Pickling waste acid recycling device

Abstract

The utility model provides a pickling waste acid recycling device, which relates to the technical field of stainless steel pickling waste acid recycling, and comprises a treatment box, a filter channel, a support frame, a filter screen, a telescopic cylinder, a splash-proof shell, a feed hopper, a plugging plate, a corrosion-resistant hose and a suction pump, according to the device, the mounting and dismounting processes of the filter screen are convenient and fast, the filter screen cannot deviate in the subsequent filtering process after being mounted, and the filter screen can be quickly taken out to be replaced in cooperation with a telescopic cylinder and a tool after a round of filtering of waste acid in the pickling tank is completed; in addition, in the filtering process, the splash-proof shell is matched with the blocking plate, so that the phenomenon that waste acid splashes outwards can be effectively avoided, the waste acid is smoothly introduced into the splash-proof shell through the suction pump, then particulate matter such as oxide scales and metal chippings in the waste acid is effectively removed, and a basic guarantee is provided for cyclic utilization of the waste acid.

Description

A device for recycling pickling waste acid Technical Field

[0001] This utility model relates to the field of stainless steel pickling waste acid recycling technology, and more specifically, to a pickling waste acid recycling device. Background Technology

[0002] Stainless steel pickling is an industrial cleaning technology that generally uses pickling and passivation paste and pickling and passivation solution for treatment. The pickling and passivation paste is used to pickle and passivate simultaneously. Waste acid is generated in the stainless steel pickling process. The waste acid can be recycled and reused. Currently, the recycling of waste acid from stainless steel pickling requires a filtration process to remove particulate matter such as iron oxide scale and metal shavings from the waste acid, thereby avoiding subsequent damage to pumps, valves and reaction equipment.

[0003] Announcement No. CN221253956U proposes a waste acid recovery device for stainless steel pipe pickling. Although the device can clean the filter screen, the filter screen has a limited service life. The prior art does not allow for convenient and quick disassembly and replacement of the filter screen. Therefore, the waste acid particulate matter filtration process in the recycling of stainless steel pickling waste acid needs to be improved. Summary of the Invention

[0004] The purpose of this invention is to solve the problems mentioned in the background art and to propose a device for recycling pickling waste acid.

[0005] The technical solution adopted by this utility model to solve its technical problem is:

[0006] A device for recycling pickling waste acid includes a processing tank, a filter channel, a support frame, a filter screen, a telescopic cylinder, a splash guard, a feed hopper, a sealing plate, a corrosion-resistant hose, and a suction pump.

[0007] The filter channel is fixed on the upper surface of the treatment box and is connected to the inside of the treatment box;

[0008] The support frame, which is open at both the top and bottom, is fixed inside the filter channel, and the upper surface of the support frame is flush with the upper surface of the filter channel.

[0009] The filter screen is inserted into the support frame;

[0010] The telescopic cylinders are symmetrically fixed on the filter channel;

[0011] The open splash guard at the bottom is connected to the telescopic cylinder, and the splash guard is adapted to the size of the filter channel;

[0012] The feed hopper is fixed on the splash guard and connected to the inside of the splash guard;

[0013] The sealing plate is fixed at the feed inlet of the feed hopper, and the sealing plate and the suction pump are connected by a corrosion-resistant hose.

[0014] Furthermore, the filter screen is symmetrically provided with insert posts, and the support frame is provided with slots that correspond one-to-one with the insert posts and are adapted in size.

[0015] Furthermore, handles are symmetrically arranged on the filter screen.

[0016] Furthermore, a sealing frame lower than its bottom surface is fixedly provided in the bottom area of ​​the splash-proof shell, and a corrosion-resistant sealing gasket is provided circumferentially on the inner wall of the sealing frame. The corrosion-resistant sealing gasket is respectively attached to the outer wall of the splash-proof shell, the outer wall of the filter channel, and the joint gap between the splash-proof shell and the filter channel.

[0017] Furthermore, the support frame, insert column, splash guard, feed hopper, sealing plate, and handle are all made of 316L steel.

[0018] Furthermore, the filter screen is made of PE or PP.

[0019] Furthermore, the corrosion-resistant hose is made of polytetrafluoroethylene (PTFE).

