A device for treating bismuth-containing acidic wastewater

Abstract

The utility model relates to industrial wastewater treatment and resource recovery technical field especially, more particularly to a device for bismuth-containing acid wastewater treatment, including wastewater pool, the bottom symmetry of wastewater pool is fixed with bottom platform, the inner wall of wastewater pool is fixedly installed with support frame, the upper end of support frame is covered with the precipitation net, the lower end of one side of wastewater pool is fixedly penetrated with circulating pipe, the outer wall of wastewater pool is fixedly installed with circulating pump through support in circulating pipe. The scheme sets up the circulating pipeline in wastewater pool bottom, and is equipped with circulating pump, and circulating pump can continuously pump out wastewater of pool bottom, and then through the return pipe, it is transported back to the upper port of wastewater pool, and this process forms a sustained liquid circulation flow, and this circulation flow breaks the static stratification of water body, so that the newly added acid-base adjusting liquid or other treatment reagent can be fully, fast mixed with wastewater, avoids the phenomenon that local concentration is too high or too low.

Description

Technical Field

[0001] This utility model relates to the field of industrial wastewater treatment and resource recycling technology, and in particular to a device for treating bismuth-containing acidic wastewater. Background Technology

[0002] The production of bismuth-containing pharmaceuticals and chemical products, such as potassium bismuth citrate, generates large quantities of complex, highly acidic (with extremely low pH values) industrial wastewater containing the valuable metal bismuth. Direct discharge of this wastewater not only severely corrodes sewer pipes and causes serious environmental pollution, but also wastes the strategic metal resource of bismuth.

[0003] Currently, the conventional treatment method for this type of acidic bismuth-containing wastewater is manual neutralization. This involves operators, relying on experience, intermittently adding alkaline substances such as sodium hydroxide to the wastewater tank, and using portable pH test strips or instruments for rough monitoring, repeatedly adjusting the pH until the wastewater's pH value approaches neutral. During neutralization, bismuth ions form insoluble precipitates such as bismuth hydroxide, which are discharged along with the supernatant as waste into subsequent water treatment systems or the external environment. However, the above processing method still has problems: 1. Manual operation cannot achieve real-time and precise pH control, which easily leads to problems such as insufficient addition (wastewater remains acidic) or excessive addition (wastewater becomes alkaline). Inaccurate pH control may result in incomplete bismuth precipitation, affecting the recovery rate, and even causing the effluent quality to fail to meet standards, posing environmental risks. 2. Existing processes only focus on the harmless treatment (neutralization) of wastewater, completely neglecting the recovery of metallic bismuth contained in the wastewater. Valuable bismuth resources are discarded along with the precipitates, causing direct economic losses and failing to meet the requirements of current green circular economy and sustainable development. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a device for treating bismuth-containing acidic wastewater.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a device for treating bismuth-containing acidic wastewater, comprising a wastewater tank, a base platform symmetrically fixed at the bottom of the wastewater tank, a support frame fixedly installed on the inner wall of the wastewater tank, and a sedimentation net covering the upper end of the support frame; A circulation pipe is fixed through the lower end of one side of the wastewater tank. A circulation pump is fixedly installed on the outer wall of the circulation pipe by a bracket. The inlet end of the circulation pump is connected to the end flange of the circulation pipe. The outlet flange of the circulation pump is connected to a return pipe. The return pipe is located above the port of the wastewater tank. An acid-base regulating solution interface is fixedly installed on the side of the wastewater tank away from the circulation pipe. A solenoid valve is installed on the acid-base regulating solution interface, and the valve core of the solenoid valve is embedded inside the acid-base regulating solution interface. A pH measuring probe is fixedly installed on the lower side wall of the wastewater tank.

[0006] Preferably, a waste discharge port is fixedly installed at the lower end of the wastewater tank, and a second solenoid valve is installed near the wastewater tank at the waste discharge port. The valve core of the second solenoid valve is embedded inside the waste discharge port.

[0007] Preferably, a conveying interface is fixedly installed through one side of the lower end of the wastewater pool, and a solenoid valve three is installed on the conveying interface, with the valve core of the solenoid valve three embedded inside the conveying interface.

[0008] Preferably, the flange at the end of the conveying interface furthest from the wastewater tank is connected to a filter cartridge, and the flange at the other end of the filter cartridge is connected to a transition interface for connection to the next-stage conveying pump.

[0009] Preferably, an annular frame is slidably fitted inside the filter cartridge, and a filter bag is embedded and fixed inside the annular frame. Several limiting plates are distributed and fixed on the upper end of the inner wall of the filter cartridge, and one side of the annular frame is tightly attached to the surface of the limiting plate.

