CN110173608B

CN110173608B - Self-compensating powder pipe elbow anti-abrasion device with coal dropping pipe

Info

Publication number: CN110173608B
Application number: CN201910393699.5A
Authority: CN
Inventors: 孙洪坤; 段刚; 金荣玉
Original assignee: DATANG CHANGCHUN THIRD THERMAL POWER PLANT
Current assignee: DATANG CHANGCHUN THIRD THERMAL POWER PLANT
Priority date: 2019-05-13
Filing date: 2019-05-13
Publication date: 2021-07-30
Anticipated expiration: 2039-05-13
Also published as: CN110173608A

Abstract

The invention relates to a self-compensating type powder pipe elbow anti-abrasion device with a coal dropping pipe, which comprises a powder pipe and a powder pipe elbow, wherein a blind pipe is arranged on the outer arc side of the windward side of the powder pipe elbow, the blind pipe is connected with the coal dropping pipe, and the coal dropping pipe is provided with a first inserting plate door and a second inserting plate door; the coal dropping pipe is used for adding coal blocks into the blind pipe by alternately opening and closing the first inserting plate door and the second inserting plate door; the blind pipe is used for enabling the pulverized coal passing through the pulverized coal pipe elbow to rub with the coal briquette in the blind pipe, so that the coal on the surface layer of the coal briquette is peeled off to form pulverized coal which is carried away by hot air in the pulverized coal pipe. The invention can greatly relieve the abrasion of the coal dust to the elbow.

Description

Self-compensating powder pipe elbow anti-abrasion device with coal dropping pipe

Technical Field

The invention relates to the technical field of thermal power generation, in particular to a self-compensation type powder pipe elbow anti-abrasion device with a coal dropping pipe.

Background

As is well known, a thermal power plant is a plant that supplies hot water for heating and stable electric power to society by burning coal to convert chemical energy of coal into heat energy and electric energy. Coal is ground into very fine coal powder in a coal grinding machine, the fine coal powder is carried by hot air to enter a hearth through a powder pipe to be combusted, the powder pipe has a long path and a plurality of elbows, the elbows are washed by the coal powder for a long time, the powder pipe elbows are frequently abraded and leaked, the coal powder is leaked, fuel loss and environmental pollution are caused, and high-fineness coal powder is exposed in air and is easy to spontaneously combust to cause fire.

Disclosure of Invention

The invention aims to provide a self-compensating type abrasion-proof device for a powder pipe elbow, which is provided with a coal dropping pipe, so as to prevent high-temperature coal powder from abrading the pipeline elbow.

The invention provides a self-compensating type powder pipe elbow anti-abrasion device with a coal dropping pipe, which comprises a powder pipe and a powder pipe elbow, wherein a blind pipe is arranged on the outer arc side of the windward side of the powder pipe elbow, the blind pipe is connected with the coal dropping pipe, and the coal dropping pipe is provided with a first inserting plate door and a second inserting plate door;

the coal dropping pipe is used for adding coal blocks into the blind pipe by alternately switching on and off the first inserting plate door and the second inserting plate door;

the blind pipe is used for enabling the pulverized coal passing through the powder pipe elbow to rub with the coal briquette in the blind pipe, so that the coal on the surface layer of the coal briquette is peeled off to form the pulverized coal which is carried away by hot air in the powder pipe.

Further, the blind pipe is provided with an observation window for observing the coal briquette amount.

Furthermore, the first inserting plate door and the second inserting plate door are electric doors or manual doors.

Furthermore, the powder pipe elbow and the blind pipe are wrapped with heat-insulating layers.

By means of the scheme, the abrasion of the coal powder to the elbow can be greatly relieved through the self-compensation type powder pipe elbow abrasion-proof device with the coal dropping pipe.

The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.

Drawings

Fig. 1 is a schematic structural diagram of a self-compensating powder pipe elbow wear-resisting device with a coal dropping pipe.

Reference numbers in the figures:

1-an insulating layer; 2-powder tube; 3-pulverized coal; 4-powder pipe elbow; 5-a number one gate; 6-a coal dropping pipe; 7-second inserting plate door; 8-an observation window; 9-blind pipe; 10-coal block.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Referring to fig. 1, the embodiment provides a self-compensating powder pipe elbow wear-resisting device with a coal dropping pipe, which includes a powder pipe 2 and a powder pipe elbow 4, a blind pipe 9 is installed on the outer arc side of the windward side of the powder pipe elbow 4, the blind pipe 9 is connected with a coal dropping pipe 6, and the coal dropping pipe 6 is provided with a first inserting plate door 5 and a second inserting plate door 7;

the coal dropping pipe 6 is used for adding coal blocks 10 into the blind pipe 9 by alternately switching the first inserting plate door 5 and the second inserting plate door 7;

the blind pipe 9 is used for enabling the coal dust 3 passing through the powder pipe elbow 4 to rub with the coal briquette 10 in the blind pipe 9, so that the coal on the surface layer of the coal briquette 10 is peeled off to form the coal dust, and the coal dust is carried away (enters a hearth for combustion) through hot air in the powder pipe 2.

