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Nitrogen preparing device having with refrigerating unit single tower, and method

A refrigerating unit and single-tower technology, applied in cold treatment separation, refrigeration and liquefaction, liquefaction, etc., can solve the problems of low working efficiency of the device, low degree of air liquefaction, nitrogen and liquid nitrogen output not meeting the predetermined requirements, etc.

Pending Publication Date: 2020-10-23
杭州杭氧低温液化设备有限公司
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  • Abstract
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Problems solved by technology

The raw material air is separated at low temperature in the rectification tower to obtain high-concentration nitrogen and then condensed to obtain liquid nitrogen products. However, when the temperature of the raw air entering the rectification tower does not reach the level of air liquefaction (or the degree of air liquefaction is low), nitrogen, The output of liquid nitrogen does not meet the predetermined requirements, resulting in low efficiency of the device

Method used

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  • Nitrogen preparing device having with refrigerating unit single tower, and method

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Embodiment Construction

[0013] The present invention will be described in detail below in conjunction with accompanying drawing: figure 1 As shown, a single-tower nitrogen-generating device with a refrigerating unit includes an air filter AF to send filtered air to a turbo air compressor TC through a pipeline 01, and the turbo air compressor TC pressurizes the air It is sent to the pre-cooling unit RU through the pipeline 02, and then sent to the molecular sieve purifier group MS through the pipeline 03 to remove the moisture in the air, CO 2 、C 2 h 2 After the harmful impurities are adsorbed, it enters the supercharging end of the high-temperature expander ET1 through the pipeline 04 for supercharging. After the supercharging, it is cooled by the cooler WE in the pipeline 05 and sent to the main heat exchanger E1, and then reaches the refrigeration unit YU through the pipeline 06. After the air enters the main heat exchanger E1 again through the pipeline 07, it is divided into two paths, and one p...

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Abstract

The invention relates to a nitrogen preparing device having with a refrigerating unit single tower, and a method. The nitrogen preparing device having with a refrigerating unit single tower comprisesa self-cleaning type air cleaner, a turbine air compressor, an air precooling unit, a molecular sieve purifier group, a high temperature turbine expander, a cooler, a main heat exchanger, a refrigerating unit, a rectifying tower, a condenser evaporator, a low temperature turbine expander, a subcooler and an electric heater, and also comprises a method for preparing nitrogen and liquid nitrogen. The temperature of an inlet end of the expander is reduced through the refrigerating unit, the heat exchange properties of the main heat exchanger are increased, the situation that the temperature of air entering the rectifying tower is reduced to preset requirements is guaranteed, and the air separation effect of the rectifying tower and the liquid nitrogen production efficiency of the condenser evaporator are guaranteed to reach preset requirements.

Description

technical field [0001] The invention relates to a single-tower nitrogen production device with a refrigeration unit and a method thereof, belonging to the technical field of air separation devices. Background technique [0002] Nitrogen products play an important role in industrial production and manufacturing. With the development of society, the demand for nitrogen and liquid nitrogen products is also increasing. How to improve the production efficiency of nitrogen and liquid nitrogen products is particularly important. The raw material air is separated at low temperature in the rectification tower to obtain high-concentration nitrogen and then condensed to obtain liquid nitrogen products. However, when the temperature of the raw air entering the rectification tower does not reach the level of air liquefaction (or the degree of air liquefaction is low), nitrogen, The output of liquid nitrogen did not meet the predetermined requirements, resulting in low working efficiency ...

Claims

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Application Information

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IPC IPC(8): F25J3/04F25J5/00
CPCF25J3/04018F25J3/04242F25J3/044F25J3/04624F25J5/00F25J2210/40F25J2215/42F25J3/04284F25J3/04345F25J3/04393F25J3/0423F25J3/04224F25J3/04278F25J2270/90
Inventor 周涛罗明辉任力飞周杰
Owner 杭州杭氧低温液化设备有限公司
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