Polyaluminum chloride production device

Abstract

The utility model relates to the field of polyaluminum chloride production, and particularly discloses a polyaluminum chloride production device, which comprises a reaction unit for preparing polyaluminum chloride stock solution through reaction; the screening unit is connected with the reaction unit through a pipeline and is used for screening out solid waste in the polyaluminum chloride stock solution; the heating unit is connected with the reaction unit through a pipeline and is used for assisting in heating air by using waste gas of the reaction unit; the atomization drying unit is connected with the reaction unit through a pipeline and is used for drying the polyaluminum chloride stock solution; and the spraying adsorption unit is connected with the heating unit through a pipeline and is used for treating waste gas generated by the reaction. The reaction unit fully mixes raw materials, the screening unit filters solid waste in a stock solution, so that the utilization rate of the raw materials and the purity of products are greatly improved, the heating unit utilizes high-temperature waste gas to assist in heating air, the energy consumption of equipment is reduced, and the waste gas is treated by the spraying adsorption unit, so that the waste gas reaches the emission standard.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of polyaluminium chloride production, and specifically relates to a polyaluminium chloride production device. BACKGROUND

[0002] Polyaluminium chloride (PAC for short) is a kind of efficient inorganic polymer coagulant, which forms polynuclear complex through hydroxyl bridging, has strong electric neutralization and adsorption bridging capacity. Its form is divided into liquid (light yellow or colorless) and solid (yellow / brown particles), and it is widely used in drinking water purification, industrial wastewater treatment, papermaking sizing, medicine and cosmetics and other fields. Compared with traditional coagulants (such as aluminum sulfate), PAC has the advantages of fast flocculation, high sedimentation efficiency, wide pH range (5-9), small dosage (saving cost 20%-50%) and the like, and the treated water has low turbidity and low residual aluminum content, so it is an environmental protection type water treatment core material.

[0003] The existing polyaluminium chloride production device mainly has the problems of many impurities in raw materials, low product purity, low equipment efficiency (such as incomplete filtration and waste heat recovery), high energy consumption, heavy pollution and long reaction time, which leads to low production efficiency, and process upgrading and environmental protection technology integration optimization are urgently needed.

[0004] Therefore, a polyaluminium chloride production device is needed to solve the problems of high energy consumption, low energy utilization rate, low product purity, heavy pollution and low efficiency of the existing polyaluminium chloride production device. UTILITY MODEL CONTENTS

[0005] In view of this, the utility model provides a polyaluminium chloride production device, which aims at solving the problems of high energy consumption, low energy utilization rate, low product purity, heavy pollution and low efficiency of the existing polyaluminium chloride production device.

[0006] The utility model provides a polyaluminium chloride production device, which is characterized by comprising:

[0007] The reaction unit is a round pot, and the reaction unit is used for preparing polyaluminium chloride stock solution;

[0008] The screening unit is a square box body, which is connected with the reaction unit through a pipeline, and the screening unit is used for screening solid waste in the polyaluminium chloride stock solution;

[0009] The atomization and drying unit is a pot body with a cylindrical upper part and a conical lower part, which is connected with the screening unit through a pipeline, and the atomization and drying unit is used for atomizing and drying the polyaluminium chloride stock solution;

[0010] The heating unit is connected with the reaction unit through a pipeline, the bottom surface of the heating unit is communicated with the top surface of the atomization and drying unit, and the heating unit is used for assisting heating air with high-temperature waste gas of the reaction unit.

[0011] A spray adsorption unit is a square box connected with the heating unit through a pipeline, and is used for treating the acidic waste gas generated in the reaction.

[0012] Further, the polyaluminum chloride production device comprises:

[0013] A reaction bin is a tank;

[0014] A spiral flow guide groove is a groove formed on the inner wall of the reaction bin, and the spiral flow guide groove extends in a spiral shape from the top of the inner wall of the reaction bin to the bottom of the inner wall of the reaction bin;

[0015] A first feeding port is formed on the top surface of the reaction bin and is used for adding reaction raw materials;

[0016] A first exhaust port is formed on the top surface of the reaction bin and is used for discharging the waste gas generated in the reaction;

[0017] A first driving motor is arranged on the top surface of the reaction bin;

[0018] A first rotating shaft is arranged in the reaction bin, one end of the first rotating shaft penetrates through the top surface of the reaction bin and is connected with the output end of the first driving motor, and a plurality of stirring columns are uniformly arranged on the shaft body of the first rotating shaft, and the stirring columns are used for stirring and mixing the reaction raw materials;

[0019] A first discharging port is formed on the bottom of the reaction bin and is used for discharging the polyaluminum chloride stock solution generated after the reaction is completed.

