Pretreatment system of cutting fluid recovery and separation tank

Abstract

The utility model discloses a pretreatment system for a cutting fluid recovery and separation tank. The pretreatment system comprises a hydrocyclone, a gas-liquid jet mixer and a pipeline type electrolytic reactor which are sequentially connected in series, the hydrocyclone is used for separating the mixed liquid to be treated; the gas-liquid jet mixer sucks gas through the change of the section of a pipe cavity of the main pipe so as to dissolve the gas into a mixed solution to be treated; after being treated by the gas-liquid jet mixer, the mixed liquid carries bubbles, a multi-dimensional electrode effect is formed in an electric field, and the electrolysis mass transfer efficiency is higher, so that when the mixed liquid penetrates through the pipeline type electrolysis reactor, a better oxidation sterilization effect is achieved, a larger gas-liquid ratio and more uniform micro-nano bubbles are provided for subsequent air flotation separation, and the separation efficiency is improved. Finer impurities can be adhered and separated, so that defoaming treatment is not needed.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of cutting fluid recovery technical field, especially cutting fluid recovery separation pool pretreatment system. BACKGROUND

[0002] Aluminum die casting exists after die casting molding demoulding allowance and surface burr, so it needs to be machined by NC numerical control machining center, lathe, milling machine and other finishing equipment, and cutting fluid is needed for lubrication and cooling in the cutting and milling process. The price of high-performance cutting fluid for aluminum parts is not cheap. During the machining process, the cutting fluid performance is gradually deteriorated due to the mixing of leaked lubricating oil from the machine tool hydraulic system and guide rail, aluminum metal scraps and grinding dust, and finally becomes waste liquid that must be discharged. However, waste cutting fluid is classified as hazardous waste, and its treatment must be handled by qualified environmental protection units, which is very expensive.

[0003] Generally, cutting fluid purification equipment uses gas to mix with cutting fluid to form foam, which is then separated and settled in the purification tank.

[0004] Patent document CN120900260A discloses a waste cutting fluid separation iron chip removal device, which includes a settling tank, an L-shaped flow slowing plate is arranged on the inner side of the settling tank, a flow liquid channel exists between one side of the L-shaped flow slowing plate and the inner side wall of the settling tank, inclined plates are fixedly arranged at equal intervals on the lower side of the L-shaped flow slowing plate, the inclined plates are all inclined downward away from the flow liquid channel, an overflow notch is formed on the side of the settling tank away from the flow liquid channel, the overflow notch is arranged on the upper side of the inclined plate, and a defoaming mechanism is arranged on the lower side of the L-shaped flow slowing plate; the defoaming net repeatedly shakes in the narrow space between the inclined plates, quickly destroys the surface tension of the foam and oil film through segmentation and friction, and the metal scraps released by the broken foam quickly sink under the action of the inclined plates, increasing the subsequent pressure.

[0005] Although the above-mentioned device can make the entrained metal scraps sink by destroying the surface tension of the foam and oil film through the defoaming mechanism, the destruction of the foam also makes the oil dirt return to the liquid to be treated, thereby deteriorating the purification effect. UTILITY MODEL CONTENTS

[0006] The utility model discloses a cutting fluid recovery separation pool pretreatment system to solve the problems in the prior art.

[0007] The utility model discloses a cutting fluid recovery separation pool pretreatment system to solve the problems in the prior art.

[0008] The utility model discloses a cutting fluid recovery separation pool pretreatment system to solve the problems in the prior art.

[0009] The rotation of the hydrocyclone separates the mixed liquid entering the hydrocyclone, and the separated oil phase is discharged through an oil discharge pipeline above the outer cylinder of the hydrocyclone; further mixed liquid to be treated flows into the gas-liquid jet mixer from a liquid discharge pipeline on the side of the outer cylinder of the hydrocyclone;

[0010] The gas-liquid jet mixer inhales gas through the change of the lumen cross section of the main pipe to dissolve the gas into the mixed liquid to be treated.

[0011] The electric field of the electrolysis chamber of the pipeline electrolysis reactor oxidizes and sterilizes the mixed liquid to be treated entering the electrolysis chamber from the gas-liquid jet mixer, and precipitates micro-nano bubbles.

