Combined cycle unit and non-oxygen-consuming energy storage system thereof

Abstract

A non-oxygen-consuming energy storage system includes: an interconnecting pipe, connecting a heat recovery boiler or a flue gas header to a chimney or its flue gas duct; a gas inducing equipment along the interconnecting pipe, inducing gas inside the heat recovery boiler to enter the interconnecting pipe through the chimney and then enter the heat recovery boiler; and a heater along the interconnecting pipe and heating up the gas in the interconnecting pipe, and using electricity or other non-oxygen-consuming heating devices as a heat source. Thereby, the gas in the heat recovery boiler is circulated and heated up by the system, and pipelines and components of each unit are kept in a hot standby condition, thus under an emergency power demand on the power grid, the combined cycle unit can rapidly ramp up its load to meet the demand, and can also reduce energy consumption during start-up stage.

What is claimed is: 
     
         1 . A non-oxygen-consuming energy storage system, comprising:
 an interconnecting pipe used to connect a heat recovery boiler or a flue gas header to a chimney, or connect the heat recovery boiler and a flue gas duct of the chimney;   a gas inducing equipment, which is installed along the interconnecting pipe, is used to induces gas inside the heat recovery boiler to enter the interconnecting pipe through the chimney, and is used to force the gas in the interconnecting pipe to enter an interior of the heat recovery boiler; and   a heater installed along the interconnecting pipe and used to heat up the gas in the interconnecting pipe.   
     
     
         2 . The non-oxygen-consuming energy storage system according to  claim 1 , further comprising at least one damper, wherein the at least one damper is installed along the interconnecting pipe and used to control flow of gas through the interconnecting pipe. 
     
     
         3 . The non-oxygen-consuming energy storage system according to  claim 2 , wherein the at least one damper is located between the gas inducing equipment and the chimney. 
     
     
         4 . The non-oxygen-consuming energy storage system according to  claim 2 , wherein the non-oxygen-consuming energy storage system comprises two dampers, one of the dampers is located between the gas inducing equipment and the chimney or the flue gas duct, and another of the dampers is located between the heater and the heat recovery boiler or the flue gas header. 
     
     
         5 . The non-oxygen-consuming energy storage system according to  claim 1 , wherein the heater is located between the heat recovery boiler or the flue gas header and the gas inducing equipment. 
     
     
         6 . The non-oxygen-consuming energy storage system according to  claim 2 , wherein the heater is located between the heat recovery boiler or the flue gas header and the gas inducing equipment. 
     
     
         7 . The non-oxygen-consuming energy storage system according to  claim 3 , wherein the heater is located between the heat recovery boiler or the flue gas header and the gas inducing equipment. 
     
     
         8 . The non-oxygen-consuming energy storage system according to  claim 4 , wherein the heater is located between the heat recovery boiler or the flue gas header and the gas inducing equipment. 
     
     
         9 . A combined cycle unit, comprising:
 a gas turbine module;   a boiler module, which includes a heat recovery boiler, a flue gas header and a chimney, wherein the flue gas header connects the gas turbine module and the heat recovery boiler, and the chimney is installed on the heat recovery boiler or installed outside the heat recovery boiler, and is connected to the heat recovery boiler through a flue gas duct; and   a non-oxygen-consuming energy storage system, which includes an interconnecting pipe, a gas inducing equipment and a heater, wherein the interconnecting pipe connects the heat recovery boiler or the flue gas header to the chimney or the flue gas duct, the gas inducing equipment is installed along the interconnecting pipe, is used to induces gas inside the heat recovery boiler to enter the interconnecting pipe through the chimney, and is used to force the gas in the interconnecting pipe to enter an interior of the heat recovery boiler, and the heater is installed along the interconnecting pipe and used to heat up the gas in the interconnecting pipe.   
     
     
         10 . The combined cycle unit according to  claim 9 , wherein the non-oxygen-consuming energy storage system further includes at least one damper, and the at least one damper is installed along the interconnecting pipe and used to control flow of gas through the interconnecting pipe. 
     
     
         11 . The combined cycle unit according to  claim 10 , wherein the at least one damper is located between the gas inducing equipment and the chimney. 
     
     
         12 . The combined cycle unit according to  claim 10 , wherein the non-oxygen-consuming energy storage system includes two dampers, one of the dampers is located between the gas inducing equipment and the chimney or the flue gas duct, and another of the dampers is located between the heater and the heat recovery boiler or the flue gas header. 
     
     
         13 . The combined cycle unit according to  claim 9 , wherein the heater is located between the heat recovery boiler and the gas inducing equipment. 
     
     
         14 . The combined cycle unit according to  claim 10 , wherein the heater is located between the heat recovery boiler and the gas inducing equipment. 
     
     
         15 . The combined cycle unit according to  claim 11 , wherein the heater is located between the heat recovery boiler and the gas inducing equipment. 
     
     
         16 . The combined cycle unit according to  claim 12 , wherein the heater is located between the heat recovery boiler and the gas inducing equipment.