CN206201416U - A kind of comprehensive cooling Negative Pressure Batch hydrojet self-cleaning chiller system - Google Patents

Abstract

The utility model is related to a kind of comprehensive cooling Negative Pressure Batch hydrojet self-cleaning chiller system, including cooler, filter, liquid level box and pump；The discharging tube of the cooler is connected by the first magnetic valve with filter, the filter is connected by the second magnetic valve with liquid level box, the liquid level box is connected by pumping into magnetic valve with the import of pump, and the outlet of the pump passes sequentially through hydrojet magnetic valve and hydrojet flow control valve is connected with the mouth spray in flange end cap.The utility model can keep cooler cooling work face relatively clean, cooling performance relative constancy, with self-cleaning function, reduce manual labor amount.

Description

A kind of comprehensive cooling Negative Pressure Batch hydrojet self-cleaning chiller system

Technical field

The utility model is related to film line, particularly a kind of comprehensive cooling Negative Pressure Batch hydrojet self-cleaning cooler System.

Background technology

At present, the known auxiliary extruder vacuum system of PET film production line is by vacuum (-tight) housing, cooler, filter, Roots Blower fan, oil water separator, screw pump, connecting tube and solenoid valve block into.It is right in the operating temperature of 270 DEG C of auxiliary extruder system Evaporated in the melt and dissolved material of phthalic acid ethylene glycol fat, the mixed gas with small molecule and vapor as Main Ingredients and Appearance, by vacuum The vacuum (-tight) housing of system is actively incubated connecting tube to 250 DEG C through electrical heating, is cooled down into cooler, the mixed air after cooling The connecting tube and magnetic valve that body is incubated through the active of electrical heating to 180 DEG C again enter filter, and filter flow channel cross-section product is prominent So increase, reduced velocity flow, filter mixes gas natural cooling without Insulation, and temperature further declines, in mixed gas Small molecule is condensed into tiny free state dust, and filters off in the filter, and remaining Main Ingredients and Appearance is the gaseous mixture of vapor Body is connected by connecting tube and magnetic valve with roots blower, and vacuumizing power by roots blower offer one-level is aspirated, gas warp Water-cooling type oil separator oil-water separation, then through screw pump provide two grades vacuumize power isolated at suction profit after discharge.Vacuum The pressure of system is absolute pressure 5mbar, and about 0.005 atmospheric pressure, i.e., -0.995 vacuum of atmospheric pressure is come with this Impurity in the melt and dissolved material of auxiliary extruder is removed, is ensured for production line downstream process provides reliable production.

The design structure and operation principle of wherein cooler be：Cooler is cooled down with inside center coldplate, and is shunted Gas, changes the flow direction of gas, and circular outer wall is the active insulation that electricity consumption is heated to 180 DEG C.Top is flange connection Round end cap is sealed, and has cooling water inlet/outlet pipe to couple on end cap, and is connected with the inside center coldplate of cooler, inseparable From.Bottom is the liquid collecting bucket of flange connection, and discharging tube and connection valve are arranged at liquid collecting bucket bottom, and the gas flow section of cooler is narrow Narrow, the gas flow section with turnover cooler connecting tube is suitable, and very fast gas flow rate is formed with this.Mixed gas are entering cold But device cool down when, water vapor condensation Cheng Shui 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 and magnetic valve being incubated through the active of electrical heating to 220 DEG C enters 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 evaporated, this cause mixed gas composition be not only small molecule and Vapor, also a small amount of macromolecular.When mixed gas containing gasification macromolecular enter cooler, gaseous macromolecular solidification Zero point is high, and in the cooler by 180 DEG C, rapid condensation is into solid.Because gas flow rate is fast, circular outer wall is electricity Heating is actively incubated, small with the mixed gas temperature difference, therefore, coldplate contact in molecule Shi centers is frozen into solid, from level to level Condensation attachment cooler inwall, constantly reduces cooling effect of cooler, until blocking cooler.Contact solidification attachment from level to level Dirt, close structure, quality are solid.Blocked cooler changes the flow regime of mixing gas and cooler is lost work Make function, until blocking cooler gas runner.Prevent vacuum system from working, influence production run.

