CN102514842B - Emergency treatment method for refined vinyl acetate - Google Patents
Emergency treatment method for refined vinyl acetate Download PDFInfo
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- CN102514842B CN102514842B CN 201110425220 CN201110425220A CN102514842B CN 102514842 B CN102514842 B CN 102514842B CN 201110425220 CN201110425220 CN 201110425220 CN 201110425220 A CN201110425220 A CN 201110425220A CN 102514842 B CN102514842 B CN 102514842B
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Abstract
The invention provides a vinyl acetate storage device, which comprises a vinyl acetate storage tank, a vinyl acetate material feeding valve, a temperature detecting device, a cooler and a standby device, wherein the vinyl acetate material feeding valve and the temperature detecting device are arranged on the vinyl acetate storage tank, the vinyl acetate storage tank is connected with the standby device via the cooler, the feeding valve is of an automatic valve structure, the standby device is a standby storage tank, and the temperature detecting device is a thermometer. When the vinyl acetate storage device is used for storing refined vinyl acetate, reasonable emergency treatment temperature is set and effective emergency treatment measurements are put forward for the refined vinyl acetate stored in the vinyl acetate storage device during operation and stoppage of the vinyl acetate storage device, so that flash polymerization danger of the refined vinyl acetate stored in the vinyl acetate storage tank facing incontrollable polymerization is eliminated, and flash polymerization accidents are prevented.
Description
Technical field
The present invention relates to the Safety technology field, relate in particular to a kind of emergency processing method of smart vinyl acetate.
Background technology
Vinyl acetate is one of 50 kinds of chemical of in the world output maximum.The synthetic macromolecular compound that vinyl acetate polymerization or copolymerization obtain, vinyl acetate can be produced a series of derivants such as polyvinyl acetate, polyvinyl alcohol, acetal resin because of it, has obtained in fields such as coating, syntheticfibres, leather processing, soil improvements using more and more widely.
VAM (VA) is a kind of chemical intermediate of easy polymerization reaction take place, also is one of constituent of many poly-mers and emulsion applications.Laboratory test data shows that the restricted class VAM (VA) of preserving under normal circumstances can not form poly-mer, but empirical evidence, and polymerization initiator is easy to be introduced in the system, thereby causes the polymerization reaction of VAM (VA).Just because of this material polymerization occuring easily, for preventing the generation of polymerization accident out of control, should take multiple safety precaution.Polymerization reaction out of control refers to that uncontrollable polymerization reaction occurs vinyl acetate (VA).Under controlled situation, VAM (VA) can polymerization form vinyl acetate polymer, but when free-radical contents is too high, polymerization reaction out of control will occur.Vinyl acetate polymerization reaction out of control is very violent, and the fluctuation of pressure of generation can reach 40 bar (580psig).And the vinyl acetate storage tank in most vinyl acetate memory storages can't bear these pressure environments, vinylon plant thick vinyl acetate storage tank in Guangxi is exactly to blast because of this reason, cause great production safety responsible accident, the near accident of peracetic acid ethene storage tank polymerization out of control also all occurs in other each large vinyl acetate production producer.
With respect to the thick vinyl acetate of vinyl acetate storage tank stores, the smart acetic acid of storing in most of vinyl acetate storage tank is not because the needs of follow-up polymerization process add polymerization inhibitor generally speaking, and its cruelly poly-danger will be far above thick vinyl acetate.Therefore, need to be for smart vinyl acetate generation polymerization sight out of control, exploitation actv. emergency processing method is eliminated sudden and violent poly-dangerously, and the needs of actual conditions are satisfied in the generation of Accident prevention.
Summary of the invention
Technical matters to be solved by this invention is to be to provide a kind of vinyl acetate memory storage to reach when the material of its storage is smart vinyl acetate, emergency processing method when smart vinyl acetate is faced the polymerization out-of-control condition, thereby sudden and violent poly-dangerous when eliminating smart vinyl acetate and facing polymerization sight out of control prevents from cruelly gathering the generation of accident.
