CN111111574B - Monitoring device and monitoring method for polyester reactor - Google Patents
Monitoring device and monitoring method for polyester reactor Download PDFInfo
- Publication number
- CN111111574B CN111111574B CN201910983475.XA CN201910983475A CN111111574B CN 111111574 B CN111111574 B CN 111111574B CN 201910983475 A CN201910983475 A CN 201910983475A CN 111111574 B CN111111574 B CN 111111574B
- Authority
- CN
- China
- Prior art keywords
- polyol
- outer cover
- condenser
- glass outer
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 229920000728 polyester Polymers 0.000 title claims abstract description 96
- 238000012806 monitoring device Methods 0.000 title claims abstract description 31
- 238000012544 monitoring process Methods 0.000 title claims abstract description 31
- 238000000034 method Methods 0.000 title claims abstract description 25
- 229920005862 polyol Polymers 0.000 claims abstract description 151
- 150000003077 polyols Chemical class 0.000 claims abstract description 151
- 239000011521 glass Substances 0.000 claims abstract description 106
- 239000000498 cooling water Substances 0.000 claims abstract description 61
- 238000005507 spraying Methods 0.000 claims abstract description 59
- 229920002545 silicone oil Polymers 0.000 claims abstract description 42
- 238000001816 cooling Methods 0.000 claims abstract description 29
- 239000007921 spray Substances 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 23
- 238000010992 reflux Methods 0.000 claims description 26
- 238000006116 polymerization reaction Methods 0.000 claims description 20
- 238000004519 manufacturing process Methods 0.000 claims description 18
- 238000005886 esterification reaction Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 13
- 230000032050 esterification Effects 0.000 claims description 12
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 230000000007 visual effect Effects 0.000 claims description 11
- 238000011010 flushing procedure Methods 0.000 claims description 8
- 238000006068 polycondensation reaction Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 4
- 238000005520 cutting process Methods 0.000 claims description 4
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 239000002253 acid Substances 0.000 claims description 3
- 230000001105 regulatory effect Effects 0.000 description 7
- 238000011161 development Methods 0.000 description 6
- 239000000835 fiber Substances 0.000 description 6
- 230000001276 controlling effect Effects 0.000 description 5
- 229920001707 polybutylene terephthalate Polymers 0.000 description 4
- -1 polyethylene terephthalate Polymers 0.000 description 4
- 229920000139 polyethylene terephthalate Polymers 0.000 description 4
- 239000005020 polyethylene terephthalate Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- 239000000047 product Substances 0.000 description 4
- 230000008859 change Effects 0.000 description 3
- 229920001230 polyarylate Polymers 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 description 2
- WOZVHXUHUFLZGK-UHFFFAOYSA-N dimethyl terephthalate Chemical compound COC(=O)C1=CC=C(C(=O)OC)C=C1 WOZVHXUHUFLZGK-UHFFFAOYSA-N 0.000 description 2
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 229920001225 polyester resin Polymers 0.000 description 2
- 239000004645 polyester resin Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 239000012752 auxiliary agent Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 239000013067 intermediate product Substances 0.000 description 1
- QQVIHTHCMHWDBS-UHFFFAOYSA-L isophthalate(2-) Chemical compound [O-]C(=O)C1=CC=CC(C([O-])=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-L 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000003348 petrochemical agent Substances 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 150000007519 polyprotic acids Polymers 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 150000005846 sugar alcohols Polymers 0.000 description 1
- 229920002725 thermoplastic elastomer Polymers 0.000 description 1
- 229920006346 thermoplastic polyester elastomer Polymers 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/0006—Controlling or regulating processes
- B01J19/0013—Controlling the temperature of the process
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08G—MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING UNSATURATED CARBON-TO-CARBON BONDS
- C08G63/00—Macromolecular compounds obtained by reactions forming a carboxylic ester link in the main chain of the macromolecule
- C08G63/78—Preparation processes
- C08G63/785—Preparation processes characterised by the apparatus used
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Polyesters Or Polycarbonates (AREA)
- Other Resins Obtained By Reactions Not Involving Carbon-To-Carbon Unsaturated Bonds (AREA)
Abstract
The invention discloses a monitoring device and a monitoring method for the interior of a polyester reactor. The device comprises a glass outer cover, a camera, a condenser, a polyol spraying device, a cable sheath, a display, a booster pump, a flange cover plate and an automatic temperature and flow control system; the flange cover plate is arranged at the bottom end of the glass outer cover to seal the bottom end opening of the glass outer cover; the glass outer cover is internally filled with silicone oil; the flange cover plate and the glass outer cover are fixed on the wall of the polyester reactor; the cable sheath passes through the flange cover plate; a camera is arranged in the glass outer cover; the camera is internally provided with temperature detection equipment which is connected with a temperature automatic control system; the polyol spraying device is arranged outside the glass outer cover at the camera and can spray, rinse and spray for cooling; the polyol spraying device is connected with the automatic flow control system through a flow control valve; the cooling water outlet of the condenser is provided with a temperature control valve which is connected with a temperature automatic control system. The monitoring device has simple structure, is easy to implement, and can efficiently monitor the internal operation condition of the polyester reactor.
Description
Technical Field
The invention belongs to the technical field of polyester production, relates to a device and a method for monitoring a polyester polymerization reaction process, and in particular relates to a device and a method for monitoring the inside of a polyester reactor.
