Common Professional Names of Water Treatment (46-87)

Common names of circulating water treatment

(46) Circulating water. It refers to the system that uses water to cool the medium, called cooling water system.

(47) Once-through cooling water system. The cooling water passes through the heat exchange equipment only once and is then discharged.

(48) Open circulating water. It means using water to cool and remove the heat emitted by the medium or heat exchange equipment, and then when the hot water is in direct contact with the air, part of the hot water evaporates, so that most of the hot water is cooled and then recycled.

(49) Closed circulating water system, also known as closed circulating cooling water system. In this system, the cooling water is not discharged immediately after use, but is recycled and reused.

(50) Cooling tower. It is a device that uses water as a circulating coolant, absorbs heat from the system and discharges it into the atmosphere to reduce the water temperature. There are two cooling methods: natural ventilation and mechanical ventilation.

(51) Water distributor. The return water is evenly distributed to the filler through the water distributor.

(52) Filler. The return water passes through the filler to form a water film, increasing the contact area with the air.

(53) Water eliminator. It recovers some of the liquid water carried in the evaporated water vapor.

(54) Circulating water volume. It refers to the total circulating water volume of the cooling tower in the circulating water system.

(55) Make-up water: It is used to make up for the water lost in the circulating water system due to evaporation/blowdown/and splashing.

(56) Side stream volume. If refers to the volume of the water diverted from the circulating cooling water system, treated as required, and then returned to the system.

(57) Evaporated water volume. It refers to the amount of water evaporated during the operation of the circulating cooling water system.

(58) Discharge water volume. It refers to the amount of water that needs to be discharged from the circulating cooling water system.

(59) Water loss due to wind and leakage. It refers to the amount of water lost due to wind and leakage during the operation of the circulating cooling water system.

(60) Concentration multiple. It refers to the ratio of the salt concentration of circulating cooling water to the salt concentration of make-up water.

(61) Heat exchange. The exchange of heat between objects is called heat exchange. There are three basic forms of circulating water heat exchange: convection heat exchange, radiation heat exchange, and evaporation heat exchange.

(62) Thermal conduction. The phenomenon of heat transfer between parts of objects in direct contact is called thermal conduction.

(63) Convective heat exchange. In a fluid, the heat exchange between fluids is mainly due to the movement of the fluid, so that part of the heat in the hot fluid is transferred to the cold fluid. This heat exchange method is called convection heat exchange.

(64) Radiative heat exchange. Part of the heat energy of a high-temperature object is converted into radiation energy. After being emitted to the receiving object in the form of electromagnetic waves, the radiation energy is then converted into thermal energy and absorbed. This method of electromagnetic wave heat exchange is called radiative heat exchange.

(65) Evaporative heat exchange. It refers to a form of heat exchange in which the latent heat of vaporization is taken away when water molecules evaporate.

(66) Cooling water inlet and outlet temperature difference. It refers to the temperature difference of water between the cooling tower inlet and the water pool outlet.

(67) Wet bulb temperature. It refers to the air temperature when the water vapor in the air reaches saturation under the same enthalpy value air state.

(68) Dry bulb temperature. It refers to the temperature measured by a thermometer in ordinary air, which is the temperature we usually mention in weather forecasts.

(69) Physical cleaning. It means cleaning the debris out of the pipe by the flow rate of water.

(70) Chemical cleaning: It refers to keep the surface of the metal heat exchanger clean and activated by chemicals.

(71) Prefilm. Also known as chemical conversion film, which is a type of protective layer on the surface of metal equipment and pipelines. In particular, pipelines that have passed pickling and passivation can be protected by prefilming method.

(72) Corrosion Inhibitor. It refers to the process of inhibiting or delaying the corrosion of metals.

(73) Scale inhibitor. It refers to the process of preventing deposits from forming on the heating surface of heat exchange equipment by chemical or physical methods.

(74) Oxidizing biocide. It refers to a biocide with strong oxidizing properties, usually a strong oxidant, which has a strong killing effect on microorganisms in water.

(75) Non-oxidizing biocide. It does not kill microorganisms by oxidation, but by toxicity to the specific parts of microorganisms. Therefore, it is not affected by reducing substances in water.

(76) Available chlorine. It refers to the amount of chlorine with equivalent oxidizing power in chlorine-containing compounds (especially when used as disinfectants), which can quantitatively express the disinfection effect.

(77) Residual chlorine. It refers to the effective chlorine remaining in water after the water has been disinfected with chlorine for a certain period of time.

(78) Combined chlorine. It refers to the compound of chlorine and ammonia in water. There are three types: NH₂Cl, NHCl₂ and NHCl₃. NHCl₂ is more stable and has a better bactericidal effect. It is also called combined residual chlorine.

(79) Free residual chlorine. It refers to ClO^-, HClO, Cl₂, etc. in water. It has a fast sterilization speed and strong sterilization ability, but disappears quickly. It is also called free residual chlorine.

(80) Phosphorus. It refers to the +5 valence phosphorus in phosphate.

(81) Organic phosphorus. It is a compound containing a carbon-phosphorus bond or a phosphoric acid derivative containing an organic group.

(82) Total Iron. It refers to iron in various states, including all iron elements.

(83) Total zinc. It refers to zinc in various states, that is, including all zinc elements.

(84) Agent residence time. It refers to the effective time of the agent in the circulating cooling water system.

(85) Scaling. The calcium and magnesium bicarbonates dissolved in water decompose when heated, and white precipitates are precipitated, which gradually accumulate and adhere to the container, which is called scaling.

(86) Corrosion. It refers to the process in which (including metals and non-metals) produce loss and damage under the action of surrounding media (water, air, acid, alkali, salt, solvent, etc.).

(87) Biological slime. It refers to the sticky substance that is formed by microorganisms and the mucus they produce, mixed with other organic and inorganic impurities, and adheres to the surface of objects.