CN112939339B

CN112939339B - Landfill leachate treatment system and application method thereof

Info

Publication number: CN112939339B
Application number: CN202110113260.XA
Authority: CN
Inventors: 张亚文
Original assignee: Guangzhou Boyatao Ecological Technology Co ltd
Current assignee: Guangzhou Boyatao Ecological Technology Co ltd
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2021-11-02
Anticipated expiration: 2041-01-27
Also published as: CN112939339A

Abstract

The invention provides a landfill leachate treatment system and an application method thereof, wherein the landfill leachate treatment system comprises an upper layer area and a lower layer area, the upper layer area is provided with a dosing device, a coagulation reaction tank, a clean water tank, an air floatation device and an activated carbon filter, and the lower layer area is provided with a biochemical tank; the coagulation reaction tank extracts the garbage percolate through a liquid inlet pipe, a garbage percolate extraction pump is arranged on the liquid inlet pipe, the dosing device is communicated into the coagulation reaction tank, and the coagulation reaction tank is provided with a paddle type stirrer; the air floatation device is communicated with the coagulation reaction tank; the biochemical tank is communicated with the air floatation device; the biochemical pool is communicated with the activated carbon filter; the clean water tank is communicated with the activated carbon filter. In the invention, the pollution of the landfill leachate to the environment is reduced by treating the landfill leachate; meanwhile, the invention adopts a double-layer structure to integrate the garbage leachate treatment system together, thereby reducing the occupied area of the garbage leachate.

Description

Landfill leachate treatment system and application method thereof

Technical Field

The invention relates to the technical field of environmental protection, in particular to a landfill leachate treatment system and an application method thereof.

Background

Along with the continuous development of urbanization, garbage in cities is more and more, and in the process of stacking household garbage in cities, a large amount of landfill leachate can be generated, and the landfill leachate is high-concentration organic wastewater with complex components and has the typical characteristics of high pollution load and comprehensive pollution, and the environment can be seriously damaged due to large water quantity, deep chromaticity, complex water quality, high organic matter concentration, high ammonia nitrogen concentration and the like, so that a landfill leachate treatment system needs to be designed to treat the landfill leachate.

Disclosure of Invention

The invention aims to provide a landfill leachate treatment system.

The invention also aims to provide an application method applied to the landfill leachate treatment system.

In order to achieve the purpose, the invention provides the following technical scheme:

a landfill leachate treatment system comprises an upper layer area and a lower layer area, wherein the upper layer area is provided with a dosing device, a coagulation reaction tank, a clean water tank, an air floatation device and an activated carbon filter, and the lower layer area is provided with a biochemical tank.

Preferably, the coagulation reaction tank extracts the landfill leachate through a liquid inlet pipe, a landfill leachate extraction pump is arranged on the liquid inlet pipe, the dosing device is communicated to the coagulation reaction tank to be used for adding a medicament into the coagulation reaction tank, and the coagulation reaction tank is provided with a paddle type stirrer to be used for fully mixing the medicament in the coagulation reaction tank and the landfill leachate;

the air floatation device is communicated with the coagulation reaction tank, a mud scraper is arranged on the air floatation device to scrape floating slag on the upper part, and a sand discharge valve is arranged at the lower part of the air floatation device;

the biochemical tank is communicated with the air floatation device and is used for receiving the garbage percolate flowing out of the air floatation device and treating organic matters in the garbage percolate through microorganisms;

the biochemical tank is communicated with the activated carbon filter, and the activated carbon filter is used for receiving and purifying the wastewater treated by the biochemical tank;

the clean water tank is communicated with the activated carbon filter to receive the clean water purified by the activated carbon filter.

Preferably, the coagulation reaction tank is provided with two paddle type stirring machines.

Preferably, the landfill leachate treatment system further comprises a mixing valve, the dosing device and the liquid inlet pipe are correspondingly communicated with two water inlets of the mixing valve, and a water outlet of the mixing valve is communicated to the coagulation reaction tank.

Preferably, the landfill leachate treatment system further comprises an ejector and an ozone generator, the water outlet of the mixing valve is communicated with the water inlet of the ejector, the ozone generator is communicated with the air inlet of the ejector, and the water spray port of the ejector is communicated to the coagulation reaction tank.

Preferably, the landfill leachate treatment system further comprises a pipeline heat transfer device for heating the biochemical tank, wherein the pipeline heat transfer device comprises a heat pump unit, a water pumping pipe, a water return pipe, a hot water tank, a circulating water pump, a circulating water outlet pipe, a circulating water inlet pipe and a hot water pipe network; the heat pump unit, the water pumping pipe, the water return pipe, the circulating water outlet pipe, the circulating water inlet pipe and the hot water tank are all arranged outside the biochemical pool, and the hot water pipe network is arranged in the biochemical pool;

the heat pump unit is used for pumping underground water through the water pumping pipe and sending the pumped underground water back to the ground bottom through the water return pipe;

a first water flowing pipe and a second water flowing pipe are communicated between the hot water tank and the heat pump unit, the circulating water pump is arranged on the first water flowing pipe, and medium water stored in the hot water tank flows into the heat pump unit through the circulating water pump to absorb heat energy of underground water and flows back into the hot water tank through the second water flowing pipe;

the circulating water pump is arranged on the circulating water outlet pipe, one end of the circulating water outlet pipe is communicated to the inside of the hot water tank, the other end of the circulating water outlet pipe extends into the biochemical pool, one end of the circulating water inlet pipe is communicated to the inside of the hot water tank, the other end of the circulating water inlet pipe extends into the biochemical pool, the hot water pipe network is arranged along the length direction of the biochemical pool, and the two ends of the hot water pipe network along the length direction are correspondingly communicated with the circulating water outlet pipe and the circulating water inlet pipe.