In order to solve the problems of the technologies described above, the invention provides a kind of vinyl acetate memory storage, it comprises: the vinyl acetate storage tank, be arranged on the vinyl acetate material feeding valve on the described vinyl acetate storage tank, be arranged on the temperature-detecting device on the described vinyl acetate storage tank, cooling vessel, discharging pump, emergent bleeder valve, bleeder valve, the material feeding pipeline, discharging pipeline and emergency facility, described material feeding valve is connected with described vinyl acetate storage tank by the material feeding pipeline, described discharging pump one end is connected by the discharging pipeline with described vinyl acetate storage tank, the other end is connected with described emergent bleeder valve by a branch of discharging pipeline, another branch of discharging pipeline is connected with described bleeder valve, described emergent bleeder valve is connected with an end of described cooling vessel by the discharging pipeline, the other end of described cooling vessel is connected with described emergency facility by the discharging pipeline, described inlet valve is the automatic valve structure, described emergency facility is the slack storage tank, and described temperature-detecting device is heat indicator.
Wherein, described vinyl acetate memory storage also has the polymerization inhibitor feed pump, also is provided with the polymerization inhibitor inlet valve on described polymerization inhibitor feed pump, and described polymerization inhibitor feed pump is connected by the polymerization inhibitor feeding pipe with described vinyl acetate storage tank.
For solving the problems of the technologies described above, the present invention also provides a kind of emergency processing method when the smart vinyl acetate in the vinyl acetate storage tank that is stored in above-mentioned vinyl acetate memory storage is faced the polymerization runaway condition, and it comprises:
The first step determines that smart vinyl acetate arrives the needed time T MR of maximum rate of reaction under adiabatic condition
Ad=24h;
Second step is judged the existence of smart vinyl acetate, sets corresponding emergency handling temperature according to the different existence of smart vinyl acetate;
The 3rd step, detect in real time the temperature of the smart vinyl acetate of storing in the described vinyl acetate storage tank by described temperature-detecting device, when the temperature of temperature-detecting device acquisition reaches described emergency handling temperature, close vinyl acetate material feeding valve, cut off charging, open simultaneously described polymerization inhibitor inlet valve, in described vinyl acetate storage tank, add polymerization inhibitor, and will be stored in the described vinyl acetate storage tank smart vinyl acetate material by discharging pump through the cooling vessel dump to emergency facility, thereby the temperature of charge in the described vinyl acetate storage tank is controlled at the safety temperature scope below 25 ℃, prevents the generation of the sudden and violent poly-accident of smart vinyl acetate material.
Wherein, the existence of judging smart vinyl acetate material in the described second step is exactly to judge that the vinyl acetate storage tank that stores smart vinyl acetate is to be in dynamically, the running state of namely driving still is in static state, namely stops and material is not exported the state that still rests in the vinyl acetate storage tank.
Wherein, in the described second step, be in when dynamic at described smart vinyl acetate material, its emergency handling temperature is according to the TMR under the different initial temperatures in the operational process
AdDetermine TMR
AdCorresponding temperature is exactly the emergency handling temperature of described smart vinyl acetate material during=24h.
Wherein, in the described second step, when smart vinyl acetate material was in static state, the minimum control temperature of the smart vinyl acetate after its emergency handling temperature is stopped according to the vinyl acetate memory storage in the vinyl acetate storage tank was as initial temperature, the TMR under each temperature spot of autoreaction temperature-rise period heating curve
AdDetermine TMR
AdCorresponding temperature is exactly the emergency handling temperature of described smart vinyl acetate material during=24h.
Wherein, in the described second step, be in when dynamic TMR at described smart vinyl acetate material
AdCorresponding emergency handling Temperature Setting is 57 ℃～58 ℃ during=24h.
Wherein, in the described second step, when described smart vinyl acetate material is in static state, when the initial storing temperature of the smart vinyl acetate material of temperature-detecting device detection of stored in this storage tank on the process vinyl acetate storage tank is 20 ℃, TMR
AdCorresponding emergency handling Temperature Setting is 43 ℃～44 ℃ during=24h, when initial storing temperature is 25 ℃, and TMR
AdCorresponding emergency handling Temperature Setting is 45 ℃～47 ℃ during=24h.
