NMP waste liquid pretreatment device

Abstract

The utility model discloses an NMP (N-Methyl Pyrrolidone) waste liquid pretreatment device, which is applied to the field of NMP waste liquid treatment and comprises a bottom plate, a treatment tank is arranged on the bottom plate, a liquid inlet is formed in the treatment tank, a liquid outlet pipe is arranged at the bottom of the treatment tank, a control valve is arranged on the liquid outlet pipe, a cooling mechanism is arranged on the treatment tank, and the control valve is arranged on the control valve. A filter plate is arranged in the treatment tank, a slag removal mechanism is arranged on the filter plate, the cooling mechanism is arranged, an air cooling machine is started, cold air is injected into a heat exchange cavity through the air cooling machine, the cold air flows upwards on a spiral plate through the air pressure of the air cooling machine, and the heat transfer effect of the inner wall of the heat exchange cavity is good; in the process, cold air can exchange heat with high temperature in the waste liquid, then the cold air enters the treatment tank through the outlet and further exchanges heat with the temperature in the waste liquid, the temperature in the waste liquid is reduced, and the waste liquid can be prevented from entering the heat exchange cavity due to the fact that the baffle is obliquely arranged.

Description

Technical Field

[0001] The utility model belongs to the technical field of NMP waste liquid treatment, and particularly relates to a NMP waste liquid pretreatment device. Background Art

[0002] With the rapid development of chemical, electronic and other industries, N-methylpyrrolidone (NMP), as an important organic solvent, is increasingly used in these fields. However, the treatment problem of NMP waste liquid has also become prominent. NMP waste liquid contains a large amount of organic matter. If it is directly discharged, it will not only cause waste of resources, but also cause serious pollution to the environment.

[0003] The Chinese utility model patent currently announced as: CN218106873U discloses a NMP waste liquid pretreatment buffer tank, which is provided with a buffer tank, a tank cover is fixedly connected to the top surface of the buffer tank, a motor is fixedly connected to the top surface of the tank cover, and the output end of the motor is rotatably connected to the tank cover, a rotating shaft is fixedly connected to the output end of the motor, and a scraper is fixedly connected to the bottom end of the rotating shaft. The NMP waste liquid pretreatment buffer tank realizes pretreatment that facilitates solid-liquid separation of the NMP waste liquid.

[0004] This patent can pre-treat NMP waste liquid and achieve solid-liquid separation of NMP waste liquid. However, NMP waste liquid may heat up due to chemical reactions or external environment during its production and storage. High-temperature waste liquid may not only accelerate the decomposition and polymerization of internal substances, but may also cause damage to subsequent processing equipment. Utility Model Content

[0005] The utility model aims to provide an NMP waste liquid pretreatment device, which solves the problem that the NMP waste liquid may heat up due to chemical reactions or external environment during the production and storage process, and the high-temperature waste liquid may not only accelerate the decomposition and polymerization of internal substances, but also may cause damage to subsequent processing equipment.

[0006] The above technical purpose of the utility model is achieved through the following technical scheme: a NMP waste liquid pretreatment device, comprising a bottom plate, a treatment tank is arranged on the bottom plate, a liquid inlet is arranged on the treatment tank, a liquid outlet pipe is arranged at the bottom of the treatment tank, a control valve is arranged on the liquid outlet pipe, a cooling mechanism is arranged on the treatment tank, a filter plate is arranged inside the treatment tank, and a slag removal mechanism is arranged on the filter plate;

[0007] The cooling mechanism includes an air cooler, a heat exchange chamber, a spiral plate, an outlet, a baffle and an air outlet. The air cooler is arranged on a bottom plate, the heat exchange chamber is arranged on a side wall of a processing tank, the spiral plate is arranged inside the heat exchange chamber, the outlet is arranged at an upper end of the heat exchange chamber, the baffle is arranged on an inner wall of the processing tank and is inclined, the air outlet is arranged on the baffle, and the number of the air outlets is several and evenly arranged.

