Water-soluble wax core depoling waste liquid treatment device and waste liquid treatment method

Abstract

The invention provides a water-soluble wax core depoling waste liquid treatment device and a waste liquid treatment method. The water-soluble wax core depoling waste liquid treatment device comprises a device body with a depoling groove, and the depoling groove is used for containing depoling waste liquid; a ventilation pipeline and a filter are arranged in the depoling groove, the ventilation pipeline is arranged at the bottom of the depoling groove, the filter is arranged above the ventilation pipeline, and the filter ascends and descends relative to the ventilation pipeline in the vertical direction. Through the arrangement of the ventilation pipeline and the filter in the depoling groove, the waste liquid treatment efficiency is improved, meanwhile, the utilization rate of the water-soluble wax mold core is improved, an environment-friendly treatment mode is achieved, manpower, material resources and financial resources are saved, and engineering practical experience is provided for treatment of other waste liquid.

Description

Technical Field

[0001] The invention relates to the technical field of investment casting, and in particular to a device and method for treating waste liquid from de-coring of a water-soluble wax core. Background Art

[0002] As the working environment of aircraft engine casting products becomes increasingly harsh, the precision requirements are becoming higher and higher, and the internal cavity structure of the products is becoming more and more complex. For such complex hollow structure castings, water-soluble wax is usually used to prepare water-soluble cores to form wax molds with complex cavity structures, which can reduce the difficulty of mold design. The water-soluble wax core is placed in the mold to inject the final wax material, and the wax mold wrapped with the water-soluble wax core is placed in a citric acid aqueous solution (pH <4, solution temperature is about 18°C) to remove the water-soluble core, and finally the wax mold body is obtained. The residues in the waste liquid after removing the wax core are mainly tiny fibers and organic solutions, etc., which will cause certain harm to the environment if directly discharged. Therefore, there is an urgent need for effective waste liquid treatment devices and methods. Summary of the invention

[0003] The main purpose of the present invention is to propose a water-soluble wax core de-coring waste liquid treatment device and a waste liquid treatment method. The arrangement of the ventilation pipe and the filter in the de-coring tank in the present invention improves the efficiency of waste liquid treatment, while increasing the application rate of water-soluble wax cores, realizing an environmentally friendly treatment method, saving manpower, material resources and financial resources, and also providing engineering practice experience for the treatment of other waste liquids.

[0004] In order to achieve the above objectives, the present invention provides the following technical solutions.

[0005] The first aspect of the present invention provides a device for treating waste liquid from core de-coring of water-soluble wax cores, the device comprising a device body having a core de-coring groove, the core de-coring groove being used to hold waste liquid from core de-coring; a ventilation duct and a filter are provided in the core de-coring groove, the ventilation duct is arranged at the bottom of the core de-coring groove, the filter is arranged above the ventilation duct, and the filter moves up and down in a vertical direction relative to the ventilation duct.

[0006] In some embodiments of the present invention, the filter comprises a filter plate having a plurality of filter holes.

[0007] The ventilation channel comprises an air pipe with a plurality of air holes, and the air holes on the ventilation pipe are connected to the filter holes on the filter.

[0008] In some embodiments of the present invention, the ventilation duct includes a plurality of air tubes distributed in a radial shape, the plurality of air tubes are interconnected, and each of the air tubes is provided with a plurality of air holes.

[0009] In some embodiments of the present invention, the ventilation duct can be telescopically arranged to adapt to the core stripping grooves of various shapes and specifications.

[0010] In some embodiments of the present invention, each of the trachea is independently retractable.

[0011] In some embodiments of the present invention, the ventilation duct and the filter are connected via a lifting frame, and a controller connected to the lifting frame is provided on the device body for driving the lifting frame to move vertically to synchronously drive the filter to move.

[0012] In some embodiments of the present invention, the device body is connected to a gas generating device, the gas generating device is connected to the ventilation pipe, the gas generating device is used to transport gas into the core removal tank, and introduce gas into the core removal waste liquid through the ventilation pipe.

[0013] In some embodiments of the present invention, the gas generating device comprises a gas compressor.

[0014] In some embodiments of the present invention, a gas heating device is provided between the device body and the gas generating device, and the gas heating device is used to heat the transported gas to ensure that the temperature of the gas input into the core removal tank is within the reaction temperature range of the core removal waste liquid and the waste liquid treatment agent.

[0015] In some embodiments of the present invention, the gas heating device includes a gas heater and a regulator control-connected to the gas heater, and the regulator is used to control the heating temperature of the gas heater.

[0016] In some embodiments of the present invention, a monitoring device is provided on the device body and is in communication with the gas heating device for real-time monitoring of the temperature and pH value of the core removal waste liquid in the core removal tank and sending information to the gas heating device.

[0017] In some embodiments of the present invention, the monitoring device includes a temperature detector and a pH value meter, and the temperature detector is communicatively connected to the gas heating device.

[0018] The second aspect of the present invention provides a waste liquid treatment method, which is based on the water-soluble wax core de-coring waste liquid treatment device described in the first aspect, and the waste liquid treatment method includes: adding a pH regulator to the de-coring waste liquid obtained after the water-soluble wax core is removed to adjust the pH value of the de-coring waste liquid to neutral; adding a waste liquid treatment agent to the de-coring waste liquid, and introducing gas through a ventilation pipe to allow the de-coring waste liquid to fully contact the waste liquid and the waste liquid treatment agent, so that the insoluble matter in the de-coring waste liquid quickly condenses and precipitates; using a filter to separate and remove the precipitate in a centralized manner to achieve solid-liquid separation.

[0019] In some embodiments of the present invention, the waste liquid treatment agent is a solution containing polyacrylamide.

[0020] In some embodiments of the present invention, the mass percentage of the polyacrylamide is 0.1% to 0.3%.

[0021] In some embodiments of the present invention, the amount of the waste liquid treating agent added is 5 mL to 10 mL per liter of the core removal waste liquid.

[0022] Compared with the prior art, the present invention achieves the following technical effects:

[0023] The provision of the ventilation duct and the filter in the core stripping tank in the present invention improves the efficiency of waste liquid treatment, while increasing the utilization rate of water-soluble wax cores, achieving an environmentally friendly treatment method, saving manpower, material and financial resources, and also providing engineering practice experience for the treatment of other waste liquids.

[0024] The selection of the waste liquid treatment agent in the present invention improves the efficiency of waste liquid treatment, while increasing the application rate of the water-soluble wax core, thereby realizing an environmentally friendly treatment process.

[0025] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented according to the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference numerals are used throughout the drawings to represent the same components. In the drawings:

[0027] Figure 1 A schematic structural diagram of a water-soluble wax core de-coring waste liquid treatment device according to one or more embodiments;

[0028] Figure 2 for Figure 1 A top view of a device for treating waste liquid from de-coring water-soluble wax cores;

[0029] Figure 3 for Figure 1 Top view of the water-soluble wax core de-coring waste liquid treatment device after the filter is removed.

[0030] Reference numerals:

[0031] 100. A water-soluble wax core removal waste liquid treatment device;

[0032] 10. Device body; 11. Core stripping tank; 12. Ventilation duct; 13. Filter;

[0033] 20. Gas generating device;

[0034] 30. Gas heating device;

[0035] 40. Monitoring device. DETAILED DESCRIPTION

[0036] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are exemplary only and are not intended to limit the scope of the present invention. In addition, in the following description, descriptions of known structures and technologies are omitted to avoid unnecessary confusion of the concept of the present invention.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which the present invention belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention; the terms "including" and "having" in the specification and claims of the present invention and the above-mentioned figure descriptions and any variations thereof are intended to cover non-exclusive inclusions.

