CN217555978U

CN217555978U - Liquid dye wastewater treatment integrated device

Info

Publication number: CN217555978U
Application number: CN202220932210.4U
Authority: CN
Inventors: 楼铮铮; 韩建设; 胡斌斌
Original assignee: Hangzhou Jun Environmental Engineering Co ltd
Current assignee: Hangzhou Jun Environmental Engineering Co ltd
Priority date: 2022-04-21
Filing date: 2022-04-21
Publication date: 2022-10-11
Anticipated expiration: 2032-04-21

Abstract

The utility model relates to a liquid dyestuff effluent treatment plant field discloses a liquid dyestuff effluent treatment integrated device, including the pH equalizing basin that is used for adjusting pH for get rid of the little electrolytic reaction pond of dyestuff waste water colourity and improvement biochemical nature, be used for the fenton oxidation pond of fenton oxidation reaction, be used for the neutralization sedimentation tank of sediment. The utility model discloses an adopt pH to adjust → little electrolytic reaction → fenton oxidation → neutralization and the processing procedure who deposits, can effectively reduce the colourity of liquid dyestuff waste water, simultaneously, also solved the relatively poor, the energy consumption height of traditional liquid dyestuff effluent treatment plant pollutant removal rate, with high costs technical problem.

Description

Liquid dye wastewater treatment integrated device

Technical Field

The utility model relates to a liquid dyestuff effluent treatment plant especially relates to a liquid dyestuff effluent treatment integrated device.

Background

At present, the dye industry waste water treatment is mainly directed to solid dye production waste water, the main decolorization treatment process is mainly a biological method, and a chemical method is adopted as an auxiliary method, and the physical and chemical decolorization methods including an ion exchange method, an ozone oxidation method, an adsorption method, a membrane separation method, an electrolysis method, a coagulation method and the like are adopted at present. But the method has poor effect on the waste water produced by the liquid dye. Compared with solid dye, the liquid dye has the advantages of higher chroma, poorer biodegradability, smaller lignin fiber content, emulsified wastewater and more difficult treatment. The loss of a large amount of dye into the water body not only can affect the appearance of the water body, but also can cause serious pollution to the environment.

Currently, advanced Oxidation Processes (AOPs) are generally adopted for sewage treatment of liquid dyes, mainly including fenton oxidation, ozone oxidation, photocatalytic oxidation, sulfate oxidation, and the like, and persistent organic matters are converted into harmless inorganic substances by decomposing pollutants through generating oxidation active radicals. But has the disadvantages of poor chroma removal rate, high energy consumption, high cost and the like in actual use. For example: chinese patent (patent application number: CN 202121439634.9) is a dye wastewater treatment device for textile industry, and the activated carbon layer is added to decolor and adsorb dyes, so that the removal rate of chromaticity is improved, but the cost is increased, and secondary pollution is easily caused.

SUMMERY OF THE UTILITY MODEL

In order to solve the technical problem that the rate of removal of above-mentioned colourity is relatively poor, the energy consumption is high, with high costs, the utility model provides an integration dyestuff effluent treatment plant, the device uses little electrolytic reaction pond and fenton oxidation pond combination, can effectively get rid of the colourity of dyestuff waste water through little electrolytic reaction, improves the biodegradability of waste water, can effectively promote the effect is got rid of to the difficult degradation organic matter of dyestuff waste water of fenton oxidation reaction, simultaneously, saving cost more.

The utility model discloses a concrete technical scheme does:

an integrated liquid dye wastewater treatment device, comprising:

a pH adjusting tank; a liquid dye wastewater inlet and an acid adding device are arranged in the pH adjusting tank;

a neutralization water tank; the neutralization water tank is provided with an alkali adding device and a flocculating agent adding device;

a micro-electrolysis reaction tank; the water inlet of the micro-electrolysis reaction tank is communicated with the water outlet of the pH adjusting tank;

a Fenton oxidation pond; the Fenton oxidation pond is provided with a hydrogen peroxide dosing device; the water inlet of the Fenton oxidation tank is connected with the water outlet of the micro-electrolysis reaction tank; and the water outlet of the Fenton oxidation pond is communicated with the water inlet of the neutralization pond.

