CN212025023U

CN212025023U - Heavy metal ion precipitation device for landfill leachate

Info

Publication number: CN212025023U
Application number: CN202020516151.3U
Authority: CN
Inventors: 白书永; 张霞; 白羽洁
Original assignee: Henan Hengtai Environmental Protection Engineering Co ltd
Current assignee: Henan Hengtai Environmental Protection Engineering Co ltd
Priority date: 2020-04-10
Filing date: 2020-04-10
Publication date: 2020-11-27
Anticipated expiration: 2030-04-10

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

Heavy metal ion precipitation device for landfill leachate

Technical Field

The utility model belongs to the technical field of landfill leachate handles, concretely relates to heavy metal ion deposits device for landfill leachate.

Background

The landfill leachate is high-concentration organic landfill leachate which is formed by deducting the saturated water holding capacity of the garbage and a soil covering layer from the water contained in the garbage in a garbage landfill, rain, snow and water entering the landfill and other water and passing through the garbage layer and the soil covering layer. Wherein the landfill leachate has high heavy metal content; the landfill leachate contains more than 10 heavy metal ions, wherein iron and zinc are higher in the acid fermentation stage, and the concentration of iron can reach about 2000 mg/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 of microorganism nutrient element proportion imbalance in 1.6 percolate, mainly C, N, P proportion imbalance; because the garbage leachate is slightly acidic due to the dissolution of CO2 generated by the degradation of the garbage, the slightly acidic environment aggravates the dissolution of water-insoluble carbonate, heavy metal oxide and the like in the garbage, so that the leachate contains heavy metal ions with higher concentration and has very large treatment difficulty; and these metal ions can severely inhibit the biological treatment process. Therefore, heavy metal ion treatment is the key and difficult point of landfill leachate treatment. The method for removing the heavy metal ions in the landfill leachate comprises an adsorption method, a biological method, a coagulation adsorption method, a plant restoration method and the like, wherein the coagulation adsorption method is usually used for pretreatment of the landfill leachate or advanced treatment of secondary biochemical effluent, and the method has the advantages of good treatment effect, simplicity and convenience in operation, easiness in operation and management and the like. However, the coagulation adsorption method has the problems that the reaction time is long, the landfill leachate cannot be treated continuously, and the effect of removing heavy metal ions can be influenced by uneven mixing of the heavy metal capture agent and the landfill leachate.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem faced when heavy metal ion handles in the landfill leachate, provide one kind can be continuously handle landfill leachate and can be more even carry out the heavy metal ion precipitation device for landfill leachate of stirring.

Based on the above-mentioned purpose, the utility model discloses a following technical scheme realizes:

a heavy metal ion precipitation device for landfill leachate comprises a main landfill leachate inlet pipe, wherein a pair of auxiliary landfill leachate inlet pipes are connected to the main landfill leachate inlet pipe, 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.

Further, the main medicine mixing mechanism comprises a main medicine liquid circular ring arranged in the secondary garbage leachate inlet pipe, and a plurality of main medicine liquid holes which are uniformly distributed are formed in the main medicine liquid circular ring; a main liquid medicine stirrer is arranged in the auxiliary garbage leachate inlet pipe, the stirring direction of the main liquid medicine stirrer is parallel to the cross section of the auxiliary garbage leachate inlet pipe, and the main liquid medicine stirrer is matched with the main liquid medicine circular ring; the main liquid medicine stirrer comprises a stirring paddle blade matched with the auxiliary garbage leachate inlet pipe, and a main stirring motor is arranged at the center of the stirring paddle blade.

Furthermore, the main liquid medicine circular ring is communicated with a plurality of main liquid medicine branch pipes arranged outside the secondary garbage leachate inlet pipe, any main liquid medicine branch pipe is communicated with the main liquid medicine main pipe, and the main liquid medicine main pipe is provided with a main liquid medicine control valve.

Furthermore, the auxiliary medicine mixing mechanism comprises an auxiliary medicine liquid ring arranged in the landfill leachate communicating pipe, and a plurality of auxiliary medicine liquid holes which are uniformly distributed are arranged in the auxiliary medicine liquid ring; an auxiliary liquid medicine stirrer is arranged in the landfill leachate communicating pipe, the stirring direction of the auxiliary liquid medicine stirrer is parallel to the cross section of the landfill leachate communicating pipe, and the auxiliary liquid medicine stirrer is matched with an auxiliary liquid medicine circular ring; the auxiliary liquid medicine stirrer comprises a stirring paddle matched with the landfill leachate communicating pipe, and an auxiliary stirring motor is arranged in the center of the stirring paddle; the auxiliary liquid medicine circular ring is communicated with a plurality of auxiliary liquid medicine branch pipes arranged outside the landfill leachate communicating pipe, any auxiliary liquid medicine branch pipe is communicated with an auxiliary liquid medicine main pipe, and an auxiliary liquid medicine control valve is arranged on the auxiliary liquid medicine main pipe.

Furthermore, the main liquid medicine branch pipe is axially symmetrical relative to the cross section of the secondary landfill leachate inlet pipe; the auxiliary liquid medicine branch pipe is axially symmetrical relative to the cross section of the landfill leachate communicating pipe; the main liquid medicine circular ring is attached to the inner side wall of the secondary landfill leachate inlet pipe; the auxiliary liquid medicine circular ring is attached to the inner side wall of the landfill leachate communicating pipe.

Further, the main liquid medicine stirrer is arranged in a secondary garbage percolate inlet pipe between the main liquid medicine circular ring and the pretreatment tank; the auxiliary liquid medicine stirrer is arranged in the garbage percolate communicating pipe between the auxiliary liquid medicine circular ring and the flocculation tank.

Further, the stirring mechanism comprises a flocculation stirrer matched with the flocculation tank, and the flocculation stirrer is connected with a flocculation stirring motor arranged on the flocculation tank; the pH value detection mechanism comprises a pH value sensor, and a pH value display is connected to the pH value sensor; the dosing mechanism comprises a dosing port arranged on the flocculation box, and a dosing sealing cover is arranged on the dosing port.

Further, flocculation filter mechanism is equipped with flocculation filter screen matched with flocculation clearance mouth including setting up the flocculation filter screen at flocculation case and the vice exit tube junction of landfill leachate on the vice exit tube of landfill leachate, is equipped with the sealed lid of flocculation on the flocculation clearance mouth.

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

(1) the utility model discloses a set up main medicine mechanism and supplementary medicine mechanism that mixes, realize the mixture to heavy metal catching agent liquid medicine and landfill leachate, this mixed mode is through carrying out the mixture of liquid medicine and landfill leachate in the vice admission pipe of landfill leachate and landfill leachate communicating pipe, this mixed mode can improve the degree of consistency of heavy metal catching agent liquid medicine and landfill leachate, after the mixture that the completion of mixing gets into the preliminary treatment case, if need stir when heavy metal precipitation with higher speed, can install the preliminary mixing device additional on the preliminary treatment case and stir mixed liquid; the flocculation box is arranged to further flocculate the mixed liquid, and the flocculation filtering mechanism filters and collects flocculates; the arrangement of the dosing mechanism is convenient for further adding coagulant aids into the mixed liquid after the coagulant is added so as to accelerate the precipitation of heavy metals in the mixed liquid; the pH value detection mechanism monitors the pH value in the mixed liquid and displays the pH value in real time, so that the pH value of the mixed liquid is conveniently adjusted, the liquid medicine is conveniently reacted with heavy metal in the landfill leachate under a proper pH value, and the precipitation speed of heavy metal ions is accelerated.

(2) The main liquid medicine circular ring is convenient for adding a heavy metal catching agent into the landfill leachate in the secondary landfill leachate inlet pipe, the main liquid medicine stirrer is convenient for uniformly stirring the landfill leachate added with the heavy metal catching agent, and the main stirring motor drives the stirring blades to efficiently mix the landfill leachate and the heavy metal catching agent; the design of main liquid medicine branch pipe is convenient while is used medicine to main liquid medicine ring, realizes the purpose that main liquid medicine hole on the main liquid medicine ring evenly goes out the medicine, and main liquid medicine control valve control is whether to add medicine to main liquid medicine branch pipe through main liquid medicine main pipe, and it is extravagant to reduce the liquid medicine.

