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

Abstract

The application provides a water-soluble wax core stripping waste liquid treatment device and a waste liquid treatment method. The water-soluble wax core stripping waste liquid treatment device comprises a device body provided with a stripping groove for containing stripping waste liquid. An air pipe and a filter are arranged in the stripping groove. The air pipe is arranged at the bottom of the stripping groove, and the filter is arranged above the air pipe and vertically moves relative to the air pipe. The arrangement of the air pipe and the filter in the stripping groove improves the efficiency of waste liquid treatment, increases the application rate of water-soluble wax cores, realizes an environmentally-friendly treatment method, saves manpower, material resources and financial resources, and provides engineering practical experience for the treatment of other waste liquids.

Description

Technical Field

[0001] This invention relates to the field of investment casting technology, specifically to a device and method for treating waste liquid from removing water-soluble wax cores. Background Technology

[0002] As the working environment of aero-engine castings becomes increasingly harsh, precision requirements become higher, and internal cavity structures become more complex, water-soluble wax is typically used to prepare water-soluble cores for these complex hollow castings. These cores are then used to form wax models of complex cavity structures, reducing the difficulty of mold design. The water-soluble wax core is placed in the mold, and the final wax material is injected. The wax model encasing the water-soluble wax core is then placed in a citric acid aqueous solution (pH < 4, solution temperature approximately 18°C) to remove the water-soluble core, ultimately yielding the wax model body. The waste liquid after wax core removal mainly contains microfibers and organic solvents. Direct discharge of this waste liquid poses a certain degree of environmental harm; therefore, effective waste liquid treatment devices and methods are urgently needed. Summary of the Invention

[0003] The main objective of this invention is to propose a waste liquid treatment device and method for removing water-soluble wax cores. The installation of air pipes and filters in the core removal tank improves the efficiency of waste liquid treatment, increases the application rate of water-soluble wax cores, achieves an environmentally friendly treatment method, saves manpower, material resources and financial resources, and also provides engineering practice experience for the treatment of other waste liquids.

[0004] To achieve the above objectives, the present invention provides the following technical solutions.

[0005] A first aspect of the present invention provides a water-soluble wax core stripping waste liquid treatment device, which includes a device body having a stripping tank for holding the stripping waste liquid; an air vent and a filter are provided in the stripping tank, the air vent is arranged at the bottom of the stripping tank, the filter is arranged above the air vent, and the filter moves vertically up and down relative to the air vent.

[0006] In some embodiments of the present invention, the filter includes a filter plate having a plurality of filter holes. The ventilation duct includes a duct with multiple air holes, and the air holes on the ventilation duct are connected to the filter holes on the filter.

[0007] In some embodiments of the present invention, the ventilation conduit includes a plurality of radially distributed air pipes, which are interconnected, and each air pipe has a plurality of air holes.

[0008] In some embodiments of the invention, the ventilation duct is telescopically configurable to accommodate core-removing grooves of various shapes and sizes.

[0009] In some embodiments of the present invention, each of the tracheas is independently retractable.

[0010] In some embodiments of the present invention, the ventilation pipe is connected to the filter via a lifting frame, and the device body is provided with a controller that is connected to the lifting frame for driving the lifting frame to move up and down in the vertical direction to synchronously drive the filter to move.

[0011] In some embodiments of the present invention, the device body is externally connected to a gas generating device, the gas generating device is connected to the ventilation pipe, the gas generating device is used to deliver gas into the core removal tank, and introduce gas into the core removal waste liquid through the ventilation pipe.

[0012] In some embodiments of the present invention, the gas generating device includes a gas compressor.

[0013] In some embodiments of the present invention, a gas heating device is provided between the device body and the gas generating device. 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.

[0014] In some embodiments of the present invention, the gas heating device includes a gas heater and a regulator connected to the gas heater for controlling the heating temperature of the gas heater.

[0015] In some embodiments of the present invention, the device body is provided with a monitoring device that is communicatively connected to the gas heating device, for real-time monitoring of the temperature and pH value of the decoking waste liquid in the decoking tank, and sending information to the gas heating device.

[0016] In some embodiments of the present invention, the monitoring device includes a temperature detector and a pH meter, wherein the temperature detector is communicatively connected to the gas heating device.

