Water-cooling plate type flue gas guiding device of waste incineration boiler

Abstract

The invention discloses a waste incineration boiler water cooling plate type flue gas guide device which comprises a waste heat boiler second and third flue ash hopper, a flue gas guide device is arranged in the waste heat boiler second and third flue ash hopper, and the flue gas guide device comprises a double-layer flat plate type guide plate. The double-layer flat plate type flow guide plate is a cavity box body composed of two parallel folded plates and a peripheral sealing steel plate, round steel used for reinforcing the cavity box body is welded between the folded plates, a pipeline and a flange are arranged on the lower portion of the side face of the double-layer flat plate type flow guide plate to serve as a cooling water inlet, and a cooling water outlet is formed in the upper portion of the side face of the double-layer flat plate type flow guide plate. The problem that flue gas at the second flue and the third flue flows seriously is solved, overheating carbonization of peripheral sealing steel plates can be prevented, the structural stability of the second flue and the third flue of the boiler can be improved by placing the double-layer flat plate type guide plate in the ash hopper of the second flue and the third flue of the boiler, meanwhile, the flue gas temperature is reduced, and energy-saving economic benefits are generated.

Description

Technical Field

[0001] The invention relates to the technical field of boilers, and in particular to a water-cooled plate-type flue gas guide device for a garbage incineration boiler. Background Art

[0002] During the operation of waste heat boilers from garbage incineration, the flue gas deflection and ash accumulation in the area where the flue gas turns 180° are particularly prominent, especially in the second and third flues of vertical waste heat boilers. The ash accumulation behind the furnace extends upward from the ash hopper to the convection heating surface area, and the superheater near the rear wall frequently bursts, seriously affecting the economic and stable operation of the waste heat boiler. According to the distribution of the flue gas flow field, arranging guide plates at the flue gas turning point can effectively alleviate the problem of flue gas deflection and ash accumulation. In actual operation, it is found that if the guide plates made of steel plates are protected by casting materials, the casting material surface is rough and the ash accumulation is serious. If casting materials are not used for protection, the steel plates will soon dry burn and carbonize. Summary of the invention

[0003] The purpose of the present invention is to solve the technical problems existing in the prior art and to provide a water-cooled plate-type flue gas guide device for a garbage incineration boiler.

[0004] To achieve the above-mentioned purpose, the technical solution provided by the present invention is: a water-cooled plate-type flue gas diversion device for a waste incineration boiler, comprising a second and third flue ash hopper of a waste heat boiler, a flue gas diversion device is arranged in the second and third flue ash hopper of the waste heat boiler, and the flue gas diversion device comprises a double-layer flat-plate guide plate, the double-layer flat-plate guide plate is a cavity box composed of two parallel folded plates and a peripheral sealing steel plate, and round steel is welded between the folded plates for reinforcing the cavity box. A pipe and a flange are arranged on the lower part of the side of the double-layer flat-plate guide plate as a cooling water inlet, and a cooling water outlet is arranged on the upper part of the side of the double-layer flat-plate guide plate. Circulating cooling water enters the double-layer flat-plate guide plate from the cooling water inlet at the lower part, and the circulating water absorbs the heat of the peripheral sealing steel plate and is drawn out from the cooling water outlet at the upper part.

[0005] Preferably, the double-layer flat guide plate is arranged according to the angle of the second and third flue ash hoppers of the waste heat boiler and the direction of the flue gas flow.

[0006] Preferably, the outer surface of the double-layer flat-plate guide plate does not need to be protected by castable material.

[0007] Preferably, the weld seams on the outer surfaces of the double-layer flat-plate guide plates are polished smooth.

[0008] Beneficial effects of the present invention:

[0009] The present invention solves the problem of serious smoke deviation in the second and third flues by arranging a smoke guide device (a double-layer flat guide plate) in the ash hopper of the second and third flues of the waste heat boiler, and cools the temperature of the surrounding sealing steel plate to prevent overheating and carbonization through the inlet and outlet of circulating water on the double-layer flat guide plate. The surface of the double-layer flat guide plate is smooth and free of casting material, which reduces the problem of ash accumulation. The double-layer flat guide plate is placed in the ash hopper of the second and third flue of the boiler to improve the structural stability of the ash hopper of the second and third flue of the boiler, while reducing the smoke temperature, thereby generating energy-saving economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings described herein are used to provide further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute improper limitations on the present invention.

[0011] Figure 1 It is a schematic diagram of the overall structure of a preferred embodiment of the present invention;

[0012] Figure 2 It is a schematic diagram of the positions of the cooling water inlet and the cooling water outlet of the present invention.

[0013] Figure annotation:

[0014] 1-ash hopper of the second and third flues of waste heat boiler, 2-folded plate, 3-round steel, 4-peripheral sealing steel plate, 5-cooling water inlet, 6-cooling water outlet. DETAILED DESCRIPTION

[0015] This section will describe in detail the specific embodiments of the present invention. The preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present invention, but it cannot be understood as a limitation on the scope of protection of the present invention.