[0038] In the description of the embodiments of the present invention, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present invention, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0039] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present invention. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0040] In the description of the embodiments of the present invention, the term "and / or" is only a description of the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B may represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0041] In the description of the embodiments of the present invention, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0042] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0043] As the structure of investment casting products becomes increasingly complex, it is impossible to open the wax mold in the conventional way when making wax molds. The wax mold demolding structure is complex, and the mold design and manufacturing are difficult and costly. In order to meet the needs of mass production, water-soluble wax cores are widely used. When the core stripping liquid in the core stripping tank dissolves a certain amount of water-soluble wax, H + When the concentration drops to a certain level, the water-soluble wax can no longer be dissolved, and the tank liquid needs to be replaced. Since the waste tank liquid contains insoluble matter (such as fine fibers), it cannot be directly discharged into the waste acid centralized treatment center for centralized treatment. How to deal with the waste tank liquid becomes a problem.

[0044] At present, the existing technology is to directly separate the waste liquid after the water-soluble wax core is removed from the core, and then treat the solid waste and the solution separately. The disadvantage of this method is that direct solid-liquid separation cannot completely separate the fibers and the organic solution, which will result in a lot of fine fibers remaining in the solution, which is not conducive to environmental protection. In addition, different equipment is used for water-soluble wax core removal and waste liquid treatment, which increases the processing flow and production costs.

[0045] The present invention provides a Figure 1 The water-soluble wax core de-core waste liquid treatment device shown in the figure is combined with Figure 2-3 It is introduced that the water-soluble wax core de-core waste liquid treatment device 100 includes a device body 10 with a de-core groove 11, and the de-core groove 11 is used to hold the de-core waste liquid; a ventilation pipe 12 and a filter 13 are arranged in the de-core groove 11, the ventilation pipe 12 is arranged at the bottom of the de-core groove 11, and the filter 13 is arranged above the ventilation pipe 12, and the filter moves up and down in the vertical direction relative to the ventilation pipe 12.

[0046] In an embodiment of the present invention, a ventilation pipe 12 for introducing gas is arranged in the core removal tank 11, so that the waste liquid treatment agent is in full contact with the waste liquid, so that insoluble substances such as fibers in the waste liquid can be quickly condensed and precipitated. In addition, the filter 13 that can move up and down in the vertical direction is arranged to realize the centralized separation and removal of the precipitate.

[0047] Combination Figure 2 and Figure 3 As shown, the filter 13 includes a filter plate with multiple filter holes, and the ventilation channel 12 includes an air pipe with multiple air holes. The air holes on the ventilation pipe 12 are connected to the filter holes on the filter 13, so that the gas can be smoothly introduced into the waste liquid to achieve flocculation and precipitation of insoluble matter.

[0048] In the embodiment of the present invention, the filter plate is adapted to the core removal tank 11, which can be understood as the edge of the filter plate abuts against the tank wall of the core removal tank 11 for efficient filtration of waste liquid without affecting the lifting movement of the filter plate.

[0049] In the embodiment of the present invention, the ventilation duct 12 includes a plurality of air pipes distributed in a radial shape, the plurality of air pipes are interconnected, and each of the air pipes is provided with a plurality of air holes.

[0050] In some embodiments of the present invention, multiple air pipes arranged radially are connected in series after being evenly perforated, and are integrally connected to a gas generating device 20, such as an air compressor, so that compressed air can be more evenly introduced into the core removal waste liquid through the multiple air pipes.

[0051] In some embodiments of the present invention, one end of any one of the plurality of air pipes can be detachably connected to the gas generating device 20, so that the ventilation pipe 12 is connected as a whole to the gas generating device 20. Moreover, the detachable connection makes the operation more convenient, and can be disassembled and replaced according to actual needs.

[0052] In the embodiment of the present invention, the ventilation duct 12 can be telescopically arranged to adapt to core stripping grooves 11 of various shapes and specifications. Therefore, the shape and size of the core stripping groove 11 can be set according to actual needs and is not limited to cylindrical or square.

[0053] In some embodiments of the present invention, each air tube is independently retractable, for example, a telescopic rod may be used and holes may be punched in the rod wall to serve as the air tube.