[0020] Further, the screening unit comprises:

[0021] A screening bin is a square box;

[0022] A second feeding port is formed on the top surface of the screening bin, and the second feeding port is connected with the first discharging port through a pipeline;

[0023] Two vibration motors are arranged on one outer side wall of the screening bin;

[0024] A first sieve plate is arranged below the second feeding port, one end of the first sieve plate penetrates through the inner wall of the screening bin and is connected with the output end of one vibration motor, and the first sieve plate is used for primary screening of the polyaluminum chloride stock solution;

[0025] A second sieve plate is arranged below the first sieve plate, one end of the second sieve plate penetrates through the inner wall of the screening bin and is connected with the output end of another vibration motor, and the second sieve plate is used for secondary screening of the polyaluminum chloride stock solution;

[0026] A first baffle is arranged below the second screen plate, the first baffle is arranged in a direction perpendicular to the screen plate, two sides of the first baffle are connected with two inner sides of the screening bin respectively, and a bottom surface of the first baffle is connected with a bottom surface of the screening bin;

[0027] A second discharge port is arranged on the bottom surface of the screening bin;

[0028] Two second baffles are arranged below the second screen plate, one end of each of the two second baffles is arranged on opposite sides of the screening bin and the first baffle, and the other end of each of the two second baffles is connected with the second discharge port, and the second baffles are used for guiding the screened polyaluminum chloride solution into the second discharge port;

[0029] A filter residue bin is arranged on the bottom surface of the screening bin, one side wall of the filter residue bin is in contact with the other side of the first baffle, and the other side wall is embedded in the side wall of the screening bin, and the filter residue bin is used for collecting the solid filter residue falling from the first screen plate and the second screen plate.

[0030] Further, one end of the first screen plate and the second screen plate close to the vibration motor is flexibly connected with the inner wall of the screening bin through a flexible sealing gasket, the flexible sealing gasket is used for preventing the overflow of the raw solution in the screening bin and ensuring the normal vibration of the first screen plate and the second screen plate.

[0031] Further, a plurality of first grooves are uniformly arranged on the top surface of the first screen plate in a direction parallel to the side wall of the screening bin, the first grooves are trapezoidal, and a bottom surface of each of the first grooves is uniformly provided with a plurality of first screen holes; a plurality of second grooves are uniformly arranged on the top surface of the second screen plate in a direction parallel to the side wall of the screening bin, the second grooves are trapezoidal, and a bottom surface of each of the second grooves is uniformly provided with a plurality of second screen holes.

[0032] Further, the atomization and drying unit comprises:

[0033] The drying bin is a cylindrical tank body at the top and a conical tank body at the bottom;

[0034] A third feeding port is arranged on the top surface of the drying bin, and the third feeding port is in communication with the second discharge port through a pipeline;

[0035] A third discharge port is arranged on the bottom surface of the drying bin, and the third discharge port is used for conveying the dried polyaluminum chloride;

[0036] A second driving motor is arranged at the center position of the top surface of the drying bin;

[0037] The atomizer is circular and arranged on the inner side of the top of the drying bin. The atomizer is connected with the third feeding port. The bottom of the atomizer is uniformly provided with a plurality of spray ports for spraying the atomized polyaluminum chloride stock solution.

[0038] The second rotating shaft is a cylindrical shaft body and arranged in the drying bin. One end of the second rotating shaft penetrates the center of the atomizer and is connected with the output end of the second driving motor.

[0039] The air inlet is arranged on the top of the drying bin.

[0040] The hot air distributor is circular and sleeved on the outer side wall of the atomizer. The top of the hot air distributor is connected with the inner side of the top of the drying bin. The hot air distributor is connected with the air inlet. The bottom of the hot air distributor is uniformly provided with a plurality of inclined air outlets for blowing hot air to form a spiral air duct.

[0041] The scraper 353 is in contact with the inner side wall of the drying bin. The scraper 353 is connected with the rotating shaft through the connecting rod.

[0042] The air guide fan is arranged on the lower side wall of the drying bin. The air guide fan is used for extracting air in the drying bin. One end of the air guide fan embedded in the drying bin is provided with a filter screen for preventing the dried polyaluminum chloride from being sucked out.

[0043] Further, the bottom of the second rotating shaft is provided with a spiral rod. The bottom of the spiral rod extends into the third discharging port. The spiral rod is used for crushing and conveying the dried polyaluminum chloride.

[0044] Further, the heating unit comprises:

[0045] The waste heat recovery device is cylindrical. The waste heat recovery device is used for preliminarily heating air.

[0046] The heating device is connected with the waste heat recovery device at one end and connected with the air inlet at the other end. The heating device is used for twice heating hot air.

[0047] Further, the waste heat recovery device comprises:

[0048] The heat insulation cylinder is a cylindrical shape penetrating from top to bottom.