[0012] The preferred technical solution adopted by the utility model to solve the above technical problems is that the pipeline electrolysis reactor comprises a horizontal pipeline shell, electrolysis chamber partitions spaced from each other, anode plates and cathode plates spaced from each other in the horizontal pipeline shell; the anode plates and the cathode plates are supported by the electrolysis chamber partitions to separate the inner cavity of the horizontal pipeline shell into a plurality of electrolysis chambers.

[0013] The preferred technical solution adopted by the utility model to solve the above technical problems is that the lumen of the main pipe of the gas-liquid jet mixer comprises a jet acceleration section, a steady flow throat section and a diffusion mixing section in sequence from the liquid flow inlet end to the liquid flow outlet end.

[0014] The pipe diameter of the jet acceleration section gradually shrinks from the liquid flow inlet end; the steady flow throat section is of equal diameter and the pipe diameter is greater than the end of the jet acceleration section; the pipe diameter of the diffusion mixing section gradually expands towards the liquid flow outlet end and the initial end pipe diameter is the same as that of the steady flow throat section.

[0015] The preferred technical solution adopted by the utility model to solve the above technical problems is that the main pipe is provided with a negative pressure annular air cavity at the rear position of the jet acceleration section, an air inlet pipe is vertically connected to the main pipe and is in butt joint communication with the negative pressure annular air cavity; the connection between the jet acceleration section and the steady flow throat section is misaligned to form an air cavity opening in communication with the negative pressure annular air cavity.

[0016] The preferred technical solution adopted by the utility model to solve the above technical problems is that the inner ring wall of the negative pressure annular air cavity is a conical surface gradually reducing in outer diameter from the liquid flow inlet end to the liquid flow outlet end of the main pipe.

[0017] The preferred technical solution adopted by the utility model to solve the above technical problems is that the gas source end of the air inlet pipe of the gas-liquid jet mixer is provided with an ozone generator, and the ozone generated by the ozone generator is inhaled into the gas-liquid jet mixer.

[0018] The utility model discloses a preferred technical scheme that solves the above technical problems is: still be equipped with basket type filter device before the hydrocyclone to filter big granular impurities.

[0019] The utility model discloses a preferred technical scheme that solves the above technical problems is: be equipped with the basket type filter device with filter basket before the hydrocyclone.

[0020] The utility model discloses a preferred technical scheme that solves the above technical problems is: basket type filter device includes two parallel basket type filters, and the inlet of two basket type filters is communicated with same liquid inlet pipe, and the outlet of two basket type filters is connected with hydrocyclone through same pipeline.

[0021] The utility model discloses a preferred technical scheme that solves the above technical problems is: air inlet pipe is connected with gas source through air pipe, and check valve and suction volume regulating valve are sequentially arranged from gas source to air inlet pipe direction of air pipe.

[0022] Compared with the prior art, the utility model has the advantages that: the multi-pass series pretreatment process can pretreat the contaminated cutting fluid, especially after the gas-liquid jet mixer treatment, the mixed liquid carries bubbles, and forms a multi-dimensional electrode effect in the electric field, and the electrolytic mass transfer efficiency is higher. This leads to the fact that when the mixed liquid penetrates the pipeline type electrolytic reactor, the electric field formed by the positive and negative electrode plates has a more obvious effect on the mixed liquid. Therefore, a better oxidation and sterilization effect is achieved, which provides a larger gas-liquid ratio and more uniform micro-nano bubbles for subsequent air flotation separation, can adhere to separate smaller impurities, and thus does not need to be defoamed. BRIEF DESCRIPTION OF DRAWINGS

[0023] The utility model will be described further in detail below in combination with the drawings and preferred embodiments, but those skilled in the art will appreciate that the drawings are only drawn for the purpose of explaining the preferred embodiments, and therefore should not be regarded as a limitation on the scope of the utility model. In addition, unless specifically indicated, the drawings only schematically show the composition or structure of the described objects and can include exaggerated display, and the drawings are not necessarily drawn to scale.

