CN211419907U - Automobile parts finished product and/or raw and other materials wash waste water treatment recycling system - Google Patents

Abstract

The utility model provides an automobile parts finished product and/or raw and other materials wash waste water treatment recycling system. The system for treating and recycling the automobile part finished product and/or raw material cleaning wastewater comprises a coagulation air flotation device, a coagulation sedimentation device, a first filter, an evaporation device, a heat exchange device, a biochemical device, an advanced oxidation device, a biological aerated filter, a second filter, an ultrafiltration device, an activated carbon filter, a reverse osmosis device, an ion exchange device, a sterilization device and a filtering device which are sequentially communicated by fluid. The utility model discloses wash waste water to automobile parts finished product and/or raw and other materials and carry out the advanced treatment and reuse in the washing of automobile parts finished product and/or raw and other materials, replaced original pure water processing system device to reach energy saving and emission reduction's purpose, and finished product and/or raw and other materials surface after this quality of water washs does not have bad quality such as white spot, water mark.

Description

Automobile parts finished product and/or raw and other materials wash waste water treatment recycling system

Technical Field

The utility model belongs to the waste water treatment field relates to an automobile parts finished product and/or raw and other materials washing wastewater treatment recycling system.

Background

The cleaning wastewater for finished automobile aluminum parts contains hydrocarbon cleaning solvent (containing decaalkane-undecane) for surface treatment of finished automobile parts in a processing workshop, cooling cutting fluid (containing mineral oil, a mixture of a nonionic emulsifier, an antirust additive and the like), a special cleaning agent for aluminum alloy (containing triethanolamine oleate soap, polyether (L61), an alcohol ether solvent), a low-foam antirust cleaning agent (containing coconut oil fatty acid diethanolamide (6501), polyether (L61) and an alcohol ether solvent), an alkaline cleaning agent (containing potassium hydroxide), grinding fluid (containing nonylphenol polyoxyethylene 6 ether, fatty glyceride, triethanolamine lauryl sulfate, sodium citrate and sodium sulfite), triethanolamine, a P15T aqueous antirust liquid (containing a surfactant, a corrosion inhibitor, an antirust agent and the like), suspended matters in wet dedusting wastewater and the like. The machining cutting fluid cooling liquid wastewater is a relatively headache problem in the water treatment industry due to the characteristics of high COD concentration, complex components, poor biodegradability and the like, and in recent years, the machining cleaning wastewater yield is increased day by day, the treatment difficulty is increased, and the problem of environmental pollution is serious day by day, so a feasible method is found for treatment. At present, the processing method of the oily wastewater from the cleaning of machining parts mainly comprises physical method, chemical method, physical-chemical method, biological treatment, precipitation method and the like. The physical methods are further classified into gravity separation, centrifugal separation, coarse granulation, filtration (membrane separation), and the like. The chemical methods mainly include a coagulation method and a salting-out method. The physicochemical method is mainly a flotation method (air flotation method). The wastewater can generally reach DB12/356-2018 Integrated wastewater discharge Standard after treatment, or the treated water is reused for washing the ground, washing cars, greening, landscape water and the like. However, the recycling requirement is necessarily realized without a discharge port in environmental evaluation of machining enterprises in certain industrial parks, the requirement of reclaimed water for greening irrigation and toilet flushing which are actually used for recycling is not large, and the practical advantage of water saving is very limited. Therefore, if the treated water is recycled to the production line cleaning water of finished parts, the use and the meaning of the water are far more than greening irrigation and toilet flushing.

The cleaning wastewater of the finished product of the automobile aluminum part is recycled after being treated until the requirement of the cleaned finished product on water quality is higher and approaches the requirement of pure water, so that the difficulty of treatment and recycling is increased. This is because COD in the raw water_crHas high content, and contains ammonia nitrogen, salt, oil, etc. COD_crThe fluctuation is large between 4000 and 10000 mg/L. The conductivity of the raw water is about 1529-3000 us/cm, and the final water production requirement is<5us/cm, 58-200 mg/L of raw water chloride ions, and about 0 percent of final water production requirement. The raw water petroleum content is subjected to sampling detection, the content is about 350-500 mg/L, the oil content is high, and the desalting treatment process is adopted in the later-stage process, so that the desalting treatment effect is greatly influenced by the petroleum, the normal use of equipment is influenced, and the service life of the equipment is shortened. After the cleaning wastewater is treated by the system, substances which cannot be removed by the treatment device are recycled by the system, the water quality is continuously deteriorated, and necessary treatment measures are required to be taken to thoroughly remove the substances. By combining the conditions, the part cleaning wastewater needs an effective advanced recycling treatment process to meet the requirement of finally recycling for cleaning finished workpieces, so that the effect of cleaning the finished workpieces is ensured, the requirements of zero discharge and recycling of the cleaning wastewater are met, the requirements of energy conservation, emission reduction and environmental evaluation on enterprises are met, the sustainable development of the enterprises is ensured, and better social benefit, economic benefit and ecological benefit are achieved.

