CN105425716A - Intelligent preparation system and method for mesoporous material - Google Patents
Intelligent preparation system and method for mesoporous material Download PDFInfo
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- CN105425716A CN105425716A CN201510948075.7A CN201510948075A CN105425716A CN 105425716 A CN105425716 A CN 105425716A CN 201510948075 A CN201510948075 A CN 201510948075A CN 105425716 A CN105425716 A CN 105425716A
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- 238000002360 preparation method Methods 0.000 title claims abstract description 29
- 239000013335 mesoporous material Substances 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title abstract description 14
- 239000000463 material Substances 0.000 claims abstract description 74
- 238000003756 stirring Methods 0.000 claims abstract description 40
- 238000005303 weighing Methods 0.000 claims abstract description 31
- 238000001514 detection method Methods 0.000 claims abstract description 21
- 238000005406 washing Methods 0.000 claims abstract description 21
- 238000003860 storage Methods 0.000 claims description 229
- 238000006243 chemical reaction Methods 0.000 claims description 62
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 27
- 230000001960 triggered effect Effects 0.000 claims description 24
- 229910052757 nitrogen Inorganic materials 0.000 claims description 19
- 239000000243 solution Substances 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 18
- 230000015572 biosynthetic process Effects 0.000 claims description 13
- 229910001220 stainless steel Inorganic materials 0.000 claims description 13
- 239000010935 stainless steel Substances 0.000 claims description 13
- 238000003786 synthesis reaction Methods 0.000 claims description 13
- 239000008367 deionised water Substances 0.000 claims description 12
- 229910021641 deionized water Inorganic materials 0.000 claims description 12
- 238000010438 heat treatment Methods 0.000 claims description 12
- 230000011664 signaling Effects 0.000 claims description 12
- 238000001914 filtration Methods 0.000 claims description 10
- 239000007864 aqueous solution Substances 0.000 claims description 9
- LZZYPRNAOMGNLH-UHFFFAOYSA-M Cetrimonium bromide Chemical compound [Br-].CCCCCCCCCCCCCCCC[N+](C)(C)C LZZYPRNAOMGNLH-UHFFFAOYSA-M 0.000 claims description 7
- 230000006698 induction Effects 0.000 claims description 7
- 238000009413 insulation Methods 0.000 claims description 6
- 230000006870 function Effects 0.000 abstract description 7
- 238000001035 drying Methods 0.000 abstract description 3
- 238000012806 monitoring device Methods 0.000 abstract description 3
- 238000007599 discharging Methods 0.000 description 8
- 230000005055 memory storage Effects 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 239000011148 porous material Substances 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- 238000006555 catalytic reaction Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000004134 energy conservation Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 238000004438 BET method Methods 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000009903 catalytic hydrogenation reaction Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000007772 electrode material Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012065 filter cake Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 235000011837 pasties Nutrition 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 230000005476 size effect Effects 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
- 238000001179 sorption measurement Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 230000002194 synthesizing effect Effects 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/058—Safety, monitoring
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/16—Plc to applications
- G05B2219/163—Domotique, domestic, home control, automation, smart, intelligent house
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
Abstract
The invention discloses an intelligent preparation system and method for a mesoporous material. The intelligent preparation system comprises a valve control module, an input module, a PLC (Programmable Logic Controller), a weighing module, an alarm module, a stirring module, a pH detection module, a washing module, a drying module and a baking module; the input module inputs the total mass N of materials; the pH detection module detects the pH value of a solution; and the PLC controls the valve control module, the weighing module, the alarm module, the stirring module, the washing module, the drying module and the baking module according to the input value, the pH value and received digital signals to execute relevant operations. The system and the method combine manual control with automatic control, so that the operation is convenient and energy is saved; various parameters such as pH value, material sensing time, material proportion and the like in the system can be strictly controlled, so that the reliability and the safety of the preparation system are greatly improved; and the system further has a monitoring device and has alarm and self-protection functions.
Description
Technical field
The present invention relates to automation field, especially a kind of intelligent preparation system of mesoporous material and method.
Background technology
From the angle of the utilization of resources and environmental protection, utilize the clean resources technology of high-efficiency coal, exploitation " green fuel " has important strategic importance and application prospect.CO catalytic hydrogenation synthesizing low-carbon mixed alcohol (C1-C6 mixed alcohol) is one of important channel of coal resources clean utilization.The application prospect of MAS depends on the exploitation of the catalyzer of excellent performance.
Mesoporous material refers to the polyporous materials of aperture between 2-50nm.Mesoporous material has the features such as high specific surface area, regular pore passage structure, narrow pore diameter distribution, pore size continuously adjustabe, the macromolecular absorption that it has been difficult at a lot of micro-pore zeolite molecular sieve, separation, especially play a role in catalytic reaction.And, the orderly duct of this material can be used as " microreactor ", become " Subjective and Objective material " after assembling has uniform and stable " object " material of nanoscale wherein, the small-size effect, quantum size effect etc. that may have due to the Subjective and Objective effect between its master, object and guest materials will make it to be expected to be widely used in fields such as electrode material, photoelectric device, microelectric technique, chemical sensor, nonlinear optical materials.Therefore mesoporous material is born from its and has attracted the broad interest in the multidisciplinary research fields such as physics, chemistry, biology, material and information in the world at the very start, has become at present in the world across one of multi-disciplinary focus Disciplinary Frontiers.
And the design of the preparation of mesoporous material and automatic control system thereof all plays vital effect to the quality of mesoporous material, if can not strictly control its time, pH value and proportion scale, have a strong impact on the effect that it plays in catalytic reaction.The preparation system efficiency of present mesoporous material is low, and automaticity is low, and mostly depends on manual operation and artificial judgment, when particularly feeding in raw material, needing manually to go reinforced batching.And the safety monitoring assembly of existing most of preparation system is less, function is perfect not, does not possess warning function and self-protection function.
