Arsenic-containing waste residue treatment device

Abstract

The utility model relates to the technical field of arsenic-containing waste residue treatment, and discloses an arsenic-containing waste residue treatment device which comprises a waste residue reactor and a wastewater reactor, the waste residue reactor is connected with a first circulating heating device, the wastewater reactor is connected with a second circulating heating device, and the waste residue reactor comprises a waste residue dissolving chamber and a first heating layer. The wastewater reactor comprises a wastewater treatment chamber and a second heating layer, the waste residue dissolving chamber is connected and communicated with the wastewater treatment chamber through a flow guide pipe, and waste residues are preliminarily dissolved into wastewater in the waste residue reactor and discharged into the wastewater reactor through the flow guide pipe; the wastewater reactor further treats the wastewater discharge and forms a more stable solids into the solids collector. According to the arsenic-containing waste residue harmless treatment device, arsenic-containing waste residues can be subjected to harmless treatment, meanwhile, solids are filtered and collected so as to be recycled, and the whole reactor system improves the convenience of process implementation, improves the efficiency, saves time and reduces the labor cost.

Description

Technical Field

[0001] This utility model relates to the field of arsenic-containing waste residue treatment technology, and more specifically to an arsenic-containing waste residue treatment device. Background Technology

[0002] Arsenic (As) is a toxic metallic element. In the natural environment, arsenic usually occurs as arsenides or sulfides in non-ferrous metal deposits (such as copper, lead, zinc, and cadmium) and precious metal deposits (such as silver, gold, and platinum). Non-ferrous metal mining and beneficiation activities expose arsenic-containing tailings to the surface. Under biological or abiotic processes, these arsenic compounds oxidize and dissolve, releasing large amounts of arsenic into acidic mine wastewater. In heavily polluted mining environments, arsenic concentrations in water bodies can reach thousands or even tens of thousands of milligrams per liter (mg / L). −1 Arsenic-containing waste has posed a serious threat to the health of surrounding residents and the ecological environment. Therefore, it is urgent to treat arsenic-containing waste and transform it into a more stable form of waste. However, existing equipment for treating arsenic-containing waste is mostly manual, which is time-consuming and consumes a significant amount of human resources. Utility Model Content

[0003] In view of this, the present invention provides an arsenic-containing waste residue treatment device, which can solve the problem that the current two reactors for treating arsenic-containing waste residue require manual processing separately, reduce the intensity of workers' work, save time, process arsenic-containing waste residue into more stable waste residue, and reduce the degree of arsenic pollution hazards.

[0004] To achieve the above objectives, the present invention provides an arsenic-containing waste residue treatment device, comprising a waste residue reactor and a wastewater reactor. The waste residue reactor is connected to a first circulating heating device, and the wastewater reactor is connected to a second circulating heating device. Both the first and second circulating heating devices are provided with a heating device inlet and a heating device outlet.

[0005] The waste residue reactor includes a waste residue dissolution chamber and a first heating layer. The first heating layer is located outside the waste residue dissolution chamber, and a first heating channel is formed between the first heating layer and the waste residue dissolution chamber. The wastewater reactor includes a wastewater treatment chamber and a second heating layer. The second heating layer is located outside the wastewater treatment chamber, and a second heating channel is formed between the second heating layer and the wastewater treatment chamber.

[0006] Both the waste residue dissolving chamber and the wastewater treatment chamber are equipped with stirring paddles. The bottom of the stirring paddles is equipped with scraper blades. Both the waste residue dissolving chamber and the wastewater treatment chamber are equipped with feeding ports at the top. Below the feeding ports are two meshing grinding gears. Below the grinding gears are baffles. Both the waste residue dissolving chamber and the wastewater treatment chamber are equipped with solid collection pipes at the bottom. The solid collection pipes are equipped with solid discharge filters inside.

[0007] The waste residue dissolution chamber and the wastewater treatment chamber are connected and communicated through a guide pipe. A sewage inlet pipe is provided on the side of the waste residue dissolution chamber away from the wastewater treatment chamber, and a wastewater outlet pipe is provided on the side of the wastewater treatment chamber away from the waste residue dissolution chamber. Water pumps are provided on the guide pipe, the sewage inlet pipe, and the wastewater outlet pipe.

