CN102514844A - Vinyl acetate storage device and alarm and control method for crude vinyl acetate - Google Patents
Vinyl acetate storage device and alarm and control method for crude vinyl acetate Download PDFInfo
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- CN102514844A CN102514844A CN2011104248820A CN201110424882A CN102514844A CN 102514844 A CN102514844 A CN 102514844A CN 2011104248820 A CN2011104248820 A CN 2011104248820A CN 201110424882 A CN201110424882 A CN 201110424882A CN 102514844 A CN102514844 A CN 102514844A
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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, a water spray device and a standby device, wherein the vinyl acetate material feeding valve and the temperature detecting device are arranged on the vinyl acetate storage tank, and the vinyl acetate storage tank is connected with the standby device via the cooler. When the vinyl acetate storage device is used for storing crude vinyl acetate, reasonable alarming temperature is set and effective control measurements are put forward for the crude vinyl acetate stored in the vinyl acetate storage device during operation and stoppage of the vinyl acetate storage device, so that self-polymerization reaction of the crude vinyl acetate is further prevented from being out of control, and the crude vinyl acetate is guaranteed to be safely stored under the static condition and to be safely operated under the dynamic situation.
Description
Technical field
The present invention relates to chemical industry safety method field, relate in particular to a kind of safe in operation of thick vinyl acetate or the warning and the control method of safety storing.
Background technology
Vinyl acetate is one of 50 kinds of chemical of output maximum in the world.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 application more and more widely in fields such as coating, syntheticfibres, leather processing, soil improvements.
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 of preserving under the normal circumstances (VA) can not form poly-mer, but empirical evidence, and polymerization initiator is easy in the system of being introduced into, thereby causes the polymerization reaction of VAM (VA).Just because of this material polymerization taking place easily, for preventing the generation of polymerization accident out of control, should take multiple safety precaution.Polymerization reaction out of control is meant that uncontrollable polymerization reaction takes place 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 take place.Vinyl acetate polymerization reaction out of control is very violent, and the fluctuation of pressure of generation can reach 40 crust (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 takes place in other each big vinyl acetate manufacturer.Therefore, need to thick vinyl acetate generation polymerization sight out of control, the exploitation actv. is reported to the police and control method, eliminates and gathers danger cruelly, prevents the generation of accident, satisfies the needs of actual conditions.
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 thick vinyl acetate; Warning and control method to thick vinyl acetate safe in operation or safety storing; Thereby it is out of control to prevent that thick vinyl acetate self-polymeric reaction from further taking place; Guarantee safe in operation or safety storing, prevent to gather cruelly 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 vinyl acetate material inlet valve on the said vinyl acetate storage tank, be arranged on temperature-detecting device, cooling vessel, discharging pump, emergent bleeder valve, bleeder valve, material feeding pipe, discharging pipeline, spray water system and emergency facility on the said vinyl acetate storage tank; Said material inlet valve is connected with said vinyl acetate storage tank through the material feeding pipe; Said discharging pump one end is connected through the discharging pipeline with said vinyl acetate storage tank; The other end is connected with said emergent bleeder valve through a branch of discharging pipeline; Another branch of discharging pipeline is connected with said bleeder valve, and said emergent bleeder valve is connected with an end of said cooling vessel through the discharging pipeline, and the other end of said cooling vessel is connected with said emergency facility through the discharging pipeline; Said spray water system is used for the vinyl acetate storage tank outer wall shower water to said vinyl acetate memory storage, thereby reduces the temperature of said vinyl acetate storage tank outer wall.
Wherein, said vinyl acetate memory storage also has the polymerization inhibitor feed pump, on said polymerization inhibitor feed pump, also is provided with the polymerization inhibitor inlet valve, and said polymerization inhibitor feed pump is connected through the polymerization inhibitor feeding pipe with said vinyl acetate storage tank.
Wherein, said temperature-detecting device can be temperature sensor or heat indicator.