Summary of the invention
Goal of the invention of the present invention is: for above-mentioned Problems existing, a kind of intelligent preparation system and method for mesoporous material are provided, combine Non-follow control and automatically control, eliminate manually-operated trouble, also add manual operation when automatic control realization compares waste resource simultaneously, facilitate operation, the energy-conservation energy; Parameters in the strict control system of energy, as pH value, material induction, time and proportion scale etc., substantially increases reliability and the security of preparation system, also has monitoring device, has warning and self-protection function.
The technical solution used in the present invention is as follows:
An intelligent preparation system for mesoporous material, it comprises: valve control module, load module, PLC, Weighing module, alarm module, stirring module, PH detection module, washing module, irradiation modules and roasting module;
Load module comprises input equipment, for inputting the gross mass N of required material, and is converted into digital signaling zero 01 and is passed to PLC;
PH detection module comprises the PH detector being located at reaction unit two, for the pH value of solution in detection reaction device two, when pH value=8.5, to PLC transmitting digital signals 101;
PLC is connected with roasting module with valve control module, load module, Weighing module, alarm module, stirring module, PH detection module, washing module, irradiation modules respectively, for receiving digital signaling zero 01, transmit executive signal 201 to valve control module, transmit executive signal 301 to Weighing module; Receive digital signal 401, transmit executive signal 202 to valve control module; Receive digital signal 402, transmit executive signal 203 to valve control module; Receive digital signal 403, transmit executive signal 204 to valve control module; Receive digital signal 404, transmit executive signal 205 to valve control module; Receive digital signal 405, transmit executive signal 206 to valve control module; Receive digital signal 406, transmit executive signal 501 to stirring module, and transmit executive signal 207 to valve control module; Receive digital signal 407, transmit executive signal 208 to valve control module; Receive digital signal 101, transmit executive signal 209 to valve control module, transmit executive signal 502 to stirring module; Receive digital signal 408, transmit executive signal 601 to alarm module; Receive digital signal 409, transmit executive signal 602 to alarm module; Receive digital signal 410, transmit executive signal 210 to valve control module; Receive digital signal 411, transmit executive signal 603 to alarm module module; Receive digital signal 412, transmit executive signal 604 to alarm module;
Valve control module comprises solenoid valve one, solenoid valve two, solenoid valve three, solenoid valve four and solenoid valve five; For receiving executive signal 201, open the solenoid valve one in storage box one, storage box two, storage box three, storage box four and storage box five; Receive executive signal 202, close the solenoid valve one in storage box one, close after opening the solenoid valve two, 10min in storage box one; Receive executive signal 203, close the solenoid valve one in storage box two, close after opening the solenoid valve two, 10min in storage box two;
Receive executive signal 204, close the solenoid valve one in storage box three, close after opening the solenoid valve two, 10min in storage box three; Receive executive signal 205, close the solenoid valve one in storage box four, open the solenoid valve two on storage tank four, close after 20 min, complete backward PLC transmitting digital signals 406; Receive executive signal executive signal 206, close the solenoid valve one in storage box five, close after opening the solenoid valve two, 10min on storage tank five; Receive executive signal 207, close after opens solenoid valve three, 30min; Receive executive signal 208, open the solenoid valve two in storage box six; Receive executive signal 209, close the solenoid valve two in storage box six; Receive executive signal 210, close after opening solenoid valve five, 30min;
Weighing module comprises weighing device, for receiving executive signal 301, for weighing the weight of material T in each storage box; In storage box one, as T=18%N, to PLC transmitting digital signals 401; In storage box two, as T=18%N, to PLC transmitting digital signals 402; In storage box three, as T=64%N, to PLC transmitting digital signals 403; In storage box four, as T=66N, to PLC transmitting digital signals 401; In storage box five, when T=predetermined weight 01, to PLC transmitting digital signals 405;
Stir module and comprise stirrer; For receiving executive signal 501, starting stirrer, closing after stirring 20min, completing backward PLC transmitting digital signals 407; Receive executive signal 502, start stirrer, close after 60min, complete backward PLC transmitting digital signals 408;
Alarm module comprises alarm, for receiving executive signal 601, executive signal 602, executive signal 603 and executive signal 604, starting alarm, closing after 2min;
Heating module comprises the well heater being located at stainless steel synthesis reactor, and described well heater is provided with trigger button three, after trigger button three is triggered; start well heater; be adjusted to holding mode after being heated to 120 DEG C, after insulation 90h, close well heater, and to PLC transmitting digital signals 409;
Washing module comprises hydro-extractor, and described hydro-extractor is provided with trigger button four, after trigger button four is triggered, closes hydro-extractor after starting hydro-extractor (being washed by material) 1h, and to PLC transmitting digital signals 410;
Irradiation modules comprises baking oven, and after trigger button one is triggered, (oven temperature being adjusted to 60 DEG C) closes after starting baking oven 30min, completes backward PLC transmitting digital signals 411;
Roasting module comprises calciner, after trigger button two is triggered, starts calciner, closes calciner, complete backward PLC transmitting digital signals 412 after (described calciner is incubated 3h by after heating temperatures to 500 in it DEG C) roasting 3h.
Owing to adopting such scheme, the required material gross mass of input in described input equipment, the quality of each material is distributed according to the ratio of material gross mass and each material, PH detection module accurately have detected the pH value of solution in reaction unit two, valve control module controls the open and close of each solenoid valve admirably, save most of troublesome poeration of staff, and real-time of the present invention is excellent, good stability, Weighing module also can each weight of material of setting of automatic weighing, present invention incorporates manual operation and automatically control, when needs manual operation, pass through alarm, staff is reminded to operate, period staff can do other thing, intelligence degree is high.
