CN105594367A

CN105594367A - Tail gas recovery type harvesting device

Info

Publication number: CN105594367A
Application number: CN201610189011.8A
Authority: CN
Inventors: 时建华
Original assignee: Individual
Current assignee: Pizhou Hongsheng Hydraulic Components Co Ltd
Priority date: 2016-03-30
Filing date: 2016-03-30
Publication date: 2016-05-25
Anticipated expiration: 2036-03-30
Also published as: CN105594367B

Abstract

The invention discloses a tail gas recovery type harvesting device. The tail gas recovery type harvesting device comprises a harvesting wheel, a cutting knife, a suction ventilator, a conveying pipe, a storage hopper, a scraper pan and an engine energy recovery device, wherein the harvesting wheel is arranged at the front end of the scraper pan, the cutting knife is arranged below the harvesting wheel, and the suction ventilator is arranged at the bottom of the harvesting device; crops are recycled into the scraper pan by virtue of the harvesting wheel and the cutting knife, and a negative pressure suction force is generated in the harvesting device during the operation of the suction ventilator to convey the crops in the scraper pan into the storage hopper; the harvesting device is driven through an engine, and the engine energy recovery device is used for recovering heat in tail gas of the engine. The tail gas recovery type harvesting device is simple and practical, and the convenient automatic storage and operation of the crops can be realized; furthermore, the heat of waste gas of the engine can be reutilized, so that the energy conservation and the environment protection are achieved.

Description

A kind of tail gas recycle type reaping apparatus

Technical field

The present invention relates to agriculture thing harvesting field, be specifically related to a kind of tail gas recycle type reaping apparatus.

Background technology

It is the machinery of integrated harvesting crops for harvester, completes harvesting, threshing, and grain is focused on to repository, thenBy conveyer belt, grain is being transported on transport vehicle. Also can use hand harvest, the straw of the crops such as paddy and wheat is laid in to field,And then pick up threshing with cereal harvesting machinery. Existing reaping apparatus exists that structure is too complicated, integrated degree is lower,Energy consumption higher-energy cannot secondary utilization etc. problem.

Summary of the invention

For the problems referred to above, the invention provides a kind of tail gas recycle type reaping apparatus.

Object of the present invention realizes by the following technical solutions:

A kind of tail gas recycle type reaping apparatus, is characterized in that, comprise harvesting wheel, cutter, induced-draught fan, carrier pipe, storaging bucket,Scraper bowl and engine power retracting device, described harvesting wheel is arranged on the front end of scraper bowl, and cutter are arranged on the below of harvesting wheel,Induced-draught fan is arranged on the bottom of reaping apparatus; Agriculture thing is incorporated in scraper bowl under the effect of harvesting wheel and cutter, induced-draught fan fortuneWhile turning, in reaping apparatus, forming negative-pressure sucking is transported to the agriculture material in scraper bowl in storaging bucket by carrier pipe; Described reaping apparatusBy motor driven, engine power retracting device is for reclaiming the heat of motor exhaust, it comprise radiator, engine,Backwater evaporimeter, high temperature heat-exchanging loop, low-temperature heat exchange loop, batteries, inverter and frequency converter, backpressure regulation blower fan;Described radiator is connected with engine, radiator by cooling water by the transfer of heat of engine to radiator, and by heat radiationThe surface radiating of device; The tail gas of engine drains into successively after backpressure regulation blower fan, high-temperature evaporator, cryogenic vaporizer are coolingAtmosphere;

High temperature heat-exchanging loop comprises that successively connected high temperature circulation pump, high-temperature evaporator, high temperature multistage expansion turbine and high temperature are coldCondenser, in high temperature heat-exchanging loop, mobile medium is water, high-temperature evaporator is arranged on the high-temperature tail gas pipeline after backpressure regulation blower fanUpper, to be squeezed in high-temperature evaporator by high temperature circulation pump through the WATER AS FLOW MEDIUM that high temperature condenser is cooling, the WATER AS FLOW MEDIUM after heating enters subsequentlyThe acting of high temperature multistage expansion turbine;

Low-temperature heat exchange loop comprises that successively connected low-temperature circulating pump, cryogenic vaporizer, intermediate extraction superheater, low temperature multistage are swollenSwollen machine and low-temperature condenser, in low-temperature heat exchange loop, mobile medium is R245fa, cryogenic vaporizer is arranged on through high temperature evaporationOn low temperature exhaust gas pipeline after device; The medium R245fa cooling through low-temperature condenser squeezed in cryogenic vaporizer by low-temperature circulating pump,WATER AS FLOW MEDIUM after heating enters the acting of low temperature multistage decompressor after the heating of intermediate extraction superheater; Intermediate extraction superheater is pipeFormula heat exchanger, heat source draws gas from the intergrade of high temperature multistage expansion turbine; Also comprise control valve, described control valve rootAccording to the pressure feedback in R245fa temperature feedback and high temperature multistage expansion turbine after intermediate extraction superheater, in the middle of regulatingThe flow that level is drawn gas, the intermediate extraction that is greater than or less than setting when the R245fa temperature feedback value after intermediate extraction superheater is overheatedWhen R245fa temperature value after device, automatically turn down or open the aperture of large control valve, simultaneously when in high temperature multistage expansion turbineWhen pressure feedback value is less than the pressure atresia value in the high temperature multistage expansion turbine of setting, automatic blocking control valve is opened, heatingAfter intergrade draw gas and be back to high temperature heat exchange closed circuit; Distance L between high-temperature evaporator and cryogenic vaporizer is tail gas row3/4 of feed channel overall length, high temperature multistage expansion turbine is 3 grades of decompressors, intergrade is drawn gas and is taken from the expansion of high temperature multistage turbineThe 2nd grade of machine;

High-temperature evaporator and cryogenic vaporizer all adopt screen formula-spiral heat exchange tube, adopt stagger arrangement cloth in the first half section of gas inlet one sideThe screen formula heat exchanger tube of putting, the second half section adopts spiral heat exchange tube; Described engine also arranges to the CWR road of radiatorHave backwater evaporimeter, for reclaiming the heat of engine cooling water backwater, its cooling source is taken from the centre tap of low-temperature circulating pump,Centre tap after heating R245fa out gets back to the porch of intermediate extraction superheater; Described high-temperature evaporator and low temperature steamHair device whole installation is in the heat exchange housing of drum type brake, and heat exchange housing is fastened and formed by bolt by procapsid and back casing, fore shellThe length of body is identical with the horizontal length of screen formula heat exchanger tube, and the length of back casing is identical with the horizontal length of spiral heat exchange tube; DescribedOn screen formula heat exchanger tube, be provided with multiple vibrators, vibrator is powered by batteries; The bottom of described procapsid is curved, at arcThe minimum point place of shape bottom is also provided with sewage draining exit, for regularly discharging the dirt that shakes and on screen formula heat exchanger tube;

Between low temperature multistage decompressor and high temperature multistage expansion turbine, coaxially connect by shaft coupling, in system initial start stage, lowR245fa in temperature heat-exchanging loop arrives vapourizing temperature prior to the water in high temperature heat-exchanging loop, and first low temperature multistage decompressor starts,Drive high temperature multistage expansion turbine low speed to rotate in advance by shaft coupling simultaneously, play the startup that reduces high temperature multistage expansion turbinePressure, shortens the effect of start-up time; In the time that system stops, high temperature multistage expansion turbine first coasting operation slows down, and passes through simultaneouslyShaft coupling drives low temperature multistage decompressor to slow down, and reduces low temperature multistage decompressor to reduce the idling time of cryogenic expansion machine, to playAir blast friction, prevent the effect that blade is overheated;

Also comprise batteries, inverter and frequency converter, one end of high temperature multistage expansion turbine is connected with batteries, electric power storagePond group is for storing the electric energy being come by the kinetic transformation of decompressor; Batteries is connected with inverter and frequency converter, and inverter is usedIn being alternating current by the DC inverter of battery, frequency converter is used for driving backpressure regulation blower fan and regulates its rotating speed; Backpressure regulationBlower fan, for lowering the also back pressure of control engine, feeds back to regulate backpressure regulation blower fan by the pressure at expulsion detecting when operationThereby rotating speed regulate back pressure in optimum value.

