CN212701870U

CN212701870U - Scraper spraying device capable of being cleaned on line

Info

Publication number: CN212701870U
Application number: CN202021079309.1U
Authority: CN
Inventors: 朱昌全; 钟明
Original assignee: Oerlikon Barmag Huitong Yangzhou Engineering Co Ltd
Current assignee: Oerlikon Barmag Huitong Yangzhou Engineering Co Ltd
Priority date: 2020-06-12
Filing date: 2020-06-12
Publication date: 2021-03-16
Anticipated expiration: 2030-06-12

Abstract

The utility model relates to a scraper blade spray set that can online cleaning, the medium outlet of the scraper blade condenser is connected with the left and right chambers of the hot well through two atmospheric legs, two rows of slag mouths at the bottom of the hot well are respectively connected with the cleaning box, two liquid phase outlets are respectively connected with the inlets of respective spray circulating pumps, the outlets of the two spray circulating pumps are respectively connected with the spray mouth of the scraper blade condenser through a circulating liquid cooler and a circulating liquid conveying pipe, and the peripheries of the two circulating liquid conveying pipes are respectively wrapped with a circulating liquid heat medium jacket; the lower ends of the two circulating liquid conveying pipes are respectively connected with a conveying pipe slag discharging valve, and the outlets of the two conveying pipe slag discharging valves are respectively connected with slag discharging branch pipes; the upper ends of the two circulating liquid conveying pipes are respectively provided with a conveying pipe emptying valve, the outlets of the two conveying pipe emptying valves are respectively connected with an emptying branch pipe, and the outlets of the slag discharging branch pipe and the emptying branch pipe are respectively connected with the inlet of the cleaning box. This but online cleaning's scraper blade spray set can realize exempting from to park and clear up the scale deposit, guarantees continuous production.

Description

Scraper spraying device capable of being cleaned on line

Technical Field

The utility model relates to a vacuum extractor of polyester reaction especially relates to a but online cleaning's scraper blade spray set, belongs to chemical industry equipment technical field.

Background

Ethylene Glycol (EG) is continuously generated in the polycondensation process in the polyester production, the ethylene glycol is easy to volatilize, and the polycondensation reaction can not be continued or even be degraded because the reaction is reversible, if the generated ethylene glycol is not removed in time. The solution is to adopt the measure of reducing the gas phase partial pressure of the ethylene glycol to ensure that the reaction is carried out under the condition of continuous vacuum pumping, however, the phenomenon that low molecular polymers are carried in the ethylene glycol is brought, and the part of the low molecular polymers flow through a vacuum device along with the ethylene glycol, so that the load of the vacuum device is increased.

In order to solve the problems, a scraper condenser, a hot well and a spray circulating pump are adopted in the prior art, the scraper condenser mainly comprises a horizontal cylinder and a vertical cylinder, the vertical cylinder is connected to the upper part of the tail end of the horizontal cylinder, a condensation spray head is arranged in an inner cavity of the vertical cylinder, the condensation spray head is connected with a spray pipe, and a scraper exhaust opening is formed in the top of the vertical cylinder; a scraper rotor is arranged in the inner cavity of the horizontal cylinder, the scraper rotor comprises a rotor shaft and a scraper connected to the rotor shaft, the scraper is matched with the inner wall of the horizontal cylinder, a scraper air inlet is arranged at the upper part of the head end of the horizontal cylinder, and a scraper medium outlet is arranged at the lower part of the tail end of the horizontal cylinder; the outlet of the scraper medium is connected with a hot well through an atmospheric leg, the liquid phase outlet of the hot well at the bottom of the hot well is connected with the inlet of a spray circulating pump, and the outlet of the spray circulating pump is connected with a spray pipe through a circulating pipe.

When the device works, the cold liquid EG sprayed out of the condensation spray head in an umbrella shape is contacted with the gaseous EG, one part of the EG can be absorbed to enable the EG to become liquid and flow downwards, meanwhile, the oligomer can be collected by the liquid EG and flows downwards into the horizontal cylinder along with the EG, a certain liquid level is kept in the horizontal cylinder, the oligomer adhered to the inner wall of the horizontal cylinder can be scraped by the scraper, finally, the oligomer and the liquid EG are discharged from a scraper medium outlet and enter a hot well through an atmosphere leg pipe and an atmosphere leg, and EG condensate is pumped out by the spraying circulating pump and returns to the vertical cylinder through the circulating pipe and the spraying pipe to be sprayed.

The above structure has the following disadvantages: oligomer large particles generated in the reaction can be filtered, some substances which cannot be filtered can be left in the whole circulating system, and can be adhered to the inner wall of the circulating pipe when the time is longer, so that the circulating pipe is scaled, and the scaling is more serious when the time is longer, so that the circulating amount of the spraying liquid is influenced, namely the spraying liquid needs to be stopped for cleaning, and the continuous production is influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the problem that exists among the prior art, provide a but online cleaning's scraper blade spray set, can realize exempting from to park and clear up the scale deposit, guarantee continuous production.

