Method for removing atomizer obstructions

Abstract

The invention discloses two methods for removing concentric atomizer obstructions. One method is to remove the atomizer obstructions by using cleaning solution and comprises the following steps of: placing one end of a nozzle of the atomizer into the cleaning solution; blowing atomized air flow into the atomizer to allow the cleaning solution to pass through an inner sample introduction capillary tube at a high speed under the negative pressure effect produced by the high-speed air flow and flushing out from the nozzle of the atomizer so as to wash at a high speed and remove the obstructions in the atomizer; and the other method is to remove the obstructions in the atomizer by blowing back the atomized air flow and comprises the following steps of: blocking an air flow passage on the atomizer; connecting one end of the nozzle of the atomizer with an atomized air flow pipeline; back-flushing the inner sample introduction capillary tube of the atomizer with high-speed air flow from the nozzle end of the atomizer; and washing at the high speed and removing the obstructions in the atomizer. The method meets the requirements of removing the obstructions in the atomizer under the condition of skillfully keeping the original connection state of the atomizer. The frequency for continuously replacing the atomizer damaged due to blockage is reduced. The production cost is greatly reduced.

Description

[0001] The present invention is a divisional application with the application number "200910146295.2", and the application date is "2009.6.30" [0002] Priority date: "2008.7.1", priority application number: "200810131867.5" [0003] Invention title "A method for clearing the blockage of the nebulizer" technical field [0004] 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 [0005] 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. Especially ...

AI Technical Summary

Problems solved by technology

Especially in the field of metallurgical analysis, due to the diversity, complexity, difficulty of digestion, and easy hydrolysis of the samples submitted for inspection in the metallurgical industry, it is often necessary to digest samples by high-temperature melting of alkaline fluxes, which will inevitably produce many samples such as test solution. Unfavorable factors such as high salt concentration and unmelted sample residues that easily lead to nebulizer blockage

Concentric nebulizers are easily clogged due to salting out or insoluble particles, which may affect the accuracy of test results in severe cases, or cause damage to the nebulizer until it is scrapped (a nebulizer is about 600-800 US dollars)

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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