Chemical raw material intermediate wastewater distillation equipment and distillation method thereof

Abstract

The present application relates to wastewater distillation technical field, especially to a kind of chemical raw material intermediate wastewater distillation equipment and distillation method thereof.It includes primary distillation unit and condensing unit, the bottom of the primary distillation unit is connected with secondary distillation unit, the primary distillation unit includes distillation ball of spherical structure, first rotating rod is rotatably connected in the distillation ball, the periphery of the first rotating rod is annular array distribution with several groups of first scraping mechanism;The secondary distillation unit includes distillation kettle with hemispherical structure at bottom.The present application carries out secondary distillation in the form of hierarchical intensity, not only save energy consumption, but also improve distillation effect and harmful substance separation effect.At the same time, distillation ball and distillation kettle are respectively set as spherical and hemispherical, reduce bottom area, reduce precipitation probability, and use first scraping mechanism and second scraping mechanism to respectively stir and scrape wall of the inner wall of both, also reduce the residue of waste residue.

Description

A distillation device and method for wastewater from chemical raw material intermediates Technical Field

[0001] This invention belongs to the field of wastewater distillation technology, and specifically relates to a distillation device and method for wastewater containing chemical raw material intermediates. Background Technology

[0002] In the production process of chemical products, water is needed as an intermediate to react with or clean chemical raw materials. Afterwards, the intermediate wastewater will contain a large number of harmful chemical substances. At this time, the wastewater needs to be distilled, which can not only reduce environmental pollution, but also achieve water resource reuse.

[0003] A search revealed a patent document with publication number CN222159812U, published on December 13, 2024, entitled "A High-Pollution Wastewater Distillation and Recovery Equipment." The document includes a distillation vessel, a mounting frame, a support, a mounting frame fixed to the outer wall of the distillation vessel, and a support fixed to the outer wall of the mounting frame. An arc-shaped component is snapped onto the top of the distillation vessel, and a condenser is snapped onto the bottom of the other side of the arc-shaped component. The condenser includes a condenser outer pipe, an inlet pipe, an exhaust pipe, and a gas-expelling box. An exhaust pipe is fixedly installed on the bottom of one side of the condenser outer pipe. The arc-shaped component includes a guide plate, a condenser outer pipe, an arc-shaped pipe, and the bottom of the snap-fit ​​pipe a is snapped onto the top of the distillation vessel. The above embodiment uses a combination of condenser and air-driving box. When the airflow flows at high speed inside the condenser tube, it will carry away the heat absorbed by the condenser tube and discharge it directly from the inside of the exhaust pipe. Because the inside of the narrow opening is smaller than the inside of the exhaust pipe, the airflow at high speed will cause a negative pressure to form inside the narrow opening, which will absorb the cold air from the outside and exchange heat with the discharged hot air, thus solving the problem of slow condensation effect.

[0004] However, the above embodiments still have the following drawbacks:

[0005] The above embodiments use high-temperature distillation, which causes some harmful substances to react and evaporate along with the water, and is carried out. Moreover, the use of uniform temperature control for a single distillation also increases energy consumption, resulting in incomplete distillation and increased energy consumption. Summary of the Invention

[0006] To address the above problems, the present invention provides a distillation device for chemical raw material intermediate wastewater, comprising a primary distillation unit and a condensation unit. The bottom of the primary distillation unit is connected to a secondary distillation unit. The primary distillation unit includes a distillation ball with a spherical structure. A first rotating rod is rotatably connected inside the distillation ball. Several sets of first scraping mechanisms are distributed in a ring array around the first rotating rod.

[0007] The secondary distillation unit includes a distillation vessel with a hemispherical bottom structure. A second rotating rod is provided inside the distillation vessel, and several sets of second scraping mechanisms are distributed in a circular array around the second rotating rod. Both the distillation ball and the distillation vessel are connected to the condensation unit.

[0008] First, the wastewater undergoes low-temperature, high-pressure distillation in a primary distillation unit, followed by a secondary distillation unit that increases the temperature and pressure accordingly. This achieves staged distillation of the wastewater. Furthermore, by stirring and scraping the walls of the spherical and hemispherical distillation balls and the distillation vessel, energy consumption is reduced while distillation becomes more thorough.

[0009] Furthermore, a first motor is provided at the center of the top of the distillation ball, and a first high-pressure air outlet and a first liquid inlet are respectively provided on both sides of the first motor. The input end of the first rotating rod is connected to the first motor for transmission. A set of stirring rods is connected between each set of the first scraping mechanism and the first rotating rod.