[0017] A second aspect of the present invention provides a waste liquid treatment method based on the water-soluble wax core removal waste liquid treatment device described in the first aspect. The waste liquid treatment method includes: adding a pH adjuster to the waste liquid obtained after removing the water-soluble wax core to adjust the pH value of the waste liquid to neutral; adding a waste liquid treatment agent to the waste liquid and introducing gas through a ventilation pipe to ensure sufficient contact between the waste liquid and the waste liquid treatment agent, causing insoluble substances in the waste liquid to rapidly coagulate and precipitate; and using a filter to concentrate and separate the precipitate, thereby achieving solid-liquid separation.

[0018] In some embodiments of the present invention, the waste liquid treatment agent is a solution containing polyacrylamide.

[0019] In some embodiments of the present invention, the mass percentage of the polyacrylamide is 0.1% to 0.3%.

[0020] In some embodiments of the present invention, the amount of waste liquid treatment agent added to each liter of the decoking waste liquid is 5 mL to 10 mL.

[0021] Compared with the prior art, the present invention achieves the following technical effects: The installation of ventilation pipes and filters in the core stripping tank in this invention improves the efficiency of waste liquid treatment, increases the application rate of water-soluble wax cores, realizes an environmentally friendly treatment method, saves manpower, material resources and financial resources, and also provides engineering practice experience for the treatment of other waste liquids.

[0022] The selection of waste liquid treatment agent in this invention improves the efficiency of waste liquid treatment and increases the application rate of water-soluble wax cores, thus achieving an environmentally friendly treatment process.

[0023] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it in accordance with the contents of the specification, and in order to make the above and other objects, features and advantages of the present invention more apparent and understandable, specific embodiments of the present invention are described below. Attached Figure Description

[0024] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 This is a schematic diagram of a water-soluble wax core removal waste liquid treatment device according to one or more embodiments; Figure 2 for Figure 1 Top view of the waste liquid treatment device for water-soluble wax core removal; Figure 3 for Figure 1 A top view of the waste liquid treatment device for removing the filter after removing the water-soluble wax core.

[0025] Figure label: 100. Water-soluble wax core removal waste liquid treatment device; 10. Device body; 11. Core stripping tank; 12. Ventilation pipe; 13. Filter; 20. Gas generating device; 30. Gas heating device; 40. Monitoring device. Detailed Implementation

[0026] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, it should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the invention; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the invention, are intended to cover non-exclusive inclusion.

[0028] In the description of the embodiments of this invention, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this invention, "multiple" means two or more, unless otherwise explicitly defined.

[0029] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of the invention. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0030] In the description of the embodiments of this invention, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0031] In the description of the embodiments of the present invention, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0032] In the description of the embodiments of the present invention, unless otherwise explicitly specified and limited, the technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of the present invention according to the specific circumstances.

[0033] As the structures of investment casting products become increasingly complex, conventional mold-making methods are no longer feasible. The wax pattern release structure is complex, and mold design and manufacturing are difficult and costly. To meet the demands of mass production, water-soluble wax cores are widely used. When a certain amount of water-soluble wax dissolves in the core-removing liquid in the core-removing tank, H... + When the concentration drops to a certain level, it can no longer dissolve water-soluble wax, at which point the tank solution needs to be replaced. Because the waste tank solution contains insoluble substances (such as fine fibers), it cannot be directly discharged into a centralized waste acid treatment facility for centralized treatment, making the disposal of the waste tank solution a problem.

[0034] Current technology involves directly separating the solid and liquid components of the waste liquid after water-soluble wax core removal, followed by separate treatment of the solid waste and the solution. The drawbacks of this method are: direct solid-liquid separation cannot completely separate the fibers and organic solution, resulting in the presence of numerous fine fibers in the solution, which is environmentally unfriendly. Furthermore, the use of different equipment for water-soluble wax core removal and waste liquid treatment increases the processing steps and production costs.

