Small device for treating mercury-containing wastewater

Abstract

The utility model discloses a small device for treating mercury-containing wastewater, which comprises a settling tank, a tank cover fixedly mounted on the outer side of the upper end of the settling tank through screws, a liquid inlet pipe arranged at the upper end of the tank cover in a penetrating manner, and a driving motor mounted in the middle of the upper end of the tank cover, the output end of the driving motor is connected with a stirring rod located in the settling tank, a first filter screen is mounted in the settling tank, and a first fixing bolt is arranged in the side of the upper end of the first filter screen in a penetrating manner. The impurity discharging pipe is installed in the middle of the lower end of the settling box, a filtering box is arranged at the right side end of the settling box, and a second filtering net and a third filtering net are sequentially arranged in the filtering box from left to right. According to the efficient filtration and adsorption combined mercury-containing wastewater treatment device, filtration and adsorption are conveniently combined, the overall treatment efficiency is improved, and meanwhile, mercury-containing ion impurities obtained after adsorption treatment are conveniently discharged; the method is suitable for units generating a small amount of mercury-containing wastewater, and the investment cost is low.

Description

Technical Field

[0001] The utility model relates to the technical field of mercury-containing wastewater treatment, in particular to a small device for treating mercury-containing wastewater. Background Art

[0002] Mercury is a heavy metal that causes serious pollution and is harmful to the environment and human health. Currently, mercury-containing wastewater mainly comes from non-ferrous metal smelters, instrument factories and certain chemical plants. Before being discharged, mercury-containing wastewater needs to be treated through treatment equipment.

[0003] Chinese patent publication number CN219363449U discloses a mercury-containing wastewater treatment device, comprising a reaction and precipitation zone, a filtration zone, and an adsorption zone arranged in sequence; the reaction and precipitation zone comprises a reaction tank, the rear end of which is connected to a sedimentation tank; the filtration zone comprises an ultrafiltration tank connected to the rear end of the sedimentation tank, the ultrafiltration tank being provided with a concentrated water return pipe, the concentrated water return pipe being connected to the water inlet end of the reaction tank; the adsorption zone comprises an activated carbon device connected to the rear end of the ultrafiltration tank; the treatment device is adaptable to mercury-containing wastewater of various concentrations, adopts a sedimentation tank effluent return method to dilute the inlet concentration, and recycles and reuses unreacted sulfide ions, thereby improving the utilization rate of the reagent and saving the consumption cost of the reagent; an ultrafiltration device is added at the front end of the activated carbon device to control suspended matter in the activated carbon inlet, which is beneficial to prevent clogging of the activated carbon, improves the adsorption efficiency and regeneration efficiency, reduces the adsorption load of the subsequent activated carbon device, and reduces the total designed usage of the activated carbon. The above mercury-containing wastewater treatment device is suitable for treating a large amount of mercury-containing wastewater, but is not suitable for treating a unit that produces a small amount of mercury-containing wastewater. There is also a problem of poor economic efficiency in investing in the mercury-containing wastewater treatment device. Utility Model Content

[0004] The utility model provides a small device for treating mercury-containing wastewater to solve the defects mentioned in the background art. The technical solution adopted is:

[0005] A small device for treating mercury-containing wastewater comprises a sedimentation tank, a tank cover fixedly mounted on the upper end of the sedimentation tank by screws, and two liquid inlet pipes penetrating the upper end of the tank cover, and further comprises:

[0006] A drive motor is mounted in the middle of the upper end of the box cover, and the output end of the drive motor is connected to a stirring rod located in the sedimentation box. A first filter is installed inside the sedimentation box, and a first fixing bolt is provided through the upper end side of the first filter. A guide plate is installed on the outer side of the lower end of the first filter at the bottom of the inner side of the sedimentation box.

[0007] A discharge pipe is installed in the middle of the lower end of the sedimentation box, and a connecting pipe is provided through the lower end of the side wall of the sedimentation box. A filter box is provided at the right end of the sedimentation box, and a pump body is installed on the left side of the upper end of the filter box, and the left end of the pump body is connected to the connecting pipe. The interior of the filter box is provided with a second filter screen and a third filter screen from left to right.

[0008] Preferably, a support bracket is fixedly mounted on the outer side of the lower end of the sedimentation box, and the filter box is located on the right side of the upper end surface of the support bracket.

[0009] Preferably, the first filter screen forms a detachable structure with the sedimentation box through a first fixing bolt, and the first filter screen is funnel-shaped.

[0010] Preferably, a sealing structure is provided at the connection between the first filter screen and the guide plate, and the outer side of the guide plate is arranged to be tilted downward.

[0011] Preferably, two plug-in slots are provided on the inner wall of the filter box, and both side edges of the second filter screen and the third filter screen are respectively plugged into the corresponding plug-in slots.

