Granary residual nitrogen recovery and pressure swing adsorption nitrogen generation system

Abstract

The utility model discloses a granary residual nitrogen recovery pressure swing adsorption nitrogen making system which comprises a granary, a regulating valve, a flow meter, an air compressor, a pressure swing adsorption nitrogen making machine and a connecting pipeline. According to the system, gas exhausted by the granary is conveyed to an inlet of the air compressor through a pipeline and is supplied to the air compressor as a gas source, the recycled gas is lower than the rated suction capacity of the air compressor, and the insufficient gas amount is compensated by adjusting the adjusting valve. The nitrogen content in the gas entering the air compressor is larger than that in the air, so that the nitrogen content at the gas inlet end of the pressure swing adsorption nitrogen making machine is increased. According to the inherent characteristics of the carbon molecular sieve, under the condition that the pressure swing adsorption nitrogen making machine is filled with quantitative carbon molecular sieve, the nitrogen content at the gas inlet end is improved, and the yield and purity of nitrogen can be improved; under the condition that the nitrogen yield and purity are not changed, the nitrogen content of the gas inlet end is increased, and the filling amount of the carbon molecular sieve of the pressure swing adsorption nitrogen making machine can be reduced. The utilization rate of the carbon molecular sieve is increased, a certain economical effect is achieved, and the method has relatively high practicability and relatively good application prospects.

Description

Technical Field

[0001] The utility model relates to a pressure swing adsorption nitrogen making system, in particular to a granary residual nitrogen recovery pressure swing adsorption nitrogen making system. Background Art

[0002] At present, during the nitrogen filling process of the granary, the unconsumed nitrogen is directly discharged into the atmosphere, which causes waste to a certain extent. The main factor affecting the purity of nitrogen produced by the pressure swing adsorption nitrogen generator is the carbon molecular sieve filled inside the device. The gas enters the pressure swing adsorption nitrogen generator and is deoxygenated by the carbon molecular sieve to obtain high-purity nitrogen; the more nitrogen content in the intake air of the pressure swing adsorption nitrogen generator, the less the consumption of carbon molecular sieve, and the higher the purity of the obtained nitrogen. This requires a method to increase the nitrogen content of the intake air of the pressure swing adsorption nitrogen generator. Summary of the invention

[0003] The purpose of the utility model is to recycle the nitrogen discharged from the granary, increase the nitrogen content at the air inlet end of the pressure swing adsorption nitrogen making device; in the case of filling a quantitative carbon molecular sieve, increase the nitrogen content at the air inlet end of the pressure swing adsorption nitrogen making machine, and further increase the nitrogen output and purity; in the case of unchanged nitrogen output and purity, increase the nitrogen content at the air inlet end of the pressure swing adsorption nitrogen making machine, and further reduce the filling amount of the carbon molecular sieve of the pressure swing adsorption nitrogen making machine. This system recycles the nitrogen discharged from the granary, while improving the utilization rate of the carbon molecular sieve, achieving a certain economic effect, and has strong practicality and good application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0004] Figure 1 It is a schematic diagram of the utility model. DETAILED DESCRIPTION

[0005] The present invention is further described below with reference to the accompanying drawings and embodiments, but is not intended to be limiting of the present invention.

[0006] See also Figure 1 As shown, the utility model provides a granary residual nitrogen recovery pressure swing adsorption nitrogen making system, the structure of which includes: a granary (1), a regulating valve (2), a flow meter (3), an air compressor (4), a pressure swing adsorption nitrogen making machine (5) and a connecting pipeline. The granary (1), the air compressor (4) and the pressure swing adsorption nitrogen making machine (5) are connected by a pipeline to form a closed loop. The gas discharged from the granary (1) is transported to the inlet of the air compressor (4) through the pipeline and provided to the air compressor (4) as a gas source. The opening of the regulating valve (2) is adjusted to compensate for the air intake of the air compressor (4) so ​​that the flow monitored by the flow meter (3) is equal to the rated air intake of the air compressor (4). The nitrogen content in the gas entering the air compressor (4) is greater than the nitrogen content in the air, and the gas is compressed by the air compressor (4) and enters the pressure swing adsorption nitrogen making machine (5), thereby increasing the nitrogen content at the air intake end of the pressure swing adsorption nitrogen making machine (5).

[0007] Furthermore, according to the inherent characteristics of the carbon molecular sieve, when the pressure swing adsorption nitrogen generator (5) is filled with a quantitative carbon molecular sieve, the nitrogen content at the air inlet end of the pressure swing adsorption nitrogen generator (5) is increased, thereby further improving the output and purity of the nitrogen.

[0008] Furthermore, according to the inherent characteristics of the carbon molecular sieve, the nitrogen content at the air inlet of the pressure swing adsorption nitrogen generator (5) is increased while the nitrogen production and purity remain unchanged, thereby further reducing the filling amount of the carbon molecular sieve of the pressure swing adsorption nitrogen generator (5).

[0009] The above is an embodiment of the present invention, and does not limit the scope of the patent application of the present invention. All equivalent structural changes made using the description and illustrations of the present invention are included in the protection scope of the present invention.

Claims

1. A granary residual nitrogen recovery pressure swing adsorption nitrogen production system, comprising: A granary (1), a regulating valve (2), a flow meter (3), an air compressor (4), and a pressure swing adsorption nitrogen generator (5), characterized in that the nitrogen generated by the pressure swing adsorption nitrogen generator (5) enters the granary (1), the nitrogen contained in the gas discharged from the granary (1) is collected and transported to the inlet of the air compressor (4) through a pipeline as a gas source for the air compressor (4), thereby increasing the nitrogen content at the air inlet end of the air compressor (4), further increasing the nitrogen content at the air inlet end of the pressure swing adsorption nitrogen generator (5), and improving the utilization rate of the carbon molecular sieve.

2. A granary residual nitrogen recovery pressure swing adsorption nitrogen production system according to claim 1, characterized in that: The granary (1), the air compressor (4), and the pressure swing adsorption nitrogen generator (5) are connected via pipelines to form a closed loop.

3. A granary residual nitrogen recovery pressure swing adsorption nitrogen production system according to claim 1, characterized in that: A regulating valve (2) and a flow meter (3) are installed on the inlet pipelines of the granary (1) and the air compressor (4) to monitor the gas flow in the pipelines, adjust the opening of the regulating valve (2), and perform gas volume compensation on the air intake end of the air compressor (4) to meet the air intake volume requirements of the air compressor.

4. A granary residual nitrogen recovery pressure swing adsorption nitrogen production system according to claim 1, characterized in that: According to the inherent characteristics of the carbon molecular sieve, when the pressure swing adsorption nitrogen generator (5) is filled with a quantitative carbon molecular sieve, the nitrogen content at the air inlet end of the pressure swing adsorption nitrogen generator (5) is increased, thereby further improving the output and purity of the nitrogen.

5. The granary residual nitrogen recovery pressure swing adsorption nitrogen production system according to claim 1 is characterized by: According to the inherent characteristics of carbon molecular sieve, the nitrogen content at the air inlet end of the pressure swing adsorption nitrogen generator (5) is increased while the nitrogen production and purity remain unchanged, thereby further reducing the filling amount of the carbon molecular sieve of the pressure swing adsorption nitrogen generator (5).

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