A stabilizing internal support structure for a chemical plant sour pre-reformer

Abstract

The utility model discloses a kind of internal support structure of stabilizing chemical industry acid pre-reformer, including big column, small column, L type support rod, annular steel plate, cylindrical sleeve and circular steel bottom plate;Circular steel bottom plate is fixedly installed on the lower gas chamber bottom plate of pre-reformer;Cylindrical sleeve is fixedly installed on circular steel bottom plate;The top end of big column is fixedly installed on the top plate of pre-reformer, and lower end is suspended and arranged in cylindrical sleeve;L type support rod is installed upside down, vertical beam bottom is fixedly installed on circular steel bottom plate, and crossbeam points to big column;Annular steel plate is fixedly installed on big column, and between the crossbeam of L type support rod and the top of cylindrical sleeve;Small column is at least provided with three, and is distributed on the outside of circular steel bottom plate.The utility model can stabilize pre-reformer internal support, prevent steel structure support in barrel body from deformation due to long-term in high temperature environment, destroy barrel body internal stability, cause steel grating to tilt or collapse and other problems.

Description

Technical Field

[0001] This utility model belongs to the technical field of chemical acid production equipment, specifically relating to an internal support structure for a stable chemical acid pre-converter. Background Technology

[0002] In the field of chemical acid production, the pre-converter, as the core equipment for converting high-concentration SO2 flue gas, has long been constrained by the thermal deformation of its internal structure, including the bottom plate, supporting columns, and steel grating, which significantly impacts the stability and service life of the unit. Pre-converters typically operate under harsh conditions of high temperature (390–650℃), high pressure (0.1–1.0 MPa), and the presence of acidic gases containing SO2 and SO3. Large temperature differences within the catalyst layer, high gas flow rates, and mismatched thermal expansion coefficients lead to localized thermal stress concentrations. In particular, the large columns supporting the pre-converter cylinder, which penetrate the upper and lower gas chambers and the catalyst layer, are particularly problematic. Originally, stiffening plates were welded to the bottom of the steel grating at the contact point between the large columns and the grating, providing support. Thermal deformation causes the large columns to tilt laterally, losing their supporting function and compressing the steel grating, resulting in localized catalyst collapse. Longitudinal deformation causes the large columns to stretch upwards, gradually making the bottom plate of the lower gas chamber uneven under varying degrees of tension, affecting the stability of the remaining columns in the lower gas chamber and simultaneously causing catalyst collapse, ultimately impacting the sulfur trioxide conversion rate. Currently, the internal deformation of the cylinder caused by complex flue gas flow field and sudden changes in heat load has become a key bottleneck restricting the adaptability to high-concentration, large-volume flue gas and the long-term operation of the equipment. Utility Model Content

[0003] The purpose of this invention is to provide a stable internal support structure for a chemical acid pre-converter. This support structure stabilizes the internal support of the pre-converter, effectively preventing deformation of the steel structure support inside the cylinder due to prolonged exposure to high temperatures. This prevents deformation that could compromise the internal stability of the cylinder, leading to problems such as tilting or collapse of the steel grating, damage to the catalyst layer, and reduced conversion efficiency.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: An internal support structure for a stabilized chemical acid production pre-converter includes a large column, small columns, L-shaped support rods, an annular steel plate, a cylindrical sleeve, and a circular steel base plate. The circular steel base plate is fixedly installed on the bottom steel plate of the lower gas chamber of the pre-converter. The cylindrical sleeve is fixedly installed on the circular steel base plate. The top of the large column is fixedly installed on the top steel plate of the pre-converter, and the lower end is suspended inside the cylindrical sleeve. The L-shaped support rod is installed upside down, with the bottom of its vertical beam fixedly installed on the circular steel base plate outside the cylindrical sleeve, and the horizontal beam of the L-shaped support rod pointing towards the large column. The annular steel plate is fixedly installed on the large column and located between the horizontal beam of the L-shaped support rod and the top of the cylindrical sleeve. At least three small columns are provided, evenly distributed on the outside of the circular steel base plate. The bottom of the small columns is fixedly installed on the bottom steel plate of the lower gas chamber of the pre-converter, and the top supports the steel grating of the pre-converter.

[0005] In this invention, a large column is suspended, and a cylindrical sleeve is added to the bottom of the large column as a movable limiter to prevent deformation of the pre-converter base plate when the large column deforms and moves upward. A ring-shaped steel plate is installed on the large column, and L-shaped support rods are installed around the large column, with the crossbeams of the L-shaped support rods intersecting the ring-shaped steel plate, leaving an expansion distance in the middle to restrict the upward movement space of the large column. Several small columns are erected around the large column to replace the original large column and serve as supports for the steel grating. The circular steel base plate needs to be installed on the bottom support beam of the pre-converter to provide sufficient support.

[0006] This invention further illustrates that at least two L-shaped support rods are provided, evenly distributed on the outer side of the cylindrical sleeve. The crossbeams of the L-shaped support rods are evenly distributed above the annular steel plate, which can effectively limit the movement of the annular steel plate.

