A high concentration salt-containing industrial wastewater treatment equipment

Abstract

The present invention relates to the technical field of industrial wastewater treatment, and in particular to a high-concentration salt-containing industrial wastewater treatment equipment, comprising a treatment shell and a separation unit; the separation unit comprises a plurality of separation shells fixedly arranged on the side wall of the treatment shell, the separation shells are evenly distributed around the axis of the treatment shell, the interior of the separation shell is a horizontally horizontal cylindrical cavity structure, a first opening is arranged on one side of the separation shell located inside the treatment shell, the first opening is interconnected with the cavity structure inside the separation shell, a hydrophobic membrane is rotatably arranged inside each separation shell, the hydrophobic membrane is a tubular structure, the axis of the hydrophobic membrane is colinear with the axis of the separation shell, the hydrophobic membrane does not directly contact with the wastewater in the separation shell, a driving unit for driving the hydrophobic membrane to rotate around its own axis is arranged on one side of the hydrophobic membrane, a water collecting pipe is arranged on the side wall of the separation shell on one side of the inner ring of the hydrophobic membrane, and a water collecting bin is arranged at one end of the water collecting pipe away from the separation shell. The present invention prolongs the service life of the hydrophobic membrane.

Description

Technical Field

[0001] The invention relates to the technical field of industrial wastewater treatment, and in particular to equipment for treating high-concentration salt-containing industrial wastewater. Background Art

[0002] Membrane distillation is a membrane technology that uses a hydrophobic microporous membrane to separate aqueous solutions containing non-volatile solutes. However, the cooling effect of existing membrane distillation treatment devices is not ideal, resulting in low efficiency of membrane distillation and the inability to automatically clean up impurities precipitated in wastewater.

[0003] Chinese Patent Publication No. CN115246667A discloses a membrane distillation treatment device for salt-containing industrial wastewater, comprising a support frame, a liquid storage cylinder, a limit frame, a limit spring, a sealing plate, a material guide plate, a heating pipe, an air guide pipe, a separation pipe, a flexible hydrophobic membrane and a liquid guide pipe, wherein a liquid storage cylinder for storing treated wastewater is fixedly connected in the support frame, a liquid guide pipe is connected to the liquid storage cylinder, a separation pipe is connected to the liquid guide pipe, a limit frame is fixedly connected to the right side of the separation pipe, a sealing plate is slidably provided on the limit frame, a limit spring is symmetrically connected between the sealing plate and the limit frame, a material guide plate is fixedly connected to the lower side of the right side of the separation pipe, an air guide pipe is connected to the separation pipe, a heating pipe is connected to the air guide pipe, a flexible hydrophobic membrane is fixedly connected in the separation pipe, and the device is characterized in that it also comprises a cooling mechanism and a driving mechanism, a cooling mechanism for condensing water vapor is arranged between the support frame and the separation pipe, and a driving mechanism is arranged between the liquid storage cylinder and the cooling mechanism.

[0004] The above scheme provides a method for treating saline wastewater. After separating water vapor from wastewater, the concentration of wastewater increases, resulting in impurities being sucked out. The above scheme uses scraping and cleaning to clean the hydrophobic membrane, so the surface of the hydrophobic membrane is easily scratched during cleaning. At the same time, when cleaning the hydrophobic membrane, the water vapor in the wastewater cannot be discharged through the hydrophobic membrane, and the hydrophobic membrane is placed horizontally, resulting in the weight of the wastewater being mostly pressed on the hydrophobic membrane, and the service life of the hydrophobic membrane is very short. The existing membrane distillation method also has a descending distillation method, that is, the wastewater is injected into the hydrophobic membrane from top to bottom, so that the hydrophobic membrane passes through a steam heating chamber, so that the steam in the steam heating chamber heats the wastewater in the hydrophobic membrane, and then the water in the wastewater is heated to form water vapor and discharged. However, since the wastewater treated here is high-concentration saline wastewater, the hydrophobic membrane of the descending distillation method will be blocked by salt crystals after a period of use, and it is difficult to clean, and the cost of use is high. Summary of the invention

[0005] In view of the above problems, a high-concentration salt-containing industrial wastewater treatment equipment is provided. A hydrophobic membrane that does not directly contact the wastewater is arranged on the side wall of the outer shell, and the wastewater in the outer shell is heated by a steam generating unit. As the temperature rises, the wastewater is continuously concentrated, and the water in the wastewater is converted into water vapor and enters the inner ring of the hydrophobic membrane, and is finally discharged into a water collecting bin through a collecting pipe, thereby preventing the hydrophobic membrane from being blocked by salt crystals in the wastewater.