Background
Polyesters, which are polymers obtained by polycondensation of a polyhydric alcohol and a polybasic acid, are generally called "polymers". Mainly polyethylene terephthalate (PET), and conventionally includes polybutylene terephthalate (PBT) and polyarylate isophthalate thermoplastic resins. Is a plastic with excellent performance and wide application. Polyesters include polyester resins and polyester elastomers. The polyester resin in turn includes polyethylene terephthalate (PET), polybutylene terephthalate (PBT), polyarylate (PAR), and the like. Polyester elastomers (TPEEs) are typically polymerized from dimethyl terephthalate, 1, 4-butanediol, and polybutanol, with segments comprising hard and soft segments being thermoplastic elastomers. The fiber-grade polyester is used for manufacturing polyester staple fibers and polyester filaments, is a raw material for processing fibers and related products in a polyester fiber enterprise, and is taken as a variety with the largest yield in chemical fibers, and occupies about 80% of market share in the chemical fiber industry, so that market change and development trend of polyester series are important points of attention in the chemical fiber industry. Meanwhile, the polyester also has the applications of bottles, films and the like, and is widely applied to the fields of packaging industry, electronic and electric appliances, medical and health, construction, automobiles and the like. It can be said that polyester is an important intermediate product connecting petrochemicals and various industrial products.
The polyester industry in China has made great development and progress in recent years, and the upstream and downstream industry chains are continuously regulated, improved and optimized. However, there are many problems in the actual development process, such as a great decrease in economic efficiency of industry, a decrease in operating rate, and the like. Along with the continuous adjustment of the industrial chain structure, the sustainable development of the industrial chain is promoted, the development of novel differential polyester products is particularly important, but because the polyester reactors (polyester reactors for short, including esterification reactors and polycondensation reactors) are mostly made of opaque steel and steel in a sealing way, the situation that materials in the polyester polymerization reaction run, gas-liquid trend in the esterification and polycondensation reactions, materials circulate in the reactors and the like lacks practical monitoring means can only be solved by theoretical reasoning, and the uncertainty of the material reaction leads to the phenomena of uneven distribution of polymer molecular chains, yellow color values of products, material flushing towers, raw material blockage and the like in the actual production process.
Therefore, there is a need to develop an internal monitoring device and monitoring method for a polyester reactor which can efficiently monitor the polymerization process of polyester.
Disclosure of Invention
The purpose of the invention is that: the device and the method for monitoring the inside of the polyester reactor can effectively solve the problem that the polymerization state is difficult to monitor.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an internal monitoring device for a polyester reactor, which is installed on the wall of the polyester reactor for use, comprising: the device comprises a glass outer cover, a camera, a polyol cooling device (condenser), a polyol spraying device, a cable sheath, a display, a booster pump, a flange cover plate, an automatic temperature control system and an automatic flow control system; the flange cover plate is arranged at the bottom end of the glass outer cover, and an opening at the bottom end of the glass outer cover is sealed; the glass outer cover is internally filled with silicone oil; the flange cover plate and the glass outer cover are fixedly connected with the wall of the polyester reactor; the flange cover plate is provided with an opening, and a cable sheath is inserted into the opening; a plurality of cameras are arranged in the glass outer cover; a temperature detection device is arranged inside the camera; the display is arranged outside the polyester reactor and is connected with the automatic temperature control system and the automatic flow control system; the temperature detection equipment in the camera is connected with the input end of the temperature automatic control system; a cable connected with the temperature automatic control system by the temperature detection equipment in the camera is positioned in the cable sheath; the spray head of the polyol spray device is arranged outside the glass outer cover at the camera and can be aligned to the outer surface of the glass outer cover at the camera for spraying; the condenser is provided with a polyol inlet, a polyol outlet, a cooling water inlet and a cooling water outlet; the tail part of the polyol spraying device is connected with a polyol outlet of the condenser through a flow control valve; the flow control valve is connected with the output end of the flow automatic control system; the reflux polyol outlet of the condenser is provided with a flow transmitter which is connected with the input end of the flow automatic control system; a cooling water inlet of the condenser is provided with a stop valve, and a cooling water outlet of the condenser is provided with a temperature control valve; the temperature control valve is connected with the output end of the temperature automatic control system; when the camera monitors that the visual condition, namely the visibility, of the glass outer cover reaches the low limit, a booster pump is started, and reflux polyol enters a polyol cooling device, namely a condenser, from a polyol inlet, then enters a polyol spraying device through a flow control valve after exiting from a polyol outlet of the condenser, and is sprayed and washed against the outer surface of the glass outer cover at the camera; when the temperature detection equipment in the camera detects that the temperature of the silicone oil in the glass outer cover exceeds the upper limit, the temperature automatic control system automatically controls a temperature control valve of a cooling water outlet of the condenser to be opened (a stop valve of a cooling water inlet of the condenser is always opened) and is communicated with cooling water, so that the temperature of a polyol outlet of a polyol cooling device (condenser) is reduced, namely, the polyol is cooled, and the silicone oil in the glass outer cover is sprayed and cooled through a polyol spraying device, so that the temperature of the silicone oil in the glass outer cover is controlled; meanwhile, the opening degree of the flow control valve is automatically controlled through the flow automatic control system, namely the flow of the polyol entering the spray is automatically controlled.
