CN102692091A - Mining high-pressure modularization underground concentration refrigerating device and system - Google Patents
Mining high-pressure modularization underground concentration refrigerating device and system Download PDFInfo
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- CN102692091A CN102692091A CN201210194002XA CN201210194002A CN102692091A CN 102692091 A CN102692091 A CN 102692091A CN 201210194002X A CN201210194002X A CN 201210194002XA CN 201210194002 A CN201210194002 A CN 201210194002A CN 102692091 A CN102692091 A CN 102692091A
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Abstract
The invention discloses a mining high-pressure modularization underground concentration refrigerating device and system. The mining high-pressure modularization underground concentration refrigerating device comprises a refrigeration and compression module, a high-pressure condensation module, a throttling expansion module, an evaporation cooling module, an oil path control module and a control system module; the refrigeration and compression module is used for preparing high-pressure high-temperature refrigerant vapor and outputting the high-pressure high-temperature refrigerant vapor to the high-pressure condensation module; the high-pressure condensation module is used for preparing high-pressure high-temperature refrigerant vapor output by the refrigeration and compression module to a high-pressure normal-temperature liquid refrigerant, and outputting the high-pressure normal-temperature liquid refrigerant to the throttling expansion module; the throttling expansion module is used for expanding the high-pressure normal-temperature liquid refrigerant to be a low-temperature normal-pressure gas refrigerant, and outputting the low-temperature normal-pressure gas refrigerant to the evaporation cooling module; the evaporation cooling module is used for evaporating and cooling the gas refrigerant, and outputting the processed gas refrigerant to the refrigeration and compression module; and the control system module uses a PLC (Programmable Logic Controller) to monitor above modules and display parameters through temperature and pressure sensors. With the adoption of the mining high-pressure modularization underground concentration refrigerating device and system provided by the invention, the problems of high pressure bearing, large heat exchange amount and small volume in a process for cooling a high-temperature deep well in China can be solved..
Description
Technical field
The present invention relates to a kind of mining high-voltage modularization down-hole central refrigerating device, also relate to a kind of down-hole central refrigerating system simultaneously.
Background technology
In recent years, along with the increase of the pit mining degree of depth, China's mine elevated temperature heat evil problem becomes increasingly conspicuous, and high-temperature mine quantity is also more and more.According to statistics, China has more than 130 at present to mine existence elevated temperature heat evil phenomenon in various degree, wherein more than 80 mine has been taked the mechanical refrigeration cooling measure.The various mine cooling system that is applied at present to put into practice can be divided into ice making cooling, chilled water cooling and the cooling of refrigeration wind according to the difference of defeated cold medium.No matter but be which kind of defeated cold medium, finally all be converted into cold wind and reduce down-hole mining working face air themperature; According to the layout feature of refrigerating plant can be divided into aboveground centralized, the down-hole is centralized, down-hole distributing (part), aboveground and down-hole association type.No matter which kind of form all is made up of refrigeration, defeated cold, cold scattering and heat extraction four big systems.
At present, external mine cooling mainly adopts ice making and chilled water pattern, is main with centralized refrigeration cool-down system.Such as the main centralized mechanical refrigeration water for cooling system that adopts big refrigerating capacity of, Germany; Ice-cold low-temp radiating mine cooling system is mainly adopted in South Africa.China is along with the increase gradually of the pit mining degree of depth; The required refrigeration duty of mine cooling also constantly increases; Ground central refrigerating (loss of refrigeration capacity is bigger) and down-hole local refrigeration (refrigerating capacity is not enough) can not have been satisfied the demand that full underground thermal pollution is administered, but tend to adopt down-hole centralized mechanical refrigeration water for cooling system gradually, reduce the loss of refrigeration capacity of system; Adopt high pressure-bearing condenser to replace the high-low pressure heat exchanger to carry the static pressure of phreatic water; Thereby the minimizing initial investment improves cryogenic energy utilization efficient, reduces operating cost.Some do not have waste heat (gas electricity waste heat) can utilize, utilize merely the deep mining mining area of electricity refrigeration particularly suitable to this cooling pattern in China East China.
In the centralized mechanical refrigeration water mine cooling system of down-hole, the central refrigerating device is the key of whole system.Domestic research and development to refrigeration of underground mine equipment at present also are to be in the stage at the early-stage.Patent (200710025002.6) discloses a kind of temp lowering device for deep mine, comprises ground unit and down-hole unit, and its main refrigeration plant (refrigeration unit) is positioned at ground, and cold is having a large amount of losses in the process of delivered downhole.Patent (201020548178.7) discloses a kind of packaged type refrigeration cool-down device that is applied under the coal mine, but the discharging of its condensation heat is positioned at the down-hole, so refrigerating capacity is restricted, and is less than normal.Patent 201120032780.X and 201120032790.3 disclose and have a kind ofly considered that condenser bears the refrigeration of underground mine unit of high pressure; But do not relate to the modularized design of each structure and whole device, the applicability of whole unit under mine do not considered.Zhao Lou's mining centralized chilled water cooling system of the down-hole central refrigerating of the external import of 2008 the 1st covers, the concentrated heat extraction in ground comes into operation in the colliery in Shandong, increases to 12 covers to the end of the year 2011.But regrettably; The employed down-hole central refrigerating of this 12 cover mine central refrigerating cooling system device all is external import; Domestic do not have a central refrigerating device in down-hole of the same type; From this point, develop domestic down-hole central refrigerating heat sink (the present invention) and be applied to and go in the mine cooling practice, have the meaning of particular importance.
