Cooling tower water supply circulation system for spinning cooling of screw extruder

Abstract

The invention discloses a cooling tower water supply circulation system for spinning cooling of a screw extruder, which comprises a tower body, a water pump and a water tank positioned below the tower body, support legs are arranged at the bottom of the tower body, an exhaust fan is arranged at the top of the tower body, and a water collection device, a hot water atomization device, a secondary atomization device and a ventilation shutter are sequentially arranged in the tower body from top to bottom. A drainage pipe located above the water tank is arranged at the bottom of the tower body, a water inlet of the water pump is connected with a water pumping pipe extending into the water tank, a water outlet of the water pump is connected with a hollow water distribution disc through a water outlet pipe, the hollow water distribution disc is horizontally arranged, and a plurality of water flow blockage condition monitors are arranged on the bottom surface of the hollow water distribution disc. The contact area of water drops and air is increased, the heat exchange efficiency between the water drops and the air flowing upwards is higher, the cooling effect on hot water is obviously improved, meanwhile, water mist flowing along with the air is recycled, and water resource loss is reduced. Meanwhile, whether the annular water jacket is blocked or seriously blocked or not is visually monitored in real time, and whether the annular water jacket needs to be maintained and unblocked or not is judged.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of hair fiber production, and particularly relates to a cooling tower water supply circulation system for spinning and cooling of a screw extruder. BACKGROUND

[0002] The production of hair fibers involves a spinning process cooling system. The cooling system is used to discharge the excess heat generated by the shearing and friction of the screw during the operation of the screw extruder, so as to avoid the decrease of the melt viscosity and the decomposition of the plastic caused by the temperature rise. In a hair fiber production workshop, multiple screw extruders work simultaneously. Each screw extruder is externally provided with a cooling water jacket, and a cooling water tower is arranged outside the workshop. The hot water after heat exchange in each cooling water jacket is returned to the cooling water tower through a hot water pipeline for cooling, and the hot water cooled and lowered in temperature by the cooling water tower is pumped to the cooling water jacket through a circulating water pump.

[0003] At present, the cooling water tower is mainly a packed tower. If the water quality system used is poor, the tower packing is prone to blockage. In addition, the packing is prone to aging, deformation and brittle fracture, and is prone to channeling. The packing fragments can also block the equipment and pipelines of the process system, affect the original distribution of gas and water, and reduce the effective heat exchange area in the tower. Due to long-term use, different blockage conditions may occur in the cooling water jacket outside the screw extruder, affecting the cooling effect of the cooling water on the screw extruder, and further affecting the spinning quality. At present, it is difficult to observe whether there is blockage to determine the cleaning cycle of the cooling water jacket. Therefore, the protective cover is removed every certain period of time to check the blockage condition and clean the inside. This working method is relatively passive, and sometimes the inside is not blocked after disassembly. This will affect the work efficiency. SUMMARY

[0004] In order to solve the above technical problems in the prior art, the application provides a cooling tower water supply circulation system for spinning and cooling of a screw extruder, which has high heat exchange efficiency and can directly monitor whether the cooling water jacket is blocked.

[0005] To solve the above technical problems, the application adopts the following technical scheme: the cooling tower water supply circulation system for spinning and cooling of a screw extruder comprises a tower body, a water pump and a water pool located below the tower body. The bottom of the tower body is provided with a supporting leg, and the outer wall of the tower body is provided with a plurality of heat dissipation reinforcing rib plates. Each heat dissipation reinforcing rib plate is vertically arranged. The tower body and the heat dissipation reinforcing rib plates are made of stainless steel sheets. The top of the tower body is provided with an air extractor. The tower body is sequentially provided, from top to bottom, with a water collecting device, a hot water atomizing device, a secondary atomizing device and a ventilation louver. The bottom of the tower body is provided with a drain pipe located above the water pool. The water pump is connected with a water pumping pipe which extends into the water pool. The outlet of the water pump is connected with a hollow water distribution disc through a water outlet pipe. The hollow water distribution disc is horizontally arranged. The bottom surface of the hollow water distribution disc is provided with a plurality of water flow blockage condition monitors.

[0006] The tower body is rectangular in cross section, the water collecting device comprises a stainless steel cylinder which is rectangular in cross section, a support rail is arranged on the front and rear inner walls of the tower body respectively, the front and rear sides of the stainless steel cylinder are arranged on the front and rear support rails respectively, the outer wall of the stainless steel cylinder is used for contacting the inner wall on the same side of the tower body, a rectangular opening for horizontally pushing and pulling the stainless steel cylinder is arranged on the right side of the tower body, a sealing door is arranged at the rectangular opening, a door handle is arranged on the outer side of the sealing door, and at least two groups of baffle water collecting and guiding structures are arranged in the stainless steel cylinder.

