CN204268753U - The system of refrigerating gas compressor or compound compressor inlet gas - Google Patents
The system of refrigerating gas compressor or compound compressor inlet gas Download PDFInfo
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- CN204268753U CN204268753U CN201420627550.1U CN201420627550U CN204268753U CN 204268753 U CN204268753 U CN 204268753U CN 201420627550 U CN201420627550 U CN 201420627550U CN 204268753 U CN204268753 U CN 204268753U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
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- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
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Abstract
The utility model discloses the system of a kind of refrigerating gas compressor or compound compressor inlet gas, comprise high pressure evaporator, in high pressure evaporator, carry out heat exchange, thus realize the cooling to compressor outlet gas; And promoting the rotation of ORC turbine by the heat that high pressure evaporator exchanges, ORC turbine drives the motion of ORC compressor, to compress refrigerant gas; The higher pressure refrigerant gas that refrigerant gas after compression and ORC turbine exhaust mouth are discharged is after condenser condenses, liquid refrigerant is admitted to high pressure evaporator through force (forcing) pump on the one hand, low pressure evaporator is admitted to, to realize the cooling to described compressor inlet gas on the one hand through pressure-reducing valve; The liquid refrigeration device gasified in described low pressure evaporator is sent back to refrigeration compressor, thus realizes the periodic duty of cold-producing medium; Visible the utility model adopts turbogenerator to utilize waste heat after the level of compressor, and energy recovery efficiency is high.
Description
Technical field
The utility model relates to a kind of auxiliary equipment of compressor, particularly relates to the system of a kind of refrigerating gas compressor or compound compressor inlet gas.
Background technology
The power consumption of the every one-level of compressor of air or other working medium when pressure ratio is certain with import PTAT; As inlet temperature reduces by 10%, then energy consumption reduces by 10%.This is that any pneumatic design is improved, driven compressor system optimization is all difficult to realize.Conventional multistage industrial compressors level final vacuum temperature is generally about 100 DEG C, in order to the energy consumption reducing next stage generally adopts cascade EDFA system.Existing cooling system adopts ambient water that upper level delivery temperature is reduced to environment temperature, and then cooled gas enters into next stage, is further compressed.
After existing level, waste heat is generally discharged in air, not only causes energy waste, and causes thermal pollution.Adopt ORC cogeneration to be the current a kind of method utilizing ultralow temperature waste heat (waste heat supply temperature is between 90 ~ 110 DEG C), but generating efficiency is extremely low, disposable input cost high (being about 15000 yuan/kW).The electricity sent, due to instability, is difficult to be incorporated to bulk power grid, is often called as rubbish electricity.
A kind of optional method reducing compressor inlet gas temperature utilizes motor-driven refrigeration plant to realize, but because refrigeration compressor needs are at high-speed cruising, could drive compressor after needing step-up gear to be improved by the rotating speed of power frequency motor.This mode causes two problems, and one is that the mechanical gearing losses of gear-box and high gear rotate the windage loss causing lubricating oil to rotate; Two is that lubricating oil enters cold-producing medium and causes heat exchanger performance to reduce, and also needs extra equipment to carry out being separated of cold-producing medium and lubricating oil.
The another kind of method utilizing waste heat is lithium bromide absorbing type refrigeration.The COP of absorption refrigeration is very low, and under said temperature condition, COP is difficult to reach 1.0 (under ARI operating mode, the COP of centrifugal water chiller is more than 7.0).Lithium bromide belongs to salt, and heat exchanger has corrosiveness, needs to adopt expensive material, and maintenance cycle is short.The life-span of frequent Absorption Refrigerator is also shorter than compressor.
In summary it can be seen in prior art, also to there is not the method and system that can carry out effectively utilization to waste heat after the level of compressor.
Utility model content
The utility model object is to provide the system of a kind of refrigerating gas compressor or compound compressor inlet gas, it can reduce gas compressor gas inlet temperature at different levels, and the inlet temperatures at different levels of gas compressor can be reduced to the temperature of environment under low pressure under the condition not consuming extra power, significantly reduce the power consumption of compressor.
The utility model technical solution problem adopts following technical scheme: a kind of system of refrigerating gas compressor inlet gas, comprises high pressure evaporator, ORC turbine, ORC compressor, condenser, high-pressure pressure-reducing valve, low-pressure relief valve, low pressure evaporator, economizer and force (forcing) pump;
Described high pressure evaporator, low pressure evaporator and economizer include refrigerant inlet, refrigerant outlet, cooled medium inlet and cooled media outlet;
Described condenser comprises the outlet of refrigerant inlet, refrigerant outlet, cooling medium entrance and cooling medium;
The cooled medium inlet of described high pressure evaporator is connected to the exhaust outlet of described gas compressor;
The refrigerant outlet of described high pressure evaporator is connected to the air inlet of described ORC turbine;
The exhaust outlet of described ORC turbine is connected to the refrigerant inlet of described condenser;
Described ORC turbine drives described ORC compressor to rotate;
The exhaust outlet of described ORC compressor is connected to the refrigerant inlet of described condenser;
The refrigerant outlet of described condenser is connected to the entrance of described high-pressure pressure-reducing valve and the entrance of force (forcing) pump;
Described pressurization delivery side of pump is connected to the refrigerant inlet of described high pressure evaporator;
The outlet of described high-pressure pressure-reducing valve is connected to the refrigerant inlet of described economizer;
The refrigerant outlet of described economizer is connected to the entrance of described low-pressure relief valve;
The refrigerant outlet of described economizer is also connected to the air inlet of described ORC compressor;
The outlet of described low-pressure relief valve is connected to the refrigerant inlet of described low pressure evaporator;
The refrigerant outlet of described low pressure evaporator is connected to the air inlet of described ORC compressor;
The cooled media outlet of described economizer is connected to the cooled medium inlet of described low pressure evaporator;
The cooled media outlet of described low pressure evaporator is connected to the air inlet of described gas compressor.
