Rotational flow air flotation oil and slag removal integrated device for pretreatment of coking sewage

Abstract

The invention provides a rotational flow air flotation oil and slag removal integrated device for coking sewage pretreatment, an air release cavity, and a first guide cylinder and a second guide cylinder which are symmetrically arranged at two ends of the air release cavity are arranged in an air flotation tank, and the outer wall of the air release cavity is divided into two diffusion areas which are distributed in an axial symmetry manner; a plurality of spiral diffusion blades are distributed in each diffusion area in the axial direction of the air release cavity, a plurality of wave-shaped flow guide plates used for guiding flow of sewage guided into the first flow guide cylinder and the second flow guide cylinder from the overflow port are arranged in the first flow guide cylinder and the second flow guide cylinder, and air supply pipes used for conveying air into the first flow guide cylinder and the second flow guide cylinder are arranged at the ends, close to the air release cavity, of the first flow guide cylinder and the second flow guide cylinder; the problems that an existing efficient coking wastewater air flotation pretreatment device is limited in coking wastewater treatment effect, prone to blockage and difficult to clean, multiple power components are integrated, the component connecting mode is not stable, consequently, the overall energy consumption is high, and the operation stability, the gas distribution uniformity and the air flotation efficiency are affected are solved.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of oil removal and residue removal by cyclone air flotation, and particularly relates to an oil removal and residue removal integrated device for pretreatment of coking wastewater. BACKGROUND

[0002] Oil removal and residue removal by cyclone air flotation refers to a physical treatment technology for efficiently separating oil stains and solid residues in water by using centrifugal force generated by cyclone and adhesion of air flotation micro-bubbles. The existing technology usually adopts an oil removal and residue removal device by cyclone air flotation to achieve pretreatment of coking wastewater and the like.

[0003] A kind of coking wastewater high-efficiency air flotation pretreatment device and its processing method are disclosed in the patent with publication number CN116715304B, which sets up rotatable cylinder structure in air flotation tank, multiple groups of bubble dispersion components are distributed on the cylinder, each group is composed of circumferentially uniformly arranged first blades, longitudinal and transverse channels are arranged inside, air is sent into the cylinder through hollow pipe by air blower, then enters the longitudinal channel of first blade through through hole and is discharged along transverse channel to form micro-bubbles;At the same time, the first motor is started to drive the cylinder to rotate, the water flow is disturbed by using rotating blades, the bubble generation frequency is disturbed, bubble merging is prevented, bubble diameter is reduced, and the contact adsorption efficiency of bubbles and impurities such as coking wastewater is improved, so as to enhance the oil removal effect. However, the treatment effect of the above-mentioned patent on coking wastewater is limited, and there are problems of easy blockage and difficult cleaning, in addition, the following structural defects also exist: On the one hand, the system integrates multiple power components, the overall energy consumption is high, and the dynamic seal between the key parts such as the cylinder and the hollow pipe is in a rotating air supply state for a long time, which is easy to leak or enter water due to wear, affecting the operation stability; On the other hand, the connection mode of the components is not stable, such as the second blade is only fixed by the slot and the elastic device, which has the risk of loosening in high-speed rotation, affecting the uniformity of gas distribution and the air flotation efficiency.

[0004] Therefore, the present application proposes a cyclone air flotation oil removal and residue removal integrated device for pretreatment of coking wastewater to overcome the above-mentioned defects. SUMMARY

[0005] The purpose of the present application is to solve the problems of high overall energy consumption, affecting operation stability and uniformity of gas distribution and air flotation efficiency caused by the limited treatment effect of the existing coking wastewater high-efficiency air flotation pretreatment device on coking wastewater, easy blockage and difficult cleaning, integration of multiple power components, and unstable connection mode of components.

[0006] In order to achieve the above-mentioned purpose, the present application provides a cyclone air flotation oil removal and residue removal integrated device for pretreatment of coking wastewater, which comprises a cyclone cone and an air flotation tank. The cyclone cone is divided into an overflow section and a underflow section from top to bottom, the overflow section is provided with an overflow port, and the lower end of the overflow section is connected with an extension section capable of moving axially and used for adjusting the taper of the cyclone cone, and the underflow section is capable of discharging impurities in sewage outward; The air release chamber is provided with a first flow guide cylinder and a second flow guide cylinder symmetrically arranged at two ends of the air release chamber, the outer wall of the air release chamber is divided into two diffusion regions which are axially symmetric, each diffusion region is provided with a plurality of spiral diffusion blades along the axial direction of the air release chamber, the first flow guide cylinder and the second flow guide cylinder are both provided with a plurality of wave-shaped flow guide plates for guiding the sewage introduced from the overflow port, and the ends close to the air release chamber of the first flow guide cylinder and the second flow guide cylinder are provided with air supply pipes for supplying air into the first flow guide cylinder and the second flow guide cylinder, When the sewage in the first flow guide cylinder and the second flow guide cylinder combines with air and is introduced into the air release chamber, bubbles can be generated in the air release chamber and diffused outward through the plurality of spiral diffusion blades to adsorb impurities in the sewage.

