A multi-stage filtering treatment and regeneration device for corrugated paper production wastewater

Abstract

This invention discloses a multi-stage filtration and regeneration device for corrugated paper production wastewater, relating to the field of wastewater treatment technology. It includes a regeneration mechanism and an anaerobic fermentation tank installed outside the regeneration mechanism. A multi-stage filtration system is provided on one side of the regeneration mechanism, and a water guide cover is provided on the outside of the multi-stage filtration system. The regeneration mechanism includes meshing toothed rings symmetrically installed on both sides of the interior of the anaerobic fermentation tank. An inlet valve is fixedly installed on one side of the top of the anaerobic fermentation tank. A submersible pump draws wastewater from inside the anaerobic fermentation tank through a water-pumping filter into the interior of a multi-nozzle and sprays it out through the nozzles, thereby achieving lateral circulation of the wastewater and improving the efficiency of the reaction between the wastewater and the microorganisms inside the anaerobic fermentation tank. The cleaning scraper and nozzles can clean the scum in the gap between the two pulverizing blades, preventing scum accumulation and clogging of the blades.

Description

Technical Field

[0001] This invention relates to the field of wastewater treatment technology, specifically to a multi-stage filtration and regeneration device for corrugated paper production wastewater. Background Technology

[0002] Corrugated paper is a sheet-like material made by bonding linerboard and corrugated paper formed by corrugating rollers. It is generally divided into single-wall corrugated paperboard and double-wall corrugated paperboard. Corrugated paper has been invented and used for more than 100 years. It has the advantages of low cost, light weight, easy processing, high strength, excellent printability, and convenient storage and transportation. Corrugated paper production generates a large amount of wastewater. This papermaking wastewater produces a large amount of biogas during anaerobic treatment, which is a very good gaseous fuel with great utilization value. Currently, when wastewater is discharged into biogas digesters, a large amount of waste paper debris is contained in the wastewater. These debris entering the fermentation tank will seriously affect the fermentation rate and bring certain adverse effects during use.

[0003] Publication No. CN112499912A discloses a corrugated paper wastewater treatment system. This system first filters impurities from the wastewater, which then roll into a crushing zone. The crushing structure further breaks down the impurities, which are then filtered through a secondary filter before entering the biogas reaction zone for fermentation. This improves fermentation efficiency and achieves efficient treatment. The entire system is simple, easy to operate, saves production costs, and improves work efficiency. Its performance is better than traditional methods. However, this patent still has the following problems in practical use: Although the corrugated paper wastewater treatment system can first filter impurities in the wastewater, causing them to roll into the crushing zone, and then use the crushing structure to crush the impurities, the crushed impurities can be filtered through a second filter screen before entering the biogas reaction zone for fermentation, thereby improving fermentation efficiency, during the anaerobic fermentation of biogas, lighter substances in the raw materials (such as cellulose, oil, foam, etc.) float and accumulate in an anaerobic environment to form a scum layer. At the same time, inorganic particles and heavy organic matter at the bottom will also settle due to lack of disturbance, forming a sediment layer, which hinders biogas release, reduces gas production efficiency, occupies effective reaction volume, reduces treatment load, inhibits microbial activity, and damages the reaction environment. Existing technologies use stirring to break up the scum layer, but simple stirring has a certain effect on breaking up the scum layer, but its effect is limited, and the effect depends on the intensity and duration of stirring. The scum layer has formed a dense, dry crust, which is difficult to completely break up with simple mechanical stirring, thus affecting the biogas fermentation effect.