For the production of production line downstream process provides reliable guarantee, often to stop production line and clear up what is blocked by contamination by machine maintenance Inside cooler, because top end cover is connected with the inside center coldplate of cooler, structure bulky is not easy to remove.Use Cucurbit suspender is pulled out, but has close structure, big adhesive force pollutant contact solidification attachment, can also be difficult to pull out.Therefore from cold But dismounting cleaning cooler in plate top is time-consuming, laborious.So, machine maintenance typically in cleaning, can only pull down the cooler collection of heaviness Liquid bucket, is cleared up from bottom.The cooler bottom terrain clearance for pulling down cooler liquid collecting bucket is small, is shorter than the long and narrow gas of cooler Runner, therefore when being cleared up with simple tools such as round steel, it is impossible to it is cleaned to the long and narrow gas flow top of cooler.Machine repair personnel Thin round steel or thin band iron can only be used, the simple tool that can be bent by force with hand increases cleaning length, cleaning is reached cooler Long and narrow gas flow top.But to smash the solid dirt of close structure, quality to pieces with these intensity differences, having many bends or curves simple tool Dye thing, 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 bottom terrain clearance for pulling down cooler liquid collecting bucket is small, machine repair personnel cannot direct mesh in cleaning Depending on observation, flashlight from the cooler irradiated for pulling down cooler liquid collecting bucket can only be used, from the porch that cooler is opened During observation torch light irradiation, light leak situation when by gas flow judges the degree of cooler cleaning, therefore, cooler The degree of cleaning out cannot be grasped directly.So after machine maintenance cleaning cooler, the long and narrow gas flow of cooler is nor clean , simply 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 insulation is collided with each other with the refrigerating function of cooler, wastes 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 a production line has four Cooler.When cooler is cleared up in daily machine maintenance, four coolers can all have different degrees of blocking, therefore, four coolers Need to clear up simultaneously.Time-consuming, laborious during cleaning cooler, a machine repair personnel clears up a cooler needs 2-3 hours, even if Four machine repair personnels, four coolers are cleared up and are also sought after 2-3 hours simultaneously, could clear up completion.Clear up the cold of vacuum system But device must stop to give birth to line, and PET production line day shifts only have four machine repair personnels, and the machine maintenance human resources of occupancy are more and clearance time It is long, increase downtime, have impact on production efficiency.

Utility model content

Regarding to the issue above, the technical problems to be solved in the utility model is to provide a kind of comprehensive cooling Negative Pressure Batch Hydrojet self-cleaning chiller system, improves existing cooler construction, and coordinates negative pressure cleaning system, using comprehensive cooling, Interval hydrojet cleans the mode of self-cleaning, without manual cleaning, lifts cooling effect, improve production efficiency.

For this utility model is adopted the following technical scheme that：

A kind of comprehensive cooling Negative Pressure Batch hydrojet self-cleaning chiller system, including cooler, filter, liquid level box with And pump；The cooler includes cooler body, the flange end cap of cooler body upper end is connected to by flange, and pass through Flange is connected to the liquid collecting bucket of cooler body lower end；The cooler body is the double-deck cylinder being made up of internal layer and outer layer Body, is provided with cavity in cooler body；Gap between the internal layer and outer layer constitutes cooling water jecket, and in cooler body Outer layer on be respectively equipped with the first cooling water inlet and the first coolant outlet connected with cooling water jecket, the cooler master The mixed gas entrance and mixed gas outlet of connection cooler body internal cavity, the cooler master are additionally provided with the outer layer of body The center of body is provided with coldplate, and cooling water flow conduits are provided with the coldplate；The upper end of the cooler body internal cavity is provided with At least two shower nozzles；The second cooling water inlet and the second cooling connected with cooling water flow conduits are correspondingly provided with the flange end cap Water out and the mouth spray connected with shower nozzle；The liquid collecting bucket lower end is provided with discharging tube；

The discharging tube is connected by the first magnetic valve with filter, and the filter passes through the second magnetic valve and liquid level box Connection, the liquid level box is connected by pumping into magnetic valve with the import of pump, the outlet of the pump pass sequentially through hydrojet magnetic valve with Hydrojet flow control valve is connected with the mouth spray in flange end cap.

Further, the flange end cap top is provided with suspension ring.

Further, the filter is provided with release ball valve and Blowoff ball valve.

Further, the liquid level box is provided with by liquid electromagnetic valve.

The beneficial effects of the utility model are：Cooler is improved to the utility model the knot of bilayer zone cooling water jecket Structure, cooling work area is increased using comprehensive cooling work face, cooling performance is improved, outside removal cooler circular body Active electrical heat tracing, energy saving.Increase the shower nozzle that self-cleaning is cleaned for interval hydrojet simultaneously, coordinate negative pressure cleaning system Filter, pump and liquid level box, can comprehensive holding cooler inside it is clean, so as to keep cooling performance relative constancy.Enter one Step, it is ensured that cooler has self-cleaning function, reduces the artificial cleaning amount of labour, improves whole PET film production line auxiliary The production efficiency of extruder vacuum system.