For solving the problems of the technologies described above, the present invention also provides a kind of emergency processing method when the smart vinyl acetate in the vinyl acetate storage tank that is stored in above-mentioned vinyl acetate memory storage is faced the polymerization runaway condition, and it comprises:
The first step determines that smart vinyl acetate arrives the needed time T MR of maximum rate of reaction under adiabatic condition
Ad=24h;
Second step is judged the existence of smart vinyl acetate, when described smart vinyl acetate material is in when dynamic TMR
AdCorresponding emergency handling Temperature Setting is 57.5 ℃ during=24h; When described smart vinyl acetate material is in static state, when the initial storing temperature of the smart vinyl acetate material of temperature-detecting device detection of stored in this storage tank on the process vinyl acetate storage tank is 20 ℃, TMR
AdCorresponding emergency handling Temperature Setting is 43.5 ℃ during=24h, when initial storing temperature is 25 ℃, and TMR
AdCorresponding emergency handling Temperature Setting is 46 ℃ during=24h;
The 3rd step, when described smart vinyl acetate material is in when dynamic, detect in real time the temperature of the smart vinyl acetate of storing in the described vinyl acetate storage tank by described temperature-detecting device, when the temperature that obtains when temperature-detecting device reaches 57.5 ℃ of described emergency handling temperature, close vinyl acetate material feeding valve, cut off charging, open simultaneously described polymerization inhibitor inlet valve, in described vinyl acetate storage tank, add polymerization inhibitor, and will be stored in the described vinyl acetate storage tank smart vinyl acetate material by discharging pump through the cooling vessel dump to emergency facility, thereby the temperature of charge in the described vinyl acetate storage tank is controlled at below 25 ℃;
When described smart vinyl acetate material is in static state, it is 20 ℃ situation for initial temperature, detect in real time the temperature of the smart vinyl acetate of storing in the described vinyl acetate storage tank by described temperature-detecting device, when the temperature that obtains when temperature-detecting device reaches 43.5 ℃ of described emergency handling temperature, close vinyl acetate material feeding valve, cut off charging, open simultaneously described polymerization inhibitor inlet valve, in described vinyl acetate storage tank, add polymerization inhibitor, and will be stored in the described vinyl acetate storage tank smart vinyl acetate material by discharging pump through the cooling vessel dump to emergency facility, thereby the temperature of charge in the described vinyl acetate storage tank is controlled at below 25 ℃;
It is 25 ℃ situation for initial temperature, detect in real time the temperature of the smart vinyl acetate of storing in the described vinyl acetate storage tank by described temperature-detecting device, when the temperature that obtains when temperature-detecting device reaches 46 ℃ of described emergency handling temperature, close vinyl acetate material feeding valve, cut off charging, open simultaneously described polymerization inhibitor inlet valve, in described vinyl acetate storage tank, add polymerization inhibitor, and will be stored in the described vinyl acetate storage tank smart vinyl acetate material by discharging pump through the cooling vessel dump to emergency facility, thereby the temperature of charge in the described vinyl acetate storage tank is controlled at below 25 ℃.
Beneficial effect of the present invention:
The present invention is by providing a kind of vinyl acetate memory storage, and when in this vinyl acetate memory storage, storing smart vinyl acetate, by the vinyl acetate memory storage the operation and docking process in, for the smart vinyl acetate that is stored in wherein arranges rational emergency handling temperature, proposes actv. emergency handling measure, thereby sudden and violent poly-dangerous when eliminating the smart vinyl acetate be stored in the vinyl acetate storage tank and facing the polymerization out-of-control condition prevents from cruelly gathering the generation of accident.
Description of drawings
Fig. 1 is the structural representation of vinyl acetate memory storage.
Among Fig. 1,1-vinyl acetate storage tank; 2-material feeding valve; The 3-heat indicator; The 4-cooling vessel; The 5-discharging pump; The 6-bleeder valve of meeting an urgent need; The 7-bleeder valve; The 8-spray head; The 9-water supply line; 10-slack storage tank; 11-polymerization inhibitor feeding pipe.
The specific embodiment
The invention provides a kind of vinyl acetate memory storage, it comprises the vinyl acetate storage tank, be arranged on the vinyl acetate material feeding valve on the described vinyl acetate storage tank, be arranged on the temperature-detecting device on the described vinyl acetate storage tank, cooling vessel, discharging pump, emergent bleeder valve, bleeder valve, the material feeding pipeline, discharging pipeline and emergency facility, described material feeding valve is connected with described vinyl acetate storage tank by the material feeding pipeline, described discharging pump one end is connected by the discharging pipeline with described vinyl acetate storage tank, the other end is connected with described emergent bleeder valve by a branch of discharging pipeline, another branch of discharging pipeline is connected with described bleeder valve, described emergent bleeder valve is connected with an end of described cooling vessel by the discharging pipeline, and the other end of described cooling vessel is connected with described emergency facility by the discharging pipeline.
