CN115321702A - Resource recycling system and method for waste water containing snow-melting agent - Google Patents
Resource recycling system and method for waste water containing snow-melting agent Download PDFInfo
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- CN115321702A CN115321702A CN202210841419.4A CN202210841419A CN115321702A CN 115321702 A CN115321702 A CN 115321702A CN 202210841419 A CN202210841419 A CN 202210841419A CN 115321702 A CN115321702 A CN 115321702A
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F9/00—Multistage treatment of water, waste water or sewage
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D29/00—Other filters with filtering elements stationary during filtration, e.g. pressure or suction filters, or filtering elements therefor
- B01D29/62—Regenerating the filter material in the filter
- B01D29/66—Regenerating the filter material in the filter by flushing, e.g. counter-current air-bumps
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D36/00—Filter circuits or combinations of filters with other separating devices
- B01D36/04—Combinations of filters with settling tanks
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/001—Processes for the treatment of water whereby the filtration technique is of importance
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/54—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities using organic material
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/11—Turbidity
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2209/00—Controlling or monitoring parameters in water treatment
- C02F2209/40—Liquid flow rate
Abstract
The invention provides a system and a method for recycling waste water containing a snow-melting agent, which relate to the field of waste water recovery and comprise the following steps: the method comprises the following steps: the water inlet end of the medicament mixing module is connected with one end of a water inlet pipeline and one end of a first medicament adding pipeline, a water inlet pump is arranged on the water inlet pipeline, and a first medicament adding pump is arranged on the first medicament adding pipeline; the water inlet end of the flocculation precipitation module is connected with the water outlet end of the medicament mixing module, a second dosing pipeline is connected to the inside of the medicament mixing module and is close to the position of the water outlet end of the medicament mixing module, and a second dosing pump is arranged on the second dosing pipeline; the waste water can obtain recycled standard water after sequentially passing through the medicament mixing module, the flocculation precipitation module and the mechanical filtering module, and the system has short process route and high treatment efficiency when being used for treating the snow-melting agent waste water.
Description
Technical Field
The invention belongs to the field of wastewater recovery, and particularly relates to a system and a method for recycling wastewater containing a snow-melting agent.
Background
In winter, the degree of difficulty that sanitation operation vehicle cleaned the road can be increased to chilly weather, can lead to the risk that the road freezes to can seriously influence road vehicle's the current in winter snow day, for guaranteeing that sanitation operation and traffic are unobstructed in winter, can add snow melt agent solution in sanitation operation vehicle, prevent that the frozen risk from appearing in the operation back road and also can be used for spraying of road to melt the snow on the road in snow day, the road mediation of being convenient for. At present, the snow-melting agent developed in China is of a plurality of types, and mainly takes a chlorine salt snow-melting agent as a main material. The general snow melt agent waste water discharges into municipal pipe network and gets into sewage treatment plant system after collecting, and if contain the snow melt agent waste water and if discharge into city sewer through not handling, can seriously corrode municipal pipe network to snow melt agent waste water gets into sewage treatment plant system, can influence the biochemical system of water factory, causes the risk that the play water exceeds standard.
At present, the conventional treatment method of the salt-containing wastewater is mainly divided into the following three methods: thermal concentration, membrane separation techniques and bioaugmentation. However, each treatment method has corresponding disadvantages in the application process, and a proper treatment process and route are selected according to the characteristics of wastewater in different industries, and a plurality of treatment technologies are organically combined, so that the process route is long and the treatment efficiency is low when the snow-melting agent wastewater is treated.
Disclosure of Invention
The invention aims to provide a system and a method for recycling waste water containing a snow-melting agent, aiming at the defects in the prior art.
In order to achieve the above object, the present invention provides a recycling system for waste water containing a snow-melting agent, comprising:
the water inlet end of the medicament mixing module is connected with one end of a water inlet pipeline and one end of a first medicament feeding pipeline, a water inlet pump is arranged on the water inlet pipeline, and a first medicament feeding pump is arranged on the first medicament feeding pipeline;
the first dosing pump is used for pumping a coagulant into the reagent mixing module through a first dosing pipeline;
the water inlet end of the flocculation precipitation module is connected with the water outlet end of the medicament mixing module, a second dosing pipeline is connected to the inside of the medicament mixing module and is close to the position of the water outlet end of the medicament mixing module, and a second dosing pump is arranged on the second dosing pipeline;
the second dosing pump is used for pumping a flocculating agent into the water outlet end of the medicament mixing module through a second dosing pipeline to mix in advance;
the water inlet end of the mechanical filtering module and the water outlet end of the flocculation precipitation module are respectively connected with two ends of a first connecting pipeline, the water outlet end of the mechanical filtering module is connected with one end of the water outlet pipeline, and a sand filtration water inlet pump is arranged on the first connecting pipeline;
and the dosing controller is electrically connected with the first dosing pump and the second dosing pump.
