Method for saving vaporization energy in production of hyperpure ammonia

Abstract

The invention discloses a method for saving vaporization energy in production of hyperpure ammonia. The method is characterized in that waste hot steam which is discharged under pressure relief by an air source water heater and a natural gas hydrogen production device is utilized, and automatic mixing is realized so as to produce hot water needed by liquid ammonia vaporization during production of hyperpure ammonia, and a general mode of producing the hot water by electric heating is replaced. Compared with the electric heating mode, the mode provided by the invention has the advantages that energy can be saved by over 80%, the production cost of the hyperpure ammonia and the market sale price of the hyperpure ammonia can be further reduced, and contribution is made to development of LCD (liquid crystal display), OLED (Organic Light Emitting Diode) and LED (light-emitting diode), and other fields of photoelectron and solar cell PV.

Description

technical field [0001] The invention relates to the technical field of energy saving and emission reduction, in particular to a method of automatically mixing waste heat steam discharged from a natural gas hydrogen production device with an air source water heater to generate hot water that meets the requirements of the vaporization conditions of various processes in ultra-pure ammonia production. , instead of using electric heating to generate hot water, compared with electric heating, it can save more than 80% of energy. Background technique [0002] Ultra-pure ammonia is the main raw material required for semiconductor light-emitting diodes (LEDs), flat panel displays (FPDs), semiconductors and crystalline silicon solar cells (the four major industries) (it can be called the food of the four major industries). Cost is closely related to the development of the industry. [0003] The main cost composition of ultra-pure ammonia in the production has the following two aspect...

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Problems solved by technology

[0004] The disadvantages of this type of process are: due to the shortage of power resources in my country and the high price of electricity, in the process of ultra-pure ammonia, the proportion of electricity costs is relatively large, which has caused difficulties in further reducing the production cost of ultra-pure ammonia and the market sales price; At the same time, it has brought the same difficulties to the further reduction of product manufacturing costs and market sales prices in the four major industries of my country's semiconductor light-emitting diodes (LEDs), flat panel displays (FPDs), semiconductors and crystalline silicon solar cells, and has restricted them to a certain extent. The development of these four industries

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