CN108800978A - A kind of electrostatic precipitation formula lost pressure cooling device - Google Patents
A kind of electrostatic precipitation formula lost pressure cooling device Download PDFInfo
- Publication number
- CN108800978A CN108800978A CN201810733087.1A CN201810733087A CN108800978A CN 108800978 A CN108800978 A CN 108800978A CN 201810733087 A CN201810733087 A CN 201810733087A CN 108800978 A CN108800978 A CN 108800978A
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- China
- Prior art keywords
- cooler body
- cooler
- pressure
- ceramics insulator
- support ring
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28B—STEAM OR VAPOUR CONDENSERS
- F28B9/00—Auxiliary systems, arrangements, or devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F11/00—Arrangements for sealing leaky tubes and conduits
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
- F28F19/01—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers by using means for separating solid materials from heat-exchange fluids, e.g. filters
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The present invention relates to a kind of electrostatic precipitation formula lost pressure cooling devices, including cooler body, flange end cap and liquid collecting bucket；The cooler body is the double cylinder being made of internal layer and outer layer, and cavity is equipped in cooler body；Gap between the internal layer and outer layer constitutes cooling water jecket, the center of the flange end cap offers the mounting hole being connected to cooler body inside, the mounting hole is embedded in matched ceramics insulator, high-pressure electrostatic bar is vertically assigned in the center of the ceramics insulator, the shaft of the high-pressure electrostatic bar stretches into the lower part in cooler body, the top plug of high-pressure electrostatic bar stretches out ceramic insulation in vitro and is connected with power outlet, and the first O-ring seal is equipped between the ceramics insulator and cooler body；The present invention has the advantages that energy saving, drop is stifled, easy to clean, reduces workload and the maintenance time of cleaning cooler, improves production efficiency.
Description
Technical field
The present invention relates to PET film production equipment field, especially a kind of electrostatic precipitation formula lost pressure cooling device.
Background technology
Currently, the well known auxiliary extruder vacuum system of PET film production line is by vacuum (-tight) housing, cooler, filter, Roots
Wind turbine, oil water separator, screw pump, connecting tube and solenoid valve block at.It is right in the operating temperature of 270 DEG C of auxiliary extruder system
It is evaporated in the melt and dissolved material of phthalic acid ethylene glycol fat, with small molecule and vapor mixed gas as the main component, by vacuum
The vacuum (-tight) housing of system actively keeps the temperature connecting tube to 250 DEG C through electrical heating, is cooled down into cooler, mixed air after cooling
The connecting tube of the active heat preservation through electrical heating to 180 DEG C and solenoid valve enter filter to body again, and filter flow channel cross-section product is prominent
It so increases, reduced velocity flow, filter mixes gas natural cooling, temperature further declines, in mixed gas without Insulation
Small molecule is condensed into tiny free state dust, and filters off in the filter, and remaining main ingredient is the gaseous mixture of vapor
Body is connected by connecting tube and solenoid valve with roots blower, and vacuumizing power by roots blower offer level-one is aspirated, gas warp
Water-cooling type oil separator oil-water separation, then provide after two level vacuumizes power isolated at suction grease and be discharged through screw pump.Vacuum
The pressure of system is absolute pressure 5mbar, about 0.005 atmospheric pressure, i.e., the vacuum degree of -0.995 atmospheric pressure, with this
Impurity in the melt and dissolved material of auxiliary extruder is removed, providing reliable production for production line downstream process ensures.