[0024] Figure 1 It is the schematic diagram of cutting fluid recovery separation pool pretreatment system;

[0025] Figure 2 It is the perspective view of gas-liquid jet mixer of cutting fluid recovery separation pool pretreatment system;

[0026] Figure 3 It is the perspective view of basket type filter device of cutting fluid recovery separation pool pretreatment system;

[0027] Figure 4 It is the sectional view of gas-liquid jet mixer of cutting fluid recovery separation pool pretreatment system;

[0028] Figure 5 A cross-sectional view of the pipeline electrolytic reactor in the pretreatment system of the cutting fluid recovery and separation tank.

[0029] Figure label:

[0030] 1. Hydrocyclone; 2. Gas-liquid jet mixer; 3. Pipeline electrolysis reactor; 20. Main pipe; 31. Horizontal pipe shell; 32. Electrolysis chamber partition; 33. Anode plate; 34. Cathode plate; 21. Jet acceleration section; 22. Flow stabilization throat section; 23. Diffusion mixing section; 24. Negative pressure annular gas chamber; 25. Inlet pipe; 26. Check valve; 27. Intake volume regulating valve; 4. Basket filter device; 40. Basket filter. Detailed Implementation

[0031] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are merely descriptive and exemplary and should not be construed as limiting the scope of protection of the present invention.

[0032] It should be noted that similar labels in the following figures indicate similar items; therefore, once an item is defined in one figure, it will not be further defined and explained in subsequent figures.

[0033] In the description of this utility model, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the die-cast part of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] like Figure 1 As shown, this embodiment provides a cutting fluid recovery and separation tank pretreatment system, including a hydrocyclone 1, a gas-liquid jet mixer 2, and a pipeline electrolysis reactor 3 connected in series.

[0035] The rotation of the hydrocyclone 1 separates the mixture to be treated inside the hydrocyclone 1, and the oil phase is discharged through the oil drain pipe above the outer cylinder of the hydrocyclone 1. The mixture to be further treated flows into the gas-liquid jet mixer 2 from the liquid drain pipe on the side of the outer cylinder of the hydrocyclone 1.

[0036] The gas-liquid jet mixer 2 draws in gas through the change in the cross-sectional area of ​​the main pipe 20 to dissolve the gas into the mixture to be treated. After these gases form small bubbles, they adhere to impurities and oil stains in the liquid phase, thus purifying the cutting fluid and achieving air flotation pretreatment.

[0037] As Figure 1 shown, the key innovation of the embodiment is that a pipeline electrolytic reactor 3 is arranged after the gas-liquid jet mixer 2, and the electric field of the electrolytic chamber of the pipeline electrolytic reactor 3 oxidizes and sterilizes the mixed liquid to be treated entering the electrolytic chamber from the gas-liquid jet mixer 2, and precipitates micro-nano bubbles. Specifically, the liquid passing through the jet mixing device 4 carries micro-bubbles, forms a multi-dimensional electrode effect in the electric field, and the electrolytic mass transfer efficiency is higher.

[0038] When the liquid phase penetrates through the electrode plate group, the electric field formed by the positive and negative electrode plates has a direct oxidation and sterilization effect; the electric field neutralization effect makes the colloids in the cutting fluid unstable, and the subsequent gas floatation or sedimentation separation is easier; at the same time, oxygen is precipitated at the anode and hydrogen is precipitated at the cathode, and the gas produced by electrolysis is in a micro-nano state, which increases the gas phase capacity in the cutting fluid, provides a larger gas-liquid ratio and more uniform micro-nano bubbles for subsequent gas floatation separation, and can adhere to separate smaller and more powder, particulate matter and dirty oil.

[0039] As Figure 5 shown, the pipeline electrolytic reactor 3 includes a transverse pipeline shell 31, electrolytic chamber partitions 32 spaced from each other, anode plates 33 and cathode plates 34 spaced from each other in the transverse pipeline shell 31, and the anode plates 33 and the cathode plates 34 are supported by the electrolytic chamber partitions 32 to separate the cavity in the transverse pipeline shell 31 into multiple electrolytic chambers. After electrification, oxidation reaction occurs at the anode, producing oxidizing substances such as hydroxyl radicals to decompose organic matter and sterilize; reduction reaction occurs at the cathode, producing hydrogen micro-bubbles to adsorb impurities. The electrolytic chamber partitions 32 guide the fluid to flow tortuously, increase the residence time, and improve the reaction efficiency.

