Pyrite acid-making drying tower

Abstract

The utility model relates to a pyrite acid-making drying tower, and belongs to the field of drying towers, the pyrite acid-making drying tower comprises a tower body, a plurality of inclined plates are arranged in the tower body, the sides, away from the inner wall of the tower body, of the inclined plates incline downwards, a plurality of acid inlet pipes are arranged in the tower body, and a plurality of acid spraying pipes are connected to the acid inlet pipes. The multiple inclined plates divide the tower body into the multiple cavities, the staying time of sulfur-containing furnace gas in the tower is prolonged, and the multiple acid inlet pipes and the multiple acid spraying pipes are arranged, so that the spraying uniformity degree is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of drying tower, in particular to a pyrite-based sulfuric acid drying tower. BACKGROUND

[0002] The principle of sulfuric acid production mainly includes pyrite, sulfur, smelting flue gas containing sulfur dioxide, natural gypsum and phosphogypsum, etc., and the sulfur concentrate of pyrite associated with non-ferrous metal by-products is the main sulfur resource in China, therefore, the domestic sulfuric acid production is mainly based on pyrite. When using pyrite to produce sulfuric acid, a certain amount of air is added to the purified sulfur-containing furnace gas (containing sulfur dioxide) to introduce the flue gas meeting the concentration requirements into the drying tower to remove the moisture in the sulfur-containing furnace gas.

[0003] The existing packing tower is a single cavity tower, and the efficiency of drying the sulfur-containing furnace gas depends on the residence time of the sulfur-containing furnace gas in the tower and the uniformity of the spray of the acid distributor. The existing acid distributor usually includes a main pipe and a plurality of branch pipes connected to the main pipe and distributed in a crab claw shape, which is prone to uneven flow of concentrated sulfuric acid, resulting in low drying efficiency of the sulfur-containing furnace gas. CONTENT OF THE UTILITY MODEL

[0004] In order to improve the above problems, the present application provides a pyrite-based sulfuric acid drying tower.

[0005] The pyrite-based sulfuric acid drying tower provided by the present application adopts the following technical scheme:

[0006] A pyrite-based sulfuric acid drying tower, comprising a tower body, a plurality of inclined plates are arranged in the tower body, the side of the inclined plate away from the inner wall of the tower body is inclined downward, a plurality of acid inlet pipes are arranged in the tower body, and a plurality of acid injection pipes are connected to the acid inlet pipes.

[0007] By adopting the above technical scheme, the tower body is divided into a plurality of cavities by the plurality of inclined plates, the residence time of the sulfur-containing furnace gas in the tower is improved, a plurality of acid inlet pipes and acid injection pipes are arranged, the uniformity of the spray is improved, the concentrated sulfuric acid can flow along the inclined plates, the residence time of the concentrated sulfuric acid in the tower body is improved, and the drying efficiency of the sulfur-containing furnace gas is improved.

[0008] Preferably, the plurality of inclined plates are distributed along the height direction of the tower body, and the plurality of acid inlet pipes are distributed along the height direction of the tower body.

[0009] By adopting the above technical scheme, the concentration of concentrated sulfuric acid in the tower body is improved by arranging a plurality of acid inlet pipes, which facilitates the reaction of concentrated sulfuric acid and sulfur-containing furnace gas; the concentrated sulfuric acid at the top can flow downward along the inclined plates and flow onto the inclined plates below, further improving the residence time of the concentrated sulfuric acid in the tower body.

[0010] Preferably, the tower body is provided with an air inlet pipe and an air outlet pipe, the air inlet pipe is located at the upper part of the tower body, and the air outlet pipe is located at the lower part of the tower body.

[0011] By adopting the above technical scheme, the sulfur-containing furnace gas enters the tower body from the upper part of the tower body and flows out from the lower part of the tower body, thereby prolonging the residence time of the sulfur-containing furnace gas in the tower and facilitating the drying work of the sulfur-containing furnace gas.

[0012] Preferably, the inclined plate is provided with drying filler, the inclined plate is fixedly connected with a support rod, the support rod is fixedly connected with a baffle, and the baffle is provided with a through hole.

