CN212025023U - A heavy metal ion precipitation device for landfill leachate - Google Patents

Abstract

The utility model belongs to the technical field of landfill leachate treatment, and particularly discloses a heavy metal ion precipitation device for landfill leachate, which comprises a main landfill leachate inlet pipe, wherein the main landfill leachate inlet pipe is connected with a pair of auxiliary landfill leachate inlet pipes, and a pretreatment tank is arranged at the water outlet of any auxiliary landfill leachate inlet pipe; a main pesticide mixing mechanism is arranged at the joint of any secondary landfill leachate inlet pipe and the pretreatment tank; one side of any pretreatment tank is connected with a flocculation tank through a landfill leachate communicating pipe, an auxiliary pesticide mixing mechanism is arranged at the joint of the landfill leachate communicating pipe and the flocculation tank, an auxiliary landfill leachate outlet pipe is arranged at one side of the flocculation tank away from the landfill leachate communicating pipe, and the auxiliary landfill leachate outlet pipe is communicated with the main landfill leachate outlet pipe; the flocculation tank is provided with a stirring mechanism, a pH value detection mechanism, a dosing mechanism and a flocculation filtering mechanism; a water inlet reversing valve is arranged at the joint of the main landfill leachate inlet pipe and the auxiliary landfill leachate inlet pipe; a water outlet reversing valve is arranged at the joint of the main landfill leachate outlet pipe and the auxiliary landfill leachate outlet pipe; the landfill leachate communicating pipe is provided with a landfill leachate communicating valve.

Description

A heavy metal ion precipitation device for landfill leachate

technical field

The utility model belongs to the technical field of landfill leachate treatment, in particular to a heavy metal ion precipitation device for landfill leachate.

Background technique

Landfill leachate refers to the moisture contained in the garbage itself in the landfill, the rain and snow water and other moisture entering the landfill, deducting the saturated water holding capacity of the garbage and the overburden, and formed through the garbage layer and the overburden. A high concentration of organic landfill leachate. Among them, the content of heavy metals in the landfill leachate is high; the landfill leachate contains more than 10 kinds of heavy metal ions, of which iron and zinc are relatively high in the acid fermentation stage, and the concentration of iron can reach about 2000mg/L; the concentration of zinc can reach about 130mg/L , the concentration of lead can reach 12.3mg/L, and the concentration of calcium can even reach 4300mg/L. The landfill leachate is slightly acidic. This acidic circular environment aggravates the dissolution of water-insoluble carbonates, heavy metals and their oxides in the landfill. Therefore, the leachate contains high concentrations of heavy metal ions, which are difficult to handle. very large; and these metal ions can seriously inhibit the biological treatment process. Therefore, heavy metal ion treatment is the focus and difficulty of landfill leachate treatment. The removal of heavy metal ions in landfill leachate includes adsorption method, biological method, coagulation adsorption method, phytoremediation method, etc. The coagulation adsorption method is usually used as the pretreatment of landfill leachate or the advanced treatment of secondary biochemical effluent. It has the advantages of good treatment effect, simple operation and easy operation and management. However, the coagulation adsorption method has problems such as long reaction time, unable to treat landfill leachate continuously, and uneven mixing of heavy metal scavenger and landfill leachate will affect the effect of removing heavy metal ions.

Utility model content

In order to solve the problems faced in the treatment of heavy metal ions in landfill leachate, a heavy metal ion precipitation device for landfill leachate that can continuously treat landfill leachate and can be stirred more uniformly is provided.

