Sodium sulfate mother liquor oxidation degradation and crystallization equipment for coking comprehensive sewage treatment

Abstract

The application discloses a sodium sulfate stock solution oxidation degradation and crystallization equipment for coking comprehensive sewage treatment, which comprises an oxidation shell, a filter shell and a crystallization equipment which are sequentially communicated, and a heating assembly and a feeding pipe are arranged on the oxidation shell; a sealing plate and a discharging hose are arranged in the oxidation shell, the sealing plate is provided with a liquid outlet hose, the discharging hose is communicated with a recovery box arranged at the bottom of the oxidation shell, a filter cartridge is arranged in the filter shell, the filter cartridge is communicated with the liquid outlet hose, a first gear and a driving mechanism are arranged in the oxidation shell, and a storage box and a conveying pipe are arranged on the side wall of the oxidation shell; the oxidation degradation equipment converts the gravity of the stock solution into the up-down movement of the sealing plate, and then converts the gravity into the power for adding the oxidant, so that the function of automatically adding the oxidant is realized, and the reaction efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to equipment for the oxidation, degradation, and crystallization of sodium sulfate stock solution for the comprehensive treatment of coking wastewater. Background Technology

[0002] In the deep processing of coal tar, phenolic organic matter is separated as sodium phenolate during alkaline washing-acid washing-alkaline washing or acid washing-alkaline washing processes, and then sent to the crude phenol refining process. During crude phenol refining, the sodium phenolate first removes oil, then reacts with sulfuric acid to slowly decompose, producing crude phenol through static separation and generating a large amount of sodium sulfate wastewater. Direct discharge of this wastewater would cause significant environmental harm; therefore, this sodium sulfate wastewater must undergo proper and effective treatment.

[0003] Industrial production employs wastewater treatment methods such as oxidative degradation, membrane recovery, and evaporation crystallization recovery. However, existing sodium sulfate oxidative degradation equipment lacks automatic quantitative addition of oxidants, and some equipment requires the precipitate to be reused multiple times before being collected, reducing filtration efficiency. Summary of the Invention

[0004] To address the aforementioned technical problems, this invention provides an oxidative degradation and crystallization device for sodium sulfate stock solution used in the comprehensive treatment of coking wastewater.

[0005] The technical solution of the present invention is: an oxidation degradation and crystallization device for sodium sulfate raw liquid in coking wastewater treatment, comprising an oxidation shell, a filter shell and a crystallization device connected in sequence, wherein the oxidation shell is provided with a heating component and a feed pipe;

[0006] The oxidation shell is equipped with a sealing plate that slides and seals with its inner wall, and a retractable discharge hose located on the upper surface of the sealing plate. The bottom surface of the sealing plate is equipped with a retractable liquid discharge hose. The discharge hose is connected to a recovery tank located at the bottom of the oxidation shell through a first connecting pipe.

[0007] The oxide shell located below the sealing plate is provided with a first gear. The first central shaft of the first gear is rotatably connected to the side wall of the oxide shell. The oxide shell is provided with a drive mechanism that drives the first central shaft to reciprocate through the up and down sliding of the sealing plate.

[0008] The side wall of the oxide shell is provided with a storage tank for storing oxidant and a conveying pipe. The inlet of the conveying pipe is connected to the outlet of the storage tank, and the outlet of the conveying pipe is connected to the interior of the oxide shell above the sealing plate.

[0009] The conveying pipe is equipped with a spiral conveying rod inside. One end of the spiral conveying rod passes through the conveying pipe and is equipped with a second gear. A third gear is provided on one side of the second gear, perpendicular to it and meshing with it. The second central shaft of the third gear is rotatably connected to a support rod provided on the side wall of the oxide shell. A first ratchet is fixedly sleeved on the second central shaft of the third gear. A first ratchet plate is provided horizontally below the first ratchet and meshes with it. The first ratchet plate passes through the side wall of the oxide shell and is fixedly connected to the first ratchet plate.

[0010] Furthermore, the oxidation shell is equipped with a stirring assembly, which includes a telescopic rod, a motor mounted on the top of the oxidation shell, and multiple stirring blades mounted on the telescopic end of the telescopic rod. The fixed end of the telescopic rod is fixedly connected to the motor, and the telescopic end of the telescopic rod is rotatably connected to the sealing plate.

[0011] Note: By setting the stirring rod as a telescopic rod, it can move synchronously with the up and down movement of the sealing plate, thus not affecting the stirring of the reactants.

