A vacuum treatment device and method for sulfur-containing wastewater

Abstract

The present invention relates to a vacuum treatment device and method for sulfur-containing wastewater, belonging to the technical field of wastewater treatment devices. A vacuum treatment device for sulfur-containing wastewater provided by the present invention includes an installation platform, and further includes a pretreatment mechanism and a vacuum degassing tank arranged on the installation platform. The pretreatment mechanism includes a box body and a filter screen assembly. A waste discharge cavity and a wastewater cavity are arranged adjacent to each other left and right in the box body. The filter screen assembly is located above the wastewater cavity. The filter screen assembly includes a screen frame and multiple blades. The screen frame is rotatably installed on the box body. The multiple blades are evenly arranged in the inner cavity of the screen frame and are rotatably installed on the screen frame. An eccentric shaft is connected to the end of the blade. A push block is slidably installed on the screen frame. Multiple strip-shaped grooves are provided on the push block. Each eccentric shaft is respectively inserted into each strip-shaped groove. An elastic member I is connected between the push block and the screen frame. A top-pushing member is provided on the inner wall of the box body. The filter screen assembly in the present invention is easy to clean and can improve the wastewater treatment efficiency.

Description

Technical Field

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

[0002] During the gas production process in gas fields, a large amount of sulfur-containing wastewater is generated. The sources of sulfur-containing wastewater are diverse. For example, groundwater dissolved with hydrogen sulfide and other sulfides is pumped out together with natural gas during gas production, and sulfur-containing wastewater is formed when the water injected into the gas field during the exploitation process mixes with formation water and then carries sulfides back to the ground. These sulfur-containing wastewaters are highly toxic and highly polluting, and need to be strictly treated before being discharged to avoid adverse effects on the environment.

[0003] Vacuum treatment is an effective method for removing sulfides from wastewater. By reducing the pressure of the system, the solubility of gases is reduced, so that the sulfur-containing gases dissolved in the liquid escape from the wastewater. The degassed wastewater is discharged for subsequent purification treatment, and the separated sulfur-containing gases are discharged up to standard or recycled after adsorption or incineration treatment.

[0004] In the prior art, a vacuum degassing tower or a vacuum degassing tank is generally used to conduct vacuum treatment on 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 matters therein, which can avoid the problem of equipment blockage in the subsequent treatment process and is an essential link in the entire vacuum degassing treatment process.

[0005] In the prior art, the sewage is generally filtered through a filter screen to remove impurities such as particulate matters contained therein. For example, a kind of oilfield sewage softening treatment device with hierarchical filtration disclosed in the patent with the authorization announcement number CN215288293U 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 inside the soft water treatment tank. An orifice plate is fixedly connected below the flow equalizing plate. Resin is arranged below the orifice plate. The filter frame is arranged 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 be able to conduct hierarchical filtration on the insoluble small particle solid impurities in the sewage.

[0006] However, when this device is in use, impurity particles filtered out will inevitably accumulate on the screen, which will cause the screen to be blocked. It is necessary to remove the screen for cleaning. And the screen in this device is located in the soft water treatment tank and in the installation groove on the filter frame below the resin, and the disassembly process is inconvenient. After the screen is removed, it is also necessary to manually clean the impurities stuck in the mesh holes of the screen, and the cleaning is rather troublesome. Summary of the Invention

[0007] The present invention provides a vacuum treatment device for sulfur-containing wastewater to solve the technical problem that when a filter screen is used to pre-treat sulfur-containing wastewater to be vacuum-treated in the prior art, the filter screen is easily blocked by impurity particles and is not convenient to clean.

[0008] The present invention also provides a vacuum treatment method for sulfur-containing wastewater. During the treatment of sulfur-containing wastewater by this method, the filter screen can be automatically cleaned to remove the particulate matter stuck in the screen holes of the filter screen, which can improve the wastewater treatment efficiency.