[0008] Preferably, the two opposite sides of the first heating channel are connected to and communicate with the first heating device through a circulating water inlet pipe and a circulating water outlet pipe, respectively.

[0009] Preferably, the two opposite sides of the second heating channel are connected to and communicate with the second heating device through a circulating water inlet pipe and a circulating water outlet pipe, respectively.

[0010] Preferably, both the circulating water inlet pipe and the circulating water outlet pipe are equipped with water pumps, and both the first circulating heating device and the second circulating heating device are equipped with heating rods.

[0011] Preferably, the top of both the waste residue reactor and the wastewater reactor is equipped with a pH temperature timer port, a stirring paddle port, a level gauge port, and a motor cable port, and the rotating shaft of the stirring paddle is installed at the stirring paddle port.

[0012] Preferably, a pH thermometer is installed at the pH thermometer port, and the bottom end of the pH thermometer extends into the interior of the waste residue dissolution chamber and the wastewater treatment chamber, respectively.

[0013] Preferably, a level gauge is installed at the level gauge port, and the bottom end of the level gauge extends into the interior of the waste residue dissolution chamber and the wastewater treatment chamber, respectively.

[0014] Preferably, the grinding gear is mounted on a stepper motor, and the wires of the stepper motor are laid inside the motor wire port.

[0015] Preferably, the lower end of the solid collection pipe is provided with a solid collector, and the solid collector is connected to a solid discharge pipe.

[0016] Preferably, the wastewater treatment chamber is equipped with a waste residue filter screen, which is located behind the outlet of the upper guide pipe of the wastewater treatment chamber, and a slag outlet is provided on the bottom surface of the wastewater treatment chamber, which is located in front of the waste residue filter screen.

[0017] As can be seen from the above technical solution, compared with the prior art, the arsenic-containing waste residue treatment device provided by this utility model combines the waste residue reactor and the wastewater reactor into an integrated device. Combining the agitator and the scraper greatly improves the space utilization and energy utilization. A container (solid collector) for holding solids is set at the bottom, which can realize the reactor's own discharge of solids for collection and reuse. The addition of a pH temperature timer makes the start and end of the reaction intuitive and controllable. When the reaction is completely completed, the solution in the waste residue reactor can be automatically flowed into the wastewater reactor. The waste residue filter screen added to the wastewater reactor is more conducive to the discharge of impurities, making the whole process smoother and more rational. In addition, a detachable metering pump can be added at the feeding port to add acidic reagents, realizing multiple uses in one port and saving the volume of each reactor. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the overall structure of the arsenic-containing waste residue treatment device of this utility model;

[0020] Figure 2 This is a schematic diagram of the waste residue reactor and the first circulating heating device of this utility model;

[0021] Figure 3 This is a schematic diagram of the wastewater reactor and the second circulating heating device of this utility model.

[0022] Explanation of reference numerals in the attached diagram: 1. Waste residue reactor; 2. Wastewater reactor; 3. Feed inlet; 4. pH thermometer inlet; 5. Agitator inlet; 6. Level gauge inlet; 7. Motor inlet; 8. Circulating water inlet pipe; 9. Sewage inlet pipe; 10. Circulating water outlet pipe; 11. Guide pipe; 12. Water pump; 13. Wastewater outlet pipe; 14. Solids collector; 15. Solids collection pipe; 16. Solids discharge pipe; 17. Viewing window; 18. Heating device inlet. ; 19. Heating device outlet; 21. Slag outlet; 23. Waste residue dissolving chamber; 24. Wastewater treatment chamber; 25. pH thermometer; 26. Liquid level gauge; 27. Waste residue filter screen; 28. Baffle; 29. ​​Grinding gear; 30. Sludge scraper; 31. Solid discharge filter screen; 32. Heating rod; 33. Stirring paddle; 201. First circulating heating device; 202. Second circulating heating device; 221. First heating layer; 222. Second heating layer. Detailed Implementation

[0023] 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. The following description of an exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. 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.

[0024] Please see the appendix Figure 1-3 The arsenic-containing waste residue treatment device disclosed in this utility model realizes integrated reaction, and the waste residue generated by the reaction is also collected and reused. The wastewater from the reaction can be further treated to meet the discharge standards before being discharged.