[0008] By adopting the above technical scheme, by setting a bottom plate, a processing tank, a liquid inlet, a liquid outlet pipe, a control valve, a cooling mechanism, a filter plate and a slag removal mechanism, when in use, first the bottom plate can fix the processing tank, then the NMP waste liquid is added into the interior of the processing tank through the liquid inlet, and then the solid impurities in the NMP waste liquid are filtered through the filter plate, and at the same time the cooling mechanism can cool the temperature of the NMP waste liquid to prevent the high-temperature waste liquid from accelerating the decomposition and polymerization of the internal substances, and also to avoid damage to the subsequent processing equipment, and then the slag removal mechanism can discharge the solid impurities on the filter plate out of the processing tank and can prevent the solid impurities from clogging the filter plate, and then Then open the control valve to discharge the waste liquid after pretreatment out of the treatment tank, wherein the cooling mechanism includes an air cooler, a heat exchange chamber, a spiral plate, an outlet, a baffle and an air outlet. When in use, first turn on the air cooler, and inject cold air into the heat exchange chamber through the air cooler. The air pressure of the air cooler makes the cold air flow upward on the spiral plate. Since the heat transfer effect of the inner wall of the heat exchange chamber is good, this process can make the cold air exchange heat with the high temperature in the waste liquid. Then the cold air enters the interior of the treatment tank through the outlet, and further exchanges heat with the temperature in the waste liquid to reduce the temperature in the waste liquid. The inclined setting of the baffle can prevent the waste liquid from entering the heat exchange chamber.

[0009] The utility model is further configured as follows: the slag removal mechanism includes a motor, a rotating shaft, a scraper, a slag outlet and a rubber protrusion, the motor is arranged on the upper surface of the processing tank, the rotating shaft is arranged on the output shaft of the motor and extends to the filter plate, the scraper is arranged on the rotating shaft, the slag outlet is arranged on the side wall of the processing tank, and the rubber protrusion is arranged at the bottom of the scraper.

[0010] By adopting the above technical scheme, a motor, a rotating shaft, a scraper, a slag outlet and a rubber protrusion are set. After the pretreatment is completed, the motor is first turned on so that the output shaft of the motor drives the rotating shaft to rotate, and then the scraper is rotated on the filter plate, so that the solid impurities on the filter plate can be discharged through the slag outlet. In the process of rotation of the scraper, the rubber protrusion can clear the filter holes of the filter plate to avoid clogging of the filter plate.

[0011] The utility model is further configured as follows: a sliding groove is provided at the upper end of the slag outlet, a spring is provided inside the sliding groove, the number of the springs is several and evenly arranged, a sealing plate is provided at the other end of the spring, and a special-shaped sealing gasket is provided at the end of the sealing plate away from the spring.

[0012] By adopting the above technical scheme, a sliding groove, a spring, a sealing plate and a special-shaped sealing gasket are set. When in use, the sealing plate is first set in the sliding groove by the spring. When the sealing plate contacts the bottom of the slag outlet, the spring will be deformed. The sealing plate is fixed in the slag outlet by the force of the spring to restore the deformation. The sealing plate can also squeeze the special-shaped sealing gasket, causing the special-shaped sealing gasket to deform, so that the sealing plate can seal the slag outlet.

[0013] The utility model is further configured as follows: a temperature sensor is arranged at the inner bottom of the processing tank, a display screen and a controller are arranged on the side wall of the processing tank, and the display screen and the controller are electrically connected to the temperature sensor and the motor.

[0014] By adopting the above technical solution, by setting up a temperature sensor, a display screen and a controller, when in use, the temperature sensor can first sense the temperature in the waste liquid and transmit it to the display screen, so that the staff can understand whether the waste liquid cooling is completed, and then the controller can control the temperature sensor and the motor.

[0015] The utility model is further configured as follows: the sealing plate is provided with a fixing rod for facilitating the movement of the sealing plate.

