CN111068506A

CN111068506A - Landfill leachate equalizing basin deodorization system

Info

Publication number: CN111068506A
Application number: CN201911377948.8A
Authority: CN
Inventors: 田黎黎; 周俊; 蔡斌; 高新; 肖宇轩
Original assignee: Hunan Junxin Environmental Co ltd
Current assignee: Hunan Junxin Environmental Co ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2020-04-28

Abstract

The invention discloses a garbage leachate adjusting tank deodorization system which comprises a water inlet pipeline, an adjusting tank sealing device, an odor collecting device, a water-gas separator, an air pump, an adsorption degradation device, a torch combustion device and an MBR biochemical device, wherein the water inlet pipeline, the adjusting tank sealing device, the odor collecting device, the water-gas separator and the air pump are sequentially communicated, the adsorption degradation device comprises a treatment tank and a biological filler layer, the air pump is communicated with the treatment tank, the biological filler layer is arranged in the treatment tank and used for adsorbing gas pumped by the air pump, the MBR biochemical device comprises a biochemical tank and an active sludge conveying pipe, the active sludge conveying pipe is communicated with the treatment tank and used for spraying active sludge in the biochemical tank to the biological filler layer, the treatment tank is connected with the biochemical tank through a sludge discharge pipe, and the treatment tank is connected with the torch combustion device through. The invention effectively solves the problem of odor pollution generated by the landfill leachate, and has the advantages of good deodorization effect, high activated sludge degradation effect, low operation cost and simple operation.

Description

Landfill leachate equalizing basin deodorization system

Technical Field

The invention relates to a landfill leachate treatment system, in particular to a deodorization system of a landfill leachate regulating tank.

Background

At present, the landfill leachate generated in the domestic garbage landfill process is temporarily stored mainly in a mode of building a closed high-capacity underground adjusting tank and then is treated in a centralized mode, so that the effect of uniformly allocating water quality is achieved on one hand, and an anaerobic environment is provided for anaerobic fermentation of the landfill leachate on the other hand. However, odor control in the conditioning tank has been a difficult problem to solve.

The odor of the regulating reservoir is mainly a metabolite produced by the anaerobic fermentation of microorganisms, and can be divided into the following chemical compositions: 1) a sulfur-containing compound: such as hydrogen sulfide, sulfur dioxide, mercaptans, thioethers, and the like; 2) nitrogen-containing compounds: such as ammonia nitrogen, amines, amides, etc.; 3) halogen and derivatives: such as chlorine, chlorinated hydrocarbons, etc.; 4) hydrocarbons: such as methane, alkenes, alkynes, and the like; 5) oxygen-containing compound: such as alcohols, phenols, organic acids, and the like. Analyzing and detecting odor in the regulating reservoir, wherein the content of organic matters is 10-60%, the concentration of hydrogen sulfide is 20-40 ppm, the content of ammonia is about 50mg/m3, and the concentration of odor is about 1000.

The conventional method for treating the odor mainly comprises ⑴ chemical methods such as acid washing, alkali washing, combustion, catalytic oxidation and the like, ⑵ physical methods such as filler adsorption, ⑶ biological methods such as an activated sludge method, wherein a certain degree of deodorization effect exists in the methods, but the methods also have many defects, such as the acid washing, alkali washing method cannot completely remove volatile organic odor molecules, the treatment cost is high, the acid-base wastewater after absorption needs to be treated independently, the combustion method needs to add a large amount of auxiliary fuel, the energy consumption is high, the tail gas needs to be treated again, the adsorption of the fillers and the like needs to consume a large amount of adsorbents, the adsorption capacity is limited, the treatment cost is high, the catalytic oxidation method needs to use a catalyst, the technology is complex, the reaction process is difficult to control, the treatment cost is high, the bacterial flora is easy to fall off, the deodorization effect is poor, the effect is difficult to effectively degrade the organic odor, the operation is complex, the microbial agent needs to be additionally added, the use cost is high, and the treatment cost is high.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a deodorization system of a landfill leachate regulating tank, which effectively solves the problem of odor pollution generated by landfill leachate, and has the advantages of good deodorization effect, high activated sludge degradation effect, low operation cost and simple operation.

