Vacuum treatment device and method for sulfur-containing wastewater

Abstract

The invention relates to a sulfur-containing wastewater vacuum treatment device and method, and belongs to the technical field of wastewater treatment devices. The sulfur-containing wastewater vacuum treatment device comprises an installation platform and further comprises a pretreatment mechanism and a vacuum degassing tank which are arranged on the installation platform, the pretreatment mechanism comprises a box body and a filter sieve assembly, an impurity discharging cavity and a wastewater cavity which are arranged in a left-right adjacent mode are formed in the box body, and the filter sieve assembly is located above the wastewater cavity; the filter sieve assembly comprises a sieve frame and a plurality of blades, the sieve frame is rotationally installed on the box body, the blades are evenly distributed in an inner cavity of the sieve frame and rotationally installed on the sieve frame, eccentric shafts are connected to the ends of the blades, a push block is installed on the sieve frame in a sliding mode, a plurality of strip-shaped grooves are formed in the push block, and the eccentric shafts are inserted into the strip-shaped grooves correspondingly; an elastic piece I is connected between the push block and the screen frame, and a pushing piece is arranged on the inner wall of the box body. The filter sieve assembly is easy to clean, and the wastewater treatment efficiency can be improved.

Description

Technical Field

[0001] The invention relates to the technical field of wastewater treatment devices, and in particular to a vacuum treatment device and method for sulfur-containing wastewater. Background Art

[0002] During the gas field production process, a large amount of sulfur-containing wastewater is generated. The sources of sulfur-containing wastewater are various, such as groundwater dissolved with hydrogen sulfide and other sulfides that is extracted along with natural gas during the gas production process, and sulfur-containing wastewater formed when the water injected into the gas field during the production process mixes with formation water and returns to the ground with sulfides. These sulfur-containing wastewaters are highly toxic and polluting, and need to be strictly treated before being discharged to avoid adverse effects on the environment.

[0003] Vacuum treatment is an effective method to remove sulfides from wastewater. By reducing the pressure of the system and the solubility of the gas, the sulfur-containing gas dissolved in the liquid is allowed to escape from the wastewater. The degassed wastewater is discharged for subsequent purification treatment. The separated sulfur-containing gas is adsorbed or incinerated before being discharged or recycled.

[0004] In the prior art, a vacuum degassing tower or a vacuum degassing tank is generally used to vacuum treat sulfur-containing wastewater. Before the sulfur-containing wastewater enters the vacuum degassing tower or the vacuum degassing tank, it needs to be pretreated to remove large particle impurities and suspended matter therein. This can avoid the problem of equipment clogging during subsequent treatment and is an indispensable part of the entire vacuum degassing treatment process.

[0005] In the prior art, sewage is generally filtered through a filter screen to remove impurities such as particulate matter contained therein. For example, the patent with authorization announcement number CN215288293U discloses a graded filtration oilfield sewage softening treatment device, which includes a soft water treatment tank and a filter frame. A water inlet pipe is welded to the left side of the soft water treatment tank, a flow equalizing plate is fixedly connected to the middle part of the soft water treatment tank, a perforated plate is fixedly connected to the bottom of the flow equalizing plate, a resin is provided below the perforated plate, and a filter frame is provided below the resin. An installation groove is provided on the filter frame, and a screen, an activated carbon filter membrane, an ultrafiltration membrane, a nanofiltration membrane and a reverse osmosis membrane are connected in the installation groove. The screen cooperates with these membranes to grade and filter the insoluble small solid impurities in the sewage.

[0006] However, when the device is in use, filtered impurity particles will inevitably accumulate on the screen, which will cause the screen to be blocked. The screen needs to be removed and cleaned. The screen in the device is located in the soft water treatment tank and in the installation groove on the filter frame below the resin. The disassembly process is inconvenient. After the screen is removed, the impurities stuck in the mesh of the screen need to be cleaned manually, which is troublesome to clean. Summary of the invention

[0007] The invention provides a vacuum treatment device for sulfur-containing wastewater, so as to solve the technical problem in the prior art that when a filter screen is used to pre-treat sulfur-containing wastewater to be vacuum treated, the filter screen is easily clogged by impurity particles and is difficult to clean.

[0008] The present invention also provides a method for vacuum treatment of sulfur-containing wastewater. During the process of treating the sulfur-containing wastewater by this method, the filter screen can be automatically cleaned to remove particles stuck in the sieve holes of the filter screen, thereby improving the wastewater treatment efficiency.