[0012] Furthermore, the side wall of the oxide shell is provided with an auxiliary box for loading liquid or gas. The bottom of the auxiliary box is connected to the inside of the oxide shell through a sixth connecting pipe. The bottom of the auxiliary box is provided with a blocking plate to block the sixth connecting pipe. The blocking plate passes through the sixth connecting pipe through a sliding rod and is slidably and sealingly connected to the sixth connecting pipe.

[0013] The thickness of the first ratchet is greater than the thickness of the first ratchet plate. A third ratchet plate is vertically provided on one side of the first ratchet to engage with it. The top of the third ratchet plate is fixedly connected to the slide bar, and the bottom of the third ratchet plate is fixedly connected to the elastic element provided on the side wall of the oxide shell.

[0014] Note: An auxiliary tank is provided so that when liquid or gas needs to be added, the second ratchet can be rotated to assist in the addition, and to a certain extent, it plays a role in the quantitative addition of solid oxidant.

[0015] Furthermore, a first baffle is provided at the inlet of the feed pipe, and the first baffle is provided with multiple through holes. A second baffle is provided on the side wall of the oxide shell, penetrating the side wall of the oxide shell and rotatably connected to the feed pipe. The second baffle is provided with docking holes that correspond one-to-one with the multiple through holes when rotating, and a fourth gear is sleeved on the second baffle located outside the oxide shell.

[0016] The first central shaft passes through the oxide shell and is provided with a second ratchet. A splicing plate is provided on the side wall of the oxide shell and is slidably connected thereto. The splicing plate is formed by connecting the second ratchet plate, which is driven by the ratchet on one side meshing with the second ratchet, and the second tooth plate, which is driven by the fourth gear, end to end.

[0017] Explanation: By setting the first and second baffles, the opening and closing of the discharge pipe can be controlled by rotating the second baffle or the third gear, which is simple to operate; by the second ratchet meshing with the second ratchet plate, when the sealing plate is squeezed down by the liquid, the fourth gear can be rotated, which will gradually rotate and close the discharge pipe, thereby quantitatively controlling the amount of original liquid for each oxidation degradation.

[0018] Furthermore, the filter housing is provided with a filter cartridge inside. One end of the filter cartridge is provided with a first rotating tube fixedly connected to it. The first rotating tube is connected to the liquid outlet hose through a third connecting tube that is rotatably and sealingly sleeved with it. The first rotating tube is connected to the first central shaft by a belt drive. The other end of the filter cartridge is provided with a second rotating tube that is rotatably and sealingly connected to it. The bottom of the filter housing is connected to the crystallization equipment through the second connecting tube.

[0019] Explanation: When transferring liquid, the sealing plate moves upward due to the decrease in gravity, the first gear rotates in the opposite direction and drives the first rotating tube and filter cartridge to rotate synchronously, thereby improving filtration efficiency.

[0020] Furthermore, the filter housing has a structure that is narrow at the top and wide at the bottom. Inside the filter housing, there is a water receiving plate that is slidably and sealingly connected to the inner wall of the narrow part of the filter housing. The water receiving plate is fixedly connected to the top of the filter housing through a first liquid bladder rod, and the water receiving plate is fixedly connected to the bottom of the second connecting pipe through a second liquid bladder rod. The first liquid bladder rod is connected to the second liquid bladder rod through a fourth connecting pipe.

[0021] An impeller is provided inside the fourth connecting pipe. The third central shaft of the impeller passes through the fourth connecting pipe and is provided with a sixth gear. A fifth gear is provided on one side of the sixth gear, perpendicular to it and meshing with it. The fourth central shaft of the fifth gear is rotatably connected to the side wall of the oxide shell. A third ratchet is sleeved on the fourth central shaft, which meshes with the ratchet teeth on the other side of the second ratchet plate. The ratchet teeth on both sides of the second ratchet plate are arranged in opposite directions.

[0022] Explanation: When transferring filtered liquid, the process of the water receiving plate being squeezed and then rebounding drives the impeller to drive the fourth gear to rotate, thereby driving the third ratchet to mesh with the ratchet. When the water receiving plate rebounds, indicating that the liquid discharge is gradually completed, the feed pipe is automatically driven to open for the next oxidation and degradation.

[0023] Furthermore, the second rotating tube is connected to the recycling box in sequence through the sliding tube, the connecting hose, and the fifth connecting tube, and the outlet of the second rotating tube is provided with a discharge hole and a hard film for blocking the discharge hole, and the sliding tube is provided with a suction tube for sliding through the hard film.

[0024] The sliding tube is slidably and sealingly connected to the second rotating tube, and the sliding tube is provided with a first airbag rod that is fixedly connected to the side wall of the filter housing; the top of the second toothed plate is fixedly connected to the top of the oxidation housing through the second airbag rod, and the second airbag rod is connected to the first airbag rod through the air transmission tube.

