CN210313801U - Integrated device suitable for landfill leachate pretreatment - Google Patents
Integrated device suitable for landfill leachate pretreatment Download PDFInfo
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- CN210313801U CN210313801U CN201920805954.8U CN201920805954U CN210313801U CN 210313801 U CN210313801 U CN 210313801U CN 201920805954 U CN201920805954 U CN 201920805954U CN 210313801 U CN210313801 U CN 210313801U
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Abstract
The utility model discloses an integrated device suitable for landfill leachate preliminary treatment, include: a dosing sedimentation tank, a membrane filtration tank and a sulfuric acid absorption tank; the dosing precipitation is provided with a first water inlet and a first water outlet; the membrane filtering tank is provided with a second water inlet and a second air outlet; the sulfuric acid absorption tank is provided with a third air inlet; the integrated device suitable for landfill leachate preliminary treatment still includes: a first pipeline and a second pipeline; two ends of the first pipeline are respectively communicated with the first water outlet and the second water inlet; two ends of the second pipeline are respectively communicated with the second air outlet and the third air inlet; the dosing sedimentation tank is also provided with an alkali liquor dosing port, a coagulant dosing port, a flocculant dosing port and a sludge discharge port; a filtering membrane and an aeration device are arranged in the membrane filtering tank. The integrated device suitable for landfill leachate pretreatment has higher treatment efficiency on the landfill leachate, and can realize recycling of ammonia nitrogen.
Description
Technical Field
The utility model relates to an integrated device suitable for landfill leachate preliminary treatment.
Background
The landfill leachate is very complex high-concentration organic sewage, has complex composition and high contents of heavy metal ions, organic matters and ammonia nitrogen. The traditional treatment of the landfill leachate adopts a mode of combining biochemical treatment and a membrane filtration process. However, the biochemical method is adopted as a pretreatment process, particularly, leachate generated by a refuse landfill with a long factory age has poor biochemical performance, an ideal effect is difficult to obtain by direct biochemical treatment, the impact load resistance is poor, and the stability is limited.
SUMMERY OF THE UTILITY MODEL
The utility model provides an integrated device suitable for landfill leachate preliminary treatment adopts following technical scheme:
an integrated device suitable for landfill leachate pretreatment, comprising: the device comprises a dosing sedimentation tank for treating the landfill leachate, a membrane filtration tank for filtering the landfill leachate treated by the dosing sedimentation tank and a sulfuric acid absorption tank for absorbing ammonia gas in the landfill leachate in the membrane filtration tank; the dosing sedimentation tank is provided with a first water inlet for discharging the garbage percolate into the dosing sedimentation tank and a first water outlet for discharging the garbage percolate treated in the dosing sedimentation tank; the membrane filtering tank is provided with a second water inlet for discharging the landfill leachate discharged from the chemical dosing sedimentation tank into the membrane filtering tank and a second air outlet for discharging ammonia gas generated in the landfill leachate in the membrane filtering tank; the sulfuric acid absorption tank is provided with a third air inlet for the ammonia gas discharged from the membrane filtration tank to enter; the integrated device suitable for landfill leachate preliminary treatment still includes: a first pipeline and a second pipeline; two ends of the first pipeline are respectively communicated with the first water outlet and the second water inlet; two ends of the second pipeline are respectively communicated with the second air outlet and the third air inlet; the dosing sedimentation tank is also provided with an alkali liquor dosing port for adding alkali liquor into the dosing sedimentation tank, a coagulant dosing port for adding a coagulant into the dosing sedimentation tank, a flocculant dosing port for adding a flocculant into the dosing sedimentation tank and a sludge discharge port for discharging precipitated sludge in the dosing sedimentation tank; the alkali liquor dosing port, the first water inlet, the coagulant dosing port, the flocculant dosing port and the sludge discharge port are communicated to the inside of the dosing sedimentation tank; the membrane filtering tank is internally provided with a filtering membrane for filtering the landfill leachate and an aeration device for aerating the inside of the membrane filtering tank so as to enable ammonia gas in the landfill leachate to move upwards to be separated from the landfill leachate.
Further, the aeration device is arranged at the bottom of the membrane filtering tank and below the filtering membrane.
Furthermore, the dosing sedimentation tank is provided with a reaction area for reacting the garbage percolate with alkali liquor, a coagulant and a flocculant and a sedimentation area for precipitating flocculent sludge generated after the garbage percolate reacts with the alkali liquor, the coagulant and the flocculant; the reaction zone is located above the precipitation zone.
