A dry multi-channel gas purification tower and its working method

Abstract

The present invention relates to a dry multi-channel gas purification tower and a working method thereof, wherein the purification tower comprises a tower body, a gas inlet pipe and a plurality of groups of purifier columns; the purifier columns are installed in the tower body, and include a central tube, an upper purifier ring and a lower purifier ring, and an air intake space is left between the upper purifier ring and the corresponding lower purifier ring; a gas inlet is arranged at the bottom of the tower body, the gas inlet pipe extends into the bottom of the tower body from the gas inlet, and is connected to the bottom of the central tube of each group of purifier columns through the corresponding gas branch pipe, and a plurality of gas distribution ports are opened along the circumferential direction of the pipe wall of the central tube corresponding to the air intake space; a gas outlet is arranged at the top center of the tower body, and a purifier column installation hole is arranged just above each group of purifier columns at the top of the tower body. The present invention adopts a plurality of purifier columns to form a plurality of gas channels in the purification tower, and the gas is directly purified through the purifier layer in the upper purifier ring and the lower purifier ring, the gas flow channel is short, the pressure drop is low, and the purifier column is convenient to load, unload and replace.

Description

Technical Field

[0001] The present invention relates to the technical field of gas purification, and in particular to a dry multi-channel gas purification tower and a working method thereof. Background Art

[0002] After the initial purification, the coke oven gas still contains a small amount of H2S gas. In some occasions where the content of impurities such as sulfur in the gas is strictly controlled, it is necessary to carry out fine desulfurization of the gas to further remove the small amount of H2S gas contained in the gas.

[0003] Most of the existing coal gas fine desulfurization equipment is a dry packed tower, which uses iron or zinc oxidants, activated carbon, and microcrystalline materials as purifiers. After the coal gas passes through the packing layer, the remaining H2S gas, as well as impurities such as hydrogen cyanide, nitrogen oxides, and tar mist are removed to achieve purification. In order to facilitate regular replacement, the purifier is often installed in a purifier basket. For example, a "coal gas dry desulfurization tower" disclosed in the Chinese utility model patent with patent number ZL92232577.4 includes a vertical cylindrical tower body and a cover plate. One or more containers for containing desulfurizers are provided in the tower body, and the container can also be loaded with desulfurizers and put into or take out of the tower body from the top of the tower.

[0004] As gas purification equipment develops towards larger sizes, the sealing surfaces between the purifier baskets become longer, making gas sealing difficult and possibly causing short circuits. In addition, due to limitations in its own rigidity, the lifting and unloading of large-diameter purifier baskets is also very difficult. Summary of the invention

[0005] The present invention provides a dry multi-channel coal gas purification tower and a working method thereof, wherein a plurality of purifier columns are used to form a plurality of coal gas channels in the purification tower, and the coal gas is directly purified through the purifier layers in the upper purifier ring and the lower purifier ring. The coal gas flow channel is short, the pressure drop is low, and the purifier columns are easy to load, unload and replace.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A dry multi-channel gas purification tower comprises a tower body, a gas inlet pipe and a plurality of groups of purifier columns; the tower body is a closed tower body, the plurality of groups of purifier columns are installed in the tower body and are evenly distributed along the cross section of the tower body; each group of purifier columns comprises a central tube, an upper purifier ring and a lower purifier ring, the upper purifier ring and the lower purifier ring are respectively composed of an annular cylinder and a purifier filled in the annular cylinder, the annular cylinder is sleeved on the outer side of the central tube; an air intake space is reserved between the upper purifier ring and the corresponding lower purifier ring, the top and the bottom of the annular cylinder are both provided with a sieve-shaped perforated plate; a gas inlet is provided at the bottom of the tower body, the gas inlet pipe extends from the gas inlet into the bottom of the tower body, and is connected with the bottom of the central tube of each group of purifier columns through the corresponding gas branch pipe, and a plurality of gas distribution ports are circumferentially provided on the upper wall of the central tube corresponding to the air intake space; a gas outlet is provided at the top center of the tower body, and a purifier column mounting hole is provided at the top of the tower body corresponding to each group of purifier columns

[0008] The tower body is composed of a bottom plate, a tower wall and a top cover, and the cross section of the tower body is circular.

[0009] The cross section of the purifier column is circular.

[0010] The gas branch pipe is welded and fixed to the bottom plate of the tower body and the central pipe at the corresponding position, so as to support and position the purifier column.

[0011] A positioning ring is arranged outside the middle of the central tube at a position corresponding to the air inlet space, and the positioning ring is sealedly connected with the annular cylinder of the upper purifier ring and the annular cylinder of the lower purifier ring.

[0012] An annular positioning platform is arranged at the bottom of the annular cylinder of the upper purifier ring, and the bottom of the annular positioning platform is sealed and connected to the top of the lower purifier ring; the space between the inner side of the annular positioning platform and the central tube is the air intake space.