[0035] This invention provides a method such as Figure 1 The water-soluble wax core removal waste liquid treatment device shown is combined with Figure 2-3 The water-soluble wax core stripping waste liquid treatment device 100 includes a device body 10 with a stripping tank 11 for holding the stripping waste liquid; a ventilation pipe 12 and a filter 13 are provided in the stripping tank 11, the ventilation pipe 12 is arranged at the bottom of the stripping tank 11, 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.

[0036] In an embodiment of the present invention, a ventilation pipe 12 for introducing gas is provided in the core removal tank 11, so that the waste liquid treatment agent and the waste liquid are in full contact, thereby achieving rapid coagulation and precipitation of insoluble substances such as fibers in the waste liquid. In addition, the filter 13, which can move up and down in the vertical direction, is provided to achieve centralized separation and removal of the precipitate.

[0037] Combination Figure 2 and Figure 3As shown, the filter 13 includes a filter plate with multiple filter holes, and the air pipe 12 includes an air pipe with multiple air holes. The air holes on the air pipe 12 are connected to the filter holes on the filter 13, thereby enabling the smooth introduction of gas into the waste liquid to achieve flocculation and sedimentation of insoluble substances.

[0038] In an embodiment of the present invention, the filter plate is adapted to the core-removing tank 11, which can be understood as the edge of the filter plate abutting and fitting against the tank wall of the core-removing tank 11 for efficient filtration of waste liquid without affecting the lifting and lowering movement of the filter plate.

[0039] In an embodiment of the present invention, the ventilation duct 12 includes a plurality of radially distributed air pipes, which are interconnected and each air pipe has a plurality of air holes.

[0040] In some embodiments of the present invention, multiple air pipes arranged radially are connected in series after being perforated evenly on the air pipes, and are externally connected to a gas generating device 20, such as an air compressor, so as to enable compressed air to be introduced into the core removal waste liquid more evenly through multiple air pipes.

[0041] In some embodiments of the present invention, one end of any one of the multiple air tubes can be detachably connected to the gas generating device 20, thereby connecting the entire ventilation pipe 12 to the gas generating device 20. Furthermore, this detachable connection method makes operation more convenient, allowing for disassembly and replacement as needed.

[0042] In embodiments of the present invention, the ventilation duct 12 is telescopically configurable to adapt to core-removing grooves 11 of various shapes and sizes. Therefore, the shape and size of the core-removing groove 11 can be configured according to actual needs and is not limited to cylindrical or square shapes.

[0043] In some embodiments of the present invention, each trachea is independently telescopic, for example, a telescopic rod with holes punched in its wall can be used as a trachea.

[0044] In an embodiment of the present invention, the ventilation pipe 12 and the filter 13 are connected by a lifting frame. The device body 10 is provided with a controller that is connected to the lifting frame for driving the lifting frame to move up and down in the vertical direction to synchronously drive the filter to move, thereby realizing flexible adjustment of the filter 13 to rise or fall, and thus meeting more needs.

[0045] See also Figure 1 As shown, the main body 10 of the device is externally connected to a gas generating device 20, and the gas generating device 20 is connected to a ventilation pipe 12. The gas generating device 20 is used to deliver gas into the core removal tank 11 and introduce gas into the core removal waste liquid through the ventilation pipe 12. During the rising and growing of the bubbles, they drive the surrounding liquid to form a liquid flow, so that the waste liquid and the waste liquid treatment agent can come into full contact, and the insoluble matter in the waste liquid can be quickly flocculated and precipitated.

[0046] In an embodiment of the present invention, the gas generating device 20 is provided with a valve, which is opened to deliver gas and regulate the gas flow rate, and closed to stop delivering gas.

[0047] In embodiments 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 deliver it to the core stripping tank 11.

[0048] See also Figure 1 As shown, a gas heating device 30 is installed between the device body 10 and the gas generating device 20. Since the temperature of the gas discharged from the gas generating device 20 is in the range of 5℃ to 13℃, the temperature of the decoupling waste liquid may be lower than the required reaction temperature during the bubble stirring start-up, resulting in incomplete reaction of the decoupling waste liquid. The gas heating device 30 is used to heat the gas being transported as needed to ensure that the temperature of the gas input into the decoupling tank 11 is within the reaction temperature range of the decoupling waste liquid and the waste liquid treatment agent, thereby accelerating the precipitation of insoluble substances in the waste liquid.

