DHL series coal-fired steam boiler introduction

Bulk coal-fired steam boilers are of DHL type and SHL type, and DHL series bulk boilers are single-drum horizontally arranged water pipes bulk boilers. The SHL series of bulk boilers are double-tube horizontally arranged water pipes bulk boilers. The boiler is composed of an upper drum, a water wall, a convection tube bundle, a steel tube type economizer, and a tubular air preheater. The front part of the boiler is composed of water-cooled walls, and the front and rear water-cooled walls form a front and rear water-cooled arch. A convection tube bundle is arranged in the horizontal flue. A steel-type economizer and a tubular air preheater are arranged at the tail of the boiler. The combustion equipment adopts a scale-type coal-free grate, which is divided into a ventilating structure and is sensitively adjusted. The grate is driven by a continuously variable transmission gear box. The boilers are shipped in bulk and assembled on site.

The DHL series coal-fired steam boiler adopts a single-drum transverse type, a beam type non-leaking coal grate, a combustion chamber arch arrangement, a unique patented groove type separator technology, and a high thermal efficiency of the boiler. It is especially suitable for technical requirements such as grain and oil, chemical, paper, textile and other industries. Its characteristics represent the forefront of current coal-fired chain boiler technology. According to the needs of users, we can design mixed combustion such as coal burning and biomass burning, or biomass burning separately.

Technology Advantages

Classic DZL furnace design

Arched tube sheet, threaded pipe, splayed flue, ejector cycle, jet disturbance design, compact structure, single-layer layout, small footprint, small investment in boiler room construction;

The large water capacity of the boiler is conducive to power outage protection; the water circulation system is rationally designed, and the water circulation pressure difference is large, so that the water circulation is safe and reliable;

The boiler is equipped with interlocking protection devices such as low water level, high steam pressure, high exhaust gas temperature, steam flow, furnace outlet temperature, exhaust gas temperature and other display functions as well as continuous water supply and combustion automatic adjustment device, and computer control system is adopted. Boiler operation and fault diagnosis are convenient and reliable.

Combustion chamber uses full membrane water cooling wall structure and pressurized combustion without smoke mixture.

Main energy saving measures

A large number of tail heating surfaces, economizers and air preheaters are arranged to make the thermal efficiency high.

Reasonable front and rear arch arrangement is conducive to coal combustion.

Main environmental protection measures

The internal structure of the furnace is advanced, and the structure of the cyclone chamber enables a large amount of soot to be diverted in the inside of the furnace, so that the dust is completed in the furnace, and the environmental protection effect is good.

The structure of the chain grate is advanced, which reduces the incomplete combustion of coal, reduces the loss of physical and chemical heat, and produces less ash and slag;

The furnace wall structure is reasonable to prevent smoke and dust diarrhea;

Technical data