[0013] The top of the annular cylinder of the upper purifier ring and the top of the annular cylinder of the lower purifier ring are respectively provided with hanging ears.

[0014] The working method of the dry multi-channel coal gas purification tower comprises: coal gas containing a small amount of H2S and other impurities after preliminary purification enters the bottom of the tower body from the coal gas inlet pipe, enters the central pipe of each group of purifier columns through multiple coal gas branch pipes, and flows upward along the central pipe; in the middle of the central pipe, the coal gas enters the air intake space through multiple coal gas distribution ports, and then is divided into two paths, one path passes through the purifier in the lower purifier ring downward, flows out from the bottom of the lower purifier ring after removing H2S and other impurities, and flows upward through the gaps between each group of purifier columns and between the purifier column and the tower wall; the other path of coal gas passes through the purifier in the upper purifier ring upward, flows out from the top of the upper purifier ring after removing H2S and other impurities; the two paths of purified coal gas merge and flow out from the coal gas outlet at the top of the tower body; when the purifier column needs to be replaced, the upper purifier ring and the lower purifier ring are respectively lifted out through the purifier column installation hole at the top of the tower body for replacement.

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

[0016] 1) By arranging multiple purifier columns in the tower body to purify the coal gas, for a large-scale coal gas purification tower, it is only necessary to increase the number of purifier columns without increasing the diameter of the purifier columns; therefore, the versatility and applicability are stronger;

[0017] 2) The gas passes through the purifier layer along multiple channels, with a large flow area, low flow velocity, short flow channel and low pressure drop;

[0018] 3) Compared with the scheme of using a single purifier basket, the design of multiple purifier columns has better overall fluid mechanics performance and enhanced mass transfer capacity, avoiding the problems of difficult installation of purifier baskets and poor sealing of large-diameter purifier baskets caused by large-scale equipment;

[0019] 4) Each purifier ring is equipped with lifting ears to facilitate lifting and replacement of purifiers. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of a dry multi-channel gas purification tower described in the present invention.

[0021] Figure 2 yes Figure 1 AA view in.

[0022] In the figure: 1. Tower body 2. Gas inlet pipe 3. Gas branch pipe 4. Lower purifier ring 5. Upper purifier ring 6. Purifier 7. Center pipe 8. Gas distribution port 9. Gas outlet 10. Gas purification column installation hole DETAILED DESCRIPTION

[0023] The specific implementation of the present invention will be further described below in conjunction with the accompanying drawings:

[0024] like Figure 1 , Figure 2 As shown, the dry multi-channel gas purification tower of the present invention comprises a tower body 1, a gas inlet pipe 2 and a plurality of groups of purifier columns; the tower body 1 is a closed tower body, and the plurality of groups of purifier columns are installed in the tower body 1 and are evenly distributed along the cross section of the tower body 1; each group of purifier columns comprises a central tube 7, an upper purifier ring 5 and a lower purifier ring 4, and the upper purifier ring 5 and the lower purifier ring 4 are respectively composed of an annular cylinder and a purifier 6 filled in the annular cylinder, and the annular cylinder is sleeved on the outer side of the central tube 7; the upper purifier ring 5 An air intake space is left between the corresponding lower layer purifier ring 4, and mesh-shaped perforated plates are provided at the top and bottom of the annular cylinder; a gas inlet is provided at the bottom of the tower body 1, and a gas inlet pipe 2 extends from the gas inlet into the bottom of the tower body 1, and is connected with the bottom of the central tube 7 of each group of purifier columns through the corresponding gas branch pipe 3, and a plurality of gas distribution ports 8 are provided in the circumferential direction on the wall of the central tube 7 corresponding to the air intake space; a gas outlet 9 is provided at the top center of the tower body 1, and a purifier column mounting hole 10 is provided at the top of the tower body 1 corresponding to each group of purifier columns.

[0025] The tower body 1 is composed of a bottom plate, a tower wall and a top cover, and the cross section of the tower body 1 is circular.

[0026] The cross section of the purifier column is circular.

[0027] The gas branch pipe 3 is welded and fixed to the bottom plate of the tower body 1 and the central pipe 7 at the corresponding position, so as to support and position the purifier column.

[0028] A positioning ring is arranged outside the middle of the central tube 7 at a position corresponding to the air intake space, and the positioning ring is sealedly connected to the annular cylinder of the upper purifier ring 5 and the annular cylinder of the lower purifier ring 4 .

[0029] An annular positioning platform is provided at the bottom of the annular cylinder of the upper purifier ring 5, and the bottom of the annular positioning platform is sealed and connected to the top of the lower purifier ring 4; the space between the inner side of the annular positioning platform and the central tube 7 is the air intake space.