Brief description of the drawings

Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings, wherein：

Fig. 1 is the fundamental diagram of the auxiliary extruder vacuum system of PET film where the utility model；

Fig. 2 is the broken section structural map of existing cooler；

Fig. 3 is the broken section structural map of cooler of the present utility model；

Fig. 4 is the top view of the flange end cap of cooler of the present utility model；

Fig. 5 is total system flow chart of the present utility model.

Specific embodiment

The fundamental diagram of the auxiliary extruder vacuum system of existing PET film shown in reference picture 1, the course of work is as follows： In 270 DEG C of operating temperature, evaporated in the melt and dissolved material of terephthalate fat, with small molecule and vapor as it is main into Part mixed gas be actively incubated connecting tube to 160 DEG C through electrical heating by vacuum (-tight) housing 1, vacuum (-tight) housing 2 102, into cooling Device 1, cooler 2 104 are cooled down, the connection that the mixing gas after cooling is incubated through the active of electrical heating to 120 DEG C again Pipe and magnetic valve 121 and magnetic valve 120 respectively enter filter 1, filter 2 106, and filter flow channel cross-section product is prominent So increase, reduced velocity flow, filter mixes gas natural cooling without Insulation, and temperature further declines, in mixed gas Small molecule is condensed into tiny free state dust, and filters off in the filter, and remaining Main Ingredients and Appearance is the gaseous mixture of vapor Body is connected by connecting tube and magnetic valve 123, magnetic valve 124, magnetic valve 125 with roots blower 107, and one is provided by roots blower Level vacuumizes power and is aspirated, the water cooled oil-water separation of formula oil water separator 108 of gas, then provides two grades through screw pump 109 Power suction is vacuumized, then by the oil-water separation of oil water separator 110, is discharged through muffler 111, exhaust blow-down pipe 112.Vacuum system The pressure of system is absolute pressure 5mbar, and about 0.005 atmospheric pressure, i.e., -0.995 vacuum of atmospheric pressure is removed with this Remove impurity in the melt and dissolved material of auxiliary extruder.

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 evaporated, this cause mixed gas composition be not only small molecule and Vapor, also a small amount of macromolecular.

Existing cooler construction shown in reference picture 2, including cooler body 204, the upper flanges of cooler body 204 204 and flange end cap 202 connected by bolt 211, have suspension ring 201 in flange end cap 202, the outside of cooler body 204 is arranged There is electrical heat tracing layer 216, and be provided with mixed gas entrance 212, mixed gas outlet 207, in the middle of the inner chamber of cooler body 204 It is coolant flow channel 206 to set in coldplate 205, coldplate 205, and coolant flow channel 206 is circulated with the coolant in flange end cap 202 Import, outlet；The lower end of cooler body 204 by flange 208 connect liquid collecting bucket 213, the lower end of liquid collecting bucket 213 again by Flange 209 is sealed, and sets discharging tube 210.

In the course of work, when entering cooler by the mixed gas containing gasification macromolecular, gaseous macromolecular solidification Zero point is high, and in the cooler by 160 DEG C, rapid condensation is into solid.Because gas flow rate is fast, and due to flange connection The cooler body 204 for connecing is that have electrical heat tracing layer 216 to be actively incubated, small with the mixed gas temperature difference, therefore, molecule is cold The contact of Que Qi centers coldplate 205 is frozen into solid, condensation attachment cooler inwall from level to level, blocks cooler.From level to level Contact solidification attachment dirt, close structure, quality are solid.Blocked cooler changes the flow regime of mixing gas simultaneously Cooler is set to lose the job function, until blocking cooler gas runner.Prevent vacuum system from working, influence production run.

