CN108579352A - A kind of drying system and its control method for compressed gas - Google Patents
A kind of drying system and its control method for compressed gas Download PDFInfo
- Publication number
- CN108579352A CN108579352A CN201810662573.9A CN201810662573A CN108579352A CN 108579352 A CN108579352 A CN 108579352A CN 201810662573 A CN201810662573 A CN 201810662573A CN 108579352 A CN108579352 A CN 108579352A
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- compressed gas
- drier
- dew
- drying
- dew point
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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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/80—Water
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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)
- Drying Of Gases (AREA)
Abstract
The present invention relates to a kind of drying systems and its control method for compressed gas, system includes the multiple drying units being arranged in parallel being connect with compressor and is responsible for the compressed gas of all drying units outlet connection, each drying unit includes the drier of two parallel connections and only one work, the outlet of every drier is equipped with single machine dew point hygrometer, the compressed gas supervisor is equipped with manifold dew point hygrometers, by monitoring the numerical value of single machine dew point hygrometer and manifold dew point hygrometers, switch the drier to work in drying unit.Compared with prior art, the present invention is effectively improved the dew-point temperature of pneumatic manifold, avoids that dew-point temperature is too low to bring unnecessary energy waste.
Description
Technical field
The present invention relates to technical field of drying, and in particular to a kind of compressed gas drying system and its control method.
Background technology
Gas compression is the common process of the industries such as light industry, chemical industry, medicine, smelting, for obtaining high pressure gas.Gas pressure
After contracting, vapor can condense, so needing to remove in this partial coagulation water.In general, the dewpoint requirements of dry required hot-air
It it is -25 DEG C, the compressed air dew point of separate unit absorption type dryer outlet is set in -70 DEG C to -25 with the adsorption capacity of drier
Change between DEG C.Using more driers and even by the way of, therefore the dew point of the mixed compressed air of pneumatic manifold with
The difference of more dryer export dew-point temperatures and change.Only when more drier dew points simultaneously at -25 DEG C when mixed pressure
Contracting air dew point reaches -25 DEG C of peak, when more drier dew points simultaneously at -70 DEG C when mixed compressed air dew point reach
To -70 DEG C of minimum.Since the adsorption time of separate unit drier is not quite identical, the dew point of pneumatic manifold is most of
Time all will remain in -25 DEG C or less.Dew-point temperature is lower, although compressed air quality is met the requirements, but removes compressed air
In moisture it is also more, energy consumption is also higher.Therefore under the premise of meeting requirement, manifold compressed airs are improved
Dew-point temperature can reduce the energy consumption of compressed-air drier.
Invention content
That it is an object of the present invention to overcome the above-mentioned drawbacks of the prior art and provide a kind of drying effects is good, more
Add energy-efficient drying system and its control method for compressed gas.
The purpose of the present invention can be achieved through the following technical solutions：A kind of drying system for compressed gas, this is dry
For drying system for drying the compressed gas that compressor is prepared, which includes sequentially connected heat exchanger, gas-liquid separator, more
A drying unit being arranged in parallel and the compressed gas connected with the outlet of all drying units are responsible for, the heat exchanger and compressor
Connection, each drying unit include the drier of two parallel connections and only one work, the outlet of every drier
Equipped with single machine dew point hygrometer, the compressed gas supervisor is equipped with manifold dew point hygrometers.The present invention is supervised in real time by adding manifold dew point hygrometers
The dew-point temperature for controlling compressed gas supervisor, avoids that dew-point temperature is too low to bring unnecessary energy waste.
The air inlet of two driers of each drying unit is equipped with solenoid valve, and the drying system is equipped with and is used for
The controller of solenoid valve opening and closing is controlled, the controller is connect with single machine dew point hygrometer and manifold dew point hygrometers.It is controlled by controller
The switch of solenoid valve processed more automates to realize the switching of drier.
The quantity of the drying unit is 3~5.
In-situ regeneration unit is equipped in every drier, the in-situ regeneration unit is connect with controller.
The in-situ regeneration unit includes the heating coil being arranged inside drier and is opened to control heating coil
The regeneration solenoid valve of pass, the heating coil are connect with heat exchanger, and the regeneration solenoid valve is connect with controller.Due to from compression
Compressed gas in machine out has higher temperature, so first heating the water in heating calancria with this part high-temperature gas, then
The water in drier is discharged using the higher water of temperature in heating calancria, reaches the purpose of desiccant regeneration.
The controller is PLC controller.