[0049] The second exhaust port is arranged on the bottom side wall of the heat insulation cylinder.

[0050] The exhaust pipe is embedded on the inner side of the heat insulation cylinder. One end of the exhaust pipe is connected with the first exhaust port, and the other end is connected with the second exhaust port. The exhaust pipe is used for conveying high-temperature exhaust gas generated by the reaction.

[0051] Further, the spray adsorption unit comprises:

[0052] The spray adsorption chamber is a square box body.

[0053] The gas inlet is arranged on one outer side wall of the spray adsorption chamber, and the gas inlet is communicated with the second gas outlet.

[0054] The liquid inlet is arranged on one side of the top surface of the spray adsorption chamber.

[0055] The first partition plate is arranged in the center of the spray adsorption chamber, and the top surface and the bottom surface of the partition plate are connected with the top surface and the bottom surface of the spray adsorption chamber respectively, and the partition plate is used to divide the spray adsorption chamber into two parts.

[0056] The spray device is arranged on one side of the first partition plate, and the top surface of the spray device is connected with the top surface of the spray adsorption chamber, and the spray device is communicated with the liquid inlet; the bottom surface of the spray device is uniformly provided with a plurality of spray heads, and the spray heads are used to spray the liquid mist.

[0057] The liquid outlet is arranged below the spray device, and the liquid outlet is arranged on the bottom surface of the spray adsorption chamber, and the liquid outlet is used to discharge the liquid after spraying.

[0058] The third baffle is arranged below the spray device, and one end of the third baffle is arranged on the inner side surface of the spray adsorption chamber and the side surface of the first partition plate respectively, and the other end is connected with the liquid outlet hole, and the third baffle is used to guide the liquid to flow into the liquid outlet.

[0059] The second partition plate and the third partition plate are arranged on the other side of the first partition plate in sequence and parallel to each other, the top surface of the first partition plate is connected with the top surface of the spray adsorption chamber, the bottom surface of the third partition plate is connected with the bottom surface of the spray adsorption chamber, and the first partition plate, the second partition plate and the third partition plate are filled with activated carbon.

[0060] The third gas outlet is arranged on the outer side surface of the spray adsorption chamber which is parallel to the third partition plate and close to the third partition plate, and the third gas outlet is used to discharge the waste gas after being adsorbed by the activated carbon.

[0061] Compared with existing technologies, the beneficial effects of this utility model are as follows: By setting up a reaction unit, the reaction raw materials are guided to form a spiral vortex, which greatly improves the mixing efficiency, shortens the reaction time, and improves the production efficiency; by atomizing and drying the polyaluminum chloride raw solution, the polyaluminum chloride can fully contact the hot air, which greatly improves the drying efficiency; by setting up a screening unit to screen the polyaluminum chloride raw solution multiple times, the purity of the product is improved; by setting up a heating unit, the high-temperature waste gas generated by the reaction is used to assist in heating the hot air required for drying, which greatly reduces energy consumption; by setting up a spray adsorption unit, the waste gas is treated by spraying and activated carbon adsorption in sequence, so that the waste gas meets the emission standards, which greatly improves the environmental protection. Attached Figure Description

[0062] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0063] Figure 1 An overall connection diagram of a polyaluminum chloride production apparatus provided in one embodiment of this utility model;

[0064] Figure 2 A cross-sectional view of the internal structure of the reaction provided in one embodiment of the present invention;

[0065] Figure 3 A cross-sectional view of the internal structure of a screening unit provided in one embodiment of the present invention;

[0066] Figure 4 for Figure 3 A magnified view of a portion of region A in the middle;

[0067] Figure 5 This is a cross-sectional view of the internal structure of an atomizing drying unit provided in one embodiment of the present invention;

[0068] Figure 6 A three-dimensional structural diagram of an atomizer and a hot air distributor provided in one embodiment of the present invention;

[0069] Figure 7 A perspective structural diagram of a waste heat recovery device provided in one embodiment of this utility model;

[0070] Figure 8 This is a cross-sectional view of the internal structure of a spray adsorption unit provided in one embodiment of the present invention.

