Extruder circulating water deionization anti-blocking device and waste heat utilization system and method

Abstract

The invention relates to the field of plastic extrusion granulation and forming machines, and particularly discloses an extruder circulating water ion removal anti-blocking device, a waste heat utilization system and a waste heat utilization method. Waste heat generated in the machine barrel cooling process is utilized to generate distilled water in the evaporation condensation module, the distilled water enters the cooling water tank, circulating water in the cooling water tank does not contain calcium, magnesium, iron and other ions, and the problems of scaling and blocking of a barrel cooling flow channel are thoroughly solved. According to the device, waste heat of superheated steam is effectively recycled, the quantity demanded of external cooling water is reduced, energy is saved, practice proves that the device, system and method effectively utilize waste heat, the problems of scaling and blocking of a cylinder in the fields of plastic extrusion granulation and forming machines are thoroughly solved, and certain expected economic benefits are achieved.

Description

Technical Field

[0001] The invention relates to the field of plastic extrusion granulation and molding machines, and specifically discloses an extruder circulating water deionization and anti-blocking device, a waste heat utilization system and a method. Background Art

[0002] An extruder is a piece of equipment used for plastic processing. It heats and melts plastic raw materials (such as granules, powders or recycled materials) and extrude them through a mold of a specific shape under a certain pressure and temperature to produce various plastic products. It is used in the production of pipes, profiles, plates, pipelines and other products. During the extrusion process, the barrel needs to be heated. The purpose of heating the barrel is to heat the plastic raw materials to a sufficient temperature so that they enter a flowing state, which is convenient for the screw to push and mix. Reasonable heating control can ensure that the material reaches the appropriate degree of melting and avoid product quality problems caused by overheating or uneven heating. Therefore, when the barrel is equipped with a thermocouple, a liquid flow cavity is also required to be provided inside. Circulating water is pumped into the liquid flow cavity, and the circulating water is vaporized into superheated steam in the liquid flow cavity. In order to achieve the purpose of uniformly controlling the temperature of the barrel, the liquid flow cavity often needs to control the cross-sectional size. The circulating liquid flows in the liquid flow cavity and evaporates to form superheated steam. In this process, salt accumulation with the main components of calcium, silicon, magnesium and iron is formed in the liquid flow cavity. Since the barrel is made of metal and the cross-sectional size of the liquid flow cavity is not large, there are many liquid flow cavities surrounding the barrel per unit volume, which makes it difficult to clean the blockage, and the extruder barrel is particularly expensive. Summary of the invention

[0003] In view of the prior art, the first aspect of the present invention proposes an extruder circulating water deionization and anti-blocking device, which is used to reuse the circulating water of the extruder and remove calcium, magnesium, silicon and iron ions, so as to completely solve the blockage problem of the liquid flow cavity in the extruder barrel, including:

[0004] An evaporation condensation module, containing an evaporation liquid inside, the evaporation condensation module comprising a heat exchange component, at least a portion of the heat exchange component is immersed in the evaporation liquid, and a hollow portion is provided inside the heat exchange component, and the hollow portion is used to accommodate the superheated steam delivered by the extruder;

[0005] A cooling water supply module, the cooling water supply module comprising a cooling water circulation pump, the water inlet pipe of the cooling water circulation pump extends into the cooling water tank, and the cooling water circulation pump is used to provide circulating water to the extruder;

[0006] A condensing mechanism, the condensing mechanism being used to condense conventional steam generated by the evaporative liquid;

[0007] An overflow pipe is provided between the cooling water supply module and the evaporation condensation module;

[0008] In the first state, the superheated steam enters the hollow part, and the superheated steam condenses to form first condensed water; the evaporative liquid evaporates to form the conventional steam, and the conventional steam is condensed through the metal cover to form second condensed water; the first condensed water and the second condensed water are combined into the circulating water of the cooling water supply module;

[0009] In the first state, the liquid level of the circulating water in the cooling water tank rises, and part of the circulating water enters the evaporation condensation module through the overflow pipe and merges into the evaporation liquid.