[0030] The top of the annular cylinder of the upper purifier ring 5 and the top of the annular cylinder of the lower purifier ring 4 are respectively provided with lifting ears.

[0031] The working method of the dry multi-channel coal gas purification tower includes: coal gas containing a small amount of H2S and other impurities after preliminary purification enters the bottom of the tower body 1 from the coal gas inlet pipe 2, enters the central pipe 7 of each group of purifier columns through multiple coal gas branch pipes 3, and flows upward along the central pipe 7; in the middle of the central pipe 7, the coal gas enters the air intake space through multiple coal gas distribution ports 8, and then is divided into two paths, one of which passes downward through the purifier 6 in the lower purifier ring 4, and after removing H2S and other impurities, it flows out from the lower purifier ring 4, and flows upward through the gaps between the groups of purifier columns and between the purifier columns and the tower wall; the other path of coal gas passes upward through the purifier 6 in the upper purifier ring 5, and flows out from the top of the upper purifier ring 5 after H2S and other impurities are removed; the two paths of purified coal gas merge and flow out from the coal gas outlet 9 at the top of the tower body 1; when the purifier column needs to be replaced, the upper purifier ring 5 and the lower purifier ring 4 can be lifted out respectively through the purifier column installation hole 10 at the top of the tower body 1 for replacement.

[0032] The diameter of the mesh-shaped perforated plate on the annular cylinder is smaller than the minimum particle size of the purifier.

[0033] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A dry multi-channel gas purification tower, characterized in that: The invention comprises a tower body, a gas inlet pipe and a plurality of groups of purifier columns; the tower body is a closed tower body, which is composed of a bottom plate, a tower wall and a top cover, and the cross section of the tower body is circular; the plurality of groups of purifier columns are installed in the tower body and are evenly distributed along the cross section of the tower body; the cross section of the purifier column is circular, and there are gaps between each group of purifier columns and between the purifier columns and the tower wall; each group of purifier columns comprises a central tube, an upper purifier ring and a lower purifier ring, and the upper purifier ring and the lower purifier ring are respectively composed of an annular cylinder and a purifier filled in the annular cylinder, and the annular The cylinder is sleeved on the outside of the central tube; an air intake space is left between the upper purifier ring and the corresponding lower purifier ring, and mesh-shaped perforated plates are arranged on the top and bottom of the annular cylinder; a gas inlet is arranged at the bottom of the tower body, and a gas inlet pipe extends from the gas inlet into the bottom of the tower body, and is connected with the bottom of the central tube of each group of purifier columns through the corresponding gas branch pipes, and a plurality of gas distribution ports are arranged circumferentially on the pipe wall of the central tube corresponding to the air intake space; a gas outlet is arranged at the top center of the tower body, and a purifier column mounting hole is arranged just above each group of purifier columns at the top of the tower body.

2. A dry multi-channel gas purification tower according to claim 1, characterized in that: The gas branch pipe is welded and fixed to the bottom plate of the tower body and the central pipe at the corresponding position, so as to support and position the purifier column.

3. A dry multi-channel gas purification tower according to claim 1, characterized in that: A positioning ring is arranged outside the middle of the central tube at a position corresponding to the air inlet space, and the positioning ring is sealedly connected with the annular cylinder of the upper purifier ring and the annular cylinder of the lower purifier ring.

4. A dry multi-channel gas purification tower according to claim 1, characterized in that: An annular positioning platform is arranged at the bottom of the annular cylinder of the upper purifier ring, and the bottom of the annular positioning platform is sealed and connected to the top of the lower purifier ring; the space between the inner side of the annular positioning platform and the central tube is the air intake space.

5. A dry multi-channel gas purification tower according to claim 1, characterized in that: The top of the annular cylinder of the upper purifier ring and the top of the annular cylinder of the lower purifier ring are respectively provided with hanging ears.

6. The operating method of the dry multi-channel gas purification tower according to any one of claims 1 to 5, characterized in that: include: After preliminary purification, the coal gas containing a small amount of H2S and other impurities enters the bottom of the tower body from the coal gas inlet pipe, enters the central pipe of each group of purifier columns through multiple coal gas branch pipes, and flows upward along the central pipe; in the middle of the central pipe, the coal gas enters the air intake space through multiple coal gas distribution ports, and then is divided into two paths, one path passes through the purifier in the lower purifier ring downward, flows out from the bottom of the lower purifier ring after removing H2S and other impurities, and flows upward through the gaps between each group of purifier columns and between the purifier column and the tower wall; the other path of coal gas passes through the purifier in the upper purifier ring upward, flows out from the top of the upper purifier ring after removing H2S and other impurities; the two paths of purified coal gas merge and flow out from the coal gas outlet at the top of the tower body; when the purifier column needs to be replaced, the upper purifier ring and the lower purifier ring are respectively lifted out through the purifier column installation hole at the top of the tower body for replacement.

Images