[0009] To solve the above problems, the vacuum treatment device for sulfur-containing wastewater provided by the present invention adopts the following technical solutions:

[0010] A vacuum treatment device for sulfur-containing wastewater includes an installation platform, and also includes a pretreatment mechanism and a vacuum degassing tank arranged on the installation platform;

[0011] The pretreatment mechanism includes a box body and a filter screen assembly arranged in the box body. A waste discharge cavity and a wastewater cavity are arranged adjacent to each other left and right in the box body. The vacuum degassing tank is communicated with the wastewater cavity. The filter screen assembly is located above the wastewater cavity. The filter screen assembly includes a screen frame and a plurality of strip-shaped blades. The end of the screen frame is rotatably installed on the box body around a rotation axis extending in the front-rear direction. The plurality of blades are evenly arranged in the inner cavity of the screen frame and are rotatably installed on the screen frame around a rotation axis parallel to the extension direction of the blades;

[0012] An eccentric shaft parallel to the rotation axis of the blade is connected to the end of the blade. A push block is slidably installed on the screen frame along the arrangement direction of the blades. A plurality of strip-shaped grooves are arranged on the push block, and each eccentric shaft is respectively inserted into each strip-shaped groove;

[0013] An elastic member I is connected between the push block and the screen frame. The elastic member I keeps the push block in a set position so that the blades are inclined relative to the frame surface of the screen frame;

[0014] A top-pushing member is arranged on the inner wall of the box body. The screen frame can be turned towards the waste discharge cavity. When the screen frame turns towards the waste discharge cavity and approaches the horizontal state, the top-pushing member pushes the push block to drive the blades to deflect to be perpendicular to the frame surface of the screen frame.

[0015] Adopting the above technical solutions, the filter screen assembly includes a screen frame and a plurality of blades rotatably installed on the screen frame. The inclination angles of the blades are different, and the vertical intervals between adjacent two blades are also different. By pushing the push block, the inclination angle of the blades can be adjusted. When the filter screen assembly is horizontally arranged above the wastewater cavity, the plurality of blades are in a relatively inclined state, and the vertical interval between adjacent two blades is short. When the screen frame turns towards the waste discharge cavity until the push block is pushed by the top-pushing member, the push block drives the blades to deflect to a state perpendicular to the frame surface of the screen frame through the strip-shaped grooves. At this time, the vertical interval between adjacent two blades increases, and the particulate matter stuck between adjacent two blades can fall into the waste discharge cavity.

[0016] In the process of using the device for wastewater treatment, when a large amount of impurities accumulate on the filter screen assembly and cause blockage, simply turn the filter screen assembly towards the impurity discharge cavity, and the impurities on the filter screen assembly can be poured into the impurity discharge cavity. There is no need to manually remove the filter screen assembly to pour out the impurities. At the same time, during the deflection process of the filter screen assembly, the push block can be triggered by the top push member to deflect each blade to a state perpendicular to the frame surface of the screen frame, thereby increasing the vertical interval between adjacent two blades, enabling the impurity particles stuck in the screen holes to automatically fall into the impurity discharge cavity. There is no need to manually remove the impurity particles stuck between adjacent two blades, realizing the automatic cleaning of the filter screen assembly. The cleaning process is more convenient, the cleaning efficiency of the filter screen assembly is higher, and overall it is beneficial to improve the wastewater treatment efficiency.

[0017] Furthermore, at least two groups of filter screen assemblies are arranged at intervals from top to bottom above the wastewater cavity, and the interval size between adjacent two blades in each group of filter screen assemblies decreases sequentially from top to bottom.

[0018] Adopting the above technical solution, at least two groups of filter screen assemblies are arranged at intervals up and down, and the screen hole sizes decrease sequentially from top to bottom, which can improve the filtering effect on wastewater and is beneficial to removing the impurity particles with smaller sizes contained in the wastewater.

[0019] Furthermore, the extending directions of the blades in each two adjacent groups of filter screen assemblies arranged vertically are perpendicular to each other.

[0020] Adopting the above technical solution, since the screen holes are formed by the space between adjacent two blades in the filter screen assembly and the screen holes are long strip-shaped, the screening effect on slender impurities is not good. Making the blades in two adjacent groups of filter screen assemblies arranged vertically keeps the screen holes vertical, which is beneficial to screening slender impurities.

[0021] Furthermore, the front and rear side walls of the screen frame are respectively in contact with the front and rear box walls of the box body. When the screen frame is horizontally arranged directly above the wastewater cavity, its right end is in contact with the right side wall of the box body. One end of the screen frame rotatably connected to the box body is vertically connected with a baffle, and the baffle is located on the side of the screen frame for facing the wastewater.

