Composite fluorine and silicon removal precipitation device for coking wastewater

Abstract

The invention relates to the technical field of coking wastewater treatment, in particular to a composite defluorination and desiliconization precipitation device for coking wastewater, comprising: a reaction tank for regulating the pH value of the internal coking wastewater; the water inlet assembly comprises a water inlet and a floating pipe which are arranged at the bottom of the reaction tank in a penetrating manner, the water inlet pushes the floating pipe to slide upwards when coking wastewater flows in, and the water inlet resets downwards and seals the water inlet when no coking wastewater flows in; the homogenizing wheel stirs and mixes the coking wastewater and a flocculating agent when the floating pipe floats upwards, and physically isolates the upper layer and the lower layer when the floating pipe slides downwards and resets; spraying of a flocculating agent and stirring of the homogenizing wheel are synchronously triggered during water feeding, so that wastewater is fully mixed with the agent, and the reaction efficiency is improved; when no water enters, the water inlet is automatically closed and the pesticide is stopped, so that waste is reduced and backflow is prevented; the blades are flattened to isolate upper and lower layers after water feeding is stopped, so that upper-layer liquid is prevented from being polluted by impurities during slag removal, and the secondary treatment effect is guaranteed.

Description

Technical Field

[0001] This invention relates to the field of coking wastewater treatment technology, and in particular to a composite defluorination and desiliconization precipitation device for coking wastewater. Background Technology

[0002] In the coking industry, large amounts of coking wastewater are generated during coke refining, gas purification, and chemical product recovery. This wastewater contains not only organic pollutants such as phenols and cyanides, but also fluorides and silicate impurities. Fluorides mainly originate from the high-temperature leaching of fluorine-containing minerals in coking raw materials (such as coal), as well as contact with fluorine-containing media during subsequent cooling and washing processes. Silicates mainly come from the hydrolysis of aluminosilicate components in raw materials and the trace corrosion of silicate materials on the inner walls of equipment during production. If this fluoride- and silicate-containing coking wastewater is discharged directly without effective treatment, fluoride ions will seep into the soil and accumulate in groundwater, hindering the growth of surrounding crops and potentially harming the human skeletal and nervous systems through the food chain. Silicates will form hard silica scale on the inner walls of subsequent treatment equipment (such as pipes and heat exchangers), reducing the heat transfer efficiency of the equipment, shortening its service life, and the shedding of silica scale may also clog pipes, affecting production continuity.

[0003] Currently, the industry mainly uses chemical precipitation as the core technology for defluorination and desiliconization treatment of coking wastewater. The basic principle is to add specific agents (such as calcium salts and aluminum salts commonly used for defluorination, and polyaluminum chloride and polyacrylamide flocculants commonly used for desiliconization) to the wastewater to adjust the pH value. This causes fluoride ions to react with calcium ions to form calcium fluoride precipitate, and silicate ions to react with aluminum ions to form aluminum silicate flocs. Stirring is then used to promote the full mixing and reaction of the agents with the wastewater. Finally, the precipitates are removed through precipitation and separation, thus purifying the wastewater.

[0004] Existing sedimentation devices for defluorination and desiliconization of coking wastewater still have significant technical defects: the influent, dosing, and stirring systems lack coordination, easily leading to asynchronous dosing of chemicals and wastewater inflow, resulting in uneven mixing, which affects the reaction effect and wastes chemicals; the stirring structure has a fixed function, only capable of mixing, and when cleaning the bottom sediment after the reaction, the sediment easily disperses and contaminates the upper liquid, interfering with secondary treatment; the slag discharge structure is poorly designed, with direct discharge or simple scraping not only having low cleaning efficiency and easily leaving sediment residue, but also failing to achieve solid-liquid separation, resulting in a large amount of treated wastewater being discharged with the slag, causing resource waste.