For the production of production line downstream process provides reliable guarantee, often to stop production line and clear up what is blocked by contamination by machine maintenance Inside cooler, because top flange end cap 202 is connected with the inside center coldplate 205 of cooler, structure bulky is not readily removable Unload.Had using hoist and pulled out, but have close structure, big adhesive force pollutant contact solidification attachment can also be difficult to pull out. Therefore it is time-consuming, laborious from the dismounting cleaning cooler of cooler top flange end cap 202.So, machine maintenance, can only typically in cleaning The cooler liquid collecting bucket 213 of heaviness is pulled down, is cleared up from bottom.The cooler bottom for pulling down cooler liquid collecting bucket 213 is liftoff It is highly small, the long and narrow gas flow of cooler is shorter than, therefore when being cleared up with simple tools such as round steel, it is impossible to it is cleaned to cooler Long and narrow gas flow top.Machine repair personnel can only use thin round steel or thin band iron, and the simple tool that can be bent by force with hand increases clear Reason length, enables cleaning to reach the long and narrow gas flow top of cooler.But will with these intensity differences, having many bends or curves simple tool Smash the solid pollutant of close structure, quality to pieces, the long and narrow gas flow of the clean cooler of thorough cleaning is highly difficult, therefore machine The speed of repairing cleaning cooler is slow, efficiency is very low.Again because pulling down the cooler bottom terrain clearance of cooler liquid collecting bucket 213 Small, machine repair personnel directly cannot visually observe in cleaning, can only use flashlight from the cooler for pulling down cooler liquid collecting bucket 213 Irradiated, when observing torch light irradiation from the mixed gas entrance 212 that cooler is opened, when by gas flow Light leak situation come judge cooler cleaning degree, therefore, cooler is cleaned out degree and cannot directly be grasped.So in machine maintenance After cleaning cooler, nor clean, simply gas flow is unimpeded for the long and narrow gas flow of cooler.Such cooler exists During cleaning, appear its design defect, lack effective cleaning, observation working space.The speed of clearing up cooler is slow, efficiency It is low, pay off unclean.PET production lines have two auxiliary extruders, and every auxiliary extruder has a set of pumped vacuum systems, and often set is taken out true Empty set system has two sets of cooling systems again, and a production line has four coolers.When cooler is cleared up in daily machine maintenance, four coolings Device can all have different degrees of blocking, therefore, four coolers need to be cleared up simultaneously.It is time-consuming, laborious during cleaning cooler, one Machine repair personnel clears up a cooler needs 2-3 hours, even if four machine repair personnels, four coolers are cleared up also be sought after simultaneously 2-3 hours, completion could be cleared up.The cooler for clearing up vacuum system must stop to give birth to line, and PET production line day shifts only have four machines Personnel are repaiied, the machine maintenance human resources of occupancy are more and clearance time is long, increase downtime, influence production efficiency.

Cooler construction of the present utility model shown in reference picture 3 and Fig. 4, including cooler body 303, by flange and Bolt 311 is connected to the flange end cap 302 of the upper end of cooler body 303, suspension ring 301 is housed, by flange in flange end cap 302 308 liquid collecting buckets 313 for being connected to the lower end of cooler body 303, the lower end of liquid collecting bucket 313 is sealed by flange 309, and sets discharge opeing Pipe 310.

The cooler body 303 is the double cylinder being made up of internal layer 319 and outer layer 316, in cooler body 303 It is cavity；Gap between the internal layer 319 and outer layer 316 constitutes cooling water jecket 304, and in the outer of cooler body 303 The first cooling water inlet 321 and the first coolant outlet 322 connected with cooling water jecket 304 are respectively equipped with layer 316, are cooled down Water leg 304 instead of original electrical heat tracing layer 216, and comprehensive cooling lifts cooling effect.

The mixed gas that the connection internal cavity of cooler body 303 is additionally provided with the outer layer 316 of the cooler body 303 enter Mouth 312 and mixed gas outlet 307.The center of the cooler body 303 is provided with coldplate 305, the coldplate 305 and sets There are cooling water flow conduits 306.

The upper end of the internal cavity of the cooler body 303 is provided with two shower nozzles 333,334, and shower nozzle 333,334 is connected respectively Sparge pipe 331,332.Shown in reference picture 4, the second cooling water connected with cooling water flow conduits 306 is provided with flange end cap 302 The coolant outlet 315 of import 314 and second and the mouth spray 317,318 connected with sparge pipe 331,332（In the present embodiment By taking two mouth sprays as an example, practice can increase and decrease as needed）.

Of the present utility model a kind of comprehensive cooling Negative Pressure Batch hydrojet self-cleaning chiller system shown in reference picture 5, Including cooler 401, filter 402, liquid level box 403 and pump 404.

The cooler discharging tube 310 is connected by the first magnetic valve 411 with filter 402, and the filter 402 passes through Second magnetic valve 412 is connected with liquid level box 403, and the liquid level box 403 is connected by pumping into magnetic valve 414 with the import of pump 404, The outlet of the pump 404 passes sequentially through hydrojet magnetic valve 415 and hydrojet flow control valve 421,422 is covered with flange end 302 respectively On two mouth sprays 317,318 connect.

