CN213453687U

CN213453687U - Device for reducing air leakage of boiler bottom dry slag discharge

Info

Publication number: CN213453687U
Application number: CN202021393094.0U
Authority: CN
Inventors: 王飞; 来强; 杜小军; 刘伟
Original assignee: Weihe Thermal Power Plant Of Datang Shaanxi Power Generation Co ltd; Datang Shaanxi Power Generation Co Ltd
Current assignee: Weihe Thermal Power Plant Of Datang Shaanxi Power Generation Co ltd; Datang Shaanxi Power Generation Co Ltd
Priority date: 2020-07-15
Filing date: 2020-07-15
Publication date: 2021-06-15
Anticipated expiration: 2030-07-15

Abstract

The utility model provides a reduce device that dry sediment leaks out at boiler bottom, including the boiler, arrange the dry sediment machine of boiler bottom in, arrange the unloading pipe between boiler and the dry sediment machine in, set up exhaust column, air supply door and the temperature monitor of setting on dry sediment machine in the unloading pipe one side, arrange the sediment storehouse of dry sediment machine tail end bottom in, be connected with cyclone on the exhaust column, cyclone separates the gas of suction back slag charge and carries to the sediment storehouse through sending the slag pipe, and gas passes through hot-blast main and secondary bellows and connects, secondary bellows passes through air supply pipe and boiler connection, dry sediment machine is including straight section and ascending section, straight section sets up in unloading pipe bottom portion, the tail end setting of ascending section is in the top in the sediment storehouse, the air supply door evenly sets up the both sides at straight section and the ascending section of dry sediment machine. The utility model provides a stove bottom and hot sediment carry out the problem that the cold air after exchanging leaks out, improve waste heat recovery and utilize, reduce the wasting of resources.

Description

Device for reducing air leakage of boiler bottom dry slag discharge

Technical Field

The utility model belongs to the technical field of boiler stove bottom air leakage control, concretely relates to reduce device that dry slag discharging leaks out at boiler stove bottom.

Background

The dry-type slag remover is well paid attention to the power industry in terms of energy conservation, water conservation, environmental protection and comprehensive benefits, and currently, hundreds of units are put into operation. Working process of the dry-type slag remover: the high-temperature slag falls onto a conveying belt of the slag extractor through a slag discharging door at the bottom of the furnace, the negative pressure of the furnace hearth is utilized, the furnace slag is cooled by sucking ambient air, cold air absorbs the physical sensible heat of hot furnace slag and the heat released by combustion of slag combustible and enters the furnace hearth, and the slag extractor continuously operates under the high-temperature condition.

However, the dry slag remover may increase air leakage of the boiler body, especially when coal which is easy to coke is used, the cold air door of the slag remover must be opened to increase the cold air quantity when slag or coke blocks are sufficiently cooled, and the increased cold air enters the boiler system in the form of air leakage for the boiler, so that the reference temperature of the boiler system is reduced, the central temperature of flame in the boiler and the temperature of exhaust smoke are increased, the heat loss of the exhaust smoke is increased, and the safety and the economical efficiency of the unit operation are influenced.

Disclosure of Invention

The utility model provides a device for reducing dry slag discharging and air leakage at the bottom of a boiler, which solves the problem of air leakage of cold air after exchanging the bottom of the boiler and hot slag and improves the waste heat recovery

The technical scheme of the utility model is that: the utility model provides a reduce device that dry sediment of boiler stove bottom leaked air, includes the boiler, arranges the dry sediment machine of boiler bottom in, arranges the unloading pipe between boiler and the dry sediment machine in, sets up exhaust pipe, blast gate and the temperature monitor on dry sediment machine, the sediment storehouse of dry sediment machine tail end bottom in of setting in of unloading pipe one side, be connected with cyclone on the exhaust pipe, cyclone separates the gas of suction back slag charge and carries to the sediment storehouse through sending the slag pipe, and gas passes through hot-blast main and secondary bellows and connects, secondary bellows passes through the blast pipe and is connected with the boiler, dry sediment machine includes straight section and ascending section, straight section sets up in unloading pipe bottom, the tail end setting of ascending section is in the top in sediment storehouse, the blast gate evenly sets up the both sides at straight section and the ascending section of dry sediment machine.