[0007] Each group of baffle water collecting and guiding structures comprises an upper layer of half circular pipe assemblies and a lower layer of half circular pipe assemblies, the lower layer of half circular pipe assemblies comprises a plurality of downward open half circular pipes which are uniformly and spacedly arranged along the left-right direction, the center line of each half circular pipe is along the front-rear direction, and the front and rear ends of each half circular pipe are fixedly connected to the front and rear side plates of the stainless steel cylinder respectively. The upper layer of half circular pipe assemblies comprises a plurality of upward open half circular pipes which are uniformly and spacedly arranged along the left-right direction, the center line of each half circular pipe is along the front-rear direction, and the front and rear ends of each half circular pipe are fixedly connected to the front and rear side plates of the stainless steel cylinder respectively. The left side edge of the leftmost half circular pipe of the upper layer of half circular pipe assemblies is fixedly connected to the inner wall of the left side plate of the stainless steel cylinder, the right side edge of the rightmost half circular pipe of the upper layer of half circular pipe assemblies is fixedly connected to the inner wall of the right side plate of the stainless steel cylinder, each half circular pipe is located directly below the adjacent two half circular pipes, and the outer circle of the half circular pipe and the outer circle of the half circular pipe form a first air flow gap. The uppermost half circular pipe of the upper group of baffle water collecting and guiding structures is located directly above the adjacent two half circular pipes, and the inner circle of the half circular pipe of the upper group of baffle water collecting and guiding structures and the inner circle of the half circular pipe of the lower group of baffle water collecting and guiding structures form a second air flow gap.

[0008] A water filtering and air permeating net is horizontally arranged at the upper end of the stainless steel cylinder, the four edges of the water filtering and air permeating net are fixedly connected to the inner wall of the stainless steel cylinder, and the bottom surface of the water filtering and air permeating net is connected to the half circular pipes of the uppermost group of baffle water collecting and guiding structures. Each half circular pipe is provided with a water falling hole penetrating upward and downward at the bottom of each end. The surface of each half circular pipe and each half circular pipe is sprayed with a nano material to form a hydrophobic rough surface.

[0009] The hot water atomizing device comprises a water inlet main pipe and a plurality of water spraying pipes, the water spraying pipes are uniformly and spacedly arranged in the tower body along the front-rear direction, each water spraying pipe is horizontally arranged along the left-right direction, the right ends of all the water spraying pipes penetrate through and extend out of the right side wall of the tower body, the water inlet main pipe is arranged outside the right side of the tower body along the front-rear direction, the right end of each water spraying pipe is connected to the left side of the water inlet main pipe, and each water spraying pipe is provided with a plurality of atomizing nozzles which are arranged at intervals along the left-right direction.

[0010] The secondary atomization device is a grid plate in the shape of a whole rectangle, support strips for placing the grid plate are arranged on the inner wall of the tower body, the height of the grid plate is 20 mm, a plurality of square grid holes are uniformly arranged on the grid plate, the side length of each grid hole is 6-9 mm, and the distance between adjacent two grid holes, i.e., the thickness of the grid, is 0.6-0.8 mm.

[0011] The water flow blockage condition monitor comprises, from top to bottom, a water inlet pipe joint, a transparent conical pipe, a cover plate and a water outlet pipe joint, the transparent conical pipe is large at the top and small at the bottom, the upper end of the transparent conical pipe is connected with the lower end of the water inlet pipe joint, the cover plate is detachably connected at the lower end of the transparent conical pipe, the upper end of the water outlet pipe joint is connected at the center of the cover plate, an elastic valve assembly is arranged on the upper surface of the cover plate and located in the transparent conical pipe, and a scale line for monitoring the position of the elastic valve assembly is arranged on the outer surface of the transparent conical pipe along the generatrix direction.

[0012] The elastic valve assembly comprises a disc-shaped valve plate, the valve plate is coaxial with the cover plate and parallel to the cover plate, the bottom surface of the valve plate is connected with the top surface of the cover plate through a plurality of compression springs, the plurality of springs are arranged in a circumferential array along the center line of the cover plate, the bottom surface of the valve plate is provided with an upper positioning column located inside the upper end of the compression spring, and the top surface of the valve plate is provided with a lower positioning column located inside the lower end of the compression spring.

[0013] The lower end of the transparent conical pipe is integrally provided with an annular plate, the top surface of the cover plate is attached to the bottom surface of the annular plate and connected into an integral whole through a plurality of circumferentially arranged bolt assemblies, and a sealing ring is arranged between the top surface of the cover plate and the bottom surface of the annular plate. The outer circle of the cover plate and the outer circle of the annular plate are both provided with upper and lower corresponding installation positioning mark grooves.

