Method for reducing packing hardening of blast furnace gas dry desulfurization tower

Abstract

The application discloses a method for reducing packing of packing plates in a blast furnace gas dry-type horizontal desulfurization tower, and relates to the technical field of blast furnace gas desulfurization. The application is used to solve the problem that the lower part of the desulfurizer packing in the blast furnace gas dry-type horizontal desulfurization tower is prone to packing and increasing resistance. The application comprises an upper partition plate and a lower partition plate arranged at the upper end and the lower end of the packing layer in the tower body, and a support frame fixedly installed at the lower end and the upper end of the lower partition plate. The part of the support frame at the lower end of the lower partition plate supports the packing layer in the middle part of the tower body, and the part of the support frame at the upper end of the lower partition plate is used for supporting the upper partition plate. The part of the support frame at the upper end of the lower partition plate divides the packing layer into two parts, and an upper inclined plate and a lower inclined plate are detachably installed in each part. The two inclined plates divide the packing layer in the part into three chambers, i.e. an upper chamber, a middle chamber and a lower chamber, and the originally equal amount of packing is distributed in the chambers to disperse the pressure. The application can effectively reduce the packing of the desulfurizer packing after ballast, and is beneficial to reducing the gas resistance and pressure drop.

Description

Technical Field

[0001] This invention relates to the field of blast furnace gas desulfurization technology, specifically a method for reducing packing caking in a dry horizontal desulfurization tower for blast furnace gas. Background Technology

[0002] Methods for fine desulfurization of blast furnace gas at the source mainly include two categories: dry desulfurization and wet desulfurization. Dry desulfurization towers are further divided into vertical and horizontal towers. In horizontal dry desulfurization towers for blast furnace gas, the packing layer is filled with desulfurizing agent. After a certain period of system operation, the desulfurizing agent needs to be replaced. However, under normal circumstances, after long-term operation, the lower part of the desulfurizing agent tends to caking, increasing the packing resistance. This is extremely detrimental to the relatively low pressure of blast furnace gas. Furthermore, caking also makes packing replacement more difficult.

[0003] The invention patent with publication number CN214075945U, entitled "Desulfurization Tower and Its Anti-caking Device," discloses a method of setting a portion of the outer wall of the tower as an elastic deformable plate and using a rapping method to crack the caking. Although the effect is expected to achieve the goal of clearing the caking, the device requires a redesign of the outer wall of the tower, and its load-bearing capacity, sealing performance, and durability are all difficult problems to overcome. There are also caking-related solutions in other fields. For example, the invention patent with publication number CN210259640U, entitled "A Limestone Powder Silo for Flue Gas Desulfurization That Is Not Easily Caking," discloses a technical solution of setting a stirring device and a spring-shaped stirring rod at the bottom. Although it can also reduce caking through continuous stirring, this approach is not only energy-intensive, but also has the problems of cumbersome maintenance and difficulty in being applied to dry horizontal desulfurization towers for blast furnace gas. Summary of the Invention

[0004] The purpose of this invention is to provide a method for reducing packing caking in a dry horizontal desulfurization tower for blast furnace gas, so as to solve the problem that the lower part of the desulfurizing agent packing in the dry horizontal desulfurization tower for blast furnace gas is prone to caking, increasing resistance.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a method for reducing packing caking in a dry horizontal desulfurization tower for blast furnace gas, comprising the following specific contents:

[0006] Upper baffles and lower baffles are respectively installed at the upper and lower ends of the packing layer inside the desulfurization tower. Support frames are fixedly installed at the lower and upper ends of the lower baffles. The part located at the lower end of the lower baffles supports the packing layer in the middle of the tower body, and the part located at the upper end of the lower baffles is set in the middle of the lower baffles to support the upper baffles.