For solving the problems of the technologies described above, it is a kind of to the thick vinyl acetate safe in operation in the vinyl acetate storage tank that is stored in above-mentioned vinyl acetate memory storage or the warning and the control method of safety storing that the present invention also provides, and it comprises:
The first step confirms that thick vinyl acetate arrives the needed time T MR of maximum response speed under adiabatic condition
Ad=64h;
Second goes on foot, and judges the existence of thick vinyl acetate, sets corresponding alarm temperature according to the different existence of thick vinyl acetate;
The 3rd step; Through the real-time temperature that detects the thick vinyl acetate of storing in the said vinyl acetate storage tank of said temperature-detecting device, when the temperature of temperature-detecting device acquisition reaches said alarm temperature, increase the amount of said spray water system to said vinyl acetate storage tank outer wall shower water; Simultaneously; Open said polymerization inhibitor inlet valve, in said vinyl acetate storage tank, add polymerization inhibitor, thereby the temperature of charge in the said vinyl acetate storage tank is controlled in the safety temperature scope; The further generation of self-polymeric reaction that prevents thick vinyl acetate material is out of control, guarantees safe in operation or safety storing.
Wherein, The existence of judging thick vinyl acetate material in said second step is exactly to judge that the vinyl acetate storage tank that stores thick vinyl acetate is to be in dynamically; The running state of promptly driving still is in static state, promptly stops and material is derived the state in the vinyl acetate storage tank that still rests on.
Wherein, in said second step, be in when dynamic at said thick vinyl acetate material, its alarm temperature is according to the TMR under the different initial temperatures in the operational process
AdConfirm TMR
AdPairing temperature is exactly the alarm temperature of said thick vinyl acetate material during=64h.
Wherein, In said second step; When thick vinyl acetate material was in static state, the minimum control temperature with the thick vinyl acetate in the vinyl acetate storage tank after its alarm temperature stops according to the vinyl acetate memory storage was an initial temperature, the TMR under each temperature spot of autoreaction temperature-rise period heating curve
AdConfirm TMR
AdPairing temperature is exactly the alarm temperature of said thick vinyl acetate material during=64h.
Wherein, in said second step, be in when dynamic TMR at said thick vinyl acetate material
AdPairing alarm temperature is set at 50 ℃～53 ℃ during=64h.
Wherein, in said second step, when said thick vinyl acetate material is in static state, when the initial storing temperature of the thick vinyl acetate material of temperature-detecting device detection of stored in this storage tank on the process vinyl acetate storage tank is 30 ℃, TMR
AdPairing alarm temperature is set at 38.5 ℃～39.5 ℃ during=64h, when initial storing temperature is 40 ℃, and TMR
AdPairing alarm temperature is set at 44 ℃～46 ℃ during=64h.
For solving the problems of the technologies described above, it is a kind of to the thick vinyl acetate safe in operation in the vinyl acetate storage tank that is stored in above-mentioned vinyl acetate memory storage or the warning and the control method of safety storing that the present invention also provides, and it comprises:
The first step confirms that thick vinyl acetate arrives the needed time T MR of maximum response speed under adiabatic condition
Ad=64h;
In second step, judge the existence of thick vinyl acetate, when said thick vinyl acetate material is in when dynamic TMR
AdPairing alarm temperature is set at 51.5 ℃ during=64h; When said thick vinyl acetate material is in static state, when the initial storing temperature of the thick vinyl acetate material of temperature-detecting device detection of stored in this storage tank on the process vinyl acetate storage tank is 30 ℃, TMR
AdPairing alarm temperature is set at 39 ℃ during=64h, when initial storing temperature is 40 ℃, and TMR
AdPairing alarm temperature is set at 45 ℃ during=64h;
In the 3rd step,, detect the temperature of the thick vinyl acetate of storing in the said vinyl acetate storage tank in real time through said temperature-detecting device when said thick vinyl acetate material is in when dynamic; When the temperature that obtains when temperature-detecting device reaches 51.5 ℃ of said alarm temperatures; Increase the amount of said spray water system, simultaneously, open said polymerization inhibitor inlet valve said vinyl acetate storage tank outer wall shower water; In said vinyl acetate storage tank, add polymerization inhibitor; Thereby the temperature of charge in the said vinyl acetate storage tank is controlled in 40 ℃ of the safety temperature scopes, prevents that the further generation of self-polymeric reaction of thick vinyl acetate material is out of control, guarantee safe in operation;