The utility model technical solution problem also adopts following technical scheme: a kind of system cooling compound compressor inlet gas, comprises high pressure evaporator, ORC turbine, ORC compressor, condenser, high-pressure pressure-reducing valve, low-pressure relief valve, low pressure evaporator, economizer, force (forcing) pump and water cooler;
Described high pressure evaporator, low pressure evaporator and economizer include refrigerant inlet, refrigerant outlet, cooled medium inlet and cooled media outlet;
Described condenser comprises the outlet of refrigerant inlet, refrigerant outlet, cooling medium entrance and cooling medium;
Described water cooler comprises cooled medium inlet, cooled media outlet, cooling medium entrance and cooling medium outlet;
The cooled medium inlet of described high pressure evaporator is connected to the level outlet of compound compressor;
The cooled media outlet of described high pressure evaporator is connected to described water cooler and is cooled the entrance of medium;
The refrigerant outlet of described high pressure evaporator is connected to the air inlet of described ORC turbine;
The exhaust outlet of described ORC turbine is connected to the refrigerant inlet of described condenser;
Described ORC turbine drives described ORC compressor to rotate;
The exhaust outlet of described ORC compressor is connected to the refrigerant inlet of described condenser;
The refrigerant outlet of described condenser is connected to the entrance of described high-pressure pressure-reducing valve and the entrance of force (forcing) pump;
Described pressurization delivery side of pump is connected to the refrigerant inlet of described high pressure evaporator;
The outlet of described high-pressure pressure-reducing valve is connected to the refrigerant inlet of described economizer;
The refrigerant outlet of described economizer is connected to the entrance of described low-pressure relief valve;
The refrigerant outlet of described economizer is also connected to the air inlet of described ORC compressor;
The outlet of described low-pressure relief valve is connected to the refrigerant inlet of described low pressure evaporator;
The refrigerant outlet of described low pressure evaporator is connected to the air inlet of described ORC compressor;
The cooled medium inlet of described economizer is connected to the cooled media outlet of described water cooler;
The cooled media outlet of described economizer is connected to the cooled medium inlet of described low pressure evaporator;
The cooled media outlet of described low pressure evaporator is connected to the level import of the next stage of described compound compressor.
Optionally, described gas compressor is multistage gas compressors, the cooled medium inlet of described high pressure evaporator is connected to the level outlet of compound compressor, and the cooled media outlet of described low pressure evaporator is connected to the level air inlet of the upper level of described multistage gas compressors.
Optionally, described ORC compressor is twin-stage ORC refrigeration compressor, the refrigerant outlet of described economizer is connected to the second level air inlet of described twin-stage ORC refrigeration compressor, and the refrigerant outlet of described low pressure evaporator is connected to the first order air inlet of described twin-stage ORC refrigeration compressor.
Optionally, described twin-stage ORC refrigeration compressor and described ORC turbine are structure as a whole, form ORC turbine refrigerant compression all-in-one, described ORC turbine refrigerant compression all-in-one comprises intermediate, main shaft, turbine volute, one-level spiral case, secondary spiral case, turbine wheel, one stage impeller, sencond stage impeller, central dividing plate, thrust disc and seal;
The two ends of described intermediate are the reeded flange of tool, and described main shaft is arranged in described intermediate by bearing rotationally;
Described turbine volute is fixed on the left end of described intermediate, and described secondary spiral case is fixed on the right-hand member of described intermediate, and described one-level spiral case is fixed on described secondary spiral case;
Described turbine wheel is fixed on the left end of described main shaft, and is positioned at described turbine volute; Described sencond stage impeller is fixed on the right-hand member of described main shaft, and is positioned at described secondary spiral case; Described one stage impeller is fixed on the right-hand member of described main shaft, and is positioned at the right side of described sencond stage impeller, and is positioned at described one-level spiral case;
The right-hand member of described main shaft is also provided with central dividing plate, and described central dividing plate is between described one stage impeller and sencond stage impeller;
The left end of described main shaft is also arranged with thrust disc, and described thrust disc is arranged with seal, and described seal 212 is fixed on the left end of described intermediate.
