JPH07222986A - Apparatus for removing moisture in duct for sampling - Google Patents

Abstract

PURPOSE:To control correctly ozone injection by removing moisture from exhaust gas containing waste ozone and moisture to reduce the self- decomposition of ozone and preventing the failure of suction caused by water deposit in a duct for sampling. CONSTITUTION:In a water treatment apparatus using ozone in which one end of a duct 1b for sampling is connected with an exhaust duct 1a for exhaust gas containing waste ozone and moisture in a reactor 1, exhaust gas is introduced from one end of the duct lb, and the concentration of unreacted ozone is measured at the other end, a part of one end of the duct 1b is directed to the position above the joint of the exhaust duct 1a in the piping, and a cooler is installed on the periphery of the duct 1b.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sampling pipe provided for measuring the concentration of exhaust ozone used in plants such as advanced treatment of sewage and sewage and industrial wastewater treatment. The present invention relates to a device for removing water in a pipeline.

[0002]

2. Description of the Related Art Conventionally, in plants for advanced treatment of sewage and sewage, industrial wastewater treatment, etc., organic substances in the water to be treated are introduced by injecting ozone into the untreated water introduced into the reaction tank. Are removed and deodorized.

As shown in FIG. 3, a water treatment apparatus adopting this method has a reaction tank 11 provided in a pipe system of water to be treated A, and ozone is injected into the reaction tank 11 with a falling gas. A diffusing tube 12 disposed at the bottom of the reaction tank 11 for
The means for introducing the ozone generated by the ozone generator 13 into the air diffuser 12 by the blower 14 and the like, and the upper portion of the reaction tank 11 for introducing the exhaust ozone exhausted from the reaction tank 11 into the processing device 15 are provided. It is composed of the exhaust duct 11a and the like.

In the above apparatus configuration, the water to be treated A is supplied to the reaction tank 11 from a storage device (not shown) such as an external tank by a pump or the like, and at the same time, ozone generated by the ozone generator 13 is generated. Through the flow meter (not shown) and the like, and is diffused into the reaction tank 11 by the air diffuser 12 and diffused to react with the water A to be treated. At this time, the unreacted waste ozone is removed from the reaction tank 1.
1 is exhausted from the exhaust duct 11a at the upper part and is introduced into the processing device 15 to be decomposed.

By the way, in this type of water treatment apparatus, it is necessary to control the production amount of ozone injected into the reaction tank 11. Therefore, in general, the sampling duct 11b is branched to the exhaust duct 11a. The exhaust ozone concentration is measured by the concentration measuring device 17 arranged at the end of the conduit 11b, and this measured value is fed back to the ozone generator 13 to control the amount of ozone produced.

[0006]

Therefore, in the above control method, in order to control the production amount of ozone injected into the reaction tank 11 more accurately, it is necessary to control the amount of ozone injected from the water A to be treated. Although the measured value of ozone is required, the exhaust gas released from the water A to be treated contains not only the exhaust ozone but also a large amount of water, and this is the exhaust duct 11a.
Therefore, there is a problem that it is not possible to obtain an accurate measurement value by promoting self-decomposition of ozone passing through the conduit 11b.

Further, in the above structure, the exhaust ozone is guided into the sampling conduit 11b by the suction of the pump 18, but the waste ozone can be sucked from the conduit 11b into the concentration measuring instrument 17 by the water pool. There were also problems such as disappearance.

[0008]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and directs a part of one end of a sampling pipe to a position higher than a connecting portion with an exhaust duct. The cooling device is attached to the outer peripheral portion of the pipe line that is piped toward the upper side so that the moisture sucked together with the exhaust ozone can be condensed and returned to the exhaust duct. .

[0009]

OBJECTS OF THE INVENTION As described above, the object of the present invention is to remove water from exhaust gas in which waste ozone and water coexist, reduce self-decomposition of ozone, and suction by a water pool in a sampling pipe. The purpose of this is to prevent the failure and, as a result, to enable more accurate control of the ozone injection amount.