SUMMERY OF THE UTILITY MODEL

In view of the above-mentioned shortcomings of the prior art, the present invention is directed to a system for treating and recycling waste water from cleaning of finished automobile parts and/or raw materials. The system for treating and recycling the automobile part finished product and/or raw material cleaning wastewater comprises a coagulation air flotation device, a coagulation sedimentation device, a first filter, an evaporation device, a heat exchange device, a biochemical device, an advanced oxidation device, a biological aerated filter, a second filter, an ultrafiltration device, an activated carbon filter, a reverse osmosis device, an ion exchange device, a sterilization device and a filtering device which are sequentially communicated by fluid. The utility model carries out advanced treatment on the cleaning wastewater of the finished products and/or raw materials of the automobile parts and recycles the cleaning wastewater for the finished products and/or raw materials of the automobile parts, replaces the original pure water treatment system device, so as to achieve the purposes of energy conservation and emission reduction, and the surfaces of the finished products and/or raw materials after being cleaned by the water have no bad quality such as white spots, water marks and the like; the conventional daily water replenishing treatment process for cleaning water is improved through the process, so that a finished workpiece cleaning production line system can still normally run after the reclaimed water subjected to advanced treatment is adopted as the water replenishing of the workpiece cleaning production line, and the cleaning effect and the clean appearance of the product are ensured.

In order to achieve the above objects and other related objects, the present invention provides a system for treating and recycling waste water from cleaning automobile parts and/or raw materials, comprising a coagulation-air flotation device, a coagulation-sedimentation device, a first filter, an evaporation device, a heat exchange device, a biochemical device, an advanced oxidation device, a biological aerated filter, a second filter, an ultrafiltration device, an activated carbon filter, a reverse osmosis device, an ion exchange device, a sterilization device and a filtration device which are sequentially communicated with each other.

Preferably, at least one of the following technical features is also included:

1) the coagulation air floatation device comprises a first coagulation reaction unit and an air floatation unit which are sequentially in fluid communication; the air flotation unit can be dissolved air flotation or cavitation air flotation;

2) the coagulating sedimentation device comprises a second coagulating reaction unit and a sedimentation unit which are sequentially in fluid communication; the precipitation unit can be an inclined plate precipitation unit, a horizontal flow precipitation unit or a vertical flow precipitation unit;

3) the precision of a filter element of the first filter is 50um-1000 um;

4) the first filter is a bag filter element filter or a folded filter element filter;

5) the evaporation device comprises a first evaporation concentrator, or a first evaporation concentrator and a second evaporation concentrator which are sequentially communicated in a fluid mode; when the evaporation device comprises the first evaporation concentrator and the second evaporation concentrator, the first filter is sequentially in fluid communication with the first evaporation concentrator and the second evaporation concentrator, and the first evaporation concentrator and the second evaporation concentrator are respectively in fluid communication with the heat exchange device; the first evaporation concentrator and the second evaporation concentrator are vacuum evaporation concentration devices, can be low-temperature vacuum evaporation concentration devices or high-temperature vacuum evaporation concentration devices, preferably low-temperature vacuum evaporation concentration devices, and the evaporation temperature range of the low-temperature vacuum evaporation concentration devices is as follows: the evaporation temperature of the high-temperature vacuum evaporation concentration device is between 30 and 45 ℃, and the range of the evaporation temperature of the high-temperature vacuum evaporation concentration device is between 80 and 90 ℃;

6) the biological device is an A/O-MBR membrane bioreactor or an MBR membrane bioreactor; the MBR membrane bioreactor adopts an inorganic membrane or an organic membrane, is a flat membrane or a hollow fiber membrane, and has a pore size of 0.001-0.02 micron;

7) the biochemical device comprises an A/O biochemical pool, a coagulation pool and a sedimentation pool which are sequentially in fluid communication;

8) the advanced oxidation device is an ozone advanced oxidation device, or an ozone advanced oxidation and catalyst combined reaction device, or an ozone and hydrogen peroxide combined reaction device, or a Fenton advanced oxidation device, or an iron-carbon micro-electrolysis oxidation device;

9) the biological aerated filter is an upper-inlet lower-outlet type biological aerated filter or a lower-inlet upper-outlet type biological aerated filter;

10) the second filter is one or a combination of a quartz sand filter, a multi-medium filter, a variable gap filter, a laminated filter and a bag filter;

11) the filtering membrane in the ultrafiltration device is an organic filtering membrane or an inorganic filtering membrane;

12) a safety filter is arranged in front of the reverse osmosis device;

13) the reverse osmosis membrane in the reverse osmosis device is made of aromatic polyamide;

14) the reverse osmosis device adopts an anti-pollution reverse osmosis membrane core;

15) the reverse osmosis membrane in the reverse osmosis device adopts a roll type reverse osmosis membrane module or a DTRO butterfly tube type membrane module;

16) the ion exchange device is a cation-anion mixed bed ion exchange device or a polishing mixed bed ion exchange device;

17) the mixed bed ion exchange device is composed of an anion exchange bed unit and a cation exchange bed unit which are connected in series;

18) the precision of a filter element of the filter device is 0.1-0.2 mu m;

19) the filtering device is a folding filter element filtering device;

20) the system for treating and recycling the finished automobile part product and/or raw material cleaning wastewater also comprises a sludge dewatering device, wherein the coagulation air flotation device, the coagulation sedimentation device and the biochemical device are communicated with the sludge dewatering device and are used for dewatering the sludge generated by the coagulation sedimentation device, the scum generated by the coagulation air flotation device and the sludge generated by the biochemical device;

21) the system for treating and recycling the finished automobile part product and/or raw material cleaning wastewater also comprises a nutrient adding device, and is used for adding a nutrient to the biochemical device;

22) the system for treating and recycling the automobile part finished product and/or raw material cleaning wastewater further comprises a non-oxidizing bactericide and reducing agent adding device, and the non-oxidizing bactericide and reducing agent adding device is used for adding the non-oxidizing bactericide and the reducing agent into a pipeline communicated with the activated carbon filter and the reverse osmosis device.