[0010] Preferably, a threaded post is fixedly installed on the surface of the limiting plate, and an inner sleeve is fixedly installed through the surface of the annular frame, with the surface of the threaded post and the inside of the inner sleeve being slidably connected.

[0011] Preferably, a threaded cap is threaded onto the end of the threaded column, and one end of the threaded cap is tightly fitted against the end face of the inner sleeve.

[0012] The design scheme proposed in this utility model has the following beneficial effects in application: 1. This solution involves installing a circulation pipe at the bottom of the wastewater tank and equipping it with a circulation pump. The circulation pump continuously pumps out the wastewater from the bottom of the tank and then transports it back to the upper port of the wastewater tank through the return pipe. This process forms a continuous liquid circulation flow. This circulation flow breaks the static stratification of the water body, allowing newly added acid-base adjustment solutions or other treatment agents to mix fully and quickly with the wastewater, avoiding the phenomenon of excessively high or low local concentrations. As a result, the agents react more completely with the pollutants in the wastewater, thereby improving the overall efficiency and effect of the neutralization or precipitation reaction, and ensuring the stability and reliability of the treatment process. 2. A pH measuring probe is installed on the side wall of the wastewater tank to monitor the acidity and alkalinity level of the wastewater in real time. At the same time, a controlled solenoid valve is installed on the pipe interface connected to the external acid and alkalinity adjustment solution storage container. The system can automatically determine whether acidic or alkaline adjustment solution needs to be added based on the real-time data fed back by the pH probe, and control the opening and closing of the solenoid valve to perform precise dosing. 3. Before being discharged, the treated wastewater flows through an independent filter cartridge. The filter cartridge contains a detachable filter bag assembly, which is fixed by an annular frame and uses a simple mechanical structure of threaded post, inner sleeve and threaded cap to achieve quick installation and locking with the filter cartridge. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a bottom view of the overall bottom of this utility model; Figure 3 This is a schematic diagram of the internal structure of the present invention; Figure 4 This is a schematic diagram of the internal structure of the filter cartridge of this utility model.

[0014] In the diagram: 1. Wastewater tank; 11. Base platform; 12. Support frame; 13. Sedimentation screen; 14. Circulation pipe; 15. Circulation pump; 16. Return pipe; 17. Acid-base adjustment solution interface; 18. Solenoid valve one; 19. pH measurement probe; 2. Waste discharge interface; 21. Solenoid valve two; 3. Conveying interface; 31. Solenoid valve three; 32. Filter cartridge; 33. Transition interface; 301. Annular frame; 302. Filter bag; 303. Limiting plate; 304. Threaded column; 305. Internal sleeve; 306. Threaded cap. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0016] Example 1 Reference Figures 1-4 An apparatus for treating bismuth-containing acidic wastewater includes a wastewater tank 1, with a base platform 11 symmetrically fixed to the bottom of the wastewater tank 1. A support frame 12 is fixedly installed on the inner wall of the wastewater tank 1, and a sedimentation screen 13 is covered on the upper end of the support frame 12. The sedimentation screen 13 filters impurities during the wastewater treatment circulation, making the liquid output from the wastewater tank 1 cleaner. The support frame 12 facilitates the installation of the sedimentation screen 13. The sedimentation screen 13 is made of metal and is assembled with the support frame 12 by screws. The sedimentation screen 13 can be disassembled, cleaned, or replaced periodically. A circulation pipe 14 is fixed through the lower end of one side of the wastewater tank 1. A circulation pump 15 is fixedly installed on the outer wall of the circulation pipe 14 by a bracket. The inlet end of the circulation pump 15 is connected to the end flange of the circulation pipe 14, and the outlet end flange of the circulation pump 15 is connected to a return pipe 16. The return pipe 16 is located above the port of the wastewater tank 1. During wastewater treatment, the circulation pipe 14 draws the wastewater out through the circulation pump 15 and returns it to the wastewater tank 1 through the return pipe 16. Through a circulation process, the mixing effect of wastewater and treatment liquid can be improved. An acid-base regulating solution interface 17 is fixedly installed on the side of the wastewater tank 1 away from the circulation pipe 14. A solenoid valve 18 is installed on the acid-base regulating solution interface 17, and the valve core of the solenoid valve 18 is embedded inside the acid-base regulating solution interface 17. A pH measuring probe 19 is fixedly installed at the lower end of the side wall of the wastewater tank 1. The acid-base regulating solution interface 17 is connected to an external container for storing acid-base regulating solution through a pipe. According to the acid-base test results of the pH measuring probe 19, the external acid-base regulating solution container can add acidic or alkaline treatment solution according to the acid-base condition.