[0007] As an option, the overflow section is provided with a filter box communicated with the overflow port, the filter box is divided into a water inlet section, a detection section and a water outlet section in sequence along the circumferential direction, the water inlet section is provided with a first filter frame for preliminary filtration of the sewage, the detection section is provided with a first turbidity sensor for detecting and feeding back the sewage after preliminary filtration, and the water outlet section is provided with a second filter frame for re-filtering of the sewage and a second turbidity sensor for detecting and feeding back the sewage after re-filtering.

[0008] As an option, the lower ends of the detection section and the water outlet section are both provided with a backwater pipe communicated with the cyclone cone, the backwater pipe is provided with a first control valve, when the detection data fed back by the first turbidity sensor and / or the second turbidity sensor exceeds a preset turbidity value, the detection section and / or the water outlet section can return the sewage to the cyclone cone through the backwater pipe and the first control valve.

[0009] As an option, the overflow section is provided with a support ring, the lower end of the support ring is provided with a plurality of electric push rods capable of driving the overflow section to move axially relative to the underflow section along the circumferential direction.

[0010] As an option, the extension section has an extension cylinder, the two ends of the extension cylinder are movably connected to the overflow section and the underflow section respectively, when the plurality of electric push rods drive the overflow section, the extension cylinder can move relative to the overflow section and / or the underflow section to adjust the taper of the cyclone cone.

[0011] As an option, the end of the first flow guide cylinder and the second flow guide cylinder communicated with the air release chamber is provided with a connecting port, the connecting port is provided with two sealing rings along the axial direction, and the two sealing rings are used to connect the air release chamber.

[0012] Optionally, the gas release cavity is provided with connecting interfaces at two ends, and the outer sides of the connecting interfaces are axially sleeved with two limiting rings, the structures of the two limiting rings being matched with the structures of the two sealing rings.

[0013] Optionally, the gas release cavity is provided with a support, and the support is provided with turbine blades, when the sewage of the first flow guide cylinder and the second flow guide cylinder is introduced into the gas release cavity, the sewage can drive the turbine blades to drive the gas release cavity to rotate relative to the first flow guide cylinder and the second flow guide cylinder.

[0014] Optionally, the turbine blades are provided with two baffles at two ends, the two baffles divide the inside of the gas release cavity into two cavities, the two cavities are communicated with the first flow guide cylinder and the second flow guide cylinder respectively, so as to guide the sewage introduced into the gas release cavity in the first flow guide cylinder and the second flow guide cylinder.

[0015] Optionally, each spiral diffusion vane is sequentially divided into a first release area, a second release area and a third release area along the radial direction, a plurality of through holes for releasing bubbles are arranged in the three release areas, and the diameters of the plurality of through holes in the three release areas decrease in turn.

[0016] The beneficial effects of the present application are as follows: The cyclone gas floatation oil removal and residue removal integrated device for coking wastewater pretreatment provided by the application divides the cyclone cone cylinder into an overflow section and a underflow section from top to bottom, and the lower end of the overflow section is connected with an extension section with an axially movable adjustable taper. The cyclone effect of the wastewater in the cyclone cone cylinder can be optimized by adjusting the extension section to change the taper of the cyclone cone cylinder. Under different tapers, the wastewater cyclone path and speed distribution change, so that the impurities in the wastewater are more fully separated from the water, the impurities are more easily discharged from the underflow section, the separation effect of the impurities in the coking wastewater is improved, and the overall treatment effect is enhanced. By arranging a gas release cavity, a first flow guide cylinder and a second flow guide cylinder in the gas floatation tank, the wastewater in the first flow guide cylinder and the second flow guide cylinder is combined with air and then introduced into the gas release cavity, bubbles are generated in the gas release cavity, and the bubbles are diffused outward through a plurality of spiral diffusion blades. The uniform diffusion of the bubbles can increase the contact area with the impurities in the wastewater, more effectively adsorb the impurities in the wastewater, and improve the treatment effect of the coking wastewater. A plurality of wave-shaped flow guide plates can also be arranged inside the first flow guide cylinder and the second flow guide cylinder to guide the wastewater introduced from the overflow port. The wave-shaped flow guide plates can change the flow state of the wastewater, so that the wastewater flows more smoothly and the deposition of impurities in the flow guide cylinder is reduced. At the same time, the bubbles generated in the gas release cavity can carry some small impurities to the water surface during the diffusion process, so as to facilitate cleaning and solve the problems of easy blockage and difficult cleaning. In addition, two diffusion regions that are axially symmetrically distributed are arranged on the outer wall of the gas release cavity, and a plurality of spiral diffusion blades are arranged in each diffusion region along the axis of the gas release cavity. The bubbles can be uniformly diffused in the gas release cavity to quickly adsorb the impurities in the wastewater, so that the impurities quickly float to the water surface, high-efficiency gas floatation separation is realized, and the gas floatation efficiency is significantly improved.

[0017] According to the above, the technical scheme of the application can effectively solve the problems of the existing coking wastewater high-efficiency gas floatation pretreatment device, such as limited treatment effect, easy blockage and difficult cleaning, integrated multiple power components, unstable component connection mode, high overall energy consumption, and influence on operation stability, gas distribution uniformity and gas floatation efficiency.

