Desizing wastewater recycling system

Abstract

The application discloses a desizing wastewater recycling treatment system, and a sludge recycling treatment device comprises a wastewater treatment tank, a dewatering device, a crushing and drying device and a weighing device. The dewatering device comprises a centrifugal machine, a liquid return pipe is arranged on the centrifugal machine and is communicated with the wastewater treatment tank, a sewage discharge pipe is arranged on the wastewater treatment tank and penetrates into the centrifugal machine, a corresponding power assisting device is arranged on the sewage discharge pipe, a material dropping port is arranged on the centrifugal machine, a continuous sludge conveying device is arranged between the centrifugal machine and the crushing and drying device, the sludge conveying device corresponds to the material dropping port, and the weighing device is connected to the crushing and drying device. The supernatant treatment device comprises an adjusting tank, a pipeline mixer, a primary sedimentation tank, a biochemical tank, a secondary sedimentation tank, a tertiary sedimentation tank, a sludge tank, a Fenton reactor, a sludge adjusting tank and a filter press. A supernatant connecting pipe is arranged on the wastewater treatment tank and penetrates into the adjusting tank. The system can effectively recycle and treat the wastewater and sludge after desizing treatment, and improves the discharge quality.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of desizing wastewater, and particularly relates to a desizing wastewater recycling system. BACKGROUND

[0002] Desizing wastewater is wastewater containing fibers, precipitates, suspended solids and chemical substances generated in the process of pulp production. Desizing is to hydrolyze the pulp on the fabric with chemical agents to form soluble substances, and then remove them. Therefore, the acid precipitation method is needed to separate the solid and liquid of the wastewater. In the wastewater desizing wastewater treatment, the acid precipitation is mainly to change the acidity and alkalinity of the water body, so that some specific substances are converted from the dissolved state or colloidal state to the suspended state under this condition. Then the suspended substances are precipitated to form sludge, which is discharged for dewatering treatment. After the dewatering treatment, the final crushing and drying treatment is carried out to completely dry the moisture of the sludge and weigh it. In this way, the precise metering function can be realized when discharging, and the needs of discharge treatment operation management can be met. At present, the dewatering and weighing of the sludge in the operation process cannot realize automatic and continuous work, and manual transfer and conveying of the sludge after each step is completed are needed, which wastes manpower and material resources and is low in efficiency. After the acid precipitation method is completed, the wastewater still contains a large amount of active sludge and organic impurities that are difficult to handle, resulting in a high COD content of the discharged wastewater, which cannot improve the quality of the discharged wastewater and needs further treatment of the wastewater. SUMMARY

[0003] The technical problem to be solved by the present application is to provide a desizing wastewater recycling system, which can effectively recycle and treat the wastewater and sludge after desizing treatment and improve the discharge quality.

[0004] To solve the above technical problems, the technical scheme of the present application is: a desizing wastewater recycling treatment system, comprising a sludge recycling treatment device and a supernatant treatment device, the sludge recycling treatment device comprises a wastewater treatment tank, a dewatering device, a crushing and drying device and a weighing device, the dewatering device comprises a centrifugal machine, a liquid return pipe is arranged on the centrifugal machine and communicates with the wastewater treatment tank, a sewage discharge pipe is arranged on the wastewater treatment tank and extends into the centrifugal machine, a corresponding power assisting device is arranged on the sewage discharge pipe, a material dropping port is arranged on the centrifugal machine, a continuous sludge conveying device is arranged between the centrifugal machine and the crushing and drying device, the sludge conveying device corresponds to the material dropping port, and the weighing device is connected to the crushing and drying device; the supernatant treatment device comprises an adjusting tank, a pipeline mixer, an initial sedimentation tank, a biochemical tank, a secondary sedimentation tank, a tertiary sedimentation tank, a sludge tank, a Fenton reactor, a sludge adjusting tank and a filter press; a supernatant connecting pipe is arranged on the wastewater treatment tank and extends into the adjusting tank, a plurality of water inlet pipes are connected to the adjusting tank, and a flow regulating valve is arranged on each water inlet pipe; the outlet of the adjusting tank communicates with the water inlet of the pipeline mixer; the inlet of the initial sedimentation tank communicates with the water outlet of the pipeline mixer, the outlet of the initial sedimentation tank communicates with the inlet of the biochemical tank, the outlet of the biochemical tank communicates with the inlet of the secondary sedimentation tank, the outlet of the secondary sedimentation tank communicates with the raw water adding pipe of the Fenton reactor, the water outlet pipe of the Fenton reactor communicates with the inlet of the tertiary sedimentation tank, and the outlet of the tertiary sedimentation tank communicates with the outside; the initial sedimentation tank, the secondary sedimentation tank and the tertiary sedimentation tank are respectively provided with a first sludge discharge pipeline, a second sludge discharge pipeline and a third sludge discharge pipeline which communicate with the sludge tank, a first sludge return pipeline is arranged between the bottom of the secondary sedimentation tank and the initial sedimentation tank, a second sludge return pipeline for returning activated sludge is further arranged between the bottom of the secondary sedimentation tank and the biochemical tank, and a third sludge return pipeline is arranged between the bottom of the tertiary sedimentation tank and the initial sedimentation tank; a conveying pump is arranged on each of the first sludge discharge pipeline, the second sludge discharge pipeline, the third sludge discharge pipeline, the first sludge return pipeline, the second sludge return pipeline and the third sludge return pipeline; the sludge tank communicates with the sludge adjusting tank, the sludge adjusting tank communicates with the filter press, and the filtrate generated by the filter press respectively communicates with the dosing port of the pipeline mixer and the inlet of the initial sedimentation tank.

[0005] As a preferred scheme, a plurality of airflow pipes are uniformly arranged at the bottom of the wastewater treatment tank, a plurality of aeration discs are arranged on the airflow pipes, the airflow pipes are gathered at a total gas pipe, the total gas pipe communicates with an external air inlet pipe, an airflow control box for adjusting the airflow size in the air inlet pipe is arranged on the air inlet pipe, a rotating rod is rotatably connected to one side of the airflow control box, the rotating angle of the rotating rod corresponds to the airflow size of the air inlet pipe, a rotating adjusting structure for adjusting the rotating angle of the rotating rod is arranged on the rotating rod, the rotating angle of the rotating rod rotates with the change of the liquid level of the wastewater treatment tank, and a water outlet is arranged on the wastewater treatment tank to facilitate water drainage.

[0006] As a preferred scheme, the air flow control box comprises a rotating ball and an outer box body, the rotating ball is rotatably installed in the outer box body, the outer box body is provided with an air flow channel communicated with the air inlet pipeline, the rotating ball is provided with a through channel communicated with the air flow channel, the rotating ball is provided with a connecting shaft connected with a rotating rod, and the connecting shaft is provided with a reset structure; the rotating adjusting structure comprises a pulley fixed at the top of one side of the wastewater treatment tank, the wastewater treatment tank is provided with an adjusting floating ball, and the adjusting floating ball and the end of the rotating rod are connected through a traction rope.

