CN111001263A - Method for strengthening rotating wheel dehumidification technology by using supergravity reactor - Google Patents
Method for strengthening rotating wheel dehumidification technology by using supergravity reactor Download PDFInfo
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- CN111001263A CN111001263A CN201911258673.6A CN201911258673A CN111001263A CN 111001263 A CN111001263 A CN 111001263A CN 201911258673 A CN201911258673 A CN 201911258673A CN 111001263 A CN111001263 A CN 111001263A
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- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/06—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with moving adsorbents, e.g. rotating beds
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- B01D53/24—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by centrifugal force
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- B—PERFORMING OPERATIONS; TRANSPORTING
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Abstract
The invention relates to a method for strengthening dehumidification effect of a rotary dehumidifier by using a supergravity reactor, which is characterized in that the supergravity reactor is used as pretreatment equipment of the rotary dehumidifier, moisture-containing gas enters the supergravity reactor, the supergravity reactor utilizes the gathering effect of a wire mesh filler on water vapor to lead the water vapor to be gathered into water drops, or utilizes the water absorption effect of a water absorption filler to remove moisture, and simultaneously, the water drops are thrown out by virtue of huge centrifugal force. The method provided by the invention has the advantages that: simple process flow, small device volume, reliable operation and low equipment investment cost. In the hypergravity machine, the humidity of the gas can be greatly reduced, the application range of the hypergravity machine is expanded, and a new idea is provided for the gas dehumidification technology.
Description
Technical Field
The invention relates to a rotary wheel dehumidification technology in the field of chemical engineering, in particular to a supergravity reactor enhanced rotary wheel dehumidification technology.
Background
Gas dehumidification refers to the removal of water vapor contained in a gas, which, by itself, is not harmful to human health and the environment. However, when the water vapor content in the air is too high, the sense organ discomfort of the human body can be caused, even bacteria are bred, and diseases are caused; the steel is greatly influenced by water vapor, and when the content of the water vapor in the air exceeds a certain value, electrochemical corrosion can occur, so that resource waste is caused; the requirements on the humidity of gas in the processes of gas valves, protective gas of chemical and medical product packaging lines, production of automatic instruments and the like in industrial production are high. Therefore, in many cases the amount of water vapour in the gas must be controlled. There are many mature gas dehumidification technologies, and the rotary wheel dehumidification technology is the most widely used technology. The rotary wheel dehumidification system utilizes a special moisture absorption material to absorb moisture in air, and has great effect application in the dehumidification field that other dehumidification modes such as normal temperature and low humidity can not meet the requirements. Since the advent of rotary dehumidification systems, their use in production and real life has become more widespread.
Hypergravity refers to the force that a substance experiences in an environment that is much larger than the acceleration of gravity of the earth. The supergravity technology increases the speed through the centrifugal force generated by high-speed rotation, simulates the supergravity environment, and realizes the strengthening of the micro mixing and mass transfer process. The equipment simulating the hypergravity environment is called a high-speed rotating packed bed, and the high-speed rotating packed bed generates huge centrifugal force through the high-speed rotation of a rotor (containing porous packing). The fluid participating in the reaction or separation flows and contacts in the porous medium or pore channel under the supergravity environment, and the huge shearing force breaks and tears the liquid into nano-scale films, filaments or drops, so that a great continuously updated phase interface is generated, and the mass transfer efficiency is greatly improved. In addition, the high-speed rotating packed bed has the advantages of small volume, low investment, small liquid holdup, safety, easy operation, simple and convenient maintenance and the like. In the gas dehumidification, the rotary packed bed device has small size and good mass transfer effect, and has certain advantages compared with the traditional absorption tower.
In the research progress of the gas dehumidification technology (natural gas chemical industry (C1 chemical and chemical industry), 2011(02): 79-82), Joule West et al mention that rotating wheel dehumidification belongs to one of adsorption dehumidification, and the adsorption dehumidification is generally used for the dehumidification of gases with small gas quantity and low humidity due to the common defects of adsorbents, such as small adsorption capacity, difficult regeneration, easy secondary pollution, high cost and the like. Therefore, the wheel dehumidification is not suitable for the treatment of high humidity gas.
Qidong et al, in Experimental research on dehumidification efficiency and air purification efficiency of a rotary wheel dehumidification system (HVAC, 2018, 48(12): 85-90), mention that when other conditions are the same, the dehumidification amount increases with the increase of the moisture content of the treated air, but the dehumidification efficiency decreases with the increase of the moisture content of the treated air. Therefore, the dehumidification efficiency of the rotary dehumidifier can be effectively improved by reducing the moisture content of the treated air.
