CN103566710B - A kind of multi-tower control method for pressure-swing absorption apparatus - Google Patents
A kind of multi-tower control method for pressure-swing absorption apparatus Download PDFInfo
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Abstract
The invention discloses the present invention needs to carry out pressure-variable adsorption simultaneously adsorption tower quantity according to scene, thus determine the corresponding operational mode of all adsorption towers, by the characteristic of binary number itself, by corresponding for the adsorption tower of varying number a set of different binary number, in the circulation comparison process of multiple binary number, automatically the value after comparison is periodically assigned to the corresponding valve of corresponding adsorption tower, the adsorption system that all adsorption towers are formed completely Automatic Optimal is run; And determine whether this adsorption tower exists fault according to the whether timely feedback information of each adsorption tower respective valves, the mode changing valve operation pattern is then adopted first to excise fault tower when there is fault, remove fault follow-up reforwarding row, to make in this pressure-swing absorption apparatus no longer operation troubles tower.Control method of the present invention has born Memorability and expansion is convenient, simple, has and switches simple, easy to operate, broad-spectrum feature, is suitable for promoting the use of.
Description
Technical field
The present invention relates to a kind of control method when being applied to that in pressure-swing absorption apparatus, multiple adsorption tower automatically switches, specifically a kind of character cycle method that utilizes distributes all recycle column needing to run rationally to make the operation of whole pressure-swing absorption apparatus energy efficient stable and can accomplish the multi-tower control method of safe excision fault tower when fault.
Background technology
Pressure-variable adsorption (PSA) utilizes each component of the gas difference of characterization of adsorption and the pressure-dependent principle of adsorbance on the sorbent, realized the separation of gas by periodic pressure change.Along with Chinese society rapid development of economy, environmental energy problem becomes increasingly conspicuous, pressure-variable adsorption (PSA) process is short because of its start-up time, start-stop car is convenient, energy consumption is little and operating cost is low, and automaticity is high, safeguards simple, the features such as the little and civil engineering costs of floor space is low, are approved widely and are used.
Given this, pressure-swing absorption apparatus is applied among various chemical processes.If hydrogen manufacturing, nitrogen processed etc. are all by a large amount of application and popularization.And in order to improve the operational efficiency of adsorption tower, be all the absorption that multitower carries out unstrpped gas simultaneously, do not conflict mutually.Common is 4 towers, 5 towers, 6 towers and more.How can realize more efficiently running while multitower is asked, how can cut away fault tower when breaking down rapidly and make the most stable operation of device, be the problem needing most solution, therefore need a kind of effective method to ensure.
Summary of the invention
The object of the invention is for prior art Problems existing, provide a kind of and switch simple, easy to operate, the broad-spectrum multi-tower control method for pressure-swing absorption apparatus.
The object of the invention is to solve by the following technical programs:
For a multi-tower control method for pressure-swing absorption apparatus, it is characterized in that the step of described control method is as follows:
Step one, first determine corresponding operational mode by the quantity of adsorption tower, then generate one to should the initial binary number of valve according to the on off state of different valve in adsorption tower each in operational mode;
Step 2, then provide a first place for " 1 " and follow-up be " 0 " the relocatable binary number identical with the figure place of initial binary number, the computing adopting relocatable binary number and initial binary number to carry out logical "and" obtains one-period binary, the cycle binary of each valve is judged, the initial valve position representing this valve time numeral " 1 " is had to be " opening " or " controlled " state in cycle binary, entirely then represent that the initial valve position of this valve is "Off" state for time " 0 " in cycle binary, namely correct valve position when whole valve is initial on all adsorption towers is obtained, correct valve position signal time initial for above-mentioned valve is passed to corresponding valve on each adsorption tower and make its action,
Step 3, when after cycle one end of run, " 1 " in relocatable binary number in step 2 is offset one to the right and " 0 " of tail position moves to first place, generate new relocatable binary number, then the computing adopting new relocatable binary number and initial binary number to proceed logical "and" obtains cycle two binary number, the correct valve position of respective valves on each adsorption tower when adopting the method described in step 2 to judge to draw two operation phase of cycle to cycle two binary number, and to be given by the signal transmission of this correct valve position on each adsorption tower corresponding valve with the state of switch valve,
Step 4, repeat step 3 until " 1 " in relocatable binary number is displaced to the end of this relocatable binary number and the state completing respective valves switches, then adsorption tower completes the handoff procedure of four kinds of states, and can carry out the cyclic process of adsorption tower four kinds of states next time according to step 2 ~ step 4.