[0007] As a preferred scheme, the crushing and drying device comprises a crushing box body, the crushing box body is fixedly installed on a crushing installation platform, a rotating shaft is rotatably installed in the crushing box body, the rotating shaft is provided with a crushing blade, a rotating power device for driving the rotating shaft to rotate is arranged at the top of the crushing box body, a stabilizing support for stabilizing the rotation of the rotating shaft is arranged in the crushing box body, a crushing inlet corresponding to the sludge conveying device and an exhaust port are further arranged at the top of the crushing box body, an openable and closable discharge port is arranged at the bottom of the crushing box body, a heating structure is arranged on the crushing box body, a flap valve is flange-connected to the discharge port of the crushing box body, and a bag clamping structure is flange-connected below the flap valve.

[0008] As a preferred scheme, the sludge conveying device comprises a sludge conveying belt and a screw conveyor, the screw conveyor is connected to the rear of the sludge conveying belt, and one end of the sludge conveying belt corresponds to the material falling port; the screw conveyor comprises a material falling hopper, a hopper support, a conveying pipe and a discharge pipe, a spiral shaft is rotatably installed in the conveying pipe, the material falling hopper and the discharge pipe are located at both ends of the conveying pipe, the material falling hopper corresponds to the sludge conveying belt, the discharge pipe corresponds to the crushing inlet, and stirring blades are arranged at the blade intervals of the spiral shaft; a spiral driving power device for driving the spiral shaft to rotate is arranged at the end of the conveying pipe.

[0009] As a preferred scheme, the bag clamping structure comprises a bag clamping pipe flange-connected to the flap valve, bag clamping claws matched with the bag clamping pipe are hingedly connected to the bag clamping pipe, opening and closing power devices for driving the bag clamping claws to open and close are hingedly connected to the bag clamping claws, and limiting structures for limiting the positions of the bag clamping claws are arranged on the bag clamping pipe; the weighing device comprises a weighing hopper accommodating the bag, the weighing hopper is fixedly installed on a weighing support through a weighing sensor, the weighing support is fixedly installed on a sliding block, the sliding block is slidingly installed on a sliding guide rail, the sliding guide rail is provided with a weighing station corresponding to the bag clamping pipe and a loading and unloading station, and the sliding block reciprocally moves through a sliding adjusting device.

[0010] As a preferred scheme, the Fenton reactor comprises a reaction tank and a base, the reaction tank is fixedly installed on the base, a water outlet pipe is arranged at the top of the reaction tank, a vent pipe is arranged at the bottom of the reaction tank, valves are arranged on the water outlet pipe and the vent pipe, a hydrogen peroxide adding pipeline, a divalent iron ion solution pipeline and a raw water adding pipeline are fixedly installed in the reaction tank, an up-and-down through liquid lifting pipe is suspendedly installed in the reaction tank, the outlet height of the liquid lifting pipe is lower than the height of the water outlet pipe, an air pipe for injecting air into the liquid lifting pipe is communicated in the liquid lifting pipe, and the air pipe is communicated with the outside through the reaction tank.

[0011] As a preferred scheme, the upper half of the liquid lifting pipe is provided with an air leakage hole, and a pipe flow blocking structure is arranged on the liquid lifting pipe to block the flow direction of the air leakage gas.

[0012] As a preferred scheme, the hydrogen peroxide adding pipeline and the raw water adding pipeline are respectively installed on both sides of the liquid lifting pipe, and the lower ends of the hydrogen peroxide adding pipeline and the raw water adding pipeline are higher than the lower end of the liquid lifting pipe.

[0013] As a preferred scheme, a shaft sleeve is fixedly installed on the pipe section of the liquid lifting pipe, a plurality of connecting rods are fixedly connected to the inner wall of the reaction tank on the shaft sleeve, and hollow channels are arranged on the connecting rods.

[0014] The effect of the present application is that the desizing wastewater recycling treatment system comprises a sludge recycling treatment device and a supernatant treatment device, the sludge recycling treatment device comprises a wastewater treatment tank, a dewatering device, a crushing and drying device and a weighing device, the dewatering device comprises a centrifugal machine, a liquid return pipe is arranged on the centrifugal machine and communicates with the wastewater treatment tank, a sewage discharge pipe is arranged on the wastewater treatment tank and extends into the centrifugal machine, a corresponding power-assisted power device is arranged on the sewage discharge pipe, a material dropping port is arranged on the centrifugal machine, a continuous sludge conveying device is arranged between the centrifugal machine and the crushing and drying device, the sludge conveying device corresponds to the material dropping port, and the crushing and drying device is connected with the weighing device below; the supernatant treatment device comprises an adjusting tank, a pipeline mixer, an initial sedimentation tank, a biochemical tank, a secondary sedimentation tank, a tertiary sedimentation tank, a sludge tank, a Fenton reactor, a sludge adjusting tank and a filter press; a supernatant connecting pipe is arranged on the wastewater treatment tank and extends into the adjusting tank, a plurality of water inlet pipes are connected to the adjusting tank, and a flow regulating valve is arranged on each water inlet pipe; the outlet of the adjusting tank communicates with the water inlet of the pipeline mixer; the inlet of the initial sedimentation tank communicates with the water outlet of the pipeline mixer, the outlet of the initial sedimentation tank communicates with the inlet of the biochemical tank, the outlet of the biochemical tank communicates with the inlet of the secondary sedimentation tank, the outlet of the secondary sedimentation tank communicates with the raw water adding pipe of the Fenton reactor, the water outlet pipe of the Fenton reactor communicates with the inlet of the tertiary sedimentation tank, and the outlet of the tertiary sedimentation tank communicates with the outside; the initial sedimentation tank, the secondary sedimentation tank and the tertiary sedimentation tank are respectively provided with a first sludge discharge pipeline, a second sludge discharge pipeline and a third sludge discharge pipeline which communicate with the sludge tank, a first sludge return pipeline is arranged between the bottom of the secondary sedimentation tank and the initial sedimentation tank, a second sludge return pipeline for returning activated sludge is further arranged between the bottom of the secondary sedimentation tank and the biochemical tank, and a third sludge return pipeline is arranged between the bottom of the tertiary sedimentation tank and the initial sedimentation tank; a conveying pump is arranged on each of the first sludge discharge pipeline, the second sludge discharge pipeline, the third sludge discharge pipeline, the first sludge return pipeline, the second sludge return pipeline and the third sludge return pipeline; the sludge tank communicates with the sludge adjusting tank, the sludge adjusting tank communicates with the filter press, and the filtrate generated by the filter press communicates with the dosing port of the pipeline mixer and the inlet of the initial sedimentation tank; firstly, wastewater is poured into the wastewater treatment tank, then acid precipitation treatment is performed, after the treatment is completed, sludge generated by solid-liquid separation is driven into the centrifugal machine through the power-assisted power device on the sewage discharge pipe to perform centrifugal dewatering, so that the sludge can be dewatered and the dewatered sludge can be dropped, the sludge dropped on the sludge conveying device is conveyed to the crushing and drying device to be crushed and dried, so that the drying efficiency of the sludge can be improved, and finally, the sludge is weighed to ensure accurate measurement of the sludge.The liquid separated from the solid-liquid separation in the wastewater treatment tank enters the conditioning tank from the supernatant connecting pipe, and other wastewater is also introduced into the conditioning tank. Then, the wastewater in the conditioning tank is mixed by the pipeline mixer and then enters the primary sedimentation tank for sedimentation. Since the supernatant in the wastewater treatment tank is the liquid after acid precipitation treatment, it is acidic, and the wastewater in the conditioning tank is alkaline, so they can react. The wastewater is precipitated in the primary sedimentation tank, and the precipitated sludge is directly discharged into the sludge tank. The liquid in the primary sedimentation tank enters the biochemical tank for further reaction, so that the organic matter in the liquid is decomposed and precipitated. The precipitated sludge enters the sludge tank, and the liquid in the secondary sedimentation tank enters the Fenton reactor for further reaction. Finally, the sludge is discharged into the sludge tank after the final sedimentation in the third sedimentation tank, and the liquid in the third sedimentation tank meets the discharge requirements. The sludge in the sludge tank enters the sludge conditioning tank and lime is added to stabilize and solidify the harmful substances in the sludge, which is easier to dewater and treat. Finally, the sludge is pressed by the filter press, and the filtrate is discharged. The filtrate is finally returned to the pipeline mixer or the primary sedimentation tank for recycling. The system can effectively recover and treat the wastewater and sludge after desizing treatment, and improve the discharge quality.

