US20230096279A1 - Vacuum system having condenser and root vacuum pump set - Google Patents
Vacuum system having condenser and root vacuum pump set Download PDFInfo
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- US20230096279A1 US20230096279A1 US17/485,532 US202117485532A US2023096279A1 US 20230096279 A1 US20230096279 A1 US 20230096279A1 US 202117485532 A US202117485532 A US 202117485532A US 2023096279 A1 US2023096279 A1 US 2023096279A1
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- root
- vacuum pump
- condenser
- vacuum
- air
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- 238000001816 cooling Methods 0.000 claims abstract description 26
- 230000006835 compression Effects 0.000 claims abstract description 4
- 238000007906 compression Methods 0.000 claims abstract description 4
- 239000007788 liquid Substances 0.000 claims description 28
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 11
- 238000004064 recycling Methods 0.000 claims description 8
- 239000008234 soft water Substances 0.000 claims description 7
- 238000011010 flushing procedure Methods 0.000 claims description 2
- 239000012535 impurity Substances 0.000 claims description 2
- 239000012466 permeate Substances 0.000 claims description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 230000004224 protection Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B41/00—Pumping installations or systems specially adapted for elastic fluids
- F04B41/06—Combinations of two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C18/00—Rotary-piston pumps specially adapted for elastic fluids
- F04C18/08—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing
- F04C18/12—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type
- F04C18/126—Rotary-piston pumps specially adapted for elastic fluids of intermeshing-engagement type, i.e. with engagement of co-operating members similar to that of toothed gearing of other than internal-axis type with radially from the rotor body extending elements, not necessarily co-operating with corresponding recesses in the other rotor, e.g. lobes, Roots type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B23/00—Pumping installations or systems
- F04B23/04—Combinations of two or more pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C23/00—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids
- F04C23/001—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle
- F04C23/003—Combinations of two or more pumps, each being of rotary-piston or oscillating-piston type, specially adapted for elastic fluids; Pumping installations specially adapted for elastic fluids; Multi-stage pumps specially adapted for elastic fluids of similar working principle having complementary function
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C25/00—Adaptations of pumps for special use of pumps for elastic fluids
- F04C25/02—Adaptations of pumps for special use of pumps for elastic fluids for producing high vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/02—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for several pumps connected in series or in parallel
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/06—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids specially adapted for stopping, starting, idling or no-load operation
- F04C28/065—Capacity control using a multiplicity of units or pumping capacities, e.g. multiple chambers, individually switchable or controllable
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/08—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by varying the rotational speed
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C28/00—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids
- F04C28/24—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves
- F04C28/26—Control of, monitoring of, or safety arrangements for, pumps or pumping installations specially adapted for elastic fluids characterised by using valves controlling pressure or flow rate, e.g. discharge valves or unloading valves using bypass channels
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2220/00—Application
- F04C2220/10—Vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2220/00—Application
- F04C2220/20—Pumps with means for separating and evacuating the gaseous phase
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/50—Bearings
- F04C2240/52—Bearings for assemblies with supports on both sides
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2240/00—Components
- F04C2240/80—Other components
- F04C2240/81—Sensor, e.g. electronic sensor for control or monitoring
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/18—Pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04C—ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS
- F04C2270/00—Control; Monitoring or safety arrangements
- F04C2270/42—Conditions at the inlet of a pump or machine
Definitions
- the present invention is related to root pumps, and in particular to a vacuum system having a condenser and a root vacuum pump set
- the power generator sets are divided as water cooling generator sets and air cooling condenser of the generator sets.
- the types of air cooling power generator sets may be classified into direct air cooling form and indirect air cooling form.
- a direct air cooling condenser of the generator set has a condenser.
- an indirect air cooling condenser of the generator set has no condenser.
- An air cooling condenser of the generator is required to be operated under a vacuum state, so maintaining a vacuum system to generate a vacuum state is necessary.
- the vacuum maintaining system of an air cooling power generator usually uses a liquid circulating vacuum pump system which can be used to maintain a vacuum state.
- the prior technology for a liquid circulating vacuum pump system of an air cooling power generator condenser sets mainly uses a single liquid circulating vacuum pump system.