(3) The auxiliary liquid medicine circular ring is convenient for adding a coagulant into the landfill leachate in the landfill leachate communicating pipe, the arrangement of the auxiliary liquid medicine stirrer is convenient for uniformly stirring the landfill leachate added with the coagulant, and the auxiliary stirring motor drives the stirring paddle to efficiently mix the landfill leachate and the coagulant; the design of supplementary liquid medicine branch pipe is convenient simultaneously to supplementary liquid medicine ring and is used medicine, realizes the purpose that supplementary liquid medicine hole on the supplementary liquid medicine ring evenly goes out the medicine, and supplementary liquid medicine control valve control is whether to add medicine through supplementary liquid medicine person in charge to supplementary liquid medicine branch pipe, and it is extravagant to reduce the liquid medicine.

(4) The main liquid medicine branch pipe is symmetrically designed to ensure that main liquid medicine holes in the main liquid medicine circular ring can uniformly discharge medicine to the maximum extent, and the auxiliary liquid medicine branch pipe is symmetrically designed to ensure that auxiliary liquid medicine holes in the auxiliary liquid medicine circular ring can uniformly discharge medicine to the maximum extent; the main liquid medicine circular ring is attached to the inner side wall of the secondary garbage leachate inlet pipe, and can be stably fixed on the inner wall of the secondary garbage leachate inlet pipe; the auxiliary liquid medicine circular ring is attached to the inner side wall of the landfill leachate communicating pipe, and can be fixed on the inner wall of the landfill leachate communicating pipe; the main liquid medicine stirrer is arranged in a secondary garbage leachate inlet pipe between the main liquid medicine circular ring and the pretreatment tank, so that the mixed liquid after the metal catching agent liquid medicine is added is conveniently and uniformly stirred; the auxiliary liquid medicine stirrer is arranged in the garbage percolate communicating pipe between the auxiliary liquid medicine circular ring and the flocculation tank; the mixed liquid added with coagulant liquid medicine is conveniently and uniformly stirred.

(5) The flocculation stirrer can be used for stirring the garbage leachate mixed solution added with the coagulant, stirring the mixed solution subsequently added with the medicament for adjusting the pH value, and stirring the mixed solution added with the coagulant aid through the medicament adding port to accelerate the precipitation of heavy metal ions; the pH value detection mechanism detects the pH value of the landfill leachate mixed liquid in real time, so that the pH value of the landfill leachate mixed liquid is conveniently adjusted through the dosing port, and the pH value display displays the pH value in real time, so that the monitoring and the pH value adjustment are convenient; the medicine adding sealing cover plays a role in sealing the medicine adding opening when medicine adding is not needed.

(6) The flocculation filter screen intercepts and collects flocculated flocculates, the accumulated flocculates are taken out through the flocculation cleaning port and are treated, and the flocculation sealing cover seals the flocculation cleaning port.

To sum up, the utility model realizes the addition and the stirring of the heavy metal catching agent in the secondary inlet pipe of the landfill leachate by arranging the main liquid medicine ring and the main liquid medicine stirrer in the secondary inlet pipe of the landfill leachate, not only the mixing is more uniform, but also the mixing of the heavy metal catching agent is more efficient and faster, the mixing speed of the heavy metal catching agent in the landfill leachate is reduced, the heavy metal catching agent is mixed with the heavy metal catching agent before entering the pretreatment tank, the stirring time of the coagulation adsorption method is reduced, the design of the auxiliary liquid medicine ring and the auxiliary liquid medicine stirrer realizes the addition and the fast stirring mixing of the coagulant, the stirring time of the coagulation adsorption method is further reduced, the removal speed of the heavy metal in the landfill leachate is accelerated, the design of a pair of pretreatment tanks can react in one pretreatment tank, the landfill leachate is treated by using the other pretreatment tank, the effect of uninterrupted processing is realized.

Drawings

Fig. 1 is a schematic connection diagram of the present invention in embodiment 1;

FIG. 2 is a schematic view of the main chemical liquid ring in example 1;

FIG. 3 is a schematic view of an auxiliary liquid medicine ring in example 1.

