CN110902977A - Pre-treatment cleaning wastewater treatment system - Google Patents
Pre-treatment cleaning wastewater treatment system Download PDFInfo
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- CN110902977A CN110902977A CN201911350401.9A CN201911350401A CN110902977A CN 110902977 A CN110902977 A CN 110902977A CN 201911350401 A CN201911350401 A CN 201911350401A CN 110902977 A CN110902977 A CN 110902977A
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Images
Classifications
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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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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F11/00—Treatment of sludge; Devices therefor
- C02F11/12—Treatment of sludge; Devices therefor by de-watering, drying or thickening
- C02F11/121—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering
- C02F11/122—Treatment of sludge; Devices therefor by de-watering, drying or thickening by mechanical de-watering using filter presses
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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
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- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/281—Treatment of water, waste water, or sewage by sorption using inorganic sorbents
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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
- C02F1/28—Treatment of water, waste water, or sewage by sorption
- C02F1/283—Treatment of water, waste water, or sewage by sorption using coal, charred products, or inorganic mixtures containing them
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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
- C02F1/40—Devices for separating or removing fatty or oily substances or similar floating 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
- C02F1/00—Treatment of water, waste water, or sewage
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- C02F1/441—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by reverse osmosis
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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
- C02F1/44—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis
- C02F1/444—Treatment of water, waste water, or sewage by dialysis, osmosis or reverse osmosis by ultrafiltration or microfiltration
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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
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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
- C02F1/66—Treatment of water, waste water, or sewage by neutralisation; pH adjustment
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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
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- C—CHEMISTRY; METALLURGY
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C—CHEMISTRY; METALLURGY
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- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F3/00—Biological treatment of water, waste water, or sewage
- C02F3/34—Biological treatment of water, waste water, or sewage characterised by the microorganisms used
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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
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- Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- Water Supply & Treatment (AREA)
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- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
The invention relates to the technical field of wastewater treatment systems, in particular to a pretreatment cleaning wastewater treatment system, which solves the defects in the prior art and comprises a collecting tank, an aeration device, a filter press, a concentrated water waste liquid collecting tank, a sludge storage tank, a wastewater treatment all-in-one machine, a pretreatment water collecting tank and a triple-effect evaporation device, wherein the collecting tank is sequentially connected with the aeration device and the wastewater treatment all-in-one machine through pipelines, one side of the filter press is fixedly provided with a filter press return pipe through a flange plate, the other end of the filter press return pipe extends into the collecting tank, the filter press is connected with the sludge storage tank through a pipeline, the wastewater treatment system adopts physical and chemical precipitation treatment, and SS in the wastewater treatment system is separated from a solution main body in a precipitation form after oil is decomposed by using a sewage treatment integrated device in a matched manner of regulating the PH value by using a medicament, the treatment effect is greatly improved.
Description
Technical Field
The invention relates to the technical field of wastewater treatment systems, in particular to a pretreatment cleaning wastewater treatment system.
Background
In the production and processing process of products in factories, the surfaces of the products need to be subjected to surface pretreatment such as degreasing, silane coating, water washing and the like before coating so as to increase the adhesive force between the products and a paint film (or molding powder), thereby improving the surface corrosion resistance and appearance perception of the products. And a certain amount of pretreatment wastewater is generated and discharged in each process of the pretreatment of coating. At present, no complete system equipment for treating the wastewater reaching the discharge standard exists, the project needs to be under the requirements of an environment-friendly three-time management system according to relevant laws and regulations of environment protection, and the construction of corresponding matched environment-friendly treatment facilities is considered at the same time in the construction planning stage of the project. The standard reaching treatment is carried out on various kinds of sewage and wastewater generated after the official investment of enterprises in the future so as to reduce the discharge amount of pollutants generated by the enterprises.
Disclosure of Invention
The invention aims to solve the defects in the prior art and provides a pretreatment cleaning wastewater treatment system.