When said thick vinyl acetate material is in static state; It for initial temperature 30 ℃ situation; Detect in real time the temperature of the thick vinyl acetate of storing in the said vinyl acetate storage tank through said temperature-detecting device, when the temperature that obtains when temperature-detecting device reaches 39 ℃ of said alarm temperatures, increase the amount of said spray water system said vinyl acetate storage tank outer wall shower water; Simultaneously; Open said polymerization inhibitor inlet valve, in said vinyl acetate storage tank, add polymerization inhibitor, thereby the temperature of charge in the said vinyl acetate storage tank is controlled in 40 ℃ of the safety temperature scopes; The further generation of self-polymeric reaction that prevents thick vinyl acetate material is out of control, guarantees safety storing;
It for initial temperature 40 ℃ situation; Detect in real time the temperature of the thick vinyl acetate of storing in the said vinyl acetate storage tank through said temperature-detecting device, when the temperature that obtains when temperature-detecting device reaches 45 ℃ of said alarm temperatures, increase the amount of said spray water system said vinyl acetate storage tank outer wall shower water; Simultaneously; Open said polymerization inhibitor inlet valve, in said vinyl acetate storage tank, add polymerization inhibitor, thereby the temperature of charge in the said vinyl acetate storage tank is controlled in 40 ℃ of the safety temperature scopes; The further generation of self-polymeric reaction that prevents thick vinyl acetate material is out of control, guarantees safety storing.
Beneficial effect of the present invention:
The present invention is through providing a kind of vinyl acetate memory storage; And when in this vinyl acetate memory storage, storing thick vinyl acetate; Through at the vinyl acetate memory storage in operation and docking process, rational alarm temperature is set, proposes the actv. measure of control for being stored in wherein thick vinyl acetate, thereby it is out of control to prevent that thick vinyl acetate self-polymeric reaction from further taking place; Guarantee thick vinyl acetate safety storing under quiescent conditions, safe in operation under current intelligence.
Description of drawings
Fig. 1 is the structural representation of vinyl acetate memory storage.
Among Fig. 1,1-vinyl acetate storage tank; 2-material inlet valve; The 3-temperature sensor; 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 jar; 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 vinyl acetate material inlet valve on the said vinyl acetate storage tank, be arranged on temperature-detecting device, cooling vessel, discharging pump, emergent bleeder valve, bleeder valve, material feeding pipe, discharging pipeline and emergency facility on the said vinyl acetate storage tank; Said material inlet valve is connected with said vinyl acetate storage tank through the material feeding pipe; Said discharging pump one end is connected through the discharging pipeline with said vinyl acetate storage tank; The other end is connected with said emergent bleeder valve through a branch of discharging pipeline; Another branch of discharging pipeline is connected with said bleeder valve; Said emergent bleeder valve is connected with an end of said cooling vessel through the discharging pipeline, and the other end of said cooling vessel is connected with said emergency facility through the discharging pipeline.
Said vinyl acetate memory storage also has the polymerization inhibitor feed pump, on said polymerization inhibitor feed pump, also is provided with the polymerization inhibitor inlet valve, and said polymerization inhibitor feed pump is connected through the polymerization inhibitor feeding pipe with said vinyl acetate storage tank.
Said vinyl acetate memory storage also comprises spray water system, and said spray water system is used for the vinyl acetate storage tank outer wall shower water to said vinyl acetate memory storage, thereby reduces the temperature of said vinyl acetate storage tank outer wall.
Said spray water system can comprise spray head and water supply line.
Said temperature-detecting device can be temperature sensor or heat indicator.
Said inlet valve can be the automatic valve structure.
Said emergency facility can be the slack storage jar.
