JPH022630B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to the operation and control of a plurality of ozone generators.

[Technical background]

There is a tendency to use ozone's oxidizing, sterilizing, and decolorizing and deodorizing effects for human waste treatment, sewage treatment, industrial wastewater treatment, etc., and these treatment plants have tended to become larger in recent years, resulting in ozone generation. The amount of ozone generated by machines is also increasing.

There are limits to increasing the amount of ozone generated by one ozone generator due to construction, economical, and handling considerations, and it is recommended to install multiple ozone generators to meet the required large amount of ozone. Be realistic.

The conventional method for controlling multiple ozone generators is to specify one adjustable ozone generator and control the remaining ozone generators as non-adjustable as follows.The conventional method is explained with reference to Fig. 1. do.

Amount of ozone generated by the adjustable ozone generator 11a
In order to detect _Y
A multiplication calculator 3 is provided to calculate the product of , and output the generated ozone amount Y=(C×F). Since the ozone amounts y ₁ , y ₂ , y ₃ generated from the non-adjustable ozone generators 11b, 11c, and 11d are fixed amounts, the respective operation signals (on/off signals) a,
Through the scalers y ₁ , y ₂ , y ₃ that set the respective fixed generation amounts from b and c, the ozone amount Y is inputted to the adder 4 along with the ozone amount Y generated by the adjustable ozone generator, and the total amount of ozone generated Yo is calculated. Output.

The ozone generation controller 13 uses the required ozone generation amount signal f given from the outside as a set value, and uses the output Yo of the adder 4 as a feedback value to the ozone generator controller 14 specific to the ozone generator 11a, which can be adjusted according to the deviation thereof. Issue control commands. For example, when ozone is injected into the ozonated water layer 5 through the aeration pipe 11, the signal f given from the outside is determined by measuring the amount of water 9 flowing into the treated water layer 5 with the flowmeter 6 and adjusting the flow rate of the water with the ratio controller 8. The amount of ozone proportional to is given as a signal f. Here, 7 is the ratio setting value and 10 is the water outlet of the water tank.

The ozone generator controller 14 is an ozone generation controller 1
The amount of ozone generated by the adjustable ozone generator 11a is controlled based on the command from No. 3. The amount of ozone generated can be easily controlled by controlling the voltage or frequency applied to the generator, or both.

At this time, if the adjustable ozone generator 11a is in the maximum load state and the command from the ozone controller 13 is a command to increase the amount of ozone generated, the ozone generator controller 14 controls the non-adjustable ozone generator 11a.
An additional operation command for one unit is issued to the operation control circuits 15 of units b, 11c, and 11d. Conversely, if the adjustable ozone generator 11a is in the minimum load state and the command from the ozone controller 13 is a command to decrease the amount of ozone generated, the ozone generator controller 14 will control the non-adjustable ozone generator. A command to stop one unit is issued to the operation control circuits 15 of 11b, 11c, and 11d. The operation control circuit 15 operates the ozone generators 11a, 11b, 11 which cannot be adjusted by the signal from the ozone generator controller 14.
Issues an operation stop command to c.

On the other hand, since the raw material gas (usually extremely dry air is used) supplied to the ozone generator is evenly distributed from the air source device 12 to multiple ozone generators, the non-adjustable ozone generator 11n is The air flow rate to the adjustable ozone generator 11 is the same and the power load is different.

As a characteristic of an ozone generator, the smaller the ratio W/Q of the air flow rate (Q) to the power load (W), the better the power efficiency, and FIG. 2 shows an example of this relationship.
Curve A is when P=760torr, curve B is when P=
Indicates 1790torr. Just because the smaller the ratio W/Q is, the better the efficiency, if the air flow rate is made too large,
Ozone concentration becomes low. Since a certain level of ozone concentration in the gas is required for the ozone reaction in the water treatment layer 5 to take place effectively, it is necessary to ensure that W/Q is a predetermined value. However, in the conventional method, as mentioned above, the ozone generator 1
W/Q is different between ozone generator 11n and ozone generator 11, and W/Q of ozone generator 11n is different from ozone generator 11.
It is clear that the overall power efficiency is worse than when the ratio W/Q of all ozone generators is equal. Conventional control of multiple ozone generators lacks consideration in this regard.