In order to achieve the purpose, the invention adopts the following technical scheme:
the pretreatment cleaning wastewater treatment system comprises a collecting tank, an aeration device, a filter press, a concentrated water and waste liquid collecting tank, a sludge storage tank, a wastewater treatment all-in-one machine, a pretreatment water collecting tank and a triple-effect evaporation device, wherein the collecting tank is connected with the aeration device and the wastewater treatment all-in-one machine sequentially through a pipeline, a filter press water return pipe is fixedly installed on one side of the filter press through a flange plate, and the other end of the filter press water return pipe extends into the collecting tank;
the filter press is connected with a sludge storage tank through a pipeline, the sludge storage tank is connected with a wastewater treatment all-in-one machine through a pipeline, the wastewater treatment all-in-one machine is connected with a pretreatment water collection tank through a pipeline, the pretreatment water collection tank is connected with a multi-media filter through a pipeline, the multi-media filter is connected with an activated carbon filter through a pipeline, the activated carbon filter is connected with a precision filter through a pipeline, the precision filter is connected with an ultrafiltration filter through a pipeline, the ultrafiltration filter is connected with a reverse osmosis device through a pipeline, and one side of the reverse osmosis device is fixedly provided with a drain pipe through a;
the concentrated water waste liquid collecting tank is connected with the triple-effect evaporation device through a pipeline, an evaporation cooling water pipe is fixedly connected with an outlet of the triple-effect evaporation device, and the other end of the evaporation cooling water pipe extends to the inside of the collecting tank.
Preferably, one side of waste water treatment all-in-one is equipped with the medicine bucket, and one side of medicine bucket is equipped with the cat ladder, and the quantity of medicine bucket sets up to four, and the inside of waste water treatment all-in-one has set gradually first reaction tank, second reaction tank, third reaction tank, fourth reaction tank and the sedimentation tank that is linked together.
Preferably, install raw water pump on the pipeline that preliminary treatment water collection tank and multi-media filter are connected, and the inside of preliminary treatment water collection tank is equipped with the collection water tank, install the high-pressure pump on the pipeline that ultrafiltration filter and reverse osmosis unit are connected, be equipped with the low pressure switch on the high-pressure pump.
Preferably, the pipeline connecting the filter press and the sludge storage tank is provided with two diaphragm pumps.
Preferably, the triple-effect evaporation device is provided with a steam inlet pipe.
Preferably, a sewage lifting pump is installed at the end part of the connecting pipeline of the collecting tank and the wastewater treatment all-in-one machine, and the sewage lifting pump is located in the collecting tank.
Preferably, the filter press is a plate-and-frame type dehydrator, and a pneumatic blow-down valve is arranged on a pipeline connecting the sludge storage tank and the wastewater treatment all-in-one machine.
Preferably, the inside of collection water tank from last to having first liquid level control valve, second liquid level control valve and third liquid level control valve of fixed mounting in proper order down, one side fixedly connected with inlet tube of collection water tank, install the motorised valve of intaking on the inlet tube, intake motorised valve and raw water pump all with first liquid level control valve, second liquid level control valve and third liquid level control valve electric connection.
Preferably, the triple-effect evaporation device comprises a first-effect evaporator, a second-effect evaporator and a triple-effect evaporator which are sequentially communicated, and a first-effect separation chamber, a second-effect separation chamber and a triple-effect separation chamber are respectively arranged in the first-effect evaporator, the second-effect evaporator and the triple-effect evaporator.
The invention has the beneficial effects that:
1. the wastewater treatment system adopts physical and chemical precipitation treatment, adopts integrated sewage treatment equipment, is matched with agents to adjust the pH value, is added with demulsifiers, coagulants and coagulant aids for treatment, and separates SS from a solution main body in a precipitation form after decomposing grease, thereby greatly improving the treatment effect.
