CN209855864U - Optical axis heat supply unit starts ventilation exhaust system - Google Patents
Optical axis heat supply unit starts ventilation exhaust system Download PDFInfo
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- CN209855864U CN209855864U CN201920380919.6U CN201920380919U CN209855864U CN 209855864 U CN209855864 U CN 209855864U CN 201920380919 U CN201920380919 U CN 201920380919U CN 209855864 U CN209855864 U CN 209855864U
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Abstract
The utility model provides an optical axis heat supply unit starts ventilation steam exhaust system, which is characterized in that, including the intermediate pressure jar, the low pressure jar, the first valve group, the second valve group, the condenser and the heat supply head station, the intermediate pressure rotor in the intermediate pressure jar is fixedly connected with the low pressure rotor in the low pressure jar, the intermediate pressure jar is connected with one end of the first valve group through the air exhaust pipeline, the other end of the first valve group is connected with the air inlet of the condenser through the air exhaust pipeline, the intermediate pressure jar is also connected with one end of the second valve group through the air exhaust pipeline, the other end of the second valve group is connected with the air inlet of the heat supply head station through the air exhaust pipeline; the cooperation through each valve group is used for when the unit starts, the intermediate pressure cylinder steam extraction intelligence gets into the condenser through the bleed duct, thereby makes intermediate pressure steam extraction volume flow and flow phase-match, reduces the blast air heat, has avoided the unit because the blowing air generates heat and the shut down that arouses, very big assurance security when optical axis heat supply unit starts.
Description
Technical Field
The utility model relates to an optical axis heat supply unit starts ventilation steam discharging system.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
In order to meet the requirements of national energy-saving and emission-reducing policies and increase the index competitiveness of a power plant, a pure condensing unit with the grade of 300MW or below is modified by a back pressure type heat supply unit. After the heating system of the backpressure machine of the straight condensing unit is transformed, the exhaust waste heat of the unit is completely recovered, the loss of a power generation cold source is zero, and the heat supply and the power generation income in a plant are obviously improved. In order to realize that the unit operates according to the heat supply mode of the back pressure machine in the heat supply period, the low-pressure cylinder rotor is replaced by an optical axis to operate in the heat supply period, and the exhaust steam of the intermediate pressure cylinder is transmitted to the heating heat supply primary station through the steam extraction pipeline to heat the circulating water of the heating heat supply network, so that the heat supply steam extraction quantity of the unit is improved, and the heat supply capacity of the unit is expanded. The back pressure machine is operated in the heat supply period of the unit, an original low-medium pressure cylinder communicating pipe is replaced by a steam extraction pipeline from a medium pressure cylinder to a head station, the steam inlet amount of the low-pressure cylinder is basically zero when the unit operates, the unit steam exhaust is directly cooled by a head station heat supply network heater when the unit starts to rush, and the back pressure is higher when the unit starts because the heat supply network heater does not have a corresponding vacuumizing system.
Therefore, the present inventors consider that the problems to be solved at present are as follows: the steam flow in the unit rush-rotation project is very small, so that when the unit is started, due to high unit backpressure and low steam flow, air blowing is formed by steam exhaust of the intermediate pressure cylinder, the steam exhaust temperature of the intermediate pressure cylinder continuously rises in the rush-rotation process, and the unit vibrates and gradually rises until the unit is braked and stopped.
Disclosure of Invention
In order to solve prior art's not enough, this disclosure provides an optical axis heat supply unit starts exhaust system that ventilates, use through the cooperation of each valve group for intermediate pressure jar exhaust intelligence gets into the condenser through the bleed duct when the unit starts, thereby makes intermediate pressure exhaust volume flow and flow phase-match, reduces the blast air heat, has avoided the unit because the blast air generates heat and the shut down that arouses, very big assurance the security when optical axis heat supply unit starts.
In order to achieve the purpose, the following technical scheme is adopted in the disclosure:
the utility model provides an optical axis heat supply unit starts ventilation air exhaust system, includes intermediate pressure cylinder, low pressure cylinder, first valve group, second valve group, condenser and heat supply head, intermediate pressure cylinder rotor and low pressure cylinder rotor fixed connection, the intermediate pressure cylinder passes through the bleed-off line and is connected with the one end of first valve group, the other end of first valve group passes through the bleed-off line with the air inlet of condenser and is connected, the intermediate pressure cylinder still is connected with the one end of second valve group through the bleed-off line, the other end of second valve group passes through the bleed-off line with the air inlet of heat supply head and is connected.