[0054] In an embodiment of the present invention, the ventilation duct 12 and the filter 13 are connected via a lifting frame, and a controller connected to the lifting frame is provided on the device body 10 for driving the lifting frame to move up and down in a vertical direction to synchronously drive the filter to move, thereby achieving flexible regulation of the rise or fall of the filter 13 to meet more needs.

[0055] Continue to see Figure 1As shown, the device body 10 is externally connected to a gas generating device 20, and the gas generating device 20 is connected to a ventilation pipe 12, and the gas generating device 20 is used to transport gas into the core removal tank 11, and introduce gas into the core removal waste liquid through the ventilation pipe 12. In the process of the bubbles rising and growing, the surrounding liquid is driven to form a liquid flow, so that the waste liquid is fully contacted with the waste liquid treatment agent, and the insoluble matter in the waste liquid is quickly flocculated and precipitated.

[0056] In an embodiment of the present invention, a valve is provided on the gas generating device 20. The valve is opened to deliver gas and adjust the gas flow rate, and the valve is closed to stop delivering gas.

[0057] In the embodiment of the present invention, the gas generating device 20 may be, but is not limited to, a gas compressor, such as an air compressor, to generate gas and transport the gas to the core stripping tank 11 .

[0058] Continue to see Figure 1 As shown, a gas heating device 30 is provided between the device body 10 and the gas generating device 20. Since the temperature of the gas discharged by the gas generating device 20 is in the range of 5°C to 13°C, the temperature of the core removal waste liquid may be lower than the reaction temperature requirement during the start-up of the bubble stirring, thereby causing incomplete reaction of the core removal waste liquid. The gas heating device 30 is used to heat the delivered gas as required to ensure that the temperature of the gas input into the core removal tank 11 is within the reaction temperature range of the core removal waste liquid and the waste liquid treating agent, thereby accelerating the precipitation of insoluble matter in the waste liquid.

[0059] In an embodiment of the present invention, the gas heating device 30 includes a gas heater and a regulator connected to the gas heater for controlling the heating temperature of the gas heater.

[0060] In some embodiments of the present invention, the regulator is in communication with the monitoring device to control the heating temperature of the gas heater according to the received information.

[0061] In some embodiments of the present invention, the gas heating device 30 can be arranged around the pipeline, such as the heater can be a heating coil or a heating belt arranged around the outside of the pipeline, and the heating temperature of the heating coil or the heating belt is controlled by a regulator. Of course, the gas heating device 30 in the embodiment of the present invention can also be other heating devices to achieve heating of the gas in the pipeline.

[0062] Continue to see Figure 1As shown, a monitoring device 40 is provided on the device body 10, and the monitoring device 40 is communicatively connected with the gas heating device 30. The monitoring device 40 is used for real-time monitoring of the temperature and pH value of the core removal waste liquid in the core removal tank 11, and sending information to the gas heating device 30. The gas heating device 30 is used for adjusting the heating temperature according to the received information to ensure that the temperature of the gas input into the core removal tank 11 is within the reaction temperature range of the core removal waste liquid.

[0063] In an embodiment of the present invention, the monitoring device 40 includes a temperature detector and a pH value meter. The temperature detector is connected in communication with the gas heating device 30 to transmit temperature data to the gas heating device 30 in real time.

[0064] In an embodiment of the present invention, a temperature control device is arranged on the device body 10 along the circumference of the core removal groove 11, and the temperature control device is communicated with the monitoring device 40 for controlling the temperature of the core removal waste liquid in the core removal groove 11 to ensure that the temperature of the core removal waste liquid is maintained within the required temperature range.

[0065] In some embodiments of the present invention, the temperature control device may be a heating belt or a heating strip disposed around the core stripping groove 11 .

