Evaporative crystallization zero-emission equipment for high-salinity wastewater

Abstract

The invention relates to the technical field of high-salinity wastewater treatment, and discloses high-salinity wastewater evaporative crystallization zero-discharge equipment which comprises a water tank, a tank body and an outer pipe, the upper end of the tank body is fixedly connected with a shell through a round opening, the upper end of the tank body is fixedly connected with a Roots blower, the air outlet end of the Roots blower is fixedly connected with an air pipe, and the air pipe is fixedly connected with an air inlet. The air pipe is fixedly connected with the upper end of the shell, a preheating mechanism is arranged on the side wall of the shell, the preheating mechanism distributes water through a knitted fabric pipe, water in wastewater is evaporated through micro-pressure hot air, and the concentration of the wastewater is improved; the lower end of the tank body is fixedly connected with a flow guide pipe, and one end of the flow guide pipe is fixedly connected with the pipe wall of the outer pipe; an inner pipe is fixedly connected into the outer pipe. The high-salinity wastewater evaporative crystallization zero-emission equipment can effectively utilize a heat source to perform evaporative crystallization on high-salinity wastewater, and crystallized organic salt cannot scale in the equipment to influence heat transfer, so that the high-salinity wastewater treatment efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of high-salt wastewater treatment, and in particular to a high-salt wastewater evaporation crystallization zero-discharge equipment. Background Art

[0002] Wastewater discharged during industrial production often contains high concentrations of inorganic salts, especially inorganic salt by-products in chemical production or a large amount of inorganic salts produced by adjusting the pH of the solution, which will make the inorganic salt concentration in the final discharged wastewater high. High-salt wastewater has the characteristics of large discharge volume, strong toxicity and high difficulty in treatment. For high-salt organic wastewater, although it has undergone pretreatment and biochemical treatment, it still contains a certain amount of organic matter. The high-salt wastewater is evaporated and crystallized using a concentrated brine evaporation liquid zero emission device or an evaporation and crystallization equipment for treating high-salt wastewater. Physical, chemical and biochemical processes such as evaporation, crystallization or drying can concentrate the inorganic salts in the wastewater to a very high concentration, and most of the water has been returned for recycling. For example, the treatment methods commonly used in industrial production in the past include multi-effect evaporation followed by flaking with a flaking machine or spray granulation followed by fluidized bed drying, etc. However, these methods often require a large amount of steam, coal and other energy to evaporate and crystallize the high-salt wastewater.

[0003] At present, although traditional evaporation and crystallization equipment can evaporate the water in high-salt wastewater to crystallize inorganic salts, the inorganic salts often stick to the equipment to form scale after crystallization. The scale is difficult to clean and will hinder heat transfer, reduce the efficiency of evaporating water, and reduce the utilization rate of heat source. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the present invention provides a high-salt wastewater evaporation crystallization zero-emission equipment, which solves the problem that inorganic salts often adhere to the equipment to form scale after crystallization, and the scale is difficult to clean and will also hinder heat transfer, reduce the efficiency of evaporating water, and reduce the utilization rate of heat sources.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-salt wastewater evaporation crystallization zero-emission equipment, comprising a water tank, a tank body and an outer tube, the upper end of the tank body is fixedly connected to a shell through a round mouth, the upper end of the tank body is fixedly connected to a Roots blower, the air outlet end of the Roots blower is fixedly connected to an air duct, the air duct is fixedly connected to the upper end of the shell, the side wall of the shell is provided with a preheating mechanism, the preheating mechanism distributes water through a knitted cloth tube, and uses micro-pressure hot air to evaporate the water in the wastewater to increase the concentration of the wastewater;

[0008] The lower end of the tank body is fixedly connected with a guide tube, one end of which is fixedly connected to the wall of the outer tube, an inner tube is fixedly connected inside the outer tube, the wall of the inner tube is fixedly connected to one end of the guide tube, an evaporation mechanism is installed in the inner tube, and the high-temperature component of the evaporation mechanism further evaporates the water in the wastewater until the components in the wastewater are crystallized;

[0009] The side wall of the tank body is fixedly connected with an exhaust pipe and a water inlet pipe, a heat exchange mechanism is installed at the pipe mouth of the water inlet pipe, the heat exchange mechanism is connected with a connecting part through a conduit, and the heat exchange mechanism uses the hot steam discharged by the preheating mechanism to preheat the wastewater to increase the temperature of the wastewater entering the preheating mechanism;

[0010] An air duct is fixedly connected to the wall of the fresh air duct, one end of the air duct is fixedly connected to the wall of the outer tube, and one end of the inner tube extends to the outside of the outer tube and is fixedly connected to a tail air duct and a sewage pipe.

[0011] Preferably, the preheating mechanism comprises a circular ring, the upper end of the connecting portion is fixedly connected to the circular ring, the upper end of the knitted fabric tube is fixedly connected to the connecting portion, a sliding sleeve is fixedly connected to the inner side of the circular ring, the sliding sleeve is sleeved on the side wall of the shell, a plurality of tension springs are fixedly connected to the upper end of the circular ring, the upper ends of the plurality of tension springs are fixed to the upper inner wall of the tank body, a first fixing ring and a second fixing ring are fixedly connected to the inner and outer sides of the lower end of the knitted fabric tube, the upper ends of the first fixing ring and the second fixing ring are both provided with folded edges, the side walls of the first circular ring and the second circular ring are commonly fixedly connected to an annular plate, the annular plate is fixed in the tank body and is provided with a plurality of water seepage holes, the water seepage holes are located between the first fixing ring and the second fixing ring;

[0012] Two electric heaters are fixedly connected in the shell, and the electric heater is located below the pipe opening of the fresh air duct. One end of the fresh air duct extends into the shell and is fixedly connected to an air distribution box. A plurality of air nozzles are fixedly connected to the side wall of the air distribution box, and an end cap is fixedly connected in the second fixing ring.

