阅读说明：本技术 一种无氧干燥系统及其干燥方法 (Anaerobic drying system and drying method thereof ) 是由 刘杰 柏嵩 王伟 丁宇 于 2020-05-26 设计创作，主要内容包括：本发明提供了一种无氧干燥系统及其干燥方法,无氧干燥系统包括干燥罐、粗抽工位和精抽工位；所述干燥罐连接粗抽工位或精抽工位；所述干燥罐通过快速自封接头与粗抽工位或精抽工位连接。干燥罐用于盛装待干燥的产品,粗抽工位用于干燥预处理,快速去除干燥罐中的液态水分；精抽工位用于完全干燥产品,使得干燥罐中的水氧含量满足使用要求。干燥过程中全程监测干燥罐的真空度,及时发现干燥罐漏气等导致产品失效的问题。便于实现自动化生产,提高了产品的干燥效率,保证了产品质量。(The invention provides an anaerobic drying system and a drying method thereof, wherein the anaerobic drying system comprises a drying tank, a rough pumping station and a fine pumping station; the drying tank is connected with the rough pumping station or the fine pumping station; the drying tank is connected with the rough pumping station or the fine pumping station through a quick self-sealing joint. The drying tank is used for containing a product to be dried, and the rough pumping station is used for drying pretreatment to quickly remove liquid water in the drying tank; the fine pumping station is used for completely drying the product, so that the oxygen content of water in the drying tank meets the use requirement. The vacuum degree of the drying tank is monitored in the whole drying process, and the problem of product failure caused by air leakage of the drying tank and the like is found in time. The automatic production is convenient to realize, the drying efficiency of the product is improved, and the product quality is ensured.)

1. An oxygen-free drying system is characterized by comprising a drying tank, a rough pumping station and a fine pumping station; the drying tank is connected with the rough pumping station or the fine pumping station; the rough pumping station comprises a gas buffer pipeline and a dry pump vacuum pumping pipeline; the gas buffer pipeline and the dry pump vacuum pumping pipeline are both connected with the drying tank; a gas buffer tank is arranged on the gas buffer pipeline; a high-pumping-speed dry vacuum pump is arranged on the dry vacuum pumping pipeline; the fine pumping station comprises a fine pumping pipeline; the fine pumping pipeline is connected with the drying tank; the fine pumping pipeline is provided with a double-rotor vacuum pump.

2. The anaerobic drying system of claim 1, wherein a nitrogen pressure regulating valve and a first vacuum solenoid valve are arranged on a gas buffer pipeline between the gas buffer tank and the gas inlet; a pressure sensor and a second vacuum solenoid valve are arranged on a gas buffer pipeline between the gas buffer tank and the drying tank; and a first vacuum degree sensor and a water content sensor are arranged on a dry-type pumping pipeline between the high-pumping-speed dry vacuum pump and the drying tank.

3. The anaerobic drying system of claim 1, wherein a second vacuum degree sensor is disposed on the fine pumping pipeline between the double-rotary-vane vacuum pump and the drying tank.

4. The anaerobic drying system as claimed in claim 1, wherein a third vacuum solenoid valve is provided on the drying tank; and the third vacuum solenoid valve is connected with a dry-type pump vacuum pumping pipeline or a fine pumping pipeline.

5. The anaerobic drying system of claim 1, wherein an electric heater is disposed in the gas buffer tank; the high-pumping-speed dry vacuum pump is connected with a cooling circulating water pump.

6. An oxygen-free drying process, characterized in that the process comprises:

sequentially vacuumizing the drying tank and injecting nitrogen through a rough pumping station;

putting the product into a drying tank filled with nitrogen and continuously filling the nitrogen;

closing and locking the tank door of the drying tank after nitrogen is injected, and completing the product filling process;

after the product is filled, evacuating gas and liquid water in the drying tank by a high-evacuation-speed dry vacuum pump;

injecting hot nitrogen into the drying tank for pumping air and liquid moisture;

repeating the processes of vacuumizing by the high-pumping-speed dry vacuum pump and injecting hot nitrogen for multiple times to finish the rough pumping procedure;

and after the rough pumping process is finished, the drying tank is connected to the fine pumping station through the quick self-sealing joint, and the product drying is finished through the fine pumping station.

Technical Field

The invention relates to the technical field of drying, in particular to an anaerobic drying system and a drying method thereof.

Background

Alloy foils which are processed and produced in aqueous solution in the industries of chemical engineering, electronics and the like are often involved, the foils have the characteristics of easy oxidation, water absorption and high-temperature failure, and oxygen-free drying treatment is needed after the processing is finished. The conventional treatment method is that a batch of wet foils are placed in a drying container, the surface of the drying container is moderately heated, the drying container is vacuumized to remove moisture and oxygen in the drying container, then the drying container is conveyed to an oxygen-free environment to take out the foils, and the performance of the foils is sampled and detected. The conventional implementation has the following obvious disadvantages: 1) the wet foils are mutually adhered, so that the moisture is not easy to volatilize; 2) because the foils have the characteristic of high-temperature failure, the surfaces of the drying containers can be only moderately heated, and the effect of accelerating the volatilization of liquid moisture among wet foils is limited; 3) product failure caused by air leakage in the drying process cannot be found in time and can be processed in subsequent detection.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide an oxygen-free drying system and a drying method thereof, so as to solve the problem that moisture is not easy to volatilize in the prior art.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

an anaerobic drying system comprises a drying tank, a rough pumping station and a fine pumping station; the drying tank is connected with the rough pumping station or the fine pumping station; the rough pumping station comprises a gas buffer pipeline and a dry pump vacuum pumping pipeline; the gas buffer pipeline and the dry pump vacuum pumping pipeline are both connected with the drying tank; a gas buffer tank is arranged on the gas buffer pipeline; a high-pumping-speed dry vacuum pump is arranged on the dry vacuum pumping pipeline; the fine pumping station comprises a fine pumping pipeline; the fine pumping pipeline is connected with the drying tank; the fine pumping pipeline is provided with a double-rotor vacuum pump.

