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

Abstract

The utility model discloses a waste incineration boiler water cooling plate type flue gas guiding device which comprises a waste heat boiler second flue ash hopper and a waste heat boiler third flue ash hopper, a flue gas guiding device is arranged in the waste heat boiler second flue ash hopper and the waste heat boiler third flue ash hopper, and the flue gas guiding device comprises a double-layer flat plate type guiding 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 boiler second and third flue ash bucket solves the problem that flue gas at the second and third flues severely deflects, can prevent peripheral sealing steel plates from being overheated and carbonized, can improve the structural stability of the boiler second and third flue ash bucket by placing the double-layer flat plate type guide plate in the boiler second and third flue ash bucket, reduces the temperature of the flue gas, and generates energy-saving economic benefits.

Description

Technical Field

[0001] The utility model relates to the technical field of boilers, in particular to a water-cooled plate type flue gas diversion device for a waste incineration boiler. Background Technique

[0002] During the operation of a waste incineration waste heat boiler, the problem of flue gas deviation and ash accumulation is particularly prominent in the area where the flue gas makes a 180° turn. Especially at the second and third flues of a vertical waste heat boiler, the ash accumulation at the rear of the furnace extends upward from the ash hopper to the convective heating surface area, and the superheater frequently bursts at the rear wall, seriously affecting the economic and stable operation of the waste heat boiler. According to the flue gas flow field distribution, arranging a deflector at the flue gas turning point can well alleviate the problem of flue gas deviation and ash accumulation. It is found in actual operation that for the deflector made of steel plate, if it is protected by castable, the surface of the castable is rough and the ash accumulation is serious. If it is not protected by castable, the steel plate will quickly dry and carbonize. Content of the Utility Model

[0003] The purpose of the utility model is to solve the technical problems existing in the prior art, and provide a water-cooled plate type flue gas diversion device for a waste incineration boiler.

[0004] To achieve the above purpose, the technical solution provided by the utility model is: a water-cooled plate type flue gas diversion device for a waste incineration boiler, including the ash hopper of the second and third flues of the waste heat boiler. A flue gas diversion device is arranged in the ash hopper of the second and third flues of the waste heat boiler. The flue gas diversion device includes a double-layer flat plate type deflector. The double-layer flat plate type deflector is a cavity box body composed of two parallel folded plates and a surrounding sealing steel plate. Round steel for strengthening the cavity box body is welded between the folded plates. A pipe and a flange are arranged at the lower part of the side surface of the double-layer flat plate type deflector as the cooling water inlet, and a cooling water outlet is arranged at the upper part of the side surface of the double-layer flat plate type deflector. The circulating cooling water enters the double-layer flat plate type deflector from the lower cooling water inlet, and the circulating water absorbs the heat of the surrounding sealing steel plate and is led out from the upper cooling water outlet.

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

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

[0007] Preferably, the weld seams on the outer surface of the double-layer flat plate type deflector are polished smoothly.

[0008] Advantageous Effects of the Utility Model

[0009] The utility model solves the problem of serious gas deviation at the second and third flue gas ducts by arranging a gas diversion device (double-layer flat diversion plate) in the ash hoppers of the second and third flue gas ducts of the waste heat boiler. Moreover, through the inlet and outlet of circulating water on the double-layer flat diversion plate, the temperature of the surrounding sealing steel plates is cooled to prevent overheating and carbonization. The surface of the double-layer flat diversion plate is smooth without castable, reducing the problem of ash accumulation. In addition, placing the double-layer flat diversion plate in the ash hoppers of the second and third flue gas ducts of the boiler can improve the structural stability of the ash hoppers of the second and third flue gas ducts of the boiler, and at the same time reduce the gas temperature, generating energy-saving economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] The drawings described herein are used to provide a further understanding of the utility model and form a part of the utility model. The schematic embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an improper limitation to the utility model.

[0011] Figure 1 is a schematic diagram of the overall structure of the preferred embodiment of the utility model;

[0012] Figure 2 is a schematic diagram of the positions of the cooling water inlet and the cooling water outlet of the utility model.

[0013] Reference Numerals in the Drawings:

[0014] 1 - Ash hopper of the second and third flue gas ducts of the waste heat boiler, 2 - Folding plate, 3 - Round steel, 4 - Surrounding sealing steel plate, 5 - Cooling water inlet, 6 - Cooling water outlet. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] This part will describe in detail the specific embodiments of the utility model. The preferred embodiments of the utility model are shown in the drawings. The role of the drawings is to supplement the description in the text part of the specification, enabling people to intuitively and vividly understand each technical feature and the overall technical solution of the utility model, but it cannot be understood as a limitation to the protection scope of the utility model.

