CN217441654U

CN217441654U - Smoke blocking device of grate waste incineration waste heat boiler

Info

Publication number: CN217441654U
Application number: CN202221338507.4U
Authority: CN
Inventors: 王欢; 郎鹏德; 郎秀荣; 蔡祥义; 杨荣青; 韩兆强; 尚群
Original assignee: Shanxi Lantian Environmental Protection Equipment Co ltd
Current assignee: Shanxi Lantian Environmental Protection Equipment Co ltd
Priority date: 2022-05-31
Filing date: 2022-05-31
Publication date: 2022-09-16
Anticipated expiration: 2032-05-31

Abstract

The utility model belongs to the technical field of waste incineration waste gas treatment, and relates to a smoke blocking device of a grate waste incineration waste heat boiler; a smoke baffle plate is arranged between the lower end of the convection heating surface of the horizontal flue and the ash bucket; the upper end of the smoke baffle is superposed with the lower end of the convection heating surface, the lower end of the smoke baffle is parallel to the inner wall of the ash bucket, and the height of the part of the smoke baffle extending into the ash bucket is more than or equal to half of the height of the ash bucket; the smoke baffle blocks the ash bucket and a smoke corridor formed by an ash area which is not stored in the ash bucket, the smoke is prevented from flowing around, the smoke is prevented from flowing through the ash bucket, secondary entrainment of settled ash is reduced, the dust removal efficiency in the convection heating surface of the boiler is improved, and the dust content of smoke at the outlet of the boiler is reduced.

Description

Smoke blocking device of grate waste incineration waste heat boiler

Technical Field

The utility model belongs to the technical field of msw incineration exhaust-gas treatment, a grate msw incineration exhaust-heat boiler keeps off cigarette device is related to.

Background

Along with the improvement of the living standard of human beings, the yield of the generated solid waste is larger and larger, and the environmental protection problem is more and more prominent. The garbage incineration is the fastest and most effective garbage reduction and harmless treatment mode at present. The grate waste incineration boiler has wide adaptability to waste fuel and excellent combustion characteristic, and simultaneously generates electricity and creates income by using heat energy released after waste is combusted. Is increasingly widely applied to the harmful-to-beneficial conversion process of solid wastes.

Due to the structural particularity of the waste heat boiler, the convection flue is horizontally arranged, the convection heating surface is vertically arranged in the flue, the ash bucket collects and discharges ash settled due to the change of the flow velocity of the flue gas in the horizontal flue, and the soot blowing device on the heating surface blows accumulated ash swept by the heating surface. In the prior art, no obstacle is arranged between the lower part of the convection heating surface and the ash bucket, short circuit is easily formed when the boiler starts to operate, and the flue gas flows at high speed below the heating surface to form secondary entrainment on settled ash, so that the separation effect is weakened. The load of the tail flue gas dust removal system is increased.

SUMMERY OF THE UTILITY MODEL

The utility model overcomes the defects of the prior art and provides a smoke blocking device of a grate waste incineration waste heat boiler, which is used for eliminating a smoke corridor at the lower part of a convection heating surface of a horizontal flue and solving the problem of secondary entrainment of settled ash in an ash hopper by smoke; meanwhile, the convection heat transfer of the convection heating surface is increased.

In order to achieve the above purpose, the present invention is achieved by the following technical solutions.

A fire grate waste incineration exhaust-heat boiler smoke blocking device is characterized in that a smoke blocking plate is arranged between the lower end of a convection heating surface of a horizontal flue and an ash bucket; the upper end of the smoke baffle is superposed with the lower end of the convection heating surface, the lower end of the smoke baffle is parallel to the inner wall of the ash bucket, and the height of the part of the smoke baffle extending into the ash bucket is more than or equal to half of the height of the ash bucket.

Furthermore, the smoke baffle plates are symmetrically arranged between the lower end of the convection heating surface of the horizontal flue and the ash bucket.

Further, the upper end of the smoke baffle plate is superposed with the lower end of the convection heating surface by 100-150 mm.

Furthermore, the smoke baffle plate extends into half of the height of the ash bucket.

Furthermore, the smoke baffle plate consists of an upper smoke baffle plate and a lower smoke baffle plate, the upper part of the upper smoke baffle plate is fixed in the horizontal flue, and the lower part of the upper smoke baffle plate is fixed on the ash bucket; the upper part of the lower smoke baffle is fixed on the ash bucket, and the lower part of the upper smoke baffle is superposed with the upper part of the lower smoke baffle.

Furthermore, the upper smoke baffle and the lower smoke baffle are connected to a cross beam, and the cross beam is fixed between the lower end of the convection heating surface of the horizontal flue and the ash bucket.

The utility model discloses produced beneficial effect does for prior art:

the utility model discloses install additional in the lower extreme of horizontal flue convection heating surface and ash bucket space department and keep off the cigarette board. The flue gas corridor formed by the ash bucket and the ash area not stored in the ash bucket is effectively blocked, the flue gas circumfluence is stopped, the flue gas throughput of the convection heating surface is ensured, the flue gas flow velocity of the heating surface area is improved, and the heat exchange of the area is enhanced.

