CN216614249U - Container formula landfill leachate membrane concentrate processing system - Google Patents
Container formula landfill leachate membrane concentrate processing system Download PDFInfo
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- CN216614249U CN216614249U CN202120504935.9U CN202120504935U CN216614249U CN 216614249 U CN216614249 U CN 216614249U CN 202120504935 U CN202120504935 U CN 202120504935U CN 216614249 U CN216614249 U CN 216614249U
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Abstract
A container type landfill leachate membrane concentrated solution treatment system comprises a nanofiltration system, a water tank, a dosing system, a PLC control system, a valve and a remote treatment system which are integrated in a container. According to the utility model, the water tank, the dosing system, the nanofiltration system, the PLC control system, the remote control system and the remote monitoring system are integrated in the container, so that the reduction and recovery of the garbage percolation membrane concentrated solution can be completed without a civil engineering plant, and the manufacturing cost is low; the nanofiltration system is provided with a booster pump and a circulating pump, the operating pressure is controlled to be 2-25 bar, and compared with the prior art, the operating pressure is obviously reduced. Meanwhile, the PLC control system, the remote control system and the remote monitoring system are arranged, so that the decrement recovery of the garbage infiltration membrane concentrated solution can be automatically completed, the watching by a specially-assigned person is not needed, and the remote control capability of 24-hour full-day operation is realized.
Description
Technical Field
The utility model belongs to the technical field of landfill leachate treatment, and relates to a container type landfill leachate membrane concentrated solution treatment system.
Background
The landfill leachate membrane concentrated solution is a concentrated solution left after the landfill leachate is subjected to biodegradation and then is subjected to concentration treatment by a reverse osmosis membrane or a nanofiltration membrane. It is mainly made of refractory organic matter and high-valence salt, and is brownish black. If the filtered concentrated solution containing a large amount of pollutants is directly discharged without being treated, surface water, underground water, soil environment, living organisms and the like are greatly threatened, and the whole ecological system is damaged.
In order to protect the ecosystem, the landfill leachate membrane concentrate needs to be further processed. At present, the landfill leachate membrane concentrated solution is mainly subjected to a decrement recovery mode, the decrement recovery method comprises an advanced oxidation method, an evaporation method and a membrane separation method, the advanced oxidation method can remove organic matters in the landfill leachate membrane concentrated solution with high efficiency, but water resources in the landfill leachate membrane concentrated solution after treatment cannot be directly recovered, and the landfill leachate membrane concentrated solution can reach the recovery standard after further treatment; the evaporation method has high energy consumption and low efficiency, is mainly applied to the hazardous wastewater industry, and other types of wastewater rarely adopt the method to treat the landfill leachate membrane concentrated solution; the membrane separation method can be divided into a reverse osmosis method, a nanofiltration method, an ultrafiltration method, a microfiltration method and the like, the method can efficiently intercept inorganic pollutants and organic pollutants in sewage, water resources in the treated garbage leachate membrane concentrated solution can be directly recovered and discharged, and compared with an advanced oxidation method and an evaporation method, the membrane separation method has stronger universality and higher water resource recovery rate, and is a common and environment-friendly treatment mode.
The method is characterized in that equipment and a factory building are needed to finish the decrement recovery of the landfill leachate membrane concentrated solution by using an advanced oxidation method, an evaporation method or a membrane separation method, and specifically comprises the following steps: the method comprises the steps of building a workshop by civil engineering, then installing various devices required by garbage treatment to form a garbage treatment system, and utilizing the garbage treatment system to reduce and recycle garbage leachate membrane concentrated solution in the workshop. The garbage treatment system has the following three problems, namely, the first problem is that the garbage leachate is high in organic matter and salt content, high osmotic pressure is easily generated, the equipment needs to have enough pressure to resist the osmotic pressure, and therefore, water molecules, monovalent salt and small molecular organic matter need to be squeezed to the dialysate side from the concentrate side by extra pressure, so that the operation pressure of the equipment is high, the loss of the equipment is accelerated after long-term use, and the service life and the safety factor of the equipment are influenced; the second problem is that the civil engineering plant needs to invest in large manpower and material resources, the construction time is long, and the cost is high; the third problem is that the construction is used as a fixed device, a specially-assigned person is needed to watch, and the watching personnel works in the environment for a long time, so that negative effects are caused to the body.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a container type landfill leachate membrane concentrated solution treatment system which can realize decrement recovery of landfill leachate membrane concentrated solution and has the advantages of low manufacturing cost, no need of special personnel on duty and low operation pressure.