More preferably, in the feature 1), the air flotation unit is a dissolved air flotation or a cavitation air flotation.

More preferably, in the feature 11), the material of the filtration membrane is selected from one of polysulfone, polyvinylidene fluoride, polyvinyl chloride and ceramic membrane.

More preferably, the ultrafiltration membrane is made of polyvinylidene fluoride (PVDF).

More preferably, in feature 12), at least one of the following technical features is further included:

1) the precision of the filter element of the security filter is 0.1-100 μm;

2) the cartridge filter is a filter element type filter or a filter bag type filter.

More preferably, in the feature 8), the ozone advanced oxidation apparatus includes an ozone generation unit and an ozone reaction unit, the ozone reaction unit is provided between the biochemical apparatus and the biological aerated filter, and the ozone generation unit is in fluid communication with the ozone reaction unit for supplying ozone to the ozone reaction unit.

Further more preferably, at least one of the following technical features is also included:

1) the ozone reaction unit is a micro-nano bubble generator, a microporous aeration disc aeration reactor, a multipoint feeding plug-flow type tubular reactor, an ejector dissolved air aeration reactor or a dissolved air pump circulating reactor, and is preferably a micro-nano bubble generator, so that ozone is utilized to the maximum, the CODcr of effluent is greatly reduced, and the removal rate is about 30-70%;

2) still include the hydrogen peroxide pipeline or locate the ultraviolet irradiation unit, the hydrogen peroxide pipeline communicates with ozone reaction unit, the ultraviolet irradiation unit is located in the ozone reaction unit or establish ties.

The utility model discloses in adopt evaporation plant like vacuum evaporation concentration device, can be low temperature vacuum evaporation concentration device or high temperature vacuum evaporation concentration device, preferred low temperature vacuum evaporation concentration device, low temperature vacuum evaporation concentration device evaporating temperature scope does: the evaporation temperature range of the high-temperature vacuum evaporation concentration device is 30-45 ℃, the evaporation temperature range is 80-90 ℃, preferably, the evaporation device comprises a first evaporation concentrator and a second evaporation concentrator, the evaporation device has an excellent treatment effect on removing oil, salt, organic matters, suspended matters and the like in the cleaning wastewater, after evaporation treatment, according to the change range of CODcr in inlet water of 2000-1000 mg/l, the CODcr of outlet water is within the range of 50-700 mg/l, and when the inlet water of the oil is about 350mg/l, the oil content of the outlet water is 5-30 mg/l.

Through the utility model discloses automobile parts finished product and/or raw and other materials wash waste water treatment recycling system, the water index can reach the well water moisturizing water quality requirement of this automobile parts manufacturing plant, can directly regard as the finished product of automobile parts manufacturing plant and raw and other materials to wash the production line make-up water and use, finished product and raw and other materials surface after this water quality washs do not have the white spot, bad quality such as water mark, former pure water processing system device only is used for the use of a small amount of supplementary moisturizing as washing the production line, a useless handling capacity of danger outside the commission in the processing procedure for replenishing washing waste water, the water balance and the good operation of washing production line cyclic utilization have been guaranteed.

The utility model discloses a main processing object is useless emulsion, metal surface cleaning wastewater and dust removal waste water, collects the concentrated storage through the pipeline at present and has had industrial waste water collection pond in the mill, and main pollutant is oils, surfactant, cleaner and heavy metal, and organic matter concentration is high, pH value is high, and CODcr is about 10000mg/L, and oil is about 350 ~ 500 mg/L. The main pollutant in the wet dust removal wastewater is SS, which is about 1000mg/L and contains aluminum, tin and metal oxide dust thereof. The wastewater is difficult to carry out biochemical treatment, needs advanced treatment to meet the requirement of reuse water, and the reuse water is used for cleaning water of aluminum finished workpieces and then is recycled in a system, so that the water consumption is greatly saved, and the discharge amount of industrial wastewater is reduced to the maximum extent.

The utility model discloses well waste water pollution concentration is high, and the processing requirement is strict, to high concentration organic chemistry waste water to materialization, evaporation, biochemistry, activated carbon adsorption, advanced oxidation, reverse osmosis, ion exchange are handled as main treatment means. The utility model discloses industrial waste water after will mixing reaches the deoiling effect through coagulating air supporting, then adopts the coagulating sedimentation to get rid of heavy metal material. Toxic and harmful substances and organic pollutants in the wastewater sequentially subjected to coagulation air flotation, coagulation sedimentation and pretreatment are greatly reduced, a subsequent treatment process is to remove the residual organic pollutants by surrounding degradation and further carry out advanced treatment to enable the residual organic pollutants to reach the requirement of reuse water, and the subsequent treatment process is to select a first filter, an evaporation device, a heat exchange device, a biochemical device, an advanced oxidation device, an aeration biological filter, a second filter, an ultrafiltration device, an activated carbon filter, a reverse osmosis device, an ion exchange device, a sterilization device and a filtering device for treatment and reuse. Waste water organic matter and other pollutant greatly reduced after this utility model handles has guaranteed that play water quality of water is stable up to standard, and safe and reliable has satisfied the strict requirement of the washing water of finished product work piece.