[0012] Preferably, a second fixing bolt is provided through the upper ends of the connections between the second filter screen and the third filter screen and the filter box, and the filter aperture size of the second filter screen is larger than the filter aperture size of the third filter screen.

[0013] Preferably, a drain pipe is provided at the lower right end of the filter box.

[0014] The beneficial effects of the utility model are as follows: the small device for treating mercury-containing wastewater occupies a small area, has a relatively high degree of integration, and has low investment costs. It is suitable for use in units that produce a small amount of mercury-containing wastewater. It can be assembled with most standard parts and a small amount of non-standard parts, and the non-standard parts have a simple structure and are easy to process.

[0015] This small-scale device for treating mercury-containing wastewater combines filtration and adsorption, improving overall treatment efficiency and facilitating the removal of mercury-containing ion impurities after adsorption. A second filter and a third filter are each fixedly mounted within the filter box via second fixing bolts. After being filtered through the first filter, wastewater flows through the second and third filters, respectively, and is discharged from the filter box through a drainpipe. The second and third filters then perform a double filtration of the wastewater, further enhancing the overall treatment effect. A drive motor rotates a stirring rod within the sedimentation tank, which thoroughly mixes and stirs the mercury-containing wastewater and flocculant, allowing them to react fully and flocculate the mercury-containing ion impurities. The drive motor is turned off, and static sedimentation is performed to allow the adsorbed and flocculated mercury-containing ion impurities to settle within the first filter. Subsequently, a solenoid valve on the outer side of the wastewater discharge pipe is opened to discharge the wastewater from the wastewater discharge pipe, facilitating the removal of the mercury-containing ion impurities after adsorption. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the planed structure of the sedimentation box and the box cover;

[0018] Figure 3 for Figure 2 A magnified schematic diagram of the local structure at point A;

[0019] Figure 4 This is a schematic diagram of the assembly structure of the second filter screen, the third filter screen and the filter box.

[0020] In the figure: 1. Sedimentation tank; 2. Tank cover; 3. Liquid inlet pipe; 4. Support bracket; 5. Drive motor; 6. Stirring rod; 7. First filter screen; 8. First fixing bolt; 9. Guide plate; 10. Drain pipe; 11. Connecting pipe; 12. Pump body; 13. Filter tank; 14. Drain pipe; 15. Second filter screen; 16. Third filter screen; 17. Second fixing bolt. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0022] See also Figure 1-4The utility model provides a small device for treating mercury-containing wastewater, comprising a sedimentation box 1 with an annular step inside, a box cover 2 fixed to the upper end of the sedimentation box 1 by screws, and a group of liquid inlet pipes 3 provided through the upper end of the box cover 2, and also comprising a drive motor 5 installed in the middle of the upper end of the box cover 2, the output end of the drive motor 5 is connected to a stirring rod 6 located in the sedimentation box 1, and a first filter screen 7 with a conical shape and an opening at the upper and lower ends is installed inside the sedimentation box 1, that is, the first filter screen 7 is funnel-shaped, and the first filter screen 7 At least two through holes for the first fixing bolts 8 are evenly distributed on the upper edge surface, and screw holes for the first fixing bolts 8 are correspondingly opened on the annular step where the sedimentation box 1 is located. The first filter screen 7 is fastened at the annular step where the sedimentation box 1 is located by the first fixing bolts 8. A guide plate 9 located at the lower end of the first filter screen 7 is installed at the bottom of the sedimentation box 1. The guide plate 9 has a conical inclined surface, and the guide plate 9 axially opens a through hole corresponding to the lower end of the first filter screen 7. The upper end of the guide plate 9 is connected to the lower end of the first filter screen 7. A through hole corresponding to the through hole where the guide plate 9 is located is opened at the bottom of the sedimentation box 1, and a through hole corresponding to the connecting pipe 11 is opened on the lower side of one side of the sedimentation box 1. At least three or more supporting legs 4 are fixedly installed on the outside of the lower end of the sedimentation box 1. The filter box 13 is located next to the through hole corresponding to the connecting pipe 11 where the sedimentation box 1 is located; the impurity discharge pipe 10 is installed in the middle of the lower end of the sedimentation box 1, and is connected to the through hole where the bottom of the sedimentation box 1 is located and the through hole where the guide plate 9 is located; the connecting pipe 11 is connected to the through hole where the lower side of the sedimentation box 1 is located ; The pump body 12 is installed on the left side of the upper end of the filter box 13, and the left end of the pump body 12 is connected to the connecting pipe 11. Two plug-in slots are provided in the filter box 13, and the second filter screen 15 and the third filter screen 16 are plugged into their respective plug-in slots from left to right. Two pairs of second fixing bolts 17 are provided at the upper ends of the connections between the second filter screen 15 and the third filter screen 16 and the filter box 13. The filtering aperture of the second filter screen 15 is larger than the filtering aperture of the third filter screen 16. A drain pipe 14 is provided on the lower right side of the filter box 13.