[0004] Therefore, a multi-stage filtration and regeneration device for corrugated paper production wastewater is proposed to solve the problems mentioned above. Summary of the Invention

[0005] The purpose of this invention is to provide a multi-stage filtration and regeneration device for corrugated paper production wastewater, to solve the problem mentioned in the background art where, during the anaerobic fermentation of biogas, lighter substances in the raw materials (such as cellulose, oil, foam, etc.) float and accumulate in an anaerobic environment to form a scum layer, while inorganic particles and heavy organic matter at the bottom also settle due to lack of disturbance, forming a sediment layer. This hinders biogas release, reduces gas production efficiency, occupies effective reaction volume, reduces treatment load, inhibits microbial activity, and damages the reaction environment. In the prior art, stirring is used to break up the scum layer. However, simple stirring has a certain effect on breaking up the scum layer, but its effect is limited and depends on the intensity and duration of stirring. The scum layer has formed a dense, dry crust, which is difficult to completely break up with simple mechanical stirring, thus affecting the biogas fermentation effect.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a multi-stage filtration and regeneration device for corrugated paper production wastewater, including a regeneration mechanism and an anaerobic fermentation box installed outside the regeneration mechanism; The regeneration mechanism has a multi-stage filtration mechanism on one side, and a water guide cover is provided on the outside of the multi-stage filtration mechanism. Also includes: The regeneration mechanism includes meshing toothed rings, which are symmetrically installed on both sides of the interior of the anaerobic fermentation tank. A water inlet valve is fixedly installed on one side of the top of the anaerobic fermentation tank. Among them, the inner rings of the two meshing toothed rings are meshed with several stirring gears, and the outer side of the stirring gears is rotatably connected to a rotating disk; The stirring mechanism includes a stirring main gear meshing between the gears, a stirring motor fixedly installed on one side of the anaerobic fermentation tank, and a rotating disk rotatably connected to the anaerobic fermentation tank and the meshing gear ring.

[0007] Preferably, a submersible pump is rotatably connected to one side of each of the two rotating discs. The submersible pump is fixedly connected to the main stirring gear. A water pumping pipe is fixedly connected to one side of the submersible pump. A water pumping filter screen is fixedly installed on one side of the water pumping pipe. A multi-nozzle is fixedly installed between the two water pumping filters. Several nozzles are fixedly installed on the outer side of the multi-nozzle.

[0008] Preferably, a plurality of cleaning scrapers are fixedly installed on the outer side of the two rotating discs near the submersible pump, the ends of the cleaning scrapers abut against the outer surface of the water filter screen, and cleaning scraping teeth are fixedly installed on the outer side of the cleaning scrapers.

[0009] Preferably, a stirring and pulverizing rod is fixedly connected between the two stirring gears. The stirring and pulverizing rod is rotatably connected to the rotating disk. A plurality of pulverizing blades are fixedly installed on the outer side of the stirring and pulverizing rod. Pulverizing teeth are fixedly installed on the outer side of the pulverizing blades. An exhaust valve is fixedly installed at the end of the anaerobic fermentation tank away from the water inlet valve. A first exhaust pipe is fixedly installed on the top of the exhaust valve. A dry desulfurization device is fixedly installed at the end of the first exhaust pipe. A second exhaust pipe is provided on one side of the dry desulfurization device.

[0010] Preferably, the multi-stage filtration mechanism includes a first filter box, a first connecting pipe fixedly installed at the bottom of the first filter box, a drain outlet opened on one side of the first filter box, a second filter screen fixedly installed at the bottom of the first filter box near the drain outlet, and a plurality of cleaning rollers rotatably connected to the top of the first filter box near the second filter screen.

[0011] Preferably, a cleaning motor is fixedly installed on the outside of the first filter box, the output end of the cleaning motor is fixedly connected to a cleaning roller on one side, a sprocket drive assembly is fixedly connected to the ends of the two cleaning rollers, a sprocket protective cover is fixedly installed on the outside of the first filter box near the sprocket drive assembly, an installation ring is fixedly installed at the bottom of the first connecting pipe, and a worm gear protective cover is fixedly installed on one side of the installation ring.

[0012] Preferably, a rotating bracket is symmetrically installed on the inner side of the top of the mounting ring near the worm gear protective cover. A rotating motor is fixedly installed on the outer side of one of the rotating brackets. A rotating worm is fixedly connected to the output end of the rotating motor. A rotating worm ring is meshed with the bottom of the rotating worm. A filter screen is fixedly installed on one side of the rotating worm ring. The water guide cover is rotatably connected to the filter screen. The water guide cover is fixedly connected to the worm gear protective cover.

[0013] Preferably, the water guide cover is fixedly installed on the top of the water inlet valve, a fixed bracket is fixedly installed on the inner side of the water guide cover, a conveying pipe is fixedly installed on the outer side of the water guide cover near the fixed bracket, a sewage pipe is fixedly installed on the bottom side of the conveying pipe, a conveying motor is fixedly installed at the end of the conveying pipe, and a conveying rotating rod is fixedly connected to the output end of the conveying motor.

[0014] Preferably, a conveying auger is fixedly installed on the outer side of the conveying rotating rod, the conveying rotating rod is rotatably connected to the fixed bracket, a cleaning connecting shaft is fixedly installed at the end of the conveying rotating rod, a plurality of cleaning connecting brackets are fixedly installed on the outer side of the cleaning connecting shaft, a cleaning spiral blade is fixedly installed on one side of the cleaning connecting bracket, and a connecting rotating ring is fixedly installed at the end of the cleaning spiral blade.

[0015] Compared with the prior art, the beneficial effects of this invention are as follows: This multi-stage filtration and regeneration device for corrugated paper production wastewater utilizes a submersible pump to draw wastewater from the anaerobic fermentation tank through a water-drawing filter screen into the interior of a multi-nozzle nozzle and then spraying it out through the nozzles, thereby achieving lateral circulation of the wastewater and improving the efficiency of the reaction between the wastewater and the microorganisms inside the anaerobic fermentation tank. The cleaning scraper and nozzles effectively remove scum from the gap between the two pulverizing blades, preventing scum accumulation and blockage that could affect the biogas fermentation effect. The specific details are as follows: 1. By setting up a regeneration mechanism, filtered wastewater can be introduced into the anaerobic digester through the inlet valve. The stirring motor drives the main stirring gear, which in turn drives the submersible pump and the pumping pipe. The submersible pump draws the wastewater from inside the anaerobic digester through the filter screen into the multi-nozzle nozzles, where it is then sprayed out, achieving lateral circulation of the wastewater and improving the efficiency of the reaction between the wastewater and the microorganisms inside the anaerobic digester. Simultaneously, the meshing connection between the main stirring gear, the driven stirring gear, and the meshing gear ring allows the driven stirring gear to drive the stirring and pulverizing rods to rotate. These rods then pulverize the fermentation liquid inside the anaerobic digester. Vertical circulation stirring improves the biogas fermentation effect and breaks down the scum layer formed by low-density solid materials (such as straw, sludge flocs, etc.) accumulating on the liquid surface. Simultaneously, the stirring mechanism, driven by gears, rotates the stirring and pulverizing rod, which in turn rotates the pulverizing blades and teeth. These blades and teeth cut and break down the scum layer, further enhancing the biogas fermentation effect. Furthermore, the cleaning scraper and nozzle correspond to the gaps between the two pulverizing blades, effectively cleaning the scum in these gaps and preventing clogging that could negatively impact biogas fermentation. 2. By setting up a multi-stage filtration mechanism, not only can the wastewater from corrugated paper production be initially filtered using the second filter screen inside the first filter box, but the cleaning motor is also activated to drive the cleaning rollers on one side to rotate. A sprocket drive assembly is used to rotate multiple cleaning rollers, which clean impurities from the surface of the second filter screen and discharge them through the drain outlet, thus improving the filtration effect of the second filter screen. Simultaneously, the wastewater after initial filtration enters the filter grid inside the water guide shroud through the first connecting pipe. A rotating motor is activated to drive the rotating worm gear to rotate. Utilizing the meshing connection between the rotating worm gear and the rotating worm ring, the rotating worm ring drives the filter grid to rotate, allowing for secondary filtration of the wastewater and further improving the filtration effect. A conveying motor is activated to drive the conveying rotating rod and conveying auger to rotate, using the conveying auger to transport impurities. The conveying rotating rod also drives the cleaning connecting shaft, cleaning connecting bracket, and cleaning spiral blades to rotate, using the cleaning spiral blades to clean and transport the inner wall of the filter grid, thus improving the filtration effect of the filter grid. Impurities are discharged from the inside of the conveying pipe through the drain pipe, thereby improving the wastewater filtration efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a three-dimensional cross-sectional structural diagram of the regeneration mechanism in this invention; Figure 3 This is a three-dimensional structural diagram of the stirring gear and rotating disk in this invention; Figure 4 This is a three-dimensional structural diagram of the multi-nozzle and nozzle in this invention; Figure 5 This is a three-dimensional structural diagram of the cleaning scraper and cleaning teeth in this invention; Figure 6 This is a three-dimensional structural diagram of the pulverizing blade and pulverizing teeth in this invention; Figure 7 This is a three-dimensional structural diagram of the multi-stage filtration mechanism in this invention; Figure 8 This is a three-dimensional structural diagram of the cross-section of the first filter box in this invention; Figure 9 This is a three-dimensional structural diagram of the cross-section of the water guide cover and the conveying pipe in this invention; Figure 10 This is a three-dimensional structural diagram of the rotating worm and rotating worm ring in this invention; Figure 11 This is a schematic diagram of the three-dimensional structure of the cleaning spiral blade in this invention.