[0040] As Figure 2 , 4 shown, the lumen of the main pipe 20 of the gas-liquid jet mixer 2 includes a jet acceleration section 21, a steady flow throat section 22, and a diffusion mixing section 23 in sequence from the liquid flow inlet end to the liquid flow outlet end. Another key innovation of the embodiment is that the pipe diameter of the jet acceleration section 21 gradually shrinks from the liquid flow inlet end; the steady flow throat section 22 is of equal diameter and the pipe diameter is greater than the end of the jet acceleration section 21; the pipe diameter of the diffusion mixing section 23 gradually expands towards the liquid flow outlet end and the initial end pipe diameter is the same as that of the steady flow throat section 22; the main pipe 20 is provided with a negative pressure annular air cavity 24 located at the rear section of the jet acceleration section 21, and an air inlet pipe 25 is vertically connected to the main pipe 20 and is in butt joint communication with the negative pressure annular air cavity 24. The connection between the jet acceleration section 21 and the steady flow throat section 22 is staggered to form an air cavity opening communicating with the negative pressure annular air cavity 24.

[0041] As the liquid enters the jet acceleration section 21, the pipe diameter contracts, the flow velocity increases, and the pressure decreases, creating a negative pressure at the air chamber opening at the end of the jet acceleration section 21. Gas enters the negative pressure annular air chamber 24 through the air inlet pipe 25 and is drawn into the liquid flow from the air chamber opening. In the steady flow throat section 22, the gas-liquid mixture is stable; in the diffusion mixing section 23, the pipe diameter expands, the flow velocity decreases, the pressure rises, and the bubbles are sheared and compressed to form microbubbles, improving the air flotation effect.

[0042] like Figure 2 , 4 As shown, the air inlet pipe 25 of the gas-liquid jet mixer 2 is connected to the air source via an air pipe. A check valve 26 and an air intake regulating valve 27 are sequentially installed from the air source to the air inlet pipe 25. The high-speed flowing liquid in the main pipe 20 generates negative pressure in the injection section, drawing in gas through the air inlet pipe 25. The check valve 26 ensures unidirectional gas flow, preventing backflow of cutting fluid. The air intake regulating valve 27 adjusts the gas flow rate by changing its opening, thereby controlling the bubble diameter and enhancing the adsorption effect of bubbles on oil contaminants.

[0043] like Figure 4 As shown, the inner ring wall of the negative pressure annular gas chamber 24 is a conical surface whose outer diameter gradually decreases from the liquid inlet end of the main pipe 20 to the liquid outlet end. The conical design of the inner ring wall ensures continuous liquid flow from the jet acceleration section 21 to the steady flow throat section 22, avoids eddies caused by sudden expansion, and maintains stability in the negative pressure region.

[0044] like Figure 1 , 2 As shown in Figure 4, an ozone generator is installed at the air source end of the air inlet pipe 25. The ozone generated by the ozone generator is drawn into the gas-liquid jet mixer 2. The ozone is drawn into the gas-liquid jet mixer 2 through the air inlet pipe 25 and dissolved in the liquid, creating reaction conditions for sterilization and deodorization, that is, using residual pressure to achieve the purpose of dissolving gas and mixing sterilizing agents.

[0045] like Figure 1 , 3 As shown, a basket filter device 4 is provided before the hydrocyclone 1 to filter large particulate impurities. The basket filter device 4 includes two basket filters 40 connected in parallel. The inlets of the two basket filters 40 are connected to the same inlet pipe, and the outlets of the two basket filters 40 are connected to the hydrocyclone 1 through the same pipe.

[0046] Each filter operates independently, and their outlets converge before entering hydrocyclone 1. This parallel design not only distributes the filtration load, extends the filter basket cleaning cycle, and reduces maintenance frequency, but also improves system reliability and continuity. When one filter is clogged or undergoing maintenance, the other can continue operating, avoiding downtime losses. At the same time, it allows for online cleaning or filter basket replacement via valve switching, ensuring uninterrupted system operation.