Preferably, one end of the circulating water outlet pipe, which is far away from the hot water tank, is communicated with two water outlet branch pipes, the two water outlet branch pipes are correspondingly arranged at the upper part and the lower part of the biochemical pool, one end of the circulating water inlet pipe, which is far away from the hot water tank, is communicated with two water inlet branch pipes, the two water inlet branch pipes are correspondingly arranged at the upper part and the lower part of the biochemical pool, and the two water outlet branch pipes and the two water inlet branch pipes are in one-to-one correspondence; the two hot water pipe networks are correspondingly arranged at the upper part and the lower part of the biochemical pool, and the two ends of the hot water pipe networks are correspondingly communicated with the water outlet branch pipe and the water inlet branch pipe.

Preferably, the hot water pipe network comprises a plurality of heat transfer water pipes, the heat transfer water pipes are arranged along the width direction of the biochemical pool, two ends of each heat transfer water pipe are correspondingly communicated to the water outlet branch pipe and the water inlet branch pipe, and the heat transfer water pipes are fixedly connected with the water outlet branch pipe and the water inlet branch pipe through flanges.

Preferably, the biochemical tank comprises a reaction zone for microbial reaction, a clarification zone for performing solid-liquid separation on the sewage after reaction, a microporous aeration system arranged at the bottom of the reaction zone and an intermediate tank, wherein the reaction zone is communicated with the air floatation device, the intermediate tank is communicated with the upper part of the clarification zone, and the intermediate tank is communicated with the activated carbon filter;

the reaction zone comprises a first reaction zone and a second reaction zone, a partition plate is arranged in the middle of the reaction zone and is arranged in the length direction of the reaction zone so as to divide the reaction zone into the first reaction zone and the second reaction zone in the width direction of the reaction zone, and circulating channels are formed between two ends of the partition plate in the length direction and two opposite side walls of the reaction zone so as to correspondingly communicate two ends of the first reaction zone in the length direction with two ends of the second reaction zone in the length direction;

submersible water impellers are arranged in the first reaction zone and the second reaction zone, the submersible water impellers of the first reaction zone and the second reaction zone are correspondingly arranged at two ends of the first reaction zone along the length direction, and the submersible water impellers of the first reaction zone and the second reaction zone face the middle part of the first reaction zone and the second reaction zone;

the reaction area and the clarification area are separated by a baffle, a water passing channel is formed between the lower part of the baffle and the bottom of the reaction area, a movable sealing plate is arranged at the baffle and can move along the height direction relative to the baffle, and the movable sealing plate can be used for sealing the water passing channel;

a filtering filler is arranged in the clarification zone to filter the sewage in the reaction zone;

the intermediate tank is used for receiving the sewage filtered by the clarification zone.

Preferably, landfill leachate processing system still includes hoist mechanism, hoist mechanism is including locating the reaction zone upper portion promote the support with connect in promote chain block on the support, be equipped with the direction connecting rod along vertical direction in the reaction zone, dive impeller connect in the direction connecting rod, and dive impeller accessible chain block is followed the vertical direction of direction connecting rod removes.

As a second aspect, the present invention further relates to an application method of a landfill leachate treatment system, which is applied to the landfill leachate treatment system, and comprises the following steps:

(1) the coagulation reaction tank sucks the garbage leachate through a liquid inlet pipe, adds a medicament through a dosing device, and then mixes the garbage leachate with the medicament through a paddle type stirrer;

(2) the air flotation device receives the garbage percolate stirred by the coagulation reaction tank, lifts the floc of the garbage percolate to the water surface, and then scrapes the floc by a mud scraper;

(3) the biochemical tank receives the garbage percolate flowing out of the air floatation device, and microorganisms are added to degrade organic matters in the garbage percolate;

(4) the activated carbon filter is used for receiving and purifying the wastewater treated by the biochemical tank;

(5) the clean water tank is used for receiving and storing the clean water purified by the activated carbon filter.

Compared with the prior art, the scheme of the invention has the following advantages:

in the invention, the coagulation reaction tank extracts the garbage percolate through a liquid inlet pipe and a garbage percolate extraction pump, adds a medicament into the garbage percolate through a medicament adding device, then stirs and mixes the garbage percolate through a paddle stirrer, then circulates the garbage percolate mixed with the medicament into the air floatation device so as to float flocs generated in the garbage percolate to the liquid surface through bubbles to form scum, and scrapes the scum through a mud scraper, a sand discharge valve is arranged at the lower part of the air floatation device so as to discharge silt in the garbage percolate, then the biochemical tank is used for receiving the garbage percolate subjected to preliminary treatment in the air floatation device and adding microorganisms into the biochemical tank to degrade organic matters in the garbage percolate, wastewater degraded by the biochemical tank flows into the active carbon filter to be purified so as to finally circulate clear water filtered by the active carbon filter into the clear water tank, the treatment work of the landfill leachate is completed so as to reduce the pollution of the landfill leachate to the environment; meanwhile, the invention adopts a double-layer structure to integrate the landfill leachate treatment system together, thereby reducing the floor area of the landfill leachate.

Drawings

The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic view of the structure of a biochemical tank according to the present invention;

FIG. 3 is a schematic view of the structure of a reaction zone in the present invention;

FIG. 4 is a schematic structural view of a middle lift mechanism according to the present invention;

FIG. 5 is a side view of a biochemical cell according to the present invention;

FIG. 6 is a schematic view of the compression bracket of the present invention;

FIG. 7 is a schematic diagram of a tubular heat transfer device according to the present invention;

FIG. 8 is a side view of a schematic of the construction of the tubular heat transfer device of the present invention;

fig. 9 is a schematic view of the internal structure of the hot water tank according to the present invention.

