Chimney bottom structure with cooling function

Abstract

The utility model discloses a chimney bottom structure with a cooling function, a rainwater accumulation plate is arranged in a chimney body, the rainwater accumulation plate is arranged in an inclined mode and abuts against the inner wall of the whole body of the chimney body to divide the chimney body into an upper section and a lower section, the upper section is provided with a smoke inlet, at least one through hole is formed in the side wall of the whole body of the lower section, and the smoke inlet is communicated with the through hole. The outer side wall of the lower section is provided with a barrel communicated with the through hole, a filter screen is arranged on the through hole or in the barrel, and the filter screen covers the through hole along the projection of the central axis. The through hole is communicated with the bottom cavity defined by the lower section of the chimney body, the bottom cavity can be communicated with the outside to form a non-closed space, high-temperature and high-pressure gas accumulated in the bottom cavity can be exhausted in time, and damage to weld joints of the chimney body due to the expansion effect generated by gas expansion in the bottom cavity can be avoided.

Description

Technical Field

[0001] This utility model relates to the field of chimney structure technology, and in particular to a chimney bottom structure with cooling function. Background Technology

[0002] Chimneys are key equipment for exhaust gas emission in the chemical industry and play a crucial role in its operation; therefore, chimney design is particularly important. Currently, chimney design in the industry follows conventional design concepts, neglecting many details, which may affect the efficiency and safety of chimney use and operation.

[0003] During chimney operation, the temperature of the emitted flue gas typically reaches 100℃. Measures must be taken to ensure timely discharge of this high-temperature flue gas and prevent gas accumulation and stagnation. In conventional designs, a sealed space is formed at the bottom of the chimney—the space between the rainwater slab and the chimney foundation. Although no flue gas enters this sealed space, air is present. The high-temperature flue gas transfers its temperature to the rainwater slab through heat transfer, causing the rainwater slab to reach the same temperature as the flue gas. This heat conduction also raises the temperature of the air within the sealed space, leading to an expansion effect on the rainwater slab and the chimney itself. This expansion severely affects the welds of the chimney, inevitably impacting its service life. Utility Model Content

[0004] The purpose of this utility model is to provide a bottom structure of a chimney with a cooling function. The through hole connects to the bottom cavity enclosed by the lower section of the chimney body. The bottom cavity can be connected to the outside to form a non-sealed space. The high temperature and high pressure gas accumulated in the bottom cavity can be discharged in time, which can avoid the expansion effect caused by the gas expansion in the bottom cavity from causing damage to the weld of the chimney body.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a chimney bottom structure with cooling function, comprising a chimney body set on the chimney foundation via a flange structure, a rainwater collection plate provided inside the chimney body, the rainwater collection plate being inclined and abutting against the inner wall of the chimney body to divide the chimney body into an upper section and a lower section, the upper section having a flue gas inlet, the lower section having at least one through hole on its side wall, and the outer side wall of the lower section having a cylinder communicating with the through hole, a filter screen being provided on the through hole or inside the cylinder, the projection of the filter screen along the central axis of the through hole covering the through hole.

[0006] As a further optimization, the filter screen is perpendicular to the central axis of the through hole.

[0007] As a further optimization, the filter screen is disposed on the cylinder.

[0008] As a further optimization, the cylinder is provided with a slit that communicates with its cavity, and the filter screen extends into the cavity after passing through the slit.

[0009] As a further optimization, the slit is located at the top of the cylinder to prevent the filter screen from falling off.

[0010] As a further optimization, a slit is provided on the inner wall of the cylinder on the side opposite to the opening. The filter screen extends into the slit, which can position the filter screen and prevent it from shifting laterally.

[0011] As a further optimization, the filter screen is provided with an extension that extends out of the side wall of the cylinder.

[0012] As a further optimization, the filter screen is made of metal.

[0013] As a further optimization, the number of through holes is two to six, and the multiple through holes are arranged symmetrically along an axis, preferably with four through holes arranged symmetrically.

[0014] As a further optimization, a drain outlet is provided at the bottom end of the rainwater collection plate on the upper section, and the drain outlet is offset from the through hole in the vertical direction.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The through hole connects to the bottom cavity enclosed by the lower section of the chimney body. The bottom cavity can be connected to the outside to form a non-sealed space. The high temperature and high pressure gas accumulated in the bottom cavity can be discharged in time, which can avoid the expansion effect of the gas expansion in the bottom cavity from causing damage to the weld of the chimney body.

[0017] 2. The cylindrical body located at the through hole can prevent rainwater from entering the bottom cavity. The cylindrical body can easily hold the filter screen, preventing dust, insects, etc. from entering the bottom cavity and ensuring the bottom cavity is clean. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the present invention.

[0019] Figure 2 for Figure 1 AA section view in the image.

[0020] Figure 3 This is a schematic diagram of the filter screen of this utility model installed inside the cylinder.

[0021] Figure 4This is a schematic diagram of the structure of the cylinder of this utility model. Detailed Implementation

[0022] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0023] like Figures 1 to 2 As shown, a bottom structure of a chimney with cooling function includes a chimney body 30 mounted on a chimney foundation 10 via a flange structure 20. A rainwater collection plate 33 is provided inside the chimney body 30. The rainwater collection plate 33 is inclined and abuts against the inner wall of the chimney body 30, dividing the chimney body 30 into a lower section 31 and an upper section 32. The upper section 32 is provided with a flue gas inlet for flue gas to enter the chimney body 30 and flow upward to be discharged. At least one through hole 311 is provided on the side wall of the lower section 31, and a cylinder 312 communicating with the through hole 311 is provided on the outer side wall of the lower section 31. A filter screen 313 can be provided on the through hole 311 or inside the cylinder 312. Preferably, the filter screen 313 is provided on the cylinder 312, and the projection of the filter screen 313 along the central axis of the through hole 311 covers the through hole 311.

