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System and method for efficiently generating power from steam

A power generation system and water vapor technology, which is applied in steam applications, steam engine devices, machines/engines, etc., can solve the problems of large cooling power consumption, waste of latent heat of water vapor, and no water vapor utilization, and achieve effective utilization and improved utilization. rate effect

Active Publication Date: 2013-08-28
SHANGHAI POWER TECH SCREW MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The disadvantages of the above-mentioned excess pressure water vapor utilization scheme are: firstly, the above-mentioned scheme needs to consume a large amount of cooling work in order to cool the water vapor; secondly, the above-mentioned scheme wastes the latent heat of water vapor at the same time, and does not make more effective use of water vapor

Method used

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  • System and method for efficiently generating power from steam
  • System and method for efficiently generating power from steam
  • System and method for efficiently generating power from steam

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Embodiment 1

[0034] see figure 2 , the present invention discloses a high-efficiency power generation system for water vapor. The system includes a first power generation system and a second power generation system. The first power generation system includes one or more first power generation devices, and the second power generation system includes one or more An organic Rankine cycle system. In this embodiment, the first power generation system includes a first power generation device, and the second power generation system includes an organic Rankine cycle system.

[0035] The first power generation device includes a steam expander 7, a first generator 8 connected to the steam expander 7, steam with pressure (steam is superheated or saturated steam, usually residual pressure steam, Its pressure is generally required to be greater than or equal to 2 barG, that is, the gauge pressure per square centimeter is 2 kg) connected to the inlet of the steam expander 7, and the steam expander 7 u...

Embodiment 2

[0041] see image 3The difference between this embodiment and Embodiment 1 is that in this embodiment, the first power generation system includes a plurality of first power generation devices connected in series, and the second power generation system includes a plurality of organic Rankine cycle systems connected in series.

[0042] The steam with pressure is connected to the inlet of the steam expander 7 of the first power generation device as the first stage, and the water vapor is discharged from the outlet of the steam expander 7 of the first power generation device as the last stage, and enters the second power generation system, The pressure of the water vapor discharged from the last-stage steam expander 7 is greater than or equal to -0.6 barG and less than or equal to 1 barG.

[0043] The evaporators 3 of each organic Rankine cycle system are sequentially connected in series to form multi-stage expansion; except for the last stage, the pressure of the water vapor disc...

Embodiment 3

[0057] see Figure 4 , The difference between this embodiment and Embodiment 1 is that in this embodiment, the first power generation system includes a plurality of parallel first power generation devices, and the second power generation system includes a plurality of organic Rankine cycle systems, some of which are organic Rankine cycle systems. Ken circulation system in parallel.

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Abstract

The invention discloses a system and a method for efficiently generating power from steam. The system comprises a first power generation system and a second power generation system; each first power generation assembly comprises a steam expansion machine and a first power generator, steam with pressure is filled into inlets of the steam expansion machines of the first power generation system, and the steam expansion machines drive the first power generators to generate the power by the aid of the steam with the pressure; each organic Rankine cycle system comprises a condenser, a liquid pump, an evaporator, a first expansion machine and a second power generator, and the condenser, the liquid pump, the evaporator and the second expansion machine are sequentially connected with one another to form a cycle; and the second expansion machines drive the second power generators to generate the power by the aid of steam from the first power generation system. The system and the method for efficiently generating the power from the steam have the advantages that the expansion machines drive the power generators to generate the power by the steam with pressure at first, then the steam discharged from the expansion machines is utilized to generate the power again by the aid of each OCR (organic Rankine cycle), accordingly, the steam with the pressure can be effectively utilized for generating the power, and the steam utilization rate is increased.

Description

technical field [0001] The invention belongs to the technical field of residual pressure steam utilization, and relates to a power generation system, in particular to a high-efficiency steam power generation system; at the same time, the invention also relates to a high-efficiency steam power generation method. Background technique [0002] Water vapor under pressure has relatively more energy, and now the use of water vapor under pressure is generally realized through the condensing scheme. [0003] see figure 1 , figure 1 The composition of the existing steam power generation system is shown. Such as figure 1 As shown, the steam under pressure passes through the inlet of the steam expander 7', and the steam expander 7' utilizes the steam under pressure to drive the generator 8' to generate electricity. The water vapor discharged from the outlet of the steam expander 7' is usually lower than the atmospheric pressure; then, the water vapor discharged from the outlet of t...

Claims

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Application Information

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IPC IPC(8): F01K17/04F01K23/02
Inventor 汤炎
Owner SHANGHAI POWER TECH SCREW MACHINERY
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