Boiler flue gas waste heat recovery device and recovery method

Abstract

The invention discloses a boiler flue gas waste heat recovery device and a recovery method, which belong to the technical field of flue gas waste heat recovery. A boiler flue gas waste heat recovery device includes a device shell, and a heat exchange tube is arranged inside the device shell. The upper end of the air inlet pipe is fixedly connected with the air intake pipe. In the process of waste heat recovery of the flue gas, the present invention pushes the main cleaning ball and the auxiliary cleaning ball through the flue gas flow, so that the main cleaning ball and the auxiliary cleaning ball circulate continuously in the heat exchange tube. Rolling, in the process of waste heat recovery, the inner wall of the heat exchange tube is continuously and continuously cleaned, and the flue gas particles attached to the inner wall of the heat exchange tube are cleaned, and when the main cleaning ball and the auxiliary cleaning ball complete a cleaning of the heat exchange tube, In the process of returning to the inlet end of the heat exchange tube, the processes of self-cleaning, dehydration and drying are also realized in sequence, and then enter the heat exchange tube again to clean the heat exchange tube, thereby further ensuring the cleaning effect of the heat exchange tube .

Description

technical field [0001] The invention relates to the technical field of flue gas waste heat recovery, and more specifically, relates to a boiler flue gas waste heat recovery device and recovery method. Background technique [0002] Due to the shortage of energy sources, with the further development of energy-saving work. A variety of new, energy-saving and advanced furnace types are becoming more and more perfect, and the use of high-quality insulation materials such as new refractory fibers has significantly reduced the heat dissipation loss of the furnace. The advanced combustion device is used to strengthen the combustion, reduce the amount of incomplete combustion, and the air-fuel ratio tends to be reasonable. However, the technology of reducing heat loss from flue gas and recovering flue gas waste heat is still not progressing fast. In order to further improve the thermal efficiency of the kiln and achieve the goal of saving energy and reducing consumption, recovering ...

AI Technical Summary

Problems solved by technology

[0004] However, because the flue gas contains impurities such as particles, dust, and waste residues, the flue gas waste heat recovery device will inhale particles, waste residues, and other impurities together when absorbing the flue gas. During the work process, the particles are easy to accumulate in the heat exchange tube. After long-term use, it is easy to cause blockage of the heat exchange tube, but if the waste heat is recovered after the dust removal treatment, the temperature of the flue gas will decrease, resulting in the waste heat loss of the flue gas

Based on the above problems, in order to ensure the full use of the waste heat of the flue gas, we need to solve the problem of blockage of the heat exchange tubes caused by the soot impurity particles

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