Further, the camera is interlocked with a motor of the booster pump; when the camera monitors that the visual condition of the glass outer cover reaches the low limit, the linkage system automatically starts the booster pump, and the reflux polyol enters the polyol cooling device, namely the condenser, from the polyol inlet.
Further, the cross section of the glass outer cover is U-shaped, and the bottom edge of the bottom end of the glass outer cover is turned outwards; the outward turned bottom edge of the glass outer cover is inserted between the flange cover plate and the wall of the polyester reactor; the flange cover plate is fixedly connected with the wall of the polyester reactor through bolts.
Further, the polyester reactor is an esterification reactor and/or a polycondensation reactor. The monitoring device can be applied to an esterification reactor and a polycondensation reactor in the polyester production process (namely in the polyester polymerization process).
Further, the camera is a high-definition high-temperature-resistant camera. The glass outer cover is a high-strength glass outer cover.
Further, the polyol spraying device is provided with two sets; the spray heads of the two sets of polyol spray devices are respectively arranged at two sides of the outer glass cover at the camera; the tail parts of the two sets of polyol spraying devices are respectively connected with the polyol outlets of the condenser through flow control valves c and d.
Further, the blind plate is arranged outside the monitoring device inside the polyester reactor, and can be used for replacing the flange cover plate to isolate materials in time when leakage caused by the monitoring device occurs (when leakage occurs at the flange cover plate) in the polyester reaction process so as to ensure stable operation of polyester production. Can be replaced at any time when leakage occurs so as to ensure the stable operation of the polymerization device.
In polyester production, the monitoring device is respectively arranged on the esterification reactor and the kettle wall (the wall) of the polyester reactor, and is connected with an external display through a camera to monitor the internal operation condition (including the material reaction condition) of the reactor.
In the technical scheme, the polyol spraying device is core equipment in the monitoring device, and the outer surface of the high-strength glass outer cover at the position of the reflux polyol spraying camera is connected, so that the influence on the sight of the camera due to the fact that the oligomer generated in the polyester polymerization reaction gathers on the outer surface of the glass outer cover is avoided. The polyol spraying device has two functions, one is a spraying and flushing function and the other is a spraying and cooling function.
The polyol spraying device is connected with the esterified reflux polyol, the internal booster pump is started according to the actual visual condition of the glass outer cover monitored by the camera, the flow of the polyol entering the spraying is regulated by the flow control valve, and the outer surface of the glass outer cover is sprayed and washed (mainly washed at the moment). Can effectively solve the problem that the oligomer is attached to the wall surface of the glass outer cover or the polyester reactor.
The inside temperature detection equipment that is equipped with of camera, after the temperature detection equipment in the camera detects the ambient temperature of camera (i.e. the silicone oil temperature in the glass dustcoat) operation and surpasses the settlement upper limit value, the temperature control valve of the cooling water export of condenser (the stop valve of the cooling water import of condenser is opened always) can be opened automatically to the temperature automatic control system who is connected with temperature detection equipment, cooling down through the cooling water that gets into the condenser to get into polyol spray set's polyol, simultaneously, through spraying the surface to the glass dustcoat, the ambient temperature (i.e. the silicone oil temperature in the glass dustcoat) to the camera is cooled down (mainly is the cooling down this moment). A temperature control system (temperature automatic control system) is arranged to control the temperature of the silicone oil, so as to ensure that the camera operates at a proper temperature.
The cooling water pipeline connected with the condenser is provided with a temperature control valve connected with the temperature automatic control system, the flow of cooling water is regulated by controlling the opening of the temperature control valve on the cooling water pipeline, so that the heat exchange temperature of the polyol entering the spraying (namely the polyol outlet temperature of the condenser) is regulated, and meanwhile, the silicone oil in the glass outer cover is sprayed and cooled through the polyol spraying device, so that the control of the temperature of the silicone oil in the glass outer cover is realized, and the safe operation of the whole device can be effectively ensured.
Transparent silicone oil is filled in the glass housing where the camera is located, so that fog generated by temperature difference change in the camera is avoided, and sight is influenced (namely visibility is influenced).
The polyol spraying device is connected with the flow automatic control system, so that not only can the flow of polyol spraying be effectively controlled, but also the mole ratio of acid to alcohol in the esterification polymerization reaction in the polyester production process can be kept in a controllable range.
The monitoring method for monitoring the internal operation condition of the polyester reactor by using the internal monitoring device of the polyester reactor comprises the following steps:
1) Before monitoring the reaction condition of materials in the polyester reactor, ensuring the stable operation of the polyester polymerization reaction and having enough reflux polyol;
2) After the power supply of the display is connected, a flow control valve of a polyol outlet of the condenser is opened, a control valve of a cooling water outlet of the condenser is closed, and a stop valve of a cooling water inlet of the condenser is opened;
3) According to the visual condition (visibility) of the glass outer cover monitored by the camera, starting a booster pump, enabling reflux polyol to enter a polyol cooling device, namely a condenser, from a polyol inlet, and then entering a polyol spraying device through a flow control valve after exiting from a polyol outlet of the condenser, and spraying and flushing the outer surface of the glass outer cover at the camera;
4) According to the temperature of the silicone oil detected by temperature detection equipment in the camera, controlling cooling water of a polyol cooling device (namely a condenser); when the temperature of the silicone oil exceeds the upper limit, the temperature automatic control system automatically opens a control valve of a cooling water outlet of the condenser (a stop valve of a cooling water inlet of the condenser is always opened), and is communicated with cooling water to cool the polyol, namely, the temperature of a polyol outlet of a polyol cooling device (the condenser) is reduced, and meanwhile, the silicone oil in the glass outer cover is sprayed and cooled through a polyol spraying device, so that the temperature of the silicone oil in the glass outer cover is controlled; and the opening degree of the flow control valve is automatically controlled by the flow automatic control system, namely the flow of the polyol entering the spray is automatically controlled.
The monitoring method further comprises the following steps:
5) When leakage occurs at the flange cover plate, the flange cover plate is opened under the condition of ensuring safety, the camera is removed, the blind plate is replaced, and the polyester production is ensured to be stable.
6) After the polyester production is finished, continuously operating the booster pump for a period of time, cleaning the surface of the glass outer cover, then closing the booster pump, closing all valves, and cutting off the power supply.
The invention has the beneficial effects that:
the monitoring device has the advantages of simple structure, low manufacturing cost, easy implementation and high-efficiency monitoring of the internal operation condition of the polyester reactor. The monitoring device can effectively solve the difficult problem that the internal condition of the polyester reaction is difficult to monitor. The reactor for realizing the monitoring device can effectively monitor the reaction, meanwhile, the reaction condition after different auxiliary agents are added for developing differentiated polyester can be fully and intuitively known, and an effective data support is provided for development and research of novel polyester materials, so that the monitoring device has great economic and social benefits.
The invention designs a monitoring device capable of efficiently monitoring the polyester polymerization reaction process by utilizing the characteristics of the polyester polymer and the high-temperature-resistant monitoring device, which is certainly a relatively promising measure.
Drawings
FIG. 1 is a schematic view of the structure of the monitoring device inside the polyester reactor of the present invention.
In the figure: 1-a polyol spray device; 2-a glass housing; 3-a camera; 4-silicone oil; 5-cable sheath; 6-a display; 7-a flange cover plate; 8-a condenser; 9-a booster pump; 10-blind plates; 11-polyester reactor walls; a-refluxing a polyol inlet; b-cooling water inlet; c-a cooling water outlet; d-a reflux polyol outlet; a-a stop valve; b-a temperature control valve; c. d-a flow control valve.
Detailed Description
The invention will be further illustrated with reference to specific examples.
Example 1
As shown in fig. 1, the present invention is a monitoring device for the inside of a polyester reactor, comprising: camera 3 (Gao Qingnai high-temperature camera), polyol cooling device (i.e. condenser 8), polyol spraying device 1, cable jacket 5, glass housing 2 (high-strength glass housing), display 6, temperature automatic control system, booster pump 9, flange cover 7, blind flange 10, temperature automatic control system, flow automatic control system; the section of the glass outer cover 2 is U-shaped, and the bottom edge of the bottom end of the glass outer cover 2 is turned outwards; the flange cover plate 7 is arranged at the bottom end of the glass outer cover 2 and seals the opening (blocking) at the bottom end of the glass outer cover 2; the glass outer cover 2 is filled with silicone oil; the flange cover plate 7 is fixedly connected with the wall 11 of the polyester reactor through bolts; the outward turned bottom edge of the glass outer cover 2 is inserted between the flange cover plate 7 and the polyester reactor wall 11; the flange cover plate 7 is provided with an opening, and the cable sheath 5 is inserted into the opening; a plurality of cameras 3 are arranged in the glass outer cover 2; a temperature detection device is arranged inside the camera 3; the display 6 is arranged outside the polyester reactor, and the display 6 is connected with a temperature automatic control system and a flow automatic control system; the temperature detection equipment in the camera 3 is connected with the input end of the temperature automatic control system; the cable for connecting the temperature detection equipment in the camera 3 with the automatic temperature control system is positioned in the cable sheath 5; the spray heads of the two sets of polyol spray devices 1 are respectively arranged at two sides of the outer part of the glass outer cover 2 at the camera 3 and can be aligned with the outer surface of the glass outer cover at the camera for spraying; the condenser is provided with a reflux polyol inlet A, a reflux polyol outlet D, a cooling water inlet B and a cooling water outlet C; the tail parts of the two sets of polyol spraying devices 1 are respectively connected with a reflux polyol outlet D of the condenser 8 through flow control valves c and D; the flow control valves c and d are connected with the output end of the flow automatic control system; the reflux polyol outlet D of the condenser 8 is provided with a flow transmitter which is connected with the input end of the flow automatic control system; a stop valve a is arranged at the cooling water inlet of the condenser 8, and a temperature control valve b is arranged at the cooling water outlet of the condenser 8; the temperature control valve b is connected with the output end of the temperature automatic control system; the camera 3 is interlocked with a motor of the booster pump 9; when the camera 3 monitors that the visual condition, namely the visibility, of the glass outer cover 2 reaches the low limit, the linkage system automatically starts the booster pump 9, esterified reflux polyol enters the polyol cooling device, namely the condenser 8 from the reflux polyol inlet A, then enters the polyol spraying device 1 through the flow control valves c and D after coming out from the polyol outlet D of the condenser 8, and sprays and washes the outer surface of the glass outer cover 2 at the camera 3; when the temperature detection equipment in the camera 3 detects that the temperature of the silicone oil 4 in the glass outer cover 2 exceeds the upper limit, the temperature automatic control system automatically controls the temperature control valve B of the cooling water outlet C of the condenser 8 to be opened (the stop valve a of the cooling water inlet B of the condenser 8 is always opened) and is communicated with cooling water, so that the temperature of the polyol outlet of the polyol cooling device (condenser 8) is reduced, namely, the polyol is cooled, and the silicone oil 4 in the glass outer cover 2 is sprayed and cooled through the polyol spraying device 1, so that the temperature of the silicone oil 4 in the glass outer cover 2 is controlled; simultaneously, the opening degree of the flow control valves c and d is automatically controlled by the flow automatic control system, namely, the flow of the polyol entering the spray is automatically controlled.