2. In the invention, the pretreated water is subjected to rear-end quartz sand filtration, active carbon filtration, UF ultrafiltration system and RO membrane reverse osmosis system treatment and then is recycled in a production cleaning section or discharged after reaching the standard; in the treatment process, the back washing water recovery and collection tank of the equipment is treated again; sludge generated in the treatment process is dehydrated through a plate-and-frame filter press and then treated as solid waste.
3. In the production process, concentrated water waste liquid obtained after degreasing and regular groove replacement of silane involucra liquid is collected by a waste liquid collecting tank, treated by a triple-effect evaporator and then treated by saturated crystalline slag, and treated again by an evaporative cooling water recovery collecting tank for recycling or standard emission, so that the purposes of energy conservation and emission reduction are achieved.
Drawings
FIG. 1 is a schematic view of a pretreatment cleaning wastewater treatment system according to the present invention;
FIG. 2 is a schematic structural diagram of concentrated water for degreasing silane exchange tank production according to the present invention;
FIG. 3 is a schematic structural diagram of an integrated wastewater treatment machine according to the present invention;
FIG. 4 is a schematic structural view of a filter press according to the present invention;
FIG. 5 is a schematic structural view of a high pressure pump according to the present invention;
FIG. 6 is a flow chart of a pretreatment cleaning wastewater treatment system according to the present invention;
FIG. 7 is a schematic diagram of the permeation of a pretreatment cleaning wastewater treatment system according to the present invention;
FIG. 8 is a reverse osmosis schematic diagram of a pretreatment cleaning wastewater treatment system according to the present invention.
In the figure: 1 collecting water tank, 2 aerating device, 3 filter press, 31 filter press recycling pipe, 4 concentrated water waste liquid collecting tank, 5 sludge storage tank, 6 wastewater treatment integrated machine, 61 dosing barrel, 62 ladder stand, 7 pretreatment water collecting tank, 8 raw water pump, 9 sand filter, 10 carbon filter, 11 precision filter, 12 ultrafiltration device, 13 high pressure pump, 131 low pressure switch, 14 reverse osmosis device, 15 drain pipe, 16 diaphragm pump, 17 triple effect evaporation device, 18 steam inlet pipe, 19 evaporation cooling water pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1-6, the pretreatment cleaning wastewater treatment system comprises a collecting tank 1, an aeration device 2, a filter press 3, a concentrated water waste liquid collecting tank 4, a sludge storage tank 5, a wastewater treatment integrated machine 6, a pretreatment water collecting tank 7 and a triple effect evaporation device 17, wherein the collecting tank 1 is connected with the aeration device 2 and the wastewater treatment integrated machine 6 sequentially through pipelines, a filter press water return pipe 31 is fixedly installed on one side of the filter press 3 through a flange plate, and the other end of the filter press water return pipe 31 extends into the collecting tank 1; the filter press 3 is connected with a sludge storage tank 5 through a pipeline, the sludge storage tank 5 is connected with a wastewater treatment all-in-one machine 6 through a pipeline, the wastewater treatment all-in-one machine 6 is connected with a pretreatment water collection tank 7 through a pipeline, the pretreatment water collection tank 7 is connected with a multi-media filter 9 through a pipeline, the multi-media filter 9 is connected with an active carbon filter 10 through a pipeline, the active carbon filter 10 is connected with a precision filter 11 through a pipeline, the precision filter 11 is connected with an ultrafiltration filter 12 through a pipeline, the ultrafiltration filter 12 is connected with a reverse osmosis device 14 through a pipeline, and one side of the reverse osmosis device 14 is fixedly provided with a; the