CN112068492A - Safety control system and control method for purification unit of anthraquinone method hydrogen peroxide device - Google Patents

Safety control system and control method for purification unit of anthraquinone method hydrogen peroxide device Download PDF

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Publication number
CN112068492A
CN112068492A CN201910499869.8A CN201910499869A CN112068492A CN 112068492 A CN112068492 A CN 112068492A CN 201910499869 A CN201910499869 A CN 201910499869A CN 112068492 A CN112068492 A CN 112068492A
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temperature
interlocking
purification
value
module
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张帆
贾学五
费轶
刘静如
王振刚
徐伟
石宁
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China Petroleum and Chemical Corp
Sinopec Qingdao Safety Engineering Institute
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China Petroleum and Chemical Corp
Sinopec Qingdao Safety Engineering Institute
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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
    • G05B19/418—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM]
    • G05B19/4183—Total factory control, i.e. centrally controlling a plurality of machines, e.g. direct or distributed numerical control [DNC], flexible manufacturing systems [FMS], integrated manufacturing systems [IMS] or computer integrated manufacturing [CIM] characterised by data acquisition, e.g. workpiece identification
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B15/00—Peroxides; Peroxyhydrates; Peroxyacids or salts thereof; Superoxides; Ozonides
    • C01B15/01—Hydrogen peroxide
    • C01B15/013—Separation; Purification; Concentration
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
    • Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]

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  • Automation & Control Theory (AREA)
  • Inorganic Chemistry (AREA)
  • Devices And Processes Conducted In The Presence Of Fluids And Solid Particles (AREA)

Abstract

The invention discloses a safety control system and a control method for a purification unit of an anthraquinone process hydrogen peroxide device, wherein the purification unit comprises a purification tower, and the safety control system comprises: the purification interlocking device, the temperature detection module and the nitrogen module are respectively arranged on the purification tower; setting a temperature interlocking value on the purification interlocking equipment; when the temperature detected by the temperature detection module is higher than the temperature interlocking value, the purification interlocking equipment is started, all feeding materials of the purification tower are cut off, the materials in the purification tower are discharged, and the nitrogen module injects nitrogen into the purification tower. The safety control system solves the problem that the safety of hydrogen peroxide production control in the prior art is not perfect.

Description

Safety control system and control method for purification unit of anthraquinone method hydrogen peroxide device
Technical Field
The invention relates to the technical field of hydrogen peroxide safety production, in particular to a safety control system and a control method for a purification unit of an anthraquinone process hydrogen peroxide device.
Background
Hydrogen peroxide is one of the main basic chemical products in the world, at present, the anthraquinone method hydrogen peroxide production process is the main production method, the technology is mature, but manufacturers at home and abroad still research and improve individual technical links of the process, the improvement mainly aims at the aspects of catalyst and working medium in the hydrogenation process, complete production process optimization and the like, and the purpose of the improvement is mainly to improve the hydrogen peroxide production capacity of unit volume of working solution. However, inherent dangers in the production process always exist, particularly, a large amount of hydrogen peroxide solution exists in a purification unit, if the control is not proper, serious safety accidents are easy to happen, the existing technology specially aiming at the safety control of the process is few, and the system safety control of the production process is incomplete.
Therefore, the invention provides a safety control system and a control method of a purification unit of an anthraquinone method hydrogen peroxide device, which take alarm and interlocking measures in the use process so as to ensure the safety of the purification process.
Disclosure of Invention
Aiming at the technical problems, the invention aims to overcome the problem of incomplete safety of hydrogen peroxide production control in the prior art, and provides a safety control system and a control method of a purification unit of an anthraquinone method hydrogen peroxide device, which adopt alarm and interlocking measures in the use process so as to ensure the safety of the purification process.
In order to achieve the above object, the present invention provides a safety control system for a purification unit of an anthraquinone process hydrogen peroxide solution device, wherein the purification unit comprises a purification tower, and the safety control system comprises: the purification interlocking device, the temperature detection module and the nitrogen module are respectively arranged on the purification tower; wherein, a temperature interlocking value is set on the purification interlocking equipment; when the temperature detected by the temperature detection module is higher than the temperature interlocking value, the purification interlocking equipment is started, all feeding materials of the purification tower are cut off, the materials in the purification tower are discharged, and the nitrogen module injects nitrogen into the purification tower.
Preferably, the safety control system further comprises: the alarm module is used for setting a temperature alarm value on the purification interlocking equipment; when the temperature detected by the temperature detection module is greater than the temperature alarm value and less than the temperature interlocking value, the alarm module starts to alarm.
Preferably, the temperature detection modules are arranged in at least three groups and are arranged on the purification tower at intervals along the vertical direction.
Preferably, when the temperature detected by any group of the temperature detection modules is greater than the temperature interlocking value, the alarm module starts to alarm; when two sets of temperature that detect module detected more than and more than when the temperature interlocking value, alarm module starts to report to the police, just purification interlock equipment starts, cuts off all feeds into of purification tower, discharges the material in the purification tower, just nitrogen gas module injects nitrogen gas into the purification tower.
Preferably, the emergency discharging module at the bottom of the purification tower is further provided with a flushing module for flushing hydrogen peroxide in the emergency discharging module.
The invention also provides a safety control method of the purification unit of the anthraquinone method hydrogen peroxide device, wherein the purification unit comprises a purification tower, and the temperature in the purification tower is detected; and when the detected temperature is higher than the temperature interlocking value, cutting off all feeding materials of the purification tower, discharging the materials in the purification tower, and injecting nitrogen into the purification tower.
Preferably, when the detected temperature in the purification tower is greater than the temperature alarm value and less than the temperature interlock value, an alarm is given.
Preferably, the temperatures at different heights in the purification tower are detected, and at least three groups of temperature detection results are obtained.
Preferably, when the temperature detected by any group of the temperature detection modules is greater than the temperature interlocking value, an alarm is given; and when the temperatures detected by two or more groups of temperature detection modules are greater than the temperature interlocking value, all feeding materials of the purification tower are cut off, the materials in the purification tower are discharged, and the nitrogen module injects nitrogen into the purification tower.
Preferably, the liquid in the purification tower is discharged into an accident pool, and residual hydrogen peroxide in a discharge pipeline is flushed.
According to the technical scheme, when the safety control system of the purification unit of the anthraquinone process hydrogen peroxide device is used, produced hydrogen peroxide is input into the purification tower for purification treatment, in order to prevent the hydrogen peroxide from being decomposed out of control in the purification tower, the temperature detection module is arranged for monitoring the temperature in the purification tower at present and correlating the detected temperature to the purification interlocking equipment, when the system temperature exceeds a temperature interlocking value, the system automatically stops feeding of the purification tower, materials in the purification tower are discharged, and the nitrogen module injects nitrogen into the purification tower to dilute internal gas and damage the explosion environment, so that the safety of the system is improved. The safety control system of the purification unit of the anthraquinone process hydrogen peroxide device provided by the invention solves the problem that the safety of hydrogen peroxide production control in the prior art is not perfect.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural diagram of a safety control system of an anthraquinone process hydrogen peroxide apparatus according to a preferred embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a safety control system of a purification unit of an anthraquinone process hydrogen peroxide device according to a preferred embodiment of the present invention;
FIG. 3 is a flow chart of a safety control method for a purification unit of an anthraquinone process hydrogen peroxide device according to a preferred embodiment of the present invention;
FIG. 4 is a flow chart of a method for safely controlling the hydrogenation reaction of an anthraquinone process hydrogen peroxide solution plant according to a preferred embodiment of the present invention;
FIG. 5 is a flow chart of a method for safely controlling the oxidation reaction of an anthraquinone process hydrogen peroxide unit according to a preferred embodiment of the present invention;
fig. 6 is a flow chart of a method for safely controlling the extraction reaction of the anthraquinone process hydrogen peroxide solution device according to a preferred embodiment of the present invention.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.