The water quality after the treatment of the utility model is as follows: the pH value is about 6-9, the turbidity of effluent is less than 1NTU, CODcr is less than 10mg/L, the conductivity is less than 3us/cm, total nitrogen is less than 0.4mg/L, total phosphorus is not detected, and petroleum is less than 0.2 mg/L. The water quality of the inlet and outlet water is shown in the following table 1.

Table 1: index of water quality treatment effect of wastewater inlet and outlet

Serial number	Index (I)	Unit of	Quality index of inlet water	Water quality index of produced water
					1	pH value	-	6-12	6～9
2	Electrical conductivity of	us/cm	<3000	<3
					3	CODcr	mg/L	<10000	<10
4	SS	mg/L	<1000	<1
					5	Chloride ion	mg/L	<200	ND
6	T-N	mg/L	<200	<0.4
					7	T-P	mg/L	<50	ND
8	Petroleum products	mg/L	<500	<0.2

The system for treating and recycling the cleaning wastewater of the finished products and/or raw materials of the middle automobile parts is shown in figure 1 and figure 2.

The utility model overcomes the defects in the prior water reuse process in similar wastewater treatment, provides an optimized advanced treatment process, carries out advanced treatment on industrial cleaning wastewater discharged from automobile parts and recycles the industrial cleaning wastewater for cleaning finished workpieces, replaces the original pure water treatment system device, and achieves the purposes of energy conservation and emission reduction; the conventional daily water replenishing treatment process for cleaning water is improved through the process, so that after the reclaimed water subjected to advanced treatment is adopted as the water replenishing for the workpiece cleaning production line, a finished workpiece cleaning production line system can still normally run, the cleaning effect and the clean appearance of the product are ensured, and excellent quality reputation is won for customers.

Along with the improvement of production capacity, the discharge amount of industrial wastewater is gradually increased year by year, and the cost of wastewater outsourcing treatment is increased, so that the company plans to construct a set of water treatment facility with advanced technology, simple and convenient operation and management and stable operation, aims to ensure that the wastewater can be recycled through advanced treatment, saves 8000 tons of water every year, reduces the treatment amount of dangerous wastewater by about 7750 tons, reduces the cost of the outsourcing treatment, eliminates the environmental risk of the industrial wastewater as hazardous waste for the outsourcing treatment, reduces the pollution to the environment, achieves the aim of maximizing energy conservation and emission reduction, and obtains good economic benefit, social benefit and ecological benefit.

Drawings

FIG. 1 is a first view of a system for treating and recycling waste water from cleaning finished products and/or raw materials of automobile parts.

FIG. 2 is a second view of a system for treating and recycling the washing wastewater of finished products and/or raw materials of automobile parts.

Reference numerals

010 coagulation air flotation device

011 first coagulation reaction unit

012 air floatation unit

020 coagulating sedimentation device

021 second coagulation reaction unit

022 precipitation unit

030 first Filter

040 evaporating device

041 first evaporation concentrator

042 second evaporation concentrator

050 heat exchange device

060 biochemical device

070 advanced oxidation device

080 biological aerated filter

090 second Filter

100 ultrafiltration device

110 activated carbon filter

120 reverse osmosis device

130 ion exchange device

140 sterilizing device

150 filter device

160 safety filter

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the structure, ratio, size and the like shown in the drawings attached to the present specification are only used for matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and are not used for limiting the limit conditions that the present invention can be implemented, so that the present invention has no technical essential meaning, and any structure modification, ratio relationship change or size adjustment should still fall within the scope that the technical content disclosed in the present invention can cover without affecting the function that the present invention can produce and the purpose that the present invention can achieve. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be made without substantial technical changes, and the present invention is also regarded as the scope of the present invention.

A system for treating and recycling cleaning wastewater of finished automobile parts and/or raw materials comprises a coagulation air flotation device 010, a coagulation sedimentation device 020, a first filter device 030, an evaporation device 040, a heat exchange device 050, a biochemical device 060, an advanced oxidation device 070, an aeration biological filter 080, a second filter 090, an ultrafiltration device 100, an activated carbon filter 110, a reverse osmosis device 120, an ion exchange device 130, a sterilization device 140 and a filtering device 150 which are sequentially in fluid communication with one another.

In a preferred embodiment, the coagulation and flotation device 010 comprises a first coagulation reaction unit 011 and a flotation unit 012 which are sequentially and fluidly connected.

In a preferred embodiment, the coagulation sedimentation device 020 comprises a second coagulation reaction unit 021 and a sedimentation unit 022 which are sequentially in fluid communication.

In a preferred embodiment, the air flotation unit 012 is a dissolved air flotation or a cavitation air flotation.

In a preferred embodiment, the evaporation device 040 comprises a first evaporative concentrator 041, or a first evaporative concentrator 041 and a second evaporative concentrator 042 in sequential fluid communication; when said evaporation means 040 comprises said first evaporative concentrator 041 and said second evaporative concentrator 042, said first filter 030 is in turn in fluid communication with said first evaporative concentrator 041 and said second evaporative concentrator 042, which first evaporative concentrator 041 and said second evaporative concentrator 042 are in turn in fluid communication with said heat exchange means 050, respectively; the first evaporation concentrator and the second evaporation concentrator are vacuum evaporation concentration devices, can be low-temperature vacuum evaporation concentration devices or high-temperature vacuum evaporation concentration devices, preferably low-temperature vacuum evaporation concentration devices, and the evaporation temperature range of the low-temperature vacuum evaporation concentration devices is as follows: 30-45 ℃ and the evaporation temperature range of the high-temperature vacuum evaporation concentration device is 80-90 ℃.

