CN108636068A - A kind of compressed air absorption drier control system - Google Patents
A kind of compressed air absorption drier control system Download PDFInfo
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- CN108636068A CN108636068A CN201810563157.3A CN201810563157A CN108636068A CN 108636068 A CN108636068 A CN 108636068A CN 201810563157 A CN201810563157 A CN 201810563157A CN 108636068 A CN108636068 A CN 108636068A
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- 238000010521 absorption reaction Methods 0.000 title claims abstract description 65
- 238000001035 drying Methods 0.000 claims abstract description 156
- 238000001179 sorption measurement Methods 0.000 claims abstract description 122
- 238000007710 freezing Methods 0.000 claims abstract description 30
- 230000008014 freezing Effects 0.000 claims abstract description 30
- 238000003860 storage Methods 0.000 claims abstract description 27
- 239000003463 adsorbent Substances 0.000 claims description 50
- 238000011069 regeneration method Methods 0.000 claims description 50
- 230000008929 regeneration Effects 0.000 claims description 49
- 238000005265 energy consumption Methods 0.000 claims description 17
- 230000001172 regenerating effect Effects 0.000 claims description 12
- 238000000034 method Methods 0.000 claims description 9
- 238000009792 diffusion process Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 6
- 238000004364 calculation method Methods 0.000 claims description 5
- 238000010926 purge Methods 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 4
- 238000001704 evaporation Methods 0.000 claims description 4
- 230000008020 evaporation Effects 0.000 claims description 4
- 230000004913 activation Effects 0.000 claims description 3
- 230000004048 modification Effects 0.000 claims description 2
- 238000012986 modification Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 6
- 239000002156 adsorbate Substances 0.000 description 12
- 239000003507 refrigerant Substances 0.000 description 9
- 238000009833 condensation Methods 0.000 description 7
- 230000005494 condensation Effects 0.000 description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 4
- 230000008439 repair process Effects 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 2
- 238000012432 intermediate storage Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- 230000007420 reactivation Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 241001269238 Data Species 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000007605 air drying Methods 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000994 depressogenic effect Effects 0.000 description 1
- 239000002274 desiccant Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000004108 freeze drying Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 235000015110 jellies Nutrition 0.000 description 1
- 239000008274 jelly Substances 0.000 description 1
- 208000030208 low-grade fever Diseases 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000002594 sorbent Substances 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- 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
- B01D53/26—Drying gases or vapours
- B01D53/261—Drying gases or vapours by adsorption
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- 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
- B01D53/002—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 condensation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- 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
- B01D53/04—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 stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
- B01D53/0423—Beds in columns
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- 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
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/4009—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating using hot gas
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Drying Of Gases (AREA)
Abstract
The present invention provides a kind of compressed air absorption drier control system, which includes prime freezing type drying system, intermediate gas storage system, rear class absorbed type drying system and control coordination system；The prime freezing type drying system carries out first order drying to external air；The intermediate gas storage system is to coordinate the prime freezing type drying system air capacity dry with the processing of rear class absorbed type drying system；The air of central exit solenoid valve outflow, which enters in the thermoregulator of rear class absorbed type drying system, carries out gas temperature adjusting；The rear class absorbed type drying system carries out the second level to the processed air of prime freezing type drying system and is adsorbed by drying；The control coordination system is used for controlling the solenoid valve in system, ensures system coordination continuous service.While the present invention greatlys improve energy efficiency by designing above and ensure ideal adsorption effect.
Description
Technical field
The present invention relates to drying machine control technology fields, and in particular to is controlled using a kind of compressed air absorption drier
System
Background technology
Absorption type dryer is to utilize adsorbent, usually the water in the absorption such as Gui glue, activated alumina, molecular sieve air
Point, achieve the purpose that drying compressed air.The method can make the dew point of compressed air reach -20--70 degrees Celsius, take certain arrange
Shi Houke make dew point down to -80 degree below.The basic process being adsorbed by drying is the absorption of adsorbent, regeneration, again adsorption process, is inhaled
Adsorbate gradually accumulates on the sorbent when attached, and adsorbate is gradually removed from adsorbent when regeneration.It is adsorbed by drying compressed air
When adsorbent regeneration have：Heat method of reproduction, heatless regeneration method and low-grade fever method of reproduction.Adsorbent is to water in compressed air
Adsorption capacity has great relationship with temperature when absorption, and adsorption capacity reduces when adsorption temp increases, otherwise adsorption capacity liter
Height, heating regeneration are exactly to carry out compressed air drying using this characteristic of adsorbent.Drying system uses double tower, tower absorption
One tower regenerates.
