CN104110272A - Screw expander waste heat generator - Google Patents
Screw expander waste heat generator Download PDFInfo
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- CN104110272A CN104110272A CN201310131369.1A CN201310131369A CN104110272A CN 104110272 A CN104110272 A CN 104110272A CN 201310131369 A CN201310131369 A CN 201310131369A CN 104110272 A CN104110272 A CN 104110272A
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- screw expander
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Abstract
The invention discloses a screw expander waste heat generator. The system comprises a double-screw expander, which comprises a shell, a front end cover, a rear end cover, a bearing, a female screw, a male screw, a gas inlet, and a gas outlet. Two rotors are engaged with each other, a working medium suction inlet is arranged in the upper part of the shell, an outlet is arranged in the lower part of the shell, the output shaft of the expander is directly connected to a generator, high-temperature and high pressure gas working medium enters the expander through the inlet, the working medium expands and does work to push the screw to rotate, and the screw pushes the output shaft to drive the generator to generate electricity. The energy conversion from thermal energy to mechanical energy to electric energy is completed. A working medium pressurizing pump is added in the system and is directly interlinked with the screw expander, and a cooling water pump is mechanically interlinked with the generator.
Description
Technical field
The present invention relates to a kind of electricity generating device, particularly a kind of screw expander device for generating power by waste heat.
Background technique
Adopt turbine electricity generation system to reach its maturity as large high-temperature waste heat power generation equipment, but the recycling of a large amount of industrial low-temperature waste heats is still in the junior stage, the huge market demand; In metallurgy and iron and steel enterprise, only reclaim one of the flushing cinder spent hot water (80-90 DEG C) of iron and steel enterprise, every year just can bring the electric energy of 2MW to 4.5MW for each enterprise, country has the free and easy small power generation change net policy that allows at present, for China of iron and steel output the biggest in the world, exploitation low-temperature cogeneration technology, its Social benefit and economic benefit is immeasurable.Adopt two circulation Rankine cycle technology, select corresponding organic liquid working medium to absorb low temperature exhaust heat, then generate electricity by screw expander, energy-conservation and environmental protection tool is of great significance, and this class efficiency of market demand is high, and self wasted work is little, safe and reliable, the device for generating power by waste heat of low cost of manufacture.
Conventional Rankine cycle system is shown in Fig. 1 at present, mainly comprises: screw expander 1, oil transfer pump 2, deaerator 3, condenser 4, working medium suction booster 5, vaporizer 6, generator 7, condensate pump 8, cooling tower 9 in system; The cooled organic liquid working medium of condenser, after 5 superchargings of working medium suction booster, become the liquid of cryogenic high pressure, by becoming the overheated or saturated vapor of High Temperature High Pressure after vaporizer 6 heat absorption vaporizations, enter screw expander 1 step-down heat release acting, heat energy is converted into mechanical energy, lead-screw rotation, drive generator 7 to generate electricity, realize the conversion of mechanical energy to electric energy, the Working medium gas of discharging from decompressor becomes again the liquid refrigerant of low-temp low-pressure after condenser 4 is cooling, completes whole organic Rankine circulation (ORC); Condensate pump 8 sucks low temperature water from cooling tower 9, does heat exchange through condenser and cycle fluid, and the water after temperature raises is again delivered in cooling tower 9 and done the radiating and cooling that splashes; In Fig. 1, working medium suction booster 5 and condensate pump 8 all need extraneous motor to drive running in the time running well, and have increased energy consumption and the manufacture cost of system.
Summary of the invention
For the problems referred to above, increase a working medium suction booster 5-2, cancel the external motor of condensate pump 8, working medium suction booster 5-2 and condensate pump 8 change by screw expander and generator and directly drive, reduce manufacture maintenance cost, reduce energy conversion loss, improve reliability and the economic feasibility of power generation system.
Technical solution of the present invention is as shown in Figure 2:
The present invention relates to a kind of screw expander device for generating power by waste heat, in system, comprise twin-screw expander, decompressor is by housing, front and rear cover, the moon/positive screw rod, import/exhaust mouth, bearing, the compositions such as oil sealing, cloudy, sun screw rod is placed in housing by bearings, 2 roots rotors are intermeshing, working medium entrance is positioned at the top of housing, relief opening is positioned at the below of housing, the output shaft of decompressor is directly connected with generator, the working medium of steam state High Temperature High Pressure enters decompressor by import, the rotation of step-down heat radiation acting lead-screw, drive generator generating by screw rod output shaft, the transformation of energy of---mechanical energy---electric energy that completes heat energy, the working medium of discharging is cooled to after liquid state via condenser, enter circulation again.