In a preferred embodiment, the filtering membrane of the ultrafiltration device 100 is an organic filtering membrane or an inorganic filtering membrane

In a preferred embodiment, the material of the filter membrane is selected from one of polysulfone, polyvinylidene fluoride, polyvinyl chloride and ceramic membrane.

In a preferred embodiment, the material of the filtering membrane is polyvinylidene fluoride (PVDF).

In a preferred embodiment, the reverse osmosis unit 120 is preceded by a cartridge filter.

In a preferred embodiment, the cartridge accuracy of the cartridge filter is between 0.1 μm and 100 μm.

In a preferred embodiment, the cartridge filter is a cartridge filter or a bag filter.

In a preferred embodiment, the material of the reverse osmosis membrane in the reverse osmosis device 120 is aromatic polyamide.

In a preferred embodiment, the reverse osmosis device 120 employs an anti-pollution type reverse osmosis membrane core, which is more anti-pollution and stable in operation.

In a preferred embodiment, the reverse osmosis membrane in the reverse osmosis unit 120 is a roll-type reverse osmosis membrane module or a DTRO butterfly tube type membrane module, which is more resistant to organic pollution.

In a preferred embodiment, the ozone advanced oxidation device comprises an ozone generating unit and an ozone reaction unit, the ozone reaction unit is arranged between the biochemical device 060 and the biological aerated filter 080, and the ozone generating unit is in fluid communication with the ozone reaction unit and is used for conveying ozone to the ozone reaction unit.

In a preferred embodiment, the ozone reaction unit is a micro-nano bubble generator, a microporous aeration disc aeration reactor, a multipoint feeding plug flow type tubular reactor, an ejector dissolved air aeration reactor or a dissolved air pump circulating reactor, and is preferably a micro-nano bubble generator, so that ozone is maximally utilized, the CODcr of effluent is greatly reduced, and the removal rate is about 30-70%.

In a preferred embodiment, the mixed bed ion exchange unit 130 is a mixed anion and cation bed ion exchange unit or a polished mixed bed ion exchange unit.

In a preferred embodiment, the mixed bed ion exchange unit 130 is an anion exchange bed unit and a cation exchange bed unit in series.

In a preferred embodiment, the filter device 150 has a filter element precision of 0.1 to 0.2 μm.

In a preferred embodiment, the filter device 150 is a pleated cartridge filter device.

In a preferred embodiment, the system for treating and recycling the finished and/or raw material cleaning wastewater of the automobile parts further comprises a sludge dewatering device, and the coagulation air flotation device 010, the coagulation sedimentation device 020 and the biochemical device 060 are communicated with the sludge dewatering device and are used for dewatering scum and sludge generated by the coagulation air flotation device, sludge generated by the coagulation sedimentation device and sludge generated by the biochemical device.

In a preferred embodiment, the system for treating and recycling the finished automobile part and/or raw material cleaning wastewater further comprises a nutrient adding device, which is used for adding a nutrient to the biochemical device 060.

In a preferred embodiment, the system for treating and recycling the finished automobile part products and/or raw material cleaning wastewater further comprises a non-oxidizing bactericide and reducing agent adding device, which is used for adding the non-oxidizing bactericide and the reducing agent into a pipeline communicating the activated carbon filtering device 110 and the reverse osmosis device 120.

Example 1

The former 1 waste water treatment station of establishing of certain large-scale joint venture car axle bush manufacturing plant in domestic, the washing waste water that mainly handles axle bush raw and other materials and finished product washing production line and discharge, wet-type dust removal waste water etc, the former water that should wash the production line adopts the current pure water system's of factory district product water as the moisturizing source, the quality of reclaimed water after this washing waste water treatment is difficult to satisfy the water requirement that axle bush raw and other materials and finished product washing production line washd water, this industrial park has strict restriction again to the industrial waste water blowdown total amount of this enterprise, if excessive standard exceeding discharges will directly influence the production operation of this enterprise, so need newly-built 1 set of waste water degree of depth recycling system suddenly, the quality of water after the processing can satisfy axle bush raw and other products and wash water quality requirement, the water quantity can be made suitable supplementary with former pure water system product water when not enough, this washing waste water through washing production line constantly is through newly-built waste water degree of depth The recycling system carries out recycling, thereby reducing the produced water replenishing of the original pure water system and reducing the discharge of industrial wastewater.