[0049] 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.

[0050] In some embodiments of the present invention, the controller is communicatively connected to the monitoring device and controls the heating temperature of the gas heater based on the received information.

[0051] In some embodiments of the present invention, the gas heating device 30 can be arranged around the pipeline. For example, the heater can be a heating coil or heating strip arranged around the outside of the pipeline, and the heating temperature of the heating coil or heating strip can be controlled by a regulator. Of course, the gas heating device 30 in the embodiments of the present invention can also be other heating devices to heat the gas in the pipeline.

[0052] See also Figure 1 As shown, a monitoring device 40 is provided on the main body 10 of the device. The monitoring device 40 is communicatively connected to the gas heating device 30. The monitoring device 40 is used to monitor the temperature and pH value of the decoction waste liquid in the decoction 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 received information to ensure that the temperature of the gas input into the decoction tank 11 is within the reaction temperature range of the decoction waste liquid.

[0053] In an embodiment of the present invention, the monitoring device 40 includes a temperature detector and a pH meter. The temperature detector is communicatively connected to the gas heating device 30 to transmit temperature data to the gas heating device 30 in real time.

[0054] In an embodiment of the present invention, a temperature control device is provided on the device body 10 along the circumference of the core removal tank 11. The temperature control device is communicatively connected to the monitoring device 40 and is used to control the temperature of the core removal waste liquid in the core removal tank 11 to ensure that the temperature of the core removal waste liquid is maintained within the required temperature range.

[0055] In some embodiments of the present invention, the temperature control device may be a heating belt or heating bar arranged around the core removal groove 11.

[0056] It is worth mentioning that, in this embodiment of the invention, the water-soluble wax core removal waste liquid treatment device is an integrated device for wax core removal and waste liquid treatment. During the wax core removal process, the removal tank 11 is used to hold the removal liquid. The device body 10 is externally connected to a gas generating device 20, and a gas heating device 30 is provided between the device body 10 and the gas generating device 20. The gas generating device 20 is used to supply gas into the removal tank, and the gas heating device 30 is used to heat the supplied gas to ensure that the temperature of the gas input into the removal tank 11 is within the fluctuation range of the removal liquid temperature. A monitoring device 40 is provided on the device body 10, and the monitoring device 40 is communicatively connected to the gas heating device 30. The monitoring device 40 is used to monitor the temperature and pH value of the removal liquid in the removal 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 removal tank 11 is within the fluctuation range of the removal liquid temperature.

[0057] In an embodiment of the present invention, during the wax core removal process, a gas heating device 30 is installed between the device body 10 and the gas generating device 20 to heat the transported gas, ensuring that the gas temperature input into the core removal tank 11 is within the fluctuation range of the core removal liquid temperature. Furthermore, a monitoring device 40 is installed in communication with the gas heating device 30 to monitor the temperature and pH value of the core removal liquid in the core removal 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 removal tank 11 is within the fluctuation range of the core removal liquid temperature. Ultimately, the temperature fluctuation range of the core removal liquid in the core removal tank 11 is smaller during use, and there will be no out-of-tolerance situation. Therefore, the size of the prepared wax mold is more stable and controllable.

[0058] In contrast, existing technologies control the temperature of the core-removing fluid by automatically stopping ultrasonic emission when a temperature deviation is detected by thermocouples, and then cooling the fluid through cooling water pipes outside the core-removing tank. This is a dynamic control method that can only ensure that the average liquid temperature during core removal meets the storage temperature requirements for wax molds. However, in practical applications, there is a risk that the wax mold may be removed after core removal if the core-removing fluid in the tank is at an excessively high temperature, which could lead to dimensional deviations in the wax mold.