Based on the above-mentioned purpose, the utility model realizes through the following technical solutions:

A heavy metal ion precipitation device for landfill leachate, comprising a landfill leachate main inlet pipe, a pair of landfill leachate auxiliary inlet pipes are connected to the landfill leachate main inlet pipe, and any landfill leachate auxiliary inlet pipe water outlet is provided with pretreatment There is a main mixing mechanism at the connection between any landfill leachate auxiliary inlet pipe and the pretreatment box; one side of any pretreatment box is connected to a flocculation box through a landfill leachate communication pipe, and the landfill leachate communication pipe and the flocculation box The connection is provided with an auxiliary mixing mechanism, and the side of the flocculation box away from the landfill leachate communication pipe is provided with a landfill leachate auxiliary outlet pipe, which is connected with the landfill leachate main outlet pipe; the flocculation box is provided with a landfill leachate auxiliary outlet pipe. Stirring mechanism, pH value detection mechanism, dosing mechanism and flocculation filtering mechanism; water inlet reversing valve is provided at the connection between the main inlet pipe of landfill leachate and the auxiliary inlet pipe of landfill leachate; the main outlet pipe of landfill leachate and the auxiliary inlet pipe of landfill leachate are provided The outlet pipe connection is provided with a water outlet reversing valve; the landfill leachate communication pipe is provided with a landfill leachate communication valve.

Further, the main medicine mixing mechanism includes a main medicine liquid ring arranged in the landfill leachate auxiliary inlet pipe, and a plurality of uniformly distributed main medicine liquid holes are arranged in the main medicine liquid ring; Chemical liquid agitator, the stirring direction of the main chemical liquid agitator is parallel to the cross section of the landfill leachate auxiliary inlet pipe, the main chemical liquid agitator is matched with the main chemical liquid ring; the main chemical liquid agitator includes and the landfill leachate The stirring blade matched with the auxiliary inlet pipe, and the main stirring motor is arranged in the center of the stirring blade.

Further, the main chemical liquid ring is connected with a plurality of main chemical liquid branch pipes arranged outside the landfill leachate auxiliary inlet pipe, any main chemical liquid branch pipe is communicated with the main chemical liquid main pipe, and the main chemical liquid main pipe is provided with a main chemical liquid pipe. Liquid control valve.

Further, the auxiliary medicine mixing mechanism includes an auxiliary medicine liquid ring arranged in the landfill leachate communication pipe, the auxiliary medicine liquid ring is provided with a plurality of evenly distributed auxiliary medicine liquid holes; the landfill leachate communication pipe is provided with auxiliary medicine liquid Stirrer, the stirring direction of the auxiliary chemical liquid agitator is parallel to the cross section of the landfill leachate communication pipe, and the auxiliary chemical liquid agitator is matched with the auxiliary chemical liquid ring; the auxiliary chemical liquid agitator includes a connection with the landfill leachate. The matching stirring blade has an auxiliary stirring motor in the center of the stirring blade; the auxiliary liquid medicine ring is connected with a plurality of auxiliary liquid medicine branch pipes arranged outside the landfill leachate communication pipe, and any auxiliary liquid medicine branch pipe is connected with the auxiliary liquid medicine The main pipe is connected, and the auxiliary liquid control valve is arranged on the auxiliary liquid main pipe.

Further, the main chemical liquid branch pipe is axisymmetric relative to the cross section of the landfill leachate auxiliary inlet pipe; the auxiliary chemical liquid branch pipe is axisymmetric relative to the cross section of the landfill leachate communication pipe; The auxiliary chemical liquid ring is in contact with the inner side wall of the landfill leachate communication pipe.

Further, the main medicinal liquid agitator is arranged in the landfill leachate auxiliary inlet pipe between the main medicinal liquid ring and the pretreatment tank; the auxiliary medicinal liquid agitator is arranged in the landfill leachate between the auxiliary medicinal liquid ring and the flocculation tank. in the connecting pipe.

Further, the stirring mechanism includes a flocculation agitator matched with the flocculation box, and the flocculation agitator is connected with the flocculation stirring motor arranged on the flocculation box; the pH value detection mechanism includes a pH value sensor, and the pH value sensor is connected with a pH value display. The dosing mechanism includes a dosing port arranged on the flocculation box, and the dosing port is provided with a dosing sealing cover.