Further, a nitrogen pressure regulating valve and a first vacuum solenoid valve are arranged on a gas buffer pipeline between the gas buffer tank and the gas inlet; a pressure sensor and a second vacuum solenoid valve are arranged on a gas buffer pipeline between the gas buffer tank and the drying tank; and a first vacuum degree sensor and a water content sensor are arranged on a dry-type pumping pipeline between the high-pumping-speed dry vacuum pump and the drying tank.

Furthermore, a second vacuum degree sensor is arranged on a fine pumping pipeline between the double-rotary-vane vacuum pump and the drying tank.

Further, a third vacuum electromagnetic valve is arranged on the drying tank; and the third vacuum solenoid valve is connected with a dry-type pump vacuum pumping pipeline or a fine pumping pipeline.

Further, an electric heater is arranged in the gas buffer tank; the high-pumping-speed dry vacuum pump is connected with a cooling circulating water pump.

An oxygen-free drying process, the process comprising:

sequentially vacuumizing the drying tank and injecting nitrogen through a rough pumping station;

putting the product into a drying tank filled with nitrogen and continuously filling the nitrogen;

closing and locking the tank door of the drying tank after nitrogen is injected, and completing the product filling process;

after the product is filled, evacuating gas and liquid water in the drying tank by a high-evacuation-speed dry vacuum pump;

injecting hot nitrogen into the drying tank for pumping air and liquid moisture;

repeating the processes of vacuumizing by the high-pumping-speed dry vacuum pump and injecting hot nitrogen for multiple times to finish the rough pumping procedure;

and after the rough pumping process is finished, the drying tank is connected to the fine pumping station through the quick self-sealing joint, and the product drying is finished through the fine pumping station.

Compared with the prior art, the invention has the following beneficial effects:

according to the invention, a rough pumping station is adopted to complete drying pretreatment, and the rough pumping station is mainly used for quickly removing moisture and oxygen in the drying tank so as to meet the requirements of the next fine pumping station; and finishing the drying of the product by adopting a fine pumping station to ensure that the water oxygen content of the product meets the technical requirement. Through the separation of the rough pumping station and the fine pumping station, the automatic production is easy to realize, and the drying efficiency of the product is improved; meanwhile, the vacuum degree of the drying tank is monitored in the whole drying process, the water oxygen content in the tank is indirectly reflected through the vacuum degree, the problem of product failure caused by air leakage and the like of the drying tank is timely found, and the product quality is guaranteed.

Drawings

FIG. 1 is a block diagram of the overall architecture of the anaerobic drying system of the present invention;

FIG. 2 is a schematic view of another embodiment of the present invention;

FIG. 3 is a flow chart of the operation of the gas buffer section of the present invention;

FIG. 4 is a flow chart of the operation of the rough draw station of the present invention;

FIG. 5 is a flow chart of the operation of the finishing station of the present invention.

Reference numerals: 100-nitrogen pressure regulating valve; 110-a first vacuum solenoid valve; 120-an electric heater; 130-gas buffer tank; 140-a pressure sensor; 150-a second vacuum solenoid valve; 210-a drying tank; 220-third vacuum solenoid valve; 310-a first vacuum level sensor; 320-a water content sensor; 330-high pumping speed dry vacuum pump; 340-cooling circulating water pump; 420-double-rotary-vane vacuum pump; 410-second vacuum level sensor.

Detailed Description

The present invention will be described in further detail in order to make the objects, technical solutions and advantages of the present invention more apparent. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

First, the reason why the conventional technology affects the drying efficiency is that: firstly, because the foil has the characteristic of high-temperature failure, the drying container can be only moderately heated, the temperature is generally controlled within 200 ℃, and the drying effect is limited; secondly, the heat on the surface of the drying container can not be effectively transferred into the container, and particularly due to the adhesion property of wet foils, the moisture among the foils is slowly volatilized; thirdly, the index requirement of the drying effect is strict, the water oxygen content is generally required to be lower than 10ppm, the required vacuum pump is a small-capacity double-rotor vacuum pump, and the small pumping speed of the small-capacity pump needs a long time to meet the use requirement; fourth, additional drying equipment needs to be added between the drying container and the vacuum pump, and the drying equipment needs to be replaced frequently, which is time-consuming.

Secondly, because the water oxygen content is extremely low in the environment close to vacuum, the existing water oxygen sensor cannot reliably monitor, so that the traditional technology does not carry out on-line monitoring on the drying process, only after the drying is finished, the drying container is conveyed to an anaerobic environment to take out the foil, the performance of the foil is sampled and detected, and the product failure caused by air leakage in the drying process can be found only when the sampling detection is carried out.

In order to solve the problems in the prior art, the anaerobic drying system and the drying method thereof provided by the invention have the advantages that the anaerobic drying efficiency is improved by arranging the rough pumping station and the fine pumping station, and the automatic production is easier to realize; on the other hand, the water oxygen content of the drying environment is indirectly reflected through the online monitoring of the vacuum degree, the problems in the drying process can be found in time, and the detection efficiency and the product performance are improved.