[0005] A Chinese patent with authorization announcement number CN223385997U discloses a desiliconization and defluoridation device for a high-concentration membrane concentrate for zero-discharge coking wastewater. The device comprises a deep desiliconization unit, an alternating defluoridation precipitation unit, and a precise defluoridation unit connected in series. The deep desiliconization unit includes a desiliconization reaction tank and a desiliconization precipitation tank connected in series. A desiliconization stirrer is installed in the desiliconization reaction tank, and a first flocculant dosing device and a first liquid alkali dosing device are installed on the desiliconization reaction tank. The alternating defluoridation precipitation unit includes a defluoridation precipitation tank, in which a defluoridation stirrer is installed. The effluent from the desiliconization precipitation tank is transported to the defluoridation precipitation tank, and a first sulfuric acid dosing device is installed on the pipeline between the desiliconization precipitation tank and the defluoridation precipitation tank. The precise defluoridation unit includes a secondary defluoridation reaction tank and a secondary defluoridation clarification tank connected in series. A second flocculant dosing device and a second sodium hydroxide dosing device are installed on the inlet pipeline of the secondary defluoridation reaction tank, and the effluent from the defluoridation precipitation tank is sent to the secondary defluoridation reaction tank.

[0006] However, the above-mentioned sedimentation device requires multi-stage sedimentation, occupies a large area, and has low efficiency in liquid reciprocating transport. If secondary sedimentation is carried out in the original sedimentation tank, the sludge from the previous sedimentation needs to be removed. However, the removal process may leave residues, and water flow disturbance can easily cause the sediment to spread again and cause pollution. Therefore, a separate sedimentation reaction tank that can remove sediment is needed to treat coking wastewater. Summary of the Invention

[0007] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0008] In view of the problems existing in the prior art, the present invention is proposed.

[0009] To solve the above-mentioned technical problems, the present invention provides the following technical solution: a composite defluorination and desiliconization precipitation device for coking wastewater, comprising: a reaction tank, wherein the reaction tank is used to regulate the pH value of the coking wastewater inside;

[0010] The water inlet assembly includes a water inlet that extends through the bottom of the reaction tank. A floating tube is slidably installed inside the water inlet. When coking wastewater flows in, the water inlet pushes the floating tube upward and slides upward. When no coking wastewater flows in, the water inlet returns to its original position downward and closes the water inlet.

[0011] The homogenizing wheel mixes the coking wastewater and flocculant when the floating tube floats up, and physically isolates the upper and lower layers when the floating tube slides down and resets.

[0012] As a preferred embodiment of the composite defluorination and desiliconization precipitation device for coking wastewater described in this invention, a drive motor is fixedly installed above the reaction tank, and a dosing shaft is connected to the output end of the drive motor through a rotary joint. The dosing shaft is used to drive the homogenizing wheel to rotate. While the floating tube slides upward, the water flow comes into contact with the dosing shaft, and the dosing shaft sprays out flocculant and mixes with the coking wastewater.

[0013] As a preferred embodiment of the composite defluorination and desiliconization precipitation device for coking wastewater described in this invention, the reaction tank is provided with a slag discharge chamber at the bottom, a slag discharge wheel at the bottom of the reaction tank, an arc-shaped plate arranged in a circular array on the slag discharge wheel, and a slag discharge door that rotates open on the outer wall of the reaction tank.

[0014] As a preferred embodiment of the composite defluorination and desiliconization precipitation device for coking wastewater described in this invention, the inner wall of the inlet is provided with a conical cavity, a sealing ball is movably provided in the conical cavity, a connecting shaft is fixedly provided on the sealing ball, the connecting shaft extends upward and is fixedly connected to the floating tube, and a first elastic element is provided between the floating tube and the inlet.

[0015] In a preferred embodiment of the composite defluorination and desiliconization precipitation device for coking wastewater described in this invention, the homogenizing wheel is movably sleeved on the outer wall of the floating tube, the inner wall of the homogenizing wheel is provided with a spiral groove, the outer wall of the floating tube is provided with a protrusion, and the protrusion is slidably disposed in the spiral groove.

[0016] As a preferred embodiment of the composite defluorination and desiliconization precipitation device for coking wastewater described in this invention, the homogenizing wheel is provided with a rotating shaft on its outer wall, and blades are sleeved on the outer wall of the rotating shaft. When the blades are laid flat, they are assembled into a complete circle. An adjustment frame is also provided on the inner wall of the reaction tank.