[0025] Explanation: When the feed pipe is closed, the first rotating pipe drives the filter cartridge to rotate through the rotation of the first central shaft, which speeds up filtration and closes the second rotating pipe; when the feed pipe is open, the second rotating pipe is opened to recover the precipitate; this automatically adjusts the filter cartridge's filtration and recovery status.

[0026] Furthermore, both the liquid outlet hose and the material outlet hose are equipped with a switching valve, and a touch sensor for sensing the position of the sealing plate is provided on the side wall of the oxide shell located at the highest point of the sealing plate. The oxide shell is equipped with a controller that is electrically connected to both the switching valve and the touch sensor.

[0027] Instructions: When the switch valve on the liquid discharge hose is closed after liquid discharge is complete, the discharge hose is opened to collect the sediment. After the sediment is completely absorbed, the sealing plate gradually rises back to its initial position, and the discharge hose is closed by controlling the touch sensor. Thus, the opening and closing status of the discharge hose is automatically controlled according to the solid-liquid separation status.

[0028] Furthermore, the heating component is an electric heater disposed on the inner wall of the oxide shell; the crystallization device is an MVR evaporator.

[0029] Description: The electric heater provides stable and uniform heat, resulting in a more even temperature distribution in the heated area; it can quickly raise the indoor temperature, saving time and energy; it is equipped with multiple safety protection measures, such as over-temperature protection, short-circuit protection, and leakage protection; the energy consumption of MVR evaporators is typically one-fifth to two-fifths of that of traditional multi-effect evaporators, with significant environmental protection and energy-saving effects and high thermal efficiency.

[0030] Furthermore, the driving mechanism includes a first toothed plate slidably connected to the bottom of the oxide shell and a limiting block fixedly connected to the inner wall of the oxide shell for limiting the sliding of the sealing plate. The first toothed plate meshes with a first gear for transmission. The bottom of the sealing plate is provided with a driving rod that passes through the limiting block. The first central shaft of the first gear is rotatably connected to the side wall of the oxide shell. A spring is sleeved on the driving rod located between the sealing plate and the limiting block. A transmission rod is fixedly sleeved on the first central shaft. The transmission rod is provided with a guide groove for sliding connection with the driving rod.

[0031] Explanation: The up-and-down sliding of the sealing plate is converted into the driving rod pushing the transmission rod, thereby driving the transmission rod to drive the first central shaft and the first gear to reciprocate. The structure is simple.

[0032] The beneficial effects of this invention are:

[0033] (1) The oxidative degradation device of the present invention converts the gravity of the original liquid into the up-and-down movement of the sealing plate, thereby converting the up-and-down movement into the rotational power of the screw conveyor, realizing the automatic and quantitative addition of the oxidant, and simultaneously driving the auxiliary liquid or gaseous reagent to be added automatically and quantitatively, thereby improving the reaction efficiency.

[0034] (2) During the oxidation and degradation process, the device of the present invention automatically controls the closing of the feed pipe by the amount of raw liquid entering the pipe, and performs filter cartridge filtration after completion. The dynamic changes of the water receiving plate show the filter cartridge filtration situation, and then automatically controls the opening of the feed pipe. At the same time as opening the feed pipe, the state of the filter cartridge is reversed, that is, the filter cartridge is changed from the filtration state to the precipitate recovery state, so as to realize the recovery of precipitate after each filtration and reduce the impact on the next filtration. Attached Figure Description

[0035] Figure 1 This is an overall appearance view of the device according to Embodiment 1 of the present invention;

[0036] Figure 2 This is a side view of the overall appearance of the device according to Embodiment 1 of the present invention;

[0037] Figure 3 This is a diagram of the internal structure of the oxide shell of the device in Embodiment 1 of the present invention;

[0038] Figure 4 This is a connection diagram of the third connecting pipe in Embodiment 1 of the device of the present invention;

[0039] Figure 5 This is a diagram of the internal structure of the conveying pipe of the device of the present invention;

[0040] Figure 6 This is a structural diagram of the internal structure of the filter housing in Embodiment 1 of the present invention;

[0041] Figure 7 This is a structural diagram of the feed pipe of the device of the present invention;

[0042] Figure 8 This is a structural diagram of the second baffle of the device of the present invention;

[0043] Figure 9 This is an overall appearance view of the device in Embodiment 2 of the present invention;

[0044] Figure 10 This is a structural diagram of the internal structure of the filter housing in Embodiment 2 of the present invention;

