JP2018155474A - System and method for completely removing dissolved oxygen from water in piping of boiler and air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem in which there is no specific method of completely removing dissolved oxygen from water in piping of a boiler or an air conditioner, which causes generation of scale, and there is no data to demonstrate the method; currently dependent on chemical cleaning or the like.SOLUTION: Generation of scale in water piping of a boiler and an air conditioner can be prevented by providing a specific method of completely removing dissolved oxygen from water, which causes generation of scale, and by establishing data for demonstration of the method.SELECTED DRAWING: Figure 1

Description

  The present invention relates to making the dissolved oxygen completely zero in water supplied to boilers and air conditioning equipment.

  In the pipe that supplies water to the boiler and vaporizes it, the corrosion of the pipe itself and impurities that enter along with the water supply adhere and multiply (hereinafter referred to as scale), which not only hinders the heat transfer of the boiler, but also the evaporation pipe It may cause accidents such as material deterioration, bulging, and rupture due to overheating.

  Therefore, under the present circumstances, chemicals such as organic acids are circulated in the boiler piping to clean the piping, but the cleaned chemicals must be discarded. Since the chemicals are detoxified so as not to cause environmental destruction, they are burdened with equipment, labor, cost, and energy.

  As described above, not only the boiler but also the piping of the air-conditioning equipment has a failure due to the influence of the scale.

  The generation factor of scale is dissolved oxygen contained in water. There are many techniques to reduce the dissolved oxygen, but if it is not completely reduced to zero, scale will be generated. Therefore, a patent for making dissolved oxygen zero is disclosed in the following document. Patent Document 1 describes a deoxygenation device that makes the dissolved oxygen concentration substantially zero, but does not describe a specific method or data for the process.

  Patent Document 2 also describes that the dissolved oxygen concentration is reduced to zero, but does not describe a specific method or data for the process.

JP 2009-158426 A Special table 2005-528111

  As described above, a specific method for completely eliminating dissolved oxygen contained in water as a factor for generating scale and data for demonstrating it have not been established. The current situation depends on chemical cleaning in the water pipes.

  In order to solve the above-mentioned problem, the invention as claimed in claim 1 is that, in the feed water that is vaporized by a boiler, a human body harmless gas is put into water contained in a required amount of the sealed tank at a pressure of 1.1 hpa, By opening the air vent valve of the tank, the dissolved oxygen of the water is released to the outside, and then by opening the water supply valve of the sealed tank, the water is sent to the water tank, and the dissolved oxygen meter in the water tank The water is returned to the sealed tank again until the dissolved oxygen is completely zero, and the water is dissolved oxygen in a cycle in which the harmless gas is injected at a pressure of 1.1 hpa to release the dissolved oxygen as described above. It is repeated until it becomes completely zero, and the boiler supply water characterized by preventing scale formation in the boiler water piping is zero.

  According to the second aspect of the present invention, in the water supplied to the piping of the air conditioning equipment, a human harmless gas is put into the water in the required amount of the sealed tank at a pressure of 1.1 hpa, and the air vent valve of the sealed tank is set. By opening the water, the dissolved oxygen is released to the outside, and then the water supply valve of the sealed tank is opened to send the water to the water tank, and the water is completely discharged by the dissolved oxygen meter in the water tank. The water is returned to the sealed tank again until the dissolved oxygen reaches zero, and as described above, a cycle in which the human harmless gas is introduced at a pressure of 1.1 hpa and the dissolved oxygen is released until the water becomes completely zero. Repeatedly, the supply of air to the air conditioning equipment, which is characterized by the prevention of scale formation in the water piping of the air conditioning equipment, is to make the water-soluble oxygen completely zero.

  According to the present invention, a specific method for completely eliminating dissolved oxygen contained in water as a factor for generating scale and data for demonstrating it are established. Scale generation in the water piping can be prevented.

It is a whole block diagram in the Example of this invention. It is a block diagram of the main body apparatus in the Example of this invention. It is a graph of a dissolved oxygen complete zero demonstration test of the present invention.

  Hereinafter, the present invention will be described with reference to examples. As shown in FIG. 1, the main unit 1 according to the present invention is installed between the water supply from the condenser indicated by the arrow 1 a and the boiler piping 2 a of the boiler 2. The water supplied from the arrow 1 a is converted into completely zero dissolved oxygen water in the main unit 1 and supplied to the boiler 2. Dissolved oxygen complete zero water is combusted in the boiler pipe 2a, and finally steam as dissolved oxygen complete zero water is discharged as shown by an arrow 2b.

Next, the process of generating the dissolved oxygen complete zero water in the main unit 1 will be described.
The water supplied from the arrow 1 a enters the water tank 3, and when the water 3 a reaches the required amount, the pump 3 c is operated and is put into the sealed tank 4. While the water 3a is being charged, the air vent valve 4a is open. Thereafter, the gas valve 5a is opened, and nitrogen gas is fed into the sealed tank 4 from the nitrogen cylinder 5 at a pressure of 1.1 hpa. In addition, although nitrogen gas was specified here as an example, any gas may be used as long as it is harmless to the human body. Further, the nitrogen gas is adjusted by a throttle valve built in the gas valve 5a in order to keep the pressure of 1.1 hpa constant.

  After feeding nitrogen gas for a certain period of time, the air vent valve 4a is opened to release dissolved oxygen to the outside, and the water in the sealed tank 4 is changed to zero dissolved oxygen water 4b. Thereafter, the supply valve 4 c is opened and charged into the water tank 3. Therefore, if even a small amount of dissolved oxygen remains by the dissolved oxygen meter 6, the pump 3c is operated and sent again to the sealed tank 4 to be filled with nitrogen gas. This cycle is continued until the water in the water tank 3 is completely zero dissolved oxygen. When the water in the water tank 3 is completely dissolved oxygen zero water, the release valve 3b is opened and the dissolved oxygen completely zero water is supplied to the boiler 2 as indicated by an arrow 7.

  FIG. 3 shows demonstration test data obtained by making a prototype of the main unit 1 described above and measuring the dissolved oxygen concentration of water in time series with a dissolved oxygen meter. As shown in the figure, the amount of dissolved oxygen contained in the water is completely zero after 60 minutes.

  By making ice with completely zero dissolved oxygen, it is possible to provide fresh seafood to the market.

DESCRIPTION OF SYMBOLS 1 Main body apparatus 1a Arrow 2 Boiler 2a Boiler piping 2b Steam 3 Water tank 3a Water 3b Release valve 3c Pump 4 Sealed tank 4a Air vent valve 4b Dissolved oxygen zero water 4c Supply valve 5 Nitrogen cylinder 5a Gas valve 6 Dissolved oxygen meter 7 Arrow

Claims (2)

  In the feed water vaporized by the boiler, the human body's harmless gas is put into the water in the required amount of the sealed tank at a pressure of 1.1 hpa, and the dissolved oxygen of the water is released by opening the air vent valve of the sealed tank. The water is discharged to the outside, and then the water discharge valve of the sealed tank is opened, so that the water is sent to the water tank. Is returned to the closed tank, and the cycle of injecting harmless human body gas at a pressure of 1.1 hpa and releasing dissolved oxygen as described above is repeated until the water reaches zero, and scale generation in the water piping of the boiler occurs. Boiler-fed system characterized by prevention and system for zeroing water-existing oxygen.   In the water supplied to the piping of air conditioning equipment, the human body's harmless gas is put into the required amount of water in the sealed tank at a pressure of 1.1 hpa, and the air is released from the closed tank by opening the air vent valve. Then, the water is sent to the water tank by opening the water discharge valve of the sealed tank, and the dissolved oxygen meter in the water tank is used until the dissolved oxygen is completely zero. Return the water to the sealed tank again, and repeat the cycle of injecting harmless human body gas at the pressure of 1.1 hpa and releasing the dissolved oxygen as described above until the water reaches zero completely, System for cooling and heating equipment supply characterized by prevention of scale generation and a method for completely eliminating water-soluble oxygen.

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