CN203342632U - Combined compressed air cryogenic dehumidifier - Google Patents
Combined compressed air cryogenic dehumidifier Download PDFInfo
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- CN203342632U CN203342632U CN 201320348154 CN201320348154U CN203342632U CN 203342632 U CN203342632 U CN 203342632U CN 201320348154 CN201320348154 CN 201320348154 CN 201320348154 U CN201320348154 U CN 201320348154U CN 203342632 U CN203342632 U CN 203342632U
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- deep cooling
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Abstract
The utility model relates to the technical field of compressed air dehumidifiers, and particularly relates to a combined compressed air cryogenic dehumidifier. The combined compressed air cryogenic dehumidifier comprises at least two evaporators, wherein a condenser is arranged between any two adjacent evaporators; at least two frosting devices are connected with an air outlet end of the last evaporator in parallel along the compressed air transmission direction; compressed air firstly passes through the evaporators and the condensers which are arranged in a staggered way; the temperature is reduced to 2 to 4 DEG C through the evaporators, and condensation is realized, so that a part of water vapor is removed; then the temperature is raised to normal temperature through the condensers; then the compressed air enters the next evaporator, so as to be subjected to condensation and dehumidification; the processes are repeated, and the compressed air is subjected to repeated cooling, condensation and dehumidification and then enters the frosting devices; and the frosting devices ensure that water vapor in the compressed air is frosted and leaked, so that the dew point of the compressed air is further reduced, and cryogenic dehumidification is realized.
Description
Technical field
The application relates to compressed air dehumidifier technical field, particularly a kind of combined compressed air deep cooling dehumidifier.
Background technology
Compressed air in the industrial extensive use of pneumatic system contains a large amount of saturated liquid state and vaporous water usually.In order to prevent that these liquid state and vaporous water from working the mischief to the normal operation of pneumatic system, need to dehumidify with dry to compressed air.
The method that compressed air is dehumidified is generally lowers the temperature compressed air to make liquid state and vaporous water in this compressed air produce condensation and be separated, thereby reaches effect on moisture extraction.The Patent Application Publication that for example patent No. is CN1120154A a kind of cooled compressed air dehumidification system and device thereof, it is via refrigerant pipe and compressor, a heat exchanger of duplex configuration structure, decompressor and evaporimeter circulation connect and compose freeze cycle, this evaporimeter is configured in the secondary heat exchanger with air outlet slit and entrance, refrigerant pipe is connected with the outer tube of a heat exchanger, form the cold-producing medium mode mobile in the periphery of the inner tube of this heat exchanger, the inner tube of the air outlet slit of above-mentioned secondary heat exchanger and a heat exchanger communicates, from the blown periphery of a heat exchanger of the external air of Air Blast fan.But, above-mentioned technology has only just been carried out shallow cold dehumidifying to compressed gas source, only make compressed-air actuated dew point reach 2～4 ℃ of left and right, do not carry out the deep-freezing dehumidifying, can not realize that low dew-point temperature steam removes to compressed air, make depoint depression to-25 ℃ of left and right, therefore above technology is difficult to applicable the requirement in higher commercial Application.
Certainly, present stage also has the technical method of employing frosting to realize the purpose that dehumidifies, it is generally compression stroke to be carried out after the condensation dehumidifying to be warming up to normal temperature carry out the frosting dehumidifying again, condensation dehumidifying and frosting dehumidifying are relatively independent, and there are following a plurality of problems in existing this technology: the dehumidifying of (1) condensation and the relatively independent efficiency that causes of frosting dehumidifying are low; (2) condensation dehumidifying and frosting dehumidifying adopt respectively independently coolant circulating system, need to configure respectively the equipment such as compressor, and cost is high, and efficiency is low; (3) the condensation dehumidifying stage fails effectively to remove liquid state and the vaporous water in compressed air, and while causing the frosting dehumidifying, frosting degree is large, because the coefficient of heat transfer in the frosting dehumidification process is low, therefore not only affect whole effect on moisture extraction, and efficiency is low; (4) due to frost layer white-out automatically, the operation that therefore just need to be defrosted after every work a period of time, automaticity is low, inefficiency.
Therefore, for solving weak point of the prior art, provide the combined compressed air deep cooling dehumidifier that a kind of efficiency is high, energy consumption is low, cost is low, effect on moisture extraction is good and automaticity is high to seem particularly necessary.
Summary of the invention
The application's purpose is to avoid above-mentioned weak point of the prior art and the combined compressed air deep cooling that a kind of efficiency is high, energy consumption is low, cost is low, effect on moisture extraction is good and automaticity is high dehumidifier is provided.
