What are the reasons for insufficient burning in the coal chain grate boilers?
The first reason is unreasonable structural design.
In the operation of chain grate boiler, uneven distribution of short coal seams in grate, improper adjustment of coal feeder, unreasonable control of coal seams and poor regulation performance of air supply volume in air chamber will all lead to insufficient burning of coal.
The second reason is unreasonable setting of secondary air.
If the primary wind speed is too high, the air volume is too large, and the air rate is too large, the pulverized coal concentration is obviously low, and insufficient preheating will cause the ignition point of pulverized coal to increase, and successive flames cannot be formed. Improper selection of secondary air distribution will greatly reduce the flame temperature.
The third reason is coal quality.
The basic requirements of the boiler for fuel are very high. The coal with the particle size of 25mm-40mm is less than 30%, the large particle size is less than 40mm, the moisture is 12%-20%, the volatile matter is greater than 18%, the calorific value is greater than 4200 kcal/kg, and the ash melting point is not lower than 1100℃. If the ash content in coal increases and the evaporation content is low, it is not conducive to the dispersed combustion of pulverized coal.
-
DZL series coal-fired steam boilerLive Chat2-10 t/h1-2.5 MPa
-
SZL series coal-fired steam boilerLive Chat6-35 t/h1-2.5 MPa
-
DHL series coal-fired steam boilerLive Chat20-75 t/h1.25-5.4 MPa
-
Email us
-
WhatsApp: +86 18861589035
WeChat: +86 13506150756
Live Chat
-
In recent years, Venezuela's food processing sector has experienced rapid growth alongside gradual economic recovery, with meat processing as a vital component of its food industry undergoing continuous expansion. Meat processing imposes stringent requirements on equipment performance, particularly steam boilers as core production facilities, whose efficiency, stability, and environmental compliance directly impact product quality and operational costs. This context has driven increasing demand ...25 Mar 2025
-
Luxshare Precision Technology Co., Ltd., established in 2017 with a total investment of 18 billion RMB, is a globally renowned manufacturer of precision structural components. It serves major brands in fields such as information technology, automotive, and consumer electronics. As an important overseas branch, Luxshare Precision (Vietnam) Co., Ltd. has been rooted in Bac Giang Province, Vietnam, since 2019, focusing on providing high-quality products to the global market. With rapidly growing ma...18 Mar 2025
-
In the context of the global energy transition and the ongoing advancement of carbon neutrality goals, ZOZEN Boiler’s R&D team achieved multiple industry breakthroughs in 2024. With systematic technological upgrades, the company is laying a solid foundation for high-quality development in 2025. As a leading enterprise in the industrial boiler sector, ZOZEN Boiler is showcasing the strength of Chinese manufacturing to the world through continuous innovation and product advancements. &n...11 Mar 2025