CN113236377A - Steam turbine for dry quenching waste heat power generation - Google Patents
Steam turbine for dry quenching waste heat power generation Download PDFInfo
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- CN113236377A CN113236377A CN202110717520.4A CN202110717520A CN113236377A CN 113236377 A CN113236377 A CN 113236377A CN 202110717520 A CN202110717520 A CN 202110717520A CN 113236377 A CN113236377 A CN 113236377A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D15/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01D15/10—Adaptations for driving, or combinations with, electric generators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/10—Heating, e.g. warming-up before starting
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/08—Cooling; Heating; Heat-insulation
- F01D25/12—Cooling
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/18—Lubricating arrangements
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Sliding-Contact Bearings (AREA)
- Mounting Of Bearings Or Others (AREA)
Abstract
The invention discloses a steam turbine for dry quenching waste heat power generation, which relates to the technical field of steam turbines and comprises a steam turbine and a bearing arranged on a rotating shaft of the steam turbine, and further comprises a thermostat, a lubricating oil monitoring system, a thermostat, a filter, a first oil tank, a second oil tank, a first oil pump and a second oil pump. Temperature and viscosity of lubricating oil in the intelligent recognition bearing oil pocket, when effectual solved the steam turbine and just started, lubricating oil is because of the temperature low, make viscosity high, the oil film is difficult to the formation problem, the lubricating effect of lubricating oil to the bearing has been improved, and heat through steam, need not increase other heating system, manufacturing cost is reduced, the cooling water of condenser department cools down lubricating oil, abundant utilization the energy among the dry coke quenching waste heat power generation system, realize the lubricating oil that must change many to impurity and new lubricating oil switch, the life of production efficiency with improved the bearing, do not need artifical monitoring discernment constantly, the amount of labour has been saved.
Description
Technical Field
The invention relates to the technical field of steam turbines, in particular to a steam turbine for dry quenching waste heat power generation.
Background
The coke dry quenching waste heat power generation is a coke quenching method for cooling red coke in an anaerobic environment by adopting inert gas, in the coke dry quenching process, the red coke is loaded from the top of a coke dry quenching furnace, low-temperature inert gas is blown into a red coke layer of a cooling section of the coke dry quenching furnace by a circulating fan, and the cooled coke is discharged from the bottom of the coke dry quenching furnace; after absorbing the latent heat of the red coke, the inert circulating gas with the increased temperature is discharged from the annular flue of the dry quenching furnace, and then enters a dry quenching waste heat boiler for heat exchange, and the steam generated by the boiler enters a steam turbine to drive a generator to generate power.
Steam gets into the steam turbine and passes through nozzle, moving blade messenger pivot high-speed rotation, and the pivot is installed on the steam turbine casing as the support through multiunit bearing, can produce a large amount of heats and big frictional force when the pivot rotates, and these heats and frictional force need use lubricating oil to lubricate, heat reduction to reduce frictional force and temperature, improve the life of bearing.
Generally, the viscosity of lubricating oil is reduced along with the temperature rise, the lubricating oil forms a thin oil film between friction pairs to play a role in lubrication, when the lubricating oil is selected, the lubricating oil is selected according to the working state of equipment (the working temperature of a bearing), once the temperature is exceeded, the viscosity is reduced, the rigidity of the oil film is reduced, the lubrication of the equipment is influenced, and meanwhile, the lubricating oil is accelerated to be oxidized to generate oil sludge and the like; when the temperature is too low, the viscosity increases, the viscosity becomes high, an oil film is difficult to form, and the lubricating effect of the bearing is reduced.
For example, publication No. CN107013266B discloses an oil supply device for a bearing box of a steam turbine, which is composed of a power line, a power switch, a lead, a switch, an oil pipe, an oil pump, an oil tank, lubricating oil, a filter screen, a cooler, an energy accumulator, a liquid pump, cooling liquid, a liquid pool, a heat loss device, a temperature control switch, an overflow valve, an oil inlet pipe, an oil return pipe and a bearing box, wherein the bearing box is provided with the oil inlet pipe and the oil return pipe, and the oil inlet pipe is communicated with the oil tank through the overflow device, the heat loss device, the energy accumulator and the oil pump; the oil return pipe is communicated with the oil tank, lubricating oil circulates between the bearing box and the oil tank under the action of the oil pump, and the lubricating oil in the bearing box is always kept within a set temperature and pressure range under the action of the overflow device, the heat loss device and the energy storage device.
