A concentrated sulfuric acid purification device for sulfuric acid production

Abstract

This utility model relates to the technical field of concentrated sulfuric acid purification devices, specifically a concentrated sulfuric acid purification device for sulfuric acid production. It includes a support frame, inside which is a sulfuric acid tank. Inside the sulfuric acid tank is a filter frame, inside which is a fixing plate. At the top of the fixing plate is a rotating shaft connected to a cover plate. At the top of the filter frame is a positioning block, and at the top of the positioning block is a handle. At the top of the sulfuric acid tank is a cap, inside which is an input pipe. The sulfuric acid tank is connected to a delivery pipe. By utilizing the structure of a cap, input pipe, delivery pipe, baffle, connecting block, connecting shaft, motor, rotating shaft, through pipe, vibrator, and purification chamber, this invention solves the problems of manual rotation of the bottle to control the dripping hole, which relies on manual operation, making precise flow rate adjustment difficult, and the tendency for concentrated sulfuric acid to clog the dripping hole when the viscosity of the concentrated sulfuric acid is high. Furthermore, the filter plate insertion / removal design can easily lead to leakage of concentrated sulfuric acid.

Description

Technical Field

[0001] This utility model relates to the technical field of concentrated sulfuric acid purification devices, specifically a concentrated sulfuric acid purification device for sulfuric acid production. Background Technology

[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 is highly corrosive; under normal pressure, boiling concentrated sulfuric acid can corrode all metals except iridium and ruthenium. The number of metals it can corrode even exceeds that of aqua regia (although the corrosion rates vary). Sulfuric acid has strong oxidizing properties at high concentrations, which is one of the biggest differences between it and dilute sulfuric acid. It also possesses dehydrating, non-volatile, acidic, and hygroscopic properties, similar to nitric acid. The reduction products, depending on the type and amount of reducing agent, may be sulfur dioxide, elemental sulfur, or sulfides. However, it may contain some impurity ions, such as iron ions, copper ions, and manganese ions. Current technologies for purifying impurities in concentrated sulfuric acid mostly employ activated carbon adsorption, but most of these methods do not remove solid impurities from the concentrated sulfuric acid beforehand, which can easily affect subsequent purification.

[0003] Furthermore, the application document with publication number CN220460027U mentions a concentrated sulfuric acid purification device for sulfuric acid production. This device involves pouring concentrated sulfuric acid into the filter box through the inlet hole, filtering solid impurities through the first and second filter plates, and then allowing it to enter the purification box to react with activated carbon to remove organic impurities, trace metal ions, and other impurities. After use, the first and second filter plates are pulled out of their slots by holding the handle for cleaning. After the concentrated sulfuric acid enters through the connecting pipe, the speed at which the concentrated sulfuric acid enters the purification box is controlled by rotating the rotating bottle to align the opening with the dripping holes of different sizes in the collection bottle. However, there are still some defects that need to be optimized. The specific defects are as follows: the design of manually rotating the bottle to control the dripping holes relies on manual operation, making it difficult to accurately adjust the flow rate; the dripping holes are easily blocked when the concentrated sulfuric acid has a high viscosity; and the filter plate insertion and removal design makes it easy for concentrated sulfuric acid to leak.

[0004] Therefore, it is particularly important to design a concentrated sulfuric acid purification device for sulfuric acid production to overcome the above-mentioned technical defects and improve overall practicality. Utility Model Content

[0005] The purpose of this invention is to provide a concentrated sulfuric acid purification device for sulfuric acid production, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A concentrated sulfuric acid purification device for sulfuric acid production includes a support frame, a sulfuric acid tank inside the support frame, a filter frame inside the sulfuric acid tank, a fixing plate inside the filter frame, a rotating shaft at the top of the fixing plate, a cover plate connected to the rotating shaft, a positioning block at the top of the filter frame, a handle at the top of the positioning block, a cover cylinder at the top of the sulfuric acid tank, an input pipe penetrating through the inside of the cover cylinder, and a conveying pipe connected to the sulfuric acid tank.

