CN101810935A - Method and device for regenerating liquid desiccant - Google Patents
Method and device for regenerating liquid desiccant Download PDFInfo
- Publication number
- CN101810935A CN101810935A CN 201010140723 CN201010140723A CN101810935A CN 101810935 A CN101810935 A CN 101810935A CN 201010140723 CN201010140723 CN 201010140723 CN 201010140723 A CN201010140723 A CN 201010140723A CN 101810935 A CN101810935 A CN 101810935A
- Authority
- CN
- China
- Prior art keywords
- liquid desiccant
- liquid
- air
- tank container
- regeneration
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Drying Of Gases (AREA)
Abstract
The invention provides a method and a device for regenerating a liquid desiccant, which belongs to the field of air moisture adjustment. The device comprises an external heat source (1), a solution pump (2) and a pot-type container (3), wherein one end of the pot-type container (3) is provided with a regenerated air intake distributor (4) while the other end is connected with a draught fan (5); and a demisting component (6) and an atomizer (7) are arranged in the pot-type container (3). The method for regenerating the liquid desiccant comprises the following steps of: heating the liquid desiccant by the external heat source (1), and then delivering the heated liquid desiccant to the pot-type container (3) by the solution pump (2); atomizing the liquid desiccant by the atomizer (7) to form tiny fog drops; and performing heat and mass exchange on the fog drops and the air entering from the air intake distributor (4) to realize the regeneration of the liquid desiccant. The method and the device for regenerating the liquid desiccant significantly improve the regeneration effect, and the one-way solution process concentration change can be promoted by 1.5 to 3 percent; the heat utilization efficiency is high and reaches over 70 percent; and the device has a simple structure and is convenient to operate and maintain.
Description
Technical field
The invention belongs to the humidity regulation field of air, be specifically related to the renovation process and the device of liquid desiccant in a kind of liquid absorbed moisture removing system, be specially adapted to the liquid absorbed moisture removing system that heat drives.Regenerating unit of the present invention combines with air dehumidifier in the liquid absorbed moisture removing system, realizes the regeneration of dehumidizer weak solution; The common cyclic process that constitutes the dehumidifying (solution dilution) in the dehumidification system and regenerate (carrying dense).
Background technology
Indoor air dehumidification and thermoregulator reasonable disposition are the important channels of building energy-saving.Existing dehumanization method mainly contains mechanical compression type dehumidifying, liquid absorbed moisture removing, solid absorption dehumidifying (as rotary wheel dehumidifying) and film dehumidifying etc.Wherein the liquid absorbed moisture removing drives with low-grade heat, and energy consumption is lower, and has realized that humiture independently controls, and uses extensive day by day.The regeneration unit of liquid absorbed moisture removing system, utilize thermal source with moisture absorption after the solution heating that reduced of concentration, put forward the dense original concentration that returns to, be power consumption unit main in the dehumidification system.
Patent CN1506629A mentions a kind of regenerating unit that adopts filler as the heat and mass unit, and its characteristics are that the air intake place is provided with regenerator, to improve heat utilization efficiency, improves regeneration efficiency, reduces operating cost.But the equipment volume of material filling type revived structure is bigger, and equipment inner structure complexity, thermal utilization effect are not high.
Patent CN101275766A has improved said apparatus, has proposed a dehumidizer regenerative system that has the air liquid absorbed moisture removing of inner low-temperature receiver and have internal heat resource, and the side that promptly dehumidifies has adopted inner coil pipe cooling, and the regeneration side has then adopted inner coil pipe heating.The inside mode of heating of regeneration side has been avoided the cooling that causes because of the consumption of solution reactivation heat, has improved regeneration efficiency.But this improvement does not solve the problems referred to above of material filling type regenerating unit, makes that also the structure of device is complicated more, makes troubles for operation and maintenance.
