Electrical heating liquid ammonia evaporator with uniform heating effect

Abstract

The invention provides an electrical heating liquid ammonia evaporator with a uniform heating effect. The electrical heating liquid ammonia evaporator comprises a tank body, a coil pipe, an electrical heater, a liquid ammonia steel cylinder, a cylinder and a liquid level meter, wherein a liquid ammonia inlet, an air outlet, a demineralized water inlet, a gas ammonia outlet, a thermal resistor and a thermometer are sequentially arranged on the tank body, so that abnormal overhigh pressure of the equipment can be avoided; the coil pipe is arranged inside the tank body; the electrical heater is arranged at the bottom of the tank body; the liquid level meter is fixedly arranged on the tank body; the liquid ammonia steel cylinder and the cylinder are connected with the tank body by virtue of a pipeline, so that heating is uniform. By utilizing demineralized water for direct heating, the temperature can be increased to 70 DEG C, the conversion efficiency is improved, and the service life is prolonged. The phenomena such as extremely high noise, vibration and deformation under various loads are avoided, excessive washout for parts at the shell inlet and inside the shell is avoided, the evaporator is safe, reliable and wide in application range, and the service life of the product is effectively prolonged.

Description

technical field [0001] The invention relates to the technical field of a liquid ammonia evaporator. Background technique [0002] The liquid ammonia evaporator is a heat exchange device. It uses the gasification of liquid ammonia to absorb a large amount of heat to cool the cooled material flowing through the tube. With the development of society, the requirements for the emission of nitrogen oxides from thermal power plants have been greatly improved. The flue gas denitrification of thermal power plants mainly uses ammonia as a reducing agent, through which nitrogen oxides are converted into harmless nitrogen and water vapor. Nitrogen is mainly formed by the evaporation of liquid ammonia. In the existing technology, due to uneven heating, the liquid ammonia evaporator is prone to excessive noise, vibration and deformation under various loads, and its service life is very short. Excessive erosion occurs in the internal parts of the shell. Contents of the invention ...

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Problems solved by technology

[0003] The problem to be solved by the present invention is to provide an electrically heated liquid ammonia evaporator with uniform heating, so as to solve the phenomenon that the liquid ammonia evaporator is heated unevenly, which causes excessive noise, vibration and deformation under various loads, and avoids the Excessive erosion can be a problem with both inlets and housing internals

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