[0010] In some embodiments of the first aspect of the present invention, the evaporation-condensation module also includes an evaporation box, one end of which is provided with an opening, the heat exchange component and the evaporating liquid are placed together in the evaporation box, the heat exchange component introduces the extruder superheated steam via a superheated steam pipe, and the superheated steam pipe is connected to the heat exchange component along the steam flow direction.

[0011] In some embodiments of the first aspect of the present invention, an opening is provided at one end of the cooling water tank, and the metal cover is arranged above the evaporator box and the opening of the cooling water tank, and in the vertical direction, the projection area of ​​the evaporator box is within the projection area of ​​the metal cover; the metal cover gradually approaches the cooling water tank in the vertical direction from the evaporator box to the cooling water tank, and the overflow pipe connects the cooling water tank and the evaporator box.

[0012] In the first state, the evaporative liquid evaporates to form steam, and the steam contacts the metal cover to generate the second condensed water. The second condensed water flows along the metal cover toward the cooling water tank and then drips into the cooling water tank.

[0013] In some embodiments of the first aspect of the present invention, the heat exchange component is a regular or irregular hollow polygonal box, or the heat exchange component is a hollow cylinder, or the heat exchange component is a metal coil.

[0014] In some embodiments of the first aspect of the present invention, a plurality of fins are fixedly provided on the wall surface of the heat exchange component.

[0015] In some embodiments of the first aspect of the present invention, the heat exchange assembly is detachably connected to the evaporator.

[0016] In some embodiments of the first aspect of the present invention, the extruder circulating water deionization and anti-blocking device includes a first microcontroller module and a first solenoid valve; the evaporator has a water inlet pipe, and the second solenoid valve is arranged at the water inlet pipe; a liquid level device is arranged in the evaporator, and the liquid level device is connected to the signal of the first microcontroller module, and the first microcontroller module is used to receive the signal of the liquid level device to control the opening and closing of the first solenoid valve.

[0017] In some embodiments of the first aspect of the present invention, a cooling coil is provided in the cooling water tank, and the cooling coil is used to reduce the temperature of the cooling water tank.

[0018] In some embodiments of the first aspect of the present invention, the cooling water tank is provided with a temperature sensor, and the water inlet of the cooling coil is provided with a second solenoid valve; the temperature sensor is connected to the first microcontrol module signal, and the first microcontrol module is used to receive the temperature sensor signal to control the opening and closing of the second solenoid valve.

[0019] The second aspect of the present invention proposes a system for utilizing waste heat from circulating water of an extruder according to the first aspect, comprising:

[0020] Any of the extruder circulating water deionization and anti-blocking devices described in the first aspect, wherein the cooling water circulating pump outlet pipe is provided with a third solenoid valve;

[0021] An extruder, the extruder comprises an extruder barrel and a second micro-control module, the extruder barrel is provided with a temperature control sensor, the temperature control sensor is connected to the second micro-control module signal, the second micro-control module is used to control the opening and closing of the third solenoid valve,

[0022] In the first state, the second microcontroller module controls the third solenoid valve to open, and the cooling water circulation pump pumps circulating water to the extruder barrel. The circulating water is evaporated into superheated steam by the extruder barrel, and the superheated steam enters the hollow portion, and heat is transferred between the superheated steam and the evaporating liquid.

[0023] The superheated steam condenses to form the first condensed water, the evaporative liquid evaporates to form conventional steam, the conventional steam is condensed through the metal cover to form the second condensed water, the first condensed water and the second condensed water are jointly merged into the circulating water of the cooling water supply module to reduce the calcium, magnesium and other ion contents of the circulating water, thereby solving the blockage problem of the circulating water flow cavity in the extruder barrel.

