CN110746003A - Convenient integrated paint spraying wastewater treatment and recycling system and method - Google Patents
Convenient integrated paint spraying wastewater treatment and recycling system and method Download PDFInfo
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- CN110746003A CN110746003A CN201911183563.8A CN201911183563A CN110746003A CN 110746003 A CN110746003 A CN 110746003A CN 201911183563 A CN201911183563 A CN 201911183563A CN 110746003 A CN110746003 A CN 110746003A
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- wastewater treatment
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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
- C02F1/52—Treatment of water, waste water, or sewage by flocculation or precipitation of suspended impurities
- C02F1/5281—Installations for water purification using chemical agents
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/66—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
- C02F1/00—Treatment of water, waste water, or sewage
- C02F2001/007—Processes including a sedimentation step
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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
- C02F2103/00—Nature of the water, waste water, sewage or sludge to be treated
- C02F2103/14—Paint wastes
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Separation Of Suspended Particles By Flocculating Agents (AREA)
Abstract
The application discloses convenient integrated paint spraying wastewater treatment and recycling system and method, sewage is treated sequentially through the following equipment: a wastewater collection and regulation tank for storing sewage and stabilizing water quality; the neutralization and coagulation sedimentation device is connected with a dosing device, and the sediment is dehydrated and dried by a plate-and-frame filter press; the buffer tank is used for storing the supernatant liquid treated by the neutralization and coagulation sedimentation device; and (4) filtering the supernatant by a mechanical filter, and storing the supernatant in a clean water tank. The invention can meet the standard of the recycled water in the production link of enterprises.
Description
Technical Field
The application relates to sewage treatment, in particular to a convenient and fast integrated paint spraying wastewater treatment and recycling system and method.
Background
The paint spraying wastewater has high concentration of organic pollutants in the wastewater due to dissolution or suspension of a large amount of paint mist, the wastewater is weakly acidic, and the pH change range is generally 5.0-7.0; the COD is determined by the use and replacement period of the spray paint water curtain circulating water and the waste gas spray circulating water, the longer the period is, the higher the concentration is, the normal concentration is 2000 mg/, the higher the concentration can reach 10000 mg/, the change range of SS is generally 600-plus-1000 mg/L, the chroma is generally about 70, and the high-concentration circulating water adopts the traditional biochemical process and is difficult to reach the standard of a connecting pipe or a water quality standard of sewage drainage town sewers due to unstable operation.
The prior treatment technology has the following defects: 1. the wastewater (spray booth water curtain circulating water + waste gas spray tower circulating water) generated by the spray booth of the enterprise has high pollutant concentration and great treatment difficulty, and the conventional treatment process is complex, has high treatment cost and great difficulty in reaching the standard and discharging; 2. the drainage has the characteristics of intermittence and non-periodicity, and the physicochemical and biochemical combined process is adopted, so that the biochemical effect is unstable, and the treatment efficiency is low; 3. A large amount of structures need to be built for biochemistry, the occupied area is large, and the investment of civil engineering is large; 4. the biochemical system is unstable in water outlet when microorganisms are abnormal due to lack of nutrition, a membrane filtration process is generally used for standard discharge, and when the pretreatment efficiency is low, the membrane fouling is serious, the membrane consumption is high, and the operation cost is high; 5. the traditional flocculating agent has large adding amount, large sludge production amount in the process and large cost for dangerous waste treatment because the waste residues contain paint residues; 6. the spray tower circulating water used for the paint spraying waste gas treatment causes secondary pollution of spray water of the waste gas treatment due to low treatment efficiency.
Disclosure of Invention
The invention aims to provide a convenient and fast integrated paint spraying wastewater treatment and recycling system and method to meet the recycling water standard of an enterprise production link.
In order to achieve the above object, the present invention provides the following technical solutions.
The embodiment of the application discloses convenient integrated form effluent disposal and recycling system that sprays paint, sewage loops through following equipment and handles:
a wastewater collection and regulation tank for storing sewage and stabilizing water quality;
the neutralization and coagulation sedimentation device is connected with a dosing device, and the sediment is dehydrated and dried by a plate-and-frame filter press;
the buffer tank is used for storing the supernatant liquid treated by the neutralization and coagulation sedimentation device;
and (4) filtering the supernatant by a mechanical filter, and storing the supernatant in a clean water tank.
Preferably, in the above convenient and fast integrated paint spraying wastewater treatment and recycling system, the liquid in the clean water tank is adopted when the mechanical filter is cleaned.