In order to solve the technical problems, the invention adopts the following technical scheme:

a garbage leachate equalizing basin deodorization system comprises a water inlet pipeline, an equalizing basin closing device, an odor collecting device, a water-gas separator, an air pump, an adsorption degradation device, a torch combustion device and an MBR biochemical device, wherein the water inlet pipeline, the equalizing basin closing device, the odor collecting device, the water-gas separator and the air pump are sequentially communicated, the adsorption degradation device comprises a treatment basin and a biological packing layer, the air pump is communicated with the treatment basin, the biological packing layer is arranged in the treatment basin and used for adsorbing gas pumped by the air pump, the MBR biochemical device comprises a biochemical basin and an active sludge conveying pipe, the active sludge conveying pipe is communicated with the treatment basin and used for spraying active sludge in the biochemical basin to the biological packing layer, the treatment basin is connected with the biochemical basin through a sludge discharge pipe, and is connected with the torch combustion device through a discharge pipe, the flare combustion device is used for burning the gas discharged from the treatment tank.

As a further improvement of the above technical solution:

the adsorption and degradation device further comprises a plastic packing layer, an isolation plate is arranged between the plastic packing layer and the biological packing layer, and gas entering the treatment tank sequentially passes through the plastic packing layer and the biological packing layer.

The deodorization system further comprises a spraying device, the spraying device comprises a reclaimed water tank, a spraying pipe and a first spray head arranged on the spraying pipe, the spraying pipe is connected with the reclaimed water tank, the first spray head is arranged in the treatment tank and positioned above the plastic packing layer, the air suction pump is connected with the treatment tank through an air inlet pipe, and the air inlet pipe is arranged above the plastic packing layer and connected with the connection point of the treatment tank.

The spraying device also comprises a cleaning pipe, a second spray head is arranged on the cleaning pipe, the cleaning pipe is connected with the reclaimed water tank, and the second spray head is arranged in the treatment tank and is positioned above the biological packing layer; the activated sludge conveying pipe is connected with the second spray head, and a sludge spray pump and a sludge spray regulating valve are arranged on the activated sludge conveying pipe; and a reclaimed water spray pump is arranged between the reclaimed water pool and the spray pipe and between the reclaimed water pool and the cleaning pipe, and a first reclaimed water valve and a second reclaimed water valve are arranged on the spray pipe and the cleaning pipe.

The methane detector is arranged on the exhaust pipe, the exhaust pipe is divided into a first exhaust pipe and a second exhaust pipe, the first exhaust pipe is connected with the torch combustion device, the second exhaust pipe is communicated with the atmosphere, and a first exhaust valve and a second exhaust valve are arranged on the first exhaust pipe and the second exhaust pipe respectively.

The biological packing layer comprises biological packing and a plurality of layers of sludge supporting plates, wherein in the two adjacent layers of sludge supporting plates, one layer of sludge supporting plate is fixed on the isolating plate, the other layer of sludge supporting plate is fixed on the wall of the treatment tank, a certain gap is formed between the sludge supporting plate fixed on the isolating plate and the wall of the treatment tank, a certain gap is formed between the sludge supporting plate fixed on the wall of the treatment tank and the isolating plate, the path of the activated sludge on the multilayer sludge supporting plate is S-shaped, the biological packing is arranged on each layer of sludge supporting plate, the activated sludge is wrapped outside the biological packing, a plurality of first air holes are arranged on the sludge supporting plate, and the aperture of each first air hole is smaller than the particle size of the activated sludge and the particle.

The plastic packing layer comprises a plastic packing and a supporting plate, two ends of the supporting plate are respectively fixed on the wall of the treatment tank and the isolation plate, the supporting plate is provided with a plurality of second air holes, and the aperture of each second air hole is smaller than the particle size of the plastic packing.

The regulating reservoir sealing device comprises a regulating reservoir and a geomembrane, wherein the geomembrane covers the regulating reservoir, and the geomembrane extends to the ground on the periphery of the regulating reservoir and is fixed; the face in the geomembrane orientation equalizing basin is equipped with a plurality of floating covers, floating cover includes the sponge by the geomembrane and constitutes, weld between the geomembrane of floating cover and the geomembrane that covers the equalizing basin.

The odor collecting device also comprises an odor collecting main pipe and a plurality of air inlet branch pipes, wherein one end of each air inlet branch pipe penetrates through the geomembrane to be communicated with the regulating tank, the other end of each air inlet branch pipe is connected with the air inlet end of the odor collecting main pipe, and the air outlet end of the odor collecting main pipe is connected with the water-gas separator; the air inlet branch pipe is divided into an upper section and a lower section, the upper section is located above the geomembrane, the upper section is a PR pipe, the lower section is located below the geomembrane, the outer wall of the lower section is provided with a plurality of air inlets, and the bottom of the pipe is sealed by a blind plate.

