JPS58183990A - Aerator - Google Patents

Abstract

PURPOSE:To reduce the amount of consumed electric power for a blower, by providing a sparger pipe for diffusing gas into each group of aeration tanks, a dissolved oxygen meter in optional one of the group of aeration tanks and an airflow-adjusting valve for adjusting the flow amount of gas on the basis of a measured value from the dissolved oxygen meter. CONSTITUTION:An airflow-adjusting valve 7a-7c is provided at each of the inlet sides of a sparger pipe 6a passing crosswise through the vicinity 11 of the inlet of each aeration tank, a sparger pipe 6b passing crosswise through the center 22 of each aeration tank and a sparger pipe 6c passing crosswise through the vicinity 13 of the outlet of each aeration tank. A DO value is detected by a dissolved oxygen (DO) meter 3a provided in the vicinity 11 of the inlet and inputted to a DO-controlling unit 21a. In the DO-controlling unit 21a, the process value measured by the DO meter 3a is compared with an objective DO value preset by a unit 23a for setting a DO value, to perform PI control.

Description

[Detailed Description of the Invention] [Technical Field] The present invention is a straight aeration type for water treatment - installation of aeration pipes to send aeration air according to the air condition.

- According to the distribution of 1 chain of yukata acid wood (hereinafter referred to as DO and 105) in the cypress,
Control of the air vent control valve 6 - Related 〇 [Technical weight] In the straight type diffuser type - air cypress C2, as shown in Fig. 1, the inflow sewage 8 is From waterway 4 - air tank group 1
The 0-vapor phase air that flows into the channels a to 1f, is aerated here, and is discharged into the outflow waterway 5 as cypress treated water 9 is sent to the blower 2.
The air diffused by ``#61=Thus 4!r#
I am sending it to Hiki Hinoki group.

To adjust the air flow rate, for economical reasons, any one of the aeration valves is installed on a cypress, and from the change in the DO value, the air flow control valve 7 The required air volume is supplied by controlling the

With this configuration, one point in a certain aeration tank is captured, and a total of 3
Control is performed at once to set the DO4 shift determined in The degree distribution is low near the entrance 11 and at the exit point 13 ^
Shows a good tendency. Therefore, if a constant air volume such as 15 is given by controlling the air volume p4 control valve based on the DO value near the inlet 1], there will be more air than necessary near the outlet 13, resulting in an over-air condition. This means that the blower will be supplying wasted air, which will result in wasted power consumption.In addition, from the standpoint of maintenance and safety, installing the sDo meter itself depends on the situation. This would result in excessive investment, which would be a problem, so as mentioned above, control is carried out using representative cypress trees. In addition, the position of DO@13 is set to 1211 in the center of the aeration tank 1.
Even if there is wrinkles near the exit 13, will Fib over-aerated areas occur since air is supplied to the entire aeration 1111?
[Purpose of 96ψ] The present invention is designed to reduce the power value of the blower for each of the C1 pumps. Insert several diffuser pipes in the cross direction of the cypress and make the entrance.

Since the inflowing sewage comes into contact with the activated sludge at each part of the exhalation tank, such as the opening and the outlet, the air volume is essential! The aim is to provide a device that can supply a large amount of food at once.

[A compliment of invention]

The present invention provides an aeration system consisting of a tank eave that divides inflowing sewage, aerates it, and discharges it as treated water, and a blower that blows air into these sewage groups at once. an aeration pipe that is installed in a direction that deviates from X, that is, in a direction that crosses the inflowing sewage, and diffuses air into each air tank group; - an arbitrary aeration 411I in the air tank group; What is the C binary value of this Do meter? This is an all-in-one device equipped with the above-mentioned air diffuser C and an opening force of 1 and 1 in order to reduce the amount of air flow included in the SS horizontal machine by v4.

Since the present invention u has 62 air tanks like the AO system, several air diffuser pipes are installed in the transverse direction of each air tank, and the inlet and center are installed.

Capture the DO of each part of the aeration tank, such as the outlet, and
2. By adjusting the air supply, the energy saving of the blower can be achieved.

