CN214360797U

CN214360797U - High COD dyeing wastewater integrated processing system of high salt

Info

Publication number: CN214360797U
Application number: CN202022800010.7U
Authority: CN
Inventors: 宋仁贵; 王蓉
Original assignee: Changzhou Shisheng Environmental Engineering Technology Co ltd
Current assignee: Changzhou Shisheng Environmental Engineering Technology Co ltd
Priority date: 2020-11-28
Filing date: 2020-11-28
Publication date: 2021-10-08
Anticipated expiration: 2030-11-28

Abstract

The utility model discloses a high COD dyeing wastewater integrated processing system of high salt relates to waste water treatment technical field, this high COD dyeing wastewater integrated processing system of high salt includes, waste water is through the waste water collecting pit, through the super magnetism flocculation and precipitation device sedimentation separation most suspended solid, get rid of the particle diameter through ceramic membrane filter equipment and go up the suspended solid at 100nm again, pass through the decoloration of electrocatalysis oxidation unit again, go into the evaporation crystallization device evaporation behind the degradation COD and separate out inorganic salt and carry out resource utilization, the evaporation condensate recycles, realize the integrated processing purpose of waste water.

Description

High COD dyeing wastewater integrated processing system of high salt

Technical Field

The utility model relates to an electrochemical oxidation method sewage treatment technique, supermagnetic separation technique and membrane separation technical field relate to a high COD dyeing wastewater integrated processing system of high salt particularly.

Background

Along with the development of modern industry, the discharge amount of industrial wastewater is increased day by day, the components are complicated day by day, the environment pollution caused by the discharge of a large amount of organic wastewater is serious day by day, and people synthesize more and more complicated organic matters, wherein the organic matters which are difficult to biodegrade account for a large proportion. Such contaminants include: reactive dyes, dye intermediates, polycyclic aromatic hydrocarbons, heterocyclic compounds, halogenated hydrocarbons and the like. The method is characterized in that: the components are complex, the toxicity is high, the chemical oxygen demand is high, and the traditional biological treatment process can not be completely degraded. Along with the gradual improvement of living conditions of people, the problem of environmental pollution is gradually emphasized by people, and the environment protection is enhanced in the countries in recent years, especially aiming at the 'three-cause' organic wastewater difficult to biodegrade. Researchers in a wide range of water treatment fields at home and abroad are always actively searching for efficient water treatment technologies, and how to effectively treat the pollutants is a hotspot and a difficult problem in the water treatment field.

The magnetic flocculation precipitation technology is characterized in that magnetic powder is synchronously added in the traditional coagulation precipitation technology, so that the magnetic powder and pollutant suspended matters are flocculated and combined into a whole to enhance the coagulation and flocculation effects, the generated floc is higher in density and firmer, the high-speed sedimentation separation can be realized under the action of an external magnetic field, and meanwhile, the total phosphorus, total nitrogen and COD content and certain chromaticity in wastewater can be reduced.

The electro-chemical oxidation method (AEOP) which takes a DSA anode as a core is developed to be an environment-friendly technology, the basic principle is that under the action of an electric field, organic matters are directly subjected to oxidation reaction on the surface of an anode material or are oxidized by active species hydroxyl radicals generated by the anode, and finally organic pollutants are mineralized into carbon dioxide and water. The direct oxidation is to generate OH groups by discharging water molecules on the surface of the anode, and the OH groups and organic matters near the anode are subjected to oxidation reaction. The indirect oxidation is to utilize strong oxidant (such as C1O-, high-valence metal ions and the like) generated by electrochemical reaction to oxidize organic matters in solution, and the waste water treated by the electrocatalytic oxidation method has multiple functions of oxidation reduction, condensation, air floatation, sterilization, disinfection, adsorption and the like, and has the advantages of small equipment volume, small occupied area, simple and flexible operation, capability of removing various pollutants, capability of recovering precious metals in the waste water and the like. In recent years, the method has been widely applied to the occasions of treating electroplating wastewater, chemical wastewater, printing and dyeing wastewater, pharmaceutical wastewater, tanning wastewater, papermaking black liquor and the like.

Disclosure of Invention

The utility model mainly solves the technical problem of providing a high-salt and high-COD dyeing wastewater comprehensive treatment system.

In order to achieve the above object, the present invention provides the following technical solutions:

this high COD dyeing wastewater integrated processing system of high salt, including the waste water collecting pit, the super magnetism flocculation and precipitation device, ceramic membrane filter equipment, electric catalytic oxidation device, the evaporation crystallization device that connect gradually.

The supermagnetic flocculation and precipitation device comprises a PAC adding system, a supermagnetic adding system, a PAM adding system, a supermagnetic flocculation mixing and precipitation tank and a plate-and-frame filter press.