Further, the alkali liquor dosing port, the first water inlet, the coagulant dosing port and the flocculant dosing port are communicated to the reaction zone.
Furthermore, the dosing sedimentation tank is also provided with a stirrer for stirring the garbage percolate, the alkali liquor, the coagulant and the flocculating agent to fully mix the garbage percolate, the alkali liquor, the coagulant and the flocculating agent; the agitator is located in the reaction zone.
Further, the stirrer is positioned between the plane where the alkali liquor dosing port is positioned and the plane where the first water inlet is positioned.
Furthermore, the first water outlet is arranged in the reaction zone and positioned at the upper part of the reaction zone.
Furthermore, the integrated device suitable for the landfill leachate pretreatment also comprises a PH value detector used for measuring the PH value in the dosing sedimentation tank; the PH value detector is arranged in the reaction area and is positioned at the upper part of the reaction area.
Further, the second air outlet is arranged at the top of the membrane filtration tank.
Further, the tank wall of a settling zone formed by the dosing sedimentation tank is conical; the sludge discharge port is positioned at the bottom of the conical settling zone.
The utility model discloses an useful part lies in that the integrated device that is applicable to landfill leachate preliminary treatment that provides collects and adds medicine sedimentation tank, membrane filtration pond and sulphuric acid absorption tank as an organic whole, has effectually saved resource and area, is convenient for transport and builds temporarily.
The integrated device suitable for landfill leachate pretreatment can meet the pretreatment conditions of landfill leachate with different water qualities by coupling three pretreatment processes of a dosing sedimentation tank, a membrane filtration tank and a sulfuric acid absorption tank, and provides guarantee for stable operation at the rear end of the landfill leachate treatment process.
Aeration equipment in the membrane filtering pond not only can blow off the ammonia, but also can realize carrying out abluent purpose to filtration membrane, the effectual pollution that reduces filtration membrane surface.
The ammonia gas which is blown off by the aeration device and separated from the landfill leachate in the membrane filter tank enters a sulfuric acid absorption tank to react with sulfuric acid to generate ammonium sulfate, so that the aim of resource recovery and reutilization is fulfilled.
Drawings
Fig. 1 is a schematic diagram of the integrated device suitable for landfill leachate pretreatment of the utility model.
The integrated device 100 suitable for landfill leachate pretreatment, alkali liquor dosing port 1, first water inlet 2, dosing sedimentation tank 3, stirrer 4, reaction zone 5, sedimentation zone 6, sludge discharge port 7, first water outlet 8, coagulant dosing port 9, flocculant dosing port 10, pH value detector 11, membrane filtration tank 12, aeration device 13, second gas outlet 14, filtration membrane 15, sulfuric acid absorption tank 16, second water inlet 17, third gas inlet 18, first pipeline 19, second pipeline 20.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
As shown in fig. 1, an integrated device 100 suitable for landfill leachate pretreatment comprises: a dosing sedimentation tank 3, a membrane filtration tank 12 and a sulfuric acid absorption tank 16. The dosing sedimentation tank 3 is used for treating the landfill leachate. The membrane filtering tank 12 is used for filtering the landfill leachate treated by the dosing sedimentation tank 3. The sulfuric acid absorption tank 16 is used for absorbing ammonia gas in the landfill leachate in the membrane filtration tank 12.
Specifically, the dosing sediment is provided with a first water inlet 2 and a first water outlet 8. The first water inlet 2 is used for discharging the landfill leachate into the dosing sedimentation tank 3. The first water outlet 8 is used for discharging the garbage percolate treated in the dosing sedimentation tank 3. The membrane filtration tank 12 is provided with a second water inlet 17 and a second air outlet 14. The second water inlet 17 is used for discharging the landfill leachate discharged from the dosing sedimentation tank 3 into the membrane filtration tank 12. The second air outlet 14 is used for discharging ammonia gas generated in the landfill leachate in the membrane filtration tank 12. The sulfuric acid absorption tank 16 is provided with a third air inlet 18. The third air inlet 18 is used for the ammonia gas discharged from the membrane filtration tank 12. The integrated device 100 suitable for landfill leachate pretreatment also includes: a first line 19 and a second line 20. The two ends of the first pipeline 19 are respectively communicated with the first water outlet 8 and the second water inlet 17 so as to realize the communication between the dosing sedimentation tank 3 and the membrane filtration tank 12, and therefore the treated landfill leachate in the dosing sedimentation tank 3 is discharged into the membrane filtration tank 12 for filtration. The two ends of the second pipeline 20 are respectively communicated with the second air outlet 14 and the third air inlet 18 to realize the communication between the membrane filtration tank 12 and the sulfuric acid absorption tank 16, so that ammonia gas in the membrane filtration tank 12 is discharged into the sulfuric acid absorption tank 16 to be absorbed and reacted by sulfuric acid to generate ammonium sulfate.