[0016] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0017] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0018] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0019] Reference Figure 1-Figure 2 According to a preferred embodiment of the present invention, a water-cooled plate-type flue gas diversion device for a waste incineration boiler comprises a second or third flue ash hopper 1 of a waste heat boiler, wherein the second or third flue ash hopper 1 of the waste heat boiler is provided with a flue gas diversion device, wherein the flue gas diversion device comprises a double-layer flat-plate diversion plate, wherein the double-layer flat-plate diversion plate is arranged according to the angle of the second or third flue ash hopper 1 of the waste heat boiler and the direction of the flue gas flow, and has the best flue gas diversion effect, and the double-layer flat-plate diversion plate is arranged in the second or third flue ash hopper 1 of the waste heat boiler, which can improve the structural stability of the second or third flue ash hopper 1 of the waste heat boiler, and at the same time reduce the flue gas temperature, thereby generating energy-saving and economic benefits.

[0020] Furthermore, the double-layer flat guide plate is a cavity box composed of two parallel folding plates 2 and a peripheral sealing steel plate 4 (preferably, the cavity box needs to undergo a water pressure test to ensure its sealing). Round steel 3 is welded between the folding plates 2 for reinforcing the cavity box.

[0021] Furthermore, a pipe and a flange are provided at the lower part of the side of the double-layer flat guide plate as a cooling water inlet 5, and a cooling water outlet 6 is provided at the upper part of the side of the double-layer flat guide plate. The cooling water inlet 5 and the cooling water outlet 6 are used for the inlet and outlet of cooling circulating water. Specifically, the cooling water enters the double-layer flat guide plate from the lower cooling water inlet 5, absorbs the heat of the surrounding sealing steel plate 4, and is led out from the upper cooling water outlet 6.

[0022] During actual use, cooling water is constantly circulated in the double-layer flat guide plate to reduce the metal surface temperature and prevent the peripheral sealing steel plate 4 from overheating and carbonization.

[0023] Furthermore, the outer surface of the double-layer flat guide plate does not need to be protected by castable material, which minimizes the possibility of dust adhesion; the weld seams on the outer surface of the double-layer flat guide plate are polished smooth, and the accumulated dust can fall freely.

[0024] The present invention solves the problem of serious smoke deviation in the second and third flues by arranging a smoke guide device (double-layer flat guide plate) on the second and third flue ash hopper 1 of the waste heat boiler, and cools the temperature of the surrounding sealing steel plate 4 to prevent overheating and carbonization through the inlet and outlet of circulating water on the double-layer flat guide plate. The surface of the double-layer flat guide plate is smooth and free of casting material, which reduces the problem of ash accumulation. The double-layer flat guide plate is placed in the second and third flue ash hopper 1 of the boiler and can also improve the structural stability of the second and third flue ash hopper 1 of the boiler, while reducing the smoke temperature, thereby generating energy-saving economic benefits.

[0025] Under the premise that no conflict occurs, those skilled in the art may freely combine and superimpose the above-mentioned additional technical features.

[0026] The above description is only a preferred implementation mode of the present invention. Any technical solution that achieves the purpose of the present invention by substantially the same means belongs to the protection scope of the present invention.

Claims

1. A water-cooled plate-type flue gas guide device for a waste incineration boiler, characterized in that: The invention comprises a secondary and tertiary flue ash hopper (1) of a waste heat boiler, wherein a flue gas guide device is arranged in the secondary and tertiary flue ash hopper (1) of the waste heat boiler, wherein the flue gas guide device comprises a double-layer flat plate guide plate, wherein the double-layer flat plate guide plate is a cavity box body composed of two parallel folded plates (2) and a peripheral sealing steel plate (4), and round steel (3) for reinforcing the cavity box body is welded between the folded plates (2); A pipe and a flange are provided at the lower part of the side of the double-layer flat guide plate as a cooling water inlet (5), and a cooling water outlet (6) is provided at the upper part of the side of the double-layer flat guide plate. Circulating cooling water enters the double-layer flat guide plate from the lower cooling water inlet (5), and the circulating water absorbs heat from the surrounding sealing steel plate (4) and is then led out from the upper cooling water outlet (6).

2. A water-cooled plate-type flue gas guide device for a waste incineration boiler according to claim 1, characterized in that: The double-layer flat guide plate is arranged according to the angle of the second and third flue ash hoppers (1) of the waste heat boiler and the direction of the flue gas flow.

3. The water-cooled plate-type flue gas guide device for a waste incineration boiler according to claim 1, characterized in that: The outer surface of the double-layer flat-plate guide plate does not need to be protected by casting material.

4. A water-cooled plate-type flue gas guide device for a waste incineration boiler according to claim 1, characterized in that: The weld seams on the outer surfaces of the double-layer flat-plate guide plates are polished smooth.

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