The utility model has following beneficial effect: the ORC circulation of the system of described refrigerating gas compressor inlet gas comprises high pressure evaporator, be cooled medium and cold-producing medium of the high temperature that compressor higher level (for compound compressor) discharges in high pressure evaporator carries out heat exchange, cold-producing medium heats up and gasifies, and cooled medium temperature reduces; The system of described refrigerating gas compressor inlet gas can also comprise water cooler; Cooled medium from described high pressure evaporator is cooled for the second time in water cooler, and heat is walked by water-band; The kind of refrigeration cycle of the system of described refrigerating gas compressor inlet gas comprises economizer, from working medium (the i.e. cooled medium of the gas compressor of water cooler in economizer, can be air) carry out heat exchange with cold-producing medium, cold-producing medium heats up and gasifies, and cooled medium is cooled for the third time; The kind of refrigeration cycle of the system of described refrigerating gas compressor inlet gas also comprises low pressure evaporator, heat exchange is carried out from the cooled medium of economizer and cold-producing medium in low pressure evaporator, cold-producing medium heats up and gasifies, cooled medium is by the 4th cooling, turn back to compound compressor subsequently, by continuation compression; The ORC circulation of the system of described refrigerating gas compressor inlet gas also comprises ORC turbine, and the high temperature liquid refrigerant from described high pressure evaporator expands in ORC turbine, drives described ORC turbine to rotate; The kind of refrigeration cycle of the system of described refrigerating gas compressor inlet gas also comprises twin-stage ORC refrigeration compressor, compresses gaseous refrigerant; The gaseous refrigerant that gaseous refrigerant after compression and ORC turbine exhaust mouth are discharged is admitted to condenser, and the liquid refrigerant part after condensation is admitted to high pressure evaporator through force (forcing) pump, and remainder is admitted to economizer through pressure-reducing valve; Some liquid refrigerant endothermic gasification in described economizer, is sucked by the second level of twin-stage ORC refrigeration compressor with entering together with gaseous refrigerant that pressure-reducing valve produces; In economizer, all the other liquid refrigerants are by entering low pressure evaporator after pressure-reducing valve; In described low pressure evaporator, liquid refrigerant endothermic gasification is sucked by twin-stage ORC refrigeration compressor, thus realizes the periodic duty of cold-producing medium; Visible the utility model adopts ORC turbine to utilize waste heat after the level of gas compressor, compared with traditional lithium bromide refrigerating, gas compressor Exhaust Gas can be reduced to lower temperature.
Accompanying drawing explanation
Fig. 1 is the structural representation of the system of refrigerating gas compressor inlet gas of the present utility model;
Fig. 2 is the structural representation of the system of cooling multistage gas compressors inlet gas of the present utility model;
Fig. 3 is the structural representation of ORC turbine refrigerant compression all-in-one of the present utility model.
In figure, mark is illustrated as: 101-high pressure evaporator; 102-ORC turbine; 103-ORC compressor; 104-condenser; 105-high-pressure pressure-reducing valve; 106-low-pressure relief valve; 107-low pressure evaporator; 108-economizer; 109-force (forcing) pump; 111-water cooler; 201-intermediate; 202-main shaft; 203-turbine volute; 204-one-level spiral case; 205-secondary spiral case; 206-turbine wheel; 207-one stage impeller; 208-sencond stage impeller; 209-central dividing plate; 210-axle sleeve; 211-thrust disc; 212-seal; 213-locknut.
Detailed description of the invention
Below in conjunction with embodiment and accompanying drawing, the technical solution of the utility model is further elaborated." → " shown in figure represents the gas (cooled medium) entering described gas compressor and discharge, and circulate circuit,
represent cold-producing medium circulation circuit;
represent the heat be discharged in environment.
Embodiment 1
With reference to figure 1, present embodiments provide a kind of system of refrigerating gas compressor inlet gas, comprise high pressure evaporator 101, ORC turbine 102, ORC compressor 103, condenser 104, high-pressure pressure-reducing valve 105, low-pressure relief valve 106, low pressure evaporator 107, economizer 108 and force (forcing) pump 109; Described high pressure and the low pressure meaning refer to by the fluid pressure of described evaporimeter or pressure-reducing valve inside or distinguish technical term;
Described high pressure evaporator 101, low pressure evaporator 107 and economizer 108 include refrigerant inlet, refrigerant outlet, cooled medium inlet and cooled media outlet; Described cooled medium is the working medium of described gas compressor, can be air or other gas;
Described condenser 104 comprises the outlet of refrigerant inlet, refrigerant outlet, cooling medium entrance and cooling medium; Described cooling medium can be ambient water, to pass through described condenser 104 by heat dissipation in environment;
The cooled medium inlet of described high pressure evaporator 101 is connected to the exhaust outlet of described gas compressor; When described gas compressor is single-stage gas compressors, the cooled medium inlet of described high pressure evaporator 101 is connected to the exhaust outlet of described single-stage gas compressors; When described gas compressor is multistage gas compressors, described multistage gas compressors has multiple grades of outlets, and one of them grade of outlet is connected to the cooled medium inlet of described high pressure evaporator 101;
The cooled media outlet of described high pressure evaporator 101 is as the exhaust outlet of described gas compressor; Namely the cooled media outlet of described high pressure evaporator discharges by the gases at high pressure after compressing;
The refrigerant outlet of described high pressure evaporator 101 is connected to the air inlet of described ORC turbine 102;
The exhaust outlet of described ORC turbine 102 is connected to the refrigerant inlet of described condenser 104;
Described ORC turbine 102 drives described ORC compressor 103 to rotate;
The exhaust outlet of described ORC compressor 103 is connected to the refrigerant inlet of described condenser 104; Namely, after the cold-producing medium with pressure that the exhaust outlet of the exhaust outlet of described ORC compressor 103 cold-producing medium with pressure of discharging and described ORC turbine 102 is discharged converges, the refrigerant inlet of described condenser 104 is inputed to;
