Heating surface structure of waste heat boiler

Abstract

The utility model provides a heating surface structure of a waste heat boiler, which comprises a heating panel, a dust intercepting assembly arranged in the heating panel and comprising a collecting frame and a dust intercepting structure arranged in the collecting frame; the corrosion-resistant coating is arranged on the inner top wall of the heated panel and used for protecting the heated surface from acid corrosion caused by SO; and the connecting assembly is arranged in the heated panel and used for connecting the collecting frame and the heated panel. By arranging the dust intercepting assembly, dust in smoke can be intercepted, it is guaranteed that the content of the dust in the smoke is lower than a preset threshold value, and therefore the dust is prevented from being adsorbed to pollute a heated panel of the waste heat boiler, heat transfer deterioration of the boiler is effectively avoided, by arranging the corrosion-resistant coating, the heated panel can be protected and can be prevented from being corroded by acid caused by SO2, and the service life of the boiler is prolonged. The overall corrosion resistance is remarkably improved, and it is ensured that the heat transfer efficiency is not reduced or the service life is not shortened due to corrosion of the heated panel in the long-term operation process of the waste heat boiler.

Description

Technical Field

[0001] The utility model relates to the technical field of waste heat boilers, in particular to a waste heat boiler heating surface structure. Background Technique

[0002] When rice husks are pyrolyzed, a waste heat boiler is used. The main function of the heating surface structure on the waste heat boiler is to efficiently recover the waste heat energy carried in the flue gas discharged from the boiler tail, transfer this heat to the working medium in the boiler through the heat exchange process, so as to realize the secondary utilization of energy and effectively reduce the heat loss during the smoke exhaust process.

[0003] When rice husks are pyrolyzed, rice husk charcoal and a large amount of by-product biomass gas are produced. The biomass gas flue gas after oxidation combustion belongs to a waste heat heat source with extremely high grade. The main components of the flue gas are mainly N2, O2, CO2, H2O, etc. However, due to the rice husk gasification process and after oxidation combustion, the flue gas will contain a large amount of fine dust, and the dust has extremely strong adsorption, and it is very easy to pollute the heating surface of the waste heat boiler, resulting in the deterioration of boiler heat transfer. There is also a small amount of SO2 in the flue gas, which may also cause a certain degree of acid corrosion to the heat exchange equipment at the tail of the waste heat boiler. Therefore, we provide a waste heat boiler heating surface structure. Content of the Utility Model

[0004] The utility model provides a waste heat boiler heating surface structure, which solves the technical problems that the flue gas contains a large amount of fine dust, the dust has extremely strong adsorption, it is very easy to pollute the heating surface of the waste heat boiler, resulting in the deterioration of boiler heat transfer, and there is also a small amount of SO2 in the flue gas, which may also cause a certain degree of acid corrosion to the heat exchange equipment at the tail of the waste heat boiler.

[0005] The purpose and effect of a waste heat boiler heating surface structure of the utility model are achieved by the following specific technical means: a waste heat boiler heating surface structure, including a heating surface panel:

[0006] A dust interception component, which is arranged inside the heating surface panel and includes a collection frame and a dust interception structure arranged inside the collection frame;

[0007] A corrosion-resistant coating, which is arranged on the inner top wall of the heating surface panel to protect the heating surface from acid corrosion caused by SO;

[0008] A connection component, which is arranged inside the heating surface panel for connecting the collection frame and the heating surface panel.

[0009] Preferably, the dust interception structure of the dust interception component includes a first metal wire mesh and a second metal wire mesh fixedly connected to the inner wall of the collection frame, and the second metal wire mesh is located below the first metal wire mesh.

[0010] Preferably, a diversion cover is fixedly connected to the bottom surface of the collection frame.

[0011] Preferably, two grips are fixedly connected to the bottom surface of the fairing, and a heat insulation layer is provided on the outer surface of each grip.

[0012] Preferably, the corrosion-resistant coating is composed of multiple layers of composite materials, with a metal substrate at the bottom layer, a molybdenum-containing nickel-based alloy at the intermediate layer, and a nano-scale silicon-containing ceramic material at the surface layer.

[0013] Preferably, the connection assembly includes a hanging frame fixedly connected to the inner wall of the heat-receiving panel. Two groups of slots are provided on the upper surface of the hanging frame, and a plug board is inserted into each slot. The bottom end of each plug board is connected to the upper surface of the collection box.

[0014] Preferably, a through groove is provided on the right side surface of each plug board, and a plug block is inserted into each through groove. One ends of the two groups of plug blocks close to each other are respectively fixedly connected to a connecting plate. Electric push rods are installed on the side surfaces of the two connecting plates away from each other, and one ends of the two electric push rods away from each other are connected to the upper surface of the hanging frame.

[0015] Preferably, a sealing frame is provided on the bottom surface of the hanging frame.

[0016] Beneficial effects:

[0017] 1. Through the provided dust interception assembly, the dust in the flue gas can be intercepted, ensuring that the dust content in the flue gas is lower than a predetermined threshold, thereby preventing the dust from adsorbing and polluting the heat-receiving panel of the waste heat boiler, effectively avoiding the deterioration of boiler heat transfer. Through the provided corrosion-resistant coating, the heat-receiving panel can be protected from acid corrosion caused by SO2, significantly improving the overall corrosion resistance and ensuring that the heat-receiving panel of the waste heat boiler will not reduce the heat transfer efficiency or shorten the service life due to corrosion during long-term operation.

[0018] 2. Through the provided connection assembly, it is convenient for the staff to disassemble the dust interception assembly, thereby facilitating the staff to clean the intercepted dust, ensuring the dust interception effect of the dust interception assembly. Through the provided collection box, the flue gas can be guided, ensuring that the flue gas flows through the first metal wire mesh and the second metal wire mesh. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0020] Figure 2 It is a three-dimensional structural schematic diagram of the front cross-sectional view of the heat-receiving panel of the present utility model.

[0021] Figure 3 It is a three-dimensional structural schematic diagram of the front cross-sectional view of the dust interception assembly of the present utility model.

[0022] Figure 4 This is a schematic perspective view of the connection component of the present utility model.

[0023] Figures 1-4 In it, the corresponding relationship between the component names and the drawing numbers is as follows:

[0024] 1. Heating panel; 2. Dust interception component; 201. Collection frame; 202. First metal mesh; 203. Second metal mesh; 204. Deflector; 205. Handle; 3. Corrosion-resistant coating; 4. Connection component; 401. Suspension frame; 402. Slot; 403. Insert plate; 404. Through groove; 405. Insert block; 406. Connection plate; 407. Electric push rod. Specific embodiments

[0025] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0026] First embodiment

[0027] As shown in Figure 1 and Figure 2 and Figure 3 : A waste heat boiler heating surface structure includes a heating panel 1, which can absorb and conduct the heat of the flue gas by using the heating panel 1, and a smoke exhaust channel is arranged on the back of the heating panel 1, which can discharge the hot gas after conducting the heat, so as to ensure the circulation of the flue gas: a dust interception component 2, which is arranged inside the heating panel 1, including a dust interception structure arranged inside the collection frame 201, and the collection frame 201 can play a role in guiding the flue gas.

[0028] The dust interception structure of the dust interception component 2 includes a first metal mesh 202 and a second metal mesh 203 fixedly connected to the inner wall of the collection frame 201, and the second metal mesh 203 is located below the first metal mesh 202. The aperture of the first metal mesh 202 is 50 microns, and the aperture of the second metal mesh 203 is 100 microns. In this way, the dust content in the flue gas can be effectively reduced to 5mg / Nm 3 The following greatly reduces the burden on the subsequent high-temperature flue gas filter, and at the same time reduces the pollution degree of the dust to the heating panel 1.

[0029] The bottom surface of the collection box 201 is fixedly connected with a flow guide cover 204. By using the provided flow guide cover 204, the flue gas can be further guided, so as to ensure that the flue gas passes through the first wire mesh 202 and the second wire mesh 203.

[0030] Two handles 205 are fixedly connected to the bottom surface of the flow guide cover 204. Heat insulation layers are arranged on the outer surfaces of each handle 205. By using the provided handles 205, it is convenient for the staff to hold the flow guide cover 204, so that the collection box 201 can be conveniently moved.

[0031] Second Embodiment

[0032] As shown in the attached Figure 2 figure: A corrosion-resistant coating 3 is arranged on the inner top wall of the heat-receiving panel 1 to protect the heat-receiving surface from acid corrosion caused by SO2. The corrosion-resistant coating 3 is composed of multiple layers of composite materials. The bottom layer is a metal substrate, the middle layer is a molybdenum-containing nickel-based alloy, and the surface layer is a nano-scale silicon-containing ceramic material. The multi-layer structure not only enhances the bonding force between the coating and the heat-receiving panel 1, but also improves the overall corrosion resistance of the coating. Especially for the acid corrosion caused by SO2, it has a significant protective effect, ensuring that the heat-receiving panel 1 of the waste heat boiler will not reduce the heat transfer efficiency or shorten the service life due to corrosion during long-term operation.

[0033] Third Embodiment

[0034] As shown in the attached Figure 1 and the attached Figure 2 and the attached Figure 4 figure: A connection assembly 4 is arranged inside the heat-receiving panel 1 for connecting the collection box 201 and the heat-receiving panel 1. The connection assembly 4 includes a hanging frame 401 fixedly connected to the inner wall of the heat-receiving panel 1. Two groups of slots 402 are opened on the upper surface of the hanging frame 401. An insertion plate 403 is inserted into each slot 402. The bottom end of each insertion plate 403 is connected to the upper surface of the collection box 201. When the insertion plate 403 is inserted into the slot 402, a connection and positioning are formed between the collection box 201 and the hanging frame 401, ensuring the position of the collection box 201 on the heat-receiving panel 1.

[0035] A through groove 404 is opened on the right side surface of each insertion plate 403. An insertion block 405 is inserted into each through groove 404. The mutually close ends of the two groups of insertion blocks 405 are respectively and jointly fixedly connected with a connection plate 406. Electric push rods 407 are installed on the mutually far sides of the two connection plates 406. The mutually far ends of the two electric push rods 407 are connected to the upper surface of the hanging frame 401. When the electric push rods 407 contract, the connection plate 406 will push the insertion block 405 into the through groove 404, thus forming the stability of the collection box 201. When the electric push rods 407 extend, the connection plate 406 pulls the insertion block 405 out of the through groove 404, so that the collection box 201 can be conveniently disassembled.

[0036] A sealing frame is provided on the bottom surface of the hanging frame 401. The sealing frame can be used to seal the space between the collection frame 201 and the hanging frame 401, further ensuring the sealing effect.

[0037] Working principle: When this device is in use, first, the flue gas is preliminarily purified by the dust interception component 2. The second wire mesh 203 intercepts dust with larger particle sizes, while the first wire mesh 202 further captures dust with smaller particle sizes, ensuring that the dust content in the flue gas before entering the next stage of treatment is lower than a predetermined threshold, thus effectively avoiding dust adsorption and pollution of the heating panel 1 of the waste heat boiler. The flue gas after pretreatment will then contact the heating panel 1. At the same time, the corrosion-resistant coating 3 protects the heating panel 1, enabling it to be protected from acid corrosion caused by SO2, significantly improving the overall corrosion resistance, and ensuring that the heating panel 1 of the waste heat boiler will not reduce the heat transfer efficiency or shorten the service life due to corrosion during long-term operation.

Claims

1. A heating surface structure of a waste heat boiler, characterized in that: Comprising a heating panel (1): A dust interception component (2) is arranged inside the heated panel (1), comprising a collection frame (201) and a dust interception structure arranged inside the collection frame (201); A corrosion-resistant coating (3) is disposed on the inner top wall of the heated panel (1) to protect the heated surface from acid corrosion caused by SO2; A connecting component (4) is arranged inside the heated panel (1) and is used to connect the collecting frame (201) and the heated panel (1).

2. The heating surface structure of the waste heat boiler according to claim 1 is characterized in that: The dust interception structure of the dust interception assembly (2) comprises a first metal wire mesh (202) and a second metal wire mesh (203) fixedly connected to the inner wall of the collection frame (201), and the second metal wire mesh (203) is located below the first metal wire mesh (202).

3. The heating surface structure of the waste heat boiler according to claim 1 is characterized in that: The bottom surface of the collecting frame (201) is fixedly connected with a flow guide cover (204).

4. The heating surface structure of the waste heat boiler according to claim 3 is characterized in that: Two handles (205) are fixedly connected to the bottom surface of the air deflector (204), and a heat insulation layer is provided on the outer surface of each handle (205).

5. The heating surface structure of the waste heat boiler according to claim 4, characterized in that: The corrosion-resistant coating (3) is composed of a multi-layer composite material, wherein the bottom layer is a metal substrate, the middle layer is a molybdenum-containing nickel-based alloy, and the surface layer is a nano-scale silicon-containing ceramic material.

6. The heating surface structure of the waste heat boiler according to claim 1, characterized in that: The connection assembly (4) comprises a hanging frame (401) fixedly connected to the inner wall of the heated panel (1); the upper surface of the hanging frame (401) is provided with two groups of slots (402); a plug-in board (403) is plugged into the interior of each of the slots (402); and the bottom end of each of the plug-in boards (403) is connected to the upper surface of the collection frame (201).

7. The heating surface structure of the waste heat boiler according to claim 6, characterized in that: A through slot (404) is provided on the right side of each plug plate (403), and a plug block (405) is inserted into the interior of each through slot (404). The ends of the two groups of plug blocks (405) close to each other are fixedly connected to a connecting plate (406) respectively, and the sides of the two connecting plates (406) away from each other are installed with electric push rods (407), and the ends of the two electric push rods (407) away from each other are connected to the upper surface of the hanging frame (401).

8. The heating surface structure of the waste heat boiler according to claim 6, characterized in that: A sealing frame is provided on the bottom surface of the hanging frame (401).

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