The scheme is further that a water pipe is arranged above the straight section of the slag drying machine and comprises a water inlet pipe, a water outlet pipe and a coiled pipe, the water inlet pipe is connected with the cold water tank, the water outlet pipe is connected with the hot water tank, and the coiled pipe is arranged above the slag drying machine in parallel.

The temperature monitors comprise a first temperature monitor and a second temperature monitor, the first temperature monitor is arranged at the rear end of the straight section of the slag drying machine, and the second temperature monitor is arranged at the rear end of the rising section of the slag drying machine.

Further, the first temperature monitor and the second temperature monitor are both infrared temperature monitors.

The scheme is further that a pressure monitor is further arranged on the slag drying machine and is arranged at the air supply door.

The utility model has the advantages that: the utility model discloses a set up exhaust column, set up air supply door, temperature monitor, open quantity through control air supply door and regulate and control the air supply volume, realize the effective reduction of slag charge temperature, avoid the high temperature to take place unsafe accident, the exhaust column carries out the hot-blast suction of heat exchange back with hot sediment with the stove bottom and comes out and carry out the reutilization, has not only reduced the stove bottom air leakage volume, has still reduced the use of overgrate air, resources are saved reaches the purpose that influences boiler combustion and reduces unit exhaust gas temperature; and the waste heat of the slag materials is further recycled by arranging the water pipe, so that the resource waste is reduced.

Drawings

FIG. 1 is a schematic structural view of a device for reducing air leakage of dry slag removal at the bottom of a boiler according to the present invention;

FIG. 2 is a schematic view of the water pipe structure of the device for reducing the dry slag discharge and air leakage at the bottom of the boiler of the present invention;

wherein: 1. the system comprises a boiler, 2, a feeding pipe, 3, an exhaust pipe, 4, a cyclone separator, 5, a hot air pipe, 6, a secondary air box, 7, an air supply pipe, 8, a slag supply pipe, 9, a slag drying machine, 10, an air supply door, 11, a first temperature monitor, 12, a second temperature monitor, 13, a slag bin, 14, a hot water tank, 15, a cold water tank, 16, a water pipe, 16-1, a water inlet pipe, 16-2, a coiled pipe, 16-3 and a water outlet pipe.

Detailed Description

The present invention will now be described more fully hereinafter with reference to the accompanying drawings, in which a person skilled in the art can, without any creative effort, fully implement the present invention.

The utility model discloses a concrete implementation mode is: as shown in fig. 1-2, a device for reducing dry slag discharge and air leakage at the bottom of a boiler comprises a boiler 1, a slag drying machine 9 arranged at the bottom of the boiler 1, a blanking pipe 2 arranged between the boiler 1 and the slag drying machine 9, an air exhaust pipe 3 arranged at one side of the blanking pipe 2, an air supply door 10 and a temperature monitor arranged on the slag drying machine 9, and a slag bin 13 arranged at the bottom of the tail end of the slag drying machine 9, wherein a cyclone separator 4 is connected to the air exhaust pipe 3, the cyclone separator 4 conveys slag materials after separating sucked gas to the slag bin 13 through a slag conveying pipe 8, the gas is connected with a secondary air box 6 through a hot air pipe 5, the secondary air box 6 is connected with the boiler 1 through an air supply pipe 7, the recovered hot air is secondarily utilized, the air leakage at the bottom of the boiler is reduced, the use of secondary air is also reduced, the energy is saved, the power plant efficiency is improved, the slag drying machine 9 comprises a, the straight section is arranged at the bottom of the blanking pipe 2, the tail end of the ascending section is arranged above the slag bin 13, and the air supply doors 10 are uniformly arranged at two sides of the straight section and the ascending section of the slag drying machine 9.