Patent CN101435608A has proposed to adopt the method for permeable membrane concentration liquid body dehumidizer, to the actified solution side of film heat up, supercharging, opposite side is then reduced pressure or keeps vacuum state, to keep big osmotic pressure.Patent CN201311010Y has proposed to adopt the method for amberplex concentration liquid body dehumidizer, with amberplex optionally actified solution is divided into three parts, wherein both sides are inserted positive and negative electrode respectively, rely on electric energy solution to be carried dense to the effect of effects of ion.These two kinds of common advantages of method are that the driving heat source temperature reduces, and are not subjected to the influence of regeneration air humidity.But the former needs supercharging, decompression and vacuumizing process, operation maintenance inconvenience; The latter need consume the high-grade electric energy.
Patent CN1683056A also is the driving that replaces heat with power, hypergravity dehumidifier and regenerator based on the hypergravity separation method have been proposed, make the attenuation of gas-liquid film up to the rotating speed more than 1000 rev/mins, resistance to mass tranfer reduces, mass tranfer coefficient improves an order of magnitude, significantly improves dehumidifying and regeneration effect.But the rotating shaft of this device also needs the high-grade electric energy to drive.
Patent US5501776 is applied to alcohols liquid desiccant regenerative process with the reextraction technology.In the alcohols liquid desiccant aqueous solution, add strippant, make itself and water form heteroazeotropic system, thereby can make the alcohols dehumidizer reach higher purity.This method only limits to the regeneration of alcohols dehumidizer, and can not handle the halide salt solution dehumidizer.
Liquid dispensing apparatus is a kind of device of gas-liquid mass transfer efficiently, is applied to fields such as drying, crystallization.Patent CN201173662Y and patent CN201374977Y adopt sprayer unit, and evaporation drying contains the liquid material of solid particle; Patent CN101035832A proposes in the modified polycarbonate preparation, utilizes sprayer unit that product is carried out evaporative crystallization and separates.
Summary of the invention
In order to solve the problem that device structure is huge, operation and maintenance are complicated, high-grade energy consumption is many in the existing liquid desiccant regeneration techniques, the regenerating unit of a kind of liquid desiccant provided by the present invention, comprise thermal source, solution pump and tank container, end at tank container is provided with regeneration air air inlet distributor, the other end is connected with air-introduced machine, is provided with demist parts, atomizer in the inside of tank container.Wherein the demist parts can adopt at air stream outlet air-flow baffling parts are set, or adopt structured packing making or dumped packing to fill.Atomizer can be pressure nozzle or air flow type jet nozzle.
The regenerating unit of this liquid desiccant can adopt reverse-flow structure or downflow type structure.When adopting reverse-flow structure, the air inlet distributor is arranged on the bottom or the side lower part of tank container, and exhaust is drawn by the tank container top.When adopting the downflow type structure, the air inlet distributor is arranged on the top or the upper lateral part of tank container, and exhaust is turned back by liquid level top, tank container bottom, and interlayer to the tank container is drawn by the interlayer top at last.
The renovation process of liquid desiccant provided by the present invention is for using the regenerating unit of aforesaid liquid dehumidizer, with the liquid particle of liquid desiccant atomizing becoming high-specific surface area, the huge mass-and heat-transfer area that utilizes the atomization of liquid to have rapidly, is efficiently realized the regeneration of liquid desiccant.The step of this process is as follows:
1) with the liquid desiccant of pending regeneration through the external heat source heating after, be sent to atomizer in the tank container by the liquid pump;
2) atomizer carries out nebulisation operation to liquid desiccant, and it is broken into the inner space that mist droplet is sprayed onto tank container;
3) air enters tank container by the air inlet distributor, and carries out gas-liquid caloic exchange with liquid desiccant after the atomizing;
4) air after the exchange is discharged by the air-introduced machine of the tank container other end;
5) liquid desiccant after the regeneration is collected in the liquid storage space;
6) the dehumidizer fine droplet of being taken away by air-flow is blocked recovery in the demist parts.