[0013] Preferably, the side wall of the end cap is fixedly connected to a spiral tube, the tube wall of the spiral tube is sleeved with a sleeve, the upper end of the sleeve is fixedly connected to a bell tube, the bell tube is fixed in the tank body, one end of the spiral tube extends into the end cap, and the other end of the spiral tube passes through the lower end of the tank body and is fixedly connected to the tube wall of the outer tube.

[0014] Preferably, the lower end of the air distribution box is rotatably connected to a vertical shaft through a rolling bearing, and the vertical shaft is rotatably connected to the support frame of the electric heater through a shaft sleeve, and the lower end of the shell is provided with a plurality of notches, and a transmission frame is commonly sleeved in the plurality of notches, and the transmission frame passes through the notches and is fixedly connected to the inner side of the sliding sleeve, and a box body is provided at the upper end of the transmission frame, and the box body is fixed on the side wall of the electric heater support below, and the side wall of the vertical shaft is fixedly connected with a fan blade, and the lower end of the vertical shaft extends into the box body and is fixedly connected to a first bevel gear, a second bevel gear is meshed on one side of the first bevel gear, and a transverse shaft is fixedly connected to the side wall of the second bevel gear, and the two ends of the transverse shaft are rotatably connected to the box body through ball bearings, and two eccentric wheels are fixedly connected to the shaft wall of the transverse shaft, and the lower end of the box body is sleeved with two rectangular rods through square holes, and the lower ends of the two rectangular rods are fixedly connected to the upper end of the transmission frame, and the upper ends of the rectangular rods contact the side walls of the eccentric wheels.

[0015] Preferably, the heat exchange mechanism includes two annular tubes, a plurality of heat exchange coils are fixedly connected between the two annular tubes, and the plurality of heat exchange coils are all sleeved on the side wall of the knitted cloth tube, the tube wall of one of the annular tubes is fixedly connected with a conduit, one end of the conduit is fixedly connected to the connecting part, the tube wall of the other annular tube is fixedly connected with a connecting pipe, one end of the connecting pipe extends to the outside of the tank body, a magnetic pump is fixedly connected to one side of the water tank, the water inlet end of the magnetic pump is fixedly connected to the water outlet of the water tank, and the water outlet end of the magnetic pump is fixedly connected to one end of the connecting pipe.

[0016] Preferably, one end of the tail air duct is fixedly connected to one side of the water tank through a bent pipe, the upper end of the water tank is fixedly connected to one end of the exhaust duct through a pipe, the bottom of the water tank is provided with an inner recess, and an exhaust port is opened on the inner recess, two partitions are fixedly connected in the water tank, a plurality of heat exchange straight pipes are fixedly connected between the two partitions, a raw water pipe is fixedly connected to the side wall of the water tank, and one end of the raw water pipe is located between the two partitions.

[0017] Preferably, the evaporation mechanism includes an iron core, a plurality of ring sheets are fixedly connected to the side walls of the iron core, a rectangular frame is arranged in the inner tube, opposite sides of the rectangular frame are in contact with the inner side of the inner tube, a plurality of spiral strips are fixedly connected to the side walls of the rectangular frame, and the spiral strips are in contact with the inner wall of the inner tube, a plurality of U-shaped sheets are fixedly connected to the inner walls of the opposite sides of the rectangular frame, and the plurality of U-shaped sheets are respectively clamped on the side walls of the ring sheets, wherein a scraper is fixedly connected between two adjacent U-shaped sheets, and one side of the scraper is in contact with the side wall of the iron core, one end of the inner tube is fixedly connected to a motor, one end of the motor is fixedly connected to a main shaft, one end of the main shaft is coaxially fixedly connected to one end of the iron core, the other end of the iron core is fixedly connected to a central shaft, the central shaft is rotatably connected to the inner tube through a bearing seat, and a plurality of high-frequency induction coils are sleeved on the side walls of the inner tube.

[0018] Preferably, a gear is fixedly connected to the shaft wall of the main shaft, a gear shaft is meshed with one side of the gear, the gear shaft is rotatably connected to one end of the inner tube through a rolling bearing, the gear shaft is meshed with an inner gear ring, a sleeve is fixedly connected at the center of the inner gear ring, a sealing plate is fixedly connected in the inner tube, the sealing plate is rotatably connected to the side wall of the sleeve through a needle bearing, the inner side of the sleeve is rotatably connected to the shaft wall of the main shaft through a roller bearing, and one end of the rectangular frame is coaxially fixedly connected to one end of the sleeve through a circular hole at the center.

[0019] Preferably, an annular block is fixedly connected in the interlayer of the inner tube and the outer tube, the inner tube is an iron tube, and a plurality of evenly distributed air inlet holes are opened on its tube wall, the rectangular frame, annular sheet, U-shaped sheet and scraper are all made of iron, and the surface is coated with high temperature resistant material, and the outer tube is an insulating tube.

[0020] Preferably, one end of the central shaft is rotatably connected to one end of the inner tube via a needle bearing, and two scrapers are fixedly connected to the shaft wall of the central shaft via a support frame, and both of the scrapers are in contact with the inner wall of the inner tube.

