Gas-making furnace jacket fused salt heat exchanging system

Abstract

The invention relates to a gas-making furnace jacket fused salt heat exchanging system. The system comprises a gas-making furnace and also comprises a fused salt storage tank, wherein the outlet of the fused salt storage tank is connected with the inlet of a fused salt pump; the outlet of the fused salt pump is connected with the inlet of a jacket boiler; the outlet of the jacket boiler is connected with the inlet of a heat exchanger; the outlet of the heat exchanger is connected with the inlet of the fused salt pump; and the medium in the fused salt storage tank is liquid-state fused salt. The technical scheme shows that the liquid-state fused salt in the fused salt storage tank is cycled through the fused salt pump and then fed to the gas-making furnace jacket boiler for further cycle heating, and then heats soft water by the heat exchanger to generate saturated steam, and then the steam is self-used by overheating or externally supplied; and the fused salt is adopted to replace the soft water to be used as a heat-transfer medium, so that the temperature in the jacket boiler is increased, thereby reducing the heat taken away by the heat-transfer medium in the jacket boiler, reducing the loss of sensible heat in the gas-making furnace, improving gasification efficiency and greatly improving the cold wall effect of the gas-making furnace jacket boiler.

Description

technical field [0001] The invention relates to a heat exchange system, in particular to a jacketed molten salt heat exchange system for a gas-making furnace. Background technique [0002] The jacket is the auxiliary equipment of the atmospheric fixed bed intermittent or continuous gas-making furnace. Its main function is to reduce heat radiation and prevent the high-temperature molten salt of the gasification layer from adhering to the furnace wall during the gasification process of raw coke or coal, so as to avoid The protection is generated to ensure the stable operation of the furnace. At the same time, the soft water in the jacket absorbs the heat of the gasification layer to generate part of the low-pressure steam, and the low-pressure steam can be used for self-use or external supply after superheating. This traditional jacket can only work at a pressure of 0.1MPa and a temperature of 104-133°C. Due to the effect of the water-cooled wall, the ring wall of the gasific...

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Problems solved by technology

At present, in order to increase the temperature of the inner wall and reduce heat loss, some enterprises adopt the method of increasing the steam pressure, but the increase of the pressure is limited to increase the temperature, the design pressure of the jacket increases, the equipment material and welding technology need to be upgraded, and the main equipment needs to be replaced. , the cost will increase dramatically

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