The impact and harm of poor vacuum in ABS chillers

The impact and harm of poor vacuum in ABS chillers

Vacuum is the primary vitality of lithium bromide refrigeration units. If there is a leakage in the unit, the vacuum degree cannot be effectively guaranteed, and the unit will cause irreversible damage to its internal cavity during operation. This article explores in depth the causes and potential hazards of corrosion in the internal cavity of the unit caused by poor vacuum.

Lithium bromide solution itself does not corrode ferrous metals (steel plates), but it can accelerate the corrosion reaction of ferrous metals under the action of oxygen, at a rate several times faster than the natural reaction of ferrous metals. Corrosion reaction can generate Fe3+dissolved in lithium bromide solution, and another part forms solid black iron oxide. This foreign substance is relatively loose and will adhere to the internal cavity of the unit. As the solution circulates around, the lithium bromide solution becomes black. As the unit operates, the solution is evenly sprayed onto the copper tube, and the oxidized Fe3+has a strong corrosion reaction on the copper tube (Cu). In a unique environment, the copper content in lithium bromide solution reaches saturation and precipitates, causing ion displacement on the surface of the steel plate and ultimately forming electroplating phenomenon.

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After being corroded by Fe3+on the copper surface, some copper ions become compatible with each other, forming smaller copper particles. Due to the relatively light weight of copper particles, when a large number of copper particles are suspended on the surface of the solution, they aggregate with each other to form a copper surface. After the operation of the unit stops, the copper surface settles at the bottom of the unit, forming a thinner copper skin.

1】 The products generated by corrosion will decrease the cleanliness of lithium bromide solution, increase the viscosity of the solution, and affect the circulation of the unit solution;
2】 The lithium bromide solution has a high impurity content, which can generate a large number of bubbles when heated and boiled in the high-temperature generator, causing abnormal liquid level control of the unit;
3】 After lithium bromide solution is sprayed onto the copper tube, black foreign objects will adhere to the outer wall of the copper tube, affecting the heat transfer coefficient of the copper tube.

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1】 Corrosion products can block heat exchangers and filter screens of shielded pumps, accelerating the wear of their internal bearings;
2】 Corrosion products can block the spray system, causing obstruction to the operation of the unit's spray system;
3】 There are many impurities in the solution, which will continuously wear down the copper tube during the circulation process, affecting its service life.

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In summary, it is necessary to regularly check the vacuum level of the unit during operation, promptly detect and solve leakage problems, in order to ensure the normal operation of the lithium bromide refrigeration machine. In addition, for units that have already developed internal cavity corrosion, effective cleaning and repair measures should be taken to remove the corrosion products, restore the cleanliness and smoothness of the unit interior, thereby extending the service life of the unit and improving its operating efficiency. At the same time, strengthening the daily maintenance and upkeep of the unit, regularly inspecting the wear and corrosion of each component of the unit, and timely replacing damaged parts are also important measures to prevent internal cavity corrosion. Once the unit experiences poor vacuum, the cause should be promptly identified. At the same time, the ion content inside the lithium bromide solution should be regularly tested, and if necessary, the solution should be regenerated to extend the operation and service life of the unit.

The company's main business scope includes: central air-conditioning maintenance, cleaning and technical services; cooling tower and fan coil cleaning and maintenance services; custom processing of lithium bromide solution; sales of lithium bromide solution special impurity separators; central air-conditioning host and various zero Sales of accessories; installation and sales of central air conditioning systems, etc.

Widely used in major air-conditioning systems and process refrigeration cold and heat sources; in steel, textile, chemical, electronics, pharmaceutical, food and other industrial and mining enterprises, as well as hotels, theaters, hospitals, and large commercial buildings , Central heating stations and other occasions are widely used.

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