A smoke baffle is additionally arranged at the gap between the lower end of the convection heating surface of the horizontal flue and the ash bucket. Successfully blocks the flow of the flue gas through the ash bucket, reduces the secondary entrainment of settled ash in the flue gas, and improves the dust removal efficiency in the convection heating surface of the boiler, thereby reducing the dust content of the flue gas at the outlet of the boiler. The workload of the boiler dust remover and the bag back-blowing frequency are reduced. The replacement cycle of the cloth bag dust remover is prolonged. The operating cost of the dust remover is saved.

Drawings

Fig. 1 is a front view of the smoke barrier device of the present invention.

Fig. 2 is a left side view of fig. 1.

In the figure, 1-left upper smoke baffle, 2-left lower smoke baffle, 3-right upper smoke baffle, 4-right lower smoke baffle, 5-horizontal flue convection heating surface, 6-ash bucket and 7-beam.

Detailed Description

In order to make the technical problem, technical scheme and beneficial effect that the utility model will solve more clearly understand, combine embodiment and attached drawing, it is right to go on further detailed description the utility model discloses. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. The technical solution of the present invention is described in detail below with reference to the embodiments and the drawings, but the scope of protection is not limited thereto.

As shown in fig. 1 and 2, the embodiment provides a smoke blocking device of a grate waste incineration waste heat boiler, wherein smoke blocking plates are symmetrically arranged between the lower end of a convection heating surface 5 of a horizontal flue and an ash bucket 6 in a left-right mode; the smoke baffle plate consists of four blocks: a left upper smoke baffle 1, a left lower smoke baffle 2, a right upper smoke baffle 3 and a right lower smoke baffle 4; the lower part of the left upper smoke baffle 1 and the upper part of the left lower smoke baffle 2 are fixed together through a cross beam 7, the right upper smoke baffle 3 and the right lower smoke baffle 4 are fixed together through another cross beam 7, and the two cross beams 7 are symmetrically fixed between the lower end of the convection heating surface 5 of the horizontal flue and the ash bucket 6.

The upper ends of the left upper smoke baffle 1 and the right upper smoke baffle 3 are superposed with the lower end of the convection heating surface 5 of the horizontal flue by 100-150 mm. The left lower smoke baffle 2 and the right lower smoke baffle 4 are both parallel to the inner wall of the ash bucket 6, and the height of the part, extending into the ash bucket, of the left lower smoke baffle 2 and the right lower smoke baffle 4 is more than half of the height of the ash bucket. The material of the smoke baffle plate is heat-resistant steel (12 Cr18Ni 9).

The smoke baffle effectively blocks a smoke corridor formed by the ash bucket and an ash area which is not stored in the ash bucket, stops smoke from flowing around, ensures the smoke throughput of the convection heating surface, improves the smoke flow rate of the heating surface area, and enhances the heat exchange of the area. Meanwhile, the flow of the flue gas through the ash bucket is blocked, the secondary entrainment of settled ash in the flue gas is reduced, and the dust removal efficiency in the convection heating surface of the boiler is improved, so that the dust content of the flue gas at the outlet of the boiler is reduced. The workload of the boiler dust remover and the bag back-blowing frequency are reduced. The replacement cycle of the cloth bag dust remover is prolonged. The operating cost of the dust remover is saved.

The above description is for further details of the present invention with reference to specific preferred embodiments, and it should not be understood that the embodiments of the present invention are limited thereto, and it will be apparent to those skilled in the art that the present invention can be implemented in a plurality of simple deductions or substitutions without departing from the scope of the present invention, and all such alterations and substitutions should be considered as belonging to the present invention, which is defined by the appended claims.

Claims

1. A fire grate waste incineration exhaust-heat boiler smoke blocking device is characterized in that a smoke blocking plate is arranged between the lower end of a convection heating surface of a horizontal flue and an ash bucket; the upper end of the smoke baffle is superposed with the lower end of the convection heating surface, the lower end of the smoke baffle is parallel to the inner wall of the ash bucket, and the height of the part of the smoke baffle extending into the ash bucket is more than or equal to half of the height of the ash bucket.

2. The smoke blocking device of the grate waste incineration waste heat boiler as claimed in claim 1, wherein the smoke blocking plates are arranged between the lower end of the convection heating surface of the horizontal flue and the ash bucket in a left-right symmetry manner.

3. The smoke blocking device for the grate waste incineration waste heat boiler as recited in claim 1, wherein the upper end of the smoke blocking plate and the lower end of the convection heating surface are overlapped by 100-150 mm.

4. The fire grate waste incineration waste heat boiler smoke blocking device of claim 1, wherein the smoke blocking plate extends into half of the height of the ash bucket.

5. The fire grate waste incineration waste heat boiler smoke baffle device of claim 1, wherein the smoke baffle plate is composed of an upper smoke baffle plate and a lower smoke baffle plate, the upper part of the upper smoke baffle plate is fixed in the horizontal flue, and the lower part of the upper smoke baffle plate is fixed on the ash bucket; the upper part of the lower smoke baffle is fixed on the ash bucket, and the lower part of the upper smoke baffle is superposed with the upper part of the lower smoke baffle.

6. The fire grate waste incineration waste heat boiler smoke blocking device of claim 5, wherein the upper smoke blocking plate and the lower smoke blocking plate are connected to a cross beam, and the cross beam is fixed between the lower end of the convection heating surface of the horizontal flue and the ash bucket.