[0017] In the diagram: 1. Regeneration mechanism; 101. Anaerobic fermentation tank; 102. Inlet valve; 103. Exhaust valve; 104. First exhaust pipe; 105. Dry desulfurization equipment; 106. Second exhaust pipe; 107. Meshing gear ring; 108. Agitator driven gear; 109. Rotary disc; 110. Agitator main gear; 111. Agitator motor; 112. Submersible pump; 113. Pumping pipe; 114. Pumping filter screen; 115. Multi-nozzle; 116. Nozzle; 117. Cleaning scraper; 118. Cleaning scraper teeth; 119. Agitator pulverizer; 120. Pulverizer blade; 121. Pulverizer teeth; 2. Multi-stage filtration mechanism; 201. First filter box; 202. First... 203. Connecting pipe; 204. Drain outlet; 205. Second filter screen; 206. Cleaning roller; 207. Cleaning motor; 208. Sprocket drive assembly; 209. Sprocket guard; 210. Mounting ring; 211. Rotating bracket; 212. Rotating worm; 213. Rotating worm ring; 214. Filter grid; 215. Water guide cover; 216. Fixed bracket; 217. Conveying pipe; 218. Drain pipe; 219. Conveying motor; 220. Conveying rotating rod; 221. Conveying auger; 222. Cleaning connecting shaft; 223. Cleaning connecting bracket; 224. Cleaning spiral blade; 225. Connecting rotating ring; 226. Worm gear guard. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1-4 , Figure 7This invention provides a technical solution: a multi-stage filtration and regeneration device for corrugated paper production wastewater, including a regeneration mechanism 1 and an anaerobic fermentation tank 101 installed outside the regeneration mechanism 1. A multi-stage filtration mechanism 2 is provided on one side of the regeneration mechanism 1, and a water guide cover 215 is provided on the outside of the multi-stage filtration mechanism 2. The regeneration mechanism 1 includes meshing toothed rings 107, which are symmetrically installed on both sides inside the anaerobic fermentation tank 101. An inlet valve 102 is fixedly installed on one side of the top of the anaerobic fermentation tank 101. The inner rings of two meshing toothed rings 107 are meshed with several stirring gears 108. A rotating disk 109 is rotatably connected to the outside of the stirring gears 108. A stirring main gear 110 is meshed between the stirring gears 108. A stirring motor 111 is fixedly installed on one side of the anaerobic fermentation tank 101. The rotating disk 109 is rotatably connected to the anaerobic fermentation tank 101 and the meshing toothed rings 107. Submersible pumps 112 are rotatably connected to one side of the rotating disk 109. The submersible pumps 112 are fixedly connected to the main stirring gear 110. A water pump pipe 113 is fixedly connected to one side of the submersible pump 112. A water pump filter screen 114 is fixedly installed on one side of the water pump pipe 113. A multi-nozzle nozzle 115 is fixedly installed between the two water pump filter screens 114. Several nozzles 116 are fixedly installed on the outside of the multi-nozzle nozzle 115. The filtered wastewater is introduced into the anaerobic fermentation tank 101 through the water inlet valve 102. The stirring motor 111 is started to drive the main stirring gear 110 to rotate, which in turn drives the submersible pumps 112 and the water pump pipe 113 to rotate. The submersible pumps 112 draw the wastewater inside the anaerobic fermentation tank 101 through the water pump filter screen 114 into the multi-nozzle nozzle 115 and out through the nozzles 116, thereby realizing the horizontal circulation of wastewater and improving the efficiency of the reaction between wastewater and microorganisms inside the anaerobic fermentation tank 101.

