CN212296520U - ORC power generation device with automatic liquid level adjustment function - Google Patents
ORC power generation device with automatic liquid level adjustment function Download PDFInfo
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- CN212296520U CN212296520U CN202021175343.9U CN202021175343U CN212296520U CN 212296520 U CN212296520 U CN 212296520U CN 202021175343 U CN202021175343 U CN 202021175343U CN 212296520 U CN212296520 U CN 212296520U
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Abstract
The utility model discloses an ORC power generation device with automatic liquid level adjustment, which comprises an evaporator, an expander, a condenser and a working medium pump which are connected in sequence through a main pipeline; the evaporator is connected with an external heat source, and an evaporator liquid level meter is mounted on the evaporator; a main path regulating valve is arranged between the evaporator and the working medium pump; a bypass pipeline is arranged between the output end of the expansion machine and the output end of the working medium pump, and a bypass regulating valve is arranged on the bypass pipeline; and the expander is connected with a power unit. Liquid level automatically regulated's ORC power generation facility, at normal starting, operation, shut down the in-process, when heat source parameter fluctuation scope is less, the main road governing valve and the bypass governing valve of working medium pump export are all given in time to the skew signal of liquid level, through main road governing valve and bypass governing valve automatic action, make the liquid level value return the setting value, guarantee ORC power generation facility inner loop is stable.
Description
Technical Field
The utility model belongs to the technical field of organic rankine cycle power generation, concretely relates to liquid level automatically regulated's ORC power generation facility.
Background
The Organic Rankine Cycle (ORC) power generation technology is more and more widely applied to industrial waste heat utilization industries such as solar energy and geothermal energy, and the single machine capacity is different from dozens of kilowatts to several megawatts. At present, in the field of industrial waste heat utilization, a power generation technology is a reasonable utilization scheme, and due to the characteristics of high condensation pressure, large display/latent heat ratio, adoption of dry working media and the like, compared with the traditional steam Rankine cycle, the power generation technology has the characteristics of simple system and high heat utilization rate in the field of low-temperature power generation.
The industrial waste heat is inevitably influenced by the operating condition of upstream equipment due to the working characteristics of the industrial waste heat, so the industrial waste heat is in a continuous fluctuation state, the operation control of an Organic Rankine Cycle (ORC) generator set is required to be simple as much as possible, the waste heat parameter change can be automatically adapted, manual active intervention control is not required, the automatic control method of the Organic Rankine Cycle (ORC) generator set commonly used at present is carried out by a liquid level regulation and rotating speed regulation mode (see CN201710611225.4), but the automatic regulation mode needs to constantly regulate the rotating speed of a working medium pump, and the service life of the working medium pump is greatly shortened.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a liquid level automatically regulated's ORC power generation facility to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
an ORC power generation device with automatic liquid level adjustment comprises an evaporator, an expander, a condenser and a working medium pump which are sequentially connected through a main pipeline;
the evaporator is connected with an external heat source, and an evaporator liquid level meter is mounted on the evaporator;
a main path regulating valve is arranged between the evaporator and the working medium pump;
a bypass pipeline is arranged between the output end of the expansion machine and the output end of the working medium pump, and a bypass regulating valve is arranged on the bypass pipeline;
and the expander is connected with a power unit.
In this embodiment, a turbine expander is preferably used as the expander.
Preferably, the working medium pump is a power frequency working medium pump.
Preferably, the working medium pump is a variable frequency working medium pump.
Preferably, the expander is coupled to the power unit by a coupling.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model provides a liquid level automatically regulated's ORC power generation facility, in ORC power generation facility normal start, operation, shut down the process, when heat source parameter fluctuation range is less (for example: when heat source parameter fluctuation range ≦ 20% within the small fluctuation), liquid level skew signal can feed back to main road governing valve and bypass governing valve at the working medium pump export in time, through main road governing valve and bypass governing valve automatic motion, make the liquid level value return the setting value, guarantee ORC power generation facility internal circulation stable; when the fluctuation of the heat source parameters is large (for example, when the fluctuation range of the heat source parameters is more than or equal to +/-20%), the heat source inlet regulating valve on the pipeline connecting the evaporator and the external heat source participates in the automatic regulation.