[0015] In addition, the wastewater treatment tank is uniformly arranged with a plurality of airflow pipes at the bottom, the airflow pipes are provided with a plurality of aeration discs, the airflow pipes are connected to a total gas pipe, the total gas pipe is connected to an external air inlet pipe, the air inlet pipe is provided with an airflow control box for adjusting the airflow size in the air inlet pipe, one side of the airflow control box is rotatably connected to a rotating rod, the rotating angle of the rotating rod corresponds to the airflow size of the air inlet pipe, the rotating rod is provided with a rotating adjusting structure for adjusting the rotating angle of the rotating rod, and the rotating angle of the rotating rod changes with the change of the liquid level of the wastewater treatment tank. The wastewater treatment tank is provided with a drain port for facilitating drainage. When wastewater is poured into the wastewater treatment tank and then subjected to acid precipitation treatment, the rotating adjusting structure adjusts the rotating rod to control the airflow size passing through the airflow control box, so that the airflow size is suitable for the amount of wastewater in the wastewater treatment tank. The airflow is dispersed to each airflow pipe through the total gas pipe, and the wastewater is disturbed by the aeration discs to achieve sufficient mixing and improve the use effect.

[0016] The air flow control box comprises a rotating ball and an outer box body, the rotating ball is rotatably installed in the outer box body, an air flow channel is arranged on the outer box body and communicates with the air inlet pipeline, a through channel is arranged in the rotating ball and communicates with the air flow channel, a connecting shaft is arranged on the rotating ball and connected with the rotating rod, and a reset structure is arranged on the connecting shaft; when the rotating rod rotates, the connecting shaft is driven to rotate, so that the rotating ball rotates, the through channel and the air flow channel are not completely communicated, the flow rate can be effectively adjusted, and the reset structure can ensure effective reset; the rotating adjustment structure comprises a pulley fixed at the top of one side of the wastewater treatment tank, an adjusting floating ball is arranged in the wastewater treatment tank, the adjusting floating ball and the end of the rotating rod are connected through a traction rope, and the traction rope passes through the pulley; the adjusting floating ball can effectively float in the wastewater treatment tank and rise and fall along with the liquid level, and when the adjusting floating ball falls, the rotating rod is pulled to swing upward, so that the rotating ball also rotates, the through channel deviates from the air flow channel, and the air flow is reduced; when the adjusting floating ball rises, the reset structure helps the rotating rod to reset, so that the through channel and the air flow channel can be accurately communicated, and the air flow is maximum.

[0017] The crushing and drying device comprises a crushing box body, the crushing box body is fixedly installed on a crushing installation platform, a rotating shaft is rotatably installed in the crushing box body, crushing blades are arranged on the rotating shaft, a rotating power device for driving the rotating shaft to rotate is arranged at the top of the crushing box body, a stabilizing support for stabilizing the rotation of the rotating shaft is arranged in the crushing box body, a crushing inlet corresponding to the sludge conveying device and an exhaust port are further arranged at the top of the crushing box body, an openable and closable discharge port is arranged at the bottom of the crushing box body, a heating structure is arranged on the crushing box body, a flap valve is flange-connected to the discharge port of the crushing box body, and a bag clamping structure is flange-connected below the flap valve; after the sludge enters the crushing box body from the crushing inlet, the rotating power device drives the rotating shaft to rotate, so that the crushing blades can crush the sludge, and the heating structure can heat and dry the crushed sludge, so that the efficiency is higher, the flap valve can effectively block the discharge port, so that the sludge is completely heated and dried before being discharged, and the bag clamping structure can effectively catch the sludge discharged from the discharge port, so that the metering accuracy is ensured.

[0018] The sludge conveying device comprises a sludge conveying belt and a screw conveyor, one end of the sludge conveying belt corresponds to the material dropping port, the screw conveyor is connected to the sludge conveying belt, the screw conveyor comprises a material dropping hopper, a hopper support, a conveying pipe and a discharging pipe, a screw shaft is rotatably arranged in the conveying pipe, the material dropping hopper and the discharging pipe are arranged at two ends of the conveying pipe, the material dropping hopper corresponds to the sludge conveying belt, the discharging pipe corresponds to the crushing inlet, the screw shaft is provided with stirring blades at intervals between blades, and the conveying pipe is provided with a screw driving power device for driving the screw shaft to rotate; since the centrifuge and the crushing box body are at a distance and have different heights, the centrifuge continuously drops material, and thus the sludge conveying belt needs to continuously convey the material, so that the conveying efficiency is improved, manual labor is saved, the material dropping hopper can effectively receive the sludge conveyed by the sludge conveying device for further conveying, and the stirring blades can preliminarily stir the sludge during conveying, so that the conveying effect is improved.

[0019] The bag clamping structure comprises a bag clamping pipe connected with the turnover valve flange, the bag clamping pipe is hingedly connected with a bag clamping claw matched with the bag clamping pipe, the bag clamping claw is hingedly connected with an opening and closing power device for driving the bag clamping claw to open and close, and the bag clamping pipe is further provided with a limiting structure for limiting the position of the bag clamping claw; the bag clamping claw is opened by the opening and closing power device, the bag is sleeved on the bag clamping pipe, and then the bag clamping claw is closed to fix the bag on the bag clamping pipe, so that the material dropping is accurate and the accuracy of weighing is ensured; the weighing device comprises a weighing hopper for accommodating the bag, the weighing hopper is fixedly installed on a weighing support through a weighing sensor, the weighing support is fixedly installed on a sliding block, the sliding block is slidingly installed on a sliding guide, the sliding guide is provided with a weighing station and a loading and unloading station corresponding to the bag clamping pipe, and the sliding block reciprocally moves through a sliding adjusting device; the weighing hopper is conveniently moved by sliding the sliding block, so that the bag in the weighing hopper is conveniently taken out and manual bag placing is facilitated.

