CN111089352A - Fresh air processing system and method - Google Patents
Fresh air processing system and method Download PDFInfo
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- CN111089352A CN111089352A CN201811244547.0A CN201811244547A CN111089352A CN 111089352 A CN111089352 A CN 111089352A CN 201811244547 A CN201811244547 A CN 201811244547A CN 111089352 A CN111089352 A CN 111089352A
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- fresh air
- heat exchanger
- dehumidifying
- dehumidification
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
- F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
- F24F2003/1458—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification using regenerators
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Drying Of Gases (AREA)
- Central Air Conditioning (AREA)
Abstract
The invention provides a fresh air processing system and a method, which comprises the following steps: the front section of the fresh air channel is divided into two chambers in the width direction, the front end of each chamber is provided with a fan, each chamber is internally provided with a group of dehumidification heat exchangers, the rear section of the fresh air channel is internally provided with a surface air cooler, and the tail end of the fresh air channel is provided with an air outlet fan; the dehumidification heat exchangers are communicated with the heat source and the cold source through circulating pipelines, and each circulating pipeline is provided with a control valve; the dehumidification heat exchanger comprises a heat exchanger body and a dehumidifying agent arranged on the outer surface of the heat exchanger body; and the surface air cooler is circularly connected with a freezing water source outside the fresh air channel through a water pipe. The invention has low energy consumption for the pretreatment of fresh air.
Description
Technical Field
The invention relates to the technical field of fresh air processing of air conditioners, in particular to a fresh air processing system and a fresh air processing method.
Background
The dehumidifying agent is mainly used for fresh air treatment, including liquid dehumidifying, solid dehumidifying and dehumidifying by a dehumidifying heat exchanger, and the aim of treating fresh air to lower moisture content (less than 8g/kg dry air), namely lower than that (generally about 10g/kg dry air) which can be treated by conventional freezing dehumidifying is pursued, but higher regeneration temperature (more than 100 ℃) or lower cooling temperature (7-15 ℃) is often required. In some occasions, such as cigarette workshops, a large amount of low-temperature heat sources (lower than 50 ℃) are provided, and the humidity after fresh air treatment does not need to have lower moisture content, generally about 10-12g/kg of dry air, so that a low-power-consumption fresh air treatment system and method are needed, and the regeneration of a dehumidifying agent can be met without using higher proliferation temperature.
Disclosure of Invention
In view of the above disadvantages of the prior art, the present invention provides a fresh air processing system and method, which are used to solve the problem of high energy consumption in fresh air processing in the prior art.
To achieve the above and other related objects, the present invention provides a fresh air processing system, comprising:
the front section of the fresh air channel is divided into two chambers in the width direction, the front end of each chamber is provided with a fan, each chamber is internally provided with a group of dehumidification heat exchangers, the rear section of the fresh air channel is internally provided with a surface air cooler, and the tail end of the fresh air channel is provided with an air outlet fan;
the dehumidification heat exchangers are communicated with the heat source and the cold source through circulating pipelines, and each circulating pipeline is provided with a control valve; a dehumidifying agent is arranged on the surface of the dehumidifying heat exchanger; and the surface air cooler is circularly connected with a freezing water source outside the fresh air channel through a water pipe.
Preferably, the heat source is low temperature hot water below 50 ℃.
Preferably, the cold source is cooling water which is prepared by cooling by a cooling tower.
Preferably, the dehumidifying heat exchanger comprises a heat exchanger body, the dehumidifying agent is arranged on the outer surface of the heat exchanger body, and the heat exchanger body is a tube-fin heat exchanger.
The invention also provides a fresh air processing method, which is implemented by adopting the fresh air processing system and comprises the following steps: fans in the two chambers are started alternately, the dehumidifying heat exchanger positioned in the chamber where the fans are started is used for dehumidifying, the dehumidifying heat exchanger used for dehumidifying is communicated with the cold source, and the other dehumidifying heat exchanger is communicated with the heat source; the fresh air is divided into two paths after being dehumidified by the dehumidifying heat exchanger used for dehumidification, one path of fresh air is sent out by the air outlet machine after being dehumidified by the surface air cooler, and the other path of fresh air is discharged by the fan after being dehumidified by the other dehumidifying heat exchanger, so that a dehumidifying agent on the other set of dehumidifying heat exchanger is regenerated.
Preferably, the starting conditions of the fans in the two rooms are as follows: and if the dehumidifying agent on the dehumidifying heat exchanger needs to be regenerated, starting the corresponding indoor fan.