In order to achieve the above purpose, the solution of the utility model is:
a container type landfill leachate membrane concentrated solution treatment system comprises a nanofiltration system, a water tank, a dosing system, a PLC control system, a valve and a remote treatment system which are integrated in a container;
the nanofiltration system is divided into a primary nanofiltration system and a secondary nanofiltration system, a booster pump and a circulating pump which can adjust the operation pressure of the system are arranged in each nanofiltration system, and the nanofiltration system is connected to the dosing system and the water tank through a valve and a pump which can adjust the flow;
the water tank comprises a raw water tank, a cleaning tank and a water production tank, wherein the raw water tank can store garbage leachate membrane concentrated solution and water produced by the nanofiltration system, a water outlet of the raw water tank is communicated with a water inlet of the primary nanofiltration system through a pipeline, the cleaning tank stores cleaning water provided for the nanofiltration system and water produced by the nanofiltration system, the cleaning tank is respectively communicated with a concentrated solution outlet and a dialysate outlet of the nanofiltration system through pipelines, and the water production tank stores dialysate produced by the primary nanofiltration system and is communicated with a dialysate outlet of the primary nanofiltration system through a pipeline;
a dosing system capable of adding acid and scale inhibitor is arranged between the raw water tank and the primary nanofiltration system;
the PLC control system controls the operation and on-line cleaning of the primary nanofiltration system and the secondary nanofiltration system, and can also adjust the flow of the valve; the PLC control system comprises a power supply access end, a control panel and a frequency converter, and after the power supply access end is connected with a power supply, the control panel and the frequency converter are used for controlling the operation of the nanofiltration system and the adjustment of the flow of the valve;
the remote processing system can be networked to monitor the operation of the equipment in the container and adjust the parameters of the equipment in the container.
Further, the booster pump divide into one-level booster pump and second grade booster pump, and the circulating pump divide into one-level circulating pump and second grade circulating pump, and one-level booster pump and one-level circulating pump set up and adjust the operating pressure that one-level was received the filtration system in one-level receiving the filtration system, and second grade booster pump and second grade circulating pump set up and adjust the operating pressure that second grade was received the filtration system in second grade receiving the filtration system.
The system comprises a primary nanofiltration system, a primary safety filter, a primary booster pump, a primary circulating pump, a primary nanofiltration membrane stack, a flow regulating valve and a PLC control system, wherein the primary nanofiltration system comprises a primary feed pump for feeding the primary nanofiltration system, the primary safety filter is used for intercepting suspended matters in the garbage leachate membrane concentrated solution, the primary nanofiltration system also comprises the primary nanofiltration membrane stack for intercepting organic matters and high-valence salts in the garbage leachate membrane concentrated solution by taking fluid pressure as power, the primary feed pump is sequentially connected with the primary safety filter, the primary booster pump, the primary circulating pump and the primary nanofiltration membrane stack through pipelines, a feed inlet of the primary feed pump is communicated with a water outlet of a raw water tank through a pipeline, the communicating pipeline is provided with the flow regulating valve, and the regulating valve is in signal connection with the PLC control system; under the feeding of the first-level material conveying pump, the first-level nanofiltration membrane stack and the first-level security filter complete one-time decrement of the landfill leachate membrane concentrated solution through the operating pressure provided by the first-level booster pump and the operating flow provided by the first-level circulating pump, and after the one-time decrement, the landfill leachate membrane concentrated solution is treated into one-time re-concentrated solution and one-time dialysate.
Further, the primary nanofiltration membrane stack is provided with a primary re-concentrated solution outlet and a primary dialysate outlet; the water outlet of the primary re-concentrated solution is connected to 4 positions, one of the positions is connected to the raw water tank through a first water return valve, so that the primary re-concentrated solution can flow back to the raw water tank, the other position is connected to the concentrated solution storage tank through a first discharge valve for subsequent treatment, the third position is connected to the cleaning tank through a first cleaning valve, and the fourth position is connected to a pipeline between the primary circulating pump and the primary booster pump through a first return valve, so that the internal circulating flow of the equipment is improved; the primary dialysate water outlet is connected to 2 positions, wherein one position is connected to the water production tank through the first water production valve, and the other position is connected to the cleaning tank through the second cleaning valve; and the recycling of the primary reconcentration liquid and the primary dialysate is finished through the primary reconcentration liquid outlet and the primary dialysate liquid outlet.
The second-stage nanofiltration system comprises a second-stage material delivery pump for supplying materials to the second-stage nanofiltration system, a second-stage security filter for intercepting suspended matters in the primary re-concentrated solution, a second-stage nanofiltration membrane stack for intercepting organic matters and high-valence salts in the primary re-concentrated solution by taking fluid pressure as power, the second-stage material delivery pump is sequentially connected with the second-stage security filter, the second-stage booster pump, the second-stage circulating pump and the second-stage nanofiltration membrane stack through pipelines, a feed inlet of the second-stage material delivery pump is communicated with a water outlet of the water production tank through a pipeline, a flow regulating valve is arranged on the communicated pipeline, and the regulating valve is in signal connection with the PLC control system; under the feeding of the second-stage delivery pump, the second-stage nanofiltration membrane stack and the second-stage security filter complete the secondary decrement of the landfill leachate membrane concentrated solution through the operating pressure provided by the second-stage booster pump and the operating flow provided by the second-stage circulating pump, and after the secondary decrement, the landfill leachate membrane concentrated solution is treated into secondary reconcentrated solution and secondary dialysate.
