CN210117330U

CN210117330U - Landfill leachate handles mummification device

Info

Publication number: CN210117330U
Application number: CN201920970299.1U
Authority: CN
Inventors: 张云月; 马强; 明勇; 常博
Original assignee: Sichuan Guangda Energy Conservation And Environmental Protection Investment Co Ltd
Current assignee: Sichuan nengtou energy conservation and Environmental Protection Investment Co.,Ltd.
Priority date: 2019-06-26
Filing date: 2019-06-26
Publication date: 2020-02-28
Anticipated expiration: 2029-06-26

Abstract

The utility model discloses a mummification device is handled to landfill leachate, including mummification box and heat exchanger, the mummification box is little negative pressure closed box, is equipped with the rubbish feed inlet at mummification box roof, and the bottom plate is equipped with the rubbish discharge gate, is equipped with rubbish conveyer in the mummification box between rubbish feed inlet and rubbish discharge gate, still is equipped with several gas nozzle on mummification box bottom plate, and gas nozzle passes through the intake pipe and links to each other with the heat exchanger, is equipped with the gas vent at mummification box roof, and the gas vent passes through the blast pipe and links to each other with the condenser, still is equipped with the landfill leachate shower nozzle on the roof, the. The device is high in efficiency and the treatment cost is obviously lower than that of the existing treatment process.

Description

Landfill leachate handles mummification device

Technical Field

The utility model relates to a refuse treatment field, concretely relates to mummification device is handled to landfill leachate.

Background

The domestic garbage can generate a high-concentration organic component liquid called as garbage leachate, also called leachate, due to the biochemical degradation effects of compaction, fermentation and the like in the stacking and landfill processes. The factors influencing the generation of the landfill leachate are many, the highest values of the concentrations of CODcr and BOD5 in the landfill leachate can reach thousands to tens of thousands, and compared with the urban sewage, the concentration is much higher, so the landfill leachate can not be directly discharged into an urban sewage treatment pipeline without strict treatment and purification.

At present, for a garbage disposal plant, a general treatment mode of garbage leachate generated by garbage fermentation is as follows: and (3) performing anaerobic fermentation and aerobic fermentation treatment on the landfill leachate in sequence, and then performing purification treatment on the landfill leachate through an ultrafiltration membrane, a nanofiltration membrane and a reverse osmosis membrane to finally obtain water with high purity. When the landfill leachate is treated by ultrafiltration, nanofiltration and reverse osmosis, a large amount of concentrated solution which cannot pass through the filter membrane is generated, the concentrated solution accounts for 40-60% of the weight of the landfill leachate, the concentrated solution rich in organic components is sprayed into an incineration hearth to be incinerated in the prior art, and the hearth needs to provide large amount of heat to evaporate water and then burn the organic components due to high water content of the concentrated solution, so that the thermal efficiency of a system is reduced, and the concentrated solution can cause serious corrosion to the hearth.

The treatment process of the landfill leachate is complicated, the efficiency is low, the energy consumption is high, and one ton of the landfill leachate needs about 60 ten thousand calories of heat to be incinerated, so that the treatment cost of the landfill leachate is high.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem, the utility model discloses a mummification device is handled to landfill leachate utilizes the device to handle filtration liquid not only efficient, and treatment cost is showing and is being less than current processing technology.

The utility model discloses a following technical scheme realizes:

the utility model provides a mummification device is handled to landfill leachate, includes mummification box and heat exchanger, and the mummification box is little negative pressure closed box, is equipped with the rubbish feed inlet at mummification box roof, and the bottom plate is equipped with the rubbish discharge gate, and the mummification incasement between rubbish feed inlet and rubbish discharge gate is equipped with rubbish conveyer, still is equipped with several gas nozzle on mummification box bottom plate, and gas nozzle passes through the intake pipe and links to each other with the heat exchanger, is equipped with the gas vent at mummification box roof, and the gas vent passes through the blast pipe and links to each other with the condenser, still is equipped with the landfill leachate.

