Low-dew-point nitrogen generation system

Abstract

The utility model discloses a low dew point nitrogen generating system which comprises an air compressor, an air inlet filter, a cold drying and water removing mechanism, an adsorption type drying machine and an air storage tank, the air inlet filter is installed at an air inlet of the air compressor, and an air outlet of the air compressor is connected with the cold drying and water removing mechanism through a pipeline. The cold drying and water removing mechanism comprises a radiator and a heat exchanger which are connected in series through a pipeline, the pipeline led out of the air compressor is connected into the radiator, the radiator is connected with the heat exchanger through a pipeline, the heat exchanger is connected into the adsorption type drying machine through a pipeline, the adsorption type drying machine is connected with the air storage tank through a pipeline, and all the pipelines are metal pipelines. Joints at two ends of the pipeline are hydraulic transition joints; the system adopts a combined water removal design, performs water removal on compressed air through triple mechanisms, is high in water removal stability, can ensure the low dew point of nitrogen, and has the characteristics of high efficiency, energy conservation, convenience in operation, economy, environmental protection and the like.

Description

TECHNICAL FIELD

[0001] The utility model belongs to nitrogen equipment technical field, concretely relates to a low dew point nitrogen generation system. BACKGROUND

[0002] The nitrogen making system is the equipment that takes air as raw material, and prepares nitrogen through compression, separation and other processes, and the main reason that the nitrogen generation system requires low dew point is that the dew point directly reflects the water content in nitrogen, and the moisture may have negative effects on application scenarios. For example, in electronic manufacturing, moisture can cause component oxidation or circuit short circuit, in food packaging, moisture can accelerate food spoilage, and in the chemical industry, moisture can react with certain chemicals, affecting product quality or safety. Therefore, low dew point (usually required to be lower than -65 DEG C or even -70 DEG C) is a key indicator to ensure the dryness of nitrogen and avoid moisture-related problems.

[0003] The existing nitrogen making machine usually uses a membrane separation system for freeze drying, however, the service life of the membrane assembly is limited, and in the state of simultaneous use of multiple membranes, as long as one membrane is damaged, the other membranes also need to be replaced, and the replacement cost is very high. If dry membranes are used, the membranes will be damaged once water or oil enters, and the maintenance cost is very high. Moreover, the dew point of the membrane separation nitrogen making machine is limited, and can usually only reach 0 DEG C to -20 DEG C dew point, which is difficult to meet the requirement of ultra-low humidity, the refrigeration system has a large power consumption, the operation cost is high, and the sensitivity to the environment is also high, which is manifested as a decrease in efficiency in high-temperature environment or gas flow fluctuation, therefore, the existing nitrogen making machine needs to be improved to meet the low dew point nitrogen making requirement. UTILITY MODEL CONTENTS

[0004] In view of the above problems and technical requirements, the utility model provides a low dew point nitrogen generation system, the system adopts combined water removal design, and compressed air is removed by three mechanisms, the water removal stability is high, the low dew point of nitrogen can be guaranteed, and the system has the characteristics of high efficiency, energy saving, convenient operation, economy and environmental protection.

[0005] The technical scheme of the utility model is as follows: a low dew point nitrogen generation system, comprising an air compressor, an air inlet filter, a cold and dry water removal mechanism, an adsorption dryer and a gas storage tank, the air inlet filter is installed at the air inlet of the air compressor, the air outlet of the air compressor is connected with the cold and dry water removal mechanism through a pipeline, the cold and dry water removal mechanism comprises a radiator and a heat exchanger connected in series through a pipeline, the pipeline connected with the air compressor is connected into the radiator, the radiator and the heat exchanger are connected through a pipeline, the heat exchanger is connected into the adsorption dryer through a pipeline, the adsorption dryer is connected with the gas storage tank through a pipeline, the pipeline is a metal pipeline, and the joints at both ends of the pipeline are hydraulic overjoint.