The utility model discloses further, the top of the straight section of dry sediment machine 9 is equipped with water pipe 16, water pipe 16 includes inlet tube 16-1, outlet pipe 16-3 and coiled pipe 16-2, inlet tube 16-1 and cold water storage cistern 15 are connected, outlet pipe 16-3 and hot-water tank 14 are connected, coiled pipe 16-2 parallel arrangement increases heating area in the top of dry sediment machine 9, utilizes the waste heat of the slag charge of dry sediment machine 9 upper transport to heat, make full use of the resource, water after the heating can do other usefulness, and hot-water tank 14 and cold water storage cistern 15 are along high setting, and cold water storage cistern 15 sets up in the top, makes things convenient for cold water to flow out under the action of gravity.

The utility model discloses further, temperature monitor includes first temperature monitor 11 and second temperature monitor 12, first temperature monitor 11 sets up the rear end at the straight section of dry sediment machine 9, second temperature monitor 12 sets up the rear end at the rising section of dry sediment machine 9, monitors the slag charge temperature of dry sediment machine different positions respectively, and when the slag charge temperature was too high not conform to the regulation, increase the supply air door 10 quantity of opening, increase the supply air volume and reduce the slag charge temperature, influence 1 burning of boiler simultaneously and reduce exhaust gas temperature, and the quantity is opened to reducible supply air door 10 when the slag charge temperature is less than the requirement temperature, and supply air door 10 is electronic supply air door.

Further, the first temperature monitor 11 and the second temperature monitor 12 are both infrared temperature monitors.

The utility model discloses further, still be equipped with pressure monitor on the dry sediment machine 9, pressure monitor sets up in air supply door 10 department, monitors the pressure of air supply, and the pressure adjustment with each air supply door 10 department as far as possible is unanimous.

While the preferred embodiments of the present invention have been described, it is to be understood that the invention is not limited to the precise embodiments described, and that equipment and structures not described in detail are understood to be practiced as commonly known in the art; any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention will still fall within the protection scope of the technical solution of the present invention by those skilled in the art without departing from the technical solution of the present invention.

Claims

1. The utility model provides a reduce device that dry sediment of boiler stove bottom leaked air which characterized in that, includes the boiler, arranges the dry sediment machine of boiler bottom in, arranges the unloading pipe between boiler and the dry sediment machine in, sets up exhaust column, air supply door and the temperature monitor on dry sediment machine in, arranges the sediment storehouse of dry sediment machine tail end bottom in, be connected with cyclone on the exhaust column, cyclone separates the gas of suction back slag charge and carries to the sediment storehouse through sending the slag pipe, and gas passes through hot-blast main and secondary bellows and connects, secondary bellows passes through the air supply pipe and is connected with the boiler, dry sediment machine includes straight section and ascending section, straight section sets up in unloading pipe bottom, the tail end setting of ascending section is in the top in sediment storehouse, the air supply door evenly sets up the both sides at straight section and the ascending section of dry sediment machine.

2. The device for reducing the dry slag discharge and air leakage at the bottom of a boiler as claimed in claim 1, wherein a water pipe is arranged above the straight section of the slag drying machine, the water pipe comprises a water inlet pipe, a water outlet pipe and a coiled pipe, the water inlet pipe is connected with the cold water tank, the water outlet pipe is connected with the hot water tank, and the coiled pipe is arranged above the slag drying machine in parallel.

3. The apparatus of claim 2, wherein the temperature monitors comprise a first temperature monitor and a second temperature monitor, the first temperature monitor is arranged at the rear end of the straight section of the dry slag machine, and the second temperature monitor is arranged at the rear end of the rising section of the dry slag machine.

4. The apparatus of claim 3, wherein the first temperature monitor and the second temperature monitor are infrared temperature monitors.

5. The device for reducing the dry slag leakage at the bottom of a boiler according to claim 4, wherein a pressure monitor is further arranged on the slag drying machine, and the pressure monitor is arranged at the air supply door.