Method and system for ultra-low emission and efficient energy-saving coupling operation of boiler or kiln

Abstract

The invention discloses a method and system for ultralow emission and efficient energy-saving coupling operation of a boiler or a kiln. The method comprises the following steps: determining an influence factor group influencing the operation state of environment-friendly equipment; determining an ultralow emission index and an energy and material consumption index; determining comprehensive evaluation indexes of ultra-low emission operation and energy-saving coupling operation; acquiring required historical operation data and regulation and control parameters according to the determined influence factor group; preprocessing the historical operation data and the regulation and control parameters; establishing an ultralow emission model, an energy consumption and material consumption model and a comprehensive evaluation model, and performing model analysis by utilizing the preprocessed data; verifying the ultralow emission model, the energy consumption and material consumption model andthe comprehensive evaluation model; carrying out coupling processing to obtain a coupling model of ultralow emission and efficient energy-saving operation of the boiler or the kiln; carrying out dimension reduction analysis of the influence parameters, and predicting the change trend of the ultralow emission index and the energy consumption index. According to the method and system, the low-energy-consumption and material-consumption operation of the environment-friendly equipment under the ultralow emission index is realized.

Description

technical field [0001] The invention relates to a method and system for coupled operation of ultra-low emission and high efficiency and energy saving of a boiler or kiln, and belongs to the technical field of energy saving and emission reduction. Background technique [0002] Since 2012, due to the deteriorating air environment, China has begun to strictly control air pollution, requiring new requirements for technologies represented by NOX emission control for industrial kilns and boiler flue gas. [0003] In order to meet the requirements of ultra-low emissions, boilers and kilns are equipped with three major environmental protection equipments: denitrification, dust removal and desulfurization, which remove NOx, soot and SOx in flue gas respectively. In the actual operation process, due to the fluctuation of the boiler or kiln load, the equipment often deviates from the design operation condition, and the parameter adjustment of the equipment has a hysteresis, resulting i...

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Problems solved by technology

In the actual operation process, due to the fluctuation of boiler or kiln load, the equipment often deviates from the design operation condition, and the parameter adjustment of the equipment has hysteresis, which leads to the increase of energy consumption and material consumption, or cannot Meet ultra-low emission requirements

Even when the load of the boiler or kiln is relatively stable, the operation of the equipment is often in a state of high energy consumption and material consumption in order to meet the requirements of ultra-low emissions. Long-term operation will not only cause waste of resources, but also cause reliable operation of the equipment Decreased sex and stability

[0004] Since there are many factors affecting ultra-low emissions and energy consumption and material consumption, and the influencing process is complex, it is difficult to describe them all using physical models. Therefore, it is necessary to study a method to achieve coupled operation of ultra-low emissions and energy saving and consumption reduction.

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