Preferably, described low temperature multistage decompressor and high temperature multistage expansion turbine are respectively by high temperature inlet valve and low temperature air inlet valveRegulate throttle flow separately, the high temperature inlet valve of employing and the stability of flow district of low temperature air inlet valve are 30%～100% metered flow,When high temperature heat-exchanging loop or low-temperature heat exchange circuit cycle flow are greater than 30% separately when metered flow, high temperature inlet valve or low temperature admissionValve keeps standard-sized sheet to avoid restriction loss, changes going out of decompressor by the rotating speed that regulates high temperature circulation pump or low-temperature circulating pumpPower; When high temperature heat-exchanging loop or low-temperature heat exchange circuit cycle flow are less than 30% separately when metered flow, keep high temperature circulation pump orThe rotating speed of low-temperature circulating pump is constant, regulates exerting oneself of decompressor by the aperture of controlling high temperature inlet valve or low temperature inlet valve.

The beneficial effect of this reaping apparatus: this reaping apparatus is simple and practical, the automatic harvesting storage operation side that can realize agriculture thingJust, and engine exhaust energy can secondary utilization, energy-conserving and environment-protective; Design the off gas energy recovery system of engine, according to notThe heat recovery demand of synthermal section and the evaporating temperature of medium and the difference of heat transfer characteristic, adopt not in high temperature section and low-temperature zoneWith circulatory mediator, thereby improved on the whole the heat exchange efficiency of system; By taking out in the middle of low-temperature circulating pump lower pressureHead leads to the backwater of backwater evaporator cools engine cooling water, can reclaim cooling water at recovery motor exhaust used heat simultaneouslyHeat, and energy-saving effect is obvious; Redesign screen formula-spiral heat exchange tube that a kind of applicable tail gas heat exchange is used, be both convenient toCleaning, has increased again heat exchange efficiency; By recovering energy for by inverter and transducer drive backpressure regulation wind partMachine, and according to the rotating speed of the feedback regulation backpressure regulation blower fan of exhaust back pressure, in realizing without driven by external power blower fanBy integrated to backpressure regulation and energy recovery, investment and space hold are greatly saved; Utilize high temperature multistage expansion turbine inIntercaste draws gas, and drawing gas in high temperature multistage expansion turbine through one section of expansion process of this part, utilizes its remaining heatAmount heats the medium R245fa entering before low temperature multistage decompressor, can ensure on the one hand effective vaporization of R245fa, the opposing partyFace can improve the mechanical efficiency in low-temperature expansion loop, avoids cold source energy, thereby improves the whole efficiency of energy recycle device;Between low temperature multistage decompressor and high temperature multistage expansion turbine, coaxially connect by shaft coupling, the initial stage starting in system, due toExhaust temperature is lower, and the R245fa in low-temperature heat exchange loop arrives vapourizing temperature, low temperature multistage prior to the water in high temperature heat-exchanging loopFirst decompressor starts, and drives high temperature multistage expansion turbine low speed to rotate in advance by shaft coupling simultaneously, can effectively reduce like thisThe starting pressure of high temperature multistage expansion turbine, shortens start-up time, and in the time that system stops, high temperature multistage expansion turbine firstCoasting operation is slowed down, and drives low temperature multistage decompressor to slow down by shaft coupling simultaneously, to reduce the idling time of cryogenic expansion machine, due toMedium temperature in stopped process in decompressor is also higher, now mainly plays the air blast friction that reduces low temperature multistage decompressor,Prevent the effect that blade is overheated; According to the consideration of inlet valve control characteristic and restriction loss under different flow rate working conditions, design onePlant the control mode that rotating speed and inlet valve combine, in reducing restriction loss, kept the stability regulating.

Brief description of the drawings

The invention will be further described to utilize accompanying drawing, but embodiment in accompanying drawing does not form any limitation of the invention, forThose of ordinary skill in the art, is not paying under the prerequisite of creative work, can also obtain the attached of other according to the following drawingsFigure.

Fig. 1 is the overall structure schematic diagram of this reaping apparatus;

Fig. 2 is the structural representation of this energy recycle device;

Fig. 3 is the side view of high-temperature evaporator and cryogenic vaporizer;

Fig. 4 is the front view of high-temperature evaporator and cryogenic vaporizer.

Reference numeral: radiator-1; Engine-2; High temperature condenser-3; Low-temperature condenser-4; High-temperature evaporator-5; Low temperature steamsHair device-6; High temperature multistage expansion turbine-7; Low temperature multistage decompressor-8; Backwater evaporimeter-9; High temperature circulation pump-10; Low temperatureCirculating pump-11; Intermediate extraction superheater-12; Batteries-13; Backpressure regulation blower fan-14; Inverter and frequency converter-15; RegulateValve-16; Screen formula heat exchanger tube-17; Spiral heat exchange tube-18; Shaft coupling-19; Procapsid-20; Back casing-21; Bolt-22; BlowdownMouth-23; Harvesting wheel-24; Cutter-25; Induced-draught fan-26; Carrier pipe-27; Storaging bucket-28; Scraper bowl-29.

Detailed description of the invention

The invention will be further described with the following Examples.

Embodiment 1:

A kind of tail gas recycle type reaping apparatus as shown in Figure 1, comprises harvesting wheel 24, cutter 25, induced-draught fan 26, carriesPipe 27, storaging bucket 28, scraper bowl 29 and engine power retracting device, described harvesting wheel 24 is arranged on the front end of scraper bowl 29,Cutter 25 are arranged on the below of harvesting wheel 24, and induced-draught fan 26 is arranged on the bottom of reaping apparatus; Agriculture thing is harvesting wheel 24 HesUnder the effect of cutter 25, be incorporated in scraper bowl 29, when induced-draught fan 26 turns round, in reaping apparatus, form negative-pressure sucking by scraper bowlAgriculture material in 29 is transported in storaging bucket 28 by carrier pipe 27; Described reaping apparatus drives by engine 2.