[0020] And since the Fenton reactor comprises a reaction tank and a base, the reaction tank is fixedly installed on the base, a water outlet pipe is arranged at the top of the reaction tank, a vent pipe is arranged at the bottom of the reaction tank, valves are arranged on the water outlet pipe and the vent pipe, a hydrogen peroxide adding pipeline, a ferrous ion solution pipeline and a raw water adding pipeline are fixedly installed in the reaction tank, an up-and-down liquid lifting pipe is suspendedly installed in the reaction tank and penetrates the reaction tank, the height of the outlet of the liquid lifting pipe is lower than the height of the water outlet pipe, an air pipe for injecting air into the liquid lifting pipe is connected to the liquid lifting pipe, and the air pipe penetrates the reaction tank and communicates with the outside; the corresponding hydrogen peroxide, ferrous sulfate and liquid in the secondary sedimentation tank are added into the reaction tank through the hydrogen peroxide adding pipeline, the ferrous ion solution pipeline and the raw water adding pipeline, and start to react after contacting with each other, when the water level starts to rise and covers the liquid lifting pipe, the air pipe blows air into the liquid lifting pipe, so that bubbles are formed in the liquid lifting pipe and move upwards, which drives the water flow to flow out from the upper end outlet of the liquid lifting pipe, and the lower end outlet of the liquid lifting pipe flows into the liquid, so that the liquid in the reaction tank can be continuously circulated, at the same time, when the water level reaches the water outlet pipe, the valve of the water outlet pipe is opened to discharge water, and the liquid enters the tertiary sedimentation tank, when the hydrogen peroxide adding pipeline and the raw water adding pipeline add a certain amount of liquid, the water outlet pipe discharges a certain amount of liquid, at the same time, the air pipe intermittently injects air into the liquid lifting pipe, so that the liquid in the liquid lifting pipe is continuously driven to circulate, and the liquid reaction is sufficient.

[0021] And since the upper half of the liquid lifting pipe is provided with an air leakage hole, and a pipe section airflow blocking structure is arranged on the liquid lifting pipe to block the flow direction of the air leakage gas, the gas in the liquid lifting pipe can be discharged a little in the pipe section of the liquid lifting pipe, the liquid outside the liquid lifting pipe in the reaction tank is disturbed, and the reaction effect is further improved, at the same time, the pipe section airflow blocking structure can expand the flow range of the air leakage gas, and the flow range of the gas discharged from the top is also expanded, so that the liquid in the reaction tank is fully disturbed and fully reacted.

[0022] And since the hydrogen peroxide adding pipeline and the raw water adding pipeline are respectively installed on the two sides of the liquid lifting pipe, and the lower end of the hydrogen peroxide adding pipeline and the raw water adding pipeline is higher than the lower end of the liquid lifting pipe, the water flow can first react when entering the reaction tank, and then flow into the liquid lifting pipe, so that the water flow can be uniformly extracted when the liquid lifting pipe is extracted, and the reaction is more sufficient.

[0023] And since the liquid lifting pipe is fixedly installed on the base, the liquid lifting pipe is suspendedly installed in the reaction tank, and the hollow channels on the connecting rods can reduce the resistance of the water flow when circulating, so that the use effect is improved. BRIEF DESCRIPTION OF DRAWINGS

[0024] The application will be further described below in combination with the drawings and examples.

[0025] Figure 1 is a structural schematic diagram of an embodiment of the present application;

[0026] Figure 2 is a semi-sectional view of a wastewater treatment tank of an embodiment of the present application;

[0027] Figure 3 is a sectional view at the outer box of an embodiment of the present application;

[0028] Figure 4 is a sectional view of a centrifuge and sludge conveyor of an embodiment of the present application;

[0029] Figure 5 is a structural schematic diagram of a screw conveyor and crushing drying device of an embodiment of the present application

[0030] Figure 6 is a sectional view of a crushing drying device of an embodiment of the present application;

[0031] Figure 7 is a structural schematic diagram of the inside of a conveying pipe of a screw conveyor of an embodiment of the present application;

[0032] Figure 8 is a top view of a Fenton reactor of an embodiment of the present application;

[0033] Figure 9 is Figure 8 a sectional view at A-A;

[0034] In the drawings: 11, wastewater treatment tank; 12, air flow pipeline; 13, aeration disc; 14, total air pipe; 15, air flow control box; 16, rotating rod; 17, drainage port; 18, rotating sphere; 19, outer box; 110, air flow passage; 111, through passage; 112, connecting shaft; 113, pulley; 114, adjusting floating ball; 115, traction rope; 116, torsional spring; 117, upper limit block; 118, lower limit block; 119, sealing ring; 120, rotating bearing; 121, air inlet pipeline; 122, supernatant connecting pipe;

[0035] 21, centrifuge; 22, liquid return pipe; 23, sewage pipe; 24, material falling port; 25, crushing box; 26, crushing installation platform; 27, rotating shaft; 28, crushing blade; 29, stabilizing support; 210, crushing inlet; 211, exhaust port; 212, discharge port; 213, crushing rotating motor; 214, stabilizing bearing; 215, reversing valve; 216, conveyor frame; 217, sludge conveyor belt; 218, driving pulley; 219, driven pulley; 220, auxiliary pulley; 221, material blocking block; 222, material falling hopper; 223, hopper support; 224, conveying pipe; 225, discharge pipe; 226, screw shaft; 227, stirring blade; 228, screw drive motor; 229, bag clamping pipe; 230, bag clamping claw; 231, opening and closing cylinder; 232, weighing hopper; 233, weighing support; 234, sliding block; 235, sliding guide rail; 236, weighing station; 237, loading and unloading station; 238, electric heating ring; 239, limiting rod; 240, blade;

[0036] 31, reaction tank; 32, base; 33, water outlet pipe; 34, vent pipe; 35, valve; 36, hydrogen peroxide adding pipeline; 37, raw water adding pipeline; 38, liquid lifting pipe; 39, air pipe; 310, fixing plate; 311, air leakage hole; 312, pipe section air flow baffle; 313, support rod; 314, top end air flow baffle; 315, shaft sleeve; 316, connecting rod; 317, hollow channel; 318, ferrous ion solution pipeline;

[0037] 41, adjusting tank; 42, pipeline mixer; 43, primary sedimentation tank; 44, biochemical tank; 45, secondary sedimentation tank; 46, tertiary sedimentation tank; 47, sludge tank; 48, filter press; 49, sludge conditioning tank; 410, first sludge discharge pipeline; 411, second sludge discharge pipeline; 412, third sludge discharge pipeline; 413, first sludge return pipeline; 414, second sludge return pipeline; 415, third sludge return pipeline. DETAILED DESCRIPTION

[0038] The application will be further described in detail below through specific examples.