[0010] Furthermore, the first scraping mechanism includes a first crescent plate, the side view of which is a fan-shaped annular structure, and the side wall of the first crescent plate away from the first rotating rod is slidably attached to the inner wall of the distillation ball; the side wall of the first crescent plate near the first rotating rod is set as an arc surface, and the widths of the two sides of the arc surface are different.

[0011] Furthermore, several groups of drainage channels are arranged at equal intervals along the length of the arc surface. The drainage channels are inclined, and the height of the drainage channel is higher at the end of the arc surface that is wider than the other end. Both ends of the drainage channel are open structures.

[0012] Furthermore, a dispensing unit is connected between the primary distillation unit and the secondary distillation unit. The dispensing unit includes a dispensing tray with several sets of vertical sliding grooves arranged in a circular array on the inner wall of the dispensing tray. The bottom of the dispensing tray has an open structure. A second liquid inlet is provided at the top of the dispensing tray. The bottom of the second liquid inlet extends into the dispensing tray and is connected to a bamboo-joint telescopic tube. The top of the bamboo-joint telescopic tube is connected to a hemispherical dispensing vessel.

[0013] Furthermore, the side wall of the separator is provided with a number of dispensing mechanisms arranged in a ring array, the same number as the number of vertical sliding grooves. Each dispensing mechanism is slidably connected to a corresponding set of vertical sliding grooves at the end away from the separator. An electric push rod is provided on one side of the separator in a vertical direction, and the output end of the electric push rod is fixedly connected to the separator through a set of crossbars.

[0014] Furthermore, the second scraping mechanism includes a second crescent plate, the side view of which is a fan-shaped annular structure. A top plate is installed on the top of the second crescent plate, and an anti-overflow arc surface is provided at the bottom of the top plate. The thickness of the anti-overflow arc surface near one end of the second crescent plate is less than that at the other end.

[0015] Furthermore, the condensation unit includes a condensation tower, the top of which is provided with an air inlet, the bottom of which extends into the condensation tower and is connected to a funnel-shaped gas distribution hopper; the bottom of the condensation tower is provided with a finished product liquid outlet.

[0016] Furthermore, within the condensing tower, several groups of condensing cylinders are arranged at equal intervals outward from its own central axis, and the diameters of the several groups of condensing cylinders are arranged in an arithmetic progression; the gap between two adjacent groups of condensing cylinders is set as a lower gas channel, and within each group of lower gas channels, several groups of condensing meshes are arranged in an arithmetic progression from the inside out.

[0017] A distillation method for a chemical raw material intermediate wastewater distillation apparatus, the distillation method comprising:

[0018] Pour the wastewater into the distillation bulb, then adjust the air pressure inside the distillation bulb to a negative pressure in the range of -90 kPa to -93 kPa, and heat the inner cavity of the distillation bulb.

[0019] Control the first scraping mechanism of each group to rotate along the central axis of the distillation ball to stir the wastewater;

[0020] When the temperature inside the distillation bulb reaches the range of 40 to 50°C, due to its high vacuum state, some water molecules in the wastewater can be vaporized into water vapor and discharged into the condensation unit.

[0021] After one distillation, viscous wastewater is obtained and discharged into the distillation kettle;

[0022] Adjust the gas pressure inside the distillation vessel to a negative pressure in the range of -95 kPa to -98 kPa, and then heat the distillation vessel.

[0023] Control the rotation of the second scraping mechanism in each group along the central axis of the distillation kettle to stir the viscous wastewater;

[0024] When the temperature inside the distillation vessel reaches 55℃, the highly adsorbent harmful substances can separate from the water molecules, causing the remaining water in the viscous wastewater to be completely vaporized into water vapor and discharged into the condensation unit.

[0025] The water vapor is condensed into liquid water by the condensation unit and then discharged, thus completing the distillation process.

[0026] The beneficial effects of this invention are:

[0027] 1. First, a portion of the water is evaporated through primary distillation. Then, the pressure and temperature are further increased in the distillation vessel, allowing water molecules to separate from the highly adsorbed harmful substances. A staged and intensity-controlled secondary distillation not only saves energy but also improves the distillation efficiency and the separation of harmful substances. Simultaneously, the distillation sphere and distillation vessel are designed as spherical and hemispherical shapes respectively, reducing the bottom area and lowering the probability of sedimentation. Furthermore, the first and second scraping mechanisms respectively stir and scrape the inner walls of both, further reducing waste residue.

[0028] 2. The first crescent-shaped plate slides against the inner wall of the distillation bulb, and the narrower side of the arc surface scrapes off the adsorbed viscous wastewater. Then, taking advantage of the fact that the end of the drainage channel near the wider arc surface is higher than the other end, the viscous wastewater is not only scraped off but also prevents it from settling, allowing it to further contact the stirring rod for agitation and distillation. This not only improves the convenience of subsequent cleaning but also makes the primary distillation more thorough.