The oil supply device can cool lubricating oil when the rotating shaft rotates at a high speed, but when the steam turbine is started initially, the temperature of the lubricating oil at the position of the bearing is in a low-temperature state, the viscosity of the lubricating oil is high at the moment, an oil film is difficult to form, the lubricating effect of the bearing can be reduced, the service life of the bearing is greatly reduced, cooling equipment is additionally arranged in a hydraulic system, the manufacturing cost is increased, energy in a dry quenching waste heat power generation system can not be well utilized, and the waste of partial energy is caused, so that the steam turbine for dry quenching waste heat power generation is provided to meet the requirement.
Disclosure of Invention
An object of the application provides a steam turbine for dry quenching waste heat power generation, the temperature and the viscosity of lubricating oil in the intelligent recognition bearing oil pocket, the effectual steam turbine that has solved when just starting, lubricating oil is because of the temperature low, it is high to make the viscosity, the oil film is difficult to the formation problem, lubricating oil to the bearing has been improved, and heat through steam, need not increase other heating system, manufacturing cost is reduced, the cooling water through condenser department cools down lubricating oil, abundant utilization the energy among the dry quenching waste heat power generation system, realize the lubricating oil that must change to impurity more and new lubricating oil switch, on the one hand, the production efficiency is improved and the life of bearing is improved, on the other hand does not need artifical monitoring recognition constantly, the amount of labour has been saved.
In order to achieve the above purpose, the present application provides the following technical solutions: a steam turbine for dry quenching waste heat power generation comprises a steam turbine and a bearing arranged on a rotating shaft of the steam turbine, and further comprises a thermostat, a lubricating oil monitoring system, a thermostat, a filter, a first oil tank, a second oil tank, a first oil pump and a second oil pump;
the steam inlet end of the steam turbine is connected with the dry quenching waste heat boiler through a steam injection pipe, the steam outlet end of the steam turbine is connected with the condenser through a steam outlet pipe, and the dry quenching waste heat boiler and the condenser are connected with a circulating water system through circulating pipes;
the first oil tank is connected with the first oil pump through a first oil filling pipe which is fixedly connected with a first section of oil filling main pipe, one end of the first section of the oil injection main pipe is fixedly connected to a thermostat, the second oil tank is connected with the second oil pump through a second oil injection pipe, one end of the second oil filling pipe is fixedly connected to the first section of oil filling main pipe, the thermostat is connected with the bearing oil cavity through the second section of oil filling main pipe, the filter is connected with the bearing oil cavity through a first section of oil return main pipe, the oil outlet end of the filter is fixedly connected with a second section of oil return main pipe, one end of the second section of main oil return pipe is fixedly connected with an oil return branch pipe and an oil return side branch pipe through a tee joint, one end of the oil return branch pipe is fixedly connected to the first oil tank, and one end of the oil return side branch pipe is fixedly connected to the second oil tank;
the steam injection pipe is communicated with the thermostat through a steam branch pipe, the steam discharge pipe is communicated with the thermostat through a steam return pipe, the cold water end of the condenser is communicated with the thermostat through a cooling water injection pipe, and the circulating pipe is communicated with the thermostat through a cooling water return pipe;
the lubricating oil monitoring system is used for monitoring whether the temperature and the viscosity of hydraulic oil in the oil cavity are located at a normal working set value of the bearing when the bearing works, when the temperature exceeds the normal working set value, the thermostat is used for recovering the normal working set value of the lubricating oil, and when the viscosity exceeds the set value, the second oil tank and the second oil pump are used for injecting new lubricating oil into the lubricating oil cavity of the bearing.