[0022] Adopting the above technical solution, when the filter screen assembly is in a horizontal state directly above the wastewater cavity, the front, rear and right side frame walls of the screen frame are respectively in contact with the corresponding box walls of the box body, ensuring that all the injected wastewater can pass through the filter screen assembly for filtration and then fall, avoiding the problem of wastewater leakage during filtration. A baffle is also connected to the screen frame, and the baffle separates the space above the impurity discharge cavity and the space above the wastewater cavity, preventing the wastewater falling on the filter screen assembly from splashing and falling into the impurity discharge cavity, ensuring that all the injected wastewater is filtered.

[0023] Further, the baffle is rotatably connected to the sieve frame about a rotation axis extending in the front-rear direction. A vibration assembly is provided between the baffle and the sieve frame. The vibration assembly includes a first vibration structure and a second vibration structure. The first vibration structure is provided on the baffle, and the second vibration structure is provided on the sieve frame. The baffle can rotate relative to the sieve frame when the sieve frame is flipped towards the impurity discharge cavity to a state close to horizontal, thereby driving the first vibration structure and the second vibration structure to move relative to each other to generate vibration.

[0024] With the above technical solution, a vibration assembly is provided between the baffle and the sieve frame. When the sieve frame is flipped towards the impurity discharge cavity to a state close to horizontal, the baffle rotates relative to the sieve frame to drive the first vibration structure and the second vibration structure in the vibration assembly to move relative to each other, so that the filter sieve assembly generates vibration. Through vibration, the impurities adhered to the filter sieve assembly can be shaken off, and the filter sieve assembly can be better cleaned. The baffle serves both as a blocking structure for blocking waste water from falling into the impurity discharge cavity and as a triggering structure for triggering the vibration assembly to generate vibration. It serves two purposes with a simple and ingenious structure. The vibration is generated by the relative rotation between the baffle and the sieve frame, rather than the relative movement between the sieve frame and the box body, which can relatively reduce the vibration received by the box body.

[0025] Further, the first vibration structure is an arc-shaped friction rod centered on the rotation center of the baffle, and the second vibration structure is an arc-shaped friction hole coaxially provided on the sieve frame. The arc-shaped friction rod is inserted into the arc-shaped friction hole. A plurality of elastic annular protrusions I are arranged at intervals along the rod length direction of the arc-shaped friction rod on the outer side of the arc-shaped friction rod, and a plurality of elastic annular protrusions II are arranged at intervals along the hole length direction of the arc-shaped friction hole on the hole wall of the arc-shaped friction hole. During the process of the arc-shaped friction rod sliding in the arc-shaped friction hole, the elastic annular protrusion I and the elastic annular protrusion II collide and rub against each other to generate vibration.

[0026] With the above technical solution, during the relative rotation of the baffle and the sieve frame, the arc-shaped friction rod slides in the arc-shaped friction hole, and the elastic annular protrusion I and the elastic annular protrusion II collide and rub against each other to generate vibration. The structure is simple and convenient to arrange.

[0027] Further, a torsion spring is connected between the baffle and the sieve frame. An active stop block is provided below each filter sieve assembly. The active stop block is elastically slidably installed on the box wall of the box body in the front-rear direction. The active stop block is vertically opposite to the impurity discharge cavity. One side of the active stop block facing the waste water cavity is a pushing inclined surface that slopes towards the outside of the box body from left to right, and one side of the active stop block facing the impurity discharge cavity is a vertically extending stop plane.

[0028] With the above technical solution, when the filtering sieve assembly swings towards the impurity discharge cavity to a nearly horizontal state, the baffle contacts the stop plane in the movable stop block located below it and is blocked by the movable stop block, so that the baffle can rotate relative to the sieve frame, triggering vibration. When the filtering sieve assembly starts to swing towards the impurity discharge cavity, the baffle and the sieve frame sequentially contact the pushing inclined plane of the movable stop block located above the sieve frame, pushing the movable stop block to slide towards the outside of the box body and cross over the movable stop block, avoiding the influence of the movable stop block on the swing of the filtering sieve assembly located below it.