Further, it also comprises the infrared induction module being located at storage box one, storage box two, storage box three, storage box four, storage box five and storage box six, described infrared induction module comprises infrared inductor, when material in each storage box be less than ten/for the moment, to PLC transmitting digital signals 10, PLC receives digital signal 10, transmits executive signal 20 to alarm module; Alarm module receives executive signal 20, starts alarm, closes after 2min.
Owing to adopting such scheme, infrared induction module accurately responds to material storage condition, when each material memory space in material storage tank runs low, starts alarm, reminds staff to supplement material in time, has monitoring and warning function.
An intelligent preparation method for the intelligent preparation system of mesoporous material, it comprises the following steps:
Step 1: install each equipment; By Cu (NO3) 23H2O stored in storage box one, Co (NO3) 26H2O stored in storage box two, ZrOCl28H2O stored in storage box three, deionized water stored in storage box four, trimethyl cetyl ammonium bromide stored in storage box five and NaOH aqueous solution stored in storage box six; Open a kind of power supply of intelligent preparation system of mesoporous material;
Step 2: the gross mass N of the required material of input in input equipment, then load module is translated into digital signaling zero 01 and is passed to PLC; PLC receives digital signaling zero 01, transmits executive signal 201 to valve control module, transmits executive signal 301 to Weighing module; Valve control module receives executive signal 201, opens the solenoid valve one in storage box one, storage box two, storage box three, storage box four and storage box five; Receive executive signal 301, Weighing module weighs the weight of material T in each storage box; In storage box one, as T=18%N, to PLC transmitting digital signals 401; In storage box two, as T=18%N, to PLC transmitting digital signals 402; In storage box three, as T=64%N, to PLC transmitting digital signals 403; In storage box four, as T=66N, to PLC transmitting digital signals 401; In storage box five, when T=predetermined weight 01, to PLC transmitting digital signals 405;
Step 3:PLC receives digital signal 401, transmits executive signal 202 to valve control module; Valve control module receives executive signal 202, closes the solenoid valve one in storage box one, closes after opening the solenoid valve two, 10min in storage box one;
Step 4:PLC receives digital signal 402, transmits executive signal 203 to valve control module; Valve control module receives executive signal 203, closes the solenoid valve one in storage box two, closes after opening the solenoid valve two, 10min in storage box two;
Step 5:PLC receives digital signal 403, transmits executive signal 204 to valve control module; Valve control module receives executive signal 204, closes the solenoid valve one in storage box three, closes after opening the solenoid valve two, 10min in storage box three;
Step 6:PLC receives digital signal 404, transmits executive signal 205 to valve control module; Valve control module receives executive signal 205, closes the solenoid valve one in storage box four, opens the solenoid valve two on storage tank four, close after 20 min, complete backward PLC transmitting digital signals 406;
Step 7:PLC receives digital signal 405, transmits executive signal 206 to valve control module; Valve control module receives executive signal executive signal 206, closes the solenoid valve one in storage box five, closes after opening the solenoid valve two, 10min on storage tank five;
Step 8:PLC receives digital signal 406, transmits executive signal 501, and transmit executive signal 207 to valve control module to stirring module; Stir module and receive executive signal 501, start stirrer, close after stirring 20min, complete backward PLC transmitting digital signals 407; Valve control module receives executive signal 207, closes after opens solenoid valve three, 30min; That is, the solution in reaction unit one mixed with the solution in reaction unit two and stir;
Step 9:PLC receives digital signal 407, transmits executive signal 208 to valve control module; Valve control module receives executive signal 208, opens the solenoid valve two in storage box six; That is, NaOH aqueous solution is instilled in reaction unit two, to regulate the pH value of solution; The pH value of solution in PH detection module detection reaction device two, when pH value=8.5, to PLC transmitting digital signals 101; PLC receives digital signal 101, transmits executive signal 209 to valve control module, transmits executive signal 502 to stirring module; Valve control module receives executive signal 209, closes the solenoid valve two in storage box six; Stir module and receive executive signal 502, start stirrer, close after 60min, complete backward PLC transmitting digital signals 408;
Step 10:PLC receives digital signal 408, transmits executive signal 601 to alarm module; Alarm module receives executive signal 601, starts alarm, closes after 2min, reminds staff to be taken out by the floccus be obtained by reacting, and moves in stainless steel synthesis reactor; After the floccus be obtained by reacting is moved to stainless steel synthesis reactor, trigger trigger button three, after trigger button three is triggered; heating module starts its well heater; be adjusted to holding mode after being heated to 120 DEG C, after insulation 90h, close well heater, and to PLC transmitting digital signals 409;
Step 11:PLC receives digital signal 409, transmits executive signal 602 to alarm module; Alarm module receives executive signal 602, starts alarm, closes after 2min; Material is discharged in hydro-extractor by prompting staff, after material is discharged to hydro-extractor, trigger the trigger button four on hydro-extractor, after trigger button four is triggered, then washing module closes hydro-extractor after starting hydro-extractor (being washed by material) 1h, and to PLC transmitting digital signals 410;
Step 12:PLC receives digital signal 410, transmits executive signal 210 to valve control module; Valve control module receives executive signal 210, closes after opening solenoid valve five, 30min; That is, the material in hydro-extractor is put into filtration unit by solenoid valve five to filter; Material after filtering is placed in baking oven, triggers trigger button one, after trigger button one is triggered, (oven temperature being adjusted to 60 DEG C) then irradiation modules closes after starting baking oven 30min, completes backward PLC transmitting digital signals 411; PLC receives digital signal 411, transmits executive signal 603 to alarm module module; Alarm module receives executive signal 603, starts alarm, closes after 2min, and dried material is put into calciner by prompting staff;
Step 13: dried material is put into calciner, trigger trigger button two, after trigger button two is triggered, then roasting module starts calciner, calciner is closed after (described calciner is incubated 3h by after heating temperatures to 500 in it DEG C) roasting 3h, complete backward PLC transmitting digital signals 412, PLC and receive digital signal 412, transmit executive signal 604 to alarm module; Alarm module receives executive signal 604, starts alarm, closes after 2min.
