A kind of waste heat boiler bottom catch basin anti-blocking grid device

Abstract

The utility model belongs to the technical field of grating, concretely is a kind of waste heat boiler bottom water collecting tank anti-blocking grating device.The device is located on the upper portion of waste heat boiler bottom water collecting tank, including grating main body and the conical pipe cap fixed in the top of grating main body, the grating main body is a vertically arranged steel pipe, along its axial direction from top to bottom is divided into coaxial first grating section and second grating section;The first grating section is provided with multiple layers along the axial direction, each layer is provided with a plurality of vertical slits in the circumferential direction of steel pipe, and the annular steel plate belt integrally formed between adjacent two layers is provided;The second grating section is provided with four vertical slits equidistantly in the circumferential direction of steel pipe;The bottom of second grating section is connected with waste heat boiler by flange;The utility model can guarantee the passability of different particle sizes of coal block, coal powder and other foreign matters, avoid blocking pipeline and conical bottom small space, while giving consideration to the bearing capacity when pressure difference is larger, not easy to be extruded deformation.

Description

Technical Field

[0001] This utility model belongs to the field of bar grid technology, specifically a bar grid device for preventing blockage of the bottom water collection tank of a waste heat boiler. Background Technology

[0002] In the production process of the Saiding gasifier, the crude coal gas escapes from the top of the waste heat boiler and immediately enters the gas-liquid separator. Inside the separator, the gas-water mixture entrained in the crude coal gas is effectively separated, and the resulting gas-water mixture flows back to the water collection tank at the bottom of the waste heat boiler. Subsequently, the dust-laden gas-water mixture discharged from the waste heat boiler water collection tank is transported to a specialized gas-water separation device for further processing.

[0003] However, the exhaust gas often carries a large amount of moisture, as well as chemical substances such as coal tar, benzene, and phenol, and solid impurities such as light coal dust and small coal particles. The presence of these substances makes it easy for coal tar and coal dust particles to accumulate in the water collection trough at the bottom of the waste heat boiler. If the gasifier's operating conditions malfunction, or if changes in coal quality lead to an increase in carryover material, the grid at the bottom of the water collection trough is prone to blockage. Once the grid is blocked, the liquid level in the water collection trough will continuously rise, preventing normal discharge and thus blocking the gas flow path. Ultimately, this will cause gas blockage and pressure buildup in the gasifier, forcing a production shutdown to clean the water collection trough. Utility Model Content

[0004] This utility model provides a grid device for preventing blockage of the bottom water collection tank of a waste heat boiler, in order to solve the technical problems in the prior art where the bottom water collection tank of a waste heat boiler is blocked due to the increase of material carried out from the gasifier outlet. When the bottom water collection tank of a waste heat boiler is blocked, the bottom grid is deformed due to compression and the water level in the collection tank cannot be automatically controlled, resulting in frequent manual adjustments, which consumes manpower and affects the safe operation of the gasifier.

[0005] To solve the above problems, this utility model provides a grid device for preventing blockage of the bottom water collection tank of a waste heat boiler. The device adopts the following technical solution: A grid device for preventing blockage of the bottom water collection tank of a waste heat boiler is provided. The device is located on the upper part of the bottom water collection tank of the waste heat boiler. The device includes a grid body and a conical pipe cap fixed to the top of the grid body. The grid body is a vertically arranged steel pipe, which is divided into a coaxial first grid section and a second grid section from top to bottom along its axial direction. The first grid section has multiple layers along the axial direction. Each layer has several vertical slits with the same height as the first grid section in the circumferential direction of the steel pipe, and an integrally formed annular steel plate strip is provided between adjacent layers. The second grid section has four vertical slits with the same height as the second grid section in the circumferential direction of the steel pipe. The bottom of the second grid section is connected to the waste heat boiler through a flange, and the flange is fixedly connected to the bottom of the second grid section.

[0006] Furthermore, an integrally formed annular steel strip is provided between the bottom of the cap and the top of the first grid segment.

[0007] Furthermore, an integrally formed annular steel strip is provided between the bottom of the first grid segment and the top of the second grid segment.

[0008] Furthermore, the flange is fastened to the waste heat boiler using bolts.

[0009] Furthermore, the steel pipe is a carbon steel pipe with a diameter of 200 mm and a wall thickness of 10 mm.

[0010] The beneficial effects of this utility model are: (1) This utility model sets different widths of gap spacing to achieve the passage of particles of different sizes.

[0011] (2) This utility model has gaps of different widths and supports between different layers. After setting, it ensures good passage in actual use and provides sufficient pressure strength, so as to achieve the purpose of not being squeezed and deformed under large pressure difference.

[0012] (3) This utility model can reduce pollution and is environmentally friendly; at the same time, it can also alleviate labor intensity, reduce safety risks, and avoid accidents. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a plan view of the present invention. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0016] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model; the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium; it can be a connection within two components. For those skilled in the art, the specific meaning of the above terms in this utility model can be understood according to the specific circumstances.