In order to solve the technical problem, the utility model discloses scraper blade spray set that can online cleaning, including scraper blade condenser, hot-well and spraying circulating pump, the hot-well includes two independent left and right rooms, the medium export of scraper blade condenser links to each other with two rooms about the hot-well through two atmospheric legs, the bottom symmetry of hot-well is equipped with two hot-well liquid phase exports and two hot-well slag discharging mouths, two the hot-well slag discharging mouths link to each other with the cleaning box respectively; the liquid phase outlets of the two hot wells are respectively connected with inlets of respective spray circulating pumps through circulating liquid filters, outlets of the two spray circulating pumps are respectively connected with a medium inlet of a circulating liquid cooler, medium outlets of the two circulating liquid coolers are respectively connected with a spray port of the scraper condenser through circulating liquid conveying pipes, the peripheries of the two circulating liquid conveying pipes are respectively coated with a circulating liquid heat medium jacket, the lower end of the circulating liquid heat medium jacket is connected with a heat medium oil supply pipe, and the upper end of the circulating liquid heat medium jacket is connected with a heat medium oil return pipe; the lower ends of the two circulating liquid conveying pipes are respectively connected with a conveying pipe slag discharging valve, and the outlets of the two conveying pipe slag discharging valves are respectively connected with slag discharging branch pipes; and the upper ends of the two circulating liquid conveying pipes are respectively provided with a conveying pipe emptying valve, the outlets of the two conveying pipe emptying valves are respectively connected with an emptying branch pipe, and the outlets of the slag discharging branch pipe and the emptying branch pipe are respectively connected with the inlet of the cleaning box.

Compared with the prior art, the utility model discloses following beneficial effect has been obtained: the scraper condenser comprises a horizontal cylinder and a vertical cylinder, the vertical cylinder is connected to the upper portion of the tail end of the horizontal cylinder, a condensation spray head is arranged in an inner cavity of the vertical cylinder and connected with a spray pipe, a scraper exhaust opening is formed in the top of the vertical cylinder, a scraper rotor is arranged in the inner cavity of the horizontal cylinder, a scraper air inlet is formed in the upper portion of the head end of the horizontal cylinder, and a scraper medium outlet is formed in the lower portion of the tail end of the horizontal cylinder. The method comprises the steps of discharging a mixture of ethylene glycol, water and oligomer from a gas phase port of a polymerization reaction kettle, allowing the mixture to enter a scraper condenser from a scraper gas inlet to spray and supplement, discharging the condensed oligomer from a medium outlet of the scraper condenser along with the ethylene glycol, allowing the condensed oligomer to enter a hot well through atmosphere legs to be filtered, allowing two atmosphere legs to be used one by one, allowing the ethylene glycol to be discharged from a liquid phase outlet of the hot well, filtering the condensed oligomer through a circulating liquid filter, conveying the condensed oligomer out through a spraying circulating pump, cooling the condensed oligomer through a circulating liquid cooler, and returning the cooled oligomer to a spraying port of the scraper condenser through a circulating liquid conveying pipe. The two circulating liquid conveying pipes are in a one-use one-standby state. When the circulating liquid conveying pipe needs to be cleaned, the spraying circulating pump and the circulating liquid conveying pipe which are switched to the standby loop operate, a conveying pipe vent valve of the cleaning loop is opened, high-temperature heat conducting oil is input into a circulating liquid heat medium jacket, the low polymer adhered to the inner wall of the circulating liquid conveying pipe is softened and falls off after being heated for a period of time, then a slag discharging valve of the cleaning loop is opened, and the fallen off substances enter a cleaning box through a slag discharging branch pipe along with ethylene glycol in the pipe to be filtered and collected, so that the on-line switching of medium circulation and the cleaning pipeline is realized, and the cleaning is avoided being stopped for cleaning.