Optionally, the method further comprises:
the water inlet turbidity detection sensor and the water inlet flowmeter are both arranged on the water inlet pipeline;
the effluent turbidity detection sensor is arranged on the first connecting pipeline;
the main control unit, the intake pump is connected to the main control unit electricity, sand filtration intake pump, add the medicine controller, intake turbidity detection sensor, go out water turbidity detection sensor and the flowmeter of intaking, the main control unit is used for the basis the power that the first medicine pump that adds of medicine controller control and second medicine pump are passed through to the discharge of water that intake turbidity detection sensor's the turbidity of intaking, the play water turbidity detection sensor that the turbidity detection sensor records and the inflow flowmeter of intaking surveyed.
Optionally, the medicament mixing module includes mixing tank and first agitator, first agitator set up in mixing tank's inside, mixing tank's the end of intaking is connected with the one end of intaking the pipeline and the one end of first medicine pipeline, the second adds medicine pipeline connection in mixing tank's inside 3/4 high department and be close to its position of going out the water end, main control unit electricity is connected first agitator.
Optionally, the flocculation and precipitation module includes sedimentation tank, filler, second agitator and baffle, the end of intaking of sedimentation tank is connected with the play water end of mixing the pond, the sedimentation tank is from last to establishing in proper order down to high-efficient clarification district, suspended solid flocculation district and mud sedimentation district, the filler sets up in high-efficient clarification district, the second agitator with the baffle sets up in the suspended solid flocculation district, the sedimentation tank is intake the end and is connected with the play water end of mixing the pond, the second agitator is connected to main control unit electricity.
Optionally, the mechanical filtration module comprises a plurality of filtration tanks, and a water distribution plate, a filtration layer and a filtration plate are sequentially arranged in each filtration tank from top to bottom;
it is a plurality of filter tank arranges in proper order along the rivers direction, and is adjacent filter tank passes through the second connecting line intercommunication, the head end filter tank the end of intaking with the play water end of sedimentation tank respectively with the both ends of first connecting line are connected, the tail end filter tank with the one end of play water pipe line is connected.
Optionally, the cleaning device further comprises a back cleaning module, wherein the back cleaning module comprises a clean water tank, a water inlet end of the clean water tank is connected with the water outlet pipeline, the water outlet pipeline is provided with a water outlet electromagnetic valve along the water flow direction, and the first connecting pipeline is provided with a water inlet electromagnetic valve;
the water outlet end of the clean water tank is connected with one end of a back-washing water inlet pipeline, one end of a plurality of branch pipelines is connected to the back-washing water inlet pipeline, the other ends of the branch pipelines are respectively connected with the back-washing water inlet ends of a plurality of filter tanks, and a back-washing pump and a back-washing water inlet electromagnetic valve are sequentially arranged on the back-washing water inlet pipeline along the water flow direction;
the back-washing water outlet end of the filter tank is connected with one end of a back-washing water outlet pipeline, the other end of the back-washing water outlet pipeline is connected to a water inlet pipeline, and a back-washing water outlet electromagnetic valve is arranged on the back-washing water outlet pipeline;
the main controller is electrically connected with the water outlet electromagnetic valve, the reverse cleaning pump, the water inlet electromagnetic valve, the reverse cleaning water inlet electromagnetic valve and the reverse cleaning water outlet electromagnetic valve.
Optionally, the main controller includes a calculation module, and the calculation module is configured to calculate, through a mathematical model, a chemical dosing amount of the chemical mixing module and a chemical dosing amount of the flocculation precipitation module according to the water inlet turbidity measured by the water inlet turbidity detection sensor, the water outlet turbidity measured by the water outlet turbidity detection sensor, and the water flow measured by the water inlet flowmeter, and correct parameters of the mathematical model according to the water outlet turbidity measured by the water outlet turbidity detection sensor;
the dosing controller comprises a control frequency converter, and the control frequency converter is used for controlling the power of the first dosing pump and the power of the second dosing pump respectively according to the dosing amount of the medicament mixing module and the dosing amount of the medicament of the flocculation precipitation module.
The invention also provides a resource recycling method of the waste water containing the snow-melting agent, and the resource recycling system of the waste water containing the snow-melting agent is utilized, and the method comprises the following steps:
adding wastewater into a medicament mixing module, adding a coagulant into the medicament mixing module, and then quickly mixing the coagulant with the wastewater;
introducing the mixed wastewater into a flocculation precipitation module, adding a flocculating agent into the flocculation precipitation module, and then standing for precipitation;
and (4) introducing the wastewater subjected to standing precipitation into a mechanical filtration module, and then discharging the treated water.
Optionally, the method further comprises:
monitoring the water inlet turbidity and the water inlet flow of the medicament mixing module and the water outlet turbidity of the flocculation precipitation module;
and calculating the adding amount of the coagulant and the flocculant according to the inlet water turbidity and the inlet water flow of the medicament mixing module and the outlet water turbidity of the flocculation precipitation module.
Optionally, the method further comprises:
and backwashing the mechanical filter module by using the treated water according to a set time interval.