As described above, the fresh air processing system and method of the present invention have the following beneficial effects: the adoption is cut apart into two rooms in the new trend passageway, dehumidification heat exchanger is all installed in two rooms, and the dehumidification heat exchanger of one of them room lets in the cold source and is used as the dehumidification at during operation, and the dehumidification heat exchanger of another room can let in the heat source, makes the new trend after the dehumidification pass through, finally makes the desiccant regeneration, and this in-process heat source can be low temperature hot water, if be less than 50 degrees centigrade water, and the heat source temperature is not high promptly, makes the new trend in-process, and the regeneration of desiccant need not the high temperature heat source, reduces the energy consumption.
Drawings
FIG. 1 is a schematic view of a fresh air handling system according to the present invention.
FIG. 2 is a state diagram of the fresh air flow direction of the fresh air processing system of the present invention.
Fig. 3 is another state diagram of the fresh air flow direction of the fresh air processing system of the present invention.
Description of the element reference numerals
10. 11 blower fan
12 air outlet machine
13. 14 dehumidifying heat exchanger
131. 141 desiccant
15 surface air cooler
16 fresh air channel
17 baffle plate
18 circulation pipeline
19 heat source
20 Cold source
21. 22, 23, 24, 25, 26, control valve
27、28
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
Please refer to fig. 1 to 3. It should be understood that the structures, ratios, sizes, and the like shown in the drawings are only used for matching the disclosure of the present disclosure, and are not used for limiting the conditions that the present disclosure can be implemented, so that the present disclosure is not limited to the technical essence, and any structural modifications, ratio changes, or size adjustments should still fall within the scope of the present disclosure without affecting the efficacy and the achievable purpose of the present disclosure. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
As shown in fig. 1, the present invention provides a fresh air processing system, which includes:
the front section of the fresh air channel 16 is divided into two chambers in the width direction, the fresh air channel is divided into a chamber A and a chamber B through a partition plate 17 in the embodiment, the front end of each chamber is provided with a fan 10 and a fan 11, a group of dehumidifying heat exchangers 13 and 14 is arranged in each chamber, the rear section of the fresh air channel is internally provided with a surface air cooler 15, and the tail end of the fresh air channel is provided with an air outlet fan 12;
the heat source 19 and the cold source 20 are arranged outside the fresh air channel, the heat source 19 is a low-temperature heat source with the temperature lower than 50 ℃, each group of dehumidification heat exchangers 13 and 14 are communicated with the heat source 19 and the cold source 20 through circulating pipelines 18, and each circulating pipeline is provided with a control valve; the dehumidifying heat exchanger 13, 14 comprises a heat exchanger body and a dehumidifying agent 131, 141 arranged on the outer surface of the heat exchanger body; and the surface air cooler 15 is circularly connected with a freezing water source outside the fresh air channel through a water pipe.
According to the invention, the front section of the fresh air channel 16 is divided into two chambers, the chamber A and the chamber B can dehumidify fresh air alternately, so that the alternate regeneration of the dehumidifying agents on the two sets of dehumidifying heat exchangers is realized, a high-temperature heat source is not needed in the regeneration process, the heat source can be obtained by adopting a waste heat recovery mode, and the overall power consumption of fresh air pretreatment is reduced; in addition, when the dehumidification heat exchanger is used for dehumidification, a cold source of the dehumidification heat exchanger can be obtained in a recovery mode.
The heat source is low-temperature hot water with the temperature lower than 50 ℃, and can be obtained by recovering waste heat in the process treatment process.
The cold source is cooling water which is prepared by cooling tap water through a cooling tower by building exhaust air.
The heat exchanger body is a tube fin type heat exchanger, which can also be a plate type heat exchanger or a tube row type heat exchanger, liquid such as water is in the tube, and air is outside the tube.
The invention also provides a fresh air processing method, which is implemented by adopting the fresh air processing system and comprises the following steps: fans 10 and 11 in the two chambers are started alternately, and dehumidifying heat exchangers 13 and 14 in the chambers with the started fans are used for dehumidifying, the dehumidifying heat exchanger used for dehumidifying is communicated with the cold source 19, and the other dehumidifying heat exchanger is communicated with the heat source 20; the fresh air F is divided into two paths after being dehumidified by the dehumidifying heat exchanger used for dehumidification, one path of the fresh air is sent out by the air outlet machine 12 after being dehumidified by the surface air cooler 15, and the other path of the fresh air is discharged by the fan after passing through the other dehumidifying heat exchanger, so that a dehumidifying agent on the other set of dehumidifying heat exchanger is regenerated.
For better to the new trend preliminary treatment, the fan starting condition in two rooms in this embodiment is: and if the dehumidifying agent on the dehumidifying heat exchanger needs to be regenerated, starting the corresponding indoor fan.
The following is a detailed description of the two chambers as being used for dehumidification, respectively:
fig. 2 shows that the dehumidifying heat exchanger 13 in the chamber a is used for dehumidification, the control valves 21 and 23 on the circulating pipeline 18 are closed, the control valves 22 and 24 are opened, that is, the dehumidifying heat exchanger is communicated with the cold source 20 and is disconnected from the heat source 19, that is, the cooling water prepared by the cooling tower is introduced into the dehumidifying process of the dehumidifying heat exchanger 13. The cooling water is prepared by building exhaust air through a cooling tower or by utilizing outdoor air. The dehumidification heat exchanger 14 in the chamber B, the control valves 26 and 27 on the circulation pipeline 18 connected with the dehumidification heat exchanger are closed, and the control valves 25 and 28 are opened, namely, the dehumidification heat exchanger 14 is disconnected from the cold source 20 and communicated with the hot source 19. Fan 10 in room A stops, fan 11 in room B starts, new trend F passes through dehumidification heat exchanger 13, its vapor is adsorbed by desiccant 131, the new trend is dehumidified in advance, become state F1, the wind of state F1 divides into two ways, it is further dehumidified through surface cooler 15 all the way, become state F2, send required place by air-out machine 12 as the product air, another way gets into room B and passes through dehumidification heat exchanger 14, dehumidification heat exchanger 14 lets in low temperature hot water and is in desiccant regeneration process. The low-temperature hot water is obtained by heat recovery in a process treatment process, and the temperature is lower than 50 ℃. After the desiccant 141 of the dehumidifying heat exchanger is regenerated, the wind of the state F1 is discharged to the state E.
When the adsorption capacity of the desiccant 131 on the dehumidifying heat exchanger 13 in the chamber a is decreased, the state is switched to the state of fig. 3, in which the desiccant 131 of the dehumidifying heat exchanger 13 is regenerated and the dehumidifying heat exchanger 14 in the chamber B dehumidifies. The switching is realized by a fan and a control valve, namely the fan 10 is started, the fan 11 is stopped, the control valves 21 and 23 are started, the control valves 22 and 24 are closed, the dehumidification heat exchanger 13 is disconnected from the cold source 19 and communicated with the heat source 20, namely low-temperature hot water is introduced in the regeneration process of the dehumidification heat exchanger 13. The control valves 26 and 27 are opened, the control valves 25 and 28 are closed, the dehumidification heat exchanger 14 is communicated with the cold source 19 and disconnected with the heat source 20, and cooling water prepared by a cooling tower is introduced in the dehumidification process of the dehumidification heat exchanger 14. The fresh air F passes through the dehumidifying heat exchanger 14, the water vapor of the fresh air is absorbed by the dehumidifying agent 141, the fresh air is pre-dehumidified and is changed into a state F1, the air in the state F1 is divided into two paths, one path of the air is further dehumidified by the surface air cooler 15 and is changed into a state F2, and the air is taken as product air and is sent to a required place by the air outlet machine 12; the other path enters the chamber A and passes through the dehumidifying heat exchanger 13, the dehumidifying heat exchanger 13 is filled with low-temperature hot water to be in a dehumidifying agent regeneration process, after the dehumidifying agent 131 of the dehumidifying heat exchanger is regenerated, the wind in the state F1 is changed into the wind in the state E to be discharged.
Examples of the present invention
It is assumed that,
the heat source is hot water with the temperature of 45-50 ℃,
the cold source is cooling water (prepared by indoor exhaust air) with the temperature of 23-28 ℃,
the temperature of the frozen water is 10-15 ℃,
the fresh air temperature is 35 ℃ of the dry-bulb temperature and the relative humidity of the fresh air is 60%
The corresponding parameters of the state points in fig. 2 and 3 are as follows:
the air volume of the exhaust air E is about 22.6% of that of the fresh air F, and the air volume of the state F1 is about 77.4% of that of the fresh air.
The total fresh air load is: 90.2-43.4-56.8 kJ/kg dry air,
the fresh air precooling load is as follows: 90.2-70.7 is 19.5kJ/kg dry air,
the proportion of precooling to reduce the fresh air load is as follows: 19.5/56.8-34.3%.
In summary, the fresh air processing system and the method of the invention can use low-temperature hot water as a heat source to regenerate the desiccant, and use water of the cooling tower as a cold source to cool the dehumidification process, thereby realizing the pre-dehumidification of fresh air, and then further dehumidifying by using chilled water; the method has the advantages of energy conservation, economy, simple and reliable system and the like by utilizing waste heat with lower temperature widely existing in the industrial field but not available to pretreat fresh air. Therefore, the invention effectively overcomes various defects in the prior art and has high industrial utilization value.