[0059] In an embodiment of the present invention, after the wax core removal is completed, the wax core removal liquid in the wax core removal tank 11 becomes wax core removal waste liquid. At this time, the water-soluble wax core wax core removal waste liquid treatment device is used as a wax core removal waste liquid treatment device to treat the wax core removal waste liquid without the need to replace the equipment. Specifically, the temperature of the wax core removal waste liquid can be controlled by a monitoring device and a temperature control device to ensure that the temperature of the wax core removal waste liquid is maintained within the required temperature range. Then, an appropriate amount of pH adjuster is added to the wax core removal waste liquid to adjust the pH value of the wax core removal waste liquid to neutral. At this time, the gas heating device 30 can also be used to preheat the gas to be delivered to the wax core removal waste liquid to ensure that the temperature of the gas input into the wax core removal waste liquid is maintained within the reaction temperature range of the wax core removal waste liquid. A waste liquid treatment agent is added to the wax core removal waste liquid, and gas is introduced through a ventilation pipe to ensure that the wax core removal waste liquid and the waste liquid treatment agent are in full contact, and the insoluble matter in the wax core removal waste liquid quickly coagulates and precipitates. After the insoluble matter gels and precipitates, the filter is activated. The filter will move upward in the vertical direction (the height direction of the wax core removal tank) to concentrate and separate the precipitate, thereby achieving solid-liquid separation. The precipitate and solution after solid-liquid separation were then treated using environmentally friendly processes.

[0060] The present invention also provides a waste liquid treatment method, the key of which is that the treatment method is based on the above-mentioned water-soluble wax core decoction waste liquid treatment device 100, which can make the insoluble fibers in the water-soluble wax core decoction 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 the settling time, effectively saving manpower, material resources and financial resources.

[0061] Solid fibers are relatively small and easily suspended, making them difficult to directly separate into solid and liquid. In the embodiments of the present invention, a waste liquid treatment agent is added to the water-soluble wax dissolution waste liquid and combined with bubble disturbance to carry out coagulation and sedimentation treatment. This stabilizes most of the colloidal impurities in the waste liquid. The destabilized colloidal particles collide and agglomerate with each other in the decoction tank, finally forming flocs that can be removed by sedimentation. This makes solid-liquid separation treatment easier and reduces the generation of hazardous waste.

[0062] In embodiments of the present invention, the waste liquid treatment method of the present invention is carried out according to the following steps.

[0063] (1) Prepare waste liquid treatment agent.

[0064] In an embodiment of the present invention, the waste liquid treatment agent is a solution containing polyacrylamide.

[0065] In some embodiments of the present invention, the mass percentage of polyacrylamide is 0.1% to 0.3%. Exemplarily, 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%, or 0.3%, or any value satisfying the above range.

[0066] In an embodiment of the present invention, a polyacrylamide (PAM) solution with a concentration of 0.1% to 0.3% is prepared. After adding PAM to water, the mixture is stirred thoroughly for 40 min to 60 min to obtain a gel-like PAM aqueous solution, which is used as a waste liquid treatment agent for core stripping waste liquid.

[0067] (2) Pretreatment of waste liquid from decoupling.

[0068] In an embodiment of the present invention, after the water-soluble wax core is removed, a core removal waste liquid is obtained. The temperature of the core removal waste liquid is adjusted to room temperature. For example, a monitoring device and a temperature control device are used to regulate the temperature of the core removal waste liquid to ensure that the temperature of the core removal waste liquid is maintained within the required temperature range. Then, an appropriate amount of pH adjuster is added to the core removal waste liquid to adjust the pH value of the core removal waste liquid to neutral.

[0069] In embodiments of the present invention, the pH adjuster can be an alkaline solution or an acidic solution, the purpose of which is to adjust the pH value of the decoupling waste liquid to the neutral range. Alkaline solutions can be, for example, sodium hydroxide, potassium hydroxide, triethylamine, etc., while acidic solutions can be, for example, hydrochloric acid, etc., and can be set according to actual needs.

[0070] It is worth mentioning that the temperature of the core-stripping waste liquid can be adjusted to room temperature, such as within the range of 20℃ to 30℃. Of course, it can also be adjusted to the required temperature according to the actual situation, such as above 30℃, without specific limitation. When the required temperature of the core-stripping waste liquid is high, or when the waste liquid needs to be maintained within a certain temperature range during the waste liquid treatment process to achieve better waste liquid treatment effect, the temperature of the core-stripping waste liquid can be controlled by a temperature control device, such as heating the core-stripping 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-stripping tank 11 is within the temperature fluctuation range of the core-stripping waste liquid. Specifically, the monitoring device 40 monitors the temperature and pH value of the core-stripping waste liquid in the core-stripping tank 11 in real time and sends 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-stripping waste liquid within the required temperature range, and the gas heating device 30 is used to adjust the temperature of the heating gas according to the received information to ensure that the temperature of the gas input into the core-stripping tank 11 is within the reaction temperature range of the core-stripping waste liquid.