In view of the foregoing, one disadvantage of current rotary dehumidification techniques is that they are not suitable for treating high humidity gases, and therefore require a pre-surface cooler to reduce the moisture content of the treated air. The invention provides a hypergravity reactor which replaces a preposed surface cooler to pretreat gas to be treated, and is beneficial to improving the dehumidification efficiency of a rotary dehumidifier.
Disclosure of Invention
The invention aims to strengthen the dehumidification effect of the rotary wheel dehumidifier by using the supergravity reactor.
The current rotary wheel dehumidification technology is mainly suitable for the treatment of low-humidity gas, and the humidity range of the treated gas is not wide enough. The hypergravity reactor is more efficient and has better treatment effect compared with a preposed surface cooler. The invention aims to strengthen the rotary dehumidification technology by using the supergravity reactor, and the supergravity reactor is used as a front surface cooler to process high-humidity gas into low-humidity gas, so that the processing efficiency and the processing capacity of the rotary dehumidifier are enhanced. Therefore, the proposal is that the super-gravity reactor is placed in front of a rotary dehumidifier to pretreat the wet air.
Further, the method comprises: the wet gas firstly enters the super-gravity reactor, the super-gravity reactor utilizes the collecting effect of the wire mesh filler on water vapor to lead the water vapor to be gathered into water drops, or utilizes the water absorption effect of the water absorption filler to remove the moisture, and simultaneously throws the water drops out by virtue of huge centrifugal force.
As one preferable scheme, the relative humidity of the gas input into the hypergravity reactor is 30-100%.
Further preferably, the relative humidity of the gas input into the supergravity reactor is 60-100%.
Preferably, the temperature of the gas fed into the high gravity machine is 10 to 90 ℃.
Further preferably, the temperature of the gas input into the high gravity machine is 20-60 ℃.
As one preferable scheme, the rotating speed of the rotor of the high-gravity machine is 200-3000 r/min.
Preferably, the rotating speed of the rotor of the high-gravity machine is 200-1500 rpm.
More preferably, the rotating speed of the rotor of the super-gravity machine is 500-1200 r/min.
As one preferable mode, the filler of the super-gravity machine is a wire mesh filler, a molecular sieve, silica gel, lithium chloride, activated alumina, a metal organic framework and the like.
As a preferable mode, a high-gravity reactor is used which uses a device for generating centrifugal force based on rotation, such as a rotating packed bed, a guide plate type rotating bed, a stator-rotor reactor, and a baffled rotating bed.
Further preferably, the supergravity rotating bed reactor is a rotating packed bed.
The invention utilizes the supergravity machine to pretreat the moisture-containing gas before the moisture-containing gas enters the rotary dehumidifier, has the effect obviously superior to the traditional rotary dehumidification technology, and is a novel method for strengthening the rotary dehumidification technology.
The method provided by the invention has the advantages that: simple process flow, small device volume, reliable operation and low equipment investment cost. In the hypergravity machine, the humidity of the gas can be greatly reduced, the application range of the hypergravity machine is expanded, and a new idea is provided for the gas dehumidification technology.
Drawings
The invention is further described with reference to the accompanying drawings in which:
fig. 1 is a schematic diagram of a supergravity reactor applied to a rotary dehumidification technology. Wherein the front end equipment is a supergravity reactor, and the rear end equipment is a rotary dehumidifier.
FIG. 2 is a flow chart of a supergravity reactor dehumidification experiment. Wherein, 1 is the air pump, 2 is the gas flowmeter, 3 is the air humidifier, 4 is the hypergravity reactor, 5, 6 are relative humidity test points.
FIG. 3 is a graph of humidity changes of outlet gas at different rotation speeds in a dehumidification experiment of a supergravity reactor. The abscissa is the rotational speed of the hypergravity reactor and the ordinate is the relative humidity of the outlet gas.
Detailed Description
Embodiments of the present invention are further illustrated by the following figures and examples. But not to limit the invention in any way.
The technological process of the present invention is mainly that the high humidity gas is treated into low humidity gas by the supergravity reactor, and the low humidity gas is pretreated by a rotary dehumidifier.
The current rotary wheel dehumidification technology is mainly suitable for the treatment of low-humidity gas, and has the defects of high energy consumption, high cost, difficult regeneration of an adsorbent and the like when treating high-humidity gas. The present invention uses a hypergravity reactor as a pretreatment device for the rotary dehumidification technology, as shown in fig. 1. The silk screen filler in the hypergravity reactor can make the steam in the high humidity gas gather into the water droplet, can change in addition and absorb water the filler, adsorb the steam in the gas, simultaneously because its inside huge centrifugal force, throws away the water droplet.
