CN1210748A - Automatic change-over system for purified air drier tower and its controlling program - Google Patents
Automatic change-over system for purified air drier tower and its controlling program Download PDFInfo
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- CN1210748A CN1210748A CN 98102892 CN98102892A CN1210748A CN 1210748 A CN1210748 A CN 1210748A CN 98102892 CN98102892 CN 98102892 CN 98102892 A CN98102892 A CN 98102892A CN 1210748 A CN1210748 A CN 1210748A
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- air drier
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Abstract
The control system includes two purified air drier towers, two wind-opened valves and two wind-closed valves connected to those purified air drier towers and pneumatic change valve and delayed change valve assembly for the control and change-over of the above said valves. The control system is flexible, safe and reliable, can result in stable purified air pressure, and is suitable for various purified air drier towers.
Description
The present invention relates to the voltage stabilizing automatic switching control system and the control program thereof of the control system of purified air drier tower, particularly purified air drier tower.
The standard set-up of drier generally comprises two dryer column and relevant by-pass valve control, the drier that can absorb moisture content wherein is housed, used drier is generally molecular solid, for example some well-known types comprise molecular sieve, silica gel and activated alumina, it can make the hydrone electric attraction and be adsorbed in the molecular solid, can regenerate after reaching capacity.These drier can adsorb 20% of the own dry weight of moisture content, and silica gel, the molecular sieve that adsorbed moisture content reaches capacity behind the state, needs regular regeneration, and the drier that has made moisture content saturated recovers active, reaches original state.So two dryer column are in drying and the regeneration handoff procedure all the time, especially in the handoff procedure of purified air drier tower, the pressure oscillation of purification wind that enters process pipelines by dryer column is very big, and switch dumb, directly have influence on the dryer column effect and control malfunctioning, result in hand cramps and difficulty to production, until stopping production.
The object of the invention is in order to overcome above-mentioned shortcoming, the inventor through thoroughgoing and painstaking research for many years and long-term industrial practice develop a kind of switching nimbly and freely, safe and reliable stable automatic switching control system and the system control program thereof of purification wind pressure.The wind of particularly controlling purified air drier is opened the action that valve and wind close valve, makes purified air drier tower by certain hour automatic switching control system and control program thereof in sequence.Fig. 1 is the schematic diagram of purified air drier tower.Fig. 2 is purified air drier tower automatic switchover control Luo Jitu.Fig. 3 is that purified air drier tower enters process pipelines purification wind pressure fluctuation comparative graph.
The automatic switching control system of purified air drier tower of the present invention comprises two purified air drier tower A and B, with be connected and two purified air drier towers that automatically switch are in the wind dry and regeneration that regularly hockets all the time and drive valve 1 and 4 and wind pass valve 2 and 3, and air operated reversing valve and the time-delay change valve device of directly controlling and switch above-mentioned valve 1-4, wherein said air operated reversing valve device preferably includes six air operated reversing valve CV
1, CV
2, CV
3, CV
4, CV
5, CV
6Air operated reversing valve CV
1-CV
5Control separately respectively wind open valve 1 and 4 and wind close valve 2 and 3, i.e. CV
1Air operated reversing valve control wind leaves valve 1, CV
2Air operated reversing valve control wind closes valve 2, CV
3Air operated reversing valve control wind closes valve 3, CV
4Air operated reversing valve control wind leaves valve 4; Air operated reversing valve CV
5Produce change action control air operated reversing valve CV
3Die, close valve 3, air operated reversing valve CV thereby open wind
6Snap action is controlled the gas circuit starting or is returned to original state.The number of described time-delay change valve device changes the delay time of number or adjustment time-delay change valve to increase or to reduce whole circulation cycle required time according to silica regeneration required time length in the purified air drier tower, the number of time-delay change valve preferably includes 12 time-delay change valves, and the The whole control Program time delay is preferably 10 minutes and sees Fig. 1 and Fig. 2.