[0021] (III) Beneficial effects

[0022] Compared with the prior art, the present invention provides a high-salt wastewater evaporation crystallization zero-discharge equipment, which has the following beneficial effects:

[0023] 1. When the present invention is in use, high-salt wastewater is fed from the raw water pipe on one side of the water tank, and the wastewater enters the gap between the two partitions. Then, the magnetic pump works to feed the high-salt wastewater into the connecting part through the connecting pipe. At this time, the connecting part and the ring form a water distribution chamber with an annular structure. The high-salt wastewater in the water distribution chamber is immersed in the knitted cloth tube and slowly falls into the preheating mechanism. The preheating mechanism uses micro-pressure hot air to evaporate the water in the high-salt wastewater. After the water is evaporated, the concentration and temperature of the high-salt wastewater are increased, and then after concentration The high-salt wastewater enters the inner tube through the guide pipe, and the evaporation mechanism in the inner tube further heats and evaporates the wastewater until the components in the wastewater crystallize. In this process, the discharged high-temperature water vapor enters the top of the partition in the water tank through the tail wind pipe, and mixes with the water vapor evaporated by the preheating mechanism in the exhaust pipe. Then the high-temperature water vapor enters the lower part of the water tank through the heat exchange straight pipe and is discharged from the exhaust port. In this way, the raw water of the high-salt wastewater can be preheated by the water vapor discharged from the preheating mechanism and the evaporation mechanism, so that the high-salt wastewater can evaporate and crystallize quickly.

[0024] 2. The preheating mechanism provided in the present invention, when in use, the two electric heaters generate heat when working to raise the temperature in the knitted fabric tube, and the Roots blower delivers pressurized gas to the knitted fabric tube through the fresh air duct when working. At this time, the gas is heated when passing through the heated electric heater to further form hot air. The hot air passes through the knitted fabric tube under pressure and evenly contacts the high-salt wastewater immersed in it, so that the temperature of the high-salt wastewater is further increased. At this time, the moisture in the wastewater evaporates rapidly under the action of the hot air flow, thereby further concentrating the high-salt wastewater. When the fresh air duct is exhausted, the gas distribution box is used to evenly distribute the gas from multiple The air is discharged from the exhaust nozzle, and the discharged air flow drives the fan blades to rotate. When the fan blades rotate, the vertical shaft is driven to rotate the first bevel gear. When the first bevel gear rotates, the second bevel gear is driven to rotate the horizontal shaft. The rotation of the horizontal shaft drives the eccentric wheel to rotate and squeeze the rectangular rod. The rectangular rod is subjected to force to drive the transmission frame to move the sliding sleeve up and down, and under the action of the tension spring, the sliding sleeve makes a reciprocating motion to drive the knitted cloth tube to vibrate. At this time, the vibrating knitted cloth tube can accelerate the downward movement of high-salt wastewater, so that the continuously flowing high-salt wastewater can be evenly contacted with the high-temperature airflow passing through the knitted cloth tube, thereby accelerating the evaporation of water and realizing the waste heat and concentration of high-salt wastewater.

[0025] 3. The evaporation mechanism provided in the present invention generates a high-frequency magnetic field when the high-frequency induction coil is in use. The inner tube and the iron core in the magnetic field generate high temperature by using their metal materials. The concentrated high-salt wastewater entering the inner tube through the conduit is quickly heated when it contacts the high-temperature inner tube and the core, causing the water inside to evaporate. At this time, the fresh air in the induced draft duct flows into the inner tube through the air inlet hole on the inner tube, and is then discharged through the tail air duct. In this way, the evaporated water vapor can be quickly discharged from the inner tube. When working, the motor is started to drive the main shaft to rotate. When the main shaft rotates, it drives the gear to rotate the gear shaft. When the gear shaft rotates, it drives the inner gear ring to rotate the sleeve. The rotation of the sleeve drives the rectangular frame to rotate. When the rectangular frame rotates, it drives the spiral strips to stir the high-salt wastewater in the inner tube at a low speed, so that the high-salt wastewater slides over the inner side of the inner tube, so that the high-temperature inner tube heats and evaporates the high-salt wastewater. At the same time, the rectangular The U-shaped piece in the frame slides over the ring piece to prevent salt crystals from sticking to the ring piece. At the same time, the scraper contacts the iron core to scrape off the crystals stuck on its surface, so that the inner tube, the iron core and the ring piece can all heat the wastewater, and the crystals will not stick to the evaporation mechanism. The side of the rectangular frame has a certain thickness. When it rotates, it can drive the wastewater at the bottom of the inner tube to a high place and then slide down on the surface of the iron core and the ring piece. In this way, the wastewater can be in contact with multiple heating elements in the inner tube to accelerate the evaporation of water. At the same time, when the main shaft rotates, it can drive the core and the ring piece to rotate quickly, so that the crystals formed after the high-salt wastewater evaporates are not easy to stick and can better dissipate heat. At the same time, when the rectangular frame rotates, the rectangular frame drives the central axis and the support frame to make the scraper do a circular motion. When the scraper does a circular motion, it can gradually stir the crystals, so that it is in uniform contact with the high-temperature inner tube to further evaporate water. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of a zero-emission equipment for evaporation and crystallization of high-salt wastewater proposed by the present invention;

[0027] Figure 2 A cross-sectional view of a tank, a water tank, an outer tube and an inner tube in a high-salinity wastewater evaporation crystallization zero-discharge device proposed by the present invention;

[0028] Figure 3 This is a schematic diagram of the structure of a preheating mechanism in a tank in a zero-emission device for evaporation and crystallization of high-salt wastewater proposed by the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the heat exhaust pipe and the annular pipe of the heat exchange mechanism in the high-salt wastewater evaporation crystallization zero-discharge equipment proposed by the present invention;

[0030] Figure 5 This is a schematic diagram of the structure of a waste heat mechanism in a zero-discharge device for evaporation and crystallization of high-salt wastewater proposed by the present invention;