[0029] 3. By setting the second crescent plate as a fan-shaped structure, it can be completely fitted to the inner wall of the distillation vessel. A top plate is set on the top of the second crescent plate. By utilizing the sliding fit between the top plate and the top of the distillation vessel, and the characteristic that the thickness of the bottom anti-overflow arc surface near the second crescent plate is less than that at the other end, the splashed wastewater will quickly return to the cavity, while also achieving the function of full contact with the inner wall of the distillation vessel.

[0030] 4. After entering the air inlet, the water vapor is evenly distributed in the condenser tower cavity through the air distribution hopper. Then, the condenser equipment provides refrigerant to each group of condenser nets. Utilizing the characteristic that each group of air channels and each group of condenser nets are arranged in an arithmetic progression, the water vapor can come into contact with the refrigerant no matter which direction it falls from. Furthermore, the condenser net is a grid structure composed of several groups of condenser rings and several groups of condenser rods, which makes condensation faster and more thorough, thereby improving the condensation effect.

[0031] 5. The electric push rod drives the separator and each component distillation incline tube to rise and fall at a uniform speed. When the viscous wastewater enters the distillation incline tube, it moves away from the separator along its inclination angle. Simultaneously, the centrifugal force of the incline tube during its rise and fall intercepts solid waste residue in the viscous wastewater, while the remaining viscous wastewater enters the secondary distillation unit through the outlet. The use of several equally spaced component distillation inclines not only ensures more uniform feeding but also intercepts waste residue, improving the smoothness of the secondary distillation process.

[0032] Other features and advantages of the invention will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the invention. The objects and other advantages of the invention may be realized and obtained by means of the structures pointed out in the description, claims and drawings. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 shows a schematic diagram of a distillation apparatus according to an embodiment of the present invention.

[0035] Figure 2 shows a cross-sectional schematic diagram of a primary distillation unit according to an embodiment of the present invention.

[0036] Figure 3 shows a schematic diagram of the structure of the first scraping mechanism according to an embodiment of the present invention.

[0037] Figure 4 shows a cross-sectional schematic diagram of the material dispensing unit according to an embodiment of the present invention.

[0038] Figure 5 shows a bottom view of the liquid separation hook according to an embodiment of the present invention.

[0039] Figure 6 shows a cross-sectional schematic diagram of a secondary distillation unit according to an embodiment of the present invention.

[0040] Figure 7 shows a bottom view of the anti-overflow tray according to an embodiment of the present invention.

[0041] Figure 8 shows a schematic diagram of the structure of the second scraping mechanism according to an embodiment of the present invention.

[0042] Figure 9 shows a cross-sectional schematic diagram of a condensation unit according to an embodiment of the present invention.

[0043] Figure 10 shows a cross-sectional schematic diagram of a condenser cylinder according to an embodiment of the present invention.

[0044] Figure 11 shows a schematic diagram of the structure of the condenser mesh according to an embodiment of the present invention.

[0045] In the diagram: 100, primary distillation unit; 110, distillation ball; 120, first motor; 130, first high-pressure gas outlet; 140, first liquid inlet; 150, first rotating rod; 160, stirring rod; 170, first scraping mechanism; 171, first crescent plate; 172, arc surface; 173, diversion groove; 180, fixed rod; 200, dispensing unit; 210, dispensing plate; 211, vertical sliding groove; 220, second liquid inlet; 230, bamboo-joint telescopic tube; 240, dispensing kettle; 250, electric push rod; 260, dispensing mechanism; 261, dispensing inclined tube; 262 1. Plane; 263. Liquid outlet; 264. Sliding block; 300. Secondary distillation unit; 310. Distillation kettle; 311. Central opening; 320. Anti-overflow plate; 330. Second motor; 340. Second rotating rod; 341. Second sealed bearing seat; 350. Second scraping mechanism; 351. Second crescent plate; 352. Top plate; 353. Anti-overflow arc surface; 400. Condensation unit; 410. Condensation tower; 411. Air inlet; 412. Gas distribution hopper; 420. Finished product outlet; 430. Condensation cylinder; 440. Condensation mesh; 441. Condensation ring; 442. Condensation rod. Detailed Implementation

[0046] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] This invention provides a wastewater distillation apparatus for chemical raw material intermediates. As exemplarily shown in Figure 1, it includes a primary distillation unit 100, with a distribution unit 200 connected to the bottom of the primary distillation unit 100. The primary distillation unit 100 is used for low-temperature, high-pressure distillation of wastewater. The distribution unit 200 is used to remove impurities from the wastewater after primary distillation.

[0048] The bottom of the material distribution unit 200 is connected to a secondary distillation unit 300. The secondary distillation unit 300 is used to increase the temperature and pressure based on the primary distillation unit 100 to perform secondary distillation.

[0049] A condenser unit 400 is provided on one side of the secondary distillation unit 300. The input end of the condenser unit 400 is connected to the output ends of both the primary distillation unit 100 and the secondary distillation unit 300. The condenser unit 400 is used to condense the distilled water vapor into purified water.

[0050] The condensing unit 400 is provided with a condensing device, a heating device, and a pressure regulating component on one side. The output end of the condensing device is connected to the cavity of the condensing unit 400, the output end of the heating device is connected to the cavities of both the primary distillation unit 100 and the secondary distillation unit 300, and the input end of the pressure regulating component is connected to the cavities of both the primary distillation unit 100 and the secondary distillation unit 300.

[0051] For example, as shown in Figure 2, the primary distillation unit 100 includes a distillation ball 110, which is a spherical structure. A first motor 120 is provided at the center of the top of the distillation ball 110. A first high-pressure gas outlet 130 and a first liquid inlet 140 are respectively provided on both sides of the first motor 120. The output end of the first high-pressure gas outlet 130 is connected to the input end of the condensation unit 400. A first rotating rod 150 is provided vertically along the central axis of the inner cavity of the distillation ball 110. The input end of the first rotating rod 150 is connected to the first motor 120. Several sets of stirring rods 160 are distributed in a circular array on the first rotating rod 150. A first scraping mechanism 170 is installed at the end of the stirring rod 160 away from the first rotating rod 150. A fixed rod 180 is rotatably connected to the bottom of the first rotating rod 150. The bottom of the fixed rod 180 extends to the outside of the distillation ball 110 and is connected to the cavity of the dispensing unit 200.

[0052] For example, a feeding valve is provided at the junction of the fixed rod 180 and the bottom inner wall of the distillation ball 110, and a first sealed bearing seat is provided at the junction of the first rotating rod 150 and the top inner wall of the distillation ball 110.

[0053] For example, as shown in FIG3, the first scraping mechanism 170 includes a first crescent plate 171. The side view of the first crescent plate 171 is a fan-shaped annular structure. The side wall of the first crescent plate 171 away from the first rotating rod 150 is slidably attached to the inner wall of the distillation ball 110. The side wall of the first crescent plate 171 near the first rotating rod 150 is set as an arc surface 172, and the widths of the two sides of the arc surface 172 are different.

[0054] For example, a plurality of groups of drainage channels 173 are arranged at equal intervals along the length of the arc surface 172. The drainage channels 173 are inclined, and the height of the end of the drainage channel 173 closer to the wider arc surface 172 is higher than that of the other end. Both ends of the drainage channel 173 are open structures.

[0055] First, wastewater is poured into the distillation ball 110 through the first inlet 140. Then, the pressure inside the distillation ball 110 is adjusted to a negative pressure between -90 kPa and -93 kPa using a pressure regulating component. The inner cavity of the distillation ball 110 is heated using a heating device. Then, the first motor 120 is turned on, which drives the first rotating rod 150, each set of first stirring rods 160, and each set of first scraping mechanisms 170 to rotate. The first stirring rods 160 are used to stir the wastewater. When the temperature inside the distillation ball 110 reaches the adjusted temperature range of 40 to 50°C, due to the high vacuum state, the water molecules in the wastewater can be vaporized into water vapor and discharged into the condensation unit 400 through the first high-pressure outlet 130.

[0056] As water molecules in the wastewater gradually vaporize, the proportion of water to harmful substances decreases, causing the wastewater to become increasingly viscous and easily adsorbed onto the inner wall of the distillation ball 110. At this point, the first crescent plate 171 slides against the inner wall of the distillation ball 110, and the narrower side of the arc surface 172 scrapes off the adsorbed viscous wastewater. Then, utilizing the characteristic that the wider end of the guide groove 173 near the arc surface 172 is higher than the other end, the viscous wastewater is not only scraped off but also prevents it from settling, allowing it to further contact the stirring rod 160 for stirring and distillation. This not only improves the convenience of subsequent cleaning but also makes the primary distillation more thorough.

[0057] As exemplarily shown in Figure 4, the material distribution unit 200 includes a material distribution plate 210. Several sets of vertical sliding grooves 211 are arranged in a circular array on the inner wall of the material distribution plate 210. The bottom of the material distribution plate 210 has an open structure. A second liquid inlet 220 is provided at the top of the material distribution plate 210, and the top of the second liquid inlet 220 communicates with the bottom of the fixed rod 180. The bottom of the second liquid inlet 220 extends into the material distribution plate 210 and is connected to a bamboo-joint telescopic tube 230. The top of the bamboo-joint telescopic tube 230 is connected to a hemispherical liquid dispensing vessel 240.

[0058] For example, the sidewall of the dispensing vessel 240 is provided with a plurality of dispensing mechanisms 260 arranged in a circular array, the same number as the vertical sliding grooves 211. Each group of dispensing mechanisms 260 is slidably connected to a corresponding group of vertical sliding grooves 211 at the end away from the dispensing vessel 240. An electric push rod 250 is provided on one side of the dispensing vessel 240 in a vertical direction, and the output end of the electric push rod 250 is fixedly connected to the dispensing vessel 240 through a set of crossbars.

[0059] As exemplarily shown in Figure 5, the liquid dispensing mechanism 260 includes a dispensing inclined tube 261. The input end of the dispensing inclined tube 261 is connected to the dispensing vessel 240. The dispensing inclined tube 261 is inclined, and the height of the end closer to the dispensing vessel 240 is higher than that of the other end. A slider 264 is installed at the end of the dispensing inclined tube 261 away from the dispensing vessel 240. The slider 264 is slidably connected in a corresponding set of vertical sliding grooves 211. The bottom of the dispensing inclined tube 261 is set as a plane 262, and several sets of liquid outlets 263 are evenly distributed on the plane 262.

[0060] After primary distillation at a negative pressure between -90 kPa and -93 kPa and a temperature of 40-50°C, the viscous wastewater enters the bamboo-joint telescopic tube 230 through the fixed rod 180, and then enters the separatory vessel 240. The electric push rod 250 is then activated, causing the separatory vessel 240 and each component distillation inclined tube 261 to rise and fall at a uniform speed. Once the viscous wastewater enters the inclined tube 261, it moves away from the separatory vessel 240 along its inclination angle. Simultaneously, the centrifugal force of the inclined tube 261 during its rise and fall intercepts solid waste residue in the viscous wastewater, while the remaining viscous wastewater enters the cavity of the secondary distillation unit 300 through the outlet 263. The use of evenly spaced component distillation inclined tubes 261 not only ensures more uniform feeding but also intercepts waste residue, improving the smoothness of the secondary distillation process.

[0061] For example, as shown in Figures 6 and 7, the secondary distillation unit 300 includes a distillation vessel 310. The bottom of the distillation vessel 310 has a hemispherical structure, and a central opening 311 is provided at the top opening of the distillation vessel 310. The distillation vessel 310 is connected to the distribution plate 210 through the central opening 311. An anti-overflow plate 320 is provided at the bottom of the central opening 311. The anti-overflow plate 320 has a trumpet-shaped structure, and the bottom diameter is smaller than the top diameter. A second motor 330 is provided directly below the distillation vessel 310. A second rotating rod 340 is drivenly connected to the output end of the second motor 330. The top of the second rotating rod 340 extends into the distillation vessel 310, and several sets of second scraping mechanisms 350 are distributed in a circular array at its port.

[0062] For example, a second sealed bearing seat 341 is rotatably connected at the junction of the second rotating rod 340 and the distillation vessel 310. The top of the distillation vessel 310 is provided with a second high-pressure gas outlet, and the output end of the second high-pressure gas outlet is connected to the condensation unit 400.

[0063] For example, as shown in Figure 8, the second scraping mechanism 350 includes a second crescent plate 351. The side view of the second crescent plate 351 is a fan-shaped annular structure, and the side wall of the second crescent plate 351 away from the second rotating rod 340 is slidably attached to the bottom inner wall of the distillation vessel 310. A top plate 352 is installed on the top of the second crescent plate 351. The top of the top plate 352 is slidably attached to the top inner wall of the distillation vessel 310. The bottom of the top plate 352 is provided with an anti-overflow arc surface 353. The thickness of the anti-overflow arc surface 353 near the second crescent plate 351 is less than that at the other end.