[0018] Other features and advantages of the application will be described in detail in the following specific embodiments. BRIEF DESCRIPTION OF DRAWINGS

[0019] The application can be better understood by reference to the following description taken in conjunction with the accompanying drawings, in which like or similar elements are referred to with the same or similar reference numerals, and in which:

[0020] Figure 1 A structural schematic diagram of a cyclone gas floatation oil removal and residue removal integrated device for coking wastewater pretreatment according to an embodiment of the application is shown; Figure 2 A sectional view of a cyclone cone cylinder according to an embodiment of the application is shown; Figure 3 shows a sectional view of a filter box according to an embodiment of the present application; Figure 4 shows a structural schematic diagram of an air flotation tank according to an embodiment of the present application; Figure 5 shows a structural schematic diagram of a cleaning box according to an embodiment of the present application; Figure 6 shows a sectional view of a first flow guide cylinder according to an embodiment of the present application; Figure 7 shows a sectional view of a gas release cavity in a first perspective according to an embodiment of the present application; Figure 8 shows a sectional view of a gas release cavity in a second perspective according to an embodiment of the present application.

[0021] Reference signs: 1, cyclone cone; 101, overflow section; 102, underflow section; 103, extension section; 2, air flotation tank; 3, overflow port; 4, gas release cavity; 401, connecting interface; 402, through slot; 5, first flow guide cylinder; 6, second flow guide cylinder; 7, spiral diffusion vane; 701, through hole; 8, wave-shaped flow guide plate; 9, air supply pipe; 901, air outlet; 10, filter box; 1001, water inlet section; 1002, detection section; 1003, water outlet section; 11, first filter frame; 12, first turbidity sensor; 13, second filter frame; 14, second turbidity sensor; 15, optical sensor; 16, handle; 17, backwater pipe; 18, first control valve; 19, overflow pipe; 20, second control valve; 21, water inlet pipe; 22, underflow port; 23, discharge pipe; 24, third control valve; 25, support ring; 26, electric push rod; 27, connecting rod; 28, extension cylinder; 29, bearing table; 30, support rod; 31, water delivery pipe; 32, fourth control valve; 33, shunt pipe; 34, fifth control valve; 35, air blower; 36, connecting port; 3601, sealing ring; 37, limiting ring; 38, bracket; 3801, turbine blade; 39, baffle; 40, spoiler; 41, cleaning box; 42, cleaning nozzle; 43, blocking plate; 44, cleaning pipe. DETAILED DESCRIPTION

[0022] In order for those skilled in the art to more fully understand the technical solutions of the present application, in the following, exemplary embodiments of the present application will be described more fully and in greater detail with reference to the accompanying drawings. Obviously, one or more embodiments of the present application described below are only one or more of the specific manners in which the technical solutions of the present application can be implemented, and are not exhaustive. It should be understood that the technical solutions of the present application can be implemented in other manners belonging to the same general inventive concept without being limited by the exemplary described embodiments. Based on one or more embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work should belong to the scope of protection of the present application.

[0023] With reference to Figures 1-8 , the embodiments of the present application provide a cyclone gas float oil removal and residue removal integrated device for coking wastewater pretreatment, comprising a cyclone cone 1 and a gas float tank 2. The cyclone cone 1 is divided into an overflow section 101 and a underflow section 102 from top to bottom, the overflow section 101 is provided with an overflow port 3, and the lower end of the overflow section 101 is connected with an extension section 103 capable of moving axially and used for adjusting the taper of the cyclone cone 1, and the underflow section 102 is capable of discharging impurities in the wastewater outward; The gas float tank 2 is provided with a gas release cavity 4 and first and second flow guide cylinders 5 and 6 symmetrically arranged at two ends of the gas release cavity 4, the outer wall of the gas release cavity 4 is divided into two diffusion regions which are axially symmetric, a plurality of spiral diffusion vanes 7 are arranged in each diffusion region along the axial direction of the gas release cavity 4, the first and second flow guide cylinders 5 and 6 are each provided with a plurality of wave-shaped flow guide plates 8 used for guiding the wastewater introduced from the overflow port 3, and the ends close to the gas release cavity 4 of the first and second flow guide cylinders 5 and 6 are provided with air supply pipes 9 used for supplying air into the first and second flow guide cylinders 5 and 6, When the wastewater in the first and second flow guide cylinders 5 and 6 combines with the air and is introduced into the gas release cavity 4, bubbles can be generated in the gas release cavity 4 and diffused outward through the plurality of spiral diffusion vanes 7 to adsorb the impurities in the wastewater.

[0024] In an embodiment, the overflow section 101 is provided with a filter box 10 communicated with the overflow port 3, the filter box 10 is divided into a water inlet section 1001, a detection section 1002 and a water outlet section 1003 in sequence along the circumferential direction thereof, the water inlet section 1001 is provided with a first filter frame 11 used for preliminary filtration of the wastewater, the detection section 1002 is provided with a first turbidity sensor 12 used for detecting and feeding back the wastewater after preliminary filtration, and the water outlet section 1003 is provided with a second filter frame 13 used for re-filtration of the wastewater and a second turbidity sensor 14 used for detecting and feeding back the wastewater after re-filtration.

[0025] In a specific embodiment, the filter hole diameter of the first filter frame 11 is larger than the filter hole diameter of the second filter frame 13.