The present invention also provides the thick vinyl acetate safe in operation in the vinyl acetate storage tank that is stored in above-mentioned vinyl acetate memory storage or the warning and the control method of safety storing, and it comprises:
The first step confirms that thick vinyl acetate arrives the needed time T MR of maximum response speed under adiabatic condition
Ad, said TMR
Ad=64h;
Second goes on foot, and judges the existence of thick vinyl acetate, sets corresponding alarm temperature according to the different existence of thick vinyl acetate;
The 3rd step is through the real-time temperature that detects the thick vinyl acetate of storing in the said vinyl acetate storage tank of said temperature-detecting device, when the temperature of temperature-detecting device acquisition reaches said alarm temperature; Increase the amount of said spray water system to said vinyl acetate storage tank outer wall shower water; Simultaneously, open said polymerization inhibitor inlet valve, in said vinyl acetate storage tank, add polymerization inhibitor; Like hydroquinones (HQ), Pyrogentisinic Acid (PBQ); Thereby the temperature of charge in the said vinyl acetate storage tank is controlled in the safety temperature scope, prevents that the further generation of self-polymeric reaction of thick vinyl acetate material is out of control, guarantee safe in operation or safety storing.
The existence of the thick vinyl acetate material in the vinyl acetate storage tank can be divided into two kinds, and a kind of state is that dynamically promptly the vinyl acetate memory storage is in the driving running state; Another kind of state is static, and promptly the vinyl acetate memory storage is in and stops and material is derived the state in the vinyl acetate storage tank that still rests on.
Material mainly is made up of acetic acid and vinyl acetate in the thick vinyl acetate storage tank; Wherein the concentration range of vinyl acetate is 26 (w) %～40 (w) %; We find that thick vinyl acetate autohemagglutination speed not only receives the influence 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; Induction time is meant that vinyl acetate different phase polymerization free radical forms induction time, is that material arrives the time that certain state experiences from initial condition.Therefore, for thick vinyl acetate, two principal elements that influence its autohemagglutination are temperature and induction time.Be in flow regime owing to be in dynamic thick vinyl acetate material; Length of the halt is shorter; Induction time is also shorter, only needs the influence of account temperature to thick vinyl acetate autohemagglutination, is in static thick vinyl acetate material and then need takes all factors into consideration temperature and two factors of induction time.
The thermokinetic analysis of thick vinyl acetate under dynamic and quiescent conditions can be adopted and be shown below:
Wherein, α is a reaction-ure conversion-age, and t is the time, and A is a pre-exponential factor, and E is an energy of activation, f (α) mechanism of reaction function.Response parameter (energy of activation and pre-exponential factor etc.) is not a 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.Conversion ratio methods such as Friedman based on rate of reaction under identical conversion ratio as for relevant this groundwork of temperature, can avoid mechanism of reaction and energy of activation when asking for the reaction different phase, so the result that analogue computing obtains can conform to as far as possible with actual conditions.
Use the method for 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 (α=Const-E α/the RT (Friedman method) of d α/dt)
This moment, E no longer was a constant, but the function of degree of conversion alpha.
Through adopting conversion ratio methods such as Friedman thick 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 response speed required time TMR under the adiabatic condition
Ad, the height of dangerous probability of occurrence is exactly to adopt to arrive maximum response speed required time TMR under this adiabatic condition
AdCharacterize, promptly reaction system is reacted under adiabatic environment, plays the needed time in the maximum response speed moment that reaches constantly from certain.
For the material storage tank that the autoreaction material is housed; Because (working in morning evening Friday to the Monday) attendant of plant area at weekend is less; Patrol frequency to such non-mainstream range device technological condition reduces; Perhaps the operation attention degree descends on the DCS control platform, and all can be provided for the autoreaction of material long induction period, promotes the formation that autohemagglutination is dangerous.Casualty statistics show, and are many because the workman neglects one's supervisory duties or lacks the accident of patrolling and examining all is to take place in this time period, in addition, and the TMR that obtains according to conversion ratio methods such as Friedman
AdData, we find, work as TMR
AdThe danger that thick vinyl acetate takes place to gather cruelly in the＜64h vinyl acetate storage tank is than higher (as shown in table 1); The warning measure need be set in this case and carry out corresponding safety precaution; Thereby the thick vinyl acetate of storing in the control vinyl acetate storage tank gather danger cruelly; Therefore; For the storage tank that the autoreaction material is housed, we select TMRad=64h (from 5 in afternoon Friday to all a whole morning 8 points) as a decision-point of dangerous probability of occurrence, and as the judgment basis of alarm temperature in the first step.
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 thick vinyl acetate material in said second step is exactly to judge that the vinyl acetate storage tank that stores thick vinyl acetate is from the driving running state or is in and stops and material is derived the state in the vinyl acetate storage tank that still rests on.
Said second step further comprises, is in when dynamic at said thick vinyl acetate material, and its alarm temperature promptly adopts and arrives maximum response speed required time TMR under the adiabatic condition according to gathering danger cruelly under the different initial temperatures in the operational process
AdConfirm TMR
AdPairing temperature is exactly the alarm temperature of said thick vinyl acetate material during=64h, and what be in dynamic thick vinyl acetate storage tank alarm temperature is provided for controlling the safe in operation temperature in its operational process; When thick vinyl acetate material is in static state; Minimum control temperature with the thick vinyl acetate in the vinyl acetate storage tank after its alarm temperature stops according to the vinyl acetate memory storage is an initial temperature; Respectively arrive through the autoreaction temperature-rise period and to gather danger cruelly under the temperature, promptly adopt and arrive maximum response speed required time TMR under the adiabatic condition
AdConfirm TMR
AdPairing temperature is exactly the alarm temperature of said thick vinyl acetate material during=64h, is in the safety storing temperature that is provided for controlling storage tank of static thick vinyl acetate storage tank alarm temperature.
In said second step, be in when dynamic TMR at said thick vinyl acetate material
AdPairing alarm temperature is set at 50 ℃～53 ℃ during=64h, further is preferably 51.5 ℃.
In said second step, when said thick vinyl acetate material is in static state, when initial storing temperature is 30 ℃, TMR
AdPairing alarm temperature is set at 38.5 ℃～39.5 ℃ during=64h, further is preferably 39 ℃, when initial storing temperature is 40 ℃, and TMR
AdPairing alarm temperature is set at 44 ℃～46 ℃ during=64h, further is preferably 45 ℃.
In said the 3rd step, thick vinyl acetate material static with dynamically under nominal situation the time safety temperature scope controlled be below 40 ℃.
The present invention is in the operation and docking process of vinyl acetate memory storage; The thick vinyl acetate of being stored faces under the polymerization out-of-control condition, according to thermokinetic analysis, rational alarm temperature is set; Proposing actv. warning and control handles; Thereby it is out of control to prevent that thick vinyl acetate self-polymeric reaction from further taking place, and guarantees thick vinyl acetate safety storing under quiescent conditions, safe in operation under current intelligence.
Below adopt embodiment and accompanying drawing to specify embodiment of the present invention, how the application engineering means solve technical matters to the present invention whereby, and the implementation procedure of reaching technique effect can make much of and enforcement according to this.
Embodiment 1:
Vinyl acetate memory storage of the present invention comprises vinyl acetate storage tank 1, be arranged on vinyl acetate material inlet valve 2 on the said vinyl acetate storage tank, be arranged on temperature sensor 3 on the said vinyl acetate storage tank, cooling vessel 4, discharging pump 5, emergent bleeder valve 6, bleeder valve 7, material feeding pipe, discharging pipeline, spray water system and the slack storage jar 10 be made up of spray head 8 and water supply line 9; Said material inlet valve 2 is connected with said vinyl acetate storage tank 1 through the material feeding pipe; Said discharging pump 5 one ends are connected through the discharging pipeline with said vinyl acetate storage tank 1; The other end is connected with said emergent bleeder valve 6 through a branch of discharging pipeline; Another branch of discharging pipeline is connected with said bleeder valve 7; Said emergent bleeder valve 6 is connected with an end of said cooling vessel 4 through the discharging pipeline; The other end of said cooling vessel 4 is connected with said slack storage jar 10 through the discharging pipeline; Said vinyl acetate memory storage also has polymerization inhibitor feed pump (not shown); On said polymerization inhibitor feed pump, also be provided with polymerization inhibitor inlet valve (not shown), said polymerization inhibitor feed pump is connected through polymerization inhibitor feeding pipe 11 with said vinyl acetate storage tank.