As an improvement of the utility model, a hot well top cover is arranged at the top of the hot well, a longitudinal partition plate is arranged along the longitudinal axis of the hot well to divide the inner cavity of the hot well into a left half and a right half, a left inner chamber and a right inner chamber are symmetrically arranged at the two sides of the middle section of the longitudinal partition plate, a left outer chamber is arranged at the outer side of a transverse wallboard of the left inner chamber, a right outer chamber is arranged at the outer side of a transverse wallboard of the right inner chamber, conical hoppers are respectively arranged at the bottoms of the left inner chamber and the right inner chamber, the lowest part of the two conical hoppers is respectively connected with a hot well slag discharge port, and the two hot well slag; the bottoms of the left outer chamber and the right outer chamber are respectively provided with the hot well liquid phase outlets; the hot well top cover is spliced with two atmospheric legs, the lower ends of the two atmospheric legs are respectively inserted into the lower parts of the inner cavities of the left inner chamber and the right inner chamber, the upper part of each transverse wallboard is respectively provided with an overflow port communicated with the corresponding outer chamber, the inner port of each overflow port is respectively covered with a filter plate, the left side and the right side of each filter plate are respectively spliced in the vertical slots on the inner end surfaces of the transverse wallboards, the outer port of each overflow port is respectively covered with an outward-protruding arc-shaped filter basket, and the left side and the right side of each arc-shaped filter basket are respectively spliced in the vertical slots on the outer end surfaces of the transverse wallboards. Ethylene glycol and a little oligomer flow into the lower part of the left inner chamber through the left atmospheric leg through the valve and the pipeline at the bottom of the scraper condenser, and simultaneously play a role of liquid seal, the ethylene glycol flows out after being filtered for the first time by the filter plate, enters the inner cavity of the arc-shaped filter basket, enters the left outer chamber after being filtered for the second time by the arc-shaped filter basket, flows out from the hot well liquid phase outlet at the bottom of the left outer chamber, is pumped out by the ethylene glycol pump, and is sent to the scraper condenser for circulating spraying after being cooled. Impurities such as oligomer and the like are blocked in the left inner chamber, fall into the conical hopper and are discharged from a hot well slag discharge port. If the left atmospheric leg is blocked, the atmospheric leg on the right side can be immediately switched to work, and the hot well liquid phase outlet and the hot well slag discharge port are also switched to work on the right side, so that the spraying system can stably run for a long time, the normal running of the polymerization device is ensured, and the stopping treatment and the great loss reduction caused by the blockage of the atmospheric leg are avoided. The filter plate is for filtering for the first time, holds back great size impurity, the utility model discloses a filter plate is close to vacuum seal jar's top, is convenient for take the filter plate out cleanly, also is convenient for pack back. The convex arc filter basket not only increases the filter area, but also increases the space for containing the objects; the filter plate and the edges of the left side and the right side of the arc-shaped filter basket are embedded in the vertical slots, so that the filter plate and the arc-shaped filter basket are convenient to pull, insert, clean and assemble.

As a further improvement, the arc filter baskets extend to the lower part of the corresponding outer chamber respectively, and the arc surfaces and the bottoms of the arc filter baskets are respectively provided with a filter screen. The filtering area of the arc-shaped filtering basket is further increased, so that the arc-shaped filtering basket needs to be cleaned once after the system works for several days continuously, and the cleaning workload is reduced.

As a further improvement of the utility model, two the atmosphere leg is located respectively the both sides of longitudinal baffle, and pass respectively in the centre bore of seal receptacle, two the seal receptacle welds respectively on hot well top, is equipped with the filler in the stuffing box between atmosphere leg outer wall and the seal receptacle inner wall respectively, and the upper portion of filler is equipped with gland respectively, and gland's flange is connected with the flange of seal receptacle through the gland screw. The gland screw is tightened, and the packing is tightly pressed in the packing box through the packing gland, so that the atmosphere leg is sealed at the periphery of the atmosphere leg, vertical free sliding of the atmosphere leg can be guaranteed, and the expansion caused by system temperature change can be automatically adapted.

As a further improvement of the utility model, the position symmetry of keeping away from longitudinal baffle on the cross axis of hot well top cap is equipped with two hot well manhole covers, and every is located the entrance to a cave below of hot well manhole cover respectively to filter plate and arc filter basket. The hot well manhole cover is opened, the filter plate and the arc filter basket can be pulled out for cleaning, the filter plate and the arc filter basket are inserted back after being cleaned, and then the hot well manhole cover is reset, so that the hot well top cover is prevented from being integrally detached, and the workload during cleaning is reduced.

As a further improvement of the utility model, the top of each filter plate and the arc-shaped filter basket is respectively provided with a handle. The filter plate can be conveniently drawn and inserted through the filter plate handle, and the arc-shaped filter basket can be conveniently drawn and inserted through the filter basket handle.