[0071] (3) Insoluble matter coagulates and precipitates.

[0072] In an embodiment of the present invention, a waste liquid treatment agent is added to the decoupling waste liquid, and gas is introduced through a ventilation pipe to ensure that the decoupling waste liquid and the waste liquid treatment agent are in full contact, and the insoluble matter in the decoupling waste liquid quickly coagulates and precipitates.

[0073] In an embodiment of the present invention, the core-removing tank 11 is provided with a volume scale. A prepared PAM aqueous solution is added to the core-removing waste liquid at a ratio of 5 mL to 10 mL of waste liquid treatment agent per liter of core-removing waste liquid. For example, the amount of waste liquid treatment agent added per liter of core-removing waste liquid is one of 5 mL, 6 mL, 7 mL, 8 mL, 9 mL, or 10 mL, or any value within the range described above.

[0074] In an embodiment of the present invention, before or after adding the waste liquid treatment agent to the decoking waste liquid, preferably before, the gas generating device 20 (such as an air compressor) is turned on, and a large number of bubbles are blown in through the air vent of the air pipe 12 so that the decoking waste liquid and the waste liquid treatment agent are in full contact. The destabilized colloidal particles collide and agglomerate with each other in the decoking tank 11. After a period of time, the gas generating device 20 is turned off. When left to stand, the rapid agglomeration and precipitation of fine insoluble fibers can be seen with the naked eye.

[0075] 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. As a flocculant, PAM is non-toxic, inexpensive, requires less dosage, has a faster flocculation speed, and is less affected by the pH value and temperature of the waste liquid.

[0076] (4) After the insoluble gel is precipitated, start the filter. Specifically, control the lifting frame to move vertically upward to drive the filter to move synchronously, so as to concentrate and separate the precipitate and achieve solid-liquid separation.

[0077] (5) The precipitate and solution after solid-liquid separation are treated by environmentally friendly processes.

[0078] Unless otherwise defined, the technical terms used in the following embodiments have the same meaning as commonly understood by those skilled in the art. Unless otherwise specified, the experimental reagents used in the following embodiments are all conventional biochemical reagents; the raw materials, instruments, and equipment used in the following embodiments can all be obtained commercially or through existing methods; unless otherwise specified, the amounts of experimental reagents used are the amounts used in conventional experimental operations; unless otherwise specified, the experimental methods are all conventional methods.

[0079] Example 1 A method for treating the waste liquid obtained after water-soluble wax core removal, the method being based on Figure 1-3 The water-soluble wax core stripping waste liquid treatment device shown below describes the treatment method for the stripping waste liquid as follows: (1) Prepare waste liquid treatment agent.

[0080] The waste liquid treatment agent is a polyacrylamide solution containing 0.15% by mass. After adding PAM to water, it is stirred thoroughly for 50 min to obtain a gel-like PAM aqueous solution, which is used as the waste liquid treatment agent for decoupling waste liquid.

[0081] (2) Pretreatment of waste liquid from decoupling.

[0082] Adjust the temperature of the decoking waste liquid to room temperature (25°C), then add an appropriate amount of sodium hydroxide (pH adjuster) to adjust the pH value of the waste liquid to neutral. Turn on the air compressor and gas heating device 30, and blow a large number of bubbles at a temperature of about 25°C through the vent of the air pipe 12.

[0083] (3) Insoluble matter coagulates and precipitates.

[0084] Add waste liquid treatment agent to the decoking waste liquid at a ratio of 8 mL per liter of decoking waste liquid. Continuously blow a large number of bubbles through the air vent of the air pipe 12 to ensure that the decoking waste liquid and the waste liquid treatment agent are in full contact. The destabilized colloidal particles collide and agglomerate with each other in the decoking tank 11. After a period of time, turn off the gas generating device 20. When left to stand, you can see with the naked eye that the fine insoluble fibers are rapidly agglomerated and precipitated.