Purified air drier tower automatic switchover control program comprises: (1) starting air operated reversing valve CV
6Begin ventilation, make air operated reversing valve CV
1With CV
2Ventilation, CV
3And CV
4Die.Driving wind drives valve 1 and wind pass valve 3 is opened, wind closes valve 2 opens valve 4 passes with wind, and purification wind enters purified air drier tower B through wind pass valve 3 to carry out entering process pipelines after the drying, makes it be in dry running status, and purified air drier tower A is in reproduced state, and silica gel is regenerated.(2) after the 1-4 time-delay change valve was delayed time 4 minutes, air operated reversing valve CV
1Die, wind is driven valve 1 and is closed; After the 5th time-delay change valve was delayed time 40 seconds, air operated reversing valve CV
2Die, wind closes valve 2 to be opened, and purifies wind and go into process pipelines after wind pass valve 2 is gone into purified air drier tower A, purifies wind pressure and does not fluctuate, and this moment, purified air drier tower A and B were in the dry running status.(3) after the 6th time-delay change valve was delayed time 20 seconds, air operated reversing valve CV
3With CV
4Ventilation, wind pass valve 3 cuts out, and wind is driven valve 4 and is opened, purify wind and from purified air drier tower B, excise, make purified air drier tower B be in reproduced state, the gas that the regeneration back produces, drive valve 4 through wind and enter atmosphere, purified air drier tower A still is in the dry running status.(4) after the 7-10 time-delay change valve was delayed time 4 minutes, air operated reversing valve CV
4Die, wind is driven valve 4 and is closed.Again after the 11st time-delay change valve time-delay 40 seconds, air operated reversing valve CV
5Action makes air operated reversing valve CV
3Die, wind closes valve 3 to be opened, and purifies wind and enter process pipelines after purified air drier tower B drying, and purified air drier tower A is in dry running status, purifies wind pressure in the process pipelines and does not fluctuate.(5) after the 12nd time-delay change valve was delayed time 20 seconds, air operated reversing valve CV
6Snap action; Make control loop get back to original state, i.e. air operated reversing valve CV
1With CV
2Ventilation, CV
3With CV
4Die, wind is driven valve 1 and is opened with wind pass valve 3, and wind closes valve 2 opens valve 4 passes with wind, purifies wind and closes to go in the pipeline after valve 3 enters purified air drier tower B through the wind of purification wind drying tower, and it is in the dry running status.Wind is driven valve 1,4 and is seen Table 1 with the sequence of movement table that wind closes valve 2,3.
The whole control program cycle process totally 10 minutes, length according to the silica regeneration time in the dryer column, can be suitably by the switch time of adjusting time-delay change valve or the time that number is adjusted the control program cyclic process, so move in circles and carry out, can guarantee to purify in the process pipelines wind pressure does not fluctuate, can guarantee that again silica gel has sufficiently long time-interleaved regeneration among purified air drier tower A and the B, be a kind of switching nimbly and freely, safe and reliable.Industrial production obtains the stable automatic switching control system and the control program thereof of purification wind pressure of excellent results.Purify wind pressure in the process pipelines and scheme over time as shown in Figure 3, wherein curve a, b are respectively example of the present invention and comparative example pressure curve.Table 1: valve sequence list 1,2,3,4 actuation time
| ???1 | ???2 | ???3 | ???4 | |
| Original state O | Open | Close | Open | Close |
| ??????4 | Close | Close | Open | Close |
| ?????440 | Close | Open | Open | Close |
| ??????5 | Close | Open | Close | Open |
| ??????9 | Close | Open | Close | Close |
| ?????940 | Close | Open | Open | Close |
| ?????10 | Open | Close | Open | Close |
To be illustrated with the preferred embodiment that preferably is combined into the control program of automatic switching control system below by six air operated reversing valves and 12 time-delay change valves, the present invention is not limited to this example, and those skilled in the art does any change within the scope of the invention.