Preferably, the lubricating oil monitoring system comprises a temperature sensor for monitoring the current temperature in the bearing oil cavity and a viscosity meter for monitoring the viscosity of the lubricating oil in the bearing oil cavity;
when T is1≤T≤T2If yes, then judge if Δ η is greater than Δ η1Wherein T is the temperature of the lubricating oil in the bearing oil cavity at present, and T1The T2Is a set value of the temperature of the lubricating oil when the bearing 2 normally works, and T1＜T2Δ η is a current viscosity change value of the lubricating oil in the bearing oil cavity, and Δ η1The set value of the viscosity change value of the lubricating oil when the bearing normally works;
if Δ η > [ Δ η ]1The control valve on the first filler pipe is closed, andthe control valve on the second oil filling pipe is opened, the second oil pump injects new hydraulic oil in the second oil tank into a lubricating oil cavity of the bearing through the first section of main oil filling pipe and the second section of main oil filling pipe, and lubricating oil with high viscosity in the lubricating oil cavity of the bearing flows into the first oil tank through the first section of main oil returning pipe, the second section of main oil returning pipe and the oil returning branch pipe;
when T > T2When the lubricating oil passes through the thermostat, the temperature of the lubricating oil in the thermostat is reduced, and the cooled lubricating oil flows into an oil cavity of the bearing through the second section of oil injection main pipe;
when T is less than T1When the temperature of the lubricating oil passes through the thermostat, the warmed lubricating oil flows into the oil cavity of the bearing through the second section of oil injection main pipe.
Preferably, the thermostat includes the box, be provided with a plurality of heat-conducting plates in the box, it is a plurality of install same circulating oil pipe on the heat-conducting plate, circulating oil pipe's both ends respectively with first section oiling is responsible for and second section oiling is responsible for fixed connection, and is a plurality of the top of heat-conducting plate is provided with same cooling water dispersion board, the one end fixed connection of cooling water injection pipe is in on the top of cooling water dispersion board, a plurality of evenly distributed's cooling water dispersion hole has been seted up to the bottom of cooling water dispersion board, it is a plurality of one side of heat-conducting plate is provided with the steam dispersion board, the one end fixed connection of steam distribution pipe is in on one side of steam dispersion board, a plurality of evenly distributed's steam dispersion hole has been seted up to one side of steam dispersion board.
Preferably, the top and the bottom of the heat conducting plate are both provided with a plurality of heat conducting holes.
Preferably, the heat conducting plate is a metal copper plate.
In conclusion, the technical effects and advantages of the invention are as follows:
1. the invention has reasonable structure, and when the steam turbine is just started, the temperature of the lubricating oil in the bearing oil cavity is low, and T is less than T1When in use, the lubricating oil monitoring system identifies and sends out instructions, the control valves on the steam branch pipe and the steam return pipe are opened, the steam injected into the pipe passes through the steam branch pipe and fully heats the circulating oil pipe and the heat conducting plate through a plurality of evenly distributed steam dispersion holes on the steam dispersion plate, so that the circulating oil pipe is heated more evenly and quickly, thereby realizing the temperature increase of the lubricating oil in the circulating oil pipe, when the temperature of the lubricating oil reaches the temperature of the normal working range of the bearing, the oil flows into the oil cavity of the bearing through the second section of the main oil injection pipe, so that when the steam turbine is just started, the lubricating oil has the problems of low temperature, high viscosity and difficult formation of oil film, improves the lubricating effect of the lubricating oil on the bearing, greatly prolongs the service life of the bearing, the coke dry quenching waste heat power generation system is heated by steam, other heating systems are not required to be added, the manufacturing cost is reduced, and energy in the coke dry quenching waste heat power generation system is fully utilized;
2. in the invention, when the rotating shaft in the steam turbine runs at high speed, the bearing bears large force and generates a large amount of heat, the temperature of lubricating oil in the oil cavity of the bearing rises sharply at the moment, and T is more than T2When the temperature of the lubricating oil is reduced to the temperature within the normal working range of the bearing, the lubricating oil flows into an oil cavity of the bearing through a second section of oil injection main pipe, so that the service life of the bearing is effectively prolonged;
3. in the present invention, when T is1≤T≤T2And Δ η > [ Δ η ]1When the temperature of the lubricating oil in the bearing oil cavity is higher than the set viscosity value, the lubricating oil in the bearing oil cavity is at the temperature of the lubricating oil in normal operation, which indicates that the slag in the lubricating oil in the bearing oil cavity is more,the lubricating oil in the first oil tank is always supplied to the bearing oil cavity through the first oil pump, the temperature range of the lubricating oil in the working state of the bearing is kept through the thermostat, the impurities in the lubricating oil are discharged by filtering through the filter in the circulating process of the lubricating oil, the viscosity of the lubricating oil still exceeds the set viscosity value at the moment, the lubricating oil supplied through the first oil tank and the first oil pump is more in impurities, and the new lubricating oil needs to be replaced, the control valve on the second oil filling pipe is opened at the moment, the second oil pump injects the new hydraulic oil in the second oil tank into the lubricating oil cavity of the bearing through the first section of main oil filling pipe and the second section of main oil filling pipe, and the lubricating oil with more impurities is collected into the first oil tank and is replaced in a centralized manner, so that the viscosity of the lubricating oil can be intelligently identified under the condition that the turbine is not stopped, and the switching between the lubricating oil with more impurities and the new lubricating oil is realized, on the one hand, the production efficiency is improved, the service life of the bearing is prolonged, on the other hand, manual monitoring and identification are not needed, and the labor amount is saved.
