CN212610162U - Resource recycling treatment system for leachate of waste incineration plant - Google Patents

Resource recycling treatment system for leachate of waste incineration plant Download PDF

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CN212610162U
CN212610162U CN202021552980.3U CN202021552980U CN212610162U CN 212610162 U CN212610162 U CN 212610162U CN 202021552980 U CN202021552980 U CN 202021552980U CN 212610162 U CN212610162 U CN 212610162U
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tank
treatment
water
membrane
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曹海燕
段贵平
叶正平
张瑞艳
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Beijing Guohuan Rhine Environmental Co ltd
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Beijing Guohuan Rhine Environmental Co ltd
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Abstract

The utility model provides a brand-new resource recycling treatment system for leachate of a waste incineration plant, which comprises a pretreatment unit, a biochemical treatment unit and a deep treatment unit which are connected in sequence, wherein the pretreatment unit comprises an adjusting tank, and a water inlet of the adjusting tank is provided with a filtering device; the biochemical treatment unit comprises an anaerobic unit, a membrane aeration biological reaction tank, an aerobic tank and a secondary sedimentation tank which are connected in sequence. The utility model discloses a membrane aeration biological reaction pond and pipe network formula reverse osmosis unit combine, and the energy consumption is few, and area is little, and there is not outer sewage of arranging in the entire system flow, can realize the energy self-sufficiency in the processing procedure, and the product water retrieval and utilization is the recirculated cooling water moisturizing as the circulating water in factory, and dross, the mud of production carry to incineration plant burn after the dehydration, and the dense pond of system's dense water advances, send to the main factory building of incineration plant and consume.

Description

Resource recycling treatment system for leachate of waste incineration plant
Technical Field
The utility model belongs to the technical field of waste water treatment, concretely relates to resource recycle processing system of waste incineration plant filtration liquid.
Background
Along with the rapid development of Chinese economy, the living standard of residents is gradually improved, and the production amount of household garbage is also gradually increased. Landfill treatment, incineration power generation treatment and composting treatment are three main forms adopted by the end treatment of domestic garbage at the present stage, and the landfill treatment accounts for the highest proportion in the three treatment modes at present. However, the landfill mode has the defects of large occupied area and serious aging of percolate, and as time goes on, a lot of cities have fewer and fewer available sites for landfill, so that a lot of governments aim at a burning treatment mode with higher reduction degree. After the domestic garbage is fermented for 5-7 d in the storage pit, water in the garbage is drained, in addition, the garbage is stacked in the garbage storage pit environment, partial organic matters are decomposed to generate partial filtrate, and the partial filtrate form the main part of leachate of an incineration plant.
The percolate of an incineration plant has the characteristics of high organic matter concentration, good biodegradability and the like, wherein the most applied treatment methods in the current engineering are anaerobic + MBR (membrane bioreactor) + membrane system, and the most representative processes are anaerobic + MBR + NF (roll-type nanofiltration) + RO (roll-type reverse osmosis) and anaerobic + MBR + DTRO (single-stage disc tube type reverse osmosis). The clear reverse osmosis liquid is reused for production, and the nanofiltration and reverse osmosis concentrated water is reduced by a roll type ultrafiltration material membrane and a disc type reverse osmosis high-pressure membrane and is used for lime pulping and fly ash solidification.
The common characteristic of the two representative processes is that the two representative processes both comprise MBR processes, and MBR is generally formed by combining a two-stage nitrification and denitrification biochemical system and an external ultrafiltration membrane system. An aerobic nitrification system in a biochemical system of two-stage nitrification and denitrification needs blast aeration, an air blower belongs to equipment with larger power, and the single-machine operation power is between 45KW and 90 KW. In addition, the MBR system has large sludge production amount, and certain energy consumption and medicament cost are consumed for treating excess sludge. The single power of a circulating water pump in the ultrafiltration system is also more than 45KW mostly. Therefore, the MBR process has the main defects of high energy consumption and large occupied area of an MBR system, and the omission of the MBR process not only reduces the construction cost but also saves the occupied area.
Therefore, aiming at the defects of large energy consumption and large occupied area of the MBR process in the percolate treatment system of the incineration plant, research and development of a resource recycling treatment system and a treatment process with low energy consumption and small occupied area are imperative.