Further, the flocculation filtering mechanism includes a flocculation filter screen arranged at the connection between the flocculation box and the landfill leachate auxiliary outlet pipe, the flocculation cleaning port matched with the flocculation filter screen is arranged on the landfill leachate auxiliary outlet pipe, and the flocculation cleaning port is provided with a flocculation cleaning port. Seal cap.

Compared with the prior art, the beneficial effects of the present utility model are as follows:

(1) The utility model realizes the mixing of the heavy metal scavenger liquid and the landfill leachate by setting the main mixing mechanism and the auxiliary mixing mechanism. The mixing method is performed in the landfill leachate auxiliary inlet pipe and the landfill leachate communication pipe. The mixing of chemical liquid and landfill leachate can improve the uniformity of heavy metal scavenger chemical liquid and landfill leachate. The pre-stirring device is installed on the treatment box to stir the mixed liquid; the setting of the flocculation box is used to further flocculate the mixed liquid, and the flocculation filtering mechanism filters and collects the flocs; The mixed solution is further added with a coagulant to accelerate the precipitation of heavy metals in the mixed solution; the pH value detection mechanism monitors the pH value in the mixed solution and displays it in real time, which is convenient for adjusting the pH value of the mixed solution, and it is convenient for the liquid to mix with the liquid at a suitable pH. The heavy metals in the landfill leachate react to speed up the precipitation of heavy metal ions.

(2) The main chemical liquid ring is convenient for adding heavy metal scavengers to the landfill leachate in the landfill leachate auxiliary inlet pipe. The setting of the main chemical liquid stirrer is convenient to uniformly stir the landfill leachate after adding the heavy metal catching agent. The main stirring motor The stirring blade is driven to mix the landfill leachate and the heavy metal scavenger efficiently; the design of the main chemical liquid branch pipe is convenient to apply medicine to the main chemical liquid ring at the same time, so as to achieve the purpose of uniformly discharging medicine from the main chemical liquid hole on the main chemical liquid ring, The main chemical liquid control valve controls whether to add medicine to the main chemical liquid branch pipe through the main chemical liquid main pipe, so as to reduce the waste of chemical liquid.

(3) The auxiliary chemical liquid ring is convenient for adding coagulant to the landfill leachate in the landfill leachate communication pipe, and the auxiliary chemical liquid stirrer is convenient to uniformly stir the landfill leachate after adding the coagulant, and the auxiliary stirring motor drives the The stirring blade mixes the landfill leachate and coagulant efficiently; the design of the auxiliary liquid medicine branch pipe is convenient to apply medicine to the auxiliary liquid medicine ring at the same time, so as to realize the purpose of uniformly discharging medicine from the auxiliary liquid medicine hole on the auxiliary liquid medicine ring, and assist the The liquid medicine control valve controls whether to add medicine to the auxiliary liquid medicine branch pipe through the auxiliary liquid medicine main pipe, so as to reduce the waste of medicine liquid.

(4) The symmetrical design of the main liquid medicine branch pipe can ensure that the main liquid medicine hole on the main liquid medicine liquid ring is evenly discharged to the maximum extent, and the symmetrical design of the auxiliary liquid medicine liquid branch pipe can ensure the auxiliary liquid medicine on the auxiliary liquid medicine liquid ring to the greatest extent. The holes are uniformly discharged; the main chemical liquid ring is in contact with the inner wall of the landfill leachate auxiliary inlet pipe, which can stably fix the main chemical liquid ring on the inner wall of the landfill leachate auxiliary inlet pipe; the auxiliary chemical liquid ring and the garbage The inner side wall of the leachate communication pipe is in contact with each other, and the auxiliary liquid medicine ring can be fixed on the inner wall of the landfill leachate communication pipe; the main chemical liquid stirrer is arranged on the landfill leachate pair between the main chemical liquid ring and the pretreatment tank. Into the pipe, it is convenient to uniformly stir the mixed liquid after adding the heavy metal scavenger liquid; the auxiliary liquid agitator is arranged in the landfill leachate communication pipe between the auxiliary liquid ring and the flocculation tank; it is convenient to add the coagulant liquid. The liquid mixture is evenly stirred.