[0020] Please see Figures 2-6Two rotating discs 109 are fixedly mounted with several cleaning scrapers 117 near the outer side of the submersible pump 112. The ends of the cleaning scrapers 117 abut against the outer surface of the water filter screen 114. Cleaning scraper teeth 118 are fixedly mounted on the outer side of the cleaning scrapers 117. A stirring and pulverizing rod 119 is fixedly connected between the two stirring gears 108. The stirring and pulverizing rod 119 is rotatably connected to the rotating discs 109. Several pulverizing blades 120 are fixedly mounted on the outer side of the stirring and pulverizing rod 119. Pulverizing teeth 121 are fixedly mounted on the outer side of the pulverizing blades 120. An exhaust valve 103 is fixedly mounted at the end of the anaerobic fermentation tank 101 away from the water inlet valve 102. A first exhaust pipe 104 is fixedly mounted on the top of the exhaust valve 103. A dry desulfurization device 105 is fixedly mounted at the end of the first exhaust pipe 104. A second exhaust pipe 106 is provided on one side of the dry desulfurization device 105. The main stirring gear 110, the stirring gear 108, and the meshing gear ring 107 are meshed together. Not only does the stirring gear 108 drive the stirring and pulverizing rod 119 to revolve, allowing the stirring and pulverizing rod 119 to vertically circulate and stir the fermentation liquid inside the anaerobic fermentation tank 101, thus improving the biogas fermentation effect, but it also breaks down the scum layer formed by low-density solid materials such as straw and sludge flocs accumulating on the liquid surface. Furthermore, the stirring gear 108 drives the stirring and pulverizing rod 119 to rotate, causing the stirring and pulverizing rod 119 to drive the pulverizing blades 120 and pulverizing teeth 121 to rotate. The pulverizing blades 120 and pulverizing teeth 121 can cut and break down the scum layer, further improving the biogas fermentation effect. Additionally, the cleaning scraper teeth 118 and nozzles 116 correspond to the gaps between the two pulverizing blades 120, respectively. The cleaning scraper teeth 118 and nozzles 116 can clean the scum in the gaps between the two pulverizing blades 120, preventing scum accumulation and blockage, which would otherwise affect the biogas fermentation effect.

[0021] Please see Figure 1 , Figures 7-8The multi-stage filtration mechanism 2 includes a first filter box 201, a first connecting pipe 202 fixedly installed at the bottom of the first filter box 201, a drain port 203 on one side of the first filter box 201, a second filter screen 204 fixedly installed at the bottom of the first filter box 201 near the drain port 203, and several cleaning rollers 205 rotatably connected to the top of the first filter box 201 near the second filter screen 204. A cleaning motor 206 is fixedly installed on the outside of the first filter box 201, and the output end of the cleaning motor 206 is fixedly connected to one side of the cleaning roller 205. The ends of the two cleaning rollers 205 are fixedly connected... A sprocket drive assembly 207 is fixedly connected to the first filter box 201. A sprocket guard 208 is fixedly installed on the outside of the first filter box 201 near the sprocket drive assembly 207. The wastewater from corrugated paper production is initially filtered using the second filter screen 204 inside the first filter box 201. The cleaning motor 206 is started to drive the cleaning roller 205 on one side to rotate. The sprocket drive assembly 207 is used to realize the rotation of multiple cleaning rollers 205. The cleaning rollers 205 can clean the impurities on the surface of the second filter screen 204 and discharge them from the drain port 203, thereby improving the filtration effect of the second filter screen 204.