The control system of absorption drier is equipped with many pneumatic elements, therefore, in absorption drier to aqueous pressure
During contracting air is dried, the control system gas supply to absorption drier is needed, to ensure absorption drier
Normal operation.
In existing absorption drier, desiccant adsorbent loss is more, and the pressure loss is big, and energy consumption is high；It is instantaneous de-
Attached energy force difference, regeneration air consumption are big；And intelligent level is not high, and the various data of manual record and people are required under most of situations
Industry control system；And suitable estimation means are lacked to the adsorption capacity after adsorbent reactivation, it can not be closed according to adsorption capacity
The control air inlet electromagnetic valve of reason；And when handling quantitative gas, how to accomplish the raising of energy efficiency and ensure ideal
Adsorption effect is always a problem to be solved.
Invention content
In view of the above-mentioned problems, the present invention is intended to provide a kind of compressed air absorption drier control system, it being capable of basis
Adsorption capacity reasonably controls air inlet electromagnetic valve；And when handling quantitative gas, the same of energy efficiency can be greatlyd improve
When and ensure ideal adsorption effect.
The purpose of the present invention is realized using following technical scheme：
A kind of compressed air absorption drier control system, the system include prime freezing type drying system, intermediate storage
Gas system, rear class absorbed type drying system and control coordination system；The prime freezing type drying system be provided with forecooler,
Evaporator and multiple controllable electromagnetic valves, for the air of outside is passed sequentially through forecooler and evaporator, and then realization pair
External air carries out first order drying；The intermediate gas storage system includes intermediate air inlet electromagnetic valve, intermediate air accumulator and centre
Outlet solenoid valve stores up after intermediate air inlet electromagnetic valve into intermediate air accumulator for the air after being dried the first order
It deposits, to coordinate the prime freezing type drying system air capacity dry with the processing of rear class absorbed type drying system；The centre goes out
The air of mouthful solenoid valve outflow, which enters in the thermoregulator of rear class absorbed type drying system, carries out gas temperature adjusting；After described
Grade absorbed type drying system also include successively：Drying tower and intake valve corresponding with drying tower, air outlet valve, pressure reducing valve, are used for
Air after thermoregulator is adjusted passes through device described above successively, be adsorbed by drying and realizes second level drying；Institute
Control coordination system is stated to be used for the electricity in prime freezing type drying system, intermediate gas storage system, rear class absorbed type drying system
Magnet valve is controlled, and then realization is to the air inlet treating capacity of prime freezing type drying system, the storage gas of intermediate gas storage system
Amount, the accessible air capacity of rear class absorbed type drying system carry out coordination control, ensure system coordination continuous service.
Preferably, the drying tower is divided into adsorption tower and regenerator according to working condition, and drying tower is in two kinds of working conditions
Between switch, after the aqueous vapor in the air that the adsorption tower dries out the first order is adsorbed, eventually become regenerator；It is described
Regenerator regeneration after high temperature evaporation, sub-cooled, purging regenerate these processes becomes adsorption tower.
Preferably, the central exit solenoid valve is arranged two, is connected in corresponding thermoregulator, thermoregulator
Absorption intake valve and regenerative intake valve is connected with by pipeline respectively, the absorption intake valve and regenerative intake valve all for into
Air valve is connect with the drying tower of corresponding working state, is used for by flowing into air temperature modification in adsorption tower or regenerator, into
And realize the adjusting of adsorbent surface temperature in tower.
Preferably, the outside of the adsorption tower and regenerator is all connected with regeneration air accumulator by gas storage solenoid valve, is used for
Regenerator is regenerated consumed dry gas to store.
