Wastewater treatment device and method based on refinery catalytic cracking desulfurization and dust removal system

Abstract

The present invention discloses a wastewater treatment device and method based on a refinery catalytic cracking desulfurization and dust removal system, and relates to the technical field of wastewater treatment. The present invention includes a treatment tank, which is used to collect wastewater generated in the catalytic cracking desulfurization and dust removal system, and also includes: a coarse filtration unit, including a filter assembly and an extrusion assembly, wherein the filter assembly is provided with a filter screen for filtering wastewater, and the extrusion assembly is provided with an extrusion cover plate; a fine filtration unit, including a flocculation assembly and a separation assembly, wherein the flocculation assembly is provided with a separation cylinder, a material injection mechanism, and a driving mechanism for collecting wastewater. The advantage is that the present invention can not only filter out large-volume impurities in wastewater, but also achieve flocculation, precipitation, separation, and purification of dissolved impurities in wastewater, thereby achieving multi-stage purification of wastewater, and after filtration, pressurized squeezing and centrifugal water removal are used to fully remove the wastewater accumulated in the impurities, so that the treatment of wastewater is more thorough.

Description

Technical Field

[0001] The present invention relates to the technical field of wastewater treatment, and in particular to a wastewater treatment device and method based on a refinery catalytic cracking desulfurization and dust removal system. Background Art

[0002] Wet desulfurization in catalytic cracking in refineries involves transferring SOx from flue gas into water to form high-salt wastewater. At the same time, the catalyst particles produced during desulfurization also enter the saline wastewater. To improve the environmental friendliness of the wastewater and ensure it meets emission standards, wastewater treatment equipment is usually used to treat the wastewater to ensure that it meets emission standards.

[0003] Existing wastewater treatment devices use a variety of methods to achieve wastewater treatment, such as the fully automated lime desulfurization catalyst dust removal wastewater treatment and purification equipment with publication number CN217757101U, which specifically relates to the field of wastewater treatment technology. The equipment includes a base, a treatment mechanism is provided on the top of the base, and the treatment mechanism includes a lime tank provided on the top of the base. A filter press is provided on one side of the lime tank and located on the top of the base. A motor is provided on the top of the filter press.

[0004] When filtering wastewater, existing devices usually only use filtering to remove impurities in the wastewater. This filtering method will result in the wastewater accumulated in the impurities cannot be removed, that is, there is still a lot of wastewater in the filtered impurities, affecting the subsequent treatment effect. For example, the above-mentioned referenced prior art, the device only uses a filter to filter impurities in the wastewater. This filtering method can only filter out large-volume impurities in the wastewater, but cannot remove small-volume or dissolved impurities in the wastewater. The treatment effect is poor and graded treatment cannot be achieved. At the same time, a lot of wastewater will still accumulate in the impurities and cannot be separated, and a more thorough solid-liquid separation cannot be achieved, which has certain limitations.

[0005] Therefore, it is urgent to design a wastewater treatment device and method based on the refinery catalytic cracking desulfurization and dust removal system to solve the above problems. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention provides a wastewater treatment device and method based on a refinery catalytic cracking desulfurization and dust removal system, which solves the problems raised in the above background technology.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions: a wastewater treatment device based on a refinery catalytic cracking desulfurization and dust removal system includes a treatment tank for collecting wastewater generated in the catalytic cracking desulfurization and dust removal system, and further includes:

[0008] The coarse filtration unit is arranged in the treatment tank and includes a filter assembly and an extrusion assembly, wherein the filter assembly is provided with a filter screen for filtering wastewater, and the extrusion assembly is provided with an extrusion cover plate. The extrusion assembly drives the extrusion cover plate to move downward to squeeze the waste residue on the filter screen, thereby squeezing out the wastewater in the waste residue;

[0009] The fine filtration unit is arranged on the side of the coarse filtration unit and includes a flocculation component and a separation component. The flocculation component is provided with a separation cylinder for collecting wastewater, an injection mechanism and a driving mechanism. The flocculation purifier is quantitatively injected into the wastewater in the separation cylinder through the injection mechanism to achieve flocculation and slag removal. The separation component is provided with a separation mesh plate. The separation cylinder is driven to rotate by the driving mechanism and cooperates with the separation of the separation mesh plate to achieve the separation of flocculated waste slag and wastewater.

[0010] Preferably, the lower portion of the treatment tank is provided with support legs for supporting the treatment tank, and the support of the support legs improves the stability of the treatment tank;

[0011] A control console is provided on the side of the treatment tank, and the operation and opening and closing states of the coarse filtration unit and the fine filtration unit are controlled by the control console to realize the automatic treatment of wastewater.

[0012] Preferably, the filter assembly includes a filter box fixedly installed in the treatment tank, and the filter box is fixedly connected to a wastewater inlet pipe for collecting wastewater, a plurality of limit slides are fixedly installed in the filter box, and a lifting platform is slidably installed on the plurality of limit slides, and a filter mesh plate for filtering large-volume particulate matter in the wastewater is fixedly installed on the lifting platform.

[0013] Preferably, the extrusion assembly includes two hydraulic drive rods fixedly installed in the filter box, and an extrusion cover plate is fixedly installed on the driving ends of the two hydraulic drive rods, and the extrusion cover plate cooperates with the filter mesh plate, and two return springs are fixedly installed between the lifting platform and the bottom of the filter box.

[0014] Preferably, the flocculation assembly further comprises a collecting cylinder fixedly mounted in the treatment tank, and a separation cylinder rotatably mounted in the collecting cylinder, a water pipe for conducting filtered wastewater is fixedly connected between the filter box and the collecting cylinder, and the water pipe is rotatably connected to the separation cylinder.

[0015] Preferably, the driving mechanism includes a servo motor fixedly installed in the processing tank, and a driving roller is fixedly installed on the driving end of the servo motor, a linkage roller is fixedly installed on the separation cylinder, and the linkage roller is rotatably connected to the collection cylinder, and a transmission belt is sleeved between the linkage roller and the driving roller.

[0016] Preferably, the injection mechanism includes an automatic feeding box arranged in the processing tank for storing the flocculation cleaning agent, and the automatic feeding box is fixedly connected to an automatic feeding pipe for replenishing the flocculation cleaning agent;

[0017] An injection pipe for injecting a flocculant is rotatably installed between the automatic feeding box and the separation drum, and the injection pipe is arranged inside the linkage roller. When the automatic feeding box is started, a fixed amount of flocculant is automatically injected into the separation drum through the injection pipe, and the impurities in the wastewater are precipitated and separated by mixing the flocculant with the wastewater.

[0018] A mixing mechanism for mixing wastewater and flocculant is provided in the separation cylinder. The mixing mechanism includes two mounting plates fixedly mounted on the inner wall of the separation cylinder. A swinging stirring plate is rotatably mounted on each mounting plate, and a swinging spring is provided between the two sides of each swinging stirring plate and the corresponding mounting plate.

[0019] Preferably, two separation boxes are fixedly mounted on the separation cylinder, and each separation box is provided with a separation assembly;

[0020] The separation assembly includes a fixed plate fixedly installed in the separation box, the fixed plate is provided with two communication openings, and a separation mesh plate for separating the flocculent waste residue and the wastewater is fixedly installed in each communication opening, an outer scraper that cooperates with the inner wall of the collection cylinder is fixedly installed on the fixed plate through a telescopic rod, and two tension springs for resetting are fixedly installed between the outer scraper and the fixed plate;

[0021] Two sealing cover plates matched with corresponding communication openings are fixedly mounted on the outer scraper, and the sealing of the separation screen is achieved through the cooperation between the sealing cover plates and the communication openings.

[0022] Preferably, a wind tube is fixedly installed in the processing tank, and the wind tube is rotatably connected to the driving roller, a plurality of wind impellers are fixedly installed on the driving roller, and the plurality of wind impellers are all located in the wind tube, a heating mesh plate is provided in the wind tube, a ventilation pipe for air supply is fixedly connected to the wind tube, and an air inlet pipe for exhaust is fixedly connected between the wind tube and the collecting tube;

[0023] The treatment tank is provided with a wastewater discharge pipe for discharging treated wastewater, and a collection box for collecting wastewater is fixedly connected between the wastewater discharge pipe and the collection cylinder.

[0024] A wastewater treatment method based on a refinery catalytic cracking desulfurization and dust removal system is used in the above-mentioned wastewater treatment device based on a refinery catalytic cracking desulfurization and dust removal system, comprising the following steps:

[0025] S1. The wastewater in the dust removal system is introduced into the coarse filtration unit through the treatment tank, and the filter plate in the filter assembly is used to achieve preliminary filtration of large-volume impurities in the wastewater;

[0026] S2. The filtered wastewater is injected into the separation cylinder in the fine filtration unit, and the extrusion assembly is started to drive the extrusion cover to squeeze the wastewater on the filter plate to squeeze out the excess wastewater;

[0027] S3. Automatically inject an appropriate amount of flocculant into the separation cylinder through the injection mechanism, and drive the separation cylinder to rotate slowly through the drive assembly to fully mix the flocculant with the wastewater;

[0028] S4. After the flocculation, the rotation speed of the separation drum is increased by the driving component, so that the wastewater and the flocculated impurities are discharged after secondary fine filtration through the separation mesh plate, thereby realizing the secondary treatment of the wastewater.

[0029] The present invention provides a wastewater treatment device and method based on a refinery catalytic cracking desulfurization and dust removal system. It has the following beneficial effects:

[0030] 1. When treating wastewater, this wastewater treatment device can fully filter out large-volume impurities in the wastewater through the setting of the filter plate, and after filtering, the wastewater accumulated in the large-volume impurities can be fully squeezed out by repeated squeezing, thereby realizing the extrusion treatment of the wastewater in the impurities and improving the effect of solid-liquid separation of the wastewater.

[0031] 2. When treating wastewater, this wastewater treatment device adopts the method of quantitatively injecting flocculants. By mixing the flocculants with wastewater and stirring them evenly, the impurities dissolved in the wastewater can be effectively flocculated, thereby realizing secondary separation treatment of the wastewater, and the treated wastewater is cleaner.

[0032] 3. When treating wastewater, this wastewater treatment device can, after the wastewater flocculation is completed, throw out the wastewater by centrifugal liquid separation to separate it from the flocculated waste residue, further improving the separation effect of the flocculated impurities, and at the same time avoiding the mixing of wastewater and flocculated impurities, thereby improving the wastewater treatment effect.