In the present invention, unless otherwise specified, the directional words "upper, lower, inner, outer" and the like included in the terms merely represent the orientation of the terms in a conventional use state or are colloquially understood by those skilled in the art, and should not be construed as limiting the terms.
The safety control system according to the present invention is first described in detail below. As shown in fig. 1, the present invention provides a safety control system for a slurry bed anthraquinone process hydrogen peroxide apparatus, wherein the slurry bed anthraquinone process hydrogen peroxide apparatus comprises: a hydrogenation reactor, an oxidation reactor, an extraction tower and a purification tower which are connected in sequence;
in the preparation process of hydrogen peroxide, firstly, hydrogen is introduced into the hydrogenation reactor for hydrogenation reaction, then the prepared hydrogenated liquid and air are respectively introduced into the oxidation reactor for oxidation reaction, the oxidized liquid after the reaction is introduced into the extraction tower for extraction, pure water is also introduced into the extraction tower, the extract liquid is introduced into the purification tower for purification operation after the extraction is finished, and finally, the required hydrogen peroxide is obtained after the output. The process is a flow for preparing hydrogen peroxide by a slurry bed anthraquinone method. The following is a detailed description of the safety control system.
The safety control system comprises one or more of:
the interlocking module and the nitrogen module are arranged on the hydrogenation reactor, and the interlocking module is configured to perform interlocking control on the feeding and discharging of the hydrogenation reactor and the starting of the nitrogen module according to a pressure detection value, a temperature detection value and a gas-phase oxygen content detection value which are acquired from the hydrogenation reactor;
the interlocking module and the nitrogen module are arranged on the oxidation reactor, and the interlocking module is configured to perform interlocking control on the feeding and discharging of the oxidation reactor and the starting of the nitrogen module according to the temperature detection value and the gas-phase oxygen content detection value acquired from the oxidation reactor;
the interlocking module is arranged on the extraction tower and is configured to perform interlocking control on the feeding and the discharging of the extraction tower according to the temperature detection value and the gas-phase oxygen content detection value acquired on the extraction tower;
and the interlocking module is arranged on the purification tower and is configured to perform interlocking control on the feeding and discharging of the purification tower according to the temperature detection value acquired on the purification tower.
According to the technical scheme, when the safety control system of the slurry bed anthraquinone method hydrogen peroxide device is used, the interlocking module arranged on the hydrogenation reactor performs interlocking control on the feeding and discharging of the hydrogenation reactor and the starting of the nitrogen module according to the pressure detection value, the temperature detection value and the gas-phase oxygen content detection value obtained from the hydrogenation reactor; the interlocking module arranged on the oxidation reactor performs interlocking control on the feeding and discharging of the oxidation reactor and the starting of the nitrogen module according to the temperature detection value and the gas-phase oxygen content detection value obtained from the oxidation reactor; the interlocking module arranged on the extraction tower performs interlocking control on the feeding and discharging of the extraction tower according to the temperature detection value and the gas-phase oxygen content detection value obtained on the extraction tower; the interlocking module arranged on the purification tower is arranged on the interlocking module on the purification tower. The independent interlocking module carries out interlocking control and then separately controls according to the interlocking logics in one-to-one correspondence, thereby overcoming the problems that the safety of hydrogen peroxide production control in the prior art is not perfect, the false alarm rate of some control is very high, and the false triggering caused by instrument faults can also occur.
In a preferred embodiment of the present invention, the interlock module provided on the hydrogenation reactor comprises: a first hydrogenation interlock and a second hydrogenation interlock; the gas-liquid separator of the hydrogenation reactor is provided with the gas-phase oxygen content online monitoring module, the nitrogen module and the pressure detection module, and the hydrogenation reactor is also provided with the temperature detection module and the pressure detection module; setting a pressure interlocking value and a temperature interlocking value on the first hydrogenation interlocking equipment; setting a gas phase oxygen content interlocking value on the second hydrogenation interlocking equipment; when the detected pressure is greater than the pressure interlock value and/or the detected temperature is greater than the temperature interlock value, the first hydrogenation interlock device is started to cut off the hydrogen feeding of the hydrogenation reactor; and when the detected gas-phase oxygen content is greater than the gas-phase oxygen content interlocking value, starting the second hydrogenation interlocking equipment, cutting off the hydrogen feeding of the hydrogenation reactor, starting the nitrogen module, and injecting nitrogen into a gas-liquid separator on the hydrogenation reactor.
In the above scheme, after the reaction of the working solution and the hydrogen gas in the hydrogenation reactor is completed, the hydrogenation solution flows out from the bottom of the hydrogenation reactor, the gas-phase material carrying the liquid phase is discharged from the top of the hydrogenation reactor, and is sent to a gas-liquid separator for gas-liquid separation, wherein the oxygen gas and the hydrogen gas remaining in the reaction which may exist are always used as the non-condensable gas. And configuring the gas-phase oxygen content online monitoring module at a top gas-phase outlet of the gas-liquid separator to monitor the gas-phase oxygen content in real time, associating the gas-phase oxygen content online monitoring module with the second hydrogenation interlocking equipment, controlling the second hydrogenation interlocking equipment through the detected gas-phase oxygen content, starting the second hydrogenation interlocking equipment when the gas-phase oxygen content online monitoring module exceeds the gas-phase oxygen content interlocking value, and stopping the introduction of hydrogen in the hydrogenation reactor in preliminary response, and then diluting oxygen and residual hydrogen in the gas-liquid separator by using inert gas to prevent accidents such as explosion. When the detected pressure and temperature exceed the interlocking value, the first hydrogenation interlocking device is started, the response is only to cut off the introduction of hydrogen and working liquid in the hydrogenation reactor, then the staff is informed to overhaul, and the normal production work can be immediately carried out after the overhaul is finished, but when the second hydrogenation interlocking device is started, the normal production work cannot be immediately carried out.
In a preferred embodiment of the present invention, the safety control system further includes: the system comprises a hydrogen buffer tank, a hydrogen flow control valve and a stop valve, wherein external high-pressure hydrogen is decompressed, buffered by the hydrogen buffer tank and then introduced into the hydrogenation reactor, and the hydrogen flow control valve and the stop valve are arranged on an inlet of the hydrogen buffer tank; the hydrogen buffer tank is also provided with a pressure detection module, and the pressure detection module is connected with the first hydrogenation interlocking device; and acquiring a pressure detection value P1 in the gas-liquid separator, acquiring a pressure detection value P2 in the hydrogen buffer tank, performing interlocking control on the larger one of P1 and P2, and starting the first hydrogenation interlocking device to cut off the hydrogen feeding of the hydrogenation reactor when the larger one of P1 and P2 is greater than the pressure interlocking value.
