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Dissolved oxygen, mg/l
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Free carbon dioxide, mg/l
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Alkalinity by phenolphthalein, mg∙eq/l
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pH value
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Suspended substances, mg/l
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Oils and petroleum products, mg/l
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Open
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No more than 0.02
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No more than 0.1
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No more than 0.3*
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No more than 5
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No more than 0.3
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Not more than the average annual permissible concentrations (ADC) established current standards radiation safety
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Closed
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No more than 0.02
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No more than 0.5
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No more than 5
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No more than 1
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* In agreement with the SES, 0.5 mg/l is possible
** Upper limit - with deep water softening
(Changed edition, Amendment No. 1).
The gas-oil water heating boiler KVGM-100 is intended for installation at thermal power plants in order to cover peak heat loads and as the main source of heat supply in district heating boiler houses.
The boiler is direct-flow, U-shaped, designed for heating water up to 150 °C with a temperature difference of 40°
C at peak operating mode and 80 °C in the main circuit (Fig.). As a standard solution for the main mode, single-flow power supply to the boiler from the front furnace screen is adopted. Hydraulic circuit peak mode includes two parallel flows covering only combustion or convective surfaces.
The boiler is equipped with three gas-oil burners RGMG-30 with rotary nozzles R-3500, installed on the front wall of the furnace in two tiers with a triangle with the apex up. Burner productivity for gas is 4175 m 3 /h, for fuel oil - 3835 kg/h. The required gas pressure in front of the burner is 0.04 MPa (0.4 kgf/cm2), fuel oil - 0.2 MPa (2 kgf/cm2). Burners that burn fuel oil are supplied with two air flows - general and primary; on gas only general air is supplied. By agreement with consumers, a boiler with oil-gas burners PGMG-40, equipped with steam-mechanical nozzles FMP 4600/1000, is supplied. The fuel oil pressure in front of the nozzles is assumed to be less than 2 MPa (20 kgf/cm2).´
2 and the same primary air fans.
In order to suppress nitrogen oxides, new boilers are equipped with air nozzles and recirculation systems in the furnace flue gases. The draft installation in this case includes a blower fan VDN-17 and a sharp blast fan VDN-15, a general exhaust fan DN-24´
2 and gas recirculation DN-15NZH.
Calculation data and design characteristics of the water heating boiler KVGM-100
Nominal heating capacity, MW (Gcal/h)................................. 116.3 (100)
Water pressure, MPa (kgf/cm2):
calculated........................................................ ........................................................ 2.5 (25)
minimum output................................................... ........................... 1.0 (10)
Water temperature, °C:
at the entrance................................................... ........................................................ ... 70/110
at the exit................................................ ........................................................ .150
Subcooling of water to boiling at the outlet, °C.................................................... ............. thirty
Water consumption, t/h................................................... ........................................................ ...1235/2460
Minimum hydraulic resistance of the tract, MPa (kgf/cm2):
with the original factory design of the upper convective package 0.25 (2.5)
after reconstruction by the plant of the upper convective package......... 0.35 (3.5)
Minimum gross boiler efficiency, %:
on gas................................................... ........................................................ ...... 93.2
on fuel oil................................................... ........................................................ .. 91.8
Maximum specific consumption standard fuel, kg/MW (kg/Gcal∙h -1), m 3 /MW (m 3 /Gcal∙h -1) 134 (156)
Range of heat output regulation from nominal, %... 20 - 100
Boiler ignition time no more than hours.................................................... ........................... 0.5
Mean time between failures, no less than h.................................................... ............ 5500
Service life between major repairs not less than a year......................... 2
Full assigned service life, year................................................... ............. 20
Specific emission of nitrogen oxides, g/m 3
on fuel oil................................................... ........................................................ ..0.38
on gas................................................... ........................................................ ...... 0.3
Overall dimensions, mm:
length................................................. ........................................................ ....... 14680
width................................................. ........................................................ .... 9850
height................................................. ........................................................ ..... 14365
Weight of metal, kg................................................... ................................................ 135000 Inlet water temperature, ° C
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