[0064] After the viscous wastewater enters the distillation kettle 310, the pressure inside the kettle is adjusted to a negative pressure between -95 kPa and -98 kPa, and the temperature is adjusted to 55°C. Then, the second motor 330 is turned on, driving the second rotating rod 340 and each set of second scraping mechanisms 350 to rotate. Compared to primary distillation, the pressure and temperature of the secondary distillation are further enhanced, allowing highly adsorbed harmful substances to separate from water molecules, ultimately evaporating all the water in the viscous wastewater, leaving only the harmful residue. By first evaporating some water through primary distillation, and then further enhancing the pressure and temperature in the distillation kettle 310 to allow water molecules to separate from highly adsorbed harmful substances, the secondary distillation, performed in a staged and intensity-controlled manner, not only saves energy but also improves the distillation effect and the separation of harmful substances. Meanwhile, the distillation ball 110 and the distillation vessel 310 are respectively set to be spherical and hemispherical to reduce the bottom area and reduce the probability of sedimentation. The first scraping mechanism 170 and the second scraping mechanism 350 are used to stir and scrape the inner walls of the two, which also reduces the residue of waste residue.

[0065] By setting the second crescent plate 351 as a fan-shaped structure, it can be completely fitted to the inner wall of the distillation vessel 310. A top plate 352 is set on the top of the second crescent plate 351. By utilizing the sliding fit between the top plate 352 and the top of the distillation vessel 310, and the characteristic that the thickness of the bottom anti-overflow arc surface 353 near the second crescent plate 351 is less than that at the other end, the splashed wastewater will quickly return to the cavity, and at the same time, it achieves the function of full contact with the inner wall of the distillation vessel 310.

[0066] For example, as shown in Figures 9 and 10, the condensation unit 400 includes a condensation tower 410. The top of the condensation tower 410 is provided with an air inlet 411. The input end of the air inlet 411 is connected to both the first high-pressure air outlet 130 and the second high-pressure air outlet. The bottom of the air inlet 411 extends into the condensation tower 410 and is connected to a funnel-shaped gas distribution hopper 412. The bottom of the condensation tower 410 is provided with a finished product liquid outlet 420.

[0067] For example, within the condensing tower 410, several groups of condensing cylinders 430 are arranged at equal intervals outward from its own central axis, and the diameters of the several groups of condensing cylinders 430 are arranged in an arithmetic progression. The gap between two adjacent groups of condensing cylinders 430 is set as a lower gas channel, and within each group of lower gas channels, several groups of condensing meshes 440 are arranged in an arithmetic progression from the inside out.

[0068] For example, as shown in Figure 11, the condenser mesh 440 includes several sets of condenser rings 441 arranged at equal intervals along the vertical direction. Several sets of condenser rods 442 are connected between adjacent sets of condenser rings 441, and the condenser rods 442 are distributed in a ring array. The cavities of the condenser rings 441 and the condenser rods 442 are all connected to the output end of the condensation device.

[0069] After entering the air inlet 411, the water vapor is evenly distributed in the cavity of the condenser tower 410 through the air distribution hopper 412. Then, the condenser equipment provides refrigerant to each group of condenser nets 440. Utilizing the characteristic that each group of air channels and each group of condenser nets 440 are arranged in an arithmetic progression, the water vapor can come into contact with the refrigerant no matter which direction it falls from. Furthermore, the condenser net 440 is a grid structure composed of several groups of condenser rings 441 and several groups of condenser rods 442, which makes condensation faster and more thorough, thereby improving the condensation effect.

[0070] The above embodiments have the following beneficial effects:

[0071] 1. First, a portion of the water is evaporated through primary distillation. Then, the pressure and temperature are further increased in the distillation vessel 310, allowing water molecules to separate from the highly adsorbed harmful substances. This staged and intensity-controlled secondary distillation not only saves energy but also improves the distillation efficiency and the separation of harmful substances. Simultaneously, the distillation ball 110 and the distillation vessel 310 are respectively designed as spherical and hemispherical shapes to reduce the bottom area and lower the probability of sedimentation. Furthermore, the first scraping mechanism 170 and the second scraping mechanism 350 respectively agitate and scrape the inner walls of both, further reducing waste residue.

[0072] 2. The first crescent plate 171 slides against the inner wall of the distillation ball 110, and the narrower side of the arc surface 172 scrapes off the adsorbed viscous wastewater. Then, taking advantage of the fact that the wider end of the diversion groove 173 near the arc surface 172 is higher than the other end, the viscous wastewater is not only scraped off but also prevents it from settling, allowing it to further contact the stirring rod 160 for stirring and distillation. This not only improves the convenience of subsequent cleaning but also makes the primary distillation more thorough.

[0073] 3. By setting the second crescent plate 351 as a fan-shaped structure, it can be completely fitted to the inner wall of the distillation vessel 310. A top plate 352 is set on the top of the second crescent plate 351. By utilizing the sliding fit between the top plate 352 and the top of the distillation vessel 310, and the characteristic that the thickness of the bottom anti-overflow arc surface 353 near the second crescent plate 351 is less than that at the other end, the splashed wastewater will quickly return to the cavity, and at the same time, it achieves the function of full contact with the inner wall of the distillation vessel 310.

