2results about How to "Reduce ammonia consumption" patented technology

The utility model provides a kind of coal pulverizer coal dust initial temperature promotion device, it is related to the technical field of coal-fired unit, including the flue between denitration device and air preheater and the flue gas inlet of coal pulverizer are communicated to the first pipeline leading out between them, high-temperature dust collector and temperature rising fan are sequentially provided on the first pipeline along the flow direction of flue gas;Flue between induced draft fan and chimney and the flue of first pipeline and second pipeline between high-temperature dust collector and temperature rising fan are converged;Valve group is arranged on the first pipeline and second pipeline;Valve group electric signal is connected with temperature control unit, for calculating the drying output demand temperature of coal pulverizer, solve the existing preprocessing easy to return moisture and technical problem of backflow abrasion equipment, reach the technical effect that internal flue gas of system is used to provide heat for coal pulverizer, while saving energy, reducing coal pulverizer explosiveness, improve low load condition boiler combustion state, improve boiler efficiency.

The invention relates to the technical field of kiln flue gas denitration, and discloses a kiln flue gas ultralow temperature denitration system and method.The method comprises the steps that S1, flue gas data and equipment data are collected and subjected to time alignment, and a synchronous data sequence is obtained; s2, calculating a derivation quantity and a comprehensive change trend quantity according to the synchronous data sequence, and constructing a process feature sequence; s3, establishing a control prediction model to output a control response result, constructing a reaction characterization quantity according to the process feature sequence, constructing a controllability characterization quantity according to the control response result, and generating a denitration reaction state estimation quantity; and S4, calculating an ammonia spraying control quantity and a temperature adjustment control quantity according to the denitration reaction state estimation quantity, applying a change rate constraint according to the controllability characterization quantity, and issuing and executing the ammonia spraying control quantity and the temperature adjustment control quantity. According to the method, self-adaptive distribution of ammonia spraying and temperature adjustment can be achieved under complex working conditions, adjustment oscillation is reduced, and the continuity and reliability of denitration operation are improved.