CN215032182U - Mixing ash removal system of waste power plant flying dust - Google Patents

Abstract

In order to overcome the prior art problem, the utility model provides a mixing ash removal system of waste power factory flying dust, collect pipeline including the ash of raising, the ash of raising is collected pipeline and is connected between the air outlet of flying dust mixing roll and the inlet scoop of bucket elevator, utilizes the interior negative pressure of bucket elevator (scraper) to induced draft from the mixing roll air outlet, builds the mixing roll negative pressure environment, unloads the ash of mixing roll and sucks the flying dust of bucket elevator (scraper) in-process to return the flying dust to store the storehouse after concentrating. The utility model provides a technical scheme, make full use of ready-made corollary equipment need not to increase a large amount of equipment facilities, only needs to collect pipeline to the ash of raising and improves and can solve the prior art problem, saves the cost, and the ash removal is effectual.

Description

Mixing ash removal system of waste power plant flying dust

Technical Field

The utility model relates to a waste incineration power plant dust pelletizing system especially relates to a mixing ash handling system of waste power plant flying dust.

Background

In the daily operation of a waste incineration power plant, fly ash generated in the waste incineration process needs to be treated. In the documents of the technical Specification for controlling the fly ash pollution caused by burning the household garbage (HJ1134-2020), the concentration of particulate matters around the fly ash storage and treatment site is definitely specified not to exceed the limit value of the emission concentration in the air pollutant comprehensive emission standard, and measures for preventing the fly ash from flying and diffusing are required to be taken in the fly ash treatment process. The areas of fly ash and treated products thereof which are easy to generate dust, such as loading, unloading, transferring, adding and the like, are closed and provided with high-efficiency dust removal devices, and the particulate matters in the discharged waste gas do not exceed the discharge concentration limit value specified in the air pollutant comprehensive discharge standard. The dust collected by the dust removing device is returned to the fly ash storage facility for treatment. Therefore, the requirements on environmental protection are stricter at the present stage, and the improvement of the dust removal effect of the fly ash stabilization treatment is imperative.

The fly ash of a garbage power plant is generally conveyed to a fly ash storage bin through a scraper conveyor, a mixing roll is bound to be provided with a bucket elevator, a scraper and other matched equipment belonging to fly ash conveying and processing, and a draught fan exhausts air from a cloth bag air locker in the operation process, so that certain negative pressure exists in the whole ash conveying system equipment, and the fly ash is also an important measure for preventing the dust of the ash conveying system.

The link that produces the most raise dust in the fly ash stabilization process is unloading ash and stirring in the mixing roll, and the sealed dust collector of the mixing roll that commonly uses at present has two kinds, one is the sack cleaner, and one is the water film dust removal. The bag-type dust collector adopts a small fan to suck air from an air outlet of the mixing roll, then the air enters the bag to be filtered, the gas is directly discharged into the atmosphere, fly ash intercepted by the bag returns to the fly ash weighing hopper to be treated again, and the bag is extremely easy to wet and harden, so that the flow property of the bag is reduced, the negative pressure sealing effect is poor, and the maintenance workload is large. The water film dust removal adopts a fan to suck air from an air outlet of the mixing roll, introduces a water tank, cleans fly ash by water, directly discharges gas into the atmosphere, and recycles waste water for diluting chelating agent.

SUMMERY OF THE UTILITY MODEL

In order to overcome the prior art problem, the utility model provides a mixing ash removal system of waste power factory flying dust, collect pipeline including the ash of raising, the ash of raising is collected pipeline and is connected between the air outlet of flying dust mixing roll and the inlet scoop of bucket elevator, utilizes the interior negative pressure of bucket elevator (scraper) to induced draft from the mixing roll air outlet, builds the mixing roll negative pressure environment, unloads the ash of mixing roll and sucks the flying dust of bucket elevator (scraper) in-process to return the flying dust to store the storehouse after concentrating. The utility model provides a technical scheme, make full use of ready-made corollary equipment need not to increase a large amount of equipment facilities, only needs to collect pipeline to the ash of raising and improves and can solve the prior art problem, saves the cost, and the ash removal is effectual.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a mixing deashing system of waste power factory flying dust, characterized by collects pipeline including the ash of raising, the ash of raising is collected pipeline and is connected between the inlet scoop of the air outlet of flying dust mixing roll and bucket elevator.

The utility model discloses preferred scheme is, it is right still to set up air bubble jetting system the conveying pipeline is collected to the ash that raises and blows, according to the direction that compressed air flows, air bubble jetting system in proper order include compressed air access pipeline, compressed air buffer tank and connect in the compressed air buffer tank with a plurality of jetting branch pipes between the conveying pipeline are collected to the ash that raises to still set up manual control valve and solenoid electric valve respectively on each jetting branch pipe.

The utility model has the advantages that: the utility model provides a mixing deashing system of waste power factory flying dust, collects pipeline including the ash that lifts, the ash that lifts is collected pipeline and is connected between the air outlet of flying dust mixing roll and the inlet scoop of bucket elevator, utilizes the bucket elevator (scrape the trigger) interior negative pressure and induced drafts from the mixing roll air outlet, builds the mixing roll negative pressure environment, unloads the ash in-process with the mixing roll, and the dust of stirring in-process is concentrated and is inhaled bucket elevator (scrape the trigger) and return the flying dust and store the storehouse. Through the utility model discloses can solve the flying dust problem that the waste incineration flying dust unloaded at the mixing roll and produced with the mixing in-process of stirring, concentrate the flying dust of collecting and return the fly ash storehouse, stop the harmful gas inorganization of carrying the flying dust and discharge, improve flying dust stabilization workshop environment, reduce secondary pollution, reduce the equipment construction of waste incineration plant and drop into, alleviate the plant maintenance volume.

