CN217757191U

CN217757191U - High-efficient type printing and dyeing wastewater advanced treatment system

Info

Publication number: CN217757191U
Application number: CN202221402122.XU
Authority: CN
Inventors: 杨鹏坤; 彭瑛; 徐姣龙; 陈文福; 李桂文
Original assignee: Industry University Research Guangzhou Environmental Service Co ltd
Current assignee: Industry University Research Guangzhou Environmental Service Co ltd
Priority date: 2022-06-07
Filing date: 2022-06-07
Publication date: 2022-11-08
Anticipated expiration: 2032-06-07

Abstract

The utility model provides a high-efficient type printing and dyeing wastewater advanced treatment system, including acid-base equalizing basin, biological filter, oxidation pond and sludge thickening tank, the entrance point of acid-base equalizing basin still is connected with the preconditioning catch basin, the exit end of acid-base equalizing basin is connected with the catalysis pond, the exit end of catalysis pond is connected with biological filter's entrance point, biological filter's exit end is connected with the oxidation pond, the exit end of oxidation pond is connected with deep filtration pond, deep filtration pond is provided with sludge outlet, circulation export and delivery outlet, deep filtration pond's sludge outlet is connected with sludge thickening tank, deep filtration pond's circulation export is connected with the entrance point of oxidation pond, the utility model discloses can be effectively to the difficult degradation of chemical industry waste water, pollutant concentration height, the complicated scheduling problem of composition for go out water up to standard, reduce running cost after the processing, also can deal with the demand that goes out water quality of water and propose the mark simultaneously.

Description

High-efficient type printing and dyeing wastewater advanced treatment system

Technical Field

The utility model relates to a printing and dyeing wastewater treatment technical field especially relates to and is a high-efficient type printing and dyeing wastewater advanced treatment system.

Background

Printing and dyeing refers to a process of treating textiles by a chemical or physical method, and mainly comprises the working procedures of pretreatment (desizing, scouring, bleaching, mercerizing and the like), dyeing, printing, finishing and the like. The mixed wastewater generated in each process is the printing and dyeing wastewater. The printing and dyeing wastewater generally has complex components and high organic matter content, and has the characteristics of large water quality fluctuation, strong biological toxicity, deep chromaticity, large alkalinity and the like. Before the 80 s of the last century, the biodegradability of bleaching and dyeing wastewater in China is high, the treatment of printing and dyeing wastewater is mainly discharged after primary (physicochemical) treatment and secondary (biochemical) treatment, but the effluent after biochemical treatment still contains organic pollutants which are difficult to degrade, so that the environment water body is threatened greatly. The discharge amount of the wastewater is increased when the economy is rapidly developed, particularly, the discharged wastewater in industrial production has complex components and high toxicity, if the wastewater cannot be effectively treated, the environment is greatly harmed, and the environment-friendly requirement cannot be met by adopting the traditional conventional biochemical treatment.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model provides a high-efficient type printing and dyeing wastewater advanced treatment system can be effectively to chemical industry waste water difficult degradation, pollutant concentration height, composition scheduling problem complicated for go out water up to standard, reduce running cost after handling, also can deal with the demand that goes out water quality of water and carries the mark simultaneously.

In order to achieve the above purpose, the present invention is realized by the following technical solution: the utility model provides a high-efficient type printing and dyeing wastewater advanced treatment system, includes acid-base equalizing basin, biological filter, oxidation pond and sludge thickening tank, the entrance point of acid-base equalizing basin still is connected with the preliminary adjustment catch basin, the exit end of acid-base equalizing basin is connected with the catalysis pond, the exit end of catalysis pond is connected with the entrance point of biological filter, the exit end of biological filter is connected with the oxidation pond, the exit end of oxidation pond is connected with the depth filtration pond, the depth filtration pond is provided with mud export, circulation export and emission outlet, the sludge outlet of depth filtration pond is connected with sludge thickening tank, the circulation export of depth filtration pond is connected with the entrance point of oxidation pond.

Further, a contact disinfection tank is connected with the discharge outlet of the depth filter tank.

Furthermore, an electrocoagulation-floatation tank is arranged between the preconditioning water collecting tank and the acid-base adjusting tank, the inlet end of the electrocoagulation-floatation tank is connected with the outlet end of the preconditioning water collecting tank, and the outlet end of the electrocoagulation-floatation tank is connected with the inlet end of the acid-base adjusting tank.

Further, the inlet end of the pre-adjusting water collecting tank is also provided with a grid.

Further, a dosing pump is arranged on the oxidation pond.

Furthermore, the deep filtration tank also comprises an ultrafiltration membrane component, a filler, a sludge reflux pump, a cleaning component and a sludge discharge component, wherein the output end of the sludge reflux pump is connected with the sludge concentration tank.

