1. Chain belt grate. The chain belt grate is a wide circular chain belt which is surrounded by and supported on the the front and rear axles via the chain wheels. At present, ZOZEN packaged chain grate steam boiler mainly adopts the large-block chain belt grate with a capacity of 1-20 tph.
2. Scale grate. The scale grate has many advantages. The obvious one is that there is less coal leakage. The scales can be replaced without shutting down the boiler. The ventilation is balanced, and the ventilation section is relatively small (6%). The chain grate bars only bears the stress or high temperature instead of both of them, which improves the working conditions of the chain grate.
3. Beam grate. Its main feature is that the width and length of the grate can be extended in a wide range, and the tonnage of the boiler can be larger. At present, the tonnage of the domestic beam chain grate steam boiler can reach 240 tph. The grate is featured with long service life, good durability, smooth arrangement and convenient replacement.
Chain Grate Boiler,Travelling Grate Boiler,Travelling Grate,Step Grate Boiler Jinan Yuanda Power Equipment Co.,Ltd. , https://www.ydpowerequipment.com
China National Heavy Duty Truck Group produced 54,381 heavy vehicles in the first quarter, up 66.1% year-on-year; 53.915 heavy-duty cars were sold, an increase of 69.1% year-on-year. Among them, the production and sales of heavy trucks in March exceeded 20,000, an increase of more than 20%.
CNHTC introduced that since the beginning of this year, due to the continuous improvement of national policies and the economy, the heavy-duty truck market has been extremely hot, orders have been full, and user demand has increased substantially, showing a trend of both production and sales.
Sinotruk seized the opportunity of a new round of market, adhered to the theme of adjusting industrial structure, transforming growth mode, and independent innovation, seizing opportunities, developing scientifically, implementing lean management in an all-round manner, strong product sales, strong demand, and demand for engineering vehicles. Far more than road vehicles; sales of new products such as HOWO-A7, mining vehicles and natural gas vehicles continued to increase; tractors continued to grow.
CNHTC said that the good start of the first quarter has laid a solid foundation for CNHTC to complete its 2010 production and sales targets.
View related topics: China National Heavy Duty Truck Breaks Monthly Sales Record for National Heavy Truck Industry 
The chain grate is the combustion equipment of coal-fired steam boiler. There are three main types and structures: chain belt grate, scale grate and beam grate.