Steel rolling production line smoke waste heat recovery system and waste heat recovery method
A flue gas waste heat and recovery system technology, applied in the field of industrial waste heat recovery and utilization, can solve problems such as affecting the quality of hot-rolled production products, large furnace pressure fluctuations, etc., and achieve the effects of easy control and maintenance, reduction of emissions, and energy saving.
Inactive Publication Date: 2013-10-09
SHANGHAI BAOSTEEL ENERGY TECH
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Problems solved by technology
[0003] The invention provides a flue gas waste heat recovery system and a waste heat recovery method of a steel rolling production line to solve the defects in the prior art that the waste heat recovery system easily causes large fluctuations in furnace pressure and affects the quality of products produced by hot rolling
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[0025] see figure 1, a waste heat recovery system for flue gas from a steel rolling production line provided in this embodiment is improved on the basis of the flue gas discharge device of the original steel rolling production line. The original flue gas discharge device of the steel rolling production line includes a flue gas regulating valve 1 and a chimney 7 The flue gas waste heat recovery system of the steel rolling production line in this embodiment is connected between the flue gas regulating valve 1 and the chimney 7 on the original flue of the steel rolling production line, and its main components include the waste heat heat exchange subsystem 5. In this embodiment, the waste heat The heat exchange subsystem is a waste heat boiler system. The waste heat boiler system enters the normal temperature feed water and generates the required superheated steam through heat exchange with the flue gas; the flue gas inlet of the waste heat heat exchange subsystem 5 passes through ...
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The invention provides a steel rolling production line smoke waste heat recovery system and a waste heat recovery method. The waste heat recovery system comprises a waste heat exchange auxiliary system. A valve is arranged on a smoke inlet and a smoke outlet of the waste heat exchange auxiliary system and between a smoke adjusting valve of an original flue of a steel rolling production line and a chimney respectively, and namely, three valves are arranged for switch-in and switch-out control of the waste heat exchange auxiliary system, so that the switch-in, switch-out and operation of the waste heat exchange auxiliary system do not influence production of the steel rolling production line. A frequency conversion fan is arranged for controlling the furnace pressure, and the frequency conversion of the frequency conversion fan can adapt to various conditions of the smoke flow change during the production of the steel rolling production line, so that the furnace pressure of a furnace of the steel rolling production line does not change basically, and the normal production of the steel rolling production line is achieved. In addition, a control system and an alarm system are arranged additionally for achieving automatic control. According to the smoke waste heat recovery system, process energy consumption of the steel rolling production line can be lowered remarkably by recovering smoke waste heat, energy is saved, emission is reduced, and the normal production of the steel rolling production line is not influenced.
Description
technical field [0001] The invention relates to the technical field of industrial waste heat recovery and utilization, in particular to a waste heat recovery and utilization process of a steel rolling production line, especially a waste heat recovery system and waste heat recovery method for a steel rolling production line flue gas. Background technique [0002] The flue gas discharge of the heating furnace is divided into two types: conventional flue discharge and regenerative burner flue discharge. Generally, the temperature of the flue gas discharged through the conventional flue is between 250 and 610°C, and the temperature of the flue gas discharged through the flue of the regenerative burner is lower than 200°C. Due to the high temperature and large flow rate of the flue gas discharged through the conventional flue, if the waste heat is recovered and utilized, the energy saving effect is remarkable and certain economic benefits can be achieved. However, at present, th...
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IPC IPC(8): F27D17/00F22B1/18C21D1/00
Inventor 潘金荣曹先常黄恩民王芳
Owner SHANGHAI BAOSTEEL ENERGY TECH