CN218452266U - Dustproof discharge system of coal pulverizer stone coal - Google Patents

Abstract

The utility model belongs to the technical field of power plant equipment, a dustproof discharge system of coal pulverizer stone coal is disclosed. The system comprises a first discharge pipeline arranged on each coal mill unit and a plurality of second discharge pipelines connected with the first discharge pipeline, wherein one end of the first discharge pipeline is connected to the bottom of a cold ash bucket body of one coal mill unit, the other end of the first discharge pipeline is sequentially connected to a pebble coal bucket of the other coal mill unit, and a check valve is arranged on the first discharge pipeline; one end of each of the second discharge pipelines is fixedly connected to the first discharge pipeline, the other end of each of the second discharge pipelines is connected to the coal mill body of the coal mill unit in sequence, and a pressure release valve and a feed valve are arranged on each of the second discharge pipelines. Through the utility model discloses a system, when carrying out the stone coal emission, through check valve and the relief valve with the mutual interconnection of feed valve, utilize the furnace negative pressure that is connected with the cold ash bucket to carry out the pressure release to the stone coal bucket, avoided the dust excessive, cause the interior raise dust pollution of boiler factory building.

Description

Dustproof discharge system of coal pulverizer stone coal

Technical Field

The utility model belongs to the technical field of power plant equipment, concretely relates to dustproof discharge system of coal pulverizer stone coal.

Background

Along with the increasing of environmental protection strength in China and the aim of reducing carbon emission, the requirement for unorganized dust emission of a thermal power plant is more and more strict. The system that adopts at present, when transporting the pebble coal scuttle, because the pebble coal scuttle internal pressure is higher, is close coal pulverizer entry primary air pressure, need carry out the pressure release to the pebble coal scuttle, then open sealing device. In the process, a small amount of dust can overflow, the unorganized emission of the dust is increased, and the boiler workshop is easily polluted by the dust.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a dust-proof discharge system for pebble coal of a coal mill, which solves the problems in the prior art;

in order to achieve the above object, the present invention provides the following technical solutions:

a dust-proof discharge system for pebble coal of a coal mill comprises a first discharge pipeline and a plurality of second discharge pipelines, wherein,

the one end fixed connection of first discharge duct is in the bottom of the cold ash bucket of coal pulverizer place unit, and is a plurality of the one end of second discharge duct in proper order parallel with first discharge duct's body fixed connection, first discharge duct's the other end port with the other end port of second discharge duct all with the sealing device looks fixed connection on the rest coal pulverizer unit stone coal scuttle, and be provided with the check valve on the first discharge duct, be provided with the relief valve on every second discharge duct.

Further, sealing device includes the sealed cabin, the one end of sealed cabin is fixed to be set up in the other end of second discharge pipeline, the other end of sealed cabin is connected with the coal pulverizer through third discharge pipeline.

Furthermore, the coal bunker also comprises a pebble coal bunker, and the pebble coal bunker is detachably connected with the sealed cabin.

Furthermore, an air cylinder is fixedly arranged on the pebble coal hopper, and a piston rod of the air cylinder is fixedly connected with the sealed cabin.

Further, a feeding valve is arranged on the third discharge pipeline.

Further comprises a steel belt machine and a steel belt motor, wherein,

the steel belt machine is arranged below the cold ash hopper;

the steel belt motor is arranged on the steel belt machine and fixedly connected with the steel belt machine.

Further, the pressure relief valve is interlocked with a feed valve, and the feed valve is connected with an external controller.

Compared with the prior art, the utility model has the advantages of:

the utility model discloses a dustproof discharge system of coal pulverizer stone coal, set up first pipeline and a plurality of second pipeline between the stone coal scuttle through the cold ash bucket at the coal pulverizer unit and coal pulverizer, and set up the check valve on first pipeline, set up the relief valve on every second pipeline, and the structure that is connected the sealing device on second pipeline and the coal pulverizer stone coal scuttle, make when the coal scuttle pressure release, can pass through first discharge tube and second discharge tube through the malleation in the negative pressure with the stone coal scuttle in through the cold ash bucket, structure through the relief valve, can control the dust in the stone coal scuttle and shift, again through the structure of check valve, make the dust after shifting can't get back to in the stone coal scuttle, a small amount of dust inorganization is discharged and is excessive when having avoided the stone coal scuttle to carry out the pressure release, cause boiler house raise dust pollution.

Furthermore, the pressure release valve is interlocked with the feed valve, the feed valve is connected with an external controller, the positive pressure in the pebble coal hopper is directly detected through the controller, the feed valve, the check valve and the pressure release valve are adjusted to be opened and closed through the detection result, the probability of manual intervention and manual operation errors is reduced, and the dustproof discharge is more reliable.