[0006] In the above mechanism, triple water removal is used for compressed air removal, the first water removal is the removal of liquid water, the air inlet filter installed at the air inlet can filter the particulate matter, liquid water and oil mist in the air, and ensure that the air sucked into the air compressor is clean and dry; the second water removal is completed by the cold dry water removal mechanism, the radiator and heat exchanger arranged in the cold dry water removal mechanism can cool the compressed air to below the dew point temperature, so that the water vapor in the air condenses into liquid water and is discharged, further reducing the humidity of the compressed air; the third water removal is undertaken by the adsorption dryer, which uses adsorption regeneration to process compressed air, which can efficiently filter out gaseous water and oil mist in the air, greatly improving the oil content and water content of the compressed air, and meeting the low dew point requirement.

[0007] Further, the radiator is a finned radiator, and the front side of the air compressor body is provided with a heat dissipation cover shell, and the finned radiator is arranged in the heat dissipation cover shell, and the finned radiator simultaneously dissipates heat for the air compressor and the compressed air output by the air compressor.

[0008] Further, the heat exchanger is arranged above the radiator, and the inside of the heat exchanger is provided with a centrifugal fan, and the blowing port of the centrifugal fan faces the heat exchanger and blows heat away from the heat exchanger.

[0009] The cold dry water removal mechanism includes a radiator and a heat exchanger connected in series, the radiator performs preliminary heat dissipation for the air compressor and the compressed air output by the air compressor, because heat is generated during air compression, the temperature of the output compressed air is relatively high, and after part of the heat is dissipated through the radiator, the compressed air is reduced to normal temperature; the heat exchanger has a refrigeration effect and can cool the normal temperature compressed air to below the dew point temperature, so that the water vapor in the air condenses into liquid water, and after the liquid water is discharged, the water content of the compressed air is further reduced.

[0010] Further, one side of the adsorption dryer is connected to the heat exchanger through an upstream pipeline, and a compressed air filter is connected in the upstream pipeline.

[0011] Further, the other side of the adsorption dryer is connected to the gas storage tank through a downstream pipeline, and two compressed air filters are connected in series on the downstream pipeline.

[0012] Further, the compressed air filter can simultaneously filter out oil mist particles, dust particles and moisture in the compressed air.

[0013] In the third water removal, the adsorption dryer and multiple compressed air filters are used in cooperation to fully remove water, dust and oil from the compressed air, so that the filtration is more sufficient, and the compressed gas entering the gas storage tank has higher cleanliness and lower dew point.

[0014] Further, the gas tank is cylindrical, and the gas tank is transversely arranged above the air compressor, a fixed support frame is connected to the top of the gas tank, and two compressed air filters connected to the downstream pipeline are connected to the fixed support frame through sheet metal parts.

[0015] The air compressor of the utility model has the advantages that the triple water removal mechanism is used to remove water from compressed air, the air filter installed at the air inlet can filter particulate matter, liquid water and oil mist in the air, ensuring that the air sucked into the air compressor is clean and dry, the radiator pre-cools the compressed air output by the air compressor for the first time, the compressed air entering the heat exchanger is kept at a low temperature, the refrigeration efficiency of the heat exchanger is improved, the heat exchanger can cool the compressed air to below the dew point temperature, water vapor in the air is condensed into liquid water and discharged, and the humidity of the compressed air is further reduced, the third water removal adopts double filtration combination, that is, the adsorption dryer and the three compressed air filters are matched, oil mist, water vapor and dust particles in the compressed air can be efficiently adsorbed and filtered out, the dew point is reduced to a lower temperature, and the dryness is further improved, the compressed air is filtered layer by layer through the above-mentioned triple water removal mechanism, the compressed air finally entering the gas tank for storage has the characteristics of extremely low dew point and deep dryness, the compressed air can be used to prepare nitrogen with extremely low dew point, and the industrial manufacturing demand is met. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The utility model discloses a kind of connection structure of low dew point nitrogen generation system Figure 1 ;

