Application of limestone fine powder mill

Application of limestone fine powder mill

Application of limestone fine powder mill in power plant desulfurization project

Why do you use limestone as a desulfurizer for desulfurization in thermal power plants? The pulverized coal mortar discharged from the thermal power plant is useless, harmful, large, and numerous. The pH is generally around 8.5-13. Why can't it be used for desulfurization? Calculate the desulfurization substances in the fly ash according to the principle of lower middle. The desulfurization material in the pulverized coal slurry is more than four times that of the 3% sulfur content of coal. Sufficient for desulfurization. Not only is it valuable, but it is absolutely necessary to apply fly ash to the desulfurization of thermal power plants. The latest flue gas differential treatment process using high, precise and sharp technology can not only fully mix the fly ash slurry with sulfur dioxide, but also reduce the height of the traditional desulfurization tower by more than 50%. In other words, it can greatly reduce the floor space and space.

According to the successful performance of more than ten industrial applications, it can be practically applied to high-efficiency dust removal and desulfurization devices in thermal power plants. The dust removal and desulfurization efficiency is generally around 99.9999%. In other words, it is possible to save the part of electrostatic precipitator. For dust control and desulfurization of domestic and foreign coal-fired power plant boilers, the cost of dust removal and desulfurization is high, the efficiency is low, the structure is complicated, the operation is cumbersome, the secondary pollution is excessive, and the defects are too much. The research and development is successful and can be widely used in the field of flue gas treatment. Combined with zero discharge of power plant sewage, and can be combined with urban sewage water treatment, all localized, low-cost, high-efficiency wet dust removal, desulfurization, sewage treatment integrated technology and equipment.

At present, there are more than 200 kinds of flue gas desulfurization processes in the world. After decades of continuous exploration and practice, there are only 10 kinds of desulfurization processes applied in thermal power plants, the most important of which is limestone. Gypsum wet flue gas desulfurization process.

The limestone-gypsum wet flue gas desulfurization process is currently the most widely used desulfurization technology. The principle is to use a desulfurization mill to grind limestone into stone powder, then use limestone as a desulphurization absorbent and enter the absorption tower. The flue gas is in contact with the mixture, and the sulfur dioxide in the flue gas chemically reacts with the calcium carbonate in the slurry and the incoming air, and finally generates gypsum to remove the sulfur dioxide in the flue gas, thereby avoiding environmental pollution caused by a large amount of emissions.

The whole flue gas desulfurization system consists of the following parts: flue gas system, absorption tower system, limestone slurry preparation system, gypsum dehydration system, etc. The main function of the limestone slurry preparation system is to prepare the absorbent slurry for the flue gas desulfurization device. The bulk truck transports the limestone powder ground by the desulfurization mill to the limestone silo, and then enters the slurry tank, and the process water inside is stirred. Under the action of the device, the mixture is made into a slurry. The main function of the desulfurization mill is to grind large pieces of limestone into stone powder and then feed it into the limestone slurry preparation system. According to different preparation processes, users can choose differently configured mills.