[0022] Please see Figures 8-9 , Figure 2 A mounting ring 209 is fixedly installed at the bottom of the first connecting pipe 202. A worm gear guard 226 is fixedly installed on one side of the mounting ring 209. A rotating bracket 210 is symmetrically installed on the inner side of the mounting ring 209 near the top of the worm gear guard 226. A rotating motor 211 is fixedly installed on the outer side of one rotating bracket 210. A rotating worm 212 is fixedly connected to the output end of the rotating motor 211. A rotating worm ring 213 is meshed with the bottom of the rotating worm ring 212. A filter screen 214 is fixedly installed on one side of the rotating worm ring 213. A water guide cover 215 is rotatably connected to the filter screen 214. The water guide cover 215 is fixedly connected to the worm gear guard 226. The water guide cover 215 is fixedly installed at the inlet. A fixed bracket 216 is fixedly installed on the top of the water valve 102 and on one side of the inside of the water guide cover 215. A conveying pipe 217 is fixedly installed on the outside of the water guide cover 215 near the fixed bracket 216. A sewage pipe 218 is fixedly installed on one side of the bottom of the conveying pipe 217. The wastewater that has undergone preliminary filtration enters the filter grid 214 inside the water guide cover 215 through the first connecting pipe 202. The rotating motor 211 is started to drive the rotating worm 212 to rotate. Utilizing the meshing connection between the rotating worm 212 and the rotating worm ring 213, the rotating worm ring 213 drives the filter grid 214 to rotate. The filter grid 214 can perform secondary filtration of the wastewater, further improving the filtration effect of the wastewater.

[0023] Please see Figures 9-11A conveying motor 219 is fixedly installed at the end of the conveying pipe 217. A conveying rotating rod 220 is fixedly connected to the output end of the conveying motor 219. A conveying auger 221 is fixedly installed on the outside of the conveying rotating rod 220. The conveying rotating rod 220 is rotatably connected to the fixed bracket 216. A cleaning connecting shaft 222 is fixedly installed at the end of the conveying rotating rod 220. Several cleaning connecting brackets 223 are fixedly installed on the outside of the cleaning connecting shaft 222. A cleaning spiral blade 224 is fixedly installed on one side of the cleaning connecting bracket 223. The end of the cleaning spiral blade 224 is fixedly mounted with... Equipped with a connecting rotating ring 225, the starting of the conveying motor 219 drives the conveying rotating rod 220 and the conveying auger 221 to rotate. The conveying auger 221 can convey impurities, and the conveying rotating rod 220 drives the cleaning connecting shaft 222, the cleaning connecting bracket 223 and the cleaning spiral blade 224 to rotate. The cleaning spiral blade 224 can clean and convey the inner wall of the filter screen 214, thereby improving the filtration effect of the filter screen 214. Impurities can be discharged from the inside of the conveying pipe 217 through the sewage pipe 218, thereby improving the filtration efficiency of wastewater.

[0024] Working Principle: Before using this multi-stage filtration and regeneration device for corrugated paper production wastewater, it is necessary to check the overall condition of the device to ensure it can operate normally. Figures 1-11 As shown, firstly, the wastewater from corrugated paper production is initially filtered using the second filter screen 204 inside the first filter box 201. The cleaning motor 206 is started, driving one side of the cleaning roller 205 to rotate. The sprocket drive assembly 207 enables the rotation of multiple cleaning rollers 205. The cleaning rollers 205 clean impurities from the surface of the second filter screen 204 and discharge them from the drain port 203, thereby improving the filtration effect of the second filter screen 204. Simultaneously, the initially filtered wastewater enters the filter grid 214 inside the water guide cover 215 through the first connecting pipe 202. The rotating motor 211 is started, driving the rotating worm gear 212 to rotate. The rotating worm gear 212 meshes with the rotating worm ring 213. The characteristics of the connection cause the rotating worm ring 213 to drive the filter screen 214 to rotate, and the filter screen 214 can perform secondary filtration of wastewater, further improving the filtration effect of wastewater. The start of the conveying motor 219 drives the conveying rotating rod 220 and the conveying auger 221 to rotate, and the conveying auger 221 can transport impurities. The conveying rotating rod 220 drives the cleaning connecting shaft 222, the cleaning connecting bracket 223 and the cleaning spiral blade 224 to rotate, and the cleaning spiral blade 224 can clean and transport the inner wall of the filter screen 214, thereby improving the filtration effect of the filter screen 214. The impurities can be discharged from the inside of the conveying pipe 217 through the sewage pipe 218, thereby improving the filtration efficiency of wastewater.

