Multistage Industrial Back Pressure Steam Turbine Generator Plant for Steel Chemical Industry

• Customization: Available
• After-sales Service: Supported
• Warranty: 1year
• Model NO.: B1.5-2.35/0.49
• Power: 1.5MW
• Generator Type: Synchronous Generator
• Certification: CCC, ISO, TLC, CE
• Standard: Nonstandard
• Inlet Pressure: 2.35MPa
• Inlet Temperature: 390ºC
• Speed: 6500 or 3000 R/Min
• OEM & ODM: Available
• Steam Intake: 20t/H
• Steam Consumption: 13.33kg/Kg.W
• Transport Package: Woden Case with Film
• Trademark: Anhui ZhengYuFeng
• Origin: Anhui Wuhu
• HS Code: 840682
• Production Capacity: 100 Units Per Year

Product Description

 

Product Parameters

Type of Steam Turbine	Back-Pressure Steam Turbine Generator
Model No. of Steam Turbine	B1.5-2.35/0.49
Rated Powder	MW	3
Rated Speed	r/min	3000
Rated Steam Inlet Pressure & Variation Range	Mpa(a)	0.981
Rated Steam Inlet Temperature & Variation Range	ºC	280
Rated Steam Inlet Flow	T/H	49.8
Steam Consumption Under Rated Conditions	kg/kw.h	16.6
Max Component Weight	tons	~12
Dimension	m	3.84*2.2*2.01
OEM service is available. According to customer's parameters requirement. We can customize R&D, produce and supply steam turbines.

 

Other Models Available

Model	Power (MW)	Steam Inlet Parameters		Steam Consumption (kg/kw.h)	Steam Intake (T/H)	Speed (r/min)
		Pressure (Mpa)	Temperatures (ºC)
B1.5-3.43/0.981	1.5	3.43	435	14.2	21.3	6500/3000
B1.5-4.9/0.981	1.5	4.9	470	11.9	17.85	6500/3000
B1.2-2.35/0.49	1.5	2.35	390	13.33	20	6500/3000
B3-0.98/0.245	3	0.981	280	16.6	49.8	6500/3000

 

Generator Parameters

Dynamo					Exciter
Model	Capacity (KVA)	Voltage (V)	Power Factor	Efficiency	Power (kW)	Voltage (V)
QFK-3-2	3750	6300	0.8	95.3	30	100
		3150
QF-3-2	3750	10500	0.8	95.3	30	100
		6300
QF-6-2	7500	10500	0.8	96.4	45	150
		6300
QF-7-2	8750	10500	0.8	97	45	150
		6300
QF-12-2	15000	10500	0.8	97	65	230
		6300
QF-15-2	18750	10500	0.8	97	65	230
		6300
QF-25-2	31250	10500	0.8	97.4	105	230
		6300
QF-30-2	37500	10500	0.8	97.6	105	230
		6300

Product Description

Backpressure steam turbine is a type of steam turbine where the exhaust steam pressure is intentionally maintained above atmospheric pressure. Unlike condensing turbines (which exhaust steam at low pressure into a condenser), backpressure turbines discharge steam at a higher pressure, allowing the exhaust steam to be reused for process heating or district heating purposes. This design makes them highly efficient in combined heat and power (CHP) systems.

Working Principle of Back Pressure Turbines

A back pressure turbine is a type of steam turbine where the exhaust steam exits at a pressure higher than atmospheric pressure, rather than being condensed. The core principle involves:

 

1. Steam Energy Conversion: High-pressure steam from a boiler enters the turbine, expanding through blades to convert thermal energy into rotational mechanical energy.
2. Non-Condensing Exhaust: Instead of releasing steam to a condenser, the turbine discharges steam at a specified back pressure (e.g., 0.3-1.5 MPa), which is then used for industrial process heating, district heating, or other thermal applications.
3. Direct Energy Utilization: The turbine's output shaft powers generators or mechanical equipment (e.g., pumps, compressors), while the exhaust steam provides useful heat, creating a combined power and heat system.

Key Advantages of Back Pressure Turbines

1. High Energy Efficiency
   • Convert steam energy into both mechanical power and usable heat, minimizing energy loss (unlike condensing turbines that reject heat to the environment).
   • Achieve overall energy efficiency up to 80-90%, compared to 30-40% for typical condensing power plants.
2. Simple System Design
   • Eliminate the need for condensers, cooling systems, and related auxiliary equipment, reducing capital costs and maintenance requirements.
   • Compact structure with fewer components, suitable for space-constrained installations.
3. Flexible Heat-Power Integration
   • Tailor exhaust steam pressure to match specific process heat demands (e.g., drying, distillation, heating networks).
   • Ideal for industries requiring simultaneous power and thermal energy (e.g., refineries, chemical plants, sugar mills).
4. Cost-Effective Operation
   • Lower water consumption (no condenser cooling water needed), reducing water treatment and disposal costs.
   • Efficient use of fuel (e.g., coal, natural gas) as both energy forms are utilized, lowering operational expenses.
5. Reliable and Low Maintenance
   • Fewer moving parts and simpler systems lead to higher reliability and longer service life.
   • Reduced maintenance needs for condensers, cooling towers, and related components.
6. Environmental Benefits
   • Lower greenhouse gas emissions per unit of energy produced due to higher fuel utilization.
   • Minimize water pollution from cooling system discharges, as no condenser is required.

YTS's Technical Advantages

1. The multi-stage impulse steam turbine has 2 to 4 more pressure stages than that of other manufacturers. The stage distance is reduced to allocate more stages in the flow part, the enthalpy drop of each stage is reduced. The diameter of flow structure is reduced, thus the blade height loss is significantly reduced. This technology was selected and listed in 2019 National Recommended Catalogue, Guideline and Cases of Industrial Energy-Saving Technologies and Equipments, released by Chinese Ministry of Industry and Information Technology.

2. Monolithic forged rotor assembly adopts whole forging method and it's a rigid rotor. The integration of the impeller and the shaft increases the safety and stability of operation. The blade profile is optimized and the partition is synchronously matched.

3. Reduce the rotor diameter and increase the blade length, compress various contact gaps to reduce steam leakage and make the steam act to the maximum extent, thereby to achieve high efficiency and more electricity generation under the same working conditions.

4. Add a sleeve cylinder, usually in casting or forging type, reinforced with a partition sleeve, and works with the newly added pressure stage and partition to increase the working air tightness of the new pressure stage, reduce air leakage and enhance operation safety, thus improve the working capacity of the unit;

5. Increase the length and quantity of comb-teeth steam seal from original 36 teeth to 45 teeth, and the tooth height is also increased, which effectively reduces steam leakage;

6. Comparing with similar steam extraction back pressure units from domestic market, it can improve efficiency by 10% to 30%, reduce the unit dimension and occupy less space at the same time. The optimization of the flow structure enables the unit to produce more power under the same working conditions, thus generate energy-saving economic benefits.

 

Detailed Photos

FAQ

1. Question: How to determine product parameters?
Reply: Design steam turbine units with different working conditions according to the customer's current production technical parameters to meet production needs.
2. Question: How to determine product quality?
Reply: You can do it through on-site field visits and provide relevant inspection and testing reports and other materials.
3. Question: How to ensure after-sales service?
Reply: The company's technical staff solves difficult problems online and offline.