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d type water tube boiler D-type Water Tube Oil & Gas Fired Boiler

The design of internal seal casing and external embossed casing not only ensures good sealing, but also gives the boiler a better appearance

    Product details

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    D-type Water Tube Oil & Gas Fired Boiler

    ★ Boiler parameter range:

    SZS2~65t/h,SZS7~70MW。

    ★ Technical characteristics:

    This type of boiler is of double drum, vertical arrangement and “D” type furnace design with 1 or 2 burners located where the front wall stands. Inside it has an air-tight furnace structure with densely arranged tubes and air-proof casing. Outside it is covered with insulation materials and convex color plates. The flue gas takes a U turn. It goes into the 1st convection tube bank from the furnace, turns after passing the flue, and flows into the economizer with finned tubes when leaving the 2nd convection tube bank. The water which goes into the upper drum from the economizer is turned into steam by means of natural circulation after passing the convection tube bank and water cooled wall, and then supplied to the user via the main steam valve. Combustion at a slight positive pressure allows for a furnace volume heat release rate as large as nearly 40×103kcal.h/m3. Upper and lower drums and convection tube banks are assembled and subjected to a hydrostatic test prior to delivery. The steam boiler has a capacity of 2~75t/h and working pressure of 0.7~5.4Mpa, while the hot water boiler has a capacity of 0.7~21MW. The feedwater and return water temperatures are 95℃/70℃ and 115℃/70℃ respectively.

    The boiler has the characteristics of small volume, compact structure, high combustion efficiency, convenient installation , high degree of automation, etc.

    Adopting micro positive pressure combustion to improve the thermal efficiency and reduce the operation cost

    Upper drum adopts Φ 1000 - Φ 1200 diameter to increase the separation height and guarantee the quality of steam

    Boiler flue gas partition wall adopt seal membrance structure not only improve sealing and prevent short circuit  but also increase flue gas and improve the utilization ratio of steel and effectively reduce the size of our boiler.

    holes are pre-opened on membrane wall baffles for timely inspection and repair. The inspection of convection tube banks is no longer a problem. 

    Convection tube banks are assembled with special tooling/fixtures, and must pass a hydrostatic test prior to delivery. It not only reduces the installation workload, but also ensures the boiler quality.

    The structure design of densely arranged tubes and membrane wall with finned tubes ensures that it would never go overheating outside the furnace tube wall, and the sealing would be maintained. The temperature of insulation and sealing steel plates would not go over 250℃, which ensures the sealing steel plates’ ability of oxidation corrosion resistance.

    The design of internal seal casing and external embossed casing not only ensures good sealing, but also gives the boiler a better appearance

    .

    ★ Technical Specifications of SZS Series Oil/Gas-fired Steam Boiler:

    Parameter/Data

    Model

    Model

    Model

    SZS2-2.5-Y、Q

    SZS4-2.5-Y、Q

    SZS6-2.5-Y、Q

    Rated evaporation capacity

    t/h

    2

    4

    6

    Rated working pressure

    MPa

    2.5

    2.5

    2.5

    Rated Steam temp.

    °CC

    226

    226

    226

    Water feeding temp.

    °CC

    20

    60

    60

    Boiler heating area

    Radiate heating area

    m2

    13.5

    20.28

    30.25

    Convection tube bundle

    m2

    30.2

    66.5

    103

    Economizer

    m2

    32.7

    43.6

    104.64

    Flue gas Temp.

    °CC

    164

    162

    165

    Thermal efficiency of gas-fired boiler

    %

    ≈93

    ≈93

    ≈93

    Fuel available

    /

    Light oil/Heavy oil/Natural gas/Liquefied gas/City gas

    Ringeiman blackness

    /

    < Class 1

    < Class 1

    < Class 1

    Fuel consumption

    Light oil

    kg/h

    126

    252

    378

    Natural gas

    Nm3/h

    151

    301

    420

    Overall dimension of boiler assembled(L*W*H)

    m

    8.5x3.5x4.7

    10.5x3.5x4.7

    12.5x3.5x4.7

    Main steam value(DN )

    mm

    65

    100

    125

    Water feeding pipe(DN )

    mm

    50

    50

    50

    Parameter/Data

    Model

    Model

    Model

    ★ SZS10-1.25-Y、Q
         SZS10-1.25/350-Y、Q

    SZS15-1.6-Y、Q

    ★ SZS20-2.5-Y、Q
         SZS20-2.5/350-Y、Q

    Rated evaporation capacity

    t/h

    10

    15

    20

    Rated working pressure

    MPa

    1.25

    1.6

    2.5

    Rated Steam temp.