[0025] like Figure 1 As shown, the arsenic-containing waste residue treatment device provided by this utility model includes a waste residue reactor 1, a wastewater reactor 2, and two circulating heating devices (first circulating heating device 201 and second circulating heating device 202).

[0026] The waste residue reactor 1 is connected to the first circulating heating device 201, and the wastewater reactor 2 is connected to the second circulating heating device 202. The first circulating heating device 201 and the second circulating heating device 202 are each provided with a heating device inlet 18 and a heating device outlet 19. The first circulating heating device 201 and the second circulating heating device 202 are each provided with a heating rod 32 inside.

[0027] like Figure 2-3 As shown, both the waste residue reactor 1 and the wastewater reactor 2 include a heating layer, a stirring paddle 33, a sludge scraper 30, a water level detector 26, a pH temperature timer 25, a grinding gear 29, and a baffle 28. Both the waste residue reactor 1 and the wastewater reactor 2 are provided with observation ports 17 on their exterior.

[0028] The waste residue reactor 1 includes a waste residue dissolution chamber 23 and a first heating layer 221. The first heating layer 221 is located outside the waste residue dissolution chamber 23, and a first heating channel is formed between the first heating layer 221 and the waste residue dissolution chamber 23. The wastewater reactor 2 includes a wastewater treatment chamber 24 and a second heating layer 222. The second heating layer 222 is located outside the wastewater treatment chamber 24, and a second heating channel is formed between the second heating layer 222 and the wastewater treatment chamber 24.

[0029] It should be noted that the two opposite sides of the first heating channel are connected to the first heating device 201 via the circulating water inlet pipe 8 and the circulating water outlet pipe 10, respectively. The two opposite sides of the second heating channel are connected to the second heating device 202 via the circulating water inlet pipe 8 and the circulating water outlet pipe 10, respectively. A water pump 12 is provided on both the circulating water inlet pipe 8 and the circulating water outlet pipe 10.

[0030] Both the waste residue dissolution chamber 23 and the wastewater treatment chamber 24 are equipped with a stirring paddle 33 and a liquid level monitoring device. The bottom end of the stirring paddle 33 is equipped with a sludge scraper 30. The top of both the waste residue dissolution chamber 23 and the wastewater treatment chamber 24 is equipped with a feeding port 3. Below the feeding port 3 are two meshing grinding gears 29. Waste residue fences are added to the two grinding gears 29. A baffle 28 is provided below the grinding gears 29. The grinding gears 29 are mounted on a stepper motor. The wires of the stepper motor are laid in the motor wire port 7.

[0031] The bottom of both the waste residue dissolution chamber 23 and the wastewater treatment chamber 24 are provided with solid collection pipes 15, and the interior of the solid collection pipes 15 is provided with solid discharge filter screens 31; the lower end of the solid collection pipes 15 is provided with a solid collector 14, and the solid collector 14 is connected to a solid discharge pipe 16.

[0032] The wastewater treatment chamber 24 is equipped with a waste residue filter screen 27, which is located behind the outlet of the guide pipe 11 on the wastewater treatment chamber 24. The bottom surface of the wastewater treatment chamber 24 is equipped with a slag outlet 21, which is located in front of the waste residue filter screen 27.

[0033] The waste residue dissolving chamber 23 and the wastewater treatment chamber 24 are connected and communicate with each other via a guide pipe 11. A sewage inlet pipe 9 is provided on the side of the waste residue dissolving chamber 23 away from the wastewater treatment chamber 24, and a wastewater outlet pipe 13 is provided on the side of the wastewater treatment chamber 24 away from the waste residue dissolving chamber 23. A water pump 12 is provided on each of the guide pipe 11, the sewage inlet pipe 9, and the wastewater outlet pipe 13. Preferably, two sewage inlet pipes 9, two guide pipes 11, and two wastewater outlet pipes 13 are provided to improve the efficiency of wastewater inflow and outflow.

[0034] like Figure 1 As shown, the top of both the waste residue reactor 1 and the wastewater reactor 2 is equipped with a pH temperature timer port 4, a stirring paddle port 5, a liquid level gauge port 6, and a motor cable port 7. The rotating shaft of the stirring paddle 33 is installed at the stirring paddle port 5.