The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (6)
1. A fresh air handling system, comprising:
the front section of the fresh air channel is divided into two chambers in the width direction, the front end of each chamber is provided with a fan, each chamber is internally provided with a group of dehumidification heat exchangers, the rear section of the fresh air channel is internally provided with a surface air cooler, and the tail end of the fresh air channel is provided with an air outlet fan;
the dehumidification heat exchangers are communicated with the heat source and the cold source through circulating pipelines, and each circulating pipeline is provided with a control valve; a dehumidifying agent is arranged on the surface of the dehumidifying heat exchanger;
and the surface air cooler is circularly connected with a freezing water source outside the fresh air channel through a water pipe.
2. The fresh air handling system of claim 1 wherein: the heat source is low-temperature hot water with the temperature lower than 50 ℃.
3. The fresh air handling system of claim 1 wherein: the cold source is cooling water which is made by cooling of a cooling tower.
4. The fresh air handling system of claim 1 wherein: the dehumidification heat exchanger is a tube-fin heat exchanger.
5. A fresh air processing method is characterized in that: the fresh air processing method is implemented by the fresh air processing system of claim 1, and comprises the following steps: fans in the two chambers are started alternately, the dehumidifying heat exchanger positioned in the chamber where the fans are started is used for dehumidifying, the dehumidifying heat exchanger used for dehumidifying is communicated with the cold source, and the other dehumidifying heat exchanger is communicated with the heat source; the fresh air is divided into two paths after being dehumidified by the dehumidifying heat exchanger used for dehumidification, one path of fresh air is sent out by the air outlet machine after being dehumidified by the surface air cooler, and the other path of fresh air is discharged by the fan after being dehumidified by the other dehumidifying heat exchanger, so that a dehumidifying agent on the other set of dehumidifying heat exchanger is regenerated.
6. The fresh air processing method according to claim 5, wherein: the starting conditions of the fans in the two chambers are as follows: and if the dehumidifying agent on the dehumidifying heat exchanger needs to be regenerated, starting the corresponding indoor fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811244547.0A CN111089352A (en) | 2018-10-24 | 2018-10-24 | Fresh air processing system and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811244547.0A CN111089352A (en) | 2018-10-24 | 2018-10-24 | Fresh air processing system and method |
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| CN111089352A true CN111089352A (en) | 2020-05-01 |
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| CN201811244547.0A Pending CN111089352A (en) | 2018-10-24 | 2018-10-24 | Fresh air processing system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113669806A (en) * | 2021-08-31 | 2021-11-19 | 珠海格莱克科技有限公司 | Self-adaptive control method for finned tube type coating dehumidification unit |
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| CN1896616A (en) * | 2006-06-15 | 2007-01-17 | 清华大学 | Air treater set with moisture-absorbing solution as circulation work medium and driven by hot pump |
| JP2008111649A (en) * | 2006-10-05 | 2008-05-15 | Fuji Electric Retail Systems Co Ltd | Dehumidifying air conditioner |
| CN202581587U (en) * | 2012-04-27 | 2012-12-05 | 东莞市国祥空调设备有限公司 | Low-humidity high-temperature regenerating energy-saving dehumidification system |
| CN104006463A (en) * | 2014-06-04 | 2014-08-27 | 多乐空气处理设备（苏州）有限公司 | Rotary-wheel type heat recovery air-handling unit and air-handling method thereof |
| CN105757836A (en) * | 2016-03-28 | 2016-07-13 | 上海交通大学 | Dehumidification heat exchanger based regeneration dehumidification heat pump system and running method therefor |
| CN207455784U (en) * | 2017-11-14 | 2018-06-05 | 无锡市轮特空气除湿设备有限公司 | A kind of low dew-point dehumidifying |
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2018
- 2018-10-24 CN CN201811244547.0A patent/CN111089352A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10205817A (en) * | 1997-01-21 | 1998-08-04 | Ebara Corp | Air conditioner and air conditioning system |
| CN1896616A (en) * | 2006-06-15 | 2007-01-17 | 清华大学 | Air treater set with moisture-absorbing solution as circulation work medium and driven by hot pump |
| JP2008111649A (en) * | 2006-10-05 | 2008-05-15 | Fuji Electric Retail Systems Co Ltd | Dehumidifying air conditioner |
| CN202581587U (en) * | 2012-04-27 | 2012-12-05 | 东莞市国祥空调设备有限公司 | Low-humidity high-temperature regenerating energy-saving dehumidification system |
| CN104006463A (en) * | 2014-06-04 | 2014-08-27 | 多乐空气处理设备（苏州）有限公司 | Rotary-wheel type heat recovery air-handling unit and air-handling method thereof |
| CN105757836A (en) * | 2016-03-28 | 2016-07-13 | 上海交通大学 | Dehumidification heat exchanger based regeneration dehumidification heat pump system and running method therefor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113669806A (en) * | 2021-08-31 | 2021-11-19 | 珠海格莱克科技有限公司 | Self-adaptive control method for finned tube type coating dehumidification unit |
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