External distributor of converter

Abstract

The present invention relates to an external distributor for a converter, comprising an outer cylinder uniformly distributed with a large number of air inlet holes, an inner filter coaxially disposed within the outer cylinder, and an annular buffer air distribution cavity formed between the outer cylinder and the inner filter. Air guide plates corresponding to the air inlet holes are connected to the inner wall of the outer cylinder. The air guide plates guide gas into the buffer air distribution cavity along a tangential direction of the buffer air distribution cavity. All air guide plates guide process gas into the buffer air distribution cavity uniformly in a clockwise or counterclockwise direction. The mesh size of the inner filter is determined based on the size of the catalyst particles used in the converter, so as to effectively block the catalyst particles. The present invention can improve the uniformity of process gas distribution, enhance the quality of product gas, and improve the operating stability of the converter.

Description

Technical Field

[0001] The invention belongs to the technical field of conversion furnaces, and in particular relates to an external distributor of a conversion furnace. Background Art

[0002] The external distributor is an important part of the shift converter. It divides the shift converter into two parts. The outside of the external distributor is the gas cavity, and the inside of the external distributor is the catalyst cavity. The quality of the external distributor will determine the uniformity of the process gas in the gas cavity entering the catalyst cavity, thereby affecting the quality of the product gas and the stability of the shift converter.

[0003] After the common conversion furnace takes in air, the process gas is unevenly distributed when entering the catalyst chamber through the external distributor, resulting in uneven catalytic effect. The local catalyst transition reaction causes the temperature to exceed the design temperature, posing a safety hazard of damaging the equipment. The catalyst failure after the transition reaction causes the process gas in this area to be unable to react, affecting the product gas quality indicators.

[0004] Therefore, it is necessary to develop an external distributor for the shift converter to improve the uniformity of the process gas when it enters the catalyst chamber, thereby improving the quality of the product gas and the operating stability of the shift converter. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a converter external distributor which can improve the uniformity of process gas distribution.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a distributor outside the conversion furnace, including an outer cylinder, a large number of air inlet holes are evenly distributed on the outer cylinder, an inner filter is coaxially arranged inside the outer cylinder, and an annular buffer air distribution cavity is formed between the outer cylinder and the inner filter. An air guide plate corresponding to the air inlet holes is connected to the inner wall of the outer cylinder, and the air guide plate guides the gas into the buffer air distribution cavity along the tangential direction of the buffer air distribution cavity. All air guide plates guide the process gas to enter the buffer air distribution cavity in a uniform clockwise direction or in a uniform counterclockwise direction. The mesh size of the inner filter is determined according to the size of the catalyst particles used in the conversion furnace, so as to effectively block the catalyst particles.

[0007] As a preferred solution, the air guide plates are all integrated on an intermediate cylinder, which is provided with air guide holes corresponding to the air guide plates. The intermediate cylinder is attached to the outer cylinder, and a buffer air distribution cavity is formed between the intermediate cylinder and the inner filter.

[0008] As a preferred solution, the inner filter is fixedly connected to the middle cylinder through a plurality of positioning rings arranged in parallel up and down, and the plurality of positioning rings divide the air cavity of the buffer cloth into a plurality of independent sections.

[0009] As a preferred solution, the inner filter screen adopts a Johnson screen.

[0010] As a preferred solution, the air guide plate includes a long flat plate, an arc-shaped side plate connected to any long side of the flat plate, and two arc-shaped end plates respectively connected to the two short sides of the flat plate. The two end plates are respectively connected to the two ends of the side plate and have a smooth transition. The air guide plate is vertically connected to the intermediate cylinder through the side plate and the end plate. The side plate and the end plate are respectively smoothly connected to the edges of the air guide holes on the intermediate cylinder. The other side of the flat plate opposite to the side plate forms an air guide outlet facing the tangent direction of the buffer cloth air cavity, and the flat plate is directly opposite to the air inlet.

[0011] As a preferred solution, the flat plate is connected to a curved baffle in the middle of one side of the air outlet, the vertical height of the baffle is not less than the diameter of the air inlet, and any baffle is at the same height as the air inlet facing the flat plate.