As a preferred embodiment of the present invention, increasing a working medium suction booster 5-2 is directly linked by decompressor screw rod, before decompressor running, first start working medium suction booster 5-1, after system is normal, decompressor reaches rated speed, and when the working medium suction booster 5-2 outlet pressure that screw rod directly links reaches setting value, pressure signal is given to controller 11 by pressure transducer 10, motor automatic stop by controller controlled medium suction booster 5-1 turns round, and completes the steady switching of two working medium pumps; According to this formation, described two working medium suction boosters are for being installed in parallel, parallel running simultaneously in the time that power system capacity increases; According to this formation, on described two working medium suction booster export pipelines, one-way valve 12,13 is all housed, prevent that working medium from refluxing; According to this formation, described working medium suction booster 5-2 can, by decompressor bolt rod driving, also can link by generator shaft direct mechanical; According to this formation, when described working medium suction booster 5-2 is connected with decompressor 1, can make built-in integral type, also can be connected to decompressor housing entrance point, also can be with other form and decompressor 1 mechanical connection; According to this formation, when described working medium suction booster 5-2 is connected with screw rod, can be positive screw rod, can be also female screw; According to this formation, the Placement of described working medium suction booster 5-2 and screw rod or generator, can be that spindle nose is threaded into formula or boss embedding type connects, can be that gear transmission connects, also can be that coupling (rigid, elasticity, sprocket wheel) connects, also can be with other transmission mechanism mechanical connection; According to this formation, described working medium suction booster can adopt gear pump, can be also scraping blade pump or plunger pump or other displacement pump, between the high and low pressure chamber of pump, is provided with adjustable safe valve or fluid valve.
As a preferred embodiment of the present invention, cancel the external motor of described condensate pump 8, change by generator shaft and directly drive; Described condensate pump 8 is made up of pump case, impeller, pump shaft, bearing, seal arrangement, import and export passage and longitudinal balance pipeline; According to this formation, described condensate pump can be connected to generator end, also can directly be connected with the moon/positive screw rod; According to this formation, described condensed water pump shaft can be made and generator coaxle, also can make and screw rod (the moon/sun) rotor coaxial; According to this formation, described condensate pump can be centrifugal pump, can be also peripheral pump (single-stage or multistage); According to this formation, the Placement of described condensate pump and screw rod or generator, can be that gear transmission connects, and can be also that coupling (rigid, elasticity, sprocket wheel) connects, and can be also other transmission mechanism mechanical connection.
Effect of the present invention is: cancel the external motor of condensate pump and drive, a working medium suction booster 5-2 who increases, working medium suction booster 5-2 and condensate pump 8 are directly driven by screw expander and generator, reduce the loss that transformation of energy is brought, reduced the input of system energy consumption, in the time that system condition has particular demands, can 2 the parallel runnings simultaneously of working medium suction booster, utilize to greatest extent the thermal efficiency and improve generating efficiency, having improved the economic feasibility of whole system.
Description of the invention and application mode are illustrative, in the situation that not departing from principle of the present invention, can realize the present invention with other structure, form, material, ratio and layout.
Below be only concrete exemplary applications of the present invention, protection scope of the present invention is not constituted any limitation.All employing equivalents or equivalence are replaced and the technological scheme of formation, within all dropping on rights protection scope of the present invention.
Brief description of the drawings
Below in conjunction with accompanying drawing, technical solution of the present invention is described further:
Fig. 1 is screw expander device for generating power by waste heat schematic diagram;
Fig. 2 is for using screw expander device for generating power by waste heat schematic diagram of the present invention;
Fig. 3 is for using screw expander of the present invention to carry working medium suction booster schematic diagram;
Wherein: 1, screw expander; 2, oil transfer pump; 3, deaerator; 4, condenser; 5-1, working medium suction booster (motor driving); 5-2, working medium suction booster (decompressor driving); 6, vaporizer; 7, generator; 8, condensate pump; 9, cooling tower; 10, pressure transducer; 11, controller; 12, one way stop peturn valve; 13, one way stop peturn valve; 101, decompressor housing; 102, male rotor; 103, female rotor; 104, working medium suction booster (vane pump 5-2) pump case; 105, blade; 106, blade pump rotor; 107, safety valve; 108, spring; 109, spring seat; 110, adjusting screw; 111, locking nut; 112, blade pump stator.
Embodiment:
With reference to the accompanying drawings of mode of execution, Fig. 2 represents to have screw expander device for generating power by waste heat of the present invention, comprises screw expander 1 in system, oil transfer pump 2, deaerator 3, condenser 4, working medium suction booster (motor driving) 5-1, working medium suction booster (decompressor driving) 5-2, vaporizer 6, generator 7, condensate pump 8, cooling tower 9, pressure transducer 10, controller 11, one way stop peturn valve 12, one way stop peturn valve 13.
