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Afterheat utilization and predesulfurization method of tunnel kiln smoke desulfurization system

A desulfurization system and flue gas waste heat technology, applied in separation methods, chemical instruments and methods, waste heat treatment, etc., can solve problems such as limiting system desulfurization efficiency, energy loss, and high working pressure of desulfurization towers

Inactive Publication Date: 2017-12-12
成都市新力设备制造有限责任公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

[0005] In the prior art sodium-calcium double-alkali wet tunnel kiln flue gas desulfurization process, the roasting flue gas from the tunnel kiln is directly transported to the desulfurization tower for desulfurization and dust removal, and the roasting flue gas containing relatively high heat energy is directly cooled in the desulfurization tower, resulting in energy consumption A large amount of loss, while sulfur dioxide completely reacts in the tower, resulting in high working pressure of the desulfurization tower, which limits the desulfurization efficiency of the system

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  • Afterheat utilization and predesulfurization method of tunnel kiln smoke desulfurization system

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Embodiment Construction

[0014] This specific embodiment is realized by following technology:

[0015] The wet billet 1-1 is dried at high temperature in the drying kiln 1, and a large amount of heat energy is required during the drying process. After the wet billet 1-1 is dried, it becomes a dry billet 2-2, which is transported to the tunnel kiln 2 for roasting, and high temperature is generated during the roasting process Roasting flue gas contains harmful gases such as sulfur dioxide.

[0016] The roasting flue gas is transported to the drying kiln 1 through the first blower 3 and the first air pipe 4. At this time, a large amount of heat energy in the roasting flue gas can continuously supply heat to the drying kiln 1, so as to achieve the purpose of utilizing the waste heat of the roasting flue gas.

[0017] During the drying process of the wet billet 1-1 in the drying kiln 1, a large amount of high-temperature water vapor is produced. At this time, the water vapor reacts with the sulfur dioxide ...

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Abstract

The invention discloses an afterheat utilization and predesulfurization method of a tunnel kiln smoke desulfurization system. Roasting smoke of a tunnel kiln 2 is conveyed to a drying kiln 1 through a first fan 3 and a first air pipe 4; at this time, a lot of heat energy in the roasting smoke can continuously supply heat to the drying kiln 1 to achieve the afterheat utilization purpose of the roasting smoke; meanwhile, in the drying process of the drying kiln 1, a lot of high-temperature water vapor is generated; and the water vapor is reacted with sulfur dioxide gas in the roasting smoke to generate sulfurous acid steam, so that predesulfurization of the roasting smoke before conveying to a desulfurization tower 7 through a second fan 5 and a second air pipe 6 is realized, the working pressure in the desulfurization tower 7 is reduced, and the desulfurization efficiency of the system is improved.

Description

Technical field: [0001] The invention relates to a tunnel kiln flue gas desulfurization system, in particular to a tunnel kiln flue gas desulfurization system waste heat utilization and pre-desulfurization method. Background technique: [0002] Tunnel kiln flue gas desulfurization refers to the removal of sulfur oxides (SO 2 and SO 3 ) are settled by chemical methods. [0003] In the tunnel kiln roasting process in the brick and tile field, the wet billet with high moisture content is first transported to the drying room for drying, and then transported to the tunnel kiln for roasting. The roasting flue gas contains high heat energy, dust and harmful gases such as sulfur dioxide. , needs desulfurization and dust removal treatment and can only be discharged into the atmosphere after reaching the emission standard. [0004] Sodium-calcium double-alkali wet desulfurization is an ideal cutting-edge technology for tunnel kiln flue gas desulfurization in the field of bricks and...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00F26B21/14B01D53/50B01D53/76
CPCF27D17/004B01D53/50B01D53/76F26B21/14
Inventor 肖功方
Owner 成都市新力设备制造有限责任公司