Reference numerals: 1. a coagulation reaction tank; 11. a liquid inlet pipe; 12. a landfill leachate extraction pump; 13. a dosing device; 14. a paddle mixer; 15. a mixing valve; 16. an ejector; 17. an ozone generator; 2. a clean water tank; 3. an air floatation device; 4. an activated carbon filter; 5. a biochemical pool; 51. a reaction zone; 511. a first reaction zone; 512. a second reaction zone; 513. a partition plate; 514. a submersible water impeller; 52. a clarification zone; 521. filtering the filler; 522. a guide surface; 523. a solid accommodating groove; 524. a cover plate; 53. a baffle plate; 54. moving the closing plate; 55. a lifting mechanism; 551. lifting the support; 552. a chain block; 553. a guide connecting rod; 56. a solid guide plate; 57. an intermediate tank; 58. a compression mechanism; 581. a compression cylinder; 582. compressing the stent; 583. compressing the cross bar; 584. compressing the vertical rod; 6. a pipe heat transfer device; 61. a heat pump unit; 62. a water pumping pipe; 63. a water return pipe; 64. a hot water tank; 641. a first draft tube; 642. a second flow pipe; 643. a cold water chamber; 644. a mixing chamber; 645. a hot water chamber; 646. a communicating pipe; 65. a water circulating pump; 66. circulating a water outlet pipe; 67. circulating a water inlet pipe; 68. a hot water pipe network; 681. a heat transfer water pipe; 69. a connecting member; 7. film forming and filling; 8. a heat collecting plate; 9. a heat conducting rod.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative only and should not be construed as limiting the invention.

It will be understood by those within the art that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the term "and/or" includes all or any element and all combinations of one or more of the associated listed items.

As shown in fig. 1 and 2, the invention relates to a landfill leachate treatment system, which comprises an upper layer area and a lower layer area, wherein the upper layer area is provided with a dosing device 13, a coagulation reaction tank 1, a clean water tank 2, an air flotation device 3 and an activated carbon filter 4, and the lower layer area is provided with a biochemical tank 5;

the coagulation reaction tank 1 is used for extracting the garbage leachate through a liquid inlet pipe 11, a garbage leachate extraction pump 12 is arranged on the liquid inlet pipe 11, the dosing device 13 is communicated into the coagulation reaction tank 1 to be used for adding a medicament into the coagulation reaction tank 1, and the coagulation reaction tank 1 is provided with a paddle type stirrer 14 to be used for fully mixing the medicament in the coagulation reaction tank 1 and the garbage leachate.

The air floatation device 3 is communicated with the coagulation reaction tank 1, a mud scraper is arranged on the air floatation device 3 to scrape floating slag on the upper part, and a sand discharge valve is arranged at the lower part of the air floatation device 3;

the biochemical tank 5 is communicated with the air floatation device 3, and the biochemical tank 5 is used for receiving the garbage percolate flowing out of the air floatation device 3 and treating organic matters in the garbage percolate by microorganisms;

the biochemical tank 5 is communicated with the activated carbon filter 4, and the activated carbon filter 4 is used for receiving and purifying the wastewater treated by the biochemical tank 5;

the clean water tank 2 is communicated with the activated carbon filter 4 to receive the clean water purified by the activated carbon filter 4.

In the invention, the coagulation reaction tank 1 extracts the garbage percolate through a liquid inlet pipe 11 and a garbage percolate extraction pump 12, adds a medicament into the garbage percolate through a medicament adding device 13, then stirs and mixes the garbage percolate through a paddle stirrer 14, then circulates the garbage percolate mixed with the medicament into the air floating device 3 so as to float flocs generated in the garbage percolate to the liquid surface through bubbles to form scum, and scrapes the scum through a mud scraper, a sand discharge valve is arranged at the lower part of the air floating device 3 for discharging silt in the garbage percolate, then the biochemical tank 5 is used for receiving the garbage percolate subjected to primary treatment in the air floating device 3 and adding microorganisms into the biochemical tank 5 to degrade organic matters in the garbage percolate, and wastewater degraded by the biochemical tank 5 flows into the activated carbon filter 4 to be purified, finally, the clean water filtered by the activated carbon filter 4 is circulated into the clean water tank 2, so that the treatment work of the landfill leachate is completed, and the pollution of the landfill leachate to the environment is reduced; meanwhile, the invention adopts a double-layer structure to integrate the landfill leachate treatment system together, thereby reducing the floor area of the landfill leachate.

In this embodiment, the coagulation reaction tank 1 is provided with two paddle type mixers 14, so that the mixing efficiency between the landfill leachate and the chemical in the coagulation reaction tank 1 is enhanced through the action of the two paddle type mixers 14, the efficiency of the landfill leachate treatment system for treating the landfill leachate is improved, and the sufficient mixing of the chemical and the landfill leachate can be ensured.

The landfill leachate treatment system further comprises a mixing valve 15, the chemical adding device 13 and the liquid inlet pipe 11 are correspondingly communicated to two water inlets of the mixing valve 15, and a water outlet of the mixing valve 15 is communicated to the coagulation reaction tank 1.

Through the arrangement of the mixing valve 15, before the landfill leachate enters the coagulation reaction tank 1, the landfill leachate is mixed with a medicament, so that the treatment efficiency of the landfill leachate treatment system is improved; in addition, the mixing valve 15 can adjust the mixing ratio of the landfill leachate and the medicament, so as to conveniently adjust the mixing ratio of the landfill leachate and the medicament according to specific needs, facilitate the application of the landfill leachate treatment system and improve the working efficiency of the landfill leachate treatment system.

Preferably, the landfill leachate treatment system further comprises an ejector 16 and an ozone generator 17, the water outlet of the mixing valve 15 is communicated with the water inlet of the ejector 16, the ozone generator 17 is communicated with the air inlet of the ejector 16, and the water spray port of the ejector 16 is communicated into the coagulation reaction tank 1.

Through the ejector 16 with the setting of ozone generator 17, and then mix the mixed liquid mixing ozone of landfill leachate and medicament and spray to in the coagulation reaction tank 1 to be favorable to improving the efficiency that medicament and landfill leachate mix, and remixing ozone carries out disinfection treatment to landfill leachate, improve landfill leachate processing system purifies the efficiency and the quality of landfill leachate.

The invention also relates to an application method of the landfill leachate treatment system, which is applied to the landfill leachate treatment system and comprises the following steps:

(1) the coagulation reaction tank 1 sucks the garbage leachate through a liquid inlet pipe 11, adds a medicament through a medicament adding device 13, and then mixes the garbage leachate with the medicament through a paddle type stirrer 14;

(2) the air flotation device 3 receives the garbage percolate stirred by the coagulation reaction tank 1, lifts flocs of the garbage percolate to the water surface, and then scrapes the flocs by a mud scraper;

(3) the biochemical tank 5 receives the landfill leachate flowing out of the air floatation device 3, and microorganisms are added to degrade organic matters in the landfill leachate;

(4) the activated carbon filter 4 is used for receiving and purifying the wastewater treated by the biochemical tank 5;

(5) the clean water tank 2 is used for receiving and storing clean water purified by the activated carbon filter 4.