The design structure and operation principle of wherein cooler be：Cooler is to be cooled down with inside center coldplate, and shunt
Gas, changes the flow direction of gas, and circular outer wall is the active heat preservation that electricity consumption is heated to 180 DEG C.Top is flange connection
Round end cap seals, and has the connection of cooling water inlet/outlet pipe on end cap, and be connected with the inside center coldplate of cooler, inseparable
From.Bottom is the liquid collecting bucket of flange connection, and liquid collecting bucket bottom has drain pipe and connection valve, the gas flow section of cooler narrow
It is narrow, it is suitable with the disengaging gas flow section of cooler connecting tube, very fast gas flow rate is formed with this.Mixed gas is cold in entrance
But device cool down when, vapor is condensed into water and falls into liquid collecting bucket, and small molecule is condensed into tiny free state dust, follow flow velocity compared with
Fast gas, the connecting tube of the active heat preservation through electrical heating to 220 DEG C and solenoid valve enter filter.
But under vacuum system 5mbar absolute pressures, negative pressure makes 270 DEG C in auxiliary extruder system of terephthalic acid (TPA)
Macromolecular gasification point in the melt and dissolved material of ethylene glycol fat is reduced and is evaporated, this make mixed gas composition be not only small molecule and
Vapor, also a small amount of macromolecular.When mixed gas containing gasification macromolecular enters cooler, gaseous macromolecular solidification
Zero point is high, and rapid condensation is at solid when by 180 DEG C of cooler.Since gas flow rate is fast, circular outer wall is electricity
Heating is actively kept the temperature, small with the mixed gas temperature difference, therefore, molecule be cooler the contact of circular inner wall and center coldplate it is solidifying
Gu at solid, cooler inner wall is adhered in condensation from level to level, constantly reduces cooling effect of cooler, until blocking cooler.One
The dirt of contact solidification attachment layer by layer, close structure, quality are solid.Blocked cooler changes the flowing shape for mixing gas
State simultaneously makes cooler lose the job function, until blocking cooler gas runner.Prevent vacuum system from working, influences production fortune
Row.
Reliable guarantee is provided for the production of production line downstream process, often to stop production line and blocking is stain by machine maintenance cleaning
Inside cooler, since the inside center coldplate of top end cover and cooler is connected, structure bulky is not easy to remove.Use
Cucurbit suspender pulls out, but has close structure, and big adhesive force pollutant contact solidification attachment can also be difficult to pull out.Therefore from cold
But dismounting cleaning cooler is time-consuming, laborious at the top of plate.So machine maintenance generally cleaning when, bulky cooler collection can only be removed
Liquid bucket, is cleared up from lower part.The cooler lower part terrain clearance for removing cooler liquid collecting bucket is small, shorter than the long and narrow gas of cooler
Runner, therefore when being cleared up with simple tools such as round steel, cannot be cleaned at the top of the long and narrow gas flow of cooler.Machine repair personnel
Thin round steel or thin band iron can only be used, increases cleaning length with the simple tool that hand can be bent by force, cleaning is enable to reach cooler
At the top of long and narrow gas flow.But to smash the solid dirt of close structure, quality to pieces with these intensity differences, having many bends or curves simple tool
Object is contaminated, the long and narrow gas flow of the clean cooler of thorough cleaning is highly difficult, therefore the speed of machine maintenance cleaning cooler is slow, efficiency
It is very low.Again because the cooler lower part terrain clearance for removing cooler liquid collecting bucket is small, machine repair personnel can not direct mesh in cleaning
, can only be with flashlight from the cooler irradiated for removing cooler liquid collecting bucket depending on observation, the inlet being opened from cooler
Observe hand electric lights when, by gas flow when light leakage situation come judge cooler cleaning degree, therefore, cooler
The degree of cleaning out can not be grasped directly,.So after cooler is cleared up in machine maintenance, the long and narrow gas flow of cooler is nor clean
, only gas flow is unimpeded.Such cooler has appeared its design defect in cleaning, lacks effective cleaning, sees
Examine working space.Clear up cooler speed is slow, efficiency is low, pay off unclean.The circular outer wall of cooler is that electricity consumption is heated to
120 DEG C of active heat preservation and the refrigerating function of cooler conflict with each other, and waste electric energy.PET production lines have two auxiliary extruders, often
The auxiliary extruder of platform respectively has a set of pumped vacuum systems, and often cover pumped vacuum systems has two sets of cooling systems again, and there are four a production lines
Cooler.When cooler is cleared up in daily machine maintenance, four coolers can all have different degrees of blocking, therefore, four coolers
It need to clear up simultaneously.Time-consuming, laborious when clearing up cooler, a machine repair personnel clears up a cooler and needs 2-3 hours, even if
Four machine repair personnels, four coolers are cleared up also be sought after 2-3 hours simultaneously, and completion could be cleared up.Clear up the cooling of vacuum system
Device must stop raw line, and only there are four machine repair personnels for PET production lines day shift, and the machine maintenance human resources of occupancy are more and clearance time is long,
Increase downtime, influences production efficiency.
