Shell-and-tube heat exchanger for collecting residual heat of boiler

Abstract

The invention relates to a shell-and-tube heat exchanger for collecting residual heat of a boiler. A high-pressure water tank is arranged at the top of the heat exchanger; a plurality of water spraying holes are formed in a connecting part of the high-pressure water tank and the heat exchanger; an ultrasonic atomizer is arranged on each of a left side wall and a right side wall of the heat exchanger; a plurality of atomization holes are formed in connecting parts of the ultrasonic atomizers and the heat exchanger. The high-pressure water tank is arranged at the top of the heat exchanger, and water in the high-pressure water tank is used for flushing smoke dust on tube walls of heat exchange tubes from the water spraying holes; meanwhile, the ultrasonic atomizers are arranged on the side walls of the heat exchanger, so that water mist sprayed out from the ultrasonic atomizers is sufficiently combined with flue gas, and the smoke dust is prevented from being accumulated on the walls of the heat exchange tubes; the relatively high heat exchange efficiency can be continually kept, and the recycling benefits of a residual heat system are improved.

Description

technical field [0001] The invention relates to a waste heat boiler, in particular to a boiler waste heat collection tube heat exchanger. Background technique [0002] During the use of boilers in iron and steel enterprises, a large amount of fuel is usually consumed, accompanied by a large amount of flue gas, and the exhaust gas temperature of the boilers used in iron and steel enterprises is also very high. In the past, these high-temperature flue gases were directly discharged to the atmosphere , resulting in a huge waste of resources. At present, in order to save energy, many technologies have been produced to recover the waste heat of this high-temperature flue gas. In the existing technology, the waste heat recovery and utilization facilities usually used are heat exchangers, which are A device that can not only reduce the temperature of flue gas, but also utilize high-temperature flue gas to achieve the purpose of heat exchange. However, due to the drastic temperatur...

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Problems solved by technology

[0003] The purpose of the present invention is to provide a boiler waste heat collection tube heat exchanger to solve the problem that the boiler flue gas dust content in the existing iron and steel enterprises is large. When using the tube heat exchanger to collect waste heat, the heat exchange tube wall The technical problem that smoke and dust will accumulate on the surface will lead to a decrease in heat exchange efficiency

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