[0009] In order to solve the above problems, the present invention provides a vacuum treatment device for sulfur-containing wastewater adopts the following technical solution: A vacuum treatment device for sulfur-containing wastewater, comprising a mounting platform, a pretreatment mechanism and a vacuum degassing tank arranged on the mounting platform; The pretreatment mechanism includes a box body and a filter screen assembly arranged in the box body, the box body is provided with a waste discharge chamber and a waste water chamber arranged adjacent to each other on the left and right, the vacuum degassing tank is connected with the waste water chamber, the filter screen assembly is located above the waste water chamber, the filter screen assembly includes a screen frame and a plurality of long strip-shaped blades, the end of the screen frame is rotatably mounted on the box body around a rotation axis extending forward and backward, the plurality of blades are evenly arranged in the inner cavity of the screen frame, and are rotatably mounted on the screen frame around a rotation axis parallel to the extension direction of the blades; The end of the blade is connected with an eccentric shaft parallel to the blade rotation axis. A push block is slidably installed on the screen frame along the arrangement direction of the blades. The push block is provided with a plurality of strip grooves, and each eccentric shaft is inserted into each strip groove respectively. An elastic member 1 is connected between the push block and the screen frame, and the elastic member 1 keeps the push block at a set position so that the blades are kept inclined relative to the frame surface of the screen frame; A push piece is provided on the inner wall of the box body, and the screen frame can be turned toward the impurity discharge chamber. When the screen frame is turned toward the impurity discharge chamber to a nearly horizontal state, the push piece pushes the push block to drive the blade to deflect to be perpendicular to the screen frame surface.

[0010] By adopting the above technical scheme, the filter screen assembly includes a screen frame and a plurality of blades rotatably mounted on the screen frame. The inclination angles of the blades are different, and the vertical intervals between adjacent blades are also different. The inclination angle of the blades can be adjusted by pushing the push block. When the filter screen assembly is horizontally arranged above the wastewater chamber, the plurality of blades remain in a relatively inclined state, and the vertical interval between adjacent blades is shorter. When the screen frame is flipped toward the impurity discharge chamber until the push block is pushed by the push piece, the push block drives the blades to deflect to a state perpendicular to the frame surface of the screen frame through the strip groove. At this time, the vertical interval between adjacent blades increases, and the particulate matter stuck between the adjacent blades can fall into the impurity discharge chamber.

[0011] In the process of using the device for wastewater treatment, when a large amount of impurities are accumulated on the filter screen assembly and blockage occurs, the filter screen assembly only needs to be flipped toward the impurity discharge chamber to pour the impurities on the filter screen assembly into the impurity discharge chamber. There is no need to manually remove the filter screen assembly to dump the impurities. At the same time, during the deflection of the filter screen assembly, the push block can be triggered by the push piece to deflect each blade to a state perpendicular to the frame surface of the screen frame, thereby increasing the vertical interval between two adjacent blades, so that the impurity particles stuck in the screen hole automatically fall into the impurity discharge chamber. There is no need to manually remove the impurity particles stuck between two adjacent blades, thereby realizing automatic cleaning of the filter screen assembly, making the cleaning process simpler and the cleaning efficiency of the filter screen assembly higher. Overall, it is beneficial to improve the wastewater treatment efficiency.

[0012] Furthermore, at least two groups of filter screen assemblies are arranged from top to bottom with intervals, and the interval size between two adjacent blades in each group of filter screen assemblies decreases from top to bottom.

[0013] By adopting the above technical solution, at least two groups of filter screen components are provided at intervals up and down, and the screen hole sizes decrease from top to bottom, which can improve the filtering effect on wastewater and is conducive to removing smaller impurity particles contained in the wastewater.

[0014] Furthermore, the extension directions of the blades in each of two upper and lower adjacent groups of filter screen assemblies remain vertical.

[0015] By adopting the above technical solution, since the sieve hole is formed by the space between two adjacent blades in the filter screen assembly, the sieve hole is long and strip-shaped, and the screening effect for slender impurities is poor. By keeping the blades in the two adjacent groups of filter screen assemblies vertical, the sieve hole is kept vertical, which is conducive to screening out slender impurities.

[0016] Furthermore, the front and rear side walls of the screen frame are respectively fitted with the front and rear walls of the box body. When the screen frame is horizontally arranged directly above the wastewater chamber, its right end is fitted with the right side wall of the box body. One end of the screen frame rotatably connected to the box body is vertically connected to a baffle, which is located on the side of the screen frame for facing the wastewater.

[0017] By adopting the above technical solution, when the filter screen assembly is kept in a horizontal state directly above the wastewater chamber, the front and rear side frame walls and the right side frame wall of the screen frame are respectively fitted with the corresponding box walls of the box body, ensuring that the injected wastewater can be filtered by the filter screen assembly before falling, avoiding the problem of wastewater leakage. A baffle is also connected to the screen frame, which separates the space above the drainage chamber from the space above the wastewater chamber, preventing the wastewater falling on the filter screen assembly from splashing and falling into the drainage chamber, thereby ensuring that all the injected wastewater is filtered.

[0018] Furthermore, the baffle is rotatably connected to the screen frame around a rotation axis extending forward and backward, and a vibration assembly is provided between the baffle and the screen frame. The vibration assembly includes a vibration structure 1 and a vibration structure 2. The vibration structure 1 is provided on the baffle, and the vibration structure 2 is provided on the screen frame. The baffle can rotate relative to the screen frame when the screen frame is flipped toward the impurity removal chamber to a nearly horizontal state, thereby driving the vibration structure 1 and the vibration structure 2 to move relative to each other to generate vibration.