[0024] In the first state, the circulating water level in the cooling water supply module rises, and part of the circulating water enters the evaporation condensation module through the overflow pipe and merges into the evaporation liquid.

[0025] The third aspect of the present invention provides a method for utilizing waste heat from circulating water of an extruder, using any of the extruder circulating water deionization and anti-blocking devices described in the first aspect, comprising:

[0026] Step 1: The superheated steam from the extruder enters the hollow portion of the heat exchange component, and the superheated steam exchanges heat with the evaporating liquid;

[0027] Step 2: The superheated steam is condensed to form first condensed water, the evaporative liquid is evaporated through heat exchange to form conventional steam, the conventional steam contacts the metal cover and condenses to form second condensed water, the first condensed water and the second condensed water are combined into the cooling water supply module, and the liquid level in the cooling water supply module rises;

[0028] Step 3: The liquid level in the cooling water supply module rises to a predetermined value and overflows to the evaporation and condensation module, and the cooling water circulation pump pumps circulating water to the extruder.

[0029] In the present invention, the "first microcontroller" and the "second microcontroller" may be logic circuits, industrial PLC modules, MCU (single-chip microcomputer), etc.

[0030] In the present invention, the extruder can be called an extruder, or a plastic extruder, or a twin-screw extruder granulator.

[0031] Advantages of the present invention:

[0032] The device of the present invention uses the waste heat generated during the barrel cooling process to produce distilled water in the evaporation condensation module through the cooperation of the evaporation condensation module, the heat exchange component, the cooling water supply module, and the condensation mechanism. The distilled water enters the cooling water tank. The circulating water in the cooling water tank is distilled water that does not contain calcium, magnesium, iron and other ions, which completely solves the scaling and clogging problems of the barrel cooling flow channel. The device of the present invention effectively recycles the waste heat of superheated steam, reduces the demand for external circulating water (distilled water), and saves energy. Practice has proved that the device, system and method effectively utilize waste heat, completely solve the scaling and clogging problems of the barrel in the field of plastic extrusion granulation and molding machines, and has certain expected economic benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 The figure shows a schematic diagram of the connection of the pipeline equipment of the extruder cooling system of the present invention;

[0034] Figure 2 The first structural diagram of the extruder circulating water deionization and anti-blocking device of the present invention is shown;

[0035] Figure 3 The second structural diagram of the extruder circulating water deionization and anti-blocking device of the present invention is shown from a first viewing angle;

[0036] Figure 4 The second structural diagram of the extruder circulating water deionization and anti-blocking device of the present invention is shown from a second viewing angle;

[0037] Figure 5 A schematic diagram showing the generation of the first condensed water and the second condensed water of the present invention is shown;

[0038] Figure 6 The heat exchange component of the present invention is shown as a box appearance structure diagram;

[0039] Figure 7 Show Figure 6 AA cross-sectional view of the heat exchange component shown;

[0040] Figure 8 It is a first angle view of the appearance structure diagram of multiple boxes connected in series according to the present invention;

[0041] Fig. 9 A second angle view of the appearance structure diagram of a plurality of boxes connected in series according to the present invention is shown;

[0042] Fig.10 2. shows a cross-sectional view of the extruder barrel;

[0043] 1. Evaporation and condensation module; 11. Heat exchange component; 111. Hollow part; 112. Fins; 113. Box; 114. Metal coil; 12. Evaporation box; 13. Superheated steam pipe; 131. Flange; 14. Water inlet pipe; 15. First solenoid valve; 16. Liquid level device; 17. Steam water tank water supply pipe; 2. Cooling water supply module; 21. Cooling water circulation pump; 211. Cooling water circulation pump water inlet pipe; 212. Cooling water circulation pump water outlet pipe; 213. Third Solenoid valve; 214, cooling water circulation pump return pipe; 2141, throttle valve; 22, cooling water tank; 221, cooling coil; 222, temperature sensor; 223, second solenoid valve; 23, circulating water intake pipe; 3, metal cover; 31, overflow pipe; 4, extruder barrel; 41, liquid flow chamber; 42, cooling water inlet; 43, extrusion channel; 44, superheated steam outlet; 5, first micro-control module; 6, base; 7, drain valve; 8, second micro-control module. DETAILED DESCRIPTION