As shown in Figure 2, engine power retracting device is for reclaiming the energy of engine 2 tail gas, and it comprises radiator 1, sends outMotivation 2, backwater evaporimeter 9, high temperature heat-exchanging loop, low-temperature heat exchange loop, batteries 13, inverter and frequency converter 15 andBackpressure regulation blower fan 14. Radiator 1 is connected with engine 2, and radiator 1 arrives the transfer of heat of engine 2 by cooling waterOn radiator 1, and by the surface radiating of radiator 1. The tail gas of engine 2 passes through backpressure regulation blower fan 14, height successivelyTemperature evaporimeter 5, the cooling rear discharge atmosphere of cryogenic vaporizer 6.

High temperature heat-exchanging loop comprises successively connected high temperature circulation pump 10, high-temperature evaporator 5, high temperature multistage expansion turbine 7 andHigh temperature condenser 3, in high temperature heat-exchanging loop, mobile medium is water, high-temperature evaporator 5 is arranged on after backpressure regulation blower fan 14On high-temperature tail gas pipeline, squeezed in high-temperature evaporator 5 in order to cold by high temperature circulation pump 10 through the WATER AS FLOW MEDIUM that high temperature condenser 3 is coolingBut the tail gas of high-temperature tail gas section, the WATER AS FLOW MEDIUM after heating is done work through high temperature multistage expansion turbine 7 subsequently, by thermal power transfer isThe mechanical energy of high temperature multistage expansion turbine 7.

Low-temperature heat exchange loop comprises successively connected low-temperature circulating pump 11, cryogenic vaporizer 6, intermediate extraction superheater 12, low temperatureMultiple expansion engine 8 and low-temperature condenser 4, in low-temperature heat exchange loop, mobile medium is R245fa, cryogenic vaporizer 6 is arranged onOn low temperature exhaust gas pipeline after high-temperature evaporator 5 further to reclaim the heat of tail gas, through cooling Jie of low-temperature condenser 6Matter R245fa is squeezed in cryogenic vaporizer 6 by low-temperature circulating pump 11, and the WATER AS FLOW MEDIUM after heating is after intermediate extraction superheater 12Doing work through low temperature multistage decompressor 8, is the mechanical energy of low temperature multistage decompressor 8 by thermal power transfer. Inventor finds after deliberation,In energy recycle device, water is as medium and not identical as the effect of medium with R245fa, evaporation of water temperatureExceed much than the evaporating temperature of R245fa, be therefore adapted at using in the tail gas section of high temperature; And make in the tail gas section of low temperatureAs medium, be more conducive to its evaporation acting with R245fa. In addition, this under different pressure and temperature conditions by these two kindsMedium is combined with, and also can improve on the whole the heat exchange efficiency of system. Intermediate extraction superheater 12 is pipe heat exchanger, heatingThermal source draws gas from the intergrade of high temperature multistage expansion turbine 7, this part draw gas at high temperature multistage expansion turbine 7Middle through one section of expansion process, utilize its remaining heat to heat the medium R245fa entering before low temperature multistage decompressor 8, oneAspect can ensure effective vaporization of R245fa, can improve on the other hand the mechanical efficiency in low-temperature expansion loop, avoids low-temperature receiver to damageLose, thus the whole efficiency of raising energy recycle device. The concrete progression that draws gas can be according to the different operating modes in two decompressorsScope is determined. Also comprise control valve 16, control valve 16 according to the R245fa temperature feedback after intermediate extraction superheater 12 andPressure feedback in high temperature multistage expansion turbine 7, for the flow that regulates intergrade to draw gas, when after intermediate extraction superheater 12R245fa temperature feedback value while being greater than or less than the R245fa temperature value after the intermediate extraction superheater 12 of setting, automatically closeLittle or open the aperture of large control valve 16, be less than the high temperature of setting when the pressure feedback value in high temperature multistage expansion turbine 7 simultaneouslyWhen pressure atresia value in multistage expansion turbine 7, automatic blocking control valve 16 is opened greatly (forbidding that it continues out greatly), in caseStop exerting oneself of high temperature multistage expansion turbine 7 too low, R245fa temperature value and setting after the intermediate extraction superheater 12 of settingHigh temperature multistage expansion turbine 7 in pressure atresia value artificially set according to different concrete conditions method by experiment, addIntergrade after heat is drawn gas and is back to high temperature heat exchange closed circuit (not shown). In this embodiment, get high-temperature evaporator 5With distance L between cryogenic vaporizer 6 is 3/4 of exhaust pipe road overall length, high temperature multistage expansion turbine 7 be 3 grades swollenSwollen machine, intergrade is drawn gas and is taken from the 2nd grade of high temperature multistage expansion turbine.

As shown in Figure 3,4, consider after more how long impurity in tail gas uses and be not easy to clear up easy obstruction, andTake into account heat exchange efficiency, high-temperature evaporator 5 and cryogenic vaporizer 6 all adopt the new structure of screen formula-spiral heat exchange tube, at tail gasInlet side, adopt the screen formula heat exchanger tube 17 that is staggered in arrangement, most like this tail gas impurity is blocked in screen formula heat exchanger tube 17Upper, very convenient when cleaning, be staggered in arrangement the flow resistance that also can effectively reduce tail gas simultaneously; And adopt spiral heat exchange in the second half sectionPipe 18, improves heat exchange efficiency to strengthen flow perturbation. The cooling source of high temperature condenser 3 and low-temperature condenser 4 can be taken from air-conditioningCold-producing medium, also can take from other low-temperature receiver, because the after-heat of this part is few, as long as can meet heat-exchanging loopIn medium be again cooled to liquid state to prevent 11 vaporizations of high temperature circulation pump 10 and low-temperature circulating pump. Described high-temperature evaporator 5In the heat exchange housing of drum type brake, heat exchange housing passes through spiral shell by procapsid 20 and back casing 21 with cryogenic vaporizer 6 whole installationsBolt 22 fastens and forms, and the length of procapsid 20 is identical with the horizontal length of screen formula heat exchanger tube 17, the length of back casing 21 and spiral shellThe horizontal length that revolves heat exchanger tube 18 is identical; On described screen formula heat exchanger tube 17, be provided with multiple vibrator (not shown)s, rappingDevice is powered by batteries 13; The bottom of described procapsid 20 is curved, is also provided with blowdown at the minimum point place of curved bottomMouth 23, for regularly discharging the dirt that shakes and on screen formula heat exchanger tube 17.

To the CWR road of radiator 1, be also provided with backwater evaporimeter 9 at engine 2, for reclaiming engine coldBut the heat of water backwater, its cooling source is taken from the centre tap of low-temperature circulating pump 11, and the centre tap after heating is outR245fa gets back to the porch of intermediate extraction superheater 12. The centre tap of low-temperature circulating pump 11 lower pressure is led to backThe backwater of water evaporimeter cooled engine cooling water, one side can reclaim the heat of cooling water backwater well, compares on the other handSetting up separately a circulation or drawing cooling medium from the outlet of low-temperature circulating pump 11 and high temperature circulation pump 10 has better energy-conservationEffect.