Embodiment 2:
Thick vinyl acetate material is housed in the vinyl acetate storage tank 1 in the vinyl acetate memory storage in embodiment 1; Confirm that this thick vinyl acetate arrives the needed time T MRad=64h of maximum response speed under adiabatic condition; Judge the existence of thick vinyl acetate; Be under the dynamic situation at thick vinyl acetate, its alarm temperature is set at 51.5 ℃.Thick vinyl acetate material temperature in the vinyl acetate storage tank 1 is measured through temperature sensor 3 set on the thick vinyl acetate storage tank 1 in real time; When measuring the thick vinyl acetate material temperature that stores in the tank body when reaching 51.5 ℃ of alarm temperatures; Increase the amount of said spray water system to said vinyl acetate storage tank 1 outer wall shower water; Simultaneously; Open said polymerization inhibitor inlet valve, in said vinyl acetate storage tank 1, add hydroquinone of polymerization retarder, thereby the temperature of charge in the said vinyl acetate storage tank 1 is controlled in 40 ℃ of the safety temperature scopes; The further generation of self-polymeric reaction that prevents thick vinyl acetate material is out of control, guarantees safe in operation.
Embodiment 3:
Thick vinyl acetate material is housed in the vinyl acetate storage tank 1 in the vinyl acetate memory storage in embodiment 1; Confirm that this thick vinyl acetate arrives the needed time T MRad=64h of maximum response speed under adiabatic condition; Judge the existence of thick vinyl acetate; Be under the static situation at thick vinyl acetate, when the initial storing temperature of the thick vinyl acetate material of temperature sensor 3 detection of stored in this storage tank on the process vinyl acetate storage tank 1 was 30 ℃, its alarm temperature was set at 41 ℃.Thick vinyl acetate material temperature in the vinyl acetate storage tank is measured through temperature sensor 3 set on the thick vinyl acetate storage tank 1 in real time; When the temperature that obtains when temperature sensor 3 reaches 39 ℃ of said alarm temperatures; Increase the amount of said spray water system, simultaneously, open said polymerization inhibitor inlet valve said vinyl acetate storage tank 1 outer wall shower water; In said vinyl acetate storage tank 1, add hydroquinone of polymerization retarder; Thereby the temperature of charge in the said vinyl acetate storage tank 1 is controlled in 40 ℃ of the safety temperature scopes, prevents that the further generation of self-polymeric reaction of thick vinyl acetate material is out of control, guarantee safety storing.
Thick vinyl acetate material is housed in the vinyl acetate storage tank 1 in the vinyl acetate memory storage in embodiment 1; Confirm that this thick vinyl acetate arrives the needed time T MRad=64h of maximum response speed under adiabatic condition; Judge the existence of thick vinyl acetate; Be under the static situation at thick vinyl acetate, the initial storing temperature of the thick vinyl acetate material of temperature sensor 3 detection of stored in this storage tank on the process vinyl acetate storage tank 1 is 40 ℃, and its alarm temperature is set at 49 ℃.Thick vinyl acetate material temperature in the vinyl acetate storage tank is measured through temperature sensor 3 set on the thick vinyl acetate storage tank 1 in real time; When the temperature that obtains when temperature sensor 3 reaches 45 ℃ of said alarm temperatures; Increase the amount of said spray water system, simultaneously, open said polymerization inhibitor inlet valve said vinyl acetate storage tank 1 outer wall shower water; In said vinyl acetate storage tank, add hydroquinone of polymerization retarder; Thereby the temperature of charge in the said vinyl acetate storage tank 1 is controlled in 40 ℃ of the safety temperature scopes, prevents that the further generation of self-polymeric reaction of thick vinyl acetate material is out of control, guarantee safety storing.
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 professional and technical personnel of being familiar with possibly utilize the technology contents of above-mentioned announcement to change or be modified as the equivalent embodiment of equivalent variations.But everyly do not break away from technical scheme content of the present invention, to any simple modification, equivalent variations and remodeling that above embodiment did, still belong to the protection domain of technical scheme of the present invention according to technical spirit of the present invention.