The polyol spraying device 1 is core equipment in the monitoring device, and is connected with the outer surface of the high-strength glass outer cover 2 at the position of the esterified reflux polyol spraying camera 3, so that the situation that oligomers generated in the esterification reaction are gathered on the outer surface of the glass outer cover 2 to influence the sight of the camera 3 is avoided. The polyol spraying device 1 has two functions, namely, a spraying and flushing function (mainly flushing) and a spraying and cooling function (mainly cooling).
The esterification reflux polyol is connected through the polyol spraying device 1, the internal booster pump 9 is started according to the actual visual condition of the glass outer cover 2 monitored by the camera 3, the flow of the polyol entering the spraying is regulated through the flow control valves c and d, and the outer surface of the glass outer cover 2 is sprayed and washed (mainly washed at the moment). Can effectively solve the problem that the oligomer is attached to the wall surface of the glass outer cover or the polyester reactor.
The inside temperature detection equipment that is equipped with of camera 3, after the temperature detection equipment in the camera 3 detects that the operation of the ambient temperature of camera 3 (i.e. the temperature of silicone oil 4 in the glass dustcoat 2) exceeds setting up the upper limit value, the temperature control valve b of the cooling water export of condenser 8 (the stop valve a of the cooling water import of condenser 8 has been opened all the time) can be opened automatically to the temperature automatic control system who is connected with temperature detection equipment, cool down the polyol that gets into polyol spray set 1 through the cooling water that gets into condenser 8, simultaneously, through spraying the surface to glass dustcoat 2, cool down (mainly cooling at this moment) the ambient temperature of camera 3 (i.e. the temperature of silicone oil 4 in the glass dustcoat 2). A temperature control system (temperature automatic control system) is arranged to control the temperature of the silicone oil, so as to ensure that the camera operates at a proper temperature.
The cooling water pipeline connected with the condenser 8 is provided with a temperature control valve connected with the temperature automatic control system, the flow of cooling water is regulated by controlling the opening of the temperature control valve b on the cooling water pipeline, namely the cooling water outlet, so that the heat exchange temperature of the polyol entering the spraying (namely the polyol outlet temperature of the condenser 8) is regulated, meanwhile, the polyol spraying device 1 is used for spraying and cooling the silicone oil 4 in the glass outer cover 2, the control of the temperature of the silicone oil in the glass outer cover is realized, and the safe operation of the whole device can be effectively ensured.
The transparent silicone oil 4 is filled in the glass outer cover 2 where the camera 3 is located, so that fog generated by temperature difference change in the camera can be avoided, and the sight line (visibility influence) is avoided.
The polyol spraying device 1 is connected with a flow automatic control system, so that not only can the flow of polyol spraying be effectively controlled, but also the mole ratio of acid to alcohol in the esterification polymerization reaction in the polyester production process can be kept in a controllable range.
The blind plate 10 is arranged outside the monitoring device inside the polyester reactor, and if leakage caused by the monitoring device occurs in the polyester reaction process, the blind plate 10 can be used for replacing the flange cover plate 7 to isolate materials in time so as to ensure stable operation of polyester production. Can be replaced at any time when leakage occurs so as to ensure the stable operation of the polymerization device.
The monitoring device inside the polyester reactor of this example was installed on the esterification reactor used in the polymerization.
Firstly, under the normal operation state of polyester polymerization, the power supply of the display 6 is connected; then, the internal operation condition of the esterification reactor is monitored by using the internal monitoring device of the polyester reactor, and the monitoring method comprises the following steps:
1) Before monitoring the reaction condition of materials in the polyester reactor, ensuring the stable operation of the polyester polymerization reaction, and having enough esterified reflux polyol;
2) After the power supply of the display 6 is turned on, the flow control valves c and d of the polyol outlet of the condenser 8 are opened, the control valve b of the cooling water outlet of the condenser 8 is closed, and the stop valve a of the cooling water inlet of the condenser 8 is opened;
3) According to the visual condition (visibility) of the glass outer cover monitored by the camera, starting a booster pump, enabling esterified reflux polyol to enter a polyol cooling device, namely a condenser, from a polyol inlet, and then entering a polyol spraying device through a flow control valve after exiting from a polyol outlet of the condenser, and spraying and flushing the outer surface of the glass outer cover at the camera;
4) According to the temperature of the silicone oil detected by temperature detection equipment in the camera, controlling cooling water of a polyol cooling device (namely a condenser 8); when the temperature of the silicone oil exceeds the upper limit, the temperature automatic control system automatically opens a control valve b of a cooling water outlet of the condenser 8 (a stop valve a of a cooling water inlet of the condenser 8 is always opened), and is communicated with cooling water to cool the polyol, namely, the temperature of a polyol outlet of a polyol cooling device (condenser) is reduced, and meanwhile, the silicone oil in the glass outer cover is sprayed and cooled through a polyol spraying device, so that the temperature of the silicone oil in the glass outer cover is controlled; and the opening degree of the flow control valve is automatically controlled by the flow automatic control system, namely the flow of the polyol entering the spray is automatically controlled.