In the application method of the landfill leachate treatment system, the coagulation reaction tank 1, the air flotation device 3, the biochemical tank 5 and the activated carbon filter 4 are used for purifying the landfill leachate, so that the damage of the landfill leachate to the environment is reduced.

Referring to fig. 3 to 6, in the present invention, the biochemical tank 5 includes a reaction zone 51 for microbial reaction, a clarification zone 52 for solid-liquid separation of the sewage after reaction, a microporous aeration system disposed at the bottom of the reaction zone 51, and an intermediate tank 57; the reaction zone 51 comprises a first reaction zone 511 and a second reaction zone 512, a partition 513 is arranged in the middle of the reaction zone 51, the partition 513 is arranged along the length direction of the reaction zone 51 to divide the reaction zone 51 into the first reaction zone 511 and the second reaction zone 512 along the width direction of the reaction zone 51, and two ends of the partition 513 along the length direction are correspondingly communicated with two opposite side walls of the reaction zone 51 to form a circulation channel therebetween, so that two ends of the first reaction zone 511 along the length direction are correspondingly communicated with two ends of the second reaction zone 512 along the length direction;

submersible water impellers 514 are arranged in the first reaction zone 511 and the second reaction zone 512, the submersible water impellers 514 of the first reaction zone 511 and the submersible water impellers 514 of the second reaction zone 512 are correspondingly arranged at two ends of the reaction zone 51 along the length direction, and the submersible water impellers 514 of the first reaction zone 511 and the second reaction zone 512 face the middle part of the reaction zone 51;

the reaction area 51 and the clarification area 52 are separated by a baffle 53, a water passing channel is formed between the lower part of the baffle 53 and the bottom of the reaction area 51, a movable closing plate 54 is arranged at the baffle 53, the movable closing plate 54 can move in the height direction relative to the baffle 53, and the movable closing plate 54 can be used for closing the water passing channel;

a filtering filler 521 is arranged in the clarification zone 52 to filter the sewage in the reaction zone 51; the intermediate tank 57 is communicated with the upper part of the clarification zone 52 to receive the wastewater filtered by the clarification zone 52, and the intermediate tank 57 is communicated with the activated carbon filter 4.

In the invention, the first reaction zone 511 and the second reaction zone 512 enable a mixed solution obtained by mixing the landfill leachate and the microorganisms to circulate between the first reaction zone 511 and the second reaction zone 512 under the action of the submersible flow impeller 514, so that on one hand, the landfill leachate and the microorganisms are fully mixed, on the other hand, oxygen generated by the microporous aeration system can be uniformly mixed in the landfill leachate, oxygen is provided for the microorganisms, and the degradation efficiency of the microorganisms on organic matters in the landfill leachate is further improved; the biochemical tank 5 further comprises a clarification area 52, wherein a filtering filler 521 is arranged in the clarification area 52 and is used for filtering the garbage percolate so as to improve the treatment quality of the garbage percolate, the garbage percolate in the reaction area 51 enters the clarification area 52 through the lower part of the clarification area 52 and is combined with the effect of the filtering filler 521 so as to improve the filtering efficiency of the garbage percolate, and meanwhile, the filtering filler 521 can be prevented from being blocked by solid matters in the garbage percolate so as to influence the normal work of the biochemical tank 5.

The biochemical pool 5 further comprises a lifting mechanism 55, the lifting mechanism 55 comprises a lifting bracket 551 arranged at the upper part of the reaction area 51 and a chain block 552 connected to the lifting bracket 551, a guide connecting rod 553 is arranged in the reaction area 51 along the vertical direction, the submersible water impeller 514 is connected to the guide connecting rod 553, and the submersible water impeller 514 can move along the vertical direction of the guide connecting rod 553 through the chain block 552.

Through hoist mechanism 55's effect, and then can play control dive impeller 514 sets up the height, and then can be according to the liquid level in the reaction zone 51, reasonable control dive impeller 514's height, in order to improve biochemical pond 5's practicality.

The side of the bottom of the clarification zone 52 away from the reaction zone 51 is provided with a guide surface 522 for guiding the solid matter filtered by the filter packing 521 to the reaction zone 51.

Through the setting of the guide surface 522, solid matters filtered by the filter filler 521 can be guided to the reaction area 51, so that the solid matters are prevented from being accumulated at the lower part of the clarification area 52, the influence on the garbage percolate in the reaction area 51 entering the clarification area 52 is avoided, and the normal work of the biochemical pool 5 is ensured.

Preferably, the baffle 53 is provided with a solids guiding plate 56 at the lower part, the lower part of the solids guiding plate 56 is inclined towards the guiding surface 522, and the landfill leachate in the reaction zone 51 passes between the solids guiding plate 56 and the guiding surface 522; after the solid matter is guided to the guide surface 522 by the fixed guide plate, the influence on the garbage percolate entering the clarification area 52 can be avoided when the solid matter is guided to the reaction area 51 by the guide surface 522, and the normal work of the biochemical pool 5 is ensured.

In this embodiment, the bottom of the clarification zone 52 and the lower end of the guide surface 522 are provided with a solid accommodating groove 523; through the arrangement of the fixed accommodating groove, solid impurities filtered out by the filter filler 521 are guided to the solid accommodating groove 523 through the guide surface 522, so that the solid substances are prevented from being accumulated in the water passage and influencing the garbage leachate to enter the clarification area 52.

Preferably, the upper portion of the solid containing groove 523 is open, and a cover plate 524 is covered on an area of the upper portion of the solid containing groove 523, which is close to the reaction area 51; the solid substance is stopped by the cover 524 to be carried out by the water flow, so that the solid substance can be accumulated in the solid accommodating groove 523 and the subsequent cleaning is facilitated.