In described step 2 ~ step 4, when not receiving the valve position feedback signal of respective valves on adsorption tower in official hour, then represent that this valve breaks down, now all valve transfer of this fault tower can make the circulation of deactivating of this fault tower overhaul to manual mode by control system, directly all valve transfer of this adsorption tower are proceeded the cyclic process of step 2 ~ step 4 after trouble shooting to auto state.
In described step 2 ~ step 4, when not receiving the valve position feedback signal of respective valves on adsorption tower in official hour, then represent that this valve breaks down, now all valve transfer of this fault tower can make the circulation of deactivating of this fault tower overhaul to manual mode by control system, the circulation of above-mentioned relocatable binary number is first suspended after trouble shooting, then by all valve transfer of this adsorption tower to auto state, the circulation starting above-mentioned relocatable binary number then this adsorption tower can proceed the cyclic process of step 2 ~ step 4.
In described step one, the initial binary number of each valve is determined according to the permutation and combination order of each adsorption tower four kinds of states in operational mode, and four kinds of states refer to absorption, boosting, rinse and inverse put.
When adsorption tower in described step one is in adsorbed state, the INO of adsorption tower, desorb valve are closed and air outlet valve is controlled; When adsorption tower is in inverse put state, the intake valve of adsorption tower cuts out, desorb valve is controlled and air outlet valve cuts out; When adsorption tower is in flushing state, the intake valve of adsorption tower cuts out, desorb valve is controlled and air outlet valve is controlled; When adsorption tower is in pressure-increasning state, the intake valve of adsorption tower cuts out, desorb valve is cut out and air outlet valve is controlled; In above-mentioned four kinds of states, adopt " ON or 1 " to represent valve open or controlled, " OFF or 0 " represents valve closing.
The figure place of the initial binary number in described step one is no less than four.
The present invention has the following advantages compared to existing technology:
The present invention needs the adsorption tower quantity of simultaneously carrying out pressure-variable adsorption according to scene, thus determine the corresponding operational mode of all adsorption towers, by the characteristic of binary number itself, by corresponding for the adsorption tower of varying number a set of different binary number, in the circulation comparison process of multiple binary number, automatically the value after comparison is periodically assigned to the corresponding valve of corresponding adsorption tower, the adsorption system that all adsorption towers are formed completely Automatic Optimal is run; And determine whether this adsorption tower exists fault according to the whether timely feedback information of each adsorption tower respective valves, the mode changing valve operation pattern is then adopted first to excise fault tower when there is fault, to make in this pressure-swing absorption apparatus no longer operation troubles tower, remove the follow-up reforwarding row of fault.
Control method of the present invention is owing to adopting the character cycle based on binary number, this control method is made to have born Memorability, when valve breaks down, " 1 " circulation in relocatable binary number stops, and valve keeps, and removes fault late gate and continues to run, then " 1 " circulation continues, if desired whole device reruns, and namely initializes, then " 1 " in relocatable binary number resets to first place; Secondly the expansion of this control method is convenient, can be used for the adsorption tower technological transformation increase and decrease of all pressure-swing absorption apparatus and does not need to change a large amount of automatic programs, only need adjust binary number and circulation timei according to valve state, simple; This control method can be expanded for various self-circulation system, can implement to use in all kinds of environmental protection project, and this control method has simple, easy to operate, the broad-spectrum feature of switching, is suitable for promoting the use of.
Detailed description of the invention
Below in conjunction with embodiment, the present invention is further illustrated.
For a multi-tower control method for pressure-swing absorption apparatus, the step of this control method is as follows:
Step one, first determine corresponding operational mode by the quantity of adsorption tower, then generate one to should the initial binary number of valve according to the on off state of different valve in adsorption tower each in operational mode, the figure place of this initial binary number is no less than four;
Step 2, then provide a first place for " 1 " and follow-up be " 0 " the relocatable binary number identical with the figure place of initial binary number, the computing adopting relocatable binary number and initial binary number to carry out logical "and" obtains one-period binary, the cycle binary of each valve is judged, the initial valve position representing this valve time numeral " 1 " is had to be " opening " or " controlled " state in cycle binary, entirely then represent that the initial valve position of this valve is "Off" state for time " 0 " in cycle binary, namely correct valve position when whole valve is initial on all adsorption towers is obtained, correct valve position signal time initial for above-mentioned valve is passed to corresponding valve on each adsorption tower and make its action,
Step 3, when after cycle one end of run, " 1 " in relocatable binary number in step 2 is offset one to the right and " 0 " of tail position moves to first place, generate new relocatable binary number, then the computing adopting new relocatable binary number and initial binary number to proceed logical "and" obtains cycle two binary number, the correct valve position of respective valves on each adsorption tower when adopting the method described in step 2 to judge to draw two operation phase of cycle to cycle two binary number, and to be given by the signal transmission of this correct valve position on each adsorption tower corresponding valve with the state of switch valve,
Step 4, repeat step 3 until " 1 " in relocatable binary number is displaced to the end of this relocatable binary number and the state completing respective valves switches, then adsorption tower completes the handoff procedure of four kinds of states, and can carry out the cyclic process of adsorption tower four kinds of states next time according to step 2 ~ step 4.
