Cleaning method using uniformly and stably jet cleaning agent formed by separately using liquid carbon dioxide or mixing liquid carbon dioxide and compressed gas

A technology of liquid carbon dioxide and compressed gas, applied in the cleaning method using liquid, the cleaning method using gas flow, chemical instruments and methods, etc., can solve the problems of high price of dry ice granulator, unbearable equipment investment and high cost , to achieve the effect of uniform and stable injection, low cost, and elimination of loss

Inactive Publication Date: 2012-07-04
上海鸣华化工科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0016] 3. The dry ice granulator is expensive, with millions of imported and 500,000 domestically produced. It is difficult to bear the investment in general enterprise equipment
In

Method used

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  • Cleaning method using uniformly and stably jet cleaning agent formed by separately using liquid carbon dioxide or mixing liquid carbon dioxide and compressed gas
  • Cleaning method using uniformly and stably jet cleaning agent formed by separately using liquid carbon dioxide or mixing liquid carbon dioxide and compressed gas
  • Cleaning method using uniformly and stably jet cleaning agent formed by separately using liquid carbon dioxide or mixing liquid carbon dioxide and compressed gas

Examples

Experimental program
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Effect test

Embodiment 1

[0071] Unit: Yuanqing Aluminum (China) Co., Ltd. (Japanese-funded enterprise)

[0072] Location: Die-casting workshop of Yuanjing Aluminum Co., Ltd., Kunshan City, Jiangsu Province

[0073] Cleaning object: on-line cleaning of release agent for die-casting molds with upper and lower molds.

[0074] Cleaning conditions: Under ambient conditions (0°C, atmospheric pressure), liquid carbon dioxide is transported at a temperature of 0°C and a pressure of 60 Bar; the flow rate of the liquid carbon dioxide is 0.2kg / min; the flow rate of compressed air is 3-5M 3 / min, the pressure is 0.5~0.7mpa; the liquid carbon dioxide is depressurized to 5Bar through the liquid decompression area of ​​the spray gun, and then mixed with compressed air evenly and stably, and then sprayed on the cleaning object. The spray speed is 320 m / s, and the spray flow rate is 0.2 liters of liquid carbon dioxide and 4 cubic meters of compressed air per minute.

[0075] Comparative effect: Compared with sandbla...

Embodiment 2

[0081]Unit: Sachs Auto Parts Systems (Shanghai) Co., Ltd.

[0082] Location: Shanghai Minghua Chemical Technology Co., Ltd. (warehouse)

[0083] Cleaning object: dirt cleaning on the surface of shock absorbers of high-speed trains.

[0084] Cleaning conditions: Under room temperature (15°C, atmospheric pressure), liquid carbon dioxide is transported at a temperature of -20°C and a pressure of 40 Bar; the flow rate of the liquid carbon dioxide is 0.5kg / min; the flow rate of compressed air is 3-5M 3 / min, the pressure is 0.5~0.7mpa; the liquid carbon dioxide is depressurized to 5Bar through the liquid depressurization area of ​​the spray gun, and then mixed with compressed air evenly and stably, and then sprayed on the cleaning object. The spray speed is 450 m / s, and the spray flow rate is 0.5 liters of liquid carbon dioxide and 4 cubic meters of compressed air per minute.

[0085] Contrast effect: High-pressure water gun was used ineffective; dry ice cleaning was too costly t...

Embodiment 3

[0090] Unit: Shanghai Kainajie Chemical Research Institute

[0091] Cleaning object: Dirt on car paint surface / engine compartment

[0092] Cleaning conditions: Under room temperature conditions (30°C, atmospheric pressure), liquid carbon dioxide is transported at a temperature of -10°C and a pressure of 20Bar; the flow rate of the liquid carbon dioxide is 1kg / min; the flow rate of compressed air is 3-5M 3 / min, the pressure is 0.5~0.7mpa; the liquid carbon dioxide is depressurized to 5Bar through the liquid decompression area of ​​the spray gun, and then mixed with compressed air evenly and stably, and then sprayed on the cleaning object. The spray speed is 400 m / s, and the spray flow rate is 1.0 liters of liquid carbon dioxide and 4 cubic meters of compressed air per minute.

[0093] Cleaning results: It can quickly remove the paint surface of the car body, the dirt and insect corpses on the surface of the wheel hub, especially for plastic parts.

[0094] The dirt on the su...

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Abstract

The invention relates to a cleaning method using a uniformly and stably jet cleaning agent formed by separately using liquid carbon dioxide or mixing liquid carbon dioxide and compressed gas. By the method, after at least one part of the liquid carbon dioxide produces solid-gas phase change, the liquid carbon dioxide is separately used as the cleaning agent and uniformly and stably jet to an object required to be cleaned or uniformly and stably mixed with the compressed gas to form the cleaning agent which is jet to the object required to be cleaned. Preferably, the liquid carbon dioxide is decompressed to 5Bar, so that at least one part of the liquid carbon dioxide produces the solid-gas phase change; the jet velocity is over 320 meters per second, the jet flow is 0.2 to 1.0 liter of liquid carbon dioxide per minute or 0.2 to 1.0 liter of liquid carbon dioxide and 4 cubes of compressed gas per minute; after at least one part of the liquid carbon dioxide produces the solid-gas phase change, the liquid carbon dioxide enters along the circumference of the compressed gas uniformly at intervals, so that the liquid carbon dioxide is uniformly and stably mixed with the compressed gas; and the cleaning method is implemented by adopting a jet gun. The method is skilful in design, easy to operate, low in cost and uniform and stable in jet, has a good cleaning effect, and is suitable for large-scale popularization and application.

Description

technical field [0001] The invention relates to the technical field of cleaning methods, in particular to the technical field of carbon dioxide cleaning, and specifically refers to a cleaning method in which liquid carbon dioxide is used alone or mixed with compressed gas as a cleaning agent for uniform and stable spraying. Background technique [0002] In the current field of industrial cleaning, the new dry ice cleaning method has attracted more and more attention from users in all walks of life. The dry ice cleaning equipment of foreign companies landed in the Chinese industrial cleaning market. Domestic manufacturers transplant R&D and production of dry ice blasting equipment. Gradually replace traditional chemical, high-pressure water, sandblasting and other traditional methods. [0003] The applicant represented the famous American brand TomCo 2 During the sales and after-sales service of dry ice blasting equipment, I found that everyone knows that dry ice blasting ...

Claims

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Application Information

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IPC IPC(8): B08B3/02B08B5/02
Inventor 林峡林洪全吴春进
Owner 上海鸣华化工科技有限公司
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