4. According to the invention, the circulating oil pipe and the plurality of heat conducting plates are arranged, the plurality of heat conducting plates are all metal copper plates, so that the heat conducting property is better, and the plurality of heat conducting plates are provided with the plurality of heat conducting holes, so that the heat conducting effect is further improved, the lubricating oil in the circulating oil pipe can be conveniently heated or cooled, and the heating or cooling speed is high.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
FIG. 1 is a schematic diagram of a steam turbine system for dry quenching waste heat power generation;
FIG. 2 is a perspective view of a thermostat;
FIG. 3 is a schematic perspective view of the interior of the thermostat;
fig. 4 is a perspective view of the heat-conducting fin assembly.
In the figure: 1. a steam turbine; 2. a bearing; 3. a steam injection pipe; 4. a steam discharge pipe; 5. a first oil tank; 6. a second oil tank; 7. a first oil pump; 8. a second oil pump; 9. a first segment of oil injection main pipe; 10. a second filler pipe; 11. a thermostat; 12. a first section of main oil return pipe; 13. oil return side branch pipe; 14. oil return branch pipes; 15. a filter; 16. a condenser; 17. a cooling water injection pipe; 18. a cooling water return pipe; 19. dividing the steam into pipes; 20. returning the steam to the pipe; 21. a first filler pipe; 22. a second section of oil injection main pipe; 23. a cooling water dispersion plate; 24. a steam dispersion plate; 25. a heat conducting plate; 26. a circulating oil pipe; 27. and (4) a box body.
Detailed Description
The technical solutions 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 a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example (b): referring to fig. 1-4, a steam turbine for dry quenching waste heat power generation includes a steam turbine 1, a bearing 2 installed on a rotating shaft of the steam turbine 1, the bearing 2 being installed on a cylinder body of the steam turbine 1 through a bearing bush and a bearing seat, and further includes a thermostat 11, a lubricating oil monitoring system, the thermostat 11, a filter 15, a first oil tank 5, a second oil tank 6, a first oil pump 7, and a second oil pump 8;
the steam input end of a steam turbine 1 is connected with a dry quenching waste heat boiler through a steam injection pipe 3, the steam discharge end of the steam turbine 1 is connected with a condenser 16 through a steam discharge pipe 4, the dry quenching waste heat boiler and the condenser 16 are connected with a circulating water system through circulating pipes, the steam is used for pushing a rotating shaft in the steam turbine 1 to rotate, and the discharged steam is supplied for recycling after being cooled by the condenser 16;
the first oil tank 5 is connected with a first oil pump 7 through a first oil injection pipe 21, the first oil injection pipe 21 is fixedly connected with a first section of oil injection main pipe 9, one end of the first section of oil injection main pipe 9 is fixedly connected to a thermostat 11, the second oil tank 6 is connected with a second oil pump 8 through a second oil injection pipe 10, one end of the second oil injection pipe 10 is fixedly connected to the first section of oil injection main pipe 9, the thermostat 11 is connected with an oil cavity of a bearing 2 through a second section of oil injection main pipe 22, a filter 15 is connected with the oil cavity of the bearing 2 through a first section of oil return main pipe 12, the oil outlet end of the filter 15 is fixedly connected with a second section of oil return main pipe, one end of the second section of oil return main pipe is fixedly connected with an oil return branch pipe 14 and an oil return side branch pipe 13 through a tee joint, one end of the oil return branch pipe 14 is fixedly connected to the first oil tank 5, and one end of the oil return side branch pipe 13 is fixedly connected to the second oil tank 6;
the steam injection pipe 3 is communicated with the thermostat 11 through a steam branch pipe 19, the steam discharge pipe 4 is communicated with the thermostat 11 through a steam return pipe 20, the cold water end of the condenser 16 is communicated with the thermostat 11 through a cooling water injection pipe 17, and the circulating pipe is communicated with the thermostat 11 through a cooling water return pipe 18;
the lubricating oil monitoring system is used for monitoring whether the temperature and the viscosity of hydraulic oil in an oil cavity are located at a normal working set value of the bearing 2 when the bearing 2 works, when the temperature exceeds the normal working set value, the thermostat 11 is used for recovering the normal working set value of the lubricating oil, and when the viscosity exceeds the set value, the second oil tank 6 and the second oil pump 8 are used for injecting new lubricating oil into the lubricating oil cavity of the bearing 2.