[0033] In summary, the present invention can not only filter out large-volume impurities in wastewater, but also realize the flocculation, precipitation, separation and purification of dissolved impurities in wastewater, realize multi-stage purification treatment of wastewater, and after filtration, use pressurized water squeezing and centrifugal water removal to fully remove the wastewater accumulated in the impurities, so that the wastewater treatment is more thorough.

[0034] Other features and advantages of the present invention will be described in the following description, and part of them will become obvious from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] The specific embodiments of the present invention will be further described in detail below with reference to the accompanying drawings, wherein:

[0036] Figure 1 This is a schematic structural diagram of a wastewater treatment device based on a refinery catalytic cracking desulfurization and dust removal system proposed by the present invention;

[0037] Figure 2 for Figure 1 Schematic diagram of the structure after rotating a certain angle;

[0038] Figure 3 for Figure 1 Schematic diagram of the internal structure of the intermediate treatment tank;

[0039] Figure 4 for Figure 3 Front view of

[0040] Figure 5 for Figure 3 Schematic diagram of the structure after removing the treatment tank;

[0041] Figure 6 for Figure 5 Schematic diagram of the upper structure of the middle filter box;

[0042] Figure 7 for Figure 6 Schematic diagram of the internal structure of the filter box;

[0043] Figure 8 for Figure 7 Schematic diagram of the internal structure of the filter box;

[0044] Figure 9 for Figure 5 Schematic diagram of the structure of the medium and fine filtration unit;

[0045] Figure 10 for Figure 9 Schematic diagram of the internal structure of the collecting cylinder;

[0046] Figure 11 for Figure 10 Schematic diagram of the structure after removing the collecting cylinder;

[0047] Figure 12 for Figure 11 Schematic diagram of the internal structure of the separation cylinder;

[0048] Figure 13 for Figure 12 A magnified view of the structure of the middle mounting plate;

[0049] Figure 14 for Figure 12 Schematic diagram of the structure of the separation box;

[0050] Figure 15 for Figure 14 Schematic diagram of the structural decomposition;

[0051] Figure 16 for Figure 9 Schematic diagram of the internal structure of the stroke cylinder.

[0052] In the figure: 1 treatment tank, 2 wastewater inlet pipe, 3 control console, 4 support leg, 5 wastewater discharge pipe, 6 automatic feeding pipe, 7 ventilation pipe, 8 filter box, 9 collection barrel, 10 servo motor, 11 air cylinder, 12 drive roller, 13 automatic feeding box, 14 water guide pipe, 15 lifting platform, 16 extrusion cover, 17 hydraulic drive rod, 18 return spring, 19 filter screen, 20 air inlet pipe, 21 transmission belt, 22 separation barrel, 23 injection pipe, 24 outer scraper, 25 separation box, 26 linkage roller, 27 mounting plate, 28 separation screen, 29 swing stirring plate, 30 swing spring, 31 sealing cover, 32 tension spring, 33 telescopic rod, 34 fixing plate, 35 connecting opening, 36 fan wheel, 37 limit slide bar. DETAILED DESCRIPTION

[0053] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0054] Example 1: Reference Figure 1-Figure 2 , a wastewater treatment device based on a catalytic cracking desulfurization and dust removal system of a refinery, comprising a treatment tank 1, wherein the treatment tank 1 is used to collect wastewater generated in the catalytic cracking desulfurization and dust removal system;

[0055] The wastewater treatment plant also includes:

[0056] The coarse filtration unit is arranged in the treatment tank 1. The coarse filtration unit is used to perform preliminary filtration on large-volume particulate impurities in the wastewater, and after filtration, the wastewater accumulated in the impurity particles is squeezed out by squeezing, thereby achieving sufficient separation of impurities and wastewater;

[0057] The fine filtration unit is arranged on the side of the coarse filtration unit. The fine filtration unit filters and separates the wastewater after coarse filtration again by adopting coagulation and centrifugation methods, so as to fully remove the dissolved impurities in the wastewater and further improve the wastewater treatment effect.

[0058] The solid particles generated in the catalytic cracking desulfurization and dust removal system of the refinery are mainly catalyst dust and coke particles. The particle size of catalyst dust is usually between 1 micron and 100 microns, and is removed by a fine filtration unit in this device. The particle size of coke particles is usually between 10 microns and 500 microns, and is removed by a coarse filtration unit in this device for preliminary filtration, filtering out the larger particles.

[0059] The lower part of the treatment tank 1 is provided with support legs 4 for supporting the treatment tank 1. The support of the support legs 4 improves the stability of the treatment tank 1.

[0060] The volume of the treatment tank 1 can be produced and prepared according to the amount of wastewater generated by the refinery catalytic cracking desulfurization and dust removal system in actual production applications. If the amount of wastewater is not large, the volume can be appropriately reduced. If the amount of wastewater is large, the volume of the treatment tank 1 can be increased to increase the wastewater treatment capacity.

[0061] A control console 3 is provided on the side of the treatment tank 1 , and the operation and opening and closing states of the coarse filtration unit and the fine filtration unit are controlled by the control console 3 to realize the automated treatment of wastewater and improve the treatment efficiency of wastewater.

