DZH Biomass-Fired Hot Water Boiler

Product Introduction

The new DZH series hot water boiler is a single-drum longitudinal water-fire tube shell boiler, with a movable grate as the combustion equipment. The water walls on the left and right sides of the furnace serve as radiant heating surfaces, and the two wings of the furnace form convection heating surfaces. Threaded smoke tubes are arranged inside the boiler drum as convection heating surfaces. The furnace wall adopts a new technology of integrally poured and rammed heat-resistant concrete, and the outer side of the boiler main body is equipped with a three-dimensional protective shell.

In terms of overall structure, the boiler body adopts a top-mounted boiler drum, with water wall tubes and headers arranged symmetrically on the left and right. The boiler drum is welded by a cylindrical body and front and rear tube plates. A spark baffle wall is arranged inside the furnace, ensuring high combustion efficiency. This series of boilers adopts the latest scientific research achievements, such as header return water injection, arched tube plates, and threaded smoke tubes. These technologies solve the common problems of shell boilers, including tube plate cracking, water wall tube bursting, low thermal efficiency, insufficient output, and poor adaptability to different coal qualities.

Specification

ltem		DZH0.35-0.7/95/70-A1I	DZH0.7-0.7/95/70-AII DZH0.7-1.0/95/70-All	DZH1.4-0.7/95/70-AII DZH1.4-1.0/95/70-AII	DZH2.8-0.7/95/70-AII DZH2.8-1.0/95/70-A1 I
Rated thermal power(MW)		0.5	1	2	4
Rated outlet pressure(MPa)		0.7	0.7/1.0	0.7/1.0	0.7/1.0
Rated supply water temperature(℃)		95	95	95	95
Rated return water temperature(℃)		70	70	70	70
Heatingarea(m²)	Body	21.31	33	50	93
Heatingarea(m²)	Economizer	8.28	15	30	55
Effective area of grate(m²)		1.28	2.1	3.36	5.2
Exhaust gas temperature(℃)		135~145
Thermal efficiency(%)		84~86
Weight of biggest part for transportation(t)		8	12	15	22
Overall dimension partfor transportationL×W×H(mm)		3228×2000×2656	4108×2200×2915	4700×2300×3270	5600×2550×3563
Note: Due to continuous technological development, our company may change technical parameters without prior notice. Please understand!

Advantages

Elastic Drum Structure

The boiler drum is composed of arched tube plates and threaded smoke tubes, transforming the drum from a quasi-rigid structure into a quasi-elastic one. This design eliminates the braces in the tube plate area and reduces internal stress. By changing the smoke tubes inside the tube plate from two passes to a single pass, the problem of tube plate cracking is effectively solved.

Anti-Sludge Bottom Design

The lower part of the boiler drum is equipped with rising tube banks, which eliminate the dead water zone at the bottom of the drum. This prevents sludge deposition, ensures effective cooling of the high-temperature areas in the drum, and avoids bulging at the lower part of the boiler drum.

Fast Heat-Up, High Efficiency

By adopting high-efficiency heat transfer threaded smoke tubes, enhanced heat transfer is achieved, resulting in fast temperature and pressure rise of the boiler and improved thermal efficiency.

Compact Structure

The boiler features a compact structure. Compared with similar boilers, it has smaller overall dimensions, which reduces capital investment for boiler room construction.

Safe Natural Circulation

A header return water injection device is adopted to increase water velocity in the risers, thus avoiding subcooled boiling. In the event of a power failure, natural circulation is maintained to prevent water wall tube bursting, requiring no power-off protection measures.

Self-Cleaning Smoke Tubes

Threaded smoke tubes are adopted to enhance heat transfer, improving both heat transfer coefficient and thermal efficiency. The turbulent flow of flue gas inside the tubes prevents ash deposition, achieving a self-cleaning effect.

Product Introduction

Specification

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DZH Biomass-Fired Hot Water Boiler

Product Introduction

Specification

Advantages

Ready to Get Started?Fill the Form.

Related Products

Ready to Get Started?
Fill the Form.