In this screw expander device for generating power by waste heat, condensate pump 8 is directly driven by coupling by generator 7, and working medium suction booster 5-2 and decompressor 1 rotor directly drive by coupling, manufactures maintenance cost thereby reduce, reduce energy conversion loss, improve the economic feasibility of power generation system.
As the first embodiment of the present invention, as shown in Figure 3, working medium suction booster 5-2 and decompressor manufacture one, its structure comprises. decompressor housing 101, male rotor 102, female rotor 103, working medium suction booster (vane pump) pump case 104, blade 105, blade pump rotor 106, safety valve 107, blade pump stator 112 compositions such as grade, vane pump pump shaft is coaxial with decompressor male rotor or female rotor, in the interior bias of cylinder type blade pump stator 112, blade pump rotor 106 is installed, blade pump rotor is fixedly mounted on shaft by key, on blade pump rotor, have a lot of symmetrical chutes, blade 105 is housed in groove, in the time that screw expander rotates, drive blade pump rotor to rotate together, blade is under the effect of centrifugal force, hold out against on the inwall of stator, like this, at stator, rotor, between the end face of blade, just form several seal spacies, along with the variation of each spatial volume, rotor is often revolving while going around, each working space all will complete and once sucks and discharge, reach the object of carrying to working medium supercharging continuously, in order to regulate and limit the working pressure of working medium pump, blade type working medium suction booster is provided with adjustable safety valve 107, the valve body of safety valve is the stepped piston of a cylinder type with convex shoulder, in the time that pressure exceedes limit value, safety valve spring 108 makes valve open by compression, the row of communication, suction two ends, to reach the object of pressure release, the pretightening force of safety valve spring 108 can be set adjustment by adjusting screw 111.
As the second embodiment of the present invention, as shown in Figure 2, working medium suction booster 5-2 can directly be connected with decompressor screw rod by coupling, is placed in expander inlet side.
As the first embodiment of the present invention, as shown in Figure 2, in system, be provided with two working medium suction boosters, be working medium suction booster (motor driving) 5-1 and working medium suction booster (decompressor carries integrated pump) 5-2, on the export pipeline of working medium suction booster (decompressor carries integrated pump) 5-2, pressure transducer 10 is housed, two working medium suction boosters have automatic switchover and parallel running function, at the system works initial stage, suction booster 5-1 first turns round, reach rated speed after decompressor works well time, carry working medium suction booster 5-2 and discharge working medium simultaneously, when the pressure transducer 10 of installing on working medium suction booster 5-2 export pipeline detects while meeting setup pressure value, automatically stop the motor running of working medium suction booster 5-1 by controller 11, system keeps the normal supercharging of working medium to carry by working medium suction booster 5-2, complete steady switching, when in particular cases, when power system capacity increases, can be as required two working medium suction boosters of parallel running simultaneously, to improve generated energy and generating efficiency.
As the present invention second embodiment, as shown in Figure 2, on the export pipeline of two working medium suction boosters, be equipped with one way stop peturn valve 12,13, prevent that working medium from refluxing, and ensures reliability and the Security of system.
Claims (5)
1. a screw expander device for generating power by waste heat, this device for generating power by waste heat comprises screw expander, oil transfer pump, fuel and vapor separator, condenser, two working medium suction boosters, vaporizer, generator, condensate pump; Described screw expander is to be accommodated in intermeshing combined machine in housing by negative and positive two roots rotors; Described oil transfer pump is used for providing compressor lubricant oil; Described fuel and vapor separator, is arranged on the decompressor rear end of giving vent to anger, for separating of working medium and lubricant oil; Described condenser, for condensation working medium; Described vaporizer, does heat exchange for working medium and heat source medium; Described generator, is directly driven by decompressor; Described condensate pump, provides normal temperature cooling water to condenser, for the condensation of cycle fluid.
2. a kind of screw expander device for generating power by waste heat according to claim 1, it is characterized in that: described condensate pump is directly driven by screw expander or generator, described Placement can be that spindle nose is threaded into formula or boss embedding type connects, can be that gear transmission connects, can be also that coupling (rigid, elasticity, sprocket wheel) connects or other transmission mechanism connects.
3. a kind of screw expander device for generating power by waste heat according to claim 1, it is characterized in that: described two working medium suction boosters, one is driven for system starting with before running well and is used by motor, and one is directly driven by screw expander screw axis, in the time that equipment is normally worked, uses.