[0062] Example 2: Reference Figure 2-Figure 8 The technical solution of this embodiment is different from that of the first embodiment in that the coarse filtration unit includes a filter assembly and an extrusion assembly, wherein the filter assembly is provided with a filter screen 19 for filtering wastewater, and the extrusion assembly is provided with an extrusion cover 16, and the extrusion assembly drives the extrusion cover 16 to move downward to squeeze the waste residue on the filter screen 19, thereby squeezing out the wastewater in the waste residue;

[0063] The filter assembly includes a filter box 8 fixedly mounted in the treatment tank 1, and the filter box 8 is fixedly connected to a wastewater inlet pipe 2 for collecting wastewater. A plurality of limiting slide bars 37 are fixedly mounted in the filter box 8, and a lifting platform 15 is slidably mounted on the plurality of limiting slide bars 37. A filter screen 19 for filtering large-volume particulate matter in the wastewater is fixedly mounted on the lifting platform 15.

[0064] The wastewater to be treated enters the filter box 8 in the treatment tank 1 through the wastewater inlet pipe 2 and comes into contact with the filter screen 19 in the filter box 8. At this time, the wastewater and the small-volume impurities in it will directly fall through the filter screen 19, while the large-volume impurities in the wastewater will accumulate on the filter screen 19, thereby achieving preliminary filtration and separation of the large-volume impurities in the wastewater and the wastewater.

[0065] In a further embodiment, the extrusion assembly includes two hydraulic drive rods 17 fixedly mounted in the filter box 8, and an extrusion cover plate 16 is fixedly mounted on the driving ends of the two hydraulic drive rods 17. The extrusion cover plate 16 cooperates with the filter screen plate 19, and two return springs 18 are fixedly mounted between the lifting platform 15 and the bottom of the filter box 8;

[0066] After the wastewater is filtered, the two hydraulic drive rods 17 can be started to drive the extrusion cover plate 16 at its lower part to move downward. When the extrusion cover plate 16 moves downward, it will be pressed into the filter screen plate 19 on the lifting platform 15. At this time, when the extrusion cover plate 16 continues to move downward, it will synchronously press the lifting platform 15 and the filter screen plate 19 thereon to move downward synchronously. While moving downward, the extrusion cover plate 16 will fully squeeze the large-volume impurities on the filter screen plate 19, and the residual wastewater accumulated in the large-volume impurities can be pressed out, thereby achieving full separation of wastewater and large-volume impurities, and improving the wastewater treatment effect.

[0067] Example 3: Reference Figure 2-Figure 5 as well as Figures 9-16 The technical solution of this embodiment is different from that of the second embodiment in that the fine filtration unit includes a flocculation component and a separation component, wherein the flocculation component is provided with a separation cylinder 22 for collecting wastewater, an injection mechanism and a driving mechanism, and the flocculation purifier is quantitatively injected into the wastewater in the separation cylinder 22 through the injection mechanism to achieve flocculation and slag removal, and a separation mesh plate 28 is provided in the separation component, and the separation cylinder 22 is driven to rotate by the driving mechanism and cooperates with the separation of the separation mesh plate 28 to achieve separation of flocculated waste slag and wastewater.

[0068] The flocculation assembly further includes a collecting cylinder 9 fixedly mounted in the treatment tank 1, and a separation cylinder 22 rotatably mounted in the collecting cylinder 9. A water conduit 14 for conducting filtered wastewater is fixedly connected between the filter box 8 and the collecting cylinder 9, and the water conduit 14 is rotatably connected to the separation cylinder 22.

[0069] The wastewater filtered in the filter box 8 is transferred to the separation cylinder 22 in the collection cylinder 9 through the water pipe 14, thereby completing the temporary storage of the wastewater.

[0070] When the extrusion cover 16 and the extrusion lifting platform 15 are moved downward, the downward movement of the lifting platform 15 will squeeze the wastewater located below the filter box 8, thereby accelerating the speed at which the wastewater in the filter box 8 enters the water pipe 14, thereby improving the conduction and drainage efficiency of the wastewater.

[0071] In a further embodiment, the driving mechanism includes a servo motor 10 fixedly mounted in the processing tank 1, and a driving roller 12 is fixedly mounted on the driving end of the servo motor 10, a linkage roller 26 is fixedly mounted on the separation cylinder 22, and the linkage roller 26 is rotatably connected to the collection cylinder 9, and a transmission belt 21 is sleeved between the linkage roller 26 and the driving roller 12;

[0072] When the servo motor 10 is started, it will drive the driving roller 12 on its driving end to rotate. When the driving roller 12 rotates, it will drive the linkage roller 26 to rotate with the cooperation of the transmission belt 21. Since the linkage roller 26 is fixedly connected to the separation cylinder 22, when the linkage roller 26 rotates, it will drive the separation cylinder 22 to rotate together.

[0073] In a further embodiment, the injection mechanism includes an automatic feeding box 13 provided in the treatment tank 1 for storing the flocculant. The automatic feeding box 13 is a device capable of automatic feeding in the prior art. It can quantitatively extract an appropriate amount of flocculant that can react with the wastewater according to the wastewater content in the separation cylinder 22. This part is prior art and will not be described in detail here.

[0074] The time for coagulation and sedimentation can be determined by comparing the amount of wastewater in the separation cylinder 22 with the content of the injected coagulation and purification agent, and according to the coagulation characteristics of the coagulation and purification agent. An observation camera can also be provided in the separation cylinder 22 to directly observe the coagulation and sedimentation of the wastewater in the separation cylinder 22 through the observation camera. That is, when the supernatant on the top of the wastewater becomes clear, it is determined that the coagulation and sedimentation is complete.