The preparation facilities of the intelligent preparation system of this kind of mesoporous material, it comprises reaction unit and water washing device, described reaction unit is divided into reaction unit one and reaction unit two, described reaction unit is provided with feeding mouth and discharging opening, the discharging opening of described reaction unit one is connected by the feeding mouth of conduit with reaction unit two, and described conduit is provided with solenoid valve three; Described water washing device comprises feeding mouth and discharging opening, and described discharging opening is connected with filtration unit by conduit two, solenoid valve four is established by described conduit two, is provided with material memory storage above described reaction unit, be provided with stirrer in described reaction unit two; Heating arrangement is provided with above described water washing device.
Due to adopt said structure, by Cu (NO3) 23H2O, Co (NO3) 26H2O and ZrOCl28H2O and deionized water miscible in reaction unit one; By trimethyl cetyl ammonium bromide and deionized water in reaction unit two, then open solenoid valve three therebetween, by the solution mixing in reaction unit one and reaction unit two, reaction can be controlled with agreeing with according to the needs of reaction.
Further, described material memory storage comprise storage box one for storing Cu (NO3) 23H2O, for store Co (NO3) 26H2O storage box two, for store ZrOCl28H2O storage box three, for store deionized water storage box four, for storing the storage box five of trimethyl cetyl ammonium bromide and the storage box six for storing NaOH aqueous solution; Described storage box one, storage box two, storage box three, storage box four and storage box five are all provided with dividing plate and are divided into upper strata case and lower floor's case, described upper strata case is for storing material, described lower floor case is equipped with weighing device, and described each dividing plate is all provided with solenoid valve one; Lower floor's case and storage box six bottom of described storage box one, storage box two, storage box three, storage box four and storage box five are equipped with solenoid valve two; Described solenoid valve two is connected to conduit; Conduit on the solenoid valve two of described storage box four is chevron shaped conduit; Two bypass ducts are placed in reaction unit one and reaction unit two respectively; Being placed in reaction unit one bypass ducts diameter is be placed in reaction unit two bypass ducts 1/10th.
Owing to adopting such scheme, in advance by various material storing in the corresponding stored case of material memory storage, with then, by Controlling solenoid valve one, material is fed through the lower floor of storage box from storage box upper strata, is weighed the material of predetermined close by weighing device, eliminate staff and calculate step by step and weigh the trouble that just can be prepared, by Controlling solenoid valve two, the material of predetermined close is directly fed into reaction unit from storage box, facilitates operation, saved the time simultaneously.Deionized water is placed with at storage box four internal memory, the solenoid valve two of its lower floor there is chevron shaped conduit, and being placed in reaction unit one bypass ducts diameter is be placed in reaction unit two bypass ducts 1/10th, when opening solenoid valve two, the deionized water volume flowing into reaction unit one is 1/10th of the deionized water injected in reaction unit two.
Further, also comprise stainless steel synthesis reactor, baking oven, hydro-extractor and calciner, described baking oven is provided with trigger button one, and described calciner is provided with trigger button two; Described hydro-extractor is connected with filtration unit by conduit, and described conduit is provided with solenoid valve five; The conduit of described storage box one, storage box two and storage box three is placed in the feeding mouth place of reaction unit one, and the conduit of described storage box five and storage box six is placed in the feeding mouth place of reaction unit two.
Owing to adopting such scheme, heat in stainless steel synthesis reactor, at baking oven inner drying material, in hydro-extractor, carry out material washing, in calciner, carry out roasting, combine Non-follow control and automatically control, facilitate operation, also save cost.
In sum, owing to have employed technique scheme, the invention has the beneficial effects as follows:
1, present invention incorporates Non-follow control and automatically control, eliminating manually-operated trouble, simultaneously also adding manual operation when automatic control realization compares waste resource, facilitate operation, the energy-conservation energy;
2, the parameters in the strict control system of energy, as pH value, material induction, time and proportion scale etc., substantially increases reliability and the security of preparation system;
3, the present invention also has monitoring device, has warning and self-protection function.
Accompanying drawing explanation
Examples of the present invention will be described by way of reference to the accompanying drawings, wherein:
Fig. 1 is a kind of internal control figure of intelligent control system of mesoporous material.
Embodiment
All features disclosed in this instructions, or the step in disclosed all methods or process, except mutually exclusive feature and/or step, all can combine by any way.
Arbitrary feature disclosed in this instructions (comprising any accessory claim, summary), unless specifically stated otherwise, all can be replaced by other equivalences or the alternative features with similar object.That is, unless specifically stated otherwise, each feature is an example in a series of equivalence or similar characteristics.
A kind of preparation facilities of mesoporous material, it comprises reaction unit and water washing device, described reaction unit is divided into reaction unit one and reaction unit two, described reaction unit is provided with feeding mouth and discharging opening, the discharging opening of described reaction unit one is connected by the feeding mouth of conduit with reaction unit two, and described conduit is provided with solenoid valve three; Described water washing device comprises feeding mouth and discharging opening, and described discharging opening is connected with filtration unit by conduit two, solenoid valve four is established by described conduit two, is provided with material memory storage above described reaction unit, be provided with stirrer in described reaction unit two; Heating arrangement is provided with above described water washing device.
