DZL2-1.25-T Chain Biomass Steam Boiler 2-ton Steam Boiler Burning Biomass Particle Fuel

The DZL series steam boiler is a single drum vertical water fire tube shell boiler, and the combustion equipment is a chain grate. The water cooled walls on the left and right sides of the furnace are radiative heating surfaces, and the two wings of the furnace are convective heating surfaces. Threaded smoke pipes are arranged inside the drum（ Ф fifty-seven × 3.5) For the convective heating surface, the insulation layer of the furnace wall adopts the overall pouring and ramming process of insulation concrete, and the outer side of the boiler host is a three-dimensional protective plate shell.

The overall structure of the boiler body adopts an upper boiler drum, with water cooled wall pipes and headers arranged symmetrically on the left and right sides. Drum made of Ф one thousand and two hundred × 14 cylinder and Ф one thousand and two hundred × The front and rear tube plates of 12 are welded together. The water-cooled wall pipe is Ф fifty-one × 3.5 boiler tubes with header Ф one hundred and fifty-nine × 6 boiler tubes, the descending tube is Ф one hundred and thirty-three × 6 Boiler tubes

Combustion process

The blue charcoal enters the furnace through the coal gate and burns on the chain grate. The generated smoke enters the two wing convection tube bundles along the bottom of the drum through the outlet smoke windows on the octagonal wall, enters the threaded smoke tube through the front smoke box, and enters the economizer. After sufficient heat exchange, the smoke is introduced into the dust collector by the induced draft fan for dust removal and finally discharged into the atmosphere through the chimney

Technical characteristics

(1) The boiler drum is composed of an arched tube plate and a threaded smoke pipe, which changes the structure of the boiler drum from a quasi rigid body to a quasi elastic body, eliminates the tension support in the tube plate area, and reduces stress. The smoke tube inside the tube plate has been changed from two returns to a single return, solving the problem of tube plate cracks.

(2) The lower part of the drum is equipped with an ascending tube bank, which eliminates the stagnant water area at the bottom of the drum, making it difficult for sludge to deposit. The high-temperature area of the drum can be well cooled, preventing bulging at the lower part of the drum.

(3) The use of efficient heat transfer threaded smoke pipes has achieved enhanced heat transfer effects, achieving the characteristics of fast boiler temperature rise and pressure rise, and improving the thermal efficiency of the boiler.

(4) Compact in structure, compared to similar boilers, it has a smaller overall size and saves investment in boiler room infrastructure.

(5) Stable operation, convenient adjustment, and sufficient output.

(6) The use of threaded smoke pipes enhances heat transfer, improving heat transfer coefficient and thermal efficiency due to the disturbance effect of smoke inside the pipes. The smoke pipe is not prone to dust accumulation and plays a self-cleaning role.

(7) The octagonal wall inside the furnace and the outlet smoke window have a certain dust reduction effect. The original dust concentration of the boiler is controlled below the standard, ensuring that the smoke and dust emissions of the boiler meet the national environmental protection regulations.