Between low temperature multistage decompressor 8 and high temperature multistage expansion turbine 7, coaxially connect by shaft coupling 19, start in systemAt the initial stage, because exhaust temperature is lower, the R245fa in low-temperature heat exchange loop arrives vapourizing temperature prior to the water in high temperature heat-exchanging loop,First low temperature multistage decompressor 8 starts, and drives high temperature multistage expansion turbine 7 low speed to rotate in advance by shaft coupling 19 simultaneously, thisSample can effectively reduce the starting pressure of high temperature multistage expansion turbine 7, shortens start-up time, due to high temperature multistage turbine nowMedium temperature in decompressor 7 is very low, and the leaf of the length of blade lower temperature multiple expansion engine 8 of high temperature multistage expansion turbine 7Sheet length is little, and the air blast friction of blade is very little, almost can consider; In the time that system stops, high temperature multistage expansion turbine7 first coasting operation decelerations drive low temperature multistage decompressor 8 to slow down by shaft coupling 19, to reduce the lazy of cryogenic expansion machine 8 simultaneouslyWalk the time, because the medium temperature in decompressor in stopped process is also higher, now mainly play and reduce low temperature multistage decompressor8 air blast friction, prevents the effect that blade is overheated.

One end of high temperature multistage expansion turbine 7 is connected with batteries 13, and batteries 13 is for storing by decompressor kinetic energyThe electric energy being transformed. The technology of the electric energy that is battery by power conversion about decompressor, because prior art is very ripe,Do not repeat them here. Batteries 13 is connected with inverter and frequency converter 15, and inverter is used for the DC inverter of batteryFor alternating current, frequency converter is used for driving backpressure regulation blower fan 14 and regulates its rotating speed. The impact of energy recycle device on engine 2While being mainly the heater of engine exhaust by system, can make the exhaust back pressure of engine 2 raise, and exhaust back pressure raisePower consumption can cause engine piston that waste gas is released to cylinder time increases, and therefore backpressure regulation blower fan 14 is set can effectively lower alsoAnd the back pressure of control engine 2, when operation, feeds back to regulate the rotating speed of backpressure regulation blower fan 14 by the pressure at expulsion detectingThereby regulate back pressure in optimum value, outside simultaneously this energy that utilize batteries 13 itself drive the mode of blower fan to have not needThe advantage of the power supply coming.

Low temperature multistage decompressor 8 and high temperature multistage expansion turbine 7 are respectively by high temperature inlet valve and low temperature air inlet valve (in figure notIllustrate) regulate throttle flow separately. The high temperature inlet valve adopting and the stability of flow district of low temperature air inlet valve are 30%～100% volumeNo matter constant flow, be low-temperature heat exchange loop or high temperature heat-exchanging loop, and the control of pump and the control of decompressor, first adjust by pumpThe flow of joint working medium, realizes the control in expander inlet place temperature to working medium, and in the time that flow changes, decompressor must be madeCorresponding adjustment mated flow, if the operation of decompressor is not mated with flow, not only can not maintain stable evaporating pressure,It is stable that the operation of decompressor also cannot keep, simultaneously according to the characteristic of high temperature inlet valve and low temperature inlet valve, adopt pressure to regulate andSpeed regulates the control mode matching: when high temperature heat-exchanging loop or low-temperature heat exchange circuit cycle flow are greater than 30% specified stream separatelyWhen amount, high temperature inlet valve or low temperature inlet valve keep standard-sized sheet to avoid restriction loss, by regulating high temperature circulation pump 10 or low temperatureThe rotating speed of circulating pump 11 changes exerting oneself of decompressor; When high temperature heat-exchanging loop or low-temperature heat exchange circuit cycle flow are less than 30% eachIn the time of metered flow, the control characteristic of the inlet valve during due to low discharge is unstable, keeps high temperature circulation pump 10 or low-temperature circulating pump11 rotating speeds are constant, regulate exerting oneself of decompressor by the aperture of controlling high temperature inlet valve or low temperature inlet valve.

In the reaping apparatus of this embodiment, simple and practical, the automatic harvesting storage operation that can realize agriculture thing is convenient, and sends outEngine exhaust gas energy can secondary utilization, energy-conserving and environment-protective; Design the exhaust gas recovery system of engine, according to the heat of different temperatures sectionAmount recovery demand and the evaporating temperature of medium and the difference of heat transfer characteristic, adopt different circulatory mediators in high temperature section and low-temperature zone,Thereby improve on the whole the heat exchange efficiency of system; Steam by low-temperature circulating pump centre tap lower pressure being led to backwaterThe backwater of hair device 9 cooled engine cooling waters, can reclaim motor exhaust used heat and reclaim simultaneously the heat of cooling water, andEnergy-saving effect is obvious; Redesign screen formula-spiral heat exchange tube that a kind of applicable tail gas heat exchange is used, be both convenient to cleaning, increased againHeat exchange efficiency; By by part recover energy for driving backpressure regulation blower fan 14 by inverter and frequency converter 15, andAnd according to the rotating speed of the feedback regulation backpressure regulation blower fan 14 of exhaust back pressure, in realizing without driven by external power blower fan, will carry on the backPress adjusting and energy to reclaim integrated, greatly saved investment and space hold; Utilize the centre of high temperature multistage expansion turbine 7Level is drawn gas, and drawing gas in high temperature multistage expansion turbine 7 through one section of expansion process of this part, utilizes its remaining heatAmount heats the medium R245fa entering before low temperature multistage decompressor 8, can ensure on the one hand effective vaporization of R245fa, anotherAspect can improve the mechanical efficiency in low-temperature expansion loop, avoids cold source energy, thereby improves the whole efficiency of energy recycle device;Between low temperature multistage decompressor 8 and high temperature multistage expansion turbine 7, coaxially connect by shaft coupling 19, the initial stage starting in system,Because exhaust temperature is lower, the R245fa in low-temperature heat exchange loop arrives vapourizing temperature, low temperature prior to the water in high temperature heat-exchanging loopFirst multiple expansion engine starts, and drives high temperature multistage expansion turbine 7 low speed to rotate in advance by shaft coupling 19 simultaneously, like this canEffectively reduce the starting pressure of high temperature multistage expansion turbine 7, shorten start-up time, in the time that system stops, high temperature multistage turbineDecompressor 7 first coasting operation slows down, and drives low temperature multistage decompressor 8 to slow down, to reduce cryogenic expansion machine by shaft coupling 19 simultaneously8 idling time, because the medium temperature in decompressor in stopped process is also higher, now mainly plays and reduces low temperature multistageThe air blast friction of decompressor 8, prevents the effect that blade is overheated; According to inlet valve control characteristic and throttling under different flow rate working conditionsThe consideration of loss, has designed the control mode that a kind of rotating speed and inlet valve combine, and in reducing restriction loss, has kept tuneThe stability of joint. Distance L between high-temperature evaporator 5 and cryogenic vaporizer 6 is 3/4 of exhaust pipe road overall length, high temperatureMultistage expansion turbine 7 is 3 grades of decompressors, and intergrade is drawn gas and taken from the 2nd grade of high temperature multistage expansion turbine 7, and heat returnsThe rate of producing effects has improved 4%, has obtained beyond thought effect.

Embodiment 2:

As shown in Figure 2, engine power retracting device is for reclaiming the energy of motor exhaust, and it comprises radiator 1, startsMachine 2, backwater evaporimeter 9, high temperature heat-exchanging loop, low-temperature heat exchange loop, batteries 13, inverter and frequency converter 15 and the back of the bodyPress and regulate blower fan 14. Radiator 1 is connected with engine 2, and radiator 1 arrives the transfer of heat of engine 2 loose by cooling waterOn hot device 1, and by the surface radiating of radiator 1. The tail gas of engine 2 passes through backpressure regulation blower fan 14, high temperature successivelyEvaporimeter 5, the cooling rear discharge atmosphere of cryogenic vaporizer 6.