Summary of the invention
In view of this; One of the object of the invention provides a kind of mining high-voltage modularization down-hole central refrigerating device; Can satisfy high pressure-bearing, big heat and small size problem that China's high temperature deep well mine cooling faces; The needs that adapt to China's high temperature deep well down-hole central refrigerating cooling are broken foreign technology monopolization; Two of the object of the invention provides a kind of mining high-voltage modularization down-hole central refrigerating system.
One of the object of the invention is realized through following technical scheme:
Mining high-voltage modularization down-hole central refrigerating device of the present invention comprises refrigerant compression module, high pressure condensation module, throttling expansion module, evaporative cooling module and control system module;
One end of said refrigerant compression module links to each other with the high pressure condensation module, and an end links to each other with the evaporative cooling module, is used to prepare high pressure, high temperature refrigerant steam, and exports the high pressure condensation module to;
One end of said high pressure condensation module links to each other with the refrigerant compression module, and an end links to each other with the throttling expansion module, is used for the high pressure, high temperature refrigerant steam production of refrigerant compression module output is become high normal pressure and temperature liquid refrigerant, and exports the throttling expansion module to; Said high pressure condensation module is made up of high pressure-bearing shell-and-tube heat exchanger, adopts the water-cooled pattern;
One end of said throttling expansion module links to each other with the high pressure condensation module, and an end links to each other with the evaporative cooling module, is used to make the liquid refrigerant expansion of high normal pressure and temperature to become the gaseous refrigerant of low-temperature atmosphere-pressure, and exports the evaporative cooling module to;
One end of said evaporative cooling module links to each other with the refrigerant compression module, and an end links to each other with the throttling expansion module, is used for gaseous refrigerant is carried out evaporative cooling, exports the refrigerant compression module after the processing to;
Said control system module adopts PLC that above-mentioned each module is controlled, and realizes the monitoring of above-mentioned each module and parameter are shown through temperature, pressure sensor.
Said refrigerant compression module comprises soft initiator, flame-proof electric motor and screw compressor; Said flame-proof electric motor links to each other with screw compressor; For the operation of compressor provides power, said soft initiator links to each other with flame-proof electric motor, makes flame-proof electric motor realize soft start;
Said device also comprises the oil piping system module; Screw compressor in said oil piping system module and the cold compression module is used; Said oil piping system module comprises oil eliminator, stop valve, oil cooler, oil strainer and oil pump; Compressor in the refrigerant compression module is discharged the mixed vapour of cold-producing medium and oil, before getting into the high pressure condensation module, is introduced into the oil eliminator in the oil piping system module, and cold-producing medium and oil content are opened; Oil after the separation gets into oil cooler through stop valve, and cooled oil gets into compressor once more through oil pump and circulates.
Further, said oil cooler adopts shell-and-tube heat exchanger, adopts surface water cooling, and cooling water is walked tube side, and oil is walked shell side, and heat exchanger water side can be born the high pressure of 16Mpa at least; The high pressure-bearing shell-and-tube heat exchanger of said high pressure condensation module adopts surface water cooling, and cooling water is walked tube side, and cold-producing medium is walked shell side, and heat exchanger water side can be born the high pressure of 16Mpa at least;
Further, whole device adopts a word string to join and arranges, satisfies mine transportation and installation requirement on height and the width;
Further, each part of said device adopts modularization to handle, and complete machine forms modular construction, and the parallel connection of being convenient to many table apparatus is used, and bigger refrigerating capacity is provided.
Further; Said throttling expansion module comprises device for drying and filtering and at least one expansion valve; Said expansion valve number is identical with high pressure-bearing shell-and-tube heat exchanger number in the high pressure condensation module, at first gets into device for drying and filtering after high pressure condensation module mesohigh normal temperature liquid refrigerant comes out, and removes the moisture in the cold-producing medium; Get into throttle expansion valve then, make the gaseous refrigerant of liquid refrigerant expansion the becoming low-temperature atmosphere-pressure of high normal pressure and temperature.
Further, the evaporative cooling module is made up of shell-and-tube heat exchanger equally,
Further, on the pipeline that links to each other between evaporative cooling module and the refrigerant compression module air-breathing filter is installed, to entering into the cold-producing medium aseptic in the compressor.