[0025] Secondly, the filtered wastewater is introduced into the anaerobic fermentation tank 101 through the inlet valve 102, and the stirring motor 111 is started to drive the stirring main gear 110 to rotate. The stirring main gear 110 drives the submersible pump 112 and the water pumping pipe 113 to rotate. The submersible pump 112 uses the water pumping filter screen 114 to enter the multi-hole nozzle 115 and spray it out through the nozzle 116, thereby realizing the horizontal circulation of wastewater and improving the efficiency of the reaction between wastewater and microorganisms inside the anaerobic fermentation tank 101.

[0026] Finally, utilizing the meshing connection between the main stirring gear 110, the driven stirring gear 108, and the meshing gear ring 107, not only can the driven stirring gear 108 drive the stirring and pulverizing rod 119 to revolve, but the stirring and pulverizing rod 119 can also vertically circulate and stir the fermentation liquid inside the anaerobic fermentation tank 101, improving the biogas fermentation effect. Simultaneously, it can break down the scum layer formed by low-density solid materials such as straw and sludge flocs accumulating on the liquid surface, and the driven stirring gear 108 can also drive the stirring and pulverizing rod 119 to rotate, thus stirring the powder... The crushing rod 119 drives the crushing blade 120 and crushing teeth 121 to rotate. The crushing blade 120 and crushing teeth 121 can cut and crush the scum layer, further improving the biogas fermentation effect. The cleaning scraper teeth 118 and the nozzle 116 correspond to the gap between the two crushing blades 120 respectively. The cleaning scraper teeth 118 and the nozzle 116 can clean the scum in the gap between the two crushing blades 120, avoiding the accumulation of scum in the gap between the two crushing blades 120, which would cause the crushing blades 120 to become blocked and thus affect the biogas fermentation effect.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A multi-stage filtration and regeneration device for corrugated paper production wastewater, comprising a regeneration mechanism (1) and an anaerobic fermentation box (101) installed outside the regeneration mechanism (1). The regeneration mechanism (1) is provided with a multi-stage filtration mechanism (2) on one side, and a water guide cover (215) is provided on the outside of the multi-stage filtration mechanism (2). Its features are, Also includes: The regeneration mechanism (1) includes a meshing toothed ring (107), which is symmetrically installed on both sides of the interior of the anaerobic fermentation tank (101). A water inlet valve (102) is fixedly installed on one side of the top of the anaerobic fermentation tank (101). Among them, the inner rings of the two meshing toothed rings (107) are meshed with a number of stirring slave gears (108), and the outer side of the stirring slave gears (108) is rotatably connected to a rotating disk (109). Among them, the stirring main gear (110) is meshed between the stirring gears (108), the stirring motor (111) is fixedly installed on one side of the anaerobic fermentation box (101), and the rotating disk (109) is rotatably connected to the anaerobic fermentation box (101) and the meshing gear ring (107).

2. The multi-stage filtration and regeneration device for corrugated paper production wastewater according to claim 1, characterized in that: A submersible pump (112) is rotatably connected to one side of each of the two rotating disks (109). The submersible pump (112) is fixedly connected to the stirring main gear (110). A water pump pipe (113) is fixedly connected to one side of the submersible pump (112). A water pump filter screen (114) is fixedly installed on one side of the water pump pipe (113). A multi-port nozzle (115) is fixedly installed between the two water pump filters (114). Several nozzles (116) are fixedly installed on the outside of the multi-port nozzle (115).

3. The multi-stage filtration and regeneration device for corrugated paper production wastewater according to claim 2, characterized in that: Two rotating discs (109) are fixedly mounted with a number of cleaning scrapers (117) near the outer side of the submersible pump (112). The ends of the cleaning scrapers (117) abut against the outer surface of the water pumping filter screen (114). Cleaning scraper teeth (118) are fixedly mounted on the outer side of the cleaning scrapers (117).