As some possible implementation manners, the hydraulic cylinder further comprises a third valve group, one end of the third valve group is connected with the intermediate pressure cylinder through an air exhaust pipeline, and the other end of the third valve group is respectively connected with the other ends of the first valve group and the second valve group through air exhaust pipelines.
As some possible implementations, the low pressure cylinder rotor is an optical axis rotor, and the optical axis rotor is fixedly connected with the intermediate pressure cylinder rotor through a semi-flexible coupling.
As some possible implementations, the semi-flexible coupling is fixedly connected by hydraulic bolts.
As some possible realization modes, the low-pressure cylinder is connected with the condenser through an air exhaust pipeline.
As some possible implementation manners, a fourth valve set is arranged on the air exhaust pipeline between the low-pressure cylinder and the condenser.
As some possible implementation manners, the first valve group, the second valve group and the third valve group respectively comprise a safety valve, an extraction check valve, a quick-closing regulating valve and an electric butterfly valve which are arranged in sequence.
As some possible realization modes, the optical axis rotor is formed by reforming a low-pressure rotor with blades after the blades are removed.
As some possible realization modes, the steam inlet of the low-pressure cylinder is blocked by a blocking plate.
Compared with the prior art, the beneficial effect of this disclosure is:
1. the cooperation of content through each valve group is used for when the unit starts, the intermediate pressure jar exhaust intelligence gets into the condenser through the bleed pipeline, thereby makes intermediate pressure exhaust volume flow and flow phase-match, reduces the blast air heat, has avoided the unit because the blast air generates heat and the shut down that arouses, very big assurance security when optical axis heat supply unit starts.
2. According to the low-voltage rotor, the old low-voltage rotor with the blades is changed into the low-voltage rotor after the blades are removed, so that the waste resource utilization rate is effectively improved, the waste is reduced, the conversion period of conversion between power generation and heat supply of a unit is greatly shortened, and the working efficiency is improved.
3. According to the hydraulic connection structure, the semi-flexible coupling is adopted to realize connection of the optical axis rotor and the intermediate pressure cylinder rotor, and the hydraulic valve is combined, so that the connection firmness and stability are greatly improved.
4. This low pressure jar pass through the bleed line with the condenser and be connected to guarantee that there is not the steam extraction to remain in the low pressure jar when the heat supply, improved the life of low pressure jar, also improved entire system's stability.
5. The first valve group, the second valve group and the third valve group respectively comprise a plurality of valves such as a safety valve, a steam extraction check valve, a quick-closing regulating valve and an electric butterfly valve which are sequentially arranged, so that effective control over an air extraction pipeline is realized, the safety of steam extraction is guaranteed, and emergency closing under emergency can be realized through each valve.
6. The steam inlet of low pressure jar, this disclosure adopt the closure plate to carry out the shutoff to when the heat supply mode, avoid the steam extraction to get into the low pressure jar.
Drawings
Fig. 1 is a schematic view of a system for starting, ventilating and exhausting an optical axis heat supply unit according to embodiment 1 of the present disclosure.
Fig. 2 is a schematic view of a system for starting ventilation and steam exhaust of an optical axis heat supply unit according to embodiment 2 of the present disclosure.
Fig. 3 is a schematic view of a system for starting ventilation and steam exhaust of an optical axis heat supply unit according to embodiment 3 of the present disclosure.
Fig. 4 is a schematic view of an optical axis heating unit valve according to embodiments 1, 2, and 3 of the present disclosure.
1-a medium pressure cylinder; 2-low pressure cylinder; 3-a third valve group; 4-a second valve group; 5-a first valve group; 6-a steam extraction pipeline; 7-heat supply first station; 8-a condenser; 9-fourth valve group; 10-safety valve; 11-a vapor extraction check valve; 12-quick-closing regulating valve; 13-electric butterfly valve.