In original state, promptly this handover control system starts air operated reversing valve CV
6When beginning to ventilate, make air operated reversing valve CV
1With CV
2Ventilation, CV
3And CV
4Die, driving wind drives valve 1 and wind pass valve 3 is opened, and wind closes valve 2 opens valve 4 passes with wind.Purification wind enters purified air drier tower B by purification airduct line through wind pass valve 3 makes it be in dry running status, carries out entering pipeline after the drying; Purified air drier tower A is in reproduced state, and silica gel is regenerated.After the 1st, 2,3,4 time-delay change valves were delayed time 4 minutes, air operated reversing valve CV
1Die, wind is driven valve 1 and is closed; After the 5th time-delay change valve was delayed time 40 seconds, air operated reversing valve CV
2Die, wind closes valve 2 to be opened, and purifies wind and enters process pipelines simultaneously after wind pass valve 2 and 3 is gone into purified air drier tower A and B drying, purifies wind pressure in the process pipelines and does not fluctuate.After the 6th time-delay change valve was delayed time 20 seconds, air operated reversing valve CV
3With CV
4Ventilation, wind pass valve 3 cuts out, and wind is driven valve 4 and is opened, and purifies wind and excises from purified air drier tower B, makes purified air drier tower B be in reproduced state, and wherein silica gel is regenerated, and the gas that the regeneration back produces is driven valve 4 through wind and is entered atmosphere.This moment, purified air drier tower A still was in the dry moving row state.After the 7-10 time-delay change valve is delayed time 4 minutes (respectively delaying time 1 fen), air operated reversing valve CV
4Die, wind is driven valve 4 and is closed.Again after the 11st time-delay change valve time-delay 40 seconds, air operated reversing valve CV
5Action makes air operated reversing valve CV
3Die, wind closes valve 3 to be opened, and purifies wind and enter process pipelines after purified air drier tower B drying; This moment, purified air drier tower A still was in dry running status, purified wind pressure in the process pipelines and did not fluctuate.After the 12nd time-delay change valve was delayed time 20 seconds, air operated reversing valve CV
6Snap action makes control loop get back to original state.The whole control program cycle process totally 10 minutes purifies wind and purifies the wind pressure fluctuation as Fig. 3-a in process pipelines.
Comparative example 1
In original state, air operated reversing valve CV
1With CV
2Ventilation, CV
3With CV
4Die, driving wind drives valve 1 and wind pass valve 3 is opened, and wind closes valve 2 and wind is opened valve 4 passes, and purification wind enters purified air drier tower B by wind pass valve 3 to carry out entering pipeline after the drying, and purified air drier tower A is in the regeneration running status, and wherein silica gel is regenerated.After the 1-4 time-delay change valve was delayed time 4 fens, air operated reversing valve CV
1Die, wind is driven valve 1 and is closed valve; After the 5th time-delay change valve was delayed time 40 seconds, air operated reversing valve CV
2Die, wind closes valve 2 to be opened, after 6 time-delay change valves were delayed time 20 seconds, and air operated reversing valve CV
3Ventilation, CV
4Ventilation, wind is driven valve 4 and is opened, and wind closes valve 3 closes, after the 7-10 time-delay change valve was delayed time 4 fens, air operated reversing valve CV
4Die, wind is driven valve 4 and is closed, but after the o.11 time-delay change valve was delayed time 1 minute, system resets, above-mentioned four valves change on off state simultaneously, its apoplexy closes valve 2 and 3 two intake valves and wind is driven valve 1 and 4 two air bleeding valves carry out switch simultaneously, so it is very big to purify the wind pressure fluctuation in the processing pipe network, sees curve b among Fig. 3.Valve 1-4 sequence list actuation time sees Table 2.Table 2: valve sequence list 1,2,3,4 actuation time
| ???1 | ???2 | ???3 | ???4 | |
| Original state O | Open | Close | Open | Close |
| ?????4 | Close | Close | Open | Close |
| ????440 | Close | Open | Open | Close |
| ?????5 | Close | Open | Close | Open |
| ?????9 | Close | Open | Close | Close |
| ?????10 | Open | Close | Open | Close |
Claims (5)
1, the automatic switching control system of purified air drier tower, this system comprises two purified air drier tower A and B, drives valve 1,4 and wind pass valve 2,3 with the wind that is connected two purified air drier towers; And air operated reversing valve and the time-delay change valve device of directly controlling and switch described valve 1-4.
2, according to the automatic switching control system of the purified air drier tower of claim 1, wherein said air operated reversing valve device is six air operated reversing valve: CV
1, CV
2, CV
3, CV
4, CV
5, CV
6, CV wherein
1, CV
2, CV
3, CV
4, CV
5Control wind respectively separately and drive valve 1,4 and wind pass valve 2,3; CV
6Snap action is controlled the starting of whole loop or is returned to original state.
3, according to the automatic switching control system of the purified air drier tower of claim 1, the number of wherein said time-delay change valve device changes number according to silica regeneration required time length in the purified air drier tower or adjusts the delay time of time-delay change valve, to increase or to reduce the required time in whole circulation cycle.