[0035] like Figure 2-3As shown, a pH thermometer 25 is installed at the pH thermometer port 4, and the bottom end of the pH thermometer 25 extends into the interior of the waste residue dissolution chamber 23 and the wastewater treatment chamber 24, respectively. A level gauge 26 is installed at the level gauge port 6, and the bottom end of the level gauge 26 extends into the interior of the waste residue dissolution chamber 23 and the wastewater treatment chamber 24, respectively.

[0036] It should be noted that the pH temperature timer 25 includes a pH meter, a thermometer, and a timer, all of which are electrically connected to the PLC controller. When the waste residue dissolution chamber 23 and the wastewater treatment chamber 24 reach the predetermined pH and temperature, the timer starts timing. When a certain time is reached, it indicates that the reaction is complete. At this time, the guide pipe 11 is opened to discharge the wastewater from the waste residue dissolution chamber 23 into the wastewater treatment chamber 24 or to discharge the wastewater from the wastewater treatment chamber 24.

[0037] The working principle of this arsenic-containing waste residue treatment device is as follows:

[0038] First, the arsenic-containing waste residue is fed into the waste residue reactor 1 through the feed port 3. After being further ground by the grinding gear 29, the larger particles fall onto the partition plate 28 and are intercepted. The even smaller particles fall into the waste residue dissolution chamber 23. The solution is introduced into the waste residue reactor 1 through the sewage inlet pipe 9 to start the reaction. The stirring paddle 33, liquid level monitoring device, pH temperature timer 25 and the first circulating heating device 201 on the left are turned on. The circulating water enters the first heating layer 221 (first heating channel) of the waste residue reactor 1 through the circulating water inlet pipe 8 and the water pump 12. After circulating once, it flows back to the first heating circulation device 201 on the left through the circulating water outlet pipe 10, and the cycle repeats.

[0039] After the reaction begins, the liquid level monitor monitors the liquid level in real time. The metering pump is used to add sulfuric acid through the feed port 3 to adjust the pH to a suitable level. The metering pump is then removed. The pH temperature timer 25 starts timing when a certain temperature and pH are reached. When the set time is reached, the valve on the guide pipe 11 is opened and the water pump 12 flows the solution into the wastewater reactor 2. The solids produced by the reaction that are attached to and precipitated at the bottom of the waste residue dissolution chamber 23 are scraped up by the sludge scraper 30 and enter the solids collector 14 through the solids discharge filter 31. The solids are then collected and reused through the solids discharge pipe 16.

[0040] The solution enters the wastewater reactor 2 through the waste residue filter screen 27. The waste residue intercepted by the waste residue filter screen 27 is discharged from the slag outlet 21. Iron ore is fed into the wastewater reactor 2 through the feed inlet 3 on the wastewater reactor 2. After being further ground into finer particles by the grinding gear 29, it falls onto the partition plate 28, where larger particles are intercepted, and even finer particles fall into the wastewater treatment chamber 24. To start the reaction, the stirring paddle 33, the liquid level monitoring device, the pH temperature timer 25, and the second circulating heating device 202 on the right are turned on. Circulating water enters the second heating layer 222 (second heating channel) of the waste residue reactor 2 through the circulating water inlet pipe 8 and the water pump 12. After one cycle, it flows back to the second heating circulation device 202 on the right through the circulating water outlet pipe 10, and the cycle repeats continuously.

[0041] After the reaction is completed, the solids produced by the reaction that are attached to and precipitated at the bottom of the wastewater treatment chamber 24 are scraped up by the sludge scraper 30, enter the solids collection device 14 through the filter screen 31, and then be collected and reused through the solids discharge pipe 16. The solution is discharged from the wastewater reactor 2 through the wastewater discharge pipe 13.