The pipeline control valve capable of controlling the opening degree of the pipeline is arranged between the outlet end of the odor collecting main pipe and the water-gas separator, the backflow pipe is arranged between the outlet end of the odor collecting main pipe and the pipeline control valve and connected with the regulating tank, and the backflow pipe is provided with a drainage valve.

Compared with the prior art, the invention has the advantages that:

the deodorization system of the landfill leachate regulating reservoir comprises a regulating reservoir sealing system, an odor collecting system and a biological filler adsorption-activated sludge degradation system, wherein an external air draft system is started to discharge odor in the regulating reservoir into the biological filler adsorption-activated sludge degradation system through an odor collecting pipeline, and harmful substances are degraded and adsorbed through biological filler adsorption and activated sludge, so that clean gas is discharged into the atmosphere, and odor treatment is realized.

Drawings

Fig. 1 is a schematic structural view of the present invention.

FIG. 2 is a schematic structural view of a bio-filler layer in the present invention.

FIG. 3 is a schematic view showing the structure of the sludge supporting plate of the bio-filler layer in the present invention.

FIG. 4 is a schematic view of the structure of the plastic packing layer in the present invention.

FIG. 5 is a schematic view showing the structure of a support plate of the plastic packing layer in the present invention.

Fig. 6 is a schematic view showing the structure of the odor collecting device of the present invention.

Fig. 7 is a schematic view showing the structure of an intake manifold of the odor collecting device of the present invention.

FIG. 8 is a schematic view of the structure of the closed apparatus of the conditioning tank of the present invention.

The reference numerals in the figures denote:

1. a water inlet pipe; 2. a regulating reservoir sealing device; 21. a regulating tank; 22. a geomembrane; 23. a floating cover; 3. an odor collection device; 31. a main odor collecting pipe; 32. an intake branch pipe; 321. an upper section; 322. a lower section; 323. an air inlet; 324. a blind plate; 33. a pipeline control valve; 34. a return pipe; 35. a drain valve; 4. a water-gas separator; 41. a first pressure gauge; 42. a second pressure gauge; 5. an air pump; 51. an air inlet pipe; 6. an adsorption degradation device; 61. a treatment tank; 62. a biological filler layer; 621. biological fillers; 622. a sludge support plate; 623. a first air vent; 63. a plastic packing layer; 631. plastic fillers; 632. a support plate; 633. a second air hole; 64. a separator plate; 65. a sludge discharge pipe; 651. a sludge discharge pump; 66. an exhaust pipe; 661. a first exhaust pipe; 662. a second exhaust pipe; 663. a first exhaust valve; 664. a second exhaust valve; 7. a flare combustion device; 71. a methane detector; 8. MBR biochemical devices; 81. a biochemical pool; 82. an activated sludge conveying pipe; 83. activated sludge; 84. a sludge spray pump; 85. a sludge spraying regulating valve; 86. an outlet of the biochemical tank; 9. a spraying device; 91. a middle water pool; 92. a shower pipe; 921. a first nozzle; 922. a first reclaimed water valve; 93. cleaning the tube; 931. a second nozzle; 932. a second reclaimed water valve; 94. a reclaimed water spray pump; 95 a water supply pipe.

Detailed Description

The invention is described in further detail below with reference to the figures and specific examples of the specification.

As shown in fig. 1 to 8, the landfill leachate control tank deodorization system of the present embodiment includes a water inlet pipe 1, a control tank sealing device 2, an odor collecting device 3, a water-gas separator 4, an air pump 5, an adsorption degradation device 6, a torch combustion device 7 and an MBR biochemical device 8, wherein the water inlet pipe 1, the control tank sealing device 2, the odor collecting device 3, the water-gas separator 4 and the air pump 5 are sequentially communicated, the adsorption degradation device 6 includes a treatment tank 61 and a bio-filler layer 62, the air pump 5 is communicated with the treatment tank 61, and is pumped into the treatment tank 61 through air pumping. The bio-packing layer 62 is arranged in the treatment tank 61 and is used for adsorbing the gas pumped into by the air pump 5, the MBR biochemical device 8 comprises a biochemical tank 81 and an activated sludge conveying pipe 82, the activated sludge conveying pipe 82 is communicated with the treatment tank 61 and is used for spraying the activated sludge 83 in the biochemical tank 81 to the bio-packing layer 62, the activated sludge 83 is attached to the bio-packing layer 62, the two adsorbs and degrades the odor, the treatment tank 61 is connected with the biochemical tank 81 through the sludge discharge pipe 65, and the degraded sludge is discharged to the biochemical tank 81. The treatment tank 61 is connected to a flare combustion device 7 through an exhaust pipe 66, and the flare combustion device 7 burns gas discharged from the treatment tank 61.