Two of the object of the invention is realized through following technical scheme:
This mining high-voltage modularization down-hole central refrigerating system comprises foregoing mining high-voltage modularization down-hole central refrigerating device, also comprises cooling water recirculation system, the chilled water circulatory system, terminal cold scattering equipment, ground cooling system, water charging system and monitoring system;
Said ground cooling system and part cooling water recirculation system are arranged on the ground; All the other parts are arranged in the down-hole; The cryogenic freezing water that said mining high-voltage modularization down-hole central refrigerating device produces is delivered in the terminal cold scattering equipment of coal mine excavation working face through the chilled water circulatory system; Carry out heat exchange with getting working face is distinguished and admirable, the chilled water that absorbed thermic load is through cold again in the chilled water circulating pump 7 access to plant 1 again;
The condensation heat that said mining high-voltage modularization down-hole central refrigerating device produces is delivered in the cooling system of ground through cooling water recirculation system and is cooled; The condensation heat that cooling water after being cooled produces through absorption plant in cooling water recirculation system access to plant again; Said replenishing water tank of water is used for to cooling water recirculation system, chilled water circulatory system automatic water supplement, and the pipeline in the cooling water recirculation system causes the down-hole through pit shaft or boring;
Said monitoring system is used for the relevant parameter of whole each link of cooling system is monitored, and each electrical equipment is controlled automatically, accomplishes the coordinated operation and the defencive function of whole system.
Further; Said system also comprises down-hole PLC control station and ground PLC control station; Said down-hole PLC control station is used for down-hole chilled water closed circuit and corresponding water charging system; Comprise the control of the equipment such as motor-driven valve on chilled water circulating pump, small pump and the respective line, the demonstration and the collection of parameter; Down-hole PLC control station is controlled system communication through communication interface and mining high-voltage modularization down-hole central refrigerating device self PLC, accomplishes the collection of refrigerating plant Monitoring Data simultaneously and assigns control command;
Said ground PLC control station is used for the automatic monitoring of ground cooling water recirculation system; Comprise the control of the equipment such as motor-driven valve on chilled water circulating pump, small pump and the respective line, the demonstration and the collection of parameter; Down-hole PLC control station and ground PLC control station link to each other through mine EPA and mine control room and mine complex automatic system; Realize the mine cooling system automatic control, and under automatic control mode the realization ground remote control.
Further; The cooling device of said ground cooling system adopts cooling tower; Terminal heat dissipation equipment adopts air cooler, and the said chilled water circulatory system comprises chilled water circulation line and chilled water circulating pump, and said cooling water recirculation system comprises cooling water circulation line and cooling water circulating pump.
The invention has the beneficial effects as follows:
1. the present invention can satisfy high pressure-bearing, big heat and the small size problem that China's high temperature deep well mine cooling faces, and adapts to the needs of China's high temperature deep well down-hole central refrigerating cooling, breaks foreign technology monopolization;
2. device of the present invention adopts modularized design, not only helps transportation and installation on the one hand, also helps overhauling and safeguarding; The modularization of complete machine can make many these device parallel connections use on the other hand, to satisfy the required refrigeration duty of pit mining different times;
3. adopt high pressure condenser to replace the high-low pressure conversion equipment to carry high pressure (applicable to the km high temperature deep well; Bear maximum hydraulic pressure 16MPa); Thereby reduced initial investment (single cover high-low pressure conversion equipment be worth millions of units), and cooling water cools off on ground, cause the down-hole through pipeline; Whole device is stable, and is safe and reliable.
Other advantages of the present invention, target and characteristic will be set forth in specification subsequently to a certain extent; And to a certain extent; Based on being conspicuous to those skilled in the art, perhaps can from practice of the present invention, obtain instruction to investigating of hereinafter.Target of the present invention and other advantages can realize and obtain through following specification.
Description of drawings
In order to make the object of the invention, technical scheme and advantage clearer, will combine accompanying drawing that the present invention is made further detailed description below, wherein:
Fig. 1 is that device of the present invention is formed structural representation;
Fig. 2 is the refrigeration basic principle schematic;
Fig. 3 is a refrigeration process schematic flow sheet of the present invention;
Fig. 4 is a mining high-voltage modularization down-hole central refrigerating device embodiment front view;
Fig. 5 is a mining high-voltage modularization down-hole central refrigerating device embodiment side view;
Fig. 6 is the composition structural representation of mining high-voltage modularization down-hole central refrigerating system;
Fig. 7 is that mine cooling system monitoring system forms sketch map.
The specific embodiment
Below will carry out detailed description to the preferred embodiments of the present invention with reference to accompanying drawing.Should be appreciated that preferred embodiment has been merely explanation the present invention, rather than in order to limit protection scope of the present invention.