[0026] In a specific embodiment, optical sensors 15 are arranged in the first filter frame 11 and the second filter frame 13, and the optical sensors 15 are used to detect and feedback the impurity amount in the first filter frame 11 and the second filter frame 13.

[0027] In a specific embodiment, handles 16 are arranged on the first filter frame 11 and the second filter frame 13 for taking the first filter frame 11 and the second filter frame 13.

[0028] In an embodiment, the lower ends of the detection section 1002 and the water outlet section 1003 are provided with backwater pipes 17 connected to the cyclone cone 1, and the backwater pipes 17 are provided with first control valves 18, so that when the detection data fed back by the first turbidity sensor 12 and / or the second turbidity sensor 14 exceeds the preset turbidity value, the detection section 1002 and / or the water outlet section 1003 can return the sewage to the cyclone cone 1 through the backwater pipes 17 and the first control valves 18.

[0029] Specifically, after the sewage enters the filter box 10 through the overflow port 3, the large-particle suspended matters such as coal powder and tar residue that are not successfully separated in the cyclone cone 1 are first intercepted by the first filter frame 11, so as to reduce the subsequent processing load. The preliminarily filtered sewage enters the detection section 1002, and the first turbidity sensor 12 monitors the turbidity in real time. If the turbidity exceeds the standard, the sewage is returned to the cyclone cone 1 through the backwater pipes 17 and the first control valves 18 for re-separation. The sewage that meets the standard then enters the water outlet section 1003, and the colloids, small tar powder and other small particles are further removed by the second filter frame 13. The second turbidity sensor 14 detects again, and if the turbidity still exceeds the standard, the second backflow is triggered, forming a closed-loop control of “filtration-detection-backflow”. In addition, the optical sensors 15 arranged in the first filter frame 11 and the second filter frame 13 can monitor the impurity accumulation amount in real time. When the accumulation amount reaches the threshold value, the filter frame can be quickly replaced through the handle 16, so as to ensure the continuous and stable filtration efficiency.

[0030] Therefore, the present application effectively deals with the characteristics of complex composition and large water quality fluctuation of coking sewage by the linkage of double-stage filtration and double turbidity sensors, reduces the load and energy consumption of the subsequent air floatation treatment section, and guarantees the pretreatment water outlet stability through the dynamic backflow mechanism, In addition, the specific structures and working principles of the first turbidity sensor 12, the second turbidity sensor 14 and the optical sensor 15 are all prior art, and will not be described in detail herein.

[0031] In a specific embodiment, the overflow port 3 is connected to an overflow pipe 19 of the water inlet section 1001, and the overflow pipe 19 is provided with a second control valve 20 for regulating the sewage flow in the overflow pipe 19.

[0032] In one embodiment, two water inlets 21 are symmetrically arranged on the tangential direction of the overflow section 101, and are used to introduce sewage into the cyclone cone 1. Specifically, the sewage is introduced into the cyclone cone 1 through the two water inlets 21 in the tangential direction, so as to form a high-speed rotating flow field, and generate centrifugal force outward to make the water phase and light components rise along the wall of the cylinder to the overflow port 3, while the suspended solids and heavy components are gathered in the extension section 103 and sink, and finally the light components are naturally overflowed from the overflow port 3 and the heavy components are discharged from the underflow section 102 through the pressure difference and liquid level difference.

[0033] In a specific embodiment, the lower end of the underflow section 102 is provided with an underflow port 22 for discharging impurities outward, and the underflow port 22 is connected with a discharge pipe 23, and the discharge pipe 23 is provided with a third control valve 24 for controlling the flow thereof.

[0034] In one embodiment, a support ring 25 is sleeved on the overflow section 101, and the lower end of the support ring 25 is provided with a plurality of electric push rods 26 in the circumferential direction, which can drive the overflow section 101 to move axially relative to the underflow section 102.

[0035] In one embodiment, a connecting rod 27 is provided on the wall of the extension section 103, and springs (not shown in the figure) are sleeved on both ends of the connecting rod 27, and the springs at both ends are connected with the overflow section 101 and the underflow section 102 respectively.

[0036] In one embodiment, the extension section 103 has an extension cylinder 28, and both ends of the extension cylinder 28 are movably connected to the overflow section 101 and the underflow section 102 respectively, and when the plurality of electric push rods 26 drive the overflow section 101, the extension cylinder 28 can move relative to the overflow section 101 and / or the underflow section 102 to adjust the taper of the cyclone cone 1.

[0037] In a specific embodiment, the underflow section 102 is sleeved with a bearing table 29 for bearing the plurality of electric push rods 26.

[0038] Specifically, according to the taper calculation formula of the cone: wherein, represents the taper of the cone; represents the difference between the maximum diameter of the overflow section 101 and the minimum diameter of the underflow section 102; represents the length of the cyclone cone 1, and it is known that, when the value of is fixed, the taper of the cyclone cone 1 can be adjusted by changing the length of the cyclone cone 1.

