CN208431039U - Energy-saving heating unit - Google Patents
Energy-saving heating unit Download PDFInfo
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- CN208431039U CN208431039U CN201820898432.2U CN201820898432U CN208431039U CN 208431039 U CN208431039 U CN 208431039U CN 201820898432 U CN201820898432 U CN 201820898432U CN 208431039 U CN208431039 U CN 208431039U
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Abstract
The utility model discloses a kind of energy-saving heating units, including main steam turbine and the heat exchangers for district heating being connected to by extraction line with main steam turbine intermediate pressure cylinder, heat supply butterfly valve is provided on extraction line, the second outlet end of heat supply butterfly valve is connected to main steam turbine low pressure (LP) cylinder by lateral, there are two triple valves for setting on lateral, it is connected between two triple valves by bypass duct, active hot small turbine is arranged in bypass duct；The side of the hot small turbine of function is provided with monitoring device, the DCS controller of the output end connection thermal power plant unit of monitoring device, and the input terminal of DCS controller is also connect with the signal end of heat supply butterfly valve, and the output end of DCS controller is connected to the controlled end of heat supply butterfly valve.The utility model can simplify set structure, and can pass through in time heat supply butterfly valve in the hot small turbine failure of function and make a response on the basis of improving steam extraction heat utilization rate, and the safety and steady operation for main steam turbine during heat supply provides safeguard.
Description
Technical field
The utility model relates to steam power plant's heating equipment control technology field, especially a kind of thermal power plant unit.
Background technique
The heat supply extraction regulation mode of thermal power plant unit is divided into external adjusting and internal regulation two ways in steam power plant, wherein
External regulating measure is usually to draw steam from each extraction opening of steam turbine or pipeline, installs reducing-and-cooling plant etc. additional by outside
Adjustment equipment meets steam extraction demand, and such mode adjustable range is limited, and adaptability is poor；Internal regulation is by steam turbine
The adjusting unit in portion makes the steam of extraction meet steam extraction requirement, and such mode is high-efficient, and adjusting range is wide, and application is relatively broad.
When thermal power plant unit uses internal regulation mode, the tune that unit generally selects pressure-regulating valve to carry out steam pressure is adjusted
Control.Since the steam heat and pressure of main steam turbine output are higher, it is directly used in the recirculated water of heating heating network not only
It will appear the waste of steam, and the service life of meeting heating network can also have an impact, therefore would generally be defeated in main steam turbine
Pressure-regulating valve is set on the extraction line of outlet, to reduce the pressure of steam, is then delivered to heating network again.Although such
Throttle style can satisfy the low-pressure demand of heating network, but also reduce the utilization rate of steam simultaneously.
Chinese patent 2016206163581 discloses a kind of energy-efficient steam-extracting type thermal power plant unit, solves intermediate pressure cylinder
When exhaust steam pressure is reduced to heat supply network for thermal pressure the problem of generated restriction loss, mainly by being set in intermediate pressure cylinder extraction opening
The second heat supply bleed steam pipework arranged side by side with the first heat supply bleed steam pipework is set, and back pressure type vapour is set on the second heat supply bleed steam pipework
The utilization of turbine progress heat.The program is required in every pipeline although the utilization efficiency of steam extraction thermal energy can be improved
Extraction control valve is set, and the steam extraction additionally, due to the output of main steam turbine intermediate pressure cylinder also needs some to be back to main steam turbine
Low pressure (LP) cylinder, therefore just need that three extraction control valve units are at least arranged and could run, and need to close at any time in operational process
The operating status of each equipment is infused, needs to control the aperture of each extraction control valve correspondingly to guarantee the even running of unit, controls
Logic is complex.
Utility model content
The utility model technical issues that need to address are to provide a kind of energy-saving heating unit, are improving steam extraction heat energy utilization
On the basis of rate, simplify set structure, the safety and steady operation for main steam turbine during heat supply provides safeguard.
In order to solve the above technical problems, technical solution adopted in the utility model is as follows.
A kind of energy-saving heating unit, including main steam turbine and connected by extraction line and main steam turbine intermediate pressure cylinder steam extraction end
Logical heat exchangers for district heating is provided with heat supply butterfly valve on the extraction line, and the second outlet end of heat supply butterfly valve passes through lateral
It is connected to main steam turbine low pressure (LP) cylinder, setting passes through bypass duct between two triple valves there are two triple valve on the lateral
Connection, bypass duct are provided with the hot small turbine of function for part steam extraction to be converted to electric energy；The hot small turbine of function
Side is provided with the monitoring device of the monitoring hot small turbine working condition of function, the output end connection thermal power plant unit of monitoring device
DCS controller, the input terminal of DCS controller are also connect with the signal end of heat supply butterfly valve, the output end connection of the DCS controller
To the controlled end of heat supply butterfly valve.
Above-mentioned energy-saving heating unit, the monitoring device are output current monitoring device.
Two bypass ducts arranged side by side, every bypass duct is arranged on the lateral in above-mentioned energy-saving heating unit altogether
On be respectively provided with the hot small turbine of function.
Due to using above technical scheme, technological progress acquired by the utility model is as follows.
The utility model by the extraction line of main steam turbine output end be arranged heat supply butterfly valve, and heat supply butterfly valve with
The hot small turbine of function is set side by side on extraction line between heat exchangers for district heating, the steam in extraction line is shunted, benefit
The hot small turbine rotation of function is driven with heating steam extraction, small generator is further dragged and generates electricity；For 300MW heat supply machine
Group, heating steam extraction amount can drag two hot small turbines of function, and extraction pressure is in 0.2-0.5MPa, and extraction temperature is at 220-280 DEG C.
In unit running process, when the hot small turbine fault trip of function, heat supply butterfly valve can be grasped accordingly by DCS controller
Make, to reduce influence of the hot small turbine accident conditions of function to main steam turbine, the safety of main steam turbine is flat during ensure that heat supply
Steady operation, improves the stability of power grid and heat supply network.
Detailed description of the invention
Fig. 1 is the system diagram of unit described in the utility model.
Wherein: 1. main steam turbine intermediate pressure cylinders, 2. main steam turbine low pressure (LP) cylinders, 3. heat exchangers for district heatings, 4.DCS controller, 5. supply
Hot butterfly valve, the 6. first hot small turbines of function, 7. first monitoring devices, the 8. second hot small turbines of function, 9. second monitoring devices,
10. extraction line.
Specific embodiment
Below in conjunction with specific embodiment, the present invention will be further described in detail.
A kind of energy-saving heating unit, system structure is as shown in Figure 1, include main steam turbine, heat exchangers for district heating, DCS control
Device, heat supply butterfly valve, extraction line, lateral, bypass duct, the hot small turbine of function and monitoring device, in the utility model
The hot small turbine of function and monitoring device are arranged two sets altogether, are separately positioned in two bypass ducts.
1 steam extraction end of main steam turbine intermediate pressure cylinder is connected to by extraction line 10 with heat exchangers for district heating 3, and the setting of heat supply butterfly valve 5 exists
On the extraction line 10 at 1 steam extraction end of main steam turbine intermediate pressure cylinder, the first exit end of heat supply butterfly valve is connected to through extraction line
The second outlet end of heat exchangers for district heating 3, heat supply butterfly valve is connected to main steam turbine low pressure (LP) cylinder 2 by lateral；On lateral
Setting is there are two triple valve, and by bypass duct connection between two triple valves, two bypass ducts are set side by side, every shunt valve
The hot small turbine of function is respectively provided on road, the hot small turbine of function is used to be further separated into the steam of main steam turbine low pressure (LP) cylinder, this portion
Divide steam extraction that can drive the hot small turbine rotation of function, further drags small generator and generate electricity, realization will be in bypass duct
Part steam extraction is converted to the purpose of electric energy, improves the utilization rate of steam extraction thermal energy.
For the operating status of the hot small turbine of real-time monitoring function, unit is also provided with detection monitoring device, monitoring device
The DCS controller 4 of output end connection thermal power plant unit.In the utility model, monitoring device is output current monitoring device, i.e. DCS
Controller judges the operating status of the hot small turbine of function by monitoring the output electric current of the hot small turbine of function.
Meanwhile the input terminal of DCS controller 4 is also connect with the signal end of heat supply butterfly valve, is used for real-time acquiring heat supply butterfly valve
Practical aperture；The output end of DCS controller is connected to the controlled end of heat supply butterfly valve, i.e., DCS controller is according to the small steamer of function heat
The operating status of machine and the practical aperture of current heat supply butterfly valve calculate the aperture that heat supply butterfly valve should export, aperture requirement
Can either meet the needs of heat exchangers for district heating, while also to meet the even running requirement of main steam turbine low pressure (LP) cylinder.
