CN211041010U

CN211041010U - Device for transferring fly ash in ash hopper of economizer

Info

Publication number: CN211041010U
Application number: CN201921737001.9U
Authority: CN
Inventors: 郭亚; 滕维刚; 黄渊席
Original assignee: Funeng Guizhou Power Generation Co ltd
Current assignee: Funeng Guizhou Power Generation Co ltd
Priority date: 2019-10-16
Filing date: 2019-10-16
Publication date: 2020-07-17
Anticipated expiration: 2029-10-16

Abstract

The utility model discloses a device for transferring coal ash in an ash bucket of an economizer, belonging to the technical field of coal electric denitration devices; it comprises a coal economizer; an ash bucket is arranged on the coal economizer, and the outlet end of the coal economizer is communicated with the gas inlet end of the denitration device through a front flue pipe; the gas outlet end of the denitration device is communicated with the rear flue pipe; the side wall of the ash bucket is provided with an ash falling pipe communicated with the interior of the ash bucket; the other end and the back flue pipe of ash falling pipe are linked together, the utility model provides a current economizer can't in time handle the deposition of ash bucket department, leads to getting into the flue gas dust volume among the denitrification facility great, causes the serious problem of denitrification facility wearing and tearing.

Description

Device for transferring fly ash in ash hopper of economizer

Technical Field

The utility model relates to a coal electric denitration device technical field, concretely relates to shift device of interior fly ash of economizer ash bucket.

Background

In thermal power generation using coal mine, excessive NO is generated after coal in boiler is burnt_XThe environment is polluted, and the coal needs to be fedDenitration treatment is carried out, the existing device for denitration of flue gas generated in the coal mine combustion process is usually arranged between a flue of an economizer and an air preheater, the operating temperature is generally 300-500 ℃, much dust is contained in the flue gas entering the denitration device, denitration catalysts (including plate type structures and honeycomb type structures) are easy to erode and wear or block due to dust, the catalysts are damaged and form cavities when the erosion is serious, the flue gas flows through the catalyst, and NO (nitric oxide) in the flue gas is generated_XCannot be treated to cause NO_XExceeding the standard; the catalyst of jam influences flow area, influences catalyst efficiency, and can play certain natural settling effect to the dust in the economizer, nevertheless because the deposition of ash bucket on the economizer is along with the increase of ash content, and the ash conveying device of former design can't have transported this place ash bucket deposition fast, causes a large amount of dusts to remove along with the flue gas to rear denitrification facility, thereby increases to its wearing and tearing effect, and this is the problem that mainly faces at present.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that will solve is: the utility model provides a device for shift fly ash in economizer ash bucket to solve current economizer and can't in time handle the deposition of ash bucket department, lead to getting into the flue gas dust volume among the denitrification facility great, cause the serious problem of denitrification facility wearing and tearing.

In order to solve the above problem, the utility model provides a following technical scheme:

a device for transferring fly ash in an ash hopper of an economizer comprises the economizer; an ash bucket is arranged on the coal economizer, and the outlet end of the coal economizer is communicated with the gas inlet end of the denitration device through a front flue pipe; the gas outlet end of the denitration device is communicated with the rear flue pipe; the side wall of the ash bucket is provided with an ash falling pipe communicated with the interior of the ash bucket; the other end of the ash falling pipe is communicated with the rear flue pipe.

Preferably, the height of the ash bucket in the vertical direction is higher than the height of the joint of the ash falling pipe and the rear flue pipe, and an air locking device is arranged on the ash falling pipe.

Preferably, the number of the ash falling pipes arranged on the ash hopper is more than two, and the ash falling pipes are uniformly and symmetrically arranged on the ash hopper.

Furthermore, each ash falling pipe is provided with an air lock.

An ash conveying device is also arranged below the ash hopper.

The utility model discloses beneficial effect:

the utility model discloses a set up the ash falling pipe in economizer ash bucket below, and install the airlock on the ash falling pipe, when the deposition of ash falling pipe airlock top is more, the airlock is influenced by deposition gravity and is opened downwards, the deposition falls into the below pipeline through the airlock, the pipeline connects to the flue pipe behind the denitrification facility in ash falling pipe below, the dust shifts to the denitrification facility rear through this ash falling pipe, reduce the dust through denitrification facility, reduce the wearing and tearing and the jam of denitration catalyst, thereby improve the efficiency and the life of denitration catalyst.