In step 2 ~ step 4, when not receiving the valve position feedback signal of respective valves on adsorption tower in official hour, then represent that this valve breaks down, now all valve transfer of this fault tower can make the circulation of deactivating of this fault tower overhaul to manual mode by control system, directly all valve transfer of this adsorption tower are proceeded the cyclic process of step 2 ~ step 4 after trouble shooting to auto state; Also first can suspend the circulation of above-mentioned relocatable binary number in addition after trouble shooting, then by all valve transfer of this adsorption tower to auto state, the circulation starting above-mentioned relocatable binary number then this adsorption tower can proceed the cyclic process of step 2 ~ step 4.
In control method, the initial binary number of each valve is determined according to the permutation and combination order of each adsorption tower four kinds of states in operational mode, and specifically, under regular situation, each adsorption tower has four kinds of states, namely adsorbs, boosts, rinses and inverse put.Intake valve, desorb valve, air outlet valve that each adsorption tower is joined correspond to different state, and during as adsorbed state, according to principle INO, desorb valve is cut out and air outlet valve is controlled; During inverse put state, intake valve cuts out, desorb valve is controlled and air outlet valve cuts out; During flushing state, intake valve cuts out, desorb valve is controlled and air outlet valve is controlled; During pressure-increasning state, intake valve cuts out, desorb valve is cut out and air outlet valve is controlled.The action situation of valve is often planted when listing various state according to this present situation; The intake valve of single tower, desorb valve, air outlet valve state can be set as ON and OFF, wherein ON represents valve open or controlled, OFF represents valve closing, for adopting the on off state of binary number representation valve, then " ON " is set to " 1 ", " OFF " be set to " 0 ", following table is valve state tables corresponding to single adsorption tower four states first.
The valve state table that the single adsorption tower of table one four states are corresponding
Embodiment one
The present embodiment adopts four to run with the adsorption tower of ABCD name respectively simultaneously, for reducing device load as far as possible, improves unit efficiency, can when A adsorption tower adsorbs, and B adsorption tower boosts, and C adsorption tower rinses, and D adsorption tower carries out inverse put.And each tower carries out while being independent of each other according to the order of absorption, boosting, flushing, inverse put successively.The situation of all adsorption towers is listed completely, operational mode table while when drawing four tower Optimal States:
Operational mode while during table two four adsorption tower Optimal States
Associative list one and table two according to above-mentioned control method can list four adsorption towers totally 12 valves need the correct status of action, the binary condition table corresponding to four adsorption towers full circulation operation process as shown in Table 3:
Binary condition table corresponding to table three four adsorption towers full circulation operation process
The initial binary number of 12 4 can be seen from top to bottom very clearly in table; This defines the relocatable binary number 1000 of four one by one, AND operation is carried out with 12 initial binary numbers successively by relocatable binary number 1000, after computing terminates, to 12 new binary numbers be obtained as cycle binary, the binary number in cycle one is thought ON according to there being one to be 1, and all the other are the principle of OFF entirely, just open-and-shutly can draw the valvular correct initial valve position of institute when starting adsorption tower, these signals are assigned to corresponding valve, make its action; After an operation phase terminates, according to the cycle time set before, enter the next state operation phase, then " 1 " in relocatable binary number 1000 is offset one to the right and become 0100, AND operation is carried out again with 12 initial binary numbers, valve event correspondence table shown in generating period two, according to such rule, 0010,0001 comparison value being latter two cycle.When reentering 1000, four towers enter next cycle period; This control method achieves the optimized running of four towers.If be in operation, suppose that fault has appearred in B adsorption tower, at once by valve Close All corresponding for B adsorption tower, can clear discovery can be had no effect by whole cyclic process according to table three, undisturbed completely.The action command of B adsorption tower have issued, but owing to cutting Non-follow control, so B adsorption tower can not action; Thus start to overhaul, after the maintenance of B adsorption tower, only need the circulation of floating binary number under suspending when a release on other towers according to actual condition, the corresponding valve of B adsorption tower is all cut automatically, then it is just passable to continue program; Or directly cut automatically under the condition that operating mode allows, do not suspend the circulation of relocatable binary number.Also can will restart from A adsorption tower as required in addition, namely when operating mode allows, relocatable binary number is initialized, and namely relocatable binary number 1000 carries out comparison again, is assigned to each valve just passable.The incision of B adsorption tower, excise and all can not have an impact to whole system.When driving, can open successively from single adsorption tower, all the other each adsorption towers are automatic from being manually cut to successively according to the time point of step sequence and state, and whole system is by complete automatic cycling operating afterwards backward.