Preferably, the control coordination system includes rear class energy consumption computing unit, power distributing unit and adsorption capacity
Determination unit；The rear class energy consumption computing unit is used at energy consumption for drying ratio and prime freezing type drying system according to setting
Unit interval institute's wasted work rate when managing external air, to control rear class absorbed type drying system unit time institute's wasted work rate；The work(
In the adsorption tower that rate allocation unit is used to calculate thermoregulator institute wasted work rate and regeneration becomes between pressure adjusting institute wasted work rate
Power ratio, and then rear class absorbed type drying system unit time institute's wasted work rate is allocated, is used for in drying tower
Adsorbent temperature and gas pressure intensity are adjusted；The adsorption capacity determination unit is used for becoming adsorption tower to regenerator regeneration
Adsorption capacity calculated, pair controlled with the absorption intake valve that is correspondingly connected with of adsorption tower after regeneration according to adsorption capacity
System, for closing absorption intake valve when adsorption treatment air capacity reaches adsorption capacity.
Preferably, the calculation formula of adsorption capacity of the regenerator after regeneration is：
In formula, Sk+1For the adsorption capacity of+1 absorption of adsorption tower kth after kth time regeneration；SkFor adsorption tower kth time absorption
Adsorption capacity；B is that adsorption capacity regenerates decay factor, L0To may participate in the siding-to-siding block length of absorption in drying tower, L is drying tower
The diameter of middle adsorbent bed；DPFor adsorbent surface diffusion coefficient；RSFor the Diffusion Activation Energy of adsorbent surface；P is to be waited in drying tower
The setting pressure of dry air；R is the radius of adsorption tower；T is the temperature of collected adsorbent surface.
Beneficial effects of the present invention are：The present invention by devising a kind of compressed air absorption drier control system,
And the work that the adsorption capacity of the drying tower after each absorption regeneration is estimated, and is adsorbed next time based on this control
Amount extends the service life of adsorbent, and the gas institute wasted work rate determined to processing adsorption capacity carries out calculating distribution, greatly
While improving energy efficiency and ensure ideal adsorption effect.
Description of the drawings
Using attached drawing, the invention will be further described, but the embodiment in attached drawing does not constitute any limit to the present invention
System, for those of ordinary skill in the art, without creative efforts, can also obtain according to the following drawings
Other attached drawings.
Fig. 1 is the composition frame construction drawing of drying machine control system in a preferred embodiment of the present invention；
Reference numeral：
Inlet filter 1, forecooler 2, evaporator 3, drain filter 4, medial inlet solenoid valve 5, intermediate air accumulator 6,
Central exit solenoid valve 7, thermoregulator 8 adsorb intake valve 9, and regenerative intake valve 10 regenerates air accumulator 11, gas storage solenoid valve
12, boost blow down valve 13, adsorption tower air outlet valve 14, pressure reducing valve 15, compressor 301, condenser 302, heating power by-passing valve 303, heat
Power expansion valve 304.
Specific implementation mode
In conjunction with following application scenarios, the invention will be further described.
In the present embodiment, referring to Fig. 1, a kind of compressed air absorption drier control system, the system includes that prime is cold
Jelly formula drying system, intermediate gas storage system, rear class absorbed type drying system and control coordination system；The prime freezing type is dry
Drying system be provided with forecooler, evaporator and multiple controllable electromagnetic valves, for by the air of outside pass sequentially through forecooler with
And evaporator, and then realize and first order drying is carried out to external air；The intermediate gas storage system include intermediate air inlet electromagnetic valve,
Intermediate air accumulator and intermediate outlet solenoid valve, it is laggard through intermediate air inlet electromagnetic valve for the air after being dried the first order
Enter intermediate air accumulator to be stored, to coordinate prime freezing type drying system and the processing drying of rear class absorbed type drying system
Air capacity；The air of central exit solenoid valve outflow enters in the thermoregulator of rear class absorbed type drying system into promoting the circulation of qi
Temperature is adjusted；The rear class absorbed type drying system also includes successively：Drying tower and intake valve corresponding with drying tower,
Air outlet valve, pressure reducing valve, for thermoregulator is adjusted after air successively pass through device described above, be adsorbed by drying
Realize second level drying；The control coordination system is used for adsorbing prime freezing type drying system, intermediate gas storage system, rear class
Solenoid valve in formula drying system is controlled, and then realizes the air inlet treating capacity to prime freezing type drying system, intermediate storage
The storage gas flow of gas system, the accessible air capacity of rear class absorbed type drying system carry out coordination control, ensure the association of system
Adjust continuous service.