[0029] Further, a waste discharge port communicating with the bottom of the impurity discharge cavity is provided on the box wall of the box body. A waste discharge auger is provided at the bottom of the impurity discharge cavity, and the conveying end of the waste discharge auger extends to the waste discharge port. A collection box is provided outside the box body, and the collection box is located below the waste discharge port.

[0030] With the above technical solution, a waste discharge auger is provided at the bottom of the impurity discharge cavity, and a collection box is provided outside the box body, which is convenient for cleaning and collecting the impurities accumulated in the impurity discharge cavity.

[0031] Further, a protective cover covering the outside of the push block and the first elastic member is installed on the sieve frame. A strip-shaped hole extending along the sliding direction of the push block is provided on the protective cover. A bearing push rod is connected to the push block, and the bearing push rod passes through the strip-shaped hole and extends to the outside of the protective cover. The pushing member drives the push block to move by pushing the bearing push rod during the flipping process of the sieve frame.

[0032] With the above technical solution, a protective cover is provided outside the push block and the first elastic member, which can prevent the waste water splashed during the process of injecting waste water and the impurities contained therein from falling on the push block and the first elastic member and affecting the sliding of the push block. The bearing push rod is connected to the push block and extends to the outside of the protective cover. The bearing push rod cooperates with the pushing member and is pushed by the pushing member to drive the push block to slide, and the sliding of the push block is not affected by being wrapped by the protective cover.

[0033] The beneficial effects of the sulfur-containing waste water vacuum treatment device provided by the present invention are as follows: When using the filtering sieve assembly to filter large-particle impurities in the waste water before the waste water enters the vacuum degassing tank, if the filtering sieve assembly is blocked, only need to drive the filtering sieve assembly to flip towards the impurity discharge cavity, then the impurities accumulated on the filtering sieve assembly can be poured out, and the vertical interval between adjacent two blades can be increased, so that the large-particle impurities stuck between adjacent two blades can fall. During this period, the filtering sieve assembly can also be vibrated by the vibration assembly to better remove the impurities on the filtering sieve assembly, realizing the automatic cleaning of the filtering sieve assembly, with higher cleaning efficiency of the filtering sieve assembly, and overall improving the waste water treatment efficiency.

[0034] The present invention also provides a sulfur-containing waste water vacuum treatment method, which is realized by adopting the above sulfur-containing waste water vacuum treatment device. The method includes the following steps: S1. Inject the sulfur-containing waste water into the box body from above the filtering sieve assembly, and the waste water flows through the filtering sieve assembly and falls into the waste water cavity;

[0035] S2. The driving filter screen assembly is flipped towards the impurity discharge cavity, and the impurities accumulated above the filter screen assembly fall into the impurity discharge cavity. When the filter screen assembly is flipped to a nearly horizontal state, the pushing member pushes the push block to slide, driving the blades to deflect to be perpendicular to the frame surface of the screen frame, and the impurities stuck between two adjacent blades are released and fall into the impurity discharge cavity;

[0036] S3. The filtered wastewater flows from the wastewater cavity into the vacuum degassing tank for degassing treatment to remove sulfides in the sulfur-containing wastewater.

[0037] The beneficial effect of a sulfur-containing wastewater vacuum treatment method provided by the present invention is that: by using this method to treat sulfur-containing wastewater, large particulate impurities contained in the wastewater can be effectively removed before the wastewater enters the vacuum degassing tank, and the filter screen assembly used for filtering the wastewater can be cleaned in time, which can improve the efficiency of filtering wastewater. Overall, the wastewater treatment efficiency can be effectively improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 is the front view of a sulfur-containing wastewater vacuum treatment device provided by the present invention;

[0039] Figure 2 is Figure 1 the enlarged schematic view of the structure at A in

[0040] Figure 3 is the left view of a sulfur-containing wastewater vacuum treatment device provided by the present invention;

[0041] Figure 4 is the top view of a sulfur-containing wastewater vacuum treatment device provided by the present invention;

[0042] Figure 5 is the plane cross-sectional view of the pretreatment mechanism in a sulfur-containing wastewater vacuum treatment device provided by the present invention;

[0043] Figure 6 is the three-dimensional cross-sectional view of the pretreatment mechanism in a sulfur-containing wastewater vacuum treatment device provided by the present invention;