The renovation process of liquid desiccant provided by the present invention is applicable to following liquid desiccant: 1) the halogen aqueous solution comprises: lithium chloride, lithium bromide, calcium chloride, zinc chloride; 2) the complex salt aqueous solution of forming by two kinds or above above-mentioned halogen; 3) polyatomic alcohol water solution comprises: ethylene glycol, glycerine, triethylene glycol; 4) the compound alcohol solution of forming by two kinds or above above-mentioned alcohol.
In the renovation process of liquid desiccant provided by the present invention, in step 2) the pressure limit of nebulisation operation at 0.2MPa to 1.2MPa; The average particle size range that liquid desiccant is fractured into small liquid particles is that 40 μ m are to 600 μ m.The liquid-gas ratio that carries out the exchange of gas-liquid caloic in the step 3) is 0.7～2.0.
The beneficial effect that the present invention has:
The regenerative process of liquids in general dehumidizer is carried out heat exchange and mass transfer at filling surface.Compared with prior art, the regenerating unit of the liquid-absorbant that the present invention proposes makes the mass-and heat-transfer specific area of liquid dehumidifying solution increase, and makes regenerative process speed significantly accelerate.Liquid desiccant obviously increases by the variation of the one way heat and mass variable (for example temperature and concentration) of regenerator.Concrete effect is as follows:
1, this device actified solution one way concentration has improved 1.5%～3%.The raising of regenerative process mass transfer effect makes the volume of reclaim equiment processed in units amount reduce, and manufacturing cost descends.
2,, make more liquid sensible heats be used to solution and regenerate owing to fluid temperature in the limited travel of drippage changes obviously.When the solution feed temperature is 75 ℃, when operating pressure was 0.65MPa, power was the thermal source of 100kW, and the system regeneration ability is 115.8kg/h.Effective utilization of heat causes the regenerative process energy consumption to descend, and the heat utilization efficiency of regenerative process can reach 74.8%.This will make the also corresponding decline of dehumidifying energy consumption of whole dehumidification system.
3, relatively drench the regenerator structure of the material filling type of cloth liquid with other, the filler that the present invention proposes to have replaced almost being full of device with a small amount of atomizer with (or) heating tube, make the internal structure of regenerator obviously simplify.Need not consider the heat-transfer effect and the etching problem of heating tube, need not frequently change equipment such as filler, the regeneration operation of being convenient to solution is safeguarded with device.
Description of drawings
Fig. 1 is the embodiment schematic flow sheet of counter-current operation of the present invention;
Fig. 2 is the embodiment schematic flow sheet of following current operation of the present invention;
Among the figure: the 1-thermal source; The 2-solution pump; 3-main body tank container; 4-air inlet distributor; The 5-air-introduced machine; 6-demist parts; The 7-atomizer; Liquid storage space, 8-bottom.
The specific embodiment
Embodiment flow process shown in the accompanying drawing 1 is the flow process of reflux type.The device primary structure of present embodiment is a tank container (3), and draw ratio is 2: 1, and inner top is provided with demist parts (6) and atomizer (7) from top to bottom successively; The stage casing is liquid desiccant atomizing and gas-liquid attaching space, and the bottom is liquid storage space (8); Its underpart also is provided with air inlet distributor (4).The demist parts have adopted regular metal packing to fill.
The liquid desiccant that present embodiment is selected for use is the aqueous solution of lithium chloride, and the regeneration inlet concentration is 32.65%.Atomizer is a pressure nozzle, and when operating pressure is 0.65MPa, the operation liquid-gas ratio is 1.2 o'clock, and this atomizer can become the liquid desiccant fragmentation average grain diameter and be about liquid particles about 60 μ m.Solution is transported to atomizer (7) by solution pump (2) and atomizes after external heat source (1) is heated to 75 ℃, drop after the atomizing and regeneration air are realized heat and mass in tank container (3) middle part counter current contacting.By air-introduced machine (5), the humid air after the regeneration enters atmosphere by tank container (3) top, and the solution after the regeneration can temporarily be stored in liquid storage space (8), bottom, carries back the dehumidifying side then.