[0045] Figure 11 This is a diagram showing the internal structure of the second rotating tube in Embodiment 2 of the present invention;

[0046] Figure 12This is a diagram showing the internal structure of the sliding tube in Embodiment 2 of the present invention;

[0047] Figure 13 This is a structural diagram of the auxiliary box of embodiment 2 of the device of the present invention;

[0048] Among them, 1-Oxidation shell, 11-Sealing plate, 111-Liquid outlet hose, 112-Discharge hose, 113-Third connecting pipe, 114-First connecting pipe, 12-Feed pipe, 121-First baffle, 122-Through hole, 123-Fourth gear, 124-Matching hole, 125-Second baffle, 13-Stirring rod, 131-Motor, 132-Stirring blade, 14-Storage tank, 141-Conveying pipe, 142-Second gear, 143-Third gear, 144-First ratchet, 145-Second central shaft, 146-First ratchet plate, 147-Screw conveying rod, 15-Touch sensor, 16-Drive rod, 161-Limiting block, 162-Second ratchet, 163-Transmission rod, 164-First gear, 165-First central shaft, 166-First toothed plate, 17-Electric heater, 18 - Second toothed plate, 181-Second ratchet plate, 182-Second airbag rod, 183-Gas transmission pipe, 184-Ratchet, 185-First airbag rod, 19-Auxiliary box, 191-Sixth connecting pipe, 192-Blocking plate, 193-Slide rod, 194-Third ratchet plate, 2-Filter housing, 21-Filter cartridge, 22-First rotating tube, 23-Second rotating tube, 231-Hard sheet membrane, 24-First liquid bladder rod, 241-Second liquid bladder rod, 242-First liquid bladder rod, 243-Fourth connecting pipe, 244-Impeller, 245-Third central shaft, 246-Sixth gear, 247-Fifth gear, 248-Fourth central shaft, 249-Third ratchet, 3-Crystallization equipment, 31-Second connecting pipe, 4-Recovery box, 41-Fifth connecting pipe, 42-Connecting hose, 43-Sliding tube, 431-Suction tube. Detailed Implementation

[0049] The present invention will now be described in more detail with reference to specific embodiments, so as to better demonstrate the advantages of the present invention.

[0050] Example 1

[0051] Equipment for the oxidation, degradation, and crystallization of sodium sulfate stock solution used in the comprehensive treatment of coking wastewater, such as Figure 1 and Figure 3 As shown, the device includes an oxidation shell 1, a filter shell 2, and a crystallization device 3 connected in sequence. The crystallization device 3 is an MVR evaporator. The oxidation shell 1 is equipped with a heating component, which is an electric heater 17 installed on the inner wall of the oxidation shell 1. The side wall of the oxidation shell 1 is equipped with a feed pipe 12. Both the MVR evaporator and the electric heater 17 are commercially available devices.

[0052] like Figure 2 and Figure 3 As shown, the oxidation shell 1 is provided with a sealing plate 11 that is slidably and sealingly connected to its inner wall and a retractable discharge hose 112 located on the upper surface of the sealing plate 11. The bottom surface of the sealing plate 11 is provided with a retractable liquid discharge hose 111. The discharge hose 112 is connected to the recovery box 4 located at the bottom of the oxidation shell 1 through a first connecting pipe 114.

[0053] like Figure 2 and Figure 3 As shown, both the liquid outlet hose 111 and the discharge hose 112 are equipped with switching valves, and a touch sensor 15 for sensing the position of the sealing plate 11 is provided on the side wall of the oxide shell 1 located at the highest point of the sealing plate 11. Inside the side wall of the oxide shell 1, there is a controller that is electrically connected to both the switching valve and the touch sensor 15. The switching valve, the controller, and the touch sensor 15 are all commercially available devices.

[0054] like Figure 2 and Figure 3 As shown, the oxidation shell 1 is equipped with a stirring assembly, which includes a telescopic rod 13, a motor 131 mounted on the top of the oxidation shell 1, and a plurality of stirring blades 132 mounted on the telescopic end of the telescopic rod 13. The fixed end of the telescopic rod 13 is fixedly connected to the motor 131, and the telescopic end of the telescopic rod 13 is rotatably connected to the sealing plate 11. The motor 131 is a commercially available rotary motor.

[0055] like Figure 2 and Figure 3 As shown, a first gear 164 is provided inside the oxide shell 1 located below the sealing plate 11. The first central shaft 165 of the first gear 164 is rotatably connected to the side wall of the oxide shell 1. The oxide shell 1 is provided with a drive mechanism that drives the first central shaft 165 to reciprocate through the up and down sliding of the sealing plate 11.