In the preparation process of hydrogen peroxide, high-pressure hydrogen is firstly introduced into the device, but for the sake of safety and ensuring the normal operation of the interlocking equipment, the high-pressure hydrogen needs to be decompressed and buffered. The pressure in the hydrogen buffer tank is also monitored in real time, the two pressure detection modules are used for respectively detecting the inside of the gas-liquid separator and the inside of the hydrogen buffer tank, the detection result is associated with the first hydrogenation interlocking device, and when the hydrogen buffer tank works, the first hydrogenation interlocking device judges the pressure by taking the larger value of the two pressure detection values as a judgment factor, namely, the interlocking response is carried out as long as one pressure value is larger than the pressure interlocking value. This ensures the security of the system. The pressure interlock value in the present invention is set to the lowest design pressure of all the devices involved in hydrogenation, and the pressure alarm value may be set to a value less than the pressure interlock value.
Preferably, the hydrogen flow regulating valve and the stop valve arranged on the hydrogen buffer tank inlet can be electronic valves, namely, the hydrogen buffer tank inlet can be controlled through wireless signals, so that the hydrogen buffer tank can be remotely controlled by workers, and more accuracy and timeliness can be guaranteed at the controlled opportunity.
In a preferred embodiment of the present invention, the temperature detection modules on the hydrogenation reactor are arranged in at least three groups, and are respectively arranged at intervals along a vertical direction; when the temperature value detected by any group of temperature detection modules is greater than the temperature interlocking value and the detected pressure is less than the pressure interlocking value, the alarm module starts to alarm; and when the temperature values detected by the two or more temperature detection modules are greater than the temperature interlocking value, the first hydrogenation interlocking equipment is started, and the hydrogen feeding of the hydrogenation reactor is cut off.
The invention discloses a hydrogenation reactor, which is characterized in that a plurality of groups of temperature detection modules are arranged for detecting the temperature of each part in the hydrogenation reactor, so that the problem of false triggering easily caused by false indication due to uneven heat transfer of a system and interlocking failure is avoided, equipment such as a device instrument also breaks down to cause the unprepared detection result, and the whole production process is influenced. Of course, the number of the temperature detection modules in the invention is not limited to three, and more than three modules are theoretically possible, and are not described again.
For the arranged position, for example, the outer side of the hydrogenation reactor is provided with a group of temperature detection modules at the top, the middle and the bottom along the vertical direction, so that the temperature inside the hydrogenation reactor is comprehensively detected, the accuracy of interlocking control is ensured, and the fault tolerance rate is also improved.
In a preferred embodiment of the present invention, the interlock module provided on the oxidation reactor comprises: an oxidation interlock; the gas-liquid separator at the top of the oxidation reactor is provided with the gas-phase oxygen content on-line monitoring module and the nitrogen module; the temperature detection module is arranged on the oxidation reactor; the oxidation interlocking equipment is provided with a temperature interlocking value and a gas-phase oxygen content interlocking value; when the detected temperature is greater than the temperature interlocking value or the detected gas-phase oxygen content is greater than the gas-phase oxygen content interlocking value, the alarm module starts to alarm; when the detected temperature is greater than the temperature interlocking value and the detected gas-phase oxygen content is greater than the gas-phase oxygen content interlocking value, starting the oxidation interlocking equipment, and stopping all feeding and discharging on the oxidation reactor; and the nitrogen module starts to inject nitrogen into the gas-liquid separator.
In the scheme, in the oxidation reaction part of the hydrogen peroxide production device, hydrogenated liquid enters from the upper part of the oxidation reactor, air enters from the lower part of the oxidation reactor, after the oxidation reaction is finished, gas is discharged from the top of the tower, gas-liquid separation operation is carried out after cooling, and oxygen is remained and exists as non-condensable gas all the time. The system is possible to explode due to the fact that the temperature is too high or the gas-phase oxygen content is too high. The new interlocking logic designed in the invention starts the oxidation interlocking equipment only under the condition that the temperature and the gas-phase oxygen content both exceed the interlocking value, and completely stops the feeding and discharging on the oxidation reactor; and the nitrogen module is started to inject nitrogen into the gas-liquid separator, so that the gas in the gas-liquid separator is diluted, and accidents such as explosion are prevented. Once the oxidation interlocking equipment is started, the whole production needs to be stopped, and after nitrogen is injected, the produced raw materials and products need to be replaced again, so the start of the oxidation interlocking equipment also needs to be careful, so the invention controls the oxidation interlocking equipment by interlocking the temperature and the gas-phase oxygen content together, can effectively improve the fault tolerance rate, and can treat small faults in a mode of worker maintenance, thereby ensuring the production efficiency.
In a preferred embodiment of the present invention, the temperature detection modules on the oxidation reactor are arranged in at least three groups, and are respectively arranged at intervals along a vertical direction; when the temperature detected by any group of temperature detection modules is greater than the temperature interlocking value and the gas-phase oxygen content detection value is less than the gas-phase oxygen content interlocking value, an alarm module is started to alarm; when the temperatures detected by two or more groups of temperature detection modules are greater than the temperature interlocking value, the oxidation interlocking equipment is started, and the feeding of air and hydrogenation liquid on the oxidation reactor is cut off; when the temperature detected by any group of temperature detection modules is greater than the temperature interlocking value and the gas-phase oxygen content detection value is greater than the gas-phase oxygen content interlocking value, the oxidation interlocking equipment is started, the feeding of air and hydrogenated liquid on the oxidation reactor is cut off, and the nitrogen module is used for filling nitrogen into the gas-liquid separator.
In the scheme, three groups of temperature detection modules are arranged to detect the temperatures at different heights in the oxidation reactor, so that the detection accuracy is improved, the problems of temperature unevenness and even instrument faults can occur in the production process, the problems can cause the interlocking faults in a common interlocking system, and the system can avoid the problems of false indication caused by uneven heat transfer of the system and the interlocking faults caused by the instrument faults.
According to the invention, a plurality of temperature detection modules are arranged and distributed at different height positions on the hydrogenation reactor for temperature detection, and interlocking logic is reset: only one temperature detection value reaches the interlocking value, the oxidation interlocking device does not respond, only alarms to inform workers to overhaul, the interlocking false alarm rate is greatly reduced, and false triggering caused by instrument faults is prevented. Of course, the number of the temperature detection modules in the invention is not limited to three, and more than three modules are theoretically possible, and are not described again.
In a preferred embodiment of the invention, a gas phase oxygen content maximum is also provided in the oxidation interlock; when the detected gas-phase oxygen content is greater than the gas-phase oxygen content extreme value, the oxidation interlocking equipment is started, and the feeding and the discharging on the oxidation reactor are all stopped; and the nitrogen module starts to inject nitrogen into the gas-liquid separator.
In the scheme, a gas-phase oxygen content extreme value is also set, and interlocking logic is enriched, namely when the gas-phase oxygen content reaches the extreme value, the oxidation interlocking equipment can be started without the temperature reaching an interlocking value, and when the gas-phase oxygen content is too high, explosion danger can be generated, so that the interlocking logic is provided to further improve the safety of the system.
Preferably, the gas-phase oxygen content extremum is: the oxygen molar concentration reaches 16 percent. Of course, this is possible for extremes in the range of 15% to 17%, and the protection of the gas phase oxygen content extremes is not limited to 16% limits in the present invention.