In the utility model, garbage after fermentation, separation and crushing enters a garbage conveying device in a drying box body through a garbage feed port, the garbage leachate in a garbage leachate collecting box is sprayed on the garbage on the surface of the garbage conveying device from a garbage leachate spray head through a guide pipe, hot air generated by a heat exchanger enters a gas nozzle through an air inlet pipe and is sprayed out from the nozzle, the garbage is acted by the hot air in the conveying process, the moisture is gradually evaporated and is discharged from an exhaust port, and the dried garbage is discharged from a garbage discharge port, the drying device increases the contact surface between the leachate and the air by spraying the leachate on garbage particles, is favorable for the hot air to rapidly take away the moisture of the leachate, and the difficultly volatilized combustible components of the leachate are attached to the surfaces of the garbage particles, thereby increasing the heat value of the garbage, the utility model simplifies the treatment process of the garbage leachate, the treatment efficiency of the landfill leachate is improved, and the treatment cost of the landfill leachate is effectively reduced.

The garbage conveying device comprises a first conveying belt and a second conveying belt which are arranged from top to bottom, the first conveying belt and the second conveying belt are arranged horizontally, the left end of the first conveying belt is aligned with the left end of the second conveying belt, the first conveying belt is shorter than the second conveying belt in length, the garbage feeding port is arranged above the left side of the first conveying belt, and the garbage discharging port is arranged below the left end of the second conveying belt.

The garbage is conveyed from the left side to the right side of the first conveying belt, and the length of the first conveying belt is smaller than that of the second conveying belt, so that the garbage can fall from the right end of the first conveying belt to the right side of the second conveying belt, is conveyed to the left end of the second conveying belt, and is finally discharged from the garbage discharging port.

And meshes are arranged on the first conveying belt and the second conveying belt. The mesh can improve hot air and rubbish contact surface, improves mummification dewatering efficiency.

The guide pipe is provided with a booster pump, the garbage leachate sprayer is aligned to the upper surface of the left side of the first conveying belt, and the gas nozzle is aligned to the lower surface of the second conveying belt.

The conveying direction of the conveying belt is towards the left, the conveying direction of the second conveying belt is towards the right, and the plurality of gas nozzles are uniformly arranged below the second conveying belt.

The condenser is connected with a gas combustion device, and the gas combustion device is connected with a flue gas purification device.

The utility model discloses in, after the rubbish mummification dewatering on the rubbish conveyer, waste gas passes through the blast pipe and gets into the dewatering in the condenser, and gas after the dewatering is after gas combustion device burns, gets rid of volatile organic substance, improves its cleanliness factor.

The air inlet pipe is provided with a first fan, and the exhaust pipe is provided with a second fan.

The gas combustion device is a hexahedral metal box body, two horizontal plates are arranged in the metal box body from top to bottom, the left side of the horizontal plate on the lower side is fixed on the left side plate of the metal box body, the right side of the horizontal plate on the lower side has a first gap with the inner wall of the metal box body, the right side of the horizontal plate on the upper side is fixed on the side plate on the right side of the metal box body, the left side of the horizontal plate on the upper side has a second gap with the inner wall of the metal box body, the tail end of the exhaust pipe is inserted into the left side plate of the metal box body, the tail end of the exhaust pipe is arranged below the lower horizontal plate, the bottom of.

The ignition device is an electronic ignition device, the electronic ignition device is close to the exhaust pipe, and the pipeline is far away from the second gap.

The utility model discloses in, waste gas gets into the metal box body from the blast pipe end in, ignition makes the volatile organic compounds burning wherein, the flue gas after the burning flows from the clearance earlier on, enter into the metal box body top through clearance two again, discharge to reach standard after getting into the flue gas purification device from the pipeline at last and handle, the horizontal plate separates the metal box inner chamber for three horizontally runner, the flow time of flue gas in the metal box body has been prolonged, make its abundant burning, the flame that avoids the burning to produce gets into the pipeline, influence the life of pipeline.