[0071] In the figure: 100 - reaction unit; 110 - first feeding port; 120 - first exhaust port; 130 - first discharging port; 140 - reaction bin; 141 - spiral guide groove; 150 - first driving motor; 160 - first rotating shaft; 161 - stirring column; 200 - screening unit; 210 - second feeding port; 220 - second discharging port; 230 - first sieve plate; 231 - first groove; 232 - first sieve hole; 240 - second sieve plate; 241 - second groove; 242 - second sieve hole; 250 - vibrating motor; 260 - screening bin; 261 - flexible sealing gasket; 262 - first baffle; 263 - second baffle; 270 - residue filtering bin; 300 - atomization drying unit; 310 - third feeding port; 320 - air inlet; 330 - atomizer; 331 - nozzle; 340 - hot air distributor; 341 - air outlet; 350 - second driving motor; 351 - second rotating shaft; 352 - connecting rod; 353 - scraper; 360 - induced draft fan; 361 - filter screen; 370 - spiral rod; 380 - third discharging port; 390 - drying bin; 400 - spraying adsorption unit; 410 - air inlet; 420 - third exhaust port; 430 - spraying device; 431 - spraying head; 440 - third baffle; 450 - spraying adsorption bin; 451 - first partition plate; 452 - second partition plate; 453 - third partition plate; 460 - liquid outlet; 500 - heating unit; 510 - waste heat recovery device; 511 - heat insulation cylinder; 512 - waste gas pipeline; 513 - second exhaust port; 520 - heating device. DETAILED DESCRIPTION

[0072] The specific embodiments of the present application will be further described in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present application, but not to limit the scope of the present application.

[0073] In the description of the present application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation; be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the present application.

[0074] The terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, unless otherwise stated, the meaning of "a plurality of" is two or more.

[0075] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral connection, it can be mechanical connection, or electrical connection, it can be direct connection, or indirect connection through intermediate medium, or internal connection of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0076] Referring to Figures 1-8 As shown in some embodiments of the utility model, the polyaluminum chloride production device comprises:

[0077] The reaction bin 140 is a tank body;

[0078] The spiral flow guide groove 141 is a groove formed on the inner wall of the reaction bin 140, and the spiral flow guide groove 141 extends in a spiral shape from the top of the inner wall of the reaction bin 140 to the bottom of the inner wall of the reaction bin 140;

[0079] The first feeding port 110 is formed on the top surface of the reaction bin 140 and is used for adding reaction raw materials;

[0080] The first exhaust port 120 is formed on the top surface of the reaction bin 140 and is used for discharging waste gas generated by the reaction;

[0081] The first driving motor 150 is arranged on the top surface of the reaction bin 140;

[0082] The first rotating shaft 160 is arranged inside the reaction bin 140, one end of the first rotating shaft 160 penetrates through the top surface of the reaction bin 140 and is connected with the output end of the first driving motor 150, and a plurality of stirring columns 161 are uniformly arranged on the shaft body of the first rotating shaft 160, and the stirring columns 161 are used for stirring and mixing the reaction raw materials;

[0083] The first discharging port 130 is formed on the bottom of the reaction bin 140 and is used for discharging the polyaluminum chloride stock solution generated after the reaction is completed.

[0084] It can be understood that the spiral flow guide groove 141 arranged on the inner wall of the reaction bin 140 cooperates with the rotating stirring column 161 to form a spiral vortex of the reaction raw materials, greatly improves the mixing efficiency, and shortens the reaction time.

[0085] It can be understood that the reaction raw materials enter the reaction unit 100 from the first feeding port 110, generate the polyaluminum chloride stock solution and produce high-temperature waste gas after being fully stirred and reacted, and then the polyaluminum chloride stock solution is discharged from the first discharging port 130 and enters the screening unit 200, and the high-temperature waste gas enters the waste gas pipeline 512 through the first exhaust port 120.

[0086] Referring to Figures 1-8As shown, in some embodiments of the utility model, the screening unit 200 includes:

[0087] The screening bin 260 is a square box body.

[0088] The second feeding port 210 is arranged on the top surface of the screening bin 260, and the second feeding port 210 is connected with the first discharging port 130 through a pipeline.

[0089] The vibration motor 250 is arranged on one outer side wall of the screening bin 260.

[0090] The first sieve plate 230 is arranged below the second feeding port 210, one end of the first sieve plate 230 is connected with the output end of one vibration motor 250 through the inner wall of the screening bin 260, and the first sieve plate 230 is used for primary screening of the polyaluminum chloride stock solution.

[0091] The second sieve plate 240 is arranged below the first sieve plate 230, one end of the second sieve plate 240 is connected with the output end of another vibration motor 250 through the inner wall of the screening bin 260, and the second sieve plate 240 is used for secondary screening of the polyaluminum chloride stock solution.

[0092] The first baffle plate 262 is arranged below the second sieve plate 240, the first baffle plate 262 is arranged in a direction perpendicular to the sieve plate, the two side surfaces of the first baffle plate 262 are connected with the two inner side surfaces of the screening bin 260 respectively, and the bottom surface of the first baffle plate 262 is connected with the bottom surface of the screening bin 260.

[0093] The second discharging port 220 is arranged on the bottom surface of the screening bin 260.