Vacuum system provides power by roots blower, screw pump and generates vacuum, and gas enters after filter filters
Roots blower, screw pump.Filter is by strainer filtering energy power limit, though big portion's dust can be filtered, but still has superfine small dust
It is free in gas and roots blower, screw pump is sequentially entered by strainer screen together, pollute the essence of roots blower, screw pump
Close rotating mechanism often makes roots blower, screw pump because the accumulation of dust pollution generates failure.
Invention content
It is an object of the invention to overcome what the cooler of vacuum system in existing PET film production line was difficult to clear up to ask
Topic provides a kind of electrostatic precipitation formula lost pressure cooling device, reduces workload and the maintenance time of cleaning cooler, improves production effect
Rate.
To achieve the above object, present invention employs following technical schemes：
A kind of electrostatic precipitation formula lost pressure cooling device, including cooler body, by flanged joint in cooler body upper end
Flange end cap, and the liquid collecting bucket by flanged joint in cooler body lower end；The cooler body be by internal layer and
The double cylinder that outer layer is constituted, cooler body is interior to be equipped with cavity；Gap between the internal layer and outer layer constitutes cooling water
Chuck, and in being respectively equipped with the cooling water inlet and cooling water outlet being connected to cooling water jecket on the outer layer of cooler body,
The mixed gas entrance and mixed gas outlet of connection cooler body internal cavity are additionally provided on the outer layer of the cooler body,
The center of the flange end cap offers the mounting hole with cooler body connects with the internal cavities, the mounting hole be embedded in
The ceramics insulator to match, high-pressure electrostatic bar, the high pressure have vertically been assigned in the center of the ceramics insulator
The shaft of electrostatic bar stretches into the lower part in cooler body, and the top plug of high-pressure electrostatic bar stretches out ceramic insulation in vitro and connects
There is power outlet, the first O-ring seal, first O-ring seal are equipped between the ceramics insulator and cooler body
The pressure compaction generated by negative pressure in the dead weight of ceramics insulator and cooler body；It is inserted in top on the high-pressure electrostatic bar
The lower section of head is equipped with support ring, and the top of the ceramics insulator is equipped with and the matched concave surface of the support ring, the support
Ring is equipped with the second O-ring seal, second O-ring seal in concave surface between support ring and ceramics insulator
The pressure compaction generated by negative pressure in the dead weight of support ring and cooler body；The power outlet connects electricity by contactor
Source, power outlet is interior to be equipped with the resistance probe contacted with support ring；It is described to connect only when the resistance probe and support ring contact
Tentaculum is attracted.
Further, first O-ring seal and the second O-ring seal are fluororubber O-type ring.