[0012] As a preferred solution, the upper end of the outer cylinder is also connected to a frustum-shaped air distribution hood, which closes the upper end of the outer cylinder. A buffer air distribution ring with a "C"-shaped cross-section is connected to the outer wall of the air distribution hood. The inner edge of the buffer air distribution ring is sealed to the outer wall of the air distribution hood, and the outer edge is used to be sealed to the inner wall of the upper head of the conversion furnace. The arched surface of the buffer air distribution ring faces upward, and a large number of through holes are evenly distributed on the buffer air distribution ring.

[0013] The beneficial effects of the present invention are as follows: the present invention forms a buffer air cloth cavity through the outer cylinder and the inner filter screen, and at the same time adopts an air guide plate to guide the process gas into the buffer air cloth cavity along the tangential direction of the buffer air cloth cavity, thereby reducing the resistance during the circulation of the process gas, so that the process gas quickly fills the buffer air cloth cavity, and then diffuses evenly into the catalyst through the inner filter screen, thereby improving the uniformity of the process gas distribution, improving the quality of the product gas and the working stability of the conversion furnace.

[0014] The present invention further improves the installation convenience of the air guide plates by integrating all the air guide plates on an intermediate cylinder.

[0015] The present invention further uses multiple positioning rings to install the inner filter screen, which improves the stability of the inner filter screen and divides the buffer cloth air cavity into multiple independent intervals. The diffusion states of the process gas in each independent interval are independent of each other, eliminating the phenomenon of uneven density of the process gas in the buffer cloth air cavity caused by long-distance sinking of the process gas in the buffer cloth air cavity, improving the uniformity of the distribution of the process gas in the buffer cloth air cavity, and promoting the uniform distribution of the process gas to the catalyst through the inner filter screen.

[0016] The present invention further adopts a Johnson mesh as an inner filter. When in use, the Johnson mesh is formed into a cylindrical shape and fixed on the inner wall of the middle cylinder. The inner mesh holes of the Johnson mesh are larger than the outer mesh holes. The outer side of the Johnson mesh makes it easier for the process gas to diffuse into the catalyst, and the inner side of the Johnson mesh effectively blocks the catalyst from overflowing outward.

[0017] The present invention further improves the structure of the air guide plate, uses side plates and end plates to block the disordered diffusion of process gas, and uses a flat plate to guide the process gas from the air guide outlet into the buffer cloth air cavity along the tangent direction of the buffer cloth air cavity, so that the process gas can quickly and evenly fill the entire buffer cloth air cavity in an orderly manner along the same clockwise rotation direction, further ensuring the uniformity of the process gas distribution.

[0018] The present invention further improves the structural stability of the air guide plate through the baffle, ensuring that the air guide outlet is unobstructed.

[0019] The present invention further introduces the process gas evenly into the periphery of the outer cylinder through the gas distribution hood and the buffer gas distribution ring, so that the process gas outside the outer cylinder is evenly distributed, ensuring that the process gas can evenly enter the buffer gas distribution cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The specific embodiments of the present invention are further described in detail below with reference to the accompanying drawings, wherein:

[0021] Figure 1 It is a structural schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the connection structure between the intermediate cylinder part and the air guide plate;

[0023] Figure 3 It is a schematic diagram of the connection structure between the external distributor and the converter shell of the present invention.

[0024] Figures 1 to 3 Middle: 1. Outer cylinder, 2. Air inlet, 3. Inner filter, 4. Buffer air distribution cavity, 5. Air guide plate, 501. Flat plate, 502. Side plate, 503. End plate, 6. Middle cylinder, 7. Air guide hole, 8. Positioning ring, 9. Air guide outlet, 10. Baffle, 11. Air distribution hood, 12. Buffer air distribution ring, 13. Through hole, 14. Upper head, 15. Outer cylinder. DETAILED DESCRIPTION

[0025] The specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0026] like Figure 1 ~ and Figure 2As shown, the external distributor of the conversion furnace includes an outer cylinder 1, on which a large number of air inlet holes 2 are evenly distributed, and an inner filter screen 3 is coaxially arranged inside the outer cylinder 1. An annular buffer air cavity 4 is formed between the outer cylinder 1 and the inner filter screen 3, and air guide plates 5 corresponding to the air inlet holes 2 are connected to the inner wall of the outer cylinder 1. The air guide plates 5 guide the gas into the buffer air cavity 4 along the tangential direction of the buffer air cavity 4. All air guide plates 5 guide the process gas to enter the buffer air cavity 4 in a uniform clockwise direction or in a uniform counterclockwise direction. The mesh size of the inner filter screen 3 is determined according to the size of the catalyst particles used in the conversion furnace, so as to effectively block the catalyst particles.