In a preferred embodiment of the present invention, the interlocking module provided on the extraction column includes: a first extraction interlocking device and a second extraction interlocking device; the top of the extraction tower is provided with the gas-phase oxygen content online monitoring module, the nitrogen module and the emergency cooling water tank; the extraction tower is provided with the temperature detection module; setting a gas-phase oxygen content interlocking value in the second extraction interlocking equipment; setting a temperature interlocking value in the first extraction interlocking equipment; when the detected gas-phase oxygen content is larger than the gas-phase oxygen content interlocking value, the second extraction interlocking equipment is started, the feeding of the oxidizing liquid of the extraction tower is cut off, pure water is kept to be continuously fed in, and the nitrogen module injects nitrogen into the extraction tower; when the detected temperature is higher than the temperature interlocking value, the first extraction interlocking equipment is started, all feeding and discharging of the extraction tower are cut off, and the interior of the extraction tower is flushed; and the materials in the extraction tower are completely discharged.
In the scheme, the extraction tower is used for extracting the produced hydrogen peroxide, and a large amount of hydrogen peroxide is arranged at the bottom of the extraction tower so as to prevent the hydrogen peroxide from being decomposed out of control, so that accidents such as explosion and the like occur. The invention is provided with a temperature detection module and a gas-phase oxygen content online monitoring module, and two sets of interlocking equipment are used for separately carrying out interlocking control, namely the first extraction interlocking equipment responds to the detection of the temperature, the second extraction interlocking equipment responds to the detection of the gas-phase oxygen content, and a new interlocking logic is also set. When the decomposition severity of hydrogen peroxide is low, the oxygen content of the top gas phase is increased to reach an interlocking value, the second extraction interlocking equipment is started, the oxidation liquid is stopped from entering, pure water is kept to be continuously introduced into the extraction tower, and nitrogen is introduced to dilute the gas inside; when the decomposition of hydrogen peroxide is serious, the temperature rises rapidly to reach a temperature interlocking value, the first extraction interlocking equipment is started, the extraction work is stopped completely, emergency cooling water is introduced, and simultaneously the materials are discharged. Thereby ensuring the safety of the system.
In the production, once the extraction tower interlock is started, huge material loss is caused, but in the invention, the material is not discharged when the oxygen content interlock is started, and the material is discharged only when the temperature is detected to exceed the interlock, because the hydrogen peroxide is seriously decomposed at this time, the discharging operation is required to control the danger.
In a preferred embodiment of the present invention, the safety control system further includes: the high-level emergency water tank is arranged at the top of the extraction tower, and when the first extraction interlocking equipment is started, water is poured into the extraction tower by the high-level emergency water tank.
In the above scheme, the high-level emergency water tank is used for performing irrigation treatment on the interior of the extraction tower, so as to flush the extraction tower, flush all materials in the extraction tower and eliminate danger, and the high-level emergency water tank is arranged at the top of the extraction tower in order to improve the flushing effect.
In a preferred embodiment of the present invention, the high emergency water tank contains pure water containing phosphoric acid, and the pure water is flushed with the pure water, so that the risk of further decomposition of hydrogen peroxide is prevented.
In a preferred embodiment of the invention, an emergency discharging module is arranged at the bottom of the extraction tower and is connected with an accident pool; the safety control system further includes: and the flushing module is communicated with the emergency discharging module and is used for flushing hydrogen peroxide in the emergency discharging module.
In the scheme, the emergency discharging module is used for discharging all materials in the extraction tower, but a large amount of hydrogen peroxide is attached to the interior of the emergency discharging module in the discharging process, so that potential safety hazards still exist.
In a preferred embodiment of the present invention, at least two sets of the temperature detection modules are disposed on the extraction tower, and are disposed at the bottom and the upper part of the extraction tower respectively; each group of temperature detection modules is provided with a temperature remote transmission module; when the temperature detected by any group of temperature detection modules is greater than the temperature interlocking value, an alarm module is started to alarm; when the temperatures detected by the two or more temperature detection modules are greater than the temperature interlocking value, the first extraction interlocking equipment is started, all feeding and discharging of the extraction tower are cut off, the interior of the extraction tower is washed, and all materials in the extraction tower are discharged.
In the scheme, two groups of temperature detection modules are arranged to detect the temperatures at different heights in the extraction tower, so that the detection accuracy is improved, the problems of uneven temperature and even instrument faults can occur in the production process, the problems can cause interlocking faults in a common interlocking system, and the system can avoid the problems of false indication and instrument faults caused by uneven heat transfer of the system.
According to the invention, a plurality of temperature detection modules are arranged and distributed at different height positions on the extraction tower to detect the temperature of the extraction tower, and interlocking logic is reset: only one temperature detection value reaches the interlocking value, the interlocking device does not respond, only alarms to inform workers to overhaul, the interlocking false alarm rate is greatly reduced, and false triggering caused by instrument faults is prevented. Of course, the number of the temperature detection modules in the invention is not limited to two, and more than two modules are theoretically possible, and are not described again.
In a preferred embodiment of the present invention, as shown in fig. 2, the interlocking module provided on the purification tower includes: purging the interlock device; the nitrogen module and the temperature detection module are arranged on the purification tower; setting a temperature interlocking value on the purification interlocking equipment; when the detected temperature is higher than the temperature interlocking value, the purification interlocking equipment is started, all feeding materials of the purification tower are cut off, the materials in the purification tower are discharged, and the nitrogen module injects nitrogen into the purification tower.
In the above scheme, hydrogen peroxide solution with production is input to carry out purification treatment in the purifying tower, for preventing that hydrogen peroxide solution from taking place out of control and decomposing in the purifying tower, it is right to have set up temperature detection module the temperature in the purifying tower is monitored now to temperature that will detect is related to purify interlock, when the system temperature surpassed temperature interlock value, the system automatic stop the feeding of purifying tower is discharged material in the purifying tower, just nitrogen gas module injects nitrogen gas into the purifying tower and dilutes inside gas, destroys the environment of explosion to improve the security of system.
In a preferred embodiment of the present invention, the temperature detection modules of the purification tower are arranged in at least three groups and are arranged on the purification tower at intervals along a vertical direction; when the temperature detected by any group of temperature detection modules is greater than the temperature interlocking value, an alarm module is started to alarm; when the temperature detected by the two or more temperature detection modules is greater than the temperature interlocking value, the purification interlocking equipment is started, all feeding materials of the purification tower are cut off, the materials in the purification tower are discharged, and the nitrogen module injects nitrogen into the purification tower.
In the scheme, at least three groups of temperature detection modules are arranged on the purification tower, so that the detection accuracy is effectively improved, and the problems of temperature unevenness and even instrument faults can occur in the production process, and the problems can cause interlocking faults in a common interlocking system.
In the present invention, the positions of the plurality of temperature detection modules are generally set at different heights on the purification tower, for example, at three positions of the top, middle and bottom of the purification tower, so as to detect the temperatures at different positions in the purification tower and obtain the accurate temperature in the purification tower in all directions, and the present invention also resets the interlock logic: only one temperature detection value reaches the interlocking value, the purification interlocking device does not respond, only alarms to inform workers to overhaul, the interlocking false alarm rate is greatly reduced, and false triggering caused by instrument faults is prevented. Of course, the number of the temperature detection modules in the invention is not limited to three, and more than three modules are theoretically possible, and are not described again.
In a preferred embodiment of the invention, an emergency discharging module is arranged at the bottom of the purification tower and is connected with the accident pool; the safety control system further includes: and the flushing module is communicated with the emergency discharging module and is used for flushing hydrogen peroxide in the emergency discharging module.