4. a kind of screw expander device for generating power by waste heat according to claim 1, is characterized in that: described two working medium suction boosters, comprise the pump housing, pipe-line system, export pipeline one-way valve, pressure transducer, controller composition; Described two working medium suction boosters, for being installed in parallel, can automatically switch and control, parallel running simultaneously in the time that power system capacity increases, and working medium suction booster export pipeline is all equipped with one-way valve, prevents that working medium from refluxing.
5. a kind of screw expander device for generating power by waste heat according to claim 1, is characterized in that: described two working medium suction boosters, can adopt gear pump, and can be also scraping blade pump or plunger pump, between the high and low pressure chamber of pump, be provided with adjustable safe valve or relief valve; Described two working medium suction boosters, also can be by generator shaft mechanical linkage by decompressor bolt rod driving; While connection with screw rod, can be positive screw rod, can be also female screw; Described two working medium suction boosters can be that spindle nose is threaded into formula or boss embedding type is connected with screw rod or generator Placement, can be that gear transmission connects, also can be that coupling (rigid, elasticity, sprocket wheel) connects, also can connect in order to other transmission mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310131369.1A CN104110272A (en) | 2013-04-16 | 2013-04-16 | Screw expander waste heat generator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310131369.1A CN104110272A (en) | 2013-04-16 | 2013-04-16 | Screw expander waste heat generator |
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| CN104110272A true CN104110272A (en) | 2014-10-22 |
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| CN201310131369.1A Pending CN104110272A (en) | 2013-04-16 | 2013-04-16 | Screw expander waste heat generator |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104975895A (en) * | 2014-04-09 | 2015-10-14 | 袁建华 | Waste heat power generation device of screw expander |
| CN105240229A (en) * | 2015-11-04 | 2016-01-13 | 江西宝象科技有限公司 | Solar photothermal power generation system |
| CN105986840A (en) * | 2015-03-23 | 2016-10-05 | 株式会社神户制钢所 | Heat-collecting-type power generation system |
| CN108104879A (en) * | 2018-01-17 | 2018-06-01 | 无锡锡压压缩机有限公司 | A kind of screw expander, helical-lobe compressor, the integrated system of motor |
| CN111396291A (en) * | 2020-03-27 | 2020-07-10 | 董荣华 | Compressed gas waste heat recovery power generation system |
| CN115585027A (en) * | 2022-12-12 | 2023-01-10 | 南京天加能源科技有限公司 | Oil cooling and motor cooling coupling device based on ORC waste heat recovery turbine generator set |
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| JPH02252901A (en) * | 1989-11-24 | 1990-10-11 | Hisaka Works Ltd | Lubricating device for screw expander |
| CN2292905Y (en) * | 1996-07-08 | 1998-09-30 | 余自伟 | Waste heat electric generating apparatus |
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| CN201599071U (en) * | 2010-01-27 | 2010-10-06 | 江西佳能新能源发展有限公司 | Environment-friendly energy saving and emission reduction reaction working medium recycling system |
| CN202012456U (en) * | 2011-04-21 | 2011-10-19 | 西安华新能源工程有限公司 | Solar heating low boiling point working medium screw expanding power system |
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Patent Citations (8)
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| CN2292905Y (en) * | 1996-07-08 | 1998-09-30 | 余自伟 | Waste heat electric generating apparatus |
| CN101194084A (en) * | 2005-06-10 | 2008-06-04 | 城市大学 | Lubrication of expanders in steam power systems |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104975895A (en) * | 2014-04-09 | 2015-10-14 | 袁建华 | Waste heat power generation device of screw expander |
| CN105986840A (en) * | 2015-03-23 | 2016-10-05 | 株式会社神户制钢所 | Heat-collecting-type power generation system |
| CN105986840B (en) * | 2015-03-23 | 2019-02-15 | 株式会社神户制钢所 | Heat recovery type power generation system |
| CN105240229A (en) * | 2015-11-04 | 2016-01-13 | 江西宝象科技有限公司 | Solar photothermal power generation system |
| CN105240229B (en) * | 2015-11-04 | 2018-11-02 | 江西宝象科技有限公司 | Solar light-heat power-generation system |
| CN108104879A (en) * | 2018-01-17 | 2018-06-01 | 无锡锡压压缩机有限公司 | A kind of screw expander, helical-lobe compressor, the integrated system of motor |
| CN111396291A (en) * | 2020-03-27 | 2020-07-10 | 董荣华 | Compressed gas waste heat recovery power generation system |
| CN115585027A (en) * | 2022-12-12 | 2023-01-10 | 南京天加能源科技有限公司 | Oil cooling and motor cooling coupling device based on ORC waste heat recovery turbine generator set |
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Application publication date: 20141022 |
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