The invention provides a system and a method for recycling wastewater containing a snow-melting agent, which have the beneficial effects that:
1. this system adopts the modularized design, medicament mixing module has set gradually along rivers, flocculation and precipitation module and mechanical filtration module, and medicament mixing module is connected with first dosing pump and second dosing pump, first dosing pump and second dosing pump are gone into coagulant and flocculating agent pump in the medicament mixing module, because the second adds the position of medicine line connection in the inside of medicament mixing module and be close to its water outlet end, and then can let the flocculating agent mix in advance in getting into the flocculation and precipitation module, avoid setting up a plurality of velocity gradients's flocculation and precipitation module, reduce area, waste water is passing through medicament mixing module in proper order, behind flocculation and precipitation module and the mechanical filtration module, can obtain the standard water of retrieval and utilization, adopt this system technology route short when handling snow melt agent waste water, the treatment effeciency is high.
2. The method utilizes the resource recycling system of the waste water containing the snow-melting agent to filter out water-soluble pollutants in a precipitation mode, and also can filter out organic matters, colloid particles and the like which cannot be taken out in the precipitation mode in a mechanical filtration mode to obtain recycled standard water.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The above and other objects, features and advantages of the present invention will become more apparent by describing in more detail exemplary embodiments thereof with reference to the attached drawings, in which like reference numerals generally represent like parts throughout.
Fig. 1 shows a schematic structural diagram of a snow-melting agent-containing wastewater recycling system according to an embodiment of the invention.
Fig. 2 shows a flow chart of a method for recycling wastewater containing a snow-melting agent according to an embodiment of the invention.
Description of reference numerals:
1. a medicament mixing module; 2. a water inlet line; 3. a first dosing line; 4. a first dosing pump; 5. a flocculation precipitation module; 6. a second dosing line; 7. a second dosing pump; 8. a mechanical filtration module; 9. a first connecting line; 10. an outlet line; 11. a sand filtration water inlet pump; 12. an intake water turbidity detection sensor; 13. a water inlet flow meter; 14. an effluent turbidity detection sensor; 15. a mixing tank; 16. a first stirrer; 17. a sedimentation tank; 18. a filler; 19. a second agitator; 20. a baffle plate; 21. a water distribution plate; 22. a filter layer; 23. filtering a plate; 24. a second connecting line; 25. a back-washing module; 26. a clean water tank; 27. a water outlet electromagnetic valve; 28. back-cleaning a water inlet pipeline; 29. a back washing pump; 30. a water inlet electromagnetic valve; 31. reversely cleaning the water inlet electromagnetic valve; 32. back-cleaning the water outlet pipeline; 33. back-cleaning the water outlet electromagnetic valve; 34. a water inlet pump; 35. and (7) filtering the tank.
Detailed Description
Preferred embodiments of the present invention will be described in more detail below. While the following describes preferred embodiments of the present invention, it should be understood that the present invention may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.
The invention provides a resource recycling system for waste water containing a snow-melting agent, which comprises:
the water inlet end of the medicament mixing module is connected with one end of a water inlet pipeline and one end of a first medicament adding pipeline, a water inlet pump is arranged on the water inlet pipeline, and a first medicament adding pump is arranged on the first medicament adding pipeline;
the first dosing pump is used for pumping a coagulant into the reagent mixing module through a first dosing pipeline;
the water inlet end of the flocculation precipitation module is connected with the water outlet end of the medicament mixing module, the second dosing pipeline is connected to the inside of the medicament mixing module and is close to the position of the water outlet end of the medicament mixing module, and a second dosing pump is arranged on the second dosing pipeline;
the second dosing pump is used for pumping the flocculating agent into the position of the water outlet end of the medicament mixing module through a second dosing pipeline for mixing in advance;
the water inlet end of the mechanical filtering module and the water outlet end of the flocculation precipitation module are respectively connected with two ends of a first connecting pipeline, the water outlet end of the mechanical filtering module is connected with one end of a water outlet pipeline, and a sand filtration water inlet pump is arranged on the first connecting pipeline;
the dosing controller is electrically connected with the first dosing pump and the second dosing pump.
Specifically, the water inlet pump is with waste water through the inlet line pump go into the medicament mixing module, simultaneously first medicine pump with coagulant (PAC) through first medicine pipeline pump go into the medicament mixing module in, the coagulant can be with the suspended particle coagulation of aquatic into tiny floc, partly can take place to deposit, then flow into in the flocculation and precipitation module, simultaneously the second medicine pump with flocculating agent (PAM) through the second medicine pipeline pump go into the water outlet end position of medicament mixing module, let the flocculating agent mix in advance, in entering into the flocculation and precipitation module, the flocculating agent can be with tiny floc coagulation become big alum blossom, deposit more easily, then flow into mechanical filtration module, the suspended solid, the organic matter, the colloidal particle, the microorganism, chlorine smell and some heavy metals in intercepting aquatic, and then can obtain the standard water of retrieval and utilization, adopt this system can the process route short when handling snow melt agent waste water smelling, the treatment effeciency is high.