Newly-built washing waste water advanced treatment recycling system (promptly the utility model discloses automobile parts finished product and/or raw and other materials washing waste water treatment recycling system) throughput is about 8000m³The system comprises a coagulation air floatation device 010, a coagulation sedimentation device 020, a first filter 030, an evaporation device 040, a heat exchange device 050, a biochemical device 060, an advanced oxidation device 070, a biological aerated filter 080, a second filter 090, an ultrafiltration device 100, an activated carbon filter 110, a reverse osmosis device 120, an ion exchange device 130, a sterilization device 140 and a filtering device 150 which are sequentially in fluid communication. The evaporation device 040 includes a first evaporation concentrator 041 and a second evaporation concentrator 042, the first filter 030 is sequentially in fluid communication with the first evaporation concentrator 041 and the second evaporation concentrator 042, and the first evaporation concentrator 041 and the second evaporation concentrator 042 are respectively in fluid communication with the heat exchange device 050. The wastewater treatment process comprises the following steps: coagulation air flotation + coagulation sedimentation → filtration treatment → evaporation (first evaporation treatment and second evaporation treatment) → heat exchange treatment → biochemical treatment → advanced oxidation → biochemical treatment → filtration treatment → ultrafiltration filtration → active carbon filtration → reverse osmosis desalination treatment → mixed ion exchange treatment → sterilization treatment → filtration treatment → final water production, which satisfies the water quality requirements of bearing bush raw materials and cleaning water of a finished product cleaning production line, wherein the water obtained after filtration treatment is subjected to first evaporation concentration treatment to respectively obtain first distilled water and first concentrated solution; carrying out second evaporation concentration treatment on the first concentrated solution to respectively obtain second distilled water and second concentrated solution; and carrying out heat exchange treatment on the first distilled water and the second distilled water.

Cleaning wastewater advanced treatment recycling system (namely the utility model discloses automobile parts finished product and/or raw and other materials are clearA washing wastewater treatment and recycling system) is shown in figure 1. Waste water discharged by a cleaning production line is collected by a waste water pond and then is conveyed by a water inlet pump, the number of the water inlet pumps is 2, 1 is 1, and the flow of each water pump is 2m³H is used as the reference value. The method comprises the steps of conveying wastewater to a coagulation and floatation device 010 and a coagulant by a raw water pump, coagulating and then precipitating the wastewater, wherein the coagulation and floatation device 010 comprises a first coagulation reaction unit 011 and a gas floatation unit 012 which are sequentially communicated by fluid, the first coagulation reaction unit 011 is provided with a coagulation tank and a flocculation tank, the gas floatation unit 012 is dissolved air floatation, the first coagulation reaction unit 011 comprises a coagulation dosing component, the coagulation tank is provided with 1 feeding point of polyaluminium chloride PAC or polyferric sulfate in the first coagulation reaction unit 011, 2 dosing pumps are implemented by the polyaluminium chloride PAC or the polyferric sulfate and are dosed with the polyaluminium chloride PAC (1 is used for 1), the dosing amount is about 50-100 mg/L, the flocculation tank is provided with 1 feeding point of polyacrylamide PAM in the first coagulation reaction unit 011, and 2 dosing pumps are implemented by the polyacrylamide PAM (1 is used for 1), the adding amount is about 5-10 mg/L, so that the wastewater enters dissolved air floatation for treatment after coagulation reaction. The purpose of adding polyaluminium chloride PAC is to remove organic substances and SS in water through the actions of four aspects of compression double electric layers of the polyaluminium chloride PAC or hydrolysate thereof, electric neutralization, winding belt net capture, adsorption bridging and the like, and importantly, petroleum substances in raw water are removed. The purpose of adding polyacrylamide PAM is to form larger flocs between particles so that the flocs are convenient to settle. The method comprises the following steps that the effluent of dissolved air floatation enters a coagulating sedimentation device, COD (chemical oxygen demand) particulate matter and SS (suspended substances) are precipitated, and tiny particles are made to produce larger particulate matter and precipitate, the coagulating sedimentation device 020 comprises a second coagulating reaction unit 021 and a sedimentation unit 022 which are sequentially in fluid communication, the second coagulating reaction unit 021 is provided with a coagulation tank and a flocculation tank, the second coagulating reaction unit 021 comprises a coagulating medicine adding part, and polyaluminium chloride (PAC (the adding amount is about 50-100 mg/L) and Polyacrylamide (PAM) medicine (the adding amount is about 5-10 mg/L) are respectively added to the coagulating sedimentation device to act as the coagulating floatation device; PAC and PAM may be dosed in lower amounts than the former. The precipitated water is filtered by the filter 030 and then enters the evaporator device 040 for evaporation concentration treatment, and the first evaporation isThe concentrator and the second evaporation concentrator are low-temperature vacuum evaporation concentration devices, and the evaporation temperature ranges are as follows: 30-45 ℃ and the treatment capacity of 1.5m³The concentrated solution after evaporation is less than 5%, the concentrated solution is treated as hazardous waste, the filtered water body is subjected to first evaporation concentration treatment to respectively obtain first distilled water and first concentrated solution, and the first concentrated solution is subjected to second evaporation concentration treatment to respectively obtain second distilled water and second concentrated solution; cooling the first distilled water and the second distilled water by a heat exchange device 050, then feeding the cooled first distilled water and the second distilled water into a biochemical device for biochemical treatment 060, wherein the temperature of the distilled water is about 30-45 ℃, and cooling the distilled water by a heat exchange device 50 before feeding the cooled distilled water into the biochemical device 060 until the temperature is reduced to about 30 ℃; the CODcr index in the evaporated waste water is greatly reduced, about<500 mg/l; the biochemical treatment of the distilled water by the biochemical device 060 mainly has the functions of further degrading organic substances in the water and reducing CODcr; however, the content of N, P in the evaporated distilled water is less, N, P and other nutrients need to be supplemented, 1 set of nutrient adding devices are configured, the nutrients are added into the biochemical device 060, biological sludge is cultured, no microorganism is required to lack nutrients, and 2 medicine adding pumps are used (1 is used for 1). The CODcr in the produced water (which can be buffered in a production water tank) of the biochemical device 060 will be reduced to 10-150 mg/l; the water produced by the biochemical device is conveyed into an advanced oxidation device 070 for treatment by a water production pump, mainly for further degrading organic substances in the water and reducing CODc to less than 100 mg/l; the produced water of the advanced oxidation device 070 overflows into the biological aerated filter 080 for biochemical treatment, the produced water of the biological aerated filter 080 is cached in an intermediate water tank, the produced water is sent into a second filter 090 and an ultrafiltration device 100 for filtration treatment by a lift pump, the produced water is cached in the intermediate water tank and is conveyed to an activated carbon filter 110 by the lift pump (1 for 1), the activated carbon filters run in parallel (1 for 1), and the filtration flow of each filter is 2m³The flow velocity design is that the flow velocity is 8-16 m/h, and the height of the filtering layer is 1-1.2 m. The effluent of the activated carbon filter 110 enters a reverse osmosis device 120 for reverse osmosis desalination treatment, a filter element type cartridge filter 160 is arranged in front of the reverse osmosis device 120, the filtration precision is 5um, and the filtration flow is 2m³H, prevention of large-particle impurities, e.g. leaking activated carbon, etcThe impurities entering the reverse osmosis unit 120 cause the membrane to clog or be damaged. The cartridge filter cartridge type cartridge filter outputs water into the reverse osmosis unit 120. The reverse osmosis device 120 can remove organic matters with molecular weight more than 100, and can also partially filter out soluble organic matters, and the effects of removing salt and reducing conductivity are achieved; therefore, the reverse osmosis device 120 is adopted to reduce the conductivity, simultaneously, the CODcr in water can be further reduced, and in order to avoid the oxidation and pollution of inflow water to reverse osmosis, a non-oxidizing bactericide and a reducing agent adding device are arranged behind the activated carbon filtering device 110 in front of the security filter and the reverse osmosis device 120, namely on a pipeline connecting the activated carbon filtering device 110 and the security filter; the CODcr in the effluent of the reverse osmosis device 120 is reduced to 10-30 mg/l; the conductivity is 5-10 us/cm. The produced water of the reverse osmosis device 120 enters an ion exchange device 130 for mixed bed ion treatment, 2 mixed bed ion exchange devices are respectively arranged and run in parallel (1 is used for 1), and each filtering flow is 2m³The flow velocity is designed according to the flow velocity of 20-40 m/h, the height of a filtering layer is 1-1.2 m, and the effect is to further reduce the conductivity in water to enable the conductivity to be less than 5 us/cm; the water produced by the ion exchange device is treated by a sterilizing device 140, such as an ultraviolet sterilizing device, in order to kill bacteria breeding in the water; the water sterilized by the sterilizer 140 is filtered by the filter 150 to remove bacteria and residual SS; the final produced water (which can be stored in a final water tank) is sent to the production line by a final water pump to be used as cleaning water. Sludge that the sedimentation tank produced among the coagulating sedimentation device carries out dehydration treatment, and dross and sludge that the air supporting produced among the coagulating sedimentation device carry out dehydration treatment, and the sludge that biochemical treatment produced among the biochemical devices carries out dehydration treatment, and the sludge impounds in the above-mentioned dross and sludge can arrange the medicament into the sludge impoundment device, then handles the medicine back through mud, carries through the sludge pump and gets into the sludge dewaterer and dewater.