[6th Embodiment] Next, FIG. 5 shows an embodiment of the present invention. Figure 5 d The inflowing sewage 8 is divided and discharged at once as treated water 9 from the tank group 1a to If and %-aeration tank ar: 1. In the all-at-a-time device consisting of: - a direction penetrating the air tank groups 1a to IF, and a direction crossing the inflowing sewage 8;
Diffusion pipes 6a to 6c that diffuse air to 1f and 411 at once
In order to adjust the ventilation lid of ventilation + 11R2 according to the values of DO shochu resistance a to 3c and DO needles 3a to 3 @ 0 needles, which are set in the air 1a to 6f, air diffuser t6a to t6a to t6a It shows an aeration device equipped with 60 & 11 - joint valve 7 opening force j 17°.

Figure 3 5 - #Side C of aeration tank l as shown: Sewage is 11.9 center 812 near the inlet. However, as shown in Figure 4, the distribution of the 108 people's sewage in this aeration tank has a tendency to be low near the inlet 11 and low near the exit 13, and the situation is distorted. Press as 1114.

Therefore, a large amount of air is required near the entrance 11, and a small amount of air is required near the exit 13.

Therefore, the air for the aeration tank is 11 near the inlet as shown by curve 1b.
Well then, if we supply a small amount near the exit 13.

There will be no waste of air.

This time, the 5th evil (as shown in 2% each - 11 near the entrance of Qiken)
Each aeration tube 6a extends in the transverse direction, each of the 22 in the center of each aeration tank, m#T7 + aeration pipe 6b that advances in the same way, and each of the 13 near the outlet of each aeration tank is C''-pervasive air diffuser 'Ir6c and air diffuser 6a.

6b, 6c inlet C, each wind iix valve opening force, 7
b, produce 7a.

Now, as shown in Figure 6, the D
The sDo value is detected by the O needle 3al2, and the Do control m, s
21a r Two people work together. D Ofill 11415
In 21m, so-called P control is performed by comparing the DO value set in advance from DO wax determination 11s23a with the process value determined in DO13m, and the operation output is & amount control tits 22a C output Above, from here, open valve 7a of Kik'04 valve 7a, all at once 1111a
Adjust the supply amount of air that enters from 1 fC to the target Do
Realize the value.

Hereinafter, 11i 2 Chuo 912. Adjust D6 at 13 near sunrise.

By doing this, - near the inlet of the air tank 11;

Central 11112. It is possible to divert the supply air based on each Dot 2 near the exit 13, which can be expected to save labor and energy.

In addition, in the above explanation, the aeration w is divided into three parts: entrance, center, and exit.
Although I am making a lot of money, it is inevitable that I will be able to manage this number of books.

As described above, in the system for controlling the air volume at a time in a sewage treatment plant according to the present invention, each direction of air flow is determined by the air diffuser pipe. To provide a method for controlling air flow, which is characterized by providing a plurality of wires, controlling the DO needle in multiple directions, and controlling the DO value of each cypress part to the 1 DO value. I can do it.

[Brief explanation of the drawing]

Figure 1 is a diagram showing the relationship between Do-ku-xia and a constant air flow rate, while Figure 3 shows the structure of the tank. Explanation-1 Figure 4 is an explanatory diagram showing the complex of FiDO concentration and the required air volume. Figure 5 is an explanatory diagram showing an embodiment of the present invention.
The figure is a 1i12 diagram showing control of air volume and valve opening based on the no value C2. 1... Air tank 2... Blower 5... Outflow waterway 6... Diffusion pipe 7... Kodo - Opening force
8... Sewage 9... Treated water 11... Near the inlet 12... Center s13... Near the exit 2l-I) OIIJii1 section 22... Air volume control section 23... DOW & foot section

Claims (1)

[Claims] In the wrinkles, there is a method for dividing inflowing sewage, aerating it, and discharging it as treated water, and a method for supplying air for aeration to these aeration tanks. . In the direction of the negative dam, the inflow water is crossed once and the aeration pipe is installed in each air tank 1N section to diffuse the air into the other groups. ff: The dissolution of #G#II Mokukei and #! Total of 11
珈++ (a one-shot device 0 equipped with a 凰ii control valve attached to the aeration pipe to adjust the amount of air blown by the blower depending on the area)