Disclosure of Invention
To the big, great shortcoming of area of energy consumption of MBR technology, leave out the MBR technology and not only reduce construction cost and also practiced thrift area, the utility model discloses a brand-new incineration plant leachate resource utilization processing system is developed, wherein adopts membrane aeration biological reaction pond (MABR) to carry out biochemical treatment and combines ultrafiltration device and pipe network formula reverse osmosis unit to carry out advanced treatment.
The utility model discloses there is not outer sewage of arranging in the entire system flow, and the product water retrieval and utilization is the recirculated cooling water moisturizing as the circulating water in factory, and dross, the mud that produces carry to burning the factory after the dehydration and burn, and the dense pond of system's dense water advances, delivers to the main factory building of burning the factory and dissolves.
An object of the utility model is to provide a resourceful recycle processing system of rubbish penetrant.
The utility model relates to a resource recycling treatment system of garbage penetrating fluid, which comprises a pretreatment unit, a biochemical treatment unit and a deep treatment unit which are connected in sequence; the pretreatment unit comprises a regulating tank, and a water inlet of the regulating tank is provided with a filtering device; the biochemical treatment unit comprises an anaerobic unit, a membrane aeration biological reaction tank, an aerobic tank and a secondary sedimentation tank which are connected in sequence, wherein a water outlet of the anaerobic unit is connected with a separator, and the effluent of the separator enters the membrane aeration biological reaction tank; the advanced treatment unit comprises an ultrafiltration device and a pipe network type reverse osmosis device which are connected in sequence.
In the above treatment system, the regulating tank is providedThe filtering device can be a filtering device which is common in the prior art, and preferably at least one of a filter and a grating machine; filtering the percolate by a filtering device to remove solid suspended matters, larger hairs and other impurities in the percolate; preferably, when the filtering treatment is carried out by using a grating machine, the filtering grating gaps
In the treatment system, a filter is connected between the secondary sedimentation tank and the ultrafiltration device; the effluent of the secondary sedimentation tank is treated by a filter to remove residual suspended substances and reduce the risk of pollution of a subsequent membrane system, the effluent of the filter enters an ultrafiltration device after pollutants such as suspended substances, colloid and the like are further removed by a self-cleaning filter, the suspended substances, the colloid, microorganisms and the like can be almost completely removed by the ultrafiltration device, and the effluent enters a subsequent pipe network type reverse osmosis device (STRO);
in the treatment system, the separator connected with the water outlet of the anaerobic unit is a three-phase separator, so that three-phase separation of methane, sludge and effluent is realized; a gas collecting unit is connected above the anaerobic unit, and further the gas collecting unit is connected with a biogas boiler and a torch unit; biogas generated by fermentation of the anaerobic unit enters a biogas boiler through a gas collecting system, the generated heat is supplied to the heat required by the anaerobic unit, self-sufficiency of energy is realized, and the rest biogas enters a torch unit for combustion;
in the treatment system, the effluent of the separator is filtered by a filter and enters a membrane aeration biological reaction tank;
in the treatment system, the anaerobic unit comprises a biochemical water inlet pump and an anaerobic reactor; preferably, the reaction temperature of the anaerobic reactor in the anaerobic unit is 30-35 ℃; in the anaerobic reactor, the liquefaction of organic matters is realized under the action of anaerobic microorganisms, and macromolecular substances such as proteins, fibers and the like are changed into micromolecular substances accompanied by methane and CO2The generation of isogas;
in the treatment system, the pipe network type reverse osmosis device is also connected with a reuse water pool and a concentrated water collection unit; the produced water of the pipe network type reverse osmosis device enters a reuse water pool to be reused as product water, and concentrated water enters a concentrated water pool and is sent to a main factory building of an incineration plant to be consumed;
in the treatment system, the adjusting tank, the anaerobic unit, the aerobic tank and the secondary sedimentation tank are all provided with sludge outlets and are connected with a sludge tank, and the sludge tank is connected with a sludge dewatering machine.
A resource recycling processing system of landfill leachate, the concrete equipment and device that adopt in each unit, for example but not limited to equalizing basin, anaerobism unit, membrane aeration biological reaction pond, good oxygen pond, two heavy ponds, ultrafiltration device, pipe network formula reverse osmosis unit, all can adopt existing relevant equipment and device among the prior art.