In the scheme, the emergency discharging module is used for discharging all materials in the purification tower, but a large amount of hydrogen peroxide is attached to the interior of the emergency discharging module in the discharging process, so that potential safety hazards still exist.
In a preferred embodiment of the invention, the liquid used in the flushing module needs to be non-reactive with the hydrogen peroxide and the remaining liquid does not affect the normal subsequent purification, and the flushing module contains desalinated water, which is first of all readily available and the flushing capacity is guaranteed.
In a preferred embodiment of the present invention, the safety control system further includes an alarm module, and the alarm modules are respectively disposed on the hydrogenation reactor, the oxidation reactor, the extraction tower, and the purification tower;
the interlocking module is provided with a pressure alarm value, a temperature alarm value and a gas phase oxygen content alarm value,
and when the temperature detection values obtained from the hydrogenation reactor, the oxidation reactor, the extraction tower and the purification tower are greater than the temperature alarm value, and/or the pressure detection value is greater than the pressure alarm value, and/or the gas-phase oxygen content detection value is greater than the gas-phase oxygen content alarm value, the alarm module starts to alarm.
In the scheme, the alarm module and the alarm value are added, so that the safety of the system is undoubtedly and effectively improved, because if only the interlocking value is set, the interlocking device is directly started to respond when the interlocking value is reached in work, the time that a worker possibly does not react is short, the alarm function is added into the system, the corresponding alarm values are respectively set in the interlocking device, the set alarm value is smaller than the interlocking value, and only the alarm response is sent out when the detected pressure, temperature or gas-phase oxygen content is between the alarm value and the interlocking value, so that the worker is informed to timely overhaul to avoid more serious accidents or influence the generation efficiency of the whole device.
For the range of interlock values and alarm values, the following is detailed:
for the hydrogenation reactor, in the present invention, an optimized scheme is obtained for the alarm value and the interlock value according to the production experiment, wherein the alarm value for the temperature is optimally 65 ℃, the temperature interlock value is optimally 70 ℃, and the gas phase oxygen content alarm value is: the molar concentration of the oxygen reaches 1.5 percent, and the gas-phase oxygen content interlocking value is as follows: the molar concentration of oxygen reached 2.5%. Of course, the scope of protection in the present invention is not limited to only the point value, and a range around the point value is the scope of protection in the present invention, and for example, in the case of the gas phase oxygen content alarm value, it may be any value in the range of 1.4% to 1.6%, whereas the scope of protection in the present invention for the gas phase oxygen content alarm value is 1.4% to 1.6%.
For the oxidation generator: in the invention, an optimization scheme about alarm values and interlocking values is obtained according to production experiments, wherein the temperature alarm value is optimally 55 ℃, the temperature interlocking value is optimally 60 ℃, and the gas-phase oxygen content alarm value is: the molar concentration of the oxygen reaches 8 percent, and the gas-phase oxygen content interlocking value is as follows: the molar concentration of oxygen reached 12%. Of course, the protection range in the present invention is not limited to only point values, and a range around the point values is the protection range in the present invention, in which the temperature alarm value is 52 ℃ to 58 ℃, the temperature interlock value is optimally 59 ℃ to 61 ℃, and the gas phase oxygen content alarm value is: the molar concentration of the oxygen reaches 7-9%, and the gas-phase oxygen content interlocking value is as follows: the molar concentration of the oxygen reaches 11 to 13 percent. For example, when the detected temperature value is 56 ℃, the alarm module is started to inform a worker to carry out maintenance, or when the detected gas-phase oxygen content reaches 8.1%, the alarm module is started. When the detected temperature value is 65 ℃ and the gas-phase oxygen content reaches 12%, the oxidation interlocking equipment is started, so that the feeding and the discharging on the oxidation reactor are completely stopped; and the nitrogen module is started to inject nitrogen into the gas-liquid separator for dilution.
For the extraction column: in the present invention, an optimized scheme for alarm values and interlock values is obtained from production experiments, wherein the alarm value for temperature is optimally 52 ℃, the temperature interlock value is optimally 62 ℃, and the gas phase oxygen content alarm value is: the molar concentration of the oxygen reaches 8 percent, and the gas-phase oxygen content interlocking value is as follows: the molar concentration of oxygen reached 16%. Of course, the protection range in the present invention is not limited to only the point value, and a range around the point value is the protection range of the present invention. For example, when the detected temperature value is 51 ℃, the alarm module can be started to inform a worker to carry out maintenance, or the alarm module is started when the detected gas-phase oxygen content reaches 7.9%. In the invention, the temperature alarm value is 50-55 ℃, and the temperature interlocking value is optimally 60-65 ℃; the gas phase oxygen content alarm value is: the molar concentration of the oxygen reaches 7-9%, and the gas-phase oxygen content interlocking value is as follows: the molar concentration of oxygen reaches 15-17%.
For the purification column: in the invention, an optimization scheme about an alarm value and an interlocking value is obtained according to a production experiment, wherein the temperature alarm value is optimally 52 ℃, the temperature interlocking value is optimally 62 ℃, the protection range in the invention is not limited to point values, the temperature alarm value is 50-55 ℃, and the temperature interlocking value is 60-65 ℃.
The invention also provides a safety control method of the slurry bed anthraquinone method hydrogen peroxide device, and the slurry bed anthraquinone method hydrogen peroxide device comprises the following steps: a hydrogenation reactor, an oxidation reactor, an extraction column and a purification column connected in series, the process comprising one or more of:
detecting the pressure, the temperature and the gas-phase oxygen content on a hydrogenation reactor, and performing interlocking control on the feeding and discharging of the hydrogenation reactor and the input of the nitrogen according to the detection result;
detecting the temperature and the gas-phase oxygen content on the oxidation reactor, and performing interlocking control on the feeding and discharging of the oxidation reactor and the input of the nitrogen gas according to the detection result;
detecting the temperature and the gas-phase oxygen content on the extraction tower, and performing interlocking control on the feeding and discharging of the oxidation reactor through the detection result;
and detecting the temperature on the purification tower, and performing interlocking control on the feeding and discharging of the purification tower through the detection result.
According to the technical scheme, when the safety control system of the slurry bed anthraquinone method hydrogen peroxide device is used, the interlocking module arranged on the hydrogenation reactor performs interlocking control on the feeding and discharging of the hydrogenation reactor and the starting of the nitrogen module according to the pressure detection value, the temperature detection value and the gas-phase oxygen content detection value obtained from the hydrogenation reactor; the interlocking module arranged on the oxidation reactor performs interlocking control on the feeding and discharging of the oxidation reactor and the starting of the nitrogen module according to the temperature detection value and the gas-phase oxygen content detection value obtained from the oxidation reactor; the interlocking module arranged on the extraction tower performs interlocking control on the feeding and discharging of the extraction tower according to the temperature detection value and the gas-phase oxygen content detection value obtained on the extraction tower; the interlocking module arranged on the purification tower is arranged on the interlocking module on the purification tower. The independent interlocking module carries out interlocking control and then separately controls according to the interlocking logics in one-to-one correspondence, thereby overcoming the problems that the safety of hydrogen peroxide production control in the prior art is not perfect, the false alarm rate of some control is very high, and the false triggering caused by instrument faults can also occur.