[0039] Therefore, the extension section 103 provided by the present application can realize the adjustment of the taper of the cyclone cone 1. The taper of the cyclone cone 1 directly affects the tangential velocity and axial pressure gradient of the internal flow field thereof: when the length of the cyclone cone 1 is increased, the taper is slower, the residence time of the sewage in the cylinder is prolonged, the particles are more fully subjected to the centrifugal force, and the settlement and separation of the suspended matters such as the tiny coke powder and the colloid are facilitated, thereby realizing the effective removal of the high-concentration and fine-particle pollutants in the coking sewage; on the contrary, when the length of the cyclone cone 1 is shortened, the taper is steeper, the axial flow velocity of the internal flow field thereof is increased, the preliminarily separated sewage can be quickly discharged, the back mixing of the sewage in the equipment is reduced, the settled impurities are prevented from being rolled up again, and the coking sewage quality fluctuation can be flexibly adapted, and the separation effect is optimized. In addition, the taper adjustment can also reduce the load of the filter box 10, reduce the replacement frequency of the first filter frame 11 and the second filter frame 13, and improve the overall standard rate and operation economy of the coking sewage pretreatment.

[0040] In addition, the cylinder wall of the extension cylinder has a sealing layer for sealing between the overflow section and the underflow section to prevent the leakage of sewage. This structure is a conventional arrangement in the prior art, and the present application will not be described in more detail.

[0041] In an embodiment, the lower end of the bearing table 29 is provided with a support rod 30 for supporting the cyclone cone 1 along the circumference thereof.

[0042] In an embodiment, one end of the water outlet section 1003 is communicated with a water conveying pipe 31, one end of the water conveying pipe 31 is provided with a fourth control valve 32 for regulating the flow thereof, and the other end of the water conveying pipe 31 is communicated with a shunt pipe 33, and the two ends of the shunt pipe 33 are respectively communicated with the first flow guide cylinder 5 and the second flow guide cylinder 6.

[0043] In an embodiment, the first flow guide cylinder 5 and the second flow guide cylinder 6 are respectively provided with a fifth control valve 34 at the end communicated with the shunt pipe 33, and the fifth control valve 34 is used for regulating the flow of the shunt pipe 33.

[0044] Specifically, when the sewage is introduced into the shunt pipe 33 through the water conveying pipe 31 under the regulation of the fourth control valve 32, the fifth control valve 34 at one end of the first flow guide cylinder 5 and the second flow guide cylinder 6 further controls the flow and flow rate of the sewage, so as to more accurately match the introduction speed of the sewage according to the oil removal needs of the sewage, thereby improving the treatment precision and efficiency of the coking sewage.

[0045] In a specific embodiment, the air conveying pipe 9 is provided with a grid-shaped air outlet 901 at the port of the first flow guide cylinder 5 and / or the second flow guide cylinder 6, so as to discharge air. Specifically, the air is uniformly dispersed to significantly increase the contact area of the air and the sewage. The air is more efficiently dissolved in the sewage, and the bubble generation efficiency is improved.

[0046] In one embodiment, the other end of the air supply pipe 9 is connected with a blower 35 for delivering external air into the first guide cylinder 5 and / or the second guide cylinder 6. Specifically, the specific structure and working principle of the blower 35 are both prior art, and the present application will not be described in more detail here.

[0047] In one embodiment, the end of the first guide cylinder 5 and the second guide cylinder 6 that communicates with the gas release cavity 4 is provided with a connecting port 36, and two sealing rings 3601 are arranged in the connecting port 36 along the axial direction thereof for connecting the gas release cavity 4.

[0048] In a specific embodiment, the two ends of the gas release cavity 4 are provided with connecting interfaces 401, and the outer side of the connecting interfaces 401 is sleeved with two limiting rings 37 along the axial direction thereof, and the structure of the two limiting rings 37 is adapted to the structure of the two sealing rings 3601.

[0049] Specifically, by arranging the two sealing rings 3601 and the two limiting rings 37, when the first guide cylinder 5 and / or the second guide cylinder 6 is rotationally connected with the gas release cavity 4, the two sealing rings 3601 and the two limiting rings 37 form a double dynamic sealing structure, so that even if a single layer of sealing is slightly worn due to long-term rotation friction, another layer of sealing can still maintain airtightness. At the same time, the axial sleeving structure of the two limiting rings 37 can limit the radial deviation of the guide cylinder and the gas release cavity 4, reduce the misalignment wear during rotation, and prolong the service life of the sealing element, thereby effectively solving the problem that the dynamic sealing is in a rotating state for a long time and is prone to air leakage or water ingress due to wear, and improving the operation stability of the device of the present application.

[0050] In a specific embodiment, the two sealing rings 3601 are both made of hydrogenated nitrile rubber and composite fluororubber material.

[0051] In a specific embodiment, the two limiting rings 37 are both made of stainless steel with polytetrafluoroethylene plated on the surface.

[0052] Specifically, the hydrogenated nitrile rubber serves as a basic layer, and its saturated nitrile structure endows the sealing ring with excellent wear resistance, tear resistance and oil resistance, can withstand the erosion of coal tar, benzene series and other organic solvents in coking sewage for a long time, while maintaining the elastic recovery ability and reducing the sealing surface wear caused by rotation friction; the fluororubber serves as a surface coating layer, and by utilizing its extremely low air permeability and chemical inertness, a dense molecular barrier is formed to effectively block the penetration of high-pressure gas, while resisting the attack of strong corrosive media such as chloride ions and sulfides in sewage.