[0074] 4. After entering the air inlet 411, the water vapor is evenly distributed in the cavity of the condenser tower 410 through the air distribution hopper 412. Then, the condenser equipment provides refrigerant to each group of condenser nets 440. Utilizing the characteristic that each group of downward air channels and each group of condenser nets 440 are arranged in an arithmetic progression, the water vapor can come into contact with the refrigerant no matter which direction it falls from. Furthermore, the condenser net 440 is a mesh structure composed of several groups of condenser rings 441 and several groups of condenser rods 442, which makes condensation faster and more thorough, thereby improving the condensation effect.

[0075] 5. The electric push rod 250 drives the separator 240 and each component distillation incline tube 261 to rise and fall at a uniform speed. When the viscous wastewater enters the distillation incline tube 261, it moves away from the separator 240 along its inclination angle. Simultaneously, the centrifugal force of the distillation incline tube 261 during its rise and fall intercepts solid waste residue in the viscous wastewater, while the remaining viscous wastewater enters the cavity of the secondary distillation unit 300 through the outlet 263. The use of several equally spaced component distillation inclines tubes 261 not only ensures more uniform feeding but also intercepts waste residue, improving the smoothness of the secondary distillation process.

[0076] Based on the aforementioned distillation equipment for chemical raw material intermediate wastewater, this invention also proposes a distillation method for the distillation device. Exemplarily, the distillation method includes:

[0077] Wastewater is poured into the distillation bulb through the first inlet. Then, the pressure inside the distillation bulb is adjusted to a negative pressure between -90 kPa and -93 kPa using a pressure regulating component. The inner cavity of the distillation bulb is then heated using a heating device.

[0078] Start the first motor, which drives each group of first scraper mechanisms to rotate, thereby agitating the wastewater;

[0079] When the temperature inside the distillation bulb reaches the range of 40 to 50°C, due to its high vacuum state, some water molecules in the wastewater can be vaporized into water vapor and discharged into the condensation unit.

[0080] After one distillation, viscous wastewater is obtained, and the viscous wastewater is discharged into the material distribution unit for waste residue removal.

[0081] After completion, the viscous wastewater falls evenly into the distillation kettle;

[0082] Adjust the gas pressure inside the distillation vessel to a negative pressure in the range of -95 kPa to -98 kPa, and then heat the distillation vessel.

[0083] Start the second motor, which drives each group of second scraping mechanisms to rotate, thereby stirring the viscous wastewater;

[0084] When the temperature inside the distillation vessel reaches 55℃, the highly adsorbent harmful substances can separate from the water molecules, causing the remaining water in the viscous wastewater to be completely vaporized into water vapor and discharged into the condensation unit.

[0085] The water vapor is condensed into liquid water by the condensation unit and then discharged, thus completing the distillation process.

[0086] 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 of the technical features; and these modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A distillation apparatus for wastewater from chemical raw material intermediates, comprising a primary distillation unit (100) and a condensation unit (400), wherein a secondary distillation unit (300) is connected to the bottom of the primary distillation unit (100), characterized in that: The primary distillation unit (100) includes a spherical distillation ball (110), with a first rotating rod (150) rotatably connected inside the distillation ball (110). Several sets of first scraping mechanisms (170) are arranged in a circular array around the first rotating rod (150). The secondary distillation unit (300) includes a distillation vessel (310) with a hemispherical bottom. A second rotating rod (330) is provided inside the distillation vessel (310), with several sets of second scraping mechanisms (170) arranged in a circular array around the second rotating rod (330). The scraping mechanism (350) is used; the distillation ball (110) and the distillation kettle (310) are both connected to the condensing unit (400); firstly, low-temperature negative pressure distillation is carried out through the primary distillation unit (100), and then the temperature and vacuum are increased accordingly by the secondary distillation unit (300) to realize the staged distillation of wastewater. Moreover, by stirring and scraping the walls of the spherical and hemispherical distillation balls (110) and the distillation kettle (310), energy consumption is reduced and distillation is more thorough; the primary distillation unit (100) and the secondary distillation unit (300) are connected to the condensing unit (400). A material distribution unit (200) is connected between 0) and 100. The material distribution unit (200) includes a material distribution plate (210). Several sets of vertical sliding grooves (211) are distributed in a circular array on the inner wall of the material distribution plate (210). The bottom of the material distribution plate (210) is an open structure. A second liquid inlet (220) is provided at the top of the material distribution plate (210). The bottom of the second liquid inlet (220) extends into the material distribution plate (210) and is connected to a bamboo-joint telescopic tube (230). The top of the bamboo-joint telescopic tube (230) is connected to the material distribution unit (200). A liquid separator (240) with a hemispherical structure is connected; a number of liquid separation mechanisms (260) are arranged in a ring array on the side wall of the liquid separator (240) in the same number as the vertical sliding grooves (211), and the end of each liquid separation mechanism (260) away from the liquid separator (240) is slidably connected in a corresponding set of vertical sliding grooves (211); an electric push rod (250) is provided on one side of the liquid separator (240) in the vertical direction, and the output end of the electric push rod (250) is fixedly connected to the liquid separator (240) through a set of crossbars.