[0044] The present invention is further described below in conjunction with specific embodiments. It is worth noting that these embodiments are only used to illustrate the present invention and are not intended to limit the present invention in any way. Improvements and adjustments made by technicians according to the present invention in practical applications still fall within the scope of protection of the present invention.

[0045] See also Figures 1 to 5 The present invention proposes an extruder circulating water deionization and anti-blocking device, which is used to reuse the circulating water of the extruder and remove calcium, magnesium, silicon and other ions to solve the blockage problem of the liquid flow cavity 41 in the barrel 4 of the extruder. Further, the waste heat of superheated steam is used to produce circulating water, and the concentration of calcium, magnesium and iron ions in the water is reduced by this method. The device includes:

[0046] The evaporation condensation module 1 contains evaporation liquid, which is water. The evaporation condensation module 1 includes a heat exchange component 11 and an evaporation box 12. One end of the evaporation box 12 is open and contains evaporation liquid. At least a part of the heat exchange component 11 is immersed in the evaporation liquid. A hollow portion 111 is provided in the heat exchange component 11. The superheated steam pipe 13 is connected to the heat exchange component 11. The superheated steam pipe 13 is used to transport superheated steam to the hollow portion 111. For example, the superheated steam generated by the extruder barrel 4 is transported to the heat exchange component 11 by the superheated steam pipe 13 as shown by the arrow G. The hollow portion 111 in the heat exchange component 11 is used to accommodate the superheated steam transported by the extruder.

[0047] The superheated steam in the hollow portion 111 of the heat exchange component 11 and the evaporative liquid in contact with the heat exchange component 11 undergo heat conduction, and the superheated steam condenses to form first condensed water, which flows into the cooling water supply module 2, that is, into the cooling water tank 22, from the direction of the arrow F1.

[0048] The cooling water supply module 2 includes a circulating pump 21, and a circulating pump water inlet pipe 211 extends into the cooling water tank 22 to extract circulating water in the cooling water tank 22 as shown in the direction of arrow F4. The circulating pump 21 is used to provide circulating water to the extruder barrel 4 as shown in the direction of arrow F4a.

[0049] The evaporating liquid evaporates under the action of heat conduction to form conventional steam, which contacts the metal cover 3 from the direction of the arrow G1. One side of the metal cover 3 contacts the atmospheric environment, and the other side contacts the conventional steam. The conventional steam condenses to produce second condensed water, which adheres to the metal cover 3.

[0050] like Figure 5 As shown, Figure 5 Up and down arrows are used to indicate the vertical direction. An opening is provided at one end of the cooling water tank 22. The metal cover 3 is placed above the openings of the evaporator box 12 and the cooling water tank 22. In the vertical direction, the projection area of ​​the evaporator box 12 is within the projection area of ​​the metal cover 3. The metal cover 3 gradually approaches the cooling water tank 22 in the vertical direction from the evaporator box 12 to the cooling water tank 22. The condensed water attached to the metal cover 3 gathers above the cooling water tank 22 and drips into the cooling water tank 22, such as the F2 direction.

[0051] The overflow pipe 31 connects the cooling water tank 22 and the evaporation tank 12 .

[0052] In the first state, that is, when the device is in operation, superheated steam enters the hollow portion 111, the superheated steam condenses to form first condensed water, the evaporative liquid evaporates to form conventional steam, the conventional steam condenses through the metal cover 3 to form second condensed water, the first condensed water and the second condensed water are jointly merged into the circulating water of the cooling water supply module 2, and further merged into the cooling water tank 22.