The prime freezing type drying system is to the process that air is dried：Humid air enters air inlet duct,
Enter forecooler by inlet solenoid valve and inlet filter, carry out prime precooling, being used for will be big in oversaturated humid air
Amount vapor carries out being condensed into liquid, also reduces freeze-drying load for the further condensation in rear class evaporator is dry；It will be through
The air crossed after prime precooling is sent into the condensation pipe in evaporator, also has refrigerant tubing in evaporator, in condensation pipe
Air carries out heat exchange with the refrigerant in refrigerant tubing, and the further heat release cooling of the air in condensation pipe condenses out big
The liquid water of amount；The water of air and condensation after condensation pipe is freezed by drain filter by water be discharged and to air into
The further filtering of row；
After the heat exchange in evaporator, low temperature, low pressure refrigerant suction condensation pipe in air heat and
Vaporization, is siphoned away to compresser cylinder by compressor, carries out the refrigerant vapour for being compressed into high temperature and pressure；Then by high temperature and pressure
Refrigerant vapour is depressed into condenser, is carried out cooling and is condensed into refrigerant liquid, refrigerant liquid is sent by solenoid valve to heating power
Expansion valve, the refrigerant for becoming low-temp low-pressure again after expansion valve enter evaporator, heating power by-passing valve are additionally provided with, for protecting
The system of holding can work normally under given minimum pressure of inspiration(Pi)；
In the present embodiment, the drying tower is divided into adsorption tower and regenerator according to working condition, and drying tower works at two kinds
Switch between state, the adsorption tower becomes regenerator after the aqueous vapor after absorption first order drying in air；The regenerator
It is regenerated as adsorption tower after high temperature evaporation, sub-cooled, purging regenerative process.
In the present embodiment, the central exit solenoid valve is arranged two, is connected in corresponding thermoregulator, temperature tune
Section device is connected with absorption intake valve and regenerative intake valve by pipeline respectively, and the absorption intake valve and regenerative intake valve are all
It for intake valve, connect, is used for by flowing into air themperature tune in adsorption tower or regenerator with the drying tower of corresponding working state
Section, and then realize the adjusting of adsorbent surface temperature in tower.
In the present embodiment, the outside of the adsorption tower and regenerator is all connected with regeneration air accumulator by gas storage solenoid valve,
It is stored for regenerator to be regenerated consumed dry gas.
In the present embodiment, the air after the drying of prime freezing type drying system is sent into drain filter, then will be described
Pass through medial inlet solenoid valve by the filtered air of drain filter, is stored into intermediate air accumulator, intermediate air accumulator
Outlet is equipped with central exit solenoid valve, and the air stored in intermediate air accumulator passes through central exit solenoid valve, is adjusted into temperature
Device；Thermoregulator is also connected to rear class absorbed type drying system by pipeline；There are two the central exit solenoid valves, each
Central exit solenoid valve all connects there are one thermoregulator；One of thermoregulator is connected to adsorption tower intake valve, is used for
Suitable temperature is adjusted into trip temperature to the air brought, for promoting drying effect in adsorption tower；Another described temperature
Adjuster is connected to adsorption tower air outlet valve, for being heated to the air brought, forms hot-air and send to right in adsorption tower
Adsorbent is regenerated.
In the present embodiment, pressue device is equipped in the adsorption tower, for carrying out air pressure adjustment in adsorption tower.The suction
A regeneration air accumulator is also respectively provided on attached tower, regeneration air accumulator is connect with adsorption tower by pipeline, and the pipeline is equipped with storage
Pneumoelectric magnet valve and moisture monitors；The regeneration air accumulator is used for after consuming and being adsorbed by drying when adsorbent reactivation in adsorption tower
Air storage, avoid gas loss.
It in the present embodiment, does not limit the invention, is merely representative of in attached drawing image below in relation to upper and lower description
Upper and lower relation.
In the present embodiment, two drying towers, one tower in normal work adsorbs a tower in the rear class absorbed type drying system
Regeneration, the above adsorption tower are in the working condition being adsorbed by drying, and lower adsorption tower is analyzed in reproduction operation state：
Upper central exit solenoid valve is opened, and the air in intermediate air accumulator is adjusted through upper thermoregulator into trip temperature, then
It is delivered in the adsorption tower after pressure is adjusted and is adsorbed by upper absorption intake valve；Upper regenerative intake valve, gas storage at this time
Solenoid valve is closed, boosting blow down valve and pressure reducing valve are closed；Air is discharged after being adsorbed by drying by upper adsorption tower air outlet valve；
Lower adsorption tower is ready for regenerating, and is first turned on lower pressure reducing valve, other valves being connect with lower adsorption tower are all closed；
Atmospheric pressure is down in the air pressure in lower adsorption tower by pressure reducing valve；Then the air in intermediate air accumulator is passed through into lower intermediate electromagnetism
Valve is sent into heating in thermoregulator, forms regeneration air；Regeneration air water content is small at this time, and air themperature is higher, holds
Vapor ability of receiving is stronger；Lower regenerative intake valve is opened, regeneration air is passed through the adsorption tower that air pressure is atmospheric pressure, regeneration air
High temperature the moisture evaporation in adsorbent is taken away, through lower pressure reducing valve be discharged；The moisture detector on air accumulator is regenerated to regeneration
The humidity of air is monitored in real time, and the humidity of regeneration air first becomes larger to be reduced afterwards, once the humidity of regeneration air is reduced to conjunction
When suitable setting value, heating regenerative process terminates, and closes lower regenerative intake valve and lower pressure reducing valve at this time；Finally, it will boost
The gas storage solenoid valve of blow down valve 13 and lower adsorption tower open, by upper adsorption tower dry after air by boost blow down valve send to
In lower adsorption tower, lead to too small amount of dry air from bottom of tower to tower top, adverse current cooling is carried out to regenerator and purging regenerates, it is right
The water content that adsorbent carries out the dry air after purging regeneration increases on a small quantity again；At this point, gas storage solenoid valve is also opened, it will be aqueous
Dry air after amount increases be drawn into regeneration air accumulator and is stored, and closes gas storage solenoid valve；At this point, lower absorption
Tower (regenerator) carries out pressure recovery to system working pressure, into working condition to be adsorbed, wait for control system instruction to
Switch to adsorb working condition.
After the absorption fully of upper adsorption tower, control system sends switching signal, and upper adsorption tower switchs to regenerator at this time, carries out
The regeneration of process as described above；Lower adsorption tower switchs to adsorbed state, and the air of intermediate air accumulator is dried, and controls simultaneously
Gas storage solenoid valve is opened, and will be regenerated to regenerate air used in air accumulator and be discharged into lower adsorption tower and is adsorbed by drying, under
Adsorption tower air outlet valve is discharged.
In the present embodiment, the multiple adsorption layers of setting in the drying tower, adsorption layer includes adsorbent bed, and adsorbent bed includes metal
Supporting network, the adsorbent being evenly distributed in metal support network.
In the present embodiment, the control coordination system includes rear class energy consumption computing unit, power distributing unit and absorption
Capacity determination unit；The rear class energy consumption computing unit is used for energy consumption for drying ratio and prime freezing type the drying system according to setting
Unit interval institute's wasted work rate when system processing external air, to control rear class absorbed type drying system unit time institute's wasted work rate；Institute
It states power distributing unit and adjusts institute's wasted work rate for calculating pressure in the adsorption tower that thermoregulator institute wasted work rate becomes with regeneration
Between power ratio, and then rear class absorbed type drying system unit time institute's wasted work rate is allocated, is used for drying tower
In adsorbent temperature and gas pressure intensity be adjusted；The adsorption capacity determination unit, which is used for becoming regenerator regeneration, inhales
The adsorption capacity of attached tower is calculated, and is carried out come pair absorption intake valve being correspondingly connected with adsorption tower after regeneration according to adsorption capacity
Control, for closing absorption intake valve when adsorption treatment air capacity reaches adsorption capacity.