(2) The utility model provides an ORC power generation facility through set up the bypass pipeline on the main line, through the main road governing valve on the main line and the bypass governing valve on the bypass pipeline are adjusted in coordination, do not need the frequency conversion regulation (be rotational speed regulation) through the working medium pump just can realize that ORC power generation facility inner loop is stable, great extension the life of working medium pump.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic structural diagram of an ORC power generation device with automatic liquid level regulation according to an embodiment of the present invention; reference numerals:
1. the system comprises a heat source inlet adjusting valve, 2, an evaporator, 3, an evaporator liquid level meter, 4, an expander, 5, a generator, 6, a bypass adjusting valve, 7, a condenser, 8, a working medium pump, 9 and a main path adjusting valve.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, rather than all embodiments, and all other embodiments obtained by a person of ordinary skill in the art without creative work belong to the protection scope of the present invention based on the embodiments of the present invention.
Referring to fig. 1, an embodiment of the present invention provides an ORC power generation apparatus with automatic liquid level adjustment, specifically including an evaporator 2, an expander 4, a condenser 7 and a working medium pump 8, which are connected in sequence through a main pipeline; the evaporator 2 is connected with an external heat source, a heat source inlet adjusting valve 1 is arranged on a pipeline connecting the evaporator 2 with the external heat source (not marked in the figure), and the evaporator 2 is provided with an evaporator liquid level meter 3. The parameters of the heat source in the evaporator 2 correspond to the parameters of the working medium one by one, when the parameters of the heat source change, the heat exchange balance in the evaporator 2 is broken, the two parameters cannot correspond to each other one by one, the change of the liquid level in the evaporator 2 is directly reflected, and at the moment, the evaporator liquid level meter 3 can change continuously. A main path regulating valve 9 is arranged between the evaporator 2 and the working medium pump 6; a bypass line (not shown) is provided between the output of the expansion machine 4 and the output of the working medium pump 8, and a bypass control valve 6 is provided on the bypass line. When the heat source parameters fluctuate, the liquid level deviation signals can be timely fed back to the main path regulating valve 9 and the bypass regulating valve 6 at the outlet of the working medium pump 8, and the liquid level value on the evaporator liquid level meter 3 returns to the set value through the automatic action of the main path regulating valve 9 and the bypass regulating valve 6, so that the internal circulation stability of the ORC power generation device is guaranteed.
In a further optimized embodiment, the expander 4 is a turbine expander, and the expander 4 is connected with the power unit 5 through a coupler. The power unit 5 is preferably a generator. The working medium pump 8 can be a power frequency working medium pump or a variable frequency working medium pump, and in the embodiment, is preferably a power frequency working medium pump.
The embodiment of the utility model provides a still provide a liquid level automatically regulated's ORC power generation facility adjusting method, including following step:
1) normal startup process of the ORC power generation device:
firstly, fully opening a bypass regulating valve 6 at an outlet of a working medium pump 8 to start the working medium pump 8, then gradually opening a heat source inlet regulating valve 1 of an evaporator 2, and enabling a heat source to enter the evaporator 2; at the moment, the liquid level value of the evaporator liquid level meter 3 is lower than a set value, and in order to keep the liquid level value of the evaporator liquid level meter 3 always at the set value, the system automatically increases the opening degree of a main path regulating valve 9 on an outlet pipeline of a working medium pump 8; when the main path regulating valve 9 is fully opened, at the moment, the liquid level value of the evaporator liquid level meter 3 is higher than a set value, the system automatically reduces the opening degree of the bypass regulating valve 6, and the liquid level value of the evaporator liquid level meter 3 is always kept at the set value. In this embodiment, the evaporator liquid level set value is determined according to the outer diameter of the shell-and-tube evaporator cylinder, the arrangement of the tube bundles in the tubes, the phase state change in the heat transfer process of the shell-side medium of the heat exchanger, and the like, and the evaporator liquid level set value is taken at the critical point of the shell-side medium of the evaporator changing from a saturated liquid phase to a saturated gas phase, so that a sufficiently high liquid level value is ensured, and the sufficient heat transfer space of the shell-side medium in the heat exchanger in the overheating process is not influenced. The opening adjustable ranges are different due to different flow characteristic selections of the main path adjusting valve 9 and the bypass adjusting valve 6. In this embodiment, the main regulating valve 9 and the bypass regulating valve 6 preferably have equal percentage flow characteristics, and the adjustable range of the general opening degree is 20% to 80%.