Utilize the described device of present embodiment, under the aforesaid operations condition, when the solution-treated amount is 3.6m
3During/h, solution concentration has promoted 2.68%, and the regeneration amount is 115.8kg/h, has improved about 50% respectively with respect to prior art.The heating power of required thermal source is 100kW, and the latent heat load of regeneration institute transpiring moisture is 74.6kW, and system of the present invention reaches 74.6% to the utilization rate of regeneration thermal source.Embodiment 2
Embodiment flow process shown in the accompanying drawing 2 is the flow process of concurrent.The device primary structure of present embodiment is a tank container (3), and its draw ratio is 2: 1, and tank container wall design interlayer is as the regeneration air exit passageway.Inner top is atomizer (7); The stage casing is liquid desiccant atomizing and gas-liquid attaching space, and the bottom is liquid storage space (8).The liquid desiccant of pending regeneration through external heat source (1) heating after, be sent to atomizer (7) in the tank container (3) by solution pump (2).Air inlet distributor (4) with axially become 30 ° of angles, air-flow enters along bucket wall tangential direction, carry out after caloic exchanges inner contact of tank container (3) with liquid desiccant, turn back to tank container (3) interlayer all around by tank container (3) bottom liquid level top, rise along interlayer, by air-introduced machine (5) discharge system.The tank container interlayer is provided with demist parts (6), and the demist parts have adopted regular metal packing to fill.
The flow process of concurrent has following characteristics with respect to reverse-flow flow process: 1) structure is simpler; 2) air inlet is adopted with axially becoming the tangential admission mode at 30 ° of angles has increased the stroke of air-flow in regenerator, thereby has increased gas-liquid contact time, so that mass transfer is more abundant; 3) air-flow flows along container inner wall is spiral, can effectively slow down wall effect; 4) flow process of downflow type can reduce the mist loss.
Claims (8)
1. the regenerating unit of a liquid desiccant, it is characterized in that this device comprises thermal source (1), solution pump (2) and tank container (3), end at tank container (3) is provided with regeneration air air inlet distributor (4), the other end is connected with air-introduced machine (5), is provided with demist parts (6), atomizer (7) in the inside of tank container (3).
2. according to the regenerating unit of the described liquid desiccant of claim 1, it is characterized in that described demist parts (6) can adopt at air stream outlet air-flow baffling parts are set, or adopt structured packing making or dumped packing to fill.
3. the regenerating unit of liquid desiccant according to claim 1 is characterized in that described atomizer (7) can be pressure nozzle or air flow type jet nozzle.
4. the regenerating unit of liquid desiccant according to claim 1, this device of its feature can adopt reverse-flow structure or downflow type structure; When adopting reverse-flow structure, air inlet distributor (4) is arranged on the bottom or the side lower part of tank container (3), and exhaust is drawn by tank container (3) top; When adopting the downflow type structure, air inlet distributor (4) is arranged on the top or the upper lateral part of tank container (3), and exhaust is turned back by liquid level top, tank container (3) bottom, to tank container (3) interlayer all around, is drawn by the interlayer top at last.
5. the renovation process of a liquid desiccant, it is characterized in that using the regenerating unit of the described liquid desiccant of claim 1, with a large amount of liquid particles of liquid desiccant atomizing becoming, the huge specific area that these fine particles are had, for the regeneration of liquid desiccant provides the good condition of mass-and heat-transfer, the concrete steps of its process are as follows:
1) with the liquid desiccant of pending regeneration through external heat source (1) heating after, be sent to atomizer (7) in the tank container (3) by liquid pump (2);
2) atomizer (7) carries out nebulisation operation to liquid desiccant, and it is broken into the inner space that mist droplet is sprayed onto tank container (3);
3) air enters tank container (3) by air inlet distributor (4), and carries out gas-liquid caloic exchange with liquid desiccant after the atomizing;
4) air after the exchange is discharged by the air-introduced machine (5) of tank container (3) other end;
5) liquid desiccant after the regeneration is collected in liquid storage space (8);
6) the dehumidizer fine droplet of being taken away by air-flow is blocked recovery in demist parts (6).