[0024] In this invention, the through hole 311 connects to the bottom cavity 310 enclosed by the lower section 311, allowing the bottom cavity 310 to connect with the outside and form a non-sealed space. High-temperature and high-pressure gas accumulated in the bottom cavity 310 can be discharged in time through 311, avoiding the damage to the weld of the chimney body 30 caused by the expansion effect of the gas expansion in the bottom cavity 310. Moreover, a cylinder 312 is provided on the lower section 31 at the through hole 311. The cylinder 312 encloses the through hole 311 to form a certain barrier, that is, under changes in the external environment (such as rain), rainwater and other liquids are not easy to enter the bottom cavity 310 in large quantities through the through hole 311, ensuring that the environment inside the bottom cavity 310 is relatively dry. Even if a small amount of rainwater enters the bottom cavity 310, it will evaporate quickly due to the certain temperature inside the bottom cavity 310. Furthermore, by setting up a filter screen 313, dust, insects, and other debris can be prevented from entering the bottom cavity 310 through the cylinder 312 and the through hole 311, thus ensuring a clean environment inside the bottom cavity 310.

[0025] Preferably, the filter screen 313 is perpendicular to the central axis of the through hole 310, which can save the material required for the filter screen 313.

[0026] Combination Figures 3 to 4As shown, in order to facilitate the cleaning of the filter screen 313 after removal and to avoid the filter screen 313 becoming clogged and causing obstruction of gas flow, a slit 3121 communicating with its cavity 3120 can be provided on the cylinder 312. The filter screen 313 extends into the cavity 3120 after passing through the slit 3121. This structural design can quickly realize the removal and installation of the filter screen 313, and the filter screen 313 can be supported by the inner wall of the cavity 3120 after extending into it. This can achieve both stable positioning of the filter screen 313 and quick disassembly and assembly of the filter screen 313.

[0027] Preferably, the slit 3121 is located at the upper part of the cylinder 312, so that the filter screen 313 can be embedded from top to bottom into the slit 3121 and the cavity 3120, which can effectively prevent the filter screen 313 from falling off from the installation position.

[0028] Furthermore, a slit 3122 is provided on the inner wall of the cylinder 312 on the side opposite to the slit 3121. The filter screen 313 extends into the slit 3122. For example, both the slit 3121 and the slit 3122 are semi-circular. The semi-circular structure of the slit 3121 allows the filter screen 313 (such as a circular structure) to be fully embedded in the cylinder 312. The semi-circular structure of the slit 3122 can position the lower part of the filter screen 313 to the maximum extent. Therefore, the lower semi-circular sidewall of the filter screen 313 is fixed by the slit 3122, and the upper semi-circular sidewall is fixed by the slit 3121, thereby stably placing the filter screen 313 on the cylinder 312. Even if there is an impact from an external force (such as the impact of an insect), the filter screen 313 will not shift in position and its stability will be guaranteed.

[0029] To facilitate the removal of the filter screen 313, an extension 3131 can be provided on the filter screen 313. The extension 3131 extends out of the side wall of the cylinder 312. By taking the position of the extension 3131, the filter screen 313 can be easily removed from the cylinder 312.

[0030] In addition, filter 313 is a metal filter, such as a rigid metal filter, which has good structural strength.

[0031] The number of through holes 311 is two to six, and the multiple through holes 311 are arranged symmetrically. For example, if the number of through holes 311 is set to four, the two opposite through holes 311 can form air convection, which is beneficial to releasing the high temperature and high pressure gas in the bottom cavity 310.

[0032] Furthermore, a drain outlet 320 is provided at the bottom of the rainwater collection plate 33 on the upper section 32 to discharge rainwater that falls into the chimney body 30. The drain outlet 320 and the through hole 311 are offset in the vertical direction.

[0033] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A chimney bottom structure having a cooling function, comprising a chimney body provided on a chimney foundation by a flange structure, characterized in that, The chimney body is provided with a rainwater collection plate, which is inclined and abuts against the inner wall of the chimney body, dividing the chimney body into an upper section and a lower section. The upper section is provided with a flue gas inlet, and the lower section is provided with at least one through hole on its side wall. The outer side wall of the lower section is provided with a cylinder that communicates with the through hole. A filter screen is provided on the through hole or inside the cylinder, and the projection of the filter screen along the central axis of the through hole covers the through hole.

2. The chimney base structure having a cooling function according to claim 1, wherein, The filter screen is perpendicular to the central axis of the through hole.

3. The chimney base structure having a cooling function according to claim 1 or 2, characterized in that, The filter screen is disposed on the cylinder.

4. The chimney base structure having a cooling function according to claim 3, wherein The cylinder has a slit that communicates with its cavity, and the filter screen extends into the cavity after passing through the slit.

5. The chimney base structure having a cooling function according to claim 4, wherein The slit is located at the upper part of the cylinder.

6. The chimney base structure having a cooling function according to claim 4 or 5, characterized in that, The inner wall of the cylinder has a slit on the side opposite to the opening, and the filter screen extends into the slit.

7. The chimney base structure having a cooling function according to claim 4, wherein The filter screen has an extension that extends out of the side wall of the cylinder.

8. The chimney base structure having a cooling function according to claim 1, wherein The filter screen is made of metal.

9. The chimney base structure having a cooling function according to claim 1, wherein The number of through holes is two to six, and the multiple through holes are arranged symmetrically along an axis.

10. The chimney base structure having a cooling function according to claim 1 or 9, wherein The upper section is provided with a drain outlet at the bottom end of the rainwater collection plate, and the drain outlet is offset from the through hole in the vertical direction.

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