[0053] The stainless steel material plated with polytetrafluoroethylene on the surface can provide high-strength support to limit the axial deviation of the gas release cavity 4, and the polytetrafluoroethylene has an ultra-low friction coefficient, which can reduce the wear rate of the rotating contact surface between the two limiting rings 37 and the two sealing rings 3601, and ensure long-term close fitting therebetween.

[0054] In an embodiment, a support 38 is arranged in the gas release cavity 4, and the support 38 is provided with turbine blades 3801. When the sewage in the first flow guide cylinder 5 and the second flow guide cylinder 6 is introduced into the gas release cavity 4, the sewage can drive the turbine blades 3801 to drive the gas release cavity 4 to rotate relative to the first flow guide cylinder 5 and the second flow guide cylinder 6. Specifically, when the first flow guide cylinder 5 and the second flow guide cylinder 6 introduce the sewage into the gas release cavity 4, the sewage flows through the turbine blades 3801, and the circumferential shear stress of the water flow on the turbine blades 3801 forms a driving torque to make the gas release cavity 4 rotate relative to the first flow guide cylinder 5 and the second flow guide cylinder 6 around the central axis. During rotation, a centrifugal vortex field is formed inside the gas release cavity 4, which on the one hand accelerates the sedimentation and separation of suspended matters such as fine coke powder and colloids in the sewage through centrifugal force, and reduces the subsequent treatment load; on the other hand, the shear force generated by rotation can enhance the mixing efficiency of the released bubbles in the gas release cavity 4 and the sewage, so that the bubbles are more uniformly dispersed in the sewage, and the gas floatation separation effect or the oxidation reaction rate is improved. Compared with the driving structure of the gas release cavity 4 integrated with multiple power components, the driving technical solution of the gas release cavity 4 of the present application can greatly reduce the overall energy consumption.

[0055] In an embodiment, the turbine blades 3801 are provided with two baffles 39 at both ends, which divide the inside of the gas release cavity 4 into two cavities, and the two cavities are respectively connected with the first flow guide cylinder 5 and the second flow guide cylinder 6 to guide the sewage introduced into the gas release cavity 4 in the first flow guide cylinder 5 and the second flow guide cylinder 6. Specifically, the two cavities are only in a communication state when the turbine blades 3801 are in a communication state, so that when the sewage in the first flow guide cylinder 5 and the second flow guide cylinder 6 flows through the turbine blades 3801 along the corresponding cavities, not only can the turbine blades 3801 be provided with stronger rotating power, but also the sewage can be further stirred to generate a large number of bubbles and combine with oil or light impurities, so as to realize the gas floatation treatment of the sewage.

[0056] In an embodiment, the wall of the gas release cavity 4 is provided with a through groove 402 corresponding to each spiral diffusion blade 7 along the axial direction, and the through groove 402 is used to guide the bubbles out of each spiral diffusion blade 7.

[0057] In a specific embodiment, each spiral diffusion blade 7 is sequentially divided into a first release area, a second release area and a third release area along the radial direction, and a plurality of through holes 701 for releasing bubbles are arranged in the three release areas, and the diameters of the plurality of through holes 701 in the three release areas decrease in turn.

[0058] Specifically, the gas in the gas release cavity 4 is oriented and transported to each spiral diffusion vane 7 through the axial through slot 402, and three release areas radially divided on each spiral diffusion vane 7 form a gradient distribution of bubble sizes: the large-diameter through hole 701 in the first release area generates coarse bubbles, which quickly rise to form an initial flotation zone to capture large-particle suspended matter in the sewage; the medium-diameter through hole 701 in the second release area generates medium bubbles, which prolong the contact time of bubbles with sewage and strengthen the adhesion to medium-particle pollutants; and the small-diameter through hole 701 in the third release area generates micro-bubbles, which adsorb tiny colloids and dissolved pollutants through the high specific surface area characteristics.

[0059] In addition, the rotating motion of each spiral diffusion vane 7 further drives the bubble groups to diffuse in a spiral flow state, expands the gas-liquid contact area, and prevents bubble aggregation at the same time. Compared with the traditional single bubble size release method, the removal rate of suspended solids can be significantly improved, and the continuous release of micro-bubbles effectively maintains the stability of the flotation layer, so as to realize the deep purification of high-concentration and multi-particle distribution suspended solids in coking wastewater.

[0060] It is worth noting that each spiral diffusion vane 7 of the present application is fixedly connected with the gas release cavity 4, so as to avoid the risk of loosening and ensure the operation stability and uniformity of gas distribution and flotation efficiency.

[0061] In one embodiment, the outer wall of the gas release cavity 4 is divided into two turbulence regions that are distributed in axial symmetry, and a plurality of turbulence plates 40 arranged in a zigzag manner are arranged in each turbulence region. The plurality of turbulence plates 40 are used to disturb the sewage and bubbles in the flotation tank 2.

[0062] Specifically, when the gas release cavity 4 rotates, the periodically sheared flow field is formed by the axially symmetric turbulence regions, and the edges of the plurality of turbulence plates 40 arranged in a zigzag manner produce high-frequency vortex disturbance to the surrounding sewage, which breaks large-scale bubbles into smaller bubbles and prolongs the residence time of bubbles in the sewage. The turbulent flow region formed by the zigzag arrangement can promote the bubbles to collide violently with the tiny colloids, fine coke powder and other pollutants in the sewage, thereby enhancing the adhesion probability of the bubbles. The axial symmetry layout ensures the uniformity of the flow field and avoids local dead zones, so that the suspended solids in the flotation tank 2 form a stable scum layer in the whole area, thereby improving the flotation treatment efficiency of the coking wastewater.