[0010]

According to the structure of claim 1 of the present invention, one end of a sampling pipe is connected to an exhaust duct for exhausting exhaust gas containing exhaust ozone and water in a reaction tank. In the water treatment device using ozone, in which the exhaust gas is introduced from one end of the pipeline and the concentration of unreacted exhaust ozone is measured at the other end, a part of one end of the pipeline is exhausted. It is configured such that the pipe is piped upward from the connecting portion with the duct, and the cooling device is attached to the outer peripheral portion of the pipe line piped upward.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention which has achieved such an object will be described with reference to the drawings of the following embodiments.

FIG. 1 is an overall schematic view of a water treatment apparatus according to the present invention, FIG. 2 is a schematic view of essential parts for explaining a water removal apparatus in a pipeline of the present invention, and FIG. FIG. 3 is an overall schematic diagram of the water treatment device of FIG.

The present invention relates to a sampling pipe provided for measuring the concentration of exhaust gas such as ozone used in plants for advanced treatment of sewage and sewage, industrial wastewater treatment, etc. As shown in FIGS. 1 and 2, one end of a sampling pipe 1b is connected to an exhaust duct 1a for exhausting exhaust gas from the reaction tank 1, and In a water treatment apparatus using ozone, which introduces exhaust gas from one end of the conduit 1b and measures the concentration of unreacted exhaust ozone at the other end, exhausts a part of one end of the conduit 1b. The gist is that the cooling device 10 is attached to the outer peripheral portion of the conduit 1b that is piped toward the upper side of the connecting portion with the duct 1a.

That is, the water treatment apparatus according to the present invention removes organic substances and the like in the water A to be treated such as water and sewage, industrial waste water, etc., by injecting ozone into the water, and at the same time, performs deodorizing treatment. As shown in FIG. 1, a reaction tank 1 provided in the pipeline of the water A to be treated and a bottom portion of the reaction tank 1 for injecting ozone into the reaction tank 1 are installed. The diffuser pipe 2 and means for introducing the ozone generated by the ozone generator 3 into the diffuser pipe 2 by the blower 4 and the like, and the exhaust gas exhausted from the reaction tank 1 is introduced into the treatment device 5 by the exhaust fan 6. It is composed of an exhaust duct 1a and the like provided on the upper part of the reaction tank 1.

One end of a sampling conduit 1b is connected to the lower side of the exhaust duct 1a of the reaction tank 1,
At the other end of the conduit 1b, a concentration measuring device 7 equipped with an optical measuring means or the like for measuring the concentration of unreacted exhaust ozone,
A pump 8 and a processing device 9 are provided.

In the present invention, the sampling conduit 1b is used.
A part of one end of the pipe is piped upward from the connecting portion with the exhaust duct 1a, and the cooling device 10 is attached to the outer peripheral portion of the pipe 1b piped upward. It is a thing.

The cooling device 10 is, as shown in FIG.
A cooler equipped with a Peltier element or the like, which cools exhaust gas containing exhaust ozone and water flowing in the pipe 1b through the control valve 1c, and causes water in the exhaust gas to condense on the inner wall surface of the pipe 1b. This can be returned from the duct 1b into the exhaust duct 1a.

[0018]

In order to remove the organic substances and deodorize the treated water A by the water treatment apparatus of the present invention, the reaction tank 1 is treated with a pump or the like from a storage device (not shown) such as an external tank. Water A is supplied, and at the same time, ozone generated by the ozone generator 3 is actuated by the blower 4 and a gas is injected into the reaction tank 1 from the air diffuser 2 through a flow meter (not shown), etc. React A with ozone. At this time, the unreacted waste ozone is removed from the reaction tank 1.
The gas is discharged from the upper exhaust duct 1a into the processing device 5, is decomposed into a harmless gas by a decomposition reaction by a catalyst, etc., and is discharged into the atmosphere.

On the other hand, a part of the unreacted exhaust ozone before being introduced into the processing device 5 is introduced by the pump 8 into the sampling pipe 1b which is branched and connected to the exhaust duct 1a. Concentration measuring device 7 arranged at the end of the pipeline 1b
Thus, for example, the absorbance of exhaust ozone is measured. This measured value is equivalent to the excess or deficiency of the injection amount of ozone required for the reaction. Therefore, this measured value is equivalent to the ozone generator 3
To control the amount of ozone produced.

By the way, by injecting water vapor over time,
Since the water content of the water to be treated is mixed in the waste ozone as vapor, it becomes a hindrance to the measurement of the absorbance of the waste ozone by the concentration measuring device 7 and a hindrance during the suction in the conduit 1b. To do.

In the present invention, as a means for removing water, the cooling device 10 is attached to the outer peripheral portion of one end of the conduit 1b connected to the exhaust duct 1a, so that the cooling device 10 is started at the start of sampling. When activated, the water vapor mixed in the exhaust ozone reaches the cooling device 10 attached to the outer peripheral portion of the pipeline 1b and adheres to the inner wall of the pipeline 1b as water droplets.

In addition, since the pipeline 1b is piped in a direction obliquely upward from the exhaust duct 1a installed vertically as in the embodiment, for example, water droplets attached to the inner wall of the pipeline 1b are gravitated by gravity. It flows downward in the pipeline 1b to reach the exhaust duct 1a, and is further returned from the exhaust duct 1a to the reaction tank 1.

As a result, since the exhausted ozone from which water has been completely removed is smoothly introduced into the concentration measuring instrument 7 arranged at the other end of the sampling pipe 1b, accurate measurement is possible. Therefore, the production amount of ozone injected into the reaction tank 1 is controlled to an appropriate amount.

[0024]

According to the present invention, some of the one end of the sampling pipe is piped upward from the connection with the exhaust duct, and the pipe is piped upward. Since a cooling device was attached to the outer peripheral part of the, the moisture in the exhaust gas was condensed by operating the cooling device,
It can be returned to the exhaust duct. For this reason, water that promotes the self-decomposition of exhaust ozone is extremely effectively removed, so that the concentration of exhaust ozone can be measured accurately, and as a result, the amount of ozone injected into the reaction tank can be controlled more accurately. Therefore, energy saving operation becomes possible. Also,
This is an epoch-making and meaningful invention in which inability to suck exhaust gas is prevented because water is not accumulated in the sampling pipe.

[0025]

[Brief description of drawings]

FIG. 1 is an overall schematic diagram of a water treatment device according to the present invention.

FIG. 2 is a schematic view of a main part for explaining a water removing device in a pipeline according to the present invention.

FIG. 3 is an overall schematic diagram of a conventional water treatment device.

[0026]

[Explanation of symbols]

 A Treated water 1 Reaction tank 1a Exhaust duct 1b Pipe line 1c Control valve 2 Diffuser tube 3 Ozone generator 4 Blower 5 Treatment device 7 Concentration measuring device 6 Exhaust fan 8 Pump 9 Processing device 10 Cooling device 11 Reaction tank 11a Exhaust duct 12 Air diffuser 13 Ozone generator 14 Blower 15 Processing device 17 Concentration measuring device 18 Pump 19 Processing device

Claims (1)

[Claims] Claim: What is claimed is: 1. One end of a sampling pipe is connected to an exhaust duct for exhausting the exhaust gas in the reaction tank, and the exhaust gas is introduced from one end of the pipe while the other end is not connected. In an ozone-using water treatment device for measuring the concentration of exhaust ozone of a reaction, a part of one end of the pipe is piped upward from a connecting portion with an exhaust duct, and the pipe is moved upward. A water removing device in a sampling pipeline, wherein a cooling device is attached to an outer peripheral portion of the pipeline that is routed toward the sampling pipe.