[0017] As a preferred embodiment of the composite defluorination and desiliconization precipitation device for coking wastewater described in this invention, wherein: a fixed ring is rotatably provided on the outer wall of the adjusting frame, a swing arm is provided at one end of the rotating shaft that rotatably extends to the outside of the adjusting frame, a waist-shaped groove is provided on the swing arm, a protruding post is fixedly provided on the outer wall of the fixed ring, and the protruding post is slidably provided inside the waist-shaped groove.

[0018] As a preferred embodiment of the composite defluorination and desiliconization precipitation device for coking wastewater described in this invention, wherein: a zigzag rod is provided on the outer wall of the dosing shaft, and the dosing shaft drives the fixing ring and the homogenizing wheel to rotate on the inner wall of the reaction tank through the zigzag rod.

[0019] As a preferred embodiment of the composite defluorination and desiliconization precipitation device for coking wastewater described in this invention, the lower end of the dosing shaft is provided with a pressure cap, which blocks the flocculant from flowing downward when in the initial position. When the floating pipe discharges water, it squeezes the pressure cap upward, and the flocculant is sprayed out and mixed with the water flow.

[0020] As a preferred embodiment of the composite defluorination and desiliconization precipitation device for coking wastewater described in this invention, the bottom of the reaction tank is further provided with a discharge port, and the inner wall of the slag discharge chamber is fitted with a turntable, on which filter holes are provided.

[0021] The beneficial effects of this invention are:

[0022] 1. Achieve coordinated control of water intake, chemical dosing, and stirring to improve reaction efficiency. When water is introduced, the coking wastewater pushes the floating pipe upward, simultaneously triggering the dosing shaft to spray flocculant and driving the homogenizing wheel to rotate and stir, so that the coking wastewater and flocculant are quickly and fully mixed, ensuring a more thorough defluorination and desiliconization reaction. When there is no water intake, the floating pipe automatically resets and closes the water inlet to prevent wastewater backflow. At the same time, the dosing shaft stops spraying, reducing flocculant waste and achieving precise matching of chemicals and water intake.

[0023] 2. The homogenizing wheel can automatically switch between stirring and isolation states, optimizing the processing flow. Through the cooperation of the protrusions on the outer wall of the floating tube and the spiral grooves on the inner wall of the homogenizing wheel, the blades of the homogenizing wheel swing to form a stirring angle when water is introduced, and the mixture is efficiently stirred under the drive of the drive motor. After the water is stopped, the floating tube resets and drives the blades to flatten and assemble, physically isolating the upper and lower layers of the reaction tank, avoiding the dispersion of impurities and contamination of the upper liquid when removing the scale solids at the bottom, and ensuring the treatment effect of subsequent secondary defluorination and desiliconization.

[0024] 3. Enhance bottom slag discharge and liquid recycling to improve processing efficiency; the slag discharge wheel and arc plate at the bottom of the reaction tank can efficiently scrape away the slag that accumulates at the bottom, and the slag discharge door enables convenient slag discharge; the design of the turntable and discharge port can filter the falling slag mixture, and the filtered liquid can be re-entered into the processing flow for secondary defluorination and desiliconization, improving resource utilization and overall processing efficiency.

[0025] 4. The sealing ball and conical cavity work together to achieve effective sealing and prevent wastewater backflow; the dosing shaft cover adopts a press-to-discharge or one-way valve structure to avoid coking wastewater from entering the dosing shaft and causing pollution, thus ensuring the purity of the flocculant; the various components achieve state switching through mechanical linkage, which is simple and convenient and improves the stability of the device operation. Attached Figure Description

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0027] Figure 1 This is a schematic diagram of the overall composite defluorination and desiliconization precipitation device for coking wastewater in this invention.

[0028] Figure 2 This is a structural diagram of the internal structure of the reaction vessel in this invention.

[0029] Figure 3 for Figure 2 Enlarged schematic diagram of the structure of region A in the middle.

[0030] Figure 4 This is a schematic diagram of the homogeneous wheel structure in this invention.

[0031] Figure 5 for Figure 4 Enlarged schematic diagram of the structure of region B in the middle.

