CN111646650A - A sewage and sludge treatment system and its hydraulic cavitation sludge reduction machine - Google Patents

Abstract

The invention discloses a sewage and sludge treatment system and a hydraulic cavitation sludge reduction machine. The system includes a biochemical reaction tank, a secondary sedimentation tank, a sludge tank, a sludge homogenization tank and a sludge dewatering machine. The sludge tank is provided with a return sludge conveying pipeline, a return sludge lifting pump is installed in the return sludge conveying pipeline, and the output end of the return sludge conveying pipeline is connected with the sewage inlet pipeline of the biochemical reaction tank; The sedimentation tank is connected with the pipeline, the secondary sedimentation tank is provided with a treated water discharge pipeline and a sewage outlet pipeline, and the sewage outlet pipeline is connected with the sludge tank; The quality pool is connected; the sewage and sludge treatment system is equipped with a hydraulic cavitation sludge reducer, and the mixed liquid containing the sludge to be treated is pumped into the hydraulic cavitation sludge reducer for treatment, so that the organic matter is more easily decomposed by biochemical action, and the pollution is realized. Sludge reduction, after using this system, the sludge output can be reduced by 50-70%.

Description

A sewage and sludge treatment system and its hydraulic cavitation sludge reduction machine

technical field

The invention relates to the technical field of sewage and sludge treatment, in particular to a sewage and sludge treatment system and a hydraulic cavitation sludge reducer.

Background technique

At present, a large amount of excess sludge will be produced in the process of biochemical treatment of urban sewage and industrial organic wastewater. Generally speaking, about 5-10 tons of mud cake with a moisture content of 80% will be produced during the treatment process for every 10,000 m ³ of sewage. This kind of sludge contains harmful substances such as pathogens, heavy metals and persistent organic compounds. Sludge is mostly piled up naturally and has not been properly disposed of.

At present, the main sludge treatment technologies at home and abroad are: incineration, landfill, anaerobic digestion, aerobic fermentation, thermal drying lime stabilization, sludge pyrolysis, hydrothermal treatment and other methods. All belong to the terminal treatment technology after sludge is produced. These treatment methods will bring huge equipment investment and high operating costs, and at the same time, will also produce secondary pollution and ecological safety risks. On average, 80% of the mud cake is produced every day in my country, which is more than 500,000 tons. Due to the high cost of transportation, storage, treatment and disposal of this sludge, and there is currently no cost-effective treatment and disposal method, the amount of this sludge treated by composting, incineration and pyrolysis is less than 5%, and most of the sludge is still natural. Stacking or throwing in disorder will cause great harm to the environment. Therefore, a device for reducing sludge production is needed, especially in the process of sewage treatment, which can reduce sludge production and realize source emission reduction. It is imminent and necessary to carry out clean production.

The working principle of many current series combined cavitation equipment and device patents is: when the mixed liquid to be treated flows at a high speed through a multi-stage shrinking nozzle or orifice plate, etc., a hydraulic cavitation effect is generated to degrade the pollutants in the mixed liquid. . Theoretically, the series combination of multi-stage shrinking spray group and orifice plate will produce a synergistic effect, strengthen the intensity of cavitation, and enhance the degradation of pollutants. However, in practical applications, the multi-stage series combined cavitation device or equipment has the following shortcomings:

1. The series connection of nozzles or orifice plates requires extremely high performance parameters and power of the transfer pump. It is difficult to achieve the flow rate and pressure conditions of the ideal cavitation intensity at each stage at the same time, and the adjustment is extremely difficult;

2. In reality, the pollutant mixture to be treated is often complex in composition, containing many large solids and long flocs, etc., which can easily block the equipment, resulting in high equipment maintenance frequency and large maintenance costs;

3. The greater the strength of hydraulic cavitation, the shorter the life of wearing parts and need to be replaced regularly, while the series combined cavitation equipment is often difficult to maintain.

Therefore it is necessary to improve.

SUMMARY OF THE INVENTION

In view of the deficiencies in the prior art, the purpose of the present invention is to provide a sewage and sludge treatment system and a hydraulic cavitation sludge reducer for the system, which simplifies the structural design and improves the cavitation efficiency.

In order to achieve the above purpose, the technical solution adopted in the present invention is

A sewage and sludge treatment system, comprising a biochemical reaction tank, a secondary sedimentation tank, a sludge tank, a sludge homogenization tank and a sludge dewatering machine connected in sequence through pipelines,

The sludge tank is provided with a return sludge conveying pipeline, a return sludge lifting pump is installed in the return sludge conveying pipeline, and the output end of the return sludge conveying pipeline is connected with the sewage inlet pipeline of the biochemical reaction tank;

The biochemical reaction tank is connected with the secondary sedimentation tank pipeline, the secondary sedimentation tank is provided with a treated water discharge pipeline and a sewage outlet pipeline, and the sewage outlet pipeline is connected with the sludge tank;

The sludge tank is provided with an excess sludge pump, the output end of the excess sludge pump is connected with the sludge homogenization tank, and the output end of the sludge homogenization tank is connected with the sludge dewatering machine;

The sewage and sludge treatment system is provided with a hydraulic cavitation sludge reducing machine.

In a further technical solution, the sludge tank pipeline is connected with a sewage pump, the input end of the sewage pump is provided with a suction pipeline, the input end of the suction pipeline is communicated with the sludge tank, and the output end of the sewage pump is provided with a lifting pressure. Pipeline, the output end of the lifting and pressurizing pipeline is connected with the input end of the hydraulic cavitation sludge reduction machine, the water outlet of the hydraulic cavitation sludge reduction machine is provided with an output pipeline, and the output end of the output pipeline is connected with the sludge tank.