[0027] The air guide plates 5 are all integrated on an intermediate cylinder 6, which is provided with air guide holes 7 corresponding to the air guide plates 5. The intermediate cylinder 6 is in contact with the outer cylinder 1, and a buffer air cavity 4 is formed between the intermediate cylinder 6 and the inner filter screen 3.

[0028] The inner filter screen 3 is fixedly connected to the intermediate cylinder 6 via a plurality of positioning rings 8 arranged in parallel up and down. The plurality of positioning rings 8 divide the buffer cloth air cavity 4 into a plurality of independent sections.

[0029] In this embodiment, the inner filter screen 3 is made of Johnson mesh, but in actual production, high temperature resistant filter materials such as mesh plates and screens can also be used.

[0030] like Figure 2 As shown, the air guide plate 5 includes a long flat plate 501, an arc-shaped side plate 502 connected to any long side of the flat plate 501, and two arc-shaped end plates 503 respectively connected to the two short sides of the flat plate 501. The two end plates 503 are respectively connected to the two ends of the side plate 502 and have a smooth transition. The air guide plate 5 is vertically connected to the intermediate cylinder 6 through the side plate 502 and the end plate 503. The side plate 502 and the end plate 503 are respectively smoothly connected to the edges of the air guide hole 7 on the intermediate cylinder 6. The other side of the flat plate 501 opposite to the side plate 502 forms an air guide outlet 9 facing the tangent direction of the buffer air cavity 4, and the flat plate 501 is directly opposite to the air inlet 2.

[0031] An arc-shaped baffle 10 is connected to the middle of one side of the flat plate at the air outlet 9. The vertical height of the baffle 10 is not less than the diameter of the air inlet 2. The height of any baffle 10 is consistent with the air inlet 2 facing the flat plate 501 on which it is located.

[0032] like Figure 3As shown, the upper end of the outer cylinder 1 is also connected to a frustum-shaped air distribution hood 11, which closes the upper end of the outer cylinder 1. A buffer air distribution ring 12 with a "C"-shaped cross-section is connected to the outer wall of the air distribution hood 11. The inner edge of the buffer air distribution ring 12 is sealed to the outer wall of the air distribution hood 11, and the outer edge is used to be sealed to the inner wall of the upper head 14 of the converter furnace. The arched surface of the buffer air distribution ring 12 faces upward, and a large number of through holes 13 are evenly distributed on the buffer air distribution ring 12.

[0033] The working process of the present invention is as follows: Figure 3 As shown, first, the external distributor of the present invention is installed in the shell of the converter furnace. The specific installation method is: a positioning ring 2 16 is set on the inner wall of the outer cylinder 15 of the converter furnace shell, and then the entire external distributor is hoisted from the upper end of the outer cylinder 15 into the outer cylinder 15, and is coaxially arranged with the outer cylinder 15. The lower end of the external distributor is placed on the positioning ring 2 16 to form an annular air cavity 17 between the external distributor and the outer cylinder 15, and then the upper head 14 is installed at the upper end of the outer cylinder 15, and the outer edge of the buffer air ring is sealed and welded to the inner wall of the upper head 14 to complete the installation.

[0034] During use, the process gas enters the space between the air distribution hood 11 and the upper head 14 through the process gas inlet provided on the upper head 14, and then flows downward evenly into the annular air cavity 17 through the through hole 13 on the buffer air distribution ring 12, so that the process gas in the annular air cavity 17 is evenly distributed. When the process gas pressure in the annular air cavity 17 reaches a certain value, the process gas enters the buffer air distribution cavity 4 through the air inlet holes 2 on the outer cylinder 1. After passing through the air inlet holes 2, the process gas reduces its flow rate due to the impact on the flat plate 501 of the air guide plate 5, and at the same time diffuses in the air guide plate 5, and finally is guided by the air guide plate 5, flows out from the air guide outlet 9 along the tangential direction of the buffer air distribution cavity 4, and enters the buffer air distribution cavity, so as to prevent the process gas from flowing directly from the air inlet holes 2 to the inner filter screen 3 in the opposite position and directly entering the catalyst.

