Recycling device for concentrated sulfuric acid

Abstract

The utility model discloses a recovery processing device for concentrated sulfuric acid, which belongs to the technical field of recovery processing of concentrated sulfuric acid and comprises a reaction tank, the top of the reaction tank is provided with an opening and is fixedly provided with a top cover, the bottom of the reaction tank is connected with a plurality of supporting columns for fixing, and an alkali material barrel is arranged in the center of the inside of the reaction tank. The side wall of the alkali material barrel is designed to be provided with a plurality of meshes, the top of the alkali material barrel is connected with the bottom of the top cover, a center rod is arranged in the center of the alkali material barrel in a penetrating mode, the periphery of the center rod is connected with two first supporting forks, the first supporting forks are connected with vortex blades, the periphery of the alkali material barrel is connected with an outer baffle ring, and the outer baffle ring is connected with an inner baffle ring. The outer baffle ring is hollow, a gap is formed between the outer baffle ring and the bottom of the reaction tank, and an outer ring spiral piece is arranged on the periphery of the outer baffle ring. According to the recovery treatment device for concentrated sulfuric acid, the reaction efficiency can be improved, and solid substances and hardened substances generated by reaction can be blocked and concentrated.

Description

Technical Field

[0001] The utility model belongs to the technical field of the recovery and treatment of concentrated sulfuric acid, in particular to a device for the recovery and treatment of concentrated sulfuric acid. Background Technique

[0002] Concentrated sulfuric acid is an aqueous solution of sulfuric acid with a mass fraction greater than or equal to 70%, commonly known as "bad water". Concentrated sulfuric acid has strong corrosiveness: under normal pressure, boiling concentrated sulfuric acid can corrode all metals except iridium and ruthenium, and the number of metal elements it can corrode even exceeds that of aqua regia. Similar to nitric acid, the reduction product may be sulfur dioxide, sulfur or sulfide depending on the type and amount of the reducing agent. Concentrated sulfuric acid is generally used in the treatment of chlorine, and the used concentrated sulfuric acid needs to be recycled and treated by special equipment. Generally, concentrated sulfuric acid is reacted with alkaline substances. However, when treating and recycling a large amount of concentrated sulfuric acid, since the compounds formed by the reaction of concentrated sulfuric acid and alkaline substances are mostly solid, it is easy to form a hardened layer, which isolates the remaining concentrated sulfuric acid from the alkaline substances, resulting in incomplete reaction of concentrated sulfuric acid and unable to ensure the treatment effect of concentrated sulfuric acid.

[0003] A device for the recovery and treatment of concentrated sulfuric acid for chlorine treatment with the publication number CN221046092U, by setting a rotating cylinder. When the device is in use, first place the alkali inside the treatment cylinder, then install the treatment cylinder inside the rotating cylinder, then send concentrated sulfuric acid into the treatment cylinder, and then start the motor. After the motor starts, its output shaft rotates, and the semi-gear on the surface of the output shaft drives the external toothed ring to rotate, thereby driving the rotating cylinder to rotate. When rotating the part without teeth, the rotating cylinder returns to its original position under the action of its own gravity, and then is driven to rotate again. Repeating this process can drive the substances inside the treatment cylinder to roll, thereby ensuring the full reaction of concentrated sulfuric acid and improving the practicability of the device. However, there is still room for improvement in its reaction effect. The present application designs another structure with better reaction effect for this point. Content of the Utility Model

[0004] The purpose of the utility model is to provide a device for the recovery and treatment of concentrated sulfuric acid to solve the problems raised in the background technique.

[0005] To achieve the above object, the present utility model provides the following technical solutions: A recovery and treatment device for concentrated sulfuric acid, including a reaction tank. The top of the reaction tank is open and fixed with a top cover, and the bottom of the reaction tank is connected with a plurality of support columns for fixing. A solid alkali cylinder is arranged at the center inside the reaction tank, and the side wall of the solid alkali cylinder is designed with a plurality of mesh holes. The top of the solid alkali cylinder is connected to the bottom of the top cover, and a central rod is arranged through the center of the solid alkali cylinder. Two first forks are connected to the outer periphery of the central rod, and the first forks are connected with eddy current blades. An outer retaining ring is connected to the outer periphery of the solid alkali cylinder, and the outer retaining ring is designed to be hollow and there is a gap between it and the bottom of the reaction tank. An outer ring spiral piece is arranged on the outer periphery of the outer retaining ring.

[0006] In a further embodiment, a feed hopper is installed at the center of the top of the top cover, and the feed hopper is communicated with the inside of the solid alkali cylinder.

[0007] In a further embodiment, a plurality of central stirring blades are connected to the outer peripheral part of the central rod passing through the solid alkali cylinder, and solid alkali is placed inside the solid alkali cylinder.

[0008] In a further embodiment, a connecting rod is connected to the top of the outer retaining ring, and the top end of the connecting rod is fixed to the bottom of the top cover.

[0009] In a further embodiment, the outer ring spiral piece is designed in a spiral structure, and the outer ring and the inner ring of the outer ring spiral piece are respectively in contact with the reaction tank and the outer retaining ring.

[0010] In a further embodiment, two second forks are connected to the outer periphery of the bottom end of the central rod, and the second forks are fixed to the outer ring spiral piece to realize driving rotation.

[0011] In a further embodiment, a rotating motor is connected to the center of the bottom of the reaction tank, and the driving end of the rotating motor is fixed to the bottom end of the central rod through a coupling.

[0012] In a further embodiment, a grounding plate is connected to the bottom of the support column, and the grounding plate is provided with grounding holes for fixing to the ground.

[0013] In a further embodiment, a filter plate is arranged at the lower half of the inner periphery of the outer retaining ring.

[0014] Compared with the prior art, the technical effects and advantages of the present utility model:

[0015] The design with the alkali material cylinder at the center and the design of the first fork and the eddy current blade, combined with the connection between the central rod and the fork, when the central rod rotates, a central eddy current will be generated, causing the concentrated sulfuric acid to generate an eddy current force and enabling it to uniformly contact the solid alkali inside the alkali material cylinder for uniform reaction. At the same time, since the outer retaining ring isolates the central area of its outer periphery, under the action of the eddy current force, the concentrated sulfuric acid can enter from the bottom gap, flow through the upper gap to the outside of the outer retaining ring, and then enter from the bottom again under the action of the eddy current force, further realizing the internal circulation, improving the uniformity of the reaction, and improving the reaction efficiency;

[0016] Since the reaction between concentrated sulfuric acid and alkaline substances easily forms a hardened layer, an outer ring spiral blade is provided on the outer periphery of the outer retaining ring. The outer ring spiral blade is adapted to the outer gap. When the central rod rotates, it drives the outer ring spiral blade to rotate through the second fork connected to the outer periphery of the bottom end of the central rod, which can further play a role in conveying the solid substance or the hardened layer, making it move to the bottom. Finally, through the design of the filter screen, the solid substance or the hardened layer can be blocked to avoid affecting the reaction;

[0017] The design of the central rod penetrating the alkali material cylinder and the connection design of the central stirring blade on the outer periphery of the central rod can further stir the solid alkali to assist the reaction;

[0018] The device for the recovery and treatment of concentrated sulfuric acid can not only achieve a more uniform reaction, improve the reaction efficiency, but also block and concentrate the solid substances and hardeners generated by the reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the following drawings are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0020] Figure 1 is a schematic structural diagram of the present invention;

[0021] Figure 2 is a central cross-sectional view of the present invention;

[0022] Figure 3 is a schematic structural diagram of the outer retaining ring of the present invention;

[0023] Figure 4 is of the present invention Figure 2 is an enlarged view of the structure at A in the present invention.

[0024] DESCRIPTION OF THE REFERENCE NUMERALS:

[0025] 1. Reaction tank; 2. Top cover; 3. Support column; 4. Alkali material cylinder; 5. Feed hopper; 6. Outer retaining ring; 7. Connecting rod; 8. Central rod; 9. First fork; 10. Eddy current blade; 11. Second fork; 12. Outer ring spiral sheet; 13. Filter plate; 14. Central stirring sheet; 15. Rotating motor. Detailed implementation manner

[0026] In the following description, a large number of specific details are given to provide a more thorough understanding of the present utility model. However, it is obvious to those skilled in the art that the present utility model can be implemented without one or more of these details. In other examples, in order to avoid confusion with the present utility model, some well-known technical features in the art are not described.

[0027] Unless otherwise defined, the up, down, left, right, front, back, inner and outer directions involved in this article are based on the up, down, left, right, front, back, inner and outer directions in the figures shown in the present utility model, which are hereby explained together.

[0028] The connection method can adopt existing methods such as bonding, welding, bolt connection, etc., depending on actual needs.

[0029] During the processing of the existing concentrated sulfuric acid treatment device, the compounds formed by the reaction of concentrated sulfuric acid with alkaline substances are mostly solid, which is easy to form a hardened layer, thus isolating the remaining concentrated sulfuric acid from the alkaline substances, resulting in incomplete reaction of the concentrated sulfuric acid and unable to ensure the treatment effect of the concentrated sulfuric acid. In view of this, a recovery treatment structure capable of isolating the hardened substances and transporting the solid substances through is designed, and the specific implementation scheme is as follows.

[0030] Please refer to Figures 1 to 4 , the recovery treatment device for concentrated sulfuric acid includes a reaction tank 1, a top cover 2 and a plurality of support columns 3. One side of the upper half of the reaction tank 1 or the part on the top cover 2 where feeding can be opened. The top of the reaction tank 1 is designed to be open. The top cover 2 is bolted to the top of the reaction tank 1 through a plurality of bolts. The plurality of support columns 3 are fixed to the bottom of the reaction tank 1 and are arranged in an array. The bottom of the support column 3 is connected with a grounding plate, and the grounding plate is provided with grounding holes for fixing to the ground, and grounding bolts are arranged in the grounding holes, etc.

[0031] Please refer to Figures 1 to 4 , in order to achieve uniform reaction, a rotating motor 15 is installed at the center of the bottom of the reaction tank 1. The driving end of the rotating motor 15 penetrates the reaction tank 1 and is connected with a central rod 8 through a coupling. A central alkali material cylinder 4 is arranged at the center of the reaction tank 1. The top of the alkali material cylinder 4 is connected to the center of the bottom of the top cover 2. The inside of the alkali material cylinder 4 is used to hold solid alkali and a plurality of mesh holes are opened on the side wall. In order to facilitate adding alkali, a feed hopper 5 is installed at the center of the top of the top cover 2. The feed hopper 5 is communicated with the inside of the alkali material cylinder 4;

[0032] The alkali barrel 4 is provided with solid alkali, which cannot pass through the mesh. The top of the central rod 8 passes through the alkali barrel 4. The peripheral portion of the central rod 8 is connected with a plurality of central stirring blades 14, which are used to stir the solid alkali to make it fully contact and react.

[0033] An outer baffle ring 6 is arranged on the periphery of the alkali barrel 4, and a connecting rod 7 is connected to the top of the outer baffle ring 6, and the connecting rod 7 is connected to the bottom of the top cover 2 to further fix the position of the outer baffle ring 6, and a gap through which concentrated sulfuric acid can pass is arranged on the top and bottom of the outer baffle ring 6, and two first forks 9 are connected to the periphery of the center rod 8, and the first forks 9 are connected to vortex blades 10;

[0034] When the central rod 8 rotates, the vortex blades 10 can be driven to rotate, thereby generating a vortex effect.

[0035] See also Figures 1 to 4 In order to avoid the influence of hardened materials and solid impurities, an outer ring spiral sheet 12 is arranged on the outer periphery of the outer retaining ring 6. The outer ring spiral sheet 12 is a spiral structure design. The outer circle and inner circle of the outer ring spiral sheet (12) are in contact with the reaction tank 1 and the outer retaining ring 6 respectively. Two second forks 11 are connected to the outer periphery of the bottom end of the center rod 8. The second forks 11 are fixed to the outer ring spiral sheet 12 to realize driving rotation. A filter plate 13 is arranged on the lower half of the inner periphery of the outer retaining ring 6.

[0036] The above-mentioned components and electrical equipment are all existing technologies or existing feasible technologies. The working principles, sizes and models are irrelevant to the functions of this application, so they are not described in detail, and they are all controlled by remote control switches.

[0037] How it works

[0038] The concentrated sulfuric acid recovery and treatment device is used to input the concentrated sulfuric acid into the reaction tank 1 when it is needed, and then input the solid alkali through the feed hopper 5;

[0039] The rotating motor 15 is started to drive the central rod 8 to rotate, so that the central stirring blade 14 stirs the solid alkali, and the vortex blade 10 on the outer periphery of the first fork 9 is rotated to generate vortex force, so that the concentrated sulfuric acid can enter from the bottom gap and then flow from the upper gap to the outside of the outer retaining ring 6, and then enter from the bottom again through the vortex force, so as to further realize the internal circulation;

[0040] At the same time, the rotation of the center rod 8 drives the second fork 11 to rotate, causing the outer ring spiral sheet 12 to rotate, further twisting the hardened material and solid matter produced by the reaction to be sent downward, and then blocked by the design of the filter plate 13, so that it will not affect the reaction of the remaining concentrated sulfuric acid and alkali, further improving the reaction efficiency.

[0041] It should be noted that in this text, relational terms such as "one" and "two" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising one..." does not exclude the existence of additional identical elements in the process, method, article or device comprising the said element.

[0042] Although the embodiments of the present utility model have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present utility model. The scope of the present utility model is defined by the appended claims and their equivalents.

Claims

1. A recovery and treatment device for concentrated sulfuric acid, comprising a reaction tank (1) containing concentrated sulfuric acid, wherein the top of the reaction tank (1) is open and fixed with a top cover (2), and the bottom of the reaction tank (1) is connected to a plurality of support columns (3) for fixing; Features: An alkali material cylinder (4) is arranged at the inner center of the reaction tank (1), and the side wall of the alkali material cylinder (4) is designed with a plurality of mesh holes. The top of the alkali material cylinder (4) is connected to the bottom of the top cover (2), and a central rod (8) is arranged through the center of the alkali material cylinder (4). Two first forks (9) are connected to the outer periphery of the central rod (8), and the first forks (9) are connected to vortex blades (10). The outer periphery of the alkali material cylinder (4) is connected to an outer retaining ring (6), and the outer retaining ring (6) is designed to be hollow and has a gap between it and the bottom of the reaction tank (1). The outer periphery of the outer retaining ring (6) is provided with an outer ring spiral sheet (12).

2. The recovery and processing device for concentrated sulfuric acid according to claim 1, characterized in that: A feed hopper (5) is installed at the top center of the top cover (2), and the feed hopper (5) is connected to the inside of the alkali material cylinder (4).

3. The recovery and processing device for concentrated sulfuric acid according to claim 1, characterized in that: The central rod (8) penetrates the outer peripheral part of the alkali material cylinder (4) and is connected to a plurality of central stirring blades (14), and the alkali material cylinder (4) contains solid alkali.

4. The recovery and processing device for concentrated sulfuric acid according to claim 3, characterized in that: The top of the outer retaining ring (6) is connected to a connecting rod (7), and the top end of the connecting rod (7) is fixed to the bottom of the top cover (2).

5. The recovery and treatment device for concentrated sulfuric acid according to claim 1, characterized in that: The outer ring spiral sheet (12) is designed to have a spiral structure, and the outer ring and inner ring of the outer ring spiral sheet (12) are in contact with the reaction tank (1) and the outer retaining ring (6) respectively.

6. The recovery and treatment device for concentrated sulfuric acid according to claim 5, characterized in that: Two second forks (11) are connected to the outer periphery of the bottom end of the central rod (8), and the second forks (11) are fixed to the outer ring spiral sheet (12) to achieve driving rotation.

7. The recovery and treatment device for concentrated sulfuric acid according to claim 1, characterized in that: A rotating motor (15) is connected to the center of the bottom of the reaction tank (1), and the driving end of the rotating motor (15) and the bottom end of the center rod (8) are fixed via a coupling.

8. The recovery and treatment device for concentrated sulfuric acid according to claim 1, characterized in that: The bottom of the support column (3) is connected to a grounding plate, and the grounding plate is provided with a grounding hole fixed to the ground.

9. The recovery and treatment device for concentrated sulfuric acid according to any one of claims 1 to 8, characterized in that: A filter plate (13) is provided on the lower half of the inner circumference of the outer retaining ring (6).

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