[0016] By adopting the above technical solution, a fixed rod is set, which can provide a fulcrum for the staff, so that the staff can move the sealing plate upward and continue to squeeze the spring. Then the staff maintains this state to expose the slag outlet. At this time, the solid impurities on the filter plate can be discharged through the slag outlet.

[0017] The utility model is further configured as follows: a support column is arranged on the lower surface of the bottom plate, the number of the support columns is four and they are arranged symmetrically, and an anti-slip pad is arranged on the lower surface of the support column.

[0018] By adopting the above technical solution, by setting support columns and anti-skid pads, when in use, first the support columns can provide support for the base plate to increase the ground clearance of the base plate, and then the anti-skid pads can increase the friction between the support columns and the ground, further improving the stability of the base plate.

[0019] The utility model is further configured as follows: a material receiving frame is arranged on the bottom plate, and the material receiving frame is arranged corresponding to the slag outlet.

[0020] By adopting the above technical solution and providing a receiving frame, after the solid impurities are discharged through the slag outlet, the solid impurities can fall into the receiving frame and be collected.

[0021] In summary, the utility model has the following beneficial effects:

[0022] By setting up a cooling mechanism, turning on the air cooler, and injecting cold air into the heat exchange chamber through the air cooler, the air pressure of the air cooler causes the cold air to flow upward on the spiral plate. Since the heat transfer effect of the inner wall of the heat exchange chamber is good, this process can enable the cold air to exchange heat with the high temperature in the waste liquid. Then the cold air enters the interior of the treatment tank through the outlet, and further exchanges heat with the temperature in the waste liquid to reduce the temperature of the waste liquid. The inclined setting of the baffle can prevent the waste liquid from entering the heat exchange chamber.

[0023] By setting up a slag removal mechanism and turning on the motor, the output shaft of the motor drives the rotating shaft to rotate, and then the scraper rotates on the filter plate, the solid impurities on the filter plate can be discharged through the slag outlet, and during the rotation of the scraper, the rubber protrusions can clear the filter holes of the filter plate to avoid clogging of the filter plate.

[0024] Based on the above-mentioned improvements, the overall technical effect achieved by the present device is that it can perform solid-liquid separation pretreatment on the NMP waste liquid while also cooling the NMP waste liquid to avoid high-temperature waste liquid accelerating the decomposition and polymerization of internal substances, and to avoid damage to subsequent processing equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0026] Figure 2 It is a left view of the utility model;

[0027] Figure 3 The utility model Figure 2 Stereoscopic cross-section at AA in the middle;

[0028] Figure 4 It is a structural schematic diagram of the sliding groove, spring and sealing plate of the utility model;

[0029] Figure 5 The utility model Figure 3 Enlarged view of point A in the middle.

[0030] In the figure, 1, bottom plate; 2, processing tank; 3, liquid inlet; 4, liquid outlet pipe; 5, control valve; 6, cooling mechanism; 7, filter plate; 8, slag removal mechanism; 9, sliding groove; 10, spring; 11, sealing plate; 12, special-shaped sealing gasket; 13, temperature sensor; 14, display screen; 15, controller; 16, fixing rod; 17, supporting column; 18, anti-skid pad; 19, material receiving frame; 601, air cooler; 602, heat exchange chamber; 603, spiral plate; 604, outlet; 605, baffle; 606, air outlet; 801, motor; 802, rotating shaft; 803, scraper; 804, slag outlet; 805, rubber protrusion. DETAILED DESCRIPTION

[0031] The utility model is further described in detail below in conjunction with the accompanying drawings.

[0032] Example:

[0033] See also Figure 1-Figure 5 The utility model provides a technical solution: a NMP waste liquid pretreatment device, comprising a bottom plate 1, a treatment tank 2 is arranged on the bottom plate 1, a liquid inlet 3 is arranged on the treatment tank 2, a liquid outlet pipe 4 is arranged at the bottom of the treatment tank 2, a control valve 5 is arranged on the liquid outlet pipe 4, a cooling mechanism 6 is arranged on the treatment tank 2, a filter plate 7 is arranged inside the treatment tank 2, and a slag removal mechanism 8 is arranged on the filter plate 7;

[0034] The cooling mechanism 6 includes an air cooler 601, a heat exchange chamber 602, a spiral plate 603, an outlet 604, a baffle 605 and an air outlet 606. The air cooler 601 is arranged on the bottom plate 1, the heat exchange chamber 602 is arranged on the side wall of the processing tank 2, the spiral plate 603 is arranged inside the heat exchange chamber 602, the outlet 604 is arranged at the upper end of the heat exchange chamber 602, the baffle 605 is arranged on the inner wall of the processing tank 2 and is inclined, and the air outlet 606 is arranged on the baffle 605. The number of the air outlets 606 is several and evenly arranged.

[0035] By arranging the bottom plate 1, the processing tank 2, the liquid inlet 3, the liquid outlet pipe 4, the control valve 5, the cooling mechanism 6, the filter plate 7 and the deslagging mechanism 8, when in use, first the bottom plate 1 can fix the processing tank 2, then the NMP waste liquid is added into the processing tank 2 through the liquid inlet 3, then the solid impurities in the NMP waste liquid are filtered through the filter plate 7, and at the same time the cooling mechanism 6 can cool the temperature of the NMP waste liquid to avoid the high temperature waste liquid accelerating the decomposition and polymerization of the internal substances, and also avoid damage to the subsequent processing equipment, and then the deslagging mechanism 8 can discharge the solid impurities on the filter plate 7 out of the processing tank 2 and avoid the solid impurities blocking the filter plate 7, and then open the control valve 5 to remove the waste liquid after the pretreatment is completed. The waste is discharged from the treatment tank 2, wherein the cooling mechanism 6 comprises an air cooler 601, a heat exchange chamber 602, a spiral plate 603, an outlet 604, a baffle 605 and an air outlet 606. When in use, the air cooler 601 is first turned on, and cold air is injected into the heat exchange chamber 602 through the air cooler 601. The air pressure of the air cooler 601 causes the cold air to flow upward on the spiral plate 603. Since the heat transfer effect of the inner wall of the heat exchange chamber 602 is good, this process enables the cold air to exchange heat with the high temperature in the waste liquid. Then the cold air enters the interior of the treatment tank 2 through the outlet 604, and further exchanges heat with the temperature in the waste liquid to reduce the temperature in the waste liquid. The inclined setting of the baffle 605 can prevent the waste liquid from entering the heat exchange chamber 602.

[0036] refer to Figure 3 and Figure 5 The slag removal mechanism 8 includes a motor 801, a rotating shaft 802, a scraper 803, a slag outlet 804 and a rubber protrusion 805. The motor 801 is arranged on the upper surface of the processing tank 2, the rotating shaft 802 is arranged on the output shaft of the motor 801 and extends to the filter plate 7, the scraper 803 is arranged on the rotating shaft 802, the slag outlet 804 is arranged on the side wall of the processing tank 2, and the rubber protrusion 805 is arranged at the bottom of the scraper 803. 2. Scraper 803, slag outlet 804 and rubber protrusion 805. After the pretreatment is completed, first turn on the motor 801 so that the output shaft of the motor 801 drives the rotating shaft 802 to rotate, and then the scraper 803 rotates on the filter plate 7, which can discharge the solid impurities on the filter plate 7 through the slag outlet 804. In the process of the rotation of the scraper 803, the rubber protrusion 805 can clear the filter holes of the filter plate 7 to avoid clogging of the filter plate 7.