[0039] As Figures 1 to 9The application discloses a desizing wastewater recycling treatment system, which comprises a sludge recycling treatment device and a supernatant treatment device, wherein the sludge recycling treatment device comprises a wastewater treatment tank 11, a dewatering device, a crushing and drying device and a weighing device, the dewatering device comprises a centrifugal machine 21, a liquid return pipe 22 is arranged on the centrifugal machine 21 and communicates with the wastewater treatment tank 11, a sewage discharge pipe 23 is arranged on the wastewater treatment tank 11 and penetrates into the centrifugal machine 21, a corresponding power assisting device is arranged on the sewage discharge pipe 23, a material dropping port 24 is arranged on the centrifugal machine 21, a continuous sludge conveying device is arranged between the centrifugal machine 21 and the crushing and drying device, the sludge conveying device corresponds to the material dropping port 24, and the weighing device is connected to the crushing and drying device; the supernatant treatment device comprises an adjusting tank 41, a pipeline mixer 42, an initial sedimentation tank 43, a biochemical tank 44, a secondary sedimentation tank 45, a tertiary sedimentation tank 46, a sludge tank 47, a Fenton reactor, a sludge adjusting tank 49 and a filter press 48; the wastewater treatment tank 11 is provided with a supernatant connecting pipe 122 penetrating into the adjusting tank 41, the adjusting tank 41 is connected with a plurality of water inlet pipes, and a flow regulating valve is arranged on each water inlet pipe; the outlet of the adjusting tank 41 communicates with the water inlet of the pipeline mixer 42; the inlet of the initial sedimentation tank 43 communicates with the water outlet of the pipeline mixer 42, the outlet of the initial sedimentation tank 43 communicates with the inlet of the biochemical tank 44, the outlet of the biochemical tank 44 communicates with the inlet of the secondary sedimentation tank 45, the outlet of the secondary sedimentation tank 45 communicates with a raw water adding pipe of the Fenton reactor, the water outlet pipe 33 of the Fenton reactor communicates with the inlet of the tertiary sedimentation tank 46, and the outlet of the tertiary sedimentation tank 46 communicates with the outside; the initial sedimentation tank 43, the secondary sedimentation tank 45 and the tertiary sedimentation tank 46 are respectively provided with a first sludge discharge pipeline 410, a second sludge discharge pipeline 411 and a third sludge discharge pipeline 412 which communicate with the sludge tank 47, a first sludge return pipeline 413 is arranged between the bottom of the secondary sedimentation tank 45 and the initial sedimentation tank 43, a second sludge return pipeline 414 for returning activated sludge is further arranged between the bottom of the secondary sedimentation tank 45 and the biochemical tank 44, and a third sludge return pipeline 415 is arranged between the bottom of the tertiary sedimentation tank 46 and the initial sedimentation tank 43; conveying pumps are arranged on the first sludge discharge pipeline 410, the second sludge discharge pipeline 411, the third sludge discharge pipeline 412, the first sludge return pipeline 413, the second sludge return pipeline 414 and the third sludge return pipeline 415; the sludge tank 47 communicates with the sludge adjusting tank 49, the sludge adjusting tank 49 communicates with the filter press 48, and the filtrate generated by the filter press 48 respectively communicates with a dosing port of the pipeline mixer 42 and the inlet of the initial sedimentation tank 43.

[0040] In the embodiment, the wastewater treatment tank 11 is uniformly arranged with several air flow pipes 12 at the bottom, the air flow pipes 12 are provided with several aeration discs 13, the air flow pipes 12 are gathered to a total air pipe 14, the total air pipe 14 is communicated with an external air inlet pipe 121, the air inlet pipe 121 is provided with an air flow control box 15 for adjusting the air flow size in the air inlet pipe 121, one side of the air flow control box 15 is rotatably connected with a rotating rod 16, the rotating angle of the rotating rod 16 corresponds to the air flow size of the air inlet pipe, the rotating rod 16 is provided with a rotating adjusting structure for adjusting the angle of the rotating rod 16, the rotating angle of the rotating rod 16 is rotated with the change of the liquid level of the wastewater treatment tank 11, the wastewater treatment tank 11 is provided with a water outlet 17 for facilitating water drainage, the wastewater treatment tank 11 is provided with three rows of air flow pipes 12 at the bottom, and the three rows of air flow pipes 110 are communicated with each other, four aeration discs 13 are installed on each air flow pipe 110, so that the aeration discs 13 are uniformly distributed in the wastewater treatment tank 11, and the aeration disc 13 is of an existing structure, which is not described in detail herein.

[0041] As shown in Figure 3 The air flow control box 15 comprises a rotating ball 18 and an outer box 19, the rotating ball 18 is rotatably installed in the outer box 19, the outer box 19 is provided with an air flow channel 110 communicated with the air inlet pipe 121, the rotating ball is provided with a through channel 111 communicated with the air flow channel 110, the rotating ball 18 is provided with a connecting shaft 112 connected with the rotating rod 16, and the connecting shaft 112 is provided with a reset structure; the outer box 19 is arranged above the air inlet pipe 121 for convenient adjustment, and the rotating ball 18 is connected with the rotating rod 16, so that when the rotating rod 16 is rotated, the rotating ball 18 is also rotated, so that the corresponding through channel 111 and air flow channel 110 are deviated, resulting in the reduction of air flow, so as to change the size of aeration; the reset structure can ensure effective reset.

[0042] As shown in Figure 2As shown, the rotation adjusting structure comprises a pulley 113 fixed at the top of one side of the wastewater treatment tank 11, and an adjusting floating ball 114 is arranged in the wastewater treatment tank 11, the adjusting floating ball 114 and the end of the rotating rod 16 are connected through a traction rope 115, and the traction rope 115 passes through the pulley 113; the adjusting floating ball 114 can effectively float in the wastewater treatment tank 11 and rise and fall along with the liquid level, and through the traction rope 115 and the pulley 113, when the adjusting floating ball 114 falls, the rotating rod 16 is pulled to swing upward, so that the rotating ball 18 also rotates, the through channel 111 deviates from the airflow channel 110, and the airflow is reduced; when the adjusting floating ball 114 rises, the reset structure helps the rotating rod 16 to reset, so that the through channel 111 and the airflow channel 110 can be accurately connected, and the airflow is maximum; in this way, the adjusting floating ball 114 can adjust the aeration size along with the change of the liquid level, improve the use effect, and ensure that the wastewater treatment tank 11 can fully mix and react.

[0043] Further, the reset structure comprises a torsion spring 116, the torsion spring 116 is sleeved on the connecting shaft 112, one end of the torsion spring 116 is fixed with the rotating rod 16, and the other end of the torsion spring 116 is fixed with the outer box body 19; when the adjusting floating ball 114 drives the rotating rod 16 to rotate, the torsion spring 116 is deformed under force, and the airflow is adjusted at this time, and the rotating rod 16 cannot be reset under the force of the torsion spring 116, when the adjusting floating ball 114 rises, the rotating rod 16 loses traction, and the torsion spring 116 can drive the rotating rod 16 to reset, so that the airflow is maximum.

[0044] In the embodiment, the outer box body 19 is provided with a limiting block for limiting the rotating rod 16, the limiting block comprises an upper limiting block 117 and a lower limiting block 118, the lower limiting block 118 is located below the rotating rod 16 and the through channel 111 and the airflow channel 110 are fully opened, and the upper limiting block 117 is located above the rotating rod 16 and the through channel 111 and the airflow channel 110 reach the hole for the minimum airflow flow; since the through channel 111 and the airflow channel 110 need to ensure a certain opening connection, the rotating ball 18 does not need a large rotating range, the rotating angle of the rotating ball 18 can be limited by limiting the swing angle of the rotating rod 16 through the upper limiting block 117 and the lower limiting block 118, so that the rotating rod 16 can rotate accurately during use, and the airflow can effectively pass through.

[0045] The rotating ball 18 is provided with a sealing ring 119 on both sides of the through channel 111, and a rotating bearing 120 is arranged between the connecting shaft 112 and the outer box body 19; the sealing ring 119 ensures good sealing effect of the airflow conveying, and the rotating bearing 120 facilitates the rotation of the connecting shaft 112 and reduces wear.