As a further improvement of the utility model, the top of the cleaning box is provided with a cleaning box feed inlet, the cleaning box comprises a horizontal cylinder with one end closed, the front end opening of the cleaning box is hinged with a cleaning box sealing cover which can be opened and closed, the periphery of the cylinder of the cleaning box is coated with a cleaning box jacket, the inner cavity of the cleaning box is provided with a plurality of square filtering drawers which are sequentially superposed from top to bottom, the frames at the left side and the right side of each square filtering drawer are respectively supported in a guiding chute through rollers, each guiding chute extends along the axial direction of the cleaning box and is respectively fixed at the two sides of the inner wall of the cleaning box, the bottom of the inner cavity of the cleaning box is provided with an arc bottom drawer, the bottom of the arc bottom drawer is supported at the bottom of the inner wall of the cleaning box through rollers, the bottoms of the arc bottom drawer and each square filtering drawer are respectively provided with filtering nets, and the mesh number of the lower filtering net is sequentially larger than, the lower end of the feed inlet of the cleaning box points to the central area of the square filter drawer at the top layer, and the bottom center of the cleaning box is provided with a liquid discharge port of the cleaning box. The frames of the drawers are erected upwards, so that the mixture can be prevented from overflowing from the periphery of the filter screen, the guide sliding grooves are convenient for the square filter drawers to be drawn out, cleaned and put back, and the square filter drawers can be ensured to be in a horizontal state; the drawer at the bottom of the arc is positioned at the bottom of the arc of the cleaning box and is in a stable and balanced state, so that the guide sliding groove can be omitted, and the drawer is directly supported at the bottom of the arc of the cleaning box through the idler wheels. The mixture of oligomer and glycol enters the inner cavity of the cleaning box from the feeding hole of the cleaning box, firstly falls on the square filter drawer at the top layer, and is subjected to rough filtration, the mesh of the filter screen at the top layer is large, the liquid permeability is very strong, the overflow caused by blockage is avoided, the largest discharged slag is intercepted, and the slightly smaller discharged slag falls into the next layer for continuous filtration; so successive layer improves filtration precision, and the slag discharging that is the finest is held back by arc bottom drawer, filters the back step by step through the multilayer, and clear ethylene glycol is discharged from the cleaning box leakage fluid dram of cleaning box bottom. The square filtering drawer or the drawer with the arc-shaped bottom can be pulled out for cleaning by opening the cleaning box sealing cover, and the cleaning frequency can be higher than that of other square filtering drawers because the eyelet of the drawer with the arc-shaped bottom is smallest and is most easily blocked, so that each layer is not required to be pulled out for cleaning every time, the cleaning workload is reduced, and the pollution to the field working environment is reduced; the drawer with the arc-shaped bottom is deepest, and the height of the object to be stored is high, so that the overflow is not easy to cause. For high temperature ethylene glycol, cooling water may be introduced into the purge tank jacket to reduce its temperature. For some media with low melting points, steam can be introduced into the jacket of the cleaning box to increase the temperature of the inner cavity of the cleaning box and avoid blockage caused by curing of the media.

Drawings

The invention will be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.

Fig. 1 is a flow chart of the scraper spraying device capable of being cleaned on line.

Fig. 2 is a front view of the medium heat well of the present invention.

Figure 3 is a top view of figure 2 with the atmospheric leg removed.

Fig. 4 is a cross-sectional view taken along a-a in fig. 3.

Fig. 5 is a partially enlarged view of fig. 2.

Fig. 6 is a front view of a filter plate in a hot well.

Fig. 7 is a front view of an arcuate filter basket in a hot well.

Fig. 8 is a top view of fig. 7.

FIG. 9 is a front view of the purge bin of FIG. 1.

Fig. 10 is a left side view of fig. 9.

In the figure: 1. a scraper condenser; 1a, a scraper air inlet; 1b, a scraper air extraction opening; 1c, a scraper medium outlet; 2. a hot well; 2a, a slag discharge port of the hot well; 2b, a hot well liquid phase outlet; 2c, a hot well level gauge port; 2d, thermal well temperature gauge mouth; 2e, hot well top cover; 2e1. hot well manhole covers; 2f, longitudinal partition plates; 2g, transverse wall plates; 2h1. left inner chamber; 2h2. right inner chamber; 2j1. left outer compartment; 2j2. right outer chamber; 2k, sealing a seat; 2k1. filler; 2k2. packing gland; 2m, filtering the plate; 2m1. filter plate handle; 2n. arc-shaped filter basket; 2n1. basket handle; 2p. a conical hopper; 2q. an atmospheric leg; 3. cleaning the box; 3a, cleaning a feed inlet of a box; 3b, cleaning an exhaust port of the box; 3c, cleaning a liquid outlet of the tank; 3d, cleaning the box cover; 3e, cleaning a box jacket; 3e1. cleaning box jacket lower interface; 3e2. cleaning box jacket upper interface; 3f, a square filtering drawer; 3g, an arc-shaped bottom drawer; 3h, rolling wheels; 3j, a guide chute; 3k, searchlighting a lamp socket; 3m, a glass sight glass viewing port; 3n. multiple pipeline interfaces; G1. a circulating liquid conveying pipe; g1a, circulating liquid heating medium jacket; G2. a slag discharge branch pipe; G3. emptying a branch pipe; a heating medium oil supply pipe; g4b, a heat medium oil return pipe; B1. a spray circulation pump; C1. a circulating liquid cooler; v1, a delivery pipe emptying valve; and V2, a slag discharge valve of the conveying pipe.

