JPS6012632Y2 - Effluent treatment equipment - Google Patents

Description

[Detailed description of the invention] This invention relates to a device that treats not only heavy metals but also COD (chemical oxygen demand) wastewater. The treatment maintains high efficiency of the oxidation catalyst function and also enables low running costs.

Conventionally, it has generally been impossible to treat heavy metal waste liquids and oxidizable substance-containing waste liquids using the same treatment apparatus because the processing purposes and processing steps are different.

In addition, hydrogen peroxide, etc. are added to treat high-concentration COD wastewater, but this is dangerous as reaction heat is generated during oxidative decomposition, and neutralization with caustic soda after oxidative decomposition causes COD However, even if slaked lime was added, there were problems such as clogging of pipes, and it was difficult to implement this system.

The present invention solves these conventional problems and can treat a wide variety of waste fluids. It also improves safety by simultaneously adding waste fluid and oxidizing agent and injecting an antifoaming agent, and reduces running costs. The present invention provides a new waste liquid treatment device that is lightweight and compact.

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 is a front view showing the main body of the processing device incorporating the device of the present invention in a line drawing manner. There is an instrument panel 2 in which are arranged side by side, and on the upper right support stand 3 there is a chemical tank group 4, from the right, a coagulant tank 5, an antifoam tank 6, an acid tank 7, and an iron powder feeder 8. They are arranged in sequence, and on the intermediate support frame 9 are installed an alkali tank 10 and a reaction tank 11 with a stirrer arranged above.

Furthermore, a filtration tank 12 and a treated water tank 13 are located below the intermediate support frame.
are arranged above and below, and each pump and oxidizer storage tank (
A hydrogen peroxide tank 19) is built in the blank space.

FIG. 2 is a front view showing a portable collection tank, in which a PH indicator, an acid tank, and an agitator are installed on the upper part of the body 14, and an oil absorption cylinder 15 is installed on the right side.

Figure 3 shows the machine body 1 in Figure 1 and the portable collection tank 1 in Figure 2.
4 is a processing liquid system diagram when pipe-connected.

Thus, the heavy metal waste liquid poured into the portable collection tank 14 directly enters the reaction tank 11 and is neutralized by injecting alkali from the alkali tank 10.

In the case of wastewater containing oxidizable substances, acid is injected from the acid tank installed at the top of the portable collection tank 14, and the pH is adjusted to 2~2.
After adjusting to 3, the hydrogen peroxide is passed through the oil adsorption column 15 and injected into the reaction tank 11 by a pump. At this time, hydrogen peroxide in the hydrogen peroxide tank 19 is also injected into the reaction tank 11 by the pump 20.

Water vapor generated by the oxidation reaction is extracted from the system through the draft pipe 18.

This prevents water vapor generated by the heat of oxidation of the oxidizable substance from overflowing from the reaction tank and condensing within the apparatus, thereby shortening the life of the apparatus.

However, in this case, it is also possible to directly pump the oxidizable substance waste liquid or heavy metal waste liquid that does not contain tar-based oil to the reaction tank 11 of the main body 1 without using the portable collection tank 14. .

Next, while maintaining the pH of the waste liquid fed into the reaction tank 11 at 2 to 3, an oxidation catalyst is further injected from the iron powder feeder 8 and an antifoaming agent is further injected from the antifoaming agent tank to raise the reaction temperature to about 50°C. Control and process for about 3 inches.

Next, alkali is injected with a pump from the alkaline tank 10, and P
After adjusting H to about 10, the mixture is stirred for about 30'5-J, and a flocculant is added from the flocculant tank 5. After stirring and standing still, the supernatant water is removed from the supernatant water drain valve and enters the filtration tank 12.

The sludge settles at the bottom of the reactor and is used again as an oxidation catalyst in the next wastewater treatment.

Finally, the sludge is sent from the sludge extraction valve 16 to a filtration tank installed below (this tank may be separate from the above-mentioned supernatant water filtration tank 12), and the pH of the furnace liquid is adjusted by pump circulation in the treated water tank 13 located below. After that, the water is discharged from the discharge port 17.

The above operations are controlled by a time processor,
The system automatically processes wastewater while selecting the appropriate treatment process.

As described in detail above, the wastewater treatment device according to the present invention can directly neutralize heavy metal wastewater, and can directly neutralize heavy metal wastewater, and can also treat various types of wastewater, such as photographic wastewater, X-ray wastewater, and disinfection wastewater, which are wastewaters containing oxidizable substances. Different types of waste liquid can be efficiently treated with one device, and the entire device can be made lighter and smaller.

In addition, according to the present invention, the oxidation catalyst can be used repeatedly, so running costs can be reduced.
It has the advantage of being quiet and allows for very simple and safe decomposition of oxidizable substance-containing waste fluids, which was previously considered impossible.

[Brief explanation of drawings]

Fig. 1 is a line drawing front view showing the main body of the waste liquid treatment device incorporating the device of the present invention, Fig. 2 is a portable waste liquid collection tank equipped with an oil adsorption cylinder, and Fig. 3 is the waste water treatment device according to the present invention. It is a processing system diagram of a liquid. 1... Main body, 2... Instrument panel, 3...
... Upper right support frame, 4... Chemical tank group, 5.
...Flocculant tank, 6...Defoaming agent tank, 7...
...Acid tank, 8...Iron powder feeder 9...
...Intermediate support frame, 10...Alkali tank, 11
...Reaction tank, 12...Filter tank, 13.
...Treatment water tank, 14...Portable collection tank,
15... Oil adsorption cylinder, 16... Sludge extraction valve, 17... Outlet port, 18...
...Steam draft piping, 19...Hydrogen peroxide tank, 20...Pump.

Claims (1)

[Claims for Utility Model Registration] A portable wastewater collection tank equipped with a PH indicator, a stirrer, an acid injection tank, and an oil adsorption cylinder; P) (An indicator, a stirrer, oxidation treatment of high COD wastewater and heavy metal content Iron powder feeder that also serves as wastewater treatment, antifoam tank, acid tank, alkaline tank, reaction tank with draft piping material for removing water vapor generated in the oxidation reaction of high COD wastewater, and after oxidation treatment of high COD wastewater. This machine is equipped with a filtration tank, a treated water tank, a hydrogen peroxide tank, a pump, and a pump to recover iron-based materials for reuse. A small portable wastewater treatment device for wastewater containing heavy metals or oxidizable substances, which selectively treats wastewater containing heavy metals or oxidizable substances.