Coke dry quenching all-system dynamic air tight test method

Abstract

The invention discloses a dynamic air tightness test method of a dry cooling entire system. The dynamic air tightness test method is performed in the following procedures that: the valve of the dry cooling entire system is closed; each natural weep point of the dry cooling entire system is sealed off; a pressure meter is installed on a pipeline of an air outtake of a circular fan; the running of the circular fan is started, the rotating speed of the circular fan is adjusted and plugboard valves on two sides of an air suction opening of the circular fan are turned on in sequence to keep the pressure of the dry cooling entire system in a specific range; a foaming agent is sprayed on the welding line and the flange connecting point of the dry cooling entire system, and if any leakage happens, the mark is labeled; for the flange leakage, the flange connecting bolt can be fixed through spinning, and for the welding line leakage, the treatment is taken after the fan is turned off; after theleakage treatment is finished, the circular fan is turned on again to take an inspection, and circled until no leakage happens. The dynamic air tightness test method of the invention has simple operation, takes short time, saves a large mount of labor force and resources, reduces the construction cost, and improves the construction efficiency.

Description

technical field [0001] The invention relates to an air tightness test method of the whole system of CDQ. Background technique [0002] Coke quenching is an important link in the coking process. After the coal is smelted into coke in the carbonization chamber, it should be pushed out from the carbonization chamber in time. Sent to the blast furnace for ironmaking, the red coke temperature must be lowered to below 300°C. Dry quenching refers to a coke quenching method that uses inert gas to cool red coke. [0003] The whole CDQ system includes a gas circulation system consisting of coke quenching oven, boiler, primary dust collector, secondary dust collector, feed water preheater and circulating gas pipeline. The system is the section of red coke loading, cold coke discharge, inert gas circulation and filling. In the state of production and operation, this interval should be a closed space except for the normally open diffuser, the air inlet valve and the inlet and outlet. ...

AI Technical Summary

Problems solved by technology

[0005] 1) Huge volume, the system gas filling space is about 6000-7000m 3 ;

[0006] 2) Irregular structure;

[0007] 3) There are many natural leakage points allowed by the system, and the system requires airtightness, but the system itself is not a closed system, and the normally open vents, air inlet valves, loading and discharging ports, etc. are not closed in the production and running state

This test method needs to add temporary air source equipment—the air compressor to blow air into the system, and a large number of measures must be taken to tightly seal the natural leakage points such as the normally open diffuser, the air inlet valve, and the inlet and outlet. Whether the leaked air volume leaks from the natural leak point or from the weld and flange joint cannot be judged, and there is no clear standard for pressure drop judgment, which requires a lot of manpower, material resources, and financial resources. The implementation takes a long time and the effect is not obvious

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