concentrated water waste liquid collecting tank 4 is connected with a triple-effect evaporation device 17 through a pipeline, an evaporation cooling water pipe 19 is fixedly connected with an outlet of the triple-effect evaporation device 17, the other end of the evaporation cooling water pipe 19 extends into the collecting tank 1, a wastewater treatment system is designed to adopt physical and chemical precipitation treatment, through sewage treatment integrated equipment, a medicament is cooperatively used for adjusting the pH value, a demulsifier, a coagulant and a coagulant aid are added for treatment, SS in the wastewater is separated from a solution main body in a precipitation form after grease is decomposed, the treatment effect is greatly improved, and pretreated water is recycled to a production cleaning section for recycling or is discharged up to the standard after being treated by a rear-end quartz sand filtration, activated carbon filtration, a UF ultrafiltration system and an RO membrane reverse osmosis system; in the treatment process, the back washing water recovery and collection tank of the equipment is treated again; sludge generated in the treatment process is dehydrated through a plate-and-frame filter press and then treated as solid waste for external treatment, concentrated water waste liquid obtained after degreasing and silane involucra liquid are periodically subjected to tank replacement in the production process is collected by a waste liquid collecting tank, treated by a triple effect evaporation device 17 and then treated by saturated crystalline slag for external treatment, and evaporated cooling water is recycled by a water collecting tank 1 for secondary treatment or discharged after reaching the standard, so that the purposes of energy conservation and emission reduction are achieved;
wherein, one side of the wastewater treatment integrated machine 6 is provided with a dosing barrel 61, one side of the dosing barrel 61 is provided with a ladder 62, the number of the dosing barrels 61 is four, the wastewater treatment integrated machine 6 is internally provided with a first reaction tank, a second reaction tank, a third reaction tank, a fourth reaction tank and a sedimentation tank which are communicated in sequence, a raw water pump 8 is arranged on a pipeline connecting the pretreatment water collection tank 7 and the multi-medium filter 9, a water collection tank is arranged inside the pretreatment water collection tank 7, a high-pressure pump 13 is arranged on a pipeline connecting the ultrafiltration filter 12 and the reverse osmosis device 14, a low-pressure switch 131 is arranged on the high-pressure pump 13, a diaphragm pump 16 is arranged on a pipeline connecting the filter press 3 and the sludge storage tank 5, the number of the diaphragm pumps 16 is two, a steam inlet pipe 18 is arranged on the triple-effect evaporation device 17, and a sewage lifting pump is arranged on the end part of the pipeline connecting the water collection, the sewage lifting pump is positioned in the collecting pool 1, the filter press 3 is a plate-and-frame type dehydrator, a pneumatic blow-down valve is arranged on a pipeline connected with the sludge storage tank 5 and the wastewater treatment all-in-one machine 6, a first liquid level control valve, a second liquid level control valve and a third liquid level control valve are sequentially and fixedly mounted in the collecting tank from top to bottom, a water inlet pipe is fixedly connected to one side of the collecting tank, a water inlet electric valve is mounted on the water inlet pipe, the water inlet electric valve and the raw water pump 8 are electrically connected with the first liquid level control valve, the second liquid level control valve and the third liquid level control valve, the triple-effect evaporation device 17 comprises a single-effect evaporator, a double-effect evaporator and a triple-effect evaporator which are sequentially communicated, and a single-effect separation chamber, a double-effect separation chamber and a triple-effect separation chamber are respectively arranged in the single-effect evaporator.