[0019] By adopting the above technical solution, a vibration assembly is provided between the baffle and the screen frame. When the screen frame is flipped toward the impurity discharge chamber to a nearly horizontal state, the baffle rotates relative to the screen frame to drive the vibration structure 1 and the vibration structure 2 in the vibration assembly to move relative to each other, thereby vibrating the filter screen assembly. The impurities adhering to the filter screen assembly can be shaken off by the vibration, so that the filter screen assembly can be better cleaned. The baffle serves as both a blocking structure for preventing wastewater from falling into the impurity discharge chamber and a trigger structure for triggering the vibration assembly to generate vibration. It has two uses in one, and the structure is simple and ingenious. The vibration is generated by the relative rotation between the baffle and the screen frame, rather than the relative movement between the screen frame and the housing, which can relatively reduce the vibration of the housing.

[0020] Furthermore, vibration structure one is an arc-shaped friction rod with the rotation center of the baffle as the center of the circle, vibration structure two is an arc-shaped friction hole opened on the screen frame and coaxial with the arc-shaped friction rod, the arc-shaped friction rod is inserted in the arc-shaped friction hole, the outer side of the arc-shaped friction rod is provided with a plurality of elastic annular protrusions one arranged at intervals along the rod length direction of the arc-shaped friction rod, the hole wall of the arc-shaped friction hole is provided with a plurality of elastic annular protrusions two arranged at intervals along the hole length direction of the arc-shaped friction hole, and in the process of the arc-shaped friction rod sliding in the arc-shaped friction hole, the elastic annular protrusion one and the elastic annular protrusion two collide and rub against each other to generate vibration.

[0021] By adopting the above technical solution, during the relative rotation of the baffle and the screen frame, the arcuate friction rod slides in the arcuate friction hole, and the elastic annular protrusion 1 and the elastic annular protrusion 2 collide and rub against each other to generate vibration. The structure is simple and easy to arrange.

[0022] Furthermore, a torsion spring is connected between the baffle and the screen frame, and a movable stopper is provided under each group of filter screen assemblies. The movable stopper is elastically slidably installed on the box wall of the box body along the front-rear direction. The movable stopper is opposite to the impurity discharge chamber up and down. The side of the movable stopper facing the wastewater chamber is a sliding inclined surface inclined from left to right toward the outside of the box body, and the side of the movable stopper facing the impurity discharge chamber is a vertically extending stop plane.

[0023] With the above technical solution, when the filter screen assembly swings toward the impurity discharge chamber to a nearly horizontal state, the baffle contacts the stop plane in the movable block below it and is blocked by the movable block, so that the baffle can rotate relative to the screen frame and trigger vibration. When the filter screen assembly starts to swing toward the impurity discharge chamber, the baffle and the screen frame contact the push slope of the movable block above the screen frame in turn, pushing the movable block to slide toward the outside of the box and pass over the movable block, thereby preventing the movable block from affecting the swing of the filter screen assembly below it.

[0024] Furthermore, a debris discharge port connected to the bottom of the debris discharge chamber is provided on the box wall of the box body, a debris discharge auger is provided at the bottom of the debris discharge chamber, the conveying end of the debris discharge auger extends to the debris discharge port, and a collecting box is provided on the outside of the box body, and the collecting box is located below the debris discharge port.

[0025] By adopting the above technical solution, a debris removal auger is provided at the bottom of the debris removal chamber, and a collection box is provided on the outside of the box body, so as to facilitate the cleaning and collection of impurities accumulated in the debris removal chamber.

[0026] Furthermore, a shield is installed on the screen frame and covers the outside of the push block and the elastic member. The shield is provided with a strip hole extending along the sliding direction of the push block. The push block is connected with a push rod, which passes through the strip hole and extends to the outside of the shield. During the flipping process of the screen frame, the push member drives the push block to move by pushing the push rod.

[0027] By adopting the above technical solution, a protective cover is provided on the outer side of the push block and the elastic member, which can prevent the wastewater splashed during the injection process and the impurities contained therein from falling on the push block and the elastic member to affect the sliding of the push block. The push rod is connected to the push block and extends to the outer side of the protective cover. The push rod cooperates with the push member and is pushed by the push member to drive the push block to slide. The sliding of the push block is not affected by being wrapped by the protective cover.

[0028] The beneficial effect of a sulfur-containing wastewater vacuum treatment device provided by the present invention is that when a filter screen assembly is used to filter large particle impurities in the wastewater before the wastewater enters the vacuum degassing tank, if the filter screen assembly is blocked, the filter screen assembly only needs to be driven to flip toward the impurity discharge chamber to pour out the impurities accumulated on the filter screen assembly, and the vertical interval between the two adjacent blades can be increased to make the large particle impurities stuck between the two adjacent blades fall down. During this period, the filter screen assembly can also be vibrated by the vibration assembly to better remove the impurities on the filter screen assembly, thereby realizing automatic cleaning of the filter screen assembly, and the cleaning efficiency of the filter screen assembly is higher, which can improve the wastewater treatment efficiency as a whole.

[0029] The present invention also provides a method for vacuum treatment of sulfur-containing wastewater, which is achieved by using the above-mentioned sulfur-containing wastewater vacuum treatment device, and the method comprises the following steps: S1, injecting sulfur-containing wastewater into the box from above the filter screen assembly, and the wastewater flows through the filter screen assembly and falls into the wastewater cavity; S2, driving the filter screen assembly to flip toward the impurity discharge chamber, and the impurities accumulated on the filter screen assembly fall into the impurity discharge chamber. When the filter screen assembly flips to a nearly horizontal state, the push piece pushes the push block to slide, driving the blades to deflect to a frame surface perpendicular to the screen frame, and the impurities stuck between two adjacent blades are loosened and fall into the impurity discharge chamber; S3. The filtered wastewater flows from the wastewater chamber into the vacuum degassing tank for degassing treatment to remove sulfides in the sulfur-containing wastewater.

[0030] The beneficial effect of a vacuum treatment method for sulfur-containing wastewater provided by the present invention is that by using this method to treat sulfur-containing wastewater, large particle impurities contained in the wastewater can be effectively removed before the wastewater enters the vacuum degassing tank, and the filter screen assembly used to filter the wastewater can be cleaned in time, which can improve the efficiency of filtering the wastewater. Overall, the wastewater treatment efficiency can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A front view of a vacuum treatment device for sulfur-containing wastewater provided by the present invention; Figure 2 for Figure 1 A schematic diagram of the structure enlargement at the center A; Figure 3 A left view of a vacuum treatment device for sulfur-containing wastewater provided by the present invention; Figure 4 A top view of a vacuum treatment device for sulfur-containing wastewater provided by the present invention; Figure 5 A planar cross-sectional view of a pretreatment mechanism in a sulfur-containing wastewater vacuum treatment device provided by the present invention; Figure 6 A three-dimensional cross-sectional view of a pretreatment mechanism in a vacuum treatment device for sulfur-containing wastewater provided by the present invention; Figure 7 for Figure 6 A schematic diagram of the structure enlarged at B in the middle; Figure 8 A schematic structural diagram of two groups of filter screen assemblies in a vacuum treatment device for sulfur-containing wastewater provided by the present invention; Fig. 9 A schematic structural diagram of a filter screen assembly located at the top of a vacuum treatment device for sulfur-containing wastewater provided by the present invention; Fig.10 A cross-sectional view of a filter screen assembly located at the bottom of a vacuum treatment device for sulfur-containing wastewater provided by the present invention; Fig.11 for Fig.10 A schematic diagram of the structure enlarged at C in the middle; Fig.12This is a schematic diagram of the structure of blades in a sulfur-containing wastewater vacuum treatment device provided by the present invention.

[0032] Description of reference numerals: 1. Installation platform; 2. Vacuum degassing tank; 3. Box; 301. Water inlet; 302. Drain port; 303. Drain chamber; 304. Wastewater chamber; 305. Water outlet; 4. Collection box; 5. Sedimentation box; 6. Flocculant storage tank; 7. Installation plate; 8. Movable stopper; 801. Pushing inclined plane; 802. Stopping plane; 9. Guide rod; 10. Pressing plate; 11. Elastic member 2; 12. Partition plate; 121. Vertical plate section; 122. Inclined plate section; 123. Arc plate section; 13. Drain Auger; 14. Push piece 1; 15. Push piece 2; 16. Baffle; 17. Screen frame; 171. Arc friction hole; 18. Arc friction rod; 19. Blade; 20. Shield; 21. Thrust rod; 22. Push block; 221. Strip groove; 23. Elastic piece 1; 24. Eccentric shaft; 25. Elastic annular protrusion 1; 26. Elastic annular protrusion 2; 27. Articulated shaft; 28. Connecting plate; 29. ​​Conveying pipeline 1; 30. Conveying pipeline 2; 31. Conveying pipeline 3; 32. PH regulating box. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Those skilled in the art should know that the embodiments described below are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention.

[0034] The following is one embodiment of a vacuum treatment device for sulfur-containing wastewater provided by the present invention: like Figure 1-Figure 12 As shown, a vacuum treatment device for sulfur-containing wastewater includes a mounting platform 1, a pretreatment mechanism, a sedimentation box 5 and a vacuum degassing tank 2.

[0035] like Figure 1-Figure 4 As shown, the installation platform 1 is arranged on a horizontal ground, and the pretreatment mechanism, the sedimentation box 5 and the vacuum degassing tank 2 are all installed on the installation platform 1 .

[0036] like Figure 5 , Figure 6 As shown, the pretreatment mechanism includes a box body 3, a filter screen assembly, a push piece and a movable stopper 8.

[0037] The box body 3 is installed on the installation platform 1, and a partition plate 12 is provided in the inner cavity of the box body 3. The partition plate 12 includes a vertical plate segment 121, an inclined plate segment 122 and an arc plate segment 123 which are sequentially connected from top to bottom, the vertical plate segment 121 is connected between the front and rear side walls of the box body 3, the inclined plate segment 122 is inclined from top to bottom to the left, and the opening of the arc plate segment 123 faces upward and is connected to the left wall of the box body 3. The partition plate 12 divides the inner cavity of the box body 3 into a wastewater chamber 303 and a wastewater chamber 304 which are sequentially arranged from left to right.

[0038] The bottom of the impurity discharge chamber 303 is provided with an impurity discharge auger 13 extending forward and backward, and the front wall of the box body 3 is provided with an impurity discharge port 302 communicating with the bottom of the impurity discharge chamber 303, and the conveying end of the impurity discharge auger 13 extends to the impurity discharge port 302. Figure 1-Figure 4 As shown, a collecting box 4 is also installed on the mounting platform 1 , and the collecting box 4 is located on the front side of the box body 3 and below the impurity discharge port 302 . The impurity discharge auger 13 can transport the impurities at the bottom of the impurity discharge chamber 303 toward the impurity discharge port 302 , so that the impurities fall into the collecting box 4 .

[0039] like Figure 6 As shown, a water inlet 301 is provided on the right wall of the box body 3 , and the water inlet 301 is located above the wastewater chamber 304 . A water outlet 305 communicating with the wastewater chamber 304 is provided on the left wall of the box body 3 .

[0040] like Figure 5 , Figure 6 , Figure 8 As shown, two groups of filter screen assemblies are provided, and both groups of filter screen assemblies are installed in the inner cavity of the box body 3 and are located above the wastewater cavity 304, and the two groups of filter screen assemblies are spaced apart from top to bottom.

[0041] The structures of the upper and lower filter screen assemblies are basically the same. For simplicity of description, only the structure of the upper filter screen assembly is described in detail.

[0042] The filter screen assembly located at the top includes a screen frame 17, blades 19, a push block 22, an elastic member 23, a baffle 16, a shield 20 and a vibration assembly.

[0043] The sieve frame 17 is a square frame structure, and one end of the sieve frame 17 is rotatably installed on the box body 3 around a rotation axis extending forward and backward. The front and rear side walls of the sieve frame 17 are respectively fitted with the front and rear walls of the box body 3. The right side wall of the sieve frame 17 is an arc surface. When the sieve frame 17 is horizontally arranged directly above the wastewater chamber 304, the right side wall of the sieve frame 17 is fitted against the right side wall of the box body 3.

[0044] like Fig. 9As shown, there are multiple blades 19, which are long and extend in the front-rear direction. The multiple blades 19 are arranged in the inner cavity of the screen frame 17 at equal intervals along the width direction of the screen frame 17. Fig.12 As shown, the front and rear ends of the blade 19 are each connected to a hinge shaft 27 extending forward and backward, and the two hinge shafts 27 are coaxial, and the blade 19 is rotatably mounted on the screen frame 17 through the two hinge shafts 27. The front end of the blade 19 is connected to an eccentric shaft 24 extending forward and backward, and the eccentric shaft 24 is located above the hinge shaft 27 and is spaced apart from the hinge shaft 27.

[0045] like Fig. 9 As shown, the push block 22 is slidably installed on the front side of the screen frame 17 along the width direction of the screen frame 17, and a connecting plate 28 is connected to the side of the push block 22 facing away from the rotation axis of the screen frame 17, and the connecting plate 28 is connected to the push rod 21.

[0046] The push block 22 is also provided with a plurality of strip grooves 221, the number of which is equal to the number of blades 19. The plurality of strip grooves 221 extend in a direction perpendicular to the frame surface of the screen frame 17 and are evenly spaced on the push block 22 along the sliding direction of the push block 22. The eccentric shafts 24 on the blades 19 are respectively inserted into the corresponding strip grooves 221. When the push block 22 slides, the eccentric shafts 24 are pushed to move through the strip grooves 221, thereby driving the blades 19 to deflect around the hinge shaft 27.

[0047] An elastic member 23 is connected between the connecting plate 28 and the screen frame 17. The elastic member 23 is a compression spring that can be extended and retracted along the width direction of the screen frame 17. When the elastic member 23 is not subjected to external force, the position of the push block 22 enables the blade 19 to remain in a state of being inclined relative to the frame surface of the screen frame 17. At this time, the vertical interval between two adjacent blades 19 is small.

[0048] The baffle plate 16 is hinged around an axis extending forward and backward on one end of the screen frame 17 which is rotatably mounted on the box body 3 , and a torsion spring is connected between the baffle plate 16 and the screen frame 17 .

[0049] The shield 20 is installed on the screen frame 17 and wraps the push block 22 and the elastic member 23. The top of the shield 20 is provided with a strip hole extending along the sliding direction of the push block 22, and the push rod 21 extends to the outside of the shield 20 through the strip hole.

[0050] like Fig. 9 , Fig.10 , Fig.11As shown, the vibration assembly includes a vibration structure 1 and a vibration structure 2. The vibration structure 1 is an arc-shaped friction rod 18 coaxial with the rotation axis of the baffle 16. One end of the arc-shaped friction rod 18 is fixedly connected to the baffle 16, and the other end is suspended. The vibration structure 2 is an arc-shaped friction hole 171, which is opened on the screen frame 17, is coaxial with the arc-shaped friction rod 18, and the arc-shaped friction rod 18 is slidably penetrated in the arc-shaped friction hole 171.

[0051] A plurality of elastic annular protrusions 25 are provided on the outer side of the arc-shaped friction rod 18, and the plurality of elastic annular protrusions 25 are evenly spaced along the length direction of the arc-shaped friction rod 18. A plurality of elastic annular protrusions 26 are provided on the hole wall of the arc-shaped friction hole 171, and the plurality of elastic annular protrusions 26 are evenly spaced along the length direction of the arc-shaped friction hole 171.

[0052] like Figure 8 As shown, the structure of the filter screen assembly located below is basically the same as the structure of the filter screen assembly located above, and the difference lies in that the extension direction of the blade 19 in the filter screen assembly located below is perpendicular to the extension direction of the blade 19 in the filter screen assembly located above, the sliding direction of the push block 22 in the filter screen assembly located below is perpendicular to the sliding direction of the push block 22 in the filter screen assembly located above, and the telescopic direction of the elastic member 23 in the filter screen assembly located below is perpendicular to the telescopic direction of the elastic member 23 in the filter screen assembly located above.

[0053] like Figure 5 , Figure 6 As shown, there are two push members, namely push member 1 14 and push member 2 15 , which correspond to the upper and lower groups of filter screen assemblies respectively.

[0054] The push member 14 is a plate-like structure tilted from top to bottom and leftward. The push member 14 is fixedly mounted on the front wall of the box body 3 and is located at the lower left of the rotation axis of the screen frame 17 in the corresponding filter screen assembly. When the filter screen assembly located at the top is turned over toward the impurity discharge chamber 303, the push rod 21 contacts the top surface of the push member 14 and is pushed to drive the push block 22 to slide.

[0055] The second push piece 15 is a plate-like structure that tilts from top to bottom and forward. The second push piece 15 is fixedly mounted on the left wall of the box body 3. The second push piece 15 is located below the rotation axis of the screen frame 17 in the corresponding filter screen assembly. When the filter screen assembly located below turns toward the impurity discharge chamber 303, the corresponding push rod 21 contacts the top surface of the second push piece 15 and is pushed to drive the corresponding push block 22 to slide.

[0056] like Figure 5 , Figure 6As shown, there are two movable stops 8, which are spaced apart from each other and are both slidably installed on the front wall of the box body 3 to the left of the partition plate 12, and the two movable stops 8 are respectively located at the lower right side of the two push members.

[0057] like Figure 7 As shown, the left side of the movable stopper 8 is a stopper plane 802 extending vertically, and the right side of the movable stopper 8 is a sliding inclined surface 801 inclined from left to right and forward.

[0058] like Figure 1 , Figure 2 As shown, two L-shaped mounting plates 7 are connected to the outer side of the front wall of the box body 3, and the two mounting plates 7 are respectively opposite to the two movable stoppers 8. The front side of the movable stopper 8 is connected to a guide rod 9 extending forward and backward, and the guide rod 9 passes through the mounting plate 7 from the back to the front. The front end of the guide rod 9 is connected to a pressing plate 10, and an elastic member 11 is sleeved on the guide rod 9. The elastic member 11 is connected between the movable stopper 8 and the mounting plate 7, so that the movable stopper 8 can slide elastically in the front-back direction.

[0059] like Figure 1-Figure 4 As shown, the sedimentation box 5 is installed on the installation platform 1, and the sedimentation box 5 is connected to the water outlet 305 on the box body 3 through a conveying pipe 29. A flocculant storage tank 6 is installed on the conveying pipe. The wastewater in the wastewater chamber 304 that is filtered by the filter screen assembly is conveyed to the sedimentation box 5 through a conveying pipe 29. During the transportation of the wastewater in the conveying pipe 29, the flocculant storage tank 6 puts flocculant into the conveying pipe 29, and the flocculant is mixed with the flowing wastewater and finally flows into the sedimentation box 5 for precipitation.

[0060] A PH regulating box 32 is provided beside the sedimentation box 5, and the PH regulating box 32 is connected to the sedimentation box 5 through a conveying pipe 3 31, and the precipitated wastewater enters the PH regulating box 32 through the conveying pipe 3 31 for PH value adjustment.

[0061] The vacuum degassing tank 2 is installed on the installation platform 1. The vacuum degassing tank 2 includes a tank body, a filler, a vacuum system, a water distribution device, an exhaust system and other structures. The tank body is connected to the pH adjustment box 32 through a conveying pipe 2 30. The sulfur-containing wastewater enters the vacuum degassing tank 2 for degassing after the pH is adjusted in the pH adjustment box 32, so that the sulfide in the sulfur-containing wastewater is converted into gas and separated from the liquid. The vacuum degassing tank 2 is a prior art, and its structure is not described in detail here.

[0062] The present invention can filter the wastewater before the sulfur-containing wastewater enters the vacuum degassing tank 2 to remove large particle impurities in the wastewater. The present invention uses a filter screen assembly to filter the wastewater. The filter screen assembly can be flipped to timely clean the impurities accumulated on the filter screen assembly. The impurities stuck in the filter screen assembly can be loosened and fall off the filter screen assembly during the flipping of the filter screen assembly, which makes cleaning more convenient.