[0008] The conveying pipe has a baffle inside, a connecting block at the bottom of the baffle, a connecting shaft on one side of the connecting block, a motor at one end of the connecting shaft, a rotating shaft on the other side of the connecting block, a through pipe at the bottom of the conveying pipe, a vibrator outside the through pipe, and a purification box at the bottom end of the through pipe.

[0009] As a preferred embodiment of this utility model, the sulfuric acid barrel is provided with an clearance groove inside, and the clearance groove is provided with a positioning hole for matching the positioning block.

[0010] As a preferred embodiment of this utility model, the bottom of the filter frame is provided with a plurality of filter holes, the cover plate can rotate along the central axis of the rotating shaft, the filter frame is made of Hastelloy alloy, and the fixing plate and the cover plate are provided with a plurality of filter ports.

[0011] As a preferred embodiment of this utility model, the cover cylinder and the sulfuric acid barrel are connected by a locking buckle, the fixing plate is provided with a slot, the bottom end of the cover plate is provided with a locking block, and the locking block is compatible with the slot.

[0012] As a preferred embodiment of this utility model, one end of the rotating shaft and the connecting shaft is connected to the conveying pipe through a bearing seat, the inner wall of the conveying pipe is provided with a corrosion-resistant polytetrafluoroethylene coating, and an angle sensor is provided on the output shaft of the motor.

[0013] As a preferred embodiment of this utility model, both the input pipe and the delivery pipe are made of stainless steel and are wrapped with an aluminum silicate fiber insulation layer.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] 1. This utility model provides a concentrated sulfuric acid purification device for sulfuric acid production. Utilizing a structure consisting of a screw cap, input pipe, delivery pipe, baffle, connecting block, connecting shaft, motor, rotating shaft, through pipe, vibrator, and purification tank, concentrated sulfuric acid enters the sulfuric acid tank through the input pipe. Large particles of impurities are trapped by the fixed plate of the filter frame, and then undergo secondary filtration through the bottom filter holes. During cleaning, the locking cap is opened, and the filter frame is lifted and moved for disposal. When the sulfuric acid is transported through the delivery pipe, the motor drives the baffle to adjust the flow rate, and the external vibrator vibrates at high frequency to prevent clogging. Finally, the sulfuric acid flows smoothly into the purification tank for further deep processing. This invention solves the problems of manual rotation of the bottle to control the dripping hole, which relies on manual operation and makes precise flow rate adjustment difficult. It also addresses the issues of the dripping hole being easily clogged when the concentrated sulfuric acid has high viscosity, and the easy leakage of concentrated sulfuric acid due to the filter plate insertion / removal design. Attached Figure Description

[0016] Figure 1 This is a plan view of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the filter frame assembly of this utility model;

[0018] Figure 3 This is a schematic diagram of the baffle assembly of this utility model;

[0019] Figure 4 This is a structural schematic diagram of the fixing plate assembly of this utility model.

[0020] In the diagram: 1. Support frame; 101. Sulfuric acid tank; 102. Filter frame; 103. Fixing plate; 104. Rotating shaft; 105. Cover plate; 106. Positioning block; 107. Handle; 108. Cover cylinder; 109. Input pipe; 2. Delivery pipe; 201. Baffle; 202. Connecting block; 203. Connecting shaft; 204. Motor; 205. Rotating shaft; 206. Through pipe; 207. Vibrator; 208. Purification box. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0022] To facilitate understanding of this utility model, a more comprehensive description will be given below with reference to the accompanying drawings. Several embodiments of this utility model are provided. However, this utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this utility model will be more thorough and complete.