Detailed Description

As shown in fig. 1, the utility model discloses but online cleaning's scraper blade spray set includes scraper condenser 1, hot-well 2 and spray circulating pump B1, and hot-well 2 includes two rooms about mutually independent, and the medium export of scraper condenser 1 links to each other with two rooms about hot-well 2 through two atmospheric legs 2q, and the bottom symmetry of hot-well 2 is equipped with two hot-well liquid phase exports 2B and two hot-well row cinder notch 2a, and two hot-well row cinder notches 2a link to each other with clearance case 3 respectively; the liquid phase outlets 2B of the two hot wells are respectively connected with the inlets of respective spray circulating pumps B1 through circulating liquid filters, the outlets of the two spray circulating pumps B1 are respectively connected with the medium inlets of circulating liquid coolers C1, the medium outlets of the two circulating liquid coolers C1 are respectively connected with the spray ports of the scraper condenser 1 through circulating liquid conveying pipes G1, the peripheries of the two circulating liquid conveying pipes G1 are respectively coated with circulating liquid heat medium jackets G1a, the lower ends of the circulating liquid heat medium jackets G1a are connected with a heat medium oil supply pipe G4a, and the upper ends of the circulating liquid heat medium jackets G1a are connected with a heat medium oil return pipe G4B; the lower ends of the two circulating liquid conveying pipes G1 are respectively connected with a conveying pipe slag discharge valve V2, and the outlets of the two conveying pipe slag discharge valves V2 are respectively connected with a slag discharge branch pipe G2; the upper ends of the two circulating liquid conveying pipes G1 are respectively provided with a conveying pipe emptying valve V1, the outlets of the two conveying pipe emptying valves V1 are respectively connected with an emptying branch pipe G3, and the outlets of the slag discharging branch pipe G2 and the emptying branch pipe G3 are respectively connected with the inlet of the cleaning box 3.

The scraper condenser 1 comprises a horizontal cylinder and a vertical cylinder, the vertical cylinder is connected to the upper portion of the tail end of the horizontal cylinder, a condensation spray head is arranged in an inner cavity of the vertical cylinder and connected with a spray pipe, a scraper air exhaust port 1b is arranged at the top of the vertical cylinder, a scraper rotor is arranged in the inner cavity of the horizontal cylinder, a scraper air inlet 1a is arranged at the upper portion of the head end of the horizontal cylinder, and a scraper medium outlet 1c is arranged at the lower portion of the tail end of the horizontal cylinder. The method comprises the steps of discharging a mixture of ethylene glycol, water and oligomer from a gas phase port of a polymerization reaction kettle, enabling the mixture to enter a scraper condenser 1 from a scraper gas inlet 1a for spray compensation, discharging the condensed oligomer from a scraper medium outlet 1C along with the ethylene glycol, enabling the condensed oligomer to enter a hot well 2 through an atmosphere leg 2q for filtration, enabling two atmosphere legs 2q to be used for one purpose, discharging the ethylene glycol from a hot well liquid phase outlet 2B, filtering the ethylene glycol through a circulating liquid filter, sending the ethylene glycol out through a spray circulating pump B1, cooling the ethylene glycol through a circulating liquid cooler C1, and returning the ethylene glycol to a spray port of the scraper condenser 1 through a circulating liquid conveying pipe G1 for circular spray. The two-way circulating liquid conveying pipe G1 is in a one-use one-standby state. When the circulating liquid conveying pipe G1 in use needs to be cleaned, the spraying circulating pump B1 and the circulating liquid conveying pipe G1 which are switched to the standby loop operate, the conveying pipe vent valve V1 of the cleaning loop is opened, high-temperature heat conducting oil is input into the circulating liquid heat medium jacket G1a, the oligomer adhered to the inner wall of the circulating liquid conveying pipe G1 is softened and falls off after being heated for a period of time, then the slag discharge valve of the cleaning loop is opened, and the fallen off objects enter the cleaning box 3 through the slag discharge branch pipe G2 along with ethylene glycol in the pipe to be filtered and collected, so that the on-line switching of medium circulation and cleaning pipelines is realized, and the cleaning is avoided being stopped for cleaning.

As shown in fig. 2 to 5, a hot well top cover 2e is arranged at the top of the hot well 2, a longitudinal partition plate 2f is arranged along the longitudinal axis of the hot well 2 to divide the inner cavity of the hot well into a left half and a right half, a left inner chamber 2h1 and a right inner chamber 2h2 are symmetrically arranged at two sides of the middle section of the longitudinal partition plate 2f, a left outer chamber 2j1 is arranged at the outer side of a transverse wall plate 2g of the left inner chamber 2h1, a right outer chamber 2j2 is arranged at the outer side of the transverse wall plate 2g of the right inner chamber 2h2, conical hoppers are respectively arranged at the bottoms of the left inner chamber 2h1 and the right inner chamber 2h2, the lowest parts of the two conical hoppers are respectively connected with a hot well slag discharge port 2a, and the two hot; the bottoms of the left outer chamber 2j1 and the right outer chamber 2j2 are respectively provided with a hot well liquid phase outlet 2 b; two atmospheric legs 2q are inserted on the hot well top cover 2e, the lower ends of the two atmospheric legs 2q are respectively inserted into the lower parts of the inner cavities of the left inner chamber 2h1 and the right inner chamber 2h2, the upper parts of the transverse wall plates 2g are respectively provided with an overflow port communicated with the corresponding outer chamber, the inner ports of the overflow ports are respectively covered with a filter plate 2m, the left side and the right side of each filter plate 2m are respectively inserted into the vertical slots on the inner end surfaces of the transverse wall plates, the outer ports of the overflow ports are respectively covered with an outward convex arc-shaped filter basket 2n, and the left side and the right side of each arc-shaped filter basket 2n are respectively inserted into the vertical slots on the outer end surfaces of the.