Optionally, the method further comprises:
the water inlet turbidity detection sensor and the water inlet flowmeter are both arranged on a water inlet pipeline;
the effluent turbidity detection sensor is arranged on the first connecting pipeline;
the main controller is electrically connected with the water inlet pump, the sand filtration water inlet pump, the dosing controller, the water inlet turbidity detection sensor, the water outlet turbidity detection sensor and the water inlet flow meter and is used for controlling the power of the first dosing pump and the second dosing pump through the dosing controller according to the water inlet turbidity detected by the water inlet turbidity detection sensor, the water outlet turbidity detected by the water outlet turbidity detection sensor and the water flow detected by the water inlet flow meter;
the main controller comprises a calculation module, the calculation module is used for calculating the medicament adding amount of the medicament mixing module and the medicament adding amount of the flocculation precipitation module through a mathematical model according to the inlet water turbidity measured by the inlet water turbidity detection sensor, the outlet water turbidity measured by the outlet water turbidity detection sensor and the water flow measured by the inlet water flowmeter, and correcting the parameters of the mathematical model according to the outlet water turbidity measured by the outlet water turbidity detection sensor;
the dosing controller comprises a control frequency converter, and the control frequency converter is used for controlling the power of the first dosing pump and the power of the second dosing pump respectively according to the dosing amount of the medicament mixing module and the dosing amount of the medicament of the flocculation precipitation module.
Specifically, the mathematical model is a regression model trained in advance according to an experimental result, the mathematical model is a spatial three-dimensional model, the independent variable is turbidity x, the dependent variable is flocculant adding amount z and coagulant adding amount y, the mathematical relation is z = a x + b, and y = c x + d, model regression is performed through experimental data to calculate four coefficients of a, b, c and d, model parameters are adjusted regularly according to effluent turbidity data, and the coefficients are corrected to enable the dosing amount to be more accurate, automation of medicament adding is achieved, errors caused by manual dosing are avoided, dosing efficiency is improved, and the problem of dosing lag is solved.
Optionally, the medicament mixing module includes mixing tank and first agitator, and first agitator sets up in the inside of mixing tank, and the end of intaking in mixing tank is connected with the one end of intaking the pipeline and the one end of first medicine pipeline, the second adds medicine pipe connection and is in the position that the inside 3/4 high department of mixing tank just is close to its play water end, and its purpose can let flocculating agent (PAM) mix in advance, avoids setting up the sedimentation tank of a plurality of velocity gradients, reduces area, and first agitator is connected to main control unit electricity.
Specifically, the stirring speed of the first stirrer is controlled at 260rpm, and the average stirring speed gradient is 378S -1 The retention time is 1.5min, the dosage of the coagulant (PAC) is 30mg/L, and compared with a pipeline mixer, the condition that the pipeline is blocked due to the fact that the concentration (SS) of the water inlet suspended matters is high can be avoided in order to ensure that the wastewater and the coagulant can be fully mixed.
Optionally, the flocculation and precipitation module includes sedimentation tank, filler, second agitator and baffle, and the end of intaking of sedimentation tank is connected with the play water end of mixing tank, and the sedimentation tank is from last to establishing in proper order down to high-efficient clarification district, suspended solid flocculation district and sludge settling area, it sets up in high-efficient clarification district to pack, the second agitator with the baffle setting is in the suspended solid flocculation district, and the sedimentation tank is intake and is held with the play water of mixing tank and be connected, and the second agitator is connected to main control unit electricity.
It is specific, colleges and universities 'clarification district is in order to increase the equivalent area of deposiing, its inside filler adopts the hexagonal pipe swash plate, the diameter of filler is 25mm, suspended solid flocculation district effect makes little floccule collide each other through the sewage of flocculating agent intensive mixing under the effect of external force, form the big floccule with closely knit degree high of particle diameter, accelerate the settling velocity, thereby realize solid-liquid separation' S effect, the stirring rotational speed of the second agitator in the suspended solid flocculation district is 26rpm, average stirring speed gradient is 14S -1 The retention time is 10min, the dosage of a flocculating agent (PAM) is 2mg/L, and an internal reflux area can be formed in a suspended matter flocculation area by adding a baffle plate, so that the flocculation effect of the device is improved, and the addition of the flocculating agent is reduced;
the flocculation precipitation module integrates a suspended matter flocculation area and a sludge precipitation area, so that the utilization efficiency of equipment is improved, the occupied area is reduced, and the running load of the system can reach 4m/h.
Optionally, the mechanical filtering module comprises a plurality of filtering tanks, and a water distribution plate, a filtering layer and a filtering plate are sequentially arranged in each filtering tank from top to bottom;
the plurality of filter tanks are sequentially arranged along the water flow direction, adjacent filter tanks are communicated through a second connecting pipeline, the water inlet end of the filter tank at the head end and the water outlet end of the sedimentation tank are respectively connected with two ends of the first connecting pipeline, and the filter tank at the tail end is connected with one end of the water outlet pipeline;
the second connecting pipeline is sequentially provided with a middle pressure gauge and a middle electromagnetic valve along the water flow direction.