Described material memory storage comprise storage box one for storing Cu (NO3) 23H2O, for store Co (NO3) 26H2O storage box two, for store ZrOCl28H2O storage box three, for store deionized water storage box four, for storing the storage box five of trimethyl cetyl ammonium bromide and the storage box six for storing NaOH aqueous solution; Described storage box one, storage box two, storage box three, storage box four and storage box five are all provided with dividing plate and are divided into upper strata case and lower floor's case, described upper strata case is for storing material, described lower floor case is equipped with weighing device, and described each dividing plate is all provided with solenoid valve one; Lower floor's case and storage box six bottom of described storage box one, storage box two, storage box three, storage box four and storage box five are equipped with solenoid valve two; Described solenoid valve two is connected to conduit; Conduit on the solenoid valve two of described storage box four is chevron shaped conduit; Two bypass ducts are placed in reaction unit one and reaction unit two respectively; Being placed in reaction unit one bypass ducts diameter is be placed in reaction unit two bypass ducts 1/10th.
Also comprise stainless steel synthesis reactor, baking oven, hydro-extractor and calciner, described baking oven is provided with trigger button one, and described calciner is provided with trigger button two; Described hydro-extractor is connected with filtration unit by conduit, and described conduit is provided with solenoid valve five; The conduit of described storage box one, storage box two and storage box three is placed in the feeding mouth place of reaction unit one, and the conduit of described storage box five and storage box six is placed in the feeding mouth place of reaction unit two.
An intelligent preparation system for mesoporous material, it is characterized in that, it comprises: valve control module, load module, PLC, Weighing module, alarm module, stirring module, PH detection module, washing module, irradiation modules and roasting module;
Load module comprises input equipment, for inputting the gross mass N of required material, and is converted into digital signaling zero 01 and is passed to PLC;
PH detection module comprises the PH detector being located at reaction unit two, for the pH value of solution in detection reaction device two, when pH value=8.5, to PLC transmitting digital signals 101;
PLC is connected with roasting module with valve control module, load module, Weighing module, alarm module, stirring module, PH detection module, washing module, irradiation modules respectively, for receiving digital signaling zero 01, transmit executive signal 201 to valve control module, transmit executive signal 301 to Weighing module; Receive digital signal 401, transmit executive signal 202 to valve control module; Receive digital signal 402, transmit executive signal 203 to valve control module; Receive digital signal 403, transmit executive signal 204 to valve control module; Receive digital signal 404, transmit executive signal 205 to valve control module; Receive digital signal 405, transmit executive signal 206 to valve control module; Receive digital signal 406, transmit executive signal 501 to stirring module, and transmit executive signal 207 to valve control module; Receive digital signal 407, transmit executive signal 208 to valve control module; Receive digital signal 101, transmit executive signal 209 to valve control module, transmit executive signal 502 to stirring module; Receive digital signal 408, transmit executive signal 601 to alarm module; Receive digital signal 409, transmit executive signal 602 to alarm module; Receive digital signal 410, transmit executive signal 210 to valve control module; Receive digital signal 411, transmit executive signal 603 to alarm module module; Receive digital signal 412, transmit executive signal 604 to alarm module;
Valve control module comprises solenoid valve one, solenoid valve two, solenoid valve three, solenoid valve four and solenoid valve five; For receiving executive signal 201, open the solenoid valve one in storage box one, storage box two, storage box three, storage box four and storage box five; Receive executive signal 202, close the solenoid valve one in storage box one, close after opening the solenoid valve two, 10min in storage box one; Receive executive signal 203, close the solenoid valve one in storage box two, close after opening the solenoid valve two, 10min in storage box two;
Receive executive signal 204, close the solenoid valve one in storage box three, close after opening the solenoid valve two, 10min in storage box three; Receive executive signal 205, close the solenoid valve one in storage box four, open the solenoid valve two on storage tank four, close after 20 min, complete backward PLC transmitting digital signals 406; Receive executive signal executive signal 206, close the solenoid valve one in storage box five, close after opening the solenoid valve two, 10min on storage tank five; Receive executive signal 207, close after opens solenoid valve three, 30min; Receive executive signal 208, open the solenoid valve two in storage box six; Receive executive signal 209, close the solenoid valve two in storage box six; Receive executive signal 210, close after opening solenoid valve five, 30min;
Weighing module comprises weighing device, for receiving executive signal 301, for weighing the weight of material T in each storage box; In storage box one, as T=18%N, to PLC transmitting digital signals 401; In storage box two, as T=18%N, to PLC transmitting digital signals 402; In storage box three, as T=64%N, to PLC transmitting digital signals 403; In storage box four, as T=66N, to PLC transmitting digital signals 401; In storage box five, when T=predetermined weight 01, to PLC transmitting digital signals 405;
Stir module and comprise stirrer; For receiving executive signal 501, starting stirrer, closing after stirring 20min, completing backward PLC transmitting digital signals 407; Receive executive signal 502, start stirrer, close after 60min, complete backward PLC transmitting digital signals 408;
Alarm module comprises alarm, for receiving executive signal 601, executive signal 602, executive signal 603 and executive signal 604, starting alarm, closing after 2min
Heating module comprises the well heater being located at stainless steel synthesis reactor, and described well heater is provided with trigger button three, after trigger button three is triggered; start well heater; be adjusted to holding mode after being heated to 120 DEG C, after insulation 90h, close well heater, and to PLC transmitting digital signals 409;
Washing module comprises hydro-extractor, and described hydro-extractor is provided with trigger button four, after trigger button four is triggered, closes hydro-extractor after starting hydro-extractor (being washed by material) 1h, and to PLC transmitting digital signals 410;
Irradiation modules comprises baking oven, and after trigger button one is triggered, (oven temperature being adjusted to 60 DEG C) closes after starting baking oven 30min, completes backward PLC transmitting digital signals 411;
Roasting module comprises calciner, after trigger button two is triggered, starts calciner, closes calciner, complete backward PLC transmitting digital signals 412 after (described calciner is incubated 3h by after heating temperatures to 500 in it DEG C) roasting 3h.