[0056] The driving mechanism includes a first toothed plate 166 slidably connected to the bottom of the oxide shell 1 and a limiting block 161 fixedly connected to the inner wall of the oxide shell 1 for limiting the sliding of the sealing plate 11. It can be understood that the limiting block 161 is also used to protect the recycling box 4, the transmission rod 163 and the first gear 164, and to prevent the sealing plate from excessively moving and damaging the recycling box 4, the transmission rod 163 and the first gear 164. The first toothed plate 166 meshes with the first gear 164 for transmission. The bottom of the sealing plate 11 is provided with a driving rod 16 that passes through the limiting block 161. A spring is sleeved on the driving rod 16 located between the sealing plate 11 and the limiting block 161. A transmission rod 163 is fixedly sleeved on the first central shaft 165. The transmission rod 163 is provided with a guide groove for sliding connection with the driving rod 16.

[0057] like Figure 7 and Figure 8 As shown, a first baffle 121 is provided at the inlet of the feed pipe 12. The first baffle 121 is provided with a plurality of through holes 122. A second baffle 125 is provided on the inner wall of the oxide shell 1, which penetrates the side wall of the oxide shell 1 and is rotatably connected to the feed pipe 12. The second baffle 125 is provided with docking holes 124 that correspond to and overlap with the plurality of through holes 122 when rotating. A fourth gear 123 is sleeved on the second baffle 124 located outside the oxide shell 1.

[0058] like Figure 1 and Figure 3 As shown, the first central shaft 165 passes through the oxide shell 1 and is provided with a second ratchet 162. The side wall of the oxide shell 1 is provided with a splicing plate that is slidably connected to it. The splicing plate is formed by connecting the second ratchet plate 181, which is meshed with the second ratchet 162 on one side, and the second tooth plate 18, which is meshed with the fourth gear 123, end to end.

[0059] like Figure 1 , Figure 2 , Figure 4 and Figure 6 As shown, the filter housing 2 is provided with a filter cylinder 21 inside. One end of the filter cylinder 21 is provided with a first rotating tube 22 fixedly connected to it. The first rotating tube 22 is connected to the liquid outlet hose 111 through a third connecting tube 113 that is rotatably and sealingly connected to it. The first rotating tube 22 is connected to the first central shaft 165 through a transmission belt. The other end of the filter cylinder 21 is provided with a second rotating tube 23 that is rotatably and sealingly connected to it. The bottom of the filter housing 2 is connected to the crystallization device 3 through a second connecting tube 31.

[0060] like Figure 2 As shown, the side wall of the oxide shell 1 is provided with a storage tank 14 for storing the oxidant ammonium persulfate and a conveying pipe 141. The inlet of the conveying pipe 141 is connected to the outlet of the storage tank 14, and the outlet of the conveying pipe 141 is connected to the interior of the oxide shell 1.

[0061] like Figure 2 and Figure 5 As shown, a spiral conveying rod 147 is provided inside the conveying pipe 141. One end of the spiral conveying rod 147 passes through the conveying pipe 141 and is provided with a second gear 142. A third gear 143 is provided on one side of the second gear 142, perpendicular to it and meshing with it. The second central shaft 145 of the third gear 143 is rotatably connected to a support rod provided on the side wall of the oxide shell 1. A first ratchet 144 is fixedly sleeved on the second central shaft 145 of the third gear 143. A first ratchet plate 146 is provided horizontally below the first ratchet 144 and meshes with it. The first ratchet plate 146 passes through the side wall of the oxide shell 1 and is fixedly connected to the first toothed plate 166.

[0062] The working principle of the above equipment is as follows: After sodium sulfate stock solution is introduced into the feed pipe 12, the gravity of the sodium sulfate stock solution causes the sealing plate 11 to move down. When it moves down, the first gear 164 rotates forward, thereby driving the first toothed plate 166 to move to the left, which causes the first ratchet 144 to drive the second central shaft 145 to rotate, thereby driving the spiral conveying rod 147 on the second gear 142 to rotate through the third gear 143, and thus the oxidant is spirally conveyed into the oxidation shell 1.

[0063] As the sodium sulfate stock solution is introduced, the sealing plate 11 moves down, causing the second ratchet 162 to rotate synchronously, thereby driving the second ratchet plate 181 to move the second toothed plate 18 down, causing the fourth gear 123 to rotate forward and gradually close the feed pipe 12, controlling the quantitative introduction of the sodium sulfate stock solution. After the sodium sulfate stock solution is introduced, the conveying pipe 141 also stops operating.