The odor generation and deodorization process flow comprises the following steps: landfill leachate produced by a landfill site is collected into a leachate regulating reservoir sealing system 2 through a water inlet pipeline 1 of special leachate, the landfill leachate generates anaerobic fermentation reaction in a regulating reservoir 21 of the regulating reservoir sealing system 2, anaerobic microorganisms convert macromolecular organic matters into micromolecular organic matters and convert organic nitrogen into ammonia nitrogen, and microbial metabolites such as methane, hydrogen sulfide, ammonia and other odors are released. Along with the increase of the concentration of odor such as methane, hydrogen sulfide, ammonia and the like, the odor exceeds the saturated concentration of the water solution and further emerges out of the water surface, the odor gas is pumped out of the adjusting tank 21 through the air pump 5, the odor gas passes through the odor collecting system 3 and reaches the steam-water separator 4 to be subjected to steam-water separation, the separated gas enters the adsorption and degradation device 6, the separated liquid returns to the adjusting tank 21, the gas which is adsorbed by the biological filler layer 62 of the adsorption and degradation device 6 and subjected to degradation treatment of the active sludge 83 on the biological filler layer enters the torch combustion device 7 to be combusted, the sludge treated at the bottom of the treating tank 61 enters the MBR biochemical device 8 through the sludge discharge pipe 65, and the sludge is treated by the MBR biochemical device 8 to become the active sludge 83 and is continuously.

The activated sludge refers to the sludge attached to the surface of the biological filler layer 62, and the sludge control parameters are as follows: the temperature is 32-38 ℃, the pH is 6.5-8.5, the water content of the sludge is 98-99.5%, the sludge concentration is 15-22 g/L, and the renewal period is 3-7 d.

The MBR biochemical device 8 is a common device in a landfill leachate treatment system, and the MBR is a membrane bioreactor, a water treatment technology combining activated sludge and a membrane separation technology. The MBR biochemical unit 8 may produce activated sludge. Activated sludge is carried by an MBR system of a percolate treatment plant, so that dead sludge can be replaced in time, the sludge activity efficiency is high, and the treatment cost is low.

Adopt this deodorization system can effectively solve the problem that the foul smell that landfill leachate anaerobic microorganisms fermented in the equalizing basin produced pollutes atmosphere, and not only the deodorization effect is excellent, reaches the purpose of administering the foul smell, still has advantages such as operation maintenance cost is low, the energy consumption is low, easy operation concurrently simultaneously.

In this embodiment, the methane detector 71 is provided on the exhaust pipe 66, the exhaust pipe 66 is divided into a first exhaust pipe 661 and a second exhaust pipe 662, the first exhaust pipe 661 is connected to the flare combustion device 7, the second exhaust pipe 662 is communicated with the atmosphere, and the first exhaust pipe 661 and the second exhaust pipe 662 are provided with a first exhaust valve 663 and a second exhaust valve 664, respectively. When the detected methane concentration is not lower than 15%, the second exhaust valve 664 is closed, the first exhaust valve 663 is opened, and tail gas enters the flare combustion device 7; when the detected methane concentration is lower than 15%, the second exhaust valve 664 is opened, the first exhaust valve 6632 is closed, and the tail gas reaches the standard and is discharged into the atmosphere.

In this embodiment, the adsorption and degradation device 6 further includes a plastic packing layer 63, an isolation plate 64 is disposed between the plastic packing layer 63 and the bio-packing layer 62, and the gas entering the treatment tank 61 passes through the plastic packing layer 63 and the bio-packing layer 62 in sequence. The plastic filler layer 63 and the biological filler layer 62 are arranged side by side in the treatment tank 61. The treatment tank 61 is provided with a space both above and below the plastic packing layer 63 and the bio-packing layer 62. The adsorption degradation device 6 refers to a process that odor sequentially passes through degradation organic matters of activated sludge and adsorption of impurities by biological fillers.