In the figure, 1, a main garbage leachate inlet pipe, 2, a water inlet control valve, 3, a water inlet reversing valve, 4, a secondary garbage leachate inlet pipe, 5, a main liquid medicine branch pipe, 6, a main liquid medicine main pipe, 7, a pretreatment tank, 8, a garbage leachate communicating valve, 9, a garbage leachate communicating pipe, 10, a secondary garbage leachate branch pipe, 11, a secondary garbage leachate main pipe, 12, a flocculation tank, 13, a pH value detection mechanism, 14, a stirring mechanism, 15, a dosing mechanism, 16, a flocculation filtering mechanism, 17, a secondary garbage leachate outlet pipe, 18, a water outlet reversing valve, 19, a water outlet control valve, 20, a main garbage leachate outlet pipe, 21, a main liquid medicine ring, 22, a main medicine nozzle, 23, a main medicine liquid hole, 24, a secondary medicine liquid medicine ring, 25, a secondary medicine nozzle, 26 and a secondary medicine hole.

Detailed Description

The present invention is further illustrated by the following specific examples, which are not intended to limit the scope of the invention.

Example 1:

a heavy metal ion precipitation device for landfill leachate is structurally shown in figures 1-3 and comprises a main landfill leachate inlet pipe 1, wherein the main landfill leachate inlet pipe 1 is connected with a pair of auxiliary landfill leachate inlet pipes 4, and a pretreatment tank 7 is arranged at the water outlet of any auxiliary landfill leachate inlet pipe 4; a main pesticide mixing mechanism is arranged at the joint of any one of the secondary landfill leachate inlet pipes 4 and the pretreatment tank 7; one side of any pretreatment tank 7 is connected with a flocculation tank 12 through a landfill leachate communicating pipe 9, an auxiliary pesticide mixing mechanism is arranged at the joint of the landfill leachate communicating pipe 9 and the flocculation tank 12, an auxiliary landfill leachate outlet pipe 17 is arranged at one side of the flocculation tank 12, which is far away from the landfill leachate communicating pipe 9, and the auxiliary landfill leachate outlet pipe 17 is communicated with a main landfill leachate outlet pipe 20; the flocculation tank 12 is provided with a stirring mechanism 14, a pH value detection mechanism 13, a dosing mechanism 15 and a flocculation filtering mechanism 16; a water inlet reversing valve 3 is arranged at the joint of the main landfill leachate inlet pipe 1 and the auxiliary landfill leachate inlet pipe 4; a water outlet reversing valve 18 is arranged at the joint of the main landfill leachate outlet pipe 20 and the auxiliary landfill leachate outlet pipe 17; the landfill leachate communicating pipe 9 is provided with a landfill leachate communicating valve 8.