[Purpose of the invention]

The present invention solves the problems associated with the conventional plurality of ozone generators and provides an efficient ozone generator.

[Summary of the invention]

The present invention includes a flowmeter that measures the flow rate of a processed material;
A ratio controller that outputs the required amount of ozone generation based on the output signal of this flowmeter and the output signal from a preset ratio setting device, multiple ozone generators connected in parallel, and these ozone generators. ozone gas flowmeters each connected in series to the generator to measure the flow rate of the generated ozone; an ozone concentration meter connected in series to these ozone gas flowmeters and the ozone generator to measure the concentration of the generated ozone; A multiplier that multiplies the output signal of the ozone concentration meter and the output signal of the ozone gas flow meter, and an ozone generation amount controller that adjusts the amount of ozone generated depending on the output signal of the multiplier and the output signal of the ratio controller. and an ozone generator controller that controls the ozone generator based on the output signal of the ozone generation amount controller, in which the output signal of the ratio controller is divided by the ozone generation amount per unit. This ozone generator is equipped with an operating number selection device that determines the number of operating ozone generators and sends an output signal to an ozone generator controller.

That is, the present invention is a system in which ozone is generated by a plurality of ozone generators and a material to be treated is treated with the ozone. Determine the number of ozone generators to operate by dividing by the minimum amount, and operate the required number of ozone generators in a preset order.Meanwhile, calculate the total ozone gas flow rate at the outlet of each ozone generator and the output of each ozone generator. The total ozone generation amount obtained by multiplying the ozone concentration in the gas after the ozone gas is collected is compared with the required ozone generation amount, and a control signal is sent to each ozone generator so that the difference becomes zero. This ozone generator is characterized in that the amount of ozone generated is controlled by applying the ozone to the controller.

Since the present invention is configured as described above, it has the effect of improving the poor power efficiency in the conventional method of controlling a plurality of ozone generators, and making it possible to control the ozone generators with high efficiency.

[Embodiments of the invention]

Next, examples of the present invention will be described. FIG. 3 shows a flowmeter 6 that measures the flow rate of the material to be treated, and a ratio that outputs the required ozone generation amount f based on the output signal 6a of the flowmeter 6 and the output signal 7a from a preset ratio setting device 7. A controller 8 and a plurality of ozone generators 11a, 11b...11n connected in parallel to each other.
, ozone gas flowmeters 2a, 2b...2n connected in series to measure the flow rate of ozone generated, ozone gas flowmeters 2a, 2b...2n and ozone generators 11a, 11b... an ozone concentration meter 1 connected in series to 11n for measuring the concentration of generated ozone;
A multiplier 3 that multiplies the output signal C' of the ozone concentration meter 1 and the output signals of the ozone gas flow meters 2a, 2b...2n, and the output signal Yo' of the multiplier 3 and the output signal f of the ratio controller 8. ozone generation amount controller 13 that adjusts the amount of ozone generation, and ozone generator controllers 14a, 14b...14n that control the ozone generators 11a, 11b...11n based on the output signal 13a of the ozone generation amount controller 13. In the ozone generator, the number of operating ozone generators is determined by dividing the output signal f of the ratio controller 8 by the amount of ozone generated per unit, and the ozone generator controller 14
This shows an ozone generator equipped with an operating number selection device 17 that sends output signals to terminals a, 14b, . . . , 14n.

In FIG. 3, a flow meter 2a is provided at the outlet of the adjustable ozone generator 11, and an ozone concentration meter 1 is provided in the pipe where ozone gas is collected. Each flow meter 2a,
Based on the output signal Fa of the totalizer 16 that totals 2b...2n and the output signal C' of the ozone concentration meter 1
A multiplication calculator 3 is provided for calculating F'×C'. On the other hand, the output signal f of the ratio controller 8 is sent to the operation number selection device 17 by the flow meter 6 for treated water and the ratio setting device 7.
At the same time, it is also supplied to the ozone generation amount controller 13. The ozone generator controllers 14a, 14b...14n of the ozone generators 11a, 11b...11n receive the signal 17a from the operating number selection device 17 and operate the necessary ozone generators and control the output signal 13a from the ozone generation amount controller 13. Then, the ozone generator is controlled.