- using above technology consumes large amounts of electric powers and water.
- the volume of liquid circulating vacuum pump system is large and occupies a big space.
- the liquid circulating vacuum pump systems generate greater noises and need expensive maintaining costs, so using liquid circulating vacuum pump leads to a large space occupation and higher costs.
- the present invention provides a new vacuum system based on a self equipped up front installed condenser set and a multiple stage special custom made roots pumps and liquid ring vacuum system to solve the defects mentioned above.
- the object of the present invention is to provide a vacuum system having an independent condenser set and a root vacuum pump set, wherein the independent inlet condenser set, the root vacuum pump set and the backing pump are formed as a vacuum system which is used as vacuum maintaining system for an air cooling power generator set.
- the power and water consumptions of the air cooling power generator system are greatly reduced.
- the condensed water is reused by using the liquid collecting and recycling tank unit. Therefore, the system of the present invention not only reduces the power consumption, but also reduces the whole maintaining cost. Furthermore the objects of reduction of water usage and environmental protections are achieved.
- the present invention provides a vacuum system having an independent inlet condenser set and a root vacuum pump set, comprising: an independent inlet condenser set having an inlet end for receiving vapor inputted from an output of an air cooling power generator condenser of a generator; the output vapor which is mixture of non-condensable air and water steam; the water steam capable to be condensed, and the surplus air being outputted; a root vacuum pump set including at least one root vacuum pump; the root vacuum pump set further including an input end and an output end; the input end being connected to the independent inlet condenser set; air outputted from the independent inlet condenser set being inputted to the at least one root vacuum pump for compression and then the compressed air being outputted from the output end and a backing pump connected to the output end of the root vacuum pump set by using an output pipe; the backing pump serving to receive air outputted from the root vacuum pump set.
- FIG. 1 is a schematic view showing the assembly of the elements of the present invention.
- FIG. 2 is a schematic view showing another assembly of the elements of the present invention.
- FIG. 3 is a schematic view showing a further assembly of the elements of the present invention.
- FIG. 4 is a schematic cross section view of the root vacuum pump of the present invention.
- the present invention includes the following elements.
- An independent inlet condenser set 10 has an inlet end 11 for receiving vapor inputted from an output of an air cooling power generator condenser 100 of a generator 1 .
- the output vapor of the air cooling power generator condenser 100 is mixture of non-condensable air and water steam.
- the water steam in the output vapor is capable to be condensed by the independent inlet condenser set 10 and the volume thereof is reduced for reducing the air amount inputted to the succeeding elements. In this way, the vacuum system is as if enlarged.
- the air pressure in the inlet end 11 of the independent inlet condenser set 10 can be as larger as 10000 ⁇ 25000 Pa (Pascal), although higher vacuum level or lower pressure is more favorable.
- the independent inlet condenser set 10 may be condensers of any form.
- the independent inlet condenser set 10 is connected to a liquid collecting and recycling tank unit 20 for collecting condensed liquid (such as soft water) from the independent inlet condenser set 10 , in that the soft water from the air cooling power generator condenser 100 .
- the liquid collecting and recycling tank unit 20 has an automatic double valve set up device 201 and a water level gauge 202 that is connected to a controller 203 .
- the controller 203 has DCS (Distributed Control System) or PLC (Programmable Logic Control) (not show). Therefore, the liquid collecting and recycling tank unit 20 is capable to recycle soft water automatically and continuously without interrupting the vacuum system working.
- the condensed liquid and soft water can be reused.
- a root vacuum pump set 30 includes at least one root vacuum pump 40 .
- the root vacuum pump set 30 further includes an input end 31 and an output end 32 .
- the input end 31 is connected to the independent inlet condenser set 10 .
- Air outputted from the independent inlet condenser set 10 is inputted to the at least one root vacuum pump 40 for compression and then the compressed air is outputted from the output end 32 .
- Any of the root vacuum pump 40 may be any kind of root vacuum pump, preferably, it can suffer from pressure greater than one or several tens of thousands Pa, for example, two blade root vacuum pump, three blade root vacuum pumps, air cooling root vacuum pump, or cascade root vacuum pump, etc.