As shown in Figure 1; Mining high-voltage modularization down-hole central refrigerating device of the present invention; Comprise refrigerant compression module, high pressure condensation module, throttling expansion module, evaporative cooling module, oil piping system module and control system module, below will be following to the concrete formation division of each module:
(1) refrigerant compression module: in the present embodiment, the refrigerant compression module mainly is made up of soft initiator, flame-proof electric motor and screw compressor.Flame-proof electric motor links to each other with screw compressor, for the operation of compressor provides power.The electric pressure of flame-proof electric motor is 10000V, therefore, soft initiator is set, and soft initiator links to each other with flame-proof electric motor, makes flame-proof electric motor realize soft start.Screw compressor adopts side valve type unloading magnetic valve, and 10%～100% step-less adjustment is prevented the flame proof transformation to the magnetic valve on the screw compressor in addition; Satisfy inflammable and explosive subsurface environment instructions for use; Install temperature, pressure sensor on the exhaust outlet of compressor pipeline, adopt anti-flame proof grade, the degree of protection identical with the compressor magnetic valve, sensor line links to each other with the control system module; Refrigerant compression module one end links to each other with the high pressure condensation module, and an end links to each other with the evaporative cooling module;
(2) high pressure condensation module: the high pressure, high temperature refrigerant steam that the refrigerant compression module is come out gets into the high pressure condensation module after treatment.The high pressure condensation module mainly is made up of high pressure-bearing shell-and-tube heat exchanger, adopts the water-cooled pattern.Cooling water is walked tube side, and cold-producing medium is walked shell side, and heat exchanger tube is selected copper pipe for use, adopts the enhanced heat exchange mode, strengthens the heat exchange effect, reaches the purpose of the big heat of small size.The shell-and-tube heat exchanger concrete structure is a fixed tube-sheet exchanger; The first connected mode that rises earlier and connect, afterwards weld that adopts of copper pipe and tube sheet, the heat exchanger cooling water is walked tube side, and bearing capacity can reach 16MPa; Cold-producing medium is walked shell side, and the bearing capacity maximum can reach 2.5MPa.Because need use at deep-well, the ground cooling water is delivered to the down-hole need bear very high static pressure, bears maximum pressure 16MPa so the present invention designs heat exchanger water side; Vertical height can reach 1600m; Replaced the high-low pressure conversion equipment, the high pressure-bearing shell-and-tube heat exchanger in this module can be for single, also can be for a plurality of; The different combinations mode is all within protection scope of the present invention; Concrete number can be adjusted according to conditions down-hole, and the shell-and-tube heat exchanger diameter is reduced as far as possible, and length direction can suitably relax.When the high pressure-bearing shell-and-tube heat exchanger in this module is a plurality of, should be set to paralleling model.The condensation temperature of cold-producing medium is 43 ℃ in this module tubes shell heat exchanger, 31 ℃ of cold in-water temperatures, 40 ℃ of leaving water temperatures.High pressure-bearing shell-and-tube heat exchanger is imported and exported on the pipeline temperature, pressure and flow sensor all is installed; Sensor adopts anti-flame proof grade, the degree of protection identical with the compressor magnetic valve; Sensor line links to each other with the control system module; On the high pressure-bearing shell-and-tube heat exchanger export pipeline liquid level gauge is installed also, can be used to observe heat exchanger inner refrigerant liquid level (it is liquid that cooled cold-producing medium gradually becomes); High pressure condensation module one end links to each other with the refrigerant compression module, and an end links to each other with the throttling expansion module, and high pressure condensation module cooling power is not less than 4000kW;
(3) throttling expansion module: the throttling expansion module mainly is made up of device for drying and filtering and at least one expansion valve, and the expansion valve number is identical with high pressure-bearing shell-and-tube heat exchanger number in the high pressure condensation module.Throttling expansion module one end links to each other with the high pressure condensation module, and an end links to each other with the evaporative cooling module.After coming out, high pressure condensation module mesohigh normal temperature liquid refrigerant at first gets into device for drying and filtering; Remove the moisture in the cold-producing medium; Get into throttle expansion valve then; Main effect is the liquid refrigerant of high normal pressure and temperature to be expanded become the gaseous refrigerant of low-temperature atmosphere-pressure, and cold-producing medium evaporation heat absorption produces low temperature cold source in this process;
(4) evaporative cooling module: the evaporative cooling module is made up of shell-and-tube heat exchanger equally; The shell-and-tube heat exchanger concrete structure is a fixed tube-sheet exchanger; Heat exchanger tube is selected copper pipe for use; The first connected mode that rises earlier and connect, afterwards weld that adopts of copper pipe and tube sheet, its structure is consistent with the high pressure-bearing shell-and-tube heat exchanger in the high pressure condensation module.Heat exchanger one side is a gaseous refrigerant, walks tube side, and maximum working pressure (MWP) is 2.5MPa; Opposite side is a water, walks shell side, and maximum working pressure (MWP) is 4MPa.Shell-and-tube heat exchanger equally can be for single, also can be for a plurality of, and the different combinations mode all within protection scope of the present invention, can adjust according to conditions down-hole, and the shell-and-tube heat exchanger diameter is reduced as far as possible by concrete number, and length direction can suitably relax.Cold-producing medium evaporating temperature in this evaporative cooling module in the shell-and-tube heat exchanger is 0 ℃, 18 ℃ of chilled water inflow temperatures, 3 ℃ of leaving water temperatures.Shell-and-tube heat exchanger is imported and exported on the pipeline temperature, pressure and flow sensor all is installed in the evaporative cooling module, and sensor adopts anti-flame proof grade, the degree of protection identical with the compressor magnetic valve, and sensor line links to each other with the control system module.Evaporative cooling module one end links to each other with the refrigerant compression module, and an end links to each other with the throttling expansion module.Linking to each other between evaporative cooling module and the refrigerant compression module is equipped with air-breathing filter on the pipeline, to entering into the cold-producing medium aseptic in the compressor.Evaporative cooling module refrigerating capacity is not less than 3000kW; The high pressure-bearing shell-and-tube heat exchanger (evaporimeter) of evaporative cooling module is 2 among the embodiment shown in Figure 4; Diameter is different; Be divided into main evaporator and auxilliary evaporimeter, what diameter was big is auxilliary evaporimeter (the internal refrigeration storage agent is most of to be gaseous state), and what diameter was little is main evaporator (the internal refrigeration storage agent is a liquid-vapor mixture); The two arranged in series, the middle different flange of diameter that adopts connects.Cold water is introduced into auxilliary evaporimeter, laggardly goes into main evaporator, flows out through two-stage cooling back, supplies the mine cooling use.