[0013] By adopting the above technical scheme, the baffle can limit the drying filler, so that the drying filler is stored on the inclined plate, and the sulfur-containing furnace gas can flow through the through hole of the baffle to realize the drying work of the sulfur-containing furnace gas.

[0014] Preferably, the bottom of the tower body is provided with an acid outlet box, the bottom of the acid outlet box is inclined, and the acid outlet box is connected with an acid outlet pipe.

[0015] By adopting the above technical scheme, the concentrated sulfuric acid sprayed through the acid spraying pipe can naturally fall into the acid outlet box, and then flow into the acid outlet pipe and be discharged through the acid outlet pipe, thereby reducing the possibility of accumulation of concentrated sulfuric acid in the tower body.

[0016] Preferably, the acid outlet pipe extends out of the tower body at the end away from the acid outlet box, the end of the acid outlet pipe extending out of the tower body is connected with a filter pipe, and the filter pipe is provided with a filter plate.

[0017] By adopting the above technical scheme, the concentrated sulfuric acid in the acid outlet pipe can flow into the filter pipe, and the filter plate can filter out the impurities carried by the concentrated sulfuric acid during drying of the furnace gas, thereby facilitating subsequent use of the concentrated sulfuric acid.

[0018] Preferably, the filter pipe and the acid outlet pipe are detachably connected, flanges are mounted at both ends of the filter pipe, and the filter pipe and the acid outlet pipe are connected through the flanges.

[0019] By adopting the above technical scheme, when the filter plate is used for a long time, the operator needs to replace the filter plate, at which time the filter pipe can be detached to realize replacement of the filter plate, thereby facilitating filtration of the concentrated sulfuric acid by the filter plate.

[0020] Preferably, the filter pipe is connected with a first acid guide pipe through the flange, an acid pumping pump is mounted on the first acid guide pipe, a plurality of second acid guide pipes are arranged on the first acid guide pipe, and the second acid guide pipes are communicated with the acid inlet pipe.

[0021] Through the above technical scheme, the concentrated sulfuric acid passing through the filter pipe flows into the first acid guide pipe under the action of the acid pumping pump, and the concentrated sulfuric acid in the first acid guide pipe can flow into the acid inlet pipe through the second acid guide pipe, so as to facilitate the recycling of the concentrated sulfuric acid.

[0022] In summary, the present application includes at least one of the following beneficial technical effects:

[0023] 1. By arranging the inclined plates, acid inlet pipes and acid spraying pipes, the tower body is divided into multiple cavities by the multiple inclined plates, thereby prolonging the residence time of the sulfur-containing furnace gas in the tower, and the multiple acid inlet pipes and acid spraying pipes are arranged to improve the uniformity of the spraying, and the concentrated sulfuric acid can flow along the inclined plates, thereby prolonging the residence time of the concentrated sulfuric acid in the tower body and improving the drying efficiency of the sulfur-containing furnace gas.

[0024] 2. By arranging the acid outlet box and acid outlet pipe, the concentrated sulfuric acid sprayed through the acid spraying pipe can naturally fall into the acid outlet box, and then flow into the acid outlet pipe from the acid outlet box and be discharged through the acid outlet pipe, thereby reducing the possibility of accumulation of the concentrated sulfuric acid in the tower body.

[0025] 3. By arranging the first acid guide pipe and the second acid guide pipe, the concentrated sulfuric acid passing through the filter pipe flows into the first acid guide pipe under the action of the acid pumping pump, and the concentrated sulfuric acid in the first acid guide pipe can flow into the acid inlet pipe through the second acid guide pipe, so as to facilitate the recycling of the concentrated sulfuric acid. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic diagram of the internal structure of the tower body in the embodiment of the present application.

[0027] Figure 2 is a schematic diagram of the overall structure of the acid inlet pipe and the acid spraying pipe in the embodiment of the present application.

[0028] Figure 3 is a schematic diagram of the overall structure of the support rod and the baffle in the embodiment of the present application.