- Each root vacuum pump 40 is connected to an electric driving device 405 for driving a respective root vacuum pump 40 .
- each said root vacuum pump 40 has a casing 41 which has an inlet 411 and an outlet 412 .
- An interior of the casing 41 is formed with a vacuum chamber 42 and two bearing rooms 43 at two sides of the vacuum chamber 42 .
- the vacuum chamber 42 is connected and communicated to the inlet 411 and the outlet 412 .
- a driving shaft 44 is installed within the casing 41 and penetrates through the vacuum chamber 42 and the two bearing rooms 43 .
- One end of the driving shaft 44 passes out of a right wall 415 of the casing 41 .
- a blade set 45 is installed within the vacuum chamber 42 and is installed on the driving shaft 44 .
- the gas mixture is inputted from the inlet 411 to the vacuum chamber 42 . By rotation of the blade set 45 , the gas mixture is compressed and is outputted from the outlet 412 .
- Inner connection walls 413 , 414 between the vacuum chamber 42 and the two bearing rooms 43 are installed with respective bearings 46 which are arranged to be around the driving shaft 44 ; as well as an opening of the right wall 415 of the casing 41 is formed with another bearing 46 around the driving shaft 44 .
- the bearings 46 support the driving shaft 44 .
- the bearings 46 completely seal spaces between the driving shaft 44 and the inner walls of the casing 41 so that the vacuum chamber 42 is completely isolated from the two bearing rooms 43 . Therefore, liquid out of the casing 41 and in the two bearing rooms 43 cannot permeate into the vacuum chamber 42 .
- the gas mixture in the vacuum chamber 42 cannot enter into the bearing rooms 43 . Therefore, in operation, interior of the vacuum chamber 42 of the root vacuum pump 40 only has original air and the gas mixture without any impurities. Moreover, liquid within the bearing rooms 43 cannot drain out of the casing 41 .
- the root vacuum pump 40 has a complete sealing structure, which is not half-sealed structure. Therefore, in the present invention, the vacuum chamber 42 , the bearing rooms 43 and other related driving structures (such as gears) are completely isolated from liquid so as to avoid of the problems of vapors, emulsions or drainages, etc.
- the root vacuum pump 40 has a structure which can suffer a great pressure difference.
- the great pressure means that the root vacuum pump 40 can operate under an inlet pressure of 5000 Pa to 30000 Pa in a whole day under a condition that the condenser is in a vacuum state and can suffer from a pressure difference larger than 5000 Pa.
- General prior root vacuum pump cannot work under this condition.
- the root vacuum pump 40 is a high temperature tolerance pump, that is, the root vacuum pump 40 can operates under temperatures larger than 130° C. In operation, the gas temperature of the vacuum chamber 42 of the root vacuum pump 40 will achieve to 200° C.
- the root vacuum pump set 30 maybe has only one root vacuum pump 40 .
- the root vacuum pump set 30 includes a plurality of root vacuum pumps 40 which are serially connected.
- the air outputted from the independent inlet condenser set 10 flows through the plurality of root vacuum pumps 40 sequentially for being compressed several times.
- Two adjacent root vacuum pumps 40 are connected by an air pipe 401 .
- the at least root vacuum pump 40 is maybe a root vacuum pump 40 or a plurality of root vacuum pumps 40 for dividing the total pressure so that the whole power in the system is reduced and the water consumed is decreased.
- a backing pump 50 is connected to the output end 32 of the root vacuum pump set 30 by using an output pipe 33 .
- the backing pump 50 serves to receive air outputted from the root vacuum pump set 30 .
- the backing pump 50 is a backing pump of any form, preferably, the output air thereof can be drained out to the atmosphere, such as a liquid circulated pump, a vapor jet pump, an atmosphere jet pump or a water flushing pump.
- the backing pump 50 can be connected to an electric driving device 55 for driving the backing pump 50 .
- the root vacuum pump set 30 serves to compress air from the independent inlet condenser set 10 so as to reduce the volume of the air. Therefore, the air pumped from the backing pump 50 is reduced.
- the backing pump 50 may be not acted, while the air from the root vacuum pump set 30 directly bypasses through the backing pump 50 to be drained out. Because the backing pump 50 does not act, the power consumed is saved.
- a heat exchanger 60 is serially connected to the output pipe 33 for cooling air outputted from the root vacuum pump set 30 and the cooled air is inputted to the backing pump 50 .
- the heat exchanger 60 may be a heat exchanger of any form.
- the output pipe 33 is further serially connected to a wave shape pipe 80 so as to retain the preferred sealing effect of the output pipe 33 .
- the present invention further includes a supporting frame 70 which is connected to the root vacuum pump set 30 and the backing pump 50 .
- the supporting frame 70 serves to support the root vacuum pump set 30 and the backing pump 50 .
- the supporting frame 70 includes the steel welding elements.
- the independent inlet condenser set, the root vacuum pump set and the backing pump are formed as a vacuum system which is used as vacuum maintaining system for an air cooling power generator set.
- the power and water consumptions of the air cooling power generator system is greatly reduced.
- the condensed water is reused by using the liquid collecting and recycling tank unit. Therefore, the system of the present invention not only reduces the power consumption, but also reduces the whole maintaining cost. Furthermore the objects of reduction of water usage and environmental protections are achieved.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Applications Or Details Of Rotary Compressors (AREA)
Abstract
Description
- The present invention is related to root pumps, and in particular to a vacuum system having a condenser and a root vacuum pump set
- Currently, for power generators used in power plants, the power generator sets are divided as water cooling generator sets and air cooling condenser of the generator sets. The types of air cooling power generator sets may be classified into direct air cooling form and indirect air cooling form. A direct air cooling condenser of the generator set has a condenser. On contrast, an indirect air cooling condenser of the generator set has no condenser. An air cooling condenser of the generator is required to be operated under a vacuum state, so maintaining a vacuum system to generate a vacuum state is necessary. The vacuum maintaining system of an air cooling power generator usually uses a liquid circulating vacuum pump system which can be used to maintain a vacuum state.
- The prior technology for a liquid circulating vacuum pump system of an air cooling power generator condenser sets mainly uses a single liquid circulating vacuum pump system. However, using above technology consumes large amounts of electric powers and water. The volume of liquid circulating vacuum pump system is large and occupies a big space. Furthermore, the liquid circulating vacuum pump systems generate greater noises and need expensive maintaining costs, so using liquid circulating vacuum pump leads to a large space occupation and higher costs.
- Most of power plants use liquid circulating vacuum pumps to improve the vacuum level. The capabilities of drawing air decline, while air etching occurs. Especially in summer, the liquid circulating vacuum pump is easier to be eroded to cause that the capability of drawing air declines rapidly especially, when the temperature is high. Therefore, the vacuum state of air cooling condenser sets becomes worse, and the efficiency of steam turbine is low, so that the coal consumption increases.
- The present invention provides a new vacuum system based on a self equipped up front installed condenser set and a multiple stage special custom made roots pumps and liquid ring vacuum system to solve the defects mentioned above.
- Accordingly, the object of the present invention is to provide a vacuum system having an independent condenser set and a root vacuum pump set, wherein the independent inlet condenser set, the root vacuum pump set and the backing pump are formed as a vacuum system which is used as vacuum maintaining system for an air cooling power generator set. In the structure of the present invention, the power and water consumptions of the air cooling power generator system are greatly reduced. The condensed water is reused by using the liquid collecting and recycling tank unit. Therefore, the system of the present invention not only reduces the power consumption, but also reduces the whole maintaining cost. Furthermore the objects of reduction of water usage and environmental protections are achieved.
- To achieve above object, the present invention provides a vacuum system having an independent inlet condenser set and a root vacuum pump set, comprising: an independent inlet condenser set having an inlet end for receiving vapor inputted from an output of an air cooling power generator condenser of a generator; the output vapor which is mixture of non-condensable air and water steam; the water steam capable to be condensed, and the surplus air being outputted; a root vacuum pump set including at least one root vacuum pump; the root vacuum pump set further including an input end and an output end; the input end being connected to the independent inlet condenser set; air outputted from the independent inlet condenser set being inputted to the at least one root vacuum pump for compression and then the compressed air being outputted from the output end and a backing pump connected to the output end of the root vacuum pump set by using an output pipe; the backing pump serving to receive air outputted from the root vacuum pump set.