Drawings

The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention. In the drawings:

FIG. 1 is a schematic view of the overall structure of a pebble coal dust-proof discharge system of a coal mill of the present invention;

wherein: the device comprises a first discharge pipeline 1, a second discharge pipeline 2, a check valve 3, a pressure release valve 4, a coal mill 5, a feed valve 6, a pebble coal hopper 7, a sealed cabin 8, a steel belt machine 9, a steel belt motor 10, a cold ash hopper 11, a third discharge pipeline 12 and a cylinder 13.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments. It should be noted that, in the case of no conflict, the embodiments and features of the embodiments of the present invention may be combined with each other.

The following detailed description is exemplary in nature and is intended to provide further explanation of the invention as claimed. Unless otherwise defined, all technical terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the invention.

The utility model discloses a dustproof discharge system of coal pulverizer 5 stone coal, as shown in fig. 1, set up first pipeline and a plurality of second pipeline between the stone coal scuttle 7 through cold ash bucket 11 and coal pulverizer 5 at coal pulverizer 5 unit, and set up check valve 3 on first pipeline, set up the structure of relief valve 4 on every second pipeline, and be connected the second pipeline with the sealing device on coal pulverizer 5 stone coal scuttle 7, make when the coal scuttle pressure release, can pass through first discharge tube 1 and second discharge tube 2 through the malleation in the stone coal scuttle 7 of negative pressure in the cold ash bucket 11, and set up check valve 3 and relief valve 4 on first discharge tube 1 and second discharge tube 2 and shift the dust in the stone coal scuttle 7, again through the structure of check valve 3, make the dust after shifting can't return to in the stone coal scuttle 7, a small amount of dust inorganization pressure release and external pollution when having avoided stone coal scuttle 7 to carry out the factory building, cause boiler raise dust pollution.

Specifically, the cold ash bucket of the unit where the coal mill is located is in negative pressure during normal operation, and the check valve 3 is a one-way valve; the function of the device is to prevent the stone coal hopper from emitting ash when the cold ash hopper fails and emits positive pressure.

Specifically, the first discharge pipeline 1 is arranged between the coal pulverizer 5 units, the first discharge pipeline 1 is provided with a second discharge pipeline 2 connected with the first discharge pipeline 1, one ends of the second discharge pipeline 2 are fixedly connected to the body of the first discharge pipeline 1 at intervals in parallel, one end of the first discharge pipeline 1 is fixedly connected to the bottom of a coal hopper 11 body in one coal pulverizer 5 unit, and the other end port of the second discharge pipeline 2 and the other end port of the first discharge pipeline 1 are connected with sealing devices on stone coal hoppers 7 in the other coal pulverizer 5 units.

Preferably, the length of the conduit is 100 cm.

Specifically, the sealing device is a sealed cabin 8, one end of the sealed cabin 8 is fixedly arranged at the other end of the second discharge pipeline 2, and the other end of the sealed cabin 8 is connected with the coal mill 5 through a third discharge pipeline 12. Specifically, the sealed cabin 8 is a hollow cavity structure, the bottom of the sealed cabin 8 is provided with a cylindrical structure matched with an opening on the pebble coal bucket 7, the top of the sealed cabin 8 is provided with two through holes, and the two through holes of the sealed cabin 8 are respectively fixedly and hermetically connected with one ends of the second discharge pipeline 2 and the third discharge pipeline 12.

Specifically, a pebble coal hopper 7 is further arranged on the second pipeline, the pebble coal hopper 7 is located between the pressure release valve 4 and the feeding valve 6 on the second pipeline, a cylinder 13 is further arranged at the top of the pebble coal hopper 7, the cylinder 13 is fixedly connected to the top of the pebble coal hopper 7, and a piston rod of the cylinder 13 is fixedly connected to one side of the sealed cabin 8. When the sealed cabin 8 is opened from the opening on the pebble coal hopper 7, a piston rod arranged on the pebble coal hopper 7 is ejected out, so that the sealed cabin 8 leaks out from the opening on the top of the pebble coal hopper 7, and the coal unloading of the pebble coal hopper is completed; in a normal working state, the pebble coal hopper 7 and the sealed cabin 8 are in a sealed state.

Specifically, the utility model discloses a coal pulverizer 5 pebble coal discharge system that prevents dust still includes steel band machine 9 and steel band motor 10, and wherein steel band machine 9 is located the below of cold ash bucket 11, and steel band motor 10 is fixed to be set up in the one end of steel band machine 9, and it is mutually fixed connection to communicate with each other through the screw thread with steel band machine 9.

Specifically, the utility model discloses an all discharge pipe in the dustproof discharge system of coal pulverizer stone coal are sealing connection between with the component.