The filter 402 is provided with release ball valve 431 and Blowoff ball valve 432, and the liquid level box 403 is provided with by liquid electricity Magnet valve 413 and liquid level gauge 405；Cooling water inlet 314 in the flange end cap 302 of cooler 401 connects cooling by ball valve 416 Water water inlet pipe.

Utility model works process is as follows：

Negative Pressure Batch hydrojet is cleared up：When PET film production line stop, auxiliary extruder vacuum system need not reach negative pressure During power operating mode standard, hydrojet cleaning is carried out, hydrojet uses triethylene glycol, and triethylene glycol gasification point, will not be because of vaporizing volume up to 285 DEG C Expand and influence the auxiliary extruder vacuum system negative pressure operating mode standard of PET film production line.Hydrojet sprays from shower nozzle 333,334, Dirt, the dust rinsed on the wall of 401 inside internal layer of cooler 319, coldplate 305, and pour cooler liquid collecting bucket 313.

Will can keep vacuum system negative pressure operating mode standard, can only PET film production line stop when, auxiliary extruder vacuum system System is cleaned when need not reach negative pressure operating mode standard, in order to the manner of cleaning up for coordinating above-mentioned cooler can be smoothed out, Overall negative pressure cleaning system is needed to realize.

Dust, dirt, the cleaning fluid of cooler liquid collecting bucket 313 are fallen into by the first magnetic valve 411 into the mistake of filter 402 Filter, filtering removal dirt, dirt is discharged through Blowoff ball valve 432, and the cleaning fluid after filtering enters liquid level box through the second magnetic valve 412 403, during cleaning, pump 404 is entered through pumping into magnetic valve 414, and sparge pipe is pumped into through hydrojet magnetic valve 415, then by hydrojet flow Regulating valve 421, hydrojet flow control valve 422 enter inside shower nozzle 333,334 cleaning showers coolers 401.When hydrojet is not enough, Hydrojet can be supplemented by by liquid electromagnetic valve 413.

The above, the only preferable specific embodiment of the utility model, but the utility model protection domain is not limited to In this, any one skilled in the art in the technical scope that the utility model is disclosed, the change that can be readily occurred in Change or replace, should all cover within protection domain of the present utility model.Therefore the utility model protection domain is with claim The protection domain of book is defined.

Claims (4)

1. a kind of comprehensive cooling Negative Pressure Batch hydrojet self-cleaning chiller system, it is characterised in that including cooler, filtering Device, liquid level box and pump；The cooler includes cooler body, and the flange end of cooler body upper end is connected to by flange Lid, and the liquid collecting bucket that cooler body lower end is connected to by flange；The cooler body is to be made up of internal layer and outer layer Double cylinder, cavity is provided with cooler body；Gap composition cooling water jecket between the internal layer and outer layer, and in The first cooling water inlet and the first coolant outlet connected with cooling water jecket, institute are respectively equipped with the outer layer of cooler body State the mixed gas entrance and mixed gas outlet that connection cooler body internal cavity is additionally provided with the outer layer of cooler body, institute The center for stating cooler body is provided with coldplate, and cooling water flow conduits are provided with the coldplate；The cooler body internal cavity Upper end be provided with least two shower nozzles；The second cooling water inlet connected with cooling water flow conduits is correspondingly provided with the flange end cap The mouth spray connected with the second coolant outlet and with shower nozzle；The liquid collecting bucket lower end is provided with discharging tube；

The discharging tube is connected by the first magnetic valve with filter, and the filter is connected by the second magnetic valve with liquid level box Connect, the liquid level box is connected by pumping into magnetic valve with the import of pump, the outlet of the pump passes sequentially through hydrojet magnetic valve and spray Flow quantity regulating valve is connected with the mouth spray in flange end cap.

2. a kind of comprehensive cooling Negative Pressure Batch hydrojet self-cleaning chiller system according to claim 1, its feature exists In the flange end cap top is provided with suspension ring.

3. a kind of comprehensive cooling Negative Pressure Batch hydrojet self-cleaning chiller system according to claim 1, its feature exists In the filter is provided with release ball valve and Blowoff ball valve.

4. a kind of comprehensive cooling Negative Pressure Batch hydrojet self-cleaning chiller system according to claim 1, its feature exists In the liquid level box is provided with by liquid electromagnetic valve.