[0017] Figure 2 The utility model discloses a kind of connection structure of low dew point nitrogen generation system Figure 2 ;

[0018] Figure 3 For the connection diagram of the cold dry water removal mechanism in the low dew point nitrogen generation system of the utility model;

[0019] In the drawing, it is marked as: air compressor 1, radiator shell 11, air filter 2, cold dry water removal mechanism 3, radiator 31, heat exchanger 32, centrifugal fan 4, adsorption dryer 5, upstream pipeline 51, downstream pipeline 52, compressed air filter 53, fixed support frame 54, sheet metal part 55, gas tank 6, metal pipeline 7, hydraulic excess joint 71. DETAILED DESCRIPTION

[0020] The utility model will be further described below in connection with the drawings and examples.

[0021] As Figures 1-3The utility model discloses a low dew point nitrogen generating system, including air compressor 1, inlet filter 2, cold dry water removal mechanism 3, adsorption dryer 5 and gas holder 6, the air inlet of air compressor 1 is installed with inlet filter 2, and the air outlet of air compressor 1 is connected with cold dry water removal mechanism 3 through pipeline.

[0022] Cold dry water removal mechanism 3 includes radiator 31 and heat exchanger 32 by pipeline series connection, the pipeline of air compressor 1 is connected to radiator 31, and radiator 31 is connected with heat exchanger 32 through pipeline, and heat exchanger 32 is connected to adsorption dryer 5 through pipeline, the radiator 31 is finned radiator, and the front side of the body of air compressor 1 is equipped with heat dissipation cover shell 11, and finned radiator 31 is arranged in heat dissipation cover shell 11, and finned radiator simultaneously radiates air compressor 1 and the compressed air output by air compressor. Heat exchanger 32 is arranged above radiator 31, and the inside of heat exchanger 32 is equipped with centrifugal fan 4, and the blowing port of centrifugal fan 4 is directed to heat exchanger 32, and heat exchanger 32 is blown and radiated.

[0023] Cold dry water removal mechanism 3 includes radiator 31 and heat exchanger 32 by pipeline series connection, the pipeline of air compressor 1 is connected to radiator 31, and radiator 31 is connected with heat exchanger 32 through pipeline, and heat exchanger 32 is connected to adsorption dryer 5 through pipeline, the radiator 31 is finned radiator, and the front side of the body of air compressor 1 is equipped with heat dissipation cover shell 11, and finned radiator 31 is arranged in heat dissipation cover shell 11, and finned radiator simultaneously radiates air compressor 1 and the compressed air output by air compressor. Heat exchanger 32 is arranged above radiator 31, and the inside of heat exchanger 32 is equipped with centrifugal fan 4, and the blowing port of centrifugal fan 4 is directed to heat exchanger 32, and heat exchanger 32 is blown and radiated.

[0024] The one side of adsorption dryer 5 is connected with heat exchanger 32 through upstream pipeline 51, and a compressed air filter 53 is connected in upstream pipeline 51. The other side of adsorption dryer 5 is connected to gas holder 6 through downstream pipeline 52, and two compressed air filters 53 are connected in series on downstream pipeline 52. The compressed air filter 53 can filter out oil mist particles, dust particles and moisture in the compressed air.

[0025] The gas holder 6 is cylindrical, and the gas holder 6 is horizontally arranged above the air compressor 1, and the gas holder 6 is connected with the fixed support frame 54, and the two compressed air filters 53 connected on the downstream pipeline 52 are connected on the fixed support frame 54 through the sheet metal part 55.

[0026] In the system, all the pipelines connected between components are metal pipelines 7, and the joints at both ends of the pipeline are hydraulic overjoint 71. The design of the metal pipe solves the problem of easy aging of the rubber pipe, and the hydraulic overjoint can be quickly sealed and inserted, which is simple to install and does not require additional glue, breaking through the disadvantages of traditional glue connection that is not easy to disassemble.