The beneficial effects of the present invention are：The present invention can make the cooling of the auxiliary extruder vacuum system of PET film production line
The cooling work face of device keeps clean, and refrigerating function does not fluctuate, and is not take up the time effectively produced, debugging high pressure is cleared up under line
Electrostatic bar will not having time constraint, can ensure cleaning debugging high-pressure electrostatic bar quality；The offer of high-pressure electrostatic bar efficiently removes
Dirt ability and dismounting facility, the terephthalic acid (TPA) for the gasification for entering cavity by mixed gas entrance is persistently ionized by high-pressure electrostatic
Glycol molecule, when the terephthalate molecule of gasification sublimates into solid-state dust, high-pressure electrostatic in cooler ontology
Bar continues oriented attachment dust to shaft, makes the solid-state dust sublimated towards high-pressure electrostatic bar directed movement, can be to avoid to benzene
Dioctyl phthalate glycol molecule gaseous molecular adheres to the condensation working face of the inner wall of cooler ontology, makes the cooling work of cooler
Face remains clean, improves the operating mode of roots blower, screw pump, avoids roots blower, screw pump due to dust pollution
Damage；The point contact of the support ring of the resistance probe and high-pressure electrostatic bar in power outlet and power outlet and high pressure are quiet simultaneously
The contacting travel of electric pole connection constitutes sequence difference, only after the support ring point contact of resistance probe and high-pressure electrostatic bar, contactor
It could be attracted, effective safeguard protection is formed to entire electrostatic precipitation system.The cleaning of the present invention is simple, convenient, quick, reduces
Machine repair personnel clears up the workload of cooler with clearance time and because the downtime of cooler is cleared up in machine maintenance, improves production
Efficiency.
Description of the drawings
Fig. 1 is the structural schematic diagram of the present invention；
Fig. 2 is the electrical schematic diagram of the present invention；
Wherein：1- cooler bodies, 11- internal layers, 12- outer layers, 13- cavitys, 14- cooling water jeckets, 15- cooling waters into
Mouth, 16- cooling water outlets, the import of 17- mixed gas, 18- mixed gas outlets, 2- flange end caps, 21- mounting holes, 3- liquid collectings
Bucket, 4- ceramics insulators, 5- high-pressure electrostatics bar, 51- shafts, 52- plugs, 53- support rings, the first O-ring seals of 6-, 7- second
O-ring seal, 8- power outlets, 81- resistance probes, 82- plug contacts.
Specific implementation mode
The present invention will be further described below in conjunction with the accompanying drawings：
A kind of electrostatic precipitation formula lost pressure cooling device shown in referring to Fig.1, including cooler body 1, are existed by flanged joint
The flange end cap 2 of 1 upper end of cooler body, and the liquid collecting bucket 3 by flanged joint in 1 lower end of cooler body.
The cooler body 1 is the double cylinder being made of internal layer 11 and outer layer 12, and 1 is equipped with sky in cooler body
Chamber 13.
Gap between the internal layer 11 and outer layer 12 constitutes cooling water jecket 14, and in the outer layer of cooler body 1 12
On be respectively equipped with the cooling water inlet 15 being connected to cooling water jecket 14 and cooling water outlet 16, the cooler body 1 it is outer
The mixed gas entrance 17 and mixed gas outlet 18 of connection 1 internal cavity 13 of cooler body are additionally provided on layer.
The center of the flange end cap 2 offers the mounting hole 21 being connected to 1 internal cavities 13 of cooler body, the peace
Dress hole 21 is embedded in matched ceramics insulator 4, and height has vertically been assigned at the center of the ceramics insulator 4
Press electrostatic bar 5.High-pressure electrostatic bar 5 is with reference to existing structure, including shaft 51 and the plug 52 positioned at shaft top, and in shaft
It is equipped with support ring 53 in the lower section of plug 52 on 51, the top of the ceramics insulator 4 is equipped with to be matched with the support ring 53
Concave surface 41, the support ring 53 is in the concave surface, and it is O-shaped close to be equipped between support ring 53 and ceramics insulator 4 second
Seal 7.
The shaft 51 of the high-pressure electrostatic bar 5 stretches into the lower part of 1 internal cavity 13 of cooler body, 1 top of high-pressure electrostatic bar
Plug 52 to stretch out ceramics insulator 4 outer and be connected with power outlet 8, set between the ceramics insulator 4 and cooler body 1
There is the first O-ring seal 6.