Specifically, mechanical filtration is intake through the water distribution board, and rivers distribute uniformly inside filtering tank, then through the filter layer, go out water through the filter plate at last, and the filter layer includes: the filling height of the refined quartz sand of 2-4mm is 0.1m and the filling height of the refined quartz sand of 0.5-1mm is 0.8m, so that the filter cap has a better removal effect on suspended matters, and the parameters of the filter cap are as follows: the water quantity is 0.7-1.0t/h, the gap between the gaps is 250 microns, the flux of the filter cap is large, the gaps are small and can prevent the leakage of filter materials, the operation load of the system can reach 7m/h, the turbidity of the outlet water after the wastewater is filtered meets the water quality requirement of road cleaning water in the urban sewage recycling urban service water quality standard, the concentration and the turbidity of the inlet water suspended matters are 1266mg/L and 368NTU, the removal rate can reach 97.2 percent and 99.7 percent, the concentration of the suspended matters is equal to 36mg/L, the turbidity of the outlet water is equal to 1NTU, and the outlet water returns to a sanitation vehicle water tank and is used for vehicle washing in winter and road cleaning.
Optionally, the sand filtration water inlet pump and the filter tank are sequentially provided with a flow guide flow meter, a water inlet electromagnetic valve and a flow guide pressure gauge along the water flow direction on the first connecting pipeline and between the sand filtration water inlet pump and the filter tank;
the water outlet end of the clean water tank is connected with one end of a back-washing water inlet pipeline, one end of a plurality of branch pipelines is connected to the back-washing water inlet pipeline, the other ends of the branch pipelines are respectively connected with the back-washing water inlet ends of the plurality of filter tanks, and a back-washing pump, a back-washing flow meter and a back-washing water inlet electromagnetic valve are sequentially arranged on the back-washing water inlet pipeline along the water flow direction;
the back-washing water outlet end of the filter tank is connected with one end of a back-washing water outlet pipeline, the other end of the back-washing water outlet pipeline is connected to a water inlet pipeline, and a back-washing water outlet electromagnetic valve is arranged on the back-washing water outlet pipeline;
the main controller is electrically connected with the water outlet electromagnetic valve, the reverse cleaning pump, the water inlet electromagnetic valve, the reverse cleaning water inlet electromagnetic valve and the reverse cleaning water outlet electromagnetic valve.
Specifically, the filtered clean water can be discharged into a clean water tank, and the clean water can be backflushed into a filtering tank under the action of a backflushing pump to remove impurities trapped in the filtering layer, so that the filtering layer recovers the filtering capacity.
Optionally, a plurality of the filters are arranged on the filter plate.
Specifically, in the back washing process, the filter caps can distribute clean water in the filter tank to uniformly wash the filter layer.
Optionally, an intermediate water tank is arranged on the first connecting pipeline and between the flocculation precipitation module and the sand filtration water inlet pump.
Specifically, the intermediate water tank is used for storing water flowing out of the flocculation precipitation module, so that the sand filtration water inlet pump can conveniently pump the water into the mechanical filtration module.
Optionally, still include sludge dewatering equipment, the end of emptying of sedimentation tank and the end of emptying of filtering the jar all are connected with the one end of emptying the pipeline, and sludge dewatering equipment's input and the other end of emptying the pipeline are connected, are equipped with the emptying valve on the emptying pipeline, and sludge dewatering equipment's output is connected with the one end of dehydration pipeline, and the other end of dehydration pipeline is connected on advancing the water pipe line.
Specifically, in mud dewatering equipment can be discharged into to the sedimentation tank in with the filtration jar, with mud and water separating, divide the delivery water can directly enter into the inlet line on, obtain the clear water through system filtering, prevent the waste of water resource.
The invention also provides a resource recycling method of the waste water containing the snow-melting agent, and the resource recycling system of the waste water containing the snow-melting agent is utilized, and the method comprises the following steps:
adding the wastewater into a medicament mixing module, adding a coagulant into the medicament mixing module, and then quickly mixing the coagulant with the wastewater;
introducing the mixed wastewater into a flocculation precipitation module, adding a flocculating agent into the flocculation precipitation module, and then standing for precipitation;
and (4) introducing the wastewater subjected to standing precipitation into a mechanical filtration module, and then discharging the treated water.
Optionally, the method further comprises:
monitoring the inlet water turbidity and inlet water flow of the medicament mixing module and the outlet water turbidity of the flocculation precipitation module;
and calculating the adding amount of the coagulant and the flocculant according to the inlet water turbidity and the inlet water flow of the medicament mixing module and the outlet water turbidity of the flocculation precipitation module.
Optionally, the method further comprises:
and backwashing the mechanical filter module by using the treated water according to a set time interval.
Example 1
As shown in fig. 1, the invention provides a recycling system for waste water containing a snow-melting agent, which comprises:
the water inlet end of the medicament mixing module 1 is connected with one end of a water inlet pipeline 2 and one end of a first medicament adding pipeline 3, a water inlet pump 34 is arranged on the water inlet pipeline 2, and a first medicament adding pump 4 is arranged on the first medicament adding pipeline 3;
the first dosing pump is used for pumping a coagulant into the reagent mixing module through the first dosing pipeline;
the water inlet end of the flocculation precipitation module 5 is connected with the water outlet end of the medicament mixing module 1, a second dosing pipeline is connected to the inside of the medicament mixing module and is close to the position of the water outlet end of the medicament mixing module, and a second dosing pump 7 is arranged on the second dosing pipeline 6;
the second dosing pump is used for pumping the flocculating agent into the water outlet end of the medicament mixing module through a second dosing pipeline to mix in advance;
the water inlet end of the mechanical filtering module 8 and the water outlet end of the flocculation precipitation module 5 are respectively connected with two ends of a first connecting pipeline 9, the water outlet end of the mechanical filtering module 8 is connected with one end of a water outlet pipeline 10, and a sand filtration water inlet pump 11 is arranged on the first connecting pipeline 9;
the dosing controller is electrically connected with the first dosing pump 4 and the second dosing pump 7.