[0046] As Figure 6As shown, the crushing drying device comprises a crushing box 25 fixedly installed on a crushing installation platform 26, a rotating shaft 27 rotatably installed in the crushing box 25, a crushing blade 28 arranged on the rotating shaft 27, a rotating power device arranged at the top of the crushing box 25 for driving the rotating shaft 27 to rotate, a stabilizing support 29 arranged in the crushing box 25 for stabilizing the rotation of the rotating shaft 27, a crushing inlet 210 and an exhaust port 211 arranged at the top of the crushing box 25 and corresponding to the sludge conveying device, an openable and closable discharge port 212 arranged at the bottom of the crushing box 25, a heating structure arranged on the crushing box 25, a flap valve 215 flange-connected to the discharge port 212 of the crushing box 25, and a bag clamping structure flange-connected to the flap valve 215. The rotating power device comprises a crushing rotating motor 213 fixedly installed at the top of the crushing box 25, and the stabilizing support 29 is arranged at the bottom of the crushing box 25 to effectively support the rotating shaft 27, and a stabilizing bearing 214 is arranged on the stabilizing support 29 to facilitate the rotation of the rotating shaft 27. In this way, the rotating shaft 27 penetrates through the top of the crushing box 25 and is supported by the stabilizing support 29 to ensure stable rotation, and the crushing blade 28 can effectively stir and scatter the sludge to improve the drying efficiency. An exhaust pump is arranged at the exhaust port 211 to effectively exhaust the water vapor emitted by the heated sludge. The flap valve 215 can effectively block the discharge port 212, and the bag clamping structure can effectively catch the sludge discharged from the discharge port 212 to ensure accurate measurement. The flap valve 215 is a commercially available structure, and therefore is not described in detail herein.

[0047] As Figure 4 and Figure 7As shown, the sludge conveying device comprises a sludge conveyor belt 217 and a screw conveyor which is connected behind the sludge conveyor belt 217, one end of the sludge conveyor belt 217 corresponding to the material dropping port 24; the screw conveyor comprises a material dropping hopper 222, a hopper support 223, a conveying pipe 224 and a discharging pipe 225, a screw shaft 226 being rotatably installed in the conveying pipe 224, the material dropping hopper 222 and the discharging pipe 225 being located at two ends of the conveying pipe 224, the material dropping hopper 222 corresponding to the sludge conveyor belt 217, the discharging pipe 225 corresponding to the crushing inlet 210, the screw shaft 226 being provided with an agitating blade 227 at intervals between the blades 240, and the conveying pipe 224 being provided at an end thereof with a screw driving power device for driving the screw shaft 226 to rotate; since the centrifuge 21 is apart from the crushing box 25 by a distance and has different height, the centrifuge 21 continuously drops material, so the sludge conveyor belt 217 needs to continuously convey the material, which can improve the conveying efficiency and save labor; the sludge conveyor belt 217 is arranged on a conveyor frame 216, the conveyor frame 216 being provided with a driving pulley 218, a driven pulley 219 and an auxiliary pulley 220, the driving pulley 218 being driven to rotate by a pulley rotating motor, the sludge conveyor belt 217 changing the conveying direction by the auxiliary pulley 220 to ensure the conveying accuracy, and the sludge conveyor belt 217 being provided with material blocking blocks 221 on both sides thereof to prevent the sludge from flowing to both sides during conveying, further ensuring the conveying accuracy; the screw driving power device comprises a screw driving motor 228 which is fixedly installed at a top end of the conveying pipe 224 and drives the screw shaft 226 to rotate, and the blades 240 on the screw shaft 226 thus rotate to push the sludge, and the agitating blade 227 also stirs the conveyed sludge when the screw shaft 226 rotates, ensuring that the sludge particles are not too large during conveying and improving the conveying effect.

[0048] As Figure 5 and Figure 6As shown, the bag clamping structure comprises a bag clamping pipe 229 connected with the flange of the turnover valve 215, a bag clamping claw 230 hinged with the bag clamping pipe 229, an opening and closing power device for driving the bag clamping claw 230 to open and close, and a limiting structure for limiting the position of the bag clamping claw 230 on the bag clamping pipe 229; the weighing device comprises a weighing hopper 232 for accommodating the bag, the weighing hopper 232 is fixedly installed on a weighing support 233 through a weighing sensor, the weighing support 233 is fixedly installed on a sliding block 234, the sliding block 234 is slidingly installed on a sliding guide rail 235, the sliding guide rail 235 is provided with a weighing station 236 and a loading and unloading station 237 corresponding to the bag clamping pipe 229, and the sliding block 234 moves back and forth through a sliding adjusting device; the opening and closing power device comprises an opening and closing cylinder 231, the bag clamping claw 230 is two and symmetrically hinged on the bag clamping pipe 229, the tail of the opening and closing cylinder 231 is hinged in the middle of one of the bag clamping claws 230, the telescopic end of the opening and closing cylinder 231 is hinged in the middle of the other bag clamping claw 230, and the opening and closing cylinder 231 is also provided with two, which are respectively located on the two sides of the bag clamping claw 230, so that the clamping effect is improved; and the sliding adjusting device is manually moved, when the weighing hopper 232 is at the loading and unloading station 237, the bag is placed in the weighing hopper 232, then the weighing hopper 232 is moved to the weighing station 236, and then the bag opening is fixed on the bag clamping pipe 229 through the bag clamping claw 230, so that the clamping is effectively completed, the weighing is simultaneously performed, and after the weighing is completed, the bag clamping claw is loosened, so that the weighing hopper 232 is pushed back to the loading and unloading station 237, the bag containing the sludge is conveniently taken out, a new bag is re-placed, and the weighing sensor is a structure existing on the market, so it is not described in detail herein.

[0049] In the embodiment, the heating structure comprises an electric heating coil 238 wrapped on the crushing box 25; the electric heating coil 238 is attached to the crushing box 25, can continuously heat the inside of the crushing box 25, so that the heating is simple and convenient, and the sludge is effectively dried.

[0050] Further, the limiting structure comprises a limiting rod 239 fixedly installed on the bag clamping pipe 229, and the limiting rod 239 is located outside the bag clamping claw 230; when the bag opening is sleeved on the bag clamping pipe 229, the bag clamping claw 230 does not need to be opened too large, so that the opening and closing time is reduced, so that when the bag clamping claws 230 are opened to each other, the bag clamping claws 230 will be topped to the limiting rod 239, so that the opening and closing cannot be continuously performed, thereby completing the limiting.

