CN2879088Y - Heat exchanging module and refrigerant compressed-air purification machine - Google Patents

Abstract

This utility model provides a heat exchanger module and freezing -type compressed air purifier. The heat exchanger module is incorporated by a vertical-type complete reflux pre-cooler, a middle gas-water separator, a vertical-type complete reflux flooded evaporator, and a separation and refined filtration unit. The freezing -type compressed air purifier comprises a scroll compressor, a condenser, a filter-drier, a capillary, a gas-liquid separator, a hot air bypass valve, and a heat exchanger module; the scroll compressor, the condenser, the filter-drier, the capillary, the gas-liquid separator, the hot air bypass valve and the heat exchanger module, the vertical-type complete reflux flooded evaporator in the heat exchanger module and the hot air bypass valve are connected to form the refrigerating system in a regular way. As the heat exchanger module is integrated with many functions, the purifier can completely get rid of solid granules, water and oil, and simplify the purifier refrigerating system. The purifier has the advantages of simple and compact structure, and safe, stable and reliable operation, fully meeting the outlet air pressure dew point and small pressure drop specified in the national standard, moreover, the utility model has low expense for equipment investment and operation maintenance.

Description

Heat exchanger module and freezing type compressed air cleaner

Technical field

The utility model belongs to the compressed air drying field, particularly relates to a kind of heat exchanger module and freezing type compressed air cleaner.

Background technology

According to " GB/T13277 generally uses the compressed air quality grade " and " GB4830 industrial automation instrument bleed pressure scope and quality ", industrial automation instrument, pneumatic element and device such as spray paint are 1 with the compressed air quality grade, 4,1 grade, existing frozen compressed air dryer can not satisfy this requirement, need just to reach above-mentioned requirements mixing the cleaning system that corresponding coagulation type filter and adsorption filter form thereafter, such configuration will make initial cost Duo 30% than separately existing frozen compressed air dryer, the also corresponding increase of maintenance expense and erection space, pressure is reduced to the big 0.5bar that reduces, make the energy consumption of air compressor machine increase by 3.5%, the power consumption of quite existing frozen compressed air dryer will double, existing frozen compressed air dryer is many with shell-and-tube assorted stream heat exchange mode or plate-fin cross-flow heat exchange mode, from the heat transfer theory analysis and experimental results show that the hot side liquid inlet temperature of these two kinds of heat exchange modes and the temperature difference of the outlet temperature of cold-side fluid bigger, cause existing freeze drier to import and export the air temperature difference like this up to 10～17 ℃, the cold that the outlet air of lower temperature can not taken away the freeze drying air effect accounts for 50% of existing freeze drier refrigerating capacity greatly, be that its thermal efficiency has only about 50%, do not reach its specification or standard code 1.7～10 ℃ by the pressure leak source majority that records existing freeze drier outlet air through the qualified dew point hygrometer of standard sample gas verification at the scene, the condensation water quantity of discharging is far below the import and export air dew point by standard code, the standard condensation water quantity that flow measuring goes out, when moving at the scene, open that the draining valve majority of accurate filter bottom has water to discharge behind the freeze drier, illustrate that these freeze drier outlet air pressure leak sources can not be lower than outlet air temperature, by the standard code inlet temperature is 35 ℃, deduct 17 ℃ of the maximum import and export air temperature difference, its outlet air pressure leak source is not less than 18 ℃, does not reach＜10 ℃ standard-required.

Summary of the invention

In order to simplify the structure of existing air cleaning system, make the outlet air pressure leak source after the purification reach standard-required, the utility model provides a kind of heat exchanger module and the freezing type compressed air cleaner that can comprehensively remove solids, water and oil in the compressed air.

For this reason, the technical scheme of employing is as follows:

The technical scheme of heat exchanger module is: described module is by vertical full adverse current forecooler, middle moisture trap, vertical full adverse current flooded evaporator and separate smart filter unit and become one; The smart filter of described separation unit is combined by terminal moisture trap, filter knoisphere and oil strain layer; Be wrapped with heat-insulation layer in described module.

The technical scheme of freezing type compressed air cleaner is: which comprises at least screw compressor, condenser, device for drying and filtering, capillary, gas-liquid separator, hot gas bypass valve and at least one heat exchanger module; Described module is by vertical full adverse current forecooler, middle moisture trap, vertical full adverse current flooded evaporator and separate smart filter unit and become one.The smart filter of described separation unit is combined by terminal moisture trap, filter knoisphere and oil strain layer; Be wrapped with heat-insulation layer in described module; Described screw compressor, condenser, device for drying and filtering, capillary, gas-liquid separator, vertical full adverse current flooded evaporator, hot gas bypass valve connect and compose refrigeration system routinely.

In order further to understand the utility model, the technological process of describing described compressed air cleaner is as follows:

Technological process is made up of compressed air process for purifying flow process and refrigeration process flow process.Compressed air process for purifying flow process is: the hot humid air that comes from air compressor machine or compressed air pipe network air intlet pipe and the arm at each module forecooler top even each hot side liquid heat exchanger channels of inflow forecooler downwards by described clarifier, be subjected in the cold-side fluid heat exchanger channels to the low temperature finished product air cooling at upper reaches in the middle of but the back flows into moisture trap separate discharge account for the most condensate liquid of this module become in warm half-dried air, upwards flow into evenly downward each hot side liquid heat exchanger channels that flows into flooded evaporator of upper left-hand inlet of flooded evaporator again through the module left channel, be subjected to after the liquid low-temperature refrigerant cooling at upper reaches, to flow out in the cold-side fluid heat exchanger channels from flooded evaporator lower right side outlet, in warm half-dried air become contain a small amount of condensate liquid Cryogenic air again again through the terminal moisture trap, filter knoisphere and oil strain layer separating and filtering become and reach compressed air quality 1,4,1 grade low temperature finished product gas, flow into forecooler lower left side inlet then and evenly upwards flow into each cold-side fluid heat exchanger channels of forecooler, hot humid air heating back in the heat side fluid passage enters clarifier air outlet slit pipe from the arm on forecooler right side, and at this moment low temperature finished product gas becomes than low 2～4 ℃ the finished product gas only of the hot humid air in the clarifier air intlet pipe; The refrigeration process flow process is: comprise that through screw compressor → condenser → device for drying and filtering → capillary → flooded evaporator → gas-liquid separator → screw compressor the connecting line between each parts constitutes refrigeration process flow process main circulation loop by cold-producing medium, be connected across the hot gas bypass valve of screw compressor blast pipe and gas-liquid separator import and export pipe and connecting line load regulation branch road as refrigeration process flow process main circulation loop, hot gas bypass valve guarantee described freezing type compressed air cleaner can safety when loading on 0～100% range, stable, operation reliably.

Below, it is as follows to describe the beneficial effects of the utility model:

Precooling that described heat exchanger module is integrated, the secondary gas-water separation, evaporation and heat-exchange, dewater, dedusting, removing functional oil is one, its forecooler and flooded evaporator all adopt vertical full countercurrent heat exchange method, guarantee that cold-side fluid flows from bottom to top, hot side liquid flows from top to bottom, the high thermal resistance liquid film that making is condensed in the hot side liquid the is attached to heating surface heating surface that under the dragging of gravity and fluid friction power, slips away downwards quickly, condensate film enters each moisture trap with more complete state with hot side liquid, so both kept high heat-transfer effect, make the temperature difference of importing and exporting air have only 2～4 ℃, the thermal efficiency reaches 80%, greatly improve each moisture trap again, the separating effect of filter knoisphere and oil strain layer is given full play to the high advantage of dedusting oil removal efficiency under dry and cold condition.Because the freezing type compressed air cleaner adopts described heat exchanger module; refrigeration system is greatly simplified; except the flooded evaporator in the aforementioned modules; screw compressor is only arranged; condenser; device for drying and filtering; capillary; six individual components such as gas-liquid separator and hot gas bypass valve; saved the expansion valve that existing frozen compressed air dryer need dispose; crankcase heater; magnetic valve; liquid-sighting glass; oil eliminator; liquid reservoir; subcooler; evaporating pressure regulating valve; air and liquid mixer; air-breathing device for drying and filtering; annexes such as high-low pressure protective device and oil return system; reduce the manufacturing cost of described clarifier significantly; reduce the link that fault takes place and cold-producing medium leaks, improve the safety of operation; stablize and reliability.Compressed air after described clarifier is handled meets 1,4,1 grade of quality standard of " GB/T13277 " and " GB4830 " regulation.