It also comprises the infrared induction module being located at storage box one, storage box two, storage box three, storage box four, storage box five and storage box six, when material in each storage box be less than ten/for the moment, to PLC transmitting digital signals 10, PLC receives digital signal 10, transmits executive signal 20 to alarm module; Alarm module receives executive signal 20, starts alarm, closes after 2min.
An intelligent preparation method for the intelligent preparation system of mesoporous material, it comprises the following steps:
Step 1: install each equipment; By Cu (NO3) 23H2O stored in storage box one, Co (NO3) 26H2O stored in storage box two, ZrOCl28H2O stored in storage box three, deionized water stored in storage box four, trimethyl cetyl ammonium bromide stored in storage box five and NaOH aqueous solution stored in storage box six; Open a kind of power supply of intelligent preparation system of mesoporous material;
Step 2: the gross mass N of the required material of input in input equipment, then load module is translated into digital signaling zero 01 and is passed to PLC; PLC receives digital signaling zero 01, transmits executive signal 201 to valve control module, transmits executive signal 301 to Weighing module; Valve control module receives executive signal 201, opens the solenoid valve one in storage box one, storage box two, storage box three, storage box four and storage box five; Receive executive signal 301, Weighing module weighs the weight of material T in each storage box; In storage box one, as T=18%N, to PLC transmitting digital signals 401; In storage box two, as T=18%N, to PLC transmitting digital signals 402; In storage box three, as T=64%N, to PLC transmitting digital signals 403; In storage box four, as T=66N, to PLC transmitting digital signals 401; In storage box five, when T=predetermined weight 01, to PLC transmitting digital signals 405;
Step 3:PLC receives digital signal 401, transmits executive signal 202 to valve control module; Valve control module receives executive signal 202, closes the solenoid valve one in storage box one, closes after opening the solenoid valve two, 10min in storage box one;
Step 4:PLC receives digital signal 402, transmits executive signal 203 to valve control module; Valve control module receives executive signal 203, closes the solenoid valve one in storage box two, closes after opening the solenoid valve two, 10min in storage box two;
Step 5:PLC receives digital signal 403, transmits executive signal 204 to valve control module; Valve control module receives executive signal 204, closes the solenoid valve one in storage box three, closes after opening the solenoid valve two, 10min in storage box three;
Step 6:PLC receives digital signal 404, transmits executive signal 205 to valve control module; Valve control module receives executive signal 205, closes the solenoid valve one in storage box four, opens the solenoid valve two on storage tank four, close after 20 min, complete backward PLC transmitting digital signals 406;
Step 7:PLC receives digital signal 405, transmits executive signal 206 to valve control module; Valve control module receives executive signal executive signal 206, closes the solenoid valve one in storage box five, closes after opening the solenoid valve two, 10min on storage tank five;
Step 8:PLC receives digital signal 406, transmits executive signal 501, and transmit executive signal 207 to valve control module to stirring module; Stir module and receive executive signal 501, start stirrer, close after stirring 20min, complete backward PLC transmitting digital signals 407; Valve control module receives executive signal 207, closes after opens solenoid valve three, 30min; That is, the solution in reaction unit one mixed with the solution in reaction unit two and stir;
Step 9:PLC receives digital signal 407, transmits executive signal 208 to valve control module; Valve control module receives executive signal 208, opens the solenoid valve two in storage box six; That is, NaOH aqueous solution is instilled in reaction unit two, to regulate the pH value of solution; The pH value of solution in PH detection module detection reaction device two, when pH value=8.5, to PLC transmitting digital signals 101; PLC receives digital signal 101, transmits executive signal 209 to valve control module, transmits executive signal 502 to stirring module; Valve control module receives executive signal 209, closes the solenoid valve two in storage box six; Stir module and receive executive signal 502, start stirrer, close after 60min, complete backward PLC transmitting digital signals 408;
Step 10:PLC receives digital signal 408, transmits executive signal 601 to alarm module; Alarm module receives executive signal 601, starts alarm, closes after 2min, reminds staff to be taken out by the floccus be obtained by reacting, and moves in stainless steel synthesis reactor; After the floccus be obtained by reacting is moved to stainless steel synthesis reactor, trigger trigger button three, after trigger button three is triggered; heating module starts its well heater; be adjusted to holding mode after being heated to 120 DEG C, after insulation 90h, close well heater, and to PLC transmitting digital signals 409;
Step 11:PLC receives digital signal 409, transmits executive signal 602 to alarm module; Alarm module receives executive signal 602, starts alarm, closes after 2min; Material is discharged in hydro-extractor by prompting staff, after material is discharged to hydro-extractor, trigger the trigger button four on hydro-extractor, after trigger button four is triggered, then washing module closes hydro-extractor after starting hydro-extractor (being washed by material) 1h, and to PLC transmitting digital signals 410;
Step 12:PLC receives digital signal 410, transmits executive signal 210 to valve control module; Valve control module receives executive signal 210, closes after opening solenoid valve five, 30min; That is, the material in hydro-extractor is put into filtration unit by solenoid valve five to filter; Material after filtering is placed in baking oven, triggers trigger button one, after trigger button one is triggered, (oven temperature being adjusted to 60 DEG C) then irradiation modules closes after starting baking oven 30min, completes backward PLC transmitting digital signals 411; PLC receives digital signal 411, transmits executive signal 603 to alarm module module; Alarm module receives executive signal 603, starts alarm, closes after 2min, and dried material is put into calciner by prompting staff;
Step 13: dried material is put into calciner, trigger trigger button two, after trigger button two is triggered, then roasting module starts calciner, calciner is closed after (described calciner is incubated 3h by after heating temperatures to 500 in it DEG C) roasting 3h, complete backward PLC transmitting digital signals 412, PLC and receive digital signal 412, transmit executive signal 604 to alarm module; Alarm module receives executive signal 604, starts alarm, closes after 2min.