[0006] To solve the problems of the prior art, the present invention provides a high-concentration salt-containing industrial wastewater treatment equipment, comprising a treatment shell for storing wastewater and a separation unit arranged on the side wall of the treatment shell, wherein a steam generating unit is arranged in the treatment shell; the separation unit comprises a plurality of separation shells fixedly arranged on the side wall of the treatment shell, the separation shells are evenly distributed around the axis of the treatment shell, the interior of the separation shell is a horizontally horizontal cylindrical cavity structure, a first opening is arranged on one side of the separation shell located inside the treatment shell, the first opening is interconnected with the cavity structure inside the separation shell, a hydrophobic membrane is rotatably arranged inside each separation shell, the hydrophobic membrane is a tubular structure, the axis of the hydrophobic membrane is colinear with the axis of the separation shell, the hydrophobic membrane does not directly contact with the wastewater in the separation shell, a driving unit for driving the hydrophobic membrane to rotate around its own axis is arranged on one side of the hydrophobic membrane, a water collecting pipe is arranged on the side wall of the separation shell on one side of the inner ring of the hydrophobic membrane, a water collecting bin is arranged on the end of the water collecting pipe away from the separation shell, the water vapor in the treatment shell passes through the hydrophobic membrane into the inner ring side of the hydrophobic membrane, and is discharged into the water collecting bin through the water collecting pipe for collection.

[0007] Preferably, a first air pump is provided on the water collecting pipe, and an air intake pipe connected to the inner ring of the hydrophobic membrane is provided at the end of the separation shell. The air intake pipe and the water collecting pipe are respectively located on both sides of the separation shell. A fan is provided at the upper end of the air intake pipe. The fan is used to introduce external air into the air intake pipe, and the first air pump is used to introduce air in the inner ring of the hydrophobic membrane into the water collecting bin. The gas suction volume of the first air pump is greater than the air intake volume of the fan.

[0008] Preferably, a rated amount of water source is stored in the water collecting bin, the lower end of the water collecting pipe extends below the liquid level in the water collecting bin, and a pressure relief valve is provided at the upper portion of the water collecting bin.

[0009] Preferably, the driving unit includes a bracket with a cylindrical structure, which is arranged on one side of the inner ring of the hydrophobic membrane and contacts the inner ring side wall of the hydrophobic membrane. The bracket rotates synchronously with the hydrophobic membrane. A first gear ring is fixedly arranged at one end of the bracket, and a first gear is meshed on one side of the first gear ring.

[0010] Preferably, a first bevel gear is arranged above the first gear, and a belt synchronization assembly is arranged between the first bevel gear and the first gear, and the first bevel gear drives the first gear to rotate through the belt synchronization assembly, and a second bevel gear is meshed with one side of the first bevel gear, and a second gear is fixedly arranged on the upper end of the second bevel gear, and a second gear ring is arranged on the periphery of the outer shell so as to rotate around the axis of the outer shell, and the second gear ring is meshed with the second gear, and a plurality of second gears are arranged around the second gear ring, and the second gears correspond to the hydrophobic membranes one by one, and a first rotation driver for driving the second gear is arranged on the upper end of one of the second gears.

[0011] Preferably, a plurality of steam ports are provided at the bottom of the processing shell, and a steam generator is provided at one side of the processing shell. The steam generator is communicated with the steam ports and provides steam for the steam ports.

[0012] Preferably, a second opening is provided on the separation shell on the side opposite to the first opening, a blowing pipe is horizontally arranged on the inner ring side of the hydrophobic membrane, a plurality of blowing holes are provided on the blowing pipe along the extension direction of the blowing pipe, the blowing holes face the second opening, a second air pump is connected to one end of the blowing pipe, and the second air pump supplies air to the blowing pipe.

[0013] Preferably, a self-cleaning unit for cleaning salt crystals at the bottom of the processing shell is provided at the bottom of the processing shell, the self-cleaning unit includes a first discharge groove opened at the bottom of the processing shell along the radial direction of the processing shell, and a cleaning rod is provided at the bottom of the processing shell for rotation around the axis of the processing shell, the cleaning rod is slidably matched with the bottom of the processing shell, and a circular sweeping area formed by the rotation of the cleaning rod completely overlaps with the bottom of the processing shell.

[0014] Preferably, a transfer disk is rotatably arranged at the bottom of the processing shell, the axis of the rotating disk is colinear with the axis of the processing shell, the cleaning rod is fixedly connected to the rotating disk and rotates synchronously with the rotating disk, and a rotating groove is opened on the rotating disk along the radial direction of the rotating disk. When the rotating disk rotates, the rotating groove can completely overlap with the first discharge groove.