[0066] It is worth mentioning that the water-soluble wax core de-coring waste liquid treatment device in the embodiment of the present invention is an integrated device for wax core removal and de-coring waste liquid treatment. During the wax core removal process, the de-coring tank 11 is used to hold the de-coring liquid. The device body 10 is externally connected to the gas generating device 20, and a gas heating device 30 is arranged between the device body 10 and the gas generating device 20. The gas generating device 30 is used to transport gas into the de-coring tank. The gas heating device 30 is used to heat the transported gas to ensure that the temperature of the gas input into the de-coring tank 11 is within the fluctuation range of the temperature of the de-coring liquid; a monitoring device 40 is arranged on the device body 10, and the monitoring device 40 is communicatively connected with the gas heating device 30. The monitoring device 40 is used to monitor the temperature and pH value of the de-coring liquid in the de-coring tank 11 in real time, and send information to the gas heating device 30. The gas heating device 30 is used to adjust the heating temperature according to the information to ensure that the temperature of the gas input into the de-coring tank 11 is within the fluctuation range of the temperature of the de-coring liquid.

[0067] In an embodiment of the present invention, during the wax core removal process, a gas heating device 30 is provided between the device body 10 and the gas generating device 20 to heat the transported gas to ensure that the temperature of the gas input into the core stripping tank 11 is within the fluctuation range of the temperature of the core stripping liquid; and a monitoring device 40 is further provided to communicate with the gas heating device 30 to monitor the temperature and pH value of the core stripping liquid in the core stripping tank 11 in real time, and send information to the gas heating device 30. The gas heating device 30 can adjust the gas heating temperature according to the information to ensure that the temperature of the gas input into the core stripping tank 11 is within the fluctuation range of the temperature of the core stripping liquid, and finally the temperature of the core stripping liquid in the core stripping tank 11 fluctuates less during use, and there will be no out-of-tolerance situation, so the size of the prepared wax mold is more stable and controllable.

[0068] In contrast, the existing technology uses a temperature control method for the core-removing liquid, which is to automatically stop ultrasonic emission when a temperature error is detected through a thermocouple, and then cool the core-removing liquid by a cooling water pipe outside the core-removing tank. This is a dynamic regulation that can only ensure that the average liquid temperature during the core-removing period meets the wax mold storage temperature requirement. However, in actual applications, there is a situation where the core-removing liquid in the tank is overheated and the wax mold is taken out after core-removing, and there is a risk of the wax mold size being out of tolerance.

[0069] In an embodiment of the present invention, after the wax core is removed, the core removal liquid in the core removal tank 11 becomes a core removal waste liquid. At this time, the water-soluble wax core core removal waste liquid treatment device is used as a core removal waste liquid treatment device to treat the core removal waste liquid without changing the equipment. Specifically, the core removal waste liquid can be temperature-controlled by a monitoring device and a temperature control device to ensure that the temperature of the core removal waste liquid is maintained within the required temperature range, and then an appropriate amount of pH regulator is added to the core removal waste liquid to adjust the pH value of the core removal waste liquid to neutral. At this time, the gas heating device 30 can also be used to pre-heat the gas to be transported to the core removal waste liquid to ensure that the temperature of the gas input into the core removal waste liquid is maintained within the reaction temperature range of the core removal waste liquid. A waste liquid treatment agent is added to the core removal waste liquid, and gas is introduced through a ventilation pipe to fully contact the core removal waste liquid with the waste liquid treatment agent, and the insoluble matter in the core removal waste liquid is quickly condensed and precipitated. After the insoluble gel precipitation is completed, the filter is started, and the filter will rise in the vertical direction (the height direction of the core removal tank) to separate and carry out the precipitate to achieve solid-liquid separation. Afterwards, the precipitate and solution after solid-liquid separation are treated by environmentally friendly processes respectively.

[0070] The present invention also provides a waste liquid treatment method. The key is that the treatment method is based on the above-mentioned water-soluble wax core de-coring waste liquid treatment device 100, which can make the insoluble fibers in the water-soluble core de-coring waste liquid visibly coagulate and precipitate, and can easily perform solid-liquid separation, which not only reduces the generation of hazardous waste, but also saves static sedimentation time, effectively saving manpower, material resources and financial resources.

