Steam heating device of liquid ammonia evaporator

Abstract

The invention discloses a steam heating device of a liquid ammonia evaporator. The steam heating device is characterized by comprising an evaporation tank, a steam coil pipe, a steam pipeline, a steam boiler, a liquid waste pipeline and a condensed water recycling barrel. The steam heating device has the advantage of high heat transfer efficiency; a heating medium is kept clean; and energy and loss can be reduced.

Description

technical field [0001] The invention relates to the field of liquid ammonia evaporators, in particular to a steam heating device for a liquid ammonia evaporator. Background technique [0002] The traditional liquid ammonia evaporator uses electric heating to heat the heat medium, that is, desalinated water, and draws the heat medium from the lower end of the evaporation tank. Pour it into the evaporator, heat the liquid ammonia in the liquid ammonia coil to 40°C by exchanging heat with the liquid ammonia coil, and the gaseous ammonia has reached the requirements of the subsequent process, and then use this method to heat the heat medium, which will easily lead to The temperature difference between the upper and lower sides of the heat medium in the evaporator is large, which affects the heat exchange efficiency of the liquid ammonia coil, and it is easy to generate heat energy loss during the process of heating and injecting into the evaporator. At the same time, due t...

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Problems solved by technology

[0002] The traditional liquid ammonia evaporator uses electric heating to heat the heat medium, that is, desalinated water, and draws the heat medium from the lower end of the evaporation tank. Pour it into the evaporator, heat the liquid ammonia in the liquid ammonia coil to 40°C by exchanging heat with the liquid ammonia coil, and the gaseous ammonia has reached the requirements of the subsequent process, and then use this method to heat the heat medium, which will easily lead to The temperature difference between the upper and lower sides of the heat medium in the evaporator is large, which affects the heat exchange efficiency of the liquid ammonia coil, and it is easy to generate heat energy loss during the process of heating and injecting into the evaporator. At the same time, due to the electric heating, the heated heat medium is easy to flush Erosion of the evaporator tank, liquid ammonia coil and the internal parts of the shell not only affects the service life of the equipment, but at the same time, the equipment is prone to generate a lot of noise under various loads during operation, and even vibration of the equipment will cause the equipment to deform

Most of the steam-heated liquid ammonia evaporators on the market today inject steam into the water bath to heat the heat medium, so as to pollute the heat medium and affect the heat transfer and evaporation effect of the heat medium on liquid ammonia.

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