As an implementation manner in this embodiment, the lubricating oil monitoring system includes a temperature sensor for monitoring the current temperature in the oil cavity of the bearing 2, and a viscosity meter for monitoring the viscosity of the lubricating oil in the oil cavity of the bearing 2;
when T is1≤T≤T2If yes, then judge if Δ η is greater than Δ η1Wherein T is the temperature of the lubricating oil in the oil cavity of the bearing 2 at present, T1、T2Is a set value, T, of the temperature of the lubricating oil when the bearing 2 is in normal operation1＜T2Δ η is a viscosity change value of the lubricating oil in the oil cavity of the current bearing 2, and Δ η1Is a set value of the viscosity change value of the lubricating oil when the bearing 2 works normally;
if Δ η > [ Δ η ]1First filler pipe 2The control valve on the oil tank 1 is closed, the control valve on the second oil filling pipe 10 is opened, the second oil pump 8 injects new hydraulic oil in the second oil tank 6 into the lubricating oil cavity of the bearing 2 through the first section oil filling main pipe 9 and the second section oil filling main pipe 22, the lubricating oil with high viscosity in the lubricating oil cavity of the bearing 2 flows into the first oil tank 5 through the first section oil returning main pipe 12, the second section oil returning main pipe and the oil returning branch pipe 14, it needs to be described that the lubricating oil in the oil cavity of the bearing 2 is at the temperature in normal operation, the viscosity of the lubricating oil exceeds the set viscosity value, it is described that the slag in the lubricating oil in the oil cavity of the bearing 2 is more and more viscous, the lubricating oil in the first oil tank 5 is always supplied to the oil cavity of the bearing 2 through the first oil pump 7, and the temperature range of the lubricating oil in the working state of the bearing 2 is kept through the thermostat 11, the lubricating oil is filtered by a filter 15 in the circulating process to discharge impurities in the lubricating oil, at the moment, the viscosity of the lubricating oil still exceeds a set viscosity value, the lubricating oil supplied by a first oil tank 5 and a first oil pump 7 is more in impurities and needs to be replaced by new lubricating oil, at the moment, a control valve on a second oil injection pipe 10 is opened, a second oil pump 8 injects new hydraulic oil in a second oil tank 6 into a lubricating oil cavity of the bearing 2 through a first section of main oil injection pipe 9 and a second section of main oil injection pipe 22, the lubricating oil with more impurities is collected into the first oil tank 5 and is replaced in a centralized way, so that the viscosity of the lubricating oil can be intelligently identified under the condition that the steam turbine 1 does not shut down, the switching between the lubricating oil with more impurities and the new lubricating oil is realized, on one hand, the production efficiency is improved, the service life of the bearing 2 is prolonged, on the other hand, manual monitoring and identification are not needed, the labor amount is saved;
when the rotating shaft in the steam turbine 1 runs at high speed, the bearing 2 bears large force and generates a large amount of heat, the temperature of lubricating oil in the oil cavity of the bearing 2 rises sharply at the moment, and T is more than T2During the process, the lubricating oil monitoring system identifies and sends out an instruction, the control valves on the cooling water injection pipe 17 and the cooling water return pipe 18 are opened, the cold water on the condenser 16 flows into the thermostat 11 through the cooling water injection pipe 17, the lubricating oil passing through the thermostat 11 is cooled, and when the temperature of the lubricating oil is reduced to the temperature of the normal working range of the bearing 2, the lubricating oil passes through the thermostat and the cooling water return pipe 18The second section of the oil injection main pipe 22 flows into the oil cavity of the bearing 2, so that the service life of the bearing 2 is effectively prolonged;
when the steam turbine 1 is just started, the temperature of the lubricating oil in the oil cavity of the bearing 2 is low, and T is less than T1During the process, the lubricating oil monitoring system identifies and sends out instructions, control valves on a steam branch pipe 19 and a steam return pipe 20 are opened, high-temperature steam is introduced into the thermostat 11 through the steam branch pipe 19, the lubricating oil passing through the thermostat 11 is heated, when the temperature of the lubricating oil reaches the temperature of the normal working range of the bearing 2, the lubricating oil flows into an oil cavity of the bearing 2 through the second-section oil injection main pipe 22, the problems that the lubricating oil is low in temperature and high in viscosity and an oil film is difficult to form when the steam turbine 1 is just started are effectively solved, the lubricating effect of the lubricating oil on the bearing 2 is improved, the service life of the bearing 2 is greatly prolonged, the steam is used for heating, other heating systems are not needed to be added, the manufacturing cost is reduced, and energy in a dry quenching waste heat power generation system is fully utilized.