[0075] The automatic feeding box 13 is fixedly connected with an automatic feeding pipe 6 for replenishing the flocculation cleaning agent. The automatic feeding pipe 6 can be used to quantitatively replenish an appropriate amount of flocculation cleaning agent into the automatic feeding box 13 to maintain sufficient flocculation cleaning agent content in the automatic feeding box 13.

[0076] An injection pipe 23 for injecting a flocculant is rotatably installed between the automatic feeding box 13 and the separation drum 22. The injection pipe 23 is arranged inside the linkage roller 26. When the automatic feeding box 13 is started, a fixed amount of flocculant is automatically injected into the separation drum 22 through the injection pipe 23. The mixing of the flocculant and the wastewater achieves precipitation and separation of impurities therein.

[0077] The flocculant in the automatic feeding box 13 will be injected into the separation drum 22 through the injection pipe 23, and will be mixed with the wastewater in the separation drum 22 to react and form flocs. Moreover, since the injection pipe 23 is located inside the linkage roller 26 and is rotatably connected to the linkage roller 26, the linkage roller 26 will not drive the injection pipe 23 to rotate synchronously when it rotates.

[0078] A mixing mechanism for mixing wastewater and flocculant is provided in the separation cylinder 22. The mixing mechanism includes two mounting plates 27 fixedly mounted on the inner wall of the separation cylinder 22. A swinging stirring plate 29 is rotatably mounted on each mounting plate 27. A swinging spring 30 is provided between the two sides of each swinging stirring plate 29 and the corresponding mounting plate 27.

[0079] When the flocculant is injected, the servo motor 10 starts to drive the separation drum 22 to rotate through the cooperation of the driving roller 12, the transmission belt 21, and the linkage roller 26. When the separation drum 22 rotates, the wastewater and the flocculant inside it are driven to rotate. At the same time, the rotation of the separation drum 22 also synchronously drives the two mounting plates 27 thereon to rotate. When the mounting plates 27 rotate, they drive the swing stirring plates 29 thereon to rotate synchronously. At the same time, with the cooperation of the symmetrically arranged swing springs 30, the swing stirring plates 29 are driven to swing synchronously, so that the swing stirring plates 29 rotate and swing at the same time.

[0080] That is, the separation cylinder 22 rotates automatically and the swinging stirring plate 29 rotates and swings at the same time, so that the wastewater and the flocculation purifier are fully mixed, and then the filtered wastewater is fully finely filtered, flocculated and purified, thereby realizing secondary treatment of the wastewater.

[0081] In a further embodiment, two separation boxes 25 are fixedly mounted on the separation cylinder 22, and each separation box 25 is provided with a separation assembly, which includes a fixed plate 34 fixedly mounted in the separation box 25, with two communication openings 35 formed on the fixed plate 34, and a separation mesh plate 28 for separating flocculent waste residue and wastewater is mounted in each communication opening 35, an outer scraper 24 that cooperates with the inner wall of the collection cylinder 9 is fixedly mounted on the fixed plate 34 via a telescopic rod 33, and two tension springs 32 for resetting are fixedly mounted between the outer scraper 24 and the fixed plate 34;

[0082] After the wastewater is purified by flocculation, the flocculated impurities generated during the flocculation process will be mixed with the wastewater in the separation cylinder 22 .

[0083] Two sealing covers 31 are fixedly mounted on the outer scraper 24 and matched with the corresponding communication openings 35. The sealing of the separation mesh 28 is achieved by the cooperation between the sealing covers 31 and the communication openings 35.

[0084] The servo motor 10 increases the rotation speed of the driving roller 12, thereby increasing the rotation speed of the separation drum 22. When the rotation speed of the separation drum 22 increases, the rotation speeds of the separation box 25 and the outer scraper 24 thereon will increase synchronously. When the rotation speed of the outer scraper 24 increases, the centrifugal force it receives will also increase synchronously. Under the action of the centrifugal force, the outer scraper 24 is driven to make a centrifugal deviation, thereby pulling the telescopic rod 33 and the sealing cover plate 31 to move.

[0085] In the initial state, the two sealing covers 31 are located in the communicating opening 35 and will seal the separation mesh plate 28 in the communicating opening 35. When the outer scraper 24 drives the sealing cover plate 31 to move outward, the sealing state of the separation mesh plate 28 will be released. At this time, when the separation cylinder 22 rotates, the wastewater therein will be thrown out through the separation mesh plate 28 under the action of centrifugal force, while the flocculent impurities in the wastewater cannot pass through the separation mesh plate 28 and will accumulate inside the separation cylinder 22. At the same time, by adopting the centrifugal separation method, the wastewater attached to the flocculent impurities can also be fully thrown out, thereby achieving full separation of the wastewater and the flocculent impurities, and further improving the wastewater treatment effect.

[0086] When the outer scraper 24 moves outward, the two tension springs 32 thereon are stretched. When the outer scraper 24 moves to fit the inner wall of the collecting tube 9, it is at its maximum position. At this time, when the outer scraper 24 rotates, it scrapes the inner wall of the collecting tube 9, thereby fully scraping off the wastewater attached to the inner wall of the collecting tube 9 and preventing the wastewater from adhering to and accumulating inside the collecting tube 9.

[0087] When the servo motor 10 drives the separation drum 22 to slow down and stop, the two tension springs 32 will automatically shrink and reset, thereby driving the outer scraper 24 to reset, and then driving the sealing cover plate 31 to move back and reset, thereby achieving re-sealing of the separation mesh plate 28 to facilitate the treatment of the next batch of wastewater.

[0088] In a further embodiment, a wind tube 11 is fixedly installed in the processing tank 1, and the wind tube 11 is rotatably connected to the driving roller 12. A plurality of wind impellers 36 are fixedly installed on the driving roller 12, and the plurality of wind impellers 36 are all located in the wind tube 11. A heating mesh plate is provided in the wind tube 11. A ventilation pipe 7 for supplying air is fixedly connected to the wind tube 11, and an air inlet pipe 20 for exhausting air is fixedly connected between the wind tube 11 and the collecting tube 9.

[0089] When the servo motor 10 drives the driving roller 12 to rotate, the driving roller 12 will drive multiple impellers 36 to rotate. When the impellers 36 rotate, they will draw air into the wind tube 11 through the ventilation pipe 7, and at the same time start the heating mesh to heat the air in the wind tube 11. After heating, the hot air is blown into the collecting tube 9 through the air inlet pipe 20, and the wastewater in the collecting tube 9 can be dried by hot air. At the same time, the hot air will pass through the separation mesh 28 into the separation tube 22, and then dry the flocculent impurities in the separation tube 22, further promoting the dehydration effect of the flocculent impurities, and realizing the full separation of the flocculent impurities and wastewater.

[0090] The treatment tank 1 is provided with a wastewater drain pipe 5 for discharging treated wastewater, and a collecting box for collecting wastewater is fixedly connected between the wastewater drain pipe 5 and the collecting cylinder 9. The wastewater in the collecting cylinder 9 will be discharged into the wastewater drain pipe 5 through the collecting box and directly discharged through the wastewater drain pipe 5. At the same time, the hot air in the collecting cylinder 9 will also enter the wastewater drain pipe 5 synchronously and be discharged synchronously with the wastewater.

[0091] The treatment tank 1, filter box 8, collection tube 9 and separation tube 22 are all provided with inspection openings and discharge ports. The treatment tank 1, filter box 8, collection tube 9 and separation tube 22 can be inspected through the inspection openings, and the impurities (i.e., flocculent impurities) collected in the filter box and separation tube 22 can be discharged and collected through the discharge ports.

[0092] The wastewater generated in the refinery's catalytic cracking desulfurization and dust removal system mainly includes process steps such as filtration, flocculation sedimentation, filter pressing dehydration and oxidation. In actual application, this wastewater treatment device can adopt multiple sets of equipment for cross-use and synchronous operation. That is, when the first wastewater treatment device is performing sedimentation treatment, the second wastewater treatment device continuously feeds water for synchronous filtration treatment of wastewater, so that the wastewater can be continuously discharged for treatment, thereby ensuring the continuity of wastewater treatment, eliminating waiting time during wastewater treatment, and improving treatment efficiency;

[0093] At the same time, the wastewater discharged through the wastewater discharge pipe 5 can be introduced into the external oxidation system for oxidation treatment of the wastewater, and the flocculent precipitate discharged through the discharge port can be transferred to the plate and frame filter press for further dehydration through the plate and frame filter press, and the pressed wastewater is simultaneously introduced into the oxidation system for oxidation treatment, and the filter cake produced by the filtration is directly recovered and reprocessed.

[0094] The operating principle of this wastewater treatment device is as follows: the wastewater to be treated enters the filter box 8 in the treatment tank 1 through the wastewater inlet pipe 2 and comes into contact with the filter screen 19 in the filter box 8. At this time, the wastewater and the small impurities in it will directly fall through the filter screen 19, while the large impurities in the wastewater will accumulate on the filter screen 19, completing the initial filtration of the wastewater;

[0095] After the wastewater is filtered, the two hydraulic drive rods 17 are started to drive the extrusion cover 16 to move downward. When the extrusion cover 16 moves downward, it squeezes the filter plate 19 on the lifting platform 15, so that the large-volume impurities on the filter plate 19 can be fully squeezed, thereby squeezing out the residual wastewater accumulated in the large-volume impurities, thereby realizing the preliminary treatment of the wastewater.

[0096] The wastewater filtered in the filter box 8 will be conducted to the separation cylinder 22 in the collection cylinder 9 through the water pipe 14, and then the automatic feeding box 13 will be started to quantitatively inject the flocculant and purifying agent therein into the separation cylinder 22 through the injection pipe 23, and then the servo motor 10 will be started to drive the separation cylinder 22 to rotate through the cooperation of the drive roller 12, the transmission belt 21, and the linkage roller 26. When the separation cylinder 22 rotates, the wastewater and the flocculant and purifying agent therein will be driven to rotate, and the rotation and swinging effect of the swinging stirring plate 29 will be coordinated to make the wastewater and the flocculant and purifying agent fully mixed, and then the filtered wastewater will be fully finely filtered, flocculated and purified, thereby realizing secondary treatment of the wastewater.