To verify the feasibility of the present invention, a hypergravity reactor dehumidification experiment was performed, the experimental flow is shown in fig. 2. The process uses a gas flowmeter to measure the air input, and simultaneously, the air humidity is respectively tested by a hygrometer at the inlet and the outlet of the hypergravity reactor to judge the dehumidification effect. The experimental result is shown in fig. 3, under the condition of three different gas amounts, the relative humidity of the gas outlet is obviously reduced along with the increase of the rotating speed, and the dehumidification effect of the hypergravity reactor is proved.
The following description will be given with reference to specific examples.
Example 1
The method is characterized in that a supergravity machine (self-developed by Beijing university of chemical industry) is adopted, a silk screen packing is used, the rotating speed of the supergravity machine is adjusted to 300 revolutions per minute, the gas quantity of inlet gas is 5.72 liters per minute, the inlet gas is saturated gas, and after the supergravity machine rotates for 30 minutes, the relative humidity of the outlet gas is 61%. The moisture-containing gas is passed through the supergravity machine once.
Example 2
The method is characterized in that a supergravity machine (self-developed by Beijing university of chemical industry) is adopted, a silk screen packing is used, the rotating speed of the supergravity machine is adjusted to be 400 revolutions per minute, the gas quantity of inlet gas is 5.72 liters per minute, the inlet gas is saturated gas, and after the supergravity machine rotates for 30 minutes, the relative humidity of the outlet gas is 54%. The moisture-containing gas is passed through the supergravity machine once.
Example 3
The method is characterized in that a supergravity machine (self-developed by Beijing university of chemical industry) is adopted, a silk screen packing is used, the rotating speed of the supergravity machine is adjusted to be 500 revolutions per minute, the gas quantity of inlet gas is 5.72 liters per minute, the inlet gas is saturated gas, and after the supergravity machine rotates for 30 minutes, the relative humidity of the outlet gas is 39%. The moisture-containing gas is passed through the supergravity machine once.
Example 4
The method is characterized in that a supergravity machine (self-developed by Beijing university of chemical industry) is adopted, a silk screen packing is used, the rotating speed of the supergravity machine is adjusted to be 600 revolutions per minute, the gas quantity of inlet gas is 5.72 liters per minute, the inlet gas is saturated gas, and after the supergravity machine rotates for 30 minutes, the relative humidity of the outlet gas is 30 percent. The moisture-containing gas is passed through the supergravity machine once.
Example 5
The method is characterized in that a supergravity machine (self-developed by Beijing university of chemical industry) is adopted, a silk screen packing is used, the rotating speed of the supergravity machine is adjusted to 300 revolutions per minute, the gas quantity of inlet gas is 4.20 liters per minute, the inlet gas is saturated gas, and after the supergravity machine rotates for 30 minutes, the relative humidity of the outlet gas is 57 percent. The moisture-containing gas is passed through the supergravity machine once.
Example 6
The method is characterized in that a supergravity machine (self-developed by Beijing university of chemical industry) is adopted, a silk screen packing is used, the rotating speed of the supergravity machine is adjusted to be 400 revolutions per minute, the gas quantity of inlet gas is 4.20 liters per minute, the inlet gas is saturated gas, and after the supergravity machine rotates for 30 minutes, the relative humidity of the outlet gas is 49 percent. The moisture-containing gas is passed through the supergravity machine once.
Example 7
The method is characterized in that a supergravity machine (self-developed by Beijing university of chemical industry) is adopted, a silk screen packing is used, the rotating speed of the supergravity machine is adjusted to be 500 revolutions per minute, the gas quantity of inlet gas is 4.20 liters per minute, the inlet gas is saturated gas, and after the supergravity machine rotates for 30 minutes, the relative humidity of the outlet gas is 40 percent. The moisture-containing gas is passed through the supergravity machine once.
Example 8
The method is characterized in that a supergravity machine (self-developed by Beijing university of chemical industry) is adopted, a silk screen packing is used, the rotating speed of the supergravity machine is adjusted to be 600 revolutions per minute, the gas quantity of inlet gas is 4.20 liters per minute, the inlet gas is saturated gas, and after the supergravity machine rotates for 30 minutes, the relative humidity of the outlet gas is 36 percent. The moisture-containing gas is passed through the supergravity machine once.
Example 9
The method is characterized in that a supergravity machine (self-developed by Beijing university of chemical industry) is adopted, a silk screen packing is used, the rotating speed of the supergravity machine is adjusted to 300 revolutions per minute, the gas quantity of inlet gas is 3.72 liters per minute, the inlet gas is saturated gas, and after the supergravity machine rotates for 30 minutes, the relative humidity of the outlet gas is 54%. The moisture-containing gas is passed through the supergravity machine once.