In this embodiment, the method further includes:
the water inlet turbidity detection sensor 12 and the water inlet flowmeter 13 are arranged on the water inlet pipeline 2;
an effluent turbidity detection sensor 14, wherein the effluent turbidity detection sensor 14 is arranged on the first connecting pipeline 9;
the main control unit, the main control unit electricity is connected intake pump 34, sand filtration intake pump 11, add the medicine controller, the turbidity of intaking detects sensor 12, goes out water turbidity and detects sensor 14 and intake flowmeter 13, and the main control unit is used for passing through the power of adding medicine controller control first medicine pump 4 and second medicine pump 7 according to the water turbidity that the turbidity of intaking detected 12 measures, the water turbidity that goes out water turbidity detects sensor 14 and the discharge of water that intake flowmeter 13 surveyed.
In this embodiment, the medicament mixing module 1 includes mixing tank 15 and first agitator 16, and first agitator 16 sets up in the inside of mixing tank 15, and the end of intaking of mixing tank 15 is connected with the one end of intaking 2 pipeline and the one end of first medicine pipeline 3, the second medicine pipeline connection be in the position that the inside 3/4 height department of mixing tank just is close to its water outlet end, first agitator 16 is connected to the main control unit electricity.
In this embodiment, flocculation and precipitation module 5 includes sedimentation tank 17, filler 18, second agitator 19 and baffle 20, sedimentation tank 17 intake the water end and mix the play water end of pond 15 and be connected, sedimentation tank 17 sets gradually to high-efficient clarification district, suspended solid flocculation district and sludge settling district from last down, filler 18 sets up in high-efficient clarification district, second agitator 19 and baffle 20 set up in suspended solid flocculation district, sedimentation tank 17 intakes the water end and is connected with the play water end that mixes pond 15, main control unit electricity connects second agitator 19.
In this embodiment, the mechanical filter module 8 includes a plurality of filter tanks 35, and the interior of the filter tanks 35 is provided with a water distribution plate 21, a filter layer 22 and a filter plate 23 from top to bottom;
the plurality of filter tanks 35 are sequentially arranged along the water flow direction, the adjacent filter tanks 35 are communicated through the second connecting pipeline 24, the water inlet end of the filter tank 35 at the head end and the water outlet end of the sedimentation tank 17 are respectively connected with two ends of the first connecting pipeline 9, and the filter tank 35 at the tail end is connected with one end of the water outlet pipeline 10.
In this embodiment, the back-washing module 25 is further included, the back-washing module 25 includes a clean water tank 26, a water inlet end of the clean water tank 26 is connected with the water outlet pipeline 10, the water outlet pipeline 10 is provided with a water outlet electromagnetic valve 27 along a water flow direction, and a water inlet electromagnetic valve 30 is arranged on the first connecting pipeline 9;
the water outlet end of the clean water tank 26 is connected with one end of a backwashing water inlet pipeline 28, one end of a plurality of branch pipelines is connected to the backwashing water inlet pipeline 28, the other ends of the plurality of branch pipelines are respectively connected with backwashing water inlet ends of a plurality of filter tanks 35, and a backwashing pump 29 and a backwashing water inlet electromagnetic valve 31 are sequentially arranged on the backwashing water inlet pipeline 28 along the water flow direction;
the back-washing water outlet end of the filter tank 35 is connected with one end of a back-washing water outlet pipeline 32, the other end of the back-washing water outlet pipeline 32 is connected with the water inlet pipeline 2, and a back-washing water outlet electromagnetic valve 33 is arranged on the back-washing water outlet pipeline 32;
the main controller is electrically connected with the water outlet electromagnetic valve 27, the backwashing pump 29, the water inlet electromagnetic valve 30, the backwashing water inlet electromagnetic valve 31 and the backwashing water outlet electromagnetic valve 33.
In this embodiment, the main controller includes a calculation module, which is configured to calculate the dosage of the chemical mixing module 1 and the dosage of the flocculating and settling module 5 through a mathematical model according to the water turbidity detected by the inlet water turbidity detection sensor 12, the water turbidity detected by the outlet water turbidity detection sensor 14, and the water flow detected by the inlet water flowmeter 13, and correct parameters of the mathematical model according to the water turbidity detected by the outlet water turbidity detection sensor 14;
the dosing controller comprises a control frequency converter which is used for controlling the power of the first dosing pump 4 and the power of the second dosing pump 7 respectively according to the dosing amount of the medicament mixing module 1 and the dosing amount of the medicament of the flocculation precipitation module 5.