[0020] Compared with the prior art, the beneficial effects of this utility model are:

[0021] Compared to existing technologies, the filter screen in this device is easy to install and remove. Once installed, the filter screen will not shift position during subsequent filtration processes. After filtering the waste acid in one round of pickling tank, it can be quickly removed and replaced with a telescopic cylinder and tools. In addition, the splash guard combined with the sealing plate can effectively prevent waste acid from splashing to the outside during the filtration process. The waste acid is smoothly passed into the splash guard by a suction pump, which effectively removes iron oxide scale, metal shavings and other particles from the waste acid, thus providing a basic guarantee for the recycling of waste acid. Attached Figure Description

[0022] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0023] Figure 2 is a schematic diagram of the splash-proof shell movement;

[0024] Figure 3 is a schematic diagram of the handle installation;

[0025] Figure 4 is a schematic diagram of the sealing frame installation;

[0026] Figure label:

[0027] 1. Processing box; 2. Filter channel; 3. Support frame; 4. Filter screen; 5. Insert column; 6. Slot; 7. Telescopic cylinder; 8. Splash shield; 9. Feed hopper; 10. Sealing plate; 11. Hoist; 12. Handle; 13. Sealing frame. Detailed Implementation

[0028] The technical solutions of the present utility model 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 the present utility model, and not all of them. 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 scope of protection of the present utility model. The present utility model will be further described with reference to the accompanying drawings and embodiments:

[0029] As shown in Figures 1 to 3, a pickling waste acid recycling device includes a processing tank 1, a filter channel 2, a support frame 3, a filter screen 4, a telescopic cylinder 7, a splash guard 8, a feed hopper 9, a sealing plate 10, a corrosion-resistant hose 11 (made of polytetrafluoroethylene hose to resist weak acid corrosion), and a suction pump.

[0030] The filter channel 2 is fixed on the upper surface of the processing box 1 and is connected to the inside of the processing box 1;

[0031] The support frame 3, which is open at both the top and bottom, is fixed inside the filter channel 2, and the upper surface of the support frame 3 is flush with the upper surface of the filter channel 2.

[0032] The filter screen 4 is inserted into the support frame 3 (specifically, the filter screen 4 is made of PE or PP filter screen, which are corrosion resistant and low in cost, and multiple spares can be used for replacement at any time).

[0033] The telescopic cylinder 7 is symmetrically fixed on the filter channel 2;

[0034] The lower open splash guard 8 is connected to the telescopic cylinder 7, and the end face size of the splash guard 8 is adapted to the end face size of the filter channel 2.

[0035] The feed hopper 9 is fixed on the splash guard 8 and is connected to the inside of the splash guard 8;

[0036] The sealing plate 10 is fixed to the feed inlet of the feed hopper 9, and the sealing plate 10 and the suction pump are connected through the corrosion-resistant hose 11 (specifically, the end of the suction pump away from the feed hopper 9 is connected to the stainless steel pickling tank, and neither the suction pump nor the stainless steel pickling tank is shown in the figure).

[0037] To improve the stability of the filter screen 4 during the filtration of large particles in waste acid, the above embodiment is further refined as shown in Figures 1 and 2. The filter screen 4 is symmetrically provided with insert posts 5, and the support frame 3 is provided with slots 6 that correspond one-to-one with the insert posts 5 and are adapted in size.

[0038] To make the disassembly process of filter screen 4 more convenient, the design has been further optimized as shown in Figure 3, with handles 12 symmetrically arranged on filter screen 4.

[0039] In order to extend the service life of each component in this application, the scheme is further refined so that the support frame 3, the insert column 5, the splash guard 8, the feed hopper 9, the sealing plate 10 and the handle 12 are all made of 316L steel.

[0040] It should be noted that the telescopic cylinder 7 and the suction pump are electrically connected to the controller, which is not shown in the figure, but is specifically located on the processing box 1.

[0041] The working process of this utility model:

[0042] Initially, the telescopic cylinder 7 is operated by the controller to move the splash shield 8 to a pre-set position (as shown in Figure 2 of the instruction manual). Then, a filter screen 4 is picked up and the insertion post 5 is aligned with the slot 6 to complete the accurate docking of the filter screen 4 and the support frame 3. The purpose of this is to avoid horizontal movement of the filter screen 4 during the subsequent filtration of waste acid, and the waste acid falls smoothly onto the filter screen 4. It should be noted that the waste acid filtered in this application is a weak acid.

