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High-pressure liquid ammonia pressure energy recovery process and recovery system

A technology of recovery system and pressure energy, applied in steam engine installations, machines/engines, mechanical equipment, etc., can solve problems such as shortage and waste, and achieve the effect of high power generation efficiency

Inactive Publication Date: 2016-05-04
BEIJING ZHONGKE RUIAO ENERGY TECH CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually, the high-pressure liquid ammonia separated from the syngas has a lot of heat and pressure energy, and the prior art lacks the means to effectively utilize it, resulting in great waste

Method used

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  • High-pressure liquid ammonia pressure energy recovery process and recovery system
  • High-pressure liquid ammonia pressure energy recovery process and recovery system
  • High-pressure liquid ammonia pressure energy recovery process and recovery system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] like figure 1 , figure 2 As shown, the embodiment of the high-pressure liquid ammonia pressure energy recovery system of the present invention includes:

[0038] A first heater E1 for heating liquid ammonia;

[0039] The second heater E3 for reheating the liquid ammonia heated by the first heater E1 to turn the liquid ammonia into ammonia gas is connected to the first heater E1 through a pipeline;

[0040] The expander ET1 used to expand and lower the temperature and pressure of the ammonia gas is connected to the second heater E3 through a pipeline;

[0041] The work device M is connected with the output shaft of the expander ET1 to use ammonia to do work;

[0042] The cooling equipment E2 used to cool the ammonia gas after expansion, temperature reduction and pressure reduction to make the ammonia gas into liquid ammonia is connected with the expander ET1 through pipelines.

[0043] Embodiment one utilizing the high-pressure liquid ammonia pressure energy recover...

Embodiment 2

[0052] The difference between this embodiment and Embodiment 1 lies in the difference of the cooling equipment. In this embodiment, the first heater and the second heater are electric heaters, and the structures of the first heater and the second heater are the same. The heating temperature of the heater is lower than that of the second heater.

[0053] like image 3 As shown, the first heater includes a heat exchange cavity 60 and a plurality of heating resistors 61 extending into the heat exchange cavity 60. The ammonia delivery pipeline for transporting liquid ammonia passes through the heat exchange cavity 60 to utilize the heat exchange cavity The heating resistor 61 inside the body 60 heats the liquid ammonia.

Embodiment 3

[0055]The difference between this embodiment and Embodiment 1 lies in the difference of the cooling equipment. In this embodiment, the cooling equipment includes a cold box, a refrigerant compressor, and a throttle valve. Compressed refrigerant, the refrigerant is throttled and cooled by the throttle valve, and then transported to the refrigerant compressor through the second pipeline, through the first pipeline and the second pipeline, the refrigerant flows between the refrigerant compressor and the throttle valve The first pipeline and the second pipeline pass through the cold box respectively, and the cold box and the expander are connected through pipelines, so that the ammonia gas becomes liquid ammonia after cooling, and the refrigerant in the first pipeline is in the cold box Cooling, the refrigerant in the second line provides cooling in the cold box.

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Abstract

The invention discloses a high-pressure liquid ammonia pressure energy recovery process and recovery system, wherein the high-pressure liquid ammonia pressure energy recovery system comprises a first heater, a second heater connected with the first heater through a pipeline, an expander connected with the second heater through a pipeline, and work equipment connected with an output shaft of the expander and doing work by utilizing ammonia gas. The high-pressure liquid ammonia pressure energy recovery process comprises first heating to liquid ammonia, second heating to liquid ammonia after first heating to convert liquid ammonia into ammonia gas, performing expansion, temperature lowering and pressure reduction treatment on ammonia gas, doing work by utilizing ammonia gas, and cooling ammonia gas after the expansion, temperature lowering and pressure reduction treatment to convert ammonia gas into liquid ammonia. The technical scheme provided by the invention has the advantages that low-grade waste heat in a factory can be effectively utilized, an electric generator is driven by the expander to generate electricity, the electricity generating efficiency is high, and the purposes of saving energy and protecting environment are achieved.

Description

technical field [0001] The invention relates to the field of recovery and utilization of pressure energy and heat, in particular to a process and system for recovering pressure energy of high-pressure liquid ammonia. Background technique [0002] Ammonia has many uses. Using ammonia as raw material can produce a variety of nitrogen fertilizers, such as urea, ammonium sulfate, ammonium nitrate, ammonium bicarbonate, etc., and can also produce a variety of compound fertilizers, such as phosphate fertilizers. Ammonia is also an important industrial raw material, which can participate in the formation of nitric acid, soda ash and various nitrogen-containing inorganic salts. [0003] The raw materials for ammonia synthesis are hydrogen and nitrogen. In the ammonia synthesis process, according to the operating pressure, it can be divided into high-pressure method, medium-pressure method and low-pressure method. Due to the technical and economic advantages of the medium-pressure...

Claims

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Application Information

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IPC IPC(8): F01K25/10
CPCF01K25/106
Inventor 侯国建马文亮徐小勤张正军张斌董激烈杨博云罗飙索亮亮吕玉康
Owner BEIJING ZHONGKE RUIAO ENERGY TECH CO LTD