[0016] In the description of the utility model, it should be understood that for the orientation description, such as the orientation or positional relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the utility model.

[0017] In the description of the present utility model, the meaning of "a number of" is one or more, the meaning of "a plurality of" is more than two, and understandings such as "greater than", "less than", and "exceeding" do not include the base number, while understandings such as "above", "below", and "within" include the base number. If there is a description of "first" and "second", it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.

[0018] In the description of the present utility model, unless otherwise clearly defined, terms such as "arrangement", "installation", and "connection" should be understood in a broad sense, and those skilled in the relevant technical field can reasonably determine the specific meanings of the above terms in the present utility model in combination with the specific content of the technical solution.

[0019] Referring to Figure 1 - Figure 2 , a preferred embodiment of the present utility model, a water-cooled plate-type flue gas diversion device for a waste incineration boiler, includes a waste heat boiler secondary and tertiary flue ash hopper 1. A flue gas diversion device is provided inside the waste heat boiler secondary and tertiary flue ash hopper 1. The flue gas diversion device includes a double-layer flat plate-type diversion plate. The double-layer flat plate-type diversion plate is arranged according to the angle of the waste heat boiler secondary and tertiary flue ash hopper 1 and the flue gas flow direction, which has the best flue gas diversion effect. And the double-layer flat plate-type diversion plate is arranged inside the waste heat boiler secondary and tertiary flue ash hopper 1, which can improve the structural stability of the waste heat boiler secondary and tertiary flue ash hopper 1, and at the same time reduce the flue gas temperature, generating energy-saving economic benefits.

[0020] Further, the double-layer flat plate-type diversion plate is a cavity box body composed of two parallel folding plates 2 and a peripheral sealing steel plate 4. (Preferably, the cavity box body needs to pass a hydrostatic test to ensure its sealing performance.) Round steel 3 for strengthening the cavity box body is welded between the folding plates 2.

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

[0022] During specific use, the cooling water continuously circulates in the double-layer flat plate-type diversion plate to reduce the metal surface temperature and prevent the peripheral sealing steel plate 4 from overheating and carbonizing.

[0023] Further, the outer surface of the double-layer flat plate-type diversion plate does not require castable protection, minimizing the possibility of ash accumulation; the outer surface welds of the double-layer flat plate-type diversion plate are polished smoothly, and the ash can fall freely.

[0024] The utility model solves the problem of serious gas deviation at the second and third flue ducts by arranging a gas guiding device (double-layer flat guiding plate) in the ash hoppers 1 of the second and third flue ducts of the waste heat boiler. Through the inlet and outlet of circulating water on the double-layer flat guiding plate, the temperature of the surrounding sealing steel plate 4 is cooled to prevent overheating and carbonization. The surface of the double-layer flat guiding plate is smooth without castable, reducing the ash accumulation problem. Moreover, placing the double-layer flat guiding plate in the ash hoppers 1 of the second and third flue ducts of the boiler can improve the structural stability of the ash hoppers 1 of the second and third flue ducts of the boiler, and at the same time reduce the gas temperature, generating energy-saving economic benefits.

[0025] On the premise of no conflict, those skilled in the art can freely combine and superimpose the above-mentioned additional technical features.

[0026] The above is only the preferred implementation mode of the utility model. As long as the technical solutions that achieve the purpose of the utility model by basically the same means fall within the protection scope of the utility model.

Claims

1. A water-cooled plate type flue gas diversion device for a waste incineration boiler, characterized in that: It includes the ash hopper (1) of the second and third flue ducts of the waste heat boiler. A flue gas diversion device is arranged in the ash hopper (1) of the second and third flue ducts of the waste heat boiler. The flue gas diversion device includes a double-layer flat diversion plate, and the double-layer flat diversion plate is a cavity box body composed of two parallel folded plates (2) and a peripheral sealing steel plate (4). Round steel (3) for strengthening the cavity box body is welded between the folded plates (2). A pipe and a flange are arranged at the lower part of the side surface of the double-layer flat diversion plate as a cooling water inlet (5), and a cooling water outlet (6) is arranged at the upper part of the side surface of the double-layer flat diversion plate. The circulating cooling water enters the double-layer flat diversion plate from the cooling water inlet (5) at the lower part, and the circulating water absorbs the heat of the peripheral sealing steel plate (4) and is led out from the cooling water outlet (6) at the upper part.

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

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

4. A water-cooled plate type flue gas diversion device for a waste incineration boiler according to claim 1, characterized in that: The welds on the outer surface of the double-layer flat diversion plate are polished smoothly.

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