The main medicine mixing mechanism comprises a main medicine liquid circular ring 21 arranged in the auxiliary garbage leachate inlet pipe 4, and a plurality of main medicine liquid holes 23 which are uniformly distributed are formed in the main medicine liquid circular ring 21; a main liquid medicine stirrer is arranged in the auxiliary garbage leachate inlet pipe 4, the stirring direction of the main liquid medicine stirrer is parallel to the cross section of the auxiliary garbage leachate inlet pipe 4, and the main liquid medicine stirrer is matched with the main liquid medicine circular ring 21; the main liquid medicine stirrer comprises a stirring paddle blade matched with the auxiliary garbage leachate inlet pipe 4, and a main stirring motor is arranged at the center of the stirring paddle blade. The main liquid medicine circular ring 21 is communicated with a plurality of main liquid medicine branch pipes 5 arranged outside the auxiliary garbage percolate inlet pipe 4, any main liquid medicine branch pipe 5 is communicated with a main liquid medicine main pipe 6, and a main liquid medicine control valve is arranged on the main liquid medicine main pipe 6. The auxiliary medicine mixing mechanism comprises an auxiliary medicine liquid ring 24 arranged in the landfill leachate communicating pipe 9, and a plurality of auxiliary medicine liquid holes 26 which are uniformly distributed are arranged in the auxiliary medicine liquid ring 24; an auxiliary liquid medicine stirrer is arranged in the landfill leachate communicating pipe 9, the stirring direction of the auxiliary liquid medicine stirrer is parallel to the cross section of the landfill leachate communicating pipe 9, and the auxiliary liquid medicine stirrer is matched with the auxiliary liquid medicine circular ring 24; the auxiliary liquid medicine stirrer comprises a stirring paddle matched with the landfill leachate communicating pipe 9, and an auxiliary stirring motor is arranged in the center of the stirring paddle; the auxiliary liquid medicine ring 24 is communicated with a plurality of auxiliary liquid medicine branch pipes 10 arranged outside the landfill leachate communicating pipe 9, any one of the auxiliary liquid medicine branch pipes 10 is communicated with an auxiliary liquid medicine main pipe 11, and an auxiliary liquid medicine control valve is arranged on the auxiliary liquid medicine main pipe 11. The main liquid medicine branch pipe 5 is axially symmetrical relative to the cross section of the secondary landfill leachate inlet pipe 4; the auxiliary liquid medicine branch pipe 10 is axially symmetrical relative to the cross section of the landfill leachate communicating pipe 9; the main liquid medicine circular ring 21 is attached to the inner side wall of the secondary landfill leachate inlet pipe 4; the auxiliary liquid medicine circular ring 24 is attached to the inner side wall of the landfill leachate communicating pipe 9. The main liquid medicine stirrer is arranged in the auxiliary garbage percolate inlet pipe 4 between the main liquid medicine circular ring 21 and the pretreatment tank 7; the auxiliary liquid medicine stirrer is arranged in the garbage percolate communicating pipe 9 between the auxiliary liquid medicine circular ring 24 and the flocculation tank 12.

The stirring mechanism 14 comprises a flocculation stirrer matched with the flocculation tank 12, and the flocculation stirrer is connected with a flocculation stirring motor arranged on the flocculation tank 12; the pH value detection mechanism 13 comprises a pH value sensor, and a pH value display is connected to the pH value sensor; the dosing mechanism 15 comprises a dosing port arranged on the flocculation tank 12, and a dosing sealing cover is arranged on the dosing port. The flocculation filtering mechanism 16 comprises a flocculation filter screen arranged at the joint of the flocculation tank 12 and the auxiliary outlet pipe 17 of the landfill leachate, a flocculation cleaning port matched with the flocculation filter screen is arranged on the auxiliary outlet pipe 17 of the landfill leachate, and a flocculation sealing cover is arranged on the flocculation cleaning port. The landfill leachate of this device mainly advances pipe 1 and is located the peak of this device, and the position of preliminary treatment case 7 is higher than the position of flocculation case 12, and intermediate equipment reduces the height in proper order, and landfill leachate owner exit tube 20 is located the minimum of this device, therefore this device can carry out flocculation filtration through the gravity of landfill leachate self to heavy metal ion, also can add equipment such as water pumper to carry out power auxiliary filtration operation.

When in use, the water inlet control valve 2 is opened, the garbage percolate starts to flow to the garbage percolate main inlet pipe 1, the garbage percolate flows to the garbage percolate auxiliary inlet pipe 4 on one side by reversing the water inlet reversing valve 3, the main medicine liquid control valve is opened, the liquid medicine of the heavy metal catching agent is enabled to supply the liquid medicine of the heavy metal catching agent to the main medicine mixing mechanism through the main medicine liquid main pipe 6 and the main medicine liquid branch pipe 5, the liquid medicine flows to the main medicine liquid ring 21 through the main medicine liquid nozzle 22, the main medicine liquid ring 21 is of a double-layer ring structure, the inner layer ring and the outer layer ring are in clearance fit and sealed connection, the inner layer ring is provided with a plurality of uniformly distributed main medicine liquid holes 23, the liquid medicine reaches the main medicine liquid holes 23 through the gap between the inner layer ring and the outer layer ring and then is mixed with the garbage percolate in the garbage percolate auxiliary inlet pipe 4, wherein the main medicine liquid branch pipe 5 is designed, the mixing proportion of the liquid medicine and the landfill leachate is met, and the proper range of the mixing proportion is ensured by using the same flow rate; the mixed liquid of the landfill leachate and the heavy metal catching agent reaches the position of a stirring paddle of a main liquid medicine stirrer, a stirring motor drives the stirring paddle to rotate, the mixed liquid is uniformly stirred, the uniformly stirred mixed liquid flows into a pretreatment tank 7, after a period of time, the pretreatment tank 7 is filled with the mixed liquid, a main liquid medicine mixing mechanism is closed, the landfill leachate of the mixed liquid medicine is reacted in the pretreatment tank 7, a water inlet reversing valve 3 is controlled to turn, the landfill leachate flows to a secondary landfill leachate inlet pipe 4 at the other side, the steps are repeated, the mixed liquid is filled into the pretreatment tank 7 at the other side, the landfill leachate of the mixed liquid medicine is reacted in the pretreatment tank 7, the mixed liquid in the pretreatment tank at one side is reacted, a landfill leachate communicating valve 8 at one side is opened, and the reacted mixed liquid flows to a flocculation tank 12 through a landfill leachate communicating pipe 9, opening an auxiliary liquid medicine control valve, enabling liquid medicine of a coagulant to flow to an auxiliary liquid medicine mixing mechanism through an auxiliary liquid medicine main pipe 11 and an auxiliary liquid medicine branch pipe 10, enabling the liquid medicine to flow to an auxiliary liquid medicine circular ring 24 through an auxiliary liquid medicine nozzle 25, enabling the auxiliary liquid medicine circular ring 24 to be of a double-layer circular structure, enabling an inner layer ring and an outer layer ring to be in clearance fit and sealed connection, enabling a plurality of auxiliary liquid medicine holes 26 to be uniformly distributed in the inner layer ring, enabling the liquid medicine to reach the auxiliary liquid medicine holes 26 through a gap between the inner layer ring and the outer layer ring and then to be mixed with mixed liquid in a garbage leachate communicating pipe 9, wherein the garbage leachate communicating pipe 9 is designed to be in a certain proportion with the auxiliary liquid medicine branch pipe 10, the mixed liquid medicine and the mixed liquid are in a proper range, and; the mixed liquid of the mixed liquid and the coagulant reaches the position of a stirring paddle of an auxiliary liquid medicine stirrer, a stirring motor drives the stirring paddle to rotate, the mixed liquid is uniformly stirred, the uniformly stirred mixed liquid flows into a flocculation tank 12, after a period of time, the flocculation tank 12 is filled with the mixed liquid, an auxiliary liquid medicine mixing mechanism and a garbage percolate communication valve 8 are closed, garbage percolate of the mixed coagulant is reacted in the flocculation tank 12, the garbage percolate communication valve 8 at the other side is opened, and a flocculating agent is added into the mixed liquid after the reaction at the other side in the steps; when the landfill leachate communicating valve 8 on the other side is opened, the pretreatment tank 7 on one side is in an empty state, and the landfill leachate liquid medicine adding operation can be carried out again; after a period of time, after the reaction of the flocculating agent of the flocculation tank 12 at one side is finished, adding a coagulant aid through a dosing port on the dosing mechanism 15, stirring the mixture by a flocculation stirring motor on the stirring mechanism 14, after a certain period of time of reaction, opening a water outlet control valve 19 on a main garbage leachate outlet pipe 20 and adjusting a water outlet reversing valve 18, so that the mixed solution after the reaction in the flocculation tank 12 at one side flows to the main garbage leachate outlet pipe 20 through an auxiliary garbage leachate outlet pipe 17, filtering the flocculated heavy metal ions by a flocculation filter screen on a flocculation filtering mechanism 16, and entering the next garbage leachate treatment procedure; the flocculation tank 12 on the other side is subjected to the filtration and flocculation treatment as described above. Wherein, the flocculation tank 12 and the pretreatment tank 7 are both provided with exhaust holes, which is convenient for the garbage percolate to flow into the two tanks.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, but rather as the following description is intended to cover all modifications, equivalents and improvements falling within the spirit and scope of the present invention.