Example 2
As shown in fig. 2, the invention provides a resource recycling method for waste water containing a snow-melting agent, which utilizes the resource recycling system for waste water containing a snow-melting agent, and the method comprises the following steps:
adding wastewater into the reagent mixing module 1, adding a coagulant into the reagent mixing module 1, and then quickly mixing the coagulant with the wastewater;
introducing the mixed wastewater into a flocculation precipitation module 5, adding a flocculating agent into the flocculation precipitation module 5, and then standing for precipitation;
and introducing the wastewater subjected to standing precipitation into the mechanical filtration module 8, and then discharging the treated water.
In this embodiment, the method further includes:
monitoring the water inlet turbidity and the water inlet flow of the medicament mixing module 1 and the water outlet turbidity of the flocculation precipitation module 5;
and calculating the adding amount of the coagulant and the flocculant according to the inlet water turbidity and the inlet water flow of the medicament mixing module 1 and the outlet water turbidity of the flocculation precipitation module 5.
In this embodiment, the method further includes:
and backwashing the mechanical filter module 8 by using the treated water according to a set time interval.
In summary, when the method for recycling the wastewater containing the snow-melting agent provided by the invention is implemented, the system for recycling the wastewater containing the snow-melting agent takes the following steps of: the waste water is pumped into the mixing tank 15 by the water inlet pump 34 through the water inlet pipeline 3, the coagulant is pumped into the mixing tank 15 by the first dosing pump 4 through the first dosing pipeline 3, the waste water and the coagulant can be fully mixed under the stirring action of the first stirrer 16, the coagulant can coagulate water-soluble pollutants into tiny insoluble substances, part of the insoluble substances can be precipitated and then flow into the sedimentation tank 17, the flocculant is pumped into the position which is 3/4 of the height inside the mixing tank and is close to the water outlet end of the mixing tank by the second dosing pump 7 through the second dosing pipeline 6, the flocculant (PAM) is mixed in advance, the tiny insoluble substances can be coagulated into large alum flocs by the flocculant when the flocculant enters the sedimentation tank 17, the precipitation is easier to occur, wherein, the main controller calculates the medicament adding amount of the medicament mixing module 1 and the medicament adding amount of the flocculation precipitation module 5 through a mathematical model according to the water turbidity measured by the water inlet turbidity detection sensor 12, the water turbidity measured by the water outlet turbidity detection sensor 14 and the water flow measured by the water inlet flow meter 13, controls the frequency converter to respectively control the power of the first medicament adding pump 4 and the second medicament adding pump 7 according to the medicament adding amount of the medicament mixing module 1 and the medicament adding amount of the flocculation precipitation module 5, realizes the automation of medicament adding, avoids errors caused by artificial medicament adding, improves the medicament adding efficiency, solves the problem of medicament adding lag, solves the problem of medicament adding delay when precipitated wastewater flows into the filter tank 35, mechanically filters the inlet water through the water distribution plate 21, and traps suspended matters, organic matters, colloid particles, microorganisms, chlorine odor and heavy metals in the water through the filter plate 23, the system has the advantages of short process route, high treatment efficiency, low investment and operation cost and simple operation when the system is used for treating the snow-melting agent wastewater, can be independently and combinatively used according to the effluent water quality and specific occasions, and is easy to amplify according to the water quantity.
Having described embodiments of the present invention, the foregoing description is intended to be exemplary, not exhaustive, and not limited to the embodiments disclosed. Many modifications and variations will be apparent to those of ordinary skill in the art without departing from the scope and spirit of the described embodiments.
Claims (10)
1. A resource recycling system for waste water containing a snow-melting agent is characterized by comprising:
the water inlet end of the medicament mixing module is connected with one end of a water inlet pipeline and one end of a first medicament feeding pipeline, a water inlet pump is arranged on the water inlet pipeline, and a first medicament feeding pump is arranged on the first medicament feeding pipeline;
the first dosing pump is used for pumping a coagulant into the reagent mixing module through a first dosing pipeline;
the water inlet end of the flocculation precipitation module is connected with the water outlet end of the medicament mixing module, a second dosing pipeline is connected to the inside of the medicament mixing module and is close to the position of the water outlet end of the medicament mixing module, and a second dosing pump is arranged on the second dosing pipeline;
the second dosing pump is used for pumping a flocculating agent into the position of the water outlet end of the medicament mixing module through a second dosing pipeline to mix in advance;
the water inlet end of the mechanical filtering module and the water outlet end of the flocculation and precipitation module are respectively connected with two ends of a first connecting pipeline, the water outlet end of the mechanical filtering module is connected with one end of the water outlet pipeline, and a sand filtration water inlet pump is arranged on the first connecting pipeline;
and the dosing controller is electrically connected with the first dosing pump and the second dosing pump.
2. The recycling system of the wastewater containing the snow-melting agent as claimed in claim 1, further comprising:
the water inlet turbidity detection sensor and the water inlet flowmeter are both arranged on the water inlet pipeline;
the effluent turbidity detection sensor is arranged on the first connecting pipeline;
the main control unit, the intake pump is connected to the main control unit electricity, sand filtration intake pump, add the medicine controller, intake turbidity detection sensor, play water turbidity detection sensor and intake flowmeter, the main control unit be used for the basis the power that the first medicine pump that adds of medicine controller control and the second medicine pump is passed through to the discharge of water that intake turbidity detection sensor measured intake turbidity, play water turbidity detection sensor measured and intake flowmeter.