Specifically, the pressure relief valve 4 is interlocked with the feed valve 6, and the feed valve 6 is connected with an external controller. The interlocking in the utility model is feedback regulation by a controller, namely when the feed valve 6 on the third discharge pipeline 12 is closed, the pressure release valves on the first discharge pipeline 1 and the second discharge pipeline 2 are automatically opened; the pressure relief valves located on the first 1 and second 2 discharge conduits are automatically closed when the inlet valve 6 on the third discharge conduit 12 is opened.

Specifically, the utility model discloses a coal pulverizer 5 stone coal discharge system that prevents dust's principle does: a first discharge pipeline 1 with the length of about 100 cm is arranged on each coal mill 5 unit, one end of the first discharge pipeline 1 is connected to the upper portion of a furnace bottom slag steel belt machine 9, namely is connected with a cold ash bucket 11, then the first discharge pipeline 1 is connected with a pressure relief system in a pebble coal system of each coal mill 5, namely is connected to a pebble coal bucket 7 of the coal mill 5 unit through a second discharge pipeline 2 connected with the first discharge pipeline 1, and a feed valve 6 is additionally arranged on a third discharge pipeline 12, connected with the pebble coal bucket, of each coal mill 5 respectively, when pebble coal is not discharged, the feed valve 6 is kept closed, and the coal mill 5 is prevented from leaking air to the pebble coal bucket 7 and generating dust. When pebble coal needs to be discharged, a feed valve 6 on a pebble coal hopper 7 connected with a third discharge pipeline 12 is closed, after a closing signal of the feed valve 6 is detected in an external control system, a pressure relief valve 4 is automatically connected, the pebble coal hopper 7 is subjected to pressure relief by using negative pressure of a hearth, so that the pebble coal hopper 7 keeps micro negative pressure, and a small amount of dust contained in the pressure relief enters a furnace bottom slag system; then, opening the pebble coal sealing device, and closing a pressure release valve 4 on a second pipeline connected with a pebble coal hopper 7 in an interlocking manner after the sealing device is opened in place to prevent air leakage at the bottom of the furnace; meanwhile, in order to prevent potential safety hazards caused by gas emission of the pebble coal hopper 7 and aggravate dust diffusion when the hearth emits positive pressure, the check valve 3 is arranged on the first emission pipeline 1, and the safe operation of the pressure relief device is guaranteed.

It will be appreciated by those skilled in the art that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes within the scope of the invention or within the scope equivalent to the invention are all embraced by the invention.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same, and although the present invention is described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: modifications and equivalents of the embodiments of the invention may be made without departing from the spirit and scope of the invention, which should be construed as falling within the scope of the claims of the invention.

Claims (7)

1. A dust-proof discharge system for pebble coal of a coal mill is characterized by comprising a first discharge pipeline (1) and a plurality of second discharge pipelines (2), wherein,

one end fixed connection of first discharge pipe way (1) is in the bottom of coal pulverizer place unit cold ash fill (11), and is a plurality of the one end of second discharge pipe way (2) in proper order parallel with the body fixed connection of first discharge pipe way (1), the other end port of first discharge pipe way (1) with the other end port of second discharge pipe way (2) all in proper order with the sealing device looks fixed connection on other coal pulverizer unit stone coal fill (7), and be provided with check valve (3) on first discharge pipe way (1), be provided with relief valve (4) on every second discharge pipe way.

2. The dust-proof discharging system for pebble coal of a coal mill as claimed in claim 1, wherein the sealing device is a sealed cabin (8), one end of the sealed cabin (8) is fixedly arranged at the other end of the second discharging pipeline (2), and the other end of the sealed cabin (8) is connected with the coal mill (5) through a third discharging pipeline (12).

3. The coal pulverizer pebble coal dust discharge system of claim 2, further comprising a pebble coal hopper (7), wherein the pebble coal hopper (7) is detachably connected with the sealed cabin (8).

4. The dust-proof discharging system for the pebble coal of the coal mill as claimed in claim 3 is characterized in that a cylinder (13) is fixedly arranged on the pebble coal hopper (7), and a piston rod of the cylinder (13) is fixedly connected with the sealed cabin (8).

5. The coal pulverizer pebble coal dust discharge system of claim 2, wherein a feed valve (6) is provided on the third discharge conduit (12).

6. The coal pulverizer pebble coal dust discharge system of claim 1, further comprising a steel belt machine (9) and a steel belt motor (10), wherein,

the steel belt machine (9) is arranged below the cold ash hopper (11);

the steel belt motor (10) is arranged on the steel belt machine (9) and is fixedly connected with the steel belt machine (9).

7. The coal pulverizer pebble coal dust discharge system of claim 1, wherein the pressure relief valve (4) is interlocked with a feed valve (6), the feed valve (6) being connected to an external controller.

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