    °CC

    194

    204

    226

    Water feeding temp.

    °CC

    105

    105

    105

    Boiler heating area

    Radiate heating area

    m2

    38

    50.24

    70

    Convection tube bundle

    m2

    154.1

    193.25

    350

    Economizer

    m2

    52.32

    136

    378

    Flue gas Temp.

    °CC

    165

    160

    168

    Thermal efficiency of gas-fired boiler

    %

    ≈93

    ≥93

    ≈93

    Fuel available

    /

    Light oil/Heavy oil/Natural gas/Liquefied gas/City gas

    Ringeiman blackness

    /

    < Class 1

    < Class 1

    < Class 1

    Fuel consumption

    Light oil

    kg/h

    630

    930

    1270

    Natural gas

    Nm3/h

    700

    1050

    1406

    Overall dimension of boiler assembled(L*W*H)

    m

    10x3.9x4.5

    10.1x6.02x6.4

    13x6.58x5.92

    Main steam value(DN )

    mm

    150

    150

    150

    Water feeding pipe(DN )

    mm

    50

    65

    80

    Parameter/Data

    Model

    Model

    Model

    SZS25-2.5-Y、Q

    SZS30-2.0-Y、Q

    ★ SZS35-1.6-Q
         SZS35-1.27/350-Y

    Rated evaporation capacity

    t/h

    25

    30

    35

    Rated working pressure

    MPa

    2.5

    2

    1.6

    Rated Steam temp.

    °CC

    226

    215

    204

    Water feeding temp.

    °CC

    105

    105

    105

    Boiler heating area

    Radiate heating area

    m2

    75

    80.3

    82.42

    Convection tube bundle

    m2

    372

    398

    332.9

    Economizer

    m2

    390

    431

    691.8

    Flue gas Temp.

    °CC

    165

    162

    144

    Thermal efficiency of gas-fired boiler

    %

    ≈93

    ≈93

    ≥93

    Fuel available

    /

    Light oil/Heavy oil/Natural gas/Liquefied gas/City gas

    Ringeiman blackness

    /

    < Class 1

    < Class 1

    < Class 1

    Fuel consumption

    Light oil

    kg/h

    1575

    1890

    /

    Natural gas

    Nm3/h

    1750

    2150

    2450

    Overall dimension of boiler assembled(L*W*H)

    m

    11.25x6.76x6.33

    12.56x7.92x6.35

    16x5.54x6.35

    Main steam value(DN )

    mm

    150

    200

    200

    Water feeding pipe(DN )

    mm

    80

    80

    80

    Parameter/Data

    Model

    Model

    Model

    SZS55-1.3/350-Q

    ★ SZS65-1.27-Q
         SZS65-2.5/400-Q

    SZS75-1.6-Q

    Rated evaporation capacity

    t/h

    55

    65

    75

    Rated working pressure

    MPa

    1.3

    1.27

    1.6

    Rated Steam temp.

    °CC

    350

    194

    204

    Water feeding temp.

    °CC

    105

    130

    105

    Boiler heating area

    Radiate heating area

    m2

    118.5

    135

    150

    Convection tube bundle

    m2

    420.5

    495

    566

    Economizer

    m2

    780.6

    865

    950

    Flue gas Temp.

    °CC

    150

    156

    158

    Thermal efficiency of gas-fired boiler

    %

    ≥93

    ≥93

    ≥93

    Fuel available

    /

    Light oil/Heavy oil/Natural gas/Liquefied gas/City gas

    Ringeiman blackness

    /

    < Class 1

    < Class 1

    < Class 1

    Fuel consumption

    Light oil

    kg/h

    /

    /

    /

    Natural gas

    Nm3/h

    4235

    4550

    5158

    Overall dimension of boiler assembled(L*W*H)

    m

    17.6x10.4x7.7

    15.3x10x8.11

    15.3x10.5x8.11

    Main steam value(DN )

    mm

    250

    300

    300

    Water feeding pipe(DN )

    mm

    100

    125

    125

    Note: The data in the table are all for the boiler with mark ★.

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