Claims (10)
1. vinyl acetate memory storage; It is characterized in that; Comprise: the vinyl acetate storage tank, be arranged on vinyl acetate material inlet valve on the said vinyl acetate storage tank, be arranged on temperature-detecting device, cooling vessel, discharging pump, emergent bleeder valve, bleeder valve, material feeding pipe, discharging pipeline, spray water system and emergency facility on the said vinyl acetate storage tank; Said material inlet valve is connected with said vinyl acetate storage tank through the material feeding pipe; Said discharging pump one end is connected through the discharging pipeline with said vinyl acetate storage tank; The other end is connected with said emergent bleeder valve through a branch of discharging pipeline; Another branch of discharging pipeline is connected with said bleeder valve, and said emergent bleeder valve is connected with an end of said cooling vessel through the discharging pipeline, and the other end of said cooling vessel is connected with said emergency facility through the discharging pipeline; Said spray water system is used for the vinyl acetate storage tank outer wall shower water to said vinyl acetate memory storage, thereby reduces the temperature of said vinyl acetate storage tank outer wall.
2. vinyl acetate memory storage as claimed in claim 1; It is characterized in that; Said vinyl acetate memory storage also has the polymerization inhibitor feed pump; On said polymerization inhibitor feed pump, also be provided with the polymerization inhibitor inlet valve, said polymerization inhibitor feed pump is connected through the polymerization inhibitor feeding pipe with said vinyl acetate storage tank.
3. according to claim 1 or claim 2 vinyl acetate memory storage, it is characterized in that: said temperature-detecting device can be temperature sensor or heat indicator.
4. one kind to the thick vinyl acetate safe in operation in the vinyl acetate storage tank that is stored in each described vinyl acetate memory storage of claim 1 to 3 or the warning and the control method of safety storing, it is characterized in that, comprising:
The first step confirms that thick vinyl acetate arrives the needed time T MR of maximum response speed under adiabatic condition
Ad=64h;
Second goes on foot, and judges the existence of thick vinyl acetate, sets corresponding alarm temperature according to the different existence of thick vinyl acetate;
The 3rd step; Through the real-time temperature that detects the thick vinyl acetate of storing in the said vinyl acetate storage tank of said temperature-detecting device, when the temperature of temperature-detecting device acquisition reaches said alarm temperature, increase the amount of said spray water system to said vinyl acetate storage tank outer wall shower water; Simultaneously; Open said polymerization inhibitor inlet valve, in said vinyl acetate storage tank, add polymerization inhibitor, thereby the temperature of charge in the said vinyl acetate storage tank is controlled in the safety temperature scope; The further generation of self-polymeric reaction that prevents thick vinyl acetate material is out of control, guarantees safe in operation or safety storing.
5. warning as claimed in claim 4 and control method; It is characterized in that: the existence of judging thick vinyl acetate material in said second step is exactly to judge that the vinyl acetate storage tank that stores thick vinyl acetate is to be in dynamically; The running state of promptly driving; Still be in static state, promptly stop and material is derived the state in the vinyl acetate storage tank that still rests on.
6. like the warning and the control method of claim 4 or 5, it is characterized in that: in said second step, be in when dynamic at said thick vinyl acetate material, its alarm temperature is according to the TMR under the different initial temperatures in the operational process
AdConfirm TMR
AdPairing temperature is exactly the alarm temperature of said thick vinyl acetate material during=64h.
7. like described warning of claim 4 to 6 and control method; It is characterized in that: in said second step; When thick vinyl acetate material is in static state; Minimum control temperature with the thick vinyl acetate in the vinyl acetate storage tank after its alarm temperature stops according to the vinyl acetate memory storage is an initial temperature, the TMR under each temperature spot of autoreaction temperature-rise period heating curve
AdConfirm TMR
AdPairing temperature is exactly the alarm temperature of said thick vinyl acetate material during=64h.
8. like described warning of claim 4 to 7 and control method, it is characterized in that: in said second step, be in when dynamic TMR at said thick vinyl acetate material
AdPairing alarm temperature is set at 50 ℃～53 ℃ during=64h, further is preferably 51.5 ℃.