[0053] In the first state, the liquid level of the circulating water in the cooling water tank 22 rises, and part of the circulating water enters the evaporation condensation module 1 through the overflow pipe 31, and further enters the evaporation box 12, as shown in the direction of arrow F3. This part of the circulating water merges into the evaporation liquid, bringing the salt ions such as calcium, magnesium, silicon and iron in the cooling water tank 22 into the evaporation box 12.

[0054] In some optional embodiments, the heat exchange component 11 introduces superheated steam from the extruder via the superheated steam pipe 13 , and the superheated steam pipe 13 connects several heat exchange components 11 along the steam flow direction.

[0055] like Figures 6 to 9 Preferably, in order to further increase the heat exchange efficiency, the heat exchange component 11 is a regular or irregular hollow polygonal box 113, or the heat exchange component 11 is a hollow cylinder, or the heat exchange component 11 is a metal coil 114.

[0056] Preferably, a plurality of fins 112 are fixedly provided on the wall surface of the heat exchange component 11 .

[0057] In some optional embodiments, the heat exchange component 11 is detachably connected to the evaporator box 12. For example, the metal coil 114 and the evaporator box 12 are connected by a flange 131. When there are too many calcium, magnesium, silicon, and iron ions in the box, salt accumulates on the surface of the metal coil. The flange 131 can be disassembled to facilitate cleaning of the internal environment of the evaporator box 12.

[0058] In some optional embodiments, a cooling coil 221 is placed in the cooling water tank 22. The cooling coil 221 is used to lower the temperature of the cooling water tank 22. The water inlet of the cooling coil 221 is connected to a pressurized water source, such as municipal tap water. The water flow in the cooling coil 221 is controlled by a second solenoid valve 223. The second solenoid valve 223 is connected to the signal of the first microcontrol module 5. A temperature sensor 222 is also placed in the cooling water tank 22. The temperature sensor 222 is connected to the signal of the first microcontrol module 5 and transmits a signal to the first microcontrol module 5 to control the opening and closing of the second solenoid valve 223, thereby controlling the water flow in the cooling coil 221. The direction of the water flow in the cooling coil 221 is such as the F6 direction.

[0059] In some embodiments, the extruder circulating water deionization and anti-blocking device also includes a first micro-control module 5 and a first solenoid valve 15. The evaporator 12 has a water inlet pipe 14, and the second solenoid valve 223 is arranged at the water inlet pipe 14; a liquid level device 16 is arranged in the evaporator 12, and the liquid level device 16 is connected to the signal of the first micro-control module 5. The first micro-control module 5 is used to receive the signal of the liquid level device 16 to control the opening and closing of the first solenoid valve 15, and then control the pressurized water source such as tap water to enter the evaporator 12, so that the liquid level in the evaporator 12 is not too low, as shown in the direction of arrow F7, and the evaporator 12 is replenished with water, so that during the circulation process, the amount of circulating water in the cooling water tank 22 increases, the conductivity of the circulating water is reduced, and the blockage problem of the liquid flow cavity 41 in the extruder barrel 4 is solved. The system utilizes waste heat and produces certain economic benefits.

[0060] In some embodiments, the circulating pump 21 runs for a long time, and the circulating pump outlet pipe 212 is also connected to the circulating pump return pipe 214. The circulating pump return pipe 214 is provided with a return valve 2141, and the return valve 2141 can be a ball valve, a butterfly valve, etc. In the first state, the circulating pump 21 pumps circulating water to the extruder, as shown by the arrow F4a, and the other part of the circulating liquid returns to the cooling water tank 22 from the circulating pump return pipe 214, as shown by the direction F4b, to prevent excessive pressure when the circulating pump outlet pipe 212 is blocked, resulting in damage to the equipment.

