A bottom ash extraction device for a coal-fired chain grate boiler

Abstract

This utility model provides a bottom ash suction device for a coal-fired chain grate boiler, including an ash pot. A bag filter is installed above the ash pot, and the top of the bag filter is connected to the inlet of a Roots blower via a pipeline. A discharge device is installed below the ash pot, and an ash hopper is installed below the discharge device. One side of the ash pot is connected to one end of a ash suction pipe, and the other end of the ash suction pipe is connected to a suction nozzle. An air mixing port is opened on the side of the suction nozzle, and an air mixing inlet pipe is provided on the air mixing port. This utility model has a strong blower suction power, which can easily suck up larger ash lumps. It consumes less energy and has low operating costs. The bag filter can thoroughly filter dust in the air, ensuring environmental hygiene. The ash suction pipe uses a transparent steel wire hose, which can prevent it from being squeezed out by negative pressure and allows the flow of ash inside the pipe to be seen. The air mixing port on the side of the suction nozzle ensures that some air is mixed in while sucking up ash, ensuring that the airflow carries the ash smoothly into the ash pot and preventing ash blockage in the ash suction pipe.

Description

Technical Field

[0001] This utility model belongs to the technical field of coal-fired boiler equipment, specifically relating to a bottom ash extraction device for a coal-fired chain grate boiler. Background Technology

[0002] In coal-fired chain grate boiler systems, it is necessary to regularly remove the slag that falls from the boiler chain. Currently, the main method is manual removal using shovels. Manual removal has the following drawbacks: firstly, it is labor-intensive, time-consuming, and incomplete; secondly, it generates a lot of fly ash and dust during the manual removal process, affecting the air environment. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a bottom ash extraction device for coal-fired chain grate boilers.

[0004] The technical solution of this utility model is implemented as follows: A bottom ash suction device for a coal-fired chain grate boiler includes a ash tank, a bag filter is provided above the ash tank, the top of the bag filter is connected to the inlet of a Roots blower through a pipeline, a discharge device is provided below the ash tank, a ash hopper is provided below the discharge device, one side of the ash tank is connected to one end of a ash suction pipe, the other end of the ash suction pipe is connected to a suction nozzle, one end of the suction nozzle is the boiler bottom ash inlet, an air mixing port is opened on the side of the suction nozzle, and an air mixing inlet pipe is provided on the air mixing port;

[0005] Preferably, a silencer is provided at the outlet of the fan;

[0006] Preferably, the slag suction pipe is a transparent steel wire hose.

[0007] The beneficial effects of this utility model are as follows: the Roots blower of this utility model has a strong suction force, which can easily suck up larger slag lumps, consumes less energy and has low operating costs; the bag filter can thoroughly filter dust in the air and ensure environmental hygiene; the slag suction pipe uses a transparent steel wire hose, which can not only prevent it from being sucked down by negative pressure, but also allow the flow of slag inside the pipe to be seen; an air mixing port is opened on the side of the suction nozzle to ensure that some air is mixed in while sucking slag, ensuring that the airflow carries the slag smoothly into the slag pot, preventing slag blockage in the slag suction pipe, and solving the problems of time-consuming and laborious manual cleaning of slag accumulation at the bottom of the furnace and excessive fly ash dust. Attached Figure Description

[0008] Figure 1 This is a schematic diagram of the structure of this utility model;

[0009] Figure 2 This is a schematic diagram of the structure of the air mixing pipe and the suction nozzle of this utility model.

[0010] Parts Description: 1. Fan, 2. Silencer, 3. Baghouse Dust Collector, 4. Slag Pot, 5. Unloader, 6. Slag Hopper, 7. Slag Suction Pipe, 8. Suction Nozzle, 9. Air Mixing Pipe, 10. Air Mixing Port. Detailed Implementation

[0011] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0012] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0013] See attached document Figure 1-2 A bottom ash suction device for a coal-fired chain grate boiler includes a ash hopper 4, a bag filter 3 above the ash hopper 4, the top of the bag filter 3 being connected to the inlet of a Roots blower 1 via a pipeline, a silencer 2 being installed at the outlet of the blower 1, a discharge device 5 being installed below the ash hopper 4, and a ash hopper 6 being installed below the discharge device 5. One side of the ash hopper 4 is connected to one end of a ash suction pipe 7, and the other end of the ash suction pipe 7 is connected to a suction nozzle 8. One end of the suction nozzle 8 is the boiler bottom ash inlet, and an air mixing port 10 is opened on the side of the suction nozzle 8. An air mixing pipe 9 is installed on the air mixing port 10. The ash suction pipe 7 is a transparent steel wire hose.

[0014] Blower 1 uses a Roots blower. Roots blowers have strong suction. Air protection is installed on both sides of the shaft seal end of the Roots blower to reduce wear. The negative pressure generated by the Roots blower draws the bottom ash of the coal-fired chain grate boiler into the suction nozzle 8. Together with the air mixed in by the air mixing pipe 9, it enters the ash hopper 4 through the ash suction pipe 7. The purpose of installing the air mixing pipe 9 on the suction nozzle 8 is to drive the ash flow with air and prevent ash blockage. The ash suction pipe 7 is a transparent steel wire hose, which can prevent it from being sucked down by the negative pressure and allows the flow of ash inside the pipe to be clearly seen. The bottom ash of the boiler entering the ash hopper 4 falls to the bottom of the ash hopper 4 by gravity. The ash is discharged into the ash hopper 6 by the unloader 5 and transported out. The air entering the ash hopper 4 is filtered by the bag filter dust collector 3 to remove fly ash dust before entering the blower 1. The air discharged by the blower 1 is silenced by the silencer 2 before being discharged into the atmosphere.

[0015] This utility model features a Roots blower with strong suction, capable of easily removing large slag chunks, low energy consumption, and low operating costs. The bag filter thoroughly filters dust from the air, ensuring environmental hygiene. The slag suction pipe uses a transparent steel wire hose, which prevents it from being collapsed by negative pressure and allows for observation of the slag flow inside the pipe. An air mixing port is opened on the side of the suction nozzle to ensure that some air is mixed in while suctioning slag, ensuring that the airflow smoothly carries the slag into the slag hopper and preventing slag blockage in the suction pipe. This solves the problems of time-consuming and labor-intensive manual cleaning of slag accumulation at the bottom of the furnace and excessive fly ash dust.

[0016] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope of the present utility model based on the technical solution and the inventive concept of the present utility model are covered within the protection scope of the present utility model.

Claims

1. A bottom ash suction device for a coal-fired chain grate boiler, comprising an ash pot (4), characterized in that... A bag filter (3) is provided above the slag pot (4). The top of the bag filter (3) is connected to the inlet of the Roots blower (1) through a pipeline. A discharge device (5) is provided below the slag pot (4). A slag hopper (6) is provided below the discharge device (5). One side of the slag pot (4) is connected to one end of the slag suction pipe (7). The other end of the slag suction pipe (7) is connected to the suction nozzle (8). One end of the suction nozzle (8) is the boiler bottom slag inlet. An air mixing port (10) is opened on the side of the suction nozzle (8). An air mixing pipe (9) is provided on the air mixing port (10).

2. The bottom ash extraction device for a coal-fired chain grate boiler as described in claim 1, characterized in that... A silencer (2) is provided at the outlet of the fan (1).

3. The bottom ash extraction device for a coal-fired chain grate boiler as described in claim 1, characterized in that... The slag suction pipe (7) is a transparent steel wire hose.

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