In this embodiment, the main devices of the advanced treatment and recycling system for cleaning wastewater (i.e., the system for treating and recycling automobile part finished products and/or raw material cleaning wastewater) are summarized as shown in table 2 below.

TABLE 2 major equipment involved in recycling systems

This washing waste water advanced treatment recycling system (promptly the utility model discloses automobile parts finished product and/or raw and other materials washing waste water treatment recycling system) drops into the operation back, goes out water stable in quality of water, and each item index is as follows 3:

table 3: index of water quality treatment effect of wastewater inlet and outlet

After the cleaning production line of the automobile part manufacturing plant operates, equipment of each process section operates well, no white spots and water stains exist on the surfaces of parts washed by the cleaning water production line by using the recycled water, and the appearance sense is excellent; the quality of the product and the customer satisfaction are ensured. Meanwhile, the total amount and cost of hazardous waste disposal of the enterprise are reduced, and the total amount of industrial wastewater discharge of the enterprise is reduced to the maximum extent; contributes to energy conservation and emission reduction and establishes good enterprise image.

To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. The system for treating and recycling the cleaning wastewater of the finished automobile parts and/or the raw materials is characterized by comprising a coagulation air flotation device (010), a coagulation sedimentation device (020), a first filter (030), an evaporation device (040), a heat exchange device (050), a biochemical device (060), an advanced oxidation device (070), a biological aerated filter (080), a second filter (090), an ultrafiltration device (100), an activated carbon filter (110), a reverse osmosis device (120), an ion exchange device (130), a sterilization device (140) and a filtering device (150) which are sequentially in fluid communication.

