Gas boiler smoke waste heat utilization and white mist removal system and method

A gas-fired boiler, flue gas waste heat technology, applied in combustion methods, lighting and heating equipment, indirect carbon dioxide emission reduction and other directions, can solve problems such as waste of water resources

CN109114582AActive Publication Date: 2019-01-01北京华通兴远供热节能技术有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
Publication Date
2019-01-01

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Abstract

The invention discloses a gas boiler smoke waste heat utilization and white mist removal system and a method. The system comprises a gas boiler and a combustor, a smoke outlet of the gas boiler is connected with a main smoke flue and a branch smoke flue, the main smoke flue is connected with a waste heat depth utilization device, an air / smoke mixing, condensing and dehumidifying device and a heating and humidity reduction device, the waste heat depth utilization device and air / smoke mixing, condensing and dehumidifying device are connected with a condensed water recycling device, and the branch smoke flue is connected with an air / smoke mixing and preheating device. The method comprises the following steps that a first valve is opened, a second valve is closed, a U-shaped heat exchange headis controlled to move towards the interior of the heating and humidity reduction device, after heat exchange is carried out, the U-shaped heat exchange head is moved out, the second valve is opened,the cooled smoke enters the air / smoke mixing and preheating device, and all the above steps are repeated. The invention aims to provide the gas boiler smoke waste heat utilization and white mist removal system and the method, and the purposes of saving gas, reducing emission and recovering water resources can be achieved.
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Description

technical field

[0001] The invention relates to the field of natural gas boiler energy saving and emission reduction technology and flue gas clean emission, in particular to a gas boiler flue gas waste heat utilization and white mist removal system and method that can simultaneously realize energy saving, low nitrogen emission reduction, and water resource recovery and utilization . Background technique

[0002] With the in-depth advancement of my country's industrialization and urbanization, energy consumption continues to increase, the situation of reducing air pollution is severe, and atmospheric environmental problems are becoming increasingly prominent. Beijing took the lead in completing the coal-to-gas conversion of the heat source of the heating system, realizing the coal-free urban area of ​​Beijing, controlling the content of soot and sulfur in the air, and greatly improving the air quality. Subsequently, Tianjin, Hebei, Shanxi, Xinjiang and other major heating ar...

Examples

Embodiment Construction

[0023] Such as figure 1 As shown, the gas-fired boiler flue gas waste heat utilization and white mist removal system in the present invention includes a gas-fired boiler 2 and a burner 1 that are connected to each other. The smoke outlet of the gas-fired boiler 2 is connected with a main flue and a branch flue. The main flue is connected to the chimney, and the main flue is connected with a waste heat depth utilization device 3, an air / flue gas mixed condensation dehumidification device 4 and a temperature raising and dehumidification device 5, and the waste heat depth utilization device 3 and the air / smoke The gas mixing condensation dehumidification device 4 is connected with a condensed water recovery and utilization device. The waste heat depth utilization device 3 exchanges heat with the flue gas flowing through the waste heat depth utilization device 3 through the boiler return water, and the air / flue gas mixed condensation The dehumidification device 4 exchanges heat wi...