4, according to the automatic switching control system of the purification air dryer tower of claim 3, wherein said time-delay change valve device is 12 time-delay change valves.
5, the control program of the automatic switching control system of purified air drier tower, this program comprises:
(1), starting air operated reversing valve CV
6Begin ventilation, make air operated reversing valve CV
1With CV
2Ventilation, CV
3And CV
4Die; Driving wind drives valve 1 and wind pass valve 3 is opened, wind closes valve 2 and wind is opened valve 4 passes, and purification wind enters purified air drier tower B through wind pass valve 3 to carry out entering process pipelines after the drying, makes it be in dry running status, and purified air drier tower A is in reproduced state, and silica gel is regenerated;
(2), after 1-4 time-delay change valve time-delay 4 minutes, air operated reversing valve CV
1Die, wind is driven valve 1 and is closed; After the 5th time-delay change valve was delayed time 40 seconds, air operated reversing valve CV
2Die, wind closes valve 2 to be opened, and purifies wind and go into process pipelines after wind pass valve 2 is gone into purified air drier tower A, and purified air drier tower A and B are in dry running status;
(3), after the 6th time-delay change valve time-delay 20 seconds, air operated reversing valve CV
3With CV
4Ventilation, wind pass valve 3 cuts out, and wind is driven valve 4 and is opened, purifying wind excises from purified air drier tower B, this purified air drier tower B is in reproduced state, and the gas that the regeneration back produces is driven valve 4 through wind and entered atmosphere, and purified air drier tower A still is in the dry running status;
(4), after 7-10 time-delay change valve time-delay 4 minutes, air operated reversing valve CV
4Die, wind is driven valve 4 and is closed, again air operated reversing valve CV after the 11st time-delay change valve was delayed time 40 seconds
5Action makes air operated reversing valve CV
3Die, wind closes valve 3 to be opened, and purifies wind and enter process pipelines after purified air drier tower B drying, and purified air drier tower A is in dry running status;
(5), after the 12nd time-delay change valve time-delay 20 seconds, air operated reversing valve CV
6Snap action makes control loop get back to original state, and the The whole control Program time delay is 10 minutes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98102892A CN1079277C (en) | 1998-07-22 | 1998-07-22 | Automatic change-over system for purified air drier tower and its controlling program |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN98102892A CN1079277C (en) | 1998-07-22 | 1998-07-22 | Automatic change-over system for purified air drier tower and its controlling program |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1210748A true CN1210748A (en) | 1999-03-17 |
| CN1079277C CN1079277C (en) | 2002-02-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN98102892A Expired - Fee Related CN1079277C (en) | 1998-07-22 | 1998-07-22 | Automatic change-over system for purified air drier tower and its controlling program |
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|---|---|
| CN (1) | CN1079277C (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101455935B (en) * | 2008-12-15 | 2011-02-09 | 广州市汉粤净化科技有限公司 | Combination type drying machines controller |
| CN101450276B (en) * | 2008-12-15 | 2011-09-14 | 广州市汉粤净化科技有限公司 | Adsorption type drier controller |
| CN108278492A (en) * | 2018-01-22 | 2018-07-13 | 上海至纯洁净系统科技股份有限公司 | A kind of method and device keeping manufacturing process handoff procedure pressure stability |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4375367A (en) * | 1981-04-20 | 1983-03-01 | Air Products And Chemicals, Inc. | Lower power, freon refrigeration assisted air separation |
| CN1027737C (en) * | 1986-02-14 | 1995-03-01 | 气动技术有限公司 | Gas drying apparatus |
| CN88203057U (en) * | 1988-02-29 | 1988-07-27 | 北京市燕山石化公司化工一厂 | Automatic control device of double-tower desiccator |
-
1998
- 1998-07-22 CN CN98102892A patent/CN1079277C/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101455935B (en) * | 2008-12-15 | 2011-02-09 | 广州市汉粤净化科技有限公司 | Combination type drying machines controller |
| CN101450276B (en) * | 2008-12-15 | 2011-09-14 | 广州市汉粤净化科技有限公司 | Adsorption type drier controller |
| CN108278492A (en) * | 2018-01-22 | 2018-07-13 | 上海至纯洁净系统科技股份有限公司 | A kind of method and device keeping manufacturing process handoff procedure pressure stability |
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| Publication number | Publication date |
|---|---|
| CN1079277C (en) | 2002-02-20 |
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