The output signals of the flowmeters 2a, 2b, . hand
The calculation C′×F′ is performed, and the resulting signal Yo′ is provided to the ozone generation amount controller 13. The ozone generation amount controller 13 compares and calculates the output signal f of the ratio controller 8, which receives the signal from the flow meter 6 that measures the amount of water flowing into the ozone treatment water tank, with the set value and the signal Yo' as a feedback value. The controllers 14a, 14b...1 of the ozone generator output increase/decrease signals such that the difference becomes zero.
4n, and the controller uses this signal to increase or decrease the voltage or frequency applied to the ozone generator or the voltage and frequency.

On the other hand, the operating number selection device 17 that receives the output signal f of the ratio controller 8 divides the output signal f, that is, the required ozone amount by the preset minimum load amount per ozone generator, and selects the number of ozone generators. The number of units in operation is calculated, and an operation or stop command is issued to the ozone generator controller 14 in a preset order. The ozone generator controller 14 receives the command and controls the operation or stop of the corresponding ozone generator, and
During operation, the output signal from the ozone generation amount controller 13 is received to control the voltage or frequency applied to the corresponding ozone generator, or the voltage and frequency. The motor-driven valve that opens and closes the air supplied to the ozone generator is turned on and off in conjunction with the operation or stop designation.
It is natural to do so.

When the calculation result of the operating number selection device 17 is greater than the number n of ozone generators installed, naturally the number of operating units is n and the amount of ozone generated is automatically increased by the controller 13 by adjusting the load of each ozone generator. It will be covered by this. In addition, the operating number selection device 17
If the calculation result in is one or less, a correction is made to keep the number of operating vehicles at one.

In the above explanation, the external signal given to the ozone controller was an example of an ozone injection amount proportional to the amount of treated water. There is no problem. In addition, a flow meter 2 was installed at the outlet of each ozone generator, but this is provided to check whether the air flow rate distributed to each ozone generator is equal, so that it is evenly distributed. When it is clear, just one flowmeter 2 needs to be installed in the collection pipe like the ozone concentration meter 1. In this case, the totalizer 16 is not necessary and the signal F' from the totalizer to the multiplier 3 is directly collected. The signal from the flowmeter 2 can be used instead.

[Brief explanation of drawings]

Fig. 1 is a configuration diagram of a plurality of conventional ozone generators, Fig. 2 is a characteristic diagram showing the relationship between the air volume of the ozone generator, the ratio of supplied power, and the ozone generation efficiency, and Fig. 3 is a diagram of one of the ozone generators according to the present invention. BRIEF DESCRIPTION OF THE DRAWINGS It is a block diagram of the ozone generator which shows an Example. 1... Ozone concentration meter, 2... Ozone gas flow meter, 3... Multiplier, 4... Adder, 5... Ozone treatment water tank, 6... Flow meter, 7... Ratio setting device, 8... Ratio controller, 11...Ozone generator,
12... Air source device, 13... Ozone generation amount controller, 14... Ozone generator controller, 15... Ozone generator operation control circuit, 16... Totalizer, 17... Operation number selection device.

Claims (1)

[Claims] 1. A flow meter that measures the flow rate of the material to be treated and a ratio controller that outputs the required amount of ozone generation based on the output signal of this flow meter and the output signal from a preset ratio setting device are connected in parallel to each other. a plurality of ozone generators, an ozone gas flowmeter connected in series to each of these ozone generators to measure the flow rate of generated ozone, and an ozone gas flowmeter connected in series to these ozone gas flowmeters and the ozone generator. an ozone concentration meter that measures the concentration of ozone generated by the ozone concentration meter; a multiplier that multiplies the output signal of the ozone concentration meter and the output signal of the ozone gas flowmeter; and the output signal of the multiplier and the ratio controller. An ozone generator comprising an ozone generation amount controller that adjusts the amount of ozone generation based on an output signal, and an ozone generator controller that controls the ozone generator based on the output signal of the ozone generation amount controller. ,
An ozone generator comprising an operating number selection device which determines the number of operating ozone generators by dividing the output signal of the ratio controller by the amount of ozone generated per unit and sends an output signal to the ozone generator controller. .