As shown in fig. 4, in the hydrogenation reaction,
detecting the temperature in the hydrogenation reactor;
detecting the gas-phase oxygen content and the pressure in the gas-liquid separator;
judging the detection result, and responding according to the judgment result:
cutting off the hydrogen feed to the hydrogenation reactor when the detected pressure is greater than the pressure interlock value and/or the detected temperature is greater than the temperature interlock value; and when the detected gas-phase oxygen content is greater than the gas-phase oxygen content interlocking value, cutting off the hydrogen input into the hydrogenation reactor, and injecting inert gas into a gas-liquid separator on the hydrogenation reactor.
In the above scheme, after the temperature in the hydrogenation reactor is detected, the temperature can be sent to the first hydrogenation interlock device by using a remote transmission device for judgment, the same detected pressure and gas-phase oxygen content can also be remotely transmitted to the corresponding interlock device by using the remote transmission device for judgment, the logic of interlock is controlled according to the above rules, and for the temperature remote transmission device, for example, a temperature remote transmission instrument on the market can be used, so that the remote transmission of temperature information is realized.
In a preferred embodiment of the invention, an alarm is given when the detected pressure is greater than the pressure alarm value and less than the pressure interlock value, and/or the detected temperature is greater than the temperature alarm value and less than the temperature interlock value, and/or the detected gas-phase oxygen content is greater than the gas-phase oxygen content alarm value and less than the gas-phase oxygen content interlock value. The alarm is started when the alarm value reaches the interlocking value, so that the staff is informed to carry out maintenance in time to prevent larger accidents, the alarm mode can be a sound-light alarm mode,
however, in the actual use process, due to the influence of various shelters and the situation that the staff leaves the site, the staff cannot timely acquire the alarm signal, and the maintenance is not timely, so that in order to avoid the problem, a communication alarm technology can be added, namely, a wireless transmission module and other communication technologies are utilized to send a wireless signal to the staff to timely inform the staff.
In a preferred embodiment of the present invention, the hydrogen buffer tank is used to buffer the hydrogen gas introduced into the hydrogenation reactor, and the pressure in the hydrogen buffer tank is also detected; and the larger one of the detection result and the gas-liquid separator pressure detection result is used for controlling the system.
In the scheme, the external high-pressure hydrogen passes through the hydrogen buffer tank after being decompressed and then enters the hydrogenation reactor, and a hydrogen flow regulating valve and a stop valve are arranged on the hydrogen buffer tank inlet. And the hydrogen buffer tank also carries out pressure detection to obtain a pressure detection value P2; detecting the pressure in the gas-liquid separator to obtain a pressure detection value P1, wherein the larger one of P1 and P2 gives an alarm when the larger one of P1 and P2 is larger than a pressure alarm value; cutting off the hydrogen feed to the hydrogenation reactor when the greater of P1 and P2 is greater than the pressure interlock value; the interlock control logic of the first hydrogenation interlock device for the pressure detection module and the pressure detection module is as follows: the larger of the two is selected for interlock control.
In the preparation process of hydrogen peroxide, high-pressure hydrogen is firstly introduced into the device, but for the sake of safety and ensuring the normal work of the interlocking equipment, the high-pressure hydrogen needs to be decompressed and buffered. When the system works, the larger one of the detection result and the gas-liquid separator pressure detection result controls the system, namely, the interlocking response is carried out as long as one pressure value is larger than the pressure interlocking value. This ensures the security of the system. The pressure interlock value in the present invention is set to the lowest design pressure of all the devices involved in hydrogenation, and the pressure alarm value may be set to a value less than the pressure interlock value.
Preferably, the hydrogen flow regulating valve and the stop valve arranged on the hydrogen buffer tank inlet can be electronic valves and can be controlled by wireless signals, so that the remote control of workers is facilitated, and the control opportunity can be ensured to be more timely.
In a preferred embodiment of the present invention, the temperature in the hydrogenation reactor is detected by detecting the temperatures at different heights, and at least three sets of temperature detection results are obtained; when the temperature value detected by any group of temperature detection modules is greater than a temperature alarm value, alarming; when the temperature value detected by any group of temperature detection modules is greater than the temperature interlocking value and the detected pressure is less than the pressure interlocking value, alarming; and when the temperature values detected by the two or more temperature detection modules are greater than the temperature interlocking value, alarming and cutting off the hydrogen feeding of the hydrogenation reactor.
In the scheme, the temperatures of a plurality of parts with different heights in the hydrogenation reactor are detected, so that the problem of false triggering easily caused by false indication due to uneven heat transfer of a system to cause interlocking fault is avoided, equipment such as a device instrument also breaks down to cause unprepared detection results, and the whole production process is influenced. Of course, the number of the temperature detection modules in the invention is not limited to three, and more than three modules are theoretically possible, and are not described again.
As shown in fig. 5, during the oxidation reaction, the oxidation unit includes: the oxidation reactor and a gas-liquid separator are arranged at the top of the oxidation reactor; the safety control method comprises the following steps:
detecting a temperature in the oxidation reactor;
detecting the gas-phase oxygen content on the gas-liquid separator;
judging the detection result, and responding according to the judgment result:
when the detected temperature is greater than the temperature interlocking value and the detected gas-phase oxygen content is greater than the gas-phase oxygen content interlocking value, stopping feeding and discharging on the oxidation reactor; and injecting nitrogen into the gas-liquid separator;
when the detected gas-phase oxygen content is greater than the gas-phase oxygen content extreme value, stopping feeding and discharging on the oxidation reactor; and injecting nitrogen into the gas-liquid separator.
In the scheme, the novel interlocking logic designed in the invention can start the interlocking response only under the condition that the temperature and the gas-phase oxygen content both exceed the interlocking value: stopping all of the feed and discharge to the oxidation reactor; and nitrogen is injected into the gas-liquid separator, so that the gas in the gas-liquid separator is diluted, and accidents such as explosion are prevented. Once the interlocking response is started, the whole production needs to be stopped, and after nitrogen is injected, the produced raw materials and products need to be replaced again, so the start of the interlocking response also needs to be careful, therefore, in the invention, the temperature and the gas-phase oxygen content are interlocked to control the oxidation interlocking equipment, the fault tolerance rate can be effectively improved, and small faults can be treated in a worker overhauling mode, so the production efficiency is also ensured.
In a preferred embodiment of the invention, an alarm is given when the detected temperature is greater than the temperature alarm value and less than the temperature interlock value and/or the detected gas-phase oxygen content is greater than the gas-phase oxygen content alarm value and less than the temperature interlock value; and when the detected temperature is greater than the temperature interlocking value or the detected gas-phase oxygen content is greater than the gas-phase oxygen content interlocking value, alarming.
In the scheme, an alarm value and an alarm function are added to improve the safety of the system, because the interlocking start is the bottom line of the system safety, some safety measures are required before the safety bottom line is reached. The invention is also provided with an alarm value which is smaller than the interlock value, and when the detection value of the temperature or the gas-phase oxygen content exceeds the alarm value but does not reach the interlock value, a series of alarm reminding measures are carried out, so that the staff is informed to carry out maintenance, the condition of some interlock response starting can be avoided to a certain extent, some losses in production are reduced, the safety is further improved, and the two things are achieved at one stroke.