[0063] In one embodiment, one end of the flotation tank 2 is provided with a cleaning box 41, and one side of the cleaning box 41 is provided with a plurality of cleaning nozzles 42 penetrating through and beyond the wall of the flotation tank 2. The plurality of cleaning nozzles 42 are used to flush the impurities in the flotation tank 2.

[0064] In a specific embodiment, one end of the flotation tank 2 is provided with a blocking plate 43, which is configured to be capable of being taken out to discharge the impurities in the flotation tank 2 outward.

[0065] Specifically, the cleaning tank 41 can be communicated with an external water supply device through a pipe body, and the cleaning tank 41 is internally provided with a plurality of valve bodies for controlling a plurality of cleaning nozzles 42, so as to quickly remove the impurities deposited in the air flotation tank 2.

[0066] In addition, the peripheral side of the blocking plate 43 is provided with a sealing ring, so that it can be blocked in the air flotation tank 2 to ensure the sealing of the bottom of the air flotation tank 2.

[0067] In one embodiment, the fifth control valve 34 is connected with a cleaning pipe 44, and the other end of the cleaning pipe 44 is communicated with an external cleaning device, so as to clean the air release chamber 4, the first flow guide cylinder 5 and the second flow guide cylinder 6. Specifically, the external cleaning device can release cleaning liquid according to the cleaning needs, so as to clean the inside of the air release chamber 4, the first flow guide cylinder 5 and the second flow guide cylinder 6, so as to ensure the stable operation of the cyclone air flotation oil and slag removal integrated device.

[0068] In addition, the first control valve 18, the second control valve 20, the third control valve 24 and the fourth control valve 32 of the present application are all single-seat regulating valves, and the fifth control valve 34 is a double-seat regulating valve.

[0069] It is worth noting that the above-mentioned electrical structures of the present application can be connected to external control devices such as host computers to realize electrical control, so as to achieve the purpose of accurately regulating and controlling the cyclone air flotation oil and slag removal integrated device in the coking wastewater pretreatment stage.

[0070] The specific structure and working principle of the single-seat regulating valve, the double-seat regulating valve and the host computer are all prior art, and the present application will not be described in more detail here.

[0071] When the cyclone air flotation oil and slag removal integrated device of the present application is used to pretreat coking wastewater: Firstly, the wastewater is introduced into the cyclone cone 1 along the tangential symmetry through the two water inlet pipes 21, forming a high-speed rotating flow field, and the centrifugal force makes the water phase and light components rise along the cylinder wall to the overflow port 3, and the suspended solids and heavy components are collected in the extension section 103 and sink, and then are discharged outward through the underflow port 22 of the underflow section 102.

[0072] Then, the wastewater of the overflow port 3 is introduced into the water inlet section 1001 of the filter tank 10 through the overflow pipe 19, and after being intercepted by the first filter frame 11, it enters the detection section 1002, and the first turbidity sensor 12 monitors in real time, if it exceeds the standard, the wastewater is returned to the cyclone cone 1 through the backwater pipe 17 and the first control valve 18 for re-separation, and the wastewater that meets the standard enters the water outlet section 1003, and is further removed by the second filter frame 13, and the second turbidity sensor 14 detects again, if it still exceeds the standard, the secondary reflux is triggered.

[0073] Then, the filtered sewage is introduced into the shunt pipe 33 through the water pipe 31 and the fourth control valve 32, and then enters the guide cylinder after the flow and speed are regulated by the fifth control valve 34 at one end of the first guide cylinder 5 and the second guide cylinder 6. The wave-shaped guide plate 8 in the guide cylinder guides the sewage, and the air is uniformly sent into the guide cylinder through the grid-shaped air outlet 901 by the air blower 35, so that the air is combined with the sewage.

[0074] Then, the combined sewage is introduced into the air release cavity 4, the turbine blade 3801 drives the air release cavity 4 to rotate, and the centrifugal vortex field is formed inside. At the same time, the gas in the air release cavity 4 is directionally delivered to the spiral diffusion blade 7 through the axial through slot 402, the three release areas divided along the radial direction on the spiral diffusion blade 7 form a gradient distribution of bubble size, different size bubbles are diffused outward, adsorb impurities in the sewage, and the spiral diffusion blade 7 further drives the bubble group to diffuse in a spiral flow state, and the several spoiler plates 40 in the turbulence area of the outer wall of the air release cavity 4 disturb the sewage and bubbles in the air flotation tank 2, so that the bubbles fully collide and adhere to the pollutants in the sewage, and a stable scum layer is formed.

[0075] Finally, the treated sewage is discharged from the air flotation tank 2, the impurities in the air flotation tank 2 can be flushed by the several cleaning nozzles 42 of the cleaning box 41, and the sealing plate 43 is opened to discharge, and at the same time, the air release cavity 4, the first guide cylinder 5 and the second guide cylinder 6 can be cleaned by connecting the external cleaning equipment through the cleaning pipe 44.