[0044] Figure 7 is Figure 6 the enlarged schematic view of the structure at B in

[0045] Figure 8 is the structural schematic view of two groups of filter screen assemblies in a sulfur-containing wastewater vacuum treatment device provided by the present invention;

[0046] Figure 9 is the structural schematic view of the upper filter screen assembly in a sulfur-containing wastewater vacuum treatment device provided by the present invention;

[0047] Figure 10 A cross-sectional view of the filter screen assembly located below in a sulfur-containing wastewater vacuum treatment device provided by the present invention;

[0048] Figure 11 For Figure 10 A schematic enlarged view of the structure at position C in;

[0049] Figure 12 A schematic structural view of the blade in a sulfur-containing wastewater vacuum treatment device provided by the present invention.

[0050] Explanation of reference numerals:

[0051] 1. Installation platform; 2. Vacuum degassing tank; 3. Box body; 301. Water inlet; 302. Impurity discharge port; 303. Impurity discharge cavity; 304. Wastewater cavity; 305. Water outlet; 4. Collection box; 5. Sedimentation tank; 6. Flocculant storage tank; 7. Installation plate; 8. Movable stop block; 801. Pushing inclined surface; 802. Stopping plane; 9. Guide rod; 10. Pressing plate; 11. Second elastic member; 12. Partition plate; 121. Vertical plate section; 122. Inclined plate section; 123. Arc plate section; 13. Impurity discharge auger; 14. First pushing member; 15. Second pushing member; 16. Baffle; 17. Screen frame; 171. Arc friction hole; 18. Arc friction rod; 19. Blade; 20. Protective cover; 21. Bearing push rod; 22. Pushing block; 221. Strip-shaped groove; 23. First elastic member; 24. Eccentric shaft; 25. First elastic annular protrusion; 26. Second elastic annular protrusion; 27. Hinge shaft; 28. Connecting plate; 29. First conveying pipeline; 30. Second conveying pipeline; 31. Third conveying pipeline; 32. PH adjustment box. Detailed implementation manners

[0052] 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. Those skilled in the art should know that the following described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative efforts fall within the scope of protection of the present invention.

[0053] The following is one of the embodiments of a sulfur-containing wastewater vacuum treatment device provided by the present invention:

[0054] As Figures 1-12 shown, a sulfur-containing wastewater vacuum treatment device includes an installation platform 1, a pretreatment mechanism, a sedimentation tank 5, and a vacuum degassing tank 2.

[0055] As Figures 1-4 shown, the installation platform 1 is arranged on the horizontal ground, and the pretreatment mechanism, the sedimentation tank 5, and the vacuum degassing tank 2 are all installed on the installation platform 1.

[0056] As Figure 5 、 Figure 6 shown, the pretreatment mechanism includes a box body 3, a filter screen assembly, a pushing member, and a movable stopper 8.

[0057] 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 section 121, an inclined plate section 122, and an arc plate section 123 that are sequentially connected from top to bottom. The vertical plate section 121 is connected between the front and rear side walls of the box body 3. The inclined plate section 122 inclines leftward from top to bottom, and the opening of the arc plate section 123 faces upward and is connected to the left side wall of the box body 3. The partition plate 12 divides the inner cavity of the box body 3 into a waste removal chamber 303 and a wastewater chamber 304 that are arranged in sequence from left to right.

[0058] A waste removal auger 13 extending in the front and rear directions is installed at the bottom of the waste removal chamber 303. A waste removal port 302 communicating with the bottom of the waste removal chamber 303 is provided on the front side wall of the box body 3, and the conveying end of the waste removal auger 13 extends to the waste removal port 302. As Figures 1-4 shown, a collection box 4 is also installed on the installation platform 1. The collection box 4 is located on the front side of the box body 3 and below the waste removal port 302. The waste removal auger 13 can convey the impurities at the bottom of the waste removal chamber 303 towards the waste removal port 302, so that the impurities fall into the collection box 4.

[0059] As Figure 6 shown, a water inlet 301 is provided on the right side wall of the box body 3. The water inlet 301 is located above the wastewater chamber 304, and a water outlet 305 communicating with the wastewater chamber 304 is provided on the left side wall of the box body 3.

[0060] As Figure 5 、 Figure 6 、 Figure 8 shown, there are two groups of filter screen assemblies. Both groups of filter screen assemblies are installed in the inner cavity of the box body 3 and above the wastewater chamber 304, and the two groups of filter screen assemblies are spaced apart from top to bottom.

