The working principle and function of flash steaming tank
1, The stainless steel made flash tank is the high pressure saturated water into the lower pressure container, due to the sudden reduction of pressure to make these saturated water into saturated water vapor and saturated water under the pressure of the container.
2, the boiling point of the substance is increased with the increase of pressure, and decreased with the decrease of pressure. In this way, the high-pressure and high-temperature fluid can be reduced by reducing its boiling point and entering the flash tank. At this time, the fluid temperature is higher than the boiling point at this pressure. The fluid is rapidly boiled and vaporized in a flash tank, and the two phases are separated. The device that vaporizes the fluid is not a flash tank, but a pressure reducing valve. The role of the flash tank is to provide space for rapid vaporization of the fluid and separation of vapor and liquid.
Working principle
The principle of stainless steel flash tank is to use the saturated vapor pressure difference of the substance at different temperatures to rapidly evaporate the liquid substance by reducing the pressure, so as to achieve the transformation of the liquid substance to the gaseous substance.
Flash tank structure
The structure of flash tank is generally composed of tank body, feed pipe, discharge pipe, steam pipe, exhaust pipe, etc. The tank body is the main part of the flash tank, and its interior is usually made of stainless steel material, which has good corrosion resistance, high temperature and pressure resistance. The feed pipe and the discharge pipe are used respectively for the input and output of the liquid substance to the flash tank, the steam is used for the input of steam to the tank, and the exhaust pipe is used to discharge the gas in the flash tank.
When the liquid material enters the flash tank, the high temperature and high pressure steam is input through the steam pipe, so that the pressure in the tank rises rapidly. At this time, the saturated vapor pressure of the liquid substance also increases, but because the temperature of the liquid substance is low, its saturated vapor pressure is still low. Therefore, when the pressure in the tube reaches a certain value, the saturated vapor pressure of the liquid substance will be lower than the pressure in the tank, and the liquid substance will quickly evaporate, thus transforming into a gaseous substance.
The advantage of flash tanks is that they can quickly convert liquid substances into gaseous substances, thereby increasing production efficiency. In addition, the flash tank also has the advantages of energy saving and environmental protection, so it can convert liquid substances into gaseous substances at a lower temperature, thereby reducing energy consumption and environmental pollution.
Give an example
When water is heated at atmospheric pressure, 100 ° C is the temperature that liquid water can allow at that pressure. Reheating does not raise the temperature of the water, but only converts the water into steam. The heat absorbed by water in the process of heating up to the boiling point is called "sensible heat", or the sensible heat of saturated water. The heat required to convert saturated water into steam at the same atmospheric pressure is called latent heat. However, if the water is heated at a certain pressure, the boiling point of the water will be higher than 100 ° C, so more sensible heat is required. The higher the pressure, the higher the boiling point of water and the higher the heat content. The pressure is reduced, part of the sensible heat is released, and this part of the excess heat is absorbed in the form of latent heat, causing part of the water to be "flash" into steam.
Be careful
Flash tank in the design and use need to pay attention to, first of all, should choose the appropriate liquid substance and steam to ensure that its evaporation speed and quality in the flash tank uniform. Secondly, an advanced control system should be used to monitor and adjust the pressure, temperature, flow and other parameters in the flash tank in real time to ensure the safe and stable operation of the equipment. It is necessary to strengthen the training of operators to ensure that they can correctly operate the flash tank.
