CN215557267U

CN215557267U - Filter device applied to high-pressure dense-phase pulverized coal pneumatic conveying system

Info

Publication number: CN215557267U
Application number: CN202121472885.7U
Authority: CN
Inventors: 李俊; 陈秋平; 曹立恒
Original assignee: China Petroleum and Chemical Corp; Sinopec Hubei Chemical Fertilizer Co
Current assignee: China Petroleum and Chemical Corp; Sinopec Hubei Chemical Fertilizer Co
Priority date: 2021-06-30
Filing date: 2021-06-30
Publication date: 2022-01-18
Anticipated expiration: 2031-06-30

Abstract

A filter device applied to a high-pressure dense-phase pulverized coal pneumatic conveying system comprises a reducer pipe arranged on a return line of the high-pressure dense-phase pneumatic conveying coal line, wherein the caliber of the reducer pipe is gradually increased from one end to the other end; the reducing pipe quantity be two, detachably is equipped with the filter between two reducing pipes, two reducing pipes have constituted the buggy passageway that middle big both ends are little. The utility model is not easy to block, eliminates the risk of on-line maintenance of the coal line discharge device, saves the cost and ensures the normal and stable circulation of the coal line.

Description

Filter device applied to high-pressure dense-phase pulverized coal pneumatic conveying system

Technical Field

The utility model belongs to the technical field of coal chemical industry, and particularly relates to a filtering device applied to a high-pressure dense-phase pulverized coal pneumatic conveying system.

Background

The high-pressure dense-phase pulverized coal pneumatic conveying system is commonly used in a boiler system, and the existing chinese patent documents, for example, a dry pulverized coal pressurized dense-phase conveying system disclosed in CN201120019514.3 and a pulverized coal high-pressure dense-phase conveying control system based on DCS disclosed in CN201420060133.3, introduce the high-pressure dense-phase pulverized coal pneumatic conveying system. In the chemical industry, when the gasification furnace is started, each coal charging line is provided with a circulating line. The coal powder returns to the coal powder bin through a circulation line before coal feeding for coal line circulation. And once the coal burner jumps during and after the start-up, the pulverized coal returns to the pulverized coal bin through the circulating line, and is switched back to the gasification furnace after the problem is eliminated. The high pressure coal line gets into ordinary pressure buggy storehouse through the circulation line and carries out the decompression through the discharging equipment on the coal circulation line, because the inside undergauge decompression effect of discharging equipment, easily blocks up discharging equipment when the buggy contains a small amount of impurity, influences the coal feeding, and has the pressure release difficulty, and the influence such as online maintenance risk height, maintenance time length are wasted time and energy.

SUMMERY OF THE UTILITY MODEL

In view of the technical problems in the background art, the filtering device applied to the high-pressure dense-phase pulverized coal pneumatic conveying system is not easy to block, eliminates the risk of on-line maintenance of the coal line discharging device, saves the cost and ensures the normal and stable circulation of the coal line.

In order to solve the technical problems, the utility model adopts the following technical scheme to realize:

a filter device applied to a high-pressure dense-phase pulverized coal pneumatic conveying system comprises a reducer pipe arranged on a return line of the high-pressure dense-phase pneumatic conveying coal line, wherein the caliber of the reducer pipe is gradually increased from one end to the other end; the reducing pipe quantity be two, detachably is equipped with the filter between two reducing pipes, two reducing pipes have constituted the buggy passageway that middle big both ends are little.

In the preferred scheme, flanges are arranged at two ends of the reducer pipe, the reducer pipe is connected with the high-pressure dense-phase pneumatic coal conveying line return pipeline through the flanges, the two reducer pipes are connected through the flanges, and the filter plate is clamped between the two reducer pipes.

In a preferable scheme, the edge of the filter plate is provided with a handle.

In the preferred scheme, the diameter of the filter plate is twice of the diameter of the pipeline of the high-pressure dense-phase pneumatic coal conveying line return line; the axis of the reducer pipe is horizontally arranged.

In a preferred scheme, the inner wall of the reducing pipe is a smooth surface.

In the preferred scheme, the flanges at the two ends of the reducer pipe are convex-concave surfaces or convex-surface flanges, and the side surfaces of the filter plate are matched with the convex-concave surfaces or the convex-surface flanges.

In a preferable scheme, the outer edge of the filter plate is provided with a metal winding pad.

This patent can reach following beneficial effect:

1. the device is horizontally arranged on a return line of the high-pressure dense-phase pneumatic coal conveying line, so that sundries can be conveniently deposited below the filtering device, and the sufficient flow area is ensured.

2. And two ends of the filtering device are connected by flanges, so that the filtering device is convenient to disassemble, inspect and clean sundries.

3. The sundries of the filter plate are filtered and sink to the lower part of the front end of the filter plate, so that the flowing property of the coal powder is not influenced.

4. The high-pressure inert gas carries the pulverized coal to enter from the inlet end of the filter device, the pulverized coal enters the rear pipeline through the holes of the filter element (filter plate), the part of a small amount of impurities (such as fibers and other parts cracked by equipment) in the pulverized coal, which is larger than the hole diameter, is intercepted, the part of the impurities, which is smaller than the hole diameter, passes through the rear pipeline and enters the discharge device, and the impurities are intercepted in the filter device because the diameter of the filter hole of the filter device is smaller than the pressure relief hole of the discharge device, so that the smoothness of the discharge device is ensured. The heavy part after the impurities are intercepted is accumulated at the lower part of the front end of the filter element, a small amount of fiber impurities block a few through flow holes, and the normal conveying of the pulverized coal is not influenced because the through flow area is large enough. The utility model does not need to be disassembled and inspected during the operation of the device, can ensure the long-period safe operation, and can be disassembled and inspected during the overhaul of the device.

