Henan Leway Thermal Equipment Manufacturing Co., Ltd. can produce and manufacture various waste heat boilers; vertical waste heat boilers, waste heat power generation boilers, fire-tube quick-installed waste heat boilers, and water-tube quick-installed waste heat boilers. Customized scheme design and manufacturing according to the actual working conditions and needs of customers.
The waste heat boiler model in the above figure is Q4.1/1100-1.2-1.25, which is a typical double-drum longitudinal arrangement. It consists of upper and lower drums, membrane water walls, and convection tube bundles. The flue gas is discharged into the chimney through the convection tube bundles.
This product has the following features:
⑴ This boiler adopts double-drum arrangement, compact structure, small footprint, and good flame fullness.
⑵ The boiler adopts bottom support method and can expand freely upward.
⑶ The furnace water wall and convection flue adopt membrane wall structure, effectively reducing the use of refractory and insulation materials and maintenance workload.
⑷ This boiler adopts fully enclosed welded structure airtight inner guard plate, good furnace wall sealing performance, outer layer adopts pressed guard plate, beautiful appearance.
⑸ This boiler adopts quick-installed form, which can effectively shorten the installation period.
⑹ High thermal resistance materials are used as the insulation layer, with good thermal insulation performance.
⑺ The whole boiler is seated on a highly rigid base, convenient for installation and transportation.
⑻ The boiler has sufficient heating surface and large enough steam-water space to ensure stable boiler parameters.
⑼ Feed water adopts continuous electric regulation, and has high and low water level alarm and protection interlocking functions.
I. Main Boiler Specifications and Design Parameters
1. Boiler evaporation capacity 1.2t/h
2. Rated working pressure 1.25 MPa
3. Feed water temperature 20 ℃
4. Inlet flue gas temperature 1100 ℃
5. Inlet flue gas flow rate 4.1×10³Nm³/h
6. Overall boiler type SZS
18. Boiler large component transport dimensions 6230×1510×3371 (mm)
II. Product Structure Introduction
The upper drum has a total length of 5100mm, inner diameter φ900, wall thickness 12mm, material Q245R, and is equipped with feed water and necessary steam-water separation devices inside; the lower drum has a total length of 5100mm, inner diameter φ800, wall thickness 12mm, material Q245R, and is equipped with blowdown devices inside. The convection flues of the boiler body are all composed of membrane walls, membrane wall tubes φ51×3, pitch 100mm, convection tube bundles adopt φ51×3, material is No. 20 carbon steel.
The framework all adopts steel structure. The weight of the boiler pressure-bearing body, furnace wall and insulation layer, steel frame guard plates, etc. are all directly supported on the bottom steel frame. The furnace body is surrounded by fully enclosed welded structure airtight inner guard plates for boiler sealing.
III. Safety Valve, Auxiliary Equipment and Control Description
1. Safety valve: This boiler is equipped with A48Y-16 full-lift safety valve.
2. Feed water pump: Adopt LVR(S)2-15 boiler feed water pump to realize automatic boiler feed water.
3. Control description: In order to effectively monitor and control water level and pressure, this boiler is equipped with water level gauge, water level controller and water level alarm, as well as ordinary pressure gauge, electric contact pressure gauge and pressure controller.
This boiler has automatic water level control, high and low water level alarm and low water level interlocking protection functions, and has automatic steam pressure control, overpressure alarm and overpressure interlocking protection functions. All safety accessories and interlocking protection devices must not be withdrawn during operation. Boiler operators should regularly check and test the water level and pressure safety alarm interlocking protection devices to confirm that they can function, and if damaged, the boiler should be shut down for repair in time.
IV. Boiler feed water quality shall comply with the relevant provisions of GB/T1576-2018
Boiler water quality shall comply with the following table:
|
Item |
External chemical treatment |
Item |
Boiler water |
||
|
Feed water |
Boiler water |
||||
|
Turbidity/FTU |
≤5 |
Total alkalinity mmol/L |
4～24 |
||
|
Hardness mmol/L |
≤0.03 |
Phenolphthalein alkalinity mmol/L |
2～16 |
||
|
PH (25°C) |
7～10.5 |
10～12 |
Dissolved solids mg/L |
≤3500 |
|
|
Dissolved oxygen mg/L |
≤0.1 |
Phosphate mg/L |
10～30 |
||
|
Oil mg/L |
≤2 |
Sulfite mg/L |
10-30 |
||
|
Total iron mg/L |
≤0.3 |
Relative alkalinity |
＜0.2 |
||
|
Conductivity (25°C)/(μS/cm) |
≤5.5×10² |
||||
This waste heat boiler is a non-standard product designed for specific customer needs and is for reference only.
Leway water-tube quick-installed waste heat boilers can be customized according to customer needs: products with specifications of 0——10t/h, 0——7MW.