This embodiment is through installing one section blind pipe part that has the coal breakage pipe additional on the powder pipe elbow (trompil), and the coal cinder is stored in the blind pipe after passing through the coal breakage pipe, and the buggy erodees the coal cinder when advancing the elbow, not with elbow windward side direct contact to play the effect of protection powder pipe elbow, when stock behind the coal cinder wearing and tearing in the blind pipe can not reach the protection elbow effect, continue to drop into the coal cinder and supply, reach protective layer self-compensation nature, draw materials on the spot, it is effective to go forward.

In the present embodiment, the blind pipe 9 is provided with an observation window 8 for observing the amount of coal briquettes. The observation window can be flexibly arranged at any position of the blind pipe so as to observe the amount of the coal blocks in the blind pipe, and the observation window is simple in structure and convenient to construct.

In the present embodiment, the first inserting plate door 5 and the second inserting plate door 7 are electric doors or manual doors. The door body is not limited in form, and the door body can be used for switching off and sealing.

In this embodiment, the powder pipe 2, the powder pipe elbow 4 and the blind pipe 9 are wrapped with the insulating layer 1.

In this embodiment, the direction of the coal chute 6 can be adjusted according to the direction of the powder duct elbow 4, as shown in fig. 1, the powder duct elbow is an elbow with a horizontal duct turning upward, and the coal chute 6 and the elbow are on the same plane in the vertical direction. When the bend of the powder pipe turns in the horizontal direction, the falling direction of the coal dropping pipe 6 is unchanged, and the plane of the coal dropping pipe is vertical to the plane of the bend turning. The adjustment is very convenient.

During operation, the first inserting plate door 5 is opened first, the second inserting plate door 7 is closed, the first inserting plate door 5 is closed first after the coal block amount falling above the second inserting plate door 7 meets the requirement, the second inserting plate door 7 is opened later, the coal block 10 falls into the blind pipe 9 through the inserting plate door by the coal falling pipe 6, and the second inserting plate door 7 is closed after the coal block amount in the blind pipe 9 meets the protection requirement. The operation is that the coal dust 3 in the coal dust pipe 2 is carried by high-temperature hot air, once the two inserting plate doors are opened simultaneously, the hot air reversely enters the coal dropping pipe 6 through the inserting plate doors, and the sealing effect is mainly achieved. When the hot air carrying the coal dust 3 passes through the powder pipe elbow 4 in the powder pipe 2, the coal briquette 10 in the blind pipe 9 is washed on the windward side of the powder pipe elbow 4, the coal briquette 10 plays a role in protecting the elbow, and meanwhile, the hot air carries away the coal dust stripped from the coal briquette 10. The consumption of the coal blocks 10 in the blind pipe can be observed through the observation window 8, and the operation is repeated before the coal blocks 10 are consumed and cannot play a role in protection.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, it should be noted that, for those skilled in the art, many modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims

1. A self-compensating powder pipe elbow anti-abrasion device with a coal dropping pipe is characterized by comprising a powder pipe and a powder pipe elbow, wherein a blind pipe is arranged on the outer arc side of the windward side of the powder pipe elbow, the blind pipe is connected with the coal dropping pipe, and the coal dropping pipe is provided with a first inserting plate door and a second inserting plate door;

the coal dropping pipe is used for adding coal blocks into the blind pipe by alternately opening and closing the first inserting plate door and the second inserting plate door;

the blind pipe is used for enabling the pulverized coal passing through the pulverized coal pipe elbow to rub with the coal briquette in the blind pipe, so that the coal on the surface layer of the coal briquette is peeled off to form pulverized coal which is carried away by hot air in the pulverized coal pipe.

2. The self-compensating powder duct elbow wear prevention device with a coal drop tube of claim 1, wherein the blind pipe is provided with an observation window for observing the amount of coal lumps.

3. The self-compensating powder pipe elbow wear prevention device with a coal chute as recited in claim 1 or 2, wherein the first and second spile doors are electric doors or manual doors.

4. The self-compensating powder pipe elbow wear prevention device with a coal drop pipe as recited in claim 1, wherein the powder pipe, the powder pipe elbow and the blind pipe are wrapped with an insulating layer.