[0027] The application principle of the utility model: the utility model adopts three times water removal mechanism to remove water to compressed air, the air inlet filter 2 installed in the air inlet can filter particulate matter, liquid water and oil mist in the air, ensure that the air inhaled by the air compressor 1 is clean and dry, the radiator 31 pre-cools the compressed air output by the air compressor 1 for the first time, makes the compressed air entering the heat exchanger 32 keep lower temperature, improves the refrigeration efficiency of the heat exchanger 32, the heat exchanger 32 can cool the compressed air to below dew point temperature, makes the water vapor in the air condense into liquid water and discharge, further reduces the humidity of the compressed air, the third time water removal adopts double filtration combination, that is, the adsorption type dryer 5 and three compressed air filters 53 cooperate, can efficiently adsorb and filter the oil mist, water vapor and dust particles in the compressed air, reduce the dew point to lower temperature, further improve the dryness, through the above three times water removal mechanism, the compressed air is filtered layer by layer, the compressed air finally entering the gas storage tank and stored has the characteristics of extremely low dew point and deep dryness, the compressed air in the gas storage tank 6 can be used as raw material to prepare extremely low dew point and high purity nitrogen, meet the industrial manufacturing demand.

[0028] The above is only a few preferred embodiments of the utility model, but the protection scope of the utility model is not limited to this, any skilled person in the art can easily think of changes and replacements within the technical range disclosed by the utility model, which should be covered in the protection scope of the utility model. Therefore, the protection scope of the utility model should be limited to the protection scope of the claims.

Claims

1. A low dew point nitrogen generation system, characterized by: The air compressor, the air inlet filter, the cold dry water removal mechanism, the adsorption dryer and the gas storage tank are included, the air inlet filter is installed on the air inlet of the air compressor, the air outlet of the air compressor is connected with the cold dry water removal mechanism through a pipeline, the cold dry water removal mechanism includes a radiator and a heat exchanger connected through a pipeline, the pipeline connected with the air compressor is connected into the radiator, the radiator is connected with the heat exchanger through a pipeline, the heat exchanger is connected into the adsorption dryer through a pipeline, the adsorption dryer is connected with the gas storage tank through a pipeline, the pipelines are metal pipelines, and the joints at both ends of the pipelines are hydraulic excess joints.

2. The low dew point nitrogen generation system of claim 1, wherein: The radiator is a fin radiator, the front side of the body of the air compressor is provided with a radiator cover shell, the fin radiator is arranged in the radiator cover shell, and the fin radiator radiates the air compressor and the compressed air output by the air compressor at the same time.

3. A low dew point nitrogen generation system as claimed in claim 2, wherein: The heat exchanger is arranged above the radiator, the inside of the heat exchanger is provided with a centrifugal fan, and the blowing port of the centrifugal fan faces the heat exchanger and blows heat away from the heat exchanger.

4. The low dew point nitrogen generation system of claim 3, wherein: One side of the adsorption dryer is connected with the heat exchanger through an upstream pipeline, and a compressed air filter is connected in the upstream pipeline.

5. A low dew point nitrogen generation system as claimed in claim 4, wherein: The other side of the adsorption dryer is connected into the gas storage tank through a downstream pipeline, and two compressed air filters are connected in series on the downstream pipeline.

6. A low dew point nitrogen generation system as claimed in claim 5, wherein: The compressed air filter can filter out oil mist particles, dust particles and moisture in the compressed air at the same time.

7. A low dew point nitrogen generation system as claimed in claim 6, wherein: The gas storage tank is cylindrical, the gas storage tank is horizontally arranged above the air compressor, a fixed support frame is connected to the top of the gas storage tank, and the two compressed air filters connected on the downstream pipeline are connected to the fixed support frame through sheet metal parts.

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