[0043] After the filter screen 4 is installed, the controller controls the telescopic cylinder 7 to retract so that the end face of the splash shield 8 is aligned with the end face of the filter channel 2 (the two are of compatible size and are aligned as shown in Figure 1 of the instruction manual). At this time, the telescopic cylinder 7 stops, and the controller controls the suction pump to work so that the waste acid in the pickling tank can be smoothly sucked and transferred to the inside of the splash shield 8. Then the waste acid can flow through the filter screen 4. At this time, the iron oxide scale, metal shavings and other particles in the waste acid will remain on the surface of the filter screen 4. The remaining impurities that have been removed from the particles flow through the filter screen 4 and are injected into the treatment box 1 for further processing.

[0044] After filter screen 4 completes one round of waste acid filtration in the stainless steel pickling tank, the splash guard 8 is moved to the position shown in Figure 2 of the instruction manual by the controller. Then, with the help of a tool and handle 12, filter screen 4 can be quickly separated from support frame 3 (the tool is pliers to avoid direct contact with filter screen 4 by hand). Then, a new filter screen 4 is installed and replaced, and splash guard 8 is reconnected with filter channel 2 to start a new round of stainless steel pickling waste acid filtration process.

[0045] To further improve the sealing effect after the splash-proof shell 8 and the filter channel 2 are connected end to end, in some embodiments, as shown in Figure 4, a sealing frame 13 lower than its bottom surface is fixed in the bottom area of ​​the splash-proof shell 8. A corrosion-resistant sealing gasket (not shown in the figure) is provided circumferentially on the inner wall of the sealing frame 13. The corrosion-resistant sealing gasket is in contact with the outer wall of the splash-proof shell 8, the outer wall of the filter channel 2 and the joint gap between the splash-proof shell 8 and the filter channel 2.

[0046] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The descriptions of the above embodiments and specifications are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by this utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for recycling pickling waste acid, comprising a treatment tank (1), characterized in that, It also includes a filter channel (2), a support frame (3), a filter screen (4), a telescopic cylinder (7), a splash guard (8), a feed hopper (9), a sealing plate (10), a corrosion-resistant hose (11), and a suction pump. The filter channel (2) is fixed to the upper surface of the processing box (1) and is connected to the inside of the processing box (1). The support frame (3), which is open at both the top and bottom, is fixed inside the filter channel (2), and the upper surface of the support frame (3) is flush with the upper surface of the filter channel (2). The filter screen (4) is inserted into the support frame (3); the telescopic cylinder (7) is symmetrically fixed on the filter channel (2); the lower open splash shell (8) is connected to the telescopic cylinder (7), and the splash shell (8) is adapted to the size of the filter channel (2); the feed hopper (9) is fixed on the splash shell (8) and connected to the inside of the splash shell (8); the sealing plate (10) is fixed at the feed inlet of the feed hopper (9), and the sealing plate (10) and the suction pump are connected through the corrosion-resistant hose (11).

2. The pickling waste acid recycling device according to claim 1, characterized in that, The filter screen (4) is symmetrically provided with inserts (5), and the support frame (3) is provided with slots (6) that correspond one-to-one with the inserts (5) and are adapted in size.

3. The pickling waste acid recycling device according to claim 2, characterized in that, The filter screen (4) is symmetrically provided with handles (12).

4. The pickling waste acid recycling device according to claim 1, characterized in that, The bottom area of ​​the splash shield (8) is fixed with a sealing frame (13) lower than its bottom surface. The inner wall of the sealing frame (13) is provided with a corrosion-resistant sealing gasket in the circumferential direction. The corrosion-resistant sealing gasket is in contact with the outer wall of the splash shield (8), the outer wall of the filter channel (2), and the joint gap between the splash shield (8) and the filter channel (2).

5. The pickling waste acid recycling device according to claim 3, characterized in that, The support frame (3), insert column (5), splash guard (8), feed hopper (9), sealing plate (10) and handle (12) are all made of 316L steel.

6. The pickling waste acid recycling device according to claim 1, characterized in that, The filter screen (4) is a PE filter screen or a PP filter screen.

7. The pickling waste acid recycling device according to claim 1, characterized in that, The corrosion-resistant hose (11) is made of polytetrafluoroethylene (PTFE).

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