[0017] The technical solution provided in this application will now be described in detail with reference to the accompanying drawings.

[0018] like Figure 1 As shown, this utility model provides a grid device for preventing clogging of the bottom water collection tank of a waste heat boiler. The device is located at the upper inlet of the bottom water collection tank of the waste heat boiler and is used to filter and guide liquid impurities flowing into the water collection tank, preventing impurities from clogging the tank. The device includes a pipe cap 1 and a grid body 2, wherein the grid body 2 is a vertically arranged hollow steel pipe, which is divided into a coaxial first grid section 21 and a second grid section 22 from top to bottom along its axial direction.

[0019] The cap 1 is conical and fixedly connected to the top of the grid body 2. The cap 1 is made of a high-temperature resistant, corrosion-resistant, and wear-resistant material, such as 316L stainless steel, to guide the liquid and impurities to flow along the inclined surface of the cap 1 and prevent impurities from accumulating at the top of the grid. An integrally formed annular steel plate strip 3 is provided between the bottom of the cap 1 and the top of the first grid section 21.

[0020] The first grid section 21 is the upper filtration area of ​​the grid body 2, and is divided into three layers along the axial direction. An integrally formed annular steel plate strip 3 is provided between adjacent layers to improve the overall structural strength of the device. Each layer of the first grid section 21 has several vertical slots with the same height as the first grid section 21 cut around the circumference of the steel pipe. The slots are cut or welded.

[0021] The second grid section 22 is the lower connection and auxiliary filtration area of ​​the grid body 2. It is coaxially arranged with the first grid section 21. An integrally formed annular steel plate strip 3 is provided between the bottom of the first grid section 21 and the top of the second grid section 22, which further enhances the structural integrity and strength of the grid body 2. The second grid section 22 has four vertical gaps of equal height to the second grid section 22 circumferentially opened on the steel plate.

[0022] The bottom of the second grid section 22 is welded and fixed to the flange 5, and the flange 5 is connected and fastened to the waste heat boiler by bolts 4.

[0023] In this embodiment, the steel pipe is a carbon steel pipe with a diameter of 200 mm and a wall thickness of 10 mm, and the height of the pipe cap 1 is 100 mm; the height of each layer of the first grid section 21 is 120 mm, the height of the second grid section 22 is 300 mm, and the width of the annular steel plate strip 3 is 30 mm; the width of each gap in the first grid section 21 and the second grid section 22 is 16 mm, and the spacing between the gaps in the first grid section 21 is 40 mm.

[0024] During the operation of the waste heat boiler, the gas and water need to flow back to the water collection tank at the bottom of the waste heat boiler. First, they come into contact with the conical cap 1 at the top of the grid device. Under the guiding effect of the cap 1, the gas and water are evenly dispersed along the inclined surface of the cap 1 to the circumferential gaps of the first grid section 21. The multiple vertical gaps of the first grid section 21 filter solid impurities. Impurities with a diameter greater than 16 mm are blocked outside the grid and slide down the grid surface under the scouring action of the gas and water flow. Impurities with a diameter less than 16 mm enter the grid body with the gas and water through the gaps of the first grid section, and then flow smoothly into the water collection tank after secondary guidance by the second grid section.

[0025] The above are merely embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A grid device for preventing blockage in the bottom water collection tank of a waste heat boiler, the device being installed at the upper part of the bottom water collection tank of the waste heat boiler, characterized in that, The device includes a grid body and a conical tube cap fixed to the top of the grid body. The grid body is a vertically arranged steel pipe, which is divided into a first grid section and a second grid section along its axial direction from top to bottom. The first grid section has multiple layers along the axial direction. Each layer has several vertical slits with the same height as the first grid section in the circumferential direction of the steel pipe, and an integrally formed annular steel plate strip is provided between adjacent layers. The second grid section has four vertical slits with the same height as the second grid section in the circumferential direction of the steel pipe. The bottom of the second grid section is connected to the waste heat boiler through a flange, and the flange is fixedly connected to the bottom of the second grid section.

2. The grid device for preventing blockage of the bottom water collection tank of a waste heat boiler according to claim 1, characterized in that, An integrally formed annular steel plate strip is provided between the bottom of the pipe cap and the top of the first grid section.

3. The grid device for preventing blockage of the bottom water collection tank of a waste heat boiler according to claim 1, characterized in that, An integrally formed annular steel strip is provided between the bottom of the first grid segment and the top of the second grid segment.

4. The grid device for preventing blockage of the bottom water collection tank of a waste heat boiler according to claim 1, characterized in that, The flange is fastened to the waste heat boiler by bolts.

5. The grid device for preventing blockage of the bottom water collection tank of a waste heat boiler according to claim 1, characterized in that, The steel pipe is a carbon steel pipe with a diameter of 200 mm and a wall thickness of 10 mm.

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