The utility model has the advantages that: the utility model can degrade macromolecular organic matter which is difficult to degrade in the printing and dyeing wastewater into low molecular organic matter, CO2 and water through the oxidation pond, and simultaneously generate ferric salt floc; macromolecular organic matters in the sewage can be decomposed through the biological filter, the biodegradability of the sewage is improved, then the wastewater is biodegraded, the effluent is stable, the content of the organic matters is low, the turbidity is low, an ultrafiltration membrane component in the depth filter tank is effectively protected, and the ultrafiltration membrane component in the depth filter tank is not easy to block; then adopt the depth filtration pond to handle, ultrafiltration membrane subassembly can carry out good effect of holding back to macromolecular substance, can not only separate the floc that aquatic oxidation generated, can hold back bacterium and virus moreover, has guaranteed good play water quality of water, can carry out solid-liquid separation effectively, and the separation effect is far away better than traditional sedimentation tank, and it is good to go out water quality of water, goes out water suspended solid and turbidity and approaches zero, but direct retrieval and utilization has realized sewage resourceization, adopts the utility model discloses a processing technology has the advantage of saving the medicament, reducing sludge amount, energy saving consumption, makes chemical wastewater handle reach optimum treatment.

Drawings

Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:

fig. 1 is a schematic diagram of a connection of the processing system of the present invention.

In the figure: 1. a grid; 2. pre-adjusting the water collecting tank; 3. an electrocoagulation-floatation tank; 4. an acid-base adjusting tank; 5. a catalytic pool; 6. a biological filter; 7. an oxidation pond; 8. a depth filtration tank; 9. a sludge concentration tank; 10. contacting the disinfection tank.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand, the present invention is further described below with reference to the following embodiments.

Referring to fig. 1, an efficient advanced treatment system for printing and dyeing wastewater comprises an acid-base adjusting tank 4, a biological filter 6, an oxidation tank 7 and a sludge concentration tank 9, wherein an inlet end of the acid-base adjusting tank 4 is further connected with a pre-adjusting water collecting tank 2, the printing and dyeing wastewater is collected in the pre-adjusting water collecting tank 2, the water quantity and the pH of the printing and dyeing wastewater are adjusted, an inlet end of the pre-adjusting water collecting tank 2 is further provided with a grating 1, and the grating 1 is used for intercepting large-volume impurities.

The exit end of acid-base equalizing basin 4 is connected with catalysis pond 5, 3 play waters of electrocoagulation-flotation tank get into acid-base equalizing basin 4, through adding the medicine measuring pump with sulphuric acid in adding the waste water, get into acid-base equalizing basin 4 after mixing in the pipeline, acid-base equalizing basin 4 sets up the even stirring of mixer, makes the pH valve adjust to slightly acidic, ensures that the microorganism biochemical condition is normal.

The outlet end of the catalysis tank 5 is connected with the inlet end of the biological filter 6, the catalysis tank 5 adopts ozone to carry out catalytic oxidation reaction, the printing and dyeing wastewater in the acid-base regulation tank 4 is conveyed to the catalysis tank 5, is mixed with ozone generated by an ozone generator and then enters a catalytic oxidation area, and reacts with the ozone under the auxiliary action of a catalyst filter material at the bottom of the catalysis tank 5 to degrade COD in the wastewater, and the treated wastewater enters the biological filter 6 to be treated.

The exit end of biological filter 6 is connected with oxidation pond 7, handles through biological filter 6, decomposes macromolecule organic matter in the sewage, improves sewage biodegradability, then through biological filter 6 biodegradation, reduces the turbidity of organic matter content and waste water.

The outlet end of the oxidation pond 7 is connected with a depth filter pond 8, and the oxidation pond 7 is provided with a dosing pump. The oxidation pond 7 adopts Fenton oxidation for treatment, alkali, hydrogen peroxide, ferrous sulfate, sulfuric acid and PAM medicaments are added into a Fenton oxidation pond 7 in an acid regulation area through a dosing pump for chemical reaction, and after the chemical reaction is stirred and mixed by a hyperboloid stirrer in the acid regulation area, the chemical reaction flows to a reaction area by gravity. The wastewater in the reaction zone fully reacts with the added medicament to generate organic free radicals with refractory organic matters, so that the organic free radicals are structurally destroyed and finally oxidized and decomposed, the organic matters are effectively removed, COD (chemical oxygen demand) is reduced, and the wastewater is decolorized.

The deep filter tank 8 is provided with a sludge outlet, a circulation outlet and a discharge outlet, the sludge outlet of the deep filter tank 8 is connected with a sludge concentration tank 9, and the circulation outlet of the deep filter tank 8 is connected with the inlet end of the oxidation tank 7. The deep filtration tank 8 further comprises an ultrafiltration membrane component, a filler, a sludge reflux pump, a cleaning component and a sludge discharge component, and the output end of the sludge reflux pump is connected with the sludge concentration tank 9. The discharge outlet of the depth filter tank 8 is connected with a contact disinfection tank 10. The wastewater treated by the oxidation tank 7 enters the deep filtration tank 8, and almost all suspended matters and bacteria are retained after being filtered by the ultrafiltration membrane component.

