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Condensers of maintenance

The maintenance and upkeep of the condenser
(1)   water cooling and evaporative cooling of the condenser water softening process and make regular checks should be made to prevent scale build, when after the Canal wall furring requires to condenser cleaning, air-cooled cooler should be cleaned in a timely manner on the fins of dust.
(2)   should be regularly checked for corrosion of tube and sealing of the condenser, so as to avoid pipe blockage or perforation leakage accident. Leaking as soon as they occur, must be shut down to identify leaking tubes, blockage or other measures.
(3)   the condenser should be regularly removing noncondensable gases such as air accumulated at the top to prevent the condenser pressure is too high.
(4)   condenser system separating oil discharge once a month to avoid the condenser heat exchange surfaces covered with oil, cause the condenser temperature rises.
(5)   winter equipment downtime, should discharge the condenser and water circulation pump in the pump casing, avoid freezing equipment.
(6)   of evaporative condenser in stopping all the nozzles should be removed and cleaned, to thoroughly clean the sump, check the zinc coating is damaged, if the damage should be painted in high quality metal paint.
When you run central air conditioning water system which harm?
1. Unit runs against
Danger: scale
Scale usually has unusual solubility composed of content or slightly soluble salts, also known as a hard scale scale scale scale, water, alkalis or minerals. Since dissolved in water have a lot of alkaline earth metal ions and bicarbonate has unusual solubility of sparingly soluble salts, their heat transfer or changes of physical and chemical factors in the water and sediment from the water to the metal surface. Water constantly recycled in the process due to the increase of temperature, flow speed changes, the evaporation of water, inorganic ions and organic material is concentrated, will form in the condenser, piping and cooling towers of mineral scale. Scale of coefficient of thermal conductivity is less than 0.8, and the coefficient of thermal conductivity of copper tube in condenser and evaporator to 320, both more than 400 times times, this will lead to problems in three areas:
① cooling effect, 1 mm scale may decrease the effects of 20%-30%
II condenser pressure is increased, increasing back pressure the units compressor is bad, the motor load increase, increase energy consumption. Practice shows that can increase power 20%-30% per 1 mm scale, scale which can cause high pressure emergency shutdown.
③ scale metal surfaces often appear under-deposit corrosion, pitting under scale is one of the most serious corrosion.
Hazard II:
Sediments are collectively referred to as dirt, can be divided into two types of scale and sludge. Sludge and silt, slime and corrosion products. Composition of the sediments along the following lines:
①   sludge. Scale more lax, also known as the soft dirt. Often with mud, dust, sand, corrosion products, natural organic matter, bacteria and secretions, alumina, aluminium, iron phosphate and General debris.
②   mud. To sediment consisting mainly of soft dirt.
The slime. Also called biological sediment. Microorganisms and their secretions and debris, and as having a sense of creamy, gelatinous slime or mucus.
③   corrosion products. Primarily by biological sediments, sludges, corrosion products and components. People usually bring silt, corrosion products and three biological sediments become dirt.
Harm of sediment:
Whether hard scale (scale) or sulcus (sludge) I deposited on the heat exchanger will affect heat transfer, heat exchanger efficiency decreases. When heat exchanger jam energy increases. In addition soft dirt under-deposit corrosion. Such local than general danger of corrosion of, can lead to corrosion of the heat exchanger, in particular under-deposit corrosion caused by microbial slime, can make heat exchanger leak in a short time, or even non-normal production.
Hazard III: microbial algal
Under the central air conditioning circulation cooling water temperature, microbial growth, scale inhibitor is often many microbial source of nutrients and, therefore, the growth of microbial slime and dirt clogging is cooling and low-temperature heat exchanger danger. Microorganisms generally refers to bacteria and algae in cooling water. Due to the survival of microorganisms in the circulating cooling water nutrient content, and plenty of oxygen, sunlight, suitable conditions of water temperature, bacteria can proliferate in the cooling tower, over time, the Tower developed a bacteria and algae and Moss at the end of "incubators". Microbial product attached to the device on the wall besides the oxygen concentration outside the cell and generates hydrochloric acid, but also will reduce the flow of cooling water, thereby reducing the cooling efficiency of a heat exchanger, which these microbes secrete mucus blocking the tube, forcing the cleaning.
Central air conditioning type of microbe in circulating cooling water:
Microbiology is a Lowlife, collectively, usually refers to bacteria, fungi, algae, bacteria, sulfate-reducing bacteria, nitrifying bacteria, and protozoa.
Microbial algal source of circulating cooling water:
①   and carry the air of dust and other debris. II water. Third, industrial pollution and leakage.
Into central air-conditioning cooling water system of micro-organisms under the right growing conditions through mildewed under, absorb nutrients from the outside world makes itself up, or spores and cell division and reproduction. Arrive at the exuberant period of microbial growth, cells of log-linear relationship with time, cells grow exponentially. But microbial growth nutrients, temperature, PH, turbidity, sunshine, oxygen levels in the water and the influence of other substances, and cannot go on indefinitely by exponential growth, even in the Nutrition Foundation, proliferation of microbes quickly because nutrients are constantly consumed, reduced restrictions.
Cooling water system of central air conditioning cleaning process:
Scale according to the results of the site visit, sample analytical data and dissolution experiment in basic process can be determined. Chemical cleaning of central air condition cooling water system for the following process steps, or all.
Construction site visit → → equipment isolation meter removal and isolation → configuration → temporary pipeline pretreatment liquid pressure test water rinse ¡ú blending ¡ú passivation → check → washing → manual cleaning residue. BACK