(5) oil piping system module: the compressor in the refrigerant compression module of the present invention adopts screw compressor, and distributive value is big, therefore needs the special oil piping system that is equipped with, and can play lubrication on the one hand, can reduce compressor exhaust temperature on the other hand.The oil piping system module comprises oil eliminator, stop valve, oil cooler, oil strainer and oil pump.Compressor in the refrigerant compression module is discharged the mixed vapour of cold-producing medium and oil, before getting into the high pressure condensation module, is introduced into the oil eliminator in the oil piping system module, and cold-producing medium and oil content are opened.Oil after the separation gets into oil cooler through stop valve, and cooled oil gets into compressor once more through oil pump and circulates.Oil cooler adopts the water-cooling type shell-and-tube heat exchanger among the present invention, and specific constructive form is similarly fixed tube-sheet exchanger, and is identical with fixed tube-sheet exchanger structure in high pressure condensation module and the evaporative cooling module.Cooling water is walked tube side in different is the shell-and-tube heat exchanger that oil cooler adopts, and oil is walked shell side.Owing to adopt surface water cooling, so heat exchanger water side need be born the high pressure of 16MPa equally.Oil cooler is imported and exported on the pipeline temperature, pressure sensor all is installed in the oil piping system module, and sensor adopts explosive-proof grade, the degree of protection identical with the compressor magnetic valve, and sensor line links to each other with the control system module.The oil piping system module is closed circulation, and exists between the refrigerant compression module, high pressure condensation module and intersect;
(6) control system module: the control system module adopts PLC control; Can realize that through temperature, pressure sensor monitoring, parameter to other modules show; Being provided with interface links to each other with down-hole PLC control station through Profibus communication; And will monitor video data and upload, realize down-hole PLC control station and refrigerating plant self PLC control system exchanges data and share, accomplish short range and remote auto control and defencive function to this refrigerating plant.
The basic principle of mining high-voltage modularization down-hole central refrigerating device of the present invention is as shown in Figure 2, is summarized as follows:
The low-pressure gaseous refrigerant that compressor will absorb thermic load sucks and the boil down to high-pressure and high-temperature steam, and with the heat transferred cooling water, cold-producing medium becomes normal temperature high voltage liquid simultaneously through condenser (the high pressure-bearing shell-and-tube heat exchanger in the high pressure condensation module).Then the cold-producing medium under the normal temperature high voltage state is through expansion valve, and expenditure and pressure becomes the low-temperature atmosphere-pressure gas-fluid two-phase mixture and gets into evaporimeter (shell-and-tube heat exchanger in the evaporative cooling module).Liquid refrigerant is sweat cooling (heat absorption) in evaporimeter, produces to be used for and the distinguished and admirable cryogenic freezing water that carries out heat exchange.Absorbing cold-producing medium after the thermic load gets into compressor with the normal pressure gaseous state and circulates once more.
