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Low-energy-consumption device and method capable of producing oxygen-enriched gas and high-purity nitrogen simultaneously

An oxygen-enriched gas and low energy consumption technology, which is applied in refrigeration and liquefaction, lighting and heating equipment, liquefaction, etc., can solve the problems of energy waste and increase production costs, and achieve energy consumption reduction, energy conservation, significant economic benefits and social benefits benefit effect

Pending Publication Date: 2017-07-28
HENAN KAIYUAN AIR SEPARATION GRP CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This has just caused the waste of energy, increased production cost at the same time
In addition, the raw material of the cryogenic air separation method is air, and its main consumption is energy. In the case of increasingly tight energy sources, how to reduce the energy consumption of the cryogenic air separation method has become an urgent problem to be solved

Method used

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  • Low-energy-consumption device and method capable of producing oxygen-enriched gas and high-purity nitrogen simultaneously

Examples

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Comparison scheme
Effect test

Embodiment 1

[0031] See figure 1 , The present invention is a device for simultaneously producing oxygen-enriched gas and high-purity nitrogen with low energy consumption. The device includes an air compression system 1, an air pre-cooling system 2, a molecular sieve purification system 3, a turbo-expander 4, and a main exchange Heater 5, rectification tower and subcooler 9; the air compression system, air pre-cooling system and molecular sieve purification system are conventional air compression systems, air pre-cooling systems and molecular sieve purification systems in the field; the rectification tower Including the upper tower 6, the lower tower 7, and the main condensation evaporator 8 located between the upper tower and the lower tower. The main condensation evaporator 8 includes an upper main condensation evaporator K1 and a lower main condensation evaporator K2. The upper main condensation evaporator K1 and the lower main condensing evaporator K2 are separated by a partition board,...

Embodiment 2

[0037] See figure 1 The content of Example 2 is basically the same as that of Example 1, except that the upper tower and the lower tower are both sieve trays.

Embodiment 3

[0039] See figure 1 , A method for simultaneously producing oxygen-enriched gas and high-purity nitrogen using the device described in Example 1, the method comprising the following steps:

[0040] a. The air from the atmosphere sequentially passes through the air compression system, the air pre-cooling system and the molecular sieve purification system are filtered, compressed, and purified to remove moisture and carbon dioxide from the air to obtain purified dry air. The dry air is divided into two parts. One way, one way enters the turboexpander through 101 pipe, and the other way enters the main heat exchanger through 102 pipe;

[0041] b. After the dry air entering the turboexpander is pressurized in the turboexpander, it enters the main heat exchanger through the 103 pipe for cooling, and the cooled dry air enters the turbocharger through the 201 pipe for expansion. The expansion end of the machine performs expansion and refrigeration, and the expanded dry air enters the upp...

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Abstract

The invention provides a device capable of producing oxygen-enriched gas and high-purity nitrogen simultaneously. The device comprises an air compression system, an air precooling system, a molecular sieve purification system, a booster expansion turbine, a main heat exchanger, a rectifying column and a supercooler. All the devices communicate with one another through corresponding pipelines. The invention further provides a method capable of producing the oxygen-enriched gas and the high-purity nitrogen simultaneously. In specific, air in the atmosphere is divided into two paths after being filtered, compressed and purified; one path of the air enters the booster expansion turbine and then enters an upper column body for rectification separation after passing through the main heat exchanger; and the other path of the air directly enters the main heat exchanger to be cooled and then enters a lower-layer main condensing evaporator and a lower column body in sequence, primary rectification separation is carried out in the lower column body, and then the air enters the upper column body to conduct final rectification separation. By the adoption of the device and method, the oxygen-enriched gas of different purities can be produced while the high-purity nitrogen is produced, the oxygen-enriched gas can be directly used by follow-on production, repeated construction and investment of equipment are reduced, and the production cost is also reduced.

Description

Technical field [0001] The invention belongs to the technical field of gas separation methods and devices, and particularly relates to a device and method for simultaneously producing oxygen-rich gas and high-purity nitrogen with low energy consumption. Background technique [0002] Oxygen as a combustion-supporting agent and oxidant is an important raw material for industrial production today. It is widely used in coal chemical industry, steel, fertilizer, non-ferrous smelting and other fields. Using pure oxygen or enriched oxygen not only effectively reduces exhaust gas emissions, but also reduces energy loss and saves raw material costs. [0003] At present, there are two main methods for industrial oxygen production: cryogenic air separation and pressure swing adsorption. Cryogenic air separation is generally used in large-scale equipment. It has the characteristics of high oxygen product purity and good equipment stability. It can produce nitrogen and by-products such as liq...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25J3/04F25J5/00
CPCF25J3/04018F25J3/04084F25J3/0409F25J3/04424F25J5/00F25J2215/40F25J2215/44F25J2210/40F25J3/04884F25J3/04206F25J3/04303F25J3/04412F25J2240/46F25J2245/50F25J2250/40F25J2250/50F25J2250/02F25J2250/10
Inventor 贾军张世田孙兴力彭明扬
Owner HENAN KAIYUAN AIR SEPARATION GRP CO LTD
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