①, adding an aeration device 2 in a collecting tank 1, forcibly adding air into the sewage to ensure that the sewage in the tank is contacted with the air for oxygenation, stirring the liquid, accelerating the transfer of oxygen in the air into the liquid, preventing suspension in the tank from sinking, and carrying out oxidative decomposition on organic matters in the sewage, wherein the aeration principle is that air oxidizes the water in the aeration treatment process, and the generated reaction is that Fe2+ + O2+ H2O-FeO (OH) + O2+ H2O-Fe (OH)3 separates the organic matters in the water in the tank from the oxidative decomposition of the air, and the organic matters in the water and the air are introduced into the integrated wastewater treatment machine through a sewage lifting pump additionally arranged in the collecting tank 1;
② the sewage collected in the water tank 1 is pumped to the wastewater treatment integrated machine 6, the wastewater treatment integrated machine 6 is filled with drugs by a drug adding barrel 61 which is used correspondingly, a ladder 62 is used for facilitating the operation of personnel, and a PH regulator is added through a first reaction tank of the equipment to adjust the PH value;
wherein, the PH regulation action principle: in the process, when the integrated machine is used for treatment, a pH regulator is added into the inlet water to regulate the pH value, and the pH value is used for neutralizing the water quality and providing effective reaction conditions for the rear-end coagulation-assistant reaction; the action principle of the demulsifier is as follows: the method can effectively make the interfacial tension of water-in-oil (W/O) or oil-in-water (O/W) emulsion to make the oil or colloid particles in the sewage lose stable repulsion force and attraction force, and finally lose stability to form flocs, and further complete the oil-water separation and the separation of harmful impurities in the sewage through chemical bridging, so that the sewage is purified, the oil-in-water wastewater is effectively broken, the oil-water separation time is shortened, the oil-water separation emulsion can be mixed with water, and the method is effective in a wider pH value range; the coagulation principle is as follows: adding a coagulant for stirring reaction, wherein the coagulant is a water-soluble inorganic high-molecular polymer, has high electrical neutralization and bridging effects on colloids and particles in water, can strongly remove toxic substances and heavy metal ions, has strong bridging adsorption performance, and can effectively remove heavy metal ions such as chromaticness SS, COD, BOD, arsenic, mercury and the like in water along with physical and chemical processes such as coagulation, adsorption, precipitation and the like in the hydrolysis process; the principle of coagulation aid and precipitation separation action: because the properties of the coagulation treatment process are stable and can not be removed by natural sedimentation, a coagulant aid is added to enable colloidal particles which are difficult to precipitate in water to be de-coagulated and aggregated, the colloidal particles are flocculated into larger particles to precipitate, molecules of the coagulant aid can be bridged and adsorbed with suspended particles dispersed in a solution, the flocculated particles enter a separator at the rear end of the integrated machine to be naturally settled so as to enable pollutants and other substances to be separated and settled together, the separated substances are converted into sludge to enter a sludge storage tank 5 to be subjected to filter pressing and dehydration, and the separated supernatant water serving as pretreatment water enters a pretreatment water collection tank 7 to be subjected to next continuous treatment;
③ the sludge in the sedimentation tank of the integrated wastewater treatment machine 6 is automatically controlled in a timing way by a pneumatic valve and is discharged into the sludge storage tank 5;
④ the sludge in the sludge storage tank 5 is pumped to a plate and frame type dehydrator, namely a filter press 3 by a pneumatic diaphragm pump 15, and the dehydrated sludge cake is treated as solid waste;
⑤ since the pre-treatment water pressure overflow has no water pressure, which will cause unstable flow velocity and affect the filtering effect, at the same time, in order to avoid impact on the pre-treatment device, a water collecting tank is needed, the water collecting tank is a water collecting tank after cleaning pre-treatment, the water collecting tank is used for buffering and balancing water pressure, a set of first, second and third liquid level control valves with high and low three-point liquid level signal output is provided, when the liquid level of the water tank reaches the high water level, a signal is sent to inform the water inlet electric valve to close, to prevent water overflow, when the liquid level reaches the middle liquid level, the water inlet electric valve is automatically opened to supplement water, when the liquid level of the water tank reaches the low water level, a signal is sent to inform the raw water pump 8 to stop working, to prevent the raw water pump 8 from running idle due to water shortage, when the water is replenished;