The ceramic membrane filtering device adopts a ceramic membrane with the filtering precision that the membrane aperture is between 2nm and 50 nm.

The evaporative crystallization device can adopt a multi-effect evaporative crystallization device or an MVR evaporative crystallization device.

Drawings

The following describes embodiments of the present invention in further detail with reference to the accompanying drawings.

FIG. 1 is a schematic flow chart of the comprehensive treatment system for high-salt and high-COD dyeing wastewater of the utility model;

FIG. 2 is a schematic diagram of the super magnetic flocculation precipitation device of the utility model;

FIG. 3 is a schematic flow diagram of an evaporative crystallization apparatus according to the present invention;

wherein, 1 is a wastewater collecting tank, 2 is a super-magnetic flocculation and precipitation device, 2-1 is a PAC adding system, 2-2 is a super-magnetic adding system, 2-3 is a PAM adding system, 2-4 is a super-magnetic flocculation and mixing coagulation and precipitation tank, 2-5 is a plate-and-frame filter press, 3 is a ceramic membrane filtering device, 4 is an electrocatalytic oxidation device, 5 is an evaporative crystallization device, 5-1 is an evaporative condensate recycling system, 5-2 is an evaporative crystallization system, and 5-3 is a centrifuge.

Detailed Description

In order to make those skilled in the art better understand the technical solution of the present invention, the following detailed description of the present invention is provided with reference to the accompanying drawings and examples.

Referring to fig. 1, the utility model comprises a wastewater collecting tank 1, a supermagnetic flocculation and precipitation device 2, a ceramic membrane filtering device 3, an electrocatalytic oxidation device 4 and an evaporative crystallization device 5 which are connected in sequence.

Referring to fig. 2, the supermagnetic flocculation and precipitation device of the utility model comprises a 2-1PAC adding system, a 2-2 supermagnetic adding system, a 2-3PAM adding system, a 2-4 supermagnetic flocculation mixing and precipitation tank and a 2-5 plate-and-frame filter press.

Referring to fig. 3, the evaporative crystallization apparatus of the present invention may adopt a multi-effect evaporative crystallization or MVR evaporative crystallization apparatus.

The utility model discloses a process to waste water treatment as follows:

after various waste water produced in production is collected through a waste water collecting tank, the effluent of the waste water collecting tank enters a super magnetic flocculation and precipitation device to pretreat the waste water, PAC (polyaluminium chloride) medicament is added to mix firstly, then super magnetic powder is added to continue stirring, after 5 minutes of stirring, PAM (polyacrylamide) medicament is added to continue stirring, suspended matters in the waste water and magnetic powder are flocculated into large floccules to precipitate to the bottom of the tank, the large floccules are pumped into a plate and frame press through a slag slurry pump to be filtered, the aim of primarily decoloring, removing the suspended matters and reducing COD (chemical oxygen demand) is achieved, supernatant liquid and squeezed separated water are obtained, the suspended matters with the particle size of more than 100nm are removed through a ceramic membrane filtering device, filtered concentrated water is pumped into the waste water collecting tank to be circularly treated, the filtered clear liquid passes through an electrocatalytic oxidation device at the depth, the waste water and the chroma are further reduced, the waste water is evaporated and concentrated through an evaporation crystallization system, inorganic salt is separated through a centrifugal machine to be recycled, the evaporation condensate is recycled, and the aim of comprehensively treating the wastewater is fulfilled.

The above is only the preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, many variations and modifications can be made without departing from the inventive concept, and these all fall into the protection scope of the present invention.

Claims

1. The utility model provides a high COD dyeing wastewater integrated processing system of high salt which characterized in that: comprises a wastewater collecting tank, a super-magnetic flocculation precipitation device, a ceramic membrane filtering device, an electrocatalytic oxidation device and an evaporation crystallization device which are connected in sequence.

2. The comprehensive treatment system for dyeing wastewater with high salt and COD according to claim 1 is characterized in that: the supermagnetic flocculation and precipitation device comprises a PAC adding system, a supermagnetic adding system, a PAM adding system, a supermagnetic flocculation mixing and precipitation tank and a plate-and-frame filter press.

3. The comprehensive treatment system for dyeing wastewater with high salt and COD according to claim 1 is characterized in that: the ceramic membrane filtering device adopts a ceramic membrane with the filtering precision that the membrane aperture is between 2nm and 50 nm.

4. The comprehensive treatment system for dyeing wastewater with high salt and COD according to claim 1 is characterized in that: the evaporative crystallization device can adopt a multi-effect evaporative crystallization device or an MVR evaporative crystallization device.