Further, the secondary nanofiltration membrane stack is provided with a secondary re-concentrated solution water outlet and a secondary dialysate water outlet; the water outlet of the secondary re-concentrated solution is connected to four positions, wherein the water outlet of the secondary re-concentrated solution is connected to the raw water tank through a second water return valve to enable the secondary re-concentrated solution to flow back to the raw water tank; the secondary dialysate water outlet is connected to two positions, one is connected to the outside of the system through a second water producing valve, the secondary dialysate water outlet is directly discharged out of the system, and the other is connected to a cleaning tank through a fourth cleaning valve and used as cleaning water. And the secondary re-concentrated solution and the secondary dialysate are recycled through the secondary re-concentrated solution outlet and the secondary dialysate outlet.
Furthermore, the dosing system comprises an acid tank and a scale inhibitor tank, wherein the acid tank and the scale inhibitor tank are connected to a pipeline between the raw water tank and the first delivery pump through a metering pump, acid and the scale inhibitor are respectively added into the acid tank and the scale inhibitor tank through a dosing pump, and the acid and the scale inhibitor enter the primary nanofiltration system through a water inlet of the primary delivery pump to feed the primary nanofiltration system with the acid and the scale inhibitor, so that the scaling phenomenon is prevented.
Furthermore, the lower end of the cleaning tank is provided with a water outlet which is connected to two positions, wherein the water outlet is connected to a pipeline between the raw water tank and the primary delivery pump through a first water supplementing valve to provide cleaning water for the primary nanofiltration system, and the water outlet is connected to a pipeline between the secondary delivery pump and the secondary delivery pump through a second water supplementing valve to provide cleaning water for the secondary nanofiltration system.
Furthermore, the remote processing system consists of a remote control system and a remote monitoring system, the remote control system comprises a field state display device, a signal sending device and a signal sensor, the signal sending device sends a signal, the signal sensor receives the signal and transmits the received signal to the field state display device, and the remote control system adjusts the operation parameters of the equipment through the signal fed back by the field state display device and is used for adapting to the operation of the equipment under different water quality and water quantity; the remote monitoring system comprises a monitoring probe, a signal sending device and a power supply, wherein the signal sending device sends a signal received by the monitoring probe to the remote monitoring system, and the monitoring system can monitor the running condition of equipment in real time and send an alarm to the abnormal condition on site.
Furthermore, an air conditioning system is integrated in the container and comprises an air conditioner on-hook unit and an outdoor unit, and the air conditioning system can adjust the air temperature in the container to a relatively proper range, so that the equipment can operate in high-temperature summer and cold winter.
The utility model has the following advantages:
the utility model is provided with a nanofiltration system, wherein a booster pump and a circulating pump are arranged in the nanofiltration system, and the operating pressure of the system is reduced by adjusting the operating frequency of the booster pump and the circulating pump; the container is internally provided with a valve, the flow of the valve can be adjusted, the operating pressure of the landfill leachate membrane concentrated solution can be reduced by adjusting the flow of the valve, the operating pressure is controlled to be 2bar-25bar, compared with the prior art, the operating pressure is obviously reduced, and the service life of equipment is longer.
The water tank, the dosing system, the nanofiltration system, the PLC control system, the remote control system and the remote monitoring system are integrated in the container, so that the reduction and recovery of the garbage infiltration membrane concentrated solution can be finished without a civil building, and the manufacturing cost is low.
The device is provided with a PLC control system, a remote control system and a remote monitoring system, wherein the PLC control system controls the operation and on-line cleaning of the primary nanofiltration system and the secondary nanofiltration system, and can also adjust the flow of a valve; the remote monitoring system can monitor the operation condition of the equipment in the container; the remote control system can adjust the equipment parameters in the container, and can automatically complete the decrement recovery of the garbage infiltration membrane concentrated solution by means of the control of the PLC control system, the remote control system and the monitoring of the remote monitoring system, so that a specially-assigned person is not needed, and the remote control system has the 24h full-day operation remote control capability.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of the system operation of the present invention;
fig. 2 is a working principle diagram of the present invention.