More specifically, the dosing sedimentation tank 3 is further provided with an alkali liquor dosing port 1, a coagulant dosing port 9, a flocculant dosing port 10 for adding a flocculant into the dosing sedimentation tank 3, and a sludge discharge port 7. The alkali liquor dosing port 1 is used for adding alkali liquor into the dosing sedimentation tank 3. The coagulant adding port 9 is used for adding coagulant into the drug adding sedimentation tank 3. The flocculant adding port 10 is used for adding a flocculant into the dosing sedimentation tank 3. The sludge discharge port 7 is used for discharging the precipitated sludge in the dosing sedimentation tank 3. The alkali liquor dosing port 1, the first water inlet 2, the coagulant dosing port 9, the flocculant dosing port 10 and the sludge discharge port 7 are communicated to the inside of the dosing sedimentation tank 3.
Further, a filtering membrane 15 and an aeration device 13 are arranged in the membrane filtering tank 12. The filtering membrane 15 is used for filtering the landfill leachate. The aeration device 13 is used for aerating the membrane filtration tank 12 to enable the ammonia gas in the landfill leachate to move upwards to be separated from the landfill leachate, so that the ammonia gas can be discharged into the sulfuric acid absorption tank 16 through a second pipeline.
As a specific embodiment, the aeration device 13 is arranged at the bottom of the membrane filtration tank 12 and below the filtration membrane 15, so that the aeration device 13 can clean the surface of the filtration membrane 15 while aerating to drive the ammonia gas to move upwards.
As a specific embodiment, the dosing sedimentation tank 3 is formed with a reaction zone 5 and a sedimentation zone 6. The reaction zone 5 is used for reacting the landfill leachate with alkali liquor, coagulant and flocculant. The sedimentation zone 6 is used for sedimentation of flocculent sludge generated after the reaction of the landfill leachate, alkali liquor, coagulant and flocculant. The reaction zone 5 is located above the precipitation zone 6.
Further, an alkali liquor dosing port 1, a first water inlet 2, a coagulant dosing port 9 and a flocculant dosing port 10 are communicated to the reaction zone 5.
As a specific implementation mode, the dosing sedimentation tank 3 is also provided with a stirrer 4. The stirrer 4 is used for stirring the garbage percolate, the alkali liquor, the coagulant and the flocculating agent to fully mix the garbage percolate, the alkali liquor, the coagulant and the flocculating agent. An agitator 4 is located in the reaction zone 5.
Further, the stirrer 4 is positioned between the plane of the alkali liquor feeding port 1 and the plane of the first water inlet 2. The arrangement is such that the landfill leachate and the lye entering from the first water inlet 2 can be mixed and reacted sufficiently. As a more specific structure, the coagulant feeding port 9 and the alkali liquor feeding port 1 are positioned on the same plane, and the flocculant feeding port 10 and the first water inlet 2 are positioned on the same plane. This enables the mixer 4 to thoroughly mix the landfill leachate, the alkali liquor, the coagulant and the flocculant.
In a specific embodiment, the first water outlet 8 is disposed in the reaction zone 5 and above the reaction zone 5. The landfill leachate positioned at the upper part of the reaction zone 5 is treated landfill leachate which is subjected to mixing reaction and precipitation, and the arrangement can ensure that the landfill leachate entering the membrane filtration tank 12 from the first water outlet 8 is treated landfill leachate.
As a specific implementation manner, the integrated device 100 suitable for landfill leachate pretreatment further includes a PH detector 11. The PH value detector 11 is used for measuring the PH value in the dosing sedimentation tank 3. Specifically, the pH meter 11 is disposed in the reaction zone 5 and is located at the upper portion of the reaction zone 5.
Specifically, the addition amount of the alkali liquor can be controlled according to the data detected by the pH detector 11, so that the pH value of the liquid obtained by mixing the landfill leachate and the alkali liquor is adjusted to be between 11.5 and 12. So that the alkalinity of the mixed liquid does not affect the performance of the filtration membrane 15.