[0051] As shown in the figure, Figure 8 and Figure 9As shown, the Fenton reactor comprises a reaction tank 31 and a base 32, the reaction tank 31 is fixedly installed on the base 32, the top of the reaction tank 31 is provided with a water outlet pipe 33, the bottom of the reaction tank 31 is provided with a vent pipe 34, the water outlet pipe 33 and the vent pipe 34 are both provided with valves 35, the reaction tank 31 is fixedly installed with a hydrogen peroxide adding pipeline 36, a divalent iron ion solution pipeline 318 and a raw water adding pipeline 37, the reaction tank 31 is also suspendedly installed with an up-and-down penetrating liquid lifting pipe 38, the outlet height of the liquid lifting pipe 38 is lower than the height of the water outlet pipe 33, the liquid lifting pipe 38 is communicated with an air pipe 39 for injecting gas into the liquid lifting pipe 38, the air pipe 39 penetrates the reaction tank 31 and communicates with the outside; the hydrogen peroxide adding pipeline 36 and the divalent iron ion solution pipeline 318 are fixedly installed in the reaction tank 31 through a fixed plate 310, the fixed plate 310 is fixedly installed on the side wall of the reaction tank 31, and the raw water adding pipeline 37 is fixedly installed in the middle of the reaction tank 31; in this way, when the raw water adding pipeline 37 communicates with the secondary sedimentation tank 45, the wastewater enters the reaction tank 31 and is fully reacted to improve the treatment effect of the wastewater.

[0052] In the embodiment, the upper half of the pipe section of the liquid lifting pipe 38 is provided with a gas leakage hole 311, and a pipe section airflow blocking structure is arranged on the pipe section of the liquid lifting pipe 38 to block the flow direction of the gas leakage from the gas leakage hole 311; the top of the liquid lifting pipe 38 is provided with a top airflow blocking structure; two gas leakage holes 311 are arranged on the pipe section of the liquid lifting pipe 38 and are symmetrically arranged, so that part of the gas can leak out of the liquid lifting pipe 38 when the gas passes through the gas leakage hole 311, thereby disturbing the outside and further improving the reaction effect; meanwhile, the pipe section airflow blocking structure can expand the flow range of the gas when the gas is discharged from the gas leakage hole 311; similarly, the top airflow blocking structure can also expand the flow range of the gas when the gas is discharged from the top, thereby fully disturbing the liquid in the reaction tank 31 and fully reacting.

[0053] The pipe section airflow blocking structure comprises a pipe section airflow baffle 312 fixedly installed on the pipe section of the liquid lifting pipe 38, and the pipe section airflow baffle 312 is in a conical ring structure; the pipe section airflow baffle 312 is effectively supported by a support rod 313 protruding from the liquid lifting pipe 38; the top airflow blocking structure comprises a top airflow baffle 314 fixedly installed on the top of the liquid lifting pipe 38, and the top airflow baffle 314 is in a conical structure; the top of the liquid lifting pipe 38 is also provided with a support rod 313 for supporting the top airflow baffle 314, so as to increase the resistance of the gas flowing upward from the liquid, thereby increasing the disturbance effect; meanwhile, the liquid lifting pipe 38 can avoid increasing the resistance of the liquid extraction when extracting the liquid, thereby facilitating the formation of a circulating water flow and improving the use effect.

[0054] The hydrogen peroxide adding pipe 36 and the raw water adding pipe 37 are installed on both sides of the riser pipe 38, and the lower ends of the hydrogen peroxide adding pipe 36 and the raw water adding pipe 37 are higher than the lower end of the riser pipe 38; thus, the water flow can be reacted first when entering the reaction tank 31, and then can flow into the riser pipe 38, and the uniform extraction can be ensured at both ends of the riser pipe 38, so that the reaction can be more sufficient.

[0055] The shaft sleeve 315 is fixedly installed on the pipe section of the riser pipe 38, the connecting rods 316 fixedly connected with the inner wall of the reaction tank 31 are arranged on the shaft sleeve 315, and the hollow passages 317 are arranged on the connecting rods 316; thus, the riser pipe 38 can be suspendedly installed in the reaction tank 31, and the hollow passages 317 on the connecting rods 316 can reduce the resistance of the water flow circulation and improve the use effect.

[0056] The adjusting tank 41 is connected with other waste water, and sludge and supernatant are formed after the waste water in the waste water treatment tank 11 is treated. The supernatant is treated effectively, and is introduced into the adjusting tank 41 through the supernatant connecting pipe 122, and then is fully mixed by the pipe mixer 42. The pipe mixer 42 is a structure existing in the market, and thus is not described in detail. Since the supernatant is acidic and the other waste water is alkaline, the waste water is introduced into the primary settling tank 43 to start the waste water treatment, and sludge is generated in the waste water and is precipitated. The sludge in the primary settling tank 43 is introduced into the sludge tank 47, and then the waste water in the primary settling tank 43 is continuously introduced into the biochemical tank 44 to further react, and is introduced into the secondary settling tank 45 to decompose and precipitate the organic matter in the liquid. When the waste water is not fully reacted, the waste water is returned to the biochemical tank 44 to be re-reacted, the sludge in the secondary settling tank 45 is introduced into the sludge tank 47, and the waste water in the secondary settling tank 45 is introduced into the Fenton reactor to perform Fenton reaction, so that the content of the organic matter in the waste water is further reduced. Finally, the waste water is introduced into the tertiary settling tank 46 to be precipitated. When the waste water in the tertiary settling tank 46 meets the discharge requirements, the waste water is discharged, the sludge in the tertiary settling tank 46 is introduced into the sludge tank 47, and when the waste water in the secondary settling tank 45 and the tertiary settling tank is not fully reacted, the waste water is returned to the primary settling tank 43 to be treated again, until the waste water meets the discharge requirements. The sludge in the sludge tank 47 is introduced into the sludge adjusting tank 49 and lime is added, so that the harmful substances in the sludge are stabilized and solidified, and the sludge is more easily dewatered and treated. Finally, the sludge is separated into filtrate and filter residue by the filter press 48, the filter residue is discharged, and the filtrate is returned to the pipe mixer 42 or the primary settling tank 43 to be recycled.

[0057] The above-described embodiments are only preferred embodiments of the present application, and do not limit the scope of the present application. Various modifications and improvements of the technical solutions of the present application, which are made without departing from the design spirit of the present application, should fall into the protection scope of the present application.

