CN201459172U - A pneumatic ash conveying device for blast furnace gas bag dust removal - Google Patents

Abstract

The utility model relates to a pneumatic ash conveying device for blast furnace gas bag dust removal. It comprises a dust remover (5) with a rough gas pipeline (4) and a clean gas pipeline (3), an ash conveying gas pipe (9) connected with the dust remover (5), and a dust remover (5) and ash conveying gas pipe (9) The ash unloading valve (6) provided on the connected pipeline is characterized in that: a fluidized valve with a fluidized gas pipe (8) is also provided on the pipeline connected between the dust collector (5) and the ash conveying gas pipe (9). device (7). By adopting the utility model, the dust discharged from the dust collector is evenly inflated and fluidized by the gas sent in by the fluidizing gas pipe in the fluidizer, so that it can be transported under a stable pressure state, and the ash conveying pipeline will not be blocked again.

Description

A pneumatic ash conveying device for blast furnace gas bag dust removal

technical field

The utility model relates to a pneumatic ash conveying device for blast furnace gas bag dust removal.

Background technique

In the existing pneumatic ash conveying device for blast furnace gas bag dust removal, see Figure 1, it sends the ash in the dust collector in the device into the ash conveying pipeline by utilizing the pressure in the dust remover and the gravity of the dust itself. The bell-shaped ash unloading valve and reducer pipe feed and drain the ash. Due to the different properties of the mixture of dust and ash gas, as well as the change of the flow and conveying conditions of the mixture in the ash conveying pipe, the flow form of the mixture is more complicated and diversified, and the pipe is often blocked during the ash conveying, and the blocked position is generally the vertical direction of the ash. At the small pipe diameter after the variable diameter pipe on the pipeline, the way to clear the blockage after the blockage occurs is to open the stop valve and let in nitrogen to clear the ash of the blocked pipe. However, this method is often unsuccessful and is replaced by manual removal of the pipe. It not only affects the normal operation of the ash conveying system, but also increases the maintenance workload, which is one of the outstanding problems in the operation of the pneumatic ash conveying system.

Utility model content:

The utility model provides a pneumatic ash conveying device which can smoothly transport the dust from the dust collector without blockage, aiming at the problem of pipe blockage often occurring in the existing blast furnace gas bag dust removal pneumatic ash conveying device.

The purpose of this utility model is achieved in this way: a pneumatic ash conveying device for bag dust removal of blast furnace gas, which includes a dust collector with a crude gas pipeline and a clean gas pipeline, and an ash conveying gas pipe connected with the dust collector. The ash unloading valve provided on the pipeline connecting the dust remover and the ash conveying pipe is characterized in that a fluidizer with a fluidizing air pipe is also arranged on the pipe connecting the dust remover and the ash conveying pipe. Air is supplied to the fluidizer through the fluidizing air pipe to fluidize the dust in it.

Two ash discharge valves are arranged on the pipeline connecting the dust remover with the ash conveying gas pipe, and the fluidizer is arranged between the two ash discharge valves.

Since the utility model adds a fluidizer for fluidizing the dust, the dust discharged from the dust collector is uniformly inflated and fluidized by the gas sent in by the fluidizing air pipe in the fluidizer, thereby realizing the stable pressure of the dust. Under the condition of transportation, the ash conveying air pipe will no longer be blocked. In a word, the utility model has the advantages of simple structure, convenient installation, small system maintenance workload, low maintenance cost, high reliability and good operability.

Description of drawings

Fig. 1 is the structural representation of existing pneumatic ash conveying device;

Fig. 2 is a schematic structural view of an embodiment of the utility model.

In the figure: 1-ash tank; 2-ash discharge device; 3-clean gas pipeline; 4-coarse gas pipeline; 5-dust collector; 6-ash discharge valve; 7-fluidizer; 8-fluidized gas pipe; 9 -Ash conveying air pipe; 10-bell-shaped ash unloading valve; 11-reducing pipe; 12-nitrogen.

Detailed ways

Below in conjunction with accompanying drawing and embodiment the utility model is further described:

Embodiment: a kind of pneumatic ash conveying device that is used for bag dust removal of blast furnace gas, it comprises the dust remover 5 that has crude gas pipeline 4 and clean gas pipeline 3, and the ash conveying gas pipe 9 that is connected with dust remover 5, in the dust remover 5. The ash unloading valve 6 provided on the pipeline connected with the ash conveying pipe 9 is characterized in that a fluidizer 7 with a fluidized gas pipe 8 is also arranged on the pipeline connected between the dust collector 5 and the ash conveying pipe 9. The gasification pipe 8 supplies gas to the fluidizer to fluidize the dust in the pipeline.

It can also be seen from the figure that two ash discharge valves 6 are arranged on the pipeline connected between the dust collector 5 and the ash conveying air pipe 9 , and the fluidizer 7 is arranged between the two ash discharge valves 6 .

When working, use the pressure of the BFG itself in the dust collector 5 to unload the dust, the dust enters the fluidizer 7, and the compressed gas enters the fluidizer 7 through the fluidizing gas pipe 8 so that the dust from the dust collector can evenly fill the air flow , and then under the action of the gas from the ash conveying pipe 9, the stable pressure state is conveyed.

Claims (2)

1. pneumatic ash conveying plant that is used for blast furnace gas cloth bag dedusting, it comprises the fly-ash separator (5) that has raw gas pipeline (4) and purified gas pipeline (3), the defeated grey tracheae (9) that is connected with fly-ash separator (5), the unloading valve (6) that is provided with on fly-ash separator (5) and pipeline that defeated grey tracheae (9) is communicated with is characterized in that: fly-ash separator (5) with fail the pipeline that grey tracheae (9) is communicated with on also be provided with the fluidisation device (7) of being with fluidisation tracheae (8).

2. the pneumatic ash conveying plant that is used for blast furnace gas cloth bag dedusting as claimed in claim 1, it is characterized in that: fly-ash separator (5) is provided with two unloading valves (6) with the pipeline that defeated grey tracheae (9) is communicated with, and described fluidisation device (7) is arranged between two unloading valves (6).

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