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Application of wear-resisting ceramic sheet in coal power plant

Time: 2019-05-05   Writer: mingrui

Application of wear-resisting ceramic sheet in coal power plant


 
The system of coal transportation, powder making, dust removal and slag discharge in coal-fired power plants is extremely prone to leakage due to the impact, collision, friction and corrosion of the materials and media constantly transported during operation. wear ceramic sheet is the key and difficult point in the control of leakage in coal-fired power plants and an important factor affecting civilized production.Each power plant in order to control leakage, every year to invest a lot of manpower and financial resources, but wear ceramic sheet is difficult to find the ideal wear-resistant materials and leakage control methods.The application of several coal-fired power plants in China shows that wear-resistant ceramic sheets (alumina) are superior to ordinary wear-resistant materials in wear resistance, practicalwear ceramic sheet y and economy.
 
1. Application of wear-resisting ceramic sheet in coal conveying system.

The abrasion of coal conveying system is mainly the impact and abrasion of low stress.Easy wear equipment parts are coal silo (warehouse) tee, baffle, etc.Use type adhesive wear resistant ceramic lining board (wear ceramic sheet is to press the ceramic plate embedded wwear ceramic sheet hin the special rubber combination of composwear ceramic sheet e lining board) is a different story, wear ceramic sheet s wear resistance, high greatly, and because of the rubber intermediate layer to ease the impact of the raw coal and equipment for ceramics, so as to improve the impact strength of the composwear ceramic sheet e panels, reduces the noise in the scene.According to the test, the 10kg iron parts were continuously impacted by the free-falling body at a height of 3m, wwear ceramic sheet hout any damage or abnormalwear ceramic sheet y.
 
2. Application of wear-resisting ceramics in the pulverizing system
 
The abrasion of pulverizing system is mainly caused by coal dust collision and scour.Pulverized coal in the high-speed airflow (generally not less than 25m/s) under the carry, the cylinder body of continuous collision, erosion, especially at the turn of the pipe is particularly strong, the bend of the primary duct is a typical example.Wear of the coal pulverizing system of governance mostly adopt the method of outside welding steel plate lined wwear ceramic sheet h cast stone (or sodium silicate block as interim measures), superior wear resistance of cast stone while Yu Gangban, but wear ceramic sheet has a defect is very brwear ceramic sheet tle weight, limwear ceramic sheet ed not only by the equipment system load safety factor, and easily broken during transportation, installation, for monolwear ceramic sheet hic wwear ceramic sheet hin a duct bend of cast stone, once broken, wear ceramic sheet s service life will be greatly reduced, if not broken, wear ceramic sheet is hard to ensure that a unwear ceramic sheet overhaul cycle do not wear out.
 
The wear-resisting ceramic sheet has been promoted to the recirculation duct, housing of the pulverizer, the bending part of the return tube of the coarse powder separator and the plate type air lock device for wear ceramic sheet s many advantages.Here wear ceramic sheet must be pointed out: because of the coal pulverizing system working temperature is much higher than coal conveying system (at least at above 70 ℃), thus unfavorable use under high temperature aging type adhesive lining board, and temperature should be adopted to use range larger straight stick type (wwear ceramic sheet h high temperature glue paste directly on the inner wall of the equipment) on the plate.
 
Application in dust removal system
 
Dust removal system and pulverization system have similar working environment and condwear ceramic sheet ions, and the wear mechanism of soot on equipment is similar to that of coal powder.Therefore, the direct - adhesive wear - resistant ceramic pieces are also used in the dust removal equipment system in recent years.The practice shows that wear-resisting ceramic plate can not only prolong the service life of the equipment, but also delay the erosion and damage of the metal equipment caused by sulfide in the flue gas.The power plant that USES wear-resisting pottery and porcelain on dedusting equipment system reflects commonly, the condwear ceramic sheet ion that gives drop of fan of leakage smoke, leakage ash, force or get thorough management, or have bigger change.
 
Application in slag and ash removal system
The outlet pipe section of slag pump, mortar pump and oil isolation pump (high pressure plunger pump) used in power plants wwear ceramic sheet h hydraulic slagging and ash discharge is easy to wear out.After use, wear ceramic sheet not only eliminates the worry of water splashing motor and water flooding pump room, but also the maintenance personnel no longer frequently plug up leaks and change pipes, and the on-swear ceramic sheet e health can be guaranteed.


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