A kind of control method for the drying system of compressed gas as described above, includes the following steps：
(1) drier is connect with compressor in each drying unit, another drier is disconnected with compressor, is led to
The dew-point temperature that single machine dew point hygrometer monitors the exit compressed gas of each drier in connected state is crossed, is revealed by manifold
Point instrument monitors the dew-point temperature of compressed gas supervisor respectively；
(2) when meeting following any condition, the connecting line of a certain drier and compressor is disconnected, is opened simultaneously
The connecting line of another drier and compressor in same drying unit：
Condition a：Single machine dew point hygrometer at the dryer export shows that its single machine dew-point temperature is more than or equal to -20 DEG C；
Condition b：Single machine dew point hygrometer at the dryer export shows that its single machine dew-point temperature is less than -20 DEG C, and manifold reveals
Point instrument show compressed gas supervisor dew-point temperature be more than or equal to -25 DEG C, and the dew-point temperature at the dryer export be it is all with
It is highest in the drier of compressor connection.
Compared with prior art, beneficial effects of the present invention are embodied in following several respects：
(1) dew point monitoring for increasing manifold, has data analysis to manifold compressed air qualities.
(2) more drier parallel runnings make the control of pneumatic manifold dew-point temperature more close to setting value.
(3) be effectively improved the dew-point temperature of pneumatic manifold, avoid dew-point temperature it is too low bring it is unnecessary
Energy waste.
Description of the drawings
Fig. 1 is the connection diagram of the present invention；
Fig. 2 is the logical schematic of control method of the present invention.
Wherein, 1 is compressor, and 2 be drying unit, and 21 be drier, and 22 be solenoid valve, and 23 be single machine dew point hygrometer, and 24 are
Heating coil, 25 be regeneration solenoid valve, and 26 be check valve, and 3 are responsible for for compressed gas, and 31 be manifold dew point hygrometers, and 4 be heat exchanger, and 5 are
Gas-liquid separator.
Specific implementation mode
It elaborates below to the embodiment of the present invention, the present embodiment is carried out lower based on the technical solution of the present invention
Implement, gives detailed embodiment and specific operating process, but protection scope of the present invention is not limited to following implementation
Example.
Embodiment 1
A kind of drying system for compressed gas, the drying system are used to dry the compressed gas that compressor 1 is prepared,
Structure as shown in Figure 1, include the heat exchanger 4 being connect with compressor 1,5,4 drying units being arranged in parallel 2 of gas-liquid separator with
And the compressed gas supervisor 3 with the outlet of all drying units 2 connection, wherein compressed gas flows in the tube side of heat exchanger 4, cooling
Afterwards, condensed water is excluded in gas-liquid separator 5, the preliminary drying for realizing compressed gas.Each drying unit 2 include two parallel connections and
The outlet of the drier of only one work, every drier is equipped with single machine dew point hygrometer 23, and compressed gas supervisor 3 is equipped with manifold dew points
Instrument 31.The air inlet of two driers 21 of each drying unit 2 is equipped with solenoid valve 22, and drying system is equipped with for controlling electricity
The PLC controller that magnet valve 22 is opened and closed, PLC controller are connect with single machine dew point hygrometer 23 and manifold dew point hygrometers 31.
In-situ regeneration unit is equipped in every drier 21, in-situ regeneration unit includes sequentially connected regeneration solenoid valve
25, heating calancria 24 and check valve 26, wherein regeneration solenoid valve 2 and check valve 26 are imported and exported with the shell side of heat exchanger connect respectively
It connects, and regeneration solenoid valve 25 is connect with PLC controller.When a certain drier 21 needs regeneration, it is dry that PLC controller controls this
21 corresponding regeneration solenoid valve 25 of dry device is opened, and using the drier in hot water heat drier 21, realizes the regeneration of drier；
Meanwhile closing another 21 corresponding regeneration solenoid valve 25 of drier in same drying unit.
When single machine dew point hygrometer 23 detects dew-point temperature >=-20 DEG C of 21 exit gas of drier corresponding to it, PLC controls
Device processed controls the in-situ regeneration that the 21 corresponding solenoid valve 22 of drier closes and agent is dried by in-situ regeneration unit, together
When, the solenoid valve that another drier in same drying unit is in the drier 21 is opened.