6. the renovation process of liquid desiccant according to claim 5, it is characterized in that the described liquid desiccant of step 1) can for: 1) the halogen aqueous solution comprises: lithium chloride, lithium bromide, calcium chloride, zinc chloride; 2) the complex salt aqueous solution of forming by two kinds or above above-mentioned halogen; 3) polyatomic alcohol water solution comprises: ethylene glycol, glycerine, triethylene glycol; 4) the compound alcohol solution of forming by two kinds or above above-mentioned alcohol.
7. the renovation process of liquid desiccant according to claim 5 is characterized in that step 2) pressure limit of described nebulisation operation at 0.2MPa to 1.2MPa; The average particle size range that liquid desiccant is fractured into small liquid particles is that 40 μ m are to 600 μ m.
8. the renovation process of liquid desiccant according to claim 5 is characterized in that the liquid-gas ratio of the described gas-liquid caloic exchange of step 3) is 0.7～2.0.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010140723 CN101810935A (en) | 2010-04-02 | 2010-04-02 | Method and device for regenerating liquid desiccant |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010140723 CN101810935A (en) | 2010-04-02 | 2010-04-02 | Method and device for regenerating liquid desiccant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101810935A true CN101810935A (en) | 2010-08-25 |
Family
ID=42618389
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010140723 Pending CN101810935A (en) | 2010-04-02 | 2010-04-02 | Method and device for regenerating liquid desiccant |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101810935A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102225298A (en) * | 2011-04-26 | 2011-10-26 | 重庆大学 | Rotary type absorbing dehumidifying system containing porous medium concentrated saline solution |
| CN103877835A (en) * | 2014-02-11 | 2014-06-25 | 北京思践通科技发展有限公司 | Regenerative apparatus and regenerative method as well as dehydrating system and dehydrating method |
| CN108105795A (en) * | 2017-07-10 | 2018-06-01 | 昊姆（上海）节能科技有限公司 | Compression, absorption heat pump coupling fume treatment auxiliary |
| CN110318232A (en) * | 2018-03-30 | 2019-10-11 | 浙江三花智能控制股份有限公司 | Clothes airing machine |
| CN111001263A (en) * | 2019-12-10 | 2020-04-14 | 北京化工大学 | Method for strengthening rotating wheel dehumidification technology by using supergravity reactor |
| CN111971109A (en) * | 2018-04-16 | 2020-11-20 | 夏普株式会社 | Air conditioner |
| CN112689732A (en) * | 2018-09-18 | 2021-04-20 | 夏普株式会社 | Humidity control system |
| TWI828651B (en) * | 2018-02-07 | 2024-01-11 | 美商帕洛阿爾托研究中心公司 | Electrochemical desalination system |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101033874A (en) * | 2006-03-07 | 2007-09-12 | 北京化工大学 | Air conditioning method combining solution absorbed moisture removing with compression refrigeration cycle |
-
2010
- 2010-04-02 CN CN 201010140723 patent/CN101810935A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101033874A (en) * | 2006-03-07 | 2007-09-12 | 北京化工大学 | Air conditioning method combining solution absorbed moisture removing with compression refrigeration cycle |
Non-Patent Citations (2)
| Title |
|---|
| 《北京化工大学学报》 20081231 田龙舟等 LiCl溶液吸收除湿器的实验与模拟 12-16 1-8 第35卷, 第6期 2 * |
| 《北京化工大学硕士论文》 20081010 田龙舟 吸收式除湿工艺研究 第2.4.1、4.1.1-4.1.2节及图2-7与图4-1 1-8 , 2 * |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102225298A (en) * | 2011-04-26 | 2011-10-26 | 重庆大学 | Rotary type absorbing dehumidifying system containing porous medium concentrated saline solution |