[0071] Solid fibers are relatively small and easily suspended, making them difficult to directly separate from the solid and the liquid. In an embodiment of the present invention, a waste liquid treatment agent is added to the water-soluble wax dissolving waste liquid and combined with bubble disturbance for coagulation and precipitation treatment, so that most of the colloidal impurities in the waste liquid are physically stabilized. The destabilized colloidal particles collide with each other in the de-coring tank, coagulate, and finally form flocs that can be removed by precipitation. This makes it easier to separate the solid and the liquid, thereby reducing the generation of hazardous waste.

[0072] In the embodiment of the present invention, the waste liquid treatment method of the present invention is carried out according to the following steps.

[0073] (1) Prepare waste liquid treatment agent.

[0074] In an embodiment of the present invention, the waste liquid treatment agent is a solution containing polyacrylamide.

[0075] In some embodiments of the present invention, the mass percentage of polyacrylamide is 0.1% to 0.3%. For example, the mass percentage of polyacrylamide can be one of 0.1%, 0.12%, 0.15%, 0.16%, 0.18%, 0.2%, 0.22%, 0.25%, 0.26%, 0.28%, 0.3%, or any value satisfying the above range.

[0076] In an embodiment of the present invention, a polyacrylamide (PAM) solution with a concentration of 0.1% to 0.3% is prepared, and PAM is added to water and stirred for 40 to 60 minutes to obtain a colloidal PAM aqueous solution as a waste liquid treatment agent for core removal waste liquid.

[0077] (2) Pretreatment of core removal waste liquid.

[0078] In an embodiment of the present invention, after the water-soluble wax core is removed, a core-removing waste liquid is obtained, and the temperature of the core-removing waste liquid is adjusted to room temperature. For example, a monitoring device and a temperature control device are used to control the temperature of the core-removing waste liquid to ensure that the temperature of the core-removing waste liquid is maintained within a desired temperature range, and then an appropriate amount of pH adjuster is added to the core-removing waste liquid to adjust the pH value of the core-removing waste liquid to neutral.

[0079] In the embodiment of the present invention, the pH adjusting agent can be an alkaline solution or an alkaline solution, the purpose of which is to adjust the pH value of the core removal waste liquid to a neutral range. The alkaline solution can be sodium hydroxide, potassium hydroxide, triethylamine, etc., and the acidic solution can be hydrochloric acid, etc., which can be set according to actual needs.

[0080] It is worth mentioning that the temperature of the core-removing waste liquid can be adjusted to room temperature, such as within the range of 20°C to 30°C. Of course, it can also be adjusted to the required temperature according to actual conditions, such as higher than 30°C, without specific limitation. When the required temperature of the core-removing waste liquid is high, or in order to achieve a better waste liquid treatment effect, the waste liquid needs to be maintained within a certain temperature range during the waste liquid treatment process, the temperature of the core-removing waste liquid can be controlled by a temperature control device, such as heating the core-removing waste liquid. At the same time, the gas heating device 30 can also be used to heat the transported gas to ensure that the temperature of the gas input into the core-removing tank 11 is within the temperature fluctuation range of the core-removing waste liquid. Specifically, the monitoring device 40 is used to monitor the temperature and pH value of the core-removing waste liquid in the core-removing tank 11 in real time, and send information to the temperature control device and the gas heating device 30. The temperature control device is used to maintain the temperature of the core-removing waste liquid within the required temperature range, and the gas heating device 30 is used to control the temperature of the heated gas according to the received information to ensure that the temperature of the gas input into the core-removing tank 11 is within the reaction temperature range of the core-removing waste liquid.

[0081] (3) Insoluble matter condenses and precipitates.

[0082] In an embodiment of the present invention, a waste liquid treating agent is added to the core removal waste liquid, and gas is introduced through a ventilation pipe to fully contact the core removal waste liquid with the waste liquid treating agent, so that insoluble matter in the core removal waste liquid is rapidly condensed and precipitated.

[0083] In an embodiment of the present invention, a capacity scale line is provided in the core removal tank 11, and the prepared PAM aqueous solution is added to the core removal waste liquid at a ratio of 5 mL to 10 mL of the waste liquid treatment agent per liter of the core removal waste liquid. Exemplarily, the amount of the waste liquid treatment agent added per liter of the core removal waste liquid is one of 5 mL, 6 mL, 7 mL, 8 mL, 9 mL, 10 mL or any value that satisfies the above range.

[0084] In an embodiment of the present invention, before or after, preferably before, adding the waste liquid treatment agent to the core degassing waste liquid, the gas generating device 20 (such as an air compressor) is turned on, and a large number of bubbles are blown into through the ventilation holes of the ventilation pipe 12 so that the core degassing waste liquid is fully in contact with the waste liquid treatment agent, and the destabilized colloidal particles collide and agglomerate with each other in the core degassing tank 11. After a period of time, the gas generating device 20 is turned off, and when left to stand, the rapid agglomeration and precipitation of fine insoluble fibers can be seen visibly by the naked eye.

[0085] It is worth mentioning that the waste liquid treatment agent of the present invention can be but is not limited to polyacrylamide (PAM), and other types of reagents can also be selected, such as polyaluminum chloride, polyaluminum sulfate, polyferric chloride, alum, etc. PAM is used as a flocculant, which is non-toxic, inexpensive, has a smaller dosage, a faster flocculation speed, and is less affected by the pH value and temperature of the waste liquid.

[0086] (4) After the insoluble gel precipitation is completed, the filter is started. Specifically, the lifting frame is controlled to move upward in the vertical direction to synchronously drive the filter to move, so as to separate and carry out the precipitate in a centralized manner, thereby achieving solid-liquid separation.

[0087] (5) The precipitate and solution after solid-liquid separation are treated by environmentally friendly processes respectively.

[0088] Unless otherwise defined, the technical terms used in the following examples have the same meanings as those generally understood by those skilled in the art to which the present invention belongs. The experimental reagents used in the following examples, unless otherwise specified, are all conventional biochemical reagents; the raw materials, instruments and equipment used in the following examples, etc., can all be purchased on the market or can be obtained by existing methods; the amounts of the experimental reagents, unless otherwise specified, are the amounts of reagents used in conventional experimental operations; the experimental methods, unless otherwise specified, are all conventional methods.

[0089] Example 1

[0090] A method for treating the waste liquid obtained after removing the water-soluble wax core, the method is based on Figure 1-3 The water-soluble wax core de-core waste liquid treatment device shown in the figure, the de-core waste liquid treatment method is as follows:

[0091] (1) Prepare waste liquid treatment agent.

[0092] The waste liquid treatment agent is a polyacrylamide solution containing 0.15% by mass. PAM is added into water and fully stirred for 50 minutes to obtain a colloidal PAM aqueous solution, which is used as a waste liquid treatment agent for core removal waste liquid.

[0093] (2) Pretreatment of core removal waste liquid.

[0094] The temperature of the core-removing waste liquid is adjusted to room temperature 25°C, and then an appropriate amount of pH regulator sodium hydroxide is added to the core-removing waste liquid to adjust the pH value of the core-removing waste liquid to neutral. The air compressor and the gas heating device 30 are turned on, and a large amount of bubbles with a temperature of about 25°C are blown in through the vent holes of the ventilation pipe 12.

[0095] (3) Insoluble matter condenses and precipitates.

[0096] Add a waste liquid treatment agent to the core-removing waste liquid at a ratio of 8 mL of the waste liquid treatment agent per liter of the core-removing waste liquid, and continuously blow a large number of bubbles through the ventilation holes of the ventilation pipe 12 to allow the core-removing waste liquid to fully contact with the waste liquid treatment agent. The destabilized colloidal particles collide and agglomerate with each other in the core-removing tank 11. After a period of time, turn off the gas generating device 20. When left standing, the rapid agglomeration and precipitation of fine insoluble fibers can be seen visibly by the naked eye.

[0097] (4) After the insoluble gel precipitation is completed, the filter is started to separate and remove the precipitate to achieve solid-liquid separation.

[0098] (5) The precipitate and solution after solid-liquid separation are treated by environmentally friendly processes respectively.

[0099] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention. In particular, as long as there is no structural conflict, the various technical features mentioned in each embodiment can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

Claims

1. A water-soluble wax core de-core waste liquid treatment device, characterized in that: The device comprises a core-removing groove, wherein the core-removing groove is used to hold the core-removing waste liquid; A ventilation pipe and a filter are arranged in the core stripping tank. The ventilation pipe is arranged at the bottom of the core stripping tank, and the filter is arranged above the ventilation pipe. The filter moves up and down relative to the ventilation pipe in a vertical direction.

2. The water-soluble wax core de-core waste liquid treatment device according to claim 1, characterized in that: The filter comprises a filter plate having a plurality of filter holes, The ventilation channel comprises an air pipe with a plurality of air holes, and the air holes on the ventilation pipe are connected to the filter holes on the filter.

3. The water-soluble wax core de-core waste liquid treatment device according to claim 2, characterized in that: The ventilation duct includes a plurality of air pipes distributed in a radial shape, the plurality of air pipes are interconnected, and each of the air pipes is provided with a plurality of air holes.

4. The water-soluble wax core de-core waste liquid treatment device according to claim 1, characterized in that: The ventilation duct can be telescopically arranged to adapt to the core stripping grooves of various shapes and specifications; Preferably, each of the air tubes is independently retractable.

5. The water-soluble wax core de-core waste liquid treatment device according to claim 1, characterized in that: The ventilation duct is connected to the filter via a lifting frame, and a controller connected to the lifting frame is arranged on the device body for driving the lifting frame to move vertically to synchronously drive the filter to move.

6. The water-soluble wax core de-core waste liquid treatment device according to claim 1, characterized in that: The device body is connected to a gas generating device, the gas generating device is connected to the ventilation pipeline, the gas generating device is used to transport gas into the core removal tank, and introduce gas into the core removal waste liquid through the ventilation pipeline; Preferably, the gas generating device comprises a gas compressor.

7. The water-soluble wax core de-core waste liquid treatment device according to claim 6, characterized in that: A gas heating device is provided between the device body and the gas generating device, and the gas heating device is used to heat the delivered gas to ensure that the temperature of the gas input into the core removal tank is within the reaction temperature range of the core removal waste liquid and the waste liquid treating agent; Preferably, the gas heating device comprises a gas heater and a regulator control-connected to the gas heater, wherein the regulator is used to control the heating temperature of the gas heater.

8. The water-soluble wax core de-core waste liquid treatment device according to claim 7, characterized in that: The device body is provided with a monitoring device which is in communication with the gas heating device and is used to monitor the temperature and pH value of the core removal waste liquid in the core removal tank in real time and send information to the gas heating device; Preferably, the monitoring device comprises a temperature detector and a pH value measuring instrument, and the temperature detector is communicatively connected with the gas heating device; Preferably, a temperature control device is provided on the device body along the circumference of the core removal groove, and the temperature control device is communicated with the monitoring device and is used to control the temperature of the core removal waste liquid in the core removal groove to ensure that the temperature of the core removal waste liquid is maintained within the required temperature range.

9. A method for treating waste liquid, characterized in that: The treatment method is based on the water-soluble wax core de-core waste liquid treatment device according to any one of claims 1 to 8, and the waste liquid treatment method comprises: Adding a pH regulator to the core-removing waste liquid obtained after the water-soluble wax core is removed to adjust the pH value of the core-removing waste liquid to neutral; Adding a waste liquid treating agent to the core-removing waste liquid, and introducing gas through a ventilation pipe to fully contact the core-removing waste liquid with the waste liquid treating agent, so that insoluble matter in the core-removing waste liquid is rapidly condensed and precipitated; The filter is used to separate and remove the sediment to achieve solid-liquid separation.

10. The waste liquid treatment method according to claim 9, characterized in that: The waste liquid treatment agent is a solution containing polyacrylamide; Preferably, the mass percentage of the polyacrylamide is 0.1% to 0.3%; Preferably, the amount of the waste liquid treating agent added is 5 mL to 10 mL per liter of the core removal waste liquid.

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