The refrigerant outlet of described condenser 104 is connected to the entrance of described high-pressure pressure-reducing valve 105 and the entrance of force (forcing) pump 109;
The outlet of described force (forcing) pump 109 is connected to the refrigerant inlet of described high pressure evaporator 101;
The outlet of described high-pressure pressure-reducing valve 105 is connected to the refrigerant inlet of described economizer 108;
The refrigerant outlet of described economizer 108 is connected to the entrance of described low-pressure relief valve 106;
The refrigerant outlet of described economizer 108 is also connected to the air inlet of described ORC compressor 103; Preferably, described ORC compressor 103 is twin-stage ORC refrigeration compressor, and the refrigerant outlet of described economizer is also connected to the second level air inlet of described twin-stage ORC refrigeration compressor;
The outlet of described low-pressure relief valve 106 is connected to the refrigerant inlet of described low pressure evaporator 107;
The refrigerant outlet of described low pressure evaporator 107 is connected to the air inlet of described ORC compressor 103, described ORC compressor 103 can be twin-stage ORC refrigeration compressor, and the refrigerant outlet of described low pressure evaporator 107 is connected to the air inlet (air inlet of the first order) of described twin-stage ORC refrigeration compressor;
The cooled medium inlet of described economizer 108 is as the gas suction inlet of described gas compressor;
The cooled media outlet of described economizer 108 is connected to the cooled medium inlet of described low pressure evaporator 107;
The cooled media outlet of described low pressure evaporator 107 is connected to the air inlet of described gas compressor, when described gas compressor is single-stage gas compressors, the cooled media outlet of described low pressure evaporator 107 is connected to the air inlet of described single-stage gas compressors; When described gas compressor is multistage gas compressors, the cooled media outlet of described low pressure evaporator 107 is connected to the level air inlet of the upper level of described multistage gas compressors (exhaust stage relative to described multistage gas compressors).
The problem of the low pressure evaporator inefficiency that the refrigerant pressure that the refrigerant outlet being greater than described low pressure evaporator for the pressure solving the cold-producing medium of discharging due to the refrigerant outlet of described economizer is discharged brings, in the present embodiment, described ORC compressor 103 is twin-stage ORC refrigeration compressor, it comprises first order air inlet and second level air inlet, the refrigerant outlet of described economizer 108 is connected to the second level air inlet of described twin-stage ORC refrigeration compressor, the refrigerant outlet of described low pressure evaporator 107 is connected to the first order air inlet of described twin-stage ORC refrigeration compressor, adopt this connected mode, after the refrigerant gas that described low pressure evaporator 107 is discharged being compressed by the first order of described twin-stage ORC refrigeration compressor, the refrigerant gas of discharging with the refrigerant outlet of described economizer 108 converges, the second level inputing to described twin-stage ORC refrigeration compressor is compressed further, improve the operating efficiency of described low pressure evaporator, and also improve the operating efficiency of described twin-stage ORC refrigeration compressor.
In the present embodiment, for multistage gas compressors, the interstage cooler between they are at different levels can adopt the system of embodiment 2.
Embodiment 2
With reference to figure 2, present embodiments provide a kind of system cooling multistage gas compressors inlet gas, comprise high pressure evaporator 101, ORC turbine 102, ORC compressor 103, condenser 104, high-pressure pressure-reducing valve 105, low-pressure relief valve 106, low pressure evaporator 107, economizer 108, force (forcing) pump 109 and water cooler 111;
Described high pressure evaporator 101, low pressure evaporator 107 and economizer 108 include refrigerant inlet, refrigerant outlet, cooled medium inlet and cooled media outlet;
Described condenser 104 comprises the outlet of refrigerant inlet, refrigerant outlet, cooling medium entrance and cooling medium;
Described water cooler 111 comprises cooled medium inlet, cooled media outlet, cooling medium entrance and cooling medium outlet;
The cooled medium inlet of described high pressure evaporator 101 is connected to the level outlet of multistage gas compressors;
The cooled media outlet of described high pressure evaporator 101 is connected to described water cooler 111 and is cooled the entrance of medium;
The refrigerant outlet of described high pressure evaporator 101 is connected to the air inlet of described ORC turbine 102;
The exhaust outlet of described ORC turbine 102 is connected to the refrigerant inlet of described condenser 104;
Described ORC turbine 102 drives described ORC compressor 103 to rotate;
The exhaust outlet of described ORC compressor 103 is connected to the refrigerant inlet of described condenser 104;
The refrigerant outlet of described condenser 104 is connected to the entrance of described high-pressure pressure-reducing valve 105 and the entrance of force (forcing) pump 109;
The outlet of described force (forcing) pump 109 is connected to the refrigerant inlet of described high pressure evaporator 101;
The outlet of described high-pressure pressure-reducing valve 105 is connected to the refrigerant inlet of described economizer 108;
The refrigerant outlet of described economizer 108 is connected to the entrance of described low-pressure relief valve 106;
The refrigerant outlet of described economizer 108 is also connected to the air inlet of described ORC compressor 103;
The outlet of described low-pressure relief valve 106 is connected to the refrigerant inlet of described low pressure evaporator 107;
The refrigerant outlet of described low pressure evaporator 107 is connected to the air inlet of described ORC compressor 103;
The cooled medium inlet of described economizer 108 is connected to the cooled media outlet of described water cooler 111;
The cooled media outlet of described economizer 108 is connected to the cooled medium inlet of described low pressure evaporator 107;
The cooled media outlet of described low pressure evaporator 107 is connected to the level import of the next stage of described compound compressor.