Embodiment two
The present embodiment adopts six to run with the adsorption tower of ABCDEF name respectively simultaneously, and the control method of six adsorption towers is the same with the control method of four adsorption towers.First to list when six towers carry out systemic circulation operational mode while optimization, this operational mode as shown in Table 4:
Operational mode while during table four six adsorption tower Optimal States
Because each adsorption tower divide into four megastages comprising 20 little stages, therefore the figure place of initial binary number is 20, and six all valves of adsorption tower carry out initial binary number corresponding to a systemic circulation overall process by shown in table five:
Table five six adsorption towers carry out the initial binary number table corresponding to a systemic circulation overall process
According to the initial binary number in table five, determine that 10000000000000000000 for the relocatable binary number of initial comparison, carries out comparison successively according to above-mentioned control method, then gives corresponding valve by the result drawn at every turn.When there being adsorption tower to break down in running, adopting the method in embodiment one that valve corresponding for fault is cut to manual mode, the normal operation of other towers can not be affected.When driving, can open successively from single adsorption tower, all the other each adsorption towers are automatic from being manually cut to successively according to the time point of step sequence and state, and whole system is by complete automatic cycling operating afterwards backward.
The present invention needs the adsorption tower quantity of simultaneously carrying out pressure-variable adsorption according to scene, thus determine the corresponding operational mode of all adsorption towers, by the characteristic of binary number itself, by corresponding for the adsorption tower of varying number a set of different binary number, in the circulation comparison process of multiple binary number, automatically the value after comparison is periodically assigned to the corresponding valve of corresponding adsorption tower, the adsorption system that all adsorption towers are formed completely Automatic Optimal is run; And determine whether this adsorption tower exists fault according to the whether timely feedback information of each adsorption tower respective valves, the mode changing valve operation pattern is then adopted first to excise fault tower when there is fault, to make in this pressure-swing absorption apparatus no longer operation troubles tower, remove the follow-up reforwarding row of fault.This control method is owing to adopting the character cycle based on binary number, this control method is made to have born Memorability, when valve breaks down, " 1 " circulation in relocatable binary number stops, and valve keeps, and removes fault late gate and continues to run, then " 1 " circulation continues, if desired whole device reruns, and namely initializes, then " 1 " in relocatable binary number resets to first place; Secondly the expansion of this control method is convenient, can be used for the adsorption tower technological transformation increase and decrease of all pressure-swing absorption apparatus and does not need to change a large amount of automatic programs, only need adjust binary number and circulation timei according to valve state, simple; This control method can be expanded for various self-circulation system, can implement to use in all kinds of environmental protection project, and this control method has simple, easy to operate, the broad-spectrum feature of switching, is suitable for promoting the use of.
Above embodiment is only and technological thought of the present invention is described, can not limit protection scope of the present invention with this, every technological thought proposed according to the present invention, and any change that technical scheme basis is done, all falls within scope; The technology that the present invention does not relate to all is realized by prior art.