Claims

1. A heavy metal ion precipitation device for landfill leachate is characterized by comprising a main landfill leachate inlet pipe, wherein a pair of auxiliary landfill leachate inlet pipes are connected to the main landfill leachate inlet pipe; a main pesticide mixing mechanism is arranged at the joint of any one of the secondary landfill leachate inlet pipes and the pretreatment tank; one side of any one 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; and a landfill leachate communicating valve is arranged on the landfill leachate communicating pipe.

2. The heavy metal ion precipitation device for landfill leachate according to claim 1, wherein the main drug mixing mechanism comprises a main drug solution ring disposed in the secondary inlet pipe of landfill leachate, the main drug solution ring is provided with a plurality of uniformly distributed main drug solution holes; a main liquid medicine stirrer is arranged in the auxiliary garbage leachate inlet pipe, the stirring direction of the main liquid medicine stirrer is parallel to the cross section of the auxiliary garbage leachate inlet pipe, and the main liquid medicine stirrer is matched with the main liquid medicine circular ring; the main liquid medicine stirrer comprises a stirring paddle blade matched with the auxiliary garbage leachate inlet pipe, and a main stirring motor is arranged at the center of the stirring paddle blade.

3. The heavy metal ion precipitation device for landfill leachate of claim 2, wherein the main chemical liquid ring is communicated with a plurality of main chemical liquid branch pipes disposed outside the secondary inlet pipe of landfill leachate, any one of the main chemical liquid branch pipes is communicated with a main chemical liquid main pipe, and a main chemical liquid control valve is disposed on the main chemical liquid main pipe.

4. The heavy metal ion precipitation device for landfill leachate according to claim 3, wherein the auxiliary pesticide mixing mechanism comprises an auxiliary pesticide liquid ring arranged in the landfill leachate communication pipe, and a plurality of uniformly distributed auxiliary pesticide liquid holes are arranged in the auxiliary pesticide liquid ring; an auxiliary liquid medicine stirrer is arranged in the landfill leachate communicating pipe, the stirring direction of the auxiliary liquid medicine stirrer is parallel to the cross section of the landfill leachate communicating pipe, and the auxiliary liquid medicine stirrer is matched with an auxiliary liquid medicine circular ring; the auxiliary liquid medicine stirrer comprises a stirring paddle matched with the landfill leachate communicating pipe, and an auxiliary stirring motor is arranged in the center of the stirring paddle; the auxiliary liquid medicine circular ring is communicated with a plurality of auxiliary liquid medicine branch pipes arranged outside the landfill leachate communicating pipe, any auxiliary liquid medicine branch pipe is communicated with an auxiliary liquid medicine main pipe, and an auxiliary liquid medicine control valve is arranged on the auxiliary liquid medicine main pipe.

5. The heavy metal ion precipitation device for landfill leachate according to claim 4, wherein the main liquid medicine branch pipe is axisymmetric with respect to the cross section of the landfill leachate secondary inlet pipe; the auxiliary liquid medicine branch pipes are axially symmetrical relative to the cross section of the landfill leachate communicating pipe; the main liquid medicine circular ring is attached to the inner side wall of the secondary landfill leachate inlet pipe; the auxiliary liquid medicine circular ring is attached to the inner side wall of the landfill leachate communicating pipe.

6. The heavy metal ion precipitation device for landfill leachate according to claim 5, wherein the main chemical liquid stirrer is arranged in the secondary landfill leachate inlet pipe between the main chemical liquid ring and the pretreatment tank; the auxiliary liquid medicine stirrer is arranged in the garbage percolate communicating pipe between the auxiliary liquid medicine circular 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 stirrer matched with the flocculation tank, and the flocculation stirrer is connected with a flocculation stirring motor arranged on the flocculation tank; the pH value detection mechanism comprises a pH value sensor, and a pH value display is connected to the pH value sensor; the dosing mechanism comprises a dosing port arranged on the flocculation box, and a dosing sealing cover is arranged on the dosing port.

8. The heavy metal ion precipitation device for landfill leachate of claim 7, wherein the flocculation filtering mechanism comprises a flocculation filter screen arranged at the joint of the flocculation tank and the secondary effluent pipe of landfill leachate, the secondary effluent pipe of landfill leachate is provided with a flocculation cleaning port matched with the flocculation filter screen, and the flocculation cleaning port is provided with a flocculation sealing cover.