[0047] The specific examples are applied herein to introduce the cutting fluid recycling and separating pool pretreatment system provided by the utility model, and the above embodiment is only used for helping understanding the utility model and core idea. It should be pointed out that for ordinary skilled person in the art, without departing from the principle of the utility model, the utility model can be improved and modified in several ways, and these improvements and modifications also fall within the protection scope of the utility model claim.

Claims

1. A pretreatment system for a cutting fluid recovery and separation tank, characterized in that: It includes a hydrocyclone, a gas-liquid jet mixer and a tubular electrolysis reactor connected in series; The rotation of the hydrocyclone's cyclone separator separates the mixture to be treated inside the hydrocyclone. The separated oil phase is discharged through the oil drain pipe above the outer cylinder of the hydrocyclone. The mixture to be further treated flows into the gas-liquid jet mixer from the liquid drain pipe on the side of the outer cylinder of the hydrocyclone. The gas-liquid jet mixer draws in gas by changing the cross-sectional area of ​​the main pipe to dissolve the gas into the mixture to be treated; The electric field of the electrolysis chamber of the pipeline electrolysis reactor oxidizes and sterilizes the mixture to be treated entering the electrolysis chamber from the gas-liquid jet mixer, and precipitates micro-nano bubbles.

2. The cutting fluid recovery and separation tank pretreatment system according to claim 1, characterized in that: The tubular electrolytic reactor includes a transverse tubular shell, spaced-apart electrolytic chamber partitions, and spaced-apart anode and cathode plates located inside the transverse tubular shell. The anode and cathode plates are supported by the electrolytic chamber partitions to divide the inner cavity of the transverse tubular shell into multiple electrolytic chambers.

3. The pretreatment system for the cutting fluid recovery and separation tank according to claim 1, characterized in that: The main tube of the gas-liquid jet mixer includes, from the liquid inlet end to the liquid outlet end, a jet acceleration section, a flow stabilization throat section, and a diffusion mixing section in sequence. The diameter of the jet acceleration section gradually narrows from the liquid inlet end; the flow stabilizing throat section is of constant diameter and its diameter is larger than that of the end of the jet acceleration section; the diameter of the diffusion mixing section gradually widens from the liquid outlet end and its initial diameter is the same as that of the flow stabilizing throat section.

4. The pretreatment system for the cutting fluid recovery and separation tank according to claim 3, characterized in that: The main pipe is provided with a negative pressure annular air chamber located at the rear of the jet acceleration section. The air intake pipe is vertically connected to the main pipe and is connected to the negative pressure annular air chamber. The connection between the jet acceleration section and the flow stabilization throat section is staggered to form an air chamber opening that connects to the negative pressure annular air chamber.

5. The pretreatment system for the cutting fluid recovery and separation tank according to claim 4, characterized in that: The inner ring wall of the negative pressure annular gas chamber is a conical surface whose outer diameter gradually decreases from the liquid inlet end to the liquid outlet end of the main pipe.

6. The pretreatment system for the cutting fluid recovery and separation tank according to claim 1, characterized in that: An ozone generator is installed at the gas source end of the air inlet pipe of the gas-liquid jet mixer, and the ozone generated by the ozone generator is drawn into the gas-liquid jet mixer.

7. The cutting fluid recovery and separation tank pretreatment system according to claim 1, characterized in that: A basket filter is installed before the hydrocyclone to filter out large particulate impurities.

8. The pretreatment system for the cutting fluid recovery and separation tank according to claim 7, characterized in that: The basket filter device includes two basket filters connected in parallel. The inlets of the two basket filters are connected to the same inlet pipe, and the outlets of the two basket filters are connected to a hydrocyclone through the same pipe.

9. The pretreatment system for the cutting fluid recovery and separation tank according to claim 6, characterized in that: The air intake pipe is connected to the air source through an air pipe. The air pipe is equipped with a check valve and an air intake regulating valve in sequence from the air source to the air intake pipe.

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