2. The distillation equipment for chemical raw material intermediate wastewater according to claim 1, characterized in that: The distillation ball (110) is provided with a first motor (120) at the top center. The first motor (120) is provided with a first high-pressure gas outlet (130) and a first liquid inlet (140) on both sides. The input end of the first rotating rod (150) is connected to the first motor (120) for transmission. Each set of the first scraping mechanism (170) and the first rotating rod (150) is connected to a set of stirring rods (160).

3. The distillation equipment for chemical raw material intermediate wastewater according to claim 1, characterized in that: The first scraping mechanism (170) includes a first crescent plate (171), the side view of the first crescent plate (171) is a fan-shaped annular structure, the side wall of the first crescent plate (171) away from the first rotating rod (150) slides against the inner wall of the distillation ball (110); the side wall of the first crescent plate (171) near the first rotating rod (150) is set as an arc surface (172), the widths of the two sides of the arc surface (172) are different.

4. The chemical raw material intermediate wastewater distillation equipment according to claim 3, characterized in that: Several groups of drainage channels (173) are arranged at equal intervals along the length of the arc surface (172). The drainage channels (173) are inclined, and the height of the end of the drainage channel (173) that is wider than the arc surface (172) is higher than the other end. Both ends of the drainage channel (173) are open structures.

5. The chemical raw material intermediate wastewater distillation equipment according to claim 1, characterized in that: The second scraping mechanism (350) includes a second crescent plate (351), the side view of which is a fan-shaped structure. A top plate (352) is installed on the top of the second crescent plate (351), and an anti-overflow arc surface (353) is provided at the bottom of the top plate (352). The thickness of the anti-overflow arc surface (353) near the second crescent plate (351) is less than that at the other end.

6. The chemical raw material intermediate wastewater distillation equipment according to claim 1, characterized in that: The condensation unit (400) includes a condensation tower (410), the top of which is provided with an air inlet (411), the bottom of which extends into the condensation tower (410) and is connected to a funnel-shaped gas distribution hopper (412); the bottom of the condensation tower (410) is provided with a finished product liquid outlet (420).

7. The distillation equipment for chemical raw material intermediate wastewater according to claim 6, characterized in that: The condenser tower (410) has several sets of condenser cylinders (430) arranged at equal intervals outward from its own central axis. The diameters of the several sets of condenser cylinders (430) are arranged in an arithmetic progression. The gap between two adjacent sets of condenser cylinders (430) is set as a lower gas channel. In each set of lower gas channels, several sets of condenser meshes (440) are arranged in an arithmetic progression from the inside to the outside.

8. A distillation method applied to the distillation equipment for chemical raw material intermediate wastewater as described in any one of claims 1-7, characterized in that: The distillation method includes: pouring wastewater into a distillation ball, adjusting the pressure inside the distillation ball to a negative pressure between -90 kPa and -93 kPa, and heating the inner cavity of the distillation ball; controlling the rotation of each group of first scraping mechanisms along the central axis of the distillation ball to stir the wastewater; when the temperature inside the distillation ball is adjusted to the range of 40 to 50°C, due to its high vacuum state, some water molecules in the wastewater are vaporized into water vapor and discharged into the condensation unit; after one distillation, viscous wastewater is obtained, and the viscous wastewater is then... Wastewater is discharged into a distillation kettle; the pressure inside the distillation kettle is adjusted to a negative pressure between -95 kPa and -98 kPa, and the distillation kettle is heated; the second scraping mechanism of each group is controlled to rotate along the central axis of the distillation kettle to stir the viscous wastewater; when the temperature inside the distillation kettle is adjusted to 55℃, the highly adsorbent harmful substances are separated from the water molecules, so that the remaining water in the viscous wastewater is completely vaporized into water vapor and discharged into the condensation unit; the water vapor is condensed into liquid water through the condensation unit and then discharged, and the distillation process is completed.

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