[0014] A plurality of pulling members are arranged between the top surface of the cover plate and the inner wall of the transparent conical pipe, all the pulling members are arranged in a circumferential array along the center line of the cover plate and located outside the elastic valve assembly. Each pulling member comprises a first L-shaped plate and a second L-shaped plate, the vertical section of the first L-shaped plate is fixedly connected with the top surface of the cover plate at the lower end, the vertical section of the second L-shaped plate is fixedly connected with the inner wall of the transparent conical pipe at the upper end, the horizontal section at the upper end of the first L-shaped plate forms a hooking gap with the cover plate, the horizontal section at the lower end of the second L-shaped plate extends into the hooking gap, and the bottom surface of the horizontal section at the upper end of the first L-shaped plate is press-fit with the top surface of the horizontal section at the lower end of the second L-shaped plate.

[0015] Compared with the prior art, the present application has the following beneficial effects: 1) The present application cancels the filler in the tower body, overcomes the traditional cooling tower filler aging, deformation, brittle fracture and water distribution nozzle blockage and falling, filler brittle piece blockage pipeline, pump and heat exchanger and a series of phenomena affecting the performance of tower and process system equipment. At the same time, the primary atomizing nozzle and the secondary atomizing device are used to effectively control the diffusion angle of water droplet jet flow, so as to reduce the occurrence of wall flow phenomenon, increase the contact area of water droplet and air, and the heat exchange efficiency between the upward flowing air is higher, the cooling effect of hot water is obviously improved.

[0016] 2) The heat dissipation reinforcing rib plate is arranged on the outer wall of the tower body, the high temperature water mist in the tower body can exchange heat with air outside the tower body, and the heat exchange efficiency is further improved.

[0017] 3) Two supporting guide rails and sealing doors are arranged in the tower body, which facilitates the placement and horizontal pulling out of the water collecting device. The water collecting device will collect water mist along with the upward air, reducing water loss. The water collecting device adopts a plurality of baffle water collecting guide structures arranged in the stainless steel cylinder. Each group of baffle water collecting guide structures adopts an upper half circular pipe with open top and a lower half circular pipe with open bottom. The upper and lower half circular pipes are arranged in staggered manner to realize the baffle guiding of air flow, improve the contact area with water mist in air, and most importantly, the surface of the upper half circular pipe and each lower half circular pipe is sprayed with nano material to form a hydrophobic rough surface. The water mist passes through the first airflow gap and the second airflow gap in the baffle shape, contacts the hydrophobic rough surface, and the hydrophobic rough surface efficiently captures the water mist in the air to form water droplets, and guides the water droplets to gather and flow, promotes the water droplets to roll, and the water droplets gathered in the upper half circular pipe fall downward through the water falling hole. When the air passes through the water filtering air permeable net on the top, the little water mist in the air is captured by the water filtering air permeable net again, and the water droplets are formed after gathering and falling downward. In this way, after passing through at least two groups of baffle water collecting guide structures, the water mist in the air is basically collected, and the air discharged from the tower body contains little water mist, thereby reducing the waste of water resources.

[0018] 4) The outlet of the cooling water jacket of the screw extrusion pressure is connected with the inlet of the hot water atomizing device through a hot water pipeline. The hot water atomizing device uses one inlet to supply water to multiple water spray pipes, and the water is atomized by the atomizing nozzles on the multiple water spray pipes. The diameter of the water droplets sprayed out of the atomizing nozzles has a certain limit. In order to obtain smaller diameter water droplets or mist droplets, a secondary atomizing device is provided below to achieve the purpose of secondary atomizing water droplets through auxiliary means. The working principle of the secondary atomizing device is as follows: after the water is sprayed downward by the atomizing nozzles, it forms rapidly descending water droplets. Since the atomizing nozzles have a certain diffusion angle, the water droplets have a certain angle with the vertical direction when they descend. When the rapidly descending water droplets collide with the top of the grid plate, a part of the water droplets directly hit the 0.6-0.8mm grid on the upper end of the grid hole and are cut into smaller water droplets. Most of the water droplets will collide with the side of the grid hole and break into many smaller water droplets, thereby achieving the purpose of secondary atomizing water droplets, increasing the contact area of water droplets with air, and improving the heat exchange effect with flowing air.

[0019] 5) After the water mist atomized by two stages exchanges heat with the rising air, the cool water flows into the water pool through the drain pipe. The water pump pumps the water in the water pool out through the suction pipe and then delivers it to the hollow water distribution disc through the outlet pipe. The high-pressure water is supplied to multiple water flow blockage condition monitors in the hollow water distribution disc at the same time. The outlet joint of each water flow blockage condition monitor is connected with a cold water pipeline and a screw extrusion pressure cooling water jacket inlet respectively. The high-pressure water pushes the valve plate to move downward, and the water flow is observed in real time according to the scale corresponding to the position of the valve plate. A transparent conical tube is provided to facilitate the observation of the position of the valve plate on the scale line to determine whether blockage occurs in the pipeline.

