CN108252743A - A kind of full stream circulation electric generating apparatus for geothermal energy - Google Patents
A kind of full stream circulation electric generating apparatus for geothermal energy Download PDFInfo
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- CN108252743A CN108252743A CN201810057334.0A CN201810057334A CN108252743A CN 108252743 A CN108252743 A CN 108252743A CN 201810057334 A CN201810057334 A CN 201810057334A CN 108252743 A CN108252743 A CN 108252743A
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- vacuum pump
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 27
- 230000008878 coupling Effects 0.000 claims abstract description 23
- 238000010168 coupling process Methods 0.000 claims abstract description 23
- 238000005859 coupling reaction Methods 0.000 claims abstract description 23
- 239000000203 mixture Substances 0.000 claims description 21
- 239000007788 liquid Substances 0.000 claims description 15
- 230000005494 condensation Effects 0.000 claims description 3
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 3
- 239000000284 extract Substances 0.000 claims description 3
- 239000012535 impurity Substances 0.000 claims description 3
- 239000012071 phase Substances 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 238000010248 power generation Methods 0.000 description 5
- 239000007791 liquid phase Substances 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C1/00—Rotary-piston machines or engines
- F01C1/08—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing
- F01C1/12—Rotary-piston machines or engines of intermeshing engagement type, i.e. with engagement of co- operating members similar to that of toothed gearing of other than internal-axis type
- F01C1/14—Rotary-piston machines or engines 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 toothed rotary pistons
- F01C1/16—Rotary-piston machines or engines 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 toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C13/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C13/00—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby
- F01C13/04—Adaptations of machines or engines for special use; Combinations of engines with devices driven thereby for driving pumps or compressors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01C—ROTARY-PISTON OR OSCILLATING-PISTON MACHINES OR ENGINES
- F01C21/00—Component parts, details or accessories not provided for in groups F01C1/00 - F01C20/00
- F01C21/08—Rotary pistons
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F03—MACHINES OR ENGINES FOR LIQUIDS; WIND, SPRING, OR WEIGHT MOTORS; PRODUCING MECHANICAL POWER OR A REACTIVE PROPULSIVE THRUST, NOT OTHERWISE PROVIDED FOR
- F03G—SPRING, WEIGHT, INERTIA OR LIKE MOTORS; MECHANICAL-POWER PRODUCING DEVICES OR MECHANISMS, NOT OTHERWISE PROVIDED FOR OR USING ENERGY SOURCES NOT OTHERWISE PROVIDED FOR
- F03G7/00—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for
- F03G7/04—Mechanical-power-producing mechanisms, not otherwise provided for or using energy sources not otherwise provided for using pressure differences or thermal differences occurring in nature
-
- 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
- F04C18/14—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 toothed rotary pistons
- F04C18/16—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 toothed rotary pistons with helical teeth, e.g. chevron-shaped, screw type
-
- 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
- F04C29/00—Component parts, details or accessories of pumps or pumping installations, not provided for in groups F04C18/00 - F04C28/00
-
- 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
- F04C2240/20—Rotors
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/10—Geothermal energy
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The present invention discloses a kind of full stream circulation electric generating apparatus for geothermal energy, is made of the first valve (1), preprocessor (2), the second valve (3), the twin-screw expander (4) with big expansion ratio, first shaft coupling (5), second shaft coupling (6), third valve (7), negative pressure condenser (8), the 4th valve (9), water pump (10), the 5th valve (11), Twin-screw vacuum pump (12), a pair of of synchromesh gear (13), third shaft coupling (14) and generator (15)；Full stream cycle is carried out using the twin-screw expander (4) with big expansion ratio, screw rotor has the characteristics that varying pitch and taper；It is coaxially connected using the twin-screw expander (4) with big expansion ratio, Twin-screw vacuum pump (12) and generator (15)；The heat utilization rate of the present apparatus is improved, entire power generator has the advantages that compact-sized, dry type oil-free, moment variations are uniform.
Description
Technical field
The present invention relates to a kind of power generator for geothermal energy, flow double spiral shells entirely using big expansion ratio more particularly to a kind of
The power generator of bar expanding machine and Twin-screw vacuum pump.
Background technology
Geothermal energy refers to be stored at underground using rock or fluid as the heat of carrier, rich reserves, cleans low stain, is
A kind of ideal regenerative resource for power generation；Geother-mal power generation can be divided into GEOTHERMAL WATER power generation, wet geothermal steam power generation and ground
Three kinds of modes of hot dry saturated steam power generation.The geothermal energy resources in China are based on middle low form；In low enthalpy using energy source, screw expander
Have great advantage as the full mobilization force equipment of gas-liquid two-phase, be provided simultaneously with it is efficient, suitable for steam-water twin phases working medium and self-cleaning remove
The ability of dirt.