Be the basis with above-mentioned principle, the principle and the technological process of mining high-voltage modularization down-hole central refrigerating device operation provided by the invention are following:
Flame-proof electric motor provides power; Drive compressor operation, the gaseous refrigerant in the heat exchanger in the evaporative cooling module is sucked, the ejection of boil down to high temperature and high pressure gaseous refrigerant; Simultaneously; Oil pump in the oil piping system module sprays oil, and cooling compressor can also play lubrication on the one hand on the one hand.At this moment, the mixed vapour of cold-producing medium and oil gets into oil eliminator.After separating, pure refrigerant vapour gets in the high pressure-bearing shell-and-tube heat exchanger in the high pressure condensation module.Through the cooling effect of cooling water in the heat exchanger, high temperature and high pressure gaseous refrigerant becomes the normal temperature high voltage liquid refrigerant.The normal temperature high voltage liquid refrigerant promptly gets into the device for drying and filtering the throttling expansion module after the high pressure condensation module comes out; Remove the moisture in the cold-producing medium; Get into throttle expansion valve then; Through throttling expansion, become the low-temperature atmosphere-pressure gaseous refrigerant and get in the shell-and-tube heat exchanger in the evaporative cooling module.In heat exchanger inner refrigerant evaporation heat absorption, the temperature of water is reduced, produce cryogenic freezing water.Gaseous refrigerant gets into compressor compresses once more through air-breathing filter, once more circulation.In this unit oil piping system, the high-temperature oil gas that oil eliminator is separated gets into oil cooler, and the cooling water shunting sub-fraction that ground is come gets into oil cooler cooling down high-temperature oil gas, and cooled oil gets into compressor cycle again through oil pump and uses.The operation of refrigerating plant and control realize through the PLC of control system module.Whole process flow is as shown in Figure 3.
Fig. 4,5 is mining high-voltage modularization down-hole central refrigerating device embodiment front view of the present invention and side view, and wherein the meaning of each Reference numeral is following:
The 1-fire-proof motor; The 2-compressor; The 3-oil eliminator; The 4-condenser; The 5-device for drying and filtering; The 6-throttle expansion valve; The 7-main evaporator; 8-assists evaporimeter; The air-breathing filter of 9-; 10-cooling water isocon; The 11-oil cooler; 12-oil pump and pipeline; The 13-hot water inlet; The 14-hot water outlet; The 15-cooling water inlet; The 16-cooling water outlet; 17-foundation bolt and base; The 18-suspension ring.
In the present embodiment; High pressure-bearing shell-and-tube heat exchanger (condenser) is set to 2 in the high pressure condensation module, and specification is identical, and parallel connection is arranged; Corresponding throttling expansion module is provided with 2 devices for drying and filtering, expansion valve; High pressure-bearing shell-and-tube heat exchanger (evaporimeter) is set to 2 in the evaporative cooling module, specification (length, diameter) difference, arranged in series.
The high pressure-bearing shell-and-tube heat exchanger (evaporimeter) of evaporative cooling module is 2 among the embodiment shown in Figure 4; Diameter is different; Be divided into main evaporator and auxilliary evaporimeter; What diameter was big is auxilliary evaporimeter (the internal refrigeration storage agent is most of to be gaseous state), and what diameter was little is main evaporator (the internal refrigeration storage agent is a liquid-vapor mixture), the two arranged in series.Cold water is introduced into auxilliary evaporimeter, laggardly goes into main evaporator, flows out through two-stage cooling back, supplies the mine cooling use.
Mining high-voltage modularization down-hole central refrigerating device provided by the invention adopts modularized design, comprises the content of two aspects, and the one, each part of device adopts modularization to handle (each module front is introduced); The 2nd, the whole machine using modularization is handled, and can carry out dilatation very easily, because many table apparatus can use in parallel connection, bigger refrigerating capacity is provided.
Mining high-voltage modularization down-hole central refrigerating device provided by the invention adopts structure in one line, middle back three parts before being divided into.Forward part is mainly motor, compressor, and the middle part is mainly oil eliminator and oil cooler, and the rear section is mainly evaporimeter and condenser, and other parts are put according to scene and comfort level condition.Each several part is a detachable form, makes its monnolithic case size can satisfy mine transportation and installation requirement.
The anti-flame proof standard of all electric components of mining high-voltage modularization down-hole central refrigerating device provided by the invention satisfies inflammable and explosive subsurface environment instructions for use; Be explosive-proof grade: Exd I [flame-proof mine] or Exd ib I [mine intrinsic safety type], degree of protection: IP54 or IP55.
Mining high-voltage modularization down-hole central refrigerating device self PLC provided by the invention control system mainly monitors following parameter: compressor air suction pressure, pressure at expulsion, injection pressure, suction temperature, delivery temperature, oil spout temperature, oil pressure are poor, energy level, chilled water Inlet and outlet water temperature and flow, cooling water Inlet and outlet water temperature and flow, total run time, compressor electric motor overload, Oil pump electrical machinery overload, public alarm, common fault, emergency shutdown etc.;
The whole device of mining high-voltage modularization down-hole central refrigerating device provided by the invention is installed shockproof base, adopts foundation bolt to fix, and installs suspension ring on each critical piece, convenient transportation and installation.
Based on above-mentioned device, the present invention also provides more than one to state mining high-voltage modularization down-hole central refrigerating device and has concentrated the mine cooling system of heat extraction for down-hole central refrigerating, the ground on basis.
This system comprises mining high-voltage modularization down-hole central refrigerating device, cooling water recirculation system, the chilled water circulatory system, terminal cold scattering equipment, ground cooling system, water charging system and monitoring system composition.