An electrocoagulation-flotation tank 3 is further arranged between the preconditioning water collecting tank 2 and the acid-base adjusting tank 4, the inlet end of the electrocoagulation-flotation tank 3 is connected with the outlet end of the preconditioning water collecting tank 2, and the outlet end of the electrocoagulation-flotation tank 3 is connected with the inlet end of the acid-base adjusting tank 4. The electrocoagulation-floatation tank 3 integrates coagulation, skimming, drainage and sludge discharge and consists of a water distribution area, an electrolysis area, an air floatation area, a sedimentation area and a water outlet area. A series of perforated water distribution pipes are uniformly distributed in the water distribution area of the electrocoagulation-flotation tank 3, and water flows upwards into the electrolysis area. The electrolysis zone is provided with a plurality of groups of polar plates which are connected in parallel, the anode is metallic iron, the cathode is a material which does not dissolve out metallic ions, and the treated water flows into gaps of the polar plates. When direct current passes through the anode, a large amount of ferrous ions are dissolved out and combined with hydroxide ions generated by water electrolysis to generate ferrous hydroxide, flocculation reaction is carried out in wastewater, and suspended particles in the wastewater and emulsified oil such as LAS and the like are coagulated into floccules. Meanwhile, the cathode generates a large amount of tiny hydrogen bubbles when passing direct current, the diameter of the hydrogen bubbles is generally 18-90 μm, and the hydrogen bubbles play a role of an air flotation auxiliary agent. Suspended particles and emulsified oil in the wastewater are attached to the bubbles, and along with the bubbles, a slag layer is formed and is cleaned into a collecting tank through a slag scraper on the top of the tank, so that the water purifying effect is achieved. Oxidation reaction and reduction reaction are also generated in the electrolytic process, heavy metals in water are removed, and COD is reduced. And a mud bucket is arranged at the bottom of the electric flocculation air flotation tank 3, and the mud bucket collects large sediments which are discharged through a mud pipe. The method can demulsify the wastewater, remove suspended matters, surfactants and heavy metal ions, reduce COD, improve the biodegradability of the wastewater, and reduce the cost because no medicament is added in the process.

The working principle is as follows: the printing and dyeing wastewater is discharged after being treated step by sequentially passing through a grating 1, a preconditioning water collecting tank 2, an electrocoagulation-flotation tank 3, an acid-base adjusting tank 4, a catalysis tank 5, a biological filter 6, an oxidation tank 7, a depth filter tank 8 and a contact disinfection tank 10, wherein when the depth filter tank 8 is treated, sludge is discharged to a sludge concentration tank 9, and if the sludge needs to be treated circularly, the sludge can be circulated to the upper-stage oxidation tank 7 for treatment again.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above, it will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, but that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present specification describes embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and it is to be understood that all embodiments may be combined as appropriate by one of ordinary skill in the art to form other embodiments as will be apparent to those of skill in the art from the description herein.

Claims

1. The efficient advanced treatment system for the printing and dyeing wastewater comprises an acid-base adjusting tank (4), a biological filter (6), an oxidation tank (7) and a sludge concentration tank (9), and is characterized in that the inlet end of the acid-base adjusting tank (4) is further connected with a preconditioning water collecting tank (2), the outlet end of the acid-base adjusting tank (4) is connected with a catalysis tank (5), the outlet end of the catalysis tank (5) is connected with the inlet end of the biological filter (6), the outlet end of the biological filter (6) is connected with the oxidation tank (7), the outlet end of the oxidation tank (7) is connected with a deep filtration tank (8), the deep filtration tank (8) is provided with a sludge outlet, a circulation outlet and a discharge outlet, the sludge outlet of the deep filtration tank (8) is connected with the sludge concentration tank (9), and the circulation outlet of the deep filtration tank (8) is connected with the inlet end of the oxidation tank (7).

2. A high-efficiency advanced treatment system for printing and dyeing wastewater as claimed in claim 1, characterized in that a contact disinfection tank (10) is connected with the discharge outlet of the advanced filtration tank (8).

3. The efficient advanced printing and dyeing wastewater treatment system according to claim 2, characterized in that an electrocoagulation-flotation tank (3) is further arranged between the preconditioning collecting tank (2) and the acid-base adjusting tank (4), the inlet end of the electrocoagulation-flotation tank (3) is connected with the outlet end of the preconditioning collecting tank (2), and the outlet end of the electrocoagulation-flotation tank (3) is connected with the inlet end of the acid-base adjusting tank (4).

4. A high-efficiency advanced printing and dyeing wastewater treatment system as claimed in claim 1, characterized in that the inlet end of the pre-adjusting water collecting tank (2) is also provided with a grid (1).

5. The efficient advanced printing and dyeing wastewater treatment system according to claim 1, characterized in that a dosing pump is arranged on the oxidation pond (7).

6. The efficient advanced printing and dyeing wastewater treatment system according to claim 1, characterized in that the advanced filter tank (8) further comprises an ultrafiltration membrane component, a filler, a sludge reflux pump, a cleaning component and a sludge discharge component, and the output end of the sludge reflux pump is connected with the sludge concentration tank (9).