[0017] The wastewater tank 1 has a waste discharge port 2 fixed through its lower end. A solenoid valve 21 is installed near the wastewater tank 1 at the waste discharge port 2. The valve core of the solenoid valve 21 is embedded inside the waste discharge port 2. During long-term treatment of the wastewater tank 1, in order to facilitate the discharge of dirt after rinsing the bottom of the wastewater tank 1, the solenoid valve 21 can be opened to discharge waste liquid through the waste discharge port 2.

[0018] Among them, a conveying interface 3 is fixed through the lower end of one side of the wastewater pool 1. A solenoid valve 31 is installed on the conveying interface 3. The valve core of the solenoid valve 31 is embedded inside the conveying interface 3. The conveying interface 3 can facilitate the conveying of the treated wastewater to the next level.

[0019] Among them, the flange of the conveying interface 3 away from the wastewater tank 1 is connected to the filter cartridge 32, and the flange of the other end of the filter cartridge 32 is connected to the transition interface 33 for connecting to the next stage conveying pump. The filter cartridge 32 can isolate and collect bismuth-containing precipitates, and the transition interface 33 can facilitate connection to the next stage.

[0020] The filter cartridge 32 has an annular frame 301 that is slidably fitted inside. A filter bag 302 is embedded and fixed inside the annular frame 301. Several limiting plates 303 are distributed and fixed on the upper end of the inner wall of the filter cartridge 32. One side of the annular frame 301 is tightly attached to the surface of the limiting plate 303. The filter bag 302 can easily collect bismuth-containing precipitates and ensure the normal passage of filtered wastewater.

[0021] Among them, a threaded post 304 is fixedly installed on the surface of the limiting plate 303, and an inner sleeve 305 is fixedly installed through the surface of the annular frame 301. The surface of the threaded post 304 and the inside of the inner sleeve 305 are slidably connected. Through the threaded post 304 and the inner sleeve 305, the annular frame 301 and the limiting plate 303 can be quickly positioned and connected.

[0022] The threaded post 304 has a threaded cap 306 threadedly installed at its end. One end of the threaded cap 306 is tightly attached to the end face of the inner sleeve 305. The threaded post 304 and the threaded cap 306 are threadedly installed to each other, which can lock and fix the annular frame 301 and the limiting plate 303.

[0023] In practice In this scheme, wastewater tank 1 serves as the initial container, storing bismuth-containing acidic wastewater to be treated. During treatment, a circulation pipe 14 located at the lower end of one side of wastewater tank 1, driven by a circulation pump 15, continuously pumps wastewater from the bottom of the tank. The circulation pump 15 is fixed by a bracket, with its inlet connected to a flange on the circulation pipe 14, and its outlet returning the pumped wastewater to the upper port of wastewater tank 1 via a return pipe 16. This circulation process is crucial, forcing the wastewater to continuously mix and agitate within wastewater tank 1, significantly improving the mixing and agitation of the wastewater with subsequently added chemicals. The contact efficiency and mixing uniformity between the agents create favorable conditions for subsequent chemical reactions. In addition, in the wastewater circulation path, the support frame 12 fixedly installed on the inner wall of the wastewater tank 1 and the sedimentation net 13 covering it play a preliminary physical filtration role. When the wastewater circulates in the tank, larger suspended solid impurities will be intercepted by the sedimentation net 13, ensuring that the liquid drawn through the circulation pipe 14 and returned through the return pipe 16 is relatively clean, avoiding blockage of the pump and pipeline. The sedimentation net 13 is made of metal material and assembled with screws, which is convenient for regular disassembly, cleaning or replacement. While the wastewater is circulating and mixing, the pH measuring probe 19, which is fixedly installed at the lower end of the side wall of the wastewater tank 1, will monitor the acidity and alkalinity of the wastewater in the tank in real time. When the pH measuring probe 19 detects that the wastewater is too acidic or does not meet the optimal pH conditions required for the subsequent precipitation reaction, the control system will instruct the solenoid valve 18 connected to the acid-base adjustment liquid interface 17 to open. The acid-base adjustment liquid interface 17 is fixed through the wastewater tank 1 on the side away from the circulation pipe 14 and is connected to the storage container of acid or alkaline adjustment liquid through an external pipe. The adjustment liquid is accurately added to the wastewater tank 1 through the acid-base adjustment liquid interface 17 and fully mixed with the circulating wastewater. After the wastewater undergoes circulation and acid-base adjustment, bismuth ions are converted into insoluble precipitates. At this point, the solenoid valve 31 on the lower end of the conveying port 3 on one side of the wastewater tank 1 opens. The treated liquid-solid mixture enters the filter cartridge 32 connected to its flange through the conveying port 3 under pressure or gravity. The filter cartridge 32 is the core component for achieving precision filtration. Inside it, an annular frame 301 is slidably fitted. A filter bag 302 for capturing bismuth-containing precipitates is embedded and fixed inside the annular frame 301. When the liquid passes through the filter bag 302, the bismuth-containing precipitates are effectively trapped and collected inside the filter bag 302. The limiting plate 303 distributed on the upper end of the inner wall of the filter cartridge 32 is used to limit the annular frame 301. 1. Initial positioning is performed, while the threaded post 304 fixed on the surface of the limiting plate 303 passes through the inner sleeve 305 on the surface of the annular frame 301. Finally, the annular frame 301 and its filter bag 302 are firmly locked in place by tightening the threaded cap 306, ensuring the sealing of the filtration process. The filtered clear liquid is discharged through the transition interface 33 at the other end of the filter cartridge 32, entering the next stage of treatment unit or being discharged. After long-term operation of the device, the threaded cap 306 can be easily loosened to remove the annular frame 301 and the filter bag 302 full of sediment for cleaning or replacement. At the same time, the waste discharge interface 2 at the bottom of the wastewater tank 1 and its solenoid valve 21 can be used to discharge the flushing sludge accumulated at the bottom of the tank. The above description is only a preferred embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and utility model concept of this utility model, should be included within the protection scope of this utility model.

Claims

1. An apparatus for treating bismuth-containing acidic wastewater, comprising a wastewater tank (1), characterized in that: The bottom of the wastewater tank (1) is symmetrically fixed with a base platform (11), and a support frame (12) is fixedly installed on the inner wall of the wastewater tank (1). The upper end of the support frame (12) is covered with a sedimentation net (13). A circulation pipe (14) is fixed through the lower end of one side of the wastewater tank (1). A circulation pump (15) is fixedly installed on the outer wall of the circulation pipe (14) of the wastewater tank (1) by a bracket. The inlet end of the circulation pump (15) is connected to the end flange of the circulation pipe (14). The outlet flange of the circulation pump (15) is connected to a return pipe (16). The return pipe (16) is located above the port of the wastewater tank (1). A pH adjustment liquid interface (17) is fixedly installed on the side of the wastewater tank (1) away from the circulation pipe (14). A solenoid valve (18) is installed on the pH adjustment liquid interface (17). The valve core of the solenoid valve (18) is embedded inside the pH adjustment liquid interface (17). A pH measuring probe (19) is fixedly installed on the lower side wall of the wastewater tank (1).

2. The apparatus for treating bismuth-containing acidic wastewater according to claim 1, characterized in that: The wastewater tank (1) has a waste discharge port (2) fixed through the lower end. A solenoid valve (21) is installed near the wastewater tank (1) at the waste discharge port (2). The valve core of the solenoid valve (21) is embedded inside the waste discharge port (2).

3. The apparatus for treating bismuth-containing acidic wastewater according to claim 2, characterized in that: A conveying interface (3) is fixed through the lower end of one side of the wastewater pool (1). A solenoid valve (31) is installed on the conveying interface (3), and the valve core of the solenoid valve (31) is embedded inside the conveying interface (3).

4. The apparatus for treating bismuth-containing acidic wastewater according to claim 3, characterized in that: The flange of the conveying interface (3) away from the wastewater tank (1) is connected to a filter cartridge (32), and the flange of the other end of the filter cartridge (32) is connected to a transition interface (33) for connection with the next stage conveying pump.

5. The apparatus for treating bismuth-containing acidic wastewater according to claim 4, characterized in that: The filter cartridge (32) is slidably fitted with an annular frame (301), and a filter bag (302) is embedded and fixed inside the annular frame (301). Several limiting plates (303) are distributed and fixed on the upper end of the inner wall of the filter cartridge (32). One side of the annular frame (301) is closely attached to the surface of the limiting plate (303).

6. The apparatus for treating bismuth-containing acidic wastewater according to claim 5, characterized in that: The surface of the limiting plate (303) is fixedly mounted with a threaded column (304), and the surface of the annular frame (301) is fixedly mounted with an inner sleeve (305). The surface of the threaded column (304) and the interior of the inner sleeve (305) are slidably connected.

7. The apparatus for treating bismuth-containing acidic wastewater according to claim 6, characterized in that: The threaded post (304) is threaded with a threaded cap (306) at one end, and one end of the threaded cap (306) is tightly fitted to the end face of the inner sleeve (305).

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