4. The multi-stage filtration and regeneration device for corrugated paper production wastewater according to claim 3, characterized in that: A stirring and pulverizing rod (119) is fixedly connected between the two stirring gears (108). The stirring and pulverizing rod (119) is rotatably connected to the rotating disk (109). Several pulverizing blades (120) are fixedly installed on the outside of the stirring and pulverizing rod (119). Pulverizing teeth (121) are fixedly installed on the outside of the pulverizing blades (120). An exhaust valve (103) is fixedly installed at the end of the anaerobic fermentation tank (101) away from the water inlet valve (102). A first exhaust pipe (104) is fixedly installed on the top of the exhaust valve (103). A dry desulfurization device (105) is fixedly installed at the end of the first exhaust pipe (104). A second exhaust pipe (106) is provided on one side of the dry desulfurization device (105).

5. The multi-stage filtration and regeneration device for corrugated paper production wastewater according to claim 1, characterized in that: The multi-stage filtration mechanism (2) includes a first filter box (201), a first connecting pipe (202) is fixedly installed at the bottom of the first filter box (201), a drain port (203) is opened on one side of the first filter box (201), a second filter screen (204) is fixedly installed at the bottom of the first filter box (201) near the drain port (203), and a number of cleaning rollers (205) are rotatably connected to the top of the first filter box (201) near the second filter screen (204).

6. The multi-stage filtration and regeneration device for corrugated paper production wastewater according to claim 5, characterized in that: A cleaning motor (206) is fixedly installed on the outside of the first filter box (201). The output end of the cleaning motor (206) is fixedly connected to a cleaning roller (205) on one side. The ends of the two cleaning rollers (205) are fixedly connected to a sprocket drive assembly (207). A sprocket guard (208) is fixedly installed on the outside of the first filter box (201) near the sprocket drive assembly (207). An installation ring (209) is fixedly installed at the bottom of the first connecting pipe (202). A worm gear guard (226) is fixedly installed on one side of the installation ring (209).

7. The multi-stage filtration and regeneration device for corrugated paper production wastewater according to claim 6, characterized in that: The mounting ring (209) is symmetrically mounted with rotating brackets (210) on the inner side of the top of the worm gear guard (226). A rotating motor (211) is fixedly mounted on the outer side of one side of the rotating bracket (210). A rotating worm (212) is fixedly connected to the output end of the rotating motor (211). A rotating worm ring (213) is meshed with the bottom of the rotating worm ring (212). A filter screen (214) is fixedly mounted on one side of the rotating worm ring (213). The water guide cover (215) is rotatably connected to the filter screen (214). The water guide cover (215) is fixedly connected to the worm gear guard (226).

8. The multi-stage filtration and regeneration device for corrugated paper production wastewater according to claim 1, characterized in that: The water guide cover (215) is fixedly installed on the top of the water inlet valve (102). A fixed bracket (216) is fixedly installed on one side of the inside of the water guide cover (215). A conveying pipe (217) is fixedly installed on the outside of the water guide cover (215) near the fixed bracket (216). A sewage pipe (218) is fixedly installed on one side of the bottom of the conveying pipe (217). A conveying motor (219) is fixedly installed at the end of the conveying pipe (217). A conveying rotating rod (220) is fixedly connected to the output end of the conveying motor (219).

9. A multi-stage filtration and regeneration device for corrugated paper production wastewater according to claim 8, characterized in that: A conveying auger (221) is fixedly installed on the outside of the conveying rotating rod (220). The conveying rotating rod (220) is rotatably connected to the fixed bracket (216). A cleaning connecting shaft (222) is fixedly installed at the end of the conveying rotating rod (220). Several cleaning connecting brackets (223) are fixedly installed on the outside of the cleaning connecting shaft (222). A cleaning spiral blade (224) is fixedly installed on one side of the cleaning connecting bracket (223). A connecting rotating ring (225) is fixedly installed at the end of the cleaning spiral blade (224).

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