9. like described warning of claim 4 to 8 and control method; It is characterized in that: in said second step; When said thick vinyl acetate material is in static state; When the initial storing temperature of the thick vinyl acetate material of temperature-detecting device detection of stored in this storage tank on the process vinyl acetate storage tank is 30 ℃, TMR
AdPairing alarm temperature is set at 38.5 ℃～39.5 ℃ during=64h, further is preferably 39 ℃, when initial storing temperature is 40 ℃, and TMR
AdPairing alarm temperature is set at 44 ℃～46 ℃ during=64h, further is preferably 45 ℃.
10. one kind to the thick vinyl acetate safe in operation in the vinyl acetate storage tank that is stored in each described vinyl acetate memory storage of claim 1 to 3 or the warning and the control method of safety storing, it is characterized in that, comprising:
The first step confirms that thick vinyl acetate arrives the needed time T MR of maximum response speed under adiabatic condition
Ad=64h;
In second step, judge the existence of thick vinyl acetate, when said thick vinyl acetate material is in when dynamic TMR
AdPairing alarm temperature is set at 51.5 ℃ during=64h; When said thick vinyl acetate material is in static state, when the initial storing temperature of the thick vinyl acetate material of temperature-detecting device detection of stored in this storage tank on the process vinyl acetate storage tank is 30 ℃, TMR
AdPairing alarm temperature is set at 39 ℃ during=64h, when initial storing temperature is 40 ℃, and TMR
AdPairing alarm temperature is set at 45 ℃ during=64h;
In the 3rd step,, detect the temperature of the thick vinyl acetate of storing in the said vinyl acetate storage tank in real time through said temperature-detecting device when said thick vinyl acetate material is in when dynamic; When the temperature that obtains when temperature-detecting device reaches 51.5 ℃ of said alarm temperatures; Increase the amount of said spray water system, simultaneously, open said polymerization inhibitor inlet valve said vinyl acetate storage tank outer wall shower water; In said vinyl acetate storage tank, add polymerization inhibitor; Thereby the temperature of charge in the said vinyl acetate storage tank is controlled in 40 ℃ of the safety temperature scopes, prevents that the further generation of self-polymeric reaction of thick vinyl acetate material is out of control, guarantee safe in operation;
When said thick vinyl acetate material is in static state; It for initial temperature 30 ℃ situation; Detect in real time the temperature of the thick vinyl acetate of storing in the said vinyl acetate storage tank through said temperature-detecting device, when the temperature that obtains when temperature-detecting device reaches 39 ℃ of said alarm temperatures, increase the amount of said spray water system said vinyl acetate storage tank outer wall shower water; Simultaneously; Open said polymerization inhibitor inlet valve, in said vinyl acetate storage tank, add polymerization inhibitor, thereby the temperature of charge in the said vinyl acetate storage tank is controlled in 40 ℃ of the safety temperature scopes; The further generation of self-polymeric reaction that prevents thick vinyl acetate material is out of control, guarantees safety storing;
It for initial temperature 40 ℃ situation; Detect in real time the temperature of the thick vinyl acetate of storing in the said vinyl acetate storage tank through said temperature-detecting device, when the temperature that obtains when temperature-detecting device reaches 45 ℃ of said alarm temperatures, increase the amount of said spray water system said vinyl acetate storage tank outer wall shower water; Simultaneously; Open said polymerization inhibitor inlet valve, in said vinyl acetate storage tank, add polymerization inhibitor, thereby the temperature of charge in the said vinyl acetate storage tank is controlled in 40 ℃ of the safety temperature scopes; The further generation of self-polymeric reaction that prevents thick vinyl acetate material is out of control, guarantees safety storing.
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| CN106243257A (en) * | 2016-07-12 | 2016-12-21 | 中国石油化工股份有限公司 | Vinyl acetate acetic acid mixed liquor polymerization runaway safe control method containing acetaldehyde |
| CN106243257B (en) * | 2016-07-12 | 2019-01-08 | 中国石油化工股份有限公司 | Vinyl acetate containing acetaldehyde-acetic acid mixed liquor polymerize runaway safe control method |
| CN114572577A (en) * | 2022-03-07 | 2022-06-03 | 大连汉诺工程技术有限公司 | Fire prevention and extinguishing process for liquid organic peroxide storage tank |
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