Leak detection device for U-shaped waste heat boiler pipe column

Abstract

The invention relates to a leak detection device for a U-shaped waste heat boiler pipe column, and aiming to realize the purpose, the invention adopts the technical scheme that a compression ring is arranged on one side of a pipe plate far from an opening of a casing and connected with the casing; test paper is attached on the end surface of the pipe plate near to the compression ring and two end ports of each U-shaped pipe; a nitrogen bottle and an ammonia bottle are connected to a water inflow interface respectively and communicated with a main valve through a first valve and a second valve respectively; a first ammonia pressure gauge is arranged between the main valve and the water inflow interface; a first interface is connected with a second ammonia pressure gauge through a third valve; closure plates used for sealing a steam outlet and a second interface are arranged at the steam outlet and the second interface respectively; and an emptying valve is arranged at a discharge outlet and connected with a water tank. Through adopting the technical scheme, the leak detection device forms an independent closed system through introducing ammonia and nitrogen in the casing and closing all the valves connected with the container, and the position of a leakage point can be found out as the ammonia can be effused out through a leakage point and color change occurs at the display paper.

Description

[0001] technical field [0002] The invention relates to a leak detection device, in particular to a leak detection device for a U-shaped waste heat boiler tube bundle. [0003] Background technique [0004] Waste heat boiler, also known as waste heat boiler, is a heat exchanger that uses high-temperature streams in the production process as a heat source to produce steam. It is not only a cooler for high-temperature streams in the process, but also a power device that uses waste heat to provide steam. As a process unit operation equipment widely used in other industrial sectors, the main combined components of waste heat boilers are three parts: front-end tube box, shell and rear-end structure (including tube bundle). According to the structure of the U-shaped waste heat boiler, this waste heat boiler is a U-shaped tube heat exchanger, that is, each heat exchange tube is U-shaped, and the two ends are respectively fixed on the upper and lower areas of the same tube plate....

AI Technical Summary

Problems solved by technology

In order to ensure the economical, safe and reliable operation of the equipment, it is necessary to carry out regular inspections and check for leaks on the waste heat boiler. At present, the water filling method, the gas filling method and the nitrogen filling and pressing method are mainly used, but these three methods all have tube sheet and tube bundle leak observations. Defects such as not easy and short pressure holding time of the system

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