Example 10
The method is characterized in that a supergravity machine (self-developed by Beijing university of chemical industry) is adopted, a silk screen packing is used, the rotating speed of the supergravity machine is adjusted to be 400 revolutions per minute, the gas quantity of inlet gas is 3.72 liters per minute, the inlet gas is saturated gas, and after the supergravity machine rotates for 30 minutes, the relative humidity of the outlet gas is 43 percent. The moisture-containing gas is passed through the supergravity machine once.
Example 11
The method is characterized in that a supergravity machine (self-developed by Beijing university of chemical industry) is adopted, a silk screen packing is used, the rotating speed of the supergravity machine is adjusted to be 500 revolutions per minute, the gas quantity of inlet gas is 3.72 liters per minute, the inlet gas is saturated gas, and after the supergravity machine rotates for 30 minutes, the relative humidity of the outlet gas is 34 percent. The moisture-containing gas is passed through the supergravity machine once.
Example 12
The method is characterized in that a supergravity machine (self-developed by Beijing university of chemical industry) is adopted, a silk screen packing is used, the rotating speed of the supergravity machine is adjusted to be 600 revolutions per minute, the gas quantity of inlet gas is 3.72 liters per minute, the inlet gas is saturated gas, and after the supergravity machine rotates for 30 minutes, the relative humidity of the outlet gas is 35%. The moisture-containing gas is passed through the supergravity machine once.
The embodiment shows that the method provided by the invention can meet the treatment requirement of moisture-containing gas, and the supergravity machine is used as the pretreatment equipment of the rotary dehumidifier, so that the method is a novel and effective reinforced rotary dehumidification technical method. The method can greatly reduce the relative humidity of the gas to be treated, is favorable for improving the dehumidification efficiency of the rotary dehumidifier and reducing the production cost, and has the advantages of simple process, continuous operation, less occupied area of core equipment and small volume.
Those skilled in the art will appreciate that the above embodiments are merely exemplary embodiments and that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention. All obvious changes and modifications which are obvious to the technical scheme of the invention are covered by the protection scope of the invention.
Claims (3)
1. A method for strengthening dehumidification effect of a rotary dehumidifier by using a supergravity reactor is characterized in that the supergravity reactor is used as pretreatment equipment of the rotary dehumidifier, moisture-containing gas firstly enters the supergravity reactor, the supergravity reactor utilizes the collection effect of a wire mesh filler on water vapor to lead the water vapor to be gathered into water drops, or utilizes the water absorption effect of a water absorption filler to remove moisture, and simultaneously throws out the water drops by virtue of huge centrifugal force:
the relative humidity of the gas entering the hypergravity reactor is 30-100%;
the temperature of the gas entering the hypergravity reactor is 10-90 ℃;
the rotating speed of a rotor of the super-gravity machine is 200-3000 r/min.
2. The method of claim 1, wherein the method comprises: the supergravity reactor used includes, but is not limited to, a rotary packed bed, a guide plate type rotating bed, a stator-rotor reactor, a baffled rotating bed and the like which generate centrifugal force based on rotation.
3. The method of claim 1, wherein the method comprises: fillers used include, but are not limited to, wire mesh fillers, molecular sieves, silica gel, lithium chloride, activated alumina, metal organic frameworks, and the like.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101810935A (en) * | 2010-04-02 | 2010-08-25 | 北京化工大学 | Method and device for regenerating liquid desiccant |
| CN102095231A (en) * | 2011-03-23 | 2011-06-15 | 广东申菱空调设备有限公司 | Ultra-low humidity compound dehumidifier and control method thereof |
| CN104633776A (en) * | 2015-02-05 | 2015-05-20 | 大连盛仁能源科技发展有限公司 | Multi-function indoor air treatment system |
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- 2019-12-10 CN CN201911258673.6A patent/CN111001263A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101810935A (en) * | 2010-04-02 | 2010-08-25 | 北京化工大学 | Method and device for regenerating liquid desiccant |
| CN102095231A (en) * | 2011-03-23 | 2011-06-15 | 广东申菱空调设备有限公司 | Ultra-low humidity compound dehumidifier and control method thereof |
| CN104633776A (en) * | 2015-02-05 | 2015-05-20 | 大连盛仁能源科技发展有限公司 | Multi-function indoor air treatment system |
Non-Patent Citations (1)
| Title |
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| 焦纬洲等: "《旋转填料床用于气体除湿的研究》", 《天然气化工》 * |
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