Drawings

The utility model is further illustrated by the following examples in conjunction with the accompanying drawings:

FIG. 1 is a view of the installation position of the present invention;

FIG. 2 is a front view of the present invention;

fig. 3 is a front view of the filter plate of the present invention.

In the figure: the coal dust collecting device comprises a reducer pipe 1, a filter plate 2, a handle 3, a normal-pressure coal bunker 4, an intermediate coal bunker 5 and a high-pressure coal dust feeding tank 5; a represents a filtration device.

Detailed Description

A preferred scheme is as shown in fig. 1 to fig. 3, a filtering device applied to a high-pressure dense-phase pneumatic pulverized coal conveying system comprises a reducer 1 arranged on a return line of a high-pressure dense-phase pneumatic conveying coal line, wherein the caliber of the reducer 1 gradually increases from one end to the other end; the reducing pipe 1 quantity be two, detachably is equipped with filter 2 between two reducing pipe 1, two reducing pipe 1 have constituted the big little buggy passageway in middle of two.

Furthermore, the two ends of the reducer pipe 1 are both provided with flanges, the reducer pipe 1 is connected with the high-pressure dense-phase pneumatic coal conveying return line pipeline through the flanges, the two reducer pipes 1 are connected through the flanges, and the filter plate 2 is clamped between the two reducer pipes 1.

Further, the edge of the filter plate 2 is provided with a handle 3.

Furthermore, the diameter of the filter plate 2 is 3-5 times of the diameter of the high-pressure dense-phase pneumatic conveying coal line return line pipeline.

Further, the inner wall of the reducer pipe 1 is a smooth surface. The inner parts of the reducing parts of the inlet and the outlet of the filtering device are smooth, so that smooth pulverized coal conveying by high-pressure dense-phase pneumatic conveying is ensured. The front and rear pipelines of the filtering device are provided with supports or hangers, so that the stability of the pipelines is ensured.

Furthermore, the flanges at the two ends of the reducer pipe 1 are convex-concave surface flanges, and the side surface of the filter plate 2 is matched with the convex-concave surface flanges.

Further, the outer edge of the filter plate 2 is provided with a metal winding pad.

The working principle of the whole device is as follows:

the filter plate 2 is provided with a plurality of round holes, the aperture of which is slightly smaller than the pressure reducing holes on the return line discharging device, so that impurities are filtered and sunk into the lower part of the front end of the filter element. The flow area on the filter plate 2 is far larger than the area of a pressure reducing hole of the discharging device, so that the pressure can not be reduced in the filtering device, and the pressure and the flow speed and the flow of the original pipeline can be ensured. Enough flow area on the filter plate 2 ensures that the pipeline can be still ensured to be smooth when local holes on the filter plate 2 are blocked. Meanwhile, the sufficient flow area ensures that the requirement of long-period production can be met when partial impurities are deposited. And performing the same air tightness test according to the related requirements of the coal line after the filter device is installed or disassembled. The utility model has simple principle and less investment, eliminates the blockage of the discharge device after installation, saves the start-up cost and reduces the risk of online maintenance of the discharge device. The method has great significance for coal dust circulation before the start of the shell gasifier and coal dust return anti-blocking after the coal burner jumps, and has great popularization value in the aspects of ensuring safety, starting progress and saving cost.

The above-described embodiments are merely preferred embodiments of the present invention, and should not be construed as limiting the present invention, and the scope of the present invention is defined by the claims, and equivalents including technical features described in the claims. I.e., equivalent alterations and modifications within the scope hereof, are also intended to be within the scope of the utility model.

Claims

1. The utility model provides an apply to high pressure dense phase buggy pneumatic conveying system's filter equipment which characterized in that: the variable-diameter pipe (1) is arranged on a return line of a high-pressure dense-phase pneumatic coal conveying line, and the caliber of the variable-diameter pipe (1) is gradually increased from one end to the other end; the coal dust separator is characterized in that the number of the reducer pipes (1) is two, the filter plates (2) are detachably arranged between the two reducer pipes (1), and the two reducer pipes (1) form a coal dust channel with a large middle and two small ends.

2. The filter device for the high-pressure dense-phase pneumatic pulverized coal conveying system according to claim 1, wherein: the two ends of the reducer pipe (1) are respectively provided with a flange, the reducer pipe (1) is connected with a high-pressure dense-phase pneumatic coal conveying return line pipeline through a flange, the two reducer pipes (1) are connected through a flange, and the filter plate (2) is clamped between the two reducer pipes (1).

3. The filtering device applied to the high-pressure dense-phase pulverized coal pneumatic conveying system according to claim 1 or 2, which is characterized in that: the edge of the filter plate (2) is provided with a handle (3).

4. The filter device for the high pressure dense phase pneumatic conveying system of pulverized coal according to claim 3, wherein: the diameter of the filter plate (2) is 3-5 times of the diameter of the high-pressure dense-phase pneumatic conveying coal line return line pipeline; the axis of the reducer pipe (1) is horizontally arranged.

5. The filter device for the high-pressure dense-phase pneumatic pulverized coal conveying system according to claim 1, wherein: the inner wall of the reducer pipe (1) is a smooth surface.

6. The filter device for the high-pressure dense-phase pneumatic pulverized coal conveying system according to claim 1, wherein: the flanges at the two ends of the reducer pipe (1) are convex-concave surfaces or convex-surface flanges, and the side surfaces of the filter plate (2) are matched with the convex-concave surfaces or the convex-surface flanges.

7. The filter device for the high pressure dense phase pneumatic conveying system of pulverized coal according to claim 6, wherein: the outer edge of the filter plate (2) is provided with a metal winding pad.