High-pressure electrostatic bar 5 is persistently ionized by the gasification of the entrance cavity 13 of mixed gas entrance 17 by high-pressure electrostatic to benzene
Dioctyl phthalate glycol molecule is high when the terephthalate molecule of gasification sublimates into solid-state dust in cooler ontology 1
It presses electrostatic bar 5 to continue oriented attachment dust to shaft 51, makes the solid-state dust sublimated towards 5 directed movement of high-pressure electrostatic bar, it can
The condensation working face of the inner wall of cooler ontology 1 is adhered to avoid terephthalate molecule gaseous molecular, makes cooling
The cooling work face (14 internal layer of cooling water jecket, 11 surface) of device remains clean.
The sealing of first O-ring seal 6 and the second O-ring seal 7 uses negative pressure self sealing structure, by high-pressure electrostatic bar
5 and ceramics insulator 4 self gravitation effect and the PET film production line auxiliary extruder vacuum system residing for cooler body 1
System vacuumizes the force effect that the negative pressure to be formed generates, and the first O-ring seal 6 and the second O-ring seal 7 is compressed, to obtain
The effect of sealing.
When cleaning, due to the Electrostatic Absorption dustproof function of high-pressure electrostatic bar 5,5 table of high-pressure electrostatic bar need to be only cleared up
The attachment of face absorption.The pressure-relief valve of PET film production line vacuum system can be opened after the power-off of high-pressure electrostatic bar 5,
After removal negative pressure, high-pressure electrostatic bar 5 is directly extracted out.The high-pressure electrostatic bar 5 of dismounting is directly replaced spare, and disassembled
High-pressure electrostatic bar 5 can be debugged in offline cleaning.
Cleaning opportunity should select when the clear film lip of PET film production line is shut down, PET film production line clear film lip outage period
It is 48 hours or so, each downtime is 10-15 minutes, due to being to replace high-pressure electrostatic bar 5, ample time, no
The downtime of production line need to be occupied.
First O-ring seal 6 and the second O-ring seal 7 are all made of fluororubber O-type ring, the operating temperature of fluororubber O-type ring
Up to 240 DEG C, to meet the needs of operating temperature.
With reference to shown in Fig. 2, power supply carries out transformation by transformer and reaches required high voltage, and rectified device exports direct current
Source, then reach operating voltage through voltage-stablizer, then pass through breaker, switch, contactor, power outlet 8 and high-pressure electrostatic bar 5
Plug 52 couples, and is electrostatic precipitation power-supply.
It is equipped with the resistance probe 81 contacted with support ring 53 in the power outlet 8, resistance probe 81 and high-pressure electrostatic bar 5
The contacting travel that the point contact of support ring 53 couples with power outlet 8 and high-pressure electrostatic bar 5 constitutes sequence difference, only resistance probe
81 and high-pressure electrostatic bar 5 support ring 53 point contact after, contactor could be attracted.Resistance probe 81 and support ring 53 as a result,
Weak electric signal and the contactor coordination that generate of point contact effective safeguard protection is formed to entire electrostatic precipitation system.
Embodiment described above is only that the preferred embodiment of the present invention is described, not to the model of the present invention
It encloses and is defined, under the premise of not departing from design spirit of the present invention, technical side of the those of ordinary skill in the art to the present invention
The various modifications and improvement that case is made should all be fallen into the protection domain of claims of the present invention determination.