[0097] The servo motor 10 increases the speed of the driving roller 12 to increase the speed of the separation drum 22. When the speed of the separation drum 22 increases, the speeds of the separation box 25 and the outer scraper 24 thereon will increase synchronously. Under the action of centrifugal force, the outer scraper 24 will be driven to deflect centrifugally, thereby pulling the telescopic rod 33 and the sealing cover plate 31 to move.

[0098] When the outer scraper 24 drives the sealing cover plate 31 to move outward, the sealing state of the separation mesh plate 28 is released. At this time, when the separation cylinder 22 rotates, the wastewater therein is thrown out through the separation mesh plate 28 under the action of centrifugal force, while the flocculent impurities in the wastewater cannot pass through the separation mesh plate 28 and will accumulate inside the separation cylinder 22. At the same time, the wastewater attached to the flocculent impurities can be fully thrown out by using the centrifugal separation method, thereby achieving tertiary treatment of wastewater.

[0099] The coarse filtration, sedimentation fine filtration and discharge of wastewater are all arranged in the treatment tank 1. In actual use, an appropriate amount of wastewater can be coarsely filtered through the coarse filtration unit and then injected into the fine filtration unit for sedimentation fine filtration. During the sedimentation fine filtration process, the coarse filtration unit can continue to operate to achieve coarse filtration. After the flocculent sedimentation in the fine filtration unit is completed, it is directly discharged through the wastewater discharge pipe 5. After discharge, the treated wastewater in the coarse filtration unit is directly introduced into the fine filtration unit to achieve fine filtration again, so as to increase the treatment continuity of wastewater and improve the treatment efficiency of wastewater.

[0100] The present invention also provides a wastewater treatment method based on a refinery catalytic cracking desulfurization and dust removal system, which is used in the above-mentioned wastewater treatment device based on a refinery catalytic cracking desulfurization and dust removal system, and includes the following steps:

[0101] S1. The wastewater in the dust removal system is introduced into the coarse filtration unit through the treatment tank 1, and the filter plate 19 in the filter assembly is used to achieve preliminary filtration of large-volume impurities in the wastewater;

[0102] S2. The filtered wastewater is injected into the separation cylinder 22 in the fine filtration unit, and the extrusion assembly is activated to drive the extrusion cover plate 16 to squeeze the wastewater on the filter screen plate 19 to squeeze out the excess wastewater;

[0103] S3. Automatically inject an appropriate amount of flocculation purifier into the separation cylinder 22 through the injection mechanism, and slowly rotate the separation cylinder 22 through the drive assembly to fully mix the flocculation purifier with the wastewater;

[0104] S4. After the flocculants are coagulated, the rotation speed of the separation drum 22 is increased by the driving assembly, so that the wastewater and the flocculants are filtered through the separation mesh plate 28 for the second time and then discharged, thereby realizing the secondary treatment of the wastewater.

[0105] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A wastewater treatment device based on a refinery catalytic cracking desulfurization and dust removal system, comprising a treatment tank (1), wherein the treatment tank (1) is used to collect wastewater generated in the catalytic cracking desulfurization and dust removal system, and is characterized in that: Also includes: A coarse filtration unit is provided in the treatment tank (1), comprising a filter assembly and an extrusion assembly, wherein a filter screen plate (19) for filtering wastewater is provided in the filter assembly, and an extrusion cover plate (16) is provided in the extrusion assembly, and the extrusion cover plate (16) is driven by the extrusion assembly to move downward to extrude the waste residue on the filter screen plate (19), thereby achieving the extrusion of wastewater in the waste residue; The fine filtration unit is arranged on the side of the coarse filtration unit, and includes a flocculation component and a separation component, wherein the flocculation component is provided with a separation cylinder (22) for collecting wastewater, an injection mechanism and a driving mechanism, and the wastewater in the separation cylinder (22) is quantitatively injected with a flocculation purifier through the injection mechanism to achieve flocculation and slag removal, and the separation component is provided with a separation screen (28), and the separation cylinder (22) is driven by the driving mechanism to rotate and cooperate with the separation screen (28) to separate, thereby achieving separation of flocculation waste residue and wastewater; A mixing mechanism for mixing wastewater and a flocculant is provided in the separation cylinder (22), the mixing mechanism comprising two mounting plates (27) fixedly mounted on the inner wall of the separation cylinder (22), a swing stirring plate (29) being rotatably mounted on each mounting plate (27), and a swing spring (30) being provided between two sides of each swing stirring plate (29) and the corresponding mounting plate (27); Two separation boxes (25) are fixedly mounted on the separation cylinder (22), and each separation box (25) is provided with a separation assembly, the separation assembly comprising a fixed plate (34) fixedly mounted in the separation box (25), two communication openings (35) being provided on the fixed plate (34), and a separation mesh plate (28) for separating flocculated waste residue and wastewater being clamped and mounted in each communication opening (35), an outer scraper (24) that cooperates with the inner wall of the collection cylinder (9) is fixedly mounted on the fixed plate (34) via a telescopic rod (33), and two tension springs (32) for resetting are fixedly mounted between the outer scraper (24) and the fixed plate (34); Two sealing covers (31) matched with corresponding communication openings (35) are fixedly mounted on the outer scraper (24), and the sealing of the separation screen (28) is achieved through the matching of the sealing covers (31) and the communication openings (35).

