Flue gas recirculating waste heat utilization process

A flue gas and process technology, which is applied in the field of flue gas recirculation waste heat utilization process to avoid corrosion of heat exchange equipment, reduce heat loss, and reduce excess air coefficient.

Active Publication Date: 2013-04-03
LUOYANG RUICHANG PETROCHEM EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

High exhaust gas temperature and low heating furnace efficiency directly cause waste heat waste and a large amount of fuel consumption

Method used

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  • Flue gas recirculating waste heat utilization process

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Embodiment Construction

[0018] The present invention will be further described below in conjunction with accompanying drawing:

[0019] A flue gas reflux waste heat utilization process, the specific steps of the flue gas reflux waste heat utilization process are as follows:

[0020] a. The flue gas generated after the fuel and air are mixed and burned in the burner 1 enters the heating furnace 2;

[0021] b. Use the high-temperature flue gas generated by the heating furnace 2 to heat the process medium or generate high-temperature steam. The temperature of the high-temperature flue gas is 800~1100°C;

[0022] c. The high-temperature flue gas from the heating furnace heats the process medium or generates high-temperature steam in the high-temperature heat exchange equipment 3. The temperature of the high-temperature steam is lower than the temperature of the flue gas; heat_device4;

[0023] d. The process medium or high-temperature steam is heated in the medium-temperature heat exchange equipment 4...

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Abstract

The invention relates to a flue gas waste heat utilization technology, in particular to a flue gas waste heat utilization process. The provided flue gas waste heat utilization process comprises the following steps: the flue gas generated after the combined firing of fuel and air in a burner (1) enters a heating furnace (2); the high-temperature flue gas from the heating furnace enters a low-temperature heat exchange device (5) after the heat exchange through a high-temperature heat exchange device (3) and a medium-temperature heat exchange device (4); and the combustion-supporting air is preheated in the low-temperature heat exchange device (5) via process medium or medium-temperature steam, and the temperature of the flue gas and the heated combustion-supporting air is decreased to about 150-200 DEG C. According to the invention, the flue gas waste heat is utilized to the utmost extent, the heat loss carried away by the flue gas and discharged in the atmosphere is reduced, the thermal efficiency of the heating furnace is improved, and the energy consumption of the whole process flow is reduced.

Description

technical field [0001] The present invention relates to flue gas waste heat recovery and utilization technology, in particular to a flue gas reflux waste heat utilization process, which is used in petroleum refining, chemical industry, electric power and other industries, where there is high-temperature flue gas generated by a heating furnace to heat the process medium or generate high-temperature steam In the process of etc., the thermal efficiency of the heating furnace is improved by reducing the excess air coefficient. Background technique [0002] In petroleum refining, chemical industry, and electric power production, it is usually necessary to use the high-temperature flue gas generated by the heating furnace to heat the process medium or generate high-temperature steam. The high-temperature flue gas from the heating furnace first heats the process medium or produces high-temperature steam in the high-temperature heat exchange equipment, then heats the process medium...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F27D17/00F23L15/00
CPCY02E20/34Y02P10/25
Inventor 谷敬佩邵松王伟
Owner LUOYANG RUICHANG PETROCHEM EQUIP
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