Detailed Description
As shown in fig. 1 to 2, a container type landfill leachate membrane concentrated solution treatment system comprises a nanofiltration system, a water tank, a dosing system, a PLC control system, a valve and a remote treatment system which are integrated in a container; the nanofiltration system is divided into a primary nanofiltration system M1 and a secondary nanofiltration system M2, each nanofiltration system is provided with a booster pump and a circulating pump which can adjust the operating pressure of the system, and the nanofiltration system is connected to a dosing system and a water tank through a valve and a pump which can adjust the flow; the water tank comprises a raw water tank G1, a cleaning tank G2 and a water production tank G3, the raw water tank G1 can store garbage leachate membrane concentrated solution and water produced by the nanofiltration system, a water outlet of the raw water tank G1 is communicated with a water inlet of the primary nanofiltration system M1 through a pipeline, the cleaning tank G2 stores cleaning water provided for the nanofiltration system and water produced by the nanofiltration system, the cleaning tank G2 is respectively communicated with a concentrated solution liquid outlet and a dialysate liquid outlet of the nanofiltration system through pipelines, the water production tank G3 stores dialysate produced by the primary nanofiltration system, and is communicated with a dialysate liquid outlet of the primary nanofiltration system M1 through a pipeline; a dosing system which can be added with acid and scale inhibitor is arranged between the raw water tank G1 and the primary nanofiltration system M1; the PLC control system controls the operation and on-line cleaning of the primary nanofiltration system M1 and the secondary nanofiltration system M2, and can also adjust the flow of the valve; the PLC control system comprises a power supply access end, a control panel and a frequency converter, and after the power supply access end is accessed to a power supply, the control panel and the frequency converter control the operation of the nanofiltration system and the adjustment of the valve flow; the remote processing system can be networked to monitor the operation of the equipment in the container and adjust the parameters of the equipment in the container.
The booster pump is divided into a first-stage booster pump B12 and a second-stage booster pump B22, the circulating pump is divided into a first-stage circulating pump B13 and a second-stage circulating pump B23, a first-stage booster pump B12 and a first-stage circulating pump B13 are arranged in the first-stage nanofiltration system M1 to adjust the operation pressure of the first-stage nanofiltration system M1, and a second-stage booster pump B22 and a second-stage circulating pump B23 are arranged in the second-stage nanofiltration system M2 to adjust the operation pressure of the second-stage nanofiltration system.
The first-stage nanofiltration system M1 comprises a first-stage feed pump B11 for feeding a first-stage nanofiltration system M1, a first-stage security filter A11 for intercepting suspended matters in the garbage leachate membrane concentrated solution, the first-stage nanofiltration system M1 further comprises a first-stage nanofiltration membrane stack M11 for intercepting organic matters and high-valence salts in the garbage leachate membrane concentrated solution by taking fluid pressure as power, a first-stage feed pump B11 is sequentially connected with the first-stage security filter A11, a first-stage booster pump B12, a first-stage circulating pump B13 and the first-stage nanofiltration membrane stack M11 through pipelines, a feed inlet of a first-stage feed pump B11 is communicated with a water outlet of a raw water tank G1 through a pipeline, a flow regulating valve J11 is arranged on the communicated pipeline, and the regulating valve J11 is in signal connection with a PLC control system; under the feeding of a first-stage material conveying pump B11, the first-stage nanofiltration membrane stack M11 and the first-stage security filter A11 finish the primary decrement of the garbage leachate membrane concentrated solution through the operating pressure provided by a first-stage booster pump B12 and the operating flow provided by a first-stage circulating pump B13, and after the primary decrement, the garbage leachate membrane concentrated solution is treated into a primary reconcentrated solution and a primary dialysate.
The primary nanofiltration membrane stack M11 is provided with a primary re-concentrated solution outlet M111 and a primary dialysate outlet M112; a primary re-concentrated solution outlet M111 is connected to 4 positions, wherein one position is connected to a raw water tank G1 through a first water return valve N11, so that primary re-concentrated solution can flow back to a raw water tank G1, the other position is connected to a concentrated solution storage pool NC1 through a first discharge valve N13 for subsequent treatment, the third position is connected to a cleaning tank G2 through a first cleaning valve Q5, and the fourth position is connected to a pipeline between a primary circulating pump B12 and a primary booster pump B13 through a first return valve X11, so that the circulation flow in the equipment is improved; the primary dialysate outlet M112 is connected to 2 positions, one of which is connected to the water producing tank G3 through the first water producing valve C11, and the other of which is connected to the cleaning tank G2 through the second cleaning valve Q4; the recycling of the primary reconcentration liquid and the primary dialysate is finished through the primary reconcentration liquid outlet M111 and the primary dialysate liquid outlet M112.
The second-stage nanofiltration system M2 comprises a second-stage feed pump B21 for feeding a second-stage nanofiltration system M2 and a second-stage security filter A21 for intercepting suspended matters in the primary reconcentrated liquid, the second-stage nanofiltration system M2 further comprises a second-stage nanofiltration membrane stack M21 for intercepting organic matters and high-valence salts in the primary reconcentrated liquid by taking fluid pressure as power, the second-stage feed pump B21 is sequentially connected with the second-stage security filter A21, a second-stage booster pump B22, a second-stage circulating pump B23 and the second-stage nanofiltration membrane stack M21 through pipelines, a feed inlet of a second-stage feed pump B21 is communicated with a water outlet of a water production tank G3 through a pipeline, a flow regulating valve J21 is arranged on the communicated pipeline, and a regulating valve J21 is in signal connection with a PLC control system; under the feeding of a secondary material conveying pump B21, secondary decrement of the garbage leachate membrane concentrated solution is completed by a secondary nanofiltration membrane stack M21 and a secondary security filter A21 through the operating pressure provided by a secondary booster pump B22 and the operating flow provided by a secondary circulating pump B23, and after the secondary decrement, the garbage leachate membrane concentrated solution is treated into secondary reconcentrated solution and secondary dialysate.