[0029] BRIEF DESCRIPTION OF DRAWINGS: 1, tower body; 11, air inlet pipe; 12, air outlet pipe; 2, inclined plate; 21, drying filler; 22, support rod; 23, baffle; 3, acid inlet pipe; 31, acid spraying pipe; 4, acid outlet box; 41, acid outlet pipe; 5, filter pipe; 51, filter plate; 52, flange; 6, first acid guide pipe; 61, acid pumping pump; 62, second acid guide pipe. DETAILED DESCRIPTION

[0030] To make the inventive objectives, features, and advantages of this application more apparent and understandable, the technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0031] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0032] This application discloses a drying tower for acid production from pyrite, such as... Figure 1 As shown, the tower body 1 is included, and multiple inclined plates 2 are fixedly connected inside the tower body 1. The inclined plates 2 are located on opposite sides of the inner wall of the tower body 1. The side of the inclined plate 2 away from the inner wall of the tower body 1 is inclined downward. The multiple inclined plates 2 are staggered along the height direction of the tower body 1.

[0033] like Figure 1 and 2 As shown, the tower body 1 is equipped with multiple acid inlet pipes 3, which are located on one side of the inner wall of the tower body 1 and distributed along the height direction of the tower body 1. Multiple acid spray pipes 31 are connected to the acid inlet pipes 3. The tower body 1 is divided into multiple cavities by the arrangement of multiple inclined plates 2. When sulfur-containing furnace gas enters the tower body 1, it passes through multiple cavities sequentially, increasing the residence time of the sulfur-containing furnace gas inside the tower. The multiple acid spray pipes 31 increase the concentration and uniformity of the concentrated sulfuric acid spray, and the concentrated sulfuric acid can fall from the upper inclined plate 2 to the lower inclined plate 2, also increasing the residence time of the concentrated sulfuric acid inside the tower body 1. This facilitates the full reaction of the concentrated sulfuric acid with the sulfur-containing furnace gas, improving the drying efficiency of the sulfur-containing furnace gas.

[0034] like Figure 1 As shown, the tower body 1 is equipped with an inlet pipe 11 and an outlet pipe 12. The inlet pipe 11 is located at the upper part of the tower body 1, and the outlet pipe 12 is located at the lower part of the tower body 1. This allows the sulfur-containing furnace gas to enter the tower body 1 from the upper part and flow out from the lower part of the tower body 1, thereby increasing the residence time of the sulfur-containing furnace gas in the tower and facilitating the drying of the sulfur-containing furnace gas.

[0035] like Figure 1 and 3 As shown, the inclined plate 2 is equipped with drying packing 21. A support rod 22 is fixedly connected to the side of the inclined plate 2 away from the inner wall of the tower body 1. A baffle 23 is fixedly connected to the end of the support rod 22 away from the inclined plate 2. The baffle 23 has several through holes. The baffle 23 can limit the drying packing 21, so that the drying packing 21 is stored on the inclined plate 2, which facilitates the drying of sulfur-containing furnace gas by the drying packing 21. The sulfur-containing furnace gas can also flow through the through holes of the baffle 23 to achieve the drying of sulfur-containing furnace gas.

[0036] like Figure 1 As shown, an acid outlet box 4 is fixedly connected to the bottom of the tower body 1. The bottom of the acid outlet box 4 is inclined, and an acid outlet pipe 41 is connected to the side of the acid outlet box 4 with a lower height. The end of the acid outlet pipe 41 away from the acid outlet box 4 extends out of the tower body 1. A filter pipe 5 is detachably connected to the end of the acid outlet pipe 41 extending out of the tower body 1. Both ends of the filter pipe 5 are equipped with flanges 52, and the filter pipe 5 is connected to the acid outlet pipe 41 through the flanges 52. The concentrated sulfuric acid in the tower body 1 can fall naturally into the acid outlet box 4 under the action of gravity, and flow from the acid outlet box 4 to the acid outlet pipe 41, and then through the acid outlet pipe 41 to the filter pipe 5. The filter plate 51 can filter out impurities carried by the concentrated sulfuric acid drying furnace gas, reducing the possibility of concentrated sulfuric acid accumulating in the tower body 1, and facilitating the subsequent use of concentrated sulfuric acid. When the filter plate 51 has been used for a long time, the operator needs to replace the filter plate 51. At this time, the filter pipe 5 can be removed to replace the filter plate 51, which facilitates the filtration of concentrated sulfuric acid by the filter plate 51.