In a preferred embodiment of the invention, the temperatures at different levels in the oxidation reactor are detected; at least three groups of temperature detection results of different height positions of the oxidation reactor are obtained; when the temperature detected by any one group of temperature detection modules is greater than the temperature interlocking value and the gas-phase oxygen content detection value is less than the gas-phase oxygen content interlocking value, alarming; when the temperatures detected by two or more groups of temperature detection modules are greater than a temperature interlocking value, alarming is carried out, and feeding of air and hydrogenation liquid on the oxidation reactor is cut off; when the temperature detected by any one group of temperature detection modules is greater than the temperature interlocking value and the gas-phase oxygen content detection value is greater than the gas-phase oxygen content interlocking value, alarming is carried out, feeding of air and hydrogenated liquid on the oxidation reactor is cut off, and nitrogen is filled into the gas-liquid separator.
In the scheme, the temperatures at different heights in the oxidation reactor are detected, so that the detection accuracy is improved, the problems of temperature unevenness and even instrument faults can occur in the production process, the problems can cause the interlocking faults in a common interlocking system, and the system can avoid the problems of false indication caused by uneven heat transfer of a system and the interlocking faults caused by the instrument faults.
In the invention, the interlocking logic is reset as follows: only one temperature detection value reaches the interlocking value, the oxidation interlocking device does not respond, only alarms to inform workers to overhaul, the interlocking false alarm rate is greatly reduced, and false triggering caused by instrument faults is prevented. Of course, the number of the temperature detection values is not limited to three, and more than three temperature detection values can be theoretically detected, and the description is omitted.
As shown in fig. 6, in the extraction process, the extraction unit includes an extraction column;
respectively detecting the temperature and the gas-phase oxygen content in the extraction tower; when the detected temperature is higher than the temperature interlocking value, cutting off all the feeding materials of the extraction tower, and flushing the interior of the extraction tower; when the gas phase oxygen content is larger than the gas phase oxygen content interlocking value, cutting off all feeding materials of the extraction tower, and injecting nitrogen into the extraction tower.
In the scheme, the extraction tower is used for extracting the produced hydrogen peroxide, and a large amount of hydrogen peroxide is arranged at the bottom of the extraction tower so as to prevent the hydrogen peroxide from being decomposed out of control, so that accidents such as explosion and the like occur. In the invention, the temperature and the gas-phase oxygen content are monitored on line, and are separately subjected to interlocking control by two sets of interlocking control methods, when the decomposition severity of hydrogen peroxide is low, the gas-phase oxygen content at the top is increased to reach an interlocking value, the oxygen-containing gas stops entering the oxidizing liquid, pure water is kept to be continuously introduced into the extraction tower, and nitrogen is introduced to dilute the gas inside; when the decomposition of hydrogen peroxide is serious, the temperature rises rapidly to reach a temperature interlocking value, the extraction work is stopped completely, emergency cooling water is introduced, and simultaneously the materials are discharged. Thereby ensuring the safety of the system.
In a preferred embodiment of the invention, an alarm is given when the detected temperature is greater than the temperature alarm value and less than the temperature interlock value and/or the detected gas-phase oxygen content is greater than the gas-phase oxygen content alarm value and less than the gas-phase oxygen content interlock value.
In the scheme, an alarm value and an alarm function are added to improve the safety of the system, because the interlocking start is the bottom line of the system safety, some safety measures are required before the safety bottom line is reached. The invention is also provided with an alarm value which is smaller than the interlock value, and when the detection value of the temperature or the gas-phase oxygen content exceeds the alarm value but does not reach the interlock value, a series of alarm reminding measures are carried out, so that the staff is informed to carry out maintenance, the condition of some interlock response starting can be avoided to a certain extent, some losses in production are reduced, the safety is further improved, and the two things are achieved at one stroke.
In a preferred embodiment of the present invention, the temperatures at different heights in the extraction column are detected, and at least two sets of temperatures at different heights are detected; when the temperature detected by any group of temperature detection modules is greater than the temperature interlocking value, the alarm module starts to alarm; when the temperatures detected by the two or more groups of temperature detection modules are greater than the temperature interlocking value, the first extraction interlocking equipment is started, all feeding materials of the extraction tower are cut off, and the interior of the extraction tower is washed.
In the scheme, the temperatures at different heights in the extraction tower are detected, so that the detection accuracy is improved, the problems of temperature unevenness and even instrument faults can occur in the production process, the problems can cause interlocking faults in a common interlocking system, and the system can avoid the problems of false indication caused by uneven heat transfer of a system and interlocking faults caused by instrument faults.
In the invention, the interlocking logic is reset as follows: only one temperature detection value reaches the interlocking value, the interlocking device does not respond, only alarms to inform workers to overhaul, the interlocking false alarm rate is greatly reduced, and false triggering caused by instrument faults is prevented. Of course, the number of the temperature detection values in the invention is not limited to two, and more than two temperature detection values can be theoretically possible, and the description is omitted.
In a preferred embodiment of the present invention, the liquid after the washing of the extraction column is discharged to the accident pool, and the inside of the discharge pipe is washed with desalted water.
The safety control method provided by the invention adopts alarming and interlocking measures, overcomes the problem that the safety of hydrogen peroxide production control in the prior art is not perfect enough, has higher fault-tolerant rate and avoids the problem of invalid interlocking.
In the scheme, a large amount of hydrogen peroxide is attached to the discharge pipeline in the process of completely discharging the materials in the extraction tower, so that potential safety hazards still exist.
As shown in fig. 3, in the purification process, the purification unit includes a purification tower,
detecting the temperature in the purification tower;
when the detected temperature is greater than the temperature alarm value and less than the temperature interlocking value, alarming;
and when the detected temperature is higher than the temperature interlocking value, alarming, cutting off all feeding materials of the purification tower, discharging the materials in the purification tower, and injecting nitrogen into the purification tower.
In the scheme, the produced hydrogen peroxide is input into the purification tower for purification treatment, the temperature in the purification tower is monitored at present in order to prevent the hydrogen peroxide from being decomposed out of control in the purification tower, the detected temperature is related to the purification interlocking equipment, when the system temperature exceeds a temperature interlocking value, the system automatically stops feeding of the purification tower and discharges materials in the purification tower, and the nitrogen module injects nitrogen into the purification tower to dilute internal gas and damage the explosion environment, so that the safety of the system is improved.
In a preferred embodiment of the present invention, an alarm is given when the detected temperature inside the purification tower is greater than the temperature alarm value and less than the temperature interlock value.
In the scheme, an alarm value and an alarm function are added to further improve the safety of the system, because the interlocking start is the bottom line of the system safety, and some safety measures are required before the safety bottom line is reached. In the invention, the purification interlocking equipment is also provided with an alarm value, the alarm value is smaller than the interlocking value, and when the temperature detection value exceeds the alarm value but does not reach the interlocking value, a series of alarm reminding measures are carried out, so that a worker is informed to carry out maintenance, the starting condition of some purification interlocking equipment can be avoided to a certain extent, thus some losses in production are reduced, the safety is further improved, and the two things are achieved at one stroke.
In a preferred embodiment of the present invention, the temperatures at different heights in the purification tower are detected, and at least three sets of temperature detection results are obtained; when the temperature detected by any group of temperature detection modules is greater than the temperature interlocking value, the alarm module starts to alarm; when two sets of temperature that detect module detected more than and more than when the temperature interlocking value, alarm module starts to report to the police, just purification interlock equipment starts, cuts off all feeds into of purification tower, discharges the material in the purification tower, just nitrogen gas module injects nitrogen gas into the purification tower.