5) When leakage occurs at the flange cover plate, the flange cover plate is opened under the condition of ensuring safety, the camera is removed, the blind plate is replaced, and the polyester production is ensured to be stable;
6) After the polyester production is finished, continuously operating the booster pump for a period of time, cleaning the surface of the glass outer cover, then closing the booster pump, closing all valves, and cutting off the power supply.
Example 2
As shown in FIG. 1, the internal monitoring device for a polyester reactor of this example was basically the same in structure as the internal monitoring device for a polyester reactor of example 1 except that the internal monitoring device for a polyester reactor of this example was installed and used in a polycondensation reactor in a polymerization reaction.
Firstly, under the normal operation state of polyester polymerization, switching on a power supply of a display; then, the internal operation condition of the polycondensation reactor is monitored by using the internal monitoring device of the polyester reactor, and the monitoring method comprises the following steps:
1) Before monitoring the reaction condition of materials in the polyester reactor, ensuring the stable operation of the polyester polymerization reaction and having enough reflux polyol;
2) After the power supply of the display 6 is turned on, the flow control valves c and d of the polyol outlet of the condenser 8 are opened, the control valve b of the cooling water outlet of the condenser 8 is closed, and the stop valve a of the cooling water inlet of the condenser 8 is opened;
3) According to the visual condition (visibility) of the glass outer cover monitored by the camera, starting a booster pump, enabling reflux polyol to enter a polyol cooling device, namely a condenser, from a polyol inlet, and then entering a polyol spraying device through a flow control valve after exiting from a polyol outlet of the condenser, and spraying and flushing the outer surface of the glass outer cover at the camera;
4) According to the temperature of the silicone oil detected by temperature detection equipment in the camera, controlling cooling water of a polyol cooling device (namely a condenser 8); when the temperature of the silicone oil exceeds the upper limit, the temperature automatic control system automatically opens a control valve b of a cooling water outlet of the condenser 8 (a stop valve a of a cooling water inlet of the condenser 8 is always opened), and is communicated with cooling water to cool the polyol, namely, the temperature of a polyol outlet of a polyol cooling device (condenser) is reduced, and meanwhile, the silicone oil in the glass outer cover is sprayed and cooled through a polyol spraying device, so that the temperature of the silicone oil in the glass outer cover is controlled; and the opening degree of the flow control valve is automatically controlled by the flow automatic control system, namely the flow of the polyol entering the spray is automatically controlled.
5) When leakage occurs at the flange cover plate, the flange cover plate is opened under the condition of ensuring safety, the camera is removed, the blind plate is replaced, and the polyester production is ensured to be stable;
6) After the polyester production is finished, continuously operating the booster pump for a period of time, cleaning the surface of the glass outer cover, then closing the booster pump, closing all valves, and cutting off the power supply.
Claims (10)
1. A monitoring method for monitoring the internal operation of a polyester reactor, comprising the steps of:
1) Before monitoring the reaction condition of materials in the polyester reactor, ensuring the stable operation of the polyester polymerization reaction and having enough reflux polyol;
2) After the power supply of the display is connected, a flow control valve of a polyol outlet of the condenser is opened, a control valve of a cooling water outlet of the condenser is closed, and a stop valve of a cooling water inlet of the condenser is opened;
3) Starting a booster pump according to the visual condition of the glass outer cover monitored by the camera, enabling the reflux polyol to enter a polyol cooling device, namely a condenser, from a polyol inlet, and then entering a polyol spraying device through a flow control valve after exiting from a polyol outlet of the condenser, and spraying and flushing the outer surface of the glass outer cover at the camera;
4) According to the temperature of the silicone oil detected by temperature detection equipment in the camera, controlling cooling water of a polyol cooling device, namely a condenser; when the temperature of the silicone oil exceeds the upper limit, the temperature automatic control system automatically opens a control valve of a cooling water outlet of the condenser, a stop valve of a cooling water inlet of the condenser is always opened, cooling water is communicated, polyol is cooled, namely the temperature of a polyol outlet of the condenser is reduced, and meanwhile, the silicone oil in the glass outer cover is sprayed and cooled through a polyol spraying device, so that the temperature of the silicone oil in the glass outer cover is controlled; and the opening degree of the flow control valve is automatically controlled by the flow automatic control system, namely the flow of the polyol entering the spray is automatically controlled.
2. The monitoring method according to claim 1, further comprising the steps of: 5) When leakage occurs at the flange cover plate, the flange cover plate is opened under the condition of ensuring safety, the camera is removed, the blind plate is replaced, and the polyester production is ensured to be stable.
3. The monitoring method according to claim 1, further comprising the steps of: 6) After the polyester production is finished, continuously operating the booster pump for a period of time, cleaning the surface of the glass outer cover, then closing the booster pump, closing all valves, and cutting off the power supply.