[0023] When using the small device for treating mercury-containing wastewater, the whole device is stably placed on a designated plane through the support legs 4, and the mercury-containing wastewater is injected into the sedimentation tank 1 through one of the liquid inlet pipes 3, and the flocculant is injected into the sedimentation tank 1 through the other liquid inlet pipe 3. Then the drive motor 5 is started, so that the drive motor 5 drives the stirring rod 6 to rotate in the sedimentation tank 1. At this time, the stirring rod 6 can fully mix and stir the mercury-containing wastewater and the adsorbent, so that the mercury wastewater and the flocculant can fully react, so that the flocculant can adsorb and flocculate the mercury ion impurities. Then the drive motor is turned off. 5. Static sedimentation is performed to allow the adsorbed and flocculated mercury-containing ion impurities to settle within the first filter screen 7. Subsequently, the solenoid valve on the impurity discharge pipe 10 is opened to discharge the impurities from the impurity discharge pipe 10. The filtered wastewater can then flow through the conical surface (i.e., the inclined surface) of the guide plate 9 to accumulate below the sedimentation tank 1. It is then pumped through the connecting pipe 11 and the pump body 12 into the left side of the filter box 13. The filtered wastewater then flows sequentially through the second filter screen 15 and the third filter screen 16, and is discharged from the filter box 13 through the drain pipe 14. The second and third filter screens 15, 16 provide dual filtration for the wastewater. This mercury-containing wastewater treatment device combines filtration and adsorption, improving the efficiency of mercury-containing wastewater treatment.

[0024] Mercury-containing wastewater treatment can be carried out by sulfide precipitation or chemical coagulation. The sulfide precipitation method uses lime milk and excess sodium sulfide as flocculants to produce insoluble mercury sulfide precipitate; the chemical coagulation method uses lime milk and coagulant as flocculants to precipitate mercury and iron or aluminum hydroxide floccules together.

[0025] All relevant parts used in this utility model can be purchased from the market. Non-standard parts can be processed and manufactured separately. Bolts, rivets, welding, etc. can be used for connection. Conventional models can be selected for each part, and the circuit connections involved can be conventionally connected. They will not be described in detail here. Matters not described in detail in this specification belong to the prior art known to professionals in this field.

[0026] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A small device for treating mercury-containing wastewater, comprising a sedimentation tank (1), a tank cover (2) fixedly mounted on the upper end of the sedimentation tank (1) by screws, and two liquid inlet pipes (3) extending through the upper end of the tank cover (2), characterized in that: Also includes: A driving motor (5) is mounted at the middle of the upper end of the box cover (2), and the output end of the driving motor (5) is connected to a stirring rod (6) located in the sedimentation box (1); a first filter screen (7) is mounted inside the sedimentation box (1), and a first fixing bolt (8) is provided through the upper side of the first filter screen (7); a guide plate (9) is mounted on the inner bottom of the sedimentation box (1) and is located outside the lower end of the first filter screen (7); A discharge pipe (10) is installed at the middle of the lower end of the sedimentation box (1), and a connecting pipe (11) is provided through the lower end of the side wall of the sedimentation box (1). A filter box (13) is provided at the right end of the sedimentation box (1), and a pump body (12) is installed on the left side of the upper end of the filter box (13), and the left end of the pump body (12) is connected to the connecting pipe (11). A second filter screen (15) and a third filter screen (16) are provided in sequence from left to right inside the filter box (13).

2. A small-scale device for treating mercury-containing wastewater according to claim 1, characterized in that: A support bracket (4) is fixedly mounted on the outer side of the lower end of the sedimentation box (1), and the filter box (13) is located on the right side of the upper end surface of the support bracket (4).

3. The small-scale device for treating mercury-containing wastewater according to claim 1, characterized in that: The first filter screen (7) forms a detachable structure with the sedimentation box (1) via a first fixing bolt (8), and the first filter screen (7) is funnel-shaped.

4. A small-scale device for treating mercury-containing wastewater according to claim 3, characterized in that: A sealing structure is provided at the connection between the first filter screen (7) and the guide plate (9), and the outer side of the guide plate (9) is arranged to be tilted downward.

5. The small-scale device for treating mercury-containing wastewater according to claim 1, characterized in that: Two plug-in slots are provided on the inner wall of the filter box (13), and the two side edges of the second filter screen (15) and the third filter screen (16) are respectively plugged into the corresponding plug-in slots.

6. The small-scale device for treating mercury-containing wastewater according to claim 5, characterized in that: A second fixing bolt (17) is provided through the upper ends of the connection points between the second filter screen (15) and the third filter screen (16) and the filter box (13), and the filter aperture size of the second filter screen (15) is larger than the filter aperture size of the third filter screen (16).

7. The small-scale device for treating mercury-containing wastewater according to claim 6, characterized in that: A drainage pipe (14) is provided at the lower right end of the filter box (13).

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