[0032] Figure 6 This is a schematic diagram of the internal structure of the water inlet in this invention.

[0033] Figure 7 This is a schematic diagram of the interior of the slag discharge chamber in this invention.

[0034] Figure 8 This is a schematic diagram of the bottom structure of the reaction vessel in this invention.

[0035] Explanation of reference numerals in the attached diagram: 100, reaction vessel;

[0036] 200, Inlet; 201, Floating pipe; 2001, Conical cavity; 2002, Sealing ball; 2003, Connecting shaft; 2004, First elastic element;

[0037] 300. Homogenizing wheel; 3001. Spiral groove; 3002. Protrusion; 3003. Shaft; 3004. Blade; 3005. Adjusting frame; 3006. Fixing ring; 3007. Swing arm; 3008. Waist-shaped groove; 3009. Protruding column; 3011. Folding rod; 3012. Pressure cap;

[0038] 400. Drive motor; 401. Dosing shaft; 4001. Slag discharge chamber; 4002. Slag discharge wheel; 4003. Arc plate; 4004. Slag discharge door; 4005. Discharge port; 4006. Turntable; 4007. Filter hole. Detailed Implementation

[0039] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0041] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0042] Example 1

[0043] Reference Figures 1-6 This is the first embodiment of the present invention, which provides a composite defluorination and desiliconization precipitation device for coking wastewater;

[0044] Specifically, this includes reaction tank 100, which is used to regulate the pH value of the internal coking wastewater;

[0045] The water inlet assembly includes a water inlet 200 that runs through the bottom of the reaction tank 100. A floating pipe 201 is slidably installed inside the water inlet 200. When coking wastewater flows in, the water inlet 200 pushes the floating pipe 201 to slide upward. When no coking wastewater flows in, the water inlet 200 returns to its original position downward and closes the water inlet 200.

[0046] The homogenizing wheel 300 mixes the coking wastewater and flocculant when it floats on the floating tube 201, and physically isolates the upper and lower layers when the floating tube 201 slides down and resets.

[0047] The reaction tank 100 is fixedly equipped with a drive motor 400. The output end of the drive motor 400 is connected to a dosing shaft 401 through a rotary joint. The dosing shaft 401 is used to drive the homogenizing wheel 300 to rotate. While the floating tube 201 slides upward, the water flow comes into contact with the dosing shaft 401. The dosing shaft 401 sprays out flocculant and mixes with the coking wastewater.

[0048] Preferably, the output end of the drive motor 400 is connected to the dosing shaft 401 through a rotary joint. The dosing shaft 401 has a hollow structure inside. The flocculant enters the dosing shaft 401 through the rotary joint. After the coking wastewater is sprayed out from the floating pipe 201, it is mixed with the flocculant sprayed out from the dosing shaft 401. Subsequently, it is fully mixed by the stirring of the homogenizing wheel 300.

[0049] Better, such as Figure 6 The inner wall of the inlet 200 is provided with a conical cavity 2001, and a sealing ball 2002 is movably provided in the conical cavity 2001. A connecting shaft 2003 is fixedly provided on the sealing ball 2002. The connecting shaft 2003 extends upward and is fixedly connected to the floating tube 201. A first elastic element 2004 is provided between the floating tube 201 and the inlet 200.

[0050] Among them, the first elastic element 2004 is a spring, which is used to drive the floating tube 201 to slide downward and reset when there is no coking wastewater flowing in. The connecting shaft 2003 and the floating tube 201 are both cylindrical and their axes coincide.

[0051] Furthermore, the sealing ball 2002 is made of rubber, which forms a seal when it comes into contact with the inner wall of the conical cavity 2001 to prevent backflow of coking wastewater. The conical cavity 2001 is a cone-shaped cavity that is larger at the top and smaller at the bottom. The homogenizing wheel 300 adopts a common frame-type stirring wheel, and a telescopic disc is provided above the stirring wheel to provide physical isolation when it is unfolded.

