Pulverized coal burners

With extensive expertise in designing energy equipment, Powerz designs and manufactures all types of coal burners with any thermal capacity.

Pulverized coal burners by Powerz comply with all relevant environmental standards and safety and cost-effectiveness requirements. Pulverized coal burners are stocked with ignition devices and sensors which selectively control the burner's torch.

Currently, two types of vane swirlers are used for twisting secondary air: axial and tangential. Depending on parameters determining the quality of coal such as ash, abrasiveness and reactivity, either axial vane or scroll swirlers are used in primary air passages.


Classification of pulverized coal burners:
straight flow vaned vaned-
vaned
scroll-
vaned
double flow and
double swirl burners


In burners of all three types, high-density pulverized coal is injected through pipes (76 or 89 mm in diameter) with splitters at the end. Central and peripheral air passages have axial swirlers. Natural or coke gas is injected into burners via gas tubes located in series between the adjacent air passages.

Projecting parts of burners influenced by high-temperature combustion gases and radiation are made of heat-resistant materials.

Pulverized coal and gas burner with heating capacity of 26 MW.
When natural gas is used as a backup fuel
Pulverized coal and gas burner with heating capacity of 39 MW.
When coke gas is used
Technical specifications of GPGK-26 burners
Parameter Bituminous coal
Natural gas Fuel oil
Burner capacity, kg/h (m3/h) (nominal/maximum) 4394 2034 1542
Maximum heating capacity (in MW) 26,0 18,0 16,0
Turndown ratio 2 2 1,2
Maximum air resistance, kPa 2,0 - 1,0
Maximum natural gas pressure before burner, kPa - 15,0 -
Excess air factor 0,95 1,05 1,5
Gas temperature, °С 15 15
Maximum hot air temperature, °С 428 - -
Maximum fuel oil pressure before lighting-up burner, MPa - - 0,6
Geometrical features
Burner arch diameter, mm 816
Overall dimensions (L x H x W), mm
(not exceeding)
2050х1500х1350
Connection dimensions, mm 76х6/89х6
Coal:
High-density pulverized
coalspreader diameter

816
120
Air:
central passage
peripheral passage

250х500
500х1000
Natural gas:
Burner weight, kg (not exceeding)
159х4,5
850
Reliability requirements
Life until discarded:
Basic parts 200 000 hrs
Of them quick-wearing
(nozzles of gas and dust passages)
15 000 hrs
"Recovery time depends on duration of boiler repair Likelihood of failure-free performance" 0,98
Average life before first overhaul 4 years

Due to multitude of fuel types, capacities and applications, Powerz designs and delivers pulverized coal burners which may be operated under custom conditions.

This case describes technical specifications of GPGK 26 burners.

Design characteristics
Passages Swirler type Blade angle Design parameters of twist Share of total air per burner
Central axial 40° 1,64 0,194
Peripheral Axial with profiled blades 55° 3,2 0,800
Company
197PROJECTS IMPLEMENTED
3,3 GW of capacity provided by our equipment
24 OUR EQUIPMENT IS USED IN 7 COUNTRIES
Project geography