Drawings

Fig. 1 is a schematic structural view of the present invention in an embodiment;

description of reference numerals: 1. the system comprises a coal economizer, 2, an ash hopper, 3, a front flue pipe, 4, a denitration device, 5, a rear flue pipe, 6, an ash falling pipe, 7, an air lock, 8 and an ash conveying device.

Detailed Description

The invention will be further described with reference to the following drawings and specific embodiments:

example (b):

referring to fig. 1, the present embodiment provides a device for transferring coal ash in an ash hopper of an economizer, which comprises an economizer 1; an ash bucket 2 is arranged on the coal economizer 1, and the outlet end of the coal economizer 1 is communicated with the air inlet end of a denitration device 4 through a front flue pipe 3; the air outlet end of the denitration device 4 is communicated with the rear flue pipe 5; the method is characterized in that: an ash falling pipe 6 communicated with the interior of the ash bucket 2 is arranged on the side wall of the ash bucket 2; the other end of the ash falling pipe 6 is communicated with the rear flue pipe 5.

The height of the ash bucket 2 in the vertical direction is higher than the height of the joint of the ash falling pipe 6 and the rear flue pipe 5, and an air locking device 7 is arranged on the ash falling pipe 6. The purpose of the airlock 7 is to ensure that it falls from the economizer 1The dust in the hopper 2 contains NO_XThe flue gas is also processed by a rear flue pipe 5 through an ash falling pipe 6, so that the denitration treatment of the part of the flue gas is ensured; the working principle of the air lock 7 is that the air lock is driven by the gravity of the dust on the top, so that the height difference between the connection parts of the ash hopper 2 and the ash falling pipe 6 with the rear flue pipe 5 is limited to meet the normal work.

The number of the ash falling pipes 6 arranged on the ash bucket 2 is more than two, the ash falling pipes 6 are uniformly and symmetrically arranged on the ash bucket 2, and each ash falling pipe 6 is provided with an air locking device 7. A plurality of ash falling pipes 6 that are symmetrical structure can prevent that the dust in ash bucket 2 from appearing accumulational condition in the one side that does not set up ash falling pipe 6 for the dust of this side still directly lets in denitrification facility 4.

An ash conveying device 8 is also arranged below the ash bucket 2. The ash conveying device 8 is kept on the premise that the ash falling pipe 6 is arranged, so that the effect of safety redundancy protection on the whole system is achieved, and emergency operation can be completed through the ash conveying device 8 under the condition that the air lock 7 fails and dust transfer cannot be achieved.

Use the utility model discloses during the device shifts the fly ash in ash bucket 2 on economizer 1, mainly subside the deposition by nature earlier in the ash bucket 2, then the dust lets in along ash dropping pipe 6 when the dust that subsides goes up the position of ash dropping pipe 6, then airlock 7 is opened by the influence of deposition gravity in the ash dropping pipe 6, make the deposition get into in the back flue pipe 5 after passing through airlock 7, thereby effectively reduce the volume of the dust through denitrification facility 4, and then reduced the wearing and tearing and the jam of denitration catalyst.

Claims

1. A device for transferring fly ash in an ash hopper of an economizer comprises the economizer (1); the method is characterized in that: an ash bucket (2) is arranged on the coal economizer (1), and the outlet end of the coal economizer (1) is communicated with the air inlet end of the denitration device (4) through a front flue pipe (3); the air outlet end of the denitration device (4) is communicated with the rear flue pipe (5); an ash falling pipe (6) communicated with the interior of the ash bucket (2) is arranged on the side wall of the ash bucket (2); the other end of the ash falling pipe (6) is communicated with the rear flue pipe (5).

2. The device for transferring coal ash in an ash hopper of an economizer according to claim 1, wherein: the height of the ash bucket (2) in the vertical direction is higher than the height of the joint of the ash falling pipe (6) and the rear flue pipe (5), and an air locking device (7) is arranged on the ash falling pipe (6).

3. The device for transferring coal ash in an ash hopper of an economizer according to claim 1, wherein: the number of the ash falling pipes (6) arranged on the ash bucket (2) is more than two, and the ash falling pipes (6) are uniformly and symmetrically arranged on the ash bucket (2).

4. The device for transferring the fly ash in the hopper of an economizer according to claim 2 or 3, wherein: each ash falling pipe (6) is provided with an air lock (7).

5. The device for transferring coal ash in an ash hopper of an economizer according to claim 1, wherein: an ash conveying device (8) is also arranged below the ash bucket (2).