[0076] The cyclone gas floatation oil removal and residue removal integrated device for coking wastewater pretreatment is characterized in that the cyclone cone cylinder is divided into an overflow section and a underflow section from top to bottom, and the lower end of the overflow section is connected with an extension section capable of moving axially and adjusting the taper.

[0077] While one or more embodiments of the present application have been described above, it should be understood by those skilled in the art that the present application can be implemented in any other forms without departing from the spirit and scope of the present application as defined by the appended claims. Therefore, the above-described embodiments are illustrative rather than restrictive, and many modifications and substitutions are obvious to those skilled in the art without departing from the spirit and scope of the present application as defined by the appended claims.

Claims

1. A cyclone flotation integrated oil and slag removal device for coking wastewater pretreatment, characterized in that, Including vortex cones and flotation tanks; The vortex cone is divided into an overflow section and a bottom flow section from top to bottom. The overflow section is equipped with an overflow port, and the lower end of the overflow section is connected to an extension section that can move axially and is used to adjust the taper of the vortex cone. The bottom flow section can discharge impurities in the sewage to the outside. The dissolved air flotation tank is equipped with a gas release chamber and a first and second guide cylinder symmetrically arranged at both ends of the gas release chamber. The outer wall of the gas release chamber is divided into two axially symmetrical diffusion zones. Each diffusion zone has several spiral diffusion blades arranged along the axial direction of the gas release chamber. The interiors of the first and second guide cylinders are equipped with several corrugated guide plates for guiding the sewage introduced into them from the overflow port. An air supply pipe for supplying air into the gas release chamber is provided at one end of both cylinders near the gas release chamber. When the wastewater in the first and second guide tubes combines with air and is introduced into the gas release chamber, bubbles are generated in the gas release chamber and diffused outward through several spiral diffusion blades to adsorb impurities in the wastewater.

2. The integrated cyclone flotation oil and slag removal device for coking wastewater pretreatment according to claim 1, characterized in that, The overflow section is equipped with a filter box connected to the overflow port. The filter box is divided into an inlet section, a detection section and an outlet section along its circumference. The inlet section is equipped with a first filter frame for preliminary filtration of sewage. The detection section is equipped with a first turbidity sensor for detecting and providing feedback on the preliminarily filtered sewage. The outlet section is equipped with a second filter frame for further filtration of sewage and a second turbidity sensor for detecting and providing feedback on the second-filtered sewage.

3. The integrated cyclone flotation oil and slag removal device for coking wastewater pretreatment according to claim 2, characterized in that, Both the detection section and the effluent section are equipped with a return water pipe connected to the vortex cone at their lower ends. A first control valve is installed on the return water pipe. When the detection data fed back by the first turbidity sensor and / or the second turbidity sensor exceeds the preset turbidity value, the detection section and / or the effluent section can return the sewage to the vortex cone through the return water pipe and the first control valve.

4. The integrated cyclone flotation oil and slag removal device for coking wastewater pretreatment according to claim 3, characterized in that, A support ring is fitted onto the overflow section, and several electric push rods are provided at the lower end of the support ring along its circumference, which can drive the overflow section to move axially relative to the underflow section.

5. The integrated cyclone flotation oil and slag removal device for coking wastewater pretreatment according to claim 4, characterized in that, The extension section has an extension cylinder, the two ends of which are movably connected to the overflow section and the underflow section, respectively. When several electric push rods drive the overflow section, the extension cylinder can move relative to the overflow section and / or the underflow section to adjust the taper of the vortex cone.

6. The integrated cyclone flotation oil and slag removal device for coking wastewater pretreatment according to claim 5, characterized in that, Both the first and second guide tubes have a connection port at the end that is connected to the gas release chamber. Two sealing rings are arranged along the axial direction inside the connection port, and the two sealing rings are used to connect the gas release chamber.

7. The integrated cyclone flotation oil and slag removal device for coking wastewater pretreatment according to claim 6, characterized in that, The gas release chamber is provided with connection interfaces at both ends, and two limiting rings are sleeved on the outer side of the connection interface along its axial direction. The structure of the two limiting rings is adapted to the structure of the two sealing rings.

8. The integrated cyclone flotation oil and slag removal device for coking wastewater pretreatment according to claim 7, characterized in that, The gas release chamber is equipped with a support frame, on which turbine blades are mounted. When wastewater from the first and second guide cylinders is introduced into the gas release chamber, the wastewater can drive the turbine blades to rotate the gas release chamber relative to the first and second guide cylinders.

9. The integrated cyclone flotation oil and slag removal device for coking wastewater pretreatment according to claim 8, characterized in that, Two baffles are provided at both ends of the turbine blades. The two baffles divide the interior of the gas release chamber into two cavities. The two cavities are respectively connected to the first guide tube and the second guide tube to guide the sewage introduced into the gas release chamber from the first guide tube and the second guide tube.

10. The integrated cyclone flotation oil and slag removal device for coking wastewater pretreatment according to claim 9, characterized in that, Each of the spiral diffusion blades is divided into a first release zone, a second release zone, and a third release zone in sequence along its radial direction. Several through holes for releasing bubbles are evenly distributed in the three release zones, and the diameter of the several through holes in the three release zones decreases in sequence.

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