[0094] The second baffle plate 263 is arranged below the second sieve plate 240, one end of each of the two second baffle plates 263 is arranged on the opposite side surface of the screening bin 260 and the first baffle plate 262 respectively, and the other end of each of the two second baffle plates 263 is connected with the second discharging port 220, and the second baffle plate 263 is used for guiding the screened polyaluminum chloride solution into the second discharging port 220.

[0095] The filter residue bin 270 is a square box body with an open top, and is arranged on the bottom surface of the screening bin 260, one side wall of the filter residue bin 270 is in contact with the other side of the first baffle plate 262, and the other corresponding side wall is embedded in the side wall of the screening bin 260, and the filter residue bin 270 is used for collecting the solid filter residue falling from the first sieve plate 230 and the second sieve plate 240.

[0096] Specifically, the first sieve plate 230 is arranged in an upward inclination, and the angle is preferably 5°, and the inclination arrangement can ensure that the falling polyaluminum chloride stock solution will not splash into the filter residue bin 270.

[0097] Specifically, the polyaluminum chloride stock solution enters the inside of the screening bin 260 from the second feed port 210, first falls into the first sieve plate 230 for primary vibration screening, then falls into the second sieve plate 240 for secondary vibration screening, and finally falls into the second discharge port 220, while the solid filter residues on the first sieve plate 230 and the second sieve plate 240 gradually move to the edges of the first sieve plate 230 and the second sieve plate 240 due to vibration and then fall into the filter residue bin 270.

[0098] Referring to Figures 1-8 As shown in the drawings, in some embodiments provided by the utility model, the first sieve plate 230 and the second sieve plate 240 are flexibly connected with the inner wall of the screening bin 260 through the flexible sealing gasket 261 at one end close to the vibration motor 250, the flexible sealing gasket 261 is used for preventing the stock solution in the screening bin 260 from overflowing and ensuring the normal vibration of the first sieve plate 230 and the second sieve plate 240; a plurality of first grooves 231 are uniformly arranged on the top surface of the first sieve plate 230 along the direction parallel to the side wall of the screening bin 260, the first grooves 231 are trapezoidal, and a plurality of first sieve holes 232 are uniformly arranged on the bottom surface of each first groove 231; a plurality of second grooves 241 are uniformly arranged on the top surface of the second sieve plate 240 along the direction parallel to the side wall of the screening bin 260, the second grooves 241 are trapezoidal, and a plurality of second sieve holes 242 are uniformly arranged on the bottom surface of each second groove 241.

[0099] It can be understood that the flexible connection of the first sieve plate 230 and the second sieve plate 240 with the inner wall of the screening bin 260 ensures that the first sieve plate 230 and the second sieve plate 240 are not blocked by the inner wall of the screening bin 260 when vibrating.

[0100] Specifically, the aperture of the first sieve hole 232 is larger than the aperture of the second sieve hole 242.

[0101] It can be understood that the arrangement of the first grooves 231 and the second grooves 241 ensures that the filter residues can be stably moved to the edges of the first sieve plate 230 and the second sieve plate 240 through vibration and then fall into the filter residue bin 270.

[0102] Referring to Figures 1-8 As shown in the drawings, in some embodiments provided by the utility model, the atomization and drying unit 300 comprises:

[0103] The drying bin is a cylindrical tank body with a conical bottom;

[0104] The third feed port 310 is arranged on the top surface of the drying bin, and the third feed port 310 is in communication with the second discharge port 220 through a pipeline;

[0105] The third discharge port 380 is arranged on the bottom surface of the drying bin, and is used for conveying the dried polyaluminum chloride;

[0106] The second driving motor 350 is arranged at the center position of the top surface of the drying bin;

[0107] The atomizer 330 is arranged on the inner side of the top of the drying chamber, and is connected with the third feeding port 310.

[0108] The second rotating shaft 351 is a cylindrical shaft body arranged in the drying chamber, and is connected with the output end of the second driving motor 350 at one end.

[0109] The air inlet 320 is arranged on the top of the drying chamber.

[0110] The hot air distributor 340 is a circular ring type, and is arranged on the outer wall of the atomizer 330, and the top of the hot air distributor 340 is connected with the inner side of the top of the drying chamber.

[0111] The scraper 353 is in contact with the inner wall of the drying chamber, and the scraper 353 is connected with the rotating shaft through the connecting rod 352.

[0112] The air inducer 360 is arranged on the lower side wall of the drying chamber, and is used for sucking the air in the drying chamber.

[0113] Specifically, the filtered polyaluminum chloride is sprayed into the atomizer 330 through the third feeding port 310, and is sprayed out by the atomizer 330 and fully contacts with the hot air sprayed out by the hot air distributor 340, and is dried into a solid.