Claims

1. A desizing wastewater recovery treatment system comprising a sludge recovery treatment device and a supernatant treatment device, characterized by: The sludge recycling device comprises a wastewater treatment tank, a dewatering device, a crushing and drying device and a weighing device, the dewatering device comprises a centrifugal machine, a liquid return pipe is arranged on the centrifugal machine and communicates with the wastewater treatment tank, a sewage discharge pipe is arranged on the wastewater treatment tank and penetrates into the centrifugal machine, a corresponding power assisting device is arranged on the sewage discharge pipe, a material dropping port is arranged on the centrifugal machine, a continuous sludge conveying device is arranged between the centrifugal machine and the crushing and drying device, the sludge conveying device corresponds to the material dropping port, and the weighing device is connected to the crushing and drying device, The supernatant treatment device comprises an adjusting tank, a pipeline mixer, an initial sedimentation tank, a biochemical tank, a secondary sedimentation tank, a tertiary sedimentation tank, a sludge tank, a Fenton reactor, a sludge adjusting tank and a filter press; a supernatant connecting pipe is arranged on the wastewater treatment tank and penetrates into the adjusting tank, a plurality of water inlet pipes are connected to the adjusting tank, and a flow adjusting valve is arranged on each water inlet pipe; the outlet of the adjusting tank communicates with the water inlet of the pipeline mixer; the inlet of the initial sedimentation tank communicates with the water outlet of the pipeline mixer, the outlet of the initial sedimentation tank communicates with the inlet of the biochemical tank, the outlet of the biochemical tank communicates with the inlet of the secondary sedimentation tank, the outlet of the secondary sedimentation tank communicates with the raw water adding pipe of the Fenton reactor, the water outlet pipe of the Fenton reactor communicates with the inlet of the tertiary sedimentation tank, and the outlet of the tertiary sedimentation tank communicates with the outside world; the initial sedimentation tank, the secondary sedimentation tank and the tertiary sedimentation tank are respectively provided with a first sludge discharge pipeline, a second sludge discharge pipeline and a third sludge discharge pipeline which communicate with the sludge tank, a first sludge return pipeline is arranged between the bottom of the secondary sedimentation tank and the initial sedimentation tank, a second sludge return pipeline for returning activated sludge is further arranged between the bottom of the secondary sedimentation tank and the biochemical tank, and a third sludge return pipeline is arranged between the bottom of the tertiary sedimentation tank and the initial sedimentation tank; a conveying pump is arranged on each of the first sludge discharge pipeline, the second sludge discharge pipeline, the third sludge discharge pipeline, the first sludge return pipeline, the second sludge return pipeline and the third sludge return pipeline; the sludge tank communicates with the sludge adjusting tank, the sludge adjusting tank communicates with the filter press, and the filtrate generated by the filter press respectively communicates with the dosing port of the pipeline mixer and the inlet of the initial sedimentation tank, A plurality of airflow pipes are uniformly arranged on the bottom of the wastewater treatment tank, a plurality of aeration discs are arranged on the airflow pipes, the airflow pipes are gathered at a total gas pipe, the total gas pipe communicates with an external air inlet pipe, an airflow control box for adjusting the airflow size in the air inlet pipe is arranged on the air inlet pipe, a rotating rod is rotatably connected to one side of the airflow control box, the rotating angle of the rotating rod corresponds to the airflow size of the air inlet pipe, a rotating adjusting structure for adjusting the angle of the rotating rod is arranged on the rotating rod, the rotating angle of the rotating rod rotates with the change of the liquid level of the wastewater treatment tank, and a water outlet is arranged on the wastewater treatment tank for facilitating water drainage The air flow control box comprises a rotating ball and an outer box body, the rotating ball is rotatably installed in the outer box body, the outer box body is provided with an air flow channel communicated with an air inlet pipe, the rotating ball is provided with a through channel communicated with the air flow channel, the rotating ball is provided with a connecting shaft connected with a rotating rod, and the connecting shaft is provided with a reset structure; the rotating adjusting structure comprises a pulley fixed at the top of one side of the wastewater treatment tank, the wastewater treatment tank is provided with an adjusting floating ball, the adjusting floating ball and the end of the rotating rod are connected through a traction rope, the traction rope passes through the pulley, The reset structure comprises a torsion spring, the torsion spring is sleeved on the connecting shaft, one end of the torsion spring is fixed with the rotating rod, and the other end of the torsion spring is fixed with the outer box body; The outer box body is provided with a limiting block for limiting the rotating rod, the limiting block comprises an upper limiting block and a lower limiting block, the lower limiting block is located below the rotating rod, and the upper limiting block is located above the rotating rod; The rotating ball is provided with a sealing ring on both sides of the through channel, and a rotating bearing is arranged between the connecting shaft and the outer box body.

2. A desizing wastewater recovery treatment system as claimed in claim 1, characterized by: The crushing and drying device comprises a crushing box body, the crushing box body is fixedly installed on a crushing installation platform, a rotating shaft is rotatably installed in the crushing box body, a crushing blade is arranged on the rotating shaft, a rotating power device for driving the rotating shaft to rotate is arranged on the top of the crushing box body, a stabilizing support for stabilizing the rotation of the rotating shaft is arranged in the crushing box body, a crushing inlet corresponding to the sludge conveying device and an exhaust port are further arranged on the top of the crushing box body, an openable and closable discharge port is arranged at the bottom of the crushing box body, a heating structure is arranged on the crushing box body, a flange of the discharge port of the crushing box body is connected with a turnover valve, and a bag clamping structure is connected with the flange below the turnover valve.

3. A desizing wastewater recovery treatment system as claimed in claim 2, characterized by: The sludge conveying device comprises a sludge conveying belt and a screw conveyor, the screw conveyor is connected behind the sludge conveying belt, and one end of the sludge conveying belt corresponds to the material falling port; the screw conveyor comprises a material falling hopper, a hopper support, a conveying pipe and a discharge pipe, a spiral shaft is rotatably installed in the conveying pipe, the material falling hopper and the discharge pipe are located at both ends of the conveying pipe, the material falling hopper corresponds to the sludge conveying belt, the discharge pipe corresponds to the crushing inlet, stirring blades are arranged at the blade intervals of the spiral shaft, and a spiral driving power device for driving the spiral shaft to rotate is arranged at the end of the conveying pipe.

4. A desizing wastewater recovery treatment system as claimed in claim 3, characterized by: The bag clamping structure comprises a bag clamping pipe connected with the flange of the turnover valve, bag clamping claws matched with the bag clamping pipe are hingedly connected to the bag clamping pipe, opening and closing power devices for driving the bag clamping claws to open and close are hingedly connected to the bag clamping claws, and limiting structures for limiting the positions of the bag clamping claws are further arranged on the bag clamping pipe; the weighing device comprises a weighing hopper for containing the bag, the weighing hopper is fixedly installed on a weighing support through a weighing sensor, the weighing support is fixedly installed on a sliding block, the sliding block is slidingly installed on a sliding guide rail, the sliding guide rail is provided with a weighing station corresponding to the bag clamping pipe and a loading and unloading station, and the sliding block reciprocatingly moves through a sliding adjusting device.

5. A desizing wastewater recovery treatment system as defined in claim 1, wherein: The Fenton reactor comprises a reaction tank and a base, the reaction tank is fixedly installed on the base, a water outlet pipe is arranged on the top end of the reaction tank, a vent pipe is arranged on the bottom of the reaction tank, valves are arranged on the water outlet pipe and the vent pipe, a hydrogen peroxide adding pipeline, a divalent iron ion solution pipeline and a raw water adding pipeline are fixedly installed in the reaction tank, an up-and-down liquid lifting pipe is suspendedly installed in the reaction tank, the outlet height of the liquid lifting pipe is lower than the height of the water outlet pipe, an air pipe for injecting air into the liquid lifting pipe is communicated in the liquid lifting pipe, and the air pipe penetrates through the reaction tank and is communicated with the outside.

6. A desizing wastewater recovery treatment system as claimed in claim 5, characterized by: An air leakage hole is arranged on the upper half of the liquid lifting pipe, and a pipe flow blocking structure is arranged on the liquid lifting pipe to block the flow direction of the air leakage gas.

7. A desizing wastewater recovery treatment system as defined in claim 6, characterized by: The hydrogen peroxide adding pipeline and the raw water adding pipeline are respectively installed on the two sides of the liquid lifting pipe, and the lower end of the hydrogen peroxide adding pipeline and the raw water adding pipeline is higher than the lower end of the liquid lifting pipe.

8. A desizing wastewater recovery treatment system as claimed in claim 7, characterized by: An axle sleeve is fixedly installed on the pipe section of the liquid lifting pipe, a plurality of connecting rods are fixedly connected with the inner wall of the reaction tank on the axle sleeve, and hollow channels are arranged on the connecting rods.

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