[0015] Preferably, a supporting shell is provided at the lower part of the transfer disk, the supporting shell is fixedly connected to the processing shell, a second discharge groove is opened at the bottom of the supporting shell along the radial direction of the transfer disk, when the transfer disk rotates, the transfer groove can coincide with the second discharge groove, the projections of the first discharge groove and the second discharge groove in the vertical direction are staggered, and a second rotating drive for driving the transfer disk to rotate is vertically arranged at the bottom of the supporting shell.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Inject a rated amount of salt-containing industrial wastewater into the treatment shell. At this time, the steam generating unit in the treatment shell is started, and the steam generating unit injects water vapor into the treatment shell. The wastewater in the treatment shell is heated and heated, and finally the water in the wastewater evaporates and converts into water vapor. The water vapor enters the separation shell from the first opening of the separation shell on the side wall of the treatment shell and passes through the hydrophobic membrane. Since the hydrophobic membrane is not in direct contact with the salt-containing wastewater, when the water in the wastewater evaporates, the salt crystals precipitated in the wastewater will not adhere to the hydrophobic membrane. In this way, the situation in which the hydrophobic membrane is quickly blocked by salt crystals during the concentration process of the wastewater is avoided, and the service life of the hydrophobic membrane is extended. At the same time, the water collecting pipe is extended to below the liquid level of the water collecting bin, so that the water vapor can be quickly cooled after entering the water collecting bin, thereby condensing into water droplets, which is convenient for the water collecting bin to collect water vapor. The pressure relief valve arranged on the upper part of the water collecting bin can timely remove the air discharged into the water collecting bin.

[0018] 2. The driving unit drives the hydrophobic membrane to rotate around its own axis, thereby preventing the hydrophobic membrane from always using the same position to filter water vapor. At the same time, by arranging the first air pump and the fan, the air in the inner ring of the hydrophobic membrane can flow along the axis of the hydrophobic ring, that is, the air flows from the air inlet pipe side along the axis of the hydrophobic membrane toward the water collecting pipe side, thereby preventing water vapor from condensing into water droplets and gathering on the inner ring of the hydrophobic membrane, thereby preventing the hydrophobic membrane from rubbing against the separation shell during rotation, thereby extending the service life of the hydrophobic membrane.

[0019] 3. By setting up a self-cleaning unit, it is realized that the self-cleaning unit can automatically clean the salt crystals at the bottom of the treatment shell, ensuring that the wastewater treatment equipment can continue to operate during cleaning. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of a high-concentration salt-containing industrial wastewater treatment device of the present invention.

[0021] Figure 2 This is a three-dimensional schematic diagram of a high-concentration salt-containing industrial wastewater treatment equipment of the present invention after removing the outer shell Figure 1 .

[0022] Figure 3 This is a cutaway stereoscopic diagram of a high-concentration salt-containing industrial wastewater treatment device of the present invention after removing the outer shell. Figure 1 .

[0023] Figure 4 The invention is a high-concentration salt-containing industrial wastewater treatment equipment Figure 3 A local enlarged schematic diagram of point A in the middle.

[0024] Figure 5 The invention is a high-concentration salt-containing industrial wastewater treatment equipment Figure 3 A local enlarged schematic diagram of point B in the middle.

[0025] Figure 6 This is a three-dimensional schematic diagram of a high-concentration salt-containing industrial wastewater treatment device of the present invention after removing the outer shell Figure 2 .

[0026] Figure 7 It is a three-dimensional schematic diagram of a high-concentration salt-containing industrial wastewater treatment device of the present invention with the outer shell and the treatment shell removed.

[0027] Figure 8 The invention is a high-concentration salt-containing industrial wastewater treatment equipment Figure 7 A partial enlarged schematic diagram of point C in the middle.

[0028] Fig. 9 It is a cutaway stereoscopic schematic diagram of a high-concentration salt-containing industrial wastewater treatment device of the present invention with the outer shell and the treatment shell removed.

[0029] Fig.10 The invention is a high-concentration salt-containing industrial wastewater treatment equipment Fig. 9 A partial enlarged schematic diagram of point D in the middle.

[0030] Fig.11 This is a cutaway perspective view of a high-concentration salt-containing industrial wastewater treatment device of the present invention after removing the outer shell. Figure 2 .

[0031] Fig.12 The invention is a high-concentration salt-containing industrial wastewater treatment equipment Fig.11 A partial enlarged schematic diagram of point E in the middle.

[0032] The numbers in the figure are:

[0033] 1. Processing shell; 2. Separation unit; 21. Hydrophobic membrane; 211. Second air pump; 212. Blowing pipe; 22. Driving unit; 221. Bracket; 222. First gear ring; 223. First gear; 224. Belt-type synchronous assembly; 2241. Synchronous wheel; 2242. Synchronous belt; 225. First bevel gear; 226. Second bevel gear; 227. Second gear ring; 228. Second gear; 229. First rotary driver; 23. Separation shell; 24. Water collecting bin; 241. Pressure relief valve; 25. Water collecting pipe; 26. First air pump; 27. Air inlet pipe; 271. Fan; 3. Steam generating unit; 31. Steam port; 32. Steam generator; 4. Self-cleaning unit; 41. First discharge trough; 42. Cleaning rod; 43. Transfer plate; 44. Transfer trough; 45. Support shell; 451. Second discharge trough; 46. Second rotary driver. DETAILED DESCRIPTION

