CN217418382U - Leachate treatment equipment - Google Patents

Abstract

The utility model discloses a filtration liquid treatment facility, include former pond, fenton oxidation tower, settling tower, flocculation reaction pond, plate and frame filter press, triple effect evaporation system, sand filter, carbon filter and reverse osmosis system that communicate according to the preface. Compared with the prior art, the device can effectively treat the percolate, has the advantage of higher treatment efficiency, and can relieve the overload phenomenon of the urban sewage treatment plant.

Description

Leachate treatment equipment

Technical Field

The utility model relates to a filtration liquid treatment technical field especially relates to a filtration liquid treatment facility.

Background

At present, the national cities develop rapidly, and the generation amount of hazardous wastes of industrial enterprises is in a situation of increasing year by year. The limit of hazardous waste is continuously strengthened in China, and a closed-loop management system for hazardous waste disposal is increasingly improved. The most applied harmless treatment method at home and abroad is the landfill method, but one main content of landfill design and management is the control and treatment of leachate. Leachate contains high-concentration organic matters and toxic substances, has complex water quality, large water quality change and large environmental pollution, causes more serious secondary pollution to the environment due to improper treatment, and has properties changing with the composition, year, geography and climate environment of waste. Therefore, the problems of leachate treatment, such as leachate salt enrichment in the landfill, high energy consumption of treatment engineering, unclear leachate removal and the like caused by aging of the landfill, carbon-nitrogen ratio imbalance, denitrification and recharging of concentrated solution after membrane are always one of the key research points and difficulties at home and abroad. Currently, there is still a lack of treatment systems for leachate.

Disclosure of Invention

The embodiment of the utility model provides a filtration liquid treatment facility can effective processing filtration liquid, and it has the higher advantage of treatment effeciency.

In order to achieve the above object, the embodiment of the utility model provides a leachate treatment facility, include former pond, fenton oxidation tower, settling tower, flocculation reaction tank, plate and frame filter press, triple effect evaporation system, sand filter, carbon filter and reverse osmosis system that communicate according to the preface.

Compared with the prior art, the device can effectively treat the percolate, has the advantage of higher treatment efficiency, and can relieve the overload phenomenon of the urban sewage treatment plant.

As an improvement of the scheme, the raw water pool is connected with a first medicine adding tank.

As an improvement of the scheme, the first dosing tank is a sulfuric acid dosing tank.

As an improvement of the scheme, the Fenton oxidation tower is connected with a second medicine adding tank and a third medicine adding tank.

As an improvement of the scheme, the second dosing tank is a hydrogen peroxide dosing tank, and the third dosing tank is a ferrous sulfate dosing tank.

As an improvement of the scheme, the settling tower is connected with a fourth medicine adding tank.

As an improvement of the scheme, the fourth medicine adding tank is a sodium hydroxide medicine adding tank.

Other beneficial effects are as follows:

1. in order to improve holistic treatment efficiency, be convenient for add the medicine in to former pond and carry out the acidizing, former pond is connected with first medicine adding jar, and first medicine adding jar is sulphuric acid medicine adding jar. Similarly, in this embodiment, the fenton oxidation tower is connected to a second dosing tank and a third dosing tank, the second dosing tank is a hydrogen peroxide dosing tank, and the third dosing tank is a ferrous sulfate dosing tank; the sedimentation tower is connected with a fourth medicine adding tank which is a sodium hydroxide medicine adding tank.

Drawings

Fig. 1 is a schematic diagram of an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

At present, the generation amount of hazardous wastes of industrial enterprises is in a year-by-year increasing situation. The limit of hazardous waste is continuously strengthened in China, and a closed-loop management system for hazardous waste disposal is increasingly perfected. The treatment of leachate is one of the key points and difficulties in research at home and abroad. Currently, there is still a lack of treatment systems for leachate. So this scheme provides a filtration liquid treatment facility, can effective processing filtration liquid, and it has the higher advantage of treatment effeciency. The specific scheme is as follows:

referring to fig. 1, fig. 1 is a schematic diagram of the embodiment of the present invention.

A leachate treatment device comprises a raw water tank 1, a Fenton oxidation tower 2, a precipitation tower 3, a flocculation reaction tank 4, a plate-and-frame filter press 5, a three-effect evaporation system 6, a sand filter 7, a carbon filter 8 and a reverse osmosis system 9 which are sequentially communicated.

The process for recycling the water in the leachate treatment specifically comprises the following steps:

illustratively, when the device is used for treating the percolate, the specific process is as follows:

(1) adding a sulfuric acid solution into the percolate in the raw water pool 1, acidifying (adding 30% sulfuric acid and adjusting the pH value to 3), reducing Cr6+ into Cr3+ through an acidification reduction reaction, leading the raw water to flow into a Fenton oxidation tower 2 after being acidified, adding ferrous sulfate and hydrogen peroxide (adding ferrous sulfate (the concentration is 10%) accounting for 5% of the mass of the raw water and adding hydrogen peroxide (the concentration is 30%) accounting for 3% of the mass of the raw water) into the Fenton oxidation tower 2, and then carrying out Fenton complex breaking by Fenton oxidation of the raw water in the Fenton oxidation tower 2 for 2 hours. Under the acidic condition, H2O2 generates hydroxyl radicals (OH) with strong oxidizing capability in the presence of Fe2+, and initiates more other active oxygen to degrade organic matters.

