CN-224230410-U - Online filling and recycling system of organic working medium for ORC (organic Rankine cycle)

Abstract

The utility model discloses an organic working medium on-line filling and recovering system for an ORC (organic Rankine cycle), which comprises a working medium recovering and filling storage tank and a variable-frequency fluorine adding pump, wherein the working medium recovering and filling storage tank is connected with a pressure balance pipeline, the pressure balance pipeline is connected with a condenser of the ORC system, the working medium recovering and filling storage tank is respectively connected with a working medium recovering pipeline and a working medium filling pipeline, the working medium recovering pipeline and the working medium filling pipeline are both connected with a connecting pipeline between a condenser and the working medium pump in the ORC system, and the variable-frequency fluorine adding pump is arranged on the working medium filling pipeline. The method has the advantages that the organic working medium is filled or recovered during the operation or maintenance of the ORC system through the automatic control logic, the performance and the stability of the ORC system are ensured, and the maintenance and repair cycle can be greatly shortened while the economy is improved.

Inventors

• YUE ZEYU
• HE PING
• LIN MINGXUAN

Assignees

• 北京华航盛世能源技术有限公司

Dates

Publication Date

20260512

Application Date

20250512

Claims (7)

1. 1. The organic working medium on-line filling and recovering system for the ORC is characterized by comprising a working medium recovering and filling storage tank and a variable frequency fluorine adding pump, wherein the working medium recovering and filling storage tank is connected with a pressure balance pipeline, the pressure balance pipeline is connected with a condenser of the ORC system, the working medium recovering and filling storage tank is respectively connected with a working medium recovering pipeline and a working medium filling pipeline, the working medium recovering pipeline and the working medium filling pipeline are both connected with a connecting pipeline between a condenser and the working medium pump in the ORC system, and the variable frequency fluorine adding pump is arranged on the working medium filling pipeline.
2. 2. The ORC organic working medium on-line charging and recycling system of claim 1, wherein the pressure balancing pipeline is provided with an automatic balancing valve.
3. 3. The ORC organic working medium on-line filling and recycling system according to claim 1 or 2, wherein a working medium recycling regulating valve is arranged on the working medium recycling pipeline.
4. 4. The ORC organic working medium on-line filling and recycling system of claim 3, wherein two manual valves are arranged on the working medium filling pipeline at intervals, and the variable frequency fluorine adding pump is arranged between the two manual valves.
5. 5. The ORC organic working medium on-line filling and recycling system of claim 4, wherein the working medium recycling pipeline and the working medium filling pipeline are provided with a check valve; The check valve on the working medium recovery pipeline is positioned at the downstream of the working medium recovery regulating valve along the flow direction of the working medium in the check valve; And the check valve on the working medium filling pipeline is positioned between the variable-frequency fluorine-adding pump and the manual valve positioned at the downstream along the flow direction of the working medium in the check valve.
6. 6. The ORC organic working medium on-line filling and recycling system of claim 1, wherein a storage tank liquid level gauge is arranged on the working medium recycling and filling storage tank.
7. 7. The on-line organic working medium filling and recycling system for ORC of claim 1, wherein at least one process reservation port is arranged on the storage tank, and a process interface valve is arranged on the process reservation port.

Description

Online filling and recycling system of organic working medium for ORC (organic Rankine cycle) Technical Field The utility model relates to the technical field of low-temperature power generation, in particular to an organic working medium on-line filling and recycling system for ORC. Background ORC is short for organic Rankine cycle, the main principle is that the Rankine cycle takes low boiling point organic matters as working media, and the ORC mainly comprises a heat source heater, a turbine generator, a condenser, a working media pump and other parts, and the working principle is that the organic working media absorb heat from waste heat flow in a heat exchanger to generate steam with certain pressure and temperature, and the steam enters a turbine to expand and apply work, so that a generator is driven or other power machines are dragged. The exhaust steam discharged from the turbine releases heat to the cooling water in the condenser, the organic working medium is condensed into liquid state, and finally the liquid state returns to the heat exchanger by means of the working medium pump, so that the liquid state is continuously circulated. The organic working medium is a medium for completing the whole ORC cycle, for example, the lack of the organic working medium in the ORC system can lead to the reduction of the power generation performance, even the ORC system cannot operate, for example, the organic working medium in the ORC system is too much, and the excessive working medium can occupy the heat exchange space in the condenser to influence the heat exchange effect of the condenser. In addition, the density of the organic working medium in the ORC system can be changed along with the temperature change of the heat source/cold source, so that the volume of the organic working medium in the ORC system can be changed along with the working condition change, for example, the cooling water temperature change caused by the larger working condition change of the heat source or the seasonal change can influence the volume of the organic working medium in the condenser, and further the performance of the generator set is influenced. The ORC system comprises a mechanical rotary moving part, heat exchanger static equipment, an inter-machine pipeline, a valve and the like, and as the operation time is increased, especially the thermal stress of the start-stop pipeline is changed, the leakage of the organic working medium of the unit frequently happens, and the leakage of the organic working medium can lead to the performance attenuation of the unit and even the stop of the unit. The replenishment of the ORC system with new working medium is often limited by the effects of procurement cycle, transportation cycle, on-site filling cycle, etc., and can cause long-time shutdown, even affect the operation of the whole process system, and finally can cause a great deal of economic loss, especially remote ORC equipment or ORC equipment in special use places of offshore platforms, and the related cycle can be further increased. In addition, when the ORC system is overhauled or parts are replaced, the organic working medium in the equipment needs to be removed, and at present, the conventional practice is to send special tools such as a movable working medium storage bottle, a fluorine inverting pump, a fluorine adding pump and the like to the site, and the recovered working medium is filled into the equipment after the overhaul, so that the workload of the whole overhaul process is large and the construction period is long. Disclosure of utility model The utility model aims to provide an organic working medium on-line filling and recycling system for ORC, so as to solve the problems in the prior art. In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows: The organic working medium on-line filling and recovering system for the ORC comprises a working medium recovering and filling storage tank and a variable frequency fluorine adding pump, wherein a pressure balance pipeline is connected to the working medium recovering and filling storage tank, the pressure balance pipeline is connected with a condenser of the ORC system, the working medium recovering and filling storage tank is respectively connected with a working medium recovering pipeline and a working medium filling pipeline, the working medium recovering pipeline and the working medium filling pipeline are both connected to a connecting pipeline between a condenser and the working medium pump in the ORC system, and the variable frequency fluorine adding pump is arranged on the working medium filling pipeline. Preferably, an automatic balance valve is arranged on the pressure balance pipeline. Preferably, the working medium recovery pipeline is provided with a working medium recovery regulating valve. Preferably, two manual valves are arranged on the working medium filling pipeline at intervals, and the variable-freq