The specific structure of the bio-filler layer 62 is as follows:

as shown in fig. 2, the bio-filler layer 62 includes bio-filler 621 and a plurality of sludge support plates 622, in two adjacent sludge support plates 622, one layer of sludge support plate 622 is fixed on the partition plate 64, the other layer is fixed on the wall of the treatment tank 61, and a certain gap is formed between the sludge support plate 622 fixed on the partition plate 64 and the wall of the treatment tank 61, so that sludge can flow from top to bottom conveniently, a certain gap is formed between the sludge support plate 622 fixed on the wall of the treatment tank 61 and the partition plate 64, so that sludge can flow from top to bottom conveniently, the path of the activated sludge 83 on the multiple layers of sludge support plates 622 is S-shaped, biological fillers 621 are arranged on each layer of sludge support plate 622, the activated sludge 83 is wrapped outside the biological fillers 621, a plurality of first air holes 623 are arranged on the sludge support plate 622, and the aperture of the first air holes 623 is smaller than the particle size of the activated sludge 83 and the particle size of the biological fillers 621. In fig. 2, arrow a indicates the direction of the treated gas from bottom to top, arrow b indicates the direction of the activated sludge from top to bottom, and the activated sludge flows from one end of the sludge support plate 622 to the other end, and from the previous sludge support plate 622 to the next sludge support plate 622; the gas flows from the lower end of the biological filler layer 62 to the upper end through the pore channels on the sludge support plate 622, and the gas can fully contact with the biological filler 621 and the activated sludge 83. The biological filler 621 adopts bioactive ceramsite, is required to be light, has proper porosity, long service life, is easy to form a film, and has very good hydrophilicity.

The plastic packing layer 63 has the following specific structure:

the plastic filler layer 63 comprises a plastic filler 631 and a support plate 632, two ends of the support plate 632 are respectively fixed on the tank wall of the treatment tank 61 and the partition plate 64, the support plate 632 is provided with a plurality of second ventilation holes 633, and the aperture of the second ventilation holes 633 is smaller than the particle size of the plastic filler 631. After entering the treatment tank 61, the gas passes through the plastic filler layer 63 from top to bottom and passes through the biological filler layer 62 from bottom to top. The filling plastic 631 is made of conventional plastic materials, and the particle size of the filling plastic is larger than 2 times of the diameter of the hole of the second vent hole 633.

In this embodiment, the deodorization system further includes a spraying device 9, the spraying device 9 includes a reclaimed water tank 91, a spraying pipe 92 and a first nozzle 921 arranged on the spraying pipe 92, the spraying pipe 92 is connected with the reclaimed water tank 91, the first nozzle 921 is arranged in the treatment tank 61 and is located above the plastic packing layer 63, the air pump 5 is connected with the treatment tank 61 through an air inlet pipe 51, and a connection point of the air inlet pipe 51 and the treatment tank 61 is located above the plastic packing layer 63.

In this embodiment, the spraying device 9 further includes a cleaning pipe 93, a second spray nozzle 931 is disposed on the cleaning pipe 93, the cleaning pipe 93 is connected to the recycled water tank 91, and the second spray nozzle 931 is disposed in the treatment tank 61 and above the bio-filler layer 62; the activated sludge conveying pipe 82 is connected with the second spray head 931, and the activated sludge conveying pipe 82 is provided with a sludge spray pump 84 and a sludge spray adjusting valve 85; a reclaimed water spray pump 94 is arranged between the reclaimed water pool 91 and the spray pipe 92 and the cleaning pipe 93, and a first reclaimed water valve 922 and a second reclaimed water valve 932 are arranged on the spray pipe 92 and the cleaning pipe 93.

The spraying device 9, the biological filler layer 62 and the plastic filler layer 63 are combined to work according to the working principle:

