Flue gas drainage device for boiler heating surface
By installing a flue gas drainage device supporting steel plates and flow blocking plates on the boiler heating surface, the problem that flue gas is difficult to drain to the heated surface that is easy to inspect is solved, and the effect of facilitating routine maintenance and improving inspection quality is achieved.
Patent Information
- Application Number
- CN202420412013.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-04
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-03-04
AI Technical Summary
During the combustion process of the boiler, it is difficult to drain the flue gas to the heated surface that is easy to inspect, which makes routine maintenance difficult, expensive, and difficult to conduct comprehensive inspections.
A flue gas drainage device for the heating surface of the boiler is designed, including a support steel plate and a flow blocking plate. The edge of the support steel plate is equipped with a mounting groove consistent with the cross-section of the vertical pipe, and is fixed to the side wall of the vertical pipe. The flow blocking plate is provided with a slope to direct the flue gas flowing to the pipe screen to the heated surface.
Through the drainage device, the flue gas is directed to the heated surface that is easy to inspect, which facilitates routine four-pipe wear-proof inspection, improves inspection quality, and avoids excessive wear in areas that are difficult to inspect.
Smart Images
Figure CN222560053U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of boilers, in particular to a smoke drainage device for a boiler heating surface. Background Art
[0002] The heating surface of the boiler in the vertical flue is arranged compactly, especially near the surrounding wall.
[0003] In the existing technology, during the combustion process of the boiler, a large amount of flue gas enters the tube screen which is difficult to inspect. Due to the deep location of the pipeline components and the narrow inspection space, it is difficult to carry out a comprehensive inspection during the regular maintenance period. The level maintenance construction is difficult and costly, which brings great difficulties to the wear and explosion prevention of the four tubes of the boiler. Utility Model Content
[0004] In order to solve the above technical problems, the utility model provides a boiler heating surface smoke drainage device.
[0005] The technical solution adopted by the utility model to solve the technical problem is: a boiler heating surface flue gas drainage device in the present application comprises a supporting steel plate, the edge of the supporting steel plate is provided with a mounting groove having the same cross-sectional shape as the vertical pipe, the mounting groove of the supporting steel plate is clamped on the side wall of the vertical pipe, and is fixedly connected to the side wall of the vertical pipe;
[0006] The support steel plate is provided with a baffle plate for guiding flow, and the top of the baffle plate is provided with a slope surface for guiding the flue gas flowing toward the tube panel to the heated surface.
[0007] In one embodiment of the present application, a plurality of V-shaped pins are welded to the support steel plate, and the spoiler is cast and fixed to the support steel plate and the V-shaped pins.
[0008] In one embodiment of the present application, the mounting groove of the supporting steel plate is fixed to the side wall of the vertical pipe by welding.
[0009] In one embodiment of the present application, the thickness of the supporting steel plate is 5 mm.
[0010] In one embodiment of the present application, the material of the V-shaped pin is 12Cr1MoVG.
[0011] In one embodiment of the present application, the angle between the slope and the plate surface of the supporting steel plate 1 is greater than 30°.
[0012] Beneficial effects of the utility model: A flue gas drainage device for the heating surface of a boiler in the present application comprises a supporting steel plate, the edge of the supporting steel plate is provided with a mounting groove that is consistent with the cross-sectional shape of the vertical pipe, the mounting groove of the supporting steel plate is clamped on the side wall of the vertical pipe and fixedly connected to the side wall of the vertical pipe; a baffle for drainage is provided on the supporting steel plate, and a slope is provided on the top of the baffle for guiding the flue gas flowing toward the tube panel to the heating surface. The present application fixes the supporting steel plate in the vertical pipe in the vertical shaft flue, and arranges a baffle on the supporting steel plate, and the slope on the baffle changes the direction of the flue gas. The flue gas that originally flows toward the tube panel is directed to the heating surface. The heating surface is easier to inspect than the tube panel, so the present application facilitates conventional four-tube anti-wear inspections, improves the inspection quality, and avoids excessive wear of the heating surface in difficult-to-inspect areas. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 This is a schematic structural diagram of a supporting steel plate of a flue gas drainage device for a boiler heating surface of the present application;
[0014] Figure 2 This is a schematic diagram of the installation structure of a supporting steel plate of a flue gas drainage device for a boiler heating surface of the present application;
[0015] Figure 3 This is a schematic structural diagram of a boiler heating surface flue gas drainage device in this application;
[0016] Figure 4 This is a drainage schematic diagram of a flue gas drainage device for a boiler heating surface in this application;
[0017] The reference numerals are as follows:
[0018] 1-support steel plate, 11-installation groove, 2-spoiler, 3-V-shaped pin. DETAILED DESCRIPTION
[0019] The following will describe the implementation methods of the present application with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present application from the contents disclosed in this specification. The present application can also be implemented or applied through other different specific implementation methods, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present application. It should be understood that the preferred embodiments are only for illustrating the present application, not for limiting the scope of protection of the present application.
[0020] It should be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present application, and thus the drawings only show components related to the present application rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed at will, and the component layout may also be more complicated.
[0021] The inventors found that the heating surface of the boiler in the vertical shaft flue is arranged compactly, so when the boiler is running, the flue gas will enter the tube screen below the vertical shaft, which is difficult to inspect. The conventional four-tube anti-wear inspection in this area is difficult and labor-intensive. It is impossible to effectively achieve full coverage and conduct a thorough inspection in a regular time.