The secondary nanofiltration membrane stack M21 is provided with a secondary re-concentrated solution water outlet M211 and a secondary dialysate water outlet M212; a secondary re-concentrated solution outlet M211 is connected to four positions, wherein one position is connected to a raw water tank G1 through a second water return valve N23, so that secondary re-concentrated solution flows back to a raw water tank G1, the other position is connected to a concentrated solution storage pool NC2 through a second drain valve N24, the other position is connected to a cleaning tank G2 through a third cleaning valve Q7, and the fourth position is connected to a pipeline between a secondary circulating pump B22 and a secondary booster pump B23 through a second return valve X21, so that secondary re-concentrated solution flows back to a secondary circulating pump B23, and the internal circulating flow is improved; the secondary dialysate outlet M212 is connected to two positions, one of which is connected to the outside of the system through a second water production valve C21, and the secondary dialysate outlet M212 is directly discharged out of the system, and the other of which is connected to a cleaning tank G2 through a fourth cleaning valve Q6, and used as cleaning water. And the secondary re-concentrated solution and the secondary dialysate are recycled through a secondary re-concentrated solution outlet M211 and a secondary dialysate outlet M212.
The dosing system comprises an acid tank S and a scale inhibitor tank Z, wherein the acid tank S and the scale inhibitor tank Z are connected to a pipeline between a raw water tank G1 and a first material conveying pump B11 through a metering pump B01, acid and a scale inhibitor are respectively added to the acid tank S and the scale inhibitor tank Z through a dosing pump B02, the acid and the scale inhibitor enter a primary nanofiltration system M1 through a water inlet of a primary material conveying pump B11 to dose to the primary nanofiltration system M1, and the scale formation phenomenon is prevented.
The lower end of the cleaning tank G2 is provided with a water outlet G21, a water outlet G21 is connected to two positions, one position is connected to a pipeline between a raw water tank G1 and a primary feed pump B11 through a first water replenishing valve Q2 to supply cleaning water to the primary nanofiltration system M1, and the other position is connected to a pipeline between a secondary feed pump B21 and a secondary feed pump B21 through a second water replenishing valve Q3 to supply cleaning water to the secondary nanofiltration system M2.
The remote processing system consists of a remote control system and a remote monitoring system, wherein the remote control system comprises a field state display device, a signal sending device and a signal sensor, the signal sending device sends a signal, the signal sensor receives the signal and transmits the received signal to the field state display device, and the remote control system adjusts equipment operation parameters through the signal fed back by the field state display device and is used for adapting to the operation of equipment with different water qualities and water quantities; the remote monitoring system comprises a monitoring probe, a signal sending device and a power supply, wherein the signal sending device sends a signal received by the monitoring probe to the remote monitoring system, and the monitoring system can monitor the running condition of equipment in real time and send an alarm to the abnormal condition on site.
An air conditioning system is integrated in the container and comprises an air conditioner hanging machine and an outdoor unit, and the air conditioning system can adjust the air temperature in the container to a relatively proper range, so that the equipment can operate in high-temperature summer and cold winter.
The utility model adopts a two-stage nanofiltration treatment system to treat the garbage leachate membrane concentrated solution, can achieve the purpose of reducing and recovering the garbage leachate membrane concentrated solution, and can control the total recovery rate of water to be more than 70 percent by recovering the garbage leachate membrane treated by the nanofiltration system, wherein the calculation formula of the water recovery rate is the flow rate of a secondary nanofiltration dialysate/(the flow rate of a primary nanofiltration concentrated solution and the flow rate of a secondary nanofiltration dialysate) × 100 percent.
When the system works, the operating pressure of the system can be adjusted by adjusting the operating frequency of the booster pump and the circulating pump, and the system pressure is increased when the frequency is increased. The first-stage nanofiltration system M1 and the second-stage nanofiltration system M2 are respectively provided with a first stop valve N12 and a second stop valve N22 at outlets to adjust the flow entering the membrane system, have a certain effect on adjusting the system pressure, but mainly have the effect of adjusting the system flow, and the system pressure is controlled to be 2bar-25bar by means of a booster pump, a circulating pump and the stop valves.
The water tank, the dosing system, the nanofiltration system, the PLC control system, the remote processing system and the air conditioning system are integrated in the container to form a compact and reasonable process system whole body, a factory building is not required to be built, the manufacturing cost is low, and a 24-hour specially-assigned person is not required to watch.