In the scheme, at least three groups of temperature detection values are obtained on the purification tower, so that the detection accuracy is effectively improved, and the problems of temperature unevenness and even instrument faults can occur in the production process, and the problems can cause interlocking faults in a common interlocking system.
In the invention, the acquisition positions of a plurality of temperature detection values are generally acquired only by different heights on the purification tower, for example: the device is respectively arranged at the top, the middle and the bottom of the purification tower for temperature acquisition, carries out temperature detection on different positions in the purification tower, and acquires the accurate temperature in the purification tower in an all-round way, and the invention also resets the interlocking logic: only one temperature detection value reaches the interlocking value, the interlocking response is not started, only an alarm is given to inform a worker to overhaul, the interlocking false alarm rate is greatly reduced, and false triggering caused by instrument faults is prevented. Of course, the number of the temperature detection values is not limited to three, and more than three temperature detection values can be theoretically detected, and the description is omitted.
In a preferred embodiment of the present invention, the liquid in the purification tower is discharged to an accident basin, and the discharge pipe is flushed with desalinated water.
In the scheme, after the interlocking response is started, all hydrogen peroxide in the purification tower is discharged, but a large amount of hydrogen peroxide is attached to the inside of the discharge pipeline in the discharging process, so that the potential safety hazard still exists.
In a preferred embodiment of the present invention, the liquid used for flushing needs to be non-reactive with the hydrogen peroxide, and the remaining liquid does not affect the normal subsequent purification operation.
The preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, however, the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the technical idea of the present invention, and these simple modifications are within the protective scope of the present invention.
It should be noted that the various technical features described in the above embodiments can be combined in any suitable manner without contradiction, and the invention is not described in any way for the possible combinations in order to avoid unnecessary repetition.
In addition, any combination of the various embodiments of the present invention is also possible, and the same should be considered as the disclosure of the present invention as long as it does not depart from the spirit of the present invention.

Claims (10)

1. A safety control system of a purification unit of an anthraquinone method hydrogen peroxide device is disclosed, wherein the purification unit comprises a purification tower and is characterized in that;
the safety control system includes: the purification interlocking device, the temperature detection module and the nitrogen module are respectively arranged on the purification tower; wherein,
setting a temperature interlocking value on the purification interlocking equipment;
when the temperature detected by the temperature detection module is higher than the temperature interlocking value, the purification interlocking equipment is started, all feeding materials of the purification tower are cut off, the materials in the purification tower are discharged, and the nitrogen module injects nitrogen into the purification tower.
2. The safety control system of the purification unit of the anthraquinone process hydrogen peroxide device according to claim 1, further comprising: the alarm module is used for setting a temperature alarm value on the purification interlocking equipment; wherein,
and when the temperature detected by the temperature detection module is greater than the temperature alarm value and less than the temperature interlocking value, the alarm module starts to alarm.
3. The safety control system of the purification unit of the anthraquinone process hydrogen peroxide device according to claim 1, wherein the temperature detection modules are at least three groups and are arranged on the purification tower at intervals along the vertical direction.
4. The safety control system of the purification unit of the anthraquinone process hydrogen peroxide device according to claim 3, which is characterized in that,
when the temperature detected by any group of temperature detection modules is greater than the temperature interlocking value, an alarm module is started to alarm;
when two sets of temperature that detect module detected more than and more than when the temperature interlocking value, alarm module starts to report to the police, just purification interlock equipment starts, cuts off all feeds into of purification tower, discharges the material in the purification tower, just nitrogen gas module injects nitrogen gas into the purification tower.
5. The safety control system of the purification unit of the anthraquinone process hydrogen peroxide device according to claim 1, wherein a flushing module is further arranged on the emergency discharging module at the bottom of the purification tower to flush the hydrogen peroxide in the emergency discharging module.
6. A safety control method for a purification unit of an anthraquinone process hydrogen peroxide device is disclosed, wherein the purification unit comprises a purification tower and is characterized in that;
detecting the temperature in the purification tower;
and when the detected temperature is higher than the temperature interlocking value, cutting off all feeding materials of the purification tower, discharging the materials in the purification tower, and injecting nitrogen into the purification tower.
7. The safety control method of the purification unit of the anthraquinone process hydrogen peroxide device according to claim 6, wherein when the detected temperature in the purification tower is greater than a temperature alarm value and less than a temperature interlock value, an alarm is given.
8. The safety control method of the purification unit of the anthraquinone process hydrogen peroxide device according to claim 6, wherein the temperatures at different heights in the purification tower are detected, and at least three groups of temperature detection results are obtained.
9. The safety control method of the purification unit of the anthraquinone process hydrogen peroxide device according to claim 8, which is characterized in that,
when the temperature detected by any group of temperature detection modules is greater than the temperature interlocking value, alarming;
and when the temperatures detected by two or more groups of temperature detection modules are greater than the temperature interlocking value, all feeding materials of the purification tower are cut off, the materials in the purification tower are discharged, and the nitrogen module injects nitrogen into the purification tower.
10. The safety control method of the purification unit of the anthraquinone process hydrogen peroxide device according to claim 6, wherein the liquid in the purification tower is discharged into an accident pool, and the residual hydrogen peroxide in a discharge pipeline is washed.
CN201910499869.8A 2019-06-11 2019-06-11 Safety control system and control method for purification unit of anthraquinone method hydrogen peroxide device Pending CN112068492A (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103677023A (en) * 2013-12-20 2014-03-26 河北都邦石化工程设计有限公司 Safety interlock control method and system for slurry reactor hydrogen peroxide device oxidation tower
CN104007675A (en) * 2014-04-11 2014-08-27 中国石油化工股份有限公司 Control method for preventing explosion of oxidized tail gas in technology for producing hydrogen peroxide with anthraquinone method
CN104317317A (en) * 2014-09-25 2015-01-28 中国石油化工股份有限公司 Method for controlling the content of hydrogen peroxide in working solution for technology of preparing hydrogen peroxide by anthraquinone process
CN104555936A (en) * 2014-12-22 2015-04-29 湖北三宁化工股份有限公司 Safety interlock control system and control method for fixed bed anthraquinone process hydrogen peroxide device
CN105621367A (en) * 2014-11-03 2016-06-01 中国石油化工股份有限公司 Emergent shutdown method for extraction device in production of hydrogen peroxide by anthraquinone process

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103677023A (en) * 2013-12-20 2014-03-26 河北都邦石化工程设计有限公司 Safety interlock control method and system for slurry reactor hydrogen peroxide device oxidation tower
CN104007675A (en) * 2014-04-11 2014-08-27 中国石油化工股份有限公司 Control method for preventing explosion of oxidized tail gas in technology for producing hydrogen peroxide with anthraquinone method
CN104317317A (en) * 2014-09-25 2015-01-28 中国石油化工股份有限公司 Method for controlling the content of hydrogen peroxide in working solution for technology of preparing hydrogen peroxide by anthraquinone process
CN105621367A (en) * 2014-11-03 2016-06-01 中国石油化工股份有限公司 Emergent shutdown method for extraction device in production of hydrogen peroxide by anthraquinone process
CN104555936A (en) * 2014-12-22 2015-04-29 湖北三宁化工股份有限公司 Safety interlock control system and control method for fixed bed anthraquinone process hydrogen peroxide device

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
胡元旭: "SIS系统在蒽醌法固定床双氧水装置上的应用", 《大氮肥》 *

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