It is swollen to disclose a kind of twin-screw for low temperature exhaust heat recovery system by Chinese patent, publication No. CN206129323U
Swollen machine；The characteristics of twin-screw expander of the device is：The screw rotor uniform pitch of twin-screw expander, and position in an axial direction
The profile in each section is constant, and area utilization factor is constant, and inter-tooth volume changes not enough greatly, and expansion ratio is small.
For the thermal energy included to the greatest extent using the gas phase in geothermal energy and liquid phase, the utilization rate of thermal energy is improved,
Gas phase and liquid phase mixture are completely expanded to by gas phase using full stream cycle, the gas phase in geothermal energy can be utilized to the greatest extent
The thermal energy included with liquid phase.But realize that full stream cycle needs the expanding machine with big expansion ratio；Therefore research has big swollen
The twin-screw expander of swollen ratio, and realize that full stream cycle has great importance.
Invention content
In order to improve the heat utilization rate of geothermal energy, full stream cycle can be realized, present invention proposition is a kind of to be used for geothermal energy
Full stream circulation electric generating apparatus, full stream cycle is carried out using the twin-screw expander (4) with big expansion ratio, by gas phase and liquid phase
Mixture completely expands to gas phase；Twin-screw expander (4) with big expansion ratio is using varying pitch, the screw rotor of taper；
Water vapour is condensed to liquid water using negative pressure condenser (8)；Remain negative in negative pressure condenser (8) using Twin-screw vacuum pump
Pressure, and the fixed gas in it is extracted out；Using the twin-screw expander (4) with big expansion ratio, Twin-screw vacuum pump (12) and
Generator (15) is coaxially connected.
To achieve the above object, the present invention adopts the following technical scheme that：
A kind of full stream circulation electric generating apparatus for geothermal energy, by the first valve (1), preprocessor (2), the second valve (3), tool
There are the twin-screw expander (4) of big expansion ratio, first shaft coupling (5), second shaft coupling (6), third valve (7), negative pressure condenser
(8), the 4th valve (9), water pump (10), the 5th valve (11), Twin-screw vacuum pump (12), a pair of of synchromesh gear (13), third shaft coupling
Device (14) and generator (15) composition；The underground heat water and steam that geothermal well generates, by the first valve (1), into preprocessor
(2) after removing impurity, become saturation liquid-vapor mixture；Saturation liquid-vapor mixture enters the twin-screw expander with big expansion ratio
(4) full stream expansion is carried out in, becomes full gas phase water vapour after expansion, by having the twin-screw expander of big expansion ratio (4) outlet
It flows out into negative pressure condenser (8) and carries out isobaric condensation, be condensed into liquid water, Twin-screw vacuum pump (12) extracts negative pressure
Fixed gas in condenser (8) so that the vacuum degree that negative pressure condenser (8) is kept constant, liquid water is by water pump (10) from negative pressure
It is extracted out in condenser (8)；In the course of work, the twin-screw expander (4) with big expansion ratio drives Twin-screw vacuum pump (12)
It rotates, generates electricity together with generator (15).
A kind of full stream circulation electric generating apparatus for geothermal energy, by preprocessor (2) pretreated saturation
The gas-liquid volume ratio of liquid-vapor mixture is ranging from：90%~99.9%；Saturation liquid-vapor mixture enters double with big expansion ratio
The expansion ratio of full stream expansion is carried out in screw expander (4) ranging from：20~25；Twin-screw expander with big expansion ratio
(4) temperature range of the saturation liquid-vapor mixture of entrance is：95~100 DEG C, pressure limit is：84.56~101.13kPa；Tool
Have ranging from 25~30 DEG C of a steam temperature of twin-screw expander (4) outlet of big expansion ratio, pressure limit for 3.23~
4.24kPa；It is 20~25 DEG C by the condensed liquid water temperature range of negative pressure condenser (8), the vacuum of negative pressure condenser (8)
It spends for 3.23~4.24kPa.