In the present embodiment, described ORC compressor 103 is twin-stage ORC refrigeration compressor, the refrigerant outlet of described economizer 108 is connected to the second level air inlet of described twin-stage ORC refrigeration compressor, and the refrigerant outlet of described low pressure evaporator 107 is connected to the first order air inlet of described twin-stage ORC refrigeration compressor.
In the present embodiment, the inlet gas of the first order of described multistage gas compressors can adopt the system of refrigerating gas compressor inlet gas as described in Example 1 to cool.
Embodiment 3
With reference to figure 3, present embodiments provide a kind of ORC turbine refrigerant compression all-in-one, comprise intermediate 201, main shaft 202, turbine volute 203, one-level spiral case 204, secondary spiral case 205, turbine wheel 206, one stage impeller 207, sencond stage impeller 208, central dividing plate 209, axle sleeve 210, thrust disc 211, seal 212 and locknut 213;
The two ends of described intermediate 201 are the reeded flange of tool, described intermediate 201 offers through hole, the axis of described through hole and the dead in line of described intermediate 201, described main shaft 202 is arranged in the through hole of described intermediate 201 by bearing rotationally;
Described turbine volute 203 is fixed on the left end of described intermediate 201, and described secondary spiral case 205 is fixed on the right-hand member of described intermediate 201, and described one-level spiral case 204 is fixed on described secondary spiral case 205; Described one-level spiral case 204 is communicated with described secondary spiral case 205, and described one-level spiral case 204 comprises air inlet and exhaust outlet, and its exhaust outlet is communicated in the air inlet of described secondary spiral case 205; Described secondary spiral case 205 comprises air inlet and exhaust outlet;
Described turbine wheel 206 is fixed on the left end of described main shaft 202, and is positioned at described turbine volute 203; Described sencond stage impeller 208 is fixed on the right-hand member of described main shaft 202, and is positioned at described secondary spiral case 205; Described one stage impeller 207 is fixed on the right-hand member of described main shaft 202, and is positioned at the right side of described sencond stage impeller 208, and is positioned at described one-level spiral case 204; Described turbine wheel 206 drives described main shaft 202 to rotate, and described main shaft 202 drives described sencond stage impeller 208 and one stage impeller 207 to rotate;
The right-hand member of described main shaft 202 is also provided with central dividing plate 209, described central dividing plate 209 between described one stage impeller 207 and sencond stage impeller 208, described central dividing plate 209 and described one stage impeller 207 and sencond stage impeller 208 synchronous axial system; In the present embodiment, preferably, described central dividing plate 209 is arranged on described main shaft 202 by axle sleeve 210;
The left end of described main shaft 202 is also arranged with thrust disc 211, and described thrust disc 211 is arranged with seal 212, and described seal 212 is fixed on the left end of described intermediate 201;
Described intermediate 201 offers multiple blow vent, and described bearing is air-bearing, can to described air-bearing air feed by described blow vent;
The two ends, left and right of described main shaft 201 are respectively arranged with locknut 213, described turbine wheel 206 to be fixed on the left end of described main shaft 202, and described one stage impeller 207 and sencond stage impeller 208 are fixed on the right-hand member of described main shaft 202.
In the present embodiment, preferably, described seal 212 is arranged in the groove of described intermediate 201.
Embodiment 4
Present embodiments provide a kind of method of refrigerating gas compressor inlet gas, comprising:
S10, the gas compressor gas of discharging is discharged after high pressure evaporator cooling, and its heat discharged by high pressure evaporator is for heating and cooling agent liquid, and described refrigerant liquid gasifies in described high pressure evaporator, forms refrigerant gas;
S20, described refrigerant gas drive ORC turbine to rotate, and described ORC turbine drives twin-stage ORC refrigeration compressor to rotate; And the refrigerant gas that described ORC turbine is discharged is delivered to condenser;
S30, described refrigerant gas become refrigerant liquid after described condenser condenses, and a described refrigerant liquid part is delivered to high pressure evaporator by force (forcing) pump, and a part is delivered to economizer by high-pressure pressure-reducing valve;
S40, described economizer cool the gas entering described gas compressor, and its refrigerant gas of discharging is transported to the second level of twin-stage ORC refrigeration compressor, after the compression of the second level of described twin-stage ORC refrigeration compressor, be delivered to described condenser; Remaining refrigerant liquid is delivered to described low pressure evaporator through low-pressure relief valve;
S50, described low pressure evaporator cool the gas entering described gas compressor that described economizer is discharged, and the gas entering described gas compressor is delivered to described gas compressor;
The refrigerant gas that S60, described low pressure evaporator are discharged is delivered to the first order of twin-stage ORC refrigeration compressor, and after described twin-stage ORC refrigeration compressor compression, is delivered to described condenser.
Embodiment 5
Present embodiments provide a kind of method cooling multistage gas compressors inlet gas, comprising:
The gas that S10, the described multistage gas compressors corresponding levels are discharged, after high pressure evaporator cooling, is delivered to described water cooler, and by after described water cooler cooling, is delivered to economizer; And the heat that the described multistage gas compressors gas of discharging discharges through high pressure evaporator is for heating and cooling agent liquid, described refrigerant liquid gasifies in described high pressure evaporator, forms refrigerant gas;
S20, described refrigerant gas drive ORC turbine to rotate, and described ORC turbine drives twin-stage ORC refrigeration compressor to rotate; The refrigerant gas that described ORC turbine is discharged is delivered to condenser;
S30, described refrigerant gas become refrigerant liquid after described condenser condenses, and a described refrigerant liquid part is delivered to high pressure evaporator by force (forcing) pump, and a part is delivered to economizer by high-pressure pressure-reducing valve;
S40, described economizer cool through the cooled gas of water cooler further in S10 step, and its refrigerant gas of discharging is transported to the second level of twin-stage ORC refrigeration compressor, after the compression of the second level of described twin-stage ORC refrigeration compressor, be delivered to described condenser; Remaining refrigerant liquid is delivered to described low pressure evaporator through low-pressure relief valve;
S50, described low pressure evaporator cool the gas entering described multistage gas compressors that described economizer is discharged, and the gas entering described multistage gas compressors is delivered to the next stage of described multistage gas compressors;
The refrigerant gas that S60, described low pressure evaporator are discharged is delivered to the first order of twin-stage ORC refrigeration compressor, and after described twin-stage ORC refrigeration compressor compression, is delivered to described condenser.
See Fig. 1-3, general principle of the present utility model is: after utilizing gas compressor (can be multistage gas compressors) level, waste heat reduces the gas inlet temperature of level.Be directed to multistage gas compressors, its every one-level can be used alone oneself cooling system, also can share a cooling system.After the level of gas compressor, hot-air progressively cools in four heat exchangers (high pressure evaporator, water cooler, economizer and low pressure evaporator).Hot-air after gas compressor level heats and refrigerant liquid is gasified in high pressure evaporator, the refrigerant gas of HTHP expands and produces mechanical power in ORC turbine, then the cooled liquefaction of condenser is entered, refrigerant liquid is pressurized is pumped back to high pressure evaporator, completes a Rankine cycle.Because working media is macromolecule organic media, this process is also referred to as organic Rankine bottoming cycle (Organic Rankine Cycle).The mechanical power that ORC turbine produces drives ORC compressor, gaseous refrigerant in low pressure evaporator sucks by it, send into condenser after compression cool and liquefy, refrigerant liquid reduce pressure after pressure-reducing valve formed gas liquid mixture enter low pressure evaporator, refrigerant liquid absorbs the heat of the inlet gas entering gas compressor and gasifies in low pressure evaporator, completes kind of refrigeration cycle.Therefore, in ORC circulation, the heat of gas compressor exit gas is absorbed and used and cools, and in kind of refrigeration cycle, compressor outlet gas is further cooled, and temperature drops to the temperature lower than atmospheric environment.
See Fig. 3, same main shaft shared by ORC turbine refrigerant compression all-in-one of the present utility model, and the torque transfer produced by ORC turbine, on twin-stage ORC refrigeration compressor, achieves the dynamic equilibrium of system automatically.Concrete equilibrium process is described below:
1., when gas compressor has just started or pressure ratio is lower, level final vacuum temperature is lower.Force (forcing) pump low cruise, makes high pressure evaporator be in lower saturation pressure, and some liquid refrigerant gasifies, and ORC turbine starts to rotate.
2.ORC turbine drives twin-stage ORC refrigeration compressor to start low speed rotation, gaseous refrigerant in low pressure evaporator is drawn in refrigeration compressor by twin-stage ORC refrigeration compressor, cause the reduction of saturation pressure in low pressure evaporator and temperature, more refrigerant liquid is vaporized, and the gas inlet temperature of gas compressor is lowered simultaneously.
3. when gas compressor enters into normal operating conditions, level final vacuum temperature improves, and force (forcing) pump speed-raising enters normal operating condition.High pressure evaporator saturation pressure and temperature improve, and ORC turbine accelerates to produce more merit, and twin-stage ORC refrigeration compressor produces more refrigerating capacity, and the gas inlet temperature of gas compressor is by a step-down is low to the greatest extent.
4. the force (forcing) pump of the present embodiment carries out rotating speed control by the height of the liquid level of the refrigerant liquid in high pressure evaporator; Be specially: the rotating speed of described force (forcing) pump makes the highly stable of the liquid level of the refrigerant liquid in described high pressure evaporator, i.e. the amount of the liquid refrigerant of its pumping is identical with the amount of the liquid refrigerant that described high pressure evaporator evaporates.
Direct effect of the present utility model is that the gas inlet temperature of gas compressor is reduced to temperature lower than environment (kind of refrigeration cycle), and gas inlet temperature can only be dropped to environment temperature at most by existing water cooling system.Assuming that compressor stage final vacuum temperature is 110 DEG C, temperature after water cooler is 35 DEG C, as adopted R134a as cold-producing medium, be all 85% at ORC turbine and twin-stage ORC refrigerant compression engine efficiency, when high pressure and low pressure evaporator are all 5 DEG C close to temperature, if gas compressor gas inlet temperature is 25 DEG C (first order), then the utility model can be reduced to 12 DEG C gas inlet temperature, interstage cooler of the present utility model can drop to 16 DEG C gas temperature, therefore, the power consumption of compound compressor can decrease beyond 5%.
Indirect effect of the present utility model is a simplified the design of large centrifugal gas compressor.The key factor of decision centrifugal gas compressor size is import volume flow, and flow is larger, and impeller inlet diameter is larger.Due to the restriction of impeller material intensity, higher limit can not be exceeded at certain rotating speed lower inlet diameter.Due to this restriction, the first order of large centrifugal gas compressor has to adopt higher specific speed design and sacrifice performance.After adopting the utility model, the reduction of gas inlet temperature causes the minimizing of import volume flow, thus reduces specific speed, improves the performance of air compressor.
The sequencing of above embodiment, only for ease of describing, does not represent the quality of embodiment.
Last it is noted that above embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (7)
1. a system for refrigerating gas compressor inlet gas, is characterized in that, comprises high pressure evaporator, ORC turbine, ORC compressor, condenser, high-pressure pressure-reducing valve, low-pressure relief valve, low pressure evaporator, economizer and force (forcing) pump;
Described high pressure evaporator, low pressure evaporator and economizer include refrigerant inlet, refrigerant outlet, cooled medium inlet and cooled media outlet;
Described condenser comprises the outlet of refrigerant inlet, refrigerant outlet, cooling medium entrance and cooling medium;
The cooled medium inlet of described high pressure evaporator is connected to the exhaust outlet of described gas compressor;
The refrigerant outlet of described high pressure evaporator is connected to the air inlet of described ORC turbine;
The exhaust outlet of described ORC turbine is connected to the refrigerant inlet of described condenser;
Described ORC turbine drives described ORC compressor to rotate;
The exhaust outlet of described ORC compressor is connected to the refrigerant inlet of described condenser;
The refrigerant outlet of described condenser is connected to the entrance of described high-pressure pressure-reducing valve and the entrance of force (forcing) pump;
Described pressurization delivery side of pump is connected to the refrigerant inlet of described high pressure evaporator;
The outlet of described high-pressure pressure-reducing valve is connected to the refrigerant inlet of described economizer;
The refrigerant outlet of described economizer is connected to the entrance of described low-pressure relief valve;
The refrigerant outlet of described economizer is also connected to the air inlet of described ORC compressor;
The outlet of described low-pressure relief valve is connected to the refrigerant inlet of described low pressure evaporator;
The refrigerant outlet of described low pressure evaporator is connected to the air inlet of described ORC compressor;
The cooled media outlet of described economizer is connected to the cooled medium inlet of described low pressure evaporator;
The cooled media outlet of described low pressure evaporator is connected to the air inlet of described gas compressor.
2. the system of refrigerating gas compressor inlet gas according to claim 1, it is characterized in that, described gas compressor is multistage gas compressors, the cooled medium inlet of described high pressure evaporator is connected to the level outlet of compound compressor, and the cooled media outlet of described low pressure evaporator is connected to the level air inlet of the upper level of described multistage gas compressors.
3. the system of refrigerating gas compressor inlet gas according to claim 2, it is characterized in that, described ORC compressor is twin-stage ORC refrigeration compressor, the refrigerant outlet of described economizer is connected to the second level air inlet of described twin-stage ORC refrigeration compressor, and the refrigerant outlet of described low pressure evaporator is connected to the first order air inlet of described twin-stage ORC refrigeration compressor.
4. the system of refrigerating gas compressor inlet gas according to claim 3, it is characterized in that, described twin-stage ORC refrigeration compressor and described ORC turbine are structure as a whole, form ORC turbine refrigerant compression all-in-one, described ORC turbine refrigerant compression all-in-one comprises intermediate, main shaft, turbine volute, one-level spiral case, secondary spiral case, turbine wheel, one stage impeller, sencond stage impeller, central dividing plate, thrust disc and seal;
The two ends of described intermediate are the reeded flange of tool, and described main shaft is arranged in described intermediate by bearing rotationally;
Described turbine volute is fixed on the left end of described intermediate, and described secondary spiral case is fixed on the right-hand member of described intermediate, and described one-level spiral case is fixed on described secondary spiral case;
Described turbine wheel is fixed on the left end of described main shaft, and is positioned at described turbine volute; Described sencond stage impeller is fixed on the right-hand member of described main shaft, and is positioned at described secondary spiral case; Described one stage impeller is fixed on the right-hand member of described main shaft, and is positioned at the right side of described sencond stage impeller, and is positioned at described one-level spiral case;
The right-hand member of described main shaft is also provided with central dividing plate, and described central dividing plate is between described one stage impeller and sencond stage impeller;
The left end of described main shaft is also arranged with thrust disc, and described thrust disc is arranged with seal, and described seal is fixed on the left end of described intermediate.
