Boiler flue gas energy-saving white plume elimination device

Abstract

The invention provides a boiler flue gas energy-saving white plume elimination device. The device comprises a boiler, and an air preheater, a dust collector, an induced draft fan, a desulfurization absorber tower and a chimney sequentially connected to the boiler through a flue. An air inlet and a blower of the boiler is connected to the air preheater through a air blow duct, a blower heater is provided at an inlet or an outlet of the blower, a heat medium water inlet and a heat medium water outlet is provided at the blower heater, the heat medium water inlet and the heat medium water outlet are sequentially connected to the flue gas residual heat exchanger and the heat medium water cooling device through a heat medium water pipe, and a heat medium water power driving device is provided atthe heat medium water pipe. The boiler flue gas energy-saving white plume elimination device provided by the the invention can not only fully recover the waste heat of the flue gas, but also has theobvious heat pump function, and can improve the grade and utilization efficiency of the recovered heat energy.

Description

technical field [0001] The invention relates to the field of energy saving and environmental protection, in particular to an energy saving and whitening device for boiler flue gas. Background technique [0002] In the existing boiler flue gas treatment system, the flue gas produced by the boiler usually passes through the air preheater, dust collector, induced draft fan, and desulfurization absorption tower in sequence, and then is discharged into the chimney and enters the atmosphere; Part of the waste heat of the flue gas will be recovered in the desulfurization tower, but due to the low-temperature corrosion of the air preheater, the temperature of the flue gas discharged from the outlet of the air preheater is still high, so the temperature of the flue gas entering the desulfurization tower is still high, absorbing The desulfurization slurry in the tower will absorb a large amount of latent heat of vaporization, and part of the water will be evaporated and discharged int...

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Problems solved by technology

[0002] In the existing boiler flue gas treatment system, the flue gas generated by the boiler usually passes through the air preheater, dust collector, induced draft fan, and desulfurization absorption tower in sequence, and then is discharged into the chimney and enters the atmosphere; Part of the waste heat of the flue gas will be recovered in the desulfurization tower, but due to the low-temperature corrosion of the air preheater, the temperature of the flue gas discharged from the outlet of the air preheater is still high, so the temperature of the flue gas entering the desulfurization tower is still high, absorbing The desulfurization slurry in the tower will absorb a large amount of latent heat of vaporization, and part of the water will be evaporated and discharged into the atmosphere along with the flue gas. In addition, due to the high temperature of the flue gas discharged into the atmosphere, a large amount of latent heat of vaporization carried by water vapor and Sensible heat is discharged into the atmosphere, causing energy loss, and carrying a large amount of water, causing water loss and environmental pollution, resulting in serious white smoke from the chimney

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