Low-temperature heat exchange loop comprises successively connected low-temperature circulating pump 11, cryogenic vaporizer 6, intermediate extraction superheater 12, low temperatureMultiple expansion engine 8 and low-temperature condenser 4, in low-temperature heat exchange loop, mobile medium is R245fa, cryogenic vaporizer 6 is arranged onOn low temperature exhaust gas pipeline after high-temperature evaporator 5 further to reclaim the heat of tail gas, through cooling Jie of low-temperature condenser 6Matter R245fa is squeezed in cryogenic vaporizer 6 by low-temperature circulating pump 11, and the WATER AS FLOW MEDIUM after heating is after intermediate extraction superheater 12Doing work through low temperature multistage decompressor 8, is the mechanical energy of low temperature multistage decompressor 8 by thermal power transfer. Inventor finds after deliberation,In energy recycle device, water is as medium and not identical as the effect of medium with R245fa, evaporation of water temperatureExceed much than the evaporating temperature of R245fa, be therefore adapted at using in the tail gas section of high temperature; And make in the tail gas section of low temperatureAs medium, be more conducive to its evaporation acting with R245fa. In addition, this under different pressure and temperature conditions by these two kindsMedium is combined with, and also can improve on the whole the heat exchange efficiency of system. Intermediate extraction superheater 12 is pipe heat exchanger, heatingThermal source draws gas from the intergrade of high temperature multistage expansion turbine 7, this part draw gas at high temperature multistage expansion turbine 7Middle through one section of expansion process, utilize its remaining heat to heat the medium R245fa entering before low temperature multistage decompressor 8, oneAspect can ensure effective vaporization of R245fa, can improve on the other hand the mechanical efficiency in low-temperature expansion loop, avoids low-temperature receiver to damageLose, thus the whole efficiency of raising energy recycle device. The concrete progression that draws gas can be according to the different operating modes in two decompressorsScope is determined. Also comprise control valve 16, control valve 16 according to the R245fa temperature feedback after intermediate extraction superheater 12 andPressure feedback in high temperature multistage expansion turbine 7, for the flow that regulates intergrade to draw gas, when after intermediate extraction superheater 12R245fa temperature feedback value while being greater than or less than the R245fa temperature value after the intermediate extraction superheater 12 of setting, automatically closeLittle or open the aperture of large control valve 16, be less than the high temperature of setting when the pressure feedback value in high temperature multistage expansion turbine 7 simultaneouslyWhen pressure atresia value in multistage expansion turbine 7, automatic blocking control valve 16 is opened greatly (forbidding that it continues out greatly), in caseStop exerting oneself of high temperature multistage expansion turbine 7 too low, R245fa temperature value and setting after the intermediate extraction superheater 12 of settingHigh temperature multistage expansion turbine 7 in pressure atresia value artificially set according to different concrete conditions method by experiment, addIntergrade after heat is drawn gas and is back to high temperature heat exchange closed circuit (not shown). In this embodiment, get high-temperature evaporator 5With distance L between cryogenic vaporizer 6 is 2/3 of exhaust pipe road overall length, high temperature multistage expansion turbine 7 be 4 grades swollenSwollen machine, intergrade is drawn gas and is taken from the 2nd grade of high temperature multistage expansion turbine.

In the reaping apparatus of this embodiment, simple and practical, the automatic harvesting storage operation that can realize agriculture thing is convenient, and sends outEngine exhaust gas energy can secondary utilization, energy-conserving and environment-protective; Design the exhaust gas recovery system of engine, according to the heat of different temperatures sectionAmount recovery demand and the evaporating temperature of medium and the difference of heat transfer characteristic, adopt different circulatory mediators in high temperature section and low-temperature zone,Thereby improve on the whole the heat exchange efficiency of system; Steam by low-temperature circulating pump centre tap lower pressure being led to backwaterThe backwater of hair device 9 cooled engine cooling waters, can reclaim motor exhaust used heat and reclaim simultaneously the heat of cooling water, andEnergy-saving effect is obvious; Redesign screen formula-spiral heat exchange tube that a kind of applicable tail gas heat exchange is used, be both convenient to cleaning, increased againHeat exchange efficiency; By by part recover energy for driving backpressure regulation blower fan 14 by inverter and frequency converter 15, andAnd according to the rotating speed of the feedback regulation backpressure regulation blower fan 14 of exhaust back pressure, in realizing without driven by external power blower fan, will carry on the backPress adjusting and energy to reclaim integrated, greatly saved investment and space hold; Utilize the centre of high temperature multistage expansion turbine 7Level is drawn gas, and drawing gas in high temperature multistage expansion turbine 7 through one section of expansion process of this part, utilizes its remaining heatAmount heats the medium R245fa entering before low temperature multistage decompressor 8, can ensure on the one hand effective vaporization of R245fa, anotherAspect can improve the mechanical efficiency in low-temperature expansion loop, avoids cold source energy, thereby improves the whole efficiency of energy recycle device;Between low temperature multistage decompressor 8 and high temperature multistage expansion turbine 7, coaxially connect by shaft coupling 19, the initial stage starting in system,Because exhaust temperature is lower, the R245fa in low-temperature heat exchange loop arrives vapourizing temperature, low temperature prior to the water in high temperature heat-exchanging loopFirst multiple expansion engine starts, and drives high temperature multistage expansion turbine 7 low speed to rotate in advance by shaft coupling 19 simultaneously, like this canEffectively reduce the starting pressure of high temperature multistage expansion turbine 7, shorten start-up time, in the time that system stops, high temperature multistage turbineDecompressor 7 first coasting operation slows down, and drives low temperature multistage decompressor 8 to slow down, to reduce cryogenic expansion machine by shaft coupling 19 simultaneously8 idling time, because the medium temperature in decompressor in stopped process is also higher, now mainly plays and reduces low temperature multistageThe air blast friction of decompressor 8, prevents the effect that blade is overheated; According to inlet valve control characteristic and throttling under different flow rate working conditionsThe consideration of loss, has designed the control mode that a kind of rotating speed and inlet valve combine, and in reducing restriction loss, has kept tuneThe stability of joint. Distance L between high-temperature evaporator 5 and cryogenic vaporizer 6 is 2/3 of exhaust pipe road overall length, high temperatureMultistage expansion turbine 7 is 4 grades of decompressors, and intergrade is drawn gas and taken from the 2nd grade of high temperature multistage expansion turbine 7, and heat returnsThe rate of producing effects has improved 4.5%, has obtained beyond thought effect.

Embodiment 3:

Low-temperature heat exchange loop comprises successively connected low-temperature circulating pump 11, cryogenic vaporizer 6, intermediate extraction superheater 12, low temperatureMultiple expansion engine 8 and low-temperature condenser 4, in low-temperature heat exchange loop, mobile medium is R245fa, cryogenic vaporizer 6 is arranged onOn low temperature exhaust gas pipeline after high-temperature evaporator 5 further to reclaim the heat of tail gas, through cooling Jie of low-temperature condenser 6Matter R245fa is squeezed in cryogenic vaporizer 6 by low-temperature circulating pump 11, and the WATER AS FLOW MEDIUM after heating is after intermediate extraction superheater 12Doing work through low temperature multistage decompressor 8, is the mechanical energy of low temperature multistage decompressor 8 by thermal power transfer. Inventor finds after deliberation,In energy recycle device, water is as medium and not identical as the effect of medium with R245fa, evaporation of water temperatureExceed much than the evaporating temperature of R245fa, be therefore adapted at using in the tail gas section of high temperature; And make in the tail gas section of low temperatureAs medium, be more conducive to its evaporation acting with R245fa. In addition, this under different pressure and temperature conditions by these two kindsMedium is combined with, and also can improve on the whole the heat exchange efficiency of system. Intermediate extraction superheater 12 is pipe heat exchanger, heatingThermal source draws gas from the intergrade of high temperature multistage expansion turbine 7, this part draw gas at high temperature multistage expansion turbine 7Middle through one section of expansion process, utilize its remaining heat to heat the medium R245fa entering before low temperature multistage decompressor 8, oneAspect can ensure effective vaporization of R245fa, can improve on the other hand the mechanical efficiency in low-temperature expansion loop, avoids low-temperature receiver to damageLose, thus the whole efficiency of raising energy recycle device. The concrete progression that draws gas can be according to the different operating modes in two decompressorsScope is determined. Also comprise control valve 16, control valve 16 according to the R245fa temperature feedback after intermediate extraction superheater 12 andPressure feedback in high temperature multistage expansion turbine 7, for the flow that regulates intergrade to draw gas, when after intermediate extraction superheater 12R245fa temperature feedback value while being greater than or less than the R245fa temperature value after the intermediate extraction superheater 12 of setting, automatically closeLittle or open the aperture of large control valve 16, be less than the high temperature of setting when the pressure feedback value in high temperature multistage expansion turbine 7 simultaneouslyWhen pressure atresia value in multistage expansion turbine 7, automatic blocking control valve 16 is opened greatly (forbidding that it continues out greatly), in caseStop exerting oneself of high temperature multistage expansion turbine 7 too low, R245fa temperature value and setting after the intermediate extraction superheater 12 of settingHigh temperature multistage expansion turbine 7 in pressure atresia value artificially set according to different concrete conditions method by experiment, addIntergrade after heat is drawn gas and is back to high temperature heat exchange closed circuit (not shown). In this embodiment, get high-temperature evaporator 5With distance L between cryogenic vaporizer 6 is 1/2 of exhaust pipe road overall length, high temperature multistage expansion turbine 7 be 5 grades swollenSwollen machine, intergrade is drawn gas and is taken from the 3rd level of high temperature multistage expansion turbine.

In the reaping apparatus of this embodiment, simple and practical, the automatic harvesting storage operation that can realize agriculture thing is convenient, and sends outEngine exhaust gas energy can secondary utilization, energy-conserving and environment-protective; Design the exhaust gas recovery system of engine, according to the heat of different temperatures sectionAmount recovery demand and the evaporating temperature of medium and the difference of heat transfer characteristic, adopt different circulatory mediators in high temperature section and low-temperature zone,Thereby improve on the whole the heat exchange efficiency of system; Steam by low-temperature circulating pump centre tap lower pressure being led to backwaterThe backwater of hair device 9 cooled engine cooling waters, can reclaim motor exhaust used heat and reclaim simultaneously the heat of cooling water, andEnergy-saving effect is obvious; Redesign screen formula-spiral heat exchange tube that a kind of applicable tail gas heat exchange is used, be both convenient to cleaning, increased againHeat exchange efficiency; By by part recover energy for driving backpressure regulation blower fan 14 by inverter and frequency converter 15, andAnd according to the rotating speed of the feedback regulation backpressure regulation blower fan 14 of exhaust back pressure, in realizing without driven by external power blower fan, will carry on the backPress adjusting and energy to reclaim integrated, greatly saved investment and space hold; Utilize the centre of high temperature multistage expansion turbine 7Level is drawn gas, and drawing gas in high temperature multistage expansion turbine 7 through one section of expansion process of this part, utilizes its remaining heatAmount heats the medium R245fa entering before low temperature multistage decompressor 8, can ensure on the one hand effective vaporization of R245fa, anotherAspect can improve the mechanical efficiency in low-temperature expansion loop, avoids cold source energy, thereby improves the whole efficiency of energy recycle device;Between low temperature multistage decompressor 8 and high temperature multistage expansion turbine 7, coaxially connect by shaft coupling 19, the initial stage starting in system,Because exhaust temperature is lower, the R245fa in low-temperature heat exchange loop arrives vapourizing temperature, low temperature prior to the water in high temperature heat-exchanging loopFirst multiple expansion engine starts, and drives high temperature multistage expansion turbine 7 low speed to rotate in advance by shaft coupling 19 simultaneously, like this canEffectively reduce the starting pressure of high temperature multistage expansion turbine 7, shorten start-up time, in the time that system stops, high temperature multistage turbineDecompressor 7 first coasting operation slows down, and drives low temperature multistage decompressor 8 to slow down, to reduce cryogenic expansion machine by shaft coupling 19 simultaneously8 idling time, because the medium temperature in decompressor in stopped process is also higher, now mainly plays and reduces low temperature multistageThe air blast friction of decompressor 8, prevents the effect that blade is overheated; According to inlet valve control characteristic and throttling under different flow rate working conditionsThe consideration of loss, has designed the control mode that a kind of rotating speed and inlet valve combine, and in reducing restriction loss, has kept tuneThe stability of joint. Distance L between high-temperature evaporator 5 and cryogenic vaporizer 6 is 1/2 of exhaust pipe road overall length, high temperatureMultistage expansion turbine 7 is 5 grades of decompressors, and intergrade is drawn gas and taken from the 3rd level of high temperature multistage expansion turbine 7, and heat returnsThe rate of producing effects has improved 5%, has obtained beyond thought effect.

Embodiment 4:

Low-temperature heat exchange loop comprises successively connected low-temperature circulating pump 11, cryogenic vaporizer 6, intermediate extraction superheater 12, low temperatureMultiple expansion engine 8 and low-temperature condenser 4, in low-temperature heat exchange loop, mobile medium is R245fa, cryogenic vaporizer 6 is arranged onOn low temperature exhaust gas pipeline after high-temperature evaporator 5 further to reclaim the heat of tail gas, through cooling Jie of low-temperature condenser 6Matter R245fa is squeezed in cryogenic vaporizer 6 by low-temperature circulating pump 11, and the WATER AS FLOW MEDIUM after heating is after intermediate extraction superheater 12Doing work through low temperature multistage decompressor 8, is the mechanical energy of low temperature multistage decompressor 8 by thermal power transfer. Inventor finds after deliberation,In energy recycle device, water is as medium and not identical as the effect of medium with R245fa, evaporation of water temperatureExceed much than the evaporating temperature of R245fa, be therefore adapted at using in the tail gas section of high temperature; And make in the tail gas section of low temperatureAs medium, be more conducive to its evaporation acting with R245fa. In addition, this under different pressure and temperature conditions by these two kindsMedium is combined with, and also can improve on the whole the heat exchange efficiency of system. Intermediate extraction superheater 12 is pipe heat exchanger, heatingThermal source draws gas from the intergrade of high temperature multistage expansion turbine 7, this part draw gas at high temperature multistage expansion turbine 7Middle through one section of expansion process, utilize its remaining heat to heat the medium R245fa entering before low temperature multistage decompressor 8, oneAspect can ensure effective vaporization of R245fa, can improve on the other hand the mechanical efficiency in low-temperature expansion loop, avoids low-temperature receiver to damageLose, thus the whole efficiency of raising energy recycle device. The concrete progression that draws gas can be according to the different operating modes in two decompressorsScope is determined. Also comprise control valve 16, control valve 16 according to the R245fa temperature feedback after intermediate extraction superheater 12 andPressure feedback in high temperature multistage expansion turbine 7, for the flow that regulates intergrade to draw gas, when after intermediate extraction superheater 12R245fa temperature feedback value while being greater than or less than the R245fa temperature value after the intermediate extraction superheater 12 of setting, automatically closeLittle or open the aperture of large control valve 16, be less than the high temperature of setting when the pressure feedback value in high temperature multistage expansion turbine 7 simultaneouslyWhen pressure atresia value in multistage expansion turbine 7, automatic blocking control valve 16 is opened greatly (forbidding that it continues out greatly), in caseStop exerting oneself of high temperature multistage expansion turbine 7 too low, R245fa temperature value and setting after the intermediate extraction superheater 12 of settingHigh temperature multistage expansion turbine 7 in pressure atresia value artificially set according to different concrete conditions method by experiment, addIntergrade after heat is drawn gas and is back to high temperature heat exchange closed circuit (not shown). In this embodiment, get high-temperature evaporator 5With distance L between cryogenic vaporizer 6 is 2/5 of exhaust pipe road overall length, high temperature multistage expansion turbine 7 be 5 grades swollenSwollen machine, intergrade is drawn gas and is taken from the 2nd grade of high temperature multistage expansion turbine.

In the reaping apparatus of this embodiment, simple and practical, the automatic harvesting storage operation that can realize agriculture thing is convenient, and sends outEngine exhaust gas energy can secondary utilization, energy-conserving and environment-protective; Design the exhaust gas recovery system of engine, according to the heat of different temperatures sectionAmount recovery demand and the evaporating temperature of medium and the difference of heat transfer characteristic, adopt different circulatory mediators in high temperature section and low-temperature zone,Thereby improve on the whole the heat exchange efficiency of system; Steam by low-temperature circulating pump centre tap lower pressure being led to backwaterThe backwater of hair device 9 cooled engine cooling waters, can reclaim motor exhaust used heat and reclaim simultaneously the heat of cooling water, andEnergy-saving effect is obvious; Redesign screen formula-spiral heat exchange tube that a kind of applicable tail gas heat exchange is used, be both convenient to cleaning, increased againHeat exchange efficiency; By by part recover energy for driving backpressure regulation blower fan 14 by inverter and frequency converter 15, andAnd according to the rotating speed of the feedback regulation backpressure regulation blower fan 14 of exhaust back pressure, in realizing without driven by external power blower fan, will carry on the backPress adjusting and energy to reclaim integrated, greatly saved investment and space hold; Utilize the centre of high temperature multistage expansion turbine 7Level is drawn gas, and drawing gas in high temperature multistage expansion turbine 7 through one section of expansion process of this part, utilizes its remaining heatAmount heats the medium R245fa entering before low temperature multistage decompressor 8, can ensure on the one hand effective vaporization of R245fa, anotherAspect can improve the mechanical efficiency in low-temperature expansion loop, avoids cold source energy, thereby improves the whole efficiency of energy recycle device;Between low temperature multistage decompressor 8 and high temperature multistage expansion turbine 7, coaxially connect by shaft coupling 19, the initial stage starting in system,Because exhaust temperature is lower, the R245fa in low-temperature heat exchange loop arrives vapourizing temperature, low temperature prior to the water in high temperature heat-exchanging loopFirst multiple expansion engine starts, and drives high temperature multistage expansion turbine 7 low speed to rotate in advance by shaft coupling 19 simultaneously, like this canEffectively reduce the starting pressure of high temperature multistage expansion turbine 7, shorten start-up time, in the time that system stops, high temperature multistage turbineDecompressor 7 first coasting operation slows down, and drives low temperature multistage decompressor 8 to slow down, to reduce cryogenic expansion machine by shaft coupling 19 simultaneously8 idling time, because the medium temperature in decompressor in stopped process is also higher, now mainly plays and reduces low temperature multistageThe air blast friction of decompressor 8, prevents the effect that blade is overheated; According to inlet valve control characteristic and throttling under different flow rate working conditionsThe consideration of loss, has designed the control mode that a kind of rotating speed and inlet valve combine, and in reducing restriction loss, has kept tuneThe stability of joint. Distance L between high-temperature evaporator 5 and cryogenic vaporizer 6 is 2/5 of exhaust pipe road overall length, high temperatureMultistage expansion turbine 7 is 5 grades of decompressors, and intergrade is drawn gas and taken from the 2nd grade of high temperature multistage expansion turbine 7, and heat returnsThe rate of producing effects has improved 5.5%, has obtained beyond thought effect.

Embodiment 5:

Low-temperature heat exchange loop comprises successively connected low-temperature circulating pump 11, cryogenic vaporizer 6, intermediate extraction superheater 12, low temperatureMultiple expansion engine 8 and low-temperature condenser 4, in low-temperature heat exchange loop, mobile medium is R245fa, cryogenic vaporizer 6 is arranged onOn low temperature exhaust gas pipeline after high-temperature evaporator 5 further to reclaim the heat of tail gas, through cooling Jie of low-temperature condenser 6Matter R245fa is squeezed in cryogenic vaporizer 6 by low-temperature circulating pump 11, and the WATER AS FLOW MEDIUM after heating is after intermediate extraction superheater 12Doing work through low temperature multistage decompressor 8, is the mechanical energy of low temperature multistage decompressor 8 by thermal power transfer. Inventor finds after deliberation,In energy recycle device, water is as medium and not identical as the effect of medium with R245fa, evaporation of water temperatureExceed much than the evaporating temperature of R245fa, be therefore adapted at using in the tail gas section of high temperature; And make in the tail gas section of low temperatureAs medium, be more conducive to its evaporation acting with R245fa. In addition, this under different pressure and temperature conditions by these two kindsMedium is combined with, and also can improve on the whole the heat exchange efficiency of system. Intermediate extraction superheater 12 is pipe heat exchanger, heatingThermal source draws gas from the intergrade of high temperature multistage expansion turbine 7, this part draw gas at high temperature multistage expansion turbine 7Middle through one section of expansion process, utilize its remaining heat to heat the medium R245fa entering before low temperature multistage decompressor 8, oneAspect can ensure effective vaporization of R245fa, can improve on the other hand the mechanical efficiency in low-temperature expansion loop, avoids low-temperature receiver to damageLose, thus the whole efficiency of raising energy recycle device. The concrete progression that draws gas can be according to the different operating modes in two decompressorsScope is determined. Also comprise control valve 16, control valve 16 according to the R245fa temperature feedback after intermediate extraction superheater 12 andPressure feedback in high temperature multistage expansion turbine 7, for the flow that regulates intergrade to draw gas, when after intermediate extraction superheater 12R245fa temperature feedback value while being greater than or less than the R245fa temperature value after the intermediate extraction superheater 12 of setting, automatically closeLittle or open the aperture of large control valve 16, be less than the high temperature of setting when the pressure feedback value in high temperature multistage expansion turbine 7 simultaneouslyWhen pressure atresia value in multistage expansion turbine 7, automatic blocking control valve 16 is opened greatly (forbidding that it continues out greatly), in caseStop exerting oneself of high temperature multistage expansion turbine 7 too low, R245fa temperature value and setting after the intermediate extraction superheater 12 of settingHigh temperature multistage expansion turbine 7 in pressure atresia value artificially set according to different concrete conditions method by experiment, addIntergrade after heat is drawn gas and is back to high temperature heat exchange closed circuit (not shown). In this embodiment, get high-temperature evaporator 5With distance L between cryogenic vaporizer 6 is 2/7 of exhaust pipe road overall length, high temperature multistage expansion turbine 7 be 6 grades swollenSwollen machine, intergrade is drawn gas and is taken from the 3rd level of high temperature multistage expansion turbine.

In the reaping apparatus of this embodiment, simple and practical, the automatic harvesting storage operation that can realize agriculture thing is convenient, and sends outEngine exhaust gas energy can secondary utilization, energy-conserving and environment-protective; Design the exhaust gas recovery system of engine, according to the heat of different temperatures sectionAmount recovery demand and the evaporating temperature of medium and the difference of heat transfer characteristic, adopt different circulatory mediators in high temperature section and low-temperature zone,Thereby improve on the whole the heat exchange efficiency of system; Steam by low-temperature circulating pump centre tap lower pressure being led to backwaterThe backwater of hair device 9 cooled engine cooling waters, can reclaim motor exhaust used heat and reclaim simultaneously the heat of cooling water, andEnergy-saving effect is obvious; Redesign screen formula-spiral heat exchange tube that a kind of applicable tail gas heat exchange is used, be both convenient to cleaning, increased againHeat exchange efficiency; By by part recover energy for driving backpressure regulation blower fan 14 by inverter and frequency converter 15, andAnd according to the rotating speed of the feedback regulation backpressure regulation blower fan 14 of exhaust back pressure, in realizing without driven by external power blower fan, will carry on the backPress adjusting and energy to reclaim integrated, greatly saved investment and space hold; Utilize the centre of high temperature multistage expansion turbine 7Level is drawn gas, and drawing gas in high temperature multistage expansion turbine 7 through one section of expansion process of this part, utilizes its remaining heatAmount heats the medium R245fa entering before low temperature multistage decompressor 8, can ensure on the one hand effective vaporization of R245fa, anotherAspect can improve the mechanical efficiency in low-temperature expansion loop, avoids cold source energy, thereby improves the whole efficiency of energy recycle device;Between low temperature multistage decompressor 8 and high temperature multistage expansion turbine 7, coaxially connect by shaft coupling 19, the initial stage starting in system,Because exhaust temperature is lower, the R245fa in low-temperature heat exchange loop arrives vapourizing temperature, low temperature prior to the water in high temperature heat-exchanging loopFirst multiple expansion engine starts, and drives high temperature multistage expansion turbine 7 low speed to rotate in advance by shaft coupling 19 simultaneously, like this canEffectively reduce the starting pressure of high temperature multistage expansion turbine 7, shorten start-up time, in the time that system stops, high temperature multistage turbineDecompressor 7 first coasting operation slows down, and drives low temperature multistage decompressor 8 to slow down, to reduce cryogenic expansion machine by shaft coupling 19 simultaneously8 idling time, because the medium temperature in decompressor in stopped process is also higher, now mainly plays and reduces low temperature multistageThe air blast friction of decompressor 8, prevents the effect that blade is overheated; According to inlet valve control characteristic and throttling under different flow rate working conditionsThe consideration of loss, has designed the control mode that a kind of rotating speed and inlet valve combine, and in reducing restriction loss, has kept tuneThe stability of joint. Distance L between high-temperature evaporator 5 and cryogenic vaporizer 6 is 2/7 of exhaust pipe road overall length, high temperatureMultistage expansion turbine 7 is 6 grades of decompressors, and intergrade is drawn gas and taken from the 3rd level of high temperature multistage expansion turbine 7, and heat returnsThe rate of producing effects has improved 6%, has obtained beyond thought effect.

Finally it should be noted that above embodiment is only in order to technical scheme of the present invention to be described, but not to protection domain of the present inventionRestriction, although the present invention has been done to explain with reference to preferred embodiment, those of ordinary skill in the art should be appreciated thatCan modify or be equal to replacement technical scheme of the present invention, and not depart from essence and the scope of technical solution of the present invention.

Claims

1. a tail gas recycle type reaping apparatus, is characterized in that, comprises harvesting wheel, cutter, induced-draught fan, carrier pipe, material stockBucket, scraper bowl and engine power retracting device, described harvesting wheel is arranged on the front end of scraper bowl, cutter be arranged on harvesting wheel underSide, induced-draught fan is arranged on the bottom of reaping apparatus; Agriculture thing is incorporated in scraper bowl under the effect of harvesting wheel and cutter, air draughtWhen machine running, forming negative-pressure sucking in reaping apparatus is transported to the agriculture material in scraper bowl in storaging bucket by carrier pipe; Described harvestingDevice is by motor driven, and engine power retracting device is for reclaiming the heat of motor exhaust, and it comprises radiator, sends outMotivation, backwater evaporimeter, high temperature heat-exchanging loop, low-temperature heat exchange loop, batteries, inverter and frequency converter, backpressure regulationBlower fan; Described radiator is connected with engine, radiator by cooling water by the transfer of heat of engine to radiator, and logicalCross the surface radiating of radiator; It is cooling that the tail gas of engine passes through backpressure regulation blower fan, high-temperature evaporator, cryogenic vaporizer successivelyAfter drain into atmosphere;

2. a kind of tail gas recycle type reaping apparatus according to claim 1, is characterized in that, described low temperature multistage decompressor andHigh temperature multistage expansion turbine passes through respectively high temperature inlet valve and low temperature air inlet valve regulation throttle flow separately, the high temperature admission of employingThe stability of flow district of valve and low temperature air inlet valve is 30%～100% metered flow, when high temperature heat-exchanging loop or low-temperature heat exchange circuit cycleFlow is greater than 30% separately when metered flow, and high temperature inlet valve or low temperature inlet valve keep standard-sized sheet to avoid restriction loss, by adjustingThe rotating speed of joint high temperature circulation pump or low-temperature circulating pump changes exerting oneself of decompressor; When high temperature heat-exchanging loop or low-temperature heat exchange loopCircular flow is less than 30% separately when metered flow, keeps the rotating speed of high temperature circulation pump or low-temperature circulating pump constant, high by controllingThe aperture of temperature inlet valve or low temperature inlet valve regulates exerting oneself of decompressor.