A kind of full stream circulation electric generating apparatus for geothermal energy has the twin-screw expander (4) of big expansion ratio
It is made of dextrorotation conical screw rotor (401) and left-handed conical screw rotor (402), dextrorotation conical screw rotor (401) is from entering
Mouth high-pressure side gradually increases to outlet low-pressure end screw pitch, radius of addendum R1Linearly increase with axial position, root radius R3With
Axial position linearly reduces in proportion, R1+R3Numerical value is constant；Left-handed conical screw rotor (402) and dextrorotation conical screw rotor
(401) it can realize at a fully engaged；Twin-screw vacuum pump (12) is by left-hand screw rotor (1201) and right-hand screw rotor
(1202) it forms, left-hand screw rotor (1201) is gradually reduced from entrance low-pressure end to outlet high-pressure side screw pitch；Twin-screw vacuum
Pump the left-hand screw rotor (1201) of (12) and the centre-to-centre spacing A of right-hand screw rotor (1202)2With double spiral shells with big expansion ratio
The dextrorotation conical screw rotor (401) of bar expanding machine (4) and the centre-to-centre spacing A of left-handed conical screw rotor (402)1It is identical.
A kind of full stream circulation electric generating apparatus for geothermal energy has the twin-screw expander (4) of big expansion ratio
The left-hand screw rotor (1201) of dextrorotation conical screw rotor (401) and Twin-screw vacuum pump (12) pass through first shaft coupling
(5) it is connected, eccentric axial line overlaps；The left-handed conical screw rotor (402) of twin-screw expander (4) with big expansion ratio with
The right-hand screw rotor (1202) of Twin-screw vacuum pump (12) is connected by second shaft coupling (6), and eccentric axial line overlaps；Double spiral shells
The left-hand screw rotor (1201) and right-hand screw rotor (1202) of bar vacuum pump (12) are connected with a pair of of synchromesh gear (13)；It is double
The left-hand screw rotor (1201) of screw vacuum pump (12) is connected with generator (15) by third shaft coupling (14), eccentric axial
Line overlaps.
The beneficial effects of the invention are as follows：
1. a kind of full stream circulation electric generating apparatus for geothermal energy proposed realizes the full stream expansion process of vapour-liquid, most
Big degree utilizes the thermal energy in geothermal energy.
2. using the twin-screw expander (4) with big expansion ratio, exhaust end low-pressure side inter-tooth volume is maximum, and suction end is high
It presses side inter-tooth volume minimum, can realize big expansion ratio, and then improve the heat utilization rate of the present apparatus.
3. the twin-screw expander (4) with big expansion ratio, Twin-screw vacuum pump (12) and generator (15) are coaxially gone here and there
Connection, entire power generator have the advantages that compact-sized, dry type oil-free, powergenerationcycleefficiency height and smooth running.
4. with the twin-screw expander (4) of big expansion ratio and Twin-screw vacuum pump (12), there is multiple working chambers, operating
Steadily, the torque of output is uniform, while is conducive to the rotatory inertia dynamic balance of shafting rotor.
5. the low-pressure side of twin-screw expander (4) and Twin-screw vacuum pump (12) with big expansion ratio is distributed in interposition
It puts, high-pressure side is distributed in end positions, and high-low pressure is reasonably distributed so that the axial gas forces suffered by each group screw rotor are mutual
Balance, and be conducive to shaft end seal.
Description of the drawings
The present invention is further described below in conjunction with the accompanying drawings.
Fig. 1 is a kind of full stream circulation electric generating apparatus schematic diagram for geothermal energy.
Fig. 2 is the screw rotor schematic diagram of the twin-screw expander (4) with big expansion ratio.
Fig. 3 is the screw rotor schematic diagram of Twin-screw vacuum pump (12).
In figure：1-the first valve；2-preprocessor；3-the second valve；4-the twin-screw expander with big expansion ratio；
5-first shaft coupling；6-second shaft coupling；7-third valve；8-negative pressure condenser；9-the four valve；10-water pump；11-the
Five valves；12-Twin-screw vacuum pump；13-a pair of synchromesh gear；14-third shaft coupling；15-generator；401-have greatly
The dextrorotation conical screw rotor of the twin-screw expander of expansion ratio；402-have big expansion ratio twin-screw expander it is left-handed
Conical screw rotor；The left-hand screw rotor of 1201-Twin-screw vacuum pump；The right handed screw of 1202-Twin-screw vacuum pump turns
Son.