Further, a compression mechanism 58 for compressing the solid substance in the solid containing tank 523 to the lower side of the cover plate 524 is disposed in the solid containing tank 523. The compressing mechanism 58 comprises a compressing cylinder 581 and a compressing bracket 582, the compressing cylinder 581 is arranged inside the inner side wall of the solid containing groove 523 far away from the cover plate 524, the compressing bracket 582 is arranged in the solid containing groove 523, and the compressing bracket 582 is fixedly connected with an expansion link of the compressing cylinder 581 so as to drive the compressing bracket 582 to move along the width direction of the solid containing groove 523.

The compression cylinder 581 drives the compression bracket 582 to compress the solid substance below the cover 524, so as to prevent the solid substance from falling into the solid accommodating groove 523 from the guide surface 522, and at the same time, the solid accommodating groove 523 can accommodate more solid substances.

Furthermore, the compression mechanisms 58 are provided with two compression mechanisms, the compression mechanisms are correspondingly arranged on the upper portion and the lower portion of the solid accommodating groove 523, the compression support 582 comprises a compression cross rod 583 and a compression vertical rod 584, the compression cross rod 583 is provided with a plurality of compression vertical rods 584 along the length direction, the two compression mechanisms 58 are arranged in a manner that the compression support 582 is opposite to each other, and the compression vertical rods 584 of the compression support 582 are arranged in a staggered manner.

The vertical compression rods 584 of the compression brackets 582 are staggered, so that the two compression brackets 582 can pass through each other without mutual interference, after the solid substance is compressed to the side of the solid receiving groove 523 by one of the compression brackets 582, after the guide surface 522 continues to guide the solid substance to fall into the solid containing groove 523, the other compressing bracket 582 compresses the newly fallen solid substance to the side surface of the solid containing groove 523, then, the compression bracket 582, which is compressed in one step, is returned to wait for a new solid substance to fall into the solid receiving tank 523, therefore, through the alternate cooperation of the two compression brackets 582 to laminate the impurity layer of landfill leachate at the side wall of the solid containing groove 523, the number of impurities contained in the solid containing groove 523 is increased, the smooth work of the biochemical pond 5 is ensured, and the influence of the impurities filtered by the filter filler 521 on the working efficiency of the biochemical pond 5 can be reduced.

In the invention, the application method of the biochemical pool comprises the following steps:

(1) discharging the landfill leachate into the reaction zone 51 and adding microorganisms;

(2) the garbage percolate circulates in the first reaction area 511 and the second reaction area 512 through a submersible water impeller 514 and is matched with the microporous aeration system to decompose organic matters in the garbage percolate by microorganisms;

(3) the decomposed landfill leachate is discharged from the bottom of the reaction zone 51 to a clarification zone 52, and solid-liquid separation is carried out through a filtering filler 521 in the clarification zone 52.

In the invention, the biochemical tank 5 is arranged to improve the degradation efficiency of microorganisms on organic matters in the landfill leachate, and meanwhile, the treatment efficiency and quality of the landfill leachate are improved through the filtration of the clarification area 52.

Referring to fig. 7 to 9, in the present invention, the landfill leachate treatment system further includes a pipe heat transfer device 6 for transferring the heat energy of the groundwater to the biochemical pond 5 containing the microorganisms, wherein the pipe heat transfer device 6 includes a heat pump unit 61, a water pumping pipe 62, a water returning pipe 63, a hot water tank 64, a circulating water pump 65, a circulating water outlet pipe 66, a circulating water inlet pipe 67 and a hot water pipe network 68; the heat pump unit 61, the water pumping pipe 62, the water return pipe 63, the circulating water outlet pipe 66, the circulating water inlet pipe 67 and the hot water tank 64 are all arranged outside the biochemical pool 5, and the hot water pipe network 68 is arranged in the biochemical pool 5;

the heat pump unit 61 is used for pumping the underground water through the water pumping pipe 62 and sending the pumped underground water back to the ground bottom through the water return pipe 63;

a first flowing water pipe 641 and a second flowing water pipe 642 are communicated between the hot water tank 64 and the heat pump unit 61, the circulating water pump 65 is arranged on the first flowing water pipe 641, and medium water stored in the hot water tank 64 flows into the heat pump unit 61 through the circulating water pump 65 to absorb heat energy of underground water and flows back into the hot water tank 64 through the second flowing water pipe 642;

the circulating water pump 65 is arranged on the circulating water outlet pipe 66, one end of the circulating water outlet pipe 66 is communicated with the hot water tank 64, the other end of the circulating water outlet pipe 66 extends into the reaction area 51 of the biochemical pool 5, one end of the circulating water inlet pipe 67 is communicated with the hot water tank 64, the other end of the circulating water inlet pipe extends into the reaction area 51 of the biochemical pool 5, the hot water pipe network 68 is arranged along the length direction of the reaction area 51 of the biochemical pool 5, and two ends of the hot water pipe network 68 along the length direction are correspondingly communicated with the circulating water outlet pipe 66 and the circulating water inlet pipe 67.

In the invention, the heat of the underground water is transferred to the medium water in the hot water tank 64 by the heat pump unit 61, and then the medium water flows into the hot water pipe network 68 to transfer the heat of the medium water into the landfill leachate in the biochemical pond 5 so as to improve the temperature of the landfill leachate, thereby being beneficial to improving the efficiency of degrading organic matters by microorganisms and improving the treatment efficiency and quality of the landfill leachate treated by the biochemical pond 5; in addition, a large amount of heat can be obtained through a small amount of electric energy, and the effect of saving cost can be achieved.

One end of the circulating water outlet pipe 66, which is far away from the hot water tank 64, is communicated with two water outlet branch pipes, the two water outlet branch pipes are correspondingly arranged at the upper part and the lower part of the reaction area 51 of the biochemical pool 5, one end of the circulating water inlet pipe 67, which is far away from the hot water tank 64, is communicated with two water inlet branch pipes, the two water inlet branch pipes are correspondingly arranged at the upper part and the lower part of the reaction area 51 of the biochemical pool 5, and the two water outlet branch pipes and the two water inlet branch pipes are in one-to-one correspondence; the number of the hot water pipe networks 68 is two, the two hot water pipe networks 68 are correspondingly arranged at the upper part and the lower part of the reaction area 51 of the biochemical pool 5, and two ends of the hot water pipe networks 68 are correspondingly communicated with the water outlet branch pipe and the water inlet branch pipe, that is, the hot water pipe networks 68 are arranged in the reaction area 51 to heat the landfill leachate in the reaction area 51.