in the foul smell got into and handles pond 61, at first spray nozzle 921 sprays the foul smell, the purpose is washed the foul smell, dissolve partly soluble gas and partly soluble solid, pass through plastic packing layer 63 again, provide the carrier and prolong dwell time for the water-air mixing process, the sparge water flows to handling pond 61 bottom through plastic packing layer 63, undissolved gas passes through bio-packing layer 62 from bottom to top again, carry out biological adsorption and activated sludge degradation organic matter in bio-packing layer 62, mainly degrade the oxygen-containing compound inside the foul smell, contain hydrogen compound and halogen and derivative, release a small amount of marsh gas simultaneously, the gas that breaks away from bio-packing layer 62 discharges through blast pipe 66 at top. Meanwhile, a methane detector 71 is mounted on the exhaust pipe 66 to mainly detect the concentration of methane, and then whether the methane enters the flare combustion device 7 is determined according to indexes. The washing sewage is conveyed to the MBR biochemical device 7 through the sludge discharge pump 651 and the sludge discharge pipe 65, the activated sludge after the sewage is treated by the MBR biochemical device 7 is taken as the supplement of the activated sludge of the biological packing layer 62, the activated sludge is conveyed to the adsorption and degradation device 6 through the activated sludge conveying pipe 82 and the sludge spray pump 84, the activated sludge is uniformly sprayed to the biological packing layer 62 in a spraying mode through the second spray head 931, and the sludge passes through the biological packing layer and then returns to the biochemical device 7 through the sludge discharge pump 651.

The reclaimed water spraying device 9 has the function of flushing odor and sludge attached to the surface of the biological filler 621, and can spray and deliver the sludge through the second reclaimed water valve 932 and the sludge spraying adjusting valve 85. The pH value of the washing water is required to be 5-9, and the gas-water ratio is controlled to be 1200: 1-0.6.

It should be noted that the second spraying nozzle 931 not only can spray the activated sludge onto the bio-filler layer 62, but also can clean the bio-filler layer 62 after the treatment. Similarly, the first nozzle 921 can also clean the plastic packing layer 63.

In this embodiment, the equalizing basin closing device 2 includes an equalizing basin 21 and a geomembrane 22, and the geomembrane 22 covers the equalizing basin 21 to form a closed space in the equalizing basin 21. The geomembrane 22 extends to the ground on the periphery of the regulating reservoir 21 and is fixed; the surface of the geomembrane 22 facing the interior of the regulating reservoir 21 is provided with a plurality of floating covers 23, each floating cover 23 consists of a geomembrane and a sponge, and the geomembrane of each floating cover 23 is welded with the geomembrane 22 covering the regulating reservoir 21. The ground around the adjusting tank 21 is provided with an anchoring ditch 24, and the geomembrane 22 extends to cover the anchoring ditch 24 and is welded with the anchoring ditch 24 (the geomembrane is High Density Polyethylene (HDPE) membrane, and can be welded by adopting special materials).

In this embodiment, the odor collecting device 3 further includes an odor collecting main pipe 31 and a plurality of air inlet branch pipes 32, one end of each air inlet branch pipe 32 penetrates through the geomembrane 22 to be communicated with the regulating reservoir 21, the other end of each air inlet branch pipe 32 is connected with the air inlet end of the odor collecting main pipe 31, and the air outlet end of the odor collecting main pipe 31 is connected with the water-gas separator 4; the air inlet branch pipe 32 is divided into an upper section 321 and a lower section 322, the upper section 321 is located above the geomembrane 22, the upper section 321 is an airtight PR pipe, the lower section 322 is located below the geomembrane 22, the outer wall of the lower section 322 is provided with a plurality of air inlet holes 323 (the lower section is of an open-pore perforated pipe structure), and the bottom of the pipe is closed by a blind plate 324. The gas inlet branch pipes 32 collect the biogas in the regulating tank 21, join the biogas collection main pipe 31, and are drawn out from the outlet end of the biogas collection main pipe 31.

In this embodiment, a pipeline control valve 33 capable of controlling the opening of the pipeline is arranged between the outlet end of the main odor collection pipe 31 and the water-gas separator 4, and the pipeline control valve 33 is used for controlling the opening of the pipeline to prevent the landfill leachate from being pumped into the air pump 5. A return pipe 34 is arranged between the outlet end of the main odor collecting pipe 31 and the pipeline control valve 33, the return pipe 34 is connected with the adjusting tank 21, and the return pipe 34 is provided with a drain valve 35. The arrangement of the return pipe 34 and the drain valve 35 is used for discharging condensed water condensed at the low point of the pipeline after the water vapor of the garbage percolate in the regulating reservoir 21 is evaporated, and discharging the condensed water into the regulating reservoir 21 to prevent gas from leaking into the atmosphere.