Detailed Description
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present disclosure. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example 1:
as shown in fig. 1 and 4, the present embodiment provides a starting ventilation and air extraction system for an optical axis heat supply unit, which includes an intermediate pressure cylinder 1, a low pressure cylinder 2, a first valve group 5, a second valve group 4, a condenser 8, and a heat supply head 7, wherein an intermediate pressure rotor in the intermediate pressure cylinder 1 is fixedly connected to a low pressure cylinder rotor in the low pressure cylinder 2, the low pressure cylinder rotor is an optical axis rotor, the optical axis rotor is fixedly connected to the intermediate pressure cylinder rotor through a semi-flexible coupling, and the fixed connection is performed through a hydraulic bolt;
the intermediate pressure cylinder is connected with one end of a first valve group 5 through an air extraction pipeline, the other end of the first valve group 5 is connected with an air inlet of a condenser through an air extraction pipeline 6, the intermediate pressure cylinder 1 is further connected with one end of a second valve group 4 through the air extraction pipeline 6, the other end of the second valve group 4 is connected with an air inlet of a heat supply initial station 7 through the air extraction pipeline 6, and the low pressure cylinder is connected with the condenser through the air extraction pipeline;
the first valve group 5 and the second valve group 4 respectively comprise a safety valve 10, an extraction check valve 11, a quick-closing regulating valve 12 and an electric butterfly valve 13 which are sequentially arranged, and the electric butterfly valve 13 is provided with a manual control device, so that manual control during power failure can be realized;
the low-pressure optical axis rotor is a customized low-pressure rotor matched with the low-pressure cylinder, and a steam inlet of the low-pressure cylinder is blocked by adopting a blocking plate.
The working method of the ventilation and steam exhaust system in the embodiment comprises the following steps:
when the unit is started to impact, all valves of the first valve group 5 are opened, all valves of the second valve group 4 are closed, the condenser keeps high vacuum, the exhaust steam of the intermediate pressure cylinder 1 enters the condenser 8 through a newly designed starting ventilation exhaust system, the volume flow and the flow of the intermediate pressure exhaust steam are matched when the unit is started, the blast heat is reduced, the unit is prevented from being stopped due to blast heating, when the unit is under a mesh belt load and meets the requirement of the load, all valves of the first valve group 5 are closed, all valves of the second valve group 4 are opened, and the heat supply of a unit back press is realized.
Example 2:
as shown in fig. 2 and 4, as shown in fig. 1, the present embodiment provides a starting ventilation and air extraction system for an optical axis heat supply unit, which includes an intermediate pressure cylinder 1, a low pressure cylinder 2, a first valve group 5, a second valve group 4, a condenser 8, and a heat supply head 7, wherein an intermediate pressure rotor in the intermediate pressure cylinder 1 is fixedly connected to a low pressure cylinder rotor in the low pressure cylinder 2, the low pressure cylinder rotor is an optical axis rotor, the optical axis rotor is fixedly connected to the intermediate pressure cylinder rotor through a semi-flexible coupling, and the fixed connection is performed through a hydraulic bolt;
the intermediate pressure cylinder is connected with one end of a first valve group 5 through an air extraction pipeline, the other end of the first valve group 5 is connected with an air inlet of a condenser through an air extraction pipeline 6, the intermediate pressure cylinder 1 is further connected with one end of a second valve group 4 through the air extraction pipeline 6, the other end of the second valve group 4 is connected with an air inlet of a heat supply initial station 7 through the air extraction pipeline 6, and the low pressure cylinder is connected with the condenser through the air extraction pipeline;
the hydraulic control system is characterized by further comprising a third valve group 3, one end of the third valve group 3 is connected with the intermediate pressure cylinder 1 through an air exhaust pipeline 6, and the other end of the third valve group 3 is connected with the other ends of the first valve group 5 and the second valve group 4 through air exhaust pipelines respectively.
The first valve group 5 and the second valve group 4 respectively comprise a safety valve 10, an extraction check valve 11, a quick-closing regulating valve 12 and an electric butterfly valve 13 which are sequentially arranged, and the electric butterfly valve 13 is provided with a manual control device, so that manual control during power failure can be realized;
the low-pressure optical axis rotor is a customized low-pressure rotor matched with the low-pressure cylinder, and a steam inlet of the low-pressure cylinder is blocked by adopting a blocking plate.
The working method of the ventilation and steam exhaust system in the embodiment comprises the following steps:
when the unit is started to impact, all valves of the first valve group 5 and the third valve group 3 are opened, all valves of the second valve group 4 are closed, meanwhile, the condenser keeps high vacuum, the exhaust steam of the intermediate pressure cylinder 1 enters the condenser 8 through a newly designed starting ventilation exhaust steam system, the volume flow of the intermediate pressure exhaust steam is matched with the flow when the unit is started, the blast heat is reduced, the unit is prevented from being stopped due to blast heating, when the unit is subjected to net belt load and meets the requirement of the load, all valves of the first valve group 5 are closed, all valves of the second valve group 4 and the third valve group 3 are opened, and the heat supply of the unit back press is realized.