Specific embodiment
A kind of full stream circulation electric generating apparatus schematic diagram for geothermal energy as shown in Figure 1, power generator is by the first valve
(1), preprocessor (2), the second valve (3), the twin-screw expander (4) with big expansion ratio, first shaft coupling (5), second
Axis device (6), third valve (7), negative pressure condenser (8), the 4th valve (9), water pump (10), the 5th valve (11), Twin-screw vacuum pump
(12), a pair of of synchromesh gear (13), third shaft coupling (14) and generator (15) composition；Its course of work is：Geothermal well generates
Underground heat water and steam, by the first valve (1), after removing impurity into preprocessor (2), become saturation liquid-vapor mixture；
Saturation liquid-vapor mixture, which enters in the twin-screw expander (4) with big expansion ratio, carries out full stream expansion, becomes full gas after expansion
Phase water vapour carries out equipressure by having the twin-screw expander of big expansion ratio (4) outlet to flow out into negative pressure condenser (8)
Condensation, is condensed into liquid water, and Twin-screw vacuum pump (12) extracts the fixed gas in negative pressure condenser (8) so that negative pressure condenses
The vacuum degree that device (8) is kept constant, liquid water are extracted out by water pump (10) from negative pressure condenser (8)；In the course of work, have big
The twin-screw expander (4) of expansion ratio drives Twin-screw vacuum pump (12) and generator (15) to rotate together, generates electricity.
By the pretreated saturation liquid-vapor mixture of preprocessor (2) gas-liquid volume ratio ranging from：<10%；Saturation
Liquid-vapor mixture enters the expansion ratio of the full stream expansion of progress in the twin-screw expander (4) with big expansion ratio ranging from：20~
25；The temperature range of the saturation liquid-vapor mixture of twin-screw expander (4) entrance with big expansion ratio is：95~100 DEG C, pressure
Power is ranging from：84.56~101.13kPa；The steam temperature of twin-screw expander (4) outlet with big expansion ratio is ranging from
25~30 DEG C, pressure limit is 3.23~4.24kPa；It is 20 by the condensed liquid water temperature range of negative pressure condenser (8)
~25 DEG C, the vacuum degree of negative pressure condenser (8) is 3.23~4.24kPa.
What regulation screw rotor rotation direction was directed toward that high-pressure side follows right-hand rule from low-pressure side is dextrorotation, otherwise screw rod turns
Sub- rotation direction is left-handed, has the dextrorotation conical screw rotor (401) of the twin-screw expander (4) of big expansion ratio and twin-screw vacuum
The left-hand screw rotor (1201) for pumping (12) is connected by first shaft coupling (5), and eccentric axial line overlaps；With big expansion ratio
The left-handed conical screw rotor (402) of twin-screw expander (4) and the right-hand screw rotor (1202) of Twin-screw vacuum pump (12)
It is connected by second shaft coupling (6), eccentric axial line overlaps；The left-hand screw rotor (1201) of Twin-screw vacuum pump (12) and the right side
Rotation screw rotor (1202) is connected with a pair of of synchromesh gear (13)；The left-hand screw rotor (1201) of Twin-screw vacuum pump (12) with
Generator (15) is connected by third shaft coupling (14), and eccentric axial line overlaps.
The screw rotor schematic diagram of twin-screw expander (4) with big expansion ratio as shown in Figure 2 has big expansion ratio
Twin-screw expander (4) be made of dextrorotation conical screw rotor (401) and left-handed conical screw rotor (402), dextrorotation taper
Screw rotor (401) gradually increases from inlet high pressure end to outlet low-pressure end screw pitch, radius of addendum R1It is linear with axial position
Increase, root radius R3Linearly reduce in proportion with axial position, R1+R3Numerical value is constant；Left-handed conical screw rotor (402)
It can be realized with dextrorotation conical screw rotor (401) at a fully engaged.
The screw rotor schematic diagram of Twin-screw vacuum pump (12) as shown in Figure 3, Twin-screw vacuum pump (12) is by left-handed spiral shell
Bar rotor (1201) and right-hand screw rotor (1202) composition, left-hand screw rotor (1201) is from entrance low-pressure end to outlet high pressure
End screw pitch is gradually reduced；The left-hand screw rotor (1201) of Twin-screw vacuum pump (12) and the center of right-hand screw rotor (1202)
Away from A2Dextrorotation conical screw rotor (401) and left-handed conical screw rotor with the twin-screw expander (4) with big expansion ratio
(402) centre-to-centre spacing A1It is identical.
Above-mentioned, although the foregoing specific embodiments of the present invention is described with reference to the accompanying drawings, not protects model to the present invention
The limitation enclosed, those skilled in the art should understand that, based on the technical solutions of the present invention, those skilled in the art are not
Need to make the creative labor the various modifications or changes that can be made still within protection scope of the present invention.