In the embodiment, the water-gas separator 4 is installed at the downstream of the odor collecting system 3 and at the upstream of the air pump 5, a first pressure gauge 41 and a second pressure gauge 42 are respectively installed at the front and the rear of the water-gas separator 4, each pressure gauge is provided with a pressure sensor, the pressure of the pipeline is controlled by the frequency of the air pump 5 and the opening degree of the pipeline control valve 33, the first pressure gauge 41 is smaller than 0.3MPa, and the pressure difference between the first pressure gauge 41 and the second pressure gauge 42 is smaller than 0.05MPa in the operation process.

The implementation case is as follows:

watch 1

Remarks 1: the inlet gas sampling port is positioned at the outlet end of the odor collecting system;

remarks 2: the gas outlet sampling port is positioned at the tail end of the torch combustion system;

the odor continuously generated in the percolate adjusting tank is collected by the odor collecting system 3, the odor enters the water-gas separator 4 to reduce the humidity of the odor, and the main pollutant index of the odor at the stage is shown in the table intake air concentration. The odor after the steam-water separation is sucked into an adsorption and degradation device 6 by a suction pump 5, the air suction amount is 5000m3 per hour, in order to maintain the stability and the treatment effect of a biological treatment system, activated sludge is periodically connected into an MBR biochemical device for percolate treatment and is supplemented into biological fillers, the activated sludge is supplemented for 1 time per week, and the supplement amount is about 100kg per time. The odor after biological treatment, hydrogen sulfide, ammonia, odor concentration and other indexes can reach the standard (see the first gas outlet concentration in the table).

In the high temperature period in summer, because the methane concentration in the odor is higher, the waste gas treated by the biological deodorization system enters the torch combustion system 8 for combustion disposal.

In the low water period of leachate in winter, because the odor generation amount is small and unstable and the concentration content of methane is low, the waste gas treated by the biological deodorization system directly reaches the standard and is discharged.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to be limited thereto. Those skilled in the art can make numerous possible variations and modifications to the present invention, or modify equivalent embodiments to equivalent variations, without departing from the scope of the invention, using the teachings disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention should fall within the protection scope of the technical scheme of the present invention, unless the technical spirit of the present invention departs from the content of the technical scheme of the present invention.

Claims

1. The utility model provides a landfill leachate equalizing basin deodorization system which characterized in that: including inlet channel (1), equalizing basin obturator (2), foul smell collection device (3), moisture separator (4), aspiration pump (5), adsorption degradation device (6), torch burner (7) and MBR biochemical device (8), inlet channel (1), equalizing basin obturator (2), foul smell collection device (3), moisture separator (4), aspiration pump (5) communicate in proper order, adsorption degradation device (6) are including handling pond (61) and bio-packing layer (62), aspiration pump (5) and processing pond (61) intercommunication, bio-packing layer (62) are located and are used for adsorbing the gas of aspiration pump (5) pump income in handling pond (61), MBR biochemical device (8) are including biochemical pond (81) and active sludge conveyer pipe (82), active sludge conveyer pipe (82) and processing pond (61) intercommunication are used for spouting bio-packing layer (83) in biochemical pond (81) to bio-packing layer ((81)), (60) 62) The device comprises a treatment tank (61), a biochemical tank (81) and an exhaust pipe (65), wherein the treatment tank (61) is connected with the biochemical tank (81), the treatment tank (61) is connected with a torch combustion device (7) through the exhaust pipe (66), and the torch combustion device (7) is used for burning gas discharged from the treatment tank (61).

2. The landfill leachate conditioning tank deodorization system of claim 1, wherein: the adsorption degradation device (6) further comprises a plastic packing layer (63), an isolation plate (64) is arranged between the plastic packing layer (63) and the biological packing layer (62), and gas entering the treatment tank (61) sequentially passes through the plastic packing layer (63) and the biological packing layer (62).

3. The landfill leachate conditioning tank deodorization system of claim 2, wherein: deodorization system still includes spray set (9), spray set (9) include well pond (91), shower (92) and locate first shower nozzle (921) on shower (92), shower (92) are connected with well pond (91), first shower nozzle (921) are located in handling pond (61) and are located the top of plastics packing layer (63), aspiration pump (5) are connected with handling pond (61) through intake pipe (51), intake pipe (51) and the tie point of handling pond (61) are in the top of plastics packing layer (63).