Claims (5)
1., for a multi-tower control method for pressure-swing absorption apparatus, it is characterized in that the step of described control method is as follows:
Step one, first determine corresponding operational mode by the quantity of adsorption tower, then generate one to should the initial binary number of valve according to the on off state of different valve in adsorption tower each in operational mode;
Step 2, then provide a first place for " 1 " and follow-up be " 0 " the relocatable binary number identical with the figure place of initial binary number, the computing adopting relocatable binary number and initial binary number to carry out logical "and" obtains one-period binary, the cycle binary of each valve is judged, the initial valve position representing this valve time numeral " 1 " is had to be " opening " or " controlled " state in cycle binary, entirely then represent that the initial valve position of this valve is "Off" state for time " 0 " in cycle binary, namely correct valve position when whole valve is initial on all adsorption towers is obtained, correct valve position signal time initial for above-mentioned valve is passed to corresponding valve on each adsorption tower and make its action,
Step 3, when after cycle one end of run, " 1 " in relocatable binary number in step 2 is offset one to the right and " 0 " of tail position moves to first place, generate new relocatable binary number, then the computing adopting new relocatable binary number and initial binary number to proceed logical "and" obtains cycle two binary number, the correct valve position of respective valves on each adsorption tower when adopting the method described in step 2 to judge to draw two operation phase of cycle to cycle two binary number, and to be given by the signal transmission of this correct valve position on each adsorption tower corresponding valve with the state of switch valve,
Step 4, repeat step 3 until " 1 " in relocatable binary number is displaced to the end of this relocatable binary number and the state completing respective valves switches, then adsorption tower completes the handoff procedure of four kinds of states, and can carry out the cyclic process of adsorption tower four kinds of states next time according to step 2 ~ step 4;
In described step one, the initial binary number of each valve is determined according to the permutation and combination order of each adsorption tower four kinds of states in operational mode, and four kinds of states refer to absorption, boosting, rinse and inverse put.
2. the multi-tower control method for pressure-swing absorption apparatus according to claim 1, it is characterized in that in described step 2 ~ step 4, when not receiving the valve position feedback signal of respective valves on adsorption tower in official hour, then represent that this valve breaks down, now all valve transfer of this fault tower can make the circulation of deactivating of this fault tower overhaul to manual mode by control system, directly all valve transfer of this adsorption tower are proceeded the cyclic process of step 2 ~ step 4 after trouble shooting to auto state.
3. the multi-tower control method for pressure-swing absorption apparatus according to claim 1, it is characterized in that in described step 2 ~ step 4, when not receiving the valve position feedback signal of respective valves on adsorption tower in official hour, then represent that this valve breaks down, now all valve transfer of this fault tower can make the circulation of deactivating of this fault tower overhaul to manual mode by control system, the circulation of above-mentioned relocatable binary number is first suspended after trouble shooting, then by all valve transfer of this adsorption tower to auto state, the circulation starting above-mentioned relocatable binary number then this adsorption tower can proceed the cyclic process of step 2 ~ step 4.
4. the multi-tower control method for pressure-swing absorption apparatus according to claim 1, when the adsorption tower that it is characterized in that in described step one is in adsorbed state, the INO of adsorption tower, desorb valve is cut out and air outlet valve is controlled; When adsorption tower is in inverse put state, the intake valve of adsorption tower cuts out, desorb valve is controlled and air outlet valve cuts out; When adsorption tower is in flushing state, the intake valve of adsorption tower cuts out, desorb valve is controlled and air outlet valve is controlled; When adsorption tower is in pressure-increasning state, the intake valve of adsorption tower cuts out, desorb valve is cut out and air outlet valve is controlled; In above-mentioned four kinds of states, adopt " ON or 1 " to represent valve open or controlled, " OFF or 0 " represents valve closing.
5. the multi-tower control method for pressure-swing absorption apparatus according to claim 1, is characterized in that the figure place of the initial binary number in described step one is no less than four.
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| CN105182815A (en) * | 2015-08-11 | 2015-12-23 | 小米科技有限责任公司 | Equipment control method and equipment control device |
| CN111545013B (en) * | 2020-05-11 | 2022-03-18 | 杭州和利时自动化有限公司 | Control method and control system of pressure swing adsorption system |
| CN113634088B (en) * | 2020-12-30 | 2024-01-26 | 山东红枫环境能源有限公司 | Tower cutting method |
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| CP02 | Change in the address of a patent holder | ||
| CP02 | Change in the address of a patent holder |
Address after: No. 3 horses horses Science Park Avenue in Qixia District of Nanjing City, Jiangsu province 210049 Patentee after: SINOPEC NANJING ENGINEERING & CONSTRUCTION Inc. Patentee after: Sinopec Engineering (Group) Co.,Ltd. Address before: 211112 No. 1189, Jian Jian Road, Jiangning District, Jiangsu, Nanjing Patentee before: SINOPEC NANJING ENGINEERING & CONSTRUCTION Inc. Patentee before: Sinopec Engineering (Group) Co.,Ltd. |