3. The recycling system of waste water containing snow-melting agent as claimed in claim 2, wherein the chemical mixing module comprises a mixing tank and a first stirrer, the first stirrer is arranged inside the mixing tank, the water inlet end of the mixing tank is connected with one end of a water inlet pipeline and one end of a first chemical feeding pipeline, the second chemical feeding pipeline is connected at a position 3/4 of the height inside the mixing tank and close to the water outlet end of the mixing tank, and the main controller is electrically connected with the first stirrer.
4. The snow melt agent-containing wastewater resource recycling system according to claim 3, wherein the flocculation precipitation module comprises a sedimentation tank, a filler, a second stirrer and a baffle, wherein a water inlet end of the sedimentation tank is connected with a water outlet end of the mixing tank, the sedimentation tank is sequentially provided with a high-efficiency clarification area, a suspended matter flocculation area and a sludge settling area from top to bottom, the filler is arranged in the high-efficiency clarification area, the second stirrer and the baffle are arranged in the suspended matter flocculation area, a water inlet end of the sedimentation tank is connected with a water outlet end of the mixing tank, and the main controller is electrically connected with the second stirrer.
5. The recycling system of waste water containing snow-melting agent as claimed in claim 4, wherein the mechanical filtering module comprises a plurality of filtering tanks, and a water distribution plate, a filtering layer and a filtering plate are arranged in the filtering tank from top to bottom in sequence;
it is a plurality of filter tank arranges in proper order along the rivers direction, and is adjacent filter tank passes through the second connecting line intercommunication, the head end filter tank the end of intaking with the play water end of sedimentation tank respectively with the both ends of first connecting line are connected, the tail end filter tank with the one end of play water pipe line is connected.
6. The snow melt agent-containing wastewater resource recycling system according to claim 5, further comprising a backwashing module, wherein the backwashing module comprises a clean water tank, a water inlet end of the clean water tank is connected with the water outlet pipeline, the water outlet pipeline is provided with a water outlet solenoid valve along a water flow direction, and the first connecting pipeline is provided with a water inlet solenoid valve;
the water outlet end of the clean water tank is connected with one end of a back-washing water inlet pipeline, one end of a plurality of branch pipelines is connected to the back-washing water inlet pipeline, the other ends of the branch pipelines are respectively connected with the back-washing water inlet ends of a plurality of filter tanks, and a back-washing pump and a back-washing water inlet electromagnetic valve are sequentially arranged on the back-washing water inlet pipeline along the water flow direction;
the back-washing water outlet end of the filter tank is connected with one end of a back-washing water outlet pipeline, the other end of the back-washing water outlet pipeline is connected to a water inlet pipeline, and a back-washing water outlet electromagnetic valve is arranged on the back-washing water outlet pipeline;
the main controller is electrically connected with the water outlet electromagnetic valve, the reverse cleaning pump, the water inlet electromagnetic valve, the reverse cleaning water inlet electromagnetic valve and the reverse cleaning water outlet electromagnetic valve.
7. The recycling system of wastewater containing snow-melting agent as claimed in claim 2, wherein the main controller comprises a calculation module, the calculation module is used for calculating the dosage of the medicament mixing module and the dosage of the medicament flocculating and settling module through a mathematical model according to the water turbidity measured by the inlet water turbidity detection sensor and the water flow measured by the inlet water flow meter, and correcting the parameters of the mathematical model according to the outlet water turbidity measured by the outlet water turbidity detection sensor;
the dosing controller comprises a control frequency converter, and the control frequency converter is used for controlling the power of the first dosing pump and the power of the second dosing pump respectively according to the dosing amount of the medicament mixing module and the dosing amount of the medicament of the flocculation precipitation module.
8. A resource recycling method of wastewater containing a snow-melting agent, which utilizes the resource recycling system of wastewater containing the snow-melting agent according to any one of claims 1 to 8, and is characterized by comprising the following steps:
adding wastewater into a medicament mixing module, adding a coagulant into the medicament mixing module, and quickly mixing the coagulant with the wastewater;
introducing the mixed wastewater into a flocculation precipitation module, adding a flocculating agent into the flocculation precipitation module, and then standing for precipitation;
and (3) introducing the wastewater subjected to standing precipitation into a mechanical filtration module, and then discharging the treated water.
9. The recycling system of the wastewater containing the snow-melting agent as claimed in claim 8, further comprising:
monitoring the water inlet turbidity and the water inlet flow of the medicament mixing module and the water outlet turbidity of the flocculation precipitation module;
and calculating the adding amount of the coagulant and the flocculant according to the inlet water turbidity and the inlet water flow of the medicament mixing module and the outlet water turbidity of the flocculation precipitation module.
10. The resource recycling method of the wastewater containing the snow-melting agent according to claim 8, further comprising:
and backwashing the mechanical filter module by using the treated water according to a set time interval.
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