[0061] The structures of the upper and lower two groups of filter screen assemblies are basically the same. For simplicity of description, only the structure of the upper filter screen assembly is described in detail.

[0062] The upper filter screen assembly includes a screen frame 17, blades 19, a pushing block 22, a first elastic member 23, a baffle 16, a shield 20, and a vibration assembly.

[0063] The screen frame 17 is of a square frame structure. One end of the screen frame 17 is rotatably installed on the box body 3 around a rotation axis extending in the front and rear directions. The front and rear side walls of the screen frame 17 are respectively attached to the front side wall and the rear side wall of the box body 3. The right side wall surface of the screen frame 17 is a circular arc surface. When the screen frame 17 is horizontally arranged directly above the wastewater chamber 304, the right side wall surface of the screen frame 17 abuts against the right side wall of the box body 3.

[0064] As shown Figure 9 in the figure, there are multiple blades 19. The blades 19 are strip-shaped and extend in the front-back direction. The multiple blades 19 are arranged at equal intervals along the width direction of the sieve frame 17 in the inner cavity of the sieve frame 17. As shown Figure 12 in the figure, each of the front and rear ends of the blade 19 is connected with a hinge shaft 27 extending in the front-back direction. The two hinge shafts 27 are coaxial. The blade 19 is rotationally mounted on the sieve frame 17 through the two hinge shafts 27. The front end of the blade 19 is connected with an eccentric shaft 24 extending in the front-back direction. The eccentric shaft 24 is located above the hinge shaft 27 and there is a gap between the eccentric shaft 24 and the hinge shaft 27.

[0065] As shown Figure 9 in the figure, the push block 22 is slidably mounted on the front side of the sieve frame 17 along the width direction of the sieve frame 17. One side of the push block 22 facing away from the rotation axis of the sieve frame 17 is connected with a connecting plate 28, and a bearing push rod 21 is connected to the connecting plate 28.

[0066] The push block 22 is also provided with a plurality of strip-shaped grooves 221 equal in number to the number of the blades 19. The plurality of strip-shaped grooves 221 extend in the direction perpendicular to the frame surface of the sieve frame 17 and are equally spaced along the sliding direction of the push block 22 on the push block 22. Each eccentric shaft 24 on each blade 19 is respectively inserted into each corresponding strip-shaped groove 221. When the push block 22 slides, it pushes each eccentric shaft 24 to move through the strip-shaped grooves 221, thereby driving the blade 19 to deflect around the hinge shaft 27.

[0067] The first elastic member 23 is connected between the connecting plate 28 and the sieve frame 17. The first elastic member 23 is a compression spring capable of expanding and contracting along the width direction of the sieve frame 17. When the first elastic member 23 is not subjected to an external force, the position of the push block 22 makes the blade 19 remain in a state inclined relative to the frame surface of the sieve frame 17. At this time, the vertical interval between two adjacent blades 19 is smaller.

[0068] The baffle 16 is hinged on one end of the sieve frame 17 that is rotationally mounted on the box body 3 around an axis extending in the front-back direction. A torsion spring is connected between the baffle 16 and the sieve frame 17.

[0069] The shield 20 is mounted on the sieve frame 17 and wraps the push block 22 and the first elastic member 23. The top of the shield 20 is provided with a strip-shaped hole extending along the sliding direction of the push block 22. The bearing push rod 21 passes through the strip-shaped hole and extends to the outside of the shield 20.

[0070] As shown Figure 9 , Figure 10 , Figure 11As shown in the figure, the vibration assembly includes a first vibration structure and a second vibration structure. The first vibration structure 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 second vibration structure is an arc-shaped friction hole 171 opened on the sieve frame 17. The arc-shaped friction hole 171 is coaxial with the arc-shaped friction rod 18, and the arc-shaped friction rod 18 slidably penetrates through the arc-shaped friction hole 171.

[0071] A plurality of first elastic annular protrusions 25 are provided on the outer side of the arc-shaped friction rod 18, and the plurality of first elastic annular protrusions 25 are equally spaced along the rod length direction of the arc-shaped friction rod 18. A plurality of second elastic annular protrusions 26 are provided on the hole wall of the arc-shaped friction hole 171, and the plurality of second elastic annular protrusions 26 are equally spaced along the hole length direction of the arc-shaped friction hole 171.