In a specific embodiment, the second gas outlet 14 is disposed at the top of the membrane filtration tank 12. This arrangement facilitates the upward movement of ammonia gas eventually entering the sulfuric acid absorption tank 16 via the second pipe 20.
As a specific embodiment, the tank wall of the dosing sedimentation tank 3 forming the sedimentation zone 6 is conical. The sludge discharge opening 7 is located at the bottom of the conical settling zone 6. The tank wall of the precipitation zone 6 formed by the dosing sedimentation tank 3 is set to be a conical structure, so that the precipitated substances in the precipitation zone 6 can be conveniently collected, and finally the precipitated substances are discharged from the bottom of the conical precipitation zone 6.
Specifically, the integrated device 100 suitable for landfill leachate pretreatment is a landfill leachate pretreatment process device integrating a dosing sedimentation tank 3, a membrane filtration tank 12 and a sulfuric acid absorption tank 16, and the process comprises the following steps: a dosing sedimentation process in the dosing sedimentation tank 3, a membrane filtration process of the membrane filtration tank 12 and a deamination process of the sulfuric acid absorption tank 16 after the aeration device 13 blows off ammonia gas.
The principle of the dosing and precipitating process is that a coagulant and a flocculant are added into the landfill leachate to realize the coagulation process and the flocculation process, and alkali liquor is added to adjust the pH value of the landfill leachate to 11.5-12. The alkali liquor reacts with the alkalinity in the landfill leachate to remove the hardness in the landfill leachate. Meanwhile, the addition of the alkali liquor can directly react with the heavy metal in the landfill leachate to generate precipitate, so that the heavy metal is removed. The coagulating process is to add coagulant with positive electric nucleus into the garbage percolate to neutralize the negative electric nucleus on the surface of fine particles in the garbage percolate so as to destabilize the particles. Then, the particles are mutually bonded to each other to become larger by the action of collision, surface adsorption, van der waals attraction, etc., so that fine contaminant particles are precipitated from the landfill leachate, and many fine flocks are visually observed to be generated. The flocculation process refers to the actions of neutralization, adsorption, bridging, net catching and the like caused by the suspension of polymer macromolecular chains of the polymer among particles through a flocculating agent. The bridging means that different chain segments on polymer molecules are adsorbed on different particles to promote the aggregation of the particles and preferably form large floccules, thereby achieving the purpose of mud-water separation. The dosing and precipitating process mainly removes hardness, heavy metals, suspended matters, colloid and partial organic matters in the landfill leachate.
The principle of the membrane filtration process is a filtration mechanism, i.e. a process in which substances larger than the pore size are retained and substances smaller than the pore size permeate the filtration membrane 15 by the sieving principle of the pore size. The filtering membrane 15 is mainly used for intercepting suspended matters remained in the water body, and the water quality of the produced water is guaranteed to reach the standard. It is worth noting that the landfill leachate is adjusted by alkali liquor, the pH value of the landfill leachate is 11.5-12, and the performance of the filtering membrane 15 cannot be affected.
The principle of the ammonia blowing process is mainly that the PH value in the landfill leachate is adjusted to ensure that NH in the water body4 +Conversion to NH3The (above-mentioned ammonia gas) is blown off by the aeration device 13, so that NH in the water body3Overflows and enters a sulfuric acid absorption tank 16 to be absorbed by sulfuric acid, and the product ammonium sulfate is obtained. The process requires attention to pH of the water adjusted with the alkali solution greater than 11.5, which promotes NH4 +To NH3High conversion rate, benefit for NH3Stripping is carried out. In the blowing-off process, the aeration device 13 not only can blow off ammonia nitrogen, but also can clean the filtering membrane 15, and can effectively reduce the pollution on the membrane surface.
In the above scheme, the alkali solution in the dosing and precipitating process can be sodium hydroxide solution, and can also be potassium hydroxide solution or calcium hydroxide solution. The filter membrane can be a flat ceramic membrane, a tubular ceramic membrane or other forms of ceramic ultrafiltration microfiltration membranes.
The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It should be understood by those skilled in the art that the above embodiments do not limit the present invention in any way, and all technical solutions obtained by adopting equivalent replacement or equivalent transformation fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides an integrated device suitable for landfill leachate preliminary treatment which characterized in that includes: the device comprises a dosing sedimentation tank for treating the landfill leachate, a membrane filtration tank for filtering the landfill leachate treated by the dosing sedimentation tank and a sulfuric acid absorption tank for absorbing ammonia gas in the landfill leachate in the membrane filtration tank; the dosing sedimentation is provided with a first water inlet for discharging the garbage percolate into the dosing sedimentation tank and a first water outlet for discharging the garbage percolate treated in the dosing sedimentation tank; the membrane filtering tank is provided with a second water inlet through which the landfill leachate discharged from the dosing sedimentation tank is discharged into the membrane filtering tank and a second air outlet through which ammonia gas generated in the landfill leachate in the membrane filtering tank is discharged; the sulfuric acid absorption tank is provided with a third air inlet for the ammonia gas discharged from the membrane filtration tank to enter; the integrated device suitable for landfill leachate preliminary treatment still includes: a first pipeline and a second pipeline; two ends of the first pipeline are respectively communicated with the first water outlet and the second water inlet; two ends of the second pipeline are respectively communicated with the second air outlet and the third air inlet; the dosing sedimentation tank is also provided with an alkali liquor dosing port for adding alkali liquor into the dosing sedimentation tank, a coagulant dosing port for adding a coagulant into the dosing sedimentation tank, a flocculant dosing port for adding a flocculant into the dosing sedimentation tank and a sludge discharge port for discharging precipitated sludge in the dosing sedimentation tank; the alkali liquor dosing port, the first water inlet, the coagulant dosing port, the flocculant dosing port and the sludge discharge port are communicated to the inside of the dosing sedimentation tank; and a filtering membrane for filtering the landfill leachate and an aeration device for aerating the membrane filtering tank so as to enable ammonia gas in the landfill leachate to move upwards to be separated from the landfill leachate are arranged in the membrane filtering tank.
2. The integrated device suitable for the pretreatment of landfill leachate according to claim 1,
the aeration device is arranged at the bottom of the membrane filtering tank and is positioned below the filtering membrane.
3. The integrated device for the pretreatment of landfill leachate according to claim 2, wherein,
the chemical adding sedimentation tank is provided with a reaction area for reacting the garbage percolate with alkali liquor, a coagulant and a flocculant and a sedimentation area for precipitating flocculent sludge generated after the garbage percolate reacts with the alkali liquor, the coagulant and the flocculant; the reaction zone is located above the precipitation zone.
4. The integrated device suitable for the pretreatment of landfill leachate according to claim 3,
the alkali liquor dosing port, the first water inlet, the coagulant dosing port and the flocculant dosing port are communicated to the reaction zone.
5. The integrated device suitable for the pretreatment of landfill leachate according to claim 4,
the dosing sedimentation tank is also provided with a stirrer for stirring the garbage percolate, the alkali liquor, the coagulant and the flocculating agent to be fully mixed; the agitator is located in the reaction zone.
6. The integrated device suitable for the pretreatment of landfill leachate according to claim 5,
the stirrer is positioned between the plane where the alkali liquor dosing port is positioned and the plane where the first water inlet is positioned.
7. The integrated device suitable for the pretreatment of landfill leachate according to claim 3,
the first water outlet is arranged in the reaction zone and positioned at the upper part of the reaction zone.
8. The integrated device suitable for the pretreatment of landfill leachate according to claim 7,
the integrated device suitable for the landfill leachate pretreatment further comprises a PH value detector used for measuring the PH value in the dosing sedimentation tank; the PH value detector is arranged in the reaction zone and is positioned at the upper part of the reaction zone.
9. The integrated device suitable for the pretreatment of landfill leachate according to claim 1,
the second air outlet is arranged at the top of the membrane filtration tank.
10. The integrated device suitable for the pretreatment of landfill leachate according to claim 3,
the tank wall of the precipitation zone formed by the dosing precipitation tank is conical; the sludge discharge port is positioned at the bottom of the conical settling zone.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920805954.8U CN210313801U (en) | 2019-05-30 | 2019-05-30 | Integrated device suitable for landfill leachate pretreatment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920805954.8U CN210313801U (en) | 2019-05-30 | 2019-05-30 | Integrated device suitable for landfill leachate pretreatment |
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| CN210313801U true CN210313801U (en) | 2020-04-14 |
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| CN201920805954.8U Active CN210313801U (en) | 2019-05-30 | 2019-05-30 | Integrated device suitable for landfill leachate pretreatment |
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