The membrane aeration biological reaction tank (MABR) is a membrane-biological treatment coupling reactor and has the characteristics of bubble-free aeration, treatment function active stratification, high oxygen utilization rate, small sludge generation amount, small volatile pollutant gas stripping loss, convenient operation and management and the like. The aeration membrane in the device mainly plays two roles: one is to provide bubble-free oxygen supply and the other is to provide a carrier for the attachment and growth of microorganisms. The aeration membrane divides the wastewater system into a gas phase part and a liquid phase part, oxygen is in the membrane, pollutants are outside the membrane, the oxygen can diffuse in different directions, the oxygen can penetrate through the aeration membrane wall to enter the biological membrane growing on the membrane liquid phase side, meanwhile, wastewater in the liquid phase enters the inner side from the outer side of the biological membrane, and the pollutants are effectively removed under the action of microorganisms on the single biological membrane;
specifically, the membrane aeration biological reaction tank preferably comprises a membrane component, an air supply device, a water inlet device and a circulating device, wherein the membrane component is arranged in the membrane aeration biological reaction tank; the air outlet of the air supply device is connected with the air inlet end of the membrane component; the circulating device is used for uniformly mixing the reaction liquid at the bottom and the upper part of the membrane aeration biological reaction tank; preferably, the concentration of dissolved oxygen in the membrane aeration biological reaction tank is 0.5-2 mg/L.
Removing residual organic matters and synchronously realizing the nitrification and denitrification process of nitrate and nitrite in the MABR tank in an enhanced mode, wherein the nitrogen content in the treated effluent is very low, the COD (chemical oxygen demand) of the wastewater is less than or equal to 400mg/L, and the ammonia nitrogen is less than or equal to 10 mg/L; and pumping the effluent of the MABR to an aerobic unit to enhance the degradation of organic matters.
Among the above-mentioned processing systems, the pipe network type reverse osmosis device (STRO) has open flow channel and unimpeded, non-turbulent water inflow system, has overcome the dirt of traditional reverse osmosis device and has blocked up and the scale deposit. The pipe network type reverse osmosis device (STRO) can reduce the concentration of inorganic salt in the wastewater, remove residual organic matters and ensure that the water quality of the effluent meets the requirement of the quality of reuse water;
particularly, the pipe network type reverse osmosis system preferably comprises a membrane component, a high-pressure pump and the like, and can further improve the water quality and the water yield recovery rate of the system.
The treatment method adopting the resource recycling treatment system for the leachate of the waste incineration plant comprises the steps of pretreating the leachate, then carrying out biochemical treatment and then carrying out advanced treatment, and specifically comprises the following steps:
step one, pretreatment: filtering the percolate of the waste incineration plant, and then feeding the effluent into a regulating tank for regulating the water quality and the water quantity to meet the balance of the water quality and the water quantity of an anaerobic unit;
step two, biochemical treatment: lifting the effluent of the regulating reservoir to an anaerobic unit through a water inlet pump, separating the effluent after anaerobic fermentation through a separator, enabling the effluent of the separator to flow to a membrane aeration biological reaction tank, realizing a nitrification and denitrification process in the membrane aeration biological reaction tank, lifting the effluent after the nitrification and denitrification process to an aerobic tank through the pump, and enabling the effluent after organic matter degradation in the aerobic tank to flow to a secondary sedimentation tank for sludge-water separation;
step three: deep treatment: and in the second step, the effluent of the secondary sedimentation tank enters an ultrafiltration device after being filtered, the effluent of the ultrafiltration device enters a pipe network type reverse osmosis device, and the treated produced water enters a reuse water tank.
