JPS58189093A - Treatment of aqueous hydrazine - Google Patents

Abstract

PURPOSE:To easily and certainly decompose hydrazine contained in the water inside a pipe, by injecting hydrogen peroxide into hydrazine-contg. water in the pipe for a power-generating plant using a steam turbine or the like, and circulating the water by a pump. CONSTITUTION:A pump 2 is provided in pipe 1, and a catalyst means 7 using powdery ion-exchange resin as a catalytic filter is provided at the downstream side. A tank 3a for hydrogen peroxide is connected to the upper stream side of the pump 2 in a manner such that hydrogen peroxide 3 received in said tank 3a can be injected through a switch valve 3b and a pump 5 into the pipe 1. By circulating the mixed liquid through the pipe 1 with the pump 2, hydrazine is sufficiently mixed and reacted with hydrogen peroxide to decompose it into nitrogen gas and water. Thus, the treatment of hydrazine is very easy, and hydrazine is rapidly and certainly decomposed by the action of the catalyst since the mixed liquid is let flow through the catalyst means.

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical minute hand of 1m size) The present invention 1jQt;l Corrosion prevention of piping 62 Other methods of preventing water from being used in piping.

[Chapter “The Art of Invention”]

Periodic inspections of nuclear power equipment are normally required to be carried out every three months. During this time, the water in the pipes of the Soshi reactor water supply system and condensate system became watery, wrinkled, and rusted inside the pipes. This rust U atoms are carried into the reactor in many wrinkles when F is restarted.

The award-winning -Fi brought into the reactor is activated in the reactor, leading to an increase in the radiated IiI electricity in each tank of the reactor, and increasing the fuel saturation and impairing the heat transfer of the fuel. Ta.

Therefore, one method to avoid the above-mentioned problems is to inject hydrazine into the water supply system and condensate system when the reactor is shut down, remove the remaining #wood, and improve the anti-corrosion effect. I thought about it.

[Background technology between listening points]

However, if hydrazine is not completely removed before starting up outside the reactor, hydrazine will be activated when the reactor is restarted, increasing the plant's radiation output. Therefore, it is conceivable to drain the water and use the radioactive tumor disposal system to escape, but since the water is only sporadic, it is necessary to drain the water for plant re-defecation during the heating process. Because of the steamed water, it was difficult to dispose of it with radioactive waste I and lint.

Furthermore, in plants using steam turbines, such as C forks and thermal power plants, there is a problem in that nihydride adheres to the inside of the boiler and impairs heat transfer.

[From BAO II] The purpose of this book is to provide 11 methods for disposing of hydrazine water that easily and reliably decomposes the hydrazine contained in the water in the pipes of plants using steam turbines.

[Invention O summary]

In the present invention 62, hydrogen peroxide is injected into the hydrazine water in the piping and pumped with a pump.

The reaction between hydrazine and aqueous peroxide has a good effect, and it decomposes hydrazine easily and reliably.

[Yao v4o implementation example] Implementation? ! i1 Hereinafter, two examples of fiber 11fA of the present invention will be explained with reference to FIG. 1.

Piping (1) has a built-in pump (
j) is provided, and downstream thereof, a contact device (7) using ion exchange resin powder as a catalyst filter material is provided.
And the top 1 of the above-mentioned pump Yu is Super Enemy Hydrogen Jo (36)
Inside 6: Insert the nine-pass enemy water main (8) and the opening/closing valve (3i) and the peroxide water aS feed button (through the pipe (1) inside 1; connect it so that it will flow automatically by injection ◎Also %lbJ Xu g two said pump (z
) is connected to the hydrazine solution (4) placed in the human 2 gin stock solution tank (4,) in the piping (1) via the on-off valve (4b) and the human 2 gin stock solution tank supply pump (6). Connect so that 6 units can be injected.

In this 1, piping 1 (
1) Inject hydrazine (-) into the inner O water to prevent rust from forming inside the pipe. When the plant starts operating, hydrazine water C2A hydrogen oxide (3) is injected into the pipe, the pump (1) is operated, and the mixed liquid is circulated in the pipe (2).

Next, we will explain the action: When the mixed liquid is circulated in the pipe (1) using a pump,
Hydrazine and hydrogen peroxide are well mixed and the following reaction occurs easily and reliably.

M@Ti4 + 1lol -+ 11↑+! ag.

That is, from this reaction, hydrazine NIH No. F1 reacts with neofu and decomposes into 1 g of gas Ml↑ and water HIO.

Since the products produced by the reaction with the sensitizing hydrogen are water and nitrogen, which is an atmospheric component, treatment of hydrazine is extremely simple and easy. Moreover, since the mixed liquid L ion exchange resin powder is passed through a catalyst having a filter medium, hydrazine is rapidly and reliably decomposed by the action of the catalyst.

The 20th embodiment will now be described with reference to Figure 8. This is #i waste treatment salt system piping (2) (see Figure 1)
This is the case if you put Dorazine water into the container.

This Fi, m liquid transfer line (8) [7 to receive tank (9,) +: hydrazine water (o + to receive 6
Then, this hydrazine water (9) is returned from the tank (ea) to the original tank (9,) via the transfer pump (g) to the closed 9F (b) and the line-built tanker 4 to the DM wharf. #tIIi on line kina (2)
! Hydrogen peroxide (8) in a peroxidized hydrogen cypress (36) is injected into the tank via a ridged water main transfer pump (6). The ring is a valve used to send the decomposed waste liquid to the next step.

In this way, the upper tJl of line construction kina (9)
The supercharged Mizuki Fi injected into T and N is mixed in the line construction mixer, and is strongly linked in the transfer bonder.
The hydrazine in the hydrazine water in the tank (9,) can be easily decomposed.

[Effects of #4] As explained above, hydrogen peroxide is added to the same amount of human water in the piping or into the tank. By injecting hydrazine and circulating it with a pump, we can provide a method for treating hydrazine water that allows a good reaction between hydrazine and sensitized hydrogen and easily decomposes hydrazine.

[Brief explanation of drawings]

Figure 8181 and Figure 2 are the r of Example 10 and Example 2 of Fuji 2, which carry out the method for treating hydrazine water of the present invention.
It is a thread drawing of lkll. l-・Piping 2 pumps 3-・Hydrogen peroxide 4-hydrogen*17-catalyst*
9＠-Tank l-row transfer pump representative Patent attorney Inoue -Male

Claims (1)

[Claims] (1) A method for treating hydrazine water that decomposes hydrazine contained in water in a power distribution system, which includes injecting a volume of superdensified water into hydrazine water and circulating it with a pump. 1l
Hydofusin water O salt treatment method as iilk. (2) Hydrazine water is water containing hydrazine in the piping of a power generation plant that operates a steam turbine. The fourth broom of the patent claim 1, characterized in that hydrogen peroxide is injected into the piping system and one pump is operated to circulate water within the piping system! A method for treating human ginseng water as described in lk. (4111) A method for treating drazine water according to claim 4111, wherein a catalyst device is provided downstream of the pump and the mixed water is passed through a catalyst that speeds up the reaction of the mixed water of hydrazine and hydrogen peroxide. (4) Hydrazine water is used as waste liquid in a tank installed in a power plant that operates a steam turbine, and a large amount of peroxide water is injected into the tank and circulated using a pump. A method for treating hydrazine water as described in 1.