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Gas exhausting and water containing system and method for lithium bromide recycling desulfurization system

A technology of desulfurization system and recycling, applied in chemical instruments and methods, separation methods, steam condensation, etc., can solve the problems of no recycling, waste of water resources, etc.

Inactive Publication Date: 2010-11-10
XI AN JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the recovery of desulfurization water is mainly carried out through the circulation in the desulfurization tower, but the water vapor in the flue gas after wet desulfurization has not been recovered.
The flue gas after desulfurization carries more than 30% water vapor. If it is not recycled and directly discharged into the atmosphere, it will cause a huge waste of water resources

Method used

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  • Gas exhausting and water containing system and method for lithium bromide recycling desulfurization system
  • Gas exhausting and water containing system and method for lithium bromide recycling desulfurization system

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Embodiment Construction

[0016] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0017] see figure 1 , the present invention includes a desulfurization tower 2 and a chimney 4 connected to the flue gas channel of the boiler 1, and a surface heat exchanger 3 is arranged in the inlet flue of the chimney 4, and the surface heat exchanger 3 is refrigerated with lithium bromide through a pipeline The machine 5 is connected to form a closed cycle loop. The outlet water temperature of the lithium bromide refrigerator 5 is 6-20°C. The cold water is sent to the surface heat exchanger 3 to exchange heat with the flue gas to condense the water in the flue gas. A trough channel for collecting condensed water is provided, and the condensed water after the flue gas is condensed by the surface heat exchanger 3 is sent to the desulfurization tower 2 through the trough channel and pipeline, and a condensed water valve 8 is also set on the pipeline; The s...

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Abstract

The invention relates to a gas exhausting and water containing system and a gas exhausting and water containing method for a lithium bromide recycling desulfurization system. The front section of the inlet of a chimney is provided with a surface heat exchanger; steam extracted from the low-pressure section of a steam turbine is delivered into a lithium bromide refrigerator to produce cold water; the cold water produced by the lithium bromide refrigerator is delivered into the surface heat exchanger to exchange heat with flue gas, so that water vapor in the flue gas is condensed; and the surface heat exchanger is provided with a groove-shaped passage for collecting condensed water. The system and the method have a great significance for water conservation in power plants, particularly northern arid regions lacking water resources. In the method, refrigeration is directly performed by using steam not electricity, so that loss caused by the transformation of steam to electricity to coldness is eliminated.

Description

technical field [0001] The invention belongs to the field of energy saving and emission reduction, and relates to a system and a method for recycling lithium bromide in a large-scale power station to recover water in the exhaust gas of a desulfurization system. Background technique [0002] my country's thermal power generation accounts for more than 80% of the country's total power generation, and the water consumption of thermal power plants is huge. The National Water Resources Bulletin and industry statistics show that the national thermal power water consumption accounts for 45% of the industrial water consumption. According to statistics, the average water consumption of thermal power plants in my country is 3.1-3.5kg / (kw.h), while the water consumption of power generation in developed countries is 2.52kg / (kW h), and the water consumption of South African power plants is only 1.25kg / (kW h), therefore, the water-saving project in thermal power plants in my country is st...

Claims

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Application Information

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IPC IPC(8): B01D5/00F25B15/06
Inventor 谭厚章司纪朋王学斌牛艳青
Owner XI AN JIAOTONG UNIV
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