5. cool a system for compound compressor inlet gas, it is characterized in that, comprise high pressure evaporator, ORC turbine, ORC compressor, condenser, high-pressure pressure-reducing valve, low-pressure relief valve, low pressure evaporator, economizer, force (forcing) pump and water cooler;
Described high pressure evaporator, low pressure evaporator and economizer include refrigerant inlet, refrigerant outlet, cooled medium inlet and cooled media outlet;
Described condenser comprises the outlet of refrigerant inlet, refrigerant outlet, cooling medium entrance and cooling medium;
Described water cooler comprises cooled medium inlet, cooled media outlet, cooling medium entrance and cooling medium outlet;
The cooled medium inlet of described high pressure evaporator is connected to the level outlet of compound compressor;
The cooled media outlet of described high pressure evaporator is connected to described water cooler and is cooled the entrance of medium;
The refrigerant outlet of described high pressure evaporator is connected to the air inlet of described ORC turbine;
The exhaust outlet of described ORC turbine is connected to the refrigerant inlet of described condenser;
Described ORC turbine drives described ORC compressor to rotate;
The exhaust outlet of described ORC compressor is connected to the refrigerant inlet of described condenser;
The refrigerant outlet of described condenser is connected to the entrance of described high-pressure pressure-reducing valve and the entrance of force (forcing) pump;
Described pressurization delivery side of pump is connected to the refrigerant inlet of described high pressure evaporator;
The outlet of described high-pressure pressure-reducing valve is connected to the refrigerant inlet of described economizer;
The refrigerant outlet of described economizer is connected to the entrance of described low-pressure relief valve;
The refrigerant outlet of described economizer is also connected to the air inlet of described ORC compressor;
The outlet of described low-pressure relief valve is connected to the refrigerant inlet of described low pressure evaporator;
The refrigerant outlet of described low pressure evaporator is connected to the air inlet of described ORC compressor;
The cooled medium inlet of described economizer is connected to the cooled media outlet of described water cooler;
The cooled media outlet of described economizer is connected to the cooled medium inlet of described low pressure evaporator;
The cooled media outlet of described low pressure evaporator is connected to the level import of the next stage of described compound compressor.
6. the system of cooling compound compressor inlet gas according to claim 5, it is characterized in that, described ORC compressor is twin-stage ORC refrigeration compressor, the refrigerant outlet of described economizer is connected to the second level air inlet of described twin-stage ORC refrigeration compressor, and the refrigerant outlet of described low pressure evaporator is connected to the first order air inlet of described twin-stage ORC refrigeration compressor.
7. the system of cooling compound compressor inlet gas according to claim 6, it is characterized in that, described twin-stage ORC refrigeration compressor and described ORC turbine are structure as a whole, form ORC turbine refrigerant compression all-in-one, described ORC turbine refrigerant compression all-in-one comprises intermediate, main shaft, turbine volute, one-level spiral case, secondary spiral case, turbine wheel, one stage impeller, sencond stage impeller, central dividing plate, thrust disc and seal;
The two ends of described intermediate are the reeded flange of tool, and described main shaft is arranged in described intermediate by bearing rotationally;
Described turbine volute is fixed on the left end of described intermediate, and described secondary spiral case is fixed on the right-hand member of described intermediate, and described one-level spiral case is fixed on described secondary spiral case;
Described turbine wheel is fixed on the left end of described main shaft, and is positioned at described turbine volute; Described sencond stage impeller is fixed on the right-hand member of described main shaft, and is positioned at described secondary spiral case; Described one stage impeller is fixed on the right-hand member of described main shaft, and is positioned at the right side of described sencond stage impeller, and is positioned at described one-level spiral case;
The right-hand member of described main shaft is also provided with central dividing plate, and described central dividing plate is between described one stage impeller and sencond stage impeller;
The left end of described main shaft is also arranged with thrust disc, and described thrust disc is arranged with seal, and described seal is fixed on the left end of described intermediate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420627550.1U CN204268753U (en) | 2014-10-27 | 2014-10-27 | The system of refrigerating gas compressor or compound compressor inlet gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420627550.1U CN204268753U (en) | 2014-10-27 | 2014-10-27 | The system of refrigerating gas compressor or compound compressor inlet gas |
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| Publication Number | Publication Date |
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| CN204268753U true CN204268753U (en) | 2015-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420627550.1U Withdrawn - After Issue CN204268753U (en) | 2014-10-27 | 2014-10-27 | The system of refrigerating gas compressor or compound compressor inlet gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104315750A (en) * | 2014-10-27 | 2015-01-28 | 势加透博（北京）科技有限公司 | System and method for cooling gas compressor inlet gas |
-
2014
- 2014-10-27 CN CN201420627550.1U patent/CN204268753U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104315750A (en) * | 2014-10-27 | 2015-01-28 | 势加透博（北京）科技有限公司 | System and method for cooling gas compressor inlet gas |
| CN104315750B (en) * | 2014-10-27 | 2016-07-27 | 势加透博（北京）科技有限公司 | The system and method for cooling gas compressor inlet gas |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20150415 Effective date of abandoning: 20160727 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |