Compound soot blower system for low-temperature flue gas waste heat recovery system

Abstract

The invention relates to a compound soot blower system for a low-temperature flue gas waste heat recovery system. The compound soot blower system comprises a flue gas waste heat recovery device, wherein an acoustic-wave soot blowing system is arranged at the inlet of the flue gas waste heat recovery device, and a mechanically-vibrating soot removing system is arranged at the outlet of the flue gas waste heat recovery device. According to the invention, the acoustic-wave soot blowing system and the mechanically-vibrating soot removing system are mutually matched, so that the advantage of comprehensive soot blowing of an acoustic-wave soot blower is given a full play, and the advantages of a mechanically-vibrating soot removing device, such as low power consumption and high compact soot deposit removing capacity, are reflected; the soot deposit of a pipe bundle positioned on a heated surface is effectively removed under the action of the compound soot blower system disclosed by the invention, and the heat exchange coefficient is greatly enhanced, so that the efficiency of a waste heat recovery device is increased.

Description

technical field [0001] The invention relates to a composite sootblower system used in a low-temperature flue gas waste heat recovery system, in particular to a composite sootblower system combining a high-intensity acoustic wave sootblower and mechanical vibration, which can solve the problem of low-temperature flue gas waste heat recovery heat exchanger The problem of serious dust accumulation, and can solve the acid dew point corrosion problem of low temperature flue gas recovery, belongs to the field of energy saving technology, Background technique [0002] At present, the exhaust gas loss is the most important factor for the heat loss of various boilers and kilns. With the improvement of energy conservation awareness and the continuous rise of energy prices, making full use of the waste heat of flue gas has become an important way to improve the thermal efficiency of boiler units and realize the utilization of waste heat. However, in the prior art, ordinary waste heat r...

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Problems solved by technology

However, in the prior art, ordinary waste heat recovery devices usually have serious dust accumulation and low-temperature corrosion problems, especially when the waste heat recovery device is installed behind the dust collector or there is a lot of dust in the flue gas, the amount of dust on the wall is large, and a single When the dust is removed by a certain soot blowing method, the effect is not obvious

Excessive dust accumulation not only increases the load of the induced draft fan, reduces the heat transfer efficiency of the heat exchanger, affects the recovery of waste heat, but also causes serious low-temperature corrosion. In severe cases, it affects the normal operation of the boiler system and greatly reduces the energy-saving effect

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