Steam turbine retrofitting can make full use of productivity and mechanical raw materials, and can help producers to complete relevant production needs in a timely and effective manner. People can use steam turbine retrofitting to get help in many aspects, such as providing energy for factory production needs, using existing technical conditions to carry out retrofitting of steam turbine, improving use efficiency, reducing energy consumption, bringing more economic and social benefits to enterprises or individuals, and promoting rapid development of productivity and society.

Retrofit of Power Plant with super-critical pressure four casings four exhausts impulse 500MW turbine generating units

(1) Pre-retrofit and post-retrofit technical data comparison

(2) Scope of replacement for the retrofit of steam path components

The scope of replacement for the retrofit of steam path components is illustrated in color as below：

(3) Execution of the retrofit project

• To check and accept the efficiency of casings and level of heat rate in strict conformity with the ITP specification of ASME PTC6-1996.

• Lead time: 12---15 months

• Period of retrofit activities at site: 90---100 days.

(4) Result of retrofit

• The heat rate of steam turbine is to decrease appr. 550KJ/KWh. The coal consumption is to decrease 22g/kwh.

• Annual standard coal saving: approximately 60,000.- tons (based on the annual usage rate of 5000 hours)

• Annual reduction of CO2 emission: appr. 150,000.- tons (based on the annual usage rate of 5000 hours)

• Annual increase of power generation: 250 million KWh (based on the annual usage rate of 5000 hours)

• Payback period of investment: ~ 2 years.

Retrofit of Power Plant with super-critical pressure three casings double exhausts impulse 320MW turbine generating units

(1) Pre-retrofit and post-retrofit technical data comparison

(2) Scope of replacement for the retrofit of steam path components

The scope of replacement for the retrofit of steam path components is illustrated in color as below:

(3) Execution of the retrofit project

• To check and accept the efficiency of casings and level of heat rate in strict conformity with the ITP specification of ASME PTC6-1996.

• Lead time: 12---15 months

• Period of retrofit activities at site: 70---90 days.

(4) Result of retrofit

• The heat rate of steam turbine is to decrease appr. 640KJ/KWh. The coal consumption is to decrease 25g/kwh.

• Annual standard coal saving: approximately 40,000.- tons (based on the annual usage rate of 5000 hours)

• Annual reduction of CO2 emission: appr. 108,000.- tons (based on the annual usage rate of 5000 hours)

• Annual increase of power generation: 100 million KWh (based on the annual usage rate of 5000 hours)

• Payback period of investment: 2～3 years.

Retrofit of Power Plant with sub-critical pressure three casings three exhausts impulse 300MW turbine generating units

(1)Pre-retrofit and post-retrofit technical data comparison

(2) Scope of replacement for the retrofit of steam path components

The scope of replacement for the retrofit of steam path components is illustrated in color as below:

(3) Execution of the retrofit project

• To check and accept the efficiency of casings and level of heat rate in strict conformity with the ITP specification of ASME PTC6-1996.

• Lead time: 11---12 months

• Period of retrofit activities at site: about 70 days.

(4) Result of retrofit

• The heat rate of steam turbine is to decrease appr. 410KJ/KWh. The coal consumption is to decrease 16g/kwh.

• Annual standard coal saving: approximately 25,600.- tons (based on the annual usage rate of 5000 hours)

• Annual reduction of CO2 emission: appr. 69,000.- tons (based on the annual usage rate of 5000 hours)

• Annual increase of power generation: 100 million KWh (based on the annual usage rate of 5000 hours)

• Payback period of investment: 2～3 years.

Retrofit of HP & IP casing of Power Plant with high pressure three casings double exhausts impulse 200MW turbine generating units

(1) Pre-retrofit and post-retrofit technical data comparison

(2) Scope of replacement for the retrofit of steam path components

The scope of replacement for the retrofit of steam path components is illustrated in color as below:

(3) Execution of the retrofit project

• To check and accept the efficiency of casings and level of heat rate in strict conformity with the ITP specification of ASME PTC6-1996.

• Lead time: 9---11 months

• Period of retrofit activities at site: about 55 days.

(4) Result of retrofit

• The heat rate of steam turbine is to decrease appr. 243KJ/KWh. The coal consumption is to decrease 10.4g/kwh.

• Annual standard coal saving: approximately11,000.- tons (based on the annual usage rate of 5000 hours)

• Annual reduction of CO2 emission: appr. 29,700.- tons (based on the annual usage rate of 5000 hours)

• Annual increase of power generation: 40 million KWh (based on the annual usage rate of 5000 hours)

• Payback period of investment: 2～3 years.