JP3100053U - Waste liquid treatment equipment - Google Patents

Abstract

[PROBLEMS] To neutralize strongly alkaline waste liquid and remove high-concentration organic substances contained therein, strong neutralization is required during neutralization to improve reactivity, while floc-like aggregation generated by aggregation and solidification is required in a subsequent step. Because of the need to make the objects as large as possible, weak stirring is required. Adjustment of these stirring operations is extremely difficult, and the water content of the aggregate separated by filtration is high, which is inconvenient in handling.
A baffle (6) is provided at a position where the inner periphery of a cylindrical container (1) having a function of reciprocating in the circumferential direction by eccentric cam drive is divided into a plurality of parts, and an electric motor for automatically discharging a processing liquid to a lower part of the cylindrical container. A reaction tank in which an operation valve 7 is installed, a wire mesh 9 arranged to introduce the treatment liquid into a lower portion of the reaction tank, a wire mesh 9 on which a filter medium 10 is laid, and a filter tank 8 in which a receiving tank for storing the filtrate is arranged at a lower portion; A waste liquid treatment apparatus comprising a suction pump 12 for sucking and discharging a filtrate in a filtration tank.
[Selection diagram] Fig. 1

Description

The present invention mainly relates to an apparatus for treating a waste liquid containing strongly alkaline and high-concentration organic substances generated in an air-conditioning indoor unit cleaning, floor cleaning, floor coating peeling processing and the like.

In an air-conditioning indoor unit cleaning, floor cleaning, and floor coat peeling treatment, an alkaline liquid is used to enhance the cleaning effect, and a strong alkaline waste liquid having a pH of 12 or more is generated. Usually, these waste liquids are in a small amount of 50 m ³ / day or less, so they are not applicable to the sewage discharge standard. However, discharging such strong alkaline water is not preferable in terms of sewage treatment equipment operation. . Further, these waste liquids contain a polymer resin or the like used as a coating agent, and discharging them as it is leads to discharge of high-concentration organic substances, which increases the environmental load and is a problem.
Conventionally, in order to solve these problems, to neutralize the waste liquid by adding an acid, and to promote coagulation and solidification of the floating substance generated by precipitation of the polymer resin dissolved with the neutralization To form a floc, and then the floc-like aggregate was separated.
For example, the waste liquid is put into a processing container such as a pail can or a bucket, and while the neutralizing agent and the coagulant are being dissolved little by little, stirring is performed for about 10 minutes to adjust the pH to a neutral range of 6.5 to 7.5, Coagulate and solidify the floating substance. Next, a method is used in which the waste liquid after the treatment is allowed to stand to form a floc, and the floc-like aggregate is scooped up and separated and removed.

In the above-mentioned alkaline waste liquid treatment, strong neutralization is required to improve the reactivity during neutralization, but in order to increase the filtration rate in the subsequent process and reduce the aggregates leaking out into the filtrate, it is generated by coagulation and solidification. It is necessary to make the floc-like aggregates as large as possible, which requires weak stirring. It is very difficult to adjust these stirring operations by the conventional manual method, and the water content of the aggregate separated by filtration is high, which is extremely inconvenient in handling such as subsequent combustion disposal. Further, the neutralization treatment, the introduction of the chemical, the stirring, the separation and removal of the aggregates, and the disposal of the treated water are manually performed, and have a drawback that time and labor are required.
An object of the present invention is to solve the above-mentioned problem, and an object of the present invention is to provide a waste liquid treatment apparatus capable of efficiently neutralizing a strongly alkaline waste liquid and removing high-concentration organic substances contained therein in a short time.

The present invention provides an apparatus for treating an alkaline waste liquid, in which a baffle is provided at a position where the inner periphery of a cylindrical container having a function of reciprocating in the circumferential direction by eccentric cam drive is divided into a plurality of portions, and a lower portion of the cylindrical container is treated. A reaction tank equipped with an electrically operated valve that automatically discharges the liquid, a filtration tank arranged so as to introduce the treatment liquid into the lower part of the reaction tank, a wire mesh lined with a filter medium at the top, and a receiving tank for storing the filtrate at the bottom. And a suction pump for sucking and discharging the filtrate in the filtration tank.

In the above invention, the cylindrical container is reciprocating in the circumferential direction, and the processing waste liquid in the cylindrical container is swept in the opposite direction at regular time intervals along the circumference by the baffles installed along the inner circumference. It is. For this reason, the processing waste liquid in the cylindrical container generates a flow that reverses at regular time intervals, and the effect of mixing with the neutralizing agent or the coagulant sequentially added to the waste liquid is remarkably improved. As a result, even if the stirring time is shortened, the neutralization / aggregation reaction proceeds reliably.
Further, unlike the case where mixing is performed by installing stirring blades inside the cylindrical container, the generated floc-like aggregates do not directly come into contact with the rotating object and are not torn off, so that the floc-like aggregates become large without being destroyed. This reduces the filtration resistance in the filtration / separation step, thereby providing an effect of dramatically shortening the filtration time.
Also, the amount of aggregates that pass through the filter medium and leak into the filtrate is reduced. Furthermore, the processing liquid discharged into the filtration tank is filtered in a state where the pressure inside the filtration tank is reduced by the reduced pressure suction of the suction pump, so that the filtration speed is significantly increased, and the neutralization / aggregation reaction and the filtration are combined. The treatment time is greatly reduced, and the water content of the aggregate separated by filtration becomes extremely small.
Therefore, with the waste liquid treatment apparatus of the present invention, the working time can be reduced and labor can be saved.

An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram of one embodiment of the present invention, and FIG. 2 is an example of a partially enlarged view of a reactor assembled state.

When the eccentric cam 3 attached to the drive motor shaft 2 with the inverter rotates, this rotational motion is transmitted to the drive arm 5 via the connecting rod 4, and reciprocates the cylindrical container 1 in the circumferential direction.
Since the rotation speed of the drive motor shaft 2 with an inverter can be freely changed by the inverter, the speed of the reciprocating motion of the cylindrical container 1 in the circumferential direction can be adjusted so as to be optimal for the stirring effect and the generation of flocs. It is.

On the inner surface of the cylindrical container 1, a baffle 6 was installed at a position where it was divided into four parts, a discharge port was provided at the center of the bottom, an electrically operated valve 7 was attached, and the lower piping of the electrically operated valve 7 was installed immediately below. It is open to the surface of the filter medium 10 of the filter tank 8.

After the drive motor shaft 2 is started, a timer is set so that the drive motor shaft 2 stops after a set time (5 to 10 minutes) and a series of operations until the electric operation valve 7 opens at the same time. Changes are possible.

Put 40 liters of strong alkaline building floor cleaning wastewater of pH 12 or more into a cylindrical container 1 having a capacity of 70 liters, start automatic operation, and then add a flocculant and a neutralizing agent sequentially until the pH becomes 6.5 to 7.5. Neutralize / aggregate.

The waste liquid after the neutralization and agglomerate generation process, which has been extracted from the outlet at the center of the bottom of the cylindrical container 1, flows into the filter medium 10 in the filter tank 8. The filtration tank 8 has a function of separating floc-like aggregates from wastewater, and the aggregates deposited on the filter medium 10 laid on the wire mesh 9 are removed together with the filter medium 10 after a series of operations, and the waste is removed. And processing such as combustion. As the filter medium 10, paper or cloth, which is widely used, can be used.

In order to discharge wastewater in the filtration tank 8 to the outside, a discharge hose 11 is attached to a side of the filtration tank 8 and connected to a suction pump 12. By using a vacuum pump, the suction pump 12 separates floc-like aggregates onto the filter medium 10 while keeping the inside of the filtration tank 8 under reduced pressure, so that the filtration speed can be remarkably increased, and the aggregates contain water. The rate can also be reduced.

In the present embodiment, the volume of the cylindrical container 1 is set to 70 liters, and the number of the baffles 6 is set to 4. However, the present invention is not limited to these, and the volume can be freely selected depending on the amount of waste liquid to be treated.
Through the above operation, the wastewater for cleaning the floor of a building containing a large amount of organic substances such as high-polymer resins and a strong alkali having a pH of 12 or more becomes a neutral solution from which the organic substances have been removed, and does not increase the environmental burden even if discharged into the sewer. Purified to the level.

The air-conditioning indoor unit cleaning waste liquid and the floor coat peeling treatment waste liquid can be treated in the same manner as the building floor cleaning waste liquid.

FIG. 3 is an explanatory diagram of an apparatus according to an embodiment of the present invention. FIG. 3 is a partially enlarged view of the reactor according to the present invention in an assembled state.

Explanation of reference numerals

1 Cylindrical container
2 Drive motor shaft
3 Eccentric cam
4 Connecting rod
5 Drive arm
6 Baffle
7 Electric operated valve
8 Filtration tank
9 Wire mesh
10 Filter media
11 Discharge hose
12 Suction pump

Claims (1)

In an apparatus for treating an alkaline waste liquid containing an organic substance, a baffle is provided at a position where the inner periphery of a cylindrical container having a function of reciprocating in the circumferential direction by eccentric cam drive is divided into a plurality of portions, and a lower portion of the cylindrical container is treated. A reaction tank equipped with an electrically operated valve that automatically discharges the liquid, a filtration tank arranged so as to introduce the treatment liquid into the lower part of the reaction tank, a wire mesh lined with a filter medium at the top, and a receiving tank for storing the filtrate at the bottom. And a suction pump for sucking and discharging the filtrate in the filtration tank.

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