[0034] In order to further understand the features, technical means, specific objectives and functions of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0035] Reference Figure 1-Figure 3 , Figure 5 , Figure 6 and Fig. 9 : A high-concentration salt-containing industrial wastewater treatment equipment, comprising a treatment shell 1 for storing wastewater and a separation unit 2 arranged on the side wall of the treatment shell 1, wherein a steam generating unit 3 is arranged in the treatment shell 1; the separation unit 2 comprises a plurality of separation shells 23 fixedly arranged on the side wall of the treatment shell 1, the separation shells 23 are evenly distributed around the axis of the treatment shell 1, the interior of the separation shell 23 is a horizontally arranged cylindrical cavity structure, a first opening is arranged on one side of the separation shell 23 located inside the treatment shell 1, the first opening is communicated with the internal cavity structure of the separation shell 23, and a rotating A hydrophobic membrane 21 is provided, and the hydrophobic membrane 21 is a tubular structure. The axis of the hydrophobic membrane 21 is colinear with the axis of the separation shell 23. The hydrophobic membrane 21 does not directly contact the wastewater in the separation shell 23. A driving unit 22 for driving the hydrophobic membrane 21 to rotate around its own axis is provided on one side of the hydrophobic membrane 21. A water collecting pipe 25 is provided on the side wall of the separation shell 23 on the inner ring side of the hydrophobic membrane 21. A water collecting bin 24 is provided on the end of the water collecting pipe 25 away from the separation shell 23. The water vapor in the treatment shell 1 passes through the hydrophobic membrane 21 and enters the inner ring side of the hydrophobic membrane 21, and is discharged into the water collecting bin 24 for collection through the water collecting pipe 25.

[0036] In the prior art, when industrial wastewater is treated by membrane distillation, the hydrophobic membrane 21 used for membrane distillation is the key to wastewater treatment. The main working process is to arrange the tubular hydrophobic membrane 21 vertically, and a steam generating unit 3 is arranged in the vertical direction of the hydrophobic membrane 21. The hydrophobic membrane 21 passes through the steam generating unit 3. The steam in the steam generating unit 3 has a heating effect on the hydrophobic membrane 21. When separating, the wastewater is poured from the upper part of the hydrophobic membrane 21, and then the wastewater flows down in the hydrophobic membrane 21 in the vertical direction. When the wastewater passes the position of the steam generating unit 3, the steam generating unit 3 The steam in unit 3 heats the wastewater in the hydrophobic membrane 21. Due to the characteristics of the hydrophobic membrane 21, the water vapor evaporated into gaseous state can be discharged through the hydrophobic membrane 21, so that the wastewater is continuously concentrated. However, when the wastewater flows in the hydrophobic membrane 21 in the vertical direction, the downward flow rate of the wastewater cannot be controlled. If it is necessary to improve the concentration effect of the wastewater, the hydrophobic membrane 21 needs to be extended. However, if the wastewater is a high-concentration salt-containing industrial wastewater, the hydrophobic membrane 21 will have disadvantages at this time, that is, the salt-containing wastewater will form crystals on the side wall of the hydrophobic membrane 21 after concentration, which will cause the hydrophobic membrane 21 to be blocked. If the direct heating method is used to concentrate the wastewater, the evaporated steam at this time contains not only water vapor, but also other harmful vapors. In this way, using the hydrophobic membrane 21 to concentrate and separate the wastewater still has advantages, but the service life is too low.

[0037] In order to avoid the above problems, a separation unit 2 is provided on the side wall of the processing shell 1, and the hydrophobic membrane 21 is redesigned. The specific structure and working process are as follows:

[0038] A rated amount of saline industrial wastewater is injected into the treatment shell 1 from the top of the treatment shell 1. At this time, the steam generating unit 3 in the treatment shell 1 is started, and the steam generating unit 3 injects water vapor into the treatment shell 1. The wastewater in the treatment shell 1 is heated and heated, and finally the water in the wastewater evaporates and converts into water vapor. The water vapor enters the separation shell 23 from the first opening of the separation shell 23 on the side wall of the treatment shell 1, and passes through the hydrophobic membrane 21. Since the hydrophobic membrane 21 is not in direct contact with the saline wastewater, when the water in the wastewater evaporates, the salt crystals precipitated in the wastewater will not adhere to the hydrophobic membrane 21, thereby avoiding the situation where the salt crystals quickly block the hydrophobic membrane 21 during the concentration process of the wastewater. At the same time, the driving unit 22 drives the hydrophobic membrane 21 to rotate around its own axis, avoiding the hydrophobic membrane 21 from always using the same position to filter water vapor. This is because after the industrial wastewater is heated, not only water vapor is generated, but also other harmful vapors, such as some volatile salt substances, organic matter, etc., and the above-mentioned harmful vapors cannot pass through the hydrophobic membrane 21. If the hydrophobic membrane 21 cannot rotate, the hydrophobic membrane 21 will still be blocked after a period of time. The rotation of the hydrophobic membrane 21 increases the service life of the hydrophobic membrane 21 and extends the replacement cycle of the hydrophobic membrane 21. A water collecting pipe 25 is set at one end of the separation shell 23 to The water vapor entering the inner ring of the hydrophobic membrane 21 is guided so that the water vapor does not stay in the hydrophobic membrane 21. Instead, after the water vapor enters the inner ring of the hydrophobic membrane 21, the water collecting pipe 25 can discharge the water vapor into the water collecting bin 24 in time, avoiding the situation that the water vapor stays and condenses after entering the inner ring of the hydrophobic membrane 21. Otherwise, the condensed water will remain on the inner ring side of the hydrophobic membrane 21. When the hydrophobic membrane 21 rotates, the water in the inner ring of the hydrophobic membrane 21 rotates synchronously, and the weight of the water exerts pressure on the hydrophobic membrane 21, which increases the wear between the hydrophobic membrane 21 and the separation shell 23, thereby causing the hydrophobic membrane 21 to wear excessively during the rotation process. After the water collecting pipe 25 is set, the above situation can be avoided.

[0039] Reference Figure 7 : A first air pump 26 is arranged on the water collecting pipe 25, and an air intake pipe 27 connected with the inner ring of the hydrophobic membrane 21 is arranged at the end of the separation shell 23. The air intake pipe 27 and the water collecting pipe 25 are respectively located on both sides of the separation shell 23. A fan 271 is arranged at the upper end of the air intake pipe 27. The fan 271 is used to introduce external air into the air intake pipe 27, and the first air pump 26 is used to introduce the air in the inner ring of the hydrophobic membrane 21 into the water collecting bin 24. The gas suction amount of the first air pump 26 is greater than the air intake amount of the fan 271.

[0040] After the steam generating unit 3 is started, the steam generating unit 3 will discharge water vapor into the processing shell 1, so that the wastewater in the processing shell 1 is gradually heated, and finally the water in the wastewater will be converted into water vapor and rise. There is a difference in the gas flow rate of the water collecting pipe 25 and the air inlet pipe 27 respectively arranged at the two ends of the separation shell 23, that is, the air inlet pipe 27 realizes active air intake through the rotation of the fan 271, and when the fan 271 is running, the first air pump 26 arranged on the water collecting pipe 25 is also in operation, but the gas flow rate at the first air pump 26 is greater than the gas flow rate at the fan 271, so that at the inner ring of the hydrophobic membrane 21, not only an airflow flowing from the air inlet pipe 27 side to the water collecting pipe 25 side along the axial direction of the hydrophobic membrane 21 can be formed, but also a negative pressure can be formed at the inner ring of the hydrophobic membrane 21, so that the water vapor in the processing shell 1 generates attraction, which assists the rising water vapor in the processing shell 1 to pass through the hydrophobic membrane 21 faster and be discharged through the water collecting pipe 25. Since the air inlet pipe 27 is connected to the outside world and the operating power of the first air pump 26 is constant, when the amount of water vapor in the processing shell 1 entering the inner ring of the hydrophobic membrane 21 is small, the negative pressure in the inner ring of the hydrophobic membrane 21 can automatically inhale air from the outside through the air inlet pipe 27, so that the water vapor entering the inner ring of the hydrophobic membrane 21 will not stay in the hydrophobic ring, but can be quickly discharged through the water collecting pipe 25.

[0041] Reference Figure 6 and Fig.10 A rated amount of water is stored in the water collecting bin 24 , the lower end of the water collecting pipe 25 extends below the liquid level in the water collecting bin 24 , and a pressure relief valve 241 is provided at the upper portion of the water collecting bin 24 .

[0042] Since the temperature of water vapor is relatively high, it needs to be lowered to a certain temperature before it can condense. In this way, extending the water collecting pipe 25 to below the liquid surface of the water collecting bin 24 can allow the water vapor to cool down quickly after entering the water collecting bin 24, thereby condensing into water droplets, thereby facilitating the collection of water vapor by the water collecting bin 24. The pressure relief valve 241 arranged on the upper part of the water collecting bin 24 can discharge the air discharged into the water collecting bin 24 in time.

[0043] Reference Figure 7 and Figure 8 The driving unit 22 includes a bracket 221 with a cylindrical structure. The bracket 221 is arranged on one side of the inner ring of the hydrophobic membrane 21 and contacts the inner ring side wall of the hydrophobic membrane 21. The bracket 221 rotates synchronously with the hydrophobic membrane 21. A first toothed ring 222 is fixedly arranged at one end of the bracket 221, and a first gear 223 is meshed with one side of the first toothed ring 222.

[0044] Reference Figure 4 , Figure 6 and Figure 8: A first bevel gear 225 is arranged above the first gear 223, and a belt synchronization component 224 is arranged between the first bevel gear 225 and the first gear 223. The first bevel gear 225 drives the first gear 223 to rotate through the belt synchronization component 224. A second bevel gear 226 is meshed on one side of the first bevel gear 225, and a second gear 228 is fixedly arranged on the upper end of the second bevel gear 226. A second gear ring 227 is arranged on the periphery of the shell to rotate around the axis of the shell. The second gear ring 227 and the second gear 228 are meshed with each other. A plurality of second gears 228 are arranged around the second gear ring 227, and the second gears 228 correspond to the hydrophobic membrane 21 one by one. A first rotation driver 229 that drives the second gear 228 is arranged on the upper end of one of the second gears 228.

[0045] The first rotation driver 229 is preferably a servo motor, and the belt-type synchronous assembly 224 includes two synchronous wheels 2241 and a synchronous belt 2242. The two synchronous wheels 2241 are respectively fixedly arranged at the ends of the first bevel gear 225 and the first gear 223, and the synchronous belt 2242 is respectively sleeved on the two synchronous wheels 2241. The synchronous wheels 2241 and the synchronous belt 2242 are matched in transmission. In this way, when the first rotation driver 229 drives one of the second gears 228 to rotate, the second gear 228 drives the second gear ring 227 to rotate, thereby causing all the second gears 228 to rotate. Under the transmission of the first bevel gear 225, the second bevel gear 226, the belt-type synchronous assembly 224, the first gear 223 and the first gear ring 222 corresponding to each hydrophobic membrane 21, all the hydrophobic membranes 21 can rotate synchronously.

[0046] Reference Figure 1 , Figure 2 and Figure 6 A plurality of steam ports 31 are disposed at the bottom of the processing shell 1 , and a steam generator 32 is disposed at one side of the processing shell 1 . The steam generator 32 is connected to the steam ports 31 and provides steam to the steam ports 31 .

[0047] There is water in the steam generator 32. After the steam generator 32 heats the water into water vapor, the water vapor is discharged to the steam port 31, and the water vapor is discharged into the outer shell through the steam port 31. When the water vapor just enters the outer shell, since the temperature of the wastewater before being heated by the water vapor is relatively low, the water vapor will condense in the outer shell and merge into the wastewater. After a period of time, the temperature of the wastewater gradually rises, and the moisture in the wastewater gradually turns into water vapor, and condensation is not easy to occur. This is because the temperature inside the processing shell 1 is relatively high, and water vapor can only condense when the temperature is relatively low. In this way, it can be ensured that the water vapor can smoothly pass through the hydrophobic membrane 21, and condense into water droplets in the water collecting bin 24 after being guided by the water collecting pipe 25.

[0048] Reference Fig.10: A second opening is provided on the separation shell 23 on the side opposite to the first opening, and a blowing pipe 212 is horizontally arranged on the inner ring side of the hydrophobic membrane 21. A plurality of blowing holes are provided on the blowing pipe 212 along the extension direction of the blowing pipe 212, and the blowing holes face the second opening. A second air pump 211 is connected to one end of the blowing pipe 212, and the second air pump 211 supplies air to the blowing pipe 212.

[0049] As can be seen from the foregoing, in addition to water vapor, there are other harmful vapors in the steam. The harmful vapor cannot pass through the hydrophobic membrane 21, so it will adhere to the outside of the hydrophobic membrane 21, which will cause the hydrophobic membrane 21 to be blocked after long-term use. In order to avoid the hydrophobic membrane 21 from being blocked during use, a blowing pipe 212 is arranged inside the hydrophobic membrane 21. The blowing pipe 212 generates a high-speed airflow from the inside to the outside of the hydrophobic membrane 21, so that the substances attached to the hydrophobic membrane 21 are blown off, thereby realizing self-cleaning of the hydrophobic membrane 21 and further extending the service life of the hydrophobic membrane 21.

[0050] Reference Figure 3 and Fig.12 A self-cleaning unit 4 for cleaning salt crystals at the bottom of the processing shell 1 is arranged at the bottom of the processing shell 1. The self-cleaning unit 4 includes a first discharge groove 41 opened at the bottom of the processing shell 1 along the radial direction of the processing shell 1, and a cleaning rod 42 is arranged at the bottom of the processing shell 1 to rotate around the axis of the processing shell 1. The cleaning rod 42 is slidably matched with the bottom of the processing shell 1, and the circular sweeping area formed by the rotation of the cleaning rod 42 completely overlaps with the bottom of the processing shell 1.

[0051] Reference Fig.12 A rotating disk is rotatably arranged at the bottom of the processing shell 1, and the axis of the rotating disk is colinear with the axis of the processing shell 1. The cleaning rod 42 is fixedly connected to the transfer disk 43 and rotates synchronously with the rotating disk. A rotating groove is opened on the rotating disk along the radial direction of the rotating disk. When the rotating disk rotates, the rotating groove can completely overlap with the first discharge groove 41.

[0052] Reference Fig.11 and Fig.12 A supporting shell 45 is sleeved on the lower part of the transfer disc 43, and the supporting shell 45 is fixedly connected to the processing shell 1. A second discharge groove 451 is opened at the bottom of the supporting shell 45 along the radial direction of the transfer disc 43. When the transfer disc 43 rotates, the transfer groove 44 can coincide with the second discharge groove 451. The projections of the first discharge groove 41 and the second discharge groove 451 in the vertical direction are staggered. A second rotating driver 46 for driving the transfer disc 43 to rotate is vertically arranged at the bottom of the supporting shell.

[0053] The second rotary driver 46 is preferably a servo motor. When the second rotary driver 46 is started, the transfer disc 43 and the cleaning rod 42 rotate synchronously. The rotating cleaning rod 42 scrapes off the salt crystals at the bottom of the treatment shell 1. When the cleaning rod 42 passes through the first discharge groove 41, the salt crystals fall into the first discharge groove 41. When the transfer groove 44 in the transfer disc 43 rotates to the position of the first discharge groove 41, the salt crystals fall into the transfer groove 44. As the transfer disc 43 continues to rotate, when the transfer groove 44 drives the salt crystals to move to the second discharge groove 451, the salt crystals in the transfer groove 44 can be discharged through the second discharge groove 451. Since the salt crystals are of large mass, they are mostly sunk to the bottom of the treatment shell 1 after concentration. In this way, there is only a small amount of wastewater in the salt crystals discharged from the second discharge groove 451.

[0054] Working principle: A rated amount of saline industrial wastewater is injected into the treatment shell 1. At this time, the steam generating unit 3 in the treatment shell 1 is started, and the steam generating unit 3 injects water vapor into the treatment shell 1. The wastewater in the treatment shell 1 is heated and heated, and finally the water in the wastewater evaporates and converts into water vapor. The water vapor enters the separation shell 23 from the first opening of the separation shell 23 on the side wall of the treatment shell 1, and passes through the hydrophobic membrane 21. Since the hydrophobic membrane 21 is not in direct contact with the saline wastewater, when the water in the wastewater evaporates, the salt crystals precipitated in the wastewater will not adhere to the hydrophobic membrane 21, thus avoiding the situation where the hydrophobic membrane 21 is quickly blocked by salt crystals during the concentration process of the wastewater.

[0055] The above embodiments only express one or several implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the protection scope of the present invention. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the attached claims.

Claims

1. A high-concentration salt-containing industrial wastewater treatment device, comprising a treatment shell (1) for storing wastewater and a separation unit (2) arranged on a side wall of the treatment shell (1), wherein a steam generating unit (3) is arranged in the treatment shell (1); It is characterized in that The separation unit (2) comprises a plurality of separation shells (23) fixedly arranged on the side wall of the processing shell (1); the separation shells (23) are evenly distributed around the axis of the processing shell (1); the interior of the separation shell (23) is a horizontally arranged cylindrical cavity structure; a first opening is arranged on one side of the separation shell (23) located inside the processing shell (1); the first opening is interconnected with the cavity structure inside the separation shell (23); a hydrophobic membrane (21) is rotatably arranged in each separation shell (23); the hydrophobic membrane (21) is a tubular structure; the axis of the hydrophobic membrane (21) is aligned with the axis of the separation shell (23); The lines are co-linear, the hydrophobic membrane (21) does not directly contact the wastewater in the separation shell (23), a driving unit (22) for driving the hydrophobic membrane (21) to rotate around its own axis is arranged on one side of the hydrophobic membrane (21), a water collecting pipe (25) is arranged on the side wall of the separation shell (23) on the inner ring side of the hydrophobic membrane (21), and a water collecting bin (24) is arranged at one end of the water collecting pipe (25) away from the separation shell (23), and the water vapor in the treatment shell (1) passes through the hydrophobic membrane (21) and enters the inner ring side of the hydrophobic membrane (21), and is discharged into the water collecting bin (24) for collection through the water collecting pipe (25).

2. A high-concentration saline industrial wastewater treatment equipment according to claim 1, characterized in that: A first air pump (26) is arranged on the water collecting pipe (25), and an air intake pipe (27) which is in communication with the inner ring of the hydrophobic membrane (21) is arranged at the end of the separation shell (23). The air intake pipe (27) and the water collecting pipe (25) are respectively located on both sides of the separation shell (23). A fan (271) is arranged at the upper end of the air intake pipe (27). The fan (271) is used to introduce external air into the air intake pipe (27). The first air pump (26) is used to introduce the air in the inner ring of the hydrophobic membrane (21) into the water collecting bin (24). The gas intake amount of the first air pump (26) is greater than the air intake amount of the fan (271).

3. A high-concentration saline industrial wastewater treatment equipment according to claim 1, characterized in that: A rated amount of water source is stored in the water collecting bin (24), the lower end of the water collecting pipe (25) extends below the liquid level in the water collecting bin (24), and a pressure relief valve (241) is provided at the upper part of the water collecting bin (24).

4. A high-concentration saline industrial wastewater treatment equipment according to claim 1, characterized in that: The driving unit (22) comprises a support (221) having a cylindrical structure. The support (221) is arranged on one side of the inner ring of the hydrophobic membrane (21) and contacts the inner ring side wall of the hydrophobic membrane (21). The support (221) rotates synchronously with the hydrophobic membrane (21). A first toothed ring (222) is fixedly arranged at one end of the support (221), and a first gear (223) is meshed with one side of the first toothed ring (222).

5. A high-concentration saline industrial wastewater treatment equipment according to claim 4, characterized in that: A first bevel gear (225) is arranged above the first gear (223), a belt-type synchronous assembly (224) is arranged between the first bevel gear (225) and the first gear (223), the first bevel gear (225) drives the first gear (223) to rotate through the belt-type synchronous assembly (224), a second bevel gear (226) is meshed on one side of the first bevel gear (225), a second gear (228) is fixedly arranged on the upper end of the second bevel gear (226), a second gear ring (227) is arranged on the periphery of the housing to rotate around the axis of the housing, the second gear ring (227) and the second gear (228) are meshed with each other, a plurality of second gears (228) are arranged around the second gear ring (227), and the second gears (228) correspond to the hydrophobic membrane (21) one by one, and a first rotation driver (229) for driving the second gear (228) is arranged on the upper end of one of the second gears (228).

6. A high-concentration saline industrial wastewater treatment equipment according to claim 1, characterized in that: A plurality of steam ports (31) are arranged at the bottom of the processing shell (1), and a steam generator (32) is arranged on one side of the processing shell (1); the steam generator (32) is connected to the steam ports (31) and provides steam for the steam ports (31).

7. The high-concentration saline industrial wastewater treatment equipment according to claim 1, characterized in that: A second opening is provided on the separation shell (23) on the side opposite to the first opening, and a blowing pipe (212) is horizontally arranged on the inner ring side of the hydrophobic membrane (21), and a plurality of blowing holes are provided on the blowing pipe (212) along the extension direction of the blowing pipe (212), and the blowing holes face the second opening, and a second air pump (211) is connected to one end of the blowing pipe (212), and the second air pump (211) supplies air to the blowing pipe (212).

8. The high-concentration saline industrial wastewater treatment equipment according to claim 1, characterized in that: A self-cleaning unit (4) is provided at the bottom of the processing shell (1) for cleaning salt crystals at the bottom of the processing shell (1). The self-cleaning unit (4) comprises a first discharge groove (41) provided at the bottom of the processing shell (1) along the radial direction of the processing shell (1). A cleaning rod (42) is provided at the bottom of the processing shell (1) to rotate around the axis of the processing shell (1). The cleaning rod (42) is in sliding engagement with the bottom of the processing shell (1), and a circular sweeping area formed by the rotation of the cleaning rod (42) completely overlaps with the bottom of the processing shell (1).

9. A high-concentration saline industrial wastewater treatment equipment according to claim 8, characterized in that: A transfer disc (43) is rotatably arranged at the bottom of the processing shell (1), the axis of the rotating disc being colinear with the axis of the processing shell (1), the cleaning rod (42) being fixedly connected to the rotating disc and rotating synchronously with the rotating disc, and a rotating groove is provided on the rotating disc along the radial direction of the rotating disc, and when the rotating disc rotates, the rotating groove can completely overlap with the first discharge groove (41).

10. A high-concentration saline industrial wastewater treatment equipment according to claim 9, characterized in that: A supporting shell (45) is sleeved on the lower part of the transfer plate (43), and the supporting shell (45) is fixedly connected to the processing shell (1). A second discharge groove (451) is opened at the bottom of the supporting shell (45) along the radial direction of the transfer plate (43). When the transfer plate (43) rotates, the transfer groove (44) can overlap with the second discharge groove (451), and the projections of the first discharge groove (41) and the second discharge groove (451) in the vertical direction are arranged in an alternating manner. A second rotating driver (46) for driving the transfer plate (43) to rotate is vertically arranged at the bottom of the supporting shell (45).

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