The main part of the boiler is of naked installation with accessories included

Specifications:
1) Actual evaporation: 4MT/h 
2) Pressure: 1.25MPa
3) Saturated steam temperature: 194oC
4) Water supply temperature: 20oC
5) Tested thermal efficiency: 79.6%
6) Outer size (L x W x H): 7,000 x 4,000 x 4,900   
7) Fuel category: soft coal II

The boiler is with a dual cylinder longitudinal structure and natural cycle methods consisting of the upper components with the dominant main parts. The lower components are primarily the combustion equipment. The two main parts can be instantly installed and manufactured. 

The boiler housing is with dense water exhaust cooling wall around the hearth. Partition is mounted at the back of the hearth in front of the convection check and forms the combustion ash room. Convection check is mounted at the back of the combustion ash room. The smoke flows into the first and the second checks through the combustion ash room and exhausts into the chimney through the coal saver and dust catcher. 

Structure: 
1) Upper and lower cylinder diameter: φ800mm 
2) Cylinder central distance: 2,290mm 
3) Left-right cabinet: φ159mm
4) Level central distance: 2,100mm
5) Hearth water cooling wall pitch: 54mm
6) Convection check distance: 81 x 84mm
7) The side wall is connected by 2 descending tubes leaded from the upper
    cylinder
8) There are 2 φ108 x 4.5 descending tubes at each side of the lower
    cylinder connected with the concentration cabinets
9) The boiler check and the water cooling wall are welded and connected 
    with the upper and lower cylinders

Combustion equipment: 
1) Light chain-grate stoker
2) Width: 1,600mm
3) Effective area: 4.8m2
4) Four independent wind storage cabinets
5) Dual-side air inlet ash door
6) Brick boiler arc
7) Front water cooling arc and level angle are 30o 
8) Outlet height: 800mm
9) Back arc outlet height: 500mm
10) Front-back arc coverage rates are 21% and 46.5%
11) The block wall is mounted at the upper outlet of the front arc to
     increase the combustion room temperature and smoke flow

Design features: 
1) After extensive selection, the vertical hose boiler is easily defined and
    symmetrical facilitating manufacture and maintenance. It is with compact
    size and low metallic consumption, great water capacity and large
    convection heat transfer coefficient 
2) To reduce the boiler wall weight, the side water cooling wall pitch is
    densely structured and gets rid of the fire-bricks. Burial boiler wall 
    increases the air-tightness 
3) Back arc and outlet block wall of the hearth are brick structured to 
    increase the temperature in addition to expanding the fuel application 
4) Manhole is not installed in the combustion ash room. Smoke flow speed
    may be increased appropriately, because the sole is mounted to exhaust
    the ash to the lower grate 
5) Front wall water cooling wall and descending tube are mounted to
    increase the rigidity of the upper part 
6) An aisle is reserved at the two sides of the convection check to reduce
    dead corners and to facilitate maintenance 
7) An examination door is reserved at the back of the left side of the 
    second convection check. If necessary, the aisle can be reached through
    the examination door 
8) Compressed shell, stylish design
9) Step-less motor and shift of the grates are necessary for the automatic
    combustion 
10) Equipped with multifunctional meter control panel; the inspection
     display meter, the water supply automatic control panel, and the coal
     combustion control panel are for manipulating rotating speed on the
     operation table 
11) Thermal data determination: subject to the determination of National
     Industrial Boiler Product Quality Inspection Center, the heated surface
     of the boiler is with reasonable configuration and large overload
     capacity. The average efficiency is 79.6%. Steam hu