CN206201417U - A kind of negative pressure instillation wet type self-cleaning chiller system - Google Patents

Abstract

The utility model is related to a kind of negative pressure instillation wet type self-cleaning chiller system, including cooler, filter, pump and liquid level box；The discharging tube is connected by the first magnetic valve with filter, and the filter is connected by pumping into magnetic valve with the import of pump, and the outlet of the pump is connected by pumping out magnetic valve with liquid level box；The liquid level box is by connecting the inner space of magnetic valve and cooler body；The outlet of the second liquid level box is divided into two-way, leads up to overflow magnetic valve and is connected with filter, separately leads up to instillation magnetic valve and instillation flow control valve and is connected with the drip solution mouthful 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 negative pressure instillation wet type self-cleaning chiller system

Technical field

The utility model is related to film line, particularly a kind of negative pressure instillation wet type self-cleaning chiller 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 component, 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 component 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 negative pressure instillation wet type self-cleaning Chiller system, improves existing cooler construction, and coordinates negative pressure cleaning system, using negative pressure wet type self-cleaning mode, nothing Manual cleaning is needed, cooling effect, improve production efficiency is lifted.

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

A kind of Negative Pressure Batch hydrojet self-cleaning chiller system, including cooler, filter, liquid level box and pump；It is described Cooler includes cooler body, the flange end cap of cooler body upper end is connected to by flange, and connect by flange In the liquid collecting bucket of cooler body lower end；Cavity, the company of being additionally provided with the outer layer of cooler body are provided with the cooler body The mixed gas entrance and mixed gas outlet of logical cooler body internal cavity, the center of the cooler body is provided with cooling Plate, cooling water flow conduits are provided with the coldplate；The edge of the upper end edge coldplate of the cooler body internal cavity is provided with Instillation hole slot, the instillation hole slot lower end is connected with instillation guider；It is correspondingly provided with the flange end cap and is connected with instillation hole slot The second cooling water inlet and the second coolant outlet that logical drip solution mouth is connected with cooling water flow conduits；The liquid collecting bucket lower end It is provided with discharging tube；

The discharging tube is connected by the first magnetic valve with filter, and the filter is by pumping into entering for magnetic valve and pump Mouth connection, the outlet of the pump is connected by pumping out magnetic valve with liquid level box；The liquid level box is by connecting magnetic valve with cooling The inner space of device main body；The outlet of the second liquid level box is divided into two-way, leads up to overflow magnetic valve and is connected with filter, another Road is connected by instillation magnetic valve and instillation flow control valve with the drip solution mouthful 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, it is connected with fluid supplement solenoid valve by liquid pipeline on the pipeline pumped between magnetic valve and pump.

Further, the liquid level box is provided with and unloads pressure electromagnetic valve.

The beneficial effects of the utility model are：Cooler is increased the utility model the drop for negative pressure wet type self-cleaning Orifice groove and instillation guider, coordinate the filter of negative pressure cleaning system, pump and liquid level box, can be inside comprehensive holding cooler Cleaning, so as to keep cooling performance relative constancy.Further, it is ensured that cooler has self-cleaning function, reduce artificial clear The amount of labour is washed, the production efficiency of the whole auxiliary extruder vacuum system of PET film production line is improve.

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 the end view drawing of instillation hole slot；

Fig. 6 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 Point 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 component 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 heating guarantor is arranged with the outer layer 304 of the cooler body 303 Warm layer 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, the coldplate 305 and is provided with cooling water flow conduits 306.

The straight line instillation hole slot 319,320 that the edge of upper end edge coldplate 305 of the internal cavity of the cooler body 303 is set （Specifically can refer to shown in Fig. 5）, the lower end of instillation hole slot 319,320 is connected to instillation guider 321,322；Instil and be oriented to Device is used to make cleaning fluid uniformly flow through cooling work face.

Shown in reference picture 4, the drip solution mouthful connected with instillation hole slot 319,320 is correspondingly provided with flange end cap 302 317、318（In the present embodiment by taking two drip solutions mouthful as an example, practice can increase and decrease as needed）Connected with cooling water flow conduits 306 The second cooling water inlet 314 and the second coolant outlet 315.

Of the present utility model a kind of negative pressure instillation wet type self-cleaning chiller system shown in reference picture 6, including cooler 401st, filter 402, pump 403 and liquid level box 404.

The cooler discharging tube 310 is connected by the first magnetic valve 411 with filter 402, and the filter 402 passes through Pump into magnetic valve 412 to be connected with the import of pump 403, the outlet of the pump 403 connects by pumping out magnetic valve 413 with liquid level box 404 Connect；The liquid level box 404 is by connecting the inner space of magnetic valve 416 and cooler 401；The outlet of liquid level box 404 is divided into two Road, leads up to overflow magnetic valve 415 and is connected with filter 402, separately leads up to instillation magnetic valve 417 and instillation Flow-rate adjustment Valve 421,422 is connected with two drip solutions mouthful 317,318 in flange end cap 302 respectively.

The filter 402 is provided with release ball valve 431 and Blowoff ball valve 432, described to pump into magnetic valve 412 and pump 403 Between pipeline on connection with fluid supplement solenoid valve 419 by liquid pipe；The liquid level box 404 is provided with and unloads the He of pressure electromagnetic valve 414 Liquid level gauge 405.Cooling water inlet 314 in the flange end cap 302 of cooler 401 connects cooling water inlet pipe by ball valve 418.