[0064] After standing for a period of time, solid and liquid separation occurs. First, the discharge hose 111 is opened to transfer the liquid to the filter cartridge 21. As the liquid decreases and the weight drops, the sealing plate 11 moves upward. During the upward movement, the first gear 164 reverses, driving the first rotating tube 22 and the filter cartridge 21 to rotate synchronously, accelerating filtration. At this time, the feed pipe 12 remains closed. When the sealing plate 11 stops moving upward, that is, when there is no more liquid flowing in the third connecting pipe 113, the liquid discharge hose 111 is closed and the discharge hose 112 is opened to draw the sediment into the recovery tank 3. The sealing plate 11 gradually moves upward to return to its initial highest point. Under the action of the touch sensor 15, the discharge hose 112 is closed.

[0065] Example 2

[0066] The difference between this embodiment and Embodiment 1 is that, Figure 9 and Figure 13 As shown, the side wall of the oxide shell 1 is provided with an auxiliary tank 19 for loading liquid ferric chloride. The bottom of the auxiliary tank 19 is connected to the inside of the oxide shell 1 through a sixth connecting pipe 191. The bottom of the auxiliary tank 19 is provided with a blocking plate 192 to block the sixth connecting pipe 191. The blocking plate 192 passes through the sixth connecting pipe 191 through a sliding rod 193 and is slidably and sealingly connected to the sixth connecting pipe 191.

[0067] like Figure 9 As shown, the thickness of the first ratchet 144 is 5 cm greater than the thickness of the first ratchet plate 146. A third ratchet plate 194 is vertically provided on one side of the first ratchet 144 to mesh with it. The top of the third ratchet plate 194 is fixedly connected to the slide bar 193, and the bottom of the third ratchet plate 194 is fixedly connected to the elastic element provided on the side wall of the oxide shell 1.

[0068] like Figure 9 and Figure 10As shown, the filter housing 2 has a structure that is narrow at the top and wide at the bottom. Inside the filter housing 2, there is a water receiving plate 24 that is slidably and sealingly connected to the inner wall of the narrow part of the filter housing 2. The water receiving plate 24 is fixedly connected to the top of the filter housing 2 through a first liquid bladder rod 242. The water receiving plate 24 is fixedly connected to the bottom of the second connecting pipe 31 through a second liquid bladder rod 241. The first liquid bladder rod 242 is connected to the second liquid bladder rod 241 through a fourth connecting pipe 243.

[0069] like Figure 9 and Figure 10 As shown, the fourth connecting pipe 243 is provided with an impeller 244 inside. The third central shaft 245 of the impeller 244 passes through the fourth connecting pipe 243 and is provided with a sixth gear 246. A fifth gear 247 is provided on one side of the sixth gear 246, which is perpendicular to it and meshes with it. The fourth central shaft 248 of the fifth gear 247 is rotatably connected to the side wall of the oxide shell 1. A third ratchet 249 is sleeved on the fourth central shaft 248 and meshes with the ratchet 184 on the other side of the second ratchet plate 181. The ratchet 184 on both sides of the second ratchet plate 181 are arranged in opposite directions.

[0070] like Figure 9 , Figure 11 and Figure 12 As shown, the second rotating tube 23 is connected to the recycling box 4 in sequence through the sliding tube 43, the connecting hose 42, and the fifth connecting tube 41. The second rotating tube 23 is provided with a discharge hole and a hard film 231 for blocking the discharge hole. The sliding tube 43 is provided with a suction tube 431 for sliding through the hard film 231.

[0071] like Figure 9 As shown, the sliding tube 43 is slidably and sealingly connected to the second rotating tube 23, and the sliding tube 43 is provided with a first airbag rod 185 fixedly connected to the side wall of the filter housing 2; the bottom of the second ratchet plate 181 is fixedly connected to the bottom of the oxide housing 1 through the second airbag rod 182, and the second airbag rod 182 is connected to the first airbag rod 185 through the air transmission tube 183.

[0072] The working principle of this embodiment differs from that of embodiment 1 in that, while the oxidant is being conveyed by the spiral, the first ratchet 144 simultaneously drives the second ratchet plate 194 to move upward, thereby opening the connection between the auxiliary box 19 and the sixth connecting pipe 191 and introducing the auxiliary agent ferric chloride.

[0073] As the water filtered out of the filter cartridge 21 gradually increases on the water receiving plate 24, the water receiving plate 24 first moves down to allow the liquid to flow into the second connecting pipe 31. After the water in the filter cartridge 21 is gradually filtered out, the water receiving plate 24 moves up again, thereby causing liquid to flow in the fourth connecting pipe 243. This causes the impeller 244 to drive the third ratchet 248 to rotate through the fourth gear 246 and the fifth gear 247, thereby causing the second ratchet plate 181 to move up. Without affecting the second ratchet 162, the fourth gear 123 reverses, thereby opening the feed pipe 12 for the next wave of oxidation and degradation.