[0007] This invention further illustrates that the outer surface of the cylindrical sleeve is also provided with a triangular steel plate. The triangular steel plate connects the cylindrical sleeve to the circular steel base plate, improving the stability of the cylindrical sleeve.

[0008] This utility model further illustrates that the vertical distance between the bottom end of the large column and the upper edge of the cylindrical sleeve is 150-200mm; the vertical distance between the bottom surface of the annular steel plate and the upper edge of the cylindrical sleeve is 100-200mm; and the vertical distance between the top surface of the annular steel plate and the crossbeam of the L-shaped support rod is 30-50mm. By limiting the reasonable gap distance, effective expansion space can be reserved for the expansion and upward movement of the large column.

[0009] Compared with the prior art, the present invention has the following beneficial effects: 1. This utility model restricts the lateral deformation of the large column. The large column only deforms within the limited space of the bottom limiter, without causing significant disturbance to the middle steel grid layer, thus protecting the stability of the steel grid layer and reducing the probability of catalyst collapse.

[0010] 2. This utility model restricts the longitudinal deformation of the large column. The upward deformation space of the large column is limited to the expansion distance between the upper crossbeam of the L-shaped support and the annular steel plate. This ensures that the longitudinal deformation of the large column does not affect the bottom steel plate of the air chamber, thus guaranteeing the flatness of the bottom steel plate of the air chamber and improving the stability of each supporting column (large column and small column) of the air chamber.

[0011] 3. This utility model separates the large column from the steel grid, and the steel grid is supported by the newly added small column, which greatly reduces the impact of the deformation of the large column on the steel grid. Attached Figure Description

[0012] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0013] Attached reference numerals: 1-Large column, 2-Small column, 3-L-shaped support rod, 4-Ring steel plate, 5-Cylindrical sleeve, 6-Triangular steel plate, 7-Circular steel base plate. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings.

[0015] Example 1: See Figure 1 An internal support structure for a stable chemical acid production pre-converter includes a large column 1, a small column 2, an L-shaped support rod 3, an annular steel plate 4, a cylindrical sleeve 5, and a circular steel base plate 7. The circular steel base plate 7 is welded (segmentally welded) to the bottom steel plate of the lower gas chamber of the pre-converter. The cylindrical sleeve 5 is welded (fully welded) to the circular steel base plate 7. The top of the large column 1 is welded to the top steel plate of the pre-converter, and its lower end is suspended inside the cylindrical sleeve 5. The L-shaped support rod 3... The L-shaped support rod 3 is installed upside down. The bottom of the vertical beam of the L-shaped support rod 3 is welded to the circular steel base plate 7 on the outside of the cylindrical sleeve 5. The horizontal beam of the L-shaped support rod 3 points towards the large column 1. The annular steel plate 4 is welded (fully welded) to the large column 1 and is located between the horizontal beam of the L-shaped support rod 3 and the top of the cylindrical sleeve 5. There are four small columns 2, which are evenly distributed on the outside of the circular steel base plate 7. The bottom of the small columns 2 is welded to the bottom steel plate of the lower air chamber of the pre-converter, and the top supports the steel grating of the pre-converter.

[0016] Four L-shaped support rods 3 are provided, evenly distributed on the outer side of the cylindrical sleeve 5. A triangular steel plate 6 is also provided on the outer surface of the cylindrical sleeve 5. The vertical distance between the bottom end of the large column 1 and the upper edge of the cylindrical sleeve 5 is 180mm; the vertical distance between the bottom surface of the annular steel plate 4 and the upper edge of the cylindrical sleeve 5 is 150mm; and the vertical distance between the top surface of the annular steel plate 4 and the crossbeam of the L-shaped support rod 3 is 40mm.

[0017] Example 2: An internal support structure for a stabilized chemical acid production pre-converter, comprising a large column 1, a small column 2, an L-shaped support rod 3, an annular steel plate 4, a cylindrical sleeve 5, and a circular steel base plate 7; the circular steel base plate 7 is welded (segmentally welded) to the bottom steel plate of the lower gas chamber of the pre-converter; the cylindrical sleeve 5 is welded (fully welded) to the circular steel base plate 7; the top of the large column 1 is welded to the top steel plate of the pre-converter, and the lower end is suspended inside the cylindrical sleeve 5; the L-shaped support rod 3... The rod 3 is installed upside down. The bottom of the vertical beam of the L-shaped support rod 3 is welded to the circular steel base plate 7 on the outside of the cylindrical sleeve 5. The horizontal beam of the L-shaped support rod 3 points towards the large column 1. The annular steel plate 4 is welded (fully welded) to the large column 1 and is located between the horizontal beam of the L-shaped support rod 3 and the top of the cylindrical sleeve 5. There are three small columns 2, which are evenly distributed on the outside of the circular steel base plate 7. The bottom of the small columns 2 is welded to the bottom steel plate of the lower air chamber of the pre-converter, and the top supports the steel grating of the pre-converter.

