Boiler waste heat recovery and reuse, high efficiency, energy saving and cost saving
Shanghai Qihuang Energy Saving and Environmental Protection Equipment Co., Ltd. has long promoted boiler waste heat recovery and glass furnace waste heat recovery projects to save energy and increase efficiency for users and reduce costs. Boiler waste heat recovery and reuse reduces the heat loss of exhaust fumes, burns design coal or suitable coal for practical operation, insists on stable and appropriate boiler output, guarantees excellent boiler burning, prevents black smoke, and regularly sweeps on the heating surface Surface cleaning, lowering the excess air factor, and reducing air leakage can effectively reduce the loss of smoke. There is no greater space for energy saving in terms of operation, maintenance, experiments, inspections, etc.
The tube row of the waste heat recoverer is designed as a membrane tube row (or H-shaped tube row) to force the flue gas activity to be laminar, and there is no flue gas disturbance between the tube rows. Compared with the spiral fin type and smooth tube type, it is the most difficult to wear the heating surface placement method. And because of the friction between the flue pipe row of each flue and the flue gas, a dispersion method with high intermediate flow rate and low flow rate at both ends is formed. The flue gas velocity near the pipe wall is lower than the average value, and the flue gas disturbance is relatively weak, which alleviates the wear of the fly ash on the economizer. The flue gas flow rate has the greatest impact on the wear of the heated surface. The flue gas flow rate should not be too large when the heated surface is placed. The flue velocity of the heated surface can be changed by adjusting the horizontal intercept of the tube row during design, which can effectively prevent the wear of the waste heat recovery tube doubt.
The resistance of all the flue of the boiler is mainly overcome by the self-extraction force of the induced draft fan and the chimney, during which the induced draft fan is the main factor. After installing the waste heat recovery device, the entire flue gas resistance of the boiler must be added. Taking the thermal calculation result of a power plant as an example, the flue resistance is added around 70Pa. After installing the waste heat recovery device, the induced draft fan is transformed to further improve the output and ensure the normal operation of the boiler body after the installation of the waste heat recovery device, depending on the site conditions.
The low-carbon economy focuses on the efficient use of capital, and the Shanghai Qihuang flue gas waste heat recovery system is used as the main method to improve the power of the unit and reduce energy consumption. It is now more and more widely used in large thermal power generating units. The skills of this system The difficulty is low and the danger is small. Only by planning the plan in a scientific and reasonable manner according to the detailed characteristics of the power plant, you can obtain considerable benefits.
Shanghai Qihuang's summary analysis has the following three points:
1. The flue gas discharged from a natural gas boiler contains a certain amount of water vapor. If the temperature of the flue gas is reduced below the dew point temperature to recover the latent heat of vaporization released by the water vapor, the boiler power can be increased by more than 10%.
2. Compared with coal and petroleum, natural gas is a very ambitious cleaning energy source. The emission of flue gas has little pressure on the environment, and it is very suitable to transform it into a condensing waste heat recovery boiler to improve the power of the boiler.
3. Reasonable setting of key skill parameters can realize the stable operation of the waste heat recovery system for a long time. Some domestic power plants have successfully designed and installed the waste heat recovery use system, which has brought outstanding economic benefits to the power plant.
Telephone: (Miss Huang) 186-1609-6121 (WeChat) (Miss Yin) 136-7154-8349 (WeChat) Company telephone: 021-50422660