[0074] At the same time, the second toothed plate 18 moves upward and stretches the second airbag rod 182, causing the first airbag rod 185 to contract, which in turn drives the sliding tube 43 to move closer to the filter housing 2, so that the suction tube 431 penetrates the hard film 231 and sucks up the sediment and recovers it into the recovery box 4.

Claims

1. Equipment for the oxidative degradation and crystallization of sodium sulfate stock solution in the comprehensive treatment of coking wastewater, characterized in that, It includes an oxide shell (1), a filter shell (2) and a crystallization device (3) connected in sequence. The oxide shell (1) is equipped with a heating component and a feed pipe (12). The oxidation shell (1) is provided with a sealing plate (11) that is slidably and sealingly connected to its inner wall and a retractable discharge hose (112) located on the upper surface of the sealing plate (11). The bottom surface of the sealing plate (11) is provided with a retractable liquid discharge hose (111). The discharge hose (112) is connected to the recovery box (4) located at the bottom of the oxidation shell (1) through a first connecting pipe (114). The oxide shell (1) located below the sealing plate (11) is provided with a first gear (164), the first central shaft (165) of the first gear (164) is rotatably connected to the side wall of the oxide shell (1), and the oxide shell (1) is provided with a drive mechanism that drives the first central shaft (165) to reciprocate through the up and down sliding of the sealing plate (11). The side wall of the oxide shell (1) is provided with a storage tank (14) for storing oxidant and a conveying pipe (141). The inlet of the conveying pipe (141) is connected to the outlet of the storage tank (14), and the outlet of the conveying pipe (141) is connected to the interior of the oxide shell (1) above the sealing plate (11). The conveying pipe (141) is provided with a spiral conveying rod (147) inside. One end of the spiral conveying rod (147) passes through the conveying pipe (141) and is provided with a second gear (142). A third gear (143) is provided on one side of the second gear (142) and is perpendicular to it and meshes with it. The second central shaft (145) of the third gear (143) is rotatably connected to the support rod provided on the side wall of the oxide shell (1). A first ratchet (144) is fixedly sleeved on the second central shaft (145) of the third gear (143). A first ratchet plate (146) is provided horizontally below the first ratchet (144) and meshes with it. The first ratchet plate (146) passes through the side wall of the oxide shell (1) and is fixedly connected to the first tooth plate (166). The driving mechanism includes a first toothed plate (166) slidably connected to the bottom of the oxide shell (1) and a limiting block (161) fixedly connected to the inner wall of the oxide shell (1) for limiting the sliding of the sealing plate (11). The first toothed plate (166) meshes with the first gear (164) for transmission. The bottom of the sealing plate (11) is provided with a driving rod (16) that passes through the limiting block (161). A spring is sleeved on the driving rod (16) located between the sealing plate (11) and the limiting block (161). A transmission rod (163) is fixedly sleeved on the first central shaft (165). The transmission rod (163) is provided with a guide groove for sliding connection with the driving rod (16).

2. The sodium sulfate stock solution oxidation degradation and crystallization equipment for integrated coking wastewater treatment according to claim 1, characterized in that, The oxide shell (1) is equipped with a stirring assembly, which includes a telescopic rod (13), a motor (131) set on the top of the oxide shell (1), and a plurality of stirring blades (132) set on the telescopic end of the telescopic rod (13). The fixed end of the telescopic rod (13) is fixedly connected to the motor (131), and the telescopic end of the telescopic rod (13) is rotatably connected to the sealing plate (11).

3. The sodium sulfate stock solution oxidation degradation and crystallization equipment for integrated coking wastewater treatment according to claim 1, characterized in that, The side wall of the oxide shell (1) is provided with an auxiliary box (19) for loading liquid or gas. The bottom of the auxiliary box (19) is connected to the inside of the oxide shell (1) through a sixth connecting pipe (191). The bottom of the auxiliary box (19) is provided with a blocking plate (192) to block the sixth connecting pipe (191). The blocking plate (192) passes through the sixth connecting pipe (191) through a sliding rod (193) and is slidably and sealed to the sixth connecting pipe (191). The thickness of the first ratchet (144) is greater than the thickness of the first ratchet plate (146). A third ratchet plate (194) is vertically provided on one side of the first ratchet (144) for meshing and transmission. The top of the third ratchet plate (194) is fixedly connected to the slide bar (193), and the bottom of the third ratchet plate (194) is fixedly connected to the elastic element provided on the side wall of the oxide shell (1).