[0023] It should be noted that when a component is said to be "fixed to" another component, it can be directly on the other component or there may be an intervening component. When a component is said to be "connected to" another component, it can be directly connected to the other component or there may be an intervening component. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0024] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0025] For examples, please refer to Figure 1-3 This utility model provides a technical solution:

[0026] A concentrated sulfuric acid purification device for sulfuric acid production includes a support frame 1. Inside the support frame 1 is a sulfuric acid tank 101. Inside the sulfuric acid tank 101 is a filter frame 102. Inside the filter frame 102 is a fixing plate 103. A rotating shaft 104 is located at the top of the fixing plate 103, and the rotating shaft 104 is connected to a cover plate 105. A positioning block 106 is located at the top of the filter frame 102, and a handle 107 is located at the top of the positioning block 106. A cover cylinder 108 is located at the top of the sulfuric acid tank 101, and an input pipe 109 passes through the interior of the cover cylinder 108. The sulfuric acid tank 101 is connected to a conveying pipe 2. Inside the conveying pipe 2 is a baffle 201, and at the bottom of the baffle 201 is a connecting block 202. A connecting shaft 203 is located on one side of the connecting block 202, and a motor 204 is located at one end of the connecting shaft 203. A rotating shaft 205 is located on the other side of the connecting block 202. A through pipe is located at the bottom of the conveying pipe 2. 206. A vibrator 207 is installed on the outside of the pipe 206, and a purification box 208 is installed at the bottom of the pipe 206. Concentrated sulfuric acid enters the sulfuric acid tank 101 through the input pipe 109. It undergoes preliminary solid-liquid separation through the fixed plate 103 inside the filter frame 102. Large particles of impurities are trapped on the surface of the fixed plate 103 and then filtered again through the filter holes at the bottom of the filter frame 102. When the filter frame 102 needs to be cleaned, the locking cover cylinder 108 can be opened, and then the filter frame 102 can be lifted and transferred for cleaning using the handle 107. When the sulfuric acid is transported through the conveying pipe 2, the motor 204 can drive the baffle 201 to rotate, control the rotation angle of the baffle 201, and control the flow rate of the concentrated sulfuric acid. At the same time, the vibrator 207 outside the pipe 206 generates high-frequency vibration to ensure that the sulfuric acid flows smoothly into the purification box 208 and prevents blockage. Then the concentrated sulfuric acid smoothly enters the purification box for subsequent purification.

[0027] The sulfuric acid tank 101 has an internal clearance groove with positioning holes for matching the positioning block 106, facilitating the positioning of the filter frame. The bottom of the filter frame 102 has several filter holes. The cover plate 105 can rotate along the central axis of the rotating shaft 104. The filter frame 102 is made of Hastelloy alloy. The fixing plate 103 and the cover plate 105 have several filter ports. Hastelloy alloy has excellent corrosion resistance and high-temperature strength, which can resist the strong corrosion of concentrated sulfuric acid and extend the service life of the filter frame. The cover cylinder 108 is connected to the sulfuric acid tank 101 by a locking buckle. The locking connection of 01 replaces the traditional bolt fixing, realizing quick opening and closing. The fixing plate 103 is provided with a slot, and the bottom of the cover plate 105 is provided with a block. The block and the slot are compatible. One end of the rotating shaft 205 and the connecting shaft 203 are connected to the conveying pipe 2 through a bearing seat. The inner wall of the through pipe 206 is provided with a corrosion-resistant polytetrafluoroethylene coating. The output shaft of the motor is provided with an angle sensor to reduce the risk of leakage caused by pipe wall corrosion. Both the input pipe 109 and the conveying pipe 2 are made of 316L stainless steel and are wrapped with an aluminum silicate fiber insulation layer to meet the needs of conveying high-temperature concentrated sulfuric acid and reduce the frequency of pipe replacement.