In the present embodiment, for this drying system, the drying of prime freezing type and rear class absorbed type drying group are used
At two-stage drying, which represents the operating rate of its processing gas in unit interval institute's wasted work rate；Therefore root
According to power spent by the prime freezing type drying unit interval, and the energy consumption for drying in guarantee system is that standard is minimum than value
In the case of, power spent by rear class absorbed type drying can be obtained；The rear class consumes energy computing unit to rear class absorbed type drying system
System unit interval institute's wasted work rate determination formula be：
In formula, Z is energy consumption for drying ratio, PqFor prime freezing type drying refrigeration machine unit interval institute's wasted work rate in time T；
PhBy the power that rear class absorbed type drying system consumes in time T；Q0To input prime freezing type drying system during primary drying
The initial humidity of air, Q in system1For the medial humidity of homogeneous drying process dry matter air after the drying of prime freezing type；Qx
For after adsorption drying process is handled, the averaged power spectrum humidity of matter is dried after rear class absorbed type drying；ρ is to be adsorbed by drying heel row
The priori average air density gone out；ρ0For without being adsorbed by drying the atmospheric density flowed out from intermediate air accumulator；V is in adsorption tower
Volume；V is the setting rate that rear class is adsorbed by drying.
In the present embodiment, factory calibration value can be set according to professional standard, determine minimum energy consumption for drying ratio Z values, and
According to the data that the value and sensor acquire, the adsorption capacity obtained using above-mentioned estimation determines gas flow, according to gas
Humidity, density and the time of flow determine the power of rear class absorption drying system.
In this preferred embodiment, two-stage drying system is devised, the case where known prime freezing type dries institute's wasted work rate
Under (according to the gas humidity for entering prime, to select freezing type drying institute wasted work rate), devise energy consumption for drying than calculating it is public
Formula, in the case where ensureing that prime reaches preferable drying efficiency with rear class cooperation, and it is relatively low for the energy consumption for drying of guarantee system, here
Energy consumption for drying in the case of selection standard than minimum value, realizing reduces energy consumption, and determines the work(that rear class absorbed type drying is consumed
Rate.
In the present embodiment, after calculating the power that rear class absorbed type drying is consumed, so that it may calculate thermoregulator institute wasted work
Pressure adjusts the power ratio between institute's wasted work rate in the adsorption tower that rate and regeneration become, according to ratio and rear class absorbed type drying
System consumption power determines that the adsorbent temperature in drying tower adjusts institute's wasted work rate and gas pressure intensity is adjusted and is consumed respectively
Power, realize in drying tower adsorbent temperature and gas pressure intensity be adjusted；Wherein temperature of the thermoregulator to gas
Degree is adjusted, and gas enters in drying tower and then carries out influence adjusting to adsorbent temperature.
In the present embodiment, pressure is adjusted between institute's wasted work rate in thermoregulator institute wasted work rate and the adsorption tower that becomes of regeneration
The calculation formula of power ratio be：
In formula, λ adjusts the ratio of institute's wasted work rate and Adsorbate Gas pressure adjusting institute wasted work rate in tower for adsorbent temperature；
λkFor the adsorption capacity and adsorption temp, the Adaptation factor of pressure of kth time；SkFor the adsorption capacity of kth time；S0For adsorbent
Originate adsorption capacity；μ is pressure regulatory factor；ρ is density of the adsorbate containing aqueous vapor under standard atmospheric pressure under set temperature；ρk
Under absorption fixed temperature for kth time, the density containing aqueous vapor in adsorbate when pressure does not adjust；ρWIt is solid for the absorption of kth time
Determine at temperature so that the density containing aqueous vapor reaches corresponding density when saturation in adsorbate；ε is temperature regulatory factor；TWFor kth
Under secondary absorption fixed pressure so that the density containing aqueous vapor reaches corresponding temperature when saturation in adsorbate；TkThe absorption of kth time
Under unjustified mistake temperature value.
In this preferred embodiment, devises adsorbent temperature and adjust institute's wasted work rate and adsorbate pressure adjusting institute wasted work in tower
The calculation formula of the ratio λ of rate has considered adsorption capacity variation, temperature and pressure and has absorbed adsorbate ability to adsorbent
Influence so that the factor being affected can by the ratio λ calculated, be assigned to it is more adjust power hungries, with
The raising absorbed type drying effect of maximum possible.