Ethylene glycol and a little oligomer flow into the lower part of the left inner chamber 2h1 through a valve and a pipeline at the bottom of the scraper condenser 1 through the left atmospheric leg 2q, and simultaneously play a role of liquid seal, the ethylene glycol flows out after being filtered for the first time by a filter plate 2m upwards, enters the inner chamber of an arc filter basket 2n, enters a left outer chamber 2j1 after being filtered for the second time by the arc filter basket 2n, flows out from a hot well liquid phase outlet 2b at the bottom of the left outer chamber 2j1, is pumped out by an ethylene glycol pump, and is sent to the scraper condenser 1 for circulating spraying after being cooled. Impurities such as oligomers are retained in the left inner chamber 2h1, fall into the conical hopper and are discharged from the hot well slag discharge port 2a. If the left atmospheric leg 2q is blocked, the operation can be immediately switched to the right atmospheric leg 2q, and the hot well liquid phase outlet 2b and the hot well slag discharge port 2a are also switched to the right side to operate, so that the spraying system can stably operate for a long time, the normal operation of the polymerization device is ensured, the shutdown treatment caused by the blockage of the atmospheric leg 2q is avoided, and the loss is greatly reduced. Filter plate 2m is for filtering for the first time, holds back great size impurity, the utility model discloses a filter plate 2m is close to vacuum seal jar's top, is convenient for take filter plate 2m out cleanly, also is convenient for pack back. The convex arc-shaped filter basket 2n not only increases the filtering area, but also increases the containing space; the filter plate 2m and the edges of the left side and the right side of the arc-shaped filter basket 2n are embedded in the vertical slots, so that the filter plate is convenient to pull, insert, clean and assemble.

As shown in fig. 7 and 8, each arc-shaped filter basket 2n extends to the lower part of the corresponding outer chamber, and the arc surface and the bottom of each arc-shaped filter basket 2n are provided with a filter screen respectively. The filtering area of the arc-shaped filtering basket 2n is further increased, so that the arc-shaped filtering basket 2n only needs to be cleaned once after the system continuously works for several days, and the cleaning workload is reduced.

As shown in fig. 5, two atmosphere legs 2q are respectively located at two sides of the longitudinal partition plate 2f and respectively penetrate through the central holes of the sealing seats 2k, the two sealing seats 2k are respectively welded on the hot well top cover 2e, packing 2k1 is respectively arranged in a packing box between the outer wall of the atmosphere leg and the inner wall of the sealing seat 2k, packing glands 2k2 are respectively arranged at the upper parts of the packing 2k1, and flanges of the packing glands 2k2 are connected with flanges of the sealing seats 2k through gland screws. The gland screw is tightened, the packing 2k1 is tightly pressed in the stuffing box through the packing gland 2k2, the periphery of the atmospheric leg 2q is sealed, the atmospheric leg 2q can be guaranteed to vertically and freely slide, and the expansion caused by the temperature change of the system can be automatically adapted.

Two hot well manhole covers 2e1 are symmetrically arranged on the position, far away from the longitudinal partition plate 2f, on the transverse axis of the hot well top cover 2e, and each pair of filter plates 2m and the arc-shaped filter baskets 2n are respectively positioned below the hole opening of the hot well manhole cover 2e1. The hot well manhole cover 2e1 is opened, the filter plate 2m and the arc filter basket 2n can be pulled out for cleaning, the filter plate 2m and the arc filter basket 2n are inserted back after cleaning, and then the hot well manhole cover 2e1 is reset, so that the hot well top cover 2e is prevented from being integrally detached, and the workload during cleaning is reduced.

As shown in fig. 6 and 7, handles are provided at the top of each of the filter plates 2m and the arc-shaped filter baskets 2n. The filter plate 2m can be easily inserted and pulled out by the filter plate handle 2m1, and the arc-shaped filter basket 2n can be easily inserted and pulled out by the filter basket handle 2n1.

The left inner chamber 2h1, the right inner chamber 2h2, the left outer chamber 2j1 and the right outer chamber 2j2 are respectively provided with a hot well material level indicator port 2c, the material levels of the inner chamber and the outer chamber can be displayed and monitored in real time on a distributed control system (namely DCS), and when the atmosphere leg 2q is blocked, the DCS sends alarm information in real time, so that DCS personnel can rapidly arrange field personnel for processing.

Thermal well temperature measuring ports 2d are respectively arranged at the bottom of two sides of the thermal well, and the temperature of the ethylene glycol can be displayed on the DCS in real time.