4. The landfill leachate conditioning tank deodorization system of claim 3, wherein: the spraying device (9) further comprises a cleaning pipe (93), a second spray head (931) is arranged on the cleaning pipe (93), the cleaning pipe (93) is connected with the reclaimed water tank (91), and the second spray head (931) is arranged in the treatment tank (61) and is positioned above the biological filler layer (62); the activated sludge conveying pipe (82) is connected with a second spray head (931), and a sludge spraying pump (84) and a sludge spraying adjusting valve (85) are arranged on the activated sludge conveying pipe (82); be equipped with well water spray pump (94) between well pond (91) and shower (92) and scavenge pipe (93), be equipped with water valve (922) in first and second and water valve (932) on shower (92) and scavenge pipe (93).

5. The landfill leachate conditioning tank deodorization system of any one of claims 1 to 4, wherein: be equipped with methane detector (71) on blast pipe (66), blast pipe (66) divide into first blast pipe (661) and second blast pipe (662), first blast pipe (661) are connected with torch burner (7), second blast pipe (662) and atmosphere intercommunication, be equipped with first discharge valve (663) and second discharge valve (664) on first blast pipe (661) and second blast pipe (662) respectively.

6. The landfill leachate conditioning tank deodorization system of any one of claims 1 to 4, wherein: the biological filler layer (62) comprises biological fillers (621) and a plurality of layers of sludge supporting plates (622), wherein in two adjacent layers of sludge supporting plates (622), one layer of sludge supporting plate (622) is fixed on the isolation plate (64), the other layer of sludge supporting plate is fixed on the wall of the treatment pool (61), a certain gap is formed between the sludge supporting plate (622) fixed on the isolation plate (64) and the wall of the treatment pool (61), a certain gap is formed between the sludge supporting plate (622) fixed on the wall of the treatment pool (61) and the isolation plate (64), the path of the activated sludge (83) on the multilayer sludge supporting plate (622) is S-shaped, the biological fillers (621) are arranged on each layer of sludge supporting plate (622), the activated sludge (83) is wrapped outside the biological fillers (621), a plurality of first air holes (623) are arranged on the sludge supporting plate (622), and the aperture of the first air holes (623) is smaller than the particle size of the activated sludge (83) and the particle size of the biological fillers (621) And (4) the particle size.

7. The landfill leachate conditioning tank deodorization system of any one of claims 2 to 4, wherein: the plastic filler layer (63) comprises a plastic filler (631) and a support plate (632), the two ends of the support plate (632) are respectively fixed on the tank wall and the isolation plate (64) of the treatment tank (61), the support plate (632) is provided with a plurality of second air holes (633), and the aperture of the second air holes (633) is smaller than the particle size of the plastic filler (631).

8. The landfill leachate conditioning tank deodorization system of any one of claims 1 to 4, wherein: the adjusting tank sealing device (2) comprises an adjusting tank (21) and a geomembrane (22), wherein the geomembrane (22) covers the adjusting tank (21), and the geomembrane (22) extends to the ground on the periphery of the adjusting tank (21) and is fixed; the geomembrane (22) is equipped with a plurality of floating covers (23) towards the face in equalizing basin (21), floating cover (23) include the sponge by the geomembrane and constitute, weld between the geomembrane of floating cover (23) and the geomembrane (22) that covers equalizing basin (21).

9. The landfill leachate conditioning tank deodorization system of claim 8, wherein: the odor collecting device (3) further comprises an odor collecting main pipe (31) and a plurality of air inlet branch pipes (32), one end of each air inlet branch pipe (32) penetrates through the geomembrane (22) to be communicated with the regulating tank (21), the other end of each air inlet branch pipe is connected with the air inlet end of the odor collecting main pipe (31), and the air outlet end of the odor collecting main pipe (31) is connected with the water-gas separator (4); the air inlet branch pipe (32) is divided into an upper section (321) and a lower section (322), the upper section (321) is located above the geomembrane (22), the upper section (321) is a PR pipe, the lower section (322) is located below the geomembrane (22), the outer wall of the lower section (322) is provided with a plurality of air inlet holes (323), and the bottom of the pipe is sealed by a blind plate (324).

10. The landfill leachate conditioning tank deodorization system of claim 9, wherein: the odor collecting device is characterized in that a pipeline control valve (33) capable of controlling the opening degree of a pipeline is arranged between the outlet end of the main pipe (31) and the water-gas separator (4), a return pipe (34) is arranged between the outlet end of the main pipe (31) and the pipeline control valve (33), the return pipe (34) is connected with the adjusting tank (21), and a drainage valve (35) is arranged on the return pipe (34).