Boiler combustion and waste heat recovery comprehensive monitoring intelligent control system

Abstract

The boiler combustion and waste heat recovery comprehensive monitoring intelligent control system of the present invention includes field instruments, alarm devices, control valves, a main controller and an information platform. The main controller collects information including water temperature, smoke temperature, cumulative and instantaneous heat recovery, cooling water flow, harmful gas discharge, oxygen content, boiler water supply temperature and flow, and boiler energy consumption information, calculates boiler thermal efficiency, monitors equipment resistance changes, harmful Gas and boiler combustion conditions and make adjustments, and complete local and remote alarms and communication with the information platform. Its beneficial effect is: it integrates the monitoring of operating state parameters, harmful gas monitoring, waste heat recovery heat monitoring, boiler thermal efficiency monitoring and analysis, failure and safety hazard analysis and alarm, and remote monitoring, and solves the problem of adding waste heat recovery equipment to the smoke exhaust system. After the waste heat recovery equipment has problems, it becomes an effective comprehensive monitoring intelligent control system.

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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