Example 3:
as shown in fig. 3 and 4, as shown in fig. 1, the present embodiment provides a starting ventilation and air extraction system for an optical axis heat supply unit, which includes an intermediate pressure cylinder 1, a low pressure cylinder 2, a first valve group 5, a second valve group 4, a condenser 8, and a heat supply head 7, wherein an intermediate pressure rotor in the intermediate pressure cylinder 1 is fixedly connected to a low pressure cylinder rotor in the low pressure cylinder 2, the low pressure cylinder rotor is an optical axis rotor, the optical axis rotor is fixedly connected to the intermediate pressure cylinder rotor through a semi-flexible coupling, and the fixed connection is performed through a hydraulic bolt;
the intermediate pressure cylinder is connected with one end of a first valve group 5 through an air extraction pipeline, the other end of the first valve group 5 is connected with an air inlet of a condenser through an air extraction pipeline 6, the intermediate pressure cylinder 1 is further connected with one end of a second valve group 4 through the air extraction pipeline 6, the other end of the second valve group 4 is connected with an air inlet of a heat supply initial station 7 through the air extraction pipeline 6, and the low pressure cylinder is connected with the condenser through the air extraction pipeline;
the hydraulic control system is characterized by further comprising a third valve group 3, one end of the third valve group 3 is connected with the intermediate pressure cylinder 1 through an air exhaust pipeline 6, and the other end of the third valve group 3 is connected with the other ends of the first valve group 5 and the second valve group 4 through air exhaust pipelines respectively.
And a fourth valve group 9 is arranged on an air exhaust pipeline between the low-pressure cylinder and the condenser.
The first valve group 5 and the second valve group 4 respectively comprise a safety valve 10, an extraction check valve 11, a quick-closing regulating valve 12 and an electric butterfly valve 13 which are sequentially arranged, and the electric butterfly valve 13 is provided with a manual control device, so that manual control during power failure can be realized;
the low-pressure optical axis rotor is a customized low-pressure rotor matched with the low-pressure cylinder, and a steam inlet of the low-pressure cylinder is blocked by adopting a blocking plate.
The working method of the ventilation and steam exhaust system in the embodiment comprises the following steps:
when the unit is started to impact, all valves of the first valve group 5, the third valve group 3 and the fourth valve group 9 are opened, all valves of the second valve group 4 are closed, meanwhile, the condenser keeps high vacuum, the exhaust steam of the intermediate pressure cylinder 1 enters the condenser 8 through a newly designed starting ventilation exhaust steam system, the volume flow of the intermediate pressure exhaust steam is matched with the flow when the unit is started, the blast heat is reduced, the shutdown of the unit caused by blast heating is avoided, when the unit is subjected to net belt load and meets the requirement of the load, all valves of the first valve group 5 and the fourth valve group 9 are closed, all valves of the second valve group 4 and the third valve group 3 are opened, and the heat supply of the unit back press is realized.
Example 4:
as shown in fig. 2 and 4, as shown in fig. 1, the present embodiment provides a starting ventilation and air extraction system for an optical axis heat supply unit, which includes an intermediate pressure cylinder 1, a low pressure cylinder 2, a first valve group 5, a second valve group 4, a condenser 8, and a heat supply head 7, wherein an intermediate pressure rotor in the intermediate pressure cylinder 1 is fixedly connected to a low pressure cylinder rotor in the low pressure cylinder 2, the low pressure cylinder rotor is an optical axis rotor, the optical axis rotor is fixedly connected to the intermediate pressure cylinder rotor through a semi-flexible coupling, and the fixed connection is performed through a hydraulic bolt;
the intermediate pressure cylinder is connected with one end of a first valve group 5 through an air extraction pipeline, the other end of the first valve group 5 is connected with an air inlet of a condenser through an air extraction pipeline 6, the intermediate pressure cylinder 1 is further connected with one end of a second valve group 4 through the air extraction pipeline 6, the other end of the second valve group 4 is connected with an air inlet of a heat supply initial station 7 through the air extraction pipeline 6, and the low pressure cylinder is connected with the condenser through the air extraction pipeline;
the hydraulic control system is characterized by further comprising a third valve group 3, one end of the third valve group 3 is connected with the intermediate pressure cylinder 1 through an air exhaust pipeline 6, and the other end of the third valve group 3 is connected with the other ends of the first valve group 5 and the second valve group 4 through air exhaust pipelines respectively.
The first valve group 5 and the second valve group 4 respectively comprise a safety valve 10, an extraction check valve 11, a quick-closing regulating valve 12 and an electric butterfly valve 13 which are sequentially arranged, and the electric butterfly valve 13 is provided with a manual control device, so that manual control during power failure can be realized;
the low-pressure optical axis rotor is formed by reforming a low-pressure rotor with blades after the blades are removed, and the steam inlet of the low-pressure cylinder is blocked by adopting a blocking plate.