(5) The function of the flocculation stirrer can not only stir the mixed liquid of landfill leachate added with coagulant, but also can stir the mixed liquid of the subsequently added agent for adjusting the pH, and can also add the coagulant through the dosing port. The mixed solution is stirred to speed up the precipitation of heavy metal ions; the pH value detection mechanism detects the pH value of the landfill leachate mixed solution in real time, which is convenient for adjusting the pH value of the landfill leachate mixed solution through the dosing port, and the pH value display shows the pH value in real time. , it is convenient to monitor and adjust the pH; the dosing sealing cover plays the role of sealing the dosing port when dosing is not required.

(6) The flocculation filter screen intercepts and collects the flocculation completed flocs, takes out and treats the accumulated flocs through the flocculation cleaning port, and seals the flocculation cleaning port with the flocculation sealing cover.

To sum up, the utility model realizes adding and stirring the heavy metal scavenger in the landfill leachate auxiliary inlet pipe by setting the main chemical liquid ring and the main chemical liquid agitator in the landfill leachate auxiliary inlet pipe, which not only mixes more uniformly, In addition, the mixing of heavy metal scavengers is more efficient and fast, reducing the mixing speed of heavy metal scavengers in landfill leachate, and mixing with heavy metal scavengers before entering the pretreatment tank, reducing the stirring time of coagulation adsorption method, and auxiliary drugs. The design of the liquid ring and auxiliary liquid agitator realizes the addition of coagulant and rapid stirring and mixing, which further reduces the stirring time of the coagulation adsorption method and accelerates the removal of heavy metals in the landfill leachate. The design of a pair of pretreatment tanks When one pretreatment tank is reacting, another pretreatment tank can be used for landfill leachate treatment to achieve the effect of uninterrupted treatment.

Description of drawings

Fig. 1 is the connection schematic diagram of the present utility model in embodiment 1;

Fig. 2 is the schematic diagram of main medicinal liquid ring in embodiment 1;

3 is a schematic diagram of an auxiliary medicinal liquid ring in Example 1.

In the figure, 1. the main inlet pipe of landfill leachate, 2, the water inlet control valve, 3, the water inlet reversing valve, 4, the auxiliary inlet pipe of landfill leachate, 5, the main liquid medicine branch pipe, 6, the main chemical liquid main pipe, 7. Pretreatment tank, 8. Landfill leachate communication valve, 9. Landfill leachate communication pipe, 10. Auxiliary liquid medicine branch pipe, 11. Auxiliary liquid medicine main pipe, 12. Flocculation tank, 13. pH value detection mechanism, 14, Stirring mechanism, 15. Dosing mechanism, 16. Flocculation filtration mechanism, 17. Landfill leachate auxiliary outlet pipe, 18. Outlet reversing valve, 19. Outlet water control valve, 20. Landfill leachate main outlet pipe, 21. Main drug Liquid ring, 22, main liquid nozzle, 23, main liquid hole, 24, auxiliary liquid ring, 25, auxiliary liquid nozzle, 26, auxiliary liquid hole.

Detailed ways

The present utility model is further described below through specific examples, but does not limit the scope of the present utility model.

Example 1:

A heavy metal ion precipitation device for landfill leachate, whose structure is shown in Figures 1-3, includes a landfill leachate main inlet pipe 1, and a pair of landfill leachate auxiliary inlet pipes 4 are connected to the landfill leachate main inlet pipe 1. A pretreatment box 7 is provided at the water outlet of any landfill leachate auxiliary inlet pipe 4; A flocculation box 12 is connected through the landfill leachate communication pipe 9 , an auxiliary mixing mechanism is provided at the connection between the landfill leachate communication pipe 9 and the flocculation box 12 , and the side of the flocculation box 12 away from the landfill leachate communication pipe 9 is provided with landfill leachate Auxiliary outlet pipe 17, the landfill leachate auxiliary outlet pipe 17 is communicated with the landfill leachate main outlet pipe 20; the flocculation box 12 is provided with a stirring mechanism 14, a pH value detection mechanism 13, a dosing mechanism 15 and a flocculation filter mechanism 16; A water inlet reversing valve 3 is provided at the connection between the main leachate inlet pipe 1 and the landfill leachate auxiliary inlet pipe 4; a water outlet reversing valve 18 is arranged at the connection between the landfill leachate main outlet pipe 20 and the landfill leachate auxiliary outlet pipe 17; The landfill leachate communication pipe 9 is provided with a landfill leachate communication valve 8 .

The main chemical mixing mechanism includes a main chemical liquid ring 21 arranged in the landfill leachate auxiliary inlet pipe 4, and a plurality of uniformly distributed main chemical liquid holes 23 are arranged in the main chemical liquid ring 21; the landfill leachate auxiliary inlet pipe 4 There is a main chemical liquid stirrer inside, the stirring direction of the main chemical liquid agitator is parallel to the cross section of the landfill leachate auxiliary inlet pipe 4, and the main chemical liquid agitator is matched with the main chemical liquid ring 21; the main chemical liquid is stirred. The device includes a stirring blade matched with the auxiliary inlet pipe 4 of the landfill leachate, and a main stirring motor is arranged in the center of the stirring blade. The main chemical liquid ring 21 is communicated with a plurality of main chemical liquid branch pipes 5 arranged outside the landfill leachate auxiliary inlet pipe 4, any main chemical liquid branch pipe 5 is communicated with the main chemical liquid main pipe 6, and the main chemical liquid main pipe 6 is connected to the main chemical liquid main pipe 6. Equipped with the main liquid control valve. The auxiliary medicine mixing mechanism includes an auxiliary medicine liquid ring 24 arranged in the landfill leachate communication pipe 9, and a plurality of evenly distributed auxiliary medicine liquid holes 26 are arranged in the auxiliary medicine liquid ring 24; There is an auxiliary medicinal liquid agitator, the stirring direction of the auxiliary medicinal liquid agitator is parallel to the cross section of the landfill leachate communication pipe 9, and the auxiliary medicinal liquid agitator is matched with the auxiliary medicinal liquid ring 24; the auxiliary medicinal liquid agitator includes and A stirring blade matched with the landfill leachate communication pipe 9, an auxiliary stirring motor is arranged in the center of the stirring blade; the auxiliary liquid medicine ring 24 is communicated with a plurality of auxiliary liquid medicine branch pipes 10 arranged outside the landfill leachate communication pipe 9, Any auxiliary medicinal liquid branch pipe 10 is communicated with the auxiliary medicinal liquid main pipe 11 , and an auxiliary medicinal liquid control valve is provided on the auxiliary medicinal liquid main pipe 11 . The main chemical liquid branch pipe 5 is axisymmetric with respect to the cross section of the landfill leachate auxiliary inlet pipe 4; the auxiliary chemical liquid branch pipe 10 is axisymmetric with respect to the cross section of the landfill leachate communication pipe 9; the main chemical liquid ring 21 and the inner side of the landfill leachate auxiliary inlet pipe 4 The walls are in contact with each other; the auxiliary chemical liquid ring 24 is in contact with the inner side wall of the landfill leachate communication pipe 9 . The main chemical liquid agitator is arranged in the landfill leachate auxiliary inlet pipe 4 between the main chemical liquid ring 21 and the pretreatment tank 7; the auxiliary chemical liquid agitator is arranged between the auxiliary chemical liquid ring 24 and the flocculation tank 12. The landfill leachate communicates in the pipe 9 .