[0020] The cover plate is fixedly connected with the annular plate through a plurality of bolt assemblies, which facilitates the installation of the elastic valve assembly inside and ensures the reliability of the sealing by providing a sealing ring. Due to the large area of the cover plate and the small diameter of the outlet joint, in order to avoid the high water pressure causing the middle part of the cover plate to protrude downward and affecting the sealing, a pulling member is specially provided. When the cover plate is under pressure, the second L-shaped plate pulls the first L-shaped plate, so that the cover plate maintains horizontal, ensuring the sealing between the cover plate and the annular plate, and also improving the strength of the cover plate.

[0021] When installing the cover plate, first make the installation positioning mark groove on the cover plate and the installation positioning mark groove on the annular plate stagger at a certain angle, then rotate the cover plate or the transparent conical tube, so that the installation positioning mark grooves on the cover plate and the annular plate correspond, the holes corresponding to the bolt assemblies between the cover plate and the annular plate are all through one by one, and at this time the horizontal section of the lower end of the second L-shaped plate extends into the hooking gap, ensuring that each pulling member is assembled and connected in place.

[0022] In summary, the present application principle is scientific, by setting a primary atomizing nozzle and secondary atomizing device, effectively control the diffusion angle of water droplet jet flow, thereby reducing the occurrence of wall flow phenomenon, increase the contact area of water droplets and air, the heat exchange efficiency between the upward flowing air is higher, the cooling effect of hot water is obviously improved, at the same time, the water mist flowing with the air is recycled, reducing water loss; Water flow blockage monitor adopts pure mechanical structure, not easy to damage, long service life, the scale value corresponding to the observation of valve plate position is observed, so as to judge whether the annular water jacket outside the screw extruder is blocked or blocked very seriously, the sleeve blockage condition is analyzed, whether it needs to be repaired and unblocked, so as to timely disassemble the annular water jacket. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present application; Figure 2 It is Figure 1 an enlarged view of the water collecting device; Figure 3 It is Figure 2 a top view after removing the water filtering and air permeable net; Figure 4 It is Figure 1 a top view of the secondary atomizing device in the present application; Figure 5 It is Figure 1 an A-A sectional view in the present application; Figure 6 It is a structural schematic diagram of the water flow blockage monitor in the state of no water pressure; Figure 7 It is a structural schematic diagram of the water flow blockage monitor in the state of normal water conveying work; Figure 8 It is Figure 6 and Figure 7 a top view of the cover plate in the present application. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0025] As Figures 1-8As shown, the cooling tower water supply circulation system of the screw extruder spinning cooling tower of the present application comprises a tower body 30, a water pump 54 and a water pool 55 below the tower body 30, the bottom of the tower body 30 is provided with a supporting leg 31, the top of the tower body 30 is provided with an air extractor 32, the tower body 30 is sequentially provided with a water collecting device 33, a hot water atomizing device, a secondary atomizing device 34 and a ventilation louver 35 from top to bottom, the bottom of the tower body 30 is provided with a drain pipe 36 above the water pool 55, the drain pipe 36 is provided with a drain valve 56, the outer wall of the tower body 30 is provided with a plurality of heat dissipation reinforcing ribs 37, each of the heat dissipation reinforcing ribs 37 is vertically arranged, the tower body 30 and the heat dissipation reinforcing ribs 37 are both made of stainless steel sheet; the water pump 54 is connected with a water pumping pipe 57 extending into the water pool 55, the outlet of the water pump 54 is connected with a hollow water distribution disc 59 through a water outlet pipe 58, the hollow water distribution disc 59 is horizontally arranged, and the bottom surface of the hollow water distribution disc 59 is provided with a plurality of water flow blockage monitoring devices 24.

[0026] The cross section of the tower body 30 is rectangular, the water collecting device 33 comprises a stainless steel cylinder 38 with a rectangular cross section, the front side and the rear side of the inner wall of the tower body 30 are respectively provided with a supporting rail 39, the front side and the rear side of the stainless steel cylinder 38 are respectively arranged on the front and rear supporting rails 39, and the outer wall of the stainless steel cylinder 38 is in contact with the same side of the inner wall of the tower body 30, a rectangular opening for horizontally pushing and pulling the stainless steel cylinder 38 is formed in the right side of the tower body 30, a sealing door 40 is arranged at the rectangular opening, a door handle 41 is arranged on the outer side of the sealing door 40, and at least two groups of baffling water collecting gas guide structures are arranged in the stainless steel cylinder 38.

