Liquid ammonia evaporation device capable of recovering energy and method

Abstract

The invention belongs to a liquid ammonia evaporation device capable of recovering energy and a method. The liquid ammonia evaporation device comprises a liquid ammonia inlet pipeline and a gas ammonia buffer tank, wherein the liquid ammonia inlet pipeline is connected with a first-stage liquid ammonia ejector arranged at the bottom of an evaporator sequentially through a first pressure transmitter, a liquid ammonia regulating valve, a liquid ammonia flowmeter, a liquid turbine and a second pressure transmitter; the liquid turbine is provided with a high-speed variable frequency electric generator; an outlet of the first-stage liquid ammonia ejector is connected with a bottom inlet of a gas collecting device arranged at the middle upper part of the evaporator through the pipe stroke of a second-stage evaporator arranged at the middle part of the evaporator; a top outlet of the gas collecting device is connected with a pipe stroke inlet of a third-stage evaporator arranged at the upper part of the evaporator; a pipe stroke outlet of the third-stage evaporator is connected with the gas ammonia buffer tank. The liquid ammonia evaporation device has the advantages that the structure is simple and reliable; the operation and the control are convenient; the energy consumption is reduced; on the premise of greatly improving the liquid ammonia gasification rate, the phenomena of incomplete gasification and liquid existence in gas ammonia are reduced.

Description

technical field [0001] The invention belongs to the technical field of liquid ammonia energy recovery and liquid ammonia segmental evaporation, and in particular relates to a liquid ammonia evaporation device and method capable of recovering energy. Background technique [0002] With the rapid development of modern industry, the corresponding energy problems are becoming more and more prominent. While looking for new energy sources, all walks of life are also researching and developing energy-saving and consumption-reducing projects. Heat exchanger is an important unit of equipment in chemical, petroleum and other industries, and has a wide range of applications. Therefore, the strengthening of heat transfer technology can not only save energy, but also greatly save investment costs, which is of great significance to the sustainable development of enterprises. [0003] With the development of science and production technology, various heat exchangers emerge in an endless str...

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Problems solved by technology

[0003] With the development of science and production technology, various heat exchangers emerge in an endless stream. Shell-and-tube heat exchangers are widely used in various industries because of their simple manufacture, high reliability, and low cost. The commonly used heat exchanger is the kettle type, which is not satisfactory in terms of heat transfer efficiency and material consumption. Therefore, how to improve heat transfer efficiency and reduce consumption under the same equipment and material consumption has become the cut-in point for the optimization of shell-and-tube liquid ammonia heat exchangers. point

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