Boiler combustion and waste heat recovery integrated monitoring intelligent control system

Abstract

The invention discloses a boiler combustion and waste heat recovery integrated monitoring intelligent control system which comprises a field instrument, an alarm device, a control valve, a main controller and an information platform. The main controller collects water temperature, smoke temperature, accumulated and instantaneous recovery heat, cooling water flow, harmful gas discharge, oxygen content, the temperature and the flow of water supplied by a boiler and boiler energy consumption information, the heat efficiency of the boiler is calculated, equipment resistance change, harmful gas and the boiler combustion condition are monitored, adjustment is carried out, local and remote alarming is achieved, and the communication with the information platform is achieved. The boiler combustion and waste heat recovery integrated monitoring intelligent control system has the advantages that operation stat parameter monitor, harmful gas monitor, waste heat recovery heat monitor, boiler heat efficiency monitor and analysis, fault and potential safety hazard analysis alarming and remote monitor are integrated, the problems existing after waste heat recovery equipment is added to a smoke exhaust system are solved, and the integrated monitoring intelligent control system is effective.

Description

technical field [0001] The invention relates to a monitoring system, in particular to an intelligent control system for comprehensive monitoring of boiler combustion and waste heat recovery. Background technique [0002] One of the main equipment of the heat source of the heating system is a gas boiler, and the overall heat output capacity of the boiler is evaluated by its own thermal efficiency. The two main factors affecting the thermal efficiency of the boiler are the combustion efficiency of the boiler and the heat loss of the boiler exhaust. The main indicators of the adequacy of the flue gas are the oxygen content and carbon monoxide content in the flue gas. These two indicators change in real time with the operating conditions. The main measure of boiler exhaust heat loss is the exhaust temperature. In order to recover a large amount of heat in the flue gas, the equipment usually used is the flue gas waste heat recovery device. [0003] After adding waste heat recove...

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Problems solved by technology

[0003] After adding waste heat recovery equipment to the smoke exhaust system, there are some problems as follows: ① After adding new equipment to the smoke exhaust system, the system resistance will inevitably change. The oxygen content and carbon monoxide content in the air will definitely change, which will affect the combustion efficiency of the boiler. If it cannot be detected and adjusted in time, the thermal efficiency of the boiler will eventually decrease

② When the boiler is not fully burned, it will produce a large amount of carbon monoxide gas, causing air pollution. If the flue is not tightly sealed and the smoke exhaust is not smooth, there will be a serious safety hazard of carbon monoxide leakage causing poisoning of operating personnel

③ The accumulated heat recovered by the waste heat recovery equipment has not been measured, the working parameters cannot be recorded in real time, and the effect of the waste heat recovery equipment cannot be quantified

④ The operating status of the waste heat recovery equipment is not monitored, and there is no alarm in the event of blockage, under-flow, dry burning, etc., resulting in serious damage to the equipment

⑤ The waste heat recovery equipment itself is a fixed heat exchange equipment, and its operating status itself is difficult to be compatible with the automation information system, resulting in the lack of overall monitoring of the heating system

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