Description of the drawings:

fig. 1 is a schematic structural diagram of an embodiment of the prior art.

Fig. 2 is a schematic structural diagram of a first embodiment of the present invention.

Fig. 3 is a schematic structural diagram of a first embodiment of the present invention.

In the figure, the position of the upper end of the main shaft,

1. the mixer comprises a mixer, 1.1 an air outlet of the mixer, 1.21 an ash inlet, 1.22 an ash discharge port after mixing and 1.3 a medicament pipeline;

2. ash lifting and collecting conveying pipes, 2.11, 2.12 and 2.13 blowing branch pipes, 2.11A manual control valves, 2.11B electromagnetic control valves and 2.2 compressed air buffer tanks;

3. a bucket elevator, a 3.1 fly ash conveying pipeline and a 3.2 air suction opening;

4. a bag-type dust collector, a 4.1 ash inlet, a 4.2 ash outlet and a 4.3 compressed air inlet;

5.1, 5.2 ash conveyors;

6, a fly ash storage bin;

7 weighing and metering bin;

8 compressed air source, 8.1, 8.2 compressed air branch pipe.

Detailed Description

Fig. 1 is a schematic structural diagram of an embodiment of the prior art. The figure shows that in the prior art, the fly ash of a garbage power plant enters a bucket elevator 3 through a fly ash conveying pipeline 3.1, is lifted by the bucket elevator 3 and then is sequentially conveyed to an ash conveyor 5.1, a fly ash storage bin 6 and a weighing and metering bin 7, and then enters a mixing roll 1, meanwhile, a medicament is added into the mixing roll 1 through a medicament pipeline 1.3 to perform stabilizing mixing on the fly ash, and finally, the fly ash is discharged from an ash discharge port 1.22 after mixing, and is landfilled after being packed.

In the process of conveying and stabilizing the fly ash, the link generating the most raised dust is the ash discharge and stirring of the mixing mill, and the figure shows that the prior art adopts a bag-type dust collector 4 to treat the raised dust. The flying dust collected by the air outlet 1.1 of the mixing roll is conveyed to the dust inlet 4.1 of the bag-type dust collector 4 by the flying dust collecting conveying pipe 2, the flying dust is collected by the bag-type dust collector 4, and the flying dust falls into the weighing and metering bin 7 by the dust outlet 4.2 of the bag-type dust collector 4 after being collected. In actual operation, the cloth bag of the cloth bag dust collector 4 is very easy to be wet and hardened, so that the circulation of the cloth bag is reduced, the negative pressure sealing effect is poor, and the maintenance workload is large. In the prior art, compressed air is connected to a compressed air inlet 4.3 of a bag-type dust collector 4 through a compressed air branch pipeline 8.2, a valve is arranged on the pipeline, and the compressed air is discontinuously introduced into the bag-type dust collector 4 by closing or opening the valve so as to vibrate a bag, so that a plate is vibrated and scattered to clean and maintain the bag. In the daily operation process, the workload of such maintenance is large, and the operation cost is increased.

Fig. 2 is a schematic structural diagram of a first embodiment of the present invention. In the figure, the bag-type dust collector 4 and the related auxiliary equipment are removed, and the connection of the ash lifting collecting and conveying pipeline 2 is improved, and the ash lifting collecting and conveying pipeline 2 is connected between the air outlet 1.1 of the mixing mill 1 and the air suction opening 3.2 of the bucket elevator 3. The negative pressure in the bucket elevator 3 (scraper) is used for sucking air from the mixer air outlet 1.1, so that the negative pressure environment of the mixer 1 is created, and the raised dust generated in the processes of unloading and stirring of the mixer 1 is intensively sucked into the bucket elevator 3 (scraper) and finally returns to the fly ash storage bin 6. The utility model provides a technical scheme, near the ready-made supporting equipment in make full use of mixing roll 1 need not additionally to increase a large amount of equipment facilities, only needs to improve the connection of conveying pipeline 2 is collected to the ash of raising, can solve the prior art problem, saves the cost, and the work maintenance volume is low, and the ash removal is effectual.

Fig. 3 is a schematic structural diagram of a second embodiment of the present invention. Different from the first embodiment, in the figure, in order to ensure that the ash lifting collecting and conveying pipeline 2 is unblocked, an air cannon injection system is further arranged to inject the ash lifting collecting and conveying pipeline 2, the air cannon injection system sequentially comprises a compressed air branch pipeline 8.2, a compressed air buffer tank 2.2, injection branch pipelines 2.11, 2.12 and 2.13 connected between the compressed air buffer tank 2.2 and the ash lifting collecting and conveying pipeline 2 according to the flowing direction of compressed air, and a manual control valve 2.11A and an electromagnetic control valve 2.11B are further arranged on each injection branch pipeline respectively. Different sections of the ash lifting collecting and conveying pipeline 2 are subjected to intermittent blowing through a manual control valve 2.11A and an electromagnetic control valve 2.11B, so that the cleaning effect is achieved.

Claims (2)

1. The utility model provides a mixing deashing system of waste power factory flying dust, collects pipeline including the ash of raising, characterized by, the pipeline is collected to the ash of raising is connected between the inlet scoop of the air outlet of flying dust mixing roll and bucket elevator.

2. The mixing and ash removing system for the fly ash in the garbage power plant as claimed in claim 1, wherein an air cannon injection system is further provided to inject the ash collection and delivery pipeline, the air cannon injection system comprises a compressed air access pipeline, a compressed air buffer tank and a plurality of injection branch pipes connected between the compressed air buffer tank and the ash collection and delivery pipeline in sequence according to the flowing direction of compressed air, and each injection branch pipe is further provided with a manual control valve and an electromagnetic control valve.

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