2. The wastewater treatment device based on the refinery catalytic cracking desulfurization and dust removal system according to claim 1 is characterized in that: The lower portion of the treatment tank (1) is provided with support legs (4) for supporting the treatment tank (1), and the support of the support legs (4) improves the stability of the treatment tank (1); A control console (3) is provided on the side of the treatment tank (1), and the operation and opening and closing states of the coarse filtration unit and the fine filtration unit are controlled by the control console (3), thereby realizing automated treatment of wastewater.

3. The wastewater treatment device based on the refinery catalytic cracking desulfurization and dust removal system according to claim 1 is characterized in that: The filter assembly comprises a filter box (8) fixedly mounted in a treatment tank (1), and the filter box (8) is fixedly connected to a wastewater inlet pipe (2) for collecting wastewater, a plurality of limiting slide bars (37) are fixedly mounted in the filter box (8), and a lifting platform (15) is slidably mounted on the plurality of limiting slide bars (37), and a filter screen plate (19) for filtering large-volume particulate matter in the wastewater is fixedly mounted on the lifting platform (15).

4. The wastewater treatment device based on the refinery catalytic cracking desulfurization and dust removal system according to claim 3 is characterized in that: The extrusion assembly includes two hydraulic drive rods (17) fixedly installed in the filter box (8), an extrusion cover plate (16) is fixedly installed on the driving ends of the two hydraulic drive rods (17), and the extrusion cover plate (16) is matched with the filter screen plate (19), and two return springs (18) are fixedly installed between the lifting platform (15) and the bottom of the filter box (8).

5. The wastewater treatment device based on the refinery catalytic cracking desulfurization and dust removal system according to claim 4 is characterized in that: The flocculation assembly further comprises a collecting cylinder (9) fixedly mounted in the treatment tank (1), and a separation cylinder (22) rotatably mounted in the collecting cylinder (9); a water pipe (14) for conducting filtered wastewater is fixedly connected between the filter box (8) and the collecting cylinder (9), and the water pipe (14) is rotatably connected to the separation cylinder (22).

6. The wastewater treatment device based on the refinery catalytic cracking desulfurization and dust removal system according to claim 5 is characterized in that: The driving mechanism comprises a servo motor (10) fixedly mounted in the processing tank (1), a driving roller (12) fixedly mounted on the driving end of the servo motor (10), a linkage roller (26) fixedly mounted on the separation cylinder (22), and the linkage roller (26) is rotatably connected to the collection cylinder (9), and a transmission belt (21) is sleeved between the linkage roller (26) and the driving roller (12).

7. The wastewater treatment device based on the refinery catalytic cracking desulfurization and dust removal system according to claim 6, characterized in that: The injection mechanism comprises an automatic feeding box (13) arranged in the processing tank (1) for storing the flocculation cleaning agent, and the automatic feeding box (13) is fixedly connected to an automatic feeding pipe (6) for replenishing the flocculation cleaning agent; An injection pipe (23) for injecting a flocculating purifying agent is rotatably installed between the automatic feeding box (13) and the separation cylinder (22), and the injection pipe (23) is arranged to penetrate the interior of the linkage roller (26). When the automatic feeding box (13) is started, a quantitative amount of flocculating purifying agent is automatically injected into the separation cylinder (22) through the injection pipe (23), and the impurities in the wastewater are precipitated and separated by mixing the flocculating purifying agent with the wastewater.

8. The wastewater treatment device based on the refinery catalytic cracking desulfurization and dust removal system according to claim 7 is characterized in that: A wind tube (11) is fixedly installed in the processing tank (1), and the wind tube (11) is rotatably connected to the driving roller (12). A plurality of wind impellers (36) are fixedly installed on the driving roller (12), and the plurality of wind impellers (36) are all located in the wind tube (11). A heating mesh plate is provided in the wind tube (11). A ventilation pipe (7) for air supply is fixedly connected to the wind tube (11), and an air inlet pipe (20) for exhausting air is fixedly connected between the wind tube (11) and the collecting cylinder (9); The treatment tank (1) is provided with a wastewater discharge pipe (5) for discharging treated wastewater, and a collection box for collecting wastewater is fixedly connected between the wastewater discharge pipe (5) and the collection cylinder (9).

9. A wastewater treatment method based on a refinery catalytic cracking desulfurization and dust removal system, used in a wastewater treatment device based on a refinery catalytic cracking desulfurization and dust removal system as claimed in any one of claims 1 to 8, characterized in that: The following steps are involved: S1. Wastewater in the dust removal system is introduced into the coarse filtration unit through the treatment tank (1), and the filter plate (19) in the filter assembly is used to perform preliminary filtration of large-volume impurities in the wastewater; S2, the filtered wastewater is injected into the separation cylinder (22) in the fine filtration unit, and at the same time, the extrusion assembly is started to drive the extrusion cover (16) to squeeze the wastewater on the filter screen (19) to squeeze out the excess wastewater; S3, automatically injecting an appropriate amount of flocculation purifying agent into the separation cylinder (22) through the injection mechanism, and driving the separation cylinder (22) to slowly rotate through the driving component to fully mix the flocculation purifying agent with the wastewater; S4. After the flocculation, the rotation speed of the separation drum (22) is increased by the driving assembly, so that the wastewater and the flocculated impurities are discharged after secondary fine filtration through the separation mesh plate (28), thereby realizing the secondary treatment of the wastewater.

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