Dry quenching primary dust removal cooling system leakage detection system and diagnosis method

Abstract

The invention provides a dry quenching primary dust removal cooling system leakage detection system and diagnosis method. The system comprises a data acquisition module, a leakage intelligent diagnosis module, a diagnosis information output module, a system leakage verification module and an expert self-learning module. The data acquisition module comprises a water inlet pressure sensor PT01, a water inlet flow sensor F01, a water inlet flow regulating valve FV01, a water return pressure sensor PT02, a water return stop valve XZV01 and a water return flow sensor F02; an instrument monitoring means is added on the basis of a traditional primary dust removal cooling system, and the purpose of unmanned field maintenance is achieved. An intelligent leakage diagnosis system is adopted, an intelligent diagnosis method integrating multiple judgment conditions is adopted, all-around diagnosis information sources are integrated, for each judgment condition, the real-time state of process data is considered, the change rate of the data is increased, comprehensive diagnosis information is given through weighted model calculation, and the accuracy and timeliness of leakage diagnosis of the cooling system are improved.

Description

technical field [0001] The invention relates to the technical field of dry coke quenching production, in particular to a leakage detection system and a diagnosis method of a primary dedusting and cooling system for coke dry quenching. Background technique [0002] With the improvement of the country's environmental protection requirements and the maturity of CDQ technology, CDQ production technology has been widely used in the coking field, and even full CDQ production technology has been adopted in some advanced large-scale coking enterprises. During the CDQ process, the red coke is loaded from the top of the CDQ furnace, and the low-temperature inert gas is blown into the red coke layer in the cooling section of the CDQ furnace by the circulating fan to absorb the sensible heat of the red coke, and the cooled coke is discharged from the CDQ furnace. Exhausted from the bottom, the high-temperature inert gas from the annular flue of the CDQ furnace flows through the primary ...

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Problems solved by technology

[0004] 1) When the circulating cooling water in the cooling pipe leaks, a large amount of water enters the CDQ primary dust collector, contacts with the hot coke powder and turns into water vapor, enters the CDQ circulation system, and finally with the CDQ oven The coke undergoes a water-gas reaction to generate hydrogen and carbon monoxide, resulting in a sharp increase in the concentration of combustible components in the circulating gas and destroying the balance of the circulating gas. Due to leakage in the negative pressure section of the CDQ circulating gas or the circulation fan stops operating during production shutdown, there is a The situation where air enters the circulating gas, that is, the presence of air can easily cause an explosion accident

[0005] 2) When the circulating cooling water in the cooling pipe leaks, the cooling water invades the powder coke layer, and a large amount of soaked coke powder cannot be discharged from the cooling jacket to block the lower space of the dust collector, causing the pressure of the circulating gas passing through here to increase and seriously Restrict the increase of circulating air volume, thereby reducing the CDQ rate of CDQ

[0006] 3) When the circulating cooling water in the cooling pipe leaks, it is easy to cause the coke powder in the cooling jacket to swell, so that the upper material level gauge shows a high material level, but the actual coke powder material level in the water cooling jacket is not high. At this time, according to the wrong high material level signal to prolong the operation time of the lower ash discharge valve, the coke powder in the lower part of the cooling jacket will be completely emptied, and a large amount of cold air will be sucked from the format ash discharge valve into the water cooling casing, and will flow in the double fork chute. Severe combustion occurs at the position, which will lead to the peeling of the pouring material of the double fork chute, which will further cause the shell of the double fork chute to oxidize and burn through at high temperature. At the same time, the upper material level instrument of the primary dust removal will also be damaged due to the continuous high temperature

Cause serious economic loss, can not guarantee the normal continuous production of coke CDQ

[0007] When the cooling system of the primary dust collector leaks, it is necessary to stop the CDQ production urgently to replace the cooling equipment. During the maintenance period, it is necessary to adjust the CDQ production plan, which may even affect the production plan of the coke oven.

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