[0007] The support frame located at the upper part of the lower partition plate divides the packing layer into two parts. Each part is detachably equipped with an upper inclined plate and a lower inclined plate. The two inclined plates divide the packing layer of the part into three chambers: upper, middle and lower. The same amount of packing as the original is distributed into each chamber to disperse the pressure.

[0008] The upper partition, lower partition, upper inclined plate, and lower inclined plate all use detachable and fixedly installed perforated plates.

[0009] Preferably, unloading holes for the upper inclined plate and the lower inclined plate are respectively provided in the lower part of the upper inclined plate and the lower inclined plate for unloading.

[0010] Preferably, the upper inclined plate discharge hole and the lower inclined plate discharge hole are respectively equipped with cover plates. When the packing is unloaded, a portion of the packing is first released through the manhole located at the packing layer of the desulfurization tower body. Then, the cover plate of the lower inclined plate discharge hole is opened, and another portion of the packing is released. Then, the cover plate of the upper inclined plate discharge hole is opened. After the packing can no longer be released, each screen plate is disassembled to complete the unloading.

[0011] Preferably, the upper end of the upper inclined plate is detachably fixed to the middle part of the upper partition plate by bolts, the lower end of the upper inclined plate and the upper end of the lower inclined plate are respectively detachably fixed to the inner wall of the tower body located in the middle of the packing layer by bolts, and the lower end of the lower inclined plate is detachably fixed to the middle part of the lower partition plate by bolts.

[0012] Preferably, the tower body has at least two manholes, which are respectively opened on both sides of the tower body for unloading, and the manholes are located between the lower inclined plate and the lower partition plate, and are inclined downward.

[0013] Preferably, two loading holes are opened at the top of the tower body, located above the two parts of the packing layer divided by the support frame.

[0014] Preferably, the upper part of the tower body is connected to an outlet pipe, and the lower part is connected to an inlet pipe. The inlet pipe extends into the tower body and is provided with multiple air ports, which are evenly arranged below the lower partition.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. The method for reducing packing caking in the dry horizontal desulfurization tower for blast furnace gas is to divide the packing layer into three chambers (upper, middle, and lower) using upper and lower inclined plates. This reduces the amount of packing in each chamber and disperses the pressure, effectively reducing the caking of the desulfurizing agent packing after ballast loading, which is beneficial for reducing gas resistance and pressure drop.

[0017] 2. The dry horizontal desulfurization tower for blast furnace gas reduces packing caking and is suitable for situations with large blast furnace gas flow, low pressure, and complex composition. In addition, it can be specially equipped with a discharge hole and a manhole in a special position to facilitate the loading and unloading of desulfurizing agent packing. It is easy to use and operate, and can be easily improved in the original packing loading and unloading operation without the need to formulate a completely new loading and unloading operation plan, which is easy to implement.

[0018] 3. The method for reducing packing caking in the dry horizontal desulfurization tower for blast furnace gas is to ensure uniform utilization of each newly divided chamber by evenly arranging the air intake, thereby ensuring the effect of reducing caking. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the structure of the present invention after the filler is installed.

[0021] In the diagram: 1. Tower body; 2. Inlet pipe; 3. Outlet pipe; 4. Upper baffle; 5. Lower baffle; 6. Upper inclined plate; 7. Upper inclined plate discharge hole; 8. Lower inclined plate; 9. Lower inclined plate discharge hole; 10. Support frame; 11. Manhole; 12. Loading hole. Detailed Implementation

[0022] A method for reducing packing caking in a dry horizontal desulfurization tower for blast furnace gas includes the following specific details:

[0023] See Figure 1 and Figure 2 An upper baffle 4 and a lower baffle 5 are respectively installed at the upper and lower ends of the packing layer inside the desulfurization tower body 1. A support frame 10 is fixedly installed at the lower and upper ends of the lower baffle 5. The part located at the lower end of the lower baffle 5 supports the packing layer in the middle of the tower body 1, and the part located at the upper end of the lower baffle 5 is set in the middle of the lower baffle 5 to support the upper baffle 4.