[0063] In this embodiment, two groups of filter screen assemblies are provided. In other embodiments, only one group of filter screen assemblies is provided. In this case, the spacing between two adjacent blades 19 in the filter screen assembly is smaller to ensure that both large and small impurities can be filtered out.

[0064] In this embodiment, the baffle 16 is rotatably connected to the screen frame 17 and a torsion spring is connected between the baffle 16 and the screen frame 17. A vibration assembly is also provided between the baffle 16 and the screen frame 17. In other embodiments, the baffle 16 is fixedly connected to the screen frame 17, and no vibration assembly is provided between the baffle 16 and the screen frame 17.

[0065] In this embodiment, vibration structure one is an arc-shaped friction rod 18 with an elastic annular protrusion 25 on the outer side, and vibration structure two is an arc-shaped friction hole 171 with an elastic annular protrusion 26 on the hole wall. In other embodiments, vibration structure one is a flat plate one vertically connected to the baffle 16, and an elastic protrusion 1 is provided on the surface of flat plate one. Vibration structure two is a flat plate two vertically connected to the screen frame 17, and an elastic protrusion 2 is provided on the surface of flat plate two. Flat plate one and flat plate two are staggered from each other in the front-to-back direction, and elastic protrusion two and elastic protrusion one are arranged opposite to each other. During the rotation of baffle 16 relative to the screen frame 17, elastic protrusion one and elastic protrusion two collide with each other to generate friction.

[0066] The present invention provides a method for vacuum treatment of sulfur-containing wastewater, which is implemented by using the above-mentioned device for vacuum treatment of sulfur-containing wastewater. The method comprises the following steps: S1. Inject sulfur-containing wastewater into the box 3 from the water inlet 301. The wastewater flows through the upper and lower filter screen assemblies in sequence and falls into the wastewater chamber 304. Impurities in the wastewater remain above the two filter screen assemblies. S2. When a large amount of impurities are accumulated on the filter screen assembly, stop injecting water, drive the filter screen assembly located above to flip toward the impurity discharge chamber 303, and the impurities accumulated on the filter screen assembly gradually fall into the impurity discharge chamber 303. When the filter screen assembly flips to a nearly horizontal state, the push member 14 contacts the push rod 21 and pushes the push rod 21 to drive the push block 22 to move in the direction away from the rotation axis of the screen frame 17. The push block 22 pushes the eccentric shaft 24 to rotate around the hinge shaft 27 through the strip groove 221, thereby driving the blade 19 to deflect to a position perpendicular to the screen frame 17. The vertical interval between two adjacent blades 19 increases on the frame surface of the frame 17, and the impurities stuck between the two adjacent blades 19 are loosened and fall into the impurity discharge chamber 303. When the blades 19 deflect, the baffle 16 is blocked by the stop plane 802 of the movable stopper 8 and deflects relative to the screen frame 17, driving the arc-shaped friction rod 18 to slide in the arc-shaped friction hole 171, and the elastic annular protrusion 1 25 and the elastic annular protrusion 2 26 rub and collide with each other to generate vibration, so as to shake off the impurities adhering to the filter screen assembly, and then drive the filter screen assembly to rotate in the reverse direction and reset; S3, driving the filter screen assembly located below to flip toward the impurity removal chamber 303, and repeating the subsequent actions in step S3 to clean the filter screen assembly located below and reset it after cleaning; S4, the filtered wastewater enters the delivery pipe 29 from the wastewater chamber 304, the flocculant storage tank 6 puts flocculant into the delivery pipe 29, the wastewater mixed with the flocculant enters the sedimentation tank 5 for sedimentation, the precipitated wastewater enters the PH adjustment tank 32 through the delivery pipe 3 31 for PH adjustment, and then enters the vacuum degassing tank 2 through the delivery pipe 2 30 for degassing treatment to remove sulfide in the sulfur-containing wastewater; S5, driving the impurity removal auger 13 to rotate, and the impurity removal auger 13 pushes the impurities in the impurity removal chamber 303 into the collection box 4 through the impurity removal port 302.

Claims

1. A vacuum treatment device for sulfur-containing wastewater, comprising a mounting platform, characterized in that: It also includes a pre-treatment mechanism and a vacuum degassing tank arranged on the mounting platform; The pretreatment mechanism includes a box body and a filter screen assembly arranged in the box body, the box body is provided with a waste discharge chamber and a waste water chamber arranged adjacent to each other on the left and right, the vacuum degassing tank is connected with the waste water chamber, the filter screen assembly is located above the waste water chamber, the filter screen assembly includes a screen frame and a plurality of long strip-shaped blades, the end of the screen frame is rotatably mounted on the box body around a rotation axis extending forward and backward, the plurality of blades are evenly arranged in the inner cavity of the screen frame, and are rotatably mounted on the screen frame around a rotation axis parallel to the extension direction of the blades; The end of the blade is connected with an eccentric shaft parallel to the blade rotation axis. A push block is slidably installed on the screen frame along the arrangement direction of the blades. The push block is provided with a plurality of strip grooves, and each eccentric shaft is inserted into each strip groove respectively. An elastic member 1 is connected between the push block and the screen frame, and the elastic member 1 keeps the push block at a set position so that the blades are kept inclined relative to the frame surface of the screen frame; A push piece is provided on the inner wall of the box body, and the screen frame can be turned toward the impurity discharge chamber. When the screen frame is turned toward the impurity discharge chamber to a nearly horizontal state, the push piece pushes the push block to drive the blade to deflect to be perpendicular to the screen frame surface.

2. A vacuum treatment device for sulfur-containing wastewater according to claim 1, characterized in that: At least two groups of filter screen components are arranged from top to bottom with intervals, and the interval size between two adjacent blades in each group of filter screen components decreases from top to bottom.

3. A vacuum treatment device for sulfur-containing wastewater according to claim 2, characterized in that: The extension directions of the blades in each of two upper and lower adjacent groups of filter screen assemblies remain vertical.

4. A vacuum treatment device for sulfur-containing wastewater according to claim 3, characterized in that: The front and rear side walls of the screen frame are respectively fitted with the front and rear walls of the box body. When the screen frame is horizontally arranged directly above the wastewater chamber, its right end is fitted with the right side wall of the box body. One end of the screen frame rotatably connected to the box body is vertically connected to a baffle, which is located on the side of the screen frame used to face the wastewater.

5. A vacuum treatment device for sulfur-containing wastewater according to claim 4, characterized in that: The baffle is connected to the screen frame by rotating around a rotating axis extending forward and backward. A vibration assembly is provided between the baffle and the screen frame. The vibration assembly includes a vibration structure 1 and a vibration structure 2. The vibration structure 1 is provided on the baffle, and the vibration structure 2 is provided on the screen frame. The baffle can rotate relative to the screen frame when the screen frame is flipped toward the impurity discharge chamber to a nearly horizontal state, thereby driving the vibration structure 1 and the vibration structure 2 to move relative to each other to generate vibration.

6. A vacuum treatment device for sulfur-containing wastewater according to claim 5, characterized in that: The vibration structure 1 is an arc-shaped friction rod with the rotation center of the baffle as the center of the circle, and the vibration structure 2 is an arc-shaped friction hole coaxial with the arc-shaped friction rod and opened on the screen frame. The arc-shaped friction rod is inserted into the arc-shaped friction hole. The outer side of the arc-shaped friction rod is provided with a plurality of elastic annular protrusions 1 arranged at intervals along the length direction of the arc-shaped friction rod, and the hole wall of the arc-shaped friction hole is provided with a plurality of elastic annular protrusions 2 arranged at intervals along the length direction of the arc-shaped friction hole. When the arc-shaped friction rod slides in the arc-shaped friction hole, the elastic annular protrusion 1 and the elastic annular protrusion 2 collide and rub against each other to generate vibration.

7. A vacuum treatment device for sulfur-containing wastewater according to claim 5 or 6, characterized in that: A torsion spring is connected between the baffle and the screen frame. A movable stopper is provided under each group of filter screen assemblies. The movable stopper is elastically slidably installed on the box wall of the box body along the front-rear direction. The movable stopper is opposite to the impurity discharge chamber up and down. The side of the movable stopper facing the wastewater chamber is a sliding inclined surface inclined from left to right toward the outside of the box body, and the side of the movable stopper facing the impurity discharge chamber is a vertically extending stop plane.

8. A vacuum treatment device for sulfur-containing wastewater according to any one of claims 1 to 6, characterized in that: A debris discharge port connected to the bottom of the debris discharge chamber is provided on the box wall of the box body, a debris discharge auger is provided at the bottom of the debris discharge chamber, the conveying end of the debris discharge auger extends to the debris discharge port, and a collecting box is provided on the outside of the box body, and the collecting box is located below the debris discharge port.

9. A vacuum treatment device for sulfur-containing wastewater according to any one of claims 1 to 6, characterized in that: A shield is installed on the screen frame and covers the outside of the push block and the elastic member. The shield is provided with a strip hole extending along the sliding direction of the push block. The push block is connected with a push rod, which passes through the strip hole and extends to the outside of the shield. During the flipping process of the screen frame, the push member drives the push block to move by pushing the push rod.

10. A method for vacuum treatment of sulfur-containing wastewater, which is implemented by using a vacuum treatment device for sulfur-containing wastewater according to any one of claims 1 to 9, the method comprising the following steps: S1. Inject sulfur-containing wastewater into the box from above the filter screen assembly, and the wastewater flows through the filter screen assembly and falls into the wastewater cavity; S2, driving the filter screen assembly to flip toward the impurity discharge chamber, and the impurities accumulated on the filter screen assembly fall into the impurity discharge chamber. When the filter screen assembly flips to a nearly horizontal state, the push piece pushes the push block to slide, driving the blades to deflect to a frame surface perpendicular to the screen frame, and the impurities stuck between two adjacent blades are loosened and fall into the impurity discharge chamber; S3. The filtered wastewater flows from the wastewater chamber into the vacuum degassing tank for degassing treatment to remove sulfides in the sulfur-containing wastewater.

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