[0037] like Figure 1 As shown, the end of the filter pipe 5 furthest from the acid outlet pipe 41 is connected to a first acid guide pipe 6 via a flange 52. An acid pump 61 is installed on the first acid guide pipe 6, and multiple second acid guide pipes 62 are provided on the first acid guide pipe 6. The second acid guide pipes 62 are connected to the acid inlet pipe 3. When concentrated sulfuric acid enters the filter pipe 5, it can flow into the first acid guide pipe 6 under the action of the acid pump 61. The concentrated sulfuric acid in the first acid guide pipe 6 can flow into the acid inlet pipe 3 through the second acid guide pipes 62. The concentrated sulfuric acid in the acid inlet pipe 3 can then re-enter the tower body 1 through the acid spray pipe 31, realizing the recycling of concentrated sulfuric acid and reducing resource waste.

[0038] The implementation principle of the pyrite-based acid drying tower in this application embodiment is as follows:

[0039] Sulfur-containing furnace gas enters tower 1 through the upper part and moves along the length of inclined plate 2. At this time, concentrated sulfuric acid is sprayed out from acid spray pipe 31. The concentrated sulfuric acid flows downward along inclined plate 2. The sulfur-containing furnace gas passes through multiple cavities in sequence and reacts with the drying packing 21 and concentrated sulfuric acid. The concentrated sulfuric acid in tower 1 can fall naturally into acid outlet box 4 under gravity and flow into filter pipe 5 through acid outlet pipe 41. Filter plate 51 can filter out impurities carried by the concentrated sulfuric acid drying furnace gas. Under the action of acid pump 61, it can flow into first acid guide pipe 6. The concentrated sulfuric acid in first acid guide pipe 6 can flow into acid inlet pipe 3 through second acid guide pipe 62. The concentrated sulfuric acid in acid inlet pipe 3 can re-enter tower 1 through acid spray pipe 31 to realize the recycling of concentrated sulfuric acid.

[0040] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A drying tower for acid production from pyrite, characterized in that: The tower body (1) includes a tower body (1) with multiple inclined plates (2) inside. The inclined plates (2) are inclined downward on the side away from the inner wall of the tower body (1). The tower body (1) has multiple acid inlet pipes (3) inside, and multiple acid spraying pipes (31) are connected to the acid inlet pipes (3).

2. The pyrite-based acid drying tower according to claim 1, characterized in that: Multiple inclined plates (2) are distributed along the height direction of the tower body (1), and multiple acid inlet pipes (3) are distributed along the height direction of the tower body (1).

3. The pyrite-based acid drying tower according to claim 1, characterized in that: The tower body (1) is provided with an air inlet pipe (11) and an air outlet pipe (12). The air inlet pipe (11) is located at the upper part of the tower body (1), and the air outlet pipe (12) is located at the lower part of the tower body (1).

4. The pyrite-based acid drying tower according to claim 1, characterized in that: The inclined plate (2) is provided with a drying filler (21), and a support rod (22) is fixedly connected to the inclined plate (2). A baffle (23) is fixedly connected to the support rod (22), and a through hole is provided on the baffle (23).

5. A pyrite-based acid drying tower according to claim 1, characterized in that: The bottom of the tower body (1) is provided with an acid outlet box (4), the bottom of the acid outlet box (4) is inclined, and an acid outlet pipe (41) is connected to the acid outlet box (4).

6. A pyrite-based acid drying tower according to claim 5, characterized in that: The acid outlet pipe (41) extends out of the tower body (1) at the end away from the acid outlet box (4). The end of the acid outlet pipe (41) extending out of the tower body (1) is connected to a filter pipe (5). A filter plate (51) is provided inside the filter pipe (5).

7. A pyrite-based acid drying tower according to claim 6, characterized in that: The filter tube (5) and the acid outlet tube (41) are detachably connected. Flanges (52) are installed at both ends of the filter tube (5), and the filter tube (5) and the acid outlet tube (41) are connected through the flanges (52).

8. A pyrite-based acid drying tower according to claim 7, characterized in that: The filter tube (5) is connected to a first acid guide tube (6) via a flange (52). An acid pump (61) is installed on the first acid guide tube (6). Multiple second acid guide tubes (62) are provided on the first acid guide tube (6). The second acid guide tubes (62) are connected to the acid inlet tube (3).

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