GGH (gas-gas heater) heating system capable of preventing wet smoke from corroding and blocking pipeline and application method

A heating system, wet flue gas technology, applied in combustion methods, lighting and heating equipment, emission prevention, etc., can solve the problems of high equipment operating costs, GGH corrosion and blockage, short equipment commissioning time, etc., to increase the overall length , to achieve the effect of self-heating balance of flue gas

Pending Publication Date: 2018-05-29
YUNNAN FENG PU TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The present invention aims at the high operating pressure of flue gas generally in the existing GGH system, which contains relatively high liquid phase gypsum and dispersed phase gypsum droplets, resulting in frequent corrosion and blockage of the GGH, resulting in high operating costs of the equipment and long time for the equipment to be put into operation Shorter question, to provide a GGH heating system and method of use that prevent wet flue gas from corroding and clogging pipelines

Method used

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  • GGH (gas-gas heater) heating system capable of preventing wet smoke from corroding and blocking pipeline and application method
  • GGH (gas-gas heater) heating system capable of preventing wet smoke from corroding and blocking pipeline and application method
  • GGH (gas-gas heater) heating system capable of preventing wet smoke from corroding and blocking pipeline and application method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] Such as Figure 1 to Figure 3 As shown, the GGH heating system to prevent wet flue gas from corroding and blocking pipes includes a coal-fired boiler 1, a dust collector 2, a flue gas reheating structure 3, and a smoke exhaust device 5. The exhaust port of the coal-fired boiler 1 passes through a first connecting pipe 801 It communicates with the air inlet of the dust collector 2, the exhaust port of the dust collector 2 communicates with the air inlet of the flue gas reheating structure 3 through the smoke inlet pipe 6, and the exhaust end of the flue gas reheating structure 3 passes through the smoke pipe 7 Connected with the air inlet of the smoke exhaust device 5, the flue gas reheating structure 3 includes a heat exchanger 11, a desulfurization device 12, a demister 13 and a flash evaporator 14, and the heat exchanger 11 is provided with a heat exchange chamber 19 and a heat exchange chamber. Pipe 17, the heat exchange pipe 17 is located in the heat exchange chambe...

Embodiment 2

[0043] Based on Embodiment 1, the heat exchange tubes 17 are side-by-side straight tubes, and the inlet and exhaust ports of the heat exchange tubes 17 are located on both sides of the heat exchanger 11 .

[0044] In use, the heat exchange tubes are arranged as side-by-side straight tubes, and the total length of the heat exchange tubes is increased so that there is enough space to transfer more heat.

Embodiment 3

[0046] Based on Embodiment 2, a partition plate 18 is provided in the heat exchange chamber 19, and the partition plate 18 is perpendicular to the heat exchange tube 17, and the heat exchange tube 17 passes through the partition plate 18, and the partition plate 18 divides the heat exchange chamber 19 into a first heat exchanger. The heat chamber 1901 and the second heat exchange chamber 1902.

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Abstract

The invention relates to the field of industrial desulfuration, in particular to a GGH (gas-gas heater) heating system capable of preventing wet smoke from corroding and blocking a pipeline and an application method. Smoke generated from combustion of a coal boiler is delivered by an induced draft fan, and large-particle impurities in the smoke are adsorbed by a dust remover. The wet smoke entersa demister after passing through a desulfuration device. The demister comprises a maze-type mist removing device and an electric-capture mist removing device, and large liquid-phase gypsum in the wetsmoke is captured and removed. Only dispersed-phase gypsum drops are left in the wet smoke processed by the demister. Instantaneous heat transfer and mass transfer are realized through rapid mixing ofcold smoke and hot smoke, the dispersed-phase gypsum drops of the wet smoke are evaporated rapidly, the contents of the liquid-phase gypsum and the dispersed-phase gypsum drops in the smoke are reduced, blocking and corrosion probability is reduced greatly during later discharge, and accordingly, the problems of frequent corrosion and blockage of GGHs, high equipment operation cost and short equipment operation time due to prevalent high smoke operation pressure in GGH systems are solved.

Description

technical field [0001] The invention relates to the field of industrial desulfurization, in particular to a GGH heating system and a use method for preventing wet flue gas from corroding and blocking pipelines. Background technique [0002] The GGH heating system is a heating system based on the gypsum wet flue gas desulfurization method. It uses the original flue gas to heat the desulfurized clean flue gas, so that the exhaust gas temperature reaches above the dew point, reduces the corrosion of the inlet flue and chimney, and improves Diffusion of pollutants; at the same time, reduce the temperature of flue gas entering the absorption tower, and reduce the technological requirements for anti-corrosion in the tower. [0003] The existing GGH flue gas reheater increases the temperature of the net flue gas by 25-40°C, and the temperature of the net flue gas after desulfurization reaches above the dew point temperature, which reduces the corrosion of the flue gas on the flue a...

Claims

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Application Information

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IPC IPC(8): F23J15/00F23J15/08F23J15/02
CPCF23J15/006F23J15/02F23J15/025F23J15/08F23J2215/20Y02E20/30
Inventor 赵铁朱鸿野
Owner YUNNAN FENG PU TECH
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