[0024] The support frame 10, located at the upper end of the lower partition 5, divides the packing layer into two parts. Each part is detachably equipped with an upper inclined plate 6 and a lower inclined plate 8. The two inclined plates divide the packing layer in their respective parts into three chambers: upper, middle, and lower. The same amount of packing material as the original is then distributed into each chamber to disperse the pressure.

[0025] The upper partition 4, lower partition 5, upper inclined plate 6 and lower inclined plate 8 are all detachable and fixedly installed perforated plates.

[0026] Because the original packing layer of the dry horizontal desulfurization tower for blast furnace gas has all the pressure of the packing at the bottom, it is easier for the bottom to become dense and caking. After the above-mentioned improvement, the packing layer is divided into a total of 6 chambers. The amount of packing in each chamber is reduced accordingly, and the pressure is also dispersed. This can effectively reduce the phenomenon of caking of the desulfurizing agent packing after ballast, which is conducive to reducing gas resistance and pressure drop.

[0027] Under the above scheme, if the packing needs to be replaced, there is no specially set unloading structure during unloading. All the screen plates must be disassembled first, and then unloaded from the manholes provided at the packing layer of the desulfurization tower. The operation is relatively troublesome and there may be problems with disassembly. Therefore, the lower part of the upper inclined plate 6 and the lower inclined plate 8 can be further provided with upper inclined plate unloading hole 7 and lower inclined plate unloading hole 9 respectively to facilitate unloading. The upper inclined plate unloading hole 7 and the lower inclined plate unloading hole 9 can also be further provided with cover plates. When the tower body 1 is in the working state, the cover plates are closed, and when unloading, they are opened. This allows for better retention of the packing material within its designated chamber. Of course, the cover plate can be remotely controlled and electrically driven, or it can be opened and closed manually using a mechanical method. Almost any common form can be used. The specific form of the cover plate is quite common in various fields, so it will not be elaborated further. When unloading the packing material, first release a portion of the packing material through the manhole located at the packing layer in the desulfurization tower body 1, then open the cover plate of the lower inclined plate discharge hole 9, release another portion of the packing material, and then open the cover plate of the upper inclined plate discharge hole 7. After the packing material can no longer be released, disassembling each screen plate will reduce a lot of obstacles. After the screen plates are disassembled, the material can be completely unloaded.

[0028] like Figure 1 As shown, in a preferred embodiment, the upper end of the upper inclined plate 6 is bolted to the middle of the upper partition plate 4, the lower end of the upper inclined plate 6 and the upper end of the lower inclined plate 8 are bolted to the inner wall of the tower body 1 at the middle of the packing layer, and the lower end of the lower inclined plate 8 is bolted to the middle of the lower partition plate 5. The bolted connection method is common, the connection is stable and easy to disassemble.

[0029] In the above preferred embodiment, the manholes that are typically installed in desulfurization towers can be relocated to a position more suitable for this tower body 1: e.g. Figure 1 As shown, the tower body 1 has at least two manholes 11 (because the desulfurization tower is horizontal, more manholes 11 can actually be opened along the length of the tower body), which are opened on both sides of the tower body 1 for unloading, and the manholes 11 are located between the lower inclined plate 8 and the lower partition plate 5, and are set inclined downward.

[0030] In addition, in conjunction with the above method, two loading holes 12 are provided on the upper part of the tower body 1, located above the two parts of the packing layer divided by the support frame 10. When reloading, it is generally necessary to first remove each screen plate (which is usually removed during unloading). For each chamber of packing, one screen plate is reinstalled. Other reloading work is the same as when the original desulfurization tower packing is replaced, and there is no need to form a new operation plan.