[0052] In this process, when coking wastewater flows in, the water flow pushes the sealing ball 2002 upward, causing it to detach from the conical cavity 2001, and the liquid flows out along the floating pipe 201. It then mixes with the flocculant sprayed from the dosing shaft 401, and is further thoroughly mixed by the homogenizing wheel 300. Afterward, the wastewater flow is stopped, the floating pipe 201 resets to prevent backflow, and after settling, the homogenizing wheel 300 unfolds and isolates the upper and lower parts, allowing for separate removal of scale solids at the lower position, preventing impurities from contaminating the upper liquid during the removal process; thus improving the effectiveness of the second fluoride and calcium removal process.

[0053] Example 2

[0054] Reference Figures 1-5 This is the second embodiment of the present invention, which is based on the previous embodiment, except that the homogenizing wheel 300 can switch between stirring and isolation states.

[0055] Specifically, the homogenizing wheel 300 is movably sleeved on the outer wall of the floating tube 201, the inner wall of the homogenizing wheel 300 is provided with a spiral groove 3001, and the outer wall of the floating tube 201 is provided with a protrusion 3002, which is slidably disposed in the spiral groove 3001.

[0056] Preferably, the homogenizing wheel 300 has a rotating shaft 3003 on its outer wall for circumferential rotation, and blades 3004 are fitted on the outer wall of the rotating shaft 3003. When the blades 3004 are laid flat, they are assembled into a complete circle. An adjustment frame 3005 is also movably provided on the inner wall of the reaction vessel 100.

[0057] Among them, the spiral groove 3001 is a spiral-shaped groove, the protrusion 3002 is a circular protrusion that always slides along the spiral groove 3001, the adjusting frame 3005 and the homogenizing wheel 300 are set at the same center, and a connecting rod is provided between the adjusting frame 3005 and the homogenizing wheel 300 for fixing, so that the two move synchronously. The blade 3004 is flattened and set in conjunction with the connecting rod, thereby enhancing the physical isolation effect.

[0058] The adjusting frame 3005 has a fixed ring 3006 rotatably mounted on its outer wall. The rotating shaft 3003 rotatably passes through to one end of the adjusting frame 3005 and has a swing arm 3007. The swing arm 3007 has a waist-shaped groove 3008. The outer wall of the fixed ring 3006 is fixedly provided with a protruding post 3009, which slides inside the waist-shaped groove 3008.

[0059] The waist-shaped groove 3008 is larger than the protrusion 3009, which allows the protrusion 3009 to move within a wide range of motion inside the waist-shaped groove 3008, preventing accidental contact and jamming.

[0060] More preferably, the outer wall of the dosing shaft 401 is provided with a zigzag rod 3011, and the dosing shaft 401 drives the fixing ring 3006 and the homogenizing wheel 300 to rotate on the inner wall of the reaction vessel 100 through the zigzag rod 3011.

[0061] The folding rod 3011 is a right-angled shape and has two arms. One arm of the folding rod 3011 is fixedly connected to the dosing shaft 401, and the other arm is fixedly connected to the fixing ring 3006. There is a certain friction between the fixing ring 3006 and the adjusting frame 3005, so that the rotation of the fixing ring 3006 can drive the adjusting frame 3005 to rotate together. When the swing arm 3007 swings, it overcomes the friction and causes the fixing ring 3006 and the adjusting frame 3005 to rotate relative to each other.

[0062] Furthermore, such as Figure 5 As shown, in this embodiment, the lower end of the dosing shaft 401 is provided with a pressure cap 3012. When the pressure cap 3012 is in the initial position, it blocks the flocculant from flowing down. When the floating pipe 201 discharges water, it squeezes the pressure cap 3012 upward, and the flocculant is sprayed out and mixed with the water flow.

[0063] In this embodiment, the cap 3012 also adopts a push-to-discharge faucet, or it can also adopt a one-way valve structure. The cap 3012 is shaped like a disc, so that the sprayed flocculant can be evenly dispersed. It automatically sprays flocculant when water flows in and automatically closes when there is no water flow. The cap 3012 can prevent coking wastewater from entering the dosing shaft 401 and causing pollution.