Or when manifold dew point hygrometers 31 detect dew-point temperature >=-25 DEG C of compressed gas supervisor 3, then 4 single machine dew point hygrometers
The 23 highest driers 21 of dew-point temperature detected, PLC controller control the 21 corresponding solenoid valve 22 of drier pass
The in-situ regeneration of agent is closed and is dried by in-situ regeneration unit, meanwhile, it is in same drying unit with the drier 21
The solenoid valve of another drier open, specific control logic is as shown in Figure 2.
Claims (7)
1. a kind of drying system for compressed gas, the drying system is special for drying the compressed gas that compressor is prepared
Sign is, the system include sequentially connected heat exchanger, gas-liquid separator, multiple drying units being arranged in parallel and with it is all
The compressed gas supervisor of drying unit outlet connection, the heat exchanger are connect with compressor, and each drying unit includes two
The outlet of in parallel and only one work drier, every drier is equipped with single machine dew point hygrometer, the compressed gas supervisor
Equipped with manifold dew point hygrometers.
2. a kind of drying system for compressed gas according to claim 1, which is characterized in that each drying unit
The air inlets of two driers be equipped with solenoid valve, the drying system is equipped with the controller for controlling solenoid valve opening and closing,
The controller is connect with single machine dew point hygrometer and manifold dew point hygrometers.
3. a kind of drying system for compressed gas according to claim 2, which is characterized in that the number of the drying unit
Amount is 3~5.
4. a kind of drying system for compressed gas according to claim 2, which is characterized in that in every drier
It is equipped with in-situ regeneration unit, the in-situ regeneration unit is connect with controller.
5. a kind of drying system for compressed gas according to claim 4, which is characterized in that the in-situ regeneration unit
Including the heating coil being arranged inside drier and to control the regeneration solenoid valve of heating coil switch, the heating dish
Pipe is connect with heat exchanger, and the regeneration solenoid valve is connect with controller.
6. according to a kind of any drying system for compressed gas of claim 2~5, which is characterized in that the control
Device is PLC controller.
7. a kind of control method as described in Claims 1 to 5 is any for the drying system of compressed gas, which is characterized in that packet
Include following steps：
(1) drier is connect with compressor in each drying unit, another drier is disconnected with compressor, passes through list
Machine dew point hygrometer monitors the dew-point temperature of the exit compressed gas of each drier in connected state, passes through manifold dew point hygrometers
The dew-point temperature of monitoring compressed gas supervisor respectively；
(2) when meeting following any condition, the connecting line of a certain drier and compressor is disconnected, is opened simultaneously same
The connecting line of another drier and compressor in drying unit：
Condition a：Single machine dew point hygrometer at the dryer export shows that its single machine dew-point temperature is more than or equal to -20 DEG C；
Condition b：Single machine dew point hygrometer at the dryer export shows that its single machine dew-point temperature is less than -20 DEG C, and manifold dew point hygrometers
Show that the dew-point temperature of compressed gas supervisor is more than or equal to -25 DEG C, and the dew-point temperature at the dryer export is all and compression
It is highest in the drier of machine connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810662573.9A CN108579352A (en) | 2018-06-25 | 2018-06-25 | A kind of drying system and its control method for compressed gas |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810662573.9A CN108579352A (en) | 2018-06-25 | 2018-06-25 | A kind of drying system and its control method for compressed gas |
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| CN108579352A true CN108579352A (en) | 2018-09-28 |
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| CN201810662573.9A Pending CN108579352A (en) | 2018-06-25 | 2018-06-25 | A kind of drying system and its control method for compressed gas |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111054190A (en) * | 2019-12-28 | 2020-04-24 | 宁波杭州湾新区祥源动力供应有限公司 | Linkage control system and method for compressed air dew point temperature main pipe |
| EP3797856A1 (en) * | 2019-09-30 | 2021-03-31 | Ingersoll-Rand Industrial U.S., Inc. | Multi-unit adaptable compressed air drying system |
| CN114384119A (en) * | 2021-12-11 | 2022-04-22 | 首钢京唐钢铁联合有限责任公司 | Method and device for detecting dew point of compressed air in steel plant |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3797856A1 (en) * | 2019-09-30 | 2021-03-31 | Ingersoll-Rand Industrial U.S., Inc. | Multi-unit adaptable compressed air drying system |
| CN111054190A (en) * | 2019-12-28 | 2020-04-24 | 宁波杭州湾新区祥源动力供应有限公司 | Linkage control system and method for compressed air dew point temperature main pipe |
| CN114384119A (en) * | 2021-12-11 | 2022-04-22 | 首钢京唐钢铁联合有限责任公司 | Method and device for detecting dew point of compressed air in steel plant |
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