Utility model works process is as follows：

Negative pressure wet type self-cleaning：Pass through the instillation hole of the upper end of the inside center coldplate 305 of cooler 401 in routine work Groove 323,319,320,326, with instillation guider 329,330,331,332, cools down to coldplate 305 and the wall of periphery internal layer 319 Instil liquid on the inwall of water leg 304, keeps coldplate 305, the wall of internal layer 319 moistening, instillation liquid selective triethylene glycol, triethylene glycol Gasification point will not influence the auxiliary extruder vacuum system negative pressure work of PET film production line up to 285 DEG C because vaporizing volume expands Condition standard, during using negative pressure wet type self-cleaning method, when vaporized molecules are contacted and solidified in cooler center coldplate 305, by In the dust contact of coldplate 305 and the vaporized molecules solidification of moistening, sposh shape is become, it is cold because Action of Gravity Field falls into But device liquid collecting bucket 313.

In order to the manner of cleaning up for coordinating above-mentioned cooler can be smoothed out, it is necessary to overall negative pressure clears up system to realize.

Negative pressure wet type self-cleaning：In the normal production and application of PET film production line, when the liquid collecting bucket 313 for falling into cooler Dust, dirt and instillation liquid filtered into filter 402 by the first magnetic valve 411 that discharging tube 310 is connected, go decontamination Thing, dirt is discharged by Blowoff ball valve 432, and the instillation liquid after filtering enters pump by pumping into magnetic valve 412, through pump 403 and pump Go out magnetic valve 413 and pump into liquid level box 404.

In order to keep vacuum system negative pressure operating mode standard, when pumping into, ensure respective valve is closed.Closed when pumping into The connection magnetic valve 416 of instillation magnetic valve 417, liquid level box 404 with cooler 401, cooler 401 and the first of filter 402 Magnetic valve 411, while open and pumping into magnetic valve 412, pumping out magnetic valve 413, unload pressure electromagnetic valve 414 and liquid level box 404 and filtering The overflow magnetic valve 415 of the connection of device 402.Until liquid level box 404 is expired by pump, the process that pumps into of negative pressure liquid instillation system terminates； During continuous drip, closing pumps into magnetic valve 412, pumps out magnetic valve 413, unloads pressure electromagnetic valve 414 and liquid level box 404 and filter The overflow magnetic valves 415 of 402 connections, open the first magnetic valve 411 of cooler 401 and filter 402, liquid level box 404 with it is cold But the connection magnetic valve 416 of device 401, makes liquid level box 404 keep identical negative pressure, the drip solution in liquid level box 404 with cooler 401 Body by gravity by instillation magnetic valve 417, instillation flow control valve 421,422 continuous drips on center coldplate 305.

In order to keep vacuum system negative pressure operating mode standard, when pumping into the conversion instiled, in order to reduce to vacuum System negative pressure influences, wherein unloading pressure electromagnetic valve 414, overflow magnetic valve 415, connection magnetic valve 416 is installed on liquid level box 404 most Near position, reduces the length of pipeline, it is to avoid gas enters vacuum system when pumping into the conversion instiled.

When drip solution is not enough, drip solution is supplemented by fluid supplement solenoid valve 419.

For the purposes of keeping vacuum system negative pressure operating mode standard, filtered by filter 401, remove dirt, dirt is by ball Valve 432 discharge when, carried out when should select PET film production line stop, it is necessary to when can open release ball valve 431.

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 (5)

1. a kind of negative pressure instillation wet type self-cleaning chiller system, it is characterised in that 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；Cavity is provided with the cooler body, on the outer layer of cooler body The mixed gas entrance and mixed gas outlet of connection cooler body internal cavity are additionally provided with, the center of the cooler body sets There is coldplate, cooling water flow conduits are provided with the coldplate；The edge of the upper end edge coldplate of the cooler body internal cavity Instillation hole slot is provided with, the instillation hole slot lower end is connected with instillation guider；It is correspondingly provided with the flange end cap and instillation The second cooling water inlet and the second coolant outlet that the drip solution mouth of hole slot connection is connected with cooling water flow conduits；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 pumping into magnetic valve with the import of pump Connect, the outlet of the pump is connected by pumping out magnetic valve with liquid level box；The liquid level box is by connecting magnetic valve and cooler master The inner space of body；The outlet of the second liquid level box is divided into two-way, leads up to overflow magnetic valve and is connected with filter, another a-road-through Instillation magnetic valve and instillation flow control valve is crossed to be connected with the drip solution mouthful in flange end cap.

2. a kind of negative pressure instillation wet type self-cleaning chiller system according to claim 1, it is characterised in that the flange End cap top is provided with suspension ring.

3. a kind of negative pressure instillation wet type self-cleaning chiller system according to claim 1, it is characterised in that the filtering Device is provided with release ball valve and Blowoff ball valve.

4. a kind of negative pressure instillation wet type self-cleaning chiller system according to claim 1, it is characterised in that described to pump into It is connected with fluid supplement solenoid valve by liquid pipeline on pipeline between magnetic valve and pump.

5. a kind of negative pressure instillation wet type self-cleaning chiller system according to claim 1, it is characterised in that the liquid level Case is provided with and unloads pressure electromagnetic valve.