[0064] In summary, when the floating pipe 201 moves upward and injects water, the flocculant is sprayed out from the dosing shaft 401 and fully mixed with the coking wastewater. At the same time, as the floating pipe 201 moves upward, it drives the protrusion 3002 on the outer wall to move upward. Since the protrusion 3002 also slides on the inner wall of the spiral groove 3001, the protrusion 3002 forces the homogenizing wheel 300 to start rotating as a whole, thereby causing the adjusting frame 3005 to rotate as a whole. The fixed ring 3006 is fixed, and finally the adjusting frame 3005 and the fixed ring 3006 rotate relative to each other, driving the swing arm 3007 to move. At the same time, it is limited by the protrusion 3009 in the waist-shaped groove 3008, thereby causing the rotating shaft 3003 and the blade 3004 to swing. The blade 3004 forms an angle with the horizontal plane. When the drive motor 400 drives the blade 3004 to rotate through the folding rod 3011, the mixed liquid is stirred, so that the flocculant and the coking wastewater are fully mixed and reacted.

[0065] When water is no longer injected into the floating pipe 201, the floating pipe 201 slides down to reset, blocking the feed inlet. At the same time, the pressure cap 3012 of the dosing shaft 401 resets, stopping the spraying of flocculant. Finally, the protrusion 3002 on the floating pipe 201 resets downward, eventually driving the blade 3004 to close, separating the upper and lower parts to facilitate subsequent removal of bottom sludge and secondary defluorination or desiliconization, preventing cross-contamination caused by the diffusion of sediment during precipitate removal.

[0066] Example 3

[0067] Reference Figures 1-8 This is the third embodiment of the present invention. This embodiment is based on the previous embodiment. Specifically, the bottom of the reaction tank 100 is provided with a slag discharge chamber 4001, the bottom of the reaction tank 100 is provided with a slag discharge wheel 4002, the slag discharge wheel 4002 is provided with an arc plate 4003 arranged in a circular array on the circumference, and the outer wall of the reaction tank 100 is provided with a slag discharge door 4004 that can be rotated open.

[0068] Among them, the arc plate 4003 is arc-shaped, and one end of the arc plate 4003 is arranged in a circular array on the slag discharge wheel 4002. The end near the inner wall of the reaction tank 100 is fixedly connected to the folding rod 3011, so that it is driven by the drive motor 400 to rotate.

[0069] Preferably, the bottom of the reaction vessel 100 is provided with a discharge port 4005, and the inner wall of the slag discharge chamber 4001 is fitted with a turntable 4006, which is provided with filter holes 4007.

[0070] In this embodiment, there are four discharge ports 4005, which are set at 90° apart. The turntable 4006 has filter holes 4007 of the same size and specifications, which can be completely overlapped. At the same time, the turntable 4006 rotates to fit against the bottom surface of the reaction vessel 100. After rotating a certain angle, the discharge ports 4005 and the filter holes 4007 are completely offset, setting the reaction vessel 100 to a closed state.

[0071] Furthermore, the thickness of the arc plate 4003 decreases from the center of the reaction vessel 100 to the outer wall. When the arc plate 4003 rotates counterclockwise, it scrapes the slag around the reaction vessel 100. At this time, the slag discharge door 4004 is opened to allow the slag to be discharged.

[0072] The filter 4007 is equipped with a screen to filter the falling slag mixture. After filtration, the liquid re-enters the feed inlet for secondary desiliconization and defluorination.

[0073] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape, and proportions of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of the invention. The order or sequence of any process or method steps may be changed or rearranged according to alternative embodiments. Any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structurally equivalent but also equivalent in structure. Other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments without departing from the scope of the invention. Therefore, the present invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended protection.

[0074] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the invention as currently considered, or those features that are not relevant to implementing the invention) may be omitted.

[0075] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0076] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the protection scope of the present invention.

Claims

1. A composite defluorination and desiliconization precipitation device for coking wastewater, characterized in that, include: A reaction vessel (100) is used to regulate the pH value of the internal coking wastewater; The water inlet assembly includes a water inlet (200) that extends through the bottom of the reaction tank (100). A floating pipe (201) is slidably disposed inside the water inlet (200). When coking wastewater flows in, the water inlet (200) pushes the floating pipe (201) upward to slide. When no coking wastewater flows in, the water inlet (200) returns to its original position downward and closes the water inlet (200). The homogenizing wheel (300) mixes the coking wastewater with the flocculant when the floating tube (201) floats up, and physically isolates the upper and lower layers when the floating tube (201) slides down and resets.

