CN206281369U - Dual channel cools down Negative Pressure Batch hydrojet self-cleaning cooler - Google Patents

Abstract

The utility model is related to dual channel to cool down Negative Pressure Batch hydrojet self-cleaning cooler, including cooler body, the center of the cooler body is provided with coldplate, the both sides of the coldplate are fixed on the inwall of cooler body, the upper end of coldplate separates with flange end cap and for cavity to be divided into upper and lower pair of coolant flow channel, cooling water flow conduits are provided with the coldplate, the outer wall of the cooler body is provided with the second cooling water inlet and the second coolant outlet connected with cooling water flow conduits；The side of cooler liquid collecting bucket offers collection hole, collects hole periphery and is fixed with sealing plate, and the blind plate for matching is provided with by bolt on sealing plate, and O-ring seal is provided between blind plate and sealing plate, and the lower end of liquid collecting head is provided with discharging tube., compared with the auxiliary extruder vacuum system cooler of conventional films production line, with cooling effectiveness higher, while repair and maintenance more facilitates, cleaning work is more time saving and energy saving, reduces manpower and time cost for the utility model.

Description

Dual channel cools down Negative Pressure Batch hydrojet self-cleaning cooler

Technical field

The utility model is related to film line, particularly a kind of dual channel cooling Negative Pressure Batch hydrojet self-cleaning cooling Device.

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 dual channel cooling Negative Pressure Batch Hydrojet self-cleaning cooler, improves existing cooler construction, by the way of Negative Pressure Batch hydrojet cleaning self-cleaning, while changing Become gas cooling flow passage structure and in collection port is set up on liquid collecting bucket, lift cooling effect, it is convenient to collect the dirt for clearing up accumulation, Improve production efficiency.

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

Dual channel cools down Negative Pressure Batch hydrojet self-cleaning cooler, including cooler body, and cooling is connected to by flange The flange end cap of device main body upper end, and the liquid collecting bucket of cooler body lower end is connected to by flange；The cooler body Cavity is inside provided with, the mixed gas entrance and gaseous mixture of connection cooler body internal cavity are additionally provided with the outer wall of cooler body Body is exported, and the center of the cooler body is provided with coldplate, and the both sides of the coldplate are fixed on the inwall of cooler body On, the upper end of coldplate is separated with flange end cap and for cavity to be divided into upper and lower pair of coolant flow channel, and cooling is provided with the coldplate Water flow passage, the outer wall of the cooler body is provided with the second cooling water inlet and the second cooling water connected with cooling water flow conduits Outlet；The upper end of the cooler body internal cavity is provided with least two shower nozzles；It is correspondingly provided with the flange end cap and shower nozzle The mouth spray of connection；The side of the liquid collecting bucket offers collection hole, and collection hole periphery is fixed with sealing plate, the sealing The blind plate for matching is installed by bolt on plate, O-ring seal is provided between the blind plate and sealing plate, the liquid collecting head Lower end is provided with discharging tube.

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

The beneficial effects of the utility model are：The utility model increases for interval hydrojet cleaning self-cleaning cooler Shower nozzle, coordinate the filter of negative pressure cleaning system, pump and liquid level box, can comprehensive holding cooler inside it is clean, so as to protect Hold cooling performance relative constancy.

Simultaneously using coldplate and flange end cap separate design, upper and lower pair of coolant flow channel is formed, increased effective bosher Make area, slow down air velocity, increase air-flow cool time, increased cooling work area, improve cooling performance；In liquid collecting Collection hole is set up on bucket, is sealed and unlatching to collecting hole by sealing plate and blind plate, blind plate position is external, it is ensured that dismantles, install Blind plate has suitable operating space.Cleaning cooler, dirt falls into dirt collecting bucket, when collecting dirt, without dismantling again, installation volume Greatly, heavy dirt collecting bucket, can dismantle small volume, lightweight collection hole blind plate, pull down the bolt lock for collecting hole blind plate, unload Lower blind plate, opens and collects hole, is directly collected, and after the completion of collection, installs blind plate, fastening bolt lock.

The utility model compared with the auxiliary extruder vacuum system cooler of conventional films production line, with cooling effectiveness higher, Repair and maintenance more facilitates simultaneously, and cleaning work is more time saving and energy saving, reduces manpower and time cost.

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 main sectional view of existing cooler；

Fig. 3 is main sectional view of the present utility model；

Fig. 4 is top view of the present utility model；

Fig. 5 is the flow chart of negative pressure cleaning system where the 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.

