ASME Standard High Efficient Steam Hot Water Boiler for Industry
and Power Station
Product Introduction
Steam boiler refers to the water heated to a certain parameter and
the production of high temperature steam industrial boiler, water
in the pot tube heat into steam, fire in the furnace heat, is the
principle of steam boiler.Steam boiler belongs to special
equipment, the design, processing, manufacturing, installation and
use of the boiler must be subject to the supervision of the
technical supervision department, the user can only obtain the
boiler use certificate, can use the steam boiler.
Advantages
• The shorter path of water supply to the riser tubes leads to faster
and more reliable operation on different loads and a quick start
up.
• Low risk of Foaming . As the water and the steam-water mixture
which is fed into the drum maintains the same and constant level
all the time leaving the space above water level in drum ( please
refer to the schemactic diagram pic).
• Quick load variations and reliable operation in variable loads and
at any significant change in pressure as the water level in the
drum is stable and remains inaffected from turbulence.
• Less steel is needed as there is no lower boiler drum and moreover
the absence of lower drum eliminated unwanted thermal stresses.
• Self supporting construction by the four downcomers.
• It can expand from the base in all directions and adapt to
different operating conditions.
• The thermal expansion is from top to bottom and with the usage of
grate firing the grate firing the thermal expansion difference is
minimised there by manifesting the sealing between grate and the
boiler.
• It can be coupled with Concentrated solar power plant (CSP) as well
in order to have increased efficiency ( above 33%) where the main
fuels are Biomass, Landfill gas and Wood.
• Construction and arrangement of heating surfaces is flexible as
water can be supplied directly from the drum which is placed quite
far away from heating surfaces.
Working Principle
Heating equipment (burner) release quantity of heat, heat transfer
by radiation is absorbed by water wall first, water wall of water
boiling vaporization, produce a large amount of steam into the
steam drum for separation (except dc furnace), saturated steam into
the superheater, isolated by radiation and convection way continue
to absorb the chamber at the top and horizontal flue, the tail of
the flue gas heat, and to achieve the required working temperature
in superheated steam.
The boiler for power generation is usually equipped with a
reheater, which is used to heat the steam after the high-pressure
cylinder does work. The reheat steam from the reheater goes to the
middle and low pressure cylinder to continue to do work and
generate electricity.
Technical Parameter
| Model | DHL10 | DHL15 | DHL20 | DHL25 | DHL35 | DHL65 | DHL75 | DHL100 |
| Evaporator | t/h | 10 | 15 | 20 | 25 | 35 | 65 | 75 | 100 |
| Work pressure | MPa | 1.25,1.6,2.5 | 1.6,2.5,3.82,5.4 |
| Steam temperature | ℃ | 194,225,300,350,400 | 225,300,350,400,450,485 |
| Feedwater temperature | ℃ | 20,50,104,130,150 |
| Burning method | | Layer burning(Grate) |
| Boiler efficiency | % | ≥82 | ≥84 |
| Fuel consumption | Kg/h | 1450 | 2175 | 2900 | 3625 | 5075 | 8264 | 9532 | 14500 |
| Main steam pipe(DN) | | 125 | 150 | 200 | 200 | 250 | 250 | 300 | 300 |
| Valve(DN) | | 50 | 50 | 50 | 65 | 80 | 100 | 150 | 200 |
| Chimney diameter(￠) | Mm | 670 | 870 | 870 | 1000 | 1000 | 1250 | 1400 | 1400 |
| Toatal power consumption | KW | 72.15 | 104.5 | 155.9 | 225.9 | 359 | 642 | 838.5 | 785.5 |
| Grate weight | m2 | 12 | 16 | 22 | 27 | 32 | 64 | 72 | 93 |
| Induced draft fan | Kw | 37 | 55 | 90 | 110 | 185 | 310 | 400 | 400 |
| Blower | 15 | 22 | 30 | 55 | 90 | 160 | 185 | 185 |
| Feed pump | 15 | 22 | 30 | 55 | 75 | 160 | 240 | 185 |
| Coal supplier | 2.2 | 2.2 | 2.2 | 2.2 | 3 | 3 | 3 | 3 |
| Slag | 2.2 | 2.2 | 2.2 | 2.2 | 3 | 4 | 5.5 | 5.5 |
| Speed reducer | 0.75 | 1.1 | 1.5 | 1.5 | 3 | 4 | 4 | 5 |
| L | 12000 | 13000 | 13000 | 13000 | 14500 | 16700 | 19000 | 21000 |
| W | 7000 | 7000 | 8000 | 8000 | 9800 | 14500 | 14500 | 16000 |
| H | 9000 | 9500 | 10000 | 12000 | 12000 | 15000 | 15000 | 17000 |
Fuel:Bagasse, Biomass, Lignite, Coal,Bituminous coal, Scaly Bark,
Fuel gas, Industrial waste, khuff gas, MFO(marine fuel oil),
Organic matter, Oil, Litter, Rice hulls, Rubberwood, Sludge, Wood,
Woodchips.
Company Profile
Hua Dong Boiler Co., Ltd. is a high-tech enterprise specialized in
manufacturing boilers. Established in early 1985s, has two
manufacturing bases, this company covers 400,000 ㎡ with fixed
assets amounting to USD 110,000,000. There are 1100 employees
including 150 technicians and 600 coded welders. Hua Dong holds the
manufacturing licenses for Grade A boilers and Grade A1&A2
pressure vessels issued by Chinese General Administration of
Quality Supervision, Inspection and Quarantine; also it holds the
"S" and "U" "NB" stamps issued by American Society of Mechanical
Engineers; meanwhile, this Company has passed the certification of
ISO9001, SO3834, EN12952 Quality Management System.