The stirring mechanism 14 includes a flocculation agitator matched with the flocculation box 12, and the flocculation agitator is connected with the flocculation stirring motor arranged on the flocculation box 12; the pH value detection mechanism 13 includes a pH value sensor, and the pH value sensor is connected with a pH value Display; the dosing mechanism 15 includes a dosing port arranged on the flocculation box 12, and a dosing sealing cover is provided on the dosing port. The flocculation filter mechanism 16 includes a flocculation filter screen arranged at the connection between the flocculation box 12 and the landfill leachate auxiliary outlet pipe 17. The landfill leachate auxiliary outlet pipe 17 is provided with a flocculation cleaning port matched with the flocculation filter screen, and the flocculation cleaning port is provided with Flocculation seal cap. The main inlet pipe 1 of the landfill leachate of the device is located at the highest point of the device, the position of the pretreatment box 7 is higher than the position of the flocculation box 12, the intermediate equipment is lowered in height, and the main outlet pipe 20 of landfill leachate is located at the lowest point of the device. Therefore, the device can flocculate and filter heavy metal ions by the gravity of the landfill leachate itself, and can also add equipment such as a water pump to perform power-assisted filtration operations.

When in use, open the water inlet control valve 2, the landfill leachate begins to flow to the main inlet pipe 1 of landfill leachate, and through the reversal of the water inlet reversing valve 3, the landfill leachate flows to the auxiliary inlet pipe 4 of the landfill leachate on one side, open The main chemical liquid control valve makes the chemical liquid of the heavy metal scavenger supply the chemical liquid of the heavy metal scavenger to the main mixing mechanism through the main chemical liquid main pipe 6 and the main chemical liquid branch pipe 5, and the chemical liquid flows to the main chemical liquid through the main chemical liquid nozzle 22 The ring 21, the main liquid ring 21 is a double-layer ring structure, the inner ring and the outer ring are gap-fitted and tightly connected, and the inner ring is provided with a plurality of uniformly distributed main liquid holes 23, The medicinal liquid reaches the main medicinal liquid hole 23 through the gap between the inner and outer ring shapes, and then mixes with the landfill leachate in the landfill leachate auxiliary inlet pipe 4, wherein the main medicinal liquid branch pipe 5 is designed to be combined with the landfill leachate auxiliary pipe 5. The inlet pipe 4 is designed in a certain proportion, which is in line with the mixing ratio of the chemical liquid and the landfill leachate, and the same flow rate is used to ensure the appropriate range of the mixing ratio; the mixed liquid of the landfill leachate and the heavy metal scavenger reaches the main chemical liquid mixer. At the position of the stirring blade, the stirring motor drives the stirring blade to rotate, and the mixed liquid is uniformly stirred. The uniformly stirred mixed liquid flows into the pretreatment tank 7. After a period of time, the pretreatment tank 7 is filled with the mixed liquid, and the main mixer is closed. The medicine mechanism is used to make the landfill leachate mixed with the medicinal solution react in the pretreatment tank 7, control the water inlet reversing valve 3 to turn, so that the landfill leachate flows to the other side of the landfill leachate auxiliary inlet pipe 4, and repeat the above