Waste heat boiler

Abstract

The invention discloses a waste heat boiler, which comprises: a furnace body; a flue gas inlet; a flue gas outlet; a water-cooled wall arranged in the furnace body; The height of the furnace body is used for stratified combustion; multiple intake valves connected to multiple intake nozzles; intake pipes connected to multiple intake valves; installed in the furnace body and used to detect the temperature of the flue gas A plurality of temperature sensors; an oxygen sensor arranged in the furnace body and used to detect the oxygen concentration in the furnace body; a controller used to control a plurality of intake valves according to the flue gas temperature and the oxygen concentration. In the waste heat boiler of the embodiment of the present invention, multiple intake valves are controlled according to the flue gas temperature and oxygen concentration, so as to carry out secondary combustion on the organic matter in the flue gas, realize the control of the secondary combustion temperature and the deflagration of the organic matter, and the operation is simple. Ensure the safety and reliability of the waste heat boiler.

Description

technical field [0001] The invention relates to the technical field of rare metal smelting, in particular to a waste heat boiler. Background technique [0002] In the smelting of rare and precious metals, the flue gas discharged from the metallurgical furnace contains a large amount of unburned combustibles, of which the main components of the unburned combustibles are organic matter, so the unburned combustibles must be completely burned after entering the waste heat boiler , otherwise in the process of lowering the flue gas temperature, the incompletely burned organic matter will be converted into dioxins. Once the dioxins are brought into the subsequent flue gas treatment system, it will cause an increase in treatment costs and environmental pollution, and reduce the The service life and operating rate of the waste heat boiler. Contents of the invention [0003] This application is made based on the inventor's recognition and discovery of the following problems: [00...

AI Technical Summary

Problems solved by technology

Among them, the deflagration of organic matter will cause the flue gas temperature to rise rapidly and the volume to expand sharply, which will cause the flue gas pressure in the waste heat boiler to rise, and the heating surface of the waste heat boiler will bear excessive flue gas pressure, which will easily cause the furnace body to explode; because the flue gas contains Halogen elements, high flue gas temperature will lead to high temperature corrosion on the heating surface; too high pipe wall temperature, exceeding the metal temperature resistance, will cause the heating surface to burst

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