4. The monitoring method according to claim 1, further comprising the steps of: in the step 1), the opening degree of the flow control valve is automatically controlled through a flow automatic control system, namely the flow of the polyol entering the spray is automatically controlled, and meanwhile, the mole ratio of the acid to the alcohol in the esterification polymerization reaction is ensured to be kept in a controllable range.
5. The monitoring method according to claim 1, wherein:
the internal monitoring device of the polyester reactor applied to the monitoring method is arranged on the wall of the polyester reactor for use and comprises: the device comprises a glass outer cover, a camera, a polyol cooling device, namely a condenser, a polyol spraying device, a cable sheath, a display, a booster pump, a flange cover plate, an automatic temperature control system and an automatic flow control system; the flange cover plate is arranged at the bottom end of the glass outer cover, and an opening at the bottom end of the glass outer cover is sealed; the glass outer cover is internally filled with silicone oil; the flange cover plate and the glass outer cover are fixedly connected with the wall of the polyester reactor; the flange cover plate is provided with an opening, and a cable sheath is inserted into the opening; a plurality of cameras are arranged in the glass outer cover; a temperature detection device is arranged inside the camera; the display is arranged outside the polyester reactor and is connected with the automatic temperature control system and the automatic flow control system; the temperature detection equipment in the camera is connected with the input end of the temperature automatic control system; a cable connected with the temperature automatic control system by the temperature detection equipment in the camera is positioned in the cable sheath; the spray head of the polyol spray device is arranged outside the glass outer cover at the camera and can be aligned to the outer surface of the glass outer cover at the camera for spraying; the condenser is provided with a polyol inlet, a polyol outlet, a cooling water inlet and a cooling water outlet; the tail part of the polyol spraying device is connected with a polyol outlet of the condenser through a flow control valve; the flow control valve is connected with the output end of the flow automatic control system; the reflux polyol outlet of the condenser is provided with a flow transmitter which is connected with the input end of the flow automatic control system; a cooling water inlet of the condenser is provided with a stop valve, and a cooling water outlet of the condenser is provided with a temperature control valve; the temperature control valve is connected with the output end of the temperature automatic control system; when the camera monitors that the visual condition, namely the visibility, of the glass outer cover reaches the low limit, a booster pump is started, and reflux polyol enters a polyol cooling device, namely a condenser, from a polyol inlet, then enters a polyol spraying device through a flow control valve after exiting from a polyol outlet of the condenser, and is sprayed and washed against the outer surface of the glass outer cover at the camera; when the temperature detection equipment in the camera detects that the temperature of the silicone oil in the glass outer cover exceeds the upper limit, the temperature control valve of the cooling water outlet of the condenser is automatically controlled by the temperature automatic control system to be opened, the stop valve of the cooling water inlet of the condenser is always opened and communicated with cooling water, the temperature of the polyol outlet of the condenser is reduced, namely the polyol is cooled, and the silicone oil in the glass outer cover is sprayed and cooled through the polyol spraying device, so that the temperature of the silicone oil in the glass outer cover is controlled; meanwhile, the opening degree of the flow control valve is automatically controlled through the flow automatic control system, namely the flow of the polyol entering the spray is automatically controlled.
6. The monitoring method according to claim 5, wherein:
the camera is interlocked with a motor of the booster pump; when the camera monitors that the visual condition of the glass outer cover reaches the low limit, the linkage system automatically starts the booster pump, and the reflux polyol enters the polyol cooling device, namely the condenser, from the polyol inlet.
7. The monitoring method according to claim 5, wherein:
the cross section of the glass outer cover is U-shaped, and the bottom edge of the bottom end of the glass outer cover is turned outwards; the outward turned bottom edge of the glass outer cover is inserted between the flange cover plate and the wall of the polyester reactor; the flange cover plate is fixedly connected with the wall of the polyester reactor through bolts.
8. The monitoring method according to claim 5, wherein:
the camera is a high-definition high-temperature-resistant camera; the glass outer cover is a high-strength glass outer cover; the polyester reactor is an esterification reactor and/or a polycondensation reactor.
9. The monitoring method according to claim 5, wherein:
the polyol spraying device is provided with two sets; the spray heads of the two sets of polyol spray devices are respectively arranged at two sides of the outer glass cover at the camera; the tail parts of the two sets of polyol spraying devices are respectively connected with the polyol outlets of the condenser through flow control valves c and d.