The concrete preparation method of this mesoporous material is as follows:
Take Cu (NO3) 23H2O, Co (NO3) 26H2O, ZrOCl28H2O respectively, miscible in deionized water; Taking trimethyl cetyl ammonium bromide is dissolved in deionized water, then with vigorous stirring by two kinds of solution mixing, by NaOH aqueous solution, pH value is adjusted to 8.5, continues stirring 60 minutes.The pasty material of generation to be transferred in stainless steel synthesis reactor and be warmed up to 120 DEG C and continue reactions 90 hours, reaction end is cooled to room temperature, material is drawn off and repeatedly washs with hydro-extractor, filter cake is at room temperature dry, then in tubular furnace under air atmosphere 550 DEG C of roastings 3 hours, obtain a kind of solid matter, measuring its specific surface area with nitrogen adsorption method (BET method) is 320m2/g, XRD method measures it and has meso-hole structure, and the material prepared by explanation is mesoporous material of the present invention.
The present invention is not limited to aforesaid embodiment.The present invention expands to any new feature of disclosing in this manual or any combination newly, and the step of the arbitrary new method disclosed or process or any combination newly.
Claims (3)
1. an intelligent preparation system for mesoporous material, it is characterized in that, it comprises: valve control module, load module, PLC, Weighing module, alarm module, stirring module, PH detection module, washing module, irradiation modules and roasting module;
Load module comprises input equipment, for inputting the gross mass N of required material, and is converted into digital signaling zero 01 and is passed to PLC;
PH detection module comprises the PH detector being located at reaction unit two, for the pH value of solution in detection reaction device two, when pH value=8.5, to PLC transmitting digital signals 101;
PLC is connected with roasting module with valve control module, load module, Weighing module, alarm module, stirring module, PH detection module, washing module, irradiation modules respectively, for receiving digital signaling zero 01, transmit executive signal 201 to valve control module, transmit executive signal 301 to Weighing module; Receive digital signal 401, transmit executive signal 202 to valve control module; Receive digital signal 402, transmit executive signal 203 to valve control module; Receive digital signal 403, transmit executive signal 204 to valve control module; Receive digital signal 404, transmit executive signal 205 to valve control module; Receive digital signal 405, transmit executive signal 206 to valve control module; Receive digital signal 406, transmit executive signal 501 to stirring module, and transmit executive signal 207 to valve control module; Receive digital signal 407, transmit executive signal 208 to valve control module; Receive digital signal 101, transmit executive signal 209 to valve control module, transmit executive signal 502 to stirring module; Receive digital signal 408, transmit executive signal 601 to alarm module; Receive digital signal 409, transmit executive signal 602 to alarm module; Receive digital signal 410, transmit executive signal 210 to valve control module; Receive digital signal 411, transmit executive signal 603 to alarm module module; Receive digital signal 412, transmit executive signal 604 to alarm module;
Valve control module comprises solenoid valve one, solenoid valve two, solenoid valve three, solenoid valve four and solenoid valve five; For receiving executive signal 201, open the solenoid valve one in storage box one, storage box two, storage box three, storage box four and storage box five; Receive executive signal 202, close the solenoid valve one in storage box one, close after opening the solenoid valve two, 10min in storage box one; Receive executive signal 203, close the solenoid valve one in storage box two, close after opening the solenoid valve two, 10min in storage box two;
Receive executive signal 204, close the solenoid valve one in storage box three, close after opening the solenoid valve two, 10min in storage box three; Receive executive signal 205, close the solenoid valve one in storage box four, open the solenoid valve two on storage tank four, close after 20 min, complete backward PLC transmitting digital signals 406; Receive executive signal executive signal 206, close the solenoid valve one in storage box five, close after opening the solenoid valve two, 10min on storage tank five; Receive executive signal 207, close after opens solenoid valve three, 30min; Receive executive signal 208, open the solenoid valve two in storage box six; Receive executive signal 209, close the solenoid valve two in storage box six; Receive executive signal 210, close after opening solenoid valve five, 30min;
Weighing module comprises weighing device, for receiving executive signal 301, for weighing the weight of material T in each storage box; In storage box one, as T=18%N, to PLC transmitting digital signals 401; In storage box two, as T=18%N, to PLC transmitting digital signals 402; In storage box three, as T=64%N, to PLC transmitting digital signals 403; In storage box four, as T=66N, to PLC transmitting digital signals 401; In storage box five, when T=predetermined weight 01, to PLC transmitting digital signals 405;
Stir module and comprise stirrer; For receiving executive signal 501, starting stirrer, closing after stirring 20min, completing backward PLC transmitting digital signals 407; Receive executive signal 502, start stirrer, close after 60min, complete backward PLC transmitting digital signals 408;
Alarm module comprises alarm, for receiving executive signal 601, executive signal 602, executive signal 603 and executive signal 604, starting alarm, closing after 2min;
Heating module comprises the well heater being located at stainless steel synthesis reactor, and described well heater is provided with trigger button three, after trigger button three is triggered; start well heater; be adjusted to holding mode after being heated to 120 DEG C, after insulation 90h, close well heater, and to PLC transmitting digital signals 409;
Washing module comprises hydro-extractor, and described hydro-extractor is provided with trigger button four, after trigger button four is triggered, closes hydro-extractor after starting hydro-extractor 1h, and to PLC transmitting digital signals 410;
Irradiation modules comprises baking oven, after trigger button one is triggered, closes, complete backward PLC transmitting digital signals 411 after starting baking oven 30min;
Roasting module comprises calciner, after trigger button two is triggered, starts calciner, closes calciner, complete backward PLC transmitting digital signals 412 after roasting 3h.