As shown in fig. 9 and 10, a cleaning box feed port 3a is arranged at the top of a cleaning box 3, the cleaning box comprises a horizontal cylinder with one closed end, a cleaning box sealing cover 3d which can be opened and closed is hinged at the front end of the cleaning box, a cleaning box jacket 3e is coated at the periphery of the cylinder of the cleaning box, a plurality of square filtering drawers 3f which are sequentially overlapped are arranged in the inner cavity of the cleaning box from top to bottom, frames at the left side and the right side of each square filtering drawer 3f are respectively supported in a guiding chute 3j through rollers 3h, each guiding chute 3j extends along the axial direction of the cleaning box and is respectively fixed at the two sides of the inner wall of the cleaning box, an arc bottom drawer 3g is arranged at the bottom of the inner cavity of the cleaning box, the bottoms of the arc bottom drawer 3g and each square filtering drawer 3f are respectively provided with filtering nets, and the mesh number of the lower layer is sequentially larger than that of the upper layer of filtering nets, the lower end of the feed port 3a of the cleaning box points to the central area of the square filter drawer 3f at the top layer, and the center of the bottom of the cleaning box is provided with a liquid outlet 3c of the cleaning box.

The frames of the drawers are erected upwards, so that the mixture can be prevented from overflowing from the periphery of the filter screen, the guide sliding grooves 3j are convenient for the square filter drawers 3f to be drawn out, cleaned and put back, and the square filter drawers 3f can be ensured to be in a horizontal state; the drawer 3g at the bottom of the arc is positioned at the bottom of the arc of the cleaning box and is in a stable and balanced state, so that the guide chute 3j can be omitted and the drawer is directly supported at the bottom of the arc of the cleaning box through the roller 3h. The mixture of oligomer and glycol enters the inner cavity of the cleaning box from the feeding hole 3a of the cleaning box, firstly falls on the square filtering drawer 3f at the top layer, and is subjected to rough filtering, the mesh of the filter screen at the top layer is large, the liquid permeability is very strong, the overflow caused by blockage is avoided, the maximum slag discharge is intercepted, and the slightly smaller slag discharge completely falls into the next layer for continuous filtering; so the successive layer improves filtration precision, and the finest row sediment is held back by arc bottom drawer 3g, filters the back step by step through the multilayer, and clean ethylene glycol is discharged from the cleaning box leakage fluid dram 3c of cleaning box bottom. The square filtering drawer 3f or the arc-shaped bottom drawer 3g can be pulled out for cleaning by opening the cleaning box sealing cover 3d, and the cleaning frequency can be higher than that of other square filtering drawers 3f because the eyelet of the arc-shaped bottom drawer 3g is smallest and is most easy to block, so that each layer is not required to be pulled out for cleaning every time, the cleaning workload is reduced, and the pollution to the field working environment is reduced; the drawer 3g with the arc-shaped bottom is deepest, and the height of the object to be stored is high, so that overflow is not easy to cause. For high temperature ethylene glycol, cooling water may be introduced into the purge tank jacket 3e to lower the temperature thereof. For some media with low melting point, steam can be introduced into the jacket 3e of the cleaning box to increase the temperature of the inner cavity of the cleaning box and avoid blockage caused by curing of the media.

The left side and the right side of the exhaust port 3b of the cleaning box are respectively provided with a searchlight mouth 3k and a glass sight glass viewing port 3m, the bottom of the cleaning box jacket 3e is connected with a cleaning box jacket lower interface 3e1, the top of the cleaning box jacket 3e is connected with a cleaning box jacket upper interface 3e2, and the top of the cleaning box is also provided with a multi-pipeline interface 3n. The light is injected from the searchlight socket 3k, and the inner interception state can be observed from the observation port 3m of the glass sight glass at the other side, so that the cleaning time can be accurately determined. Cooling water enters from the lower port 3e1 of the cleaning box jacket at the bottom and flows out from the upper port 3e2 of the cleaning box jacket at the top. When receiving the steam, the steam enters from the upper connector 3e2 of the cleaning box jacket at the top, and the condensed water is discharged from the lower connector 3e1 of the cleaning box jacket at the bottom. The multi-pipe interface 3n may be used for pressure measurement, liquid replenishment or inert gas protection, etc.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All the technical solutions formed by adopting equivalent substitutions or equivalent transformations fall within the protection scope claimed by the present invention. The undescribed technical features of the present invention can be realized by or using the prior art, and are not described herein again.