2. The system for treating and recycling the washing wastewater of the finished products and/or raw materials of the automobile parts according to claim 1, further comprising at least one of the following technical features:

1) the coagulation air floatation device (010) comprises a first coagulation reaction unit (011) and an air floatation unit (012) which are sequentially in fluid communication;

2) the coagulating sedimentation device (020) comprises a second coagulating reaction unit (021) and a sedimentation unit (022) which are sequentially communicated with each other in a fluid mode;

3) the filter element precision of the first filter (030) is 50-1000 um;

4) the first filter is a bag filter element filter or a folded filter element filter;

5) the evaporation device (040) comprises a first evaporative concentrator (041), or a first evaporative concentrator (041) and a second evaporative concentrator (042); when said evaporation means (040) comprise said first evaporative concentrator (041) and said second evaporative concentrator (042), said first filter (030) is in fluid communication with said first evaporative concentrator (041) and said second evaporative concentrator (042) in sequence, said first evaporative concentrator (041) and said second evaporative concentrator (042) being in further fluid communication with said heat exchange means (050), respectively;

6) the biochemical device (060) is an A/O-MBR membrane bioreactor or an MBR membrane bioreactor;

7) the biochemical device (060) comprises an A/O biochemical tank, a coagulation tank and a sedimentation tank which are sequentially in fluid communication;

8) the advanced oxidation device (070) is an ozone advanced oxidation device, or an ozone advanced oxidation and catalyst combined reaction device, or an ozone and hydrogen peroxide combined reaction device, or a Fenton advanced oxidation device, or an iron-carbon micro-electrolysis oxidation device;

9) the biological aerated filter (080) is an upper-inlet lower-outlet type biological aerated filter or a lower-inlet upper-outlet type biological aerated filter;

10) the second filter (090) is one or more of a quartz sand filter, a multi-media filter, a variable gap filter, a laminated filter and a bag filter;

11) the filtering membrane in the ultrafiltration device (100) is an organic filtering membrane or an inorganic filtering membrane;

12) a security filter (160) is arranged in front of the reverse osmosis device (120);

13) the reverse osmosis membrane in the reverse osmosis device (120) is made of aromatic polyamide;

14) the reverse osmosis device (120) adopts an anti-pollution reverse osmosis membrane core;

15) the reverse osmosis membrane in the reverse osmosis device (120) adopts a roll type reverse osmosis membrane module or a DTRO butterfly tube type membrane module;

16) the ion exchange device (130) is a mixed anion-cation bed ion exchange device or a polished mixed bed ion exchange device;

17) the mixed bed ion exchange device (130) is composed of an anion exchange bed unit and a cation exchange bed unit which are connected in series;

18) the precision of a filter element of the filtering device (150) is 0.1-0.2 mu m;

19) the filtering device (150) is a folding filter element filtering device;

20) the system for treating and recycling the finished automobile part and/or raw material cleaning wastewater also comprises a sludge dewatering device, wherein the coagulation air floatation device (010), the coagulation sedimentation device (020) and the biochemical device (060) are communicated with the sludge dewatering device and are used for dewatering scum and sludge generated by the coagulation air floatation device, sludge generated by the coagulation sedimentation device and sludge generated by the biochemical device;

21) the system for treating and recycling the finished automobile part product and/or raw material cleaning wastewater further comprises a nutrient adding device which is used for adding a nutrient to the biochemical device (060).

3. The system for treating and recycling the washing wastewater of the finished products and/or the raw materials of the automobile parts according to claim 1, further comprising a non-oxidizing bactericide and reducing agent feeding device for feeding the non-oxidizing bactericide and the reducing agent into a pipeline communicating the activated carbon filter (110) and the reverse osmosis device (120).

4. The system for treating and recycling the washing wastewater of the finished products and/or the raw materials of the automobile parts according to claim 2, wherein in the characteristic 1), the air flotation unit (012) is a dissolved air flotation or a cavitation air flotation.

5. The system for treating and recycling the washing waste water of the finished products and/or the raw materials of the automobile parts according to claim 2, wherein in the characteristic 11), the material of the filtering membrane is selected from one of polysulfone, polyvinylidene fluoride, polyvinyl chloride and ceramic membrane.

6. The system for treating and recycling washing wastewater of finished products and/or raw materials of automobile parts according to claim 2, wherein in the characteristic 12), the cartridge precision of the cartridge filter is 0.1 μm to 100 μm.

7. The system for treating and recycling the washing waste water of the finished products and/or raw materials of the automobile parts according to claim 2, wherein in the characteristic 12), the cartridge filter or the bag filter is used as the cartridge filter.

8. The system for treating and recycling automobile part finished products and/or raw material cleaning wastewater according to claim 2, wherein in feature 8), the ozone advanced oxidation device comprises an ozone generating unit and an ozone reaction unit, the ozone reaction unit is disposed between the biochemical device (060) and the biological aerated filter (080), and the ozone generating unit is in fluid communication with the ozone reaction unit for delivering ozone to the ozone reaction unit.

9. The system for treating and recycling washing wastewater of automobile part finished products and/or raw materials according to claim 8, wherein the ozone reaction unit is a micro-nano bubble generator, a microporous aeration disc aeration reactor, a multi-point feeding plug flow type tubular reactor, an ejector dissolved air aeration reactor or a dissolved air pump circulation reactor.

10. The system for treating and recycling the washing wastewater of the finished products and/or the raw materials of the automobile parts according to claim 8, further comprising a hydrogen peroxide pipeline or an ultraviolet irradiation unit, wherein the hydrogen peroxide pipeline is communicated with the ozone reaction unit, and the ultraviolet irradiation unit is arranged in the ozone reaction unit or connected in series.

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