A landfill leachate treatment method comprises the following steps:

A. spraying the garbage percolate on garbage subjected to fermentation, sorting and crushing treatment;

B. and drying and dewatering the garbage sprayed with the garbage leachate.

The garbage leachate is sprayed on garbage which is fermented, sorted and crushed, and then is dried to remove water, in the process, water in the garbage leachate is evaporated, organic ingredients in the garbage leachate are attached to the surface of the garbage, the garbage leachate enters the next treatment process along with the garbage, the garbage leachate does not need to undergo anaerobic fermentation and aerobic fermentation treatment, then the garbage leachate is purified by an ultrafiltration membrane, a nanofiltration membrane and a reverse osmosis membrane, concentrated liquid which needs to be incinerated by an incinerator cannot be generated, the garbage leachate treatment process is simplified, the garbage leachate treatment efficiency is improved, and the garbage leachate treatment cost is effectively reduced.

And in the step B, drying and dewatering the garbage are realized by hot air.

The hot air can improve the temperature of the garbage and promote the water evaporation, and on the other hand, the flowing of the air flow can further promote the rapid water evaporation and improve the garbage drying efficiency.

Further, in step a, the landfill leachate is produced by a primary landfill fermentation process.

The landfill leachate that produces native rubbish heap fermentation directly sprays on the rubbish through heap fermentation, sorting, crushing treatment, and the mummification dewatering not only is showing and is improving landfill leachate treatment efficiency, reduce cost, and whole landfill leachate treatment process need not to adopt unnecessary equipment, raw materials moreover, can also effectively improve the refuse derived fuel's of rubbish preparation calorific value, improves the efficiency of msw incineration electricity generation, brings economic benefits.

Furthermore, the processes of spraying garbage percolate and drying to remove water are realized in the percolate treatment and drying device.

Further, in the step B, the garbage is dried to remove water and then can be used as a raw material for preparing garbage derived fuel.

The drying and dewatering process not only effectively removes the water in the landfill leachate and improves the heat value of the landfill, but also thoroughly removes organic matters from the waste gas by burning, so that the landfill leachate is more thoroughly treated, and the environmental pollution is avoided.

In the step B, the hot air after the drying process contains a large amount of water and partial volatile substances, the exhaust gas is discharged and then enters a condenser to condense the water in the exhaust gas, the cold source adopts circulating cooling water, the condensed water enters a sewage treatment device to be treated and then is discharged after reaching the standard, the exhaust gas after condensation and water removal enters an exhaust gas combustion treatment device to be combusted, the volatile substances in the exhaust gas are removed, and the flue gas after combustion enters a flue gas purification device to be treated and then is discharged after reaching the standard.

Preferably, the hot air is obtained by heating cold air through a heat exchanger, the temperature of the hot air is 70-110 ℃ (can be set), and the heat exchanger is heated by an external heat source.

An application of a landfill leachate treatment method in preparation of refuse derived fuel.

The preparation method of the refuse derived fuel based on the landfill leachate treatment method comprises the following steps:

1) performing fermentation treatment on the screened primary garbage;

2) collecting landfill leachate generated in the process of stacking and fermenting, and removing impurities and sorting solid products after stacking and fermenting to select combustible parts;

3) crushing the sorted solid product;

4) spraying garbage percolate on the crushed garbage particles, and then drying to remove water;

5) preparing the garbage particles obtained in the step 4) into garbage derived fuel.

The landfill leachate generated by garbage fermentation is sprayed back to the garbage treated by the fermentation, so that the high-efficiency and low-cost treatment of the landfill leachate is realized, the heat value of the garbage derived fuel is effectively improved, the economic benefit is brought, the solid product and the landfill leachate are generated by the primary garbage fermentation, the solid product and the landfill leachate are mixed and dehumidified during drying, other byproducts or pollutants are not generated in the process, other substances or equipment is not required to be added for treatment, and the environment is saved and protected.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

the utility model relates to a garbage leachate treatment drying device, garbage after fermentation, separation and crushing enters a garbage conveying device in a drying box body through a garbage feed port, garbage leachate in a garbage leachate collecting box is sprayed on the garbage on the surface of the garbage conveying device from a garbage leachate sprayer through a guide pipe, hot air generated by a heat exchanger enters a gas nozzle through an air inlet pipe and is sprayed out from the gas nozzle, the garbage is acted by heated air in the conveying process, water is gradually evaporated and is discharged from an exhaust port, and the dried garbage is discharged from a garbage discharge port, the drying device increases the contact surface between the leachate and air by spraying the leachate on garbage particles, is favorable for the hot air to rapidly take away the water of the leachate, the difficultly volatilized combustible components of the leachate are attached to the surfaces of the garbage particles, the garbage heat value is increased, the utility model simplifies the garbage leachate treatment process, the treatment efficiency of the landfill leachate is improved, and the treatment cost of the landfill leachate is effectively reduced.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

FIG. 1 is a flow chart of the method for preparing the refuse derived fuel according to the present invention;

FIG. 2 is a schematic structural view of the drying apparatus of the present invention;

fig. 3 is a sectional view of the gas combustion apparatus of the present invention.

Reference numbers and corresponding part names in the drawings:

1-drying box, 11-top plate, 12-bottom plate, 13-gas nozzle, 14-gas inlet pipe, 15-fan I, 2-heat exchanger, 3-garbage inlet port, 4-garbage outlet port, 5-garbage conveying device, 51-conveyor belt I, 52-conveyor belt II, 6-garbage leachate sprayer, 61-guide pipe, 62-garbage leachate collecting box, 63-booster pump, 71-gas outlet pipe, 72-fan II, 8-gas combustion device, 81-horizontal plate, 82-side plate, 83-gap I, 84-gap II, 85-ignition device, 9-pipeline, 10-condenser, 101-flue gas purification device, 102-sewage treatment device.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

Example 1

As shown in fig. 1-3, the utility model relates to a mummification device is handled to landfill leachate, including mummification box 1 and heat exchanger 2, mummification box 1 is little negative pressure closed box, be equipped with rubbish feed inlet 3 at mummification box 1 roof 11, bottom plate 12 is equipped with rubbish discharge gate 4, be equipped with rubbish conveyer 5 in the mummification box between rubbish feed inlet 3 and rubbish discharge gate 4, still be equipped with several gas nozzle 13 on mummification box bottom plate 12, gas nozzle 13 links to each other with heat exchanger 2 through intake pipe 14, be equipped with the gas vent at mummification box roof 11, the gas vent passes through the blast pipe and links to each other with the condenser, still be equipped with landfill leachate shower nozzle 6 on roof 11, landfill leachate shower nozzle 6 passes through pipe 61 and is.

The garbage conveying device 5 comprises a first conveying belt 51 and a second conveying belt 52 which are arranged from top to bottom, the first conveying belt 51 and the second conveying belt 52 are arranged horizontally, the left end of the first conveying belt 51 is aligned with the left end of the second conveying belt 52, the first length of the first conveying belt is smaller than the second length of the second conveying belt, the garbage feeding hole 3 is arranged above the left side of the first conveying belt 51, and the garbage discharging hole 4 is arranged below the left end of the second conveying belt 52.

And meshes are arranged on the first conveyor belt 51 and the second conveyor belt 52.

The guide pipe 61 is provided with a booster pump 63, the landfill leachate spray head 6 is aligned to the upper surface of the left side of the first conveyor belt 51, and the gas nozzle 13 is aligned to the lower surface of the second conveyor belt 52.

The first conveyor belt 51 is conveyed leftwards, the second conveyor belt 52 is conveyed rightwards, and the plurality of gas nozzles 13 are uniformly arranged below the second conveyor belt.

The condenser 10 is connected to the gas combustion device 8, and the gas combustion device 8 is connected to a flue gas cleaning device 101.

Example 2

The air inlet pipe 14 is provided with a first fan 15, and the air outlet pipe 71 is provided with a second fan 72.

Gas combustion apparatus 8 is hexahedral metal box, and top-down is equipped with two horizontal plates 81 in the metal box, and the horizontal plate left side of downside is fixed on the left curb plate 82 of metal box, and downside horizontal plate right side and metal box inner wall have clearance one 83, and the horizontal plate 81 right side of upside is fixed on the curb plate 82 on metal box right side, and upside horizontal plate left side and metal box inner wall have clearance two 84, exhaust pipe 71 is terminal to be inserted from metal box left side board 82, and the exhaust pipe end sets up in downside horizontal plate below, and the metal box bottom sets up an ignition 85, and ignition 85 is close to

exhaust pipe

71, 9 tip of pipeline is inserted in the metal box from the metal box top, and clearance two is kept away from to pipeline 9.