2. The composite defluorination and desiliconization precipitation device for coking wastewater as described in claim 1, characterized in that: A drive motor (400) is fixedly installed above the reaction tank (100). The output end of the drive motor (400) is connected to a dosing shaft (401) through a rotary joint. The dosing shaft (401) is used to drive the homogenizing wheel (300) to rotate. While the floating tube (201) slides upward, the water flow comes into contact with the dosing shaft (401). The dosing shaft (401) sprays out flocculant and mixes with the coking wastewater.

3. The composite defluorination and desiliconization precipitation device for coking wastewater as described in claim 2, characterized in that: The reaction vessel (100) is provided with a slag discharge chamber (4001) at the bottom, and a slag discharge wheel (4002) is provided at the bottom of the reaction vessel (100). The slag discharge wheel (4002) is provided with an arc-shaped plate (4003) arranged in a circular array on the circumference. The outer wall of the reaction vessel (100) is provided with a slag discharge door (4004) that can be rotated open.

4. The composite defluorination and desiliconization precipitation device for coking wastewater as described in claim 3, characterized in that: The inner wall of the inlet (200) is provided with a conical cavity (2001), and a sealing ball (2002) is movably provided in the conical cavity (2001). A connecting shaft (2003) is fixedly provided on the sealing ball (2002). The connecting shaft (2003) extends upward and is fixedly connected to the floating tube (201). A first elastic element (2004) is provided between the floating tube (201) and the inlet (200).

5. The composite defluorination and desiliconization precipitation device for coking wastewater as described in claim 4, characterized in that: The homogenizing wheel (300) is movably sleeved on the outer wall of the floating tube (201). The inner wall of the homogenizing wheel (300) is provided with a spiral groove (3001). The outer wall of the floating tube (201) is provided with a protrusion (3002). The protrusion (3002) is slidably disposed in the spiral groove (3001).

6. The composite defluorination and desiliconization precipitation device for coking wastewater as described in claim 5, characterized in that: The homogenizing wheel (300) has a rotating shaft (3003) on its outer wall, and blades (3004) are fitted on the outer wall of the rotating shaft (3003). When the blades (3004) are laid flat, they are assembled into a complete circle. An adjustment frame (3005) is also movably provided on the inner wall of the reaction vessel (100).

7. The composite defluorination and desiliconization precipitation device for coking wastewater as described in claim 6, characterized in that: A fixing ring (3006) is rotatably provided on the outer wall of the adjusting frame (3005). A swing arm (3007) is provided at one end of the rotating shaft (3003) that rotatably passes through the outside of the adjusting frame (3005). A waist-shaped groove (3008) is provided on the swing arm (3007). A protruding post (3009) is fixedly provided on the outer wall of the fixing ring (3006). The protruding post (3009) is slidably provided inside the waist-shaped groove (3008).

8. The composite defluorination and desiliconization precipitation device for coking wastewater as described in claim 7, characterized in that: The dosing shaft (401) is provided with a zigzag rod (3011) on its outer wall. The dosing shaft (401) drives the fixing ring (3006) and the homogenizing wheel (300) to rotate on the inner wall of the reaction vessel (100) through the zigzag rod (3011).

9. The composite defluorination and desiliconization precipitation device for coking wastewater as described in claim 8, characterized in that: The lower end of the dosing shaft (401) is provided with a pressure cap (3012). When the pressure cap (3012) is in the initial position, it blocks the flocculant from flowing down. When the floating pipe (201) discharges water, it squeezes the pressure cap (3012) upward, and the flocculant is sprayed out and mixed with the water flow.

10. The composite defluorination and desiliconization precipitation device for coking wastewater as described in claim 3, characterized in that: The bottom of the reaction vessel (100) is also provided with a discharge port (4005), and the inner wall of the slag discharge chamber (4001) is fitted with a turntable (4006) attached to the reaction vessel (100), and the turntable (4006) is provided with filter holes (4007).

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