10. The monitoring method according to claim 5, wherein:
the outside of the inside monitoring device of polyester reactor is provided with a blind plate, and when leakage occurs at the flange cover plate, the blind plate can be used for replacing the flange cover plate to isolate materials in time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910983475.XA CN111111574B (en) | 2019-10-16 | 2019-10-16 | Monitoring device and monitoring method for polyester reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910983475.XA CN111111574B (en) | 2019-10-16 | 2019-10-16 | Monitoring device and monitoring method for polyester reactor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111111574A CN111111574A (en) | 2020-05-08 |
| CN111111574B true CN111111574B (en) | 2024-03-19 |
Family
ID=70495333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910983475.XA Active CN111111574B (en) | 2019-10-16 | 2019-10-16 | Monitoring device and monitoring method for polyester reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111111574B (en) |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10137748A (en) * | 1996-11-09 | 1998-05-26 | Tohoku Unicom:Kk | Equipment for detoxifying organochlorine toxic substance |
| JP2000075400A (en) * | 1998-08-28 | 2000-03-14 | Nikko Co Ltd | Camera apparatus for monitoring mixer |
| CN2876834Y (en) * | 2005-10-12 | 2007-03-07 | 常州裕华电子设备制造有限公司 | Explosion-isolation camera apparatus |
| CN203663820U (en) * | 2014-01-02 | 2014-06-25 | 北京宝沃石油技术有限责任公司 | Visual reaction kettle |
| CN204669498U (en) * | 2015-06-25 | 2015-09-23 | 马秋平 | A kind of boat-carrying automatically cleaning camera head |
| CN205850846U (en) * | 2016-07-31 | 2017-01-04 | 常州工程职业技术学院 | Tank reactor electronics visor |
| CN207266138U (en) * | 2017-08-28 | 2018-04-20 | 南通感创电子科技有限公司 | A kind of antifouling camera lens of corridor monitoring |
| WO2019104606A1 (en) * | 2017-11-30 | 2019-06-06 | 惠州市永明丰实业有限公司 | Device and process method for preparing water-emulsified alkyd resin |
| CN110131530A (en) * | 2019-05-17 | 2019-08-16 | 嘉兴俏奇兔贸易有限公司 | A kind of monitoring camera |
| CN210488278U (en) * | 2019-10-16 | 2020-05-08 | 江苏苏美达成套设备工程有限公司 | Inside monitoring device of polyester reactor |
-
2019
- 2019-10-16 CN CN201910983475.XA patent/CN111111574B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10137748A (en) * | 1996-11-09 | 1998-05-26 | Tohoku Unicom:Kk | Equipment for detoxifying organochlorine toxic substance |
| JP2000075400A (en) * | 1998-08-28 | 2000-03-14 | Nikko Co Ltd | Camera apparatus for monitoring mixer |
| CN2876834Y (en) * | 2005-10-12 | 2007-03-07 | 常州裕华电子设备制造有限公司 | Explosion-isolation camera apparatus |
| CN203663820U (en) * | 2014-01-02 | 2014-06-25 | 北京宝沃石油技术有限责任公司 | Visual reaction kettle |
| CN204669498U (en) * | 2015-06-25 | 2015-09-23 | 马秋平 | A kind of boat-carrying automatically cleaning camera head |
| CN205850846U (en) * | 2016-07-31 | 2017-01-04 | 常州工程职业技术学院 | Tank reactor electronics visor |
| CN207266138U (en) * | 2017-08-28 | 2018-04-20 | 南通感创电子科技有限公司 | A kind of antifouling camera lens of corridor monitoring |
| WO2019104606A1 (en) * | 2017-11-30 | 2019-06-06 | 惠州市永明丰实业有限公司 | Device and process method for preparing water-emulsified alkyd resin |
| CN110131530A (en) * | 2019-05-17 | 2019-08-16 | 嘉兴俏奇兔贸易有限公司 | A kind of monitoring camera |
| CN210488278U (en) * | 2019-10-16 | 2020-05-08 | 江苏苏美达成套设备工程有限公司 | Inside monitoring device of polyester reactor |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111111574A (en) | 2020-05-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN210488278U (en) | Inside monitoring device of polyester reactor | |
| CN111111574B (en) | Monitoring device and monitoring method for polyester reactor | |
| DE69817726T2 (en) | METHOD FOR THE CONTINUOUS PRODUCTION OF POLYESTERS | |
| CN105658319A (en) | Hydrolysis vessel used in a process for amidification of acetone cyanohydrin | |
| KR101612159B1 (en) | Apparatus and method for continuous solid state polymerization | |
| CN107567470B (en) | Continuous process for preparing polybutylene terephthalate using purified terephthalic acid and 1, 4-butanediol | |
| KR20070090225A (en) | Polyester resin, molded object thereof, and processes for producing these | |
| CN101092506A (en) | Nano composite material of copolyester, and preparation method | |
| CN106633018B (en) | Polyester polyol continuous production processes and device | |
| CN102229702A (en) | Production method of complete biodegradable aliphatic polyester | |
| TW557308B (en) | Production process and production system of aromatic polycarbonate | |
| CN101547971A (en) | Resin composition and use thereof | |
| CN100424113C (en) | Polybutylene terephthalate | |
| KR101657271B1 (en) | Apparatus and method for continuous solid state polymerization | |
| CN102516062B (en) | Hydrolysis outer circulation heat exchange process and device for friedel-crafts reaction liquid for synthesis of ibuprofen | |
| JP2010534276A (en) | Method for producing poly (trimethylene terephthalate) | |
| CN102516515B (en) | Cellular jacket type final polymerization kettle | |
| CN212982883U (en) | Waste plastic treatment equipment | |
| CN213643139U (en) | Crude ethylene glycol refining plant for industrial production | |
| CN115433347B (en) | Preparation method and equipment of polyethylene terephthalate modified material | |
| CN210103806U (en) | Polybutylene terephthalate polymerization device | |
| CN107556730A (en) | A kind of macromolecule radioresistance environmental protection polyester material and preparation method thereof | |
| RU2357977C2 (en) | Polyester resin, moulded product and production process | |
| CN111500305A (en) | Waste plastic treatment equipment | |
| CN219024262U (en) | Production system of multielement copolymerization PETG |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |