Zhenghang deaerator rotary film deaerator

Zhenghang Rotary Membrane Deaerator
The structure of the Rotary Membrane Deaerator is composed of a deaerator head and a water tank. The structure of the deaerator head is composed of six major parts: the shell, the membrane rotor group, the water grate, the liquid vapor network, the steam distribution plate, and the steam-water separator. The water tank consists of a main body and accessories.
The shell is made by welding the barrel body and the stamped oval head.
The membrane unit consists of a water chamber, a membrane tube, a condensate water pipe, and a supplementary water pipe. The diaphragm pipe and sewer pipe are made of stainless steel and require no maintenance for year-round operation. They are also the main parts of the rotary membrane deaerator, through which oxygen is removed.
The water supply deoxygenated by the membrane section of the water spray grate and the water introduced from the drain pipe are reduced and redistributed here, so that the water falls in a uniform rain pattern, thereby protecting the lower liquid and steam network. The space area of the water grate is not less than the total cross-section. It has a stainless steel structure and does not require maintenance for year-round operation.
The filler liquid steam mesh is composed of flat steel strips spaced apart from each other and a cylinder, which is filled with two layers of highly customized stainless steel flat wire mesh. The feed water is fully contacted with the secondary steam here and heated to the saturation temperature. And carry out deep deoxygenation to ensure the content of deoxygenated water.
The main heating steam of the steam distribution plate is connected here. The regular evenly divided structure can well ensure the heating quality, so that the heating steam is in an evenly distributed state. It rises to heat the softened water under no throttling conditions and reaches saturation. Work at high temperature to remove oxygen.
The steam-water separator is made of stainless steel packing and has an inner mesh. The outer shell is designed with a ventilated structure, which can effectively separate the steam and water during oxygen exhaust and return them. It is an indispensable component for exhausting steam without water.
The water tank is made by welding the barrel body and the stamped oval head, with a reinforcing ring inside. The base is fixed on a prefabricated workbench, with one end fixed and the other end equipped with an expansion roller device. The water tank is equipped with a maintenance manhole, a safety valve connection port, a drainage port, a reboiling pipe port, a water seal cylinder port, a water level gauge port, a pressure gauge port, a thermometer port, a water port, etc.
Basic principles of thermal deaeration of deaerator
In the container, the amount of gas dissolved in the water is proportional to the partial pressure of the gas on the water surface. The main method of thermal deoxidation is used, that is, steam is used to heat the feed water, raising the temperature of the water, so that the partial pressure of the steam on the water surface gradually increases, while the partial pressure of the dissolved gas gradually decreases, and the gas dissolved in the water continues to escape. When water is heated to the boiling temperature under the corresponding pressure, the surface of the water is all water vapor, the partial pressure of dissolved gases is zero, and water no longer has the ability to dissolve gases, that is, the gases dissolved in the water, including oxygen, can be Remove. The effect of oxygen removal depends on the one hand whether the feed water is added to the boiling temperature under the corresponding pressure, and on the other hand it depends on the removal speed of dissolved gas. This speed has a great relationship with the contact surface area of water and steam. The working principle of the rotary membrane deaerator (jet flow, suction roll, turbulence, heat transfer, mass transfer, water film skirt, rain-like shape, saturation) The condensate water and supplementary water first enter the water chamber of the rotary membrane device group inside the deaeration head , under a certain water level differential pressure, it is sprayed obliquely from the small hole of the membrane tube to the inner hole to form a jet. Since the inner hole is filled with rising heating steam, the water sucks in a large amount of heating steam during the jet movement (test Proving that the jet motion has an entrainment effect) Address: Jingyi Road Pioneer Park, Haizhou Development Zone, Lianyungang City, a violent mixing and heating effect is produced in a very short time and a very small stroke, the water temperature is greatly increased, and the rotating water moves along the inner hole of the membrane tube The wall continues to spin down, forming a tumbling water film skirt. (The critical Reynolds number of water during rotating flow drops a lot, which results in turbulent tumbling. At this time, the heat and mass transfer effect of water in the turbulent flow state is optimal, and the water temperature reaches the saturation temperature. . Oxygen is separated. Because oxygen cannot diffuse freely in the inner pores, it can only be discharged from the exhaust pipe to the atmosphere with the rising steam. The feed water that has been roughly deoxygenated by the membrane section and the hydrophobic water introduced from the drain pipe are mixed here. Secondary distribution is carried out, and it falls evenly like rain onto the liquid vapor net installed below it, and then undergoes deep deoxygenation before flowing into the water tank. The oxygen content of the water in the water tank is high pressure цɡ/, and low pressure is less than цɡ/ reaching the level required by the ministry. Operating standards. Because the rotary membrane deaerator keeps the water in a turbulent flow state during operation and has a large enough heat exchange surface area, the heat and mass transfer effect is better and the exhaust volume is small (that is, it uses heated steam) The amount is small and the economic benefits brought by the small energy loss are also considerable) The abundant amount produced by the good deaeration effect can make the deaerator operate overloaded (usually the rated output can be exceeded for a short period of time) or reach the operating standard under low water temperature and full water replenishment