When the hot small turbine of function works normally, the steam extraction of autonomous Steam Turbine Through IP Admission steam extraction end output is partially returned low
After cylinder pressure and the hot small turbine heat energy utilization of two function, remaining part can still meet the heating requirements of heat exchangers for district heating, greatly
The utilization rate of steam extraction thermal energy is improved greatly.
When the hot small turbine tripping of function, the hot small turbine of function can be in direct bypass condition, under this state, originally pass through
The steam of the hot small turbine of function just can not all pass through the low pressure of main steam turbine again by the hot small turbine acting condensation of function
, thus unavoidably there is the case where main steam turbine low pressure (LP) cylinder throttle flow is uprushed in cylinder discharge, and influences unit normal operation.To keep away
Exempt from it is such happen, DCS controller just will the aperture to heat supply butterfly valve adjusted in real time, the adjusting of heat supply butterfly valve is according to being
For the operating status of the hot small turbine of function and the practical aperture of current heat supply butterfly valve, DCS controller is by judging the small vapour of function heat
Heat supply butterfly valve opening and fault condition type before turbine tripping, to obtain the actuating quantity that should be adjusted of heat supply butterfly valve, thus
Different heat supply butterfly valve open commands is exported, after this instruction output, heat supply butterfly valve executes corresponding aperture, which still is able to full
The steam extraction thermal demand of sufficient main steam turbine low pressure (LP) cylinder and heat exchangers for district heating, so that the even running for unit provides reliable guarantor
Barrier.
Claims (3)
1. a kind of energy-saving heating unit, including main steam turbine and pass through extraction line (10) and main steam turbine intermediate pressure cylinder steam extraction end
The heat exchangers for district heating (3) of connection, it is characterised in that: be provided on the extraction line heat supply butterfly valve (5), the second of heat supply butterfly valve
Outlet end is connected to main steam turbine low pressure (LP) cylinder (2) by lateral, triple valve there are two settings on the lateral, and two or three
It is connected between port valve by bypass duct, bypass duct is provided with the small steamer of the heat of the function for part steam extraction to be converted to electric energy
Machine；The side of the hot small turbine of function is provided with the monitoring device of the monitoring hot small turbine working condition of function, monitoring device
Output end connects the DCS controller (4) of thermal power plant unit, and the input terminal of DCS controller (4) also connects with the signal end of heat supply butterfly valve
It connects, the output end of the DCS controller is connected to the controlled end of heat supply butterfly valve.
2. energy-saving heating unit according to claim 1, it is characterised in that: the monitoring device is output current monitoring dress
It sets.
3. energy-saving heating unit according to claim 1, it is characterised in that: be arranged two on the lateral altogether side by side
Bypass duct, be respectively provided with the hot small turbine of function on every bypass duct.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820898432.2U CN208431039U (en) | 2018-06-11 | 2018-06-11 | Energy-saving heating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820898432.2U CN208431039U (en) | 2018-06-11 | 2018-06-11 | Energy-saving heating unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208431039U true CN208431039U (en) | 2019-01-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820898432.2U Active CN208431039U (en) | 2018-06-11 | 2018-06-11 | Energy-saving heating unit |
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| CN (1) | CN208431039U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431644A (en) * | 2021-08-03 | 2021-09-24 | 盾石磁能科技有限责任公司 | Power generation device and power generation system |
-
2018
- 2018-06-11 CN CN201820898432.2U patent/CN208431039U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113431644A (en) * | 2021-08-03 | 2021-09-24 | 盾石磁能科技有限责任公司 | Power generation device and power generation system |
| CN113431644B (en) * | 2021-08-03 | 2023-02-10 | 盾石磁能科技有限责任公司 | Power generation device and power generation system |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 050000 2nd floor, Yingpan commercial and residential building, 129 Nanxiao street, Qiaoxi District, Shijiazhuang City, Hebei Province Patentee after: Hebei Jiantou energy science and Technology Research Institute Co.,Ltd. Address before: 050000 2nd floor, Yingpan commercial and residential building, 129 Nanxiao street, Qiaoxi District, Shijiazhuang City, Hebei Province Patentee before: HEBEI JI-YAN ENERGY SCIENCE AND TECHNOLOGY RESEARCH INSTITUTE Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |