A device for treating wastewater from deep processing of coal tar

Abstract

The present invention relates to the technical field of wastewater treatment, and specifically provides a wastewater treatment device for deep processing of coal tar, including: four RO reverse osmosis membrane modules arranged successively from top to bottom and two water tanks. Both ends of the RO reverse osmosis membrane module are communicated with the two water tanks respectively, and an opening and closing adjustment mechanism is installed on the water tank. Through the cooperation of the screw rod, the rotating cylinder, the single-stop plugging group and the multi-stage adjustment group, the present invention can not only achieve separate control of the closing of the ports at both ends of each RO reverse osmosis membrane module, but also control the closing of the ports at both ends of two or three RO reverse osmosis membrane modules according to the change of demand, enabling the continuous treatment of wastewater, improving the efficiency of wastewater treatment and the operation flexibility of the wastewater treatment device during the cleaning of the RO reverse osmosis membrane module. When the treatment device is not in use, the multi-stage adjustment group can also simultaneously close the ports at both ends of the four RO reverse osmosis membrane modules, improving the flexibility and versatility of the overall treatment device in adjusting the use according to the flow rate of coal tar wastewater.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and specifically provides a device for treating coal tar deep processing wastewater. Background Art

[0002] RO reverse osmosis is a membrane separation technology. Utilizing the selective permeability of a semi-permeable membrane, under the action of an applied pressure, water molecules are allowed to pass through the membrane while most dissolved solutes (such as salts, organic substances, etc.) are blocked; for coal tar deep processing wastewater, RO reverse osmosis can effectively reduce the conductivity of the wastewater and reduce the content of harmful substances therein. However, before RO reverse osmosis, it is usually necessary to pre-treat the coal tar deep processing wastewater to remove suspended solids, fine particles, oils and fats, and other macromolecular organic substances that can cause blockage, damage or pollution of the RO membrane.

[0003] With the continuous operation of the RO reverse osmosis system, various impurities in the pre-treated coal tar deep processing wastewater will gradually deposit on the surface of the RO reverse osmosis membrane, forming fouling; these fouling include inorganic salts (such as calcium, magnesium, iron, etc.), organic substances, microorganisms and their metabolites, etc. If the RO reverse osmosis membrane module is not cleaned in time, it will cause defects such as a decrease in membrane flux, a reduction in desalination efficiency, an increase in operating pressure, and a shortening of the membrane life.

[0004] For traditional wastewater treatment devices, when cleaning multiple RO reverse osmosis membrane modules, either directly close the total wastewater inlet and the total purified water discharge port of multiple RO reverse osmosis membrane modules, and then clean multiple RO reverse osmosis membrane modules simultaneously through a backwashing device, or control the on-off of each end of the RO reverse osmosis membrane module through a single valve. The former will cause the wastewater to no longer be treated during the cleaning process of the RO reverse osmosis membrane module, and the wastewater treatment process needs to be interrupted, reducing the efficiency and flexibility of wastewater treatment; the latter operation is more cumbersome. When closing two or three or all RO reverse osmosis membrane modules, multiple valves need to be closed. Due to the large number of valves, it is easy to have misoperations resulting in the situation where the wastewater inlet or the purified water discharge port at both ends of the RO reverse osmosis membrane module is opened during the cleaning process, thereby affecting the cleaning effect of the RO reverse osmosis membrane module. Summary of the Invention

[0005] In view of the above problems, the embodiments of the present application provide a device for treating coal tar deep processing wastewater to solve the technical problems in the related art.

[0006] To achieve the above object, the embodiments of the present application provide the following technical solutions: A coal tar deep processing wastewater treatment device, comprising: four RO reverse osmosis membrane modules arranged in sequence from top to bottom. The RO reverse osmosis membrane module is provided with a backwash drain port, a backwash inlet, and a waste liquid discharge port; one end of the RO reverse osmosis membrane module is a purified water discharge port, and the other end is a wastewater inlet. A backwash drain port is installed on the side wall of the RO reverse osmosis membrane module near the purified water discharge port thereof, a backwash inlet is installed on the side wall of the RO reverse osmosis membrane module near the wastewater inlet thereof, and a waste liquid discharge port is further installed on the side wall of the RO reverse osmosis membrane module near the backwash inlet.

[0007] The coal tar deep processing wastewater treatment device further comprises two water tanks. Both ends of the RO reverse osmosis membrane module are communicated with the two water tanks respectively. An opening and closing adjustment mechanism is installed on the water tanks. The two opening and closing adjustment mechanisms have the same structure and are symmetrically arranged along the axial direction of the RO reverse osmosis membrane module.

[0008] The opening and closing adjustment mechanism comprises four fixing frames installed between two inner walls of the water tank arranged along its width direction. The four fixing frames are arranged in sequence from top to bottom. A plug rod corresponding to the end of the RO reverse osmosis membrane module is slidably connected to the fixing frame. A plug ball for blocking the end of the RO reverse osmosis membrane module is installed at the end of the plug rod. An elastic reset member is installed between the plug rod and the fixing frame. A ball is rotatably connected to the end of the plug rod away from the plug ball. A screw rod and a rotating cylinder are rotatably connected in the water tank. The rotating cylinder is rotatably sleeved on the screw rod. A limiting guide groove is formed on the side wall of the rotating cylinder. A single-acting blocking group that moves up and down along the limiting guide groove when the screw rod rotates is installed on the screw rod. When the single-acting blocking group moves, it pushes the plug rod in contact with it to drive the corresponding plug ball to block the corresponding port of the RO reverse osmosis membrane module.

[0009] A multi-stage adjustment group is installed on the outer wall of the rotating cylinder. When the rotating cylinder rotates, the multi-stage adjustment group closes the port of the RO reverse osmosis membrane module by pushing the corresponding plug ball.

[0010] In a possible implementation manner, the elastic reset member comprises a fixing ring fixedly sleeved on the plug rod. A reset spring sleeved on the plug rod is installed between the fixing ring and the fixing frame, and a contraction cylinder is further installed between the fixing ring and the fixing frame. The reset spring is located inside the contraction cylinder.

[0011] An insertion lock mechanism for locking a plugging ball that closes the port of the RO reverse osmosis membrane module is also installed in the water tank. The insertion lock mechanism includes multiple groups of insertion lock groups and multiple groups of sealing and wrapping groups. The sealing and wrapping groups correspond to the insertion lock groups one by one, and the corresponding sealing and wrapping groups and insertion lock groups form a locking and sealing unit. The locking and sealing units correspond to the plugging balls one by one. The insertion lock groups are used to insert and lock the plugging balls, and the sealing and wrapping groups are used to wrap and seal the pressing area between the plugging balls and the ports of the RO reverse osmosis membrane module. A locking drive group for driving multiple groups of insertion lock groups and multiple groups of sealing and wrapping groups is also installed on the water tank.

[0012] In a possible implementation manner, the single-pressure plugging group includes a connecting ring that slides up and down inside a rotating cylinder. The connecting ring is sleeved on a screw rod and is connected to the screw rod by means of a threaded fit. A connecting block that slides along its circumference is installed on the outer wall of the connecting ring. The connecting block passes through a limiting guide groove and then installs a trapezoidal pressing plate. Both the upper and lower end faces of the trapezoidal pressing plate are inclined surfaces, and the two inclined surfaces are in a shape of an eight-character with the small-mouth end facing the insertion rod.

[0013] In a possible implementation manner, a slider that is slidably connected to the inner wall of the rotating cylinder is fixedly connected to the upper end of the outer ring wall of the connecting ring, and the connecting block is located below the slider.

[0014] In a possible implementation manner, an observation port is opened on one of the two side walls of the water tank arranged along its width direction. A transparent panel is installed on the observation port. An indicating needle that slidably abuts against the transparent panel is installed on the side wall of the trapezoidal pressing plate. An indicating line corresponding to the axis of the insertion rod is also provided on the side wall of the water tank.

[0015] In a possible implementation manner, the multi-stage adjustment group includes a secondary closing component, a tertiary closing component, and a full closing component installed on the outer wall of the rotating cylinder. The secondary closing component, the tertiary closing component, the full closing component, and the limiting guide groove are evenly arranged along the circumference of the rotating cylinder. The secondary closing component consists of two arc-shaped wedges; the tertiary closing component consists of three arc-shaped wedges, and the full closing component consists of four arc-shaped wedges. The arc-shaped wedges in the secondary closing component, the tertiary closing component, and the full closing component are aligned with the corresponding insertion rods in sequence from top to bottom.

[0016] In a possible implementation manner, the insertion lock group includes connecting rods symmetrically arranged along the width direction of the water tank. Pressing blocks are installed at the opposite ends of the two connecting rods. Plugging grooves are provided on the side wall of the plugging ball. An inclined surface is provided on one side of the pressing block close to the port of the RO reverse osmosis membrane module, and an inclined surface that cooperates with the inclined surface of the pressing block is provided on the inner wall of the plugging groove.

[0017] In a possible implementation manner, the sealing and wrapping group includes mounting strips symmetrically arranged along the width direction of the water tank. Half-ring clamping plates are installed on the opposite faces of the two mounting strips, and sealing sheets are installed on the inner ring surfaces of the half-ring clamping plates.

[0018] In a possible implementation manner, the locking drive group includes a gear rotatably connected to both the inner wall of the top and the inner wall of the bottom of the water tank. A connecting strip is jointly installed at one end of the plurality of mounting strips arranged from top to bottom on the same side and the connecting rod away from the plugging ball. The connecting strip is slidably connected to the water tank. Rack teeth meshing with the gear are installed on the opposite surfaces of the two connecting strips. A locking rotating rod is rotatably connected to the side wall of the water tank, and the locking rotating rod is connected to one of the connecting strips in a threaded fit manner.

[0019] In a possible implementation manner, a plurality of gear position indicating strips arranged circumferentially and uniformly are installed on the top of the rotating cylinder after it rotatably penetrates through the water tank. The plurality of gear position indicating strips respectively correspond to the secondary closing assembly, the tertiary closing assembly, the full closing assembly, and the limiting guide groove. An alignment line parallel to the axis of the insertion rod is also installed on the top of the water tank.

[0020] One or more of the above technical solutions in the embodiments of the present invention have at least one of the following beneficial effects:

[0021] 1. By the cooperation of the screw rod, the rotating cylinder, the single-pressure plugging group, and the multi-stage adjustment group, the present invention can not only separately control the closing of the ports at both ends of each RO reverse osmosis membrane module, but also control the closing of the ports at both ends of two or three RO reverse osmosis membrane modules according to the change of requirements, so that the wastewater can be continuously treated, improving the efficiency of wastewater treatment and the operation flexibility of the wastewater treatment device during the cleaning of the RO reverse osmosis membrane module. When the treatment device is not in use, the multi-stage adjustment group can also simultaneously close the ports at both ends of the four RO reverse osmosis membrane modules, thereby improving the convenience of double-end closing and then cleaning of the RO reverse osmosis membrane module, as well as improving the flexibility and versatility of the overall treatment device for adjusting and using according to the flow rate of coal tar wastewater.

[0022] 2. In the plugging and locking mechanism of the present invention, the plugging and locking group in the plugging and locking mechanism secondarily presses and compresses the plugging ball against the port of the RO reverse osmosis membrane module, and at the same time, the sealing and coating group coats and seals the pressing position between the plugging ball and the port of the RO reverse osmosis membrane module, thereby improving the pressing tightness between the plugging ball and the port of the RO reverse osmosis membrane module and the stability of the plugging position of the plugging ball, and preventing the plugging ball from shaking under the impact force of the coal tar wastewater, affecting the sealing performance and cleaning effect during the cleaning of the RO reverse osmosis membrane module.

[0023] 3. The operation of separately controlling the closing of the ports at both ends of each RO reverse osmosis membrane module and the operation of controlling the closing of the ports at both ends of two or more RO reverse osmosis membrane modules in the present invention do not affect each other under the combined action of the single-pressure plugging group and the rotating cylinder, thereby improving the convenience of the operation of double-end plugging and then cleaning of the RO reverse osmosis membrane module. Description of the Drawings

[0024] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only the embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to the provided drawings.

[0025] Figure 1 is the first overall three-dimensional structural schematic diagram of the present invention.

[0026] Figure 2 is the second overall three-dimensional structural schematic diagram of the present invention.

[0027] Figure 3 is the three-dimensional structural schematic diagram of the cooperation between the opening and closing adjustment mechanism and the plug lock mechanism of the present invention.

[0028] Figure 4 is the three-dimensional structural schematic diagram of the plug lock mechanism of the present invention.

[0029] Figure 5 is the three-dimensional structural schematic diagram of the opening and closing adjustment mechanism of the present invention.

[0030] Figure 6 is the structural schematic diagram of the single-resistance plugging group of the present invention.

[0031] Figure 7 is the top view cross-sectional view of the plug lock group and the elastic reset member of the present invention.

[0032] Figure 8 is the structural schematic diagram of the first linkage component and the second linkage component of the present invention.

[0033] Reference numerals:

[0034] 1. RO reverse osmosis membrane module; 10. Backwash drain port; 11. Backwash inlet port; 12. Waste liquid discharge port; 2. Water tank; 20. Observation port; 21. Indicator needle; 22. Indicator line; 3. Opening and closing adjustment mechanism; 30. Fixed bracket; 31. Insert rod; 32. Plugging ball; 33. Elastic reset member; 330. Fixed ring; 331. Shrinkage cylinder; 332. Reset spring; 34. Rotating cylinder; 340. Gear position indicator bar; 341. Alignment line; 35. Screw rod; 36. Limit guide groove; 37. Single-stop plugging group; 370. Connecting ring; 371. Connecting block; 372. Trapezoidal pressing plate; 390. Slide block; 38. Multi-stage adjustment group; 380. Second-stage closing assembly; 381. Third-stage closing assembly; 382. Full-closed assembly; 4. Insert lock mechanism; 41. Insert lock group; 410. Connecting rod; 411. Pressing block; 412. Inserting and pressing groove; 42. Sealing and coating group; 420. Installation strip; 421. Half-ring clamping plate; 43. Locking drive group; 430. Gear; 431. Connecting strip; 432. Rack; 433. Locking rotating rod. Detailed implementation manners

[0035] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0036] In order to enable those in the technical field to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0037] Refer to Figure 1 And Figure 2 A coal tar deep processing wastewater treatment device includes: four RO reverse osmosis membrane modules 1 arranged in sequence from top to bottom. The RO reverse osmosis membrane module 1 is provided with a backwash drain port 10, a backwash inlet port 11 and a waste liquid discharge port 12. One end of the RO reverse osmosis membrane module 1 is a purified water discharge port, and the other end is a wastewater inlet. A backwash drain port 10 is installed on the side wall of the RO reverse osmosis membrane module 1 near the purified water discharge port thereof, a backwash inlet port 11 is installed on the side wall of the RO reverse osmosis membrane module 1 near the wastewater inlet thereof, and a waste liquid discharge port 12 is also installed on the side wall of the RO reverse osmosis membrane module 1 near the backwash inlet port 11.

[0038] Refer to Figure 1 And Figure 2, the tar deep processing wastewater treatment device further includes two water tanks 2. Both ends of the RO reverse osmosis membrane module 1 are communicated with the two water tanks 2 respectively. An opening and closing adjustment mechanism 3 is installed on the water tank 2. The two opening and closing adjustment mechanisms 3 have the same structure and are symmetrically arranged along the axial direction of the RO reverse osmosis membrane module 1.

[0039] A water inlet pipe is installed on the side wall of the water tank 2 connected to the wastewater inlet of the RO reverse osmosis membrane module 1. The other end of the water inlet pipe is connected to the coal tar wastewater discharge device. A drain pipe is installed on the side wall of the water tank 2 connected to the purified water discharge port of the RO reverse osmosis membrane module 1; valves are installed on the backwash drain port 10, the backwash water inlet 11, and the waste liquid discharge port 12, and the backwash water inlet 11 is connected to the backwash water pump (the coal tar wastewater discharge device, the valve, and the backwash water pump are all existing devices and are not shown in the figure).

[0040] Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 And Figure 8 , the opening and closing adjustment mechanism 3 includes four fixing frames 30 installed between two inner walls of the water tank 2 arranged along its width direction. The four fixing frames 30 are arranged in sequence from top to bottom. A plug rod 31 corresponding to the end of the RO reverse osmosis membrane module 1 is slidably connected to the fixing frame 30. A plugging ball 32 for plugging the end of the RO reverse osmosis membrane module 1 is installed at the end of the plug rod 31. A sealing sleeve (not shown in the figure) is sleeved on the outer wall of the plugging ball 32. An elastic reset member 33 is installed between the plug rod 31 and the fixing frame 30. A ball is rotatably connected to one end of the plug rod 31 away from the plugging ball 32. A screw rod 35 and a rotating cylinder 34 are rotatably connected in the water tank 2. The rotating cylinder 34 is rotatably sleeved on the screw rod 35. A limiting guide groove 36 is opened on the side wall of the rotating cylinder 34. A single-acting plugging group 37 that moves up and down along the limiting guide groove 36 when the screw rod 35 rotates is installed on the screw rod 35. When the single-acting plugging group 37 moves, it pushes the plug rod 31 in contact with it to drive the corresponding plugging ball 32 to plug the corresponding port of the RO reverse osmosis membrane module 1. A multi-stage adjustment group 38 is installed on the outer wall of the rotating cylinder 34. When the rotating cylinder 34 rotates, the multi-stage adjustment group 38 closes the port of the RO reverse osmosis membrane module 1 by pushing the corresponding plugging ball 32.

[0041] A seal is installed between the rotating cylinder 34 and the water tank 2 after the rotating cylinder 34 passes through the water tank 2, and a seal is also installed between the rotating cylinder 34 and the screw 35 (the seal is an existing part), so as to prevent the water in the water tank 2 from overflowing the water tank 2 along the rotating cylinder 34 or the screw 35. The lower ends of the two rotating cylinders 34 pass through the water tank 2 and can be connected by a first linkage assembly, so as to rotate synchronously in opposite directions. Among them, the first linkage assembly includes a first rotating shaft rotatably installed at the bottom of one of the water tanks 2. The first rotating shaft and the adjacent rotating cylinder 34 are meshed and driven by a first reversing gear set. The first rotating shaft and the other rotating cylinder 34 are connected by a sprocket chain mechanism (as Figure 8 shown); the lower ends of the two screws 35 pass through the water tank 2 and can be connected by a second linkage assembly, so as to rotate synchronously in opposite directions. Among them, the second linkage assembly includes a second rotating shaft rotatably installed at the bottom of one of the water tanks 2. The second rotating shaft and the adjacent screw 35 are meshed and driven by a second reversing gear set. The second rotating shaft and the other screw 35 are connected by a sprocket chain mechanism, (as Figure 8 shown). One of the screws 35 is controlled by an external driving source one (such as manual), and one of the rotating cylinders 34 is controlled by an external driving source two (such as manual). An external locking member for locking the rotating cylinder 34 and the screw 35 respectively after rotation is installed at the top of the water tank 2. The locking member consists of a bolt and a convex block. The convex block is installed at the upper ends of the rotating cylinder 34 and the screw 35, and the convex block is fixed to the top of the water tank 2 by the bolt (the bolt and the convex block are not shown in the figure), so as to limit and lock the rotating cylinder 34 and the screw 35 and prevent them from rotating randomly.

[0042] In the initial state, the single-contact plugging group 37 is located above the uppermost insertion rod 31. During use, when it is necessary to clean the four RO reverse osmosis membrane modules 1 arranged from top to bottom in sequence, the external driving source one drives the screw 35 to rotate. The two screws 35 rotate in opposite directions simultaneously under the connection action of the second linkage assembly between them. During the rotation of the screw 35, the single-contact plugging group 37 presses the ball at the end of the insertion rod 31 in contact with it, so as to push the insertion rod 31 to drive the plugging ball 32 to move towards the port of the RO reverse osmosis membrane module 1. At this time, the elastic reset member 33 contracts until the two plugging balls 32 respectively block the two ends of the RO reverse osmosis membrane module 1, so as to realize the blocking of the two ends of a single RO reverse osmosis membrane module 1, that is, the blocking of the purified water drain port and the waste water inlet, greatly improving the convenience of blocking the two ends of the RO reverse osmosis membrane module 1. Then, the backwashing drain port 10 and the backwashing water inlet 11 on the RO reverse osmosis membrane module 1 are opened, so as to carry out backwashing and cleaning.

[0043] After the cleaning of the blocked RO reverse osmosis membrane module 1 is completed, the above steps are repeated to continue cleaning the next RO reverse osmosis membrane module 1, realizing the integrated driving operation of port plugging for multiple RO reverse osmosis membrane modules 1, which greatly improves the convenience and efficiency of first double-end plugging and then cleaning of the RO reverse osmosis membrane module 1.

[0044] When the amount of coal tar wastewater to be treated is small or when multiple RO reverse osmosis membrane modules 1 need to be cleaned at one time, the rotating cylinder 34 can also be driven to rotate, so that the rotating cylinder 34 drives the multi-stage adjustment group 38 installed on its outer wall to rotate at a corresponding angle, thereby pressing and plugging the two ends of two or three RO reverse osmosis membrane modules 1 at one time; when the processing device is not in use, the multi-stage adjustment group 38 can also close the two ends of the four RO reverse osmosis membrane modules 1 at the same time. The cooperation between the multi-stage adjustment group 38 and the single plugging group 37 improves the convenience of first double-end plugging and then cleaning of the RO reverse osmosis membrane module 1, as well as the flexibility and versatility of the overall processing device to adjust the use according to the flow rate of coal tar wastewater.

[0045] Refer to Figure 3 、 Figure 4 And Figure 7 As shown in, the elastic reset member 33 includes a fixing ring 330 fixedly sleeved on the insertion rod 31. A reset spring 332 sleeved on the insertion rod 31 is installed between the fixing ring 330 and the fixing frame 30, and a contraction cylinder 331 is also installed between the fixing ring 330 and the fixing frame 30. The reset spring 332 is located inside the contraction cylinder 331, and the contraction cylinder 331 wraps the reset spring 332 inside it to prevent impurities in the wastewater from affecting the contraction of the reset spring 332.

[0046] Refer to Figure 1 、 Figure 3 、 Figure 4 And Figure 7 As shown in, an insertion lock mechanism 4 for locking the plugging ball 32 that closes the port of the RO reverse osmosis membrane module 1 is further installed in the water tank 2. The insertion lock mechanism 4 includes multiple groups of insertion lock groups 41 and multiple groups of sealing and wrapping groups 42. The sealing and wrapping groups 42 correspond to the insertion lock groups 41 one by one, and the corresponding sealing and wrapping groups 42 and insertion lock groups 41 form a locking and sealing unit. The locking and sealing units correspond to the plugging balls 32 one by one. The insertion lock groups 41 are used to insert and lock the plugging balls 32, and the sealing and wrapping groups 42 are used to wrap and seal the pressing places between the plugging balls 32 and the ports of the RO reverse osmosis membrane module 1. A locking drive group 43 for driving multiple groups of insertion lock groups 41 and multiple groups of sealing and wrapping groups 42 is also installed on the water tank 2.

[0047] When both ends of the RO reverse osmosis membrane assembly 1 are blocked, the locking drive group 43 drives the plug-in lock group 41 to move toward the blocking ball 32 until the blocking ball 32 pressed against the port of the RO reverse osmosis membrane assembly 1 and the corresponding plug-in lock group 41 are pressed and plugged, thereby pressing the blocking ball 32 against the port of the RO reverse osmosis membrane assembly 1 for a second time, thereby improving the sealing performance of the blocking ball 32 against the port of the RO reverse osmosis membrane assembly 1 and the stability of the blocking ball 32, preventing the blocking ball 32 from shaking under the impact force of coal tar wastewater and affecting the sealing performance of the RO reverse osmosis membrane assembly 1 during cleaning. At the same time, the locking drive group 43 also drives the sealing coating group 42 to coat and seal the blocking ball 32 pressed against the port of the RO reverse osmosis membrane assembly 1 and the port of the RO reverse osmosis membrane assembly 1, thereby further improving the sealing performance of the RO reverse osmosis membrane assembly 1 during cleaning.

[0048] See also Figure 3 , Figure 5 , Figure 6 and Figure 7 The single-resistance sealing group 37 includes a connecting ring 370 that is slidably connected up and down in the rotating cylinder 34. The connecting ring 370 is sleeved on the screw 35 and is connected to the screw 35 by threaded cooperation. The outer wall of the connecting ring 370 is equipped with a connecting block 371 that slides along its circumference. The connecting block 371 passes through the limiting guide groove 36 and is equipped with a trapezoidal resist plate 372. The upper and lower end surfaces of the trapezoidal resist plate 372 are both inclined surfaces, and the two inclined surfaces are in an eight-shaped shape with the small end facing the insertion rod 31.

[0049] Under the limitation of the limiting guide groove 36, during the rotation of the screw rod 35, the connecting ring 370 and the connecting block 371 are driven to move along the axial direction of the rotating cylinder 34 by means of threaded cooperation, and the connecting ring 370 drives the trapezoidal abutment plate 372 to move. When the inclined surface of the trapezoidal abutment plate 372 contacts the ball at the end of one of the corresponding insertion rods 31, the trapezoidal abutment plate 372 pushes the insertion rod 31 to drive the blocking ball 32 to block the corresponding RO reverse osmosis membrane assembly 1 port, thereby realizing the function of a single abutment blocking group 37 moving downward to intermittently block the ports of the four RO reverse osmosis membrane assemblies 1 in sequence, thereby improving the convenience of performing a single blocking operation on the ports of the four RO reverse osmosis membrane assemblies 1 each time.

[0050] See also Figure 5 and Figure 6 A slider 390 that is slidably connected to the inner wall of the rotating cylinder 34 is fixedly connected to the upper end of the outer ring wall of the connecting ring 370, and the connecting block 371 is located below the slider 390. The connecting block 371 and the slider 390 are staggered up and down, so that when the rotating cylinder 34 rotates, the connecting block 371 can be driven to rotate circumferentially along the connecting ring 370, avoiding mutual obstruction between the slider 390 and the connecting block 371 when the rotating cylinder 34 rotates, which affects the circumferential rotation of the connecting block 371 along the connecting ring 370.

[0051] Refer to Figure 1 、 Figure 2 and Figure 7 As shown in Figure 1 , Figure 2 and Figure 7 , one side wall of the two sides arranged along the width direction of the water tank 2 is provided with an observation port 20. A transparent panel is installed on the observation port 20. An indicating needle 21 that slidably abuts against the transparent panel is installed on the side wall of the trapezoidal abutting plate 372. An indicating line 22 corresponding to the axis of the insertion rod 31 one by one is also provided on the side wall of the water tank 2.

[0052] During the up and down movement of the trapezoidal abutting plate 372, the indicating needle 21 is driven to move. When the indicating needle 21 aligns with one of the indicating lines 22, it means that the trapezoidal abutting plate 372 pushes the insertion rod 31 corresponding to the indicating line 22 and the plugging ball 32 to block the port of the corresponding RO reverse osmosis membrane module 1, so as to facilitate the operator to observe and determine that at this time, the trapezoidal abutting plate 372 pushes the insertion rod 31 and the plugging ball 32 to effectively block the port of a single RO reverse osmosis membrane module 1.

[0053] Refer to Figure 3 and Figure 5 As shown in Figure 3 and Figure 5 , the multi-stage adjustment group 38 includes a secondary closing component 380, a tertiary closing component 381 and a full closing component 382 installed on the outer wall of the rotating cylinder 34. The secondary closing component 380, the tertiary closing component 381, the full closing component 382 and the limit guide groove 36 are evenly arranged along the circumferential direction of the rotating cylinder 34. The secondary closing component 380 is composed of two arc-shaped wedges, the tertiary closing component 381 is composed of three arc-shaped wedges, and the full closing component 382 is composed of four arc-shaped wedges. The arc-shaped wedges in the secondary closing component 380, the tertiary closing component 381 and the full closing component 382 are sequentially aligned with the corresponding insertion rods 31 from top to bottom.

[0054] When the amount of coal tar wastewater to be treated is small, the rotating cylinder 34 is driven to rotate. The rotating cylinder 34 drives the secondary closing component 380, the tertiary closing component 381 and the full closing component 382 to rotate. When the two arc-shaped wedges in the secondary closing component 380 abut against the two upper insertion rods 31, the two upper insertion rods 31 drive the plugging balls 32 connected thereto to block the ports of the two upper RO reverse osmosis membrane modules 1; when the three arc-shaped wedges in the tertiary closing component 381 abut against the three upper insertion rods 31, the three upper insertion rods 31 drive the plugging balls 32 connected thereto to block the ports of the three upper RO reverse osmosis membrane modules 1; through the cooperation of the multi-stage adjustment group 38 and the single-abutment plugging group 37, the functions of plugging a single RO reverse osmosis membrane module 1, plugging two RO reverse osmosis membrane modules 1 at the same time, and plugging three RO reverse osmosis membrane modules 1 at the same time are realized, greatly improving the flexibility of the use of the wastewater treatment device. After the two ends of the RO reverse osmosis membrane module 1 are blocked, backwashing treatment can be carried out.

[0055] When the wastewater treatment device is not in use, the rotating cylinder 34 can drive the fully closed component 382 to push against the four insertion rods 31 to completely block the ports of the four RO reverse osmosis membrane modules 1.

[0056] Refer to Figure 3 、 Figure 4 and Figure 7 , the plug lock group 41 includes connecting rods 410 symmetrically arranged along the width direction of the water tank 2. At the opposite ends of the two connecting rods 410, pressing blocks 411 are installed. Insertion grooves 412 are provided on the side walls of the plugging balls 32 corresponding to the positions of the pressing blocks 411. On the side of the pressing block 411 close to the port of the RO reverse osmosis membrane module 1, an inclined surface is provided, and the inner wall of the insertion groove 412 is provided with an inclined surface that cooperates with the inclined surface of the pressing block 411.

[0057] Refer to Figure 3 、 Figure 4 and Figure 7 , the sealing and coating group 42 includes mounting strips 420 symmetrically arranged along the width direction of the water tank 2. On the opposite surfaces of the two mounting strips 420, semi-circular clamping plates 421 are installed, and sealing sheets are installed on the inner ring surfaces of the semi-circular clamping plates 421.

[0058] Refer to Figure 1 、 Figure 3 、 Figure 4 and Figure 7 , the locking drive group 43 includes a gear 430 rotatably connected to both the inner wall of the top and the inner wall of the bottom of the water tank 2. A plurality of mounting strips 420 and the ends of the connecting rods 410 far from the plugging balls 32 arranged side by side from top to bottom together install a connecting strip 431. The connecting strip 431 is slidably connected to the water tank 2. On the opposite surfaces of the two connecting strips 431, racks 432 meshing with the gear 430 are installed. A locking rotating rod 433 is rotatably connected to the side wall of the water tank 2, and the locking rotating rod 433 is connected to one of the connecting strips 431 in a threaded fit manner.

[0059] Two locking rotating rods 433 rotate through the water tank 2 and are connected by a sprocket and chain drive (not shown in the figure). During the rotation of the locking rotating rod 433, through the threaded fit between the connecting bars 431 connected thereto, the connecting bar 431 is driven to move horizontally towards the plug rod 31. The connecting bars 431 on both sides of the plug rod 31 move towards the plug rod 31 simultaneously under the meshing drive of the gear 430 and the rack 432. The connecting bar 431 drives the pressing block 411 and the half-ring clamping plate 421 to move towards the plugging ball 32 through the connecting rod 410 and the mounting bar 420 until the pressing block 411 squeezes the plugging ball 32 and inserts it into the plugging groove 412 aligned therewith, so as to further tightly press the plugging ball 32 abutted against the port of the RO reverse osmosis membrane module 1 and the port of the RO reverse osmosis membrane module 1. At the same time, the corresponding two half-ring clamping plates 421 wrap and seal between the plugging ball 32 pressed against the port of the RO reverse osmosis membrane module 1 and the port of the RO reverse osmosis membrane module 1, further improving the sealing performance during the cleaning of the RO reverse osmosis membrane module 1; wherein, the shape of the pressing surface of the half-ring clamping plate 421 is adapted to the shape of the pressed position between the plugging ball 32 and the port of the RO reverse osmosis membrane module 1 in the tightly pressed state.

[0060] Refer to Figure 1 , Figure 2 and Figure 5 , a gear position indicating strip 340 arranged circumferentially and uniformly is installed on the top of the rotating cylinder 34 after rotating through the water tank 2. The plurality of gear position indicating strips 340 respectively correspond to the secondary closing assembly 380, the tertiary closing assembly 381, the full closing assembly 382 and the limit guide groove 36. An alignment line 341 parallel and aligned with the axis of the plug rod 31 is also installed on the top of the water tank 2. By matching the alignment line 341 with the gear position indicating strip 340, the situation when plugging the RO reverse osmosis membrane module 1 can be intuitively viewed. For example, when the alignment line 341 is adjacent and aligned with the gear position indicating strip 340 corresponding to the secondary closing assembly 380, it means that the two arc-shaped wedges in the secondary closing assembly 380 are in contact with the two upper plug rods 31, and the plugging balls 32 connected to the two upper plug rods 31 plug the two upper ports of the RO reverse osmosis membrane module 1.

[0061] Refer to Figures 1 - 8, During specific operation, when performing plugging and cleaning on the RO reverse osmosis membrane module 1 alone, the external driving source 1 drives the screw rod 35 to rotate. The two screw rods 35 rotate in opposite directions simultaneously under the connection of the linkage component 2 therebetween. During the rotation of the screw rod 35, the single-rod plugging group 37 presses against the ball at the end of the insertion rod 31 in contact with it, thereby pushing the insertion rod 31 to drive the plugging ball 32 to move towards the port of the RO reverse osmosis membrane module 1. At this time, the elastic resetting member 33 contracts until the two plugging balls 32 respectively block the two ends of the RO reverse osmosis membrane module 1, thereby achieving the plugging of the two ends of a single RO reverse osmosis membrane module 1. Then, the backwash drain port 10 and the backwash water inlet 11 on the RO reverse osmosis membrane module 1 are opened for backwash cleaning. After the cleaning of the plugged RO reverse osmosis membrane module 1 is completed, the above steps are repeated to continue cleaning the next RO reverse osmosis membrane module 1.

[0062] When the amount of coal tar wastewater to be treated is small or when multiple RO reverse osmosis membrane modules 1 need to be cleaned at one time, by driving the rotating cylinder 34 to rotate, the rotating cylinder 34 drives the multi-stage adjustment group 38 installed on its outer wall to rotate by a corresponding angle, so as to press and block the two ends of two or three RO reverse osmosis membrane modules 1 at one time. When the processing device is not in use, the multi-stage adjustment group 38 can simultaneously close the two ends of the four RO reverse osmosis membrane modules 1, and then perform backwash cleaning on the four RO reverse osmosis membrane modules 1 at the same time.

[0063] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present invention.

[0064] In the description of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "connected", "installed", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0065] The embodiments of the present specific implementation manners are all preferred embodiments of the present invention, and do not limit the protection scope of the present invention accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of the present invention should be covered within the protection scope of the present invention.

Claims

1. A device for treating wastewater from coal tar deep processing, comprising: Four RO reverse osmosis membrane modules arranged successively from top to bottom, with a backwash drain port, a backwash inlet port and a waste liquid discharge port provided on the RO reverse osmosis membrane module, characterized in that; Two water tanks, both ends of the RO reverse osmosis membrane module are respectively communicated with the two water tanks, and an opening and closing adjustment mechanism is installed on the water tanks. The two opening and closing adjustment mechanisms have the same structure and are symmetrically arranged along the axial direction of the RO reverse osmosis membrane module; The opening and closing adjustment mechanism includes four fixing frames installed between two inner walls of the water tank arranged along its width direction. The four fixing frames are arranged successively from top to bottom. A plug rod corresponding to the end of the RO reverse osmosis membrane module is slidably connected to the fixing frame. A plugging ball for plugging the end of the RO reverse osmosis membrane module is installed at the end of the plug rod. An elastic reset member is installed between the plug rod and the fixing frame. A screw rod and a rotating cylinder are rotatably connected in the water tank. The rotating cylinder is rotatably sleeved on the screw rod. A limiting guide groove is provided on the side wall of the rotating cylinder. A single-acting plugging group that moves up and down along the limiting guide groove when the screw rod rotates is installed on the screw rod. When the single-acting plugging group moves, it pushes the plug rod in contact with it to drive the corresponding plugging ball to plug the corresponding port of the RO reverse osmosis membrane module; A multi-stage adjustment group is installed on the outer wall of the rotating cylinder. When the rotating cylinder rotates, the multi-stage adjustment group closes the port of the RO reverse osmosis membrane module by pushing the corresponding plugging ball. The multi-stage adjustment group and the single-acting plugging group cooperate to control the number of RO reverse osmosis membrane modules with both ends synchronously plugged; An insertion lock mechanism for locking the plugging ball after the port is closed is also installed in the water tank. The insertion lock mechanism is also used for covering and sealing the pressing place between the plugging ball and the port of the RO reverse osmosis membrane module; The single-acting plugging group includes a connecting ring that slides up and down in the rotating cylinder. The connecting ring is sleeved on the screw rod and is connected to the screw rod by means of a threaded fit. A connecting block that slides along its circumference is installed on the outer wall of the connecting ring. The connecting block penetrates through the limiting guide groove and then installs a trapezoidal pressing plate. Both the upper and lower end faces of the trapezoidal pressing plate are inclined surfaces, and the two inclined surfaces are in an inverted V shape with the small-mouth end facing the plug rod; The multi-stage adjustment group includes a secondary closing component, a tertiary closing component and a full closing component installed on the outer wall of the rotating cylinder. The secondary closing component, the tertiary closing component, the full closing component and the limiting guide groove are evenly arranged along the circumference of the rotating cylinder. The secondary closing component consists of two arc-shaped wedges; the tertiary closing component consists of three arc-shaped wedges, and the full closing component consists of four arc-shaped wedges. The arc-shaped wedges in the secondary closing component, the tertiary closing component and the full closing component are successively aligned with the corresponding plug rods from top to bottom; The insertion lock mechanism includes multiple groups of insertion lock groups and multiple groups of sealing and covering groups. The insertion lock groups are used to insert and lock the plugging balls, and the sealing and covering groups are used to cover and seal the pressing place between the plugging balls and the ports of the RO reverse osmosis membrane modules; The insertion lock group includes connecting rods symmetrically arranged along the width direction of the water tank. Pressure blocks are installed at the opposite ends of the two connecting rods. Plugging grooves are provided on the side wall of the plugging ball. An inclined surface is provided on the side of the pressure block close to the port of the RO reverse osmosis membrane module. An inclined surface matching the inclined surface of the pressure block is provided on the inner wall of the plugging groove; The sealed coating groups correspond one-to-one with the plug locks groups, and the corresponding sealed coating groups and plug locks groups form a locking and sealing unit. The locking and sealing units correspond one-to-one with the plugging balls. The sealed coating group includes mounting bars symmetrically arranged along the width direction of the water tank. Semi-circular clamping plates are mounted on the opposite surfaces of the two mounting bars, and sealing sheets are mounted on the inner ring surfaces of the semi-circular clamping plates.

2. The coal tar deep processing wastewater treatment device according to claim 1, characterized in that: A locking drive group for driving multiple plug locks groups and multiple sealed coating groups is also mounted on the water tank; the locking drive group includes gears rotatably connected to the inner walls of the top and bottom of the water tank. A connecting bar is jointly mounted at one end of the multiple mounting bars arranged from top to bottom on the same side and the connecting rod far from the plugging ball. The connecting bar is slidably connected to the water tank. Rack bars meshing with the gears are mounted on the opposite surfaces of the two connecting bars. A locking rotating rod is rotatably connected to the side wall of the water tank, and the locking rotating rod is connected to one of the connecting bars by means of screw fit.

3. The coal tar deep processing wastewater treatment device according to claim 1, characterized in that: A gear position indicating bar arranged circumferentially and evenly is mounted on the top of the rotating cylinder after passing through the water tank in a rotating manner. The multiple gear position indicating bars respectively correspond to the secondary closing assembly, the tertiary closing assembly, the full closing assembly, and the limiting guide groove. An alignment line parallel to the axis of the insertion rod is also mounted on the top of the water tank.

4. The coal tar deep processing wastewater treatment device according to claim 1, wherein: An observation port is provided on one of the side walls of the two side walls of the water tank arranged along its width direction. A transparent panel is mounted on the observation port. An indicating needle slidingly contacting the transparent panel is mounted on the side wall of the trapezoidal abutting plate. An indicating line corresponding to the axis of the insertion rod is also provided on the side wall of the water tank.

5. The coal tar deep processing wastewater treatment device according to claim 1, wherein: The elastic reset member includes a fixing ring fixedly sleeved on the insertion rod. A reset spring sleeved on the insertion rod is mounted between the fixing ring and the fixing frame, and a contraction cylinder is also mounted between the fixing ring and the fixing frame. The reset spring is located inside the contraction cylinder.

6. The coal tar deep processing wastewater treatment device according to claim 1, characterized in that: The upper end of the outer ring wall of the connecting ring is fixedly connected with a slider slidably connected to the inner wall of the rotating cylinder. The connecting block is located below the slider.

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