[0031] The upper part of the desulfurization tower body 1 is connected to the outlet pipe 3, and the lower part is connected to the inlet pipe 2. The inlet pipe 2 can be further extended into the tower body 1 and is equipped with multiple air ports, which are evenly arranged below the lower baffle 5. Because the above method divides the packing layer into two halves, a more refined distribution of air intake is required to maximize the desulfurization efficiency. Otherwise, it is easy for some packing to have an excessively high utilization rate while the other part has an excessively low utilization rate, which may indirectly lead to the premature occurrence of caking.

[0032] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope defined in the claims.

[0033] Any aspects of this invention not described in detail are well-known to those skilled in the art.

Claims

1. A method for reducing packing caking in a dry horizontal desulfurization tower for blast furnace gas, characterized in that, Includes the following specific content: An upper baffle (4) and a lower baffle (5) are respectively installed at the upper and lower ends of the packing layer in the desulfurization tower body (1). A support frame (10) is fixedly installed at the lower and upper ends of the lower baffle (5). The part located at the lower end of the lower baffle (5) supports the packing layer in the middle of the tower body (1), and the part located at the upper end of the lower baffle (5) is set in the middle of the lower baffle (5) to support the upper baffle (4). The support frame (10) located at the upper part of the lower partition (5) divides the packing layer into two parts. Each part is detachably equipped with an upper inclined plate (6) and a lower inclined plate (8). The two inclined plates divide the packing layer of the part into three chambers: upper, middle and lower. The same amount of packing material is distributed in each chamber to disperse the pressure. The upper partition (4), lower partition (5), upper inclined plate (6) and lower inclined plate (8) are all made of detachable and fixed screen plates.

2. The method for reducing packing caking in a dry horizontal desulfurization tower for blast furnace gas according to claim 1, characterized in that: The upper inclined plate (6) and the lower inclined plate (8) are respectively provided with upper inclined plate unloading hole (7) and lower inclined plate unloading hole (9) for unloading.

3. The method for reducing packing caking in a dry horizontal desulfurization tower for blast furnace gas according to claim 2, characterized in that: The upper inclined plate discharge hole (7) and the lower inclined plate discharge hole (9) are respectively equipped with cover plates. When the packing is unloaded, a portion of the packing is first released from the manhole located at the packing layer of the desulfurization tower body (1). Then, the cover plate of the lower inclined plate discharge hole (9) is opened, and another portion of the packing is released. Then, the cover plate of the upper inclined plate discharge hole (7) is opened. After the packing can no longer be released, the screen plates are disassembled to complete the unloading.

4. A method for reducing packing caking in a dry horizontal desulfurization tower for blast furnace gas according to any one of claims 1 to 3, characterized in that: The upper end of the upper inclined plate (6) is detachably fixed to the middle part of the upper partition plate (4) by bolts. The lower end of the upper inclined plate (6) and the upper end of the lower inclined plate (8) are respectively detachably fixed to the inner wall of the tower body (1) at the middle part of the packing layer by bolts. The lower end of the lower inclined plate (8) is detachably fixed to the middle part of the lower partition plate (5) by bolts.

5. A method for reducing packing caking in a dry horizontal desulfurization tower for blast furnace gas according to claim 4, characterized in that: The tower body (1) has at least two manholes (11), which are respectively opened on both sides of the tower body (1) for unloading. The manholes (11) are located between the lower inclined plate (8) and the lower partition plate (5) and are inclined downward.

6. The method for reducing packing caking in a dry horizontal desulfurization tower for blast furnace gas according to claim 1, characterized in that: Two loading holes (12) are opened at the upper part of the tower body (1), located above the two parts of the packing layer divided by the support frame (10).

7. The method for reducing packing caking in a dry horizontal desulfurization tower for blast furnace gas according to claim 1, characterized in that: The upper part of the tower body (1) is connected to the outlet pipe (3), and the lower part is connected to the inlet pipe (2). The inlet pipe (2) extends into the tower body (1) and is provided with multiple air ports, which are evenly arranged below the lower partition plate (5).

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