[0037] refer to Figure 4A sliding groove 9 is provided at the upper end of the slag outlet 804, and a spring 10 is provided inside the sliding groove 9. The number of springs 10 is several and evenly arranged. A sealing plate 11 is provided at the other end of the spring 10, and a special-shaped sealing gasket 12 is provided at the end of the sealing plate 11 away from the spring 10. By setting the sliding groove 9, the spring 10, the sealing plate 11 and the special-shaped sealing gasket 12, when in use, the sealing plate 11 is first set in the sliding groove 9 through the spring 10. When the sealing plate 11 contacts the bottom of the slag outlet 804, the spring 10 will be deformed. The sealing plate 11 is fixed in the slag outlet 804 by the force of the spring 10 to restore the deformation, and the sealing plate 11 can squeeze the special-shaped sealing gasket 12, so that the special-shaped sealing gasket 12 is deformed, so that the sealing plate 11 can seal the slag outlet 804.

[0038] refer to Figure 1 and Figure 3 A temperature sensor 13 is provided at the inner bottom of the processing tank 2, and a display screen 14 and a controller 15 are provided on the side wall of the processing tank 2. The display screen 14 and the controller 15 are electrically connected to the temperature sensor 13 and the motor 801. By setting the temperature sensor 13, the display screen 14 and the controller 15, when in use, the temperature sensor 13 can first sense the temperature in the waste liquid and transmit it to the display screen 14, so that the staff can understand whether the waste liquid cooling is completed, and then the controller 15 can control the temperature sensor 13 and the motor 801.

[0039] refer to Figure 4 A fixing rod 16 is provided on the sealing plate 11 for facilitating the movement of the sealing plate 11. By providing the fixing rod 16, the fixing rod 16 can provide a fulcrum for the staff, so that the staff can move the sealing plate 11 upward and continue to squeeze the spring 10. Then the staff maintains this state to expose the slag outlet 804. At this time, the solid impurities on the filter plate 7 can be discharged through the slag outlet 804.

[0040] refer to Figure 1 A support column 17 is provided on the lower surface of the base plate 1. There are four support columns 17 and they are symmetrically arranged. An anti-skid pad 18 is provided on the lower surface of the support column 17. By arranging the support column 17 and the anti-skid pad 18, when in use, firstly, the support column 17 can provide support for the base plate 1 to increase the ground clearance of the base plate 1, and then the anti-skid pad 18 can increase the friction between the support column 17 and the ground, thereby further improving the stability of the base plate 1.

[0041] refer to Figure 1 A material receiving frame 19 is provided on the bottom plate 1, and the material receiving frame 19 is provided corresponding to the slag outlet 804. By providing the material receiving frame 19, after the solid impurities are discharged through the slag outlet 804, the solid impurities can fall into the material receiving frame 19 and be collected.

[0042] Brief description of the usage process:

[0043] When in use, first, the bottom plate 1 can fix the processing tank 2, and then the NMP waste liquid is added to the inside of the processing tank 2 through the liquid inlet 3, and then the solid impurities in the NMP waste liquid are filtered through the filter plate 7, and at the same time, the air cooler 601 is turned on, and cold air is injected into the heat exchange chamber 602 through the air cooler 601. The air pressure of the air cooler 601 causes the cold air to flow upward on the spiral plate 603. Due to the good heat transfer effect of the inner wall of the heat exchange chamber 602, this process can make the cold air exchange heat with the high temperature in the waste liquid, and then the cold air enters the inside of the processing tank 2 through the outlet 604, and further exchanges heat with the temperature in the waste liquid to reduce the temperature in the waste liquid. The baffle 605 is inclined to prevent the waste liquid from entering the heat exchange chamber 602;

[0044] Then, the motor 801 is turned on, so that the output shaft of the motor 801 drives the rotating shaft 802 to rotate, and then the scraper 803 rotates on the filter plate 7, so that the solid impurities on the filter plate 7 can be discharged through the slag outlet 804, and during the rotation of the scraper 803, the rubber protrusion 805 can clear the filter holes of the filter plate 7, so as to avoid the filter plate 7 from being blocked;

[0045] Then, the sealing plate 11 is arranged in the sliding groove 9 through the spring 10. When the sealing plate 11 contacts the bottom of the slag outlet 804, the spring 10 will be deformed. The sealing plate 11 is fixed in the slag outlet 804 by the force of the spring 10 to restore the deformation, and the sealing plate 11 can squeeze the special-shaped sealing gasket 12 to deform the special-shaped sealing gasket 12, so that the sealing plate 11 can seal the slag outlet 804. The fixing rod 16 can provide a fulcrum for the staff, so that the staff can move the sealing plate 11 upwards and continue to squeeze the spring 10. Then the staff maintains this state to expose the slag outlet 804. At this time, the solid impurities on the filter plate 7 can be discharged through the slag outlet 804.