steps, The other side of the pretreatment tank 7 is filled with the mixed liquid, and the landfill leachate of the mixed chemical liquid is reacted in the pretreatment tank 7. At this time, the reaction of the mixed liquid in the one side of the pretreatment tank is completed, and the garbage on one side is opened. The leachate communication valve 8, the mixed liquid after the reaction flows to the flocculation tank 12 through the landfill leachate communication pipe 9, the auxiliary medicinal liquid control valve is opened, and the medicinal liquid of the coagulant flows to the auxiliary medicinal liquid through the auxiliary medicinal liquid main pipe 11 and the auxiliary medicinal liquid branch pipe 10. The medicine mixing mechanism provides the medicine liquid of the coagulant, and the medicine liquid flows to the auxiliary medicine liquid ring 24 through the auxiliary medicine liquid nozzle 25. The auxiliary medicine liquid ring 24 is a double-layer ring structure, and the inner layer ring type and the outer layer ring type gap. Matching and sealing connection, the inner ring is provided with a plurality of evenly distributed auxiliary liquid holes 26, the liquid reaches the auxiliary liquid holes 26 through the gap between the inner and outer ring shapes, and then communicates with the landfill leachate. The mixed liquid in 9 is mixed, wherein, the landfill leachate communication pipe 9 is designed to be designed in a certain proportion with the auxiliary liquid medicine branch pipe 10, which is in line with the mixing ratio of the liquid medicine and the mixed liquid, and the same flow rate is used to ensure the appropriate range of the mixing ratio. The mixed liquid of the mixed liquid and the coagulant reaches the stirring blade position of the auxiliary liquid agitator, the stirring motor drives the stirring blade to rotate, and the mixed liquid is evenly stirred, and the uniformly stirred mixed liquid flows into the flocculation box 12, after After a period of time, the flocculation box 12 is filled with the mixed liquid, the auxiliary mixing mechanism and the landfill leachate communication valve 8 are closed, so that the landfill leachate mixed with the coagulant reacts in the flocculation box 12, and the landfill leachate on the other side is opened. Connecting valve 8, adding flocculant to the mixed solution after the reaction on the other side of the above steps is completed; while opening the other side landfill leachate communication valve 8 , the pretreatment box 7 on one side is in an empty state, and the addition of landfill leachate liquid can be performed again; after a period of time, the flocculant reaction of the flocculation box 12 on one side is completed, and the auxiliary agent is added through the dosing port on the dosing mechanism 15. After a certain period of time, the water outlet control valve 19 on the landfill leachate main outlet pipe 20 is opened and the outlet water reversing valve 18 is adjusted, so that one side of the flocculation box The mixed solution that has completed the reaction in 12 flows to the landfill leachate main outlet pipe 20 through the landfill leachate auxiliary outlet pipe 17, and the flocculation filter screen on the flocculation filter mechanism 16 filters the flocculated heavy metal ions, and enters the next step of landfill leachate treatment. Procedure: According to the above steps, the flocculation box 12 on the other side is filtered and treated for flocculation. The flocculation box 12 and the pretreatment box 7 are provided with exhaust holes to facilitate the inflow of landfill leachate into the two boxes.

