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Boiler flue gas waste-heat utilization system based on organic Rankine cycle

A boiler flue gas and Rankine cycle technology, which is applied to furnaces, waste heat treatment, furnace components, etc., can solve problems such as public reports on the control problem of the deep utilization system of boiler flue gas waste heat, and achieve simple structure and ensure stability. performance, ease of implementation

Inactive Publication Date: 2014-12-03
NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Since the relevant research and engineering application are still in their infancy, there is no public report on the control of the deep utilization system of boiler flue gas waste heat based on organic Rankine cycle.

Method used

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  • Boiler flue gas waste-heat utilization system based on organic Rankine cycle
  • Boiler flue gas waste-heat utilization system based on organic Rankine cycle

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Embodiment Construction

[0030] The preferred embodiments will be described in detail below in conjunction with the accompanying drawings. It should be emphasized that the following description is only exemplary and not intended to limit the scope of the invention and its application.

[0031] The production flow chart of the present invention is as figure 1 shown.

[0032] The present invention includes a first detection transmitter 1, a second detection transmitter 2, a third detection transmitter 3, a fourth detection transmitter 4, a fifth detection transmitter 5, and a sixth detection transmitter 6 , flue gas flow regulating valve 7, bypass regulating valve 8, evaporator 9, expander 10, condenser 11, fan 12, liquid receiver 13 and pump 14;

[0033] The inlet of the flue gas flow regulating valve 7 is connected to the boiler flue gas inlet; the outlet of the flue gas flow regulating valve 7 is respectively connected to the bypass regulating valve 8 and the evaporator 9; the bypass regulating val...

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Abstract

The invention discloses a boiler flue gas waste-heat utilization system based on organic Rankine cycle, which belongs to the technical field of the process control. The boiler flue gas waste-heat utilization system is composed of a flue gas flow control subsystem, an organic working-medium flow control subsystem and an air flow control subsystem, wherein the flue gas flow control subsystem adopts a cascading and feed-forward control structure, the temperature of the flue gas at an outlet of an evaporator is adjusted by controlling the flue gas flow, and the influence of the temperature disturbance on a flue gas inlet is eliminated by a feed-forward step; the organic working-medium flow control subsystem adopts a change ratio value control structure and the working-medium flow is adjusted to proportionally change with the flue gas flow during the operation process; and the air flow control subsystem adopts a feedback control structure and the air flow in a condenser is changed to adjust the temperature of the working medium at an outlet of the condenser to a reset value. The structure of the boiler flue gas waste-heat utilization system is simple, the construction is convenient, and the stability, economical efficiency and safety of the waste-heat utilization process are ensured.

Description

technical field [0001] The invention belongs to the technical field of process control, and in particular relates to a boiler flue gas waste heat utilization system based on an organic Rankine cycle. Background technique [0002] According to the country's energy development strategy, improving the utilization efficiency of primary energy is an important task. At present, the operating efficiency of boiler bodies in my country has been greatly improved, but from the perspective of energy cascade utilization, boilers still have usable energy in the high-temperature flue gas discharged after combustion. For this reason, research on the deep utilization of boiler flue gas waste heat has been widely carried out, and a representative type of research is: Boiler low-temperature flue gas waste heat system based on organic Rankine cycle. [0003] The process flow of boiler low-temperature flue gas waste heat utilization process based on organic Rankine cycle is shown in the appendi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F01K13/00F01K13/02F01K25/10F27D17/00
CPCY02P10/25
Inventor 张建华房方周业里高松侯国莲
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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