[0046] Finally, the temperature sensor 13 can sense the temperature in the waste liquid and transmit it to the display screen 14, so that the staff can know whether the waste liquid cooling is completed, and then the controller 15 can control the temperature sensor 13 and the motor 801.

[0047] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.

Claims

1. A NMP waste liquid pretreatment device, comprising a bottom plate (1), characterized in that: A processing tank (2) is arranged on the bottom plate (1), a liquid inlet (3) is arranged on the processing tank (2), a liquid outlet pipe (4) is arranged at the bottom of the processing tank (2), a control valve (5) is arranged on the liquid outlet pipe (4), a cooling mechanism (6) is arranged on the processing tank (2), a filter plate (7) is arranged inside the processing tank (2), and a slag removal mechanism (8) is arranged on the filter plate (7); The cooling mechanism (6) comprises an air cooler (601), a heat exchange chamber (602), a spiral plate (603), an outlet (604), a baffle (605) and an air outlet (606); the air cooler (601) is arranged on the bottom plate (1); the heat exchange chamber (602) is arranged on the side wall of the processing tank (2); the spiral plate (603) is arranged inside the heat exchange chamber (602); the outlet (604) is arranged at the upper end of the heat exchange chamber (602); the baffle (605) is arranged on the inner wall of the processing tank (2) and is inclined; the air outlet (606) is arranged on the baffle (605); and the number of the air outlets (606) is several and evenly arranged.

2. A NMP waste liquid pretreatment device according to claim 1, characterized in that: The slag removal mechanism (8) comprises a motor (801), a rotating shaft (802), a scraper (803), a slag outlet (804) and a rubber protrusion (805); the motor (801) is arranged on the upper surface of the processing tank (2); the rotating shaft (802) is arranged on the output shaft of the motor (801) and extends to the filter plate (7); the scraper (803) is arranged on the rotating shaft (802); the slag outlet (804) is arranged on the side wall of the processing tank (2); and the rubber protrusion (805) is arranged at the bottom of the scraper (803).

3. A NMP waste liquid pretreatment device according to claim 2, characterized in that: A sliding groove (9) is provided at the upper end of the slag outlet (804), a spring (10) is provided inside the sliding groove (9), the springs (10) are provided in a plurality and are evenly arranged, a sealing plate (11) is provided at the other end of the spring (10), and a special-shaped sealing gasket (12) is provided at the end of the sealing plate (11) away from the spring (10).

4. A NMP waste liquid pretreatment device according to claim 2, characterized in that: A temperature sensor (13) is arranged at the inner bottom of the processing tank (2), and a display screen (14) and a controller (15) are arranged on the side wall of the processing tank (2), and the display screen (14) and the controller (15) are electrically connected to the temperature sensor (13) and the motor (801).

5. A NMP waste liquid pretreatment device according to claim 3, characterized in that: The sealing plate (11) is provided with a fixing rod (16) for facilitating the movement of the sealing plate (11).

6. A NMP waste liquid pretreatment device according to claim 1, characterized in that: The lower surface of the base plate (1) is provided with support columns (17), the number of the support columns (17) is four and they are symmetrically arranged, and the lower surface of the support columns (17) is provided with anti-slip pads (18).

7. A NMP waste liquid pretreatment device according to claim 2, characterized in that: A material receiving frame (19) is provided on the bottom plate (1), and the material receiving frame (19) is arranged corresponding to the slag outlet (804).

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