The raw water after the fenton reaction enters a settling tower 3, sodium hydroxide with the concentration of 30% is added into the settling tower 3 for acid-base neutralization, the pH value of the raw water is adjusted to 12, then the raw water enters a flocculation reaction tank 4, PAC (with the concentration of 5%) and PAM (with the concentration of 1%) are added into the flocculation reaction tank 4, wherein the PAC accounts for 5% of the mass of the raw water, and the PAM accounts for 1% of the mass of the raw water, and are subjected to flocculation precipitation for 30min, so that heavy metal components and suspended matters in the water form flocculent precipitates, and then the flocculent precipitates enter a plate-and-frame filter press 5 and are filtered by the plate-and-frame filter press 5 to remove the precipitates, so that a filtrate 1 is obtained.

(2) The filtrate 1 is introduced into a triple effect evaporation system 6 for processing (negative pressure of-70 KPa, temperature of 60 ℃). Volatile substances in the treated water are not effectively removed, and are pretreated by a sand filter 7 and a carbon filter 8 before entering a reverse osmosis system 9, so that the pollution and blockage of the membrane are reduced, the cleaning frequency is reduced, the maintenance cost is reduced, and the irreversible pollution and blockage are prevented.

It should be noted that the filter material of the sand filter 7 is quartz sand, which has strong adaptability, small filtration resistance, large specific surface area, high filtration precision, strong acid and alkali resistance, good contamination resistance, and the like, can effectively remove suspended matters in water, and has an obvious removing effect on pollutants such as colloids, iron, organic matters, pesticides, manganese, bacteria, viruses, and the like in water.

The main technical parameters of the sand filter 7 are as follows: the water filtration amount is 6-8m3/h, the height of the quartz sand bearing layer is 800mm, the filtration period is 4-72h, the design pressure is 0.6Mpa, the pressure difference of an inlet and an outlet is 0.05Mpa, the maximum working pressure is 0.6Mpa, the strength of backwash water is 10-12L/(m2 s), and the pressure of backwash water is 0.1 Mpa.

The filter material of carbon filter 8 is active carbon, and deodorization, dechlorination can the quick separation aquatic insoluble substance, cuts the macromolecule solid particle and the colloid of leaving aquatic, can effectively adsorb organic matter and the colourity in aqueous for RO reverse osmosis system 9's preprocessing equipment reduces the load for follow-up workshop section.

The main technical parameters of the carbon filter 8: the water filtration amount is 6-8m3/h, the height of an active carbon filter material layer is 1000mm, the height of a quartz sand bearing layer is 500mm, the filtration period is 4-72h, the design pressure is 0.6Mpa, the pressure difference of an inlet and an outlet is 0.05Mpa, the maximum working pressure is 0.6Mpa, the strength of backwash water is 14-16L/(m2 s), and the pressure of backwash water is 0.1 Mpa. After sand filtration and carbon filtration, filtrate 2 was obtained.

(3) The filtrate 2 is passed to a reverse osmosis system 9. Most of salinity, colloid, organic matters and the like in the water cannot permeate the reverse osmosis membrane, and the residual part in a small amount of concentrated water, namely the concentrated water, is discharged from the concentrated water pipe; most of water molecules and trace other ions permeate the reverse osmosis membrane, and are collected to form product water which is discharged by a fresh water pipe, and the water quality detection result is shown in table 1.

The leachate treated by the equipment has the water quality detection result of product water meeting the process and product water quality standard required by urban sewage recycling industrial water quality, and the effluent is reused in the production process.

The treatment effect of this equipment is good, and filtration liquid reaches the water quality standard after handling, can used repeatedly in certain extent, realizes water economy resource and the dual function of treating pollution, can alleviate urban sewage treatment plant's overload phenomenon. Meanwhile, the water recycling process for treating the percolate has universality and does not need to be continuously adjusted along with the change of the pollution characteristic of the percolate. The leachate recycling process treated by the device can save the construction and operation cost of subsequent sewage treatment facilities, effectively reduce the treatment cost and the treatment difficulty, simplify the treatment process, reduce the difficulty of subsequent sewage treatment, and has wide application prospect.

TABLE 1

More preferably, in this embodiment, in order to improve the overall treatment efficiency and facilitate the acidification of the raw water tank 1 by adding drugs, the raw water tank 1 is connected to a first drug adding tank 10, and the first drug adding tank 10 is a sulfuric acid drug adding tank.

Similarly, in this embodiment, the fenton oxidation tower 2 is connected to a second dosing tank 12 and a third dosing tank 13, the second dosing tank 12 is a hydrogen peroxide dosing tank, and the third dosing tank 13 is a ferrous sulfate dosing tank; the precipitation tower 3 is connected with a fourth medicine adding tank 11, and the fourth medicine adding tank 11 is a sodium hydroxide medicine adding tank.

The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations are also considered as the protection scope of the present invention.

Claims (7)

1. The utility model provides a leachate treatment facility which characterized in that, includes former pond, fenton oxidation tower, settling column, flocculation reaction tank, plate and frame filter press, triple effect evaporation system, sand filter, carbon filter and reverse osmosis system that communicate in proper order.

2. The leachate treatment plant of claim 1, wherein a first dosing tank is connected to the raw water basin.

3. The leachate treatment plant of claim 2, wherein said first dosing tank is a sulfuric acid dosing tank.

4. The leachate treatment plant of claim 1, wherein said Fenton oxidation column is connected to a second dosing tank and a third dosing tank.

5. The leachate treatment apparatus of claim 4, wherein the second dosing tank is a hydrogen peroxide dosing tank and the third dosing tank is a ferrous sulfate dosing tank.

6. The leachate treatment plant of claim 1, wherein said settling tower is connected to a fourth dosing tank.

7. The leachate treatment apparatus of claim 6, wherein said fourth dosing tank is a sodium hydroxide dosing tank.

Images