The ignition device 85 is an electronic ignition device, the electronic ignition device is close to the exhaust pipe 71, and the pipeline 9 is far away from the second gap 84.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A garbage leachate treatment drying device is characterized by comprising a drying box body (1) and a heat exchanger (2), wherein the drying box body (1) is a micro-negative pressure closed box body, a garbage feeding hole (3) is arranged on a top plate (11) of the drying box body (1), a garbage discharging hole (4) is arranged on a bottom plate (12), a garbage conveying device (5) is arranged in the drying box body between the garbage feeding hole (3) and the garbage discharging hole (4), a plurality of gas nozzles (13) are also arranged on the bottom plate (12) of the drying box body, the gas nozzles (13) are connected with the heat exchanger (2) through a gas inlet pipe (14), a top plate (11) of the drying box body is provided with an exhaust port which is connected with a condenser (10) through an exhaust pipe, the top plate (11) is also provided with a garbage percolate spray head (6), the landfill leachate spray head (6) is connected with a landfill leachate collecting box (62) through a guide pipe (61).

2. The landfill leachate treatment drying device according to claim 1, wherein the landfill delivery device (5) comprises a first conveyor belt (51) and a second conveyor belt (52) which are arranged from top to bottom, the first conveyor belt (51) and the second conveyor belt (52) are both horizontally arranged, the left end of the first conveyor belt (51) is aligned with the left end of the second conveyor belt (52), the length of the first conveyor belt is smaller than that of the second conveyor belt, the landfill inlet (3) is arranged above the left side of the first conveyor belt (51), and the landfill outlet (4) is arranged below the left end of the second conveyor belt (52).

3. The landfill leachate treatment drying device according to claim 2, wherein the first conveyor belt (51) and the second conveyor belt (52) are provided with meshes.

4. The landfill leachate treatment drying device according to claim 2, wherein the conduit (61) is provided with a booster pump (63), the landfill leachate nozzle (6) is aligned with the upper surface of the left side of the first conveyor belt (51), and the gas nozzle (13) is aligned with the lower surface of the second conveyor belt (52).

5. The landfill leachate treatment drying device according to claim 2, wherein the first conveyor belt (51) is conveyed leftwards, the second conveyor belt (52) is conveyed rightwards, and the plurality of gas nozzles (13) are uniformly arranged below the second conveyor belt.

6. The landfill leachate treatment drying device according to claim 1, wherein the condenser (10) is connected to the gas combustion device (8), and the gas combustion device (8) is connected to a flue gas purification device (101).

7. The landfill leachate treatment drying device according to claim 1, wherein the air inlet pipe (14) is provided with a first fan (15), and the air outlet pipe (71) is provided with a second fan (72).

8. The landfill leachate treatment and drying device as claimed in claim 6, wherein the gas combustion device (8) is a hexahedral metal box, two horizontal plates (81) are arranged in the metal box from top to bottom, the left side of the lower horizontal plate is fixed on a side plate (82) on the left side of the metal box, a first gap (83) is formed between the right side of the lower horizontal plate and the inner wall of the metal box, the right side of the upper horizontal plate (81) is fixed on the side plate (82) on the right side of the metal box, a second gap (84) is formed between the left side of the upper horizontal plate and the inner wall of the metal box, the end of the exhaust pipe (71) is inserted from the left side plate (82) of the metal box, the end of the exhaust pipe is arranged below the lower horizontal plate, an ignition device (85) is arranged at the bottom of the metal box, the ignition device (85), the pipeline (9) is far away from the second gap.

9. The landfill leachate treatment drying device according to claim 8, wherein the ignition device (85) is an electronic ignition device, the electronic ignition device is close to the exhaust pipe (71), and the pipe (9) is far away from the second gap (84).