conveying pipe 3.1, so that the ash conveying efficiency is further improved.
A dredging return pipe 12 is communicated with the coal economizer ash conveying pipe 1.1 at the discharge port of the last coal economizer pneumatic dome valve 1.2 and the electrostatic dust collector ash conveying pipe 2.1 at the discharge port of the last electrostatic dust collector pneumatic dome valve 2.2 along the material conveying direction, the discharge ports of the two dredging return pipes 12 correspondingly extend into the coal economizer ash hopper 1.3 and the electrostatic dust collector ash hopper 2.3, and a blocking discharge valve 13 is arranged on the dredging return pipe 12; the dust amount at the discharge outlet of the last pneumatic dome valve 2.2 of the electrostatic precipitator and the discharge outlet of the last pneumatic dome valve 1.2 of the economizer is large, the dust is easy to block, compressed air is introduced from the dredging return pipe 12 by opening the blocking discharge valve 13, and under the action of negative pressure in the economizer and the electrostatic precipitator, part of the blocked dust can return to the corresponding dust hopper along the dredging return pipe 12, so that an effective dredging effect is achieved.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. The single furnace gas power ash conveying system of the thermal power plant comprises an economizer ash conveying unit, an electrostatic dust collector ash conveying unit and a bag-type dust collector ash conveying unit;
the economizer ash conveying unit comprises an economizer ash conveying pipe and a plurality of economizer pneumatic dome valves connected in series on the economizer ash conveying pipe; the air inlet of the first economizer pneumatic dome valve is communicated with a compressed air pipeline along the material conveying direction, the top feeding port of the economizer pneumatic dome valve is communicated with an economizer ash hopper through a discharging pipe, and the tail end of the economizer ash conveying pipe is communicated with a first coarse ash warehouse;
the electrostatic dust collector ash conveying unit comprises an electrostatic dust collector ash conveying pipe and a plurality of electrostatic dust collector pneumatic dome valves which are connected in series on the electrostatic dust collector ash conveying pipe; the air inlet of the first pneumatic dome valve of the electrostatic dust collector is communicated with the compressed air pipeline along the material conveying direction, the top feeding port of the pneumatic dome valve of the electrostatic dust collector is communicated with an ash hopper of the electrostatic dust collector, and the tail end of the ash conveying pipe of the electrostatic dust collector is communicated with the second coarse ash warehouse;
the bag-type dust collector dust conveying unit comprises a bag-type dust conveying pipe and a plurality of bag-type pneumatic dome valves connected in series on the bag-type dust conveying pipe; the air inlet of the first cloth bag pneumatic dome valve in the material conveying direction is communicated with the compressed air pipeline, the top feeding port of the cloth bag pneumatic dome valve is communicated with a cloth bag dust collector ash hopper, and the tail end of the cloth bag ash conveying pipe is communicated with a fine ash warehouse;
the electrostatic dust collector is characterized in that a connecting pipe is communicated between the economizer ash conveying pipe and the electrostatic dust collector ash conveying pipe, and a switching valve is respectively arranged at the joint of the connecting pipe and the economizer ash conveying pipe and at the tail end of the connecting pipe; an ash conveying and air supplementing pipeline is communicated between the connecting pipe and the compressed air pipeline, and an air supplementing valve is installed on the ash conveying and air supplementing pipeline.
2. The thermal power plant single-furnace hydraulic ash conveying system as claimed in claim 1, wherein a dredging return pipe is communicated with the coal economizer ash conveying pipe at the discharge port of the last coal economizer pneumatic dome valve and the electrostatic dust collector ash conveying pipe at the discharge port of the last electrostatic dust collector pneumatic dome valve in the material conveying direction, discharge ports of the two dredging return pipes correspondingly extend into the coal economizer ash hopper and the electrostatic dust collector ash hopper, and a blocking discharge valve is installed on the dredging return pipe.
3. The thermal power plant single-furnace hydraulic ash conveying system as claimed in claim 1, wherein a dredging pipe is communicated between the economizer ash conveying pipe adjacent to the first coarse ash silo and the compressed air pipeline, and a dredging valve is installed on the dredging pipe.
4. The thermal power plant single furnace gas-power ash conveying system as claimed in claim 1, wherein sleeve compensators are installed on the economizer ash conveying pipe at the inlet of the economizer pneumatic dome valve, the electrostatic precipitator ash conveying pipe at the inlet of the electrostatic precipitator pneumatic dome valve, and the cloth bag ash conveying pipe at the inlet of the cloth bag pneumatic dome valve.
5. The thermal power plant single-furnace hydraulic ash conveying system as claimed in claim 1, wherein an auxiliary conveying pipeline is communicated with the compressed air pipeline on the economizer ash conveying pipe at the discharge port of each economizer pneumatic dome valve, and an auxiliary air replenishing valve is installed on the auxiliary conveying pipeline.
6. The thermal power plant single furnace gas power ash conveying system of claim 1, wherein an assisting ash conveying pipe is respectively communicated with the compressed air pipeline on the electrostatic dust collector ash conveying pipe and the cloth bag ash conveying pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222961998.4U CN218538492U (en) | 2022-11-07 | 2022-11-07 | Thermal power plant single furnace gas power ash conveying system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222961998.4U CN218538492U (en) | 2022-11-07 | 2022-11-07 | Thermal power plant single furnace gas power ash conveying system |
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| Publication Number | Publication Date |
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| CN218538492U true CN218538492U (en) | 2023-02-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222961998.4U Active CN218538492U (en) | 2022-11-07 | 2022-11-07 | Thermal power plant single furnace gas power ash conveying system |
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| CN (1) | CN218538492U (en) |
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- 2022-11-07 CN CN202222961998.4U patent/CN218538492U/en active Active
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