Preferably, in the above convenient integrated paint spraying wastewater treatment and recycling system, the clear solution after filter pressing of the plate-and-frame filter press flows back to the wastewater collection and regulation tank.
Preferably, in the above convenient integrated paint spraying wastewater treatment and recycling system, the dosing device comprises an alkali dosing and flocculating agent.
Correspondingly, a portable garbage transfer station sewage treatment and recycling method is also disclosed, and the system is adopted for treatment.
Preferably, in the above method for treating and recycling sewage of the portable garbage transfer station, the wastewater collection and adjustment tank outputs balanced water amount and stable water quality.
Preferably, in the above-mentioned portable garbage transfer station sewage treatment and recycling method, the neutralization and coagulation device is used for adding a neutralizing agent, a special flocculant for paint mist and a coagulant into the coagulation sedimentation tank, increasing the ion concentration, reducing the thickness of the diffusion layer, rapidly condensing colloidal particles, and through the action of adsorption and electric neutralization, the colloidal particles are easy to approach other particles and mutually adsorb to form large floccules, and after the floccules are formed, the solid-liquid separation is carried out in a sedimentation zone, the solids are settled by gravity, the supernatant enters the buffer tank after sedimentation, and the sediment sludge is dewatered and dried by a plate and frame filter press to treat dangerous waste.
Compared with the prior art, the invention has the advantages that 1, the treatment process is simple, the treatment cost is low, and the zero discharge of sewage is realized; 2. the physical method is adopted, the effect is stable, and the water quality of the circulating reuse can be completely achieved; 3. The required structures are few, the occupied area is small, and the civil engineering investment is low; 4. the agent is a special paint mist flocculating agent, replaces the traditional agent, and has small dosage, high removal efficiency and low agent cost; 5. the sludge yield is small, and the cost for hazardous waste treatment is low; 6. the cleanness of the spray water curtain water and the spray water of the waste gas treatment spray tower is kept, and the treatment efficiency of a spray waste gas system is improved.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic flow chart of a sewage treatment and recycling method for a portable garbage transfer station according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in detail 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 embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, a convenient integrated paint spraying wastewater treatment and recycling system adopts a process of dosing, physicochemical separation and filtration recycling to meet the recycling water standard in the production links of enterprises, and each link is described as follows:
1. wastewater collection and regulation pool
All the sewage entering the sewage treatment system may have a change in water quantity and water quality, which is very disadvantageous to the normal operation and treatment efficiency of the sewage treatment structure. The larger the fluctuation of water quantity and water quality, the more unstable the treatment effect is, and even the sewage treatment process is seriously damaged. In order to reduce the influence of water quantity and water quality change on the sewage treatment process, a regulating tank is arranged in front of a sewage treatment system to equalize water quality and make up for defects, so that subsequent treatment structures can obtain balanced water inflow and stable water quality during the operation period, and an ideal treatment effect is achieved.
2. Neutralizing and coagulating sedimentation device
The process includes three steps of neutralization by adding alkali, coagulation (flocculation) and precipitation.
By adding neutralizing agent, flocculant special for paint mist and coagulant (electrolyte) into the waste water, the ion concentration in the solution is increased, and the thickness of the diffusion layer is reduced. When two colloidal particles approach each other, the zeta potential decreases due to the decrease in the thickness of the diffusion layer, so that their mutual repulsive force decreases and the colloidal particles are rapidly aggregated. Through the action of adsorption and electric neutralization, colloidal particles are easy to approach other particles and mutually adsorb, and are condensed into large floccules. And after the flocculating constituent is formed, performing solid-liquid separation in a settling zone, settling the solid by gravity, adding an anti-blocking filler in the settling zone, accelerating mud-water separation by utilizing a shallow layer settling principle, overflowing the settled supernatant into a buffer tank for temporary storage, and further concentrating the settled sludge in a sludge collecting zone.
3. Sludge drying device
Because the sludge discharge is operated intermittently, the sludge-water separation can meet the sludge drying effect by adopting an intermittently operated plate-and-frame filter press. Concentrated sludge is subjected to dehydration and drying in a filter press through pump pressurization and then treated as hazardous waste, and qualified units are entrusted to treat the sludge, so that the hazardous waste treatment amount of enterprises is greatly reduced, and the treatment cost is saved.
4. Mechanical filtration and reuse
The filter mainly aims to remove suspended matters, colloids and partial organic matters in water, the filter adopts two filter materials (the upper layer is anthracite and the lower layer is natural quartz sand) with different specific gravities, the suspended matters in the water are intercepted by utilizing a deep filtration principle, the filter is designed to have a filtration speed of 8-10 m/h, and when the filter operates to a certain stage and the pressure difference between an inlet and an outlet reaches a certain value (generally 0.08-0.1 Mpa), backwashing must be carried out. The filter is back flushed by self-produced water, so that the use amount of tap water is reduced, and the washing strength is 12-14 l/m2S, pressure not less than 0.2 MPa.
5. Medicine adding device
The dosing equipment can be used for dosing alkali, a special flocculant for paint mist, a flocculant (PAC), a coagulant aid (PAM) and other medicaments in the sewage treatment system. The dosing device has the characteristics of compact structure, complete preparation, rapid installation, simple operation and convenient maintenance.
The device can be used for preparing solution and quantitatively and regularly adding medicament.
It is composed of the following parts:
(1) a stirrer and a stirring drum;
(2) adding a liquid medicine metering pump;
(3) y-type filter, safety valve, pipeline system;
the working principle of the device is as follows: certain medicament is put into the stirring solution box according to the requirement for stirring, after the dissolution is finished, the control system controls the metering pump to deliver the medicament to the working process of a medicament adding point, and the size of the medicament adding amount can be freely adjusted to meet the requirements of different medicament adding places.
And further, a plate and frame filter press presses the filtered clear liquid to flow back to the wastewater collection and adjustment tank.
In this technical scheme, the clear liquid is comparatively dirty this moment, needs retreatment.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing is directed to embodiments of the present application and it is noted that numerous modifications and adaptations may be made by those skilled in the art without departing from the principles of the present application and are intended to be within the scope of the present application.
Claims (7)
1. The utility model provides a convenient integrated form waste water treatment and recycling system that sprays paint which characterized in that, sewage loops through following equipment and handles:
a wastewater collection and regulation tank for storing sewage and stabilizing water quality;
the neutralization and coagulation sedimentation device is connected with a dosing device, and the sediment is dehydrated and dried by a plate-and-frame filter press;
the buffer tank is used for storing the supernatant liquid treated by the neutralization and coagulation sedimentation device;
and (4) filtering the supernatant by a mechanical filter, and storing the supernatant in a clean water tank.
2. The portable integrated paint spraying wastewater treatment and recycling system according to claim 1, wherein the mechanical filter is cleaned by using liquid in the clean water tank.
3. The convenient and fast integrated paint spraying wastewater treatment and recycling system according to claim 1, wherein the clear filter liquor of the plate and frame filter press is refluxed to the wastewater collection and adjustment tank.
4. The convenient integrated painting wastewater treatment and recycling system according to claim 1, wherein said dosing device comprises an alkali dosing and flocculating agent.
5. A convenient and fast integrated paint spraying wastewater treatment and recycling method, which is characterized in that the convenient and fast integrated paint spraying wastewater treatment and recycling system of claim 1 is adopted for treatment.
6. The convenient and fast integrated paint spraying wastewater treatment and recycling method according to claim 5, wherein the wastewater collection regulating tank outputs balanced water quantity and stable water quality.
7. The convenient and fast integrated paint spraying wastewater treatment and recycling method according to claim 5, wherein the neutralization and coagulation sedimentation device is characterized in that a neutralization agent, a special flocculant for paint mist and a coagulant are added into a coagulation sedimentation tank, the ionic concentration is increased, the thickness of a diffusion layer is reduced, colloidal particles are rapidly coagulated, the colloidal particles are easily close to other particles and mutually adsorbed by the action of adsorption and electric neutralization, the colloidal particles are coagulated into large floccules, solid-liquid separation is carried out in a sedimentation zone after the floccules are formed, solids are settled by gravity, supernatant liquid after sedimentation enters the buffer tank, and the settled sludge is dewatered and dried to treat dangerous waste through a plate-and-frame filter press.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911183563.8A CN110746003A (en) | 2019-11-27 | 2019-11-27 | Convenient integrated paint spraying wastewater treatment and recycling system and method |
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| CN201911183563.8A CN110746003A (en) | 2019-11-27 | 2019-11-27 | Convenient integrated paint spraying wastewater treatment and recycling system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111760718A (en) * | 2020-05-09 | 2020-10-13 | 四川省宜宾环球集团有限公司 | Paint spraying process waste gas treatment system |
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Cited By (1)
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| CN111760718A (en) * | 2020-05-09 | 2020-10-13 | 四川省宜宾环球集团有限公司 | Paint spraying process waste gas treatment system |
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