Claims

1. The utility model provides a but online cleaning's scraper blade spray set, includes scraper blade condenser, hot-well and sprays the circulating pump, the hot-well includes two rooms about mutually independent, the medium export of scraper blade condenser links to each other its characterized in that with two rooms about the hot-well through two atmospheric legs: the bottom of the hot well is symmetrically provided with two hot well liquid phase outlets and two hot well slag discharge ports, and the two hot well slag discharge ports are respectively connected with the cleaning box; the liquid phase outlets of the two hot wells are respectively connected with inlets of respective spray circulating pumps through circulating liquid filters, outlets of the two spray circulating pumps are respectively connected with a medium inlet of a circulating liquid cooler, medium outlets of the two circulating liquid coolers are respectively connected with a spray port of the scraper condenser through circulating liquid conveying pipes, the peripheries of the two circulating liquid conveying pipes are respectively coated with a circulating liquid heat medium jacket, the lower end of the circulating liquid heat medium jacket is connected with a heat medium oil supply pipe, and the upper end of the circulating liquid heat medium jacket is connected with a heat medium oil return pipe; the lower ends of the two circulating liquid conveying pipes are respectively connected with a conveying pipe slag discharging valve, and the outlets of the two conveying pipe slag discharging valves are respectively connected with slag discharging branch pipes; and the upper ends of the two circulating liquid conveying pipes are respectively provided with a conveying pipe emptying valve, the outlets of the two conveying pipe emptying valves are respectively connected with an emptying branch pipe, and the outlets of the slag discharging branch pipe and the emptying branch pipe are respectively connected with the inlet of the cleaning box.

2. The online cleanable squeegee spray apparatus of claim 1, wherein: the top of the hot well is provided with a hot well top cover, a longitudinal clapboard is arranged along the longitudinal axis of the hot well to divide the inner cavity of the hot well into a left half and a right half, a left inner chamber and a right inner chamber are symmetrically arranged at two sides of the middle section of the longitudinal clapboard, the outer side of the transverse wallboard of the left inner chamber is a left outer chamber, the outer side of the transverse wallboard of the right inner chamber is a right outer chamber, the bottoms of the left inner chamber and the right inner chamber are respectively provided with a conical hopper, the lowest part of the two conical hoppers is respectively connected with a hot well slag discharge port, and the two hot well slag discharge ports respectively extend downwards to the; the bottoms of the left outer chamber and the right outer chamber are respectively provided with the hot well liquid phase outlets; the hot well top cover is spliced with two atmospheric legs, the lower ends of the two atmospheric legs are respectively inserted into the lower parts of the inner cavities of the left inner chamber and the right inner chamber, the upper part of each transverse wallboard is respectively provided with an overflow port communicated with the corresponding outer chamber, the inner port of each overflow port is respectively covered with a filter plate, the left side and the right side of each filter plate are respectively spliced in the vertical slots on the inner end surfaces of the transverse wallboards, the outer port of each overflow port is respectively covered with an outward-protruding arc-shaped filter basket, and the left side and the right side of each arc-shaped filter basket are respectively spliced in the vertical slots on the outer end surfaces of the transverse wallboards.

3. The online cleanable squeegee spray apparatus of claim 2, wherein: each arc-shaped filter basket extends towards the lower part of the corresponding outer chamber, and the cambered surface and the bottom of each arc-shaped filter basket are respectively provided with a filter screen.

4. The online cleanable squeegee spray apparatus of claim 2, wherein: the two atmosphere legs are respectively positioned on two sides of the longitudinal partition plate and respectively penetrate through the central holes of the sealing seats, the two sealing seats are respectively welded on the top cover of the hot well, packing is respectively arranged in packing boxes between the outer walls of the atmosphere legs and the inner wall of the sealing seats, packing glands are respectively arranged on the upper portions of the packing, and flanges of the packing glands are connected with flanges of the sealing seats through gland screws.

5. The online cleanable squeegee spray apparatus of claim 4, wherein: two hot well manhole covers are symmetrically arranged on the position, far away from the longitudinal partition plate, on the transverse axis of the hot well top cover, and each pair of filter plate and the arc-shaped filter basket are respectively positioned below the hole opening of the hot well manhole cover.

6. The online cleanable squeegee spray apparatus of claim 2, wherein: handles are respectively arranged at the tops of the filter plates and the arc-shaped filter basket.

7. The inline-cleanable squeegee spray apparatus of any one of claims 1-6, wherein: the top of the cleaning box is provided with a cleaning box feed inlet, the cleaning box comprises a horizontal barrel with one end sealed, the front end opening of the cleaning box is hinged with a cleaning box sealing cover which can be opened and closed, the periphery of the barrel of the cleaning box is coated with a cleaning box jacket, the inner cavity of the cleaning box is provided with a plurality of sequentially superposed square filtering drawers from top to bottom, the frames at the left side and the right side of each square filtering drawer are respectively supported in guiding chutes through rollers, each guiding chute extends along the axial direction of the cleaning box and is respectively fixed at the two sides of the inner wall of the cleaning box, the bottom of the inner cavity of the cleaning box is provided with an arc bottom drawer, the bottom of the arc bottom drawer is supported at the bottom of the inner wall of the cleaning box through rollers, the bottoms of the arc bottom drawer and each square filtering drawer are respectively provided with filtering screens, the mesh number of the lower filtering screen is sequentially larger than that of the upper filtering screen, and the lower end of the cleaning box feed inlet points to the, and a liquid outlet of the cleaning box is formed in the center of the bottom of the cleaning box.