The upper part and the lower part of the reaction area 51 are respectively provided with the hot water pipe network 68 to heat the landfill leachate at the upper part and the lower part of the reaction area 51, so that the heat in the reaction area 51 is more uniform, and the landfill leachate circulates between the first reaction area 511 and the second reaction area 512 under the action of the submersible water impeller 514 in the reaction area 51, so that the heat in the reaction area 51 is more uniform, and the degradation efficiency of microorganisms in the reaction area 51 is improved.

Preferably, the hot water pipe network 68 includes a plurality of heat transfer water pipes 681, the plurality of heat transfer water pipes 681 are arranged along the width direction of the biochemical pool 5, that is, the plurality of heat transfer water pipes 681 are arranged along the width direction of the reaction zone 51, two ends of the heat transfer water pipes 681 are correspondingly connected to the water outlet branch pipe and the water inlet branch pipe, and the heat transfer water pipes 681 are fixedly connected to the water outlet branch pipe and the water inlet branch pipe by flanges.

The arrangement of the plurality of heat transfer water pipes 681 is advantageous for improving the efficiency of heat transfer to the reaction zone 51, and the heat transfer water pipes 681 are connected to the water outlet branch pipe and the water inlet branch pipe by flanges, so that the heat transfer water pipes 681 are detachably connected to the water outlet branch pipe and the water inlet branch pipe, thereby facilitating use.

Further, the plurality of heat transfer water pipes 681 positioned at the upper portion of the biochemical pool 5 and the plurality of heat transfer water pipes 681 positioned at the lower portion of the biochemical pool 5 are arranged in a one-to-one correspondence manner, that is, the plurality of heat transfer water pipes 681 positioned at the upper portion of the reaction region 51 and the plurality of heat transfer water pipes 681 positioned at the lower portion of the reaction region 51 are arranged in a one-to-one correspondence manner, a connection member 69 is connected between the two corresponding heat transfer water pipes 681, and a plurality of biofilm carriers 7 for microorganisms in the biochemical pool 5 to inhabit are uniformly distributed along the height direction of the connection member 69.

Through the action of the biofilm culturing filler 7, the biofilm culturing filler provides an environment for microorganisms to inhabit, so that the degradation efficiency of the microorganisms on the landfill leachate is improved, meanwhile, the landfill leachate in the reaction area 51 circulates between the first reaction area 511 and the second reaction area 512, so that gas generated by the microporous aeration system is cut into tiny bubbles by the biofilm culturing filler 7 and is uniformly filled in the reaction area 51, the contact area between air and the landfill leachate is increased, and the microorganism reaction efficiency is improved.

Furthermore, a plurality of connecting members 69 are uniformly distributed along the heat transfer water pipe 681 to increase the inhabitation space of the microorganisms and improve the degradation efficiency of the landfill leachate by the microorganisms.

Still further, the connecting member 69 is an aluminum alloy rod, and the upper and lower ends of the aluminum alloy rod are correspondingly fixed between the two heat transfer water pipes 681.

The connecting piece 69 is an aluminum alloy rod, so that the heat of the heat transfer water pipe 681 can be transferred to the middle part of the reaction zone 51 in the height direction, the uniformity of the heat in the reaction zone 51 can be further improved, and the efficiency of transferring the medium water to the heat in the reaction zone 51 can be improved; meanwhile, the film-forming filler 7 is arranged on the aluminum alloy rod so as to further optimize the inhabitation environment of microorganisms and greatly improve the efficiency of degrading the landfill leachate by the microorganisms.

The pipe heat transfer device 6 further comprises a control module, a cold water chamber 643, a mixing chamber 644 and a hot water chamber 645 which are independent from each other are arranged inside the hot water tank 64, heat insulation members are filled among the cold water chamber 643, the mixing chamber 644 and the hot water chamber 645, temperature sensors are arranged in the cold water chamber 643, the mixing chamber 644 and the hot water chamber 645, the cold water chamber 643 and the hot water chamber 645 are both located above the mixing chamber 644, a communication pipe 646 communicated to the mixing chamber 644 is arranged at the lower parts of the cold water chamber 643 and the hot water chamber 645, the cold water chamber 643 and the hot water chamber 645 are communicated through the communication pipe 646, switch valves are arranged on the communication pipe 646, and the switch valves and the temperature sensors are both electrically connected with the control module;

both ends of the first flowing water pipe 641 and the second flowing water pipe 642 are correspondingly communicated to the inside of the hot water chamber 645 and the inside of the heat pump unit 61, the circulating water outlet pipe 66 is communicated with the mixing chamber 644 in the hot water tank 64, and the circulating water inlet pipe 67 is communicated with the cold water chamber 643.

The hot water tank 64 is internally provided with a cold water chamber 643, a mixing chamber 644 and a hot water chamber 645, medium water in the hot water chamber 645 can flow into the heat pump unit 61 through a first water flow pipe 641 and a circulating water pump 65, heat is absorbed and then flows back into the hot water chamber 645, the cold water chamber 643 is used for receiving the medium water which flows into the heat transfer water pipe 681 and is completely transferred, and the mixing chamber 644 is used for mixing the medium water in the cold water chamber 643 and the hot water chamber 645, so that the temperature in the mixing chamber 644 can be adaptively adjusted according to the requirement of microorganisms on the temperature, and the degradation efficiency of the microorganisms is improved.

Preferably, water level sensors are disposed in the cold water chamber 643, the hot water chamber 645 and the mixing chamber 644, and are electrically connected to the control module, so as to monitor the water levels in the cold water chamber 643, the hot water chamber 645 and the mixing chamber 644, and ensure the normal operation of the pipe heat transfer device 6.