[0061] In some embodiments, the periphery of the wall panel of the evaporator box 12 is also covered with a heat-insulating material, which may be asbestos, ceramic fiber, graphite felt, aluminum silicate, aerogel insulation wool and polymer foam resin insulation wool.

[0062] In some embodiments, the evaporation tank 12 and the cooling water tank 22 are also provided with drain valves, wherein the drain valve provided in the evaporation tank 12 is used to discharge high calcium and magnesium plasma water 7, such as the direction of arrow F5.

[0063] like Figure 1 As shown, the present invention provides an extruder circulating water waste heat utilization system, including, the extruder circulating water deionization and anti-blocking device described in any of the embodiments of the present invention, the circulating pump 21 outlet pipe is installed with a third solenoid valve 213, which is used to control the flow rate of circulating water pumped by the circulating pump 21 to the extruder, and the third solenoid valve 213 is connected to the second micro-control module 8 signal,

[0064] The second micro-control module 8 is also connected to the temperature control sensor signal embedded in the extruder barrel 4. The second micro-control module 8 controls the opening and closing of the third solenoid valve 213 according to the temperature control sensor signal.

[0065] In the first state, the second micro-control module 8 controls the third solenoid valve 213 to open, and the circulating pump 21 pumps circulating water to the extruder barrel 4. The circulating water passes through the liquid flow cavity 41 of the extruder barrel 4, absorbs heat, and evaporates into superheated steam. The superheated steam enters the hollow part 111 from the superheated steam pipe 13. In the hollow part 111, the superheated steam and the evaporating liquid conduct heat.

[0066] The superheated steam condenses to form the first condensed water, which enters the cooling water tank 22 from the arrow F1. The evaporative liquid evaporates to form normal steam, which is condensed through the metal cover 3 to form the second condensed water. The first condensed water and the second condensed water are merged into the circulating water in the cooling water tank 22. The circulating water level rises and is merged into the evaporation tank 12 from the overflow pipe 31, so as to reduce the amount of calcium, magnesium and other plasma in the circulating water.

[0067] In the first state, the circulating water level in the cooling water supply module 2 rises, and part of the circulating water enters the evaporation condensation module 1 through the overflow pipe 31 and merges into the evaporation liquid.

[0068] The circulation pump 21 draws circulating water and pumps it to the liquid flow chamber 41 of the extruder barrel 4. After the reuse cycle, the silicon, magnesium, calcium and iron ions in the circulating water are significantly reduced, reducing the possibility of blockage of the liquid flow chamber 41 of the extruder barrel 4. At the same time, distilled water is continuously regenerated in this process, reducing the energy consumption generated by replacing distilled water and realizing system heat recovery.

[0069] This device effectively recycles the waste heat of superheated steam and saves energy. Practice has proved that this device and system effectively utilize waste heat, completely solving the scaling and clogging problems of plastic extrusion granulation and molding machines (extruder barrels), and producing a steady supply of distilled water.

[0070] The present invention also discloses a method for removing ions from circulating water of an extruder, that is, removing calcium, magnesium and other ions from circulating water of an extruder, that is, using waste heat of superheated steam generated during the cooling process of a barrel of an extruder to remove calcium, magnesium and other ions from circulating water, including:

[0071] Step 1: The superheated steam from the extruder enters the hollow portion 111 of the heat exchange component 11 from the superheated steam outlet 44, and the superheated steam exchanges heat with the evaporating liquid;

[0072] Step 2: The superheated steam is condensed to form the first condensed water, and the evaporative liquid is evaporated through heat exchange to form conventional steam, and the conventional steam contacts the metal cover 3 and condenses to form the second condensed water, and the first condensed water and the second condensed water are combined into the cooling water supply module 2, and the liquid level in the cooling water supply module 2 rises;

[0073] Step 3: The liquid level in the cooling water supply module 2 rises to a predetermined value and overflows to the evaporation and condensation module 1 , and the circulation pump 21 delivers circulating water to the cooling water inlet 42 of the extruder barrel 4 .

[0074] In the cycle of steps 1 to 3, the waste heat of superheated steam produces the first condensed water and the second condensed water, which are then reduced through the overflow pipe to reduce the content of calcium, magnesium, silicon and iron ions in the cooling water tank 22, leaving the calcium and magnesium ions in the evaporation tank 12. The waste heat of superheated steam is effectively recycled in the entire circulation process method, reducing the demand for external cooling water and saving energy. Practice has proved that the device, system and method can effectively utilize waste heat, completely solve the problems of scaling and clogging of the barrel in the field of plastic extrusion granulation and molding machines, and have certain expected economic benefits.

[0075] The method of the present invention has been described through preferred embodiments, and relevant personnel can obviously modify or appropriately change and combine the methods and applications herein within the content, spirit and scope of the present invention to implement and apply the technology of the present invention. Those skilled in the art can refer to the content of this article and appropriately improve the process parameters. It is particularly important to point out that all similar replacements and modifications are obvious to those skilled in the art, and they are all considered to be included in the present invention.

Claims

1. An extruder circulating water deionization and anti-blocking device, used for reusing the extruder circulating water and removing salt ions, characterized in that: include: An evaporation condensation module (1) contains an evaporation liquid; the evaporation condensation module (1) comprises a heat exchange component (11), at least a portion of the heat exchange component (11) is immersed in the evaporation liquid, and a hollow portion (111) is provided in the heat exchange component (11), and the hollow portion (111) is used to contain superheated steam delivered by the extruder; A cooling water supply module (2), the cooling water supply module (2) comprising a cooling water circulation pump (21), a water inlet pipe of the cooling water circulation pump (21) extending into a cooling water tank (22), the cooling water circulation pump (21) being used to provide circulating water to the extruder; A metal cover (3), wherein the metal cover (3) is used to condense conventional steam generated by the evaporative liquid; An overflow pipe (31) is provided between the cooling water supply module (2) and the evaporation condensation module (1); In a first state, the superheated steam enters the hollow portion (111), and the superheated steam condenses to form first condensed water; the evaporative liquid evaporates to form conventional steam, and the conventional steam condenses through the metal cover (3) to form second condensed water; the first condensed water and the second condensed water are combined into the circulating water of the cooling water supply module (2); In the first state, the liquid level of the circulating water in the cooling water tank (22) rises, and part of the circulating water enters the evaporation condensation module (1) through the overflow pipe (31) and merges into the evaporation liquid.

2. The extruder circulating water deionization and anti-blocking device according to claim 1, characterized in that: The evaporation-condensation module (1) further comprises an evaporation box (12), one end of which is provided with an opening, the heat exchange component (11) and the evaporation liquid are placed together in the evaporation box (12), the heat exchange component (11) introduces the superheated steam of the extruder via a superheated steam pipe (13), and the superheated steam pipe (13) connects a plurality of the heat exchange components (11) along the steam flow direction.

3. The extruder circulating water deionization and anti-blocking device according to claim 1, characterized in that: An opening is provided at one end of the cooling water tank (22); the metal cover (3) is arranged above the evaporation tank (12) and the opening of the cooling water tank (22); in the vertical direction, the projection area of ​​the evaporation tank (12) is within the projection area of ​​the metal cover (3); the metal cover (3) gradually approaches the cooling water tank (22) in the vertical direction from the evaporation tank (12) to the cooling water tank (22); the overflow pipe (31) connects the cooling water tank (22) and the evaporation tank (12); In the first state, the evaporative liquid evaporates to form steam, and the steam contacts the metal cover (3) to generate the second condensed water. The second condensed water flows along the metal cover (3) toward the cooling water tank (22) and then drips into the cooling water tank (22).

4. The extruder circulating water deionization and anti-blocking device according to claim 1, characterized in that: The heat exchange component (11) is a regular or irregular hollow polygonal box (113), or the heat exchange component (11) is a hollow cylinder, or the heat exchange component (11) is a metal coil (114).

5. The extruder circulating water deionization and anti-blocking device according to claim 4, characterized in that: A plurality of fins (112) are fixedly provided on the wall surface of the heat exchange component (11).

6. The extruder circulating water deionization and anti-blocking device according to any one of claims 1 to 5, characterized in that: The extruder circulating water deionization and anti-blocking device comprises a first micro-control module (5) and a first solenoid valve (15); the evaporation box (12) has a water inlet pipe (14), and the second solenoid valve (223) is arranged at the water inlet pipe (14); a liquid level device (16) is arranged in the evaporation box (12), and the liquid level device (16) is connected to the first micro-control module (5) by signal, and the first micro-control module (5) is used to receive the signal of the liquid level device (16) to control the opening and closing of the first solenoid valve (15).

7. The extruder circulating water deionization and anti-blocking device according to any one of claims 1 to 6, characterized in that: A cooling coil (221) is arranged in the cooling water tank (22), and the cooling coil (221) is used to reduce the temperature of the cooling water tank (22), and / or the cooling coil (221) is detachably connected to the cooling water tank (22).

8. The extruder circulating water deionization and anti-blocking device according to any one of claims 6 or 7, characterized in that: The cooling water tank (22) is provided with a temperature sensor (222), and the water inlet of the cooling coil (221) is provided with a second solenoid valve (223); the temperature sensor (222) is connected to the first microcontrol module (5) signal, and the first microcontrol module (5) is used to receive the temperature sensor (222) signal to control the opening and closing of the second solenoid valve (223).

9. An extruder waste heat utilization system, characterized in that: include, The extruder circulating water deionization and anti-blocking device according to any one of claims 1 to 8, wherein the cooling water circulating pump outlet pipe (212) is provided with a third solenoid valve (213); An extruder, the extruder comprising an extruder barrel (4) and a second micro-control module (8), the extruder barrel (4) being provided with a temperature control sensor, the temperature control sensor being connected to the second micro-control module (8) by signal, the second micro-control module (8) being used to control the opening and closing of the third solenoid valve (213), In the first state, the second microcontroller module (8) controls the third solenoid valve (213) to open, and the cooling water circulation pump (21) pumps circulating water to the extruder barrel (4). The circulating water is evaporated into superheated steam by the extruder barrel (4). The superheated steam enters the hollow portion (111), and heat conduction occurs between the superheated steam and the evaporating liquid. The superheated steam condenses to form the first condensed water; the evaporative liquid evaporates to form normal steam, the normal steam is condensed through the metal cover (3) to form the second condensed water, the first condensed water and the second condensed water are jointly introduced into the circulating water of the cooling water supply module (2) to reduce the amount of calcium, magnesium and silicon ions in the circulating water; In the first state, the circulating water level in the cooling water supply module (2) rises, and part of the circulating water enters the evaporation condensation module (1) through the overflow pipe (31) and merges into the evaporation liquid.

10. A method for utilizing waste heat from circulating water of an extruder, using the deionizing and anti-blocking device for circulating water of an extruder according to any one of claims 1 to 8, characterized in that: include, Step 1: The superheated steam from the extruder enters the hollow portion (111) of the heat exchange component (11), and the superheated steam exchanges heat with the evaporating liquid; Step 2: the superheated steam is condensed to form first condensed water, the evaporative liquid is evaporated through heat exchange to form conventional steam, the conventional steam contacts the metal cover (3) and condenses to form second condensed water, the first condensed water and the second condensed water are jointly fed into the cooling water supply module (2), and the liquid level in the cooling water supply module (2) rises; Step 3: The liquid level in the cooling water supply module (2) rises to a predetermined value and overflows into the evaporation and condensation module (1), and the cooling water circulation pump (21) pumps circulating water to the extruder.

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