| CN103877835A (en) * | 2014-02-11 | 2014-06-25 | 北京思践通科技发展有限公司 | Regenerative apparatus and regenerative method as well as dehydrating system and dehydrating method |
| CN103877835B (en) * | 2014-02-11 | 2016-07-13 | 北京思践通科技发展有限公司 | A kind of regenerating unit and renovation process and dewatering system and dewatering |
| CN108105795A (en) * | 2017-07-10 | 2018-06-01 | 昊姆（上海）节能科技有限公司 | Compression, absorption heat pump coupling fume treatment auxiliary |
| TWI828651B (en) * | 2018-02-07 | 2024-01-11 | 美商帕洛阿爾托研究中心公司 | Electrochemical desalination system |
| CN110318232A (en) * | 2018-03-30 | 2019-10-11 | 浙江三花智能控制股份有限公司 | Clothes airing machine |
| CN110318232B (en) * | 2018-03-30 | 2021-05-28 | 浙江三花智能控制股份有限公司 | Clothes airing machine |
| CN111971109A (en) * | 2018-04-16 | 2020-11-20 | 夏普株式会社 | Air conditioner |
| CN112689732A (en) * | 2018-09-18 | 2021-04-20 | 夏普株式会社 | Humidity control system |
| CN111001263A (en) * | 2019-12-10 | 2020-04-14 | 北京化工大学 | Method for strengthening rotating wheel dehumidification technology by using supergravity reactor |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101810935A (en) | Method and device for regenerating liquid desiccant | |
| CN105420750B (en) | A kind of water electrolysis hydrogen production gas compression recuperation of heat utilizes system and method | |
| CN201706611U (en) | New wind energy-saving heat pump rotating wheel dehumidifier | |
| CN106564979A (en) | Integrated refrigeration, dehumidification and pure water preparation system using solar energy or low-temperature heat source | |
| CN107261754A (en) | VOCs waste gas recovery processing method and processing devices | |
| CN101703869B (en) | New method and device for recovering organic solvent from waste gas | |
| CN106039929A (en) | Circular demercuration and mercury recycling system and method for renewable adsorbent | |
| CN104587799A (en) | Device and method for processing complex organic waste gas components and recycling resources | |
| CN102302888A (en) | Organic waste gas recycling device with functions of saving energy and prolonging service life of absorbing agent | |
| CN102674491B (en) | Seawater desalination device | |
| CN107120747A (en) | The anti-defrosting system of net for air-source heat pump units dry-air blast and its method of work | |
| CN102380289B (en) | Alcohol steam recovery device | |
| CN101816881B (en) | Novel ventilation energy-saving heat pump rotary dehumidifier | |
| CN1325144C (en) | Super gravity liquid absorption dehumidifying and regenerating system | |
| CN102679468B (en) | Regeneration system of dehumidifying solution for moist air | |
| CN103961997A (en) | Process for recycling exhaust gas from ammonium metavanadate roasting furnace | |
| CN103277854A (en) | Evaporative cooling dehumidification air conditioner unit with waste heat recovery function and for air compressor | |
| CN104315624A (en) | Air-assisted atomization solution dehumidification air-conditioning system | |
| CN101518706B (en) | Adsorption device and adsorbent regeneration method | |
| CN202173868U (en) | Organic waste gas recovery device saving energy and prolonging service life of sorbent | |
| CN111203286A (en) | Preparation device and method of catalyst for producing vinyl acetate by acetylene method | |
| CN208082155U (en) | Heat recovery polymer tubular membrane drying system | |
| CN206669915U (en) | Compress boiling type regeneration solar energy dehumidification system | |
| CN207899206U (en) | A kind of organic waste gas treatment system | |
| CN207035357U (en) | The anti-defrosting system of net for air-source heat pump units dry-air blast |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20100825 |