[0028] The working process of this utility model is as follows: When using this concentrated sulfuric acid purification device for sulfuric acid production, concentrated sulfuric acid first enters the sulfuric acid tank 101 through the input pipe 109. It undergoes preliminary solid-liquid separation through the fixed plate 103 inside the filter frame 102, with large particles of impurities trapped on the surface of the fixed plate 103. Subsequently, it is filtered again through the filter holes at the bottom of the filter frame 102. When the filter frame 102 needs to be cleaned, the locking cover cylinder 108 can be opened, and then the filter frame 102 can be lifted and transferred for cleaning using the handle 107. When the sulfuric acid is transported through the conveying pipe 2, the motor 204 can drive the baffle 201 to rotate, controlling the rotation angle of the baffle 201 and controlling the flow rate of the concentrated sulfuric acid. At the same time, the vibrator 207 outside the through pipe 206 generates high-frequency vibration to ensure that the sulfuric acid flows smoothly into the purification tank 208 and prevents blockage. Afterward, the concentrated sulfuric acid smoothly enters the purification tank for subsequent purification. Adsorbent can be placed inside the fixed plate for adsorption according to actual needs.

[0029] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment all adopt conventional models in the prior art. Among them, the lead screw assembly, motor and electric push rod are existing mature equipment. The control method is through the control panel. The control circuit of the controller panel can be implemented by a person skilled in the art through simple circuit connection. It is common knowledge in the field. Therefore, this application will not explain the control method and circuit connection in detail.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A concentrated sulfuric acid purification device for sulfuric acid production, comprising a support frame (1), characterized in that: The support frame (1) is equipped with a sulfuric acid tank (101) inside. The sulfuric acid tank (101) is equipped with a filter frame (102) inside. The filter frame (102) is equipped with a fixing plate (103) inside. The top of the fixing plate (103) is equipped with a rotating shaft (104). The rotating shaft (104) is connected to a cover plate (105). The top of the filter frame (102) is equipped with a positioning block (106). The top of the positioning block (106) is equipped with a handle (107). The top of the sulfuric acid tank (101) is equipped with a cover cylinder (108). An input pipe (109) is inserted through the inside of the cover cylinder (108). The sulfuric acid tank (101) is connected to a conveying pipe (2). The conveying pipe (2) is provided with a baffle (201) inside, and a connecting block (202) is provided at the bottom of the baffle (201). A connecting shaft (203) is provided on one side of the connecting block (202). A motor (204) is provided at one end of the connecting shaft (203). A rotating shaft (205) is provided on the other side of the connecting block (202). A through pipe (206) is provided at the bottom of the conveying pipe (2). A vibrator (207) is provided on the outside of the through pipe (206). A purification box (208) is provided at the bottom end of the through pipe (206).

2. The concentrated sulfuric acid purification device for sulfuric acid production according to claim 1, characterized in that: The sulfuric acid tank (101) has an internal clearance groove, and the internal clearance groove has a positioning hole for matching the positioning block (106).

3. The concentrated sulfuric acid purification device for sulfuric acid production according to claim 1, characterized in that: The bottom of the filter frame (102) is provided with several filter holes, the cover plate (105) can rotate along the central axis of the rotating shaft (104), the filter frame (102) is made of Hastelloy alloy, and the fixing plate (103) and the cover plate (105) are provided with several filter ports.

4. A concentrated sulfuric acid purification device for sulfuric acid production according to claim 1, characterized in that: The cover cylinder (108) and the sulfuric acid tank (101) are connected by a locking buckle. The fixing plate (103) is provided with a slot, and the bottom end of the cover plate (105) is provided with a locking block. The locking block and the slot are compatible.

5. A concentrated sulfuric acid purification device for sulfuric acid production according to claim 1, characterized in that: One end of the rotating shaft (205) and the connecting shaft (203) are connected to the conveying pipe (2) through a bearing seat. The inner wall of the through pipe (206) is provided with a corrosion-resistant polytetrafluoroethylene coating. An angle sensor is provided on the output shaft of the motor (204).

6. A concentrated sulfuric acid purification device for sulfuric acid production according to claim 1, characterized in that: Both the input pipe (109) and the delivery pipe (2) are made of 316L stainless steel and are wrapped with an aluminum silicate fiber insulation layer.

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