2) Normal operation process of the ORC power generation device:
when the heat source parameters of the evaporator 2 fluctuate, in order to keep the liquid level value of the evaporator liquid level meter 3 to maintain a set value, the opening degree of the main regulating valve 9 at the outlet of the working medium pump is unchanged, and the bypass regulating valve 6 is controlled by a liquid level value signal to automatically increase or decrease the opening degree. Specifically, in the embodiment, when the liquid level value of the evaporator liquid level meter 3 is lower than the set value, the opening degree of the main path regulating valve 9 is kept unchanged, and the opening degree of the bypass regulating valve 6 is reduced; and when the liquid level value of the evaporator liquid level meter 3 is higher than the set value, keeping the opening degree of the main path regulating valve 9 unchanged, and increasing the opening degree of the bypass regulating valve 6. The automatic adjustment of the system ensures that the level value of the evaporator liquid level meter 3 is always maintained at a set value.
3) Normal shutdown process of the ORC power generation device:
a heat source inlet regulating valve 1 on an inlet pipeline of the evaporator 2 is gradually closed, at the moment, the liquid level value of the evaporator liquid level meter 3 is lower than a set value, and the opening degree of a working medium pump outlet bypass regulating valve 6 is automatically increased in order to maintain the set value at the liquid level value of the evaporator liquid level meter 3; and when the bypass regulating valve 6 is fully opened, automatically reducing the opening degree of the main path regulating valve 9 until the regulating valve 9 is closed, and stopping the pump and the machine of the ORC power generation device.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing embodiments, or equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (5)
1. The utility model provides a liquid level automatically regulated's ORC power generation facility which characterized in that: comprises an evaporator (2), an expander (4), a condenser (7) and a working medium pump (8) which are connected in sequence through a main pipeline;
the evaporator (2) is connected with an external heat source, and an evaporator liquid level meter (3) is installed on the evaporator (2);
a main path regulating valve (9) is arranged between the evaporator (2) and the working medium pump (8);
a bypass pipeline is arranged between the output end of the expansion machine (4) and the output end of the working medium pump (8), and a bypass regulating valve (6) is arranged on the bypass pipeline;
the expander (4) is connected with a power unit (5).
2. The automatic liquid level regulated ORC power plant of claim 1, wherein: the expander (4) is a turbine expander.
3. The automatic liquid level regulated ORC power plant of claim 1, wherein: the working medium pump (8) is a power frequency working medium pump.
4. The automatic liquid level regulated ORC power plant of claim 1, wherein: the working medium pump (8) is a variable-frequency working medium pump.
5. The automatic liquid level regulated ORC power plant of claim 1, wherein: the expander (4) is connected with the power unit (5) through a coupler.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021175343.9U CN212296520U (en) | 2020-06-22 | 2020-06-22 | ORC power generation device with automatic liquid level adjustment function |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202021175343.9U CN212296520U (en) | 2020-06-22 | 2020-06-22 | ORC power generation device with automatic liquid level adjustment function |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111636937A (en) * | 2020-06-22 | 2020-09-08 | 中国长江动力集团有限公司 | ORC power generation device with automatic liquid level adjustment function and adjusting method thereof |
| CN111636937B (en) * | 2020-06-22 | 2024-07-16 | 中国长江动力集团有限公司 | ORC power generation device capable of automatically adjusting liquid level and adjusting method thereof |
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2020
- 2020-06-22 CN CN202021175343.9U patent/CN212296520U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111636937A (en) * | 2020-06-22 | 2020-09-08 | 中国长江动力集团有限公司 | ORC power generation device with automatic liquid level adjustment function and adjusting method thereof |
| CN111636937B (en) * | 2020-06-22 | 2024-07-16 | 中国长江动力集团有限公司 | ORC power generation device capable of automatically adjusting liquid level and adjusting method thereof |
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