[0027] Each group of baffling water collecting gas guide structures comprises an upper layer half circular pipe assembly and a lower layer half circular pipe assembly, the lower layer half circular pipe assembly comprises a plurality of downward-opening half circular pipes 42, the plurality of downward-opening half circular pipes 42 are uniformly and spacedly arranged along the left-right direction, the center line of each downward-opening half circular pipe 42 is along the front-rear direction, and the front and rear ends of each downward-opening half circular pipe 42 are fixedly connected to the front and rear side plates of the stainless steel cylinder 38. The upper layer half circular pipe assembly comprises a plurality of upward-opening half circular pipes 43, the plurality of upward-opening half circular pipes 43 are uniformly and spacedly arranged along the left-right direction, the center line of each upward-opening half circular pipe 43 is along the front-rear direction, and the front and rear ends of each upward-opening half circular pipe 43 are fixedly connected to the front and rear side plates of the stainless steel cylinder 38. The left side edge of the leftmost upward-opening half circular pipe 43 of the upper layer half circular pipe assembly is fixedly connected to the inner wall of the left side plate of the stainless steel cylinder 38, the right side edge of the rightmost upward-opening half circular pipe 43 of the upper layer half circular pipe assembly is fixedly connected to the inner wall of the right side plate of the stainless steel cylinder 38, each downward-opening half circular pipe 42 is located directly below the adjacent two upward-opening half circular pipes 43, and the first air flow gap 44 is formed between the outer circle of the downward-opening half circular pipe 42 and the outer circle of the upward-opening half circular pipe 43. The lower half circular tube 42 of the upper set of deflection water collecting and air guiding structure is located directly above the adjacent two upper half circular tubes 43, and a second air flow gap 45 is formed between the inner circle of the lower half circular tube 42 of the upper set of deflection water collecting and air guiding structure and the inner circle of the upper half circular tube 43 of the lower set of deflection water collecting and air guiding structure.

[0028] A water filtering and air permeating net 46 is horizontally arranged at the upper end of the stainless steel cylinder 38, and the four edges of the water filtering and air permeating net 46 are fixedly connected with the inner wall of the stainless steel cylinder 38, and the bottom surface of the water filtering and air permeating net 46 is connected with the upper half circular tube 43 of the uppermost set of deflection water collecting and air guiding structure.

[0029] A water falling hole 47 is arranged at the bottom of each upper half circular tube 43.

[0030] The surface of each upper half circular tube 43 and each lower half circular tube 42 is sprayed with a nano material to form a hydrophobic rough surface.

[0031] The hot water atomizing device comprises a water inlet main pipe 48 and a plurality of water spraying pipes 49, the plurality of water spraying pipes 49 are uniformly and spacedly arranged in the front-rear direction in the tower body 30, each water spraying pipe 49 is horizontally arranged in the left-right direction, the right end of each water spraying pipe 49 penetrates and extends out of the right side wall of the tower body 30, the water inlet main pipe 48 is arranged outside the right side of the tower body 30 in the front-rear direction, the right end of each water spraying pipe 49 is connected with the left side of the water inlet main pipe 48, and a plurality of atomizing nozzles 50 are arranged at the bottom of each water spraying pipe 49 in the left-right direction.

[0032] The secondary atomizing device 34 is a grid plate 51 in the shape of a rectangle as a whole, a support strip 52 for placing the grid plate 51 is arranged on the inner wall of the tower body 30, the height of the grid plate 51 is 20 mm, a plurality of square grid holes 53 are uniformly arranged on the grid plate 51, the side length of each grid hole 53 is 6-9 mm, and the distance between adjacent two grid holes 53, i.e. the thickness of the grid is 0.6-0.8 mm.

[0033] The water flow blockage monitoring device 24 comprises, from top to bottom, a water inlet pipe joint 1, a transparent conical pipe 2, a cover plate 3 and a water outlet pipe joint 4, the transparent conical pipe 2 is large at the top and small at the bottom, the upper end of the transparent conical pipe 2 is connected with the lower end of the water inlet pipe joint 1, the cover plate 3 is detachably connected with the lower end of the transparent conical pipe 2, the upper end of the water outlet pipe joint 4 is connected with the center of the cover plate 3, an elastic valve assembly is arranged on the upper surface of the cover plate 3 in the transparent conical pipe, and a scale line 5 for monitoring the position of the elastic valve assembly is arranged on the outer surface of the transparent conical pipe 2 along the generatrix direction.