Claims (2)
1. a kind of electrostatic precipitation formula lost pressure cooling device, including cooler body, by flanged joint in cooler body upper end
Flange end cap, and the liquid collecting bucket by flanged joint in cooler body lower end；The cooler body is by internal layer and outside
The double cylinder that layer is constituted, cooler body is interior to be equipped with cavity；Gap between the internal layer and outer layer constitutes cooling water folder
Set, and in being respectively equipped with the cooling water inlet and cooling water outlet being connected to cooling water jecket, institute on the outer layer of cooler body
The mixed gas entrance and mixed gas outlet that connection cooler body internal cavity is additionally provided on the outer layer of cooler body are stated,
It is characterized in that：The center of the flange end cap offers the mounting hole with cooler body connects with the internal cavities, the mounting hole
It is embedded in matched ceramics insulator, high-pressure electrostatic has vertically been assigned at the center of the ceramics insulator
The shaft of bar, the high-pressure electrostatic bar stretches into the lower part in cooler body, and the top plug of high-pressure electrostatic bar stretches out ceramics absolutely
Edge is external and is connected with power outlet, is equipped with the first O-ring seal between the ceramics insulator and cooler body, and described the
The pressure compaction that one O-ring seal is generated by negative pressure in the dead weight of ceramics insulator and cooler body；The high-pressure electrostatic
It is equipped with support ring in the lower section of top plug on bar, the top of the ceramics insulator is equipped with matched recessed with the support ring
Face, the support ring are equipped with the second O-ring seal in the concave surface between support ring and ceramics insulator, and described the
The pressure compaction that two O-ring seals are generated by negative pressure in the dead weight of support ring and cooler body；The power outlet passes through
Contactor connects power supply, and the resistance probe contacted with support ring is equipped in power outlet；Only when the resistance probe and support ring
When contact, the contactor is attracted.
2. a kind of electrostatic precipitation formula lost pressure cooling device according to claim 1, it is characterised in that：The first O-shaped sealing
Circle and the second O-ring seal are fluororubber O-type ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810733087.1A CN108800978B (en) | 2018-07-05 | 2018-07-05 | Electrostatic precipitator formula negative pressure cooler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810733087.1A CN108800978B (en) | 2018-07-05 | 2018-07-05 | Electrostatic precipitator formula negative pressure cooler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108800978A true CN108800978A (en) | 2018-11-13 |
| CN108800978B CN108800978B (en) | 2020-05-15 |
Family
ID=64075305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810733087.1A Active CN108800978B (en) | 2018-07-05 | 2018-07-05 | Electrostatic precipitator formula negative pressure cooler |
Country Status (1)
| Country | Link |
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| CN (1) | CN108800978B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1264623A (en) * | 1999-02-24 | 2000-08-30 | 张延民 | Electrostatic dust collector |
| WO2006004490A1 (en) * | 2004-07-05 | 2006-01-12 | Svensk Rökgasenergi Intressenter Ab | Gas purification |
| CN104984626A (en) * | 2015-07-14 | 2015-10-21 | 河北中清环保科技有限公司 | Wood charcoal kiln smoke gas treatment system |
| CN206281370U (en) * | 2016-11-17 | 2017-06-27 | 安徽国风塑业股份有限公司 | Comprehensive dual channel cools down negative pressure instillation wet type self-cleaning cooler |
-
2018
- 2018-07-05 CN CN201810733087.1A patent/CN108800978B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1264623A (en) * | 1999-02-24 | 2000-08-30 | 张延民 | Electrostatic dust collector |
| WO2006004490A1 (en) * | 2004-07-05 | 2006-01-12 | Svensk Rökgasenergi Intressenter Ab | Gas purification |
| CN104984626A (en) * | 2015-07-14 | 2015-10-21 | 河北中清环保科技有限公司 | Wood charcoal kiln smoke gas treatment system |
| CN206281370U (en) * | 2016-11-17 | 2017-06-27 | 安徽国风塑业股份有限公司 | Comprehensive dual channel cools down negative pressure instillation wet type self-cleaning cooler |
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| Publication number | Publication date |
|---|---|
| CN108800978B (en) | 2020-05-15 |
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Address after: 230088 No.1000, Mingchuan Road, high tech Zone, Hefei City, Anhui Province Patentee after: Anhui Guofeng New Material Co.,Ltd. Address before: 230088 No.1000, Mingchuan Road, national high tech Industrial Development Zone, Hefei City, Anhui Province Patentee before: ANHUI GUOFENG PLASTIC CO.,LTD. |