Claims (4)
1. a kind of full stream circulation electric generating apparatus for geothermal energy by the first valve (1), preprocessor (2), the second valve (3), has
The twin-screw expander (4) of big expansion ratio, first shaft coupling (5), second shaft coupling (6), third valve (7), negative pressure condenser
(8), the 4th valve (9), water pump (10), the 5th valve (11), Twin-screw vacuum pump (12), a pair of of synchromesh gear (13), third shaft coupling
Device (14) and generator (15) composition；It is characterized in that：The underground heat water and steam that geothermal well generates by the first valve (1), enters
After preprocessor (2) removes impurity, become saturation liquid-vapor mixture；Saturation liquid-vapor mixture enters double spiral shells with big expansion ratio
Full stream expansion is carried out in bar expanding machine (4), becomes full gas phase water vapour after expansion, by having the twin-screw expander of big expansion ratio
(4) outlet, which is flowed out into negative pressure condenser (8), carries out isobaric condensation, is condensed into liquid water, Twin-screw vacuum pump (12)
Extract the fixed gas in negative pressure condenser (8) so that the vacuum degree that negative pressure condenser (8) is kept constant, liquid water is by water pump
(10) it is extracted out from negative pressure condenser (8)；In the course of work, the twin-screw expander (4) with big expansion ratio drives twin-screw
Vacuum pump (12) and generator (15) rotate together, generate electricity.
2. a kind of full stream circulation electric generating apparatus for geothermal energy as described in claim 1, it is characterized in that：By preprocessor
(2) gas-liquid volume ratio of pretreated saturation liquid-vapor mixture is ranging from：90%~99.9%；Saturation liquid-vapor mixture enters
The expansion ratio of full stream expansion is carried out in twin-screw expander (4) with big expansion ratio ranging from：20~25；With big expansion ratio
The temperature range of saturation liquid-vapor mixture of twin-screw expander (4) entrance be：95~100 DEG C, pressure limit is：84.56
~101.13kPa；Ranging from 25~30 DEG C of the steam temperature of twin-screw expander (4) outlet with big expansion ratio, pressure
Ranging from 3.23~4.24kPa；It it is 20~25 DEG C by the condensed liquid water temperature range of negative pressure condenser (8), negative pressure is cold
The vacuum degree of condenser (8) is 3.23~4.24kPa.
3. a kind of full stream circulation electric generating apparatus for geothermal energy as described in claim 1, it is characterized in that：With big expansion ratio
Twin-screw expander (4) be made of dextrorotation conical screw rotor (401) and left-handed conical screw rotor (402), dextrorotation taper
Screw rotor (401) gradually increases from inlet high pressure end to outlet low-pressure end screw pitch, radius of addendum R1It is linear with axial position
Increase, root radius R3Linearly reduce in proportion with axial position, R1+R3Numerical value is constant；Left-handed conical screw rotor (402)
It can be realized with dextrorotation conical screw rotor (401) at a fully engaged；Twin-screw vacuum pump (12) is by left-hand screw rotor (1201)
It is formed with right-hand screw rotor (1202), left-hand screw rotor (1201) gradually subtracts from entrance low-pressure end to outlet high-pressure side screw pitch
It is small；The left-hand screw rotor (1201) of Twin-screw vacuum pump (12) and the centre-to-centre spacing A of right-hand screw rotor (1202)2With with big
The dextrorotation conical screw rotor (401) of the twin-screw expander (4) of expansion ratio and the centre-to-centre spacing of left-handed conical screw rotor (402)
A1It is identical.
4. a kind of full stream circulation electric generating apparatus for geothermal energy as described in claim 1, it is characterized in that：With big expansion ratio
Twin-screw expander (4) dextrorotation conical screw rotor (401) and Twin-screw vacuum pump (12) left-hand screw rotor
(1201) it is connected by first shaft coupling (5), eccentric axial line overlaps；A left side for twin-screw expander (4) with big expansion ratio
Rotation conical screw rotor (402) and the right-hand screw rotor (1202) of Twin-screw vacuum pump (12) pass through second shaft coupling (6) phase
Even, eccentric axial line overlaps；The left-hand screw rotor (1201) and right-hand screw rotor (1202) of Twin-screw vacuum pump (12) with
A pair of of synchromesh gear (13) is connected；The left-hand screw rotor (1201) of Twin-screw vacuum pump (12) passes through third with generator (15)
Shaft coupling (14) is connected, and eccentric axial line overlaps.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113153742A (en) * | 2021-02-24 | 2021-07-23 | 西安交通大学 | Variable-line double-screw rotor and design method thereof |
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| CN108252743B (en) | 2023-10-27 |
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