The working method of the ventilation and steam exhaust system in the embodiment comprises the following steps:
when the unit is started to impact, all valves of the first valve group 5 and the third valve group 3 are opened, all valves of the second valve group 4 are closed, meanwhile, the condenser keeps high vacuum, the exhaust steam of the intermediate pressure cylinder 1 enters the condenser 8 through a newly designed starting ventilation exhaust steam system, the volume flow of the intermediate pressure exhaust steam is matched with the flow when the unit is started, the blast heat is reduced, the unit is prevented from being stopped due to blast heating, when the unit is subjected to net belt load and meets the requirement of the load, all valves of the first valve group 5 are closed, all valves of the second valve group 4 and the third valve group 3 are opened, and the heat supply of the unit back press is realized.
The above description is only a preferred embodiment of the present disclosure and is not intended to limit the present disclosure, and various modifications and changes may be made to the present disclosure by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present disclosure should be included in the protection scope of the present disclosure.
Claims (10)
1. The utility model provides an optical axis heat supply unit starts exhaust system that ventilates, a serial communication port, including intermediate pressure jar, low pressure jar, first valve group, second valve group, condenser and heat supply head station, the low pressure rotor fixed connection in intermediate pressure rotor and the low pressure jar of intermediate pressure in the intermediate pressure jar, the intermediate pressure jar passes through bleed-off line and is connected with the one end of first valve group, the other end of first valve group passes through bleed-off line with the air inlet of condenser and is connected, the intermediate pressure jar still is connected with the one end of second valve group through bleed-off line, the other end of second valve group passes through bleed-off line with the air inlet of heat supply head station and is connected.
2. The optical axis heat supply unit startup ventilation and steam exhaust system according to claim 1, further comprising a third valve set, one end of the third valve set being connected to the intermediate pressure cylinder through a suction pipeline, and the other end of the third valve set being connected to the other ends of the first valve set and the second valve set through suction pipelines, respectively.
3. The optical axis heating unit startup ventilation and exhaust system as claimed in claim 2, wherein the first valve set, the second valve set and the third valve set respectively comprise a safety valve, an exhaust check valve, a quick-closing regulating valve and an electric butterfly valve which are arranged in sequence.
4. The optical axis heat supply unit startup ventilation steam exhaust system of claim 1, wherein the low pressure cylinder rotor is an optical axis rotor, and the optical axis rotor is fixedly connected with the intermediate pressure cylinder rotor through a semi-flexible coupling.
5. The optical axis heating unit startup ventilation steam exhaust system of claim 4, wherein the semi-flexible coupling is fixedly connected by hydraulic bolts.
6. The optical axis heat supply unit startup ventilation and exhaust system of claim 1, wherein the low pressure cylinder is connected with the condenser through an air exhaust pipeline.
7. The optical axis heat supply unit startup ventilation and exhaust system as claimed in claim 5, wherein a fourth valve set is provided on the exhaust duct between the low pressure cylinder and the condenser.
8. The optical axis heating unit startup ventilation and exhaust system as claimed in claim 6, wherein the first valve set, the second valve set and the third valve set respectively comprise a safety valve, an exhaust check valve, a quick-closing regulating valve and an electric butterfly valve which are arranged in sequence.
9. The optical axis heat supply unit startup ventilation and exhaust system of claim 4, wherein the optical axis rotor is reformed by removing blades from the low pressure rotor with blades.
10. The optical axis heat supply unit startup ventilation and steam exhaust system of claim 9, wherein the steam inlet of the low pressure cylinder is blocked by a blocking plate.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920380919.6U CN209855864U (en) | 2019-03-22 | 2019-03-22 | Optical axis heat supply unit starts ventilation exhaust system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920380919.6U CN209855864U (en) | 2019-03-22 | 2019-03-22 | Optical axis heat supply unit starts ventilation exhaust system |
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| CN209855864U true CN209855864U (en) | 2019-12-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112081635A (en) * | 2020-08-06 | 2020-12-15 | 北京龙威发电技术有限公司 | Method and system for eliminating blowing phenomenon of steam turbine intermediate pressure cylinder |
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2019
- 2019-03-22 CN CN201920380919.6U patent/CN209855864U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112081635A (en) * | 2020-08-06 | 2020-12-15 | 北京龙威发电技术有限公司 | Method and system for eliminating blowing phenomenon of steam turbine intermediate pressure cylinder |
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