[0072] As Figure 8 shown in the figure, the structure of the lower filter screen assembly is basically the same as that of the upper filter screen assembly, and the difference lies in that: the extending direction of the blade 19 in the lower filter screen assembly is perpendicular to the extending direction of the blade 19 in the upper filter screen assembly, the sliding direction of the push block 22 in the lower filter screen assembly is perpendicular to the sliding direction of the push block 22 in the upper filter screen assembly, and the telescopic direction of the first elastic member 23 in the lower filter screen assembly is perpendicular to the telescopic direction of the first elastic member 23 in the upper filter screen assembly.

[0073] As Figure 5 、 Figure 6 shown in the figure, there are two pushing members, namely a first pushing member 14 and a second pushing member 15, and the first pushing member 14 and the second pushing member 15 respectively correspond to the upper and lower groups of filter screen assemblies.

[0074] The first pushing member 14 is a plate-like structure inclined leftward from top to bottom. The first pushing member 14 is fixedly installed on the front side wall of the box body 3, and the first pushing member 14 is located at the lower left of the rotation axis of the sieve frame 17 in the corresponding filter screen assembly. During the process of the upper filter screen assembly flipping towards the impurity discharge cavity 303, the supporting push rod 21 contacts the top surface of the first pushing member 14 and is pushed to drive the push block 22 to slide.

[0075] The second pushing member 15 is a plate-like structure inclined forward from top to bottom. The second pushing member 15 is fixedly installed on the left side wall of the box body 3, and the second pushing member 15 is located below the rotation axis of the sieve frame 17 in the corresponding filter screen assembly. During the process of the lower filter screen assembly flipping towards the impurity discharge cavity 303, the corresponding supporting push rod 21 contacts the top surface of the second pushing member 15 and is pushed to drive the corresponding push block 22 to slide.

[0076] As Figure 5 、 Figure 6As shown, there are two movable stoppers 8, which are vertically spaced apart and are both slidably mounted back and forth on the left part of the front side wall of the box body 3 located to the left of the partition plate 12. The two movable stoppers 8 are respectively located right below the two pushing members.

[0077] As Figure 7 shown, the left side of the movable stopper 8 is a vertically extending stopping plane 802, and the right side of the movable stopper 8 is a pushing inclined plane 801 that slopes forward from left to right.

[0078] As Figure 1 、 Figure 2 shown, two L-shaped mounting plates 7 are connected to the outside of the front side wall of the box body 3. The two mounting plates 7 are respectively opposite to the two movable stoppers 8 in the front and back. A guide rod 9 extending back and forth is connected to the front side of the movable stopper 8. The guide rod 9 passes through the mounting plate 7 from back to front. A pressing plate 10 is connected to the front end of the guide rod 9. An elastic member II 11 is sleeved on the guide rod 9. The elastic member II 11 is connected between the movable stopper 8 and the mounting plate 7, so that the movable stopper 8 can elastically slide in the front and back directions.

[0079] As Figures 1-4 shown, the sedimentation tank 5 is installed on the installation platform 1. The sedimentation tank 5 is connected to the water outlet 305 on the box body 3 through a first conveying pipeline 29. A flocculant storage tank 6 is installed on the conveying pipeline. The wastewater filtered by the filter screen assembly in the wastewater chamber 304 is conveyed into the sedimentation tank 5 through the first conveying pipeline 29. During the conveying process of the wastewater in the first conveying pipeline 29, the flocculant storage tank 6 injects flocculant into the first conveying pipeline 29. The flocculant is mixed with the flowing wastewater and finally flows into the sedimentation tank 5 for sedimentation.

[0080] A PH adjustment tank 32 is provided beside the sedimentation tank 5. The PH adjustment tank 32 is connected to the sedimentation tank 5 through a third conveying pipeline 31. The sedimented wastewater enters the PH adjustment tank 32 through the third conveying pipeline 31 for PH value adjustment.