In the present embodiment, is adjusted by above-mentioned temperature and controlled with pressure, to the gas by rear class absorbed type drying system
It is discharged after being further dried, which is also changed into the regenerator of reproduced state by the adsorption tower of absorption working condition；
The drying tower is regenerated by aforementioned regenerative process, is used for regenerating it as inhaling by adsorption capacity determination unit after regeneration
The adsorption capacity of attached tower is calculated, and adsorption tower is correspondingly connected with when according to adsorption capacity come to being adsorbed by drying after regeneration next time
Absorption intake valve is controlled, and the adsorption treatment air capacity entered when for drying next time closes absorption when reaching adsorption capacity
Intake valve.
In the present embodiment, the calculation formula of adsorption capacity of the regenerator after regeneration is：
In formula, Sk+1For the adsorption capacity of+1 absorption of adsorption tower kth after kth time regeneration；SkFor adsorption tower kth time absorption
Adsorption capacity；B is that adsorption capacity regenerates decay factor, L0To may participate in the siding-to-siding block length of absorption in drying tower, L is drying tower
The diameter of middle adsorbent bed；DPFor adsorbent surface diffusion coefficient；RSFor the Diffusion Activation Energy of adsorbent surface；P is to be done in drying tower
The setting pressure of internal gas when dry state；R is the radius of adsorption tower；T is that drying tower is collected during adsorbed gas
The temperature of adsorbent surface.
In the present embodiment, in the collected drying tower of regeneration times and sensor write down by sensor for countering
The pressure in closing adsorption tower of temperature, Adsorbate Gas in adsorbent, the absorption for calculating adsorbent in its drying tower are held
Amount, and then determine the total amount of its accessible Adsorbate Gas, central exit solenoid valve is adjusted by total amount, controls adsorbate gas
The flow of body, is adjusted temperature and pressure, continues to be adsorbed by drying and regenerate.
In this preferred embodiment, it is contemplated that the adsorbent bed in drying tower is by multiple absorption, regeneration；With repeatedly again
Raw, necessarily there is also the adsorbents of residual absorption in adsorbent bed without regeneration, is based on this, it is contemplated that the decaying of adsorption capacity,
And the influence of adsorbent adsorbent diffusivity and adsorbent bed size and adsorption temp and pressure in regenerative process, it is based on
A large amount of test datas devise the estimation formulas of adsorption capacity, can accurately estimate the adsorbent bed after absorption regeneration next time
Adsorption capacity, control absorption workload, extend the service life of adsorbent.
Finally it should be noted that the above embodiments are merely illustrative of the technical solutions of the present invention, rather than the present invention is protected
The limitation of range is protected, although being explained in detail to the present invention with reference to preferred embodiment, those skilled in the art answer
Work as analysis, technical scheme of the present invention can be modified or replaced equivalently, without departing from the reality of technical solution of the present invention
Matter and range.
Claims (6)
1. a kind of compressed air absorption drier control system, which is characterized in that the system includes prime freezing type drying system
System, intermediate gas storage system, rear class absorbed type drying system and control coordination system；The prime freezing type drying system setting
Forecooler, evaporator and multiple controllable electromagnetic valves, for the air of outside is passed sequentially through forecooler and evaporator, into
And it realizes and first order drying is carried out to external air；The intermediate gas storage system includes intermediate air inlet electromagnetic valve, intermediate air accumulator
And intermediate outlet solenoid valve, enter intermediate gas storage after intermediate air inlet electromagnetic valve for the air after being dried the first order
Tank is stored, to coordinate the prime freezing type drying system air capacity dry with the processing of rear class absorbed type drying system；Institute
The air for stating the outflow of central exit solenoid valve enters and carries out gas temperature tune in the thermoregulator of rear class absorbed type drying system
Section；The rear class absorbed type drying system also includes successively：Drying tower and intake valve corresponding with drying tower, subtract air outlet valve
Pressure valve, for thermoregulator is adjusted after air successively pass through device described above, carry out being adsorbed by drying realization second
Grade is dry；The control coordination system is used for prime freezing type drying system, intermediate gas storage system, rear class absorbed type drying system
Solenoid valve in system is controlled, and then is realized to the air inlet treating capacity of prime freezing type drying system, intermediate gas storage system
Storage gas flow, the accessible air capacity of rear class absorbed type drying system carry out coordination control, ensure that system coordination is persistently transported
Row.