Further, the pipe heat transfer device 6 further includes a heat collecting plate 8 and a heat conducting rod 9 for absorbing solar energy, the heat collecting plate 8 is disposed on the top of the hot water tank 64, one end of the heat conducting rod 9 is connected to the heat collecting plate 8, and the other end thereof extends into the hot water chamber 645 of the hot water tank 64.

The heat collecting plate 8 is arranged at the top of the hot water tank 64, and the heat is transferred into the hot water chamber 645 through the heat conducting rod 9, so that the medium water in the hot water chamber 645 is heated, the utilization rate of solar energy is improved, and the cost is saved.

In the invention, the application method of the pipe heat transfer device comprises the following steps:

(1) the heat pump unit 61 pumps the underground water through the water pumping pipe 62, absorbs heat energy of the underground water, and the underground water after heat absorption is returned to the ground bottom through the water return pipe 63;

(2) the hot water tank 64 transfers medium water in the hot water tank to the heat pump unit 61 through the circulating water pump 65, absorbs heat energy stored in the heat pump unit 61, and then flows back to the hot water tank 64;

(3) the medium water in the hot water tank 64 passes through the circulating water pump 65 and is transmitted to the hot water pipe network 68 along the circulating water outlet pipe 66, so that the heat of the medium water is transmitted to the biochemical pool 5 through the hot water pipe network 68, and then the medium water flows back to the hot water tank 64 through the circulating water inlet pipe 67.

In the invention, the heat pump unit 61 absorbs the heat of the underground water to increase the temperature in the reaction zone 51, so as to increase the reaction rate of the microorganisms and improve the treatment efficiency of the landfill leachate, and meanwhile, a large amount of heat energy is obtained by utilizing a small amount of electric energy, thereby being beneficial to saving the cost.

The foregoing is only a partial embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and decorations can be made without departing from the principle of the present invention, and these modifications and decorations should also be regarded as the protection scope of the present invention.

Claims

1. The utility model provides a landfill leachate processing system which characterized by: the device comprises an upper layer area and a lower layer area, wherein the upper layer area is provided with a dosing device (13), a coagulation reaction tank (1), a clean water tank (2), an air floatation device (3) and an activated carbon filter (4), and the lower layer area is provided with a biochemical tank (5);

the system comprises a coagulation reaction tank (1), a liquid inlet pipe (11) and a dosing device (13), wherein the coagulation reaction tank (1) is used for pumping garbage leachate, the liquid inlet pipe (11) is provided with a garbage leachate pumping pump (12), the dosing device (13) is communicated into the coagulation reaction tank (1) and is used for adding a medicament into the coagulation reaction tank (1), and the coagulation reaction tank (1) is provided with a paddle type stirrer (14) for fully mixing the medicament in the coagulation reaction tank (1) and the garbage leachate;

the air floatation device (3) is communicated with the coagulation reaction tank (1), a mud scraper is arranged on the air floatation device (3) to scrape floating slag on the upper part, and a sand discharge valve is arranged at the lower part of the air floatation device (3);

the biochemical tank (5) is communicated with the air floatation device (3), and the biochemical tank (5) is used for receiving the garbage percolate flowing out of the air floatation device (3) and treating organic matters in the garbage percolate through microorganisms;

the biochemical tank (5) is communicated with the activated carbon filter (4), and the activated carbon filter (4) is used for receiving and purifying the wastewater treated by the biochemical tank (5);

the clean water tank (2) is communicated with the activated carbon filter (4) to receive clean water purified by the activated carbon filter (4);

the coagulation reaction tank (1) is provided with two paddle type mixers (14);

the device is characterized by further comprising a mixing valve (15), the dosing device (13) and the liquid inlet pipe (11) are correspondingly communicated with two water inlets of the mixing valve (15), and a water outlet of the mixing valve (15) is communicated into the coagulation reaction tank (1);

the device also comprises an ejector (16) and an ozone generator (17), wherein the water outlet of the mixing valve (15) is communicated with the water inlet of the ejector (16), the ozone generator (17) is communicated with the air inlet of the ejector (16), and the water spray port of the ejector (16) is communicated into the coagulation reaction tank (1);

the biochemical tank (5) comprises a reaction area (51) for microbial reaction, a clarification area (52) for carrying out solid-liquid separation on the sewage after reaction, a microporous aeration system arranged at the bottom of the reaction area (51) and an intermediate tank (57), wherein the reaction area (51) is communicated with the air flotation device (3), the intermediate tank (57) is communicated with the upper part of the clarification area (52), and the intermediate tank (57) is communicated with the activated carbon filter (4);

the reaction zone (51) comprises a first reaction zone (511) and a second reaction zone (512), a partition plate (513) is arranged in the middle of the reaction zone (51), the partition plate (513) is arranged along the length direction of the reaction zone (51) to divide the reaction zone (51) into the first reaction zone (511) and the second reaction zone (512) along the width direction of the reaction zone (51), and circulation channels are formed between two opposite side walls of the reaction zone (51) and corresponding two ends of the first reaction zone (511) along the length direction and two ends of the second reaction zone (512) along the length direction;

submersible water impellers (514) are arranged in the first reaction area (511) and the second reaction area (512), the submersible water impellers (514) of the first reaction area (511) and the submersible water impellers (514) of the second reaction area (512) are correspondingly arranged at two ends of the reaction area (51) along the length direction, and the submersible water impellers (514) of the first reaction area (511) and the second reaction area (512) face the middle part of the reaction area (51);

the reaction area (51) and the clarification area (52) are separated by a baffle (53), a water passing channel is formed between the lower part of the baffle (53) and the bottom of the reaction area (51), a movable closing plate (54) is arranged at the baffle (53), the movable closing plate (54) can move along the height direction relative to the baffle (53), and the movable closing plate (54) can be used for closing the water passing channel;

a filtering filler (521) is arranged in the clarifying zone (52) to filter the sewage in the reaction zone (51);

the intermediate tank (57) is used for receiving the sewage filtered by the clarification zone (52);

