Wide-load heat supply energy-saving system of back pressure type small turbine drive water supply pump
An energy-saving system, back-pressure technology, applied in heating systems, hot water central heating systems, household heating, etc., can solve the problem of poor flexibility in narrow-load operation, lack of electrical load peak shaving energy, and generator set extraction steam supply. Poor thermal economy and other problems, to achieve the effect of improving work output capacity, ensuring safe start and accident shutdown functions, and stabilizing heat supply
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specific Embodiment 1
[0026] refer to figure 1 The wide-load heat supply and energy-saving system of the back-pressure small steam turbine driving the feed water pump shown includes the main steam turbine, the back-pressure small steam turbine 62, the feed water pump 5, the boiler reheater 4, the deaerator 7 and the low-pressure heater 8, The main steam turbine is equipped with a high-pressure cylinder 1 and a medium-pressure cylinder 2. The exhaust end of the high-pressure cylinder 1 is connected to the steam inlet end of the boiler reheater 4 through a high-temperature exhaust pipe 101, and one of the outlet ends of the boiler reheater 4 is connected to The steam inlet end of the medium-pressure cylinder 2 constitutes a reheat circuit; the second steam outlet end of the boiler reheater 4 is connected to the steam inlet end of the back-pressure small steam turbine 62 through a sub-high temperature steam pipe 111 to form a back-pressure small steam turbine. Heat supply circuit; the power output end...
specific Embodiment 2
[0028] refer to figure 2 As shown, the technical feature of this embodiment is that the water pump 5 is two 50% capacity feedwater pumps, and the two 50% capacity feedwater pumps supply water to two back pressure small steam turbines 62 respectively. The rest are the same as in Example 1.
specific Embodiment 3
[0029] refer to image 3As shown, the technical features of this embodiment are: the heat supply pipe network 501 communicates with the third exhaust port of the medium-pressure cylinder 2 and the steam inlet end of the low-pressure heater 8 through the steam extraction pipe 201, forming a structure for heating condensed water and The extraction and admission steam structure of the heating circuit. The heat supply pipe network 501 is connected to the steam extraction pipe 203 through a switching pipe 502, and the switching pipe 502 is connected to the heat recovery circuit through the steam extraction pipe 203 to form a low-load high heat recovery balance pipe. The feed water pump 5 is a 100% capacity feed water pump. The low pressure heater 8 is a 100% capacity heater. All the other are with embodiment 1.
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