[0035] The air guide plate 5 guides the process gas to be evenly distributed in the buffer air cavity 4, and then the process gas in the buffer air cavity 4 is evenly diffused from various parts of the inner filter 3 into the catalyst, thereby achieving the technical goal of improving the uniformity of process gas distribution, improving the quality of product gas and the working stability of the conversion furnace.

[0036] The special structure of the buffer air ring 12 enables it to buffer the process gas, reduce the flow rate of the process gas through the through hole 13, eliminate the chaotic airflow in the annular air cavity 17 as much as possible, avoid excessive local process gas concentration in the annular air cavity 17, and improve the uniformity of process gas distribution.

[0037] The above embodiments are merely illustrative of the principles and effects of the present invention, as well as some embodiments of its application, and are not intended to limit the present invention. It should be noted that a person skilled in the art can make several modifications and improvements without departing from the creative concept of the present invention, and these all fall within the scope of protection of the present invention.

Claims

1. A converter external distributor, comprising an outer cylinder (1), with a large number of air inlet holes (2) uniformly distributed on the outer cylinder (1), characterized in that: An inner filter screen (3) is coaxially arranged inside the outer cylinder (1), and an annular buffer cloth air cavity (4) is formed between the outer cylinder (1) and the inner filter screen (3). An air guide plate (5) corresponding to the air inlet hole (2) is connected to the inner wall of the outer cylinder (1). The air guide plate (5) guides the gas into the buffer cloth air cavity (4) along the tangential direction of the buffer cloth air cavity (4). All air guide plates (5) guide the process gas to enter the buffer cloth air cavity (4) in a uniform clockwise direction or in a uniform counterclockwise direction. The mesh size of the inner filter screen (3) is determined according to the conversion furnace used. The size of the catalyst particles is determined to be effective in blocking the catalyst particles; the air guide plates (5) are all integrated on an intermediate cylinder (6), and the intermediate cylinder (6) is provided with air guide holes (7) corresponding to the air guide plates (5) one by one, the intermediate cylinder (6) is bonded to the outer cylinder (1), and a buffer air cavity (4) is formed between the intermediate cylinder (6) and the inner filter screen (3); the inner filter screen (3) is fixedly connected to the intermediate cylinder (6) through a plurality of positioning rings (8) arranged in parallel up and down, and the plurality of positioning rings (8) divide the buffer air cavity (4) into a plurality of independent sections; The upper end of the outer cylinder (1) is further connected to a cone-shaped air distribution hood (11), which seals the upper end of the outer cylinder (1). A buffer air distribution ring (12) with a "C"-shaped cross section is connected to the outer wall of the air distribution hood (11). The inner edge of the buffer air distribution ring (12) is sealed to the outer wall of the air distribution hood (11), and the outer edge is used to be sealed to the inner wall of the converter upper head (14). The arched surface of the buffer air distribution ring (12) faces upward, and a large number of through holes (13) are uniformly distributed on the buffer air distribution ring (12); The air guide plate (5) comprises a long strip flat plate (501), an arcuate side plate (502) connected to any long side of the flat plate (501), and two arcuate end plates (503) respectively connected to the two short sides of the flat plate (501). The two end plates (503) are respectively connected to the two ends of the side plate (502) and smoothly transition. The flat plate (501) is vertically connected to the middle cylinder (6) through the side plate (502) and the end plate (503). The side plate (502) and the end plate (503) are respectively smoothly connected to the edges of the air guide hole (7) on the middle cylinder (6). The other side of the flat plate (501) opposite to the side plate (502) forms an air guide outlet (9) facing the tangent direction of the buffer air distribution cavity (4). The flat plate (501) is directly opposite to the air inlet (2). The flat plate is located in the middle of one side of the air guide outlet (9) and is connected to an arc-shaped baffle (10). The vertical height of the baffle (10) is not less than the diameter of the air inlet (2). The height of any baffle (10) is consistent with the air inlet (2) directly facing the flat plate (501) on which it is located.

2. The converter external distributor according to claim 1, characterized in that: The inner filter (3) is a Johnson mesh.

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