2. a kind of compressed air absorption drier control system according to claim 1, which is characterized in that the drying
Tower is divided into adsorption tower and regenerator according to working condition, and drying tower switches between two kinds of working conditions, the adsorption tower pair first
After aqueous vapor in the air that grade dries out is adsorbed, regenerator is eventually become；The regenerator is by high temperature evaporation, low temperature
Regeneration becomes adsorption tower after cooling, purging regenerates these processes.
3. a kind of compressed air absorption drier control system according to claim 2, which is characterized in that the centre
Outlet solenoid valve is arranged two, is connected in corresponding thermoregulator, thermoregulator is connected with absorption by pipeline respectively
Intake valve and regenerative intake valve, the absorption intake valve and regenerative intake valve are all intake valve, with corresponding working state
Drying tower connects, and is used for by flowing into air temperature modification in adsorption tower or regenerator, and then adsorbent surface in realization tower
The adjusting of temperature.
4. a kind of compressed air absorption drier control system according to claim 2, which is characterized in that the absorption
The outside of tower and regenerator is all connected with regeneration air accumulator by gas storage solenoid valve, for regenerator to be regenerated to consumed drying gas
Body is stored.
5. a kind of compressed air absorption drier control system according to claim 2, which is characterized in that the control
Coordination system includes rear class energy consumption computing unit, power distributing unit and adsorption capacity determination unit；The rear class energy consumption meter
It calculates unit and is used for unit interval institute when energy consumption for drying ratio and prime freezing type drying system the processing external air according to setting
Wasted work rate, to control rear class absorbed type drying system unit time institute's wasted work rate；The power distributing unit is for calculating temperature
Pressure adjusts the power ratio between institute's wasted work rate in the adsorption tower that adjuster institute wasted work rate and regeneration become, and then is inhaled to rear class
Attached formula drying system unit interval institute wasted work rate is allocated, be used for in drying tower adsorbent temperature and gas pressure intensity into
Row is adjusted；The adsorption capacity determination unit is used for calculating regenerator regeneration as the adsorption capacity of adsorption tower, according to
Adsorption capacity is carried out pair absorption intake valve being correspondingly connected with adsorption tower after regeneration and is controlled, and is reached for working as adsorption treatment air capacity
Intake valve is adsorbed to being closed when adsorption capacity.
6. a kind of compressed air absorption drier control system according to claim 5, which is characterized in that the regeneration
The calculation formula of adsorption capacity of the tower after regeneration is：
In formula, Sk+1For the adsorption capacity of+1 absorption of adsorption tower kth after kth time regeneration；SkFor the absorption of adsorption tower kth time absorption
Capacity；B is that adsorption capacity regenerates decay factor, L0To may participate in the siding-to-siding block length of absorption in drying tower, L is to be adsorbed in drying tower
The diameter of bed；DPFor adsorbent surface diffusion coefficient；RSFor the Diffusion Activation Energy of adsorbent surface；P is sky to be dried in drying tower
The setting pressure of gas；R is the radius of adsorption tower；T is the temperature of collected adsorbent surface.
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| CN112263896A (en) * | 2020-09-23 | 2021-01-26 | 福建凯美特气体有限公司 | Carbon dioxide double-tower adsorption drying process |
| CN113340765A (en) * | 2021-06-25 | 2021-09-03 | 西藏大学 | Molecular sieve material adsorption performance detection device and method |
| CN115155260A (en) * | 2022-07-05 | 2022-10-11 | 东风柳州汽车有限公司 | Double-parameter electronic air treatment system for commercial vehicle and dryer regeneration control method |
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| CN115155260A (en) * | 2022-07-05 | 2022-10-11 | 东风柳州汽车有限公司 | Double-parameter electronic air treatment system for commercial vehicle and dryer regeneration control method |
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