2. the intelligent preparation system of a kind of mesoporous material as claimed in claim 1, it is characterized in that, it also comprises the infrared induction module being located at storage box one, storage box two, storage box three, storage box four, storage box five and storage box six, when material in each storage box be less than ten/for the moment, to PLC transmitting digital signals 10, PLC receives digital signal 10, transmits executive signal 20 to alarm module; Alarm module receives executive signal 20, starts alarm, closes after 2min.
3. the intelligent preparation method of the intelligent preparation system of a kind of mesoporous material as claimed in claim 1 or 2, it is characterized in that, it comprises the following steps:
Step 1: install each equipment; By Cu (NO3) 23H2O stored in storage box one, Co (NO3) 26H2O stored in storage box two, ZrOCl28H2O stored in storage box three, deionized water stored in storage box four, trimethyl cetyl ammonium bromide stored in storage box five and NaOH aqueous solution stored in storage box six; Open a kind of power supply of intelligent preparation system of mesoporous material;
Step 2: the gross mass N of the required material of input in input equipment, then load module is translated into digital signaling zero 01 and is passed to PLC; PLC receives digital signaling zero 01, transmits executive signal 201 to valve control module, transmits executive signal 301 to Weighing module; Valve control module receives executive signal 201, opens the solenoid valve one in storage box one, storage box two, storage box three, storage box four and storage box five; Receive executive signal 301, Weighing module weighs the weight of material T in each storage box; In storage box one, as T=18%N, to PLC transmitting digital signals 401; In storage box two, as T=18%N, to PLC transmitting digital signals 402; In storage box three, as T=64%N, to PLC transmitting digital signals 403; In storage box four, as T=66N, to PLC transmitting digital signals 401; In storage box five, when T=predetermined weight 01, to PLC transmitting digital signals 405;
Step 3:PLC receives digital signal 401, transmits executive signal 202 to valve control module; Valve control module receives executive signal 202, closes the solenoid valve one in storage box one, closes after opening the solenoid valve two, 10min in storage box one;
Step 4:PLC receives digital signal 402, transmits executive signal 203 to valve control module; Valve control module receives executive signal 203, closes the solenoid valve one in storage box two, closes after opening the solenoid valve two, 10min in storage box two;
Step 5:PLC receives digital signal 403, transmits executive signal 204 to valve control module; Valve control module receives executive signal 204, closes the solenoid valve one in storage box three, closes after opening the solenoid valve two, 10min in storage box three;
Step 6:PLC receives digital signal 404, transmits executive signal 205 to valve control module; Valve control module receives executive signal 205, closes the solenoid valve one in storage box four, opens the solenoid valve two on storage tank four, close after 20 min, complete backward PLC transmitting digital signals 406;
Step 7:PLC receives digital signal 405, transmits executive signal 206 to valve control module; Valve control module receives executive signal executive signal 206, closes the solenoid valve one in storage box five, closes after opening the solenoid valve two, 10min on storage tank five;
Step 8:PLC receives digital signal 406, transmits executive signal 501, and transmit executive signal 207 to valve control module to stirring module; Stir module and receive executive signal 501, start stirrer, close after stirring 20min, complete backward PLC transmitting digital signals 407; Valve control module receives executive signal 207, closes after opens solenoid valve three, 30min; That is, the solution in reaction unit one mixed with the solution in reaction unit two and stir;
Step 9:PLC receives digital signal 407, transmits executive signal 208 to valve control module; Valve control module receives executive signal 208, opens the solenoid valve two in storage box six; That is, NaOH aqueous solution is instilled in reaction unit two, to regulate the pH value of solution; The pH value of solution in PH detection module detection reaction device two, when pH value=8.5, to PLC transmitting digital signals 101; PLC receives digital signal 101, transmits executive signal 209 to valve control module, transmits executive signal 502 to stirring module; Valve control module receives executive signal 209, closes the solenoid valve two in storage box six; Stir module and receive executive signal 502, start stirrer, close after 60min, complete backward PLC transmitting digital signals 408;
Step 10:PLC receives digital signal 408, transmits executive signal 601 to alarm module; Alarm module receives executive signal 601, starts alarm, closes after 2min, reminds staff to be taken out by the floccus be obtained by reacting, and moves in stainless steel synthesis reactor; After the floccus be obtained by reacting is moved to stainless steel synthesis reactor, trigger trigger button three, after trigger button three is triggered; heating module starts its well heater; be adjusted to holding mode after being heated to 120 DEG C, after insulation 90h, close well heater, and to PLC transmitting digital signals 409;
Step 11:PLC receives digital signal 409, transmits executive signal 602 to alarm module; Alarm module receives executive signal 602, starts alarm, closes after 2min; Material is discharged in hydro-extractor by prompting staff, after material is discharged to hydro-extractor, triggers the trigger button four on hydro-extractor, and after trigger button four is triggered, then washing module closes hydro-extractor after starting hydro-extractor 1h, and to PLC transmitting digital signals 410;
Step 12:PLC receives digital signal 410, transmits executive signal 210 to valve control module; Valve control module receives executive signal 210, closes after opening solenoid valve five, 30min; That is, the material in hydro-extractor is put into filtration unit by solenoid valve five to filter; Material after filtering is placed in baking oven, triggers trigger button one, after trigger button one is triggered, then irradiation modules is closed after starting baking oven 30min, completes backward PLC transmitting digital signals 411; PLC receives digital signal 411, transmits executive signal 603 to alarm module module; Alarm module receives executive signal 603, starts alarm, closes after 2min, and dried material is put into calciner by prompting staff;
Step 13: dried material is put into calciner, trigger trigger button two, after trigger button two is triggered, then roasting module starts calciner, calciner is closed after roasting 3h, complete backward PLC transmitting digital signals 412, PLC and receive digital signal 412, transmit executive signal 604 to alarm module; Alarm module receives executive signal 604, starts alarm, closes after 2min.
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