[0018] Two L-shaped support rods 3 are provided, evenly distributed on the outer side of the cylindrical sleeve 5. A triangular steel plate 6 is also provided on the outer surface of the cylindrical sleeve 5. The vertical distance between the bottom end of the large column 1 and the upper edge of the cylindrical sleeve 5 is 150mm; the vertical distance between the bottom surface of the annular steel plate 4 and the upper edge of the cylindrical sleeve 5 is 100mm; and the vertical distance between the top surface of the annular steel plate 4 and the crossbeam of the L-shaped support rod 3 is 30mm.

[0019] Example 3: An internal support structure for a stabilized chemical acid production pre-converter, comprising a large column 1, a small column 2, an L-shaped support rod 3, an annular steel plate 4, a cylindrical sleeve 5, and a circular steel base plate 7; the circular steel base plate 7 is welded (segmentally welded) to the bottom steel plate of the lower gas chamber of the pre-converter; the cylindrical sleeve 5 is welded (fully welded) to the circular steel base plate 7; the top of the large column 1 is welded to the top steel plate of the pre-converter, and the lower end is suspended inside the cylindrical sleeve 5; the L-shaped support rod 3... The rod 3 is installed upside down. The bottom of the vertical beam of the L-shaped support rod 3 is welded to the circular steel base plate 7 on the outside of the cylindrical sleeve 5. The horizontal beam of the L-shaped support rod 3 points towards the large column 1. The annular steel plate 4 is welded (fully welded) to the large column 1 and is located between the horizontal beam of the L-shaped support rod 3 and the top of the cylindrical sleeve 5. There are six small columns 2, which are evenly distributed on the outside of the circular steel base plate 7. The bottom of the small columns 2 is welded to the bottom steel plate of the lower air chamber of the pre-converter, and the top supports the steel grating of the pre-converter.

[0020] Three L-shaped support rods 3 are evenly distributed on the outer side of the cylindrical sleeve 5. A triangular steel plate 6 is also provided on the outer surface of the cylindrical sleeve 5. The vertical distance between the bottom end of the large column 1 and the upper edge of the cylindrical sleeve 5 is 200mm; the vertical distance between the bottom surface of the annular steel plate 4 and the upper edge of the cylindrical sleeve 5 is 200mm; and the vertical distance between the top surface of the annular steel plate 4 and the crossbeam of the L-shaped support rod 3 is 50mm.

[0021] The internal support structure of the above embodiment changes the installation method of the large column of the preconverter, thereby improving the stability of the column, preventing the deformation of the bottom of the cylinder due to longitudinal deformation of the column, which would affect the overall support effect of the bottom gas chamber, and preventing the upper steel grid layer from tilting or even collapsing due to lateral deformation of the column, which would cause the catalyst to fall into the gas chamber.

[0022] Obviously, the above embodiments are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description; it is neither necessary nor possible to exhaustively list all possible implementations here; however, obvious variations or modifications derived therefrom are still within the protection scope of the present invention.

Claims

1. A stabilizing internal support structure for a chemical acid pre-reformer, characterized by: It includes a large column (1), a small column (2), an L-shaped support rod (3), a ring-shaped steel plate (4), a cylindrical sleeve (5), and a circular steel base plate (7). The circular steel base plate (7) is fixedly installed on the bottom steel plate of the lower air chamber of the pre-converter; The cylindrical sleeve (5) is fixedly installed on the circular steel base plate (7); The top of the large column (1) is fixedly installed on the top steel plate of the pre-converter, and the bottom is suspended inside the cylindrical sleeve (5); The L-shaped support rod (3) is installed upside down. The bottom of the vertical beam of the L-shaped support rod (3) is fixedly installed on the circular steel base plate (7) on the outside of the cylindrical sleeve (5). The horizontal beam of the L-shaped support rod (3) points towards the large column (1). The annular steel plate (4) is fixedly installed on the large column (1) and is located between the crossbeam of the L-shaped support rod (3) and the top of the cylindrical sleeve (5); At least three small columns (2) are provided, evenly distributed on the outside of the circular steel base plate (7); the bottom of the small columns (2) is fixedly installed on the bottom steel plate of the lower air chamber of the pre-converter, and the top supports the steel grid of the pre-converter.

2. The internal support structure for a stabilized engineered acid pre-reformer according to claim 1, characterized in that: At least two L-shaped support rods (3) are provided, evenly distributed on the outside of the cylindrical sleeve (5).

3. The internal support structure for a stabilized engineered acid pre-reformer according to claim 1, wherein: The outer side of the cylindrical sleeve (5) is also provided with a triangular steel plate (6).

4. The internal support structure for stabilizing a chemical acid pre-reformer according to claim 1, wherein: The vertical distance between the bottom end of the large column (1) and the upper edge of the cylindrical sleeve (5) is 150-200mm; the vertical distance between the bottom surface of the annular steel plate (4) and the upper edge of the cylindrical sleeve (5) is 100-200mm; the vertical distance between the top surface of the annular steel plate (4) and the crossbeam of the L-shaped support rod (3) is 30-50mm.

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