⑥ pumping water from the collecting water tank to raise the raw water supply pressure and meet the pressure and flow required by the normal operation of the subsequent treatment equipment, the raw water pump 8 is controlled by the liquid level linkage on the collecting water tank, when the collecting water tank is at low water level, the raw water pump 8 stops conveying, avoiding the raw water pump 8 from being damaged due to the working under the water-free state;
⑦ the multi-media filter 9 is designed 1, the installation position is before the water enters the active carbon filter 10, the material of the filter tank is glass fiber reinforced plastic, the filter is filled with the materials of cushion pebbles, quartz sand, anthracite, etc., when the water flows through the filter layer from the top, the partial solid suspended substance, colloid, etc. in the water enters the tiny holes formed by the upper filter material, and is intercepted by the surface layer of the filter material under the action of adsorption and mechanical retention, at the same time, the intercepted suspended substance is overlapped and bridged as if a film is formed on the surface of the filter layer, the suspended substance in the water is continuously filtered, which is the film filtration of the so-called surface layer, the filtration action not only has the surface of the filter layer, but also has the interception action when the water enters the middle filter layer, which is called the osmosis filtration action, in addition, because the filter materials are closely arranged, when the suspended substance particles in the water flow through the curved pore channels in the filter layer, more machines collide with and contact with the surface of the filter material, the fine particle impurities in the water are intercepted, thereby, the water can be further purified and provide the conditions for the subsequent purification,
furthermore, the pressure difference between the front and the back of the filter will rise rapidly along with the time until the filter fails, at the moment, the filter material needs to be backwashed by reverse water flow, so that the filler in the filter is suspended and loosened, the intercepted substances adhered to the surface of the filler are stripped and taken away by the water flow, the filtering function is recovered, the filter is provided with an automatic controller, and the conversion of the running, backwashing and forward washing functions of the filter is automatically realized through program setting;
⑧ the activated carbon filter 10 is designed 1, the installation position is before the water inlet of the precise filter 11, after the water outlet of the multi-medium filter 9, the material of the filter tank body is made of glass fiber reinforced plastic, the activated carbon filter 10 uses the adsorption characteristic of the activated carbon to adsorb the organic pollutant, microorganism and dissolved oxygen in the water on the surface of the carbon, increases the probability of the microorganism degrading the organic pollutant, prolongs the retention time of the organic matter, strengthens the biodegradation, removes the organic matter adsorbed on the surface of the carbon, also can remove the peculiar smell and color in the water, removes the heavy metal, the synthetic detergent and dechlorination, in addition, the selective adsorption of the activated carbon can not only adsorb the electrolyte ion, but also can well control and reduce the potassium permanganate oxygen Consumption (COD), the equipment has the comprehensive functions of adsorption, biodegradation and filtration treatment, not only can ensure the stable treatment effect, but also has high efficiency, impact resistance, small occupation, simple and easy operation management and low operation cost, etc. in addition, the activated carbon filter can effectively prevent the organic matter pollution on the reverse osmosis surface without being influenced by the self temperature, pH value and the organic mixture of the water inlet;
the pressure difference between the front and the back of the filter will rise rapidly along with the time until the filter fails, at the moment, the filter material needs to be backwashed by reverse water flow, so that the filler in the filter is suspended and loosened, and consequently, the intercepted substances adhered to the surface of the filler are stripped and taken away by the water flow, and the filtering function is recovered. The filter is provided with an automatic controller, and the running, backwashing and forward washing functions of the filter are automatically switched through program setting;
⑨ the ultrafiltration filter 12 is designed 1, the installation position is before the water inlet of the reverse osmosis device 14, after the water outlet of the precise filter 11, the ultrafiltration device is composed of the ultrafiltration membrane and the components thereof, the ultrafiltration membrane is a semipermeable membrane, adopts modified polyvinyl chloride (PVC) material, the separation precision is between the microfiltration and the nanofiltration, and the separation is realized by the sieving principle, which is suitable for the separation, concentration and purification process of the macromolecule substance and the micromolecule substance;
⑩ precision filter 11 is installed in front of the water inlet end of the ultrafiltration filter 12, which aims to filter the particles and impurities which are more than 5 μm and are possibly brought by the pretreatment process, after the pretreatment process, the particles may break through the reverse osmosis membrane module after passing through the high pressure pump 13 of the Reverse Osmosis (RO) main machine, thereby causing a large amount of salt leakage and water leakage, affecting the water quality of the outlet water, and possibly scratching the impeller of the high pressure pump 13, the structure of the filter meets the requirement of quickly changing the filter element, the top of the filter is provided with a vent valve, the surface filtering speed of the filter element is not more than 10m3/m 2.h (based on the surface area of the filter element), the working pressure of the precision filter 11 is 0.2MPa-0.5MPa, after a period of operation, the surface of the filter element is blocked by the particles and impurities in the water, the pressure difference between the inlet and the outlet of the filter is increased, when the pressure difference is more than the set value (usually 0.05-0.;
further, the reverse osmosis device 14 mainly comprises a high-pressure pump 13, a reverse osmosis membrane and a control part, wherein the high-pressure pump 13 pressurizes inlet water, water molecules except the water molecules can permeate the RO membrane, other substances (mineral substances, organic substances, microorganisms and the like) in the water are almost rejected by the membrane and cannot permeate the RO membrane to be washed away by high-pressure concentrated water, the reverse osmosis membrane filtration process can thoroughly remove TOC, SiO2, micro-particles and bacteria which are difficult to remove in the past pure water manufacturing process by utilizing the high desalination performance of the RO membrane, and meanwhile, the acid-base consumption of ion exchange regeneration is thoroughly saved, the acid-base pollution discharge is avoided, and the secondary pollution of the bacteria and the organic substances in an ion exchange layer is avoided. The water after reverse osmosis treatment can remove more than 99% of soluble solids, more than 99% of organic matters and colloid, and almost 100% of bacteria, and the reverse osmosis device 14 is equipped with enough on-line instruments and chemical instruments capable of visually reflecting the running state of the device, and the instrument comprises: a pressure gauge, a flowmeter, conductivity and the like are arranged, a local control panel is arranged for field operation and control, a reverse osmosis membrane element is a polyamide composite membrane produced by VONTRON company, and the desalination rate of a single membrane element is more than 99 percent; the reverse osmosis membrane pressure vessel is made of SS304 stainless steel material;
Triple effect evaporator apparatus: the tank-changing water for producing the cleaning liquid medicine is treated by a triple-effect evaporator to concentrate the wastewater, so that the concentration of the wastewater is increased, the whole wastewater amount is reduced, distilled water generated by evaporation is recycled, and high-concentration wastewater and waste residues are subjected to external treatment. The whole project takes the reduction of wastewater quantity and the control of equipment and operation cost as the core, and the material to be treated is degreasing/silane film tank replacement liquid or reverse osmosis washing water; the equipment is operated continuously, the steam generated by natural gas is used as a heat source or other heat sources, the energy consumption ratio of the triple-effect crystallization evaporator is 1:0.4, namely 100X0.4 is 40kg of steam for treating 100L of water, the existing mainstream crystallization evaporation equipment adopts the triple-effect crystallization evaporator for saving energy consumption, the energy consumption is low, and the equipment process is mature;
the material flow is as follows: the solution is conveyed to a condensate water preheater by a feeding pump for preheating, then enters a first-effect evaporator for evaporation, after vapor-liquid separation is carried out in a first-effect separation chamber, feed liquid is conveyed to a second-effect evaporator for evaporation by a first-effect discharging pump, after vapor-liquid separation is carried out in a second-effect separation chamber, the feed liquid is conveyed to a third-effect evaporator for evaporation by a second-effect discharging pump, after vapor-liquid separation is carried out in a third-effect separation chamber, the feed liquid is evaporated to a certain concentration and then is directly discharged by a discharging pump.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. The pretreatment cleaning wastewater treatment system comprises a collecting tank (1), an aeration device (2), a filter press (3), a concentrated water and waste liquid collecting tank (4), a sludge storage tank (5), a wastewater treatment integrated machine (6), a pretreatment water collecting tank (7) and a triple-effect evaporation device (17), and is characterized in that the collecting tank (1) is connected with the aeration device (2) and the wastewater treatment integrated machine (6) sequentially through a pipeline, a filter press water return pipe (31) is fixedly installed on one side of the filter press (3) through a flange plate, and the other end of the filter press water return pipe (31) extends into the collecting tank (1);
the filter press (3) is connected with a sludge storage tank (5) through a pipeline, the sludge storage tank (5) is connected with a wastewater treatment all-in-one machine (6) through a pipeline, the wastewater treatment all-in-one machine (6) is connected with a pretreatment water collection tank (7) through a pipeline, the pretreatment water collection tank (7) is connected with a multi-media filter (9) through a pipeline, the multi-media filter (9) is connected with an activated carbon filter (10) through a pipeline, the activated carbon filter (10) is connected with a precision filter (11) through a pipeline, the precision filter (11) is connected with an ultrafiltration filter (12) through a pipeline, the ultrafiltration filter (12) is connected with a reverse osmosis device (14) through a pipeline, and one side of the reverse osmosis device (14) is fixedly provided with a drain pipe;
concentrated water waste liquid collecting pit (4) pass through the pipeline with triple effect evaporation device (17) are connected, and triple effect evaporation device's (17) export fixedly connected with evaporation cooling water pipe (19), the other end of evaporation cooling water pipe (19) extends to the inside of collecting pit (1).
2. The pretreatment cleaning wastewater treatment system according to claim 1, wherein a dosing barrel (61) is arranged on one side of the wastewater treatment all-in-one machine (6), a ladder (62) is arranged on one side of the dosing barrel (61), the number of the dosing barrels (61) is four, and a first reaction tank, a second reaction tank, a third reaction tank, a fourth reaction tank and a sedimentation tank which are communicated with each other are sequentially arranged in the wastewater treatment all-in-one machine (6).
3. The pretreatment cleaning wastewater treatment system according to claim 1, wherein a raw water pump (8) is installed on a pipeline connecting the pretreatment water collection tank (7) and the multi-media filter (9), a collection water tank is assembled inside the pretreatment water collection tank (7), a high-pressure pump (13) is installed on a pipeline connecting the ultrafiltration filter (12) and the reverse osmosis device (14), and a low-pressure switch (131) is provided on the high-pressure pump (13).
4. The pretreatment cleaning wastewater treatment system according to claim 1, wherein two diaphragm pumps (16) are installed in a pipe connecting the filter press (3) and the sludge storage tank (5), and the number of the diaphragm pumps (16) is set to two.
5. The pretreatment cleaning wastewater treatment system according to claim 1, wherein a steam inlet pipe (18) is provided on the triple-effect evaporation device (17).
6. The pretreatment cleaning wastewater treatment system according to claim 1, wherein a wastewater lift pump is installed at an end of a pipeline connecting the collection tank (1) and the wastewater treatment integrated machine (6), and the wastewater lift pump is located in the collection tank (1).
7. The pretreatment cleaning wastewater treatment system according to claim 1, wherein the filter press (3) is a plate-and-frame dehydrator, and a pneumatic blow-down valve is provided on a pipe connecting the sludge storage tank (5) and the wastewater treatment integrated machine (6).
8. The pretreatment cleaning wastewater treatment system according to claim 3, wherein a first liquid level control valve, a second liquid level control valve and a third liquid level control valve are fixedly installed in the collection tank from top to bottom in sequence, a water inlet pipe is fixedly connected to one side of the collection tank, a water inlet electric valve is installed on the water inlet pipe, and the water inlet electric valve and the raw water pump (8) are electrically connected with the first liquid level control valve, the second liquid level control valve and the third liquid level control valve.
9. The pretreatment cleaning wastewater treatment system according to claim 1, wherein the triple-effect evaporation device (17) comprises a first-effect evaporator, a second-effect evaporator and a triple-effect evaporator which are sequentially communicated, and a first-effect separation chamber, a second-effect separation chamber and a triple-effect separation chamber are respectively arranged in the first-effect evaporator, the second-effect evaporator and the triple-effect evaporator.
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