Method for removing obstruction of atomizer

Abstract

The invention discloses two methods for removing clogging matters in an atomizer. One is a method for removing the clogging matters by adopting cleaning solution, which is to place one end of a nozzle of the atomizer into the cleaning solution, blow atomized airflow into the atomizer, so that the cleaning solution passes through a sampling capillary inner pipe at high speed and is dashed out from the nozzle of the atomizer under the action of negative pressure produced by high-speed airflow, thereby washing and cleaning the clogging matters in the atomizer at high speed; the other method is to adopt reverse blowing of the atomized airflow to remove the clogging matters in the atomizer, block an airflow channel on the atomizer, connect one end of the nozzle of the atomizer with an atomized airflow pipeline, and use the high-speed airflow to reversely wash the sampling capillary inner pipe of the atomizer from a nozzle end of the atomizer, thereby washing and cleaning the clogging matters in the atomizer at high speed. The methods satisfy the need of removing the clogging matters in the atomizer under the condition of smartly keeping the original connecting state, reduce the frequency of replacing the atomizer due to clogging damage, and ensure that the production cost is greatly reduced.

Description

technical field [0001] The invention relates to the field of maintenance and repair of analytical instruments, in particular to a method for efficiently and conveniently removing blockages of concentric nebulizers used in analytical instruments. Background technique [0002] The concentric pneumatic nebulizer is a key component of detection and analysis equipment, and its unique structure makes it extremely easy to be damaged due to blockage. The maximum gap between the nozzles is 0.03mm, and the blockage cannot fully and effectively contact and react with the cleaning liquid. Therefore, clearing clogging is a common problem for concentric pneumatic atomizers. Due to the diversity and complexity of samples submitted for inspection in the metallurgical industry, the concentric atomizer is most likely to be blocked by salting out or insoluble particles, which seriously affects the accuracy of the test results, or causes the atomizer to be damaged until it is scrapped (a fog ...

AI Technical Summary

Problems solved by technology

Due to the diversity and complexity of samples submitted for inspection in the metallurgical industry, the concentric atomizer is most likely to be blocked by salting out or insoluble particles, which seriously affects the accuracy of the test results, or causes the atomizer to be damaged until it is scrapped (a fog Converter about $600-800)

Concentric atomizers are mostly made of fragile silicon glass or quartz materials. The main methods for removing blockages are as follows: ① Use a special cleaning device for the atomizer, but you need to purchase expensive equipment; ② Remove the atomizer and turn the nozzle upward Knocking loosens the blockage and discharges the capillary under the action of gravity, but most of them have no effect and are easy to damage the inner tube; ③ Connect compressed air to the nozzle for back blowing, but an air compressor is required to provide a compressed air source, which is relatively difficult to implement Difficult; ④ inhale 5% hydrofluoric acid (HF) to clean, but because HF has strong toxicity, it is easy to corrode the atomizer, and the detection results of Si elements are high; ⑤ immerse the nozzle in concentrated nitric acid (HNO 3 ) and heated to above 100°C to remove, but due to the structure of the nozzle, the blockage cannot effectively contact and fully react with nitric acid, which takes too long and the removal effect is poor; ⑥Blow the solvent into the inner tube with a dropper or a washing bottle, Inability to achieve the desired effect due to insufficient pressure

All of the above cleaning methods need to disassemble the nebulizer from the instrument. If it is disassembled or installed improperly, it will easily damage the nozzle or capillary inner tube, so it has many disadvantages.

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