As shown in Figure 6, in this system, except that ground cooling system and part cooling water recirculation system, all the other system's parts are arranged in the down-hole.During mining high-voltage modularization down-hole central refrigerating device 31 normal operations; Producing cryogenic freezing water delivers in the terminal cold scattering equipment 34 of coal mine excavation working face through the chilled water circulatory system (33-chilled water circulation line, 37-chilled water circulating pump); Carry out heat exchange with getting working face is distinguished and admirable; Reduce the getting working face environment temperature, reach the purpose of creating suitable working environment, the chilled water that absorbed thermic load is through cold again in the chilled water circulating pump 37 access to plant 31 again.The condensation heat that mining high-voltage modularization down-hole central refrigerating device 31 produces is delivered in the cooling system of ground through cooling water recirculation system (32-cooling water circulation line, 38-cooling water circulating pump) and is cooled, and the cooling device of ground cooling system can be cooling tower or other suitable coolers.The condensation heat that cooling water after being cooled produces through absorption plant in cooling water circulating pump access to plant 31 again 1.The 36th, replenishing water tank of water can be to cooling water recirculation system, chilled water circulatory system automatic water supplement.Pipeline 32 in the cooling water recirculation system causes the down-hole through 39 (pit shaft or borings), need bear higher hydrostatic pressure.
Down-hole central refrigerating, the ground that is the basis with mining high-voltage modularization down-hole central refrigerating device provided by the invention concentrates the mine cooling system of heat extraction also to comprise monitoring system.Monitoring system requires the relevant parameter of each link of whole cooling system is monitored, and each electrical equipment is controlled automatically, accomplishes the coordinated operation and the defencive function of whole system.Mining high-voltage modularization down-hole central refrigerating device self adopts PLC control; One cover down-hole PLC control station is set in the down-hole in addition; Realization comprises the control of the equipment such as motor-driven valve on chilled water circulating pump, small pump and the respective line, the demonstration and the collection of parameter to down-hole chilled water closed circuit and corresponding water charging system.This down-hole PLC control station is through Profibus interface and mining high-voltage modularization down-hole central refrigerating device self PLC control system communication, and the while also can be accomplished the collection of refrigerating plant Monitoring Data and assigned control command.An other cover ground PLC control station also need be set on ground, accomplish the automatic monitoring of ground cooling water recirculation system, comprise the control of the equipment such as motor-driven valve on chilled water circulating pump, small pump and the respective line, the demonstration and the collection of parameter.Two the PLC control stations in down-hole and ground all pass through linking to each other of mine EPA and mine control room and mine complex automatic system, realize the mine cooling system automatic control, and under automatic control mode, can realize ground remote control.The composition of mine cooling system monitoring system is as shown in Figure 7.
Explanation is at last; Above embodiment is only unrestricted in order to technical scheme of the present invention to be described; Although with reference to preferred embodiment the present invention is specified, those of ordinary skill in the art should be appreciated that and can make amendment or be equal to replacement technical scheme of the present invention; And not breaking away from the aim and the scope of present technique scheme, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (10)
1. mining high-voltage modularization down-hole central refrigerating device is characterized in that: said device comprises refrigerant compression module, high pressure condensation module, throttling expansion module, evaporative cooling module and control system module;
One end of said refrigerant compression module links to each other with the high pressure condensation module, and an end links to each other with the evaporative cooling module, is used to prepare high pressure, high temperature refrigerant steam, and exports the high pressure condensation module to;
One end of said high pressure condensation module links to each other with the refrigerant compression module, and an end links to each other with the throttling expansion module, is used for the high pressure, high temperature refrigerant steam production of refrigerant compression module output is become high normal pressure and temperature liquid refrigerant, and exports the throttling expansion module to; Said high pressure condensation module is made up of high pressure-bearing shell-and-tube heat exchanger, adopts the water-cooled pattern;
One end of said throttling expansion module links to each other with the high pressure condensation module, and an end links to each other with the evaporative cooling module, is used to make the liquid refrigerant expansion of high normal pressure and temperature to become the gaseous refrigerant of low-temperature atmosphere-pressure, and exports the evaporative cooling module to;
One end of said evaporative cooling module links to each other with the refrigerant compression module, and an end links to each other with the throttling expansion module, is used for gaseous refrigerant is carried out evaporative cooling, exports the refrigerant compression module after the processing to;
Said control system module adopts PLC that above-mentioned each module is controlled, and realizes the monitoring of above-mentioned each module and parameter are shown through temperature, pressure sensor;
Said refrigerant compression module comprises soft initiator, flame-proof electric motor and screw compressor; Said flame-proof electric motor links to each other with screw compressor; For the operation of compressor provides power, said soft initiator links to each other with flame-proof electric motor, makes flame-proof electric motor realize soft start;
Said device also comprises the oil piping system module; Screw compressor in said oil piping system module and the cold compression module is used; Said oil piping system module comprises oil eliminator, stop valve, oil cooler, oil strainer and oil pump; Compressor in the refrigerant compression module is discharged the mixed vapour of cold-producing medium and oil, before getting into the high pressure condensation module, is introduced into the oil eliminator in the oil piping system module, and cold-producing medium and oil content are opened; Oil after the separation gets into oil cooler through stop valve, and cooled oil gets into compressor once more through oil pump and circulates.