As an implementation manner in this embodiment, the thermostat 11 includes a box 27, a plurality of heat conducting plates 25 are disposed in the box 27, the same circulation oil pipe 26 is mounted on the plurality of heat conducting plates 25, both ends of the circulation oil pipe 26 are respectively fixedly connected to the first-stage oil injecting main pipe 9 and the second-stage oil injecting main pipe 22, the same cooling water dispersing plate 23 is disposed on the top of the plurality of heat conducting plates 25, one end of the cooling water injecting pipe 17 is fixedly connected to the top of the cooling water dispersing plate 23, the bottom of the cooling water dispersing plate 23 is provided with a plurality of uniformly distributed cooling water dispersing holes, one side of the plurality of heat conducting plates 25 is provided with a steam dispersing plate 24, one end of the steam distributing pipe 19 is fixedly connected to one side of the steam dispersing plate 24, one side of the steam dispersing plate 24 is provided with a plurality of uniformly distributed steam dispersing holes, by disposing the plurality of heat conducting plates 25, and the circulation oil pipe 26 is located on the plurality of heat conducting plates 25, the heat conducting plates 25 are in full contact, when lubricating oil in the circulating oil pipe 26 is heated, steam in the steam branch pipe 19 fully heats the circulating oil pipe 26 and the heat conducting plates 25 through a plurality of uniformly distributed steam dispersion holes in the steam dispersion plate 24, so that the circulating oil pipe 26 is heated more uniformly and quickly; when the lubricating oil in the circulating oil pipe 26 is cooled, the cold water in the cooling water injection pipe 17 is sufficiently cooled to the circulating oil pipe 26 and the heat conducting plate 25 through the plurality of uniformly distributed cooling water dispersion holes on the cooling water dispersion plate 23, so that the cooling of the circulating oil pipe 26 is more uniform and rapid.
As an implementation manner in this embodiment, the top and the bottom of the heat conducting plate 25 are both provided with a plurality of heat conducting holes, and the heat conducting effect is improved by the heat conducting holes.
As an embodiment in the present embodiment, the heat conducting plate 25 is a copper metal plate, and the copper metal plate has a good heat conducting property.
The working principle of the invention is as follows:
when the steam turbine 1 is just started, the temperature of the lubricating oil in the oil cavity of the bearing 2 is low, and T is less than T1When the temperature of the lubricating oil reaches the temperature of the normal working range of the bearing 2, the lubricating oil flows into the oil cavity of the bearing 2 through the second section oil injection main pipe 22, so that the problems of low temperature, high viscosity and difficult formation of an oil film of the lubricating oil when the steam turbine 1 is just started are effectively solved, the lubricating effect of the lubricating oil on the bearing 2 is improved, the service life of the bearing 2 is greatly prolonged, the steam is heated, and other heating systems are not required to be added, the manufacturing cost is reduced, and the energy in the dry quenching waste heat power generation system is fully utilized.
When the rotating shaft in the steam turbine 1 runs at high speed, the bearing 2 bears large force and generates a large amount of heat, the temperature of lubricating oil in the oil cavity of the bearing 2 rises sharply at the moment, and T is more than T2During the process, the lubricating oil monitoring system recognizes and gives out an instruction, the control valves on the cooling water injection pipe 17 and the cooling water return pipe 18 are opened, the cooling water at the condenser 16 is injected into the cooling water dispersion plate 23 through the cooling water injection pipe 17, and the cooling water is sufficiently distributed through a plurality of cooling water dispersion holes uniformly distributed on the cooling water dispersion plate 23The temperature of the circulating oil pipe 26 and the heat conducting plate 25 is reduced, so that the temperature of the circulating oil pipe 26 is more uniform and faster, when the temperature of the lubricating oil is reduced to the temperature within the normal working range of the bearing 2, the lubricating oil flows into the oil cavity of the bearing 2 through the second-section oil injection main pipe 22, and the service life of the bearing 2 is effectively prolonged.
When T is1≤T≤T2And Δ η > [ Δ η ]1When the lubricating oil in the oil cavity of the bearing 2 is at the temperature during normal operation, the viscosity of the lubricating oil exceeds a set viscosity value, which indicates that the lubricating oil in the oil cavity of the bearing 2 has more slag and is more viscous, the lubricating oil in the first oil tank 5 is always supplied to the oil cavity of the bearing 2 through the first oil pump 7, the lubricating oil is kept in the temperature range during the operating state of the bearing 2 through the thermostat 11, the lubricating oil is filtered through the filter 15 during the circulation process to discharge impurities in the lubricating oil, and the viscosity of the lubricating oil still exceeds the set viscosity value, which indicates that the lubricating oil supplied through the first oil tank 5 and the first oil pump 7 has more impurities and needs to be replaced with new lubricating oil, at this time, the control valve on the second oil injection pipe 10 is opened, the second oil pump 8 injects new hydraulic oil in the second oil tank 6 into the lubricating oil cavity of the bearing 2 through the first main oil injection pipe 9 and the second main oil injection pipe 22, and collect the lubricating oil that impurity is many to first oil tank 5 in, concentrate the change, consequently can be under the condition that steam turbine 1 does not shut down, the viscosity of intelligent identification lubricating oil to the realization has improved production efficiency and has improved the life of bearing 2 to the many lubricating oil that must be changed of impurity switches with new lubricating oil, on the one hand, and on the other hand does not need artifical monitoring identification constantly, has saved the amount of labour.
Through setting up oil pipe 26, a plurality of heat-conducting plates 25 are the metal copper, have better heat conductivity to be provided with a plurality of heat-conducting holes on a plurality of heat-conducting plates 25, further improved the heat conduction effect, thereby be convenient for heat or cool down the lubricating oil in oil pipe 26, and heat or cooling speed is fast.
Finally, it should be noted that: 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 or portions thereof without departing from the spirit and scope of the invention.
Claims (5)
1. A steam turbine for dry quenching waste heat power generation comprises a steam turbine (1) and a bearing (2) arranged on a rotating shaft of the steam turbine (1), and is characterized by further comprising a thermostat (11), a lubricating oil monitoring system, the thermostat (11), a filter (15), a first oil tank (5), a second oil tank (6), a first oil pump (7) and a second oil pump (8);
the steam inlet end of the steam turbine (1) is connected with a dry quenching waste heat boiler through a steam injection pipe (3), the steam outlet end of the steam turbine (1) is connected with a condenser (16) through a steam outlet pipe (4), and the dry quenching waste heat boiler and the condenser (16) are connected with a circulating water system through circulating pipes;
the utility model discloses a bearing (2) oil chamber, including first oil tank (5) with first oil pump (7) are connected through first notes oil pipe (21), first section notes oil pipe (21) fixedly connected with is responsible for (9), the one end fixed connection that first section notes oil was responsible for (9) is on thermostat (11), second oil tank (6) with second oil pump (8) are connected through second notes oil pipe (10), the one end fixed connection of second notes oil pipe (10) is responsible for (9) on first section notes oil, thermostat (11) with bearing (2) oil chamber is connected through second section notes oil pipe (22), filter (15) with bearing (2) oil chamber is connected through first section oil return (12), the oil outlet end fixedly connected with second section oil return of filter (15) is responsible for, the one end that second section is responsible for through tee bend fixedly connected with oil return and is divided to manage (14) and oil return side and is divided to manage (13), one end of the oil return branch pipe (14) is fixedly connected to the first oil tank (5), and one end of the oil return side branch pipe (13) is fixedly connected to the second oil tank (6);
the steam injection pipe (3) is communicated with the thermostat (11) through a steam branch pipe (19), the steam discharge pipe (4) is communicated with the thermostat (11) through a steam return pipe (20), the cold water end of the condenser (16) is communicated with the thermostat (11) through a cooling water injection pipe (17), and the circulating pipe is communicated with the thermostat (11) through a cooling water return pipe (18);
the lubricating oil monitoring system is used for monitoring whether the temperature and the viscosity of hydraulic oil in the oil cavity are located when the bearing (2) works, when the temperature exceeds a normal working set value, the thermostat (11) is used for recovering the normal working set value of lubricating oil, and when the viscosity exceeds the set value, the second oil tank (6) and the second oil pump (8) are used for injecting new lubricating oil into the lubricating oil cavity of the bearing (2).
