Treatment equipment for efficiently removing heavy metals in acid wastewater

Abstract

The utility model discloses treatment equipment for efficiently removing heavy metal in acid wastewater, and relates to the technical field of removal of heavy metal in acid wastewater and recovery of waste acid. The treatment equipment comprises a treatment equipment body, wherein the treatment equipment body comprises a filtering assembly, a multi-stage adsorption assembly, a small real-time monitoring assembly, an electrodialysis assembly and a regenerated liquid storage tank. According to the utility model, the adsorption times in the process of removing the heavy metals in the acid wastewater are adjusted in time through the multi-stage adsorption assembly and the small real-time monitoring assembly, and the recycling of the regenerated liquid is realized through the electrodialysis assembly, so that the problems of large mud yield and high treatment cost when the heavy metals in the acid wastewater are treated in the prior art are solved; meanwhile, the acid wastewater can be recycled and reutilized.

Description

Technical Field

[0001] This utility model relates to the field of heavy metal removal and acid recovery technology in acidic wastewater, and in particular to a treatment device for efficiently removing heavy metals from acidic wastewater. Background Technology

[0002] Acidic heavy metal wastewater generally refers to sewage with a low pH and containing a large amount of heavy metals. If discharged into rivers and lakes without treatment, it will lead to water acidification and reduce the self-purification function of the water body. The composition of heavy metal wastewater is relatively complex. Currently, the main methods for treating acidic wastewater include neutralization, sulfide precipitation, ion exchange, adsorption, membrane separation, constructed wetlands, and microbial methods.

[0003] A search revealed that authorization announcement number CN217756991U, published on November 8, 2022, discloses a sulfidation system for removing heavy metals from acidic wastewater. This system belongs to the field of heavy metal removal from acidic wastewater and includes a connected hydrogen sulfide preparation device and a sulfidation reactor. Hydrogen sulfide gas generated by the hydrogen sulfide preparation device enters the sulfidation reactor along with the acidic wastewater to be treated through a first inlet. The sulfidation reactor is equipped with a circulation port and a second inlet, which are connected to drive internal liquid circulation within the reactor. The purpose is to circulate the liquid within the sulfidation reactor and spray it out in a mist. During the spraying process, the liquid can react again with the overflowing hydrogen sulfide gas within the reactor, thereby improving the utilization rate of the hydrogen sulfide gas. Simultaneously, it can also absorb the overflowing hydrogen sulfide gas through reaction, preventing its leakage. While this method solves the problem of generating odorous hydrogen sulfide gas, the source of the precipitant is limited, and its cost is high.

[0004] Existing treatment technologies for removing heavy metals from acidic wastewater generally suffer from limited efficiency in treating heavy metal ions, large sludge production, high reagent consumption, and high treatment costs. To address these issues, we provide a highly efficient treatment device for removing heavy metals from acidic wastewater. Utility Model Content

[0005] The purpose of this invention is to provide a highly efficient treatment device for removing heavy metals from acidic wastewater. The device uses a filter assembly to remove suspended impurities from the wastewater and an adsorption assembly to remove heavy metal impurities from the waste acid. This solves the problems of secondary pollution, difficulty in recycling waste acid, and high manufacturing costs of existing heavy metal waste acid treatment equipment.

[0006] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0007] This utility model provides a treatment device for efficiently removing heavy metals from acidic wastewater, including a treatment device body, and a filter assembly is provided on the front side of the treatment device body;

[0008] The processing equipment body is provided with a multi-stage adsorption assembly in the middle. The adsorption assembly includes multiple sets of adsorption columns connected in series. An integrated pump set is fixed on the upper wall of the adsorption column. A connecting pipe is fixed on one side of the integrated pump set corresponding to the water inlet on the upper wall of the adsorption column.

[0009] A small real-time monitoring component is installed at the end of the adsorption column outlet of the adsorption component in the middle of the main body of the treatment equipment.

[0010] An electrodialysis assembly is provided on the upper rear side of the main body of the treatment equipment, and a regenerated liquid storage tank assembly is provided on the lower rear side of the main body of the treatment equipment.

[0011] The present invention is further configured such that an inlet is provided on the left side of the upper wall of the filter assembly, and a flow sensor is fixed on the inlet connecting pipe.

[0012] The present invention is further configured such that a filter membrane block is fixedly assembled inside the filter assembly.

[0013] The present invention is further configured such that an outlet is fixed on the right side of the lower wall of the filter assembly and connected to the multi-stage adsorption assembly, and a drain valve is fixed at the bottom of the right side of the filter assembly.

[0014] The present invention is further configured such that a water distributor is fixed on the upper wall of the multi-stage adsorption component, and an integrated pump unit is fixed at the water inlet of the water distributor.

[0015] The present invention is further configured such that a regenerated liquid outlet is provided on the upper right side of the multi-stage adsorption component, the regenerated liquid outlet of the multi-stage adsorption component is connected to the inlet of the electrodialysis component, and a peristaltic pump unit is provided on the connecting pipe.

[0016] The present invention is further configured such that the multi-stage adsorption component is filled with a specific adsorption resin, an outlet is provided on the lower right side of the multi-stage adsorption component, a regenerated liquid inlet is provided at the bottom of the multi-stage adsorption component, the regenerated liquid inlet of the multi-stage adsorption component is connected to the outlet of the regenerated liquid storage tank, and a peristaltic pump unit is provided on the connecting pipe.

[0017] The present invention is further configured such that the multiple adsorption columns of the multi-stage adsorption assembly are connected in series. Both the inlet and outlet of each adsorption column are fixed with connecting pipes.

[0018] The present invention is further configured such that the outlet of the multiple adsorption columns of the multi-stage adsorption component is equipped with a small real-time monitoring component, and an electric three-way valve is fixed on the outlet connecting pipe.

[0019] This utility model has the following beneficial effects:

[0020] 1. This utility model sets up a multi-stage adsorption component and utilizes the specific adsorption properties of the filled resin to adsorb heavy metals in acidic wastewater. The multi-stage adsorption efficiently adsorbs heavy metals, solving the problem of large sludge production in the existing technology for removing heavy metals from acidic wastewater, while realizing the recycling and reuse of acidic wastewater.

[0021] 2. This utility model, by setting up a small real-time monitoring component, enables timely adjustment of the adsorption count, maximizes the utilization of equipment resources, and solves the problem of high cost of acidic wastewater treatment in existing technologies.

[0022] 3. This utility model, by setting up an electrodialysis component and a regenerated liquid storage tank, processes the used regenerated liquid through the electrodialysis component. The processed liquid then passes through a connecting pipe into the interior of the regenerated liquid storage tank, realizing the recycling of the regenerated liquid, reducing the regeneration cost of the adsorption column, and solving the problem of high processing costs in the prior art.

[0023] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0024] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0025] Figure 1 This is a front view of the overall structure of a treatment device for efficiently removing heavy metals from acidic wastewater.

[0026] Figure 2 This is a top view of the main body of the processing equipment.

[0027] Figure 3 This is a right-side structural view of the processing equipment body.

[0028] Figure 4 This is a vertical sectional view of the main body of the processing equipment.

[0029] The attached diagram lists the components represented by each number as follows:

[0030] 1-Treatment equipment body, 2-Filter assembly, 21-Filter assembly inlet, 22-Combined filter membrane block, 23-Filter assembly outlet, 3-Multi-stage adsorption assembly, 31-Integrated pump set, 32-Adsorption assembly inlet, 33-Adsorption column, 34-Regenerated liquid outlet, 35-Regenerated liquid outlet peristaltic pump unit, 36-Water distributor, 37-Specific adsorption resin, 38-Regenerated liquid inlet, 39-Adsorption assembly outlet, 4-Small real-time monitoring assembly, 5-Electrodialysis assembly, 51-Electrodialysis inlet, 52-Electrodialysis membrane block, 53-Electrodialysis outlet, 6-Regenerated liquid storage tank, 61-Regenerated liquid inlet, 62-Regenerated liquid outlet, 63-Regenerated liquid inlet peristaltic pump unit. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Specific Implementation Example 1

[0033] Please see Figure 1-4 This utility model discloses a high-efficiency treatment device for removing heavy metals from acidic wastewater. It includes a treatment device body 1, with a filter assembly 2 at the front for filtering suspended impurities in the raw water. The filter assembly contains a combined filter membrane block 22 to trap solid impurities in the raw water. An outlet 23 is located on the lower right side of the filter assembly for conveying the filtered raw water. A multi-stage adsorption assembly 3 is located in the middle of the treatment device body 1 for adsorbing heavy metal impurities in the raw water. The multi-stage adsorption assembly contains multiple adsorption columns 33 connected in series. An inlet 32 ​​is located directly above each adsorption column 33, connecting to a water distributor 36 to ensure that wastewater enters the adsorption treatment system uniformly and stably. Specific adsorption resin 37 is fixed inside each adsorption column 33. An outlet 39 is located on the lower right side of each adsorption column 33 for discharging treated, compliant water for reuse. A small real-time monitoring component is located at the outlet 39 to adjust the adsorption frequency in real time.

[0034] An electrodialysis assembly 5 is installed on the upper rear side of the treatment equipment body 1 for disposing of waste liquid generated during the regeneration process of the resin in the adsorption column. A regeneration liquid inlet 51 is installed on the upper right side of the electrodialysis assembly 5, which is connected to the regeneration liquid outlet 34 of the multi-stage adsorption assembly through a connecting pipe. An electrodialysis membrane block 52 is installed inside the electrodialysis assembly 5 for treating the regeneration waste liquid after use. A regeneration liquid storage tank assembly 6 is installed on the lower rear side of the treatment equipment body 1 for storing the regeneration liquid. An inlet 61 is installed on the upper right side of the regeneration liquid storage tank assembly 6 and is connected to the outlet 53 of the electrodialysis assembly for recycling the regeneration liquid. An outlet 62 is installed directly below the regeneration liquid storage tank assembly 6 and is connected to the regeneration liquid inlet 38 of the multi-stage adsorption assembly for regenerating the resin in the adsorption column.

[0035] Specifically, an inlet 32 ​​is provided on the top of the multi-stage adsorption component and connected to the outlet of the filter component via a connecting pipe. An integrated pump set 31 is fixed on the connecting pipe. An external delivery pump delivers the raw water to be filtered. The raw water passes through the combined filter membrane block 22 and enters the multi-stage adsorption component 3. During this process, a flow sensor detects the amount of water entering the filter component 2. When the amount of water entering the filter component 2 reaches the set value, the controller controls the external delivery pump to stop working.

[0036] Raw water entering the adsorption column 33 inside the multi-stage adsorption component 3 undergoes adsorption treatment through the specific adsorption resin 37 and reaches the adsorption column outlet 39. After being detected by the small real-time monitoring component 4, it enters the next round of adsorption treatment or is directly recycled and disposed of if it meets the standards.

[0037] After one round of adsorption by the specific adsorption resin 37 inside the adsorption column 33, the regenerated liquid inside the regenerated liquid storage tank assembly 6 enters the adsorption column through the regenerated liquid inlet 38 at the lower end of the adsorption column via the peristaltic pump unit 63 to regenerate and backwash the resin. The used regeneration waste liquid then enters the electrodialysis assembly 5 through the regenerated liquid outlet 34 at the upper right end of the adsorption column 33 via the peristaltic pump unit 35.

[0038] The regenerated waste liquid entering the electrodialysis module 5 is recycled through the electrodialysis membrane block 52. The treated regenerated liquid is then stored in the regenerated liquid storage tank module 6 for later use.

[0039] The operation process of this embodiment is as follows: an external delivery pump delivers the raw water to be filtered to the filter assembly 2. During this process, a flow sensor detects the inflow rate. When the inflow rate reaches a preset value, the controller controls an alarm to remind the staff. At this time, the delivery of raw water to the filter assembly 2 is stopped. During the adsorption process, the integrated pump set 31 works to allow the raw water inside the filter assembly 2 to pass through the water distributor 36 and the specific adsorption resin 37 for adsorption. The qualified water detected by the small real-time monitoring component 4 is discharged and recycled.

Claims

1. A treatment device for efficiently removing heavy metals in acidic wastewater, comprising a treatment device body (1), characterized in that: The front side of the processing equipment body (1) is provided with a filter assembly (2); the middle part of the processing equipment body (1) is provided with a multi-stage adsorption assembly (3), the multi-stage adsorption assembly (3) comprises an adsorption column (33), the upper wall of the adsorption column (33) is fixed with an integrated pump group (31), the inside of the adsorption column (33) is fixed with a water distributor (36) and specific adsorption resin (37), the adsorption assembly water outlet (39) of the adsorption column (33) is provided with a small real-time monitoring assembly (4), the rear side of the processing equipment body (1) is provided with an electrodialysis assembly (5) and a regeneration liquid storage tank (6).

2. The treatment device for efficiently removing heavy metals in acidic wastewater according to claim 1, characterized in that: The inside of the filter assembly (2) is fixed with a combined filter membrane block (22).

3. The treatment device for efficiently removing heavy metals in acidic wastewater according to claim 1, characterized in that: The inside of the multi-stage adsorption assembly (3) is connected in series with the adsorption column (33), and the adsorption column (33) is fixed with specific adsorption resin (37).

4. The treatment device for efficiently removing heavy metals in acidic wastewater according to claim 1, characterized in that: The adsorption assembly water outlet (39) of the adsorption column (33) is provided with a small real-time monitoring assembly (4), and a motor-operated three-way valve is arranged on the water outlet connecting pipe.

5. The treatment device for efficiently removing heavy metals in acidic wastewater according to claim 1, characterized in that: The right side of the electrodialysis assembly (5) is connected with the backwashing water outlet (34) of the multi-stage adsorption assembly (3).

6. The treatment device for efficiently removing heavy metals in acidic wastewater according to claim 1, characterized in that: The right side of the electrodialysis assembly (5) is connected with the backwashing water outlet (34) of the multi-stage adsorption assembly (3).

7. The treatment device for efficiently removing heavy metals in acidic wastewater according to claim 1, characterized in that: The lower part of the right side of the electrodialysis assembly (5) is connected with the regeneration liquid inlet (61) of the regeneration liquid storage tank (6).

8. The treatment device for efficiently removing heavy metals in acidic wastewater according to claim 6, characterized in that: The lower part of the right side of the electrodialysis assembly (5) is connected with the regeneration liquid inlet (61) of the regeneration liquid storage tank (6) through a connecting pipe, a peristaltic pump is arranged on the connecting pipe, and the regeneration liquid is recycled. The lower part of the right side of the electrodialysis assembly (5) is connected with the regeneration liquid inlet (61) of the regeneration liquid storage tank (6) through a connecting pipe, a peristaltic pump is arranged on the connecting pipe, and the regeneration liquid is recycled.

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