Types of condenser
* Source : * Author : admin * Time : 2014-09-05 * Browse : 25
Condensing steam condenser is often used at the end of this multi-effect evaporator efficiency of secondary steam condensate, to ensure the end-effect evaporator vacuum. (A) spray condenser cases, cold water is injected into the upper nozzle, steam from the side entrance, steam and cold water full contact after condensation water, while downstream along the tube, some non-condensable vapor may also be brought out. Example (2) filled condenser, a steam into the discharge pipe at the top from the side in contact with cold water condenser installed inside the full ceramic ring packing, the packing is exposed to water, increasing the contact area between the cold water and steam , the steam condenses into water flowing along the lower part of the tubing, non-condensable gas portion above the tube is vacuum pumped to the condenser to ensure a certain degree of vacuum. Example (3) the condenser water spray plate or sieve, the purpose is to increase the contact area of the cold water and steam. Simple mixing condenser has a structure, high efficiency heat transfer, corrosion problems are relatively easy to solve.
Condenser boiler, also known as flue gas condenser, the boiler flue gas condenser, which can effectively reduce production costs, reduce exhaust gas temperature of the boiler, improve boiler thermal efficiency. The boiler is running in line with the national energy saving standards.
Energy conservation is the national "Eleventh Five-Year Plan" key to the transformation of economic development mode, and that is to implement the scientific concept of development and ensure sound and rapid economic development an important symbol, and special equipment as energy-hungry, but also the environmental pollution important source of special equipment to enhance energy saving tasks to be done. "National Economic and Social Development 10th Five-Year Plan" established a unit to reduce domestic production by about 20% of total energy consumption, emissions of major pollutants by 10% binding target for economic and social development. It is with industrial production "heart" of the boiler is the large energy consumption. High-performance special equipment mainly refers to the boiler, pressure vessel, heat exchanger equipment.
"Boiler energy saving technical supervision and management procedures" (hereinafter referred to as the "Regulations") on December 1, 2010 came into force. And proposed boiler flue gas temperature not higher than 170 ℃, saving gas boiler thermal efficiency of over 88%, does not meet the energy efficiency targets for the use of the boiler can not be registered.
In traditional boilers, boiler fuel in the combustion exhaust gas temperature is relatively high, the water vapor in the flue gas is still in its gaseous state, it will take a lot of heat. In all types of fossil fuels, the highest quality natural gas hydrogen percentage hydrogen content of about 20% to 25%, so that smoke contains large amounts of water vapor, according to estimates, burning one square meter of natural gas to produce steam heat away paper as 4000KJ, approximately more than 10 percent of its high calorific value.
Condensing the flue gas waste heat recovery unit, the use of low-temperature water or air cooling the flue gas, the flue gas temperature is reduced to achieve, close to the heat transfer surface area, the water vapor condensation in the flue gas, the sensible heat of flue gas while achieving the release of latent heat of condensation and water vapor release, and the water absorbs heat exchanger or air inside is heated to achieve heat recovery, improve boiler thermal efficiency.
Boiler thermal efficiency: 1NM3 natural gas combustion flue gas production theory about 10.3NM3 (about 12.5KG) with excess air factor of 1.3, for example, produce smoke 14NM3 (about 16.6KG) take the flue gas temperature down to 200 degrees Celsius. 70 degrees Celsius, releasing physical sensible heat about 1600KJ, water vapor condensation rate to take 50 percent, about the release of latent heat of vaporization 1850KJ, total heat 3450KJ, about 10 percent of natural gas low-fat calories, if we take 80 percent of flue gas into the heat recovery unit, can improve the utilization of geothermal energy more than 8 percent, natural gas fuel savings of nearly 10%.
Split layout, installation forms, flexible and reliable.
Spiral fin tube as a hot surface, heat transfer efficiency, adequate heating surface, flue gas side system overcast force is small, meet the general requirements of the burner.