Description of drawings

Fig. 1 is the structural representation of heat exchanger module.

Fig. 2 is the syndeton schematic diagram of freezing type compressed air cleaner.

The specific embodiment

Referring to Fig. 1, heat exchanger module is that the theory by general module designs, described heat exchanger module is by vertical full adverse current forecooler 1, middle moisture trap 2, vertical full adverse current flooded evaporator 3 and separate smart filter unit 4 and form, separate smart filter unit 4 and formed by terminal moisture trap 4a, filter knoisphere and the laminated dress of oil strain, the outer band vertical centering control of module divides face rigid foam insulation cladding 5.The housing of module and inner vertical full adverse current forecooler 1 and vertical full adverse current flooded evaporator 3 all use erosion-resisting aluminium to be welded into integral body, in order to obtain best dehumidifying and full countercurrent flow effect, described module adopts vertical structure, the core component of module is for separating smart filter unit 4, terminal moisture trap 4a wherein is made of gas averaging board and stainless steel cloth alternately and expanded metals, the filter knoisphere is made with the outstanding filter material of cohesion performance, the oil strain layer is made with the outstanding filter material of absorption property, on the housing that separates smart filter 4 tops, unit, removable cover plate is housed so that change silk screen and filter material or maintaining, the base plate that separates smart filter unit 4 and middle moisture trap 2 is respectively equipped with independently condensate discharge pipe, the top inlet end face of pipe should be than the connection high about 10mm in bottom surface, in case the dirt of condensate liquid precipitation stops up inlet or causes the automatic pollution discharge defective valve with the condensate liquid discharge.

Referring to the described freezing type compressed air cleaner of Fig. 2.The freezing type compressed air cleaner is made up of screw compressor 7, condenser 13, device for drying and filtering 12, capillary 11, gas-liquid separator 9, hot gas bypass valve 8 and at least one heat exchanger module 10.Described screw compressor 7, condenser 13, device for drying and filtering 12, capillary 11, gas-liquid separator 9, the vertical full adverse current flooded evaporator 3 of heat exchanger module 10, hot gas bypass valve 8 connect and compose refrigeration system routinely.Compressed air inlet pipe 14 is connected with the air inlet of heat exchanger module 10, and compressed air escape pipe 15 is connected with the gas outlet of heat exchanger module 10.Condenser 13 is air-cooled, and filter dirt curtain is equipped with in its place ahead, windward side.Gas-liquid separator 9 is that refrigeration system is to prevent compressor generation liquid hammer, guarantee that oil return is smooth and easy and store the annex of liquid refrigerant indispensability when shutting down; The hot gas bypass valve 8 that is connected across the import and export pipe of the blast pipe of screw compressor 7 and gas-liquid separator 9 constitutes refrigeration systems are guaranteed safe and stable operation when the fluctuation of load self-checking device, and hot gas bypass valve 8 provides the gaseous refrigerant of essential heat for the gasification of backflow liquid refrigerant in gas-liquid separator 9 and the outlet thereof and oil return simultaneously.

In the described freezing type compressed air cleaner of Fig. 2, the quantity of heat exchanger module 10 can be determined flexibly according to the specification of freezing type compressed air cleaner.

Claims (2)

1, heat exchanger module is characterized in that: by vertical full adverse current forecooler, middle moisture trap, vertical full adverse current flooded evaporator with separate smart filter unit and become one; The smart filter of described separation unit is combined by terminal moisture trap, filter knoisphere and oil strain layer; Be wrapped with heat-insulation layer in described module.

2, freezing type compressed air cleaner, at least comprise screw compressor, condenser, device for drying and filtering, capillary, gas-liquid separator, hot gas bypass valve, it is characterized in that: it also has at least one heat exchanger module, described heat exchanger module is by vertical full adverse current forecooler, middle moisture trap, vertical full adverse current flooded evaporator and separate smart filter unit and become one, the smart filter of described separations unit by the terminal moisture trap, filter knoisphere and the oil strain layer combines; Be wrapped with heat-insulation layer in described module; Described screw compressor, condenser, device for drying and filtering, capillary, gas-liquid separator, vertical full adverse current flooded evaporator, hot gas bypass valve connect and compose refrigeration system routinely.

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