1. Core Definition and Heating Capacity

A 58MW hot water boiler is a large-scale thermal energy device with a rated heating capacity of 58 megawatts. According to standard calculations, it can generate 58,000,000 kilojoules of heat per hour. Based on the estimated heating area, it can cover approximately 580,000 square meters (simplified calculation, assuming 1MW heating capacity per 10,000 square meters). This device is widely used in central heating systems in northern China, heat source stations in industrial parks, and large public buildings (such as hospitals and schools).

2. Technical Classification and Typical Boiler Types

Based on fuel type, 58MW hot water boilers can be divided into four categories, each corresponding to different application scenarios:

Gas-fired hot water boilers
Representative models: SZS58-1.6/130/70-Q
Parameters: Rated pressure 1.6MPa, outlet water temperature 130°C, return water temperature 70°C
Fuel compatibility: Clean gas fuels such as natural gas, biogas, and liquefied petroleum gas
Technical Advantages: Utilizing full-membrane water-cooled wall technology, the furnace chamber maintains excellent sealing, with an outer wall temperature below 35°C (within +10°C of ambient temperature), minimizing heat loss. Equipped with a PLC/DCS control system, the boiler offers a load adjustment range of 30%-110%, supporting rapid start and stop operations to adapt to fluctuating heating demand. Coal-fired Hot Water Boiler
Representative Models: DZL58-1.25/130/70-AⅡ, DHL58-1.6/150/90-AⅡ
Parameters: Pressure 1.25-1.6 MPa, Water Outlet Temperature 130°C-150°C
Fuel Compatibility: Bituminous coal, anthracite, lean coal, and other solid fuels
Innovative Design: Shanxi Lantian Environmental Protection's vertical boiler utilizes a dual-furnace design with a folded flue gas pipe, saving 30% steel, reducing system resistance, and lowering power consumption. The swirl burner is located on the furnace sidewall to prevent the flame from eroding the water-cooled wall. The slag discharge port is optimized for smooth slag discharge. Biomass Hot Water Boiler
Representative Model: DZL58-1.25/130/70-SCⅢ
Parameters: Pressure 1.25 MPa, Outlet Water Temperature 130°C
Fuel Compatibility: Renewable fuels such as biomass pellets, wood chips, and straw
Environmental Benefits: Utilizes fluidized bed combustion technology for wide fuel compatibility, with nitrogen oxide emissions ≤30 mg/Nm³, meeting ultra-low emission standards.
Circulating Fluidized Bed Hot Water Boiler
Representative Models: SHX58-1.25/130/70-AⅠ, QXX58-1.25/130/70-AⅡ
Parameters: Pressure 1.25 MPa, Outlet Water Temperature 130°C
Technical Highlights: Gas-solid two-phase fluidized combustion offers excellent fuel compatibility, including the ability to blend low-calorific-value fuels such as gangue and sewage sludge. The H-shaped finned tube tail heating surface design ensures an exhaust temperature ≤90°C and a thermal efficiency ≥95%.

3. Key Performance Indicators and Optimization Directions

Thermal Efficiency and Combustion Control
Testing Standards: Complete combustion is achieved when the CO content in flue gas is ≤50 ppm and the O₂ content is ≤3.5%; nitrogen oxide emissions must be ≤30 mg/Nm³ (stricter requirements apply in some regions).
Energy-Saving Technologies: Lightweight fiber furnace wall insulation (external wall temperature ≤45°C), optimized economizer layout (increased heating surface), and intelligent combustion control system (full proportional control + ultraviolet flame detection).
Operational Stability and Safety
Pressure Control: The boiler body design pressure is ≥1.6 MPa, equipped with a pressure safety valve and water level monitoring device to prevent dry burning or overpressure.
Noise Control: Noise level ≤50 dB(A) at 1 meter from the equipment, meeting urban environmental noise standards.
Economics and Maintenance Costs
Energy Consumption Comparison: Gas-fired boilers consume approximately 2500 kWh/hour. Coal-fired boilers have lower operating costs due to lower fuel prices, but dust removal and desulfurization costs must be considered. Maintenance Cycle: Circulating fluidized bed boilers require regular cleaning of the fluidized bed air distribution plates, while gas-fired boilers require less frequent maintenance, primarily involving burner overhaul.

4. Typical Application Cases

Xinbarag Right Banner Heating Project, Inner Mongolia
Equipment Model: 58MW Circulating Fluidized Bed Hot Water Boiler
Application Results: By blending 30% coal gangue, fuel costs were reduced by 25%, exhaust temperature was controlled at 85°C, and thermal efficiency reached 94%.
Heat Source Station in an Industrial Park in Dalian
Equipment Model: SZS58-1.6/130/70-Q Gas-Fired Boiler
Application Results: Fully automated control is used, with a load adjustment response time of ≤30 seconds and an average failure rate of less than 0.5% during the heating season.

5. Selection and Procurement Recommendations

Fuel Compatibility: Fuel type should be selected based on local resource conditions. Gas-fired boilers are preferred in areas with natural gas coverage, while coal-fired or circulating fluidized bed boilers can be used in areas with abundant coal resources. Emission Requirements: Strictly adhere to the "Boiler Air Pollutant Emission Standard" (GB 13271-2014). For ultra-low emission areas, select boilers equipped with SNCR denitrification systems.
Supplier Selection: Prioritize manufacturers with Class A boiler manufacturing qualifications and full lifecycle services (including installation, commissioning, and personnel training), such as Wuxi Zhongzheng Boiler Co., Ltd. and Zhengzhou Boiler Co., Ltd.