When the utility model works, the decrement recovery flow of the garbage leachate membrane concentrated solution is as follows:
the method comprises the following steps: adding the landfill leachate membrane concentrated solution;
the feed inlet and the water inlet above the raw water tank G1 are opened, and untreated garbage leachate membrane concentrated solution and cleaning water are injected into the raw water tank G1 through the feed inlet and the water inlet.
Step two: reducing the landfill leachate membrane concentrated solution for one time;
a PLC control system is started to control a first-stage nanofiltration concentration system M1 to inject cleaning water for operation; then, starting a dosing pump B02 to respectively add acid and scale inhibitor into the acid tank S and the scale inhibitor tank Z, wherein the acid and the scale inhibitor flow along with the water flow direction, and then enter a first-stage nanofiltration concentration system M1 to react with the leachate membrane concentrated solution; under the support of power provided by a first-stage delivery pump B11, enabling the garbage leachate membrane concentrated solution and cleaning water to enter a first-stage cartridge filter A11, and intercepting suspended matters in the garbage leachate membrane concentrated solution by the first-stage cartridge filter A11; and then, under the power provided by a first-stage booster pump B12 and the circulation flow provided by a first-stage circulating pump B13, the garbage leachate membrane concentrated solution enters a first-stage nanofiltration membrane stack M11, 4 special nanofiltration membranes are arranged in the first-stage nanofiltration membrane stack M11, the 4 special nanofiltration membranes can intercept organic matters and high-valence salts in the garbage leachate membrane concentrated solution, and the garbage leachate membrane concentrated solution is treated by a first-stage security filter A11 and a first-stage nanofiltration membrane stack M11 to achieve the purpose of primary decrement. And after the primary decrement treatment is finished, primary re-concentrated solution and primary dialysate are generated. Wherein, the primary booster pump B12 provides the separation power of the primary nanofiltration system M1 and is the main pressure source of the membrane concentration system; the primary circulating pump B13 has high flow rate and low pressure, and mainly aims to provide a membrane module with a larger membrane surface flow rate, improve turbulence, and relieve membrane core pollution caused by concentration polarization, in addition, the addition amount of acid and scale inhibitor is adjusted according to the water quality of cleaning water, and the addition of acid and scale inhibitor can inhibit scaling phenomenon in the operation process of landfill leachate, maintain the flux stability of a primary nanofiltration concentration system M1, and reduce the cleaning frequency of the membrane concentration system.
Step three: recovering the primary reconcentration solution and the primary dialysate;
the primary re-concentrated solution after primary decrement flows out from four outlets to be recycled: the first one, connect to the raw water tank G1 through the first return valve N11, make the primary reconcentration liquid can flow back to raw water tank G1, its second, connect to the concentrated solution storage tank NC1 through the first discharge valve N13, in order to process subsequently, its third, connect to the purge tank G2 through the first purge valve Q5, its fourth, connect to the pipeline between first-class circulating pump B12 and first-class booster pump B13 through the first return valve X11, improve the flow of circulation in the apparatus; the primary dialysate flows to the two branch ports through the primary dialysate outlet M112 to be recovered: the first one is connected to a water production tank G3 through a first water production valve C11, the recovered primary dialysate is used as the cleaning water of a secondary nanofiltration system M2, the second one is connected to a cleaning tank G2 through a second cleaning valve Q4, and the recovered primary dialysate is used as the cleaning water of the nanofiltration system.
Step four: secondary decrement of landfill leachate membrane concentrated solution;
the PLC control system is started to control the secondary nanofiltration concentration system M2, under the power support provided by a secondary delivery pump B21, primary re-concentrated liquid and cleaning water enter a secondary security filter A21, the secondary security filter A21 intercepts suspended matters in the primary re-concentrated liquid, then, under the power support provided by a secondary booster pump B22 and a secondary circulating pump B23, the primary re-concentrated liquid enters a secondary nanofiltration membrane stack M21, the secondary nanofiltration membrane stack M21 also has 4 special nanofiltration membranes, the 4 special nanofiltration membranes can intercept organic matters and high-valence salts in the primary re-concentrated liquid, secondary decrement treatment of the garbage leachate membrane concentrated liquid is completed through the treatment of the secondary security filter A21 and the secondary nanofiltration membrane stack M21, and secondary re-concentrated liquid and secondary dialysate are generated after the secondary decrement treatment is completed. Wherein, the secondary booster pump B22 provides the separation power of the secondary nanofiltration system M2 and is the main pressure source of the membrane concentration system; the secondary circulating pump B23 has high flow rate and low pressure, and is mainly used for providing larger membrane surface flow velocity for the membrane component, improving turbulence and relieving membrane core pollution caused by concentration polarization.