[0031] Figure 6This is a schematic diagram of the structure of a spiral tube, annular plate, trumpet tube and sleeve in a high-salinity wastewater evaporation crystallization zero-discharge device proposed by the present invention;

[0032] Figure 7 This is a schematic diagram of the internal structure of a water tank in a high-salt wastewater evaporation and crystallization zero-discharge device proposed by the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of the evaporation mechanism in a high-salt wastewater evaporation crystallization zero-discharge device proposed by the present invention;

[0034] Fig. 9 This is a schematic diagram of the structure of a rectangular frame, spiral bars, iron core and ring sheets in a high-salinity wastewater evaporation crystallization zero-discharge device proposed by the present invention;

[0035] Fig.10 A partial cross-sectional view of an inner tube in a zero-discharge device for evaporation and crystallization of high-salt wastewater proposed by the present invention;

[0036] Fig.11 This is a schematic diagram of the structure of a ring sheet, a U-shaped sheet and a scraper sheet in a high-salinity wastewater evaporation crystallization zero-discharge device proposed by the present invention;

[0037] Fig.12 This is a schematic structural diagram of an internal gear ring, a gear shaft and gears in a high-salt wastewater evaporation and crystallization zero-emission device proposed by the present invention.

[0038] In the figure: 1, outer tube; 2, water tank; 3, tank body; 4, shell; 5, Roots blower; 6, induced draft duct; 7, guide tube; 8, inner tube; 9, motor; 10, magnetic pump; 11, spiral tube; 12, heat exchange coil; 13, tension spring; 14, ring; 15, ring plate; 16, trumpet tube; 17, rectangular frame; 18, scraper; 19, heat exchange straight tube; 20, partition; 21, knitted cloth tube; 22, air distribution box; 23, fan blade; 24, connection part; 25, electric heater; 26, Transmission frame; 27, annular tube; 28, air nozzle; 29, sliding sleeve; 30, vertical shaft; 31, second bevel gear; 32, eccentric wheel; 33, rectangular rod; 34, box body; 35, first bevel gear; 36, end cap; 37, folded edge; 38, sleeve; 39, seepage hole; 40, annular block; 41, high-frequency induction coil; 42, spiral strip; 43, inner gear ring; 44, sealing plate; 45, sleeve; 46, gear; 47, iron core; 48, ring plate; 49, scraper; 50, gear shaft. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Example 1: Refer to the attached Figure 1-12 A high-salt wastewater evaporation crystallization zero-emission equipment, comprising a water tank 2, a tank body 3 and an outer tube 1, the upper end of the tank body 3 is fixedly connected to a shell 4 through a round mouth, the upper end of the tank body 3 is fixedly connected to a Roots blower 5, the air outlet end of the Roots blower 5 is fixedly connected to an air duct, the air duct is fixedly connected to the upper end of the shell 4, the side wall of the shell 4 is provided with a preheating mechanism, the preheating mechanism distributes water through a knitted cloth tube 21, and uses micro-pressure hot air to evaporate the water in the wastewater to increase the concentration of the wastewater;

[0041] The lower end of the tank body 3 is fixedly connected with a guide tube 7, one end of which is fixedly connected to the wall of the outer tube 1, an inner tube 8 is fixedly connected inside the outer tube 1, the wall of the inner tube 8 is fixedly connected to one end of the guide tube 7, an evaporation mechanism is installed in the inner tube 8, and the high-temperature component of the evaporation mechanism further evaporates the water in the wastewater until the components in the wastewater are crystallized;

[0042] An induced draft duct 6 is fixedly connected to the wall of the fresh air duct, one end of which is fixedly connected to the wall of the outer tube 1, one end of the inner tube 8 extends to the outside of the outer tube 1 and is fixedly connected to a tail air duct and a sewage pipe, an exhaust duct and a water inlet pipe are fixedly connected to the side wall of the tank body 3, a heat exchange mechanism is installed at the mouth of the water inlet pipe, the heat exchange mechanism is connected to a connecting portion 24 through a conduit, the heat exchange mechanism utilizes the hot steam discharged from the preheating mechanism to preheat the wastewater, thereby increasing the temperature of the wastewater entering the preheating mechanism, the heat exchange mechanism includes two annular tubes 27, a plurality of heat exchange coils 12 are fixedly connected between the two annular tubes 27, the plurality of heat exchange coils 12 are all sleeved on the side wall of the knitted cloth tube 21, a conduit is fixedly connected to the wall of one of the annular tubes 27, one end of the conduit is fixedly connected to the connecting portion 24, and the other end of the conduit is fixedly connected to the connecting portion 24. A connecting pipe is fixedly connected to the pipe wall of an annular pipe 27, one end of which extends to the outside of the tank body 3, a magnetic pump 10 is fixedly connected to one side of the water tank 2, and the magnetic pump 10 adopts a water pump specially used for pumping corrosive media. The water inlet end of the magnetic pump 10 is fixedly connected to the water outlet of the water tank 2, and the water outlet end of the magnetic pump 10 is fixedly connected to one end of the connecting pipe, one end of the tail air pipe is fixedly connected to one side of the water tank 2 through a bend pipe, and the upper end of the water tank 2 is fixedly connected to one end of the exhaust pipe through a pipe. An inner concave portion is provided at the bottom of the water tank 2, and an exhaust port is provided on the inner concave portion. Two partitions 20 are fixedly connected in the water tank 2, and a plurality of heat exchange straight pipes 19 are fixedly connected between the two partitions 20. A raw water pipe is fixedly connected to the side wall of the water tank 2, and one end of the raw water pipe is located between the two partitions 20.

[0043] When the present invention is in use, high-salt wastewater is fed from the raw water pipe on one side of the water tank 2, and the wastewater enters the gap between the two partitions 20. Then, the magnetic pump 10 works to feed the high-salt wastewater into the connecting part 24 through the connecting pipe. At this time, the connecting part 24 and the ring 14 form a water distribution chamber with an annular structure. The high-salt wastewater in the water distribution chamber is immersed in the knitted cloth tube 21 and slowly falls into the preheating mechanism. The preheating mechanism uses micro-pressure hot air to evaporate the water in the high-salt wastewater. After the water is evaporated, the concentration and temperature of the high-salt wastewater are increased. Then The concentrated high-salinity wastewater enters the inner tube 8 through the guide tube 7, and the evaporation mechanism in the inner tube 8 further heats and evaporates the wastewater until the components in the wastewater crystallize. In this process, the induced draft pipe 6 can deliver the pressurized air delivered by the Roots blower 5 to the evaporation mechanism, which is conducive to accelerating the gas flow to discharge water vapor. The discharged high-temperature water vapor enters the upper part of the partition 20 in the water tank 2 through the tail air pipe, and mixes with the water vapor evaporated by the preheating mechanism in the exhaust pipe. Then, the high-temperature water vapor enters the lower part of the water tank 2 through the heat exchange straight pipe 19 and is discharged from the exhaust port.

[0044] When the high-temperature water vapor passes through the heat exchange straight tube 19, the high-temperature water vapor exchanges heat with the raw water of the high-salt wastewater, and can preheat the high-salt wastewater. The preheated high-salt wastewater is pumped into the connecting pipe through the magnetic pump 10, and the warm wastewater in the connecting pipe flows into the multiple heat exchange coils 12 through the lower annular pipe 27. The heat exchange coils 12 can absorb the high-temperature water vapor in the tank body 3 and transfer it to the high-salt wastewater inside it. Under the pumping of the magnetic pump 10, the high-salt wastewater enters the upper annular pipe 27 from bottom to top, and enters the water distribution chamber through the conduit. In this way, the raw water of the high-salt wastewater can be preheated by using the water vapor discharged from the preheating mechanism and the evaporation mechanism, so that the high-salt wastewater can evaporate and crystallize quickly.

[0045] Embodiment 2: Based on embodiment 1, the difference is that;

[0046] Refer to the attached Figure 2-6 The preheating mechanism includes a circular ring 14, the upper end of the connecting portion 24 is fixedly connected to the circular ring 14, the upper end of the knitted fabric tube 21 is fixedly connected to the connecting portion 24, the inner side of the circular ring 14 is fixedly connected with a sliding sleeve 29, the sliding sleeve 29 is sleeved on the side wall of the shell 4, the upper end of the circular ring 14 is fixedly connected with a plurality of tension springs 13, the upper ends of the plurality of tension springs 13 are all fixed to the upper inner wall of the tank body 3, the inner and outer sides of the lower end of the knitted fabric tube 21 are respectively fixedly connected with a first fixing ring and a second fixing ring, and the upper ends of the first fixing ring and the second fixing ring are both provided with There is a folded edge 37, and the side walls of the first circular ring 14 and the second circular ring 14 are fixedly connected with an annular plate 15. The annular plate 15 is fixed in the tank body 3 and has multiple water seepage holes 39. The water seepage holes 39 are located between the first fixed ring and the second fixed ring. Two electric heaters 25 are fixedly connected in the shell 4. The electric heater 25 is located below the pipe mouth of the fresh air duct. One end of the fresh air duct extends into the shell 4 and is fixedly connected with an air distribution box 22. The side wall of the air distribution box 22 is fixedly connected with multiple air nozzles 28. An end cap 36 is fixedly connected in the second fixed ring.

[0047] The side wall of the end cap 36 is fixedly connected with the spiral tube 11, the tube wall of the spiral tube 11 is sleeved with a sleeve 38, the upper end of the sleeve 38 is fixedly connected with the trumpet tube 16, the trumpet tube 16 is fixed in the tank body 3, one end of the spiral tube 11 extends into the end cap 36, the other end of the spiral tube 11 passes through the lower end of the tank body 3 and is fixedly connected to the tube wall of the outer tube 1, the lower end of the gas distribution box 22 is rotatably connected with the vertical shaft 30 through a rolling bearing, and the vertical shaft 30 is rotatably connected to the support frame of the electric heater 25 through a shaft sleeve, a plurality of cutouts are opened at the lower end of the shell 4, and a transmission frame 26 is sleeved in the plurality of cutouts, the transmission frame 26 passes through the cutout and is fixedly connected to the inner side of the sliding sleeve 29, and the upper end of the transmission frame 26 A box body 34 is provided, and the box body 34 is fixed on the side wall of the electric heater 25 bracket below. The side wall of the vertical shaft 30 is fixedly connected with the fan blade 23. The lower end of the vertical shaft 30 extends into the box body 34 and is fixedly connected with the first bevel gear 35. The second bevel gear 31 is meshed with one side of the first bevel gear 35. The side wall of the second bevel gear 31 is fixedly connected with a horizontal axis. The two ends of the horizontal axis are rotatably connected in the box body 34 through ball bearings. Two eccentric wheels 32 are fixedly connected to the shaft wall of the horizontal axis. Two rectangular rods 33 are sleeved on the lower end of the box body 34 through square holes. The lower ends of the two rectangular rods 33 are fixedly connected to the upper end of the transmission frame 26, and the upper ends of the rectangular rods 33 are in contact with the side walls of the eccentric wheels 32.

[0048] The preheating mechanism provided in the present invention, when in use, generates heat when the two electric heaters 25 are working to raise the temperature in the knitted fabric tube 21, and the Roots blower 5 is working to deliver pressurized gas to the knitted fabric tube 21 through the fresh air duct, and the gas is heated to further form hot air when passing through the heated electric heater 25, and the hot air passes through the knitted fabric tube 21 under pressure and evenly contacts the high-salt wastewater immersed therein, so that the temperature of the high-salt wastewater is further increased, and the water in the wastewater is rapidly volatilized under the action of the hot air flow, thereby further concentrating the high-salt wastewater;

[0049] When the fresh air duct is exhausted, the gas distribution box 22 is used to evenly discharge the gas from multiple exhaust nozzles 28. At this time, the exhausted airflow blows the fan blades 23 to rotate. When the fan blades 23 rotate, it drives the vertical shaft 30 to rotate the first bevel gear 35. When the first bevel gear 35 rotates, it drives the second bevel gear 31 to rotate the horizontal axis. The rotation of the horizontal axis drives the eccentric wheel 32 to rotate and squeeze the rectangular rod 33. The rectangular rod 33 is forced to drive the transmission frame 26 to move the sliding sleeve 29 up and down, and under the action of the tension spring 13, the sliding sleeve 29 makes a reciprocating motion to drive the knitted cloth tube 21 to shake. At this time, the shaking knitted cloth tube 21 can accelerate the downward movement of high-salt wastewater, so that the continuously flowing high-salt wastewater can be evenly contacted with the high-temperature airflow passing through the knitted cloth tube 21, accelerate the evaporation of water, and realize the waste heat and concentration of high-salt wastewater.

[0050] Embodiment 3: Based on embodiment 1, the difference is that;

[0051] Refer to the attached Figure 7-12 The evaporation mechanism includes an iron core 47, and a plurality of ring sheets 48 are fixedly connected to the side wall of the iron core 47. A rectangular frame 17 is arranged in the inner tube 8, and the opposite sides of the rectangular frame 17 are in contact with the inner side of the inner tube 8. The side wall of the rectangular frame 17 is fixedly connected with a plurality of spiral strips 42, and the spiral strips 42 are in contact with the inner wall of the inner tube 8. The inner walls of the opposite sides of the rectangular frame 17 are fixedly connected with a plurality of U-shaped sheets, and the plurality of U-shaped sheets are respectively clamped on the side walls of the ring sheets 48, wherein a scraper 49 is fixedly connected between two adjacent U-shaped sheets, and one side of the scraper 49 is in contact with the side wall of the iron core 47, one end of the inner tube 8 is fixedly connected with a motor 9, one end of the motor 9 is fixedly connected with a main shaft, one end of the main shaft is coaxially fixedly connected with one end of the iron core 47, and the other end of the iron core 47 is fixedly connected with The middle shaft is rotatably connected to the inner tube 8 through a bearing seat, one end of the middle shaft is rotatably connected to one end of the inner tube 8 through a needle bearing, and two scrapers 18 are fixedly connected to the shaft wall of the middle shaft through a support frame. Both scrapers 18 are in contact with the inner wall of the inner tube 8, and a plurality of high-frequency induction coils 41 are sleeved on the side wall of the inner tube 8. A high-frequency power supply (20-50KHz) is used to power the high-frequency induction coil 41. The high-frequency induction coil 41 generates a high-frequency magnetic field to heat the inner tube 8 and the iron core 47 in the magnetic field, and the temperature measuring cable and the temperature sensor monitor the temperature of the inner tube in real time, and the output power of the high-frequency power supply is controlled by the control center to control the evaporation temperature. This technology has been widely used in life, and those skilled in the art are already aware of it, so it will not be described in detail.

[0052] A gear 46 is fixedly connected to the shaft wall of the main shaft, and a gear shaft 50 is meshed on one side of the gear 46. The gear shaft 50 is rotatably connected to one end of the inner tube 8 through a rolling bearing. The gear shaft 50 is meshed with an inner gear ring 43, and a sleeve 45 is fixedly connected at the center of the inner gear ring 43. A sealing plate 44 is fixedly connected in the inner tube 8, and the sealing plate 44 is rotatably connected to the side wall of the sleeve 45 through a needle bearing. The inner side of the sleeve 45 is rotatably connected to the shaft wall of the main shaft through a roller bearing. The center of one end of the rectangular frame 17 is coaxially fixedly connected to one end of the sleeve 45 through a circular hole. An annular block 40 is fixedly connected in the interlayer of the inner tube 8 and the outer tube 1. The inner tube 8 is an iron tube, and a plurality of evenly distributed air inlet holes are opened on its tube wall. The rectangular frame 17, the ring sheet 48, the U-shaped sheet and the scraper 49 are all made of iron, and the surfaces are coated with high-temperature resistant materials. The outer tube 1 is an insulating tube.

[0053] The evaporation mechanism provided in the present invention generates a high-frequency magnetic field when the high-frequency induction coil 41 is in use. The inner tube 8 and the iron core 47 in the magnetic field generate high temperature by using their metal materials. The concentrated high-salt wastewater entering the inner tube 8 through the conduit 7 is quickly heated when it contacts the high-temperature inner tube 8 and the core, so that the water inside it evaporates. At this time, the fresh air in the induced draft duct 6 flows into the inner tube 8 through the air inlet hole on the inner tube 8, and then is discharged through the tail air duct. In this way, the evaporated water vapor can be quickly discharged from the inner tube 8. When working, the motor 9 is started to drive the main shaft to rotate. When the main shaft rotates, it drives the gear 46 to rotate the gear shaft 50. When the gear shaft 50 rotates, it drives the inner gear ring 43 to rotate the sleeve 45. The sleeve 45 rotates and drives the rectangular frame 17 to rotate. When the rectangular frame 17 rotates, it drives the spiral strips 43 to stir the high-salt wastewater in the inner tube 8 at a low speed, so that the high-salt wastewater slides over the inner side of the inner tube 8, so that the high-temperature inner tube 8 heats and evaporates the high-salt wastewater. At the same time, the rectangular frame The U-shaped piece in 17 slides over the ring piece 48 to prevent salt crystals from sticking to the ring piece 48. At the same time, the scraper 49 contacts the iron core 47 to scrape off the crystals stuck on its surface, so that the inner tube 8, the iron core 47 and the ring piece 48 can all heat the wastewater, and the crystals will not stick to the evaporation mechanism. The side of the rectangular frame 17 has a certain thickness. When it rotates, it can drive the wastewater at the bottom of the inner tube 8 to a high place and then slide on the surface of the iron core 47 and the ring piece 48. In this way, the wastewater can be in contact with multiple heating elements in the inner tube 8 to accelerate the evaporation of water. At the same time, when the main shaft rotates, it can drive the close heart 47 and the ring piece 48 to rotate quickly, so that the crystals formed after the high-salt wastewater evaporates are not easy to stick and can better dissipate heat. At the same time, when the rectangular frame 17 rotates, the rectangular frame drives the central axis and the support frame to make the scraper 18 do a circular motion. When the scraper 18 does a circular motion, it can gradually stir the crystals, so that it is in uniform contact with the high-temperature inner tube 8 to further evaporate water.

[0054] It should be noted that the term "comprises" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article, or device. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the presence of other identical elements in the process, method, article, or device that includes the element.

[0055] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A zero-emission device for evaporation and crystallization of high-salinity wastewater, comprising a water tank (2), a tank body (3) and an outer tube (1), characterized in that: The upper end of the tank body (3) is fixedly connected to a shell (4) through a circular opening, the upper end of the tank body (3) is fixedly connected to a Roots blower (5), the air outlet end of the Roots blower (5) is fixedly connected to an air duct, the air duct is fixedly connected to the upper end of the shell (4), and the side wall of the shell (4) is provided with a preheating mechanism, the preheating mechanism distributes water through a knitted cloth tube (21), and uses micro-pressure hot air to evaporate the water in the wastewater to increase the concentration of the wastewater; The lower end of the tank body (3) is fixedly connected to a flow guide tube (7), one end of the flow guide tube (7) is fixedly connected to the tube wall of the outer tube (1), an inner tube (8) is fixedly connected inside the outer tube (1), the tube wall of the inner tube (8) is fixedly connected to one end of the flow guide tube (7), an evaporation mechanism is installed in the inner tube (8), and a high-temperature component of the evaporation mechanism further evaporates the water in the wastewater until the components in the wastewater are crystallized; The side wall of the tank body (3) is fixedly connected with an exhaust pipe and a water inlet pipe, a heat exchange mechanism is installed at the pipe mouth of the water inlet pipe, the heat exchange mechanism is connected to a connecting part (24) through a conduit, and the heat exchange mechanism uses the hot steam discharged by the preheating mechanism to preheat the wastewater, thereby increasing the temperature of the wastewater entering the preheating mechanism; An air duct (6) is fixedly connected to the wall of the fresh air duct, one end of the air duct (6) is fixedly connected to the wall of the outer tube (1), and one end of the inner tube (8) extends to the outside of the outer tube (1) and is fixedly connected to a tail air duct and a sewage discharge pipe.

2. The high-salinity wastewater evaporation and crystallization zero-discharge equipment according to claim 1 is characterized by: The preheating mechanism comprises a circular ring (14), the upper end of the connecting portion (24) is fixedly connected to the circular ring (14), the upper end of the knitted fabric tube (21) is fixedly connected to the connecting portion (24), a sliding sleeve (29) is fixedly connected to the inner side of the circular ring (14), the sliding sleeve (29) is sleeved on the side wall of the shell (4), the upper end of the circular ring (14) is fixedly connected to a plurality of tension springs (13), and the upper ends of the plurality of tension springs (13) are all fixed to the upper end of the tank body (3). The inner wall of the knitted fabric tube (21) is fixedly connected to a first fixing ring and a second fixing ring at both inner and outer sides of the lower end of the tube opening, and the upper ends of the first fixing ring and the second fixing ring are both provided with folded edges (37). The side walls of the first circular ring (14) and the second circular ring (14) are fixedly connected to an annular plate (15). The annular plate (15) is fixed in the tank body (3) and is provided with a plurality of water seepage holes (39). The water seepage holes (39) are located between the first fixing ring and the second fixing ring; Two electric heaters (25) are fixedly connected inside the shell (4), and the electric heater (25) is located below the pipe opening of the fresh air duct. One end of the fresh air duct extends into the shell (4) and is fixedly connected to an air distribution box (22). A plurality of air nozzles (28) are fixedly connected to the side wall of the air distribution box (22), and an end cap (36) is fixedly connected inside the second fixing ring.

3. A high-salt wastewater evaporation crystallization zero-discharge equipment according to claim 2, characterized in that: The side wall of the end cap (36) is fixedly connected to a spiral tube (11), the tube wall of the spiral tube (11) is sleeved with a sleeve (38), the upper end of the sleeve (38) is fixedly connected to a bell tube (16), the bell tube (16) is fixed in the tank body (3), one end of the spiral tube (11) extends into the end cap (36), and the other end of the spiral tube (11) passes through the lower end of the tank body (3) and is fixedly connected to the tube wall of the outer tube (1).

4. The high-salinity wastewater evaporation crystallization zero-discharge equipment according to claim 2 is characterized by: The lower end of the gas distribution box (22) is rotatably connected to a vertical shaft (30) via a rolling bearing, and the vertical shaft (30) is rotatably connected to a support frame of the electric heater (25) via a shaft sleeve. The lower end of the shell (4) is provided with a plurality of cutouts, and a transmission frame (26) is sleeved in the plurality of cutouts. The transmission frame (26) passes through the cutouts and is fixedly connected to the inner side of the sliding sleeve (29). The upper end of the transmission frame (26) is provided with a box body (34), and the box body (34) is fixed to the side wall of the lower electric heater (25) bracket. The side wall of the vertical shaft (30) is fixedly connected to a fan blade (23). The lower end extends into the box body (34) and is fixedly connected to a first bevel gear (35); a second bevel gear (31) is meshed on one side of the first bevel gear (35); a side wall of the second bevel gear (31) is fixedly connected to a transverse shaft; two ends of the transverse shaft are rotatably connected in the box body (34) through ball bearings; two eccentric wheels (32) are fixedly connected to the shaft wall of the transverse shaft; two rectangular rods (33) are sleeved on the lower end of the box body (34) through square holes; the lower ends of the two rectangular rods (33) are fixedly connected to the upper end of the transmission frame (26); and the upper ends of the rectangular rods (33) are in contact with the side walls of the eccentric wheels (32).

5. The high-salinity wastewater evaporation and crystallization zero-discharge equipment according to claim 1 is characterized by: The heat exchange mechanism comprises two annular tubes (27), a plurality of heat exchange coils (12) are fixedly connected between the two annular tubes (27), and the plurality of heat exchange coils (12) are sleeved on the side wall of the knitted fabric tube (21), a tube wall of one of the annular tubes (27) is fixedly connected to a conduit, one end of which is fixedly connected to the connecting portion (24), and a tube wall of the other annular tube (27) is fixedly connected to a connecting tube, one end of which extends to the outside of the tank body (3), and a magnetic pump (10) is fixedly connected to one side of the water tank (2), a water inlet end of the magnetic pump (10) is fixedly connected to a water outlet of the water tank (2), and a water outlet end of the magnetic pump (10) is fixedly connected to one end of the connecting tube.

6. The high-salinity wastewater evaporation crystallization zero-discharge equipment according to claim 1 is characterized by: One end of the tail air pipe is fixedly connected to one side of the water tank (2) via a bent pipe, the upper end of the water tank (2) is fixedly connected to one end of the exhaust pipe via a pipe, the bottom of the water tank (2) is provided with an inner concave portion, the inner concave portion is provided with an exhaust port, two partitions (20) are fixedly connected inside the water tank (2), a plurality of heat exchange straight pipes (19) are fixedly connected between the two partitions (20), a raw water pipe is fixedly connected to the side wall of the water tank (2), and one end of the raw water pipe is located between the two partitions (20).

7. The high-salinity wastewater evaporation and crystallization zero-discharge equipment according to claim 1 is characterized by: The evaporation mechanism comprises an iron core (47), the side wall of the iron core (47) being fixedly connected to a plurality of ring sheets (48), a rectangular frame (17) being arranged in the inner tube (8), the two opposite sides of the rectangular frame (17) being in contact with the inner side of the inner tube (8), the side wall of the rectangular frame (17) being fixedly connected to a plurality of spiral strips (42), and the spiral strips (42) being in contact with the inner wall of the inner tube (8), the inner walls of the two opposite sides of the rectangular frame (17) being fixedly connected to a plurality of U-shaped sheets, and the plurality of U-shaped sheets being respectively clamped on the side walls of the ring sheets (48). A scraper (49) is fixedly connected between two adjacent U-shaped pieces, and one side of the scraper (49) contacts the side wall of the iron core (47); one end of the inner tube (8) is fixedly connected to a motor (9); one end of the motor (9) is fixedly connected to a main shaft; one end of the main shaft is coaxially fixedly connected to one end of the iron core (47); the other end of the iron core (47) is fixedly connected to a central shaft; the central shaft is rotatably connected to the inner tube (8) via a bearing seat; and a plurality of high-frequency induction coils (41) are sleeved on the side wall of the inner tube (8).

8. The high-salinity wastewater evaporation crystallization zero-discharge equipment according to claim 7, characterized in that: A gear (46) is fixedly connected to the shaft wall of the main shaft, and a gear shaft (50) is meshed on one side of the gear (46). The gear shaft (50) is rotatably connected to one end of the inner tube (8) through a rolling bearing. The gear shaft (50) is meshed with an inner gear ring (43). A sleeve (45) is fixedly connected at the center of the inner gear ring (43). A sealing plate (44) is fixedly connected in the inner tube (8). The sealing plate (44) is rotatably connected to the side wall of the sleeve (45) through a needle bearing. The inner side of the sleeve (45) is rotatably connected to the shaft wall of the main shaft through a roller bearing. One end of the rectangular frame (17) is coaxially fixedly connected to one end of the sleeve (45) through a circular hole at the center.

9. The high-salinity wastewater evaporation crystallization zero-discharge equipment according to claim 7, characterized in that: An annular block (40) is fixedly connected in the interlayer between the inner tube (8) and the outer tube (1); the inner tube (8) is an iron tube, and a plurality of evenly distributed air inlet holes are provided on its tube wall; the rectangular frame (17), the annular sheet (48), the U-shaped sheet and the scraper (49) are all made of iron, and their surfaces are coated with high temperature resistant materials; and the outer tube (1) is an insulating tube.

10. The high-salinity wastewater evaporation and crystallization zero-discharge equipment according to claim 7, characterized in that: One end of the central shaft is rotatably connected to one end of the inner tube (8) via a needle bearing, and two scrapers (18) are fixedly connected to the shaft wall of the central shaft via a support frame, and both of the scrapers (18) are in contact with the inner wall of the inner tube (8).

Images