Described vinyl acetate memory storage also has the polymerization inhibitor feed pump, also is provided with the polymerization inhibitor inlet valve on described polymerization inhibitor feed pump, and described polymerization inhibitor feed pump is connected by the polymerization inhibitor feeding pipe with described vinyl acetate storage tank.
Described vinyl acetate memory storage also comprises spray water system, and described spray water system is used for the vinyl acetate storage tank outer wall shower water to described vinyl acetate memory storage, thereby reduces the temperature of described vinyl acetate storage tank outer wall.
Described spray water system can comprise spray head and water supply line.
Described temperature-detecting device can be temperature sensor or heat indicator.
Described inlet valve can be the automatic valve structure.
Described emergency facility can be the slack storage tank.
Emergency processing method when the present invention also provides the smart vinyl acetate in the vinyl acetate storage tank that is stored in above-mentioned vinyl acetate memory storage faced the polymerization runaway condition, it comprises:
The first step determines that smart vinyl acetate arrives the needed time T MR of maximum rate of reaction under adiabatic condition
Ad, described TMR
Ad=24h;
Second step is judged the existence of smart vinyl acetate, sets corresponding emergency handling temperature according to the different existence of smart vinyl acetate;
The 3rd step, detect in real time the temperature of the smart vinyl acetate of storing in the described vinyl acetate storage tank by described temperature-detecting device, when the temperature of temperature-detecting device acquisition reaches described emergency handling temperature, close vinyl acetate material feeding valve, cut off charging, open simultaneously described polymerization inhibitor inlet valve, in described vinyl acetate storage tank, add polymerization inhibitor, such as hydroquinones (HQ), Pyrogentisinic Acid (PBQ), and will be stored in the described vinyl acetate storage tank smart vinyl acetate material by discharging pump through the cooling vessel dump to emergency facility, thereby the temperature of charge in the described vinyl acetate storage tank is controlled in the safety temperature scope, prevents the generation of the sudden and violent poly-accident of smart vinyl acetate material.
The existence of the smart vinyl acetate material in the vinyl acetate storage tank can be divided into two kinds, and a kind of state is that dynamically namely the vinyl acetate memory storage is in the driving running state; Another kind of state is static, and namely the vinyl acetate memory storage is in and stops and material is not exported the state that still rests in the vinyl acetate storage tank.
We find that smart vinyl acetate autohemagglutination speed not only is subjected to the impact of self temperature conditions, and to increase process relevant with forming free radical chain, and that free radical chain increases process is relevant with its induction time.Therefore, for smart vinyl acetate, two principal elements that affect its autohemagglutination are temperature and induction time, and induction time refers to that vinyl acetate different phase polymerization free radical forms induction time, is that material arrives the time that certain state experiences from initial condition.Because being in dynamic smart vinyl acetate material is in flow regime, length of the halt is shorter, induction time is also shorter, only needs to consider temperature to the impact of smart vinyl acetate autohemagglutination, and being in static smart vinyl acetate material then needs to consider temperature and two factors of induction time.
In addition, for the identical smart vinyl acetate material of original composition, it is different reaching the induction time that same temperature experiences from collecting process by the initial storing temperature of difference, although its temperature is identical in this case, but the concentration of inducing free radical that forms is different, thereby its cruelly poly-dangerous difference is very large, and initial temperature is lower, and the danger when reaching same temperature is also just larger.
The thermokinetic analysis of smart vinyl acetate under dynamic and quiescent conditions can be adopted and be shown below:
Wherein, α is reaction-ure conversion-age, and t is the time, and A is pre-exponential factor, and E is energy of activation, f (α) mechanism of reaction function.Response parameter (energy of activation and pre-exponential factor etc.) is not definite value, is in the state of continuous variation, if with the impossible correct simulation reaction process of fixing parameter, so best bet is to avoid asking for the mechanism of reaction function.The Conversion Rate Methods In The Decompositions such as Friedman, can be avoided mechanism of reaction and ask for the energy of activation of reaction during different phase in lower relevant this groundwork with temperature of identical conversion ratio based on rate of reaction, so the result that analogue computing obtains can conform to actual conditions as far as possible.
Use the method for the conversion ratios such as Friedman, the kinetics equation of following formula can be expressed as:
d?ln(dα/dt)α/dT=-Eα/R
Can get through simple transformation:
Ln (d α/dt) α=Const-E α/RT(Friedman method)
This moment, E no longer was constant, but the function of degree of conversion alpha.
By adopting the Conversion Rate Methods In The Decompositions such as Friedman that smart vinyl acetate is carried out thermokinetic analysis in dynamic and static state, obtain thermokinetics data reaction heat, pre-exponential factor, energy of activation, further integration can obtain adopting and arrive maximum rate of reaction required time TMR under the adiabatic condition
Ad, the height of dangerous probability of occurrence is exactly to adopt to arrive maximum rate of reaction required time TMR under this adiabatic condition
AdCharacterize, namely reaction system is reacted under adiabatic environment, constantly plays the maximum needed time in the rate of reaction moment that reaches from certain.
In the described first step, the TMR that obtains according to conversion ratio methods such as Friedman
AdData, we find, work as TMR
AdSudden and violent poly-danger very high (as shown in table 1) occurs in smart vinyl acetate in the＜24h vinyl acetate storage tank, need to take the sudden and violent poly-dangerous of the smart vinyl acetate stored in the emergency handling measure control vinyl acetate storage tank, therefore, select TMR in the described first step
Ad=24h.
The dangerous probability of occurrence criterion of table 1 vinyl acetate storage tank
| Probability | TMR adScope |
| High | TMR ad<24h |
| In | 24h<TMR ad<64h |
| Low | TMR ad>64h |
The existence of judging smart vinyl acetate material in the described second step is exactly to judge that the vinyl acetate storage tank that stores smart vinyl acetate is for the driving running state or is in and stops and material is not exported the state that still rests in the vinyl acetate storage tank.
Described second step further comprises, is in when dynamic at described smart vinyl acetate material, and sudden and violent poly-dangerous according under the different initial temperatures in the operational process of its emergency handling temperature namely adopts and arrive maximum rate of reaction required time TMR under the adiabatic condition
AdDetermine TMR
AdCorresponding temperature is exactly the emergency handling temperature of described smart vinyl acetate material during=24h, and the storage tank in its operational process of identification of being provided for that is in dynamic smart vinyl acetate storage tank emergency handling temperature faces the sight of polymerization when out of control; When smart vinyl acetate material is in static state, the minimum control temperature of the smart vinyl acetate after its emergency handling temperature is stopped according to the vinyl acetate memory storage in the vinyl acetate storage tank is as initial temperature, respectively arrive sudden and violent poly-dangerous under the temperature through the autoreaction temperature-rise period, namely adopt and arrive maximum rate of reaction required time TMR under the adiabatic condition
AdDetermine TMR
AdCorresponding temperature is exactly the emergency handling temperature of described smart vinyl acetate material during=24h, be in static smart vinyl acetate storage tank emergency handling temperature be provided for face the sight of polymerization when out of control in the identification storage tank static store process.
In the described second step, be in when dynamic TMR at described smart vinyl acetate material
AdCorresponding emergency handling Temperature Setting is 57 ℃～58 ℃ during=24h, more preferably 57.5 ℃.
In the described second step, when described smart vinyl acetate material is in static state, when initial storing temperature is 20 ℃, TMR
AdCorresponding emergency handling Temperature Setting is 43 ℃～44 ℃ during=24h, more preferably 43.5 ℃, and when initial storing temperature is 25 ℃, TMR
AdCorresponding emergency handling Temperature Setting is 45 ℃～47 ℃ during=24h, more preferably 46 ℃.
In described the 3rd step, the safety temperature scope of controlling during the nominal situation of smart vinyl acetate material under Static and dynamic is below 25 ℃.
The present invention is in the operation and docking process of vinyl acetate memory storage, the smart vinyl acetate of storing faces under the polymerization out-of-control condition, according to thermokinetic analysis, rational emergency handling temperature is set, proposing the actv. emergency handling handles, face sudden and violent poly-dangerous under the polymerization out-of-control condition to eliminate smart vinyl acetate material, prevent from cruelly gathering the generation of accident.
Below adopt embodiment and accompanying drawing to describe embodiments of the present invention in detail, how the application engineering means solve technical matters to the present invention whereby, and the implementation procedure of reaching technique effect can fully understand and implements according to this.
Embodiment 1:
Vinyl acetate memory storage of the present invention comprises vinyl acetate storage tank 1, be arranged on the vinyl acetate material feeding valve 2 on the described vinyl acetate storage tank, be arranged on the heat indicator 3 on the described vinyl acetate storage tank, cooling vessel 4, discharging pump 5, emergent bleeder valve 6, bleeder valve 7, the material feeding pipeline, the discharging pipeline, the spray water system and the slack storage tank 10 that are formed by spray head 8 and water supply line 9, described material feeding valve 2 is connected with described vinyl acetate storage tank 1 by the material feeding pipeline, described discharging pump 5 one ends are connected by the discharging pipeline with described vinyl acetate storage tank 1, the other end is connected with described emergent bleeder valve 6 by a branch of discharging pipeline, another branch of discharging pipeline is connected with described bleeder valve 7, described emergent bleeder valve 6 is connected with an end of described cooling vessel 4 by the discharging pipeline, the other end of described cooling vessel 4 is connected with described slack storage tank 10 by the discharging pipeline, described vinyl acetate memory storage also has polymerization inhibitor feed pump (not shown), also be provided with polymerization inhibitor inlet valve (not shown) on described polymerization inhibitor feed pump, described polymerization inhibitor feed pump is connected by polymerization inhibitor feeding pipe 11 with described vinyl acetate storage tank.
Embodiment 2:
Smart vinyl acetate material is housed in the vinyl acetate storage tank in the vinyl acetate memory storage in embodiment 1, determine that this essence vinyl acetate arrives the needed time T MRad=24h of maximum rate of reaction under adiabatic condition, judge the existence of smart vinyl acetate, be in the dynamic situation at smart vinyl acetate, its emergency handling Temperature Setting is 57.5 ℃.The temperature of the smart vinyl acetate material in the vinyl acetate storage tank is measured in real time by heat indicator 3 set on the smart vinyl acetate storage tank 1; When measuring the temperature that stores the smart vinyl acetate material in the tank body and reach 57.5 ℃ of emergency handling temperature, close smart vinyl acetate material feeding valve 2, cut off charging, open simultaneously the polymerization inhibitor inlet valve, to a large amount of hydroquinone of polymerization retarder of vinyl acetate storage tank 1 interior adding, and with vinyl acetate storage tank 1 interior smart vinyl acetate material by discharging pump 5 through cooling vessel 4 dumps to slack storage tank 10, final temperature is controlled at below 25 ℃, thereby prevents that smart vinyl acetate material from gathering the generation of accident cruelly.
Embodiment 3:
Smart vinyl acetate material is housed in the vinyl acetate storage tank 1 in the vinyl acetate memory storage in embodiment 1, determine that this essence vinyl acetate arrives the needed time T MRad=24h of maximum rate of reaction under adiabatic condition, judge the existence of smart vinyl acetate, be in the static situation at smart vinyl acetate, when the initial storing temperature of the smart vinyl acetate material of heat indicator 3 detection of stored in this storage tank on the process vinyl acetate storage tank 1 was 20 ℃, its emergency handling Temperature Setting was 43.5 ℃.The temperature of the smart vinyl acetate material in the vinyl acetate storage tank 1 is measured in real time by heat indicator 3 set on the smart vinyl acetate storage tank; When measuring the temperature that stores the smart vinyl acetate material in the tank body and reach 43.5 ℃ of emergency handling temperature, close smart vinyl acetate material feeding valve 2, cut off charging, open simultaneously the inlet valve of polymerization inhibitor, to a large amount of hydroquinone of polymerization retarder of vinyl acetate storage tank 1 interior adding, and with vinyl acetate storage tank 1 interior smart vinyl acetate material by discharging pump 5 through cooling vessel 4 dumps to slack storage tank 10, final temperature is controlled at below 25 ℃, thereby prevents that smart vinyl acetate material from gathering the generation of accident cruelly.
Embodiment 4
Smart vinyl acetate material is housed in the vinyl acetate storage tank 1 in the vinyl acetate memory storage in embodiment 1, determine that this essence vinyl acetate arrives the needed time T MRad=24h of maximum rate of reaction under adiabatic condition, judge the existence of smart vinyl acetate, be in the static situation at smart vinyl acetate, initial storing temperature through the smart vinyl acetate material of heat indicator 3 detection of stored in this storage tank on the vinyl acetate storage tank 1 is 25 ℃, and its emergency handling Temperature Setting is 46 ℃.The temperature of the smart vinyl acetate material in the vinyl acetate storage tank 1 is measured in real time by heat indicator 3 set on the smart vinyl acetate storage tank 1; When measuring the temperature that stores the smart vinyl acetate material in the tank body and reach 46 ℃ of emergency handling temperature, close smart vinyl acetate material feeding valve 2, cut off charging, open simultaneously the polymerization inhibitor inlet valve, to a large amount of hydroquinone of polymerization retarder of vinyl acetate storage tank 1 interior adding, and with smart vinyl acetate material in the vinyl acetate storage tank by discharging pump 5 through cooling vessel 4 dumps to slack storage tank 10, final temperature is controlled at below 25 ℃, thereby prevents the generation of the cruelly poly-accident of smart vinyl acetate material.
This intellectual property of primary enforcement that all are above-mentioned is not set restriction this new product of other forms of enforcement and/or new mode.Those skilled in the art will utilize this important information, and foregoing is revised, to realize similar implementation status.But all modifications or transformation belong to the right of reservation based on new product of the present invention.
The above only is preferred embodiment of the present invention, is not to be the restriction of the present invention being made other form, and any those skilled in the art may utilize the technology contents of above-mentioned announcement to be changed or be modified as the equivalent embodiment of equivalent variations.But every technical solution of the present invention content that do not break away to any simple modification, equivalent variations and remodeling that above embodiment does, still belongs to the protection domain of technical solution of the present invention according to technical spirit of the present invention.
Claims (7)
1. the emergency processing method when the smart vinyl acetate in the vinyl acetate storage tank that is stored in the vinyl acetate memory storage faced the polymerization runaway condition is characterized in that, comprising:
The first step determines that smart vinyl acetate arrives the needed time T MR of maximum rate of reaction under adiabatic condition
Ad=24h;
Second step is judged the existence of smart vinyl acetate, sets corresponding emergency handling temperature according to the different existence of smart vinyl acetate;
The 3rd step, by being arranged on the real-time temperature that detects the smart vinyl acetate of storing in the described vinyl acetate storage tank of temperature-detecting device on the described vinyl acetate storage tank, when the temperature of temperature-detecting device acquisition reaches described emergency handling temperature, close the vinyl acetate material feeding valve on the described vinyl acetate storage tank, cut off charging, open simultaneously the polymerization inhibitor inlet valve on the polymerization inhibitor feed pump on the described vinyl acetate memory storage, in described vinyl acetate storage tank, add polymerization inhibitor, and will be stored in smart vinyl acetate material in the described vinyl acetate storage tank through the cooling vessel dump of vinyl acetate memory storage to the emergency facility of vinyl acetate memory storage, thereby the temperature of charge in the described vinyl acetate storage tank is controlled at the safety temperature scope below 25 ℃, prevents the generation of the sudden and violent poly-accident of smart vinyl acetate material.
2. emergency processing method as claimed in claim 1, it is characterized in that: the existence of judging smart vinyl acetate material in the described second step is exactly to judge that the vinyl acetate storage tank that stores smart vinyl acetate is to be in dynamically, the running state of namely driving, still be in static state, namely stop and material is not exported the state that still rests in the vinyl acetate storage tank.
3. such as the emergency processing method of claim 1 or 2, it is characterized in that: in the described second step, be in when dynamic at described smart vinyl acetate material, its emergency handling temperature is according to the TMR under the different initial temperatures in the operational process
AdDetermine TMR
AdCorresponding temperature is exactly the emergency handling temperature of described smart vinyl acetate material during=24h.
4. emergency processing method as claimed in claim 1 or 2, it is characterized in that: in the described second step, when smart vinyl acetate material is in static state, the minimum control temperature of the smart vinyl acetate after its emergency handling temperature is stopped according to the vinyl acetate memory storage in the vinyl acetate storage tank is as initial temperature, the TMR under each temperature spot of autoreaction temperature-rise period heating curve
AdDetermine TMR
AdCorresponding temperature is exactly the emergency handling temperature of described smart vinyl acetate material during=24h.
5. emergency processing method as claimed in claim 1 or 2 is characterized in that: in the described second step, be in when dynamic TMR at described smart vinyl acetate material
AdCorresponding emergency handling Temperature Setting is 57 ℃～58 ℃ during=24h.
6. emergency processing method as claimed in claim 1 or 2, it is characterized in that: in the described second step, when described smart vinyl acetate material is in static state, when the initial storing temperature of the smart vinyl acetate material of temperature-detecting device detection of stored in this storage tank on the process vinyl acetate storage tank is 20 ℃, TMR
AdCorresponding emergency handling Temperature Setting is 43 ℃～44 ℃ during=24h, when initial storing temperature is 25 ℃, and TMR
AdCorresponding emergency handling Temperature Setting is 45 ℃～47 ℃ during=24h.
7. the emergency processing method when the smart vinyl acetate in the vinyl acetate storage tank that is stored in the vinyl acetate memory storage faced the polymerization runaway condition is characterized in that, comprising:
The first step determines that smart vinyl acetate arrives the needed time T MR of maximum rate of reaction under adiabatic condition
Ad=24h;
Second step is judged the existence of smart vinyl acetate, when described smart vinyl acetate material is in when dynamic TMR
AdCorresponding emergency handling Temperature Setting is 57.5 ℃ during=24h; When described smart vinyl acetate material is in static state, when the initial storing temperature of the smart vinyl acetate material of temperature-detecting device detection of stored in this storage tank on the process vinyl acetate storage tank is 20 ℃, TMR
AdCorresponding emergency handling Temperature Setting is 43.5 ℃ during=24h, when initial storing temperature is 25 ℃, and TMR
AdCorresponding emergency handling Temperature Setting is 46 ℃ during=24h;
The 3rd step, when described smart vinyl acetate material is in when dynamic, by being arranged on the real-time temperature that detects the smart vinyl acetate of storing in the described vinyl acetate storage tank of temperature-detecting device on the described vinyl acetate storage tank, when the temperature that obtains when temperature-detecting device reaches 57.5 ℃ of described emergency handling temperature, close the vinyl acetate material feeding valve on the described vinyl acetate storage tank, cut off charging, open simultaneously the polymerization inhibitor inlet valve on the polymerization inhibitor feed pump on the described vinyl acetate memory storage, in described vinyl acetate storage tank, add polymerization inhibitor, and will be stored in smart vinyl acetate material in the described vinyl acetate storage tank through the cooling vessel dump of vinyl acetate memory storage to the emergency facility of vinyl acetate memory storage, thereby the temperature of charge in the described vinyl acetate storage tank is controlled at below 25 ℃;
When described smart vinyl acetate material is in static state, it is 20 ℃ situation for initial temperature, detect in real time the temperature of the smart vinyl acetate of storing in the described vinyl acetate storage tank by described temperature-detecting device, when the temperature that obtains when temperature-detecting device reaches 43.5 ℃ of described emergency handling temperature, close vinyl acetate material feeding valve, cut off charging, open simultaneously described polymerization inhibitor inlet valve, in described vinyl acetate storage tank, add polymerization inhibitor, and will be stored in smart vinyl acetate material in the described vinyl acetate storage tank through described cooling vessel dump to the described emergency facility, thereby the temperature of charge in the described vinyl acetate storage tank is controlled at below 25 ℃;
It is 25 ℃ situation for initial temperature, detect in real time the temperature of the smart vinyl acetate of storing in the described vinyl acetate storage tank by described temperature-detecting device, when the temperature that obtains when temperature-detecting device reaches 46 ℃ of described emergency handling temperature, close vinyl acetate material feeding valve, cut off charging, open simultaneously described polymerization inhibitor inlet valve, in described vinyl acetate storage tank, add polymerization inhibitor, and will be stored in smart vinyl acetate material in the described vinyl acetate storage tank through described cooling vessel dump to the described emergency facility, thereby the temperature of charge in the described vinyl acetate storage tank is controlled at below 25 ℃.
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| CN106187764B (en) * | 2016-07-12 | 2018-09-14 | 中国石油化工股份有限公司 | The sudden and violent poly- emergence treating method of vinyl acetate and acetic acid mixed liquor |
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