In the first step of the treatment method, a grating machine or a filter is adopted for filtration treatment, and impurities such as solid suspended matters, larger hairs and the like in the percolate are removed; preferably, when the filtering treatment is carried out by using a grating machine, the filtering grating gaps
In the second step of the treatment method, the anaerobic unit is a medium-temperature anaerobic unit, the preferable reaction temperature is 30-35 ℃, the liquefaction of organic matters is realized under the action of anaerobic microorganisms, and macromolecular substances such as proteins and fibers are changed into small molecular substances accompanied by methane and CO2The generation of isogas;
in the second step of the treatment method, after the effluent after anaerobic fermentation is separated by the separator, the effluent of the separator flows to a membrane aeration biological reaction tank (MABR) after being filtered by a filter, the removal of residual organic matters and the synchronization of nitrate and nitrite are enhanced in the MABR tank to realize the nitrification and denitrification process, the nitrogen content in the treated effluent is very low, the COD (chemical oxygen demand) of the wastewater is less than or equal to 400mg/L, and the ammonia nitrogen is less than or equal to 10 mg/L; pumping the effluent of the MABR to an aerobic unit to enhance the degradation of organic matters;
in the second step of the treatment method, the separator is selected from a three-phase separator, so that three-phase separation of methane, sludge and effluent is realized;
in the second step of the treatment method, the effluent of the separator is filtered by a filter and then flows to a membrane aeration biological reaction tank, and the effluent can be filtered by a common filter in the prior art;
in the second step of the treatment method, the biogas generated by the fermentation of the anaerobic unit enters a biogas boiler through a gas collection system, the generated heat is supplied to the heat required by the anaerobic unit, the self-sufficiency of energy is realized, and the residual biogas enters a torch unit for combustion;
sludge produced by the regulating tank, the anaerobic unit, the aerobic tank and the secondary sedimentation tank in the first step or the second step of the treatment method is discharged into a sludge tank, dehydrated by a sludge dehydrator and then enters an incineration plant for incineration;
in the second step of the treatment method, the effluent of the secondary sedimentation tank is treated by a filter to remove residual suspended substances and reduce the risk of pollution of a subsequent membrane system, the effluent of the filter enters an ultrafiltration device in the third step after further removing pollutants such as suspended substances, colloids and the like by a self-cleaning filter, the suspended substances, the colloids, the microorganisms and the like can be almost completely removed by the ultrafiltration device, the effluent of the ultrafiltration device enters a pipe network type reverse osmosis device (STRO), and the device is provided with an open flow channel and an unimpeded and turbulence-free water inlet system and overcomes the pollution blockage and the scaling of the traditional reverse osmosis device.
In the third step of the treatment method, the pipe network type reverse osmosis device (STRO) can reduce the concentration of inorganic salt in the wastewater, remove residual organic matters and ensure that the quality of the effluent meets the requirement of the quality of reuse water. The produced water of the pipe network type reverse osmosis device enters a reuse water pool to be reused as product water, and concentrated water enters a concentrated water pool and is sent to a main factory building of an incineration plant to be consumed.
The utility model discloses a resource recycle processing system and processing method of waste incineration factory filtration liquid, the play water after handling can reach open-type recirculated cooling water system make-up water quality standard in the municipal sewage regeneration industry water quality of water (GB/T19923-2005), compares with prior art treatment process, has following beneficial effect simultaneously:
(1) the utility model provides a resource recycling treatment system for percolate of a refuse incineration plant, which develops a resource recycling treatment system with less energy consumption and small occupied area aiming at the development of percolate of an incineration plant;
(2) compared with the traditional MBR process, the Membrane Aeration Bioreactor (MABR) in the system has the characteristics of no-bubble aeration, active stratification of treatment function, high oxygen utilization rate, less sludge generation amount, small air stripping loss of volatile pollutants, convenient operation and management and the like; compared with the traditional treatment process, the aeration energy consumption can be reduced by 90 percent at most;
(3) the pipe network type reverse osmosis device (STRO) in the system of the utility model replaces the traditional reverse osmosis device, the device has an open flow passage and an unimpeded and turbulence-free water inlet system, and the pollution blockage and scaling of the traditional reverse osmosis device are overcome;
(4) the resource recycling treatment system for the percolate of the waste incineration plant has the characteristic of strong load impact resistance and can adapt to the fluctuation of the water flow and the water quality;
(5) the utility model provides a resource recycle processing system of waste incineration factory filtration liquid, the marsh gas of production is used for the heating of system self, can realize the energy self-sufficiency, the lowering system running cost.
Drawings
FIG. 1 is a process flow diagram of a recycling treatment system for garbage leachate according to the present invention.
Detailed Description
The present invention will be described in detail with reference to the following embodiments, and it should be understood that the following embodiments are only used for further illustration of the present invention and should not be construed as limiting the scope of the present invention, and the modifications and adjustments made by those skilled in the art according to the present invention are not essential to the present invention.
Example 1:
the following description of the drawings that combine together the utility model provides a refuse incineration plant leachate's resource recycle processing system carries out the condition handled certain incineration plant landfill leachate waste water, and waste water quality index is as shown in table 1:
table 1.
Index of pollutants Limit value
Biochemical oxygen demand BOD for five days5(mg/L) 40000
Chemical oxygen demand CODcr(mg/L) 80000
Suspended solid matter content SS (mg/L) 12000
Ammonia nitrogen content NH3-N(mg/L) 2500
Total nitrogen concentration TN (mg/L) 3000
pH 4-8
As shown in fig. 1, the resource recycling treatment system for leachate of a waste incineration plant comprises a pretreatment unit, a biochemical treatment unit and a deep treatment unit which are connected in sequence; the pretreatment unit comprises a regulating tank, and a water inlet of the regulating tank is provided with a filtering device; the biochemical treatment unit comprises an anaerobic unit, a membrane aeration biological reaction tank, an aerobic tank and a secondary sedimentation tank which are connected in sequence, wherein a water outlet of the anaerobic unit is connected with a separator, and the effluent of the separator enters the membrane aeration biological reaction tank; the advanced treatment unit comprises an ultrafiltration device and a pipe network type reverse osmosis device which are connected in sequence.
Utilize the utility model discloses a processing system is as follows to the processing flow of waste incineration factory filtration liquid:
(1) pretreatment: the percolate of the garbage incineration plant firstly enters an integrated grating machine, and a filtering grating gap of the integrated grating machineRemoving impurities such as suspended solids, larger hairs and the like in the percolate, and enabling the effluent of the grating machine to enter a comprehensive wastewater adjusting tank for adjusting the water quality and the water quantity.
(2) Biochemical treatment: the effluent of the regulating reservoir is lifted to an anaerobic unit by a biochemical water inlet pump, the anaerobic unit is a medium-temperature anaerobic unit, the reaction temperature is 30-32 ℃, the liquefaction of organic matters is realized under the action of anaerobic microorganisms, and macromolecular substances such as protein, fiber and the like are changed into micromolecular substances accompanied by methane and CO2The generation of isogas; after passing through a three-phase separator, effluent after anaerobic fermentation flows to a membrane aeration biological reaction tank (MABR) through filtration of a filter, the concentration of dissolved oxygen in the MABR tank is controlled to be 1.5mg/L, the removal of residual organic matters is enhanced, the nitrification and denitrification processes are synchronously realized by nitrate and nitrite, and the content of nitrogen in the effluent is very low; pumping the effluent of the MABR to an aerobic unit to enhance the degradation of organic matters; the effluent of the aerobic tank automatically flows into a secondary sedimentation tank to realize sludge-water separation; biogas generated by anaerobic fermentation enters a biogas boiler through a gas collecting system, and the generated heat provides heat required by the medium-temperature anaerobic unit, so that self-sufficiency of energy is realized; and the residual methane enters a torch unit for combustion.
The MABR comprises a membrane component, an air supply device, a water inlet device and a circulating device, wherein the membrane component is arranged in a membrane aeration biological reaction tank; the air outlet of the air supply device is connected with the air inlet end of the membrane component; the circulating device is used for uniformly mixing the reaction liquid at the bottom and the upper part of the membrane aeration biological reaction tank.
After biochemical treatment, the COD of the wastewater is less than or equal to 480mg/L, and the ammonia nitrogen is less than or equal to 25 mg/L.
(3) Deep treatment:
firstly, the effluent of the secondary sedimentation tank is lifted by a pump and enters a filter to remove the residual suspended substances, so that the risk of pollution of a subsequent membrane system is reduced;
then, the effluent of the filter is subjected to self-cleaning to further remove pollutants such as suspended matters, colloid and the like, and then enters an ultrafiltration device, and the device can almost completely remove the suspended matters, the colloid, microorganisms and the like. The effluent of the ultrafiltration device enters a pipe network type reverse osmosis device (STRO) which is provided with an open flow channel and an unimpeded and turbulence-free water inlet system, and the pollution blockage and scaling of the traditional reverse osmosis device are overcome. The pipe network type reverse osmosis device (STRO) can reduce the concentration of inorganic salt in the wastewater, remove residual organic matters and ensure that the quality of the outlet water meets the requirement of the quality of reuse water. The water produced by the reverse osmosis device enters a reuse water pool to be reused as product water. The concentrated water enters a concentrated water tank and is sent to a main factory building of an incineration plant for consumption.
The STRO comprises a membrane component, a high-pressure pump and the like, and can further improve the water quality and the recovery rate of the system produced water;
the effluent quality of the pipe network type reverse osmosis device (STRO) is as follows: COD is less than or equal to 60mg/L, ammonia nitrogen is less than or equal to 0.5mg/L, turbidity is less than or equal to 0.1NTU, pH value is 7.0-7.5, and effluent after leachate treatment reaches the water quality standard of make-up water for an open type circulating cooling water system in the water quality for urban sewage recycling industry (GB/T19923-2005).
Example 2:
the following description is provided with reference to the accompanying drawings, and the method of the utility model is used for treating the waste leachate waste water of a certain incineration plant, and the water quality indexes of the waste water are as shown in the following table 2:
TABLE 2
Serial number Item Unit of Index of leachate inflow in incineration plant
1 pH 4.0-6.3
2 SS mg/L 15000
3 CODcr mg/L 60000
4 BOD5 mg/L 35000
5 Ammonia nitrogen mg/L 2500
6 Total nitrogen mg/L 3000
7 Total dissolved solids concentration TDS mg/L 12500
8 Chloride ion mg/L 3750
As shown in fig. 1, the resource recycling treatment system for leachate of a waste incineration plant comprises a pretreatment unit, a biochemical treatment unit and a deep treatment unit which are connected in sequence; the pretreatment unit comprises a regulating tank, and a water inlet of the regulating tank is provided with a filtering device; the biochemical treatment unit comprises an anaerobic unit, a membrane aeration biological reaction tank, an aerobic tank and a secondary sedimentation tank which are connected in sequence, wherein a water outlet of the anaerobic unit is connected with a separator, and the effluent of the separator enters the membrane aeration biological reaction tank; the advanced treatment unit comprises an ultrafiltration device and a pipe network type reverse osmosis device which are connected in sequence.
Utilize the utility model discloses a processing system is as follows to the processing flow of waste incineration factory filtration liquid:
(1) pretreatment: the percolate of the waste incineration plant firstly enters a basket filter, and a filtering grid gap of the basket filterRemoving impurities such as suspended solids, larger hairs and the like in the percolate, and enabling the outlet water of the filter to enter a comprehensive wastewater adjusting tank for adjusting the water quality and the water quantity.
After the pretreatment, the adjusting tank discharges water: COD is less than or equal to 54000 mg/L.
(2) Biochemical treatment: the effluent of the regulating reservoir is lifted to an anaerobic unit by a biochemical water inlet pump, the anaerobic unit is a medium-temperature anaerobic unit, the reaction temperature is 33-35 ℃, the liquefaction of organic matters is realized under the action of anaerobic microorganisms, macromolecular substances such as protein, fiber and the like are changed into micromolecular substances accompanied by methane and CO2The generation of isogas; after passing through a three-phase separator, effluent after anaerobic fermentation flows to a membrane aeration biological reaction tank (MABR) through filter filtration, the concentration of dissolved oxygen in the MABR tank is controlled to be 0.5-2mg/L to enhance the removal of residual organic matters, nitrate and nitrite synchronously realize the nitrification and denitrification process, and the nitrogen content in the effluent is very low; pumping the effluent of the MABR to an aerobic unit to enhance the degradation of organic matters; the effluent of the aerobic tank automatically flows into a secondary sedimentation tank to realize sludge-water separation; biogas generated by anaerobic fermentation enters a biogas boiler through a gas collecting system, and the generated heat provides heat required by the medium-temperature anaerobic unit, so that self-sufficiency of energy is realized; and the residual methane enters a torch unit for combustion.
The MABR comprises a membrane component, an air supply device, a water inlet device and a circulating device, wherein the membrane component is arranged in a membrane aeration biological reaction tank; the air outlet of the air supply device is connected with the air inlet end of the membrane component; the circulating device is used for uniformly mixing the reaction liquid at the bottom and the upper part of the membrane aeration biological reaction tank.
After biochemical treatment, the COD of the wastewater is less than or equal to 405mg/L, and the ammonia nitrogen is less than or equal to 7.5 mg/L.
(3) Deep treatment:
firstly, the effluent of the secondary sedimentation tank is lifted by a pump and enters a filter to remove residual suspended substances, so that the risk of pollution of a subsequent membrane system is reduced.
Then, the effluent of the filter is subjected to self-cleaning to further remove pollutants such as suspended matters, colloid and the like and then enters an ultrafiltration device, and the ultrafiltration device can almost completely remove the suspended matters, the colloid, the microorganisms and the like. The effluent of the ultrafiltration device enters a pipe network type reverse osmosis device (STRO) which is provided with an open flow channel and an unimpeded and turbulence-free water inlet system, and the pollution blockage and scaling of the traditional reverse osmosis device are overcome. The pipe network type reverse osmosis device (STRO) can reduce the concentration of inorganic salt in the wastewater, remove residual organic matters and ensure that the quality of the outlet water meets the requirement of the quality of reuse water. The water produced by the reverse osmosis device enters a reuse water pool to be reused as product water. The concentrated water enters a concentrated water tank and is sent to a main factory building of an incineration plant for consumption.
The STRO comprises a membrane component, a high-pressure pump and the like, and can further improve the water quality and the recovery rate of the system produced water;
the effluent quality of the pipe network type reverse osmosis device (STRO) is as follows: COD is less than or equal to 50mg/L, ammonia nitrogen is less than or equal to 2.5mg/L, turbidity is less than or equal to 0.1NTU, pH value is 7.0-7.5, and effluent after leachate treatment reaches the water quality standard of make-up water for an open type circulating cooling water system in the water quality for urban sewage recycling industry (GB/T19923-2005).
From this, adopt the utility model provides a resource recycle processing system of waste incineration plant filtration liquid, the play water after handling can reach open-type recirculated cooling water system make-up water quality standard among "urban sewage regeneration utilizes industrial water quality of water" (GB/T19923-2005), simultaneously, the utility model provides a resource recycle processing system of waste incineration plant filtration liquid compares with traditional processing system, and the aeration energy consumption can reduce 90% at most, and the energy consumption is few, area is little, does not have outer sewage of arranging in the entire system flow, and the product water recycling is circulating cooling water moisturizing as the circulating water in factory, and dross, the mud of production are carried to the incineration plant after the dehydration and are burnt, and the dense pond of system advances, send to the main building absorption of incineration plant.

Claims (10)

1. A resource recycling treatment system for penetrating fluid of a waste incineration plant comprises a pretreatment unit, a biochemical treatment unit and a deep treatment unit which are connected in sequence; the pretreatment unit comprises a regulating tank, and a water inlet of the regulating tank is provided with a filtering device; the biochemical treatment unit comprises an anaerobic unit, a membrane aeration biological reaction tank, an aerobic tank and a secondary sedimentation tank which are connected in sequence, wherein a water outlet of the anaerobic unit is connected with a separator, and the effluent of the separator enters the membrane aeration biological reaction tank; the advanced treatment unit comprises an ultrafiltration device and a pipe network type reverse osmosis device which are connected in sequence.
2. The treatment system of claim 1, wherein the filtering device provided at the inlet of the regulating reservoir is at least one of a filter and a grating machine.
3. The treatment system of claim 1, wherein a filter is connected between the secondary sedimentation tank and the ultrafiltration device.
4. The process system of claim 1, wherein the separator is a three-phase separator.
5. A treatment system as claimed in claim 1, wherein the effluent of the separator is filtered through a filter into a membrane-aerated bioreactor tank.
6. The treatment system of claim 1, wherein a reuse water basin and a concentrate collection unit are further connected to the pipe-grid reverse osmosis apparatus.
7. The treatment system according to claim 1, wherein the conditioning tank, the anaerobic unit, the aerobic tank and the secondary sedimentation tank are provided with sludge outlets and connected with a sludge tank, and the sludge tank is connected with a sludge dewatering machine.
8. The processing system of claim 1,
the anaerobic unit comprises a biochemical water inlet pump and an anaerobic reactor; and/or the presence of a gas in the gas,
and a gas collecting unit is connected above the anaerobic unit.
9. The treatment system of claim 8, wherein a biogas boiler and a flare unit are connected to the gas collection unit of the anaerobic unit.
10. The processing system of claim 1,
the membrane aeration biological reaction tank comprises a membrane component, an air supply device, a water inlet device and a circulating device, wherein the membrane component is arranged in the membrane aeration biological reaction tank; the air outlet of the air supply device is connected with the air inlet end of the membrane component; the circulating device is used for uniformly mixing the reaction liquid at the bottom and the upper part of the membrane aeration biological reaction tank.
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