[0085] (4) After the insoluble gel precipitation is completed, start the filter to separate and carry out the precipitate to achieve solid-liquid separation.

[0086] (5) The precipitate and solution after solid-liquid separation are treated by environmentally friendly processes.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, and not to limit them. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be covered within 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 the embodiments can be combined in any way. The present invention is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A water soluble wax core de-coring effluent treatment apparatus, characterized by, Includes a device body with a core-removing tank for holding core-removing waste liquid; The core removal tank is equipped with an air pipe and a filter. The air pipe is arranged at the bottom of the core removal tank, and the filter is arranged above the air pipe. The filter moves up and down in the vertical direction relative to the air pipe. The filter includes a filter plate with multiple filter holes, and the air duct includes an air pipe with multiple air holes, wherein the air holes on the air duct are connected to the filter holes on the filter. The device body is externally connected to a gas generating device, which is connected to the ventilation pipe. The gas generating device is used to deliver gas into the core removal tank and introduce gas into the core removal waste liquid through the ventilation pipe. A gas heating device is provided between the main body of the device and the gas generating device. 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. The device body is equipped with a monitoring device that is communicatively connected to the gas heating device, which is used to monitor the temperature and pH value of the decoction waste liquid in the decoction tank in real time and send information to the gas heating device.

2. The aqueous wax core de-coring effluent treatment apparatus of claim 1, wherein, The ventilation duct includes multiple air pipes arranged radially, which are interconnected, and each air pipe has multiple air holes.

3. The aqueous wax core de-coring effluent treatment apparatus of claim 1, wherein, The ventilation duct is retractable to accommodate core-removing grooves of various shapes and sizes.

4. The water-soluble wax core removal waste liquid treatment device as described in claim 3, characterized in that, Each of the aforementioned tracheas has its own independent retractable configuration.

5. The water-soluble wax core removal waste liquid treatment device as described in claim 1, characterized in that, The ventilation pipe is connected to the filter via a lifting frame. The device body is equipped with a controller that is connected to the lifting frame for driving the lifting frame to move vertically and synchronously to move the filter.

6. The water-soluble wax core removal waste liquid treatment device as described in claim 1, characterized in that, The gas generating device includes a gas compressor.

7. The water-soluble wax core removal waste liquid treatment device as described in claim 1, characterized in that, The gas heating device includes a gas heater and a regulator connected to the gas heater, the regulator being used to control the heating temperature of the gas heater.

8. The water-soluble wax core removal waste liquid treatment device as described in claim 1, characterized in that, The monitoring device includes a temperature detector and a pH meter, and the temperature detector is communicatively connected to the gas heating device.

9. The water-soluble wax core removal waste liquid treatment device as described in claim 1, characterized in that, A temperature control device is provided on the main body of the device along the circumference of the core removal tank. The temperature control device is communicatively connected to the monitoring device and is used to control the temperature of the core removal waste liquid in the core removal tank to ensure that the temperature of the core removal waste liquid is maintained within the required temperature range.

10. A method for treating waste liquid, characterized in that, The treatment method is based on the water-soluble wax core removal waste liquid treatment device according to any one of claims 1-9, and the waste liquid treatment method includes: A pH adjuster is added to the waste liquid obtained after removing the water-soluble wax core to adjust the pH value of the waste liquid to neutral. Add waste liquid treatment agent to the core removal waste liquid, and introduce gas through the ventilation pipe to make the core removal waste liquid and waste liquid treatment agent fully contact each other, so that the insoluble matter in the core removal waste liquid can quickly coagulate and precipitate. A filter is used to concentrate and separate the precipitate, thus achieving solid-liquid separation.

11. The waste liquid treatment method as described in claim 10, characterized in that, The waste liquid treatment agent is a solution containing polyacrylamide.

12. The waste liquid treatment method as described in claim 11, characterized in that, The mass percentage of the polyacrylamide is 0.1% to 0.3%.

13. The waste liquid treatment method as described in claim 10, characterized in that, The amount of waste liquid treatment agent added to each liter of the decoupling waste liquid is 5 mL to 10 mL.

Images