What is power plant desulfurization and milling What equipment is used to process power plant desulf

You should be talking about the desulfurization system, most of the desulfurization of power plants use limestone as raw material, and the purchased limestone is transported to the factory to be milled into limestone slurry and sent to the absorption tower to absorb sulfur dioxide.

Processing limestone powder for desulfurization in thermal power plants requires the support of limestone grinding machinery and equipment. Limestone powder plays an important role in the desulfurization of thermal power plants, and it can be said that limestone powder must be used in the desulfurization of thermal power plants. The gypsum desulfurization process using limestone is one of the most widely used desulfurization technologies in the world, and about 90% of the flue gas desulfurization devices used in thermal power plants in Japan, Germany and the United States use this process.

If the raw materials of limestone are relatively large, it may also be necessary to configure crusher equipment to crush and process the limestone in the early stage, and then use ultra-fine mills and other grinding equipment for processing.

At present, the power plant mainly adopts the limestone lime-gypsum desulfurization process, which is a limestone slurry preparation system composed of limestone (block or powder) silo, grinding powder (to limestone block), pulping, storage and transportation equipment, limestone-gypsum desulfurization process is the world's most widely used desulfurization technology, Japan, Germany, the United States thermal power plants use about 90% of the flue gas desulfurization device adopts this process.

The processing process is to add water to limestone powder to make slurry as an absorbent pumped into the absorption tower and fully contact and mix with the flue gas, the sulfur dioxide in the flue gas and the calcium carbonate in the slurry and the air blown in from the lower part of the tower carry out oxidation reaction to generate calcium sulfate, and after the calcium sulfate reaches a certain saturation, crystallization forms gypsum dihydrate. The gypsum slurry discharged by the absorption tower is concentrated and dehydrated to make its water content less than 10%, and then sent to the gypsum storage silo by conveyor for stacking, and the flue gas after desulfurization is removed by the mist eliminator, and then heated by the heat exchanger, and then discharged into the atmosphere by the chimney. Because the absorbent slurry in the absorption tower is repeatedly circulated and in contact with the flue gas through the circulating pump, the utilization rate of the absorbent is very high, the calcium-sulfur ratio is low, and the desulfurization efficiency can be greater than 95%.

Now commonly used is the wet desulfurization technology, in short, the flue gas is washed with limestone powder solution, and the calcium in the limestone powder is combined with the sulfur in the flue gas to form gypsum discharge, so as to greatly reduce the sulfur dioxide content in the flue gas.

Running on the power plant, and it is desulfurization operation, then, the specific work is to monitor the on-site operation equipment, timely and effectively deal with small problems in the operation process, in order to ensure the normal operation of the equipment, the operation is inspection and operation, the operation may be more, and the inspection in the power plant also has a special person. Limestone powder for desulfurization in thermal power plants is because thermal power plants use wet limestone desulfurization technology, and limestone powder is used as a desulfurization agent.

Process: Limestone is ground into powder, water is added into limestone slurry, after mixing the flue gas, the sulfur dioxide in the flue gas reacts with water and limestone to generate sulfite, which is called calcium sulfate after oxidation. You can refer to the Zhonghuan column mill.

He is a professional power plant desulfurization equipment, the inner and outer two rotary bodies rotate concentrically at different speeds, and use medium speed and low pressure to repeatedly roll and crush the material layer close to the cylinder wall at supercritical speed. Most of the grinding materials after the first pass of the Zhonghuan column mill are already powdery, < 1mm particles are more than 50%, and after grading by the grading equipment, the products in the -1 + particle size range can be obtained, and can be easily adjusted according to the requirements of the boiler. In the 70s, China's electric power department began to carry out research work on flue gas desulfurization in power plants, and successively carried out semi-industrial tests or field intermediate tests such as sodium cycle method (W-L method), iodine-containing activated carbon adsorption method, limestone-gypsum method, etc.

Since the 80s, the power industry has carried out some large-scale research and development work on flue gas desulfurization. At the same time, in recent years, China has also increased the introduction of flue gas desulfurization technology. What are the positions in the desulfurization operation of power plants?

The operation positions on the power plant are: the chief, the unit chief, the captain, the deputy captain, the first patrol, the second patrol, the third patrol, some power plants are the chief, the unit chief, the main position, the deputy position, two one patrol, one second patrol, and some power plants are the duty chief, captain, driver, deputy driver, stairker, deputy stoker down and a few more work. That's how it's usually divided.