It is cavity in the cooler body 303, electrical heat tracing layer is arranged with the outer wall of the cooler body 303 316, while being additionally provided with the mixed gas entrance 312 and mixed gas outlet 307 of the connection internal cavity of cooler body 303.

The center of the cooler body 303 is provided with coldplate 305, and the both sides of the coldplate 305 are fixed on cooler On the inwall of main body 303, the upper end of coldplate 305 separates with flange end cap 302 and for cavity to be divided into upper and lower pair of coolant flow channel, Mixed gas can be passed through by two coolant flow channels of the upper and lower of coldplate 305, increased effective cooling work area, be slowed down Air velocity, increases air-flow cool time, preferably improves cooling effect；Cooling water flow conduits are provided with the coldplate 305 306, the outer wall of the cooler body 303 is provided with the second cooling water inlet 314 and second connected with cooling water flow conduits 306 Coolant outlet 315.

The upper end of the internal cavity of the cooler body 303 is provided with two shower nozzles 321,322, and shower nozzle 321,322 is connected respectively Sparge pipe 319,320, along the straight line instillation hole slot 323,324 that the edge of coldplate 305 is set（Specifically can refer to shown in Fig. 5）.

Shown in reference picture 4, two mouth sprays 318 connected with sparge pipe 319,320 are correspondingly provided with flange end cap 302 （In the present embodiment by taking two mouth sprays as an example, practice can increase and decrease as needed）.

The side of the liquid collecting bucket 313 offers collection hole 351, and the periphery of collection hole 351 is fixed with sealing plate 353, The blind plate 352 for matching is installed by bolt on the sealing plate 353, O is provided between the blind plate 352 and sealing plate 353 Type sealing ring.Because the bottom liquid collecting bucket of cooler body can produce dirt after a long time use and be deposited on liquid collecting bucket bottom, And the pipeline that the instillation liquid and dust of liquid collecting bucket enter filter may be blocked, the new new blind plate position of this practicality is external, Ensure to dismantle, blind plate is installed has suitable operating space.Cleaning cooler, dirt falls into dirt collecting bucket, when collecting dirt, without again Big, the heavy dirt collecting bucket of dismounting, installation volume, can dismantle small volume, lightweight collection hole blind plate, pull down collection hole blind plate Bolt lock, unload blind plate, open and collect hole, be directly collected, after the completion of collection, blind plate, fastening bolt lock are installed , save substantial amounts of time and human cost.

Of the present utility model a kind of Negative Pressure Batch hydrojet self-cleaning chiller system shown in reference picture 5, including cooler 401st, 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 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 cooler body 303 of cooler 401 connects cold by ball valve 416 But 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 321,322, Dirt, the dust rinsed on the inside inner layer wall of cooler body 303 of cooler 401, coldplate 305, and pour cooler collection Liquid 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 321,322 cleaning showers coolers 401.When hydrojet is not enough, Hydrojet can be supplemented by by liquid electromagnetic valve 413.

What is remained in liquid collecting bucket 313 fails the dirt of discharge, can directly be reclaimed by collecting hole 351.

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 (2)

1. dual channel cooling Negative Pressure Batch hydrojet self-cleaning cooler, including cooler body, cooler is connected to by flange The flange end cap of main body upper end, and the liquid collecting bucket of cooler body lower end is connected to by flange；In the cooler body Cavity is provided with, the mixed gas entrance and mixed gas of connection cooler body internal cavity are additionally provided with the outer wall of cooler body Outlet, it is characterised in that the center of the cooler body is provided with coldplate, and the both sides of the coldplate are fixed on cooler master On the inwall of body, the upper end of coldplate separates with flange end cap and for cavity to be divided into upper and lower pair of coolant flow channel, in the coldplate Cooling water flow conduits are provided with, the outer wall of the cooler body is provided with the second cooling water inlet and connected with cooling water flow conduits Two coolant outlets；The upper end of the cooler body internal cavity is provided with least two shower nozzles；Correspondence sets in the flange end cap There is the mouth spray connected with shower nozzle；The side of the liquid collecting bucket offers collection hole, and collection hole periphery is fixed with sealing plate, The blind plate for matching is installed by bolt on the sealing plate, O-ring seal is provided between the blind plate and sealing plate, it is described The lower end of liquid collecting head is provided with discharging tube.

2. dual channel according to claim 1 cools down Negative Pressure Batch hydrojet self-cleaning cooler, it is characterised in that the method Blue end cap top is provided with suspension ring.