When the device is used, liquid dye wastewater enters a pH adjusting tank through a water inlet, and an acid adding device adds chemicals to adjust the pH. Waste water enters the micro-electrolysis reaction tank through the water pipe, and micro-electrolysis reaction is carried out in the filler layer, so that the chroma is reduced, and the biodegradability is improved. The wastewater enters the Fenton oxidation tank through the water pipe to be subjected to oxidation reaction, so that organic matters which are difficult to degrade in the wastewater are effectively removed. The wastewater enters a neutralization sedimentation tank through a water pipe, alkali is added through an alkali adding device to adjust the pH value, a flocculating agent is added through a flocculating agent adding device to enable metal ions and suspended matters in the wastewater to generate flocculation sedimentation, and the wastewater is discharged through the water pipe to be recycled.

The liquid dye wastewater has the characteristics of large chroma, poor biodegradability, wood fiber containing and emulsification, so that the treatment difficulty is large. And the device of the utility model adopts the treatment process of pH adjustment → micro-electrolysis reaction → Fenton oxidation → neutralization and precipitation, and can effectively reduce the chroma of the liquid dye wastewater. And simultaneously, the utility model discloses still have rational in infrastructure, easy operation, practice thrift the advantage of cost.

Preferably, at least 5 layers of packing layers, and a gas distribution head and a gas distribution plate which are positioned below the packing layers and used for aeration are arranged in the micro-electrolysis reaction tank.

The gas distribution head and the gas distribution plate ensure that oxygen in the wastewater is sufficient through aeration, and the micro-electrolysis effect of the wastewater is promoted. Meanwhile, the shearing force provided by aeration can accelerate the mass transfer efficiency of the wastewater and the packing layer, accelerate the reaction and save the cost.

Preferably, the filler in the filler layer is an iron-carbon filler.

The filler layer is made of iron-carbon filler, and has the advantages of low cost, wide application range, high reaction rate and stable treatment effect.

Preferably, the water inlet of the micro-electrolysis reaction tank is arranged between the packing layer and the gas distribution head, and the water outlet of the micro-electrolysis reaction tank is positioned above the packing layer. The structure can improve the effects of wastewater aeration and micro-electrolysis reaction.

Preferably, at least 4 carrier layers, a filter head and a filter plate for filtering are arranged in the Fenton oxidation pond, and the filter head and the filter plate are positioned below the carrier layers.

After the carrier layer is arranged, the wastewater is coated on the surface of the carrier in a crystallization or precipitation mode by adding the medicament and oxidizing the iron floc after flowing through the carrier layer, and the carrier is intercepted in the reactor, so that the adding amount of the medicament can be reduced, and the cost is saved.

Preferably, the carrier in the carrier layer is quartz sand, magnetite, activated carbon or plastic. The cost can be effectively reduced.

Preferably, the filter head is inserted through the filter plate. The filtering effect is better.

Preferably, the water inlet of the Fenton oxidation pond is arranged below the filter plate, and the water outlet pipe of the Fenton oxidation pond is arranged above the carrier layer. This structure can promote fenton reaction effect and filter effect.

Preferably, a ferrous sulfate dosing device is arranged outside the Fenton oxidation pond.

Preferably, the gas distribution head and the gas distribution plate are micro-power equipment. More energy-saving and environment-friendly.

Compared with the prior art, the utility model has the advantages of it is following:

(1) Use little electrolysis reaction pond and the combination of fenton oxidation pond, can effectively get rid of the colourity of dyestuff waste water through little electrolysis reaction, improve the biodegradability of waste water, can effectively promote the effect is got rid of to the organic matter of difficult degradation in the dyestuff waste water of fenton oxidation reaction, simultaneously, saving cost more.

(2) The iron-carbon filler is selected as the micro-electrolysis material in the micro-electrolysis reaction tank, and has the advantages of low cost, wide application range, high reaction rate and stable treatment effect.

(3) After the carrier layer is arranged in the Fenton reaction tank, the wastewater is coated on the surface of the carrier in a crystallization or precipitation mode by adding iron flocs generated by oxidation after the wastewater flows through the carrier layer, and the carrier is intercepted in the reactor, so that the adding amount of the agent can be reduced, and the cost is saved.

Drawings

Fig. 1 is a perspective view of the present invention.

Fig. 2 is a schematic diagram of an internal structure of the present invention.

The reference signs are: 1. a pH adjusting tank; 2. a micro-electrolysis reaction tank; 3. a Fenton oxidation pond; 4. neutralizing the water tank; 5. a sludge tank; 6. a top cover; 7. a central control system; 11. a water inlet pipe; 13. a first pH meter; 14. a first stirring rod; 15. a water inlet pipe of the micro-electrolysis reaction tank; 16. an acid adding device; 22. a water filter plate; 23. a filler layer; 24. a gas distribution head; 25. a gas distribution plate; 26. overhauling the micro-electrolysis reaction tank; 31. a first pump; 32. a first valve; 33. a water inlet pipe of the Fenton oxidation pond; 34. a carrier layer; 35. a filter head; 36. filtering the plate; 37. a Fenton oxidation pond access hole; 38. a ferrous sulfate dosing device; 39. a hydrogen peroxide dosing device; 41. a water inlet pipe of the neutralization water tank; 42. a second pH meter; 44. a second stirring rod; 46. a water outlet pipe; 47. a sludge pipe; 48. an alkali adding device; 49. a flocculating agent adding device; 51. a sludge outlet; 52. a sludge tank access hole; 61. an odor collection port; 121. a second valve; 122. a third valve; 211. a fourth valve; 212. a fifth valve; 431. a second pump; 432. a third pump; 451. a sixth valve; 452. and a seventh valve.

Detailed Description

The present invention will be further described with reference to the following examples. The devices, connections, and methods referred to in this disclosure are those known in the art, unless otherwise indicated.

Example 1

As shown in fig. 1 and 2, an integrated device for liquid dye wastewater treatment is a double-layer structure, and comprises: a top cover 6, a pH adjusting tank 1, a neutralization water tank 4, a micro-electrolysis reaction tank 2, a Fenton reaction tank 3 and a sludge tank 5. The top of the top cover 6 is provided with an odor collecting port 61.

The pH adjusting tank 1 is arranged on the left side of the top layer of the device and is communicated with the micro-electrolysis reaction tank 2 through a water outlet pipe 15 of the pH adjusting tank; the water inlet and the water outlet of the water outlet pipe 15 of the pH adjusting tank are respectively arranged at the bottom of the pH adjusting tank 1 and the bottom of the micro-electrolysis reaction tank 2; and a water inlet pipe 11 communicated with the outside of the integrated device is arranged in the pH adjusting tank 1. The pH adjusting tank 1 is provided with a first pH tester 13, a first stirring rod 14, an acid adding device 16 and a third valve 122; the third valve 122 is positioned on the water outlet pipe 15 of the pH adjusting tank; the first stirring rod 14 and the acid adding device 16 are both connected with the central control system 7 and used for adjusting the acid adding speed of the acid adding device 16 according to the pH value of the wastewater measured by the first pH meter 13. A second valve 121 is mounted on the water inlet pipe 11.

The neutralization pond 4 is arranged on the right side of the top layer of the device, is connected with the Fenton oxidation pond 3 through a neutralization pond water inlet pipe 41 and is communicated with the sludge pond 5 through a sludge pipe 47; the water inlet and the water outlet of the water inlet pipe 41 of the neutralization pond are respectively arranged at the top of the Fenton oxidation pond 3 and the bottom of the neutralization pond 4; the water inlet and the water outlet of the sludge pipe 47 are respectively arranged at the bottom of the neutralization water tank 4 and the top of the sludge tank 5; an outlet pipe 46 communicated with the outside of the integrated device is arranged in the neutralization water tank 4. The neutralization water tank 4 is provided with a second pH tester 42, a second stirring rod 44, an alkali adding device 48, a flocculating agent adding device 49, a second pump 431 and a seventh valve 452; the second pump 431 is positioned on the inlet pipe 41 of the neutralization pond; the seventh valve 452 is positioned on the sludge pipe 47; the second pH tester 42 and the neutralization pond alkali adding device 48 are both connected with the central control system 7 and used for adjusting the alkali adding speed of the neutralization pond alkali adding device 48 according to the pH value of the wastewater measured by the second pH tester 42; the outlet pipe 46 is provided with a sixth valve 451 and a third pump 432.

The micro-electrolysis reaction tank 2 is arranged on the left side of the bottom layer of the device and is communicated with the Fenton oxidation tank 3 through a Fenton oxidation tank water inlet pipe 33; the water inlet and the water outlet of the Fenton oxidation pond water inlet pipe 33 are respectively arranged at the top of the electrolytic reaction pond 2 and at the bottom of the Fenton oxidation pond 3. The electrolytic reaction tank 2 is provided with a water filtering plate 22, a packing layer 23, a gas distribution plate 25, a micro-electrolytic reaction tank overhaul 26, a fourth valve 211 and a fifth valve 212. The gas distribution head 24 and the gas distribution plate 25 are arranged below the packing layer 23; the packing layer 23 is arranged in the middle of the micro-electrolysis reaction tank 2; the fifth valve 212 is arranged on the gas distribution plate 25; the fourth valve 211 is arranged on the water inlet pipe 33 of the Fenton oxidation tank; the micro-electrolysis reaction tank access hole 26 is arranged outside the shell of the micro-electrolysis reaction tank 2.

The Fenton oxidation pond 3 is arranged in the middle of the bottom layer of the device, is communicated with the micro-electrolysis reaction tank through a Fenton oxidation pond water inlet pipe 33, and is communicated with the neutralization pond through a water outlet of the Fenton oxidation pond 3. The Fenton oxidation pond 3 is provided with a first pump 31, a first valve 32, a carrier layer 34, a filter head 35, a filter plate 36, a ferrous sulfate dosing device 38 and a hydrogen peroxide dosing device 39. The filter head 35 and the filter plate 36 are arranged below the carrier layer 34; the filter head 35 is inserted on the filter plate 36; the carrier layer is arranged in the middle of the Fenton reaction tank 3; the first pump 31 is arranged on a water inlet pipe 33 of the Fenton oxidation tank; the first valve 32 is arranged on the water inlet pipe 41 of the neutralization pond; the ferrous sulfate dosing device 38 and the hydrogen peroxide dosing device 39 of the Fenton oxidation pond are arranged outside the shell of the Fenton oxidation pond 3.

The sludge tank 5 is arranged on the right side of the bottom layer of the device and is communicated with the neutralization water tank 4 through a sludge pipe 47, and a sludge outlet 51 communicated with the outside of the integrated device is arranged in the sludge tank 5. A sludge tank access hole 52 is arranged outside the shell of the sludge tank 5.

The integrated device is characterized in that a central control system 7 is arranged outside the shell, and the central control system 7 is connected with the first valve 121, the first stirring rod 14, the second valve 122, the pH adjusting device 16, the third valve 211, the fourth valve 212, the first pump 31, the first valve 32, the hydrogen peroxide dosing device 38, the ferrous sulfate dosing device 39, the second pump 431, the second stirring rod 44, the sixth valve 451, the third pump 432, the seventh valve 452, the sodium hydroxide dosing device 48, the PAM dosing device 49, the top cover 6, the micro-electrolysis reaction tank access hole 26, the Fenton oxidation tank access hole 37 and the sludge tank access hole 52. The central control system 7 is a conventional central control system in the field, and the internal structure thereof is not the technical essential of the invention.

The working process of the device of the embodiment 1 is as follows: when the device is used, the wastewater enters the pH adjusting tank 1 through the water inlet pipe 11, the first stirring rod 14 is used for stirring, the first pH tester 13 automatically detects pH and feeds the pH back to the central control system 7, and the central control system 7 controls the acidic pH adjusting device 16 to add chemicals to adjust the pH to 2-3 and then opens the third valve 122. The wastewater enters the micro-electrolysis reaction tank 2 from the water outlet pipe 15 of the pH adjusting tank, after the third valve 122 is opened, the central control system 7 controls the fifth valve 212 to open and distribute gas, and simultaneously opens the fourth valve 211 and the first pump 31. Wastewater enters the Fenton oxidation tank 3 from a Fenton oxidation tank water inlet pipe 33 through a first pump 31, the central control system 7 controls a ferrous sulfate dosing device 38 and a hydrogen peroxide dosing device 39 to dose, the wastewater flows through a carrier layer 34 through a filter head 35 arranged on a filter plate 36, and the reaction time is longer than 6.0 h (specifically set according to actual water quality and water quantity). After the reaction time is reached, the central control system 7 controls to open the first valve 32 and the second pump 431 (the pH value is about 4-5 at the moment), wastewater enters the neutralization water tank 4 from the neutralization water tank water inlet pipe 41 through the second pump 431, the wastewater is stirred by the second stirring rod 44, the central control system 7 controls the neutralization water tank alkali adding device 48 to add sodium hydroxide to adjust the pH value, the second pH measuring instrument 42 detects the pH value and feeds the pH value back to the central control system 7, the central control system 7 controls to close the alkali adding device 48 when the pH value is 8-9, the flocculating agent adding device 49 is opened to add PAM, the central control system 7 controls the second stirring rod 44 to stir for 30 min, the wastewater is statically precipitated by more than 1.0 h, and the wastewater is intermittently operated (the total residence time is determined by actual water quality and water quantity). After the retention time is reached, the central control system 7 controls and opens the sixth valve 451 and the third pump 432, the wastewater flows out from the water outlet pipe 46 through the third pump 432 for recycling, meanwhile, the central control system 7 controls and opens the seventh valve 452, and the sludge enters the sludge tank 5 through the sludge pipe 47 and is discharged from the sludge outlet 51. The odor is discharged through the odor collection port 51. During maintenance, the central control system 7 firstly controls the first valve 121, the first stirring rod 14, the second valve 122, the pH adjusting device 16, the third valve 211, the fourth valve 212, the first pump 31, the fifth valve 32, the hydrogen peroxide dosing device 38, the ferrous sulfate dosing device 39, the second pump 431, the second stirring rod 44, the sixth valve 451, the third pump 432, the seventh valve 452, the alkali dosing device 48 and the flocculant dosing device 49 to be closed, then the top cover 6 is removed, and finally the micro-electrolysis reaction tank maintenance port 26, the Fenton oxidation tank maintenance port 37 and the sludge tank maintenance port 52 are maintained.

The above, only be the utility model discloses a preferred embodiment, it is not right the utility model discloses do any restriction, all according to the utility model discloses the technical entity all still belongs to any simple modification, change and equivalent structure transform of doing to above embodiment the utility model discloses technical scheme's protection scope.

Claims

1. The utility model provides a liquid dyestuff waste water treatment integrated device which characterized in that includes:

a pH adjusting tank (1); a liquid dye wastewater inlet (11) and an acid adding device (16) are arranged in the pH adjusting tank (1);

a neutralization pond (4); the neutralization water tank (4) is provided with an alkali adding device (48) and a flocculating agent adding device (49);

a micro-electrolysis reaction tank (2); the water inlet of the micro-electrolysis reaction tank (2) is communicated with the water outlet (15) of the pH adjusting tank (1);

a Fenton oxidation pond (3); the Fenton oxidation pond (3) is provided with a hydrogen peroxide dosing device (39); a water inlet (33) of the Fenton oxidation pond (3) is connected with a water outlet of the micro-electrolysis reaction pond (2); and the water outlet of the Fenton oxidation pond (3) is communicated with the water inlet (41) of the neutralization pond (4).

2. The integrated liquid dye wastewater treatment device according to claim 1, wherein at least 5 packing layers (22), and a gas distribution head (24) and a gas distribution plate (25) which are positioned below the packing layers (22) and used for aeration are arranged in the micro-electrolysis reaction tank (2).

3. The integrated liquid dye wastewater treatment device as set forth in claim 2, characterized in that the filler in the filler layer (22) is iron-carbon filler.

4. The integrated liquid dye wastewater treatment device according to claim 2, wherein the water inlet of the micro-electrolysis reaction tank (2) is arranged between the filler layer (22) and the gas distribution head (24); the water outlet of the micro-electrolysis reaction tank (2) is positioned above the packing layer (22).

5. An integrated liquid dye wastewater treatment device according to claim 1, wherein the Fenton oxidation pond (3) is provided with at least 4 carrier layers (34), and a filter head (35) and a filter plate (36) which are arranged below the carrier layers (34).

6. The integrated liquid dye wastewater treatment device according to claim 5, wherein the carrier in the carrier layer (34) is quartz sand, magnetite, activated carbon or plastic.

7. The integrated liquid dye wastewater treatment device according to claim 5, wherein the filter heads (35) are inserted on the filter plates (36).

8. The integrated liquid dye wastewater treatment device according to claim 5, wherein the water inlet of the Fenton oxidation pond (3) is arranged below the filter plate (36), and the water outlet of the Fenton oxidation pond (3) is arranged above the carrier layer (34).

9. The integrated liquid dye wastewater treatment device according to claim 1, wherein a ferrous sulfate dosing device (38) is arranged outside the Fenton oxidation pond (3).

10. The integrated liquid dye wastewater treatment device according to claim 2, wherein the gas distribution head (24) and the gas distribution plate (25) are micro-power devices.