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Multi-pressure steam compensation type low-boiling-point organic working medium Rankine cycle system

A circulatory system, low boiling point technology, applied in steam engine installations, mechanical equipment, machines/engines, etc., can solve the problems of reduced working fluid expansion ratio, increased turbine exhaust temperature, and insufficient utilization of waste heat, etc. To achieve the effect of increasing the output power

Inactive Publication Date: 2014-04-30
SHANDONG QINGNENG POWER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, similar to the steam power cycle, the working fluid pressure of the ORC power cycle is also limited by the node temperature difference and evaporation temperature; increasing the working fluid pressure will reduce the heat absorption of the working fluid from flue gas or hydrothermal fluid, and the waste heat recovery rate will decrease; Reducing the pressure of the working fluid will lead to a decrease in the expansion ratio of the working fluid, an increase in the temperature of the exhaust steam from the turbine, and the waste heat absorbed by the working fluid will not be fully utilized.

Method used

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  • Multi-pressure steam compensation type low-boiling-point organic working medium Rankine cycle system

Examples

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Embodiment 1

[0024] Example 1: Such as figure 1 As shown, a dual-pressure supplementary steam type low-boiling organic working fluid Rankine cycle system mainly uses 100-350℃ hydrothermal fluid or flue gas, and uses a low-boiling organic working fluid as the working fluid of the Rankine cycle. The two-stage evaporator fully absorbs and utilizes the waste heat of the hot liquid or flue gas step by step, and the generated steam enters the supplementary steam ORC turbine 1 to expand and perform work to drive the generator 2 or other equipment to rotate.

[0025] The supplemental steam ORC turbine 1 is a multi-stage axial flow turbine with one supplementary steam port, allowing two organic working fluid steams of different pressures to enter the same set of turbines for work.

[0026] The evaporator includes a high-pressure evaporator 10 and a low-pressure evaporator 7 respectively communicating with the supplementary steam port of the supplementary steam ORC turbine 1, and the high-pressure evapora...

Embodiment 2

[0037] Example 2: Such as figure 2 As shown, on the basis of the above-mentioned embodiment 1, a medium-pressure evaporator 15 is connected in series between the high-pressure evaporator 10 and the low-pressure evaporator 7; the outlet end of the medium-pressure evaporator 15 is connected to the supplementary steam supply ORC turbine 1 The steam port is connected; an intermediate pressure preheater 14 is also connected between the high pressure preheater 9 and the low pressure preheater 6; the inlet end of the intermediate pressure preheater 14 and the inlet end of the high pressure preheater 9 are connected through a pipeline, A medium-pressure working fluid pump 16 is installed on the pipeline.

[0038] Compared with the double-pressure supplementary steam type low-boiling organic working medium Rankine cycle of Example 1, the medium-pressure preheater 14, the medium-pressure evaporator 15 and the medium-pressure working medium pump 16 are added, and three-pressure two-supply...

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Abstract

The invention discloses a multi-pressure steam compensation type low-boiling-point organic working medium Rankine cycle system. Hot liquid or smoke at 100 DEG C to 350 DEG C is mainly used by the system, a low-boiling-point organic working medium serves as working fluid of a Rankine cycle, full absorption and gradient utilization of waste heat of the hot liquid or the smoke are achieved through at least two levels of evaporators, and generated steam enters a steam compensation type ORC turbine and acts in an expanding mode so that an electric generator or other devices can be dragged to rotate. According to the multi-pressure steam compensation type low-boiling-point organic working medium Rankine cycle system, a heat source of the hot liquid or the smoke at the medium and low temperature of 100 DEG C to 350 DEG C is efficiently utilized and compared with a common ORC, the net output power of a device is increased by about 30%.

Description

Technical field [0001] The invention relates to a high-efficiency power device for recovering waste heat resources such as flue gas or hydrothermal fluid at a temperature of 100 to 350°C. Specifically, it relates to a multi-pressure supplementary steam type low boiling point organic working fluid Rankine cycle system, which belongs to fluid Machinery field. Background technique [0002] In the industrial production process, there is a large amount of waste heat of the medium and low temperature liquid or flue gas at 100~350℃. According to statistics, nearly 60-65% of my country's industrial energy is converted into waste heat resources, of which medium and low temperature waste heat with a temperature below 350°C accounts for about 60% of the total waste heat. This waste heat mainly exists in the state of hydrothermal and flue gas, which is a low-grade heat source. At present, only a very small number of them are recycled and most of them are directly discharged into the atmosph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01K27/02F01K25/10
Inventor 李春国陈有滨贾华正李明芹
Owner SHANDONG QINGNENG POWER
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