[0081] The vacuum degassing tank 2 is installed on the installation platform 1. The vacuum degassing tank 2 includes structures such as a tank body, packing, a vacuum system, a water distribution device, and an exhaust system. The tank body is connected to the PH adjustment tank 32 through a second conveying pipeline 30. The sulfur-containing wastewater enters the vacuum degassing tank 2 for degassing treatment after the PH is adjusted in the PH adjustment tank 32, so that the sulfide in the sulfur-containing wastewater becomes a gas and is separated from the liquid. The vacuum degassing tank 2 is a prior art, and its structure will not be described in detail here.

[0082] The present invention can filter the sulfur-containing wastewater before it 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 clean the impurities accumulated on the filter screen assembly in a timely manner. The impurities stuck in the filter screen assembly can be loosened and fall off the filter screen assembly during the flipping process of the filter screen assembly, which is more convenient for cleaning.

[0083] In this embodiment, there are two groups of filter screen assemblies. In other embodiments, only one group of filter screen assemblies is provided. At this time, the interval size between two adjacent blades 19 in the filter screen assembly is relatively small to ensure that both large particle and small particle impurities can be filtered out.

[0084] 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.

[0085] In this embodiment, the first vibration structure is an arc friction rod 18 with an elastic annular protrusion 25 on the outside, and the second vibration structure is an arc friction hole 171 with an elastic annular protrusion 26 on the hole wall. In other embodiments, the first vibration structure is a flat plate 1 vertically connected to the baffle 16, and an elastic protrusion 1 is provided on the plate surface of the flat plate 1. The second vibration structure is a flat plate 2 vertically connected to the screen frame 17, and an elastic protrusion 2 is provided on the plate surface of the flat plate 2. The flat plate 1 and the flat plate 2 are staggered in the front-back direction, and the elastic protrusion 2 and the elastic protrusion 1 are arranged facing each other. During the rotation of the baffle 16 relative to the screen frame 17, the elastic protrusion 1 and the elastic protrusion 2 collide with each other to generate friction.

[0086] A sulfur-containing wastewater vacuum treatment method provided by the present invention is realized by using the above-mentioned sulfur-containing wastewater vacuum treatment device. The method includes the following steps:

[0087] S1. Inject the sulfur-containing wastewater into the box body 3 from the water inlet 301. The wastewater flows through the upper and lower groups of filter screen assemblies in sequence and falls into the wastewater cavity 304. The impurities in the wastewater remain above the two groups of filter screen assemblies;

[0088] S2. When a large amount of impurities accumulate on the filter screen assembly, stop water injection, drive the upper filter screen assembly to flip towards the impurity discharge chamber 303. The impurities accumulated above the filter screen assembly gradually fall into the impurity discharge chamber 303. When the filter screen assembly flips to a nearly horizontal state, the first top push member 14 contacts the bearing push rod 21 and pushes the bearing push rod 21 to drive the push block 22 to move along 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-shaped groove 221, driving the blade 19 to deflect to be perpendicular to the frame surface of the screen frame 17. The vertical interval between adjacent two blades 19 increases, and the impurities stuck between the adjacent two blades 19 are loosened and fall into the impurity discharge chamber 303. While the blade 19 deflects, the baffle 16 is blocked by the blocking plane 802 of the movable stop block 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. The first elastic annular protrusion 25 and the second elastic annular protrusion 26 rub and collide with each other to generate vibration, shaking off the impurities adhering to the filter screen assembly. Then drive the filter screen assembly to rotate in the reverse direction to reset;

[0089] S3. Drive the lower filter screen assembly to flip towards the impurity discharge chamber 303, and repeat the subsequent actions in step S3 to clean the lower filter screen assembly and reset it after cleaning;

[0090] S4. The filtered wastewater enters the first conveying pipeline 29 from the wastewater chamber 304. The flocculant storage tank 6 inputs flocculant into the first conveying pipeline 29. The wastewater mixed with the flocculant enters the sedimentation tank 5 for sedimentation. The sedimented wastewater enters the pH adjustment tank 32 through the third conveying pipeline 31 for pH adjustment, and then enters the vacuum degassing tank 2 through the second conveying pipeline 30 for degassing treatment to remove sulfides in the sulfur-containing wastewater;

[0091] S5. Drive the impurity discharge auger 13 to rotate. The impurity discharge auger 13 pushes the impurities in the impurity discharge chamber 303 into the collection box 4 through the impurity discharge 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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