JPH08267030A - Method for washing pipe interior by forcibly feeding ozone and device therefor - Google Patents

Abstract

PURPOSE: To improve the washing effect of a water feed/drain pipe by forcibly feeding ozone into a water feed pipe to fill it with ozone while its concentration is controlled, opening a valve on the water feed side after a prescribed time to start the water feed, and increasing ozone pressure in the water feed pipe to distribute it into every nook and corner of the water feed pipe. CONSTITUTION: When washing a water feed pipe, first a valve on the water feed side is closed and a valve on the water drain side is opened to discharge water in the water feed pipe. Next, ozone in an ozonizer 5 is forcibly fed into the pipe to fill it with ozone gas while its concentration is controlled, and it is confirmed by an ozone monitor whether ozone reaches the termination of the pipe or not. Then, the valve on the water drain pipe is closed and ozone is further injected for several minutes to improve oxidation and sterilization of iron, bacteria and the like. After a prescribed time, the valve of the water feed side is opened to start the water feed and raise ozone pressure in the pipe. When iron, bacteria and the like are oxidized and decomposed, after the valve on the water drain side is opened to start regular water feed and drive out reddish water in the pipe, the pipe interior is washed with water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe cleaning method and apparatus by ozone pressure feeding.

[0002]

2. Description of the Related Art Various methods are known for cleaning water supply and distribution pipes using ozone water.

[0003]

[Problems to be Solved by the Invention] Conventionally, treatment of surplus ozone that cannot be completely dissolved when ozone water is generated, quantitative control of the concentration of ozone contained in water, and ozone water at a flow rate such that oxidation in a pipe can be sufficiently performed. Sufficient techniques have not been established in terms of in-tube injection.

[0004]

In order to solve the above problems, the present invention is a method for cleaning the inside of a water supply pipe, in which the water supply side valve of the water supply pipe is closed and the drainage side valve is opened. The step of discharging the internal water, the step of pumping ozone into the water supply pipe while controlling the concentration, and the step of confirming that the water supply pipe is completely filled with ozone using the ozone monitor attached to the drain valve. Then, after the drain side valve is closed, ozone is further sent for a predetermined period of time, a step of moving the ozone monitor during this ozone feeding step to check for ozone leakage, and oxidation of iron bacteria etc. by ozone, After the time when it can be estimated that the sterilization is completed, the valve on the water supply side is opened to start water supply, and the ozone pressure in the water supply pipe is increased to distribute ozone to every corner of the water supply pipe. There is provided a method comprising the step of performing injection by opening the drainage side valve and the water supply side valve after oxidative decomposition, the tube cleaning.

The invention further provides an apparatus for carrying out the above method.

[0006]

The present invention will be described in detail below with reference to the accompanying drawings.

Referring to the drawings, the present invention is shown here in relation to the "spherical cyclone having an ozonizer" disclosed in the applicant's prior application (Utility Model Registration Application No. 89369 of 1988). is there. In the present application, ozone is generated by the "spherical cyclone having an ozonizer" and is used.

According to the present invention, first, the valve on the water supply side of the water supply pipe is closed and the valve on the drainage side is opened to discharge the water inside the water supply pipe. Then, using a curved ozonizer, pressure-fed ozone generated in the sphere while controlling its concentration,
Fill the inside of the piping system with ozone gas and check that ozone has reached the final pipe of the piping system you are trying to clean with the ozone monitor attached to the drain valve. Then, the drain side valve is closed, and ozone is further injected for several minutes to accelerate the oxidation and sterilization of iron bacteria and the like. In the meantime, check the ozone monitor or detector tube for ozone leaks from the pinholes of the piping. This helps prevent water leakage.

After a certain period of time, the valve on the drain side is closed and water is supplied to increase the ozone pressure in the pipe. When the ozone has been oxidized and decomposed for about 1 hour, the valve on the drain side is opened to open it. Water supply is started to expel the red water in the pipe, and the pipe is washed with water to complete the washing.

When the pipes are old and cannot be cleaned at once, the above procedure is repeated to confirm that the oxide film due to ozone is surely formed, and then the work is completed.

The pipe cleaning method according to the present invention is shown in the chart below for reference.

[0012]

[Table 1]

[0013]

According to the present invention, the inside of the water supply / distribution pipe can be reliably cleaned with ozone.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing the present invention. 1 ... Cyclone body 1a ... Cyclone upper part 1b ... Cyclone lower part 1c ... Flange part (upper part) 1d ... Flange part (lower part) 2 ... Introducing pipe (processing fluid) 3・ ・ ・ Outlet pipe 4 ・ ・ ・ Exhaust pipe 5 ・ ・ ・ Ozonizer 6 ・ ・ ・ Diffusion means 7 ・ ・ ・ Inlet port (oxygen or clean air) 8 ・ ・ ・ Valve

Claims (2)

[Claims] 1. A method for cleaning the inside of a water supply pipe, comprising:
Close the valve on the water supply side of the water supply pipe and open the valve on the drainage side to discharge the water inside the water supply pipe, to pump ozone into the water supply pipe while controlling the concentration, and to attach it to the drainage side valve. And a step of confirming that the water supply pipe is completely filled with ozone, and a step of further feeding ozone for a predetermined period after closing the drain valve.
During this ozone feeding stage, the ozone monitor is moved to check for ozone leaks, and after a time when it is estimated that the oxidation and sterilization of iron bacteria, etc. by ozone has been completed, the valve on the water supply side is opened to supply water. From the stage of starting and increasing the ozone pressure in the water supply pipe to distribute ozone to every corner of the water supply pipe, and the stage of performing water injection and pipe cleaning by opening the drainage side valve and the water supply side valve after oxidative decomposition of ozone. How to become. 2. An apparatus for carrying out the method of claim 1.