The application's purpose is achieved through the following technical solutions:
A kind of combined compressed air deep cooling dehumidifier is provided, comprise the evaporimeter that is no less than two, be provided with condenser between two evaporimeters of arbitrary neighborhood, air output along last evaporimeter of compressed air direction of transfer setting is parallel with the frosting device that is no less than two, described frosting device has one at least in the frosting state, remainder is all in defrost state, wait the compressed air dehumidified, flows through and is staggered evaporimeter and condenser flows to the frosting device in the frosting state to last evaporimeter;
Also comprise compressor and fluid reservoir, the output of described compressor is connected with the refrigerant entrance of described condenser, the refrigerant exit of condenser is connected with the input of described fluid reservoir, the output of described fluid reservoir is connected with the refrigerant entrance of evaporimeter through the first throttle valve on the one hand, through the second choke valve, with the refrigerant entrance of frosting device, be connected on the other hand, the refrigerant exit of the refrigerant exit of described evaporimeter and described frosting device is connected with the input of compressor respectively.
Wherein, each frosting device is provided with photoelectric detection switch, and described photoelectric detection switch detects frost thickness in the frosting device in real time, closes the compressed air input of frosting device and open the defrosting operation when frost thickness is greater than preset value.
Wherein, the operating temperature of described evaporimeter is 2 ℃～4 ℃, and the operating temperature of described frosting device is not less than-25 ℃.
Wherein, the below of described evaporimeter is provided with drips the dew collector, on described dew collector, is provided with drain valve.
Wherein, described evaporimeter is finned-tube evaporator, described condenser is fin tube condenser, and refrigerant works in the tube side of described finned-tube evaporator and fin tube condenser, and compressed air to be dehumidified is with horizontal finned-tube evaporator and the fin tube condenser of plunderring of the form of cross-flow.
Wherein, it is curved that the tube side of described finned-tube evaporator and fin tube condenser presents Curved Continuous, the fin of a plurality of screw-types of the outer setting of described finned-tube evaporator and fin tube condenser, zigzag, folding fan-shaped or show window shape.
Wherein, described frosting device quantity is two, and the output of described the second choke valve is connected with triple valve, and two outputs of described triple valve are connected with the refrigerant entrance of two frosting devices respectively.
Wherein, the refrigerant exit of described evaporimeter is connected with heat exchanger, and described heat exchanger is shell-and-tube heat exchanger, double pipe heat exchanger or plate type heat exchanger.
The application's beneficial effect: a kind of combined compressed air deep cooling dehumidifier is provided, compressed air is at first successively by staggered evaporimeter and condenser, be cooled to 2 ℃～4 ℃ condensation remove portion steam by evaporimeter, then by condenser, be warmed to normal temperature, and then enter the dehumidifying of next evaporator condensation, so repeatedly, repeatedly lower the temperature condensation dehumidifying and don't cause frosting as for temperature is too low of compressed air, after the condensation of lowering the temperature through last evaporimeter at compressed air dehumidifies, compressed air enters the frosting device, the frosting device disengages the steam frosting in compressed air, further reduce the compressed air dew point, realize the deep cooling dehumidifying.Compared with prior art: the application has the following advantages: the dehumidifying of (1) condensation is together with frosting dehumidifying organic unity, directly enter the frosting dehumidifying stage after in the end evaporimeter cooling condensation dehumidifying, cut down the number of intermediate links, improved the whole efficiency of dehumidifier; (2) condensation dehumidifying and frosting dehumidifying adopt same coolant circulating system, only need a compressor, have effectively saved cost, have reduced energy consumption; (3) because the condensation dehumidifying stage adopts multi-layer condensation dehumidifying repeatedly, (embodiment supplementary data) makes effective most of steam of removing in compressed air of condensation dehumidifying stage reduce the frosting degree in frosting dehumidifying stage, reduce the defrosting workload, also improved the effect of dehumidifying; (4) a plurality of frosting device alternation; part is in the frosting state; part is in defrost state; the former device of the frosting in defrost state is become to the frosting state after reaching certain thickness Deng the frosting device frost layer of frosting state; thereby the assurance dehumidifier can work long hours continuously and defrost without shutting down; improve the automaticity of dehumidifier, further improved its operating efficiency.
The accompanying drawing explanation
Utilize accompanying drawing to be described further the application, but the embodiment in accompanying drawing does not form any restriction to the application, for those of ordinary skill in the art, under the prerequisite of not paying creative work, can also obtain according to the following drawings other accompanying drawing.
The structural representation of the embodiment that Fig. 1 is a kind of combined compressed air deep cooling of the application dehumidifier.
The structural representation of the coolant circulating system of the embodiment that Fig. 2 is a kind of combined compressed air deep cooling of the application dehumidifier.
In Fig. 1 and Fig. 2, include:
1---evaporimeter, 2---condenser, 3---frosting device, 4---compressor, 5---fluid reservoir, 6---first throttle valve, 7---second choke valve, 8---triple valve.
In Fig. 1, flow path hollow core arrow direction is the compressed air flow direction, and the filled arrows direction is the refrigerant flow direction.
The specific embodiment
With the following Examples the application is further described.
The specific embodiment of a kind of combined compressed air deep cooling of the application dehumidifier, as depicted in figs. 1 and 2, comprise: in a plurality of evaporimeter 1(figure, only show three, in fact can there is more quantity, specifically can be according to the physical condition adjustment), be provided with condenser 2 between two evaporimeters 1 of arbitrary neighborhood, air output along last evaporimeter 1 of compressed air direction of transfer setting is parallel with the frosting device 3 of two, described frosting device 3 has one in the frosting state, another is in defrost state, flow to the frosting device 3 in the frosting state wait flow through staggered evaporimeter 1 and condenser 2 of the compressed air dehumidified to last evaporimeter 1, the operating temperature of described evaporimeter 1 is 2 ℃～4 ℃, and the operating temperature of described frosting device 3 is not less than-25 ℃.
This combined compressed air deep cooling dehumidifier also comprises compressor 4 and fluid reservoir 5, the output of described compressor 4 is connected with the refrigerant entrance of described condenser 2, the refrigerant exit of condenser 2 is connected with the input of described fluid reservoir 5, the output of described fluid reservoir 5 is connected with the refrigerant entrance of evaporimeter 1 through first throttle valve 6 on the one hand, on the other hand successively through the second choke valve 7, after triple valve 8, with the refrigerant entrance of frosting device 3, be connected, two outputs of described triple valve 8 are connected with the refrigerant entrance of two frosting devices 3 respectively, the refrigerant exit of the refrigerant exit of described evaporimeter 1 and described frosting device 3 is connected with the input of compressor 4 respectively, form coolant circulating system with this.
In dehumidifying work, compressed air is at first successively by staggered evaporimeter 1 and condenser 2, be cooled to 2～4 ℃ by evaporimeter 1, temperature is lower than the compressed air dew point, compressed air generation condensation remove portion steam, then leave chill surface and enter condenser 2, be warmed to normal temperature by condenser 2, and then enter the 1 condensation dehumidifying of next evaporimeter, so repeatedly, to make the higher coefficient of heat transfer of maintenance between compressed air and evaporimeter 1 on the one hand, improve heat exchange efficiency and efficiency, in the assurance dew dehumidifying stage, having on the other hand can be by cool-down dehumidification and don't meeting fully because excessive the cooling cause the compressed air frosting.Therefore after the condensation dehumidifying, the steam of compressed air 95% is removed, and water content of compressed air is down to 0.563 g/kg from 20.356 g/kg.Dew point effectively is down to 3～4 ℃ by 25 ℃ of normal temperature.
Compressed air is lowered the temperature condensation dehumidifying through last evaporimeter 1 after, compressed air directly enters frosting device 3, another is in defrost state in the frosting state for 3 one of frosting devices, and compressed air enters the frosting device 3 in the frosting state, frosting device 3 makes compressed-air actuated temperature be down to-25 ℃, steam frosting in compressed air disengages, and further reduces the compressed air dew point, makes its dew point arrive-25 ° of C, water content reaches 0.044g/kg, realizes the deep cooling dehumidifying.In addition, two frosting devices 3 are used alternatingly, one in the frosting state, another one is in defrost state, when frosting device 3 frost thicknesses in the frosting state acquire a certain degree, close this frosting device 3 and make it enter defrost state, open another frosting device 3 simultaneously and make it by defrost state, become the frosting state.
In addition, in coolant circulating system, compressor 4 is by the spirit medium boil down to high-pressure gaseous of evaporimeter 1 and 3 outputs of frosting device, and the refrigerant of this high-pressure gaseous is sent to condenser 2, in condenser 2, release heat is condensed into the refrigerant of low temperature liquid and is stored in fluid reservoir 5, fluid reservoir 5 sends the refrigerant of low temperature liquid to evaporimeter 1 and frosting device 3 by choke valve, make refrigerant evaporation endothermic in evaporimeter 1 and frosting device 3, realize the cooling purpose, refrigerant is converted into the high-temperature low-pressure gaseous state, then be delivered in compressor 4 and again compressed, realize circulation.
Compared with prior art: the application has the following advantages: the dehumidifying of (1) condensation is together with frosting dehumidifying organic unity, in the end after evaporimeter 1 a cooling condensation dehumidifying, directly enter the frosting dehumidifying stage, cut down the number of intermediate links, improved the whole efficiency of dehumidifier; (2) condensation dehumidifying and frosting dehumidifying adopt same coolant circulating system, only need a compressor 4, have effectively saved cost, have reduced energy consumption; (3) because the condensation dehumidifying stage adopts multi-layer condensation dehumidifying repeatedly, (embodiment supplementary data) makes effective most of steam of removing in compressed air of condensation dehumidifying stage reduce the frosting degree in frosting dehumidifying stage, reduced the defrosting workload, also improved the effect of dehumidifying, and the coefficient of heat transfer is low during due to frosting, reduces frosting degree and also can effectively improve system energy efficiency; (4) two frosting device 3 alternations; one in the frosting state; another is in defrost state; the former device of the frosting in defrost state 3 is become to the frosting state after reaching certain thickness Deng frosting device 3 frost layers of frosting state; thereby the assurance dehumidifier can work long hours continuously and defrost without shutting down; improve the automaticity of dehumidifier, further improved its operating efficiency.
Need supplementary notes, in the present embodiment, the quantity of frosting device 3 can be more than two, and principal security has a part at least in the frosting state, and another part gets final product in defrost state; In addition, the operating temperature of frosting device 3 can adopt other temperature lower than 0 ℃, specifically can require change according to required compressed-air actuated dew point, simultaneously owing in the condensation dehumidifying stage, effectively removing most of steam, therefore in the operating temperature of the frosting device 3 of the application's technical scheme, can be down to-40 ℃.
Each frosting device 3 is provided with photoelectric detection switch, and described photoelectric detection switch detects the interior frost thickness of frosting device 3 in real time, closes the compressed air input of frosting device 3 and open the defrosting operation when frost thickness is greater than preset value.Adopt photoelectric detection switch to rotate and detect frost thickness, thereby realize two frosting devices, 3 automatic switchover frosting/defrost state, further improved the automaticity of dehumidifier,
The below of described evaporimeter 1 is provided with drips the dew collector, on described dew collector, is provided with drain valve.Steam drips a dew collector and regularly opens the drain valve draining drops to the dew collector after evaporimeter 1 is received the generation condensation in, avoids the inner ponding of dehumidifier.
Described evaporimeter 1 is finned-tube evaporator 1, described condenser 2 is fin tube condenser 2, refrigerant works in the tube side of described finned-tube evaporator 1 and fin tube condenser 2, and compressed air to be dehumidified is with horizontal finned-tube evaporator 1 and the fin tube condenser 2 of plunderring of the form of cross-flow; It is curved that the tube side of described finned-tube evaporator 1 and fin tube condenser 2 presents Curved Continuous, the fin of a plurality of screw-types of the outer setting of described finned-tube evaporator and fin tube condenser, zigzag, folding fan-shaped or show window shape.Effectively improve the heat exchange efficiency of evaporimeter 1 and condenser 2 with this, improve the whole efficiency of dehumidifier.
The refrigerant exit of described evaporimeter 1 is connected with heat exchanger, and described heat exchanger is shell-and-tube heat exchanger, double pipe heat exchanger or plate type heat exchanger, with the cold and hot amount of this balance coolant circulating system.
Finally should be noted that; above embodiment is only in order to illustrate the application's technical scheme; but not to the restriction of the application's protection domain; although with reference to preferred embodiment, the application has been done to explain; those of ordinary skill in the art is to be understood that; can modify or be equal to replacement the application's technical scheme, and not break away from essence and the scope of present techniques scheme.
Claims (9)
1. a combined compressed air deep cooling dehumidifier, it is characterized in that: comprise the evaporimeter that is no less than two, be provided with condenser between two evaporimeters of arbitrary neighborhood, air output along last evaporimeter of compressed air direction of transfer setting is parallel with the frosting device that is no less than two, described frosting device has one at least in the frosting state, remainder is all in defrost state, wait the compressed air dehumidified, flows through and is staggered evaporimeter and condenser flows to the frosting device in the frosting state to last evaporimeter;
Also comprise compressor and fluid reservoir, the output of described compressor is connected with the refrigerant entrance of described condenser, the refrigerant exit of condenser is connected with the input of described fluid reservoir, the output of described fluid reservoir is connected with the refrigerant entrance of evaporimeter through the first throttle valve on the one hand, through the second choke valve, with the refrigerant entrance of frosting device, be connected on the other hand, the refrigerant exit of the refrigerant exit of described evaporimeter and described frosting device is connected with the input of compressor respectively.
2. a kind of combined compressed air deep cooling dehumidifier as claimed in claim 1, it is characterized in that: each frosting device is provided with photoelectric detection switch, described photoelectric detection switch detects frost thickness in the frosting device in real time, closes the compressed air input of frosting device and open the defrosting operation when frost thickness is greater than preset value.
3. a kind of combined compressed air deep cooling dehumidifier as claimed in claim 1, it is characterized in that: the operating temperature of described evaporimeter is 2 ℃～4 ℃, the operating temperature of described frosting device is not less than-25 ℃.
4. a kind of combined compressed air deep cooling dehumidifier as claimed in claim 1 is characterized in that: the below of described evaporimeter is provided with drips a dew collector, on described dew collector, is provided with drain valve.
5. a kind of combined compressed air deep cooling dehumidifier as claimed in claim 1, it is characterized in that: described evaporimeter is finned-tube evaporator, described condenser is fin tube condenser, refrigerant works in the tube side of described finned-tube evaporator and fin tube condenser, and compressed air to be dehumidified is with horizontal finned-tube evaporator and the fin tube condenser of plunderring of the form of cross-flow.
6. a kind of combined compressed air deep cooling dehumidifier as claimed in claim 5, it is characterized in that: it is curved that the tube side of described finned-tube evaporator and fin tube condenser presents Curved Continuous, the fin of a plurality of screw-types of the outer setting of described finned-tube evaporator and fin tube condenser, zigzag, folding fan-shaped or show window shape.
7. a kind of combined compressed air deep cooling dehumidifier as claimed in claim 1, it is characterized in that: described frosting device quantity is two, the output of described the second choke valve is connected with triple valve, and two outputs of described triple valve are connected with the refrigerant entrance of two frosting devices respectively.
8. a kind of combined compressed air deep cooling dehumidifier as claimed in claim 1, it is characterized in that: the refrigerant exit of described evaporimeter is connected with heat exchanger.
9. a kind of combined compressed air deep cooling dehumidifier as claimed in claim 8, it is characterized in that: described heat exchanger is shell-and-tube heat exchanger, double pipe heat exchanger or plate type heat exchanger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN 201320348154 CN203342632U (en) | 2013-06-18 | 2013-06-18 | Combined compressed air cryogenic dehumidifier |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201320348154 CN203342632U (en) | 2013-06-18 | 2013-06-18 | Combined compressed air cryogenic dehumidifier |
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| CN203342632U true CN203342632U (en) | 2013-12-18 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103316568A (en) * | 2013-06-18 | 2013-09-25 | 东莞理工学院 | Combined type compressed air cryogenic dehumidifier |
| CN104056531A (en) * | 2014-07-16 | 2014-09-24 | 大连保税区鼎盛源国际贸易有限公司 | Energy-saving and environmental-friendly frequency-conversion compressed air freezing dryer system |
| CN106714937A (en) * | 2014-05-29 | 2017-05-24 | 机械工业独资股份公司 | Cooling dryer for compressed air and corresponding method |
| CN107525167A (en) * | 2017-06-30 | 2017-12-29 | 江阴凹帆电子科技有限公司 | A kind of low dew point dehumidification system |
-
2013
- 2013-06-18 CN CN 201320348154 patent/CN203342632U/en not_active Withdrawn - After Issue
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103316568A (en) * | 2013-06-18 | 2013-09-25 | 东莞理工学院 | Combined type compressed air cryogenic dehumidifier |
| CN106714937A (en) * | 2014-05-29 | 2017-05-24 | 机械工业独资股份公司 | Cooling dryer for compressed air and corresponding method |
| US10724750B2 (en) | 2014-05-29 | 2020-07-28 | Officine Meccaniche Industriali S.R.L. Con Unico Socio | Cooling dryer for compressed air and corresponding method |
| CN104056531A (en) * | 2014-07-16 | 2014-09-24 | 大连保税区鼎盛源国际贸易有限公司 | Energy-saving and environmental-friendly frequency-conversion compressed air freezing dryer system |
| CN107525167A (en) * | 2017-06-30 | 2017-12-29 | 江阴凹帆电子科技有限公司 | A kind of low dew point dehumidification system |
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