Step five: recovering secondary re-concentrated solution and secondary dialyzate;
and the secondary re-concentrated solution after secondary decrement flows to four branch ports to be recovered: the first is connected to a raw water tank G1 through a second water return valve N23, so that secondary re-concentrated solution flows back to a raw water tank G1, the second is connected to a concentrated solution storage pool NC2 through a second external discharge valve N24, the third is connected to a cleaning tank G2 through a third cleaning valve Q7, and the fourth is connected to a pipeline between a secondary circulating pump B22 and a secondary booster pump B23 through a second return valve X21, so that the secondary re-concentrated solution flows back to a secondary circulating pump B23, and the internal circulation flow is improved; the secondary dialysate flows to the two branch ports through a secondary dialysate outlet M212 to be recovered and discharged: the first one is connected to the outside of the system through a second water producing valve C21, the secondary dialysate of which the secondary dialysate outlet M212 meets the discharge standard can be directly discharged out of the system, the second one is connected to a cleaning tank G2 through a fourth cleaning valve Q6, and the recovered secondary dialysate is used as the cleaning water of the nanofiltration system.
The above description is only an embodiment of the present invention, but the design concept of the present invention is not limited thereto, and the insubstantial modifications of the present invention using the design concept fall within the protection scope of the present invention.
Claims (10)
1. A container type landfill leachate membrane concentrated solution treatment system is characterized by comprising a nanofiltration system, a water tank, a dosing system, a PLC (programmable logic controller) control system, a valve and a remote treatment system which are integrated in a container;
the nanofiltration system is divided into a primary nanofiltration system and a secondary nanofiltration system, a booster pump and a circulating pump which can adjust the operation pressure of the system are arranged in each nanofiltration system, and the nanofiltration system is connected to the dosing system and the water tank through a valve and a pump which can adjust the flow;
the water tank comprises a raw water tank, a cleaning tank and a water production tank, wherein the raw water tank can store garbage leachate membrane concentrated solution and water produced by the nanofiltration system, a water outlet of the raw water tank is communicated with a water inlet of the primary nanofiltration system through a pipeline, the cleaning tank stores cleaning water provided for the nanofiltration system and water produced by the nanofiltration system, the cleaning tank is respectively communicated with a concentrated solution outlet and a dialysate outlet of the nanofiltration system through pipelines, and the water production tank stores dialysate produced by the primary nanofiltration system and is communicated with a dialysate outlet of the primary nanofiltration system through a pipeline;
a dosing system capable of adding acid and scale inhibitor is arranged between the raw water tank and the primary nanofiltration system;
the PLC control system controls the operation and on-line cleaning of the primary nanofiltration system and the secondary nanofiltration system, and can also adjust the flow of the valve; the PLC control system comprises a power supply access end, a control panel and a frequency converter, and after the power supply access end is accessed to a power supply, the control panel and the frequency converter control the operation of the nanofiltration system and the adjustment of the valve flow;
the remote processing system can be networked to monitor the operation of the equipment in the container and adjust the parameters of the equipment in the container.
2. The container type landfill leachate membrane concentrate treatment system of claim 1, wherein the booster pump is divided into a primary booster pump and a secondary booster pump, the circulating pump is divided into a primary circulating pump and a secondary circulating pump, the primary booster pump and the primary circulating pump are disposed in the primary nanofiltration system to adjust the operating pressure of the primary nanofiltration system, and the secondary booster pump and the secondary circulating pump are disposed in the secondary nanofiltration system to adjust the operating pressure of the secondary nanofiltration system.
3. The container type landfill leachate membrane concentrate treatment system of claim 1, wherein the primary nanofiltration system comprises a primary feed pump for feeding the primary nanofiltration system and a primary safety filter for intercepting suspended matters in the landfill leachate membrane concentrate, the primary nanofiltration system further comprises a primary nanofiltration membrane stack for intercepting organic matters and high-valence salts in the landfill leachate membrane concentrate by using fluid pressure as power, the primary feed pump is sequentially connected with the primary safety filter, the primary booster pump, the primary circulating pump and the primary nanofiltration membrane stack through pipelines, a feed inlet of the primary feed pump is communicated with a water outlet of the raw water tank through a pipeline, a flow regulating valve is arranged on the communicating pipeline, and the regulating valve is in signal connection with a PLC control system; under the feeding of the first-level material conveying pump, the first-level nanofiltration membrane stack and the first-level security filter complete one-time decrement of the landfill leachate membrane concentrated solution through the operating pressure provided by the first-level booster pump and the operating flow provided by the first-level circulating pump, and after the one-time decrement, the landfill leachate membrane concentrated solution is treated into one-time re-concentrated solution and one-time dialysate.
4. A container-type landfill leachate membrane concentrate treatment system according to claim 3, wherein the primary nanofiltration membrane stack is provided with a primary reconcentrate outlet and a primary dialysate outlet; the water outlet of the primary re-concentrated solution is connected to 4 positions, one of the positions is connected to the raw water tank through a first water return valve, so that the primary re-concentrated solution can flow back to the raw water tank, the other position is connected to the concentrated solution storage tank through a first discharge valve for subsequent treatment, the third position is connected to the cleaning tank through a first cleaning valve, and the fourth position is connected to a pipeline between the primary circulating pump and the primary booster pump through a first return valve, so that the internal circulating flow of the equipment is improved; the primary dialysate water outlet is connected to 2 positions, wherein one position is connected to the water production tank through the first water production valve, and the other position is connected to the cleaning tank through the second cleaning valve; and the recycling of the primary reconcentration liquid and the primary dialysate is finished through the primary reconcentration liquid outlet and the primary dialysate liquid outlet.