[0034] The elastic valve assembly comprises a disc-shaped valve plate 6 which is coaxial and parallel to the cover plate 3, and is connected between the bottom surface of the valve plate 6 and the top surface of the cover plate 3 by a plurality of compression springs 7 arranged in a circumferential array along the center line of the cover plate 3, and the valve plate 6 is provided with an upper positioning column 8 inside the upper end of the compression spring 7 and a lower positioning column 9 inside the lower end of the compression spring 7.

[0035] The outer edge of the lower end of the transparent conical tube 2 is integrally provided with an annular plate 10, the top surface of the cover plate 3 is attached to the bottom surface of the annular plate 10 and is connected as a whole by a plurality of circumferentially arranged bolt assemblies 11, and a sealing ring 12 is arranged between the top surface of the cover plate 3 and the bottom surface of the annular plate 10.

[0036] The outer circle of the cover plate 3 and the outer circle of the annular plate 10 are both provided with upper and lower corresponding installation positioning mark grooves 15.

[0037] A plurality of pulling members are arranged between the top surface of the cover plate 3 and the inner wall of the transparent conical tube 2, and all the pulling members are arranged in a circumferential array along the center line of the cover plate 3 and are located outside the elastic valve assembly.

[0038] Each pulling member comprises a first L-shaped plate 13 and a second L-shaped plate 14, the vertical section of the first L-shaped plate 13 is fixedly connected to the top surface of the cover plate 3, the vertical section of the second L-shaped plate 14 is fixedly connected to the inner wall of the transparent conical tube 2, the horizontal section at the upper end of the first L-shaped plate 13 forms a hooking gap with the cover plate 3, the horizontal section at the lower end of the second L-shaped plate 14 extends into the hooking gap, and the bottom surface of the horizontal section at the upper end of the first L-shaped plate 13 is press-fit with the top surface of the horizontal section at the lower end of the second L-shaped plate 14.

[0039] The working process of the application is as follows: after the air extractor 32 is started, the inside of the tower body 30 is pumped, the outside air enters the tower body 30 through the air baffle 35, and is pumped out by the air extractor 32 after passing through the secondary atomization device 34, the hot water atomization device and the water collecting device 33. The high-temperature water in the annular water jacket outside the screw extruder absorbs heat and enters the tower body 30 through the hot water atomization device, atomizes the hot water, and sufficiently increases the contact area of the hot water and the air. The atomized hot steam exchanges heat with the upward air, and the cooling effect of the high-temperature water mist is obviously improved. The diameter of the water droplets sprayed out of the atomizing nozzle 50 has a certain limit. In order to obtain smaller diameter water droplets or mist droplets, the secondary atomization device 34 is arranged below, so that the purpose of secondary atomizing the water droplets is achieved by auxiliary means. The working principle of the secondary atomization device 34 is as follows: after the water is sprayed downward through the atomizing nozzle 50, the water droplets form a rapid downward movement. Since the atomizing nozzle 50 has a certain diffusion angle, the water droplets have a certain angle with the vertical direction when they fall. When the rapidly falling water droplets collide with the top of the grid plate 51, a part of the water droplets directly hit the 0.6-0.8mm grid on the upper end of the grid hole 53 and are cut into smaller water droplets. Most of the water droplets will collide with the side of the grid hole 53 and break into many smaller water droplets, thereby achieving the purpose of secondary atomizing the water droplets, increasing the contact area of the water droplets and the air, and improving the heat exchange effect with the flowing air. The water droplets after heat exchange are collected at the bottom of the tower body 30 and discharged into the water tank 55 (water is supplemented into the water tank 55 at intervals) through the drain pipe 36. The water pump 54 pumps the water in the water tank 55 out through the water suction pipe 57, and then delivers the water to the hollow water distribution disc 59 through the water outlet pipe 58. The high-pressure water supplies water to multiple water flow blockage condition monitors 24 in the hollow water distribution disc 59 at the same time. The water outlet pipe joint 4 of each water flow blockage condition monitor 24 is respectively connected with a cold water pipe and the water inlet of a cooling water jacket of a screw extruder. The high-pressure water pushes the valve plate 6 to move downward, and the water flow is observed in real time according to the scale corresponding to the position of the valve plate 6. The transparent conical pipe 2 is arranged to facilitate the observation of the position of the valve plate 6 on the scale line to determine whether the pipe is blocked, thereby realizing the circulating cooling of the screw extruder.

[0040] When the air passes through the water collecting device 33, the air will carry a lot of water mist. The water mist passes through the first air flow gap 44 and the second air flow gap 45 in the form of a baffle, contacts the hydrophobic rough surface, and the hydrophobic rough surface efficiently captures the water mist in the air and guides the water droplets to gather and flow, promoting the water droplets to roll down and fall into the upper half pipe 43. When the air passes through the uppermost water filtering air permeable net 46, the little water mist in the air is captured again by the water filtering air permeable net 46, and then falls down after gathering into water droplets. In this way, after passing through at least two groups of baffle water collecting and guiding air structures, the water mist in the air is basically collected, and the air discharged from the tower body 30 through the air extractor 32 contains little water mist, thereby reducing the waste of water resources.

[0041] The working process of the water flow blockage condition monitor 24 is as follows: the high-pressure water in the hollow water distribution disc 59 enters the transparent conical pipe through the water inlet joint 1, and exerts pressure on the valve plate 6, the valve plate 6 moves downward, the compression spring 7 is compressed, the high-pressure water passes through the annular gap between the outer circle of the valve plate 6 and the inner wall of the transparent conical pipe 2 downward, and then is discharged through the water outlet joint 4. Since the scale line 5 for monitoring the position of the valve plate 6 is arranged on the outer wall of the transparent conical pipe 2, the position of the valve plate 6 is 0 scale when the outer circle of the valve plate 6 contacts the inner circle of the transparent conical pipe, the scale line 5 is marked with numbers downward from 0 scale, and the scale value corresponding to the position of the valve plate 6 is set to be in the range of 8-20 as the normal working scale of water pressure, when the scale value corresponding to the valve plate 6 is in the range of 0-8, it indicates that blockage is generated in the cooling water jacket, the smaller the scale value, the more serious the blockage, at this time, the spinning operation needs to be stopped, and the cooling water jacket needs to be disassembled for blockage removal.

[0042] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application rather than limit the same, and although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solutions of the present application can still be modified or replaced equivalently, and these modifications or equivalent replacements should not make the modified technical solutions deviate from the spirit and scope of the technical solutions of the present application.

Claims

1. A cooling tower water circulation system for cooling the spinning process of a screw extruder, comprising a tower body, a water pump, and a water tank located below the tower body, wherein the bottom of the tower body is provided with support legs, characterized in that: The outer wall of the tower is equipped with several heat dissipation reinforcing ribs, each of which is vertically arranged. Both the tower body and the heat dissipation reinforcing ribs are made of thin stainless steel plates. An exhaust fan is installed at the top of the tower body. From top to bottom, the tower body is equipped with a water collection device, a hot water atomizing device, a secondary atomizing device, and a ventilation louver. A drain pipe is located above the water tank at the bottom of the tower body. The water pump inlet is connected to a water pumping pipe that extends into the water tank. The water pump outlet is connected to a hollow water distribution plate through an outlet pipe. The hollow water distribution plate is horizontally arranged, and several water flow blockage monitors are installed on the bottom surface of the hollow water distribution plate.

2. The cooling tower water circulation system for cooling the spinning process of a screw extruder according to claim 1, characterized in that: The tower body has a rectangular cross-section. The water collection device includes a stainless steel cylinder with a rectangular cross-section. A support rail is provided on the front and rear sides of the inner wall of the tower body. The stainless steel cylinder is installed on the support rails on the front and rear sides respectively. The outer wall of the stainless steel cylinder is used to contact the inner wall of the tower body on the same side. A rectangular opening is provided on the right side of the tower body for horizontally pushing and pulling the stainless steel cylinder. A sealing door is provided at the rectangular opening. A door handle is provided on the outside of the sealing door. At least two sets of vertically arranged baffle water collection and air guiding structures are provided inside the stainless steel cylinder.

3. The cooling tower water circulation system for cooling the spinning process of a screw extruder according to claim 2, characterized in that: Each set of baffled water collection and air guiding structures includes an upper semi-circular pipe assembly and a lower semi-circular pipe assembly. The lower semi-circular pipe assembly includes several lower semi-circular pipes with their openings facing downwards. The several lower semi-circular pipes are evenly spaced along the left and right directions. The center line of each lower semi-circular pipe is along the front and back directions. The front and rear ends of each lower semi-circular pipe are fixedly connected to the front and rear side plates of the stainless steel cylinder, respectively. The upper semi-circular tube assembly includes several upper semi-circular tubes with their openings facing upwards. The several upper semi-circular tubes are evenly spaced along the left and right directions. The center line of each upper semi-circular tube is along the front and back directions. The front and rear ends of each upper semi-circular tube are fixedly connected to the front and rear side plates of the stainless steel cylinder, respectively. The left side of the leftmost upper semicircular tube of the upper semicircular tube assembly is fixedly connected to the inner wall of the left side plate of the stainless steel cylinder, and the right side of the rightmost upper semicircular tube of the upper semicircular tube assembly is fixedly connected to the inner wall of the right side plate of the stainless steel cylinder. Each lower semicircular tube is located directly below the two adjacent upper semicircular tubes, and a first airflow gap is formed between the outer circle of the lower semicircular tube and the outer circle of the upper semicircular tube. The lower semicircular tube at the bottom of the upper set of deflector-type water collection and air guiding structures is located directly above the two adjacent upper semicircular tubes. The inner circle of the lower semicircular tube of the upper set of deflector-type water collection and air guiding structures and the inner circle of the upper semicircular tube of the lower set of deflector-type water collection and air guiding structures form a second airflow gap.

4. The cooling tower water circulation system for cooling the spinning process of a screw extruder according to claim 3, characterized in that: A water-filtering and air-permeable screen is horizontally installed at the upper end of the stainless steel cylinder. The four sides of the water-filtering and air-permeable screen are fixedly connected to the inner wall of the stainless steel cylinder, and the bottom surface of the water-filtering and air-permeable screen is connected to the upper semi-circular pipe of the uppermost set of baffle water-collecting and air-guiding structures. Each of the upper semi-circular tubes has drainage holes at both ends at the bottom that allow for vertical drainage. The surface of each upper and lower semicircular tube is coated with nanomaterials to form a hydrophobic rough surface.

5. The cooling tower water circulation system for cooling the spinning process of a screw extruder according to claim 1, characterized in that: The hot water atomizing device includes a main water inlet pipe and several spray pipes. The spray pipes are evenly spaced in the tower body along the front-to-back direction. Each spray pipe is horizontally arranged in the left-to-right direction. The right end of all spray pipes passes through and extends out of the right side wall of the tower body. The main water inlet pipe is located on the right side of the outside of the tower body along the front-to-back direction. The right end of each spray pipe is connected to the left side of the main water inlet pipe. Each spray pipe has several atomizing nozzles arranged at left-to-right intervals at its bottom.

6. The cooling tower water circulation system for cooling the spinning process of a screw extruder according to claim 1, characterized in that: The secondary atomizing device is a rectangular grid plate. The inner wall of the tower is provided with support bars for placing the grid plate. The height of the grid plate is 20mm. Several square grid holes are evenly opened on the grid plate. The side length of each grid hole is 6-9mm. The distance between two adjacent grid holes, i.e. the thickness of the grid, is 0.6-0.8mm.

7. The cooling tower water circulation system for cooling the spinning process of a screw extruder according to claim 1, characterized in that: The water flow blockage monitor includes, from top to bottom, an inlet pipe connector, a transparent conical tube, a cover plate, and an outlet pipe connector. The transparent conical tube is smaller at the top and larger at the bottom. The upper end of the transparent conical tube is connected to the lower end of the inlet pipe connector. The cover plate is detachably connected to the lower port of the transparent conical tube. The upper end of the outlet pipe connector is connected to the center of the cover plate. The upper surface of the cover plate is provided with an elastic valve assembly located inside the transparent conical tube. The outside of the transparent conical tube is provided with scale lines along the generatrix direction for monitoring the position of the elastic valve assembly.

8. The cooling tower water circulation system for cooling the spinning process of a screw extruder according to claim 7, characterized in that: The resilient valve assembly includes a disc-shaped valve plate, which is aligned with and parallel to the cover plate. The bottom surface of the valve plate and the top surface of the cover plate are connected by several compression springs, which are arranged in a circumferential array along the center line of the cover plate. The bottom surface of the valve plate is provided with an upper positioning post located inside the upper end of the compression spring, and the top surface of the bottom plate is provided with a lower positioning post located inside the lower end of the compression spring.

9. The cooling tower water circulation system for cooling the spinning process of a screw extruder according to claim 7, characterized in that: The lower outer edge of the transparent conical tube is integrally provided with an annular plate. The top surface of the cover plate and the bottom surface of the annular plate are attached to each other and connected as one unit by several bolt assemblies arranged in a circular array. A sealing ring is provided between the top surface of the cover plate and the bottom surface of the annular plate. Both the outer circle of the cover plate and the outer circle of the annular plate are provided with corresponding upper and lower installation positioning mark grooves.

10. The cooling tower water circulation system for cooling the spinning process of a screw extruder according to claim 7, characterized in that: Several tension members are provided between the top surface of the cover plate and the inner wall of the transparent conical tube. All tension members are arranged in a circumferential array along the center line of the cover plate and are located outside the elastic valve assembly. Each tensioning component includes a first L-shaped plate and a second L-shaped plate. The lower end of the vertical section of the first L-shaped plate is fixedly connected to the top surface of the cover plate, and the upper end of the vertical section of the second L-shaped plate is fixedly connected to the inner wall of the transparent conical tube. A hook gap is formed between the upper horizontal section of the first L-shaped plate and the cover plate. The lower horizontal section of the second L-shaped plate extends into the hook gap. The bottom surface of the upper horizontal section of the first L-shaped plate and the top surface of the lower horizontal section of the second L-shaped plate are pressed together.

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