The above are only preferred embodiments of the present invention, but are not limited to the above-mentioned examples. Any modifications, equivalent replacements and improvements made within the spirit and principles of the present invention shall be included in the scope of the present invention. within the scope of protection.

Claims (8)

1. a heavy metal ion precipitation device for landfill leachate, it is characterized in that, comprise landfill leachate main inlet pipe, landfill leachate main inlet pipe is connected with a pair of landfill leachate auxiliary inlet pipes, any landfill leachate auxiliary inlet pipe The water outlet is provided with a pretreatment box; the connection between any of the landfill leachate auxiliary inlet pipes and the pretreatment box is provided with a main mixing mechanism; one side of any of the pretreatment boxes is connected with a flocculation through a landfill leachate communication pipe There is an auxiliary mixing mechanism at the connection between the landfill leachate communication pipe and the flocculation box. The side of the flocculation box away from the landfill leachate communication pipe is provided with a landfill leachate auxiliary outlet pipe, which is connected to the landfill leachate main outlet. The outlet pipe is connected; the flocculation box is provided with a stirring mechanism, a pH value detection mechanism, a dosing mechanism and a flocculation filtering mechanism; the connection between the landfill leachate main inlet pipe and the landfill leachate auxiliary inlet pipe is provided with an inlet water changer A water outlet reversing valve is provided at the connection between the landfill leachate main outlet pipe and the landfill leachate auxiliary outlet pipe; the landfill leachate communication pipe is provided with a landfill leachate communication valve. 2 . The heavy metal ion precipitation device for landfill leachate according to claim 1 , wherein the main medicine mixing mechanism comprises a main medicine liquid ring arranged in the landfill leachate auxiliary inlet pipe, and the main medicine liquid ring is arranged in the main medicine liquid ring. 3 . There are a plurality of uniformly distributed main chemical liquid holes; the main chemical liquid agitator is arranged in the landfill leachate auxiliary inlet pipe, and the stirring direction of the main chemical liquid agitator is parallel to the cross section of the landfill leachate auxiliary inlet pipe. The chemical liquid agitator is matched with the main chemical liquid ring; the main chemical liquid agitator includes a stirring blade matched with the landfill leachate auxiliary inlet pipe, and the center of the stirring blade is provided with a main stirring motor. 3. The heavy metal ion precipitation device for landfill leachate according to claim 2, characterized in that, the main chemical liquid ring is communicated with a plurality of main chemical liquid branch pipes arranged outside the landfill leachate auxiliary inlet pipe, and any A main medicinal liquid branch pipe is communicated with the main medicinal liquid main pipe, and the main medicinal liquid main pipe is provided with a main medicinal liquid control valve. 4. The heavy metal ion precipitation device for landfill leachate according to claim 3, wherein the auxiliary medicine mixing mechanism comprises an auxiliary medicine liquid ring arranged in the landfill leachate communication pipe, and the auxiliary medicine liquid ring is provided with an auxiliary medicine liquid ring. There are a plurality of evenly distributed auxiliary medicinal liquid holes; the landfill leachate communication pipe is provided with an auxiliary medicinal liquid agitator, and the stirring direction of the auxiliary medicinal liquid agitator is parallel to the cross section of the landfill leachate communication pipe, and the auxiliary medicinal liquid is stirred. The auxiliary medicinal liquid agitator is matched with the auxiliary medicinal liquid ring; the auxiliary medicinal liquid agitator includes a stirring blade matched with the landfill leachate communication pipe, and an auxiliary stirring motor is arranged in the center of the stirring blade; A plurality of auxiliary medicinal liquid branch pipes outside the landfill leachate communication pipe are connected, and any auxiliary medicinal liquid branch pipe is communicated with the auxiliary medicinal liquid main pipe, and an auxiliary medicinal liquid control valve is arranged on the auxiliary medicinal liquid main pipe. 5 . The heavy metal ion precipitation device for landfill leachate according to claim 4 , wherein the main medicinal liquid branch pipe is axisymmetric relative to the landfill leachate auxiliary inlet pipe; the auxiliary medicinal liquid branch pipe is relative to the landfill leachate The cross section of the communication pipe is axisymmetric; the main chemical liquid ring is fitted with the inner side wall of the landfill leachate auxiliary inlet pipe; the auxiliary chemical liquid ring is fitted with the inner side wall of the landfill leachate communication pipe. 6. The heavy metal ion precipitation device for landfill leachate according to claim 5, wherein the main chemical agitator is arranged in the landfill leachate auxiliary inlet pipe between the main chemical liquid ring and the pretreatment tank; The auxiliary medicinal liquid agitator is arranged in the landfill leachate communication pipe between the auxiliary medicinal liquid ring and the flocculation tank. 7. The heavy metal ion precipitation device for landfill leachate according to claim 1 or 6, wherein the stirring mechanism comprises a flocculation agitator matched with a flocculation box, and the flocculation agitator and the flocculation agitator arranged on the flocculation box The stirring motor is connected; the pH value detection mechanism includes a pH value sensor, and the pH value sensor is connected with a pH value display; the drug addition mechanism includes a drug addition port arranged on the flocculation box, and the drug addition port is provided with a drug addition seal cover. 8 . The heavy metal ion precipitation device for landfill leachate according to claim 7 , wherein the flocculation filtering mechanism comprises a flocculation filter screen arranged at the connection between the flocculation box and the landfill leachate auxiliary outlet pipe, and the landfill leachate auxiliary A flocculation cleaning port matched with a flocculation filter screen is arranged on the outlet pipe, and a flocculation sealing cover is arranged on the flocculation cleaning port.

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