Heat energy storage and release system based on tubular heating furnace

Abstract

The invention discloses a heat energy storage and release system based on a tubular heating furnace. The heat energy storage and release system comprises a phase change heat storage material, a heat preservation layer, an energy storage medium circulating unit, an energy storage outer conveying pipeline and an energy storage outer heat collector. The heat preservation layer is arranged in an energy storage tank excavated in soil. The phase change heat storage material is completely wrapped with the heat preservation layer. Positions above the heat preservation layer are backfilled with soil. The energy storage medium circulating unit is connected with the phase change heat storage material and the energy storage outer heat collector connected in a flue gas pipeline of the tubular heating furnace at the same time. Heat energy in the flue gas pipeline is stored in the phase change heat storage material after being subjected to heat exchange with the phase change heat storage material. The energy storage outer conveying pipeline is connected with the phase change heat storage material at the same time. The heat energy stored in the phase change heat storage material is released outwards through the energy storage outer conveying pipeline when needed. By means of the heat energy storage and release system, waste heat of the tubular heating furnace can be stably stored in a centralized manner, device energy consumption and the production cost are reduced, and climate change caused by greenhouse gas emission is reduced to the maximum extent.

Description

Technical field [0001] The invention relates to an energy storage system for a tubular heating furnace, and belongs to the technical field of petrochemical heating tubular heating furnace equipment. Background technique [0002] Tubular heating furnace is a process heating furnace used in petroleum refining, petrochemical and chemical, chemical fiber industry, coal chemical industry, and coal-to-liquid. The heated material flows in the tube, but gas, liquid, and gas, liquid, and solid particles containing solid particles. Phase medium. Moreover, these media are flammable and explosive substances, which are dangerous [0003] The energy consumption of the tube heating furnace occupies a considerable proportion in the device, and can reach 90% at the maximum. Thermal efficiency is an important indicator of the advanced nature of tubular heating furnaces. Affected by the processing technology and cold source medium, the heating furnace is generally equipped with an air preheater, wh...

AI Technical Summary

Problems solved by technology

Due to the influence of sulfur-containing fuel, the sulfur-containing flue gas will produce sulfuric acid liquid with the water vapor in the flue gas at low temperature, which will corrode the air preheater. Usually, the exhaust gas temperature of the heating furnace is Low exhaust gas temperature will rapidly corrode the air preheater, endangering the stable operation of equipment and systems

[0004] Since the waste heat of the heating furnace is a low-grade waste heat, it cannot meet the needs of industrial high-quality heat sources under the existing process flow

Waste heat recovery is currently only available in real time, limiting the use of waste heat for seasonal heating and heating

[0005] In a typical 10-million-ton oil refinery, the exhaust gas emission from the heating furnace is about 70x10 4 N m 3 / h, there is a large amount of flue gas waste heat that has not been utilized, which not only causes a waste of energy, but also pollutes the environment

Due to factors such as processing technology, heat exchange process, and no available cold source, there is no suitable method to recover this part of waste heat. Even if there are individual methods to recover, the cost of utilization is too high, and the scale and scope of use are greatly limited. , can not be widely used in industry

Images