a guide surface (522) for guiding solid matters filtered by the filter filler (521) to the reaction zone (51) is arranged at the bottom of the clarification zone (52) and on the side far away from the reaction zone (51), a solid guide plate (56) is arranged at the lower part of the baffle plate (53), and the lower part of the solid guide plate (56) inclines towards the guide surface (522);

a solid containing groove (523) is formed in the bottom of the clarifying area (52) and located at the lower end of the guide surface (522), the upper portion of the solid containing groove (523) is open, and a cover plate (524) is covered on an area, close to the reaction area (51), of the upper portion of the solid containing groove (523);

a compression mechanism (58) used for compressing the solid substances in the solid containing groove (523) to the position below the cover plate (524) is arranged in the solid containing groove (523), the compression mechanism (58) comprises a compression cylinder (581) and a compression bracket (582), the compression cylinder (581) is arranged in the inner side wall of the solid containing groove (523) far away from one side of the cover plate (524), the compression bracket (582) is arranged in the solid containing groove (523), and the compression bracket (582) is fixedly connected with an expansion link of the compression cylinder (581) so as to drive the compression bracket (582) to move along the width direction of the solid containing groove (523);

compressing mechanism (58) are equipped with two, and correspond and locate the upper portion and the lower part of solid storage tank (523), compression support (582) is including compression horizontal pole (583) and compression montant (584), compression horizontal pole (583) are equipped with a plurality ofly along its length direction compression montant (584), two compressing mechanism (58) two compression support (582) sets up relatively, and two compression montant (584) of compression support (582) is crisscross to be set up.

2. The landfill leachate treatment system of claim 1, wherein: the biochemical pool heating device is characterized by further comprising a pipeline heat transfer device (6) used for heating the biochemical pool (5), wherein the pipeline heat transfer device (6) comprises a heat pump unit (61), a water pumping pipe (62), a water return pipe (63), a hot water tank (64), a circulating water pump (65), a circulating water outlet pipe (66), a circulating water inlet pipe (67) and a hot water pipe network (68); the heat pump unit (61), the water pumping pipe (62), the water return pipe (63), the circulating water outlet pipe (66), the circulating water inlet pipe (67) and the hot water tank (64) are all arranged outside the biochemical pool (5), and the hot water pipe network (68) is arranged in the biochemical pool (5);

the heat pump unit (61) is used for pumping underground water through the water pumping pipe (62) and sending the pumped underground water back to the ground bottom through the water return pipe (63);

a first flow pipe (641) and a second flow pipe (642) are communicated between the hot water tank (64) and the heat pump unit (61), the circulating water pump (65) is arranged on the first flow pipe (641), medium water stored in the hot water tank (64) flows into the heat pump unit (61) through the circulating water pump (65) to absorb heat energy of underground water, and flows back into the hot water tank (64) through the second flow pipe (642);

the circulating water pump (65) is arranged on the circulating water outlet pipe (66), one end of the circulating water outlet pipe (66) is communicated to the hot water tank (64), the other end of the circulating water outlet pipe extends into the biochemical pool (5), one end of the circulating water inlet pipe (67) is communicated to the hot water tank (64), the other end of the circulating water outlet pipe extends into the biochemical pool (5), the hot water pipe network (68) is arranged along the length direction of the biochemical pool (5), and two ends of the hot water pipe network (68) along the length direction are correspondingly communicated with the circulating water outlet pipe (66) and the circulating water inlet pipe (67).

3. The landfill leachate treatment system of claim 2, wherein: one end of the circulating water outlet pipe (66) far away from the hot water tank (64) is communicated with two water outlet branch pipes which are correspondingly arranged at the upper part and the lower part of the biochemical pool (5), one end of the circulating water inlet pipe (67) far away from the hot water tank (64) is communicated with two water inlet branch pipes which are correspondingly arranged at the upper part and the lower part of the biochemical pool (5), and the two water outlet branch pipes and the two water inlet branch pipes are in one-to-one correspondence; the number of the hot water pipe networks (68) is two, the two hot water pipe networks (68) are correspondingly arranged at the upper part and the lower part of the biochemical pool (5), and the two ends of the hot water pipe networks (68) are correspondingly communicated with the water outlet branch pipe and the water inlet branch pipe.

4. The landfill leachate treatment system of claim 3, wherein: the hot water pipe network (68) comprises a plurality of heat transfer water pipes (681), the heat transfer water pipes (681) are arranged along the width direction of the biochemical pool (5), two ends of each heat transfer water pipe (681) are correspondingly communicated to the water outlet branch pipe and the water inlet branch pipe, and the heat transfer water pipes (681) are fixedly connected with the water outlet branch pipe and the water inlet branch pipe through flanges.

5. The landfill leachate treatment system of claim 1, wherein: the device is characterized by further comprising a lifting mechanism (55), wherein the lifting mechanism (55) comprises a lifting support (551) arranged on the upper part of the reaction zone (51) and a chain block (552) connected to the lifting support (551), a guide connecting rod (553) is arranged in the reaction zone (51) along the vertical direction, the submersible water impeller (514) is connected to the guide connecting rod (553), and the submersible water impeller (514) can move along the vertical direction of the guide connecting rod (553) through the chain block (552).

6. An application method of a landfill leachate treatment system is characterized in that: the landfill leachate treatment system of any one of claims 1-5, comprising the steps of:

(1) the coagulation reaction tank (1) sucks the garbage percolate through a liquid inlet pipe (11), adds a medicament through a medicament adding device (13), and then mixes the garbage percolate and the medicament through a paddle type stirrer (14);

(2) the air flotation device (3) receives the garbage percolate stirred by the coagulation reaction tank (1), lifts the floc of the garbage percolate to the water surface, and then scrapes the floc by a mud scraper;

(3) the biochemical tank (5) receives the landfill leachate flowing out of the air floatation device (3), and microorganisms are added to degrade organic matters in the landfill leachate;

(4) the activated carbon filter (4) is used for receiving and purifying the wastewater treated by the biochemical tank (5);

(5) the clean water tank (2) is used for receiving and storing the clean water purified by the activated carbon filter (4).