2. mining high-voltage modularization down-hole central refrigerating device according to claim 1; It is characterized in that: said oil cooler adopts shell-and-tube heat exchanger, adopts surface water cooling, and cooling water is walked tube side; Oil is walked shell side, and heat exchanger water side can be born the high pressure of 16Mpa at least; The high pressure-bearing shell-and-tube heat exchanger of said high pressure condensation module adopts surface water cooling, and cooling water is walked tube side, and cold-producing medium is walked shell side, and heat exchanger water side can be born the high pressure of 16Mpa at least.
3. mining high-voltage modularization down-hole central refrigerating device according to claim 1 is characterized in that: whole device adopts a word string to join and arranges, satisfies mine transportation and installation requirement on height and the width.
4. according to claim 1 or 2 or 3 described mining high-voltage modularization down-hole central refrigerating devices; It is characterized in that: each part of said device adopts modularization to handle; Complete machine forms modular construction, and the parallel connection of being convenient to many table apparatus is used, and bigger refrigerating capacity is provided.
5. mining high-voltage modularization down-hole central refrigerating device according to claim 1; It is characterized in that: said throttling expansion module comprises device for drying and filtering and at least one expansion valve; Said expansion valve number is identical with high pressure-bearing shell-and-tube heat exchanger number in the high pressure condensation module; After coming out, high pressure condensation module mesohigh normal temperature liquid refrigerant at first gets into device for drying and filtering; Remove the moisture in the cold-producing medium, get into throttle expansion valve then, make the gaseous refrigerant of liquid refrigerant expansion the becoming low-temperature atmosphere-pressure of high normal pressure and temperature.
6. mining high-voltage modularization down-hole central refrigerating device according to claim 1, it is characterized in that: the evaporative cooling module is by the shell-and-tube heat exchanger group.
7. mining high-voltage modularization down-hole central refrigerating device according to claim 6 is characterized in that: on the pipeline that links to each other between evaporative cooling module and the refrigerant compression module air-breathing filter is installed, to entering into the cold-producing medium aseptic in the compressor.
8. mining high-voltage modularization down-hole central refrigerating system; It is characterized in that: said system comprises like the described mining high-voltage modularization of claim 1 to 7 down-hole central refrigerating device, also comprises cooling water recirculation system, the chilled water circulatory system, terminal cold scattering equipment, ground cooling system, water charging system and monitoring system;
Said ground cooling system and part cooling water recirculation system are arranged on the ground; All the other parts are arranged in the down-hole; The cryogenic freezing water that said mining high-voltage modularization down-hole central refrigerating device produces is delivered in the terminal cold scattering equipment of coal mine excavation working face through the chilled water circulatory system; Carry out heat exchange with getting working face is distinguished and admirable, the chilled water that absorbed thermic load is through cold again in chilled water circulating pump access to plant again;
The condensation heat that said mining high-voltage modularization down-hole central refrigerating device produces is delivered in the cooling system of ground through cooling water recirculation system and is cooled; The condensation heat that cooling water after being cooled produces through absorption plant in cooling water recirculation system access to plant again; Said replenishing water tank of water is used for to cooling water recirculation system, chilled water circulatory system automatic water supplement, and the pipeline in the cooling water recirculation system causes the down-hole through pit shaft or boring;
Said monitoring system is used for the relevant parameter of whole each link of cooling system is monitored, and each electrical equipment is controlled automatically, accomplishes the coordinated operation and the defencive function of whole system.
9. mining high-voltage modularization according to claim 8 down-hole central refrigerating system; It is characterized in that: said system also comprises down-hole PLC control station and ground PLC control station; Said down-hole PLC control station is used for down-hole chilled water closed circuit and corresponding water charging system; Comprise the control of the equipment such as motor-driven valve on chilled water circulating pump, small pump and the respective line, the demonstration and the collection of parameter; Down-hole PLC control station is controlled system communication through communication interface and mining high-voltage modularization down-hole central refrigerating device self PLC, accomplishes the collection of refrigerating plant Monitoring Data simultaneously and assigns control command;
Said ground PLC control station is used for the automatic monitoring of ground cooling water recirculation system; Comprise the control of the equipment such as motor-driven valve on chilled water circulating pump, small pump and the respective line, the demonstration and the collection of parameter; Down-hole PLC control station and ground PLC control station link to each other through mine EPA and mine control room and mine complex automatic system; Realize the mine cooling system automatic control, and under automatic control mode the realization ground remote control.
10. according to Claim 8 or 9 described mining high-voltage modularization down-hole central refrigerating systems; It is characterized in that: the cooling device of said ground cooling system adopts cooling tower; Terminal heat dissipation equipment adopts air cooler; The said chilled water circulatory system comprises chilled water circulation line and chilled water circulating pump, and said cooling water recirculation system comprises cooling water circulation line and cooling water circulating pump.
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