[0042] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A device for treating arsenic-containing waste residue, characterized in that, The reactor includes a waste residue reactor (1) and a wastewater reactor (2). The waste residue reactor (1) is connected to a first circulating heating device (201), and the wastewater reactor (2) is connected to a second circulating heating device (202). The first circulating heating device (201) and the second circulating heating device (202) are each provided with a heating device inlet (18) and a heating device outlet (19). The waste residue reactor (1) includes a waste residue dissolution chamber (23) and a first heating layer (221). The first heating layer (221) is located outside the waste residue dissolution chamber (23), and a first heating channel is formed between the first heating layer (221) and the waste residue dissolution chamber (23). The wastewater reactor (2) includes a wastewater treatment chamber (24) and a second heating layer (222). The second heating layer (222) is located outside the wastewater treatment chamber (24), and a second heating channel is formed between the second heating layer (222) and the wastewater treatment chamber (24). Both the waste residue dissolving chamber (23) and the wastewater treatment chamber (24) are equipped with stirring paddles (33). The bottom end of the stirring paddles (33) is equipped with a scraper (30). The top of both the waste residue dissolving chamber (23) and the wastewater treatment chamber (24) is equipped with a feeding port (3). Below the feeding port (3) are two meshing grinding gears (29). Below the grinding gears (29) is a baffle (28). The bottom end of both the waste residue dissolving chamber (23) and the wastewater treatment chamber (24) is equipped with a solid material collection pipe (15). The inside of the solid material collection pipe (15) is equipped with a solid material discharge filter (31). The waste residue dissolution chamber (23) and the wastewater treatment chamber (24) are connected and communicated through a guide pipe (11). A sewage inlet pipe (9) is provided on the side of the waste residue dissolution chamber (23) away from the wastewater treatment chamber (24), and a wastewater outlet pipe (13) is provided on the side of the wastewater treatment chamber (24) away from the waste residue dissolution chamber (23). A water pump (12) is provided on the guide pipe (11), the sewage inlet pipe (9) and the wastewater outlet pipe (13).

2. The arsenic-containing waste residue treatment device according to claim 1, characterized in that, The two opposite sides of the first heating channel are connected to the first circulating heating device (201) through the circulating water inlet pipe (8) and the circulating water outlet pipe (10), respectively.

3. The arsenic-containing waste residue treatment device according to claim 1, characterized in that, The two opposite sides of the second heating channel are connected to the second circulating heating device (202) through the circulating water inlet pipe (8) and the circulating water outlet pipe (10), respectively.

4. The arsenic-containing waste residue treatment device according to claim 2 or 3, characterized in that, Both the circulating water inlet pipe (8) and the circulating water outlet pipe (10) are equipped with water pumps (12), and both the first circulating heating device (201) and the second circulating heating device (202) are equipped with heating rods (32).

5. The arsenic-containing waste residue treatment device according to claim 1, characterized in that, The top of both the waste residue reactor (1) and the wastewater reactor (2) is equipped with a pH temperature timer port (4), an agitator port (5), a level gauge port (6), and a motor cable port (7). The shaft of the agitator (33) is installed at the agitator port (5).

6. The arsenic-containing waste residue treatment device according to claim 5, characterized in that, A pH thermometer (25) is installed at the pH thermometer port (4), and the bottom of the pH thermometer (25) extends into the interior of the waste residue dissolution chamber (23) and the wastewater treatment chamber (24), respectively.

7. The arsenic-containing waste residue treatment device according to claim 5, characterized in that, A level gauge (26) is installed at the level gauge port (6), and the bottom end of the level gauge (26) extends into the interior of the waste residue dissolution chamber (23) and the wastewater treatment chamber (24), respectively.

8. The arsenic-containing waste residue treatment device according to claim 5, characterized in that, The grinding gear (29) is mounted on the stepper motor, and the wires of the stepper motor are laid in the motor wire port (7).

9. The arsenic-containing waste residue treatment device according to claim 1, characterized in that, The lower end of the solid collection pipe (15) is provided with a solid collector (14), and the solid collector (14) is connected to a solid discharge pipe (16).

10. The arsenic-containing waste residue treatment device according to claim 1, characterized in that, The wastewater treatment chamber (24) is equipped with a waste residue filter screen (27), which is located behind the outlet of the guide pipe (11) on the wastewater treatment chamber (24). The bottom surface of the wastewater treatment chamber (24) is equipped with a slag outlet (21), which is located in front of the waste residue filter screen (27).

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