JPS6135327A - Leakage detection of denitration reactor - Google Patents

Abstract

PURPOSE:To detect easily the presence or absence of leakage at a low cost by forcing gaseous CO2 or gaseous N2 into a reactor and coating soap water on the surface. CONSTITUTION:This device are constituted of a denitration reactor 1, the blind plates 2, 2', a gaseous CO2 cylinder 3, a stop valve 4 for sealing gas, a gas conduit 5, a gas introducing mouthpiece 6, a gas detecting mouthpiece 6' and a U pipe 7. The conduit 5 drawn from the cylinder 3 is connected to the reactor 1 and the mouthpiece 6 of the plate 2 and is fastened by means of a metallic wire so that the gas can be sealed therein. The U pipe 7 made of, for example, a vinyl hose, etc. is attached to the mouthpiece 6' and is connected to the plate 2 or 2' so that the inside pressure sealed in the reactor 1 can be checked. The valve 4 of the cylinder 3 is then opened or closed to increase the inside pressure of the reactor 1. The soap water is sprinkled on the outside of the reactor 1 and the presence or absence of the bubbling thereof is observed, by which the presence or absence of leakage of the gas from the reactor 1 is checked.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an improvement in a method for detecting the presence or absence of gas leakage from a denitrification reactor.

(Prior art) During the manufacturing process of a boiler or heater furnace river flue, after completing the assembly of the duct used as the wind flue, compressed air is filled in and tested for leakage. I'm looking forward to it. If this method is applied to a denitrification reactor, water droplets, oil, and other impurities contained in the compressed air will have an adverse effect on the catalyst built in the reactor duct, significantly reducing the reaction ability of the catalyst. However, if an air drying device and a filtration device are installed for this purpose, it will be a large-scale operation, which will be costly and time consuming.

(Problems to be Solved by the Invention) It is an object of the present invention to provide an inexpensive method for detecting the presence or absence of a leak in a denitrification reactor, which eliminates the drawbacks of conventional methods.

(Means for Solving the Problems) The present invention involves pressurizing CO, gas, or N gas into a denitrification reactor, applying soapy water to the outer surface of the reactor, and determining whether or not the reactor is bubbling. This is a leakage detection method for a denitrification reactor, which is characterized by determining leakage.

Check for leakage by diagonally injecting CO or gas (horse gas is also acceptable) into the denitrification reactor.

When using this method, the factory is generally equipped with a gas cylinder for welding, and the gas is drawn directly from the gas cylinder to C using a vinyl pipe, and the reactor is opened and closed by simply opening and closing the cylinder cock. It is possible to seal gas within the duct.

Gas pressure can also be easily measured by bending vinyl W into a ``U-shaped tube,'' making it easy to check. Therefore, it is a method that allows a relatively large amount of time in terms of process and allows testing to be carried out at low cost.

The present invention can be advantageously applied as a method for determining gas leaks from outside the denitrification reactor, such as from wind flue ducts.

Hereinafter, one embodiment of the present invention will be described with reference to FIGS. 1 and 2. FIG. 1 shows a schematic view of the present invention during a leak test, and FIG. 2 is a view taken along the line A--A in FIG.

In the figure, 1 is a denitrification reactor, 2.2' is a steel blind plate (
This part is the entrance and exit of the reactor 1 (the blind plate is removed when installing the reactor 1 in the flue), 3 is the CO, gas cylinder, 4 is the opening/closing pulp for gas filling, 5 gas pipes, 6
rt'i gas inlet cap, 6' is gas detection cap, 7 is U
Chill with a square tube (for gas pressure measurement).

A gas conduit (for example, a vinyl hose) 5 is drawn from the gas cylinder 3, connected to the denitrification reactor 1 and the mouthpiece 6 of the blind plate 2, and secured with a wire so that the gas can be sealed.

A U-shaped tube 7 made of, for example, a vinyl hose is attached to the base 6' of the blind plate 2 or 2' so that the internal pressure sealed in the denitrification reactor can be checked.

Next, increase the internal pressure of the denitrification reactor 1 (generally about 0 to 10001111 Aq) by opening and closing the valve 4 of the gas cylinder 3, sprinkle soapy water on the outside of the reactor 1, and observe whether or not the soapy water bubbles. Check for gas leakage from the denitrification reactor.

The method of the present invention has the advantage that the leak test device is simple, the pressure is not increased too much, the maintenance is easy, the test time is saved, and the costs are low.

[Brief explanation of the drawing]

Figures 1 and 2 are diagrams for explaining one embodiment of the present invention; Figure 1 is a schematic diagram during a leak test, and Figure 2 is a view taken along line A-A in Figure 1. be. Sub-agents 1) Meifuku agent Ryo Hagiwara -

Claims (1)

[Claims] Pressurely inject CO_2 gas or N_2 gas into the denitrification reactor,
A method for detecting leakage in a denitrification reactor, comprising applying soapy water to the outer surface of the reactor, and determining leakage from the reactor based on the presence or absence of bubbling.