4. The sodium sulfate stock solution oxidation degradation and crystallization equipment for integrated coking wastewater treatment according to claim 1, characterized in that, The feed pipe (12) has a first baffle (121) at its opening. The first baffle (121) has multiple through holes (122). The oxide shell (1) has a second baffle (125) that penetrates the side wall of the oxide shell (1) and is rotatably connected to the feed pipe (12). The second baffle (125) has a docking hole (124) that corresponds to and overlaps with the multiple through holes (122) when rotating. A fourth gear (123) is fitted on the second baffle (125) located outside the oxide shell (1). The first central shaft (165) passes through the oxide shell (1) and is provided with a second ratchet (162). The side wall of the oxide shell (1) is provided with a splicing plate that is slidably connected to it. The splicing plate is formed by connecting the second ratchet plate (181) with the second ratchet (162) meshing with the second ratchet (184) on one side and the second tooth plate (18) with the fourth gear (123) end to end.

5. The sodium sulfate stock solution oxidation degradation and crystallization equipment for integrated coking wastewater treatment according to claim 4, characterized in that, The filter housing (2) is provided with a filter cylinder (21) inside. One end of the filter cylinder (21) is provided with a first rotating tube (22) fixedly connected to it. The first rotating tube (22) is connected to the liquid outlet hose (111) through a third connecting tube (113) which is rotated and sealed with it. The first rotating tube (22) is connected to the first central shaft (165) through a belt drive. The other end of the filter cylinder (21) is provided with a second rotating tube (23) which is rotated and sealed with it. The bottom of the filter housing (2) is connected to the crystallization device (3) through a second connecting tube (31).

6. The sodium sulfate stock solution oxidation degradation and crystallization equipment for integrated coking wastewater treatment according to claim 5, characterized in that, The filter housing (2) has a structure that is narrow at the top and wide at the bottom. Inside the filter housing (2), there is a water receiving plate (24) that is slidably and sealingly connected to the inner wall of the narrow part of the filter housing (2). The water receiving plate (24) is fixedly connected to the top of the filter housing (2) through the first liquid bladder rod (242). The water receiving plate (24) is fixedly connected to the bottom of the second connecting pipe (31) through the second liquid bladder rod (241). The first liquid bladder rod (242) is connected to the second liquid bladder rod (241) through the fourth connecting pipe (243). The fourth connecting pipe (243) is equipped with an impeller (244). The third central shaft (245) of the impeller (244) passes through the fourth connecting pipe (243) and is equipped with a sixth gear (246). A fifth gear (247) is provided on one side of the sixth gear (246) and is perpendicular to it and meshes with it. The fourth central shaft (248) of the fifth gear (247) is rotatably connected to the side wall of the oxide shell (1). A third ratchet (249) is sleeved on the fourth central shaft (248) and meshes with the ratchet (184) on the other side of the second ratchet plate (181). The ratchet (184) on both sides of the second ratchet plate (181) is arranged in opposite directions.

7. The sodium sulfate stock solution oxidation degradation and crystallization equipment for integrated coking wastewater treatment according to claim 6, characterized in that, The second rotating tube (23) is connected to the recycling box (4) in sequence through the sliding tube (43), the connecting hose (42), and the fifth connecting tube (41). The second rotating tube (23) has a discharge hole and a hard film (231) for blocking the discharge hole. The sliding tube (43) has a suction tube (431) for sliding through the hard film (231). The sliding tube (43) is slidably sealed with the second rotating tube (23), and the sliding tube (43) is provided with a first airbag rod (185) fixedly connected to the side wall of the filter housing (2); the bottom of the second ratchet plate (181) is fixedly connected to the bottom of the oxide housing (1) through the second airbag rod (182), and the second airbag rod (182) is connected to the first airbag rod (185) through the air transmission tube (183).

8. The sodium sulfate stock solution oxidation degradation and crystallization equipment for integrated coking wastewater treatment according to claim 1, characterized in that, Both the liquid outlet hose (111) and the discharge hose (112) are equipped with switching valves, and the side wall of the oxide shell (1) located at the highest point of the sealing plate (11) is equipped with a touch sensor (15) that senses the position of the sealing plate (11). The oxide shell (1) is equipped with a controller that is electrically connected to both the switching valve and the touch sensor (15).

9. The sodium sulfate stock solution oxidation degradation and crystallization equipment for integrated coking wastewater treatment according to claim 1, characterized in that, The heating component is an electric heater (17) installed on the inner wall of the oxide shell (1); the crystallization device (3) is an MVR evaporator.

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