[0114] It can be understood that the air inducer 360 is arranged to make the drying chamber always in a negative pressure state, and the external air is evenly divided into multiple air streams through the hot air distributor 340 and enters the drying chamber.

[0115] It can be understood that the inclined arrangement of the air outlet 341 makes the multiple air streams move downward in a spiral shape, which can fully wrap the atomized polyaluminum chloride solution, and improve the drying efficiency.

[0116] Referring to FIG. 1, Figures 1-8 It can be understood that the bottom of the second rotating shaft 351 is provided with a spiral rod 370, the bottom of the spiral rod 370 extends into the third discharging port 380, and the spiral rod 370 is used for crushing and conveying the dried polyaluminum chloride.

[0117] Understandably, the dried polyaluminum chloride falls into the third discharge port 380, where it is crushed and transported to the outside by the rotating shaft, effectively preventing the discharge port from getting blocked and improving transportation efficiency.

[0118] See Figures 1-8 As shown, in some embodiments provided by this utility model, the heating unit 500 includes:

[0119] Waste heat recovery device 510 is cylindrical and is used for preliminary heating of air;

[0120] The heating device 520 is connected at one end to the waste heat recovery device 510 and at the other end to the air inlet 320. The heating device 520 is used to reheat the hot air.

[0121] Waste heat recovery device 510 includes:

[0122] The heat insulation cylinder 511 is a cylindrical shape that runs through the top and bottom.

[0123] The second exhaust port 513 is located on the bottom side wall of the heat insulation cylinder 511;

[0124] The exhaust gas pipeline 512 is embedded in the inner side of the heat insulation cylinder 511. One end of the exhaust gas pipeline 512 is connected to the first exhaust port 120, and the other end is connected to the second exhaust port 513. The exhaust gas pipeline 512 is used to transport the high-temperature exhaust gas generated by the reaction.

[0125] Specifically, both the heat insulation cylinder 511 and the exhaust gas pipeline 512 are made of heat insulation material. The high-temperature exhaust gas generated in the reaction unit 100 enters the exhaust gas pipeline 512 through the first exhaust port 120. The outside air is initially heated by the exhaust gas pipeline 512 embedded in the heat insulation cylinder 511 and then enters the heating device 520. After being reheated to the set temperature, it enters the hot air distributor 340.

[0126] See Figures 1-8 As shown, in some embodiments provided by this utility model, the spray adsorption unit 400 includes:

[0127] The spray adsorption chamber 450 is a square box.

[0128] An air inlet 410 is located on an outer side wall of the spray adsorption chamber 450, and the air inlet 410 is connected to the second exhaust port.

[0129] The liquid inlet is located on one side of the top surface of the spray adsorption chamber at 450 mm.

[0130] The first partition plate 451 is provided with a downwardly inclined through hole at the top, and is arranged at the center of the spray adsorption chamber 450. The top surface and the bottom surface of the partition plate are connected with the top surface and the bottom surface of the spray adsorption chamber 450 respectively, and the partition plate is used to divide the spray adsorption chamber 450 into two parts.

[0131] The spray device 430 is arranged at one side of the first partition plate 451, and the top surface of the spray device 430 is connected with the top surface of the spray adsorption chamber 450. The spray device 430 is connected with the liquid inlet in communication. The bottom surface of the spray device 430 is uniformly provided with a plurality of spray heads 431, and the spray heads 431 are used to spray the liquid mist.

[0132] The liquid outlet 460 is arranged below the spray device 430, and is arranged on the bottom surface of the spray adsorption chamber 450. The liquid outlet 460 is used to discharge the liquid after spraying.

[0133] The third baffle plate 440 is arranged below the spray device 430, and the two third baffle plates 440 are arranged at one end of the inner side surface of the spray adsorption chamber 450 and the side surface of the first partition plate 451 respectively, and the other end is connected with the liquid outlet hole. The third baffle plate 440 is used to guide the liquid to flow into the liquid outlet 460.

[0134] The second partition plate 452 and the third partition plate 453 are arranged in parallel at the other side of the first partition plate 451 in sequence. The top surface of the first partition plate 451 is connected with the top surface of the spray adsorption chamber 450, and the bottom surface of the third partition plate 453 is connected with the bottom surface of the spray adsorption chamber 450. The first partition plate 451, the second partition plate 452 and the third partition plate 453 are filled with activated carbon.

[0135] The third exhaust port 420 is arranged on the outer side surface of the spray adsorption chamber 450 which is parallel to the third partition plate 453 and close to the third partition plate 453. The third exhaust port 420 is used to discharge the waste gas after being adsorbed by the activated carbon.

[0136] Specifically, the sprayed liquid is 10% sodium hydroxide solution.

[0137] It can be understood that the acidic waste gas enters the spray adsorption chamber 450 through the air inlet 410, and the 10% sodium hydroxide solution is sprayed from the spray device 430 above to neutralize the acidic waste gas. The residual acidic waste gas enters the activated carbon through the through hole above the first partition plate 451 and is adsorbed in layers, and finally is discharged from the third exhaust port 420.

[0138] It can be understood that the inclined through hole on the first partition plate 451 can effectively prevent the sprayed liquid from entering the activated carbon.

[0139] Those skilled in the art can understand that the above only describes preferred embodiments of the present application, and is not intended to limit the present application. Although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace some of the technical features. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A polyaluminum chloride production apparatus, characterized in that, include: The reaction unit is cylindrical and is used to prepare polyaluminum chloride stock solution. The screening unit is a square box that is connected to the reaction unit via a pipeline. The screening unit is used to screen solid waste in the polyaluminum chloride raw solution. The atomizing drying unit is a cylindrical tank with a conical bottom, which is connected to the screening unit through a pipeline. The atomizing drying unit is used to atomize and dry the polyaluminum chloride stock solution. A heating unit is connected to the reaction unit via a pipeline. The bottom surface of the heating unit is connected to the top surface of the atomizing drying unit. The heating unit is used to assist in heating air using the high-temperature exhaust gas from the reaction unit. The spray adsorption unit is a square box that is connected to the heating unit via a pipeline. The spray adsorption unit is used to treat the acidic waste gas generated by the reaction.

2. The polyaluminum chloride production apparatus according to claim 1, characterized in that, The polyaluminum chloride production apparatus includes: The reaction chamber is a tank-like structure. The spiral guide channel is a groove formed on the inner wall of the reaction chamber, and the spiral guide channel extends from the top of the inner wall of the reaction chamber to the bottom of the inner wall of the reaction chamber in a spiral shape; The first feed inlet is located on the top surface of the reaction chamber and is used to add the reaction raw materials; The first exhaust port is located on the top surface of the reaction chamber and is used to discharge the waste gas generated during the reaction. The first drive motor is located on the top surface of the reaction chamber; A first rotating shaft is disposed inside the reaction chamber, with one end passing through the top surface of the reaction chamber and connected to the output end of the first drive motor. Multiple stirring columns are evenly arranged on the shaft of the first rotating shaft, and the stirring columns are used to stir and mix the reaction raw materials. The first discharge port is located at the bottom of the reaction chamber and is used to discharge the polyaluminum chloride stock solution generated after the reaction.

3. The polyaluminum chloride production apparatus according to claim 2, characterized in that, The filtering unit includes: The screening chamber is a square box. The second inlet is located on the top surface of the screening chamber, and the second inlet is connected to the first outlet via a pipeline; Two vibration motors are installed on the outer wall of the screening chamber. The first sieve plate is set below the second feed inlet. One end of the first sieve plate passes through the inner wall of the screening chamber and is connected to the output end of the vibration motor. The first sieve plate is used for the initial screening of polyaluminum chloride stock solution. The second sieve plate is disposed below the first sieve plate. One end of the second sieve plate passes through the inner wall of the screening chamber and is connected to the output end of another vibration motor. The second sieve plate is used to perform secondary screening of the polyaluminum chloride stock solution. A first baffle is located below the second sieve plate. The first baffle is arranged in a direction perpendicular to the sieve plate. The two sides of the first baffle are respectively connected to the two inner sides of the screening chamber. The bottom surface of the first baffle is connected to the bottom surface of the screening chamber. The second discharge port is located on the bottom surface of the screening bin; Two second baffles are provided below the second sieve plate. One end of each second baffle is inclined and rests against the side opposite to the screening chamber and the first baffle, and the other end is connected to the second discharge port. The second baffles are used to guide the screened polyaluminum chloride solution into the second discharge port. The filter residue bin is a square box with an opening at the top, located on the bottom surface of the screening chamber. One side wall of the filter residue bin contacts the other side of the first baffle, and the corresponding other side wall is embedded in the side wall of the screening chamber. The filter residue bin is used to collect solid filter residue that falls from the first screen plate and the second screen plate.

4. The polyaluminum chloride production apparatus according to claim 3, characterized in that, The ends of the first and second sieve plates closest to the vibration motor are flexibly connected to the inner wall of the screening chamber via a flexible sealing gasket. The flexible sealing gasket is used to prevent the original liquid from overflowing from the screening chamber and to ensure that the first and second sieve plates vibrate normally.

5. The polyaluminum chloride production apparatus according to claim 4, characterized in that, The top surface of the first sieve plate is provided with a plurality of first grooves evenly distributed along a direction parallel to the side wall of the screening chamber. The first grooves are trapezoidal and the bottom surface of the first grooves is provided with a plurality of first sieve holes evenly distributed. The top surface of the second sieve plate is provided with a plurality of second grooves evenly distributed along a direction parallel to the side wall of the screening chamber. The second grooves are trapezoidal and the bottom surface of the second grooves is provided with a plurality of second sieve holes evenly distributed.

6. The polyaluminum chloride production apparatus according to claim 5, characterized in that, The atomizing drying unit includes: The drying chamber is a container that is cylindrical on top and conical on the bottom; The third inlet is located on the top surface of the drying chamber, and the third inlet is connected to the second outlet via a pipeline. The third discharge port is located on the bottom surface of the drying chamber and is used to discharge the dried polyaluminum chloride. The second drive motor is positioned at the center of the top surface of the drying chamber. The atomizer is circular and is located on the inner side of the top of the drying chamber. The atomizer is connected to the third feed port. Multiple nozzles are evenly arranged on the bottom surface of the atomizer. The nozzles are used to spray out the atomized polyaluminum chloride stock solution. The second rotating shaft is a cylindrical shaft, which is located inside the drying chamber. One end of the second rotating shaft passes through the center of the atomizer and is connected to the output end of the second drive motor. The air inlet is located on the top surface of the drying chamber; The hot air distributor is circular and is fitted on the outer wall of the atomizer. The top surface of the hot air distributor is connected to the inner side of the top of the drying chamber, and the hot air distributor is connected to the air inlet. The bottom surface of the hot air distributor is evenly provided with multiple inclined air outlets, which are used to blow hot air out at an angle to form a spiral air duct. The scraper contacts the inner wall of the drying chamber, and the scraper is connected to the rotating shaft via a connecting rod; An exhaust fan is installed through the lower side wall of the drying chamber, and the exhaust fan is used to extract air from the drying chamber; a filter screen is provided at one end of the exhaust fan embedded in the drying chamber, and the filter screen is used to prevent the dried polyaluminum chloride from being sucked out.

7. The polyaluminum chloride production apparatus according to claim 6, characterized in that, The bottom surface of the second rotating shaft is provided with a screw rod, the bottom of which extends into the third discharge port. The screw rod is used to crush and transport the dried polyaluminum chloride.

8. The polyaluminum chloride production apparatus according to claim 7, characterized in that, The heating unit includes: The waste heat recovery device is cylindrical and is used for preliminary heating of air. The heating device has one end connected to the waste heat recovery device and the other end connected to the air inlet. The heating device is used to reheat the hot air.

9. The polyaluminum chloride production apparatus according to claim 8, characterized in that, The waste heat recovery device includes: The heat insulation cylinder is a cylindrical shape that runs from top to bottom; The second exhaust port is located on the bottom side wall of the heat insulation cylinder; An exhaust gas pipeline is embedded on the inner side of the heat insulation cylinder. One end of the exhaust gas pipeline is connected to the first exhaust port, and the other end is connected to the second exhaust port. The exhaust gas pipeline is used to transport the high-temperature exhaust gas generated by the reaction.

10. The polyaluminum chloride production apparatus according to claim 9, characterized in that, The spray adsorption unit includes: The spray adsorption chamber is a square box. An air inlet is located on an outer side wall of the spray adsorption chamber, and the air inlet is connected to the second exhaust port. The liquid inlet is located on one side of the top surface of the spray adsorption chamber; The first partition has a downward-sloping through hole at the top. The first partition is located in the center of the spray adsorption chamber. The top and bottom surfaces of the partition are connected to the top and bottom surfaces of the spray adsorption chamber, respectively. The partition is used to divide the spray adsorption chamber into two parts. A spraying device is installed on one side of the first partition. The top surface of the spraying device is connected to the top surface of the spraying adsorption chamber, and the spraying device is connected to the liquid inlet. Multiple spray heads are evenly arranged on the bottom surface of the spraying device, and the spray heads are used to atomize and spray the spraying liquid. A drain outlet is located below the spraying device and is opened on the bottom surface of the spraying adsorption chamber. The drain outlet is used to discharge the liquid after spraying is completed. Two third baffles are provided below the spray device. One end of each third baffle is respectively placed against the inner side of the spray adsorption chamber and the side of the first partition, and the other end is connected to the drain port. The third baffles are used to guide the liquid into the drain port. The second and third partitions are arranged in parallel on the other side of the first partition. The top surface of the first partition is connected to the top surface of the spray adsorption chamber, and the bottom surface of the third partition is connected to the bottom surface of the spray adsorption chamber. Activated carbon is filled between the first, second and third partitions. The third exhaust port is located on the outer side of the spray adsorption chamber, which is parallel to and close to the third partition. The third exhaust port is used to discharge the waste gas after it has been adsorbed by activated carbon.

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