5. The container type landfill leachate membrane concentrate treatment system of claim 1, wherein the secondary nanofiltration system comprises a secondary delivery pump for feeding the secondary nanofiltration system and a secondary safety filter for intercepting suspended matters in the primary reconcentration, the secondary nanofiltration system further comprises a secondary nanofiltration membrane stack for intercepting organic matters and high-valent salts in the primary reconcentration by using fluid pressure as power, the secondary delivery pump is sequentially connected with the secondary safety filter, the secondary booster pump, the secondary circulating pump and the secondary nanofiltration membrane stack through pipelines, a feed inlet of the secondary delivery pump is communicated with a water outlet of the water production tank through a pipeline, a flow regulating valve is arranged on the communicating pipeline, and the regulating valve is in signal connection with a PLC control system; under the feeding of the second-stage delivery pump, the second-stage nanofiltration membrane stack and the second-stage security filter complete the secondary decrement of the landfill leachate membrane concentrated solution through the operating pressure provided by the second-stage booster pump and the operating flow provided by the second-stage circulating pump, and after the secondary decrement, the landfill leachate membrane concentrated solution is treated into secondary reconcentrated solution and secondary dialysate.
6. The container-based landfill leachate membrane concentrate treatment system of claim 5, wherein the secondary nanofiltration membrane stack is provided with a secondary reconcentrate water outlet and a secondary dialysate water outlet; the water outlet of the secondary re-concentrated solution is connected to four positions, wherein the water outlet of the secondary re-concentrated solution is connected to the raw water tank through a second water return valve to enable the secondary re-concentrated solution to flow back to the raw water tank; the second dialysate water outlet is connected to two positions, wherein the second dialysate water outlet is connected to the outside of the system through a second water production valve, and is directly discharged out of the system, and the second dialysate water outlet is connected to a cleaning tank through a fourth cleaning valve and is used as cleaning water; and the secondary re-concentrated solution and the secondary dialysate are recycled through the secondary re-concentrated solution outlet and the secondary dialysate outlet.
7. The container type landfill leachate membrane concentrate treatment system of claim 1, wherein the dosing system comprises an acid tank and a scale inhibitor tank, the acid tank and the scale inhibitor tank are connected to a pipeline between the raw water tank and the first delivery pump through metering pumps, acid and the scale inhibitor are respectively added into the acid tank and the scale inhibitor tank through dosing pumps, and the acid and the scale inhibitor enter the primary nanofiltration system through a water inlet of the primary delivery pump to dose the primary nanofiltration system, so that scaling is prevented.
8. A container-type landfill leachate membrane concentrate treatment system according to claim 1, wherein the lower end of the cleaning tank has a water outlet connected to two locations, one of which is connected to a pipeline between the raw water tank and the primary feed pump through a first water replenishing valve to supply cleaning water to the primary nanofiltration system, and the other of which is connected to a pipeline between the secondary feed pump and the secondary feed pump through a second water replenishing valve to supply cleaning water to the secondary nanofiltration system.
9. The container type landfill leachate membrane concentrate treatment system of claim 1, wherein the remote treatment system is composed of a remote control system and a remote monitoring system, the remote control system comprises a field state display device, a signal sending device and a signal sensor, the signal sending device sends a signal, the signal sensor receives the signal and transmits the received signal to the field state display device, and the remote control system adjusts equipment operation parameters through the signal fed back by the field state display device so as to adapt to equipment operation under different water quality and water quantity; the remote monitoring system comprises a monitoring probe, a signal sending device and a power supply, wherein the signal sending device sends a signal received by the monitoring probe to the remote monitoring system, and the monitoring system can monitor the running condition of equipment in real time and send an alarm to the abnormal condition on site.
10. The system of claim 1, wherein an air conditioning system is integrated into the container, the air conditioning system comprising an air conditioner and an outdoor unit, the air conditioning system being capable of adjusting the temperature of the container to a relatively suitable range for operation of the system in both hot summer and cold winter months.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120504935.9U CN216614249U (en) | 2021-03-10 | 2021-03-10 | Container formula landfill leachate membrane concentrate processing system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120504935.9U CN216614249U (en) | 2021-03-10 | 2021-03-10 | Container formula landfill leachate membrane concentrate processing system |
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| CN216614249U true CN216614249U (en) | 2022-05-27 |
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| CN202120504935.9U Active CN216614249U (en) | 2021-03-10 | 2021-03-10 | Container formula landfill leachate membrane concentrate processing system |
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