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FIG. 1 is a schematic view showing the assembly of the elements of the present invention. -
FIG. 2 is a schematic view showing another assembly of the elements of the present invention. -
FIG. 3 is a schematic view showing a further assembly of the elements of the present invention. -
FIG. 4 is a schematic cross section view of the root vacuum pump of the present invention. - In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.
- With reference to
FIGS. 1 to 3 , the structure of the present invention is illustrated. The present invention includes the following elements. - An independent
inlet condenser set 10 has aninlet end 11 for receiving vapor inputted from an output of an air coolingpower generator condenser 100 of agenerator 1. The output vapor of the air coolingpower generator condenser 100 is mixture of non-condensable air and water steam. The water steam in the output vapor is capable to be condensed by the independent inlet condenser set 10 and the volume thereof is reduced for reducing the air amount inputted to the succeeding elements. In this way, the vacuum system is as if enlarged. The air pressure in theinlet end 11 of the independent inlet condenser set 10 can be as larger as 10000˜25000 Pa (Pascal), although higher vacuum level or lower pressure is more favorable. The independent inlet condenser set 10 may be condensers of any form. - The independent
inlet condenser set 10 is connected to a liquid collecting andrecycling tank unit 20 for collecting condensed liquid (such as soft water) from the independent inlet condenser set 10, in that the soft water from the air coolingpower generator condenser 100. The liquid collecting andrecycling tank unit 20 has an automatic double valve set updevice 201 and awater level gauge 202 that is connected to acontroller 203. Thecontroller 203 has DCS (Distributed Control System) or PLC (Programmable Logic Control) (not show). Therefore, the liquid collecting andrecycling tank unit 20 is capable to recycle soft water automatically and continuously without interrupting the vacuum system working. The condensed liquid and soft water can be reused. - A root
vacuum pump set 30 includes at least oneroot vacuum pump 40. The root vacuum pump set 30 further includes aninput end 31 and anoutput end 32. Theinput end 31 is connected to the independent inlet condenser set 10. Air outputted from the independentinlet condenser set 10 is inputted to the at least oneroot vacuum pump 40 for compression and then the compressed air is outputted from theoutput end 32. Any of theroot vacuum pump 40 may be any kind of root vacuum pump, preferably, it can suffer from pressure greater than one or several tens of thousands Pa, for example, two blade root vacuum pump, three blade root vacuum pumps, air cooling root vacuum pump, or cascade root vacuum pump, etc. - Each
root vacuum pump 40 is connected to anelectric driving device 405 for driving a respectiveroot vacuum pump 40. - Referring to
FIG. 4 , each saidroot vacuum pump 40 has acasing 41 which has aninlet 411 and anoutlet 412. An interior of thecasing 41 is formed with avacuum chamber 42 and twobearing rooms 43 at two sides of thevacuum chamber 42. Thevacuum chamber 42 is connected and communicated to theinlet 411 and theoutlet 412. Adriving shaft 44 is installed within thecasing 41 and penetrates through thevacuum chamber 42 and the twobearing rooms 43. One end of the drivingshaft 44 passes out of aright wall 415 of thecasing 41. Ablade set 45 is installed within thevacuum chamber 42 and is installed on thedriving shaft 44. The gas mixture is inputted from theinlet 411 to thevacuum chamber 42. By rotation of the blade set 45, the gas mixture is compressed and is outputted from theoutlet 412. -
Inner connection walls vacuum chamber 42 and the twobearing rooms 43 are installed withrespective bearings 46 which are arranged to be around thedriving shaft 44; as well as an opening of theright wall 415 of thecasing 41 is formed with anotherbearing 46 around thedriving shaft 44. Thebearings 46 support thedriving shaft 44. Thebearings 46 completely seal spaces between thedriving shaft 44 and the inner walls of thecasing 41 so that thevacuum chamber 42 is completely isolated from the twobearing rooms 43. Therefore, liquid out of thecasing 41 and in the twobearing rooms 43 cannot permeate into thevacuum chamber 42. Furthermore, the gas mixture in thevacuum chamber 42 cannot enter into thebearing rooms 43. Therefore, in operation, interior of thevacuum chamber 42 of theroot vacuum pump 40 only has original air and the gas mixture without any impurities. Moreover, liquid within thebearing rooms 43 cannot drain out of thecasing 41. - In the present invention, the
root vacuum pump 40 has a complete sealing structure, which is not half-sealed structure. Therefore, in the present invention, thevacuum chamber 42, thebearing rooms 43 and other related driving structures (such as gears) are completely isolated from liquid so as to avoid of the problems of vapors, emulsions or drainages, etc. - The
root vacuum pump 40 has a structure which can suffer a great pressure difference. The great pressure means that theroot vacuum pump 40 can operate under an inlet pressure of 5000 Pa to 30000 Pa in a whole day under a condition that the condenser is in a vacuum state and can suffer from a pressure difference larger than 5000 Pa. General prior root vacuum pump cannot work under this condition. - The
root vacuum pump 40 is a high temperature tolerance pump, that is, theroot vacuum pump 40 can operates under temperatures larger than 130° C. In operation, the gas temperature of thevacuum chamber 42 of theroot vacuum pump 40 will achieve to 200° C. - With reference to
FIG. 1 , the root vacuum pump set 30 maybe has only oneroot vacuum pump 40. - Referring to
FIG. 2 , the root vacuum pump set 30 includes a plurality ofroot vacuum pumps 40 which are serially connected. The air outputted from the independent inlet condenser set 10 flows through the plurality ofroot vacuum pumps 40 sequentially for being compressed several times. Two adjacentroot vacuum pumps 40 are connected by anair pipe 401. - The at least
root vacuum pump 40 is maybe aroot vacuum pump 40 or a plurality ofroot vacuum pumps 40 for dividing the total pressure so that the whole power in the system is reduced and the water consumed is decreased. - A
backing pump 50 is connected to theoutput end 32 of the root vacuum pump set 30 by using anoutput pipe 33. Thebacking pump 50 serves to receive air outputted from the root vacuum pump set 30. Thebacking pump 50 is a backing pump of any form, preferably, the output air thereof can be drained out to the atmosphere, such as a liquid circulated pump, a vapor jet pump, an atmosphere jet pump or a water flushing pump. - The
backing pump 50 can be connected to anelectric driving device 55 for driving thebacking pump 50. - By the above mentioned structure, the root vacuum pump set 30 serves to compress air from the independent inlet condenser set 10 so as to reduce the volume of the air. Therefore, the air pumped from the
backing pump 50 is reduced. When the air pressure of the air from theroot vacuum pump 40 of the root vacuum pump set 30 is lower than a predetermined value, thebacking pump 50 may be not acted, while the air from the root vacuum pump set 30 directly bypasses through thebacking pump 50 to be drained out. Because thebacking pump 50 does not act, the power consumed is saved. - A
heat exchanger 60 is serially connected to theoutput pipe 33 for cooling air outputted from the root vacuum pump set 30 and the cooled air is inputted to thebacking pump 50. Theheat exchanger 60 may be a heat exchanger of any form. - The
output pipe 33 is further serially connected to awave shape pipe 80 so as to retain the preferred sealing effect of theoutput pipe 33. Referring toFIG. 3 , the present invention further includes a supportingframe 70 which is connected to the root vacuum pump set 30 and thebacking pump 50. The supportingframe 70 serves to support the root vacuum pump set 30 and thebacking pump 50. Preferably, the supportingframe 70 includes the steel welding elements. - Advantages of the present invention are that: the independent inlet condenser set, the root vacuum pump set and the backing pump are formed as a vacuum system which is used as vacuum maintaining system for an air cooling power generator set. In the structure of the present invention, the power and water consumptions of the air cooling power generator system is greatly reduced. The condensed water is reused by using the liquid collecting and recycling tank unit. Therefore, the system of the present invention not only reduces the power consumption, but also reduces the whole maintaining cost. Furthermore the objects of reduction of water usage and environmental protections are achieved.
- The present invention is thus described, it will be obvious that the same may be varied in many ways. Such variations are not to be regarded as a departure from the spirit and scope of the present invention, and all such modifications as would be obvious to one skilled in the art are intended to be included within the scope of the following claims.
Claims (17)
Priority Applications (2)
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US17/485,532 US20230096279A1 (en) | 2021-09-27 | 2021-09-27 | Vacuum system having condenser and root vacuum pump set |
US18/161,906 US20230167822A1 (en) | 2021-09-27 | 2023-01-31 | Vacuum system having condenser and root vacuum pump set |
Applications Claiming Priority (1)
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US17/485,532 US20230096279A1 (en) | 2021-09-27 | 2021-09-27 | Vacuum system having condenser and root vacuum pump set |
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US18/161,906 Continuation-In-Part US20230167822A1 (en) | 2021-09-27 | 2023-01-31 | Vacuum system having condenser and root vacuum pump set |
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US17/485,532 Abandoned US20230096279A1 (en) | 2021-09-27 | 2021-09-27 | Vacuum system having condenser and root vacuum pump set |
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US3642384A (en) * | 1969-11-19 | 1972-02-15 | Henry Huse | Multistage vacuum pumping system |
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US5131817A (en) * | 1990-03-22 | 1992-07-21 | The Nash Engineering Company | Two-stage pumping system |
US20100266433A1 (en) * | 2007-11-14 | 2010-10-21 | Ulvac, Inc. | Multi-stage dry pump |
US8251678B2 (en) * | 2006-01-31 | 2012-08-28 | Ebara Corporation | Vacuum pump unit |
US20140250978A1 (en) * | 2013-03-07 | 2014-09-11 | Edward B. McCauley | Evacuable Inlet for Gas Chromatograph Injector |
US20160130984A1 (en) * | 2013-03-15 | 2016-05-12 | Electratherm, Inc. | Apparatus, systems, and methods for low grade waste heat management |
US20180023571A1 (en) * | 2015-02-12 | 2018-01-25 | Mayekawa Mfg. Co., Ltd. | Oil-flooded screw compressor system and method for modifying the same |
US20190309756A1 (en) * | 2016-07-12 | 2019-10-10 | Elivac Company, Ltd. | Multistage power saving vacuum device with root vacuum pump in first stage |
US20210010474A1 (en) * | 2018-03-14 | 2021-01-14 | Edwards Technologies Vacuum Engineering (Qingdao), Co. Ltd. | Liquid ring pump control |
-
2021
- 2021-09-27 US US17/485,532 patent/US20230096279A1/en not_active Abandoned
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US3642384A (en) * | 1969-11-19 | 1972-02-15 | Henry Huse | Multistage vacuum pumping system |
US3922110A (en) * | 1974-01-28 | 1975-11-25 | Henry Huse | Multi-stage vacuum pump |
US5131817A (en) * | 1990-03-22 | 1992-07-21 | The Nash Engineering Company | Two-stage pumping system |
US8251678B2 (en) * | 2006-01-31 | 2012-08-28 | Ebara Corporation | Vacuum pump unit |
US20100266433A1 (en) * | 2007-11-14 | 2010-10-21 | Ulvac, Inc. | Multi-stage dry pump |
US20140250978A1 (en) * | 2013-03-07 | 2014-09-11 | Edward B. McCauley | Evacuable Inlet for Gas Chromatograph Injector |
US20160130984A1 (en) * | 2013-03-15 | 2016-05-12 | Electratherm, Inc. | Apparatus, systems, and methods for low grade waste heat management |
US20180023571A1 (en) * | 2015-02-12 | 2018-01-25 | Mayekawa Mfg. Co., Ltd. | Oil-flooded screw compressor system and method for modifying the same |
US20190309756A1 (en) * | 2016-07-12 | 2019-10-10 | Elivac Company, Ltd. | Multistage power saving vacuum device with root vacuum pump in first stage |
US20210010474A1 (en) * | 2018-03-14 | 2021-01-14 | Edwards Technologies Vacuum Engineering (Qingdao), Co. Ltd. | Liquid ring pump control |
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