Rotary kiln combustion control device and method

Abstract

The invention discloses a rotary kiln combustion control device and method, and belongs to the technical field of rotary kiln combustion equipment and methods. The device and method are used for rotary kiln combustion control in the vanadium production process. According to the technical scheme, a coal gas component analysis meter and a flue gas oxygen content measuring meter are used for establishing an air-fuel ratio automatic calculation model so that the air-fuel ratio can be automatically calculated in real time, the experience air-fuel ratio value is introduced to an automatic control system at the same time, when the analysis meter breaks down, the system can achieve automatic control continuously, and a true intelligent optimal control system of a rotary kiln is obtained. Coal gas single-circuit control is adopted in the automatic combustion control mode of the rotary kiln, and the defects that the complex control modes of cross limit or feedback and the like are adopted in existing combustion control, parameters cannot be set or used appropriately and the system stabilization time is long are overcome. The rotary kiln combustion control device and method are simple, practical and easy to implement, the temperature deviation of the rotary kiln can be controlled within the range of + / - 5 DEG C, converter gas consumption is lowered by 3%, the conversion rate of vanadium is improved by more than 3%, and considerable economic benefits are brought about.

Description

technical field [0001] The invention relates to a combustion control device for a rotary kiln for producing vanadium, and belongs to the technical field of rotary kiln combustion control equipment and methods. Background technique [0002] The rotary kiln is one of the important equipment for vanadium production. The key to the production process of the rotary kiln is the degree and level of automatic control, which is related to whether the rotary kiln can achieve a high conversion rate of vanadium under the same production conditions, stable operation of the kiln, Put an end to the emission of harmful substances and the level of gas consumption. In the production process of the rotary kiln, realizing energy saving and emission reduction and improving the conversion rate are the goals pursued by the production of the rotary kiln. Among them, the reasonable combustion of gas is particularly important, so that the energy can be fully utilized. However, in actual production, ...

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Problems solved by technology

However, due to the complexity of control ideas and mathematical models, the difficulty of implementation, the strict requirements on site conditions and the serious deviation from the actual site conditions, it is difficult to achieve the best operation of the combustion device.

Combustion control basically relies on operator experience and manual operation. Due to the uneven control level of operators, the gas consumption of the rotary kiln increases, the burning loss of vanadium increases, the conversion rate decreases, and the agglomeration is serious. This situation has not been effectively resolved so far. It is very detrimental to the stable production of vanadium

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