2. The steam turbine for dry quenching waste heat power generation according to claim 1, characterized in that: the lubricating oil monitoring system comprises a temperature sensor and a viscosity measuring instrument, wherein the temperature sensor is used for monitoring the current temperature in the oil cavity of the bearing (2), and the viscosity measuring instrument is used for monitoring the viscosity of the lubricating oil in the oil cavity of the bearing (2);
when T is1≤T≤T2If yes, then judge if Δ η is greater than Δ η1Wherein T is the temperature of the lubricating oil in the oil cavity of the bearing (2), and T is1The T2Is a set value T of the temperature of the lubricating oil when the bearing (2) normally works1＜T2Δ η is the current viscosity change value of the lubricating oil in the oil cavity of the bearing (2), and Δ η1Is a set value of the viscosity change value of the lubricating oil when the bearing (2) normally works;
if Δ η > [ Δ η ]1The control valve on the first oiling pipe (21) is closed, the control valve on the second oiling pipe (10) is opened, the second oil pump (8) will new hydraulic oil in the second oil tank (6) is responsible for (9) through first section oiling second section oiling is responsible for (22) and is injected into in the lubricating oil cavity of bearing (2), the high lubricating oil of viscosity in the lubricating oil cavity of bearing (2) passes through first section oil return is responsible for (12) the second section oil return is responsible for the oil returnThe branch pipe (14) flows into the first oil tank (5);
when T > T2When the lubricating oil is cooled, control valves on the cooling water injection pipe (17) and the cooling water return pipe (18) are opened, cold water on the condenser (16) flows into the thermostat (11) through the cooling water injection pipe (17), the lubricating oil passing through the thermostat (11) is cooled, and the cooled lubricating oil flows into an oil cavity of the bearing (2) through the second section of oil injection main pipe (22);
when T is less than T1When the lubricating oil temperature-rising device is used, the control valves on the steam branch pipe (19) and the steam return pipe (20) are opened, high-temperature steam is introduced into the thermostat (11) through the steam branch pipe (19), the lubricating oil passing through the thermostat (11) is heated, and the heated lubricating oil flows into an oil cavity of the bearing (2) through the second-section oil injection main pipe (22).
3. The steam turbine for dry quenching waste heat power generation according to claim 1, characterized in that: the thermostat (11) comprises a box body (27), wherein a plurality of heat-conducting plates (25) are arranged in the box body (27), the heat-conducting plates (25) are provided with a same circulating oil pipe (26), two ends of the circulating oil pipe (26) are respectively fixedly connected with a first section oil injection main pipe (9) and a second section oil injection main pipe (22), the top of each heat-conducting plate (25) is provided with a same cooling water dispersion plate (23), one end of a cooling water injection pipe (17) is fixedly connected onto the top of the cooling water dispersion plate (23), the bottom of the cooling water dispersion plate (23) is provided with a plurality of cooling water dispersion holes which are uniformly distributed, the heat-conducting plates (25) are provided with a steam dispersion plate (24) on one side, one end of a steam branch pipe (19) is fixedly connected onto one side of the steam dispersion plate (24), one side of the steam dispersion plate (24) is provided with a plurality of uniformly distributed steam dispersion holes.
4. The steam turbine for dry quenching waste heat power generation according to claim 3, characterized in that: the top and the bottom of the heat conducting plate (25) are both provided with a plurality of heat conducting holes.
5. The steam turbine for dry quenching waste heat power generation according to claim 4, characterized in that: the heat conducting plate (25) is a metal copper plate.
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| CN114508391A (en) * | 2022-03-17 | 2022-05-17 | 西安热工研究院有限公司 | Monitoring and early warning system and method for turbine lubricating oil system |
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