[0022] The purpose of this application is to add drainage devices to the upper, middle and lower three groups of front walls, middle partition walls and rear walls on the heating surface of the boiler shaft flue to divert the flue gas to the heating surface of the area that is easy to inspect, facilitate conventional four-tube anti-wear inspection, improve the inspection quality and avoid excessive wear of the heating surface in difficult-to-inspect areas.
[0023] The specific structure and principle of the drainage device of the present application are as follows:
[0024] Example
[0025] like Figure 1-Figure 2 As shown, a boiler heating surface flue gas drainage device in the present application comprises a supporting steel plate 1, the edge of the supporting steel plate 1 is provided with a mounting groove 11 having the same cross-sectional shape as the vertical pipe, and the mounting groove 11 of the supporting steel plate 1 is clamped on the side wall of the vertical pipe and fixedly connected to the side wall of the vertical pipe;
[0026] The support steel plate 1 is provided with a baffle plate 2 for guiding flow, and the top of the baffle plate 2 is provided with a slope surface for guiding the flue gas flowing toward the tube panel to the heated surface.
[0027] A plurality of V-shaped pins 3 are welded to the support steel plate 1 , and the spoiler 2 is cast and fixed to the V-shaped pins 3 on the support steel plate 1 .
[0028] The mounting groove 11 of the supporting steel plate 1 is fixed to the side wall of the vertical pipe by welding.
[0029] The thickness of the support steel plate 1 is 5 mm. Specifically, in this embodiment, multiple groups of drainage devices are arranged on the heating surface of the shaft. The support steel plates of the drainage devices in the upper and middle groups of the heating surface are made of 1Cr18Ni9Ti, and the support steel plates in the lower group of the heating surface are made of carbon steel. The radius of the pipe with the same specification and size as the corresponding wall-wrapped pipe is made into a semicircular arc, and the interval of the semicircular arc is consistent with the interval of the corresponding wall-wrapped pipe.
[0030] The material of the V-shaped pin 3 is 12Cr1MoVG. In this application, the V-shaped pin (material 12Cr1MoVG) is spot welded at the root of the semicircular arc. The supporting steel plate 1 and the V-shaped pin 3 are cast with a casting material, and the angle from the wall to the edge of the supporting steel plate 1 is cast to a slope of ≥30°. So that the angle between the slope surface and the plate surface of the supporting steel plate 1 is greater than 30°.
[0031] In this embodiment, a flue gas drainage device for the heating surface at the rear of the boiler is provided to guide the flue gas to the heating surface surface which is easy to inspect in the area, thereby preventing a large amount of flue gas from entering the tube screen which is difficult to inspect, and facilitating conventional four-tube anti-wear inspection; the drainage device and the wall sealing device have good sealing effect and are reliable to use. It has the advantages of simple and convenient installation and low cost, and improves the efficiency of conventional construction anti-wear inspection.
[0032] A flue gas drainage device for the heating surface of a boiler in the present application includes a supporting steel plate, the edge of which is provided with a mounting groove that is consistent with the cross-sectional shape of the vertical pipe, the mounting groove of the supporting steel plate is clamped on the side wall of the vertical pipe and fixedly connected to the side wall of the vertical pipe; a baffle for drainage is provided on the supporting steel plate, and a slope is provided on the top of the baffle for guiding the flue gas flowing toward the tube panel to the heating surface. The present application fixes a supporting steel plate in the vertical pipe in the vertical shaft flue, and arranges a baffle on the supporting steel plate, and the slope on the baffle changes the direction of the flue gas. The flue gas that originally flows toward the tube panel is directed to the heating surface. The heating surface is easier to inspect than the tube panel, so the present application facilitates conventional four-tube anti-wear inspections, improves the inspection quality, and avoids excessive wear of the heating surface in difficult-to-inspect areas.
[0033] The above embodiments are merely illustrative of the principles and effects of the present application, and are not intended to limit the present application. Anyone familiar with the technology may modify or change the above embodiments without violating the spirit and scope of the present application. Therefore, all equivalent modifications or changes made by a person of ordinary skill in the art without departing from the spirit and technical ideas disclosed in the present application shall still be covered by the claims of the present application.
Claims
1. A flue gas drainage device for a boiler heating surface, characterized in that: It comprises a supporting steel plate (1), the edge of the supporting steel plate (1) is provided with a mounting groove (11) having the same cross-sectional shape as the vertical pipe, the mounting groove (11) of the supporting steel plate (1) is clamped on the side wall of the vertical pipe and is fixedly connected to the side wall of the vertical pipe; The support steel plate (1) is provided with a baffle plate (2) for guiding flow, and the top of the baffle plate (2) is provided with a slope surface for guiding the flue gas flowing toward the tube panel to the heated surface.
2. A boiler heating surface flue gas drainage device according to claim 1, characterized in that: The support steel plate (1) is welded with a plurality of V-shaped pins (3), and the spoiler (2) is cast and fixed on the support steel plate (1) together with the V-shaped pins (3).
3. A boiler heating surface flue gas drainage device according to claim 1, characterized in that: The mounting groove (11) of the supporting steel plate (1) is fixed to the side wall of the vertical pipe by welding.
4. A boiler heating surface flue gas drainage device according to claim 1, characterized in that: The thickness of the supporting steel plate (1) is 5 mm.
5. A boiler heating surface flue gas drainage device according to claim 2, characterized in that: The material of the V-shaped pin (3) is 12Cr1MoVG.
6. A boiler heating surface flue gas drainage device according to claim 1, characterized in that: The angle between the slope surface and the plate surface of the supporting steel plate (1) is greater than 30°.