In a further technical solution, the pipeline of the biochemical reaction tank is connected with a sewage pump, the input end of the sewage pump is provided with a suction pipeline, the input end of the suction pipeline is communicated with the biochemical reaction tank, and the output end of the sewage pump is provided with a lifting and pressurizing pipeline. Pipeline, the output end of the lifting and pressurizing pipeline is connected with the input end of the hydraulic cavitation sludge reduction machine, the water outlet of the hydraulic cavitation sludge reduction machine is provided with an output pipeline, and the output end of the output pipeline is connected with the biochemical reaction pool.

In a further technical solution, a sewage pump is connected to the pipeline of the sludge homogenization tank, the input end of the sewage pump is provided with a suction pipeline, the input end of the suction pipeline is communicated with the sludge homogenization tank, and the output end of the sewage pump is provided with a suction pipeline. There is a lifting pressure pipeline, the output end of the lifting pressure pipeline is connected with the input end of the hydraulic cavitation sludge reduction machine, the water outlet of the hydraulic cavitation sludge reduction machine is provided with an output pipeline, and the output end of the output pipeline is connected with the sewage. The sludge homogenization tank is connected, and the sludge homogenization tank is provided with an overflow pipeline, and the output end of the overflow pipeline is connected with the biochemical reaction tank.

A hydraulic cavitation and sludge reduction machine for sewage and sludge treatment systems, comprising a shell and a cavitation ejector, the bottom of the shell is provided with a water outlet; the upper end of the shell is provided with at least two cavitation ejectors, the shell is installed There is a bracket, the upper end of the bracket is provided with a pulverizing baffle corresponding to the cavitation ejector, the output end of each cavitation ejector faces a pulverizing baffle, the bottom of the bracket is equipped with a rotating shaft, and the bottom of the rotating shaft extends into A cavitation inducing impeller is installed in the water outlet;

The cavitation ejector includes a shrinking nozzle and a nozzle, the input end of the shrinking nozzle is connected with the output end of the liquid feed pump, the output end of the shrinking nozzle is connected with the nozzle, and the output end of the nozzle faces the pulverizing baffle.

When the cavitation ejector pushes the crushing baffle to rotate, the rotating shaft drives the cavitation induction impeller to rotate.

In a further technical solution, the bracket includes a mounting frame and a fixing frame, the bottom of the fixing piece is mounted on the inner wall of the housing, and the mounting frame is mounted on the fixing frame.

In a further technical solution, the pulverizing baffle plate is recessed inward to form a conical groove, and the conical angle is 30-60°.

In a further technical solution, the rotating shaft penetrates through the top of the fixing frame and is connected to the mounting frame. When the cavitation ejector pushes the pulverizing baffle to rotate, the rotating shaft drives the cavitation inducing impeller to rotate.

In a further technical solution, a spiral guide vane body is built in the shrinking nozzle, and the nozzle is a hollow tubular structure.

In a further technical solution, a spiral guide vane body is built in the nozzle, and the shrinking nozzle is a hollow cone-shaped structure.

After the above structure is adopted, the advantages of the present invention compared with the prior art are: during the use of the present invention, the mixed liquid forms a high-speed jet in the cavitation ejector and impinges on the corresponding pulverizing baffles, so that the mixed liquid is formed in the cavitation ejector. The large granular sludge flocs and part of the sludge cells are broken, and then enter the lower part of the shell, and are discharged through the water outlet through the cavitation induced impeller to generate cavitation. Small footprint, simple structure, and reduced production costs. The sewage and sludge treatment system is equipped with a hydraulic cavitation sludge reducer, and the mixed liquid containing sludge to be treated is pumped into the hydraulic cavitation sludge reducer for treatment, so that the organic matter is more easily decomposed through biochemical action, and the sludge reduction is realized. , after using the system, the sludge output can be reduced by 50-70%.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is a flow chart of Embodiment 1 of a sewage and sludge treatment system of the present invention;

2 is a flow chart of Embodiment 2 of a sewage and sludge treatment system according to the present invention;

3 is a flow chart of Embodiment 3 of a sewage and sludge treatment system of the present invention;

Fig. 4 is the structural schematic diagram of hydraulic cavitation sludge reduction machine;

Fig. 5 is the top view of hydraulic cavitation sludge reducing machine;

Figure 6 is a structural diagram of a cavitation injector;

Figure 7 is a structural diagram of a conical cavitation inducing disc;

Figure 8 is a cross-sectional view of a hydraulic cavitation sludge reducer;

Fig. 9 is the working schematic diagram of hydraulic cavitation sludge reduction machine;

Fig. 10 is another structural schematic diagram of the cavitation ejector;

Fig. 11 is another structural schematic diagram of the hydraulic cavitation sludge reducer.

Detailed ways

The following descriptions are only preferred embodiments of the present invention, and therefore do not limit the protection scope of the present invention.

Example 1

As shown in Figure 1, a sewage and sludge treatment system includes a biochemical reaction tank 7, a secondary sedimentation tank 8, a sludge tank 5, a sludge homogenization tank 10 and a sludge dewatering machine 11 connected by pipelines in sequence,

The sludge tank 5 is provided with a return sludge conveying pipeline 14 , the return sludge conveying pipeline 14 is equipped with a return sludge lifting pump 6 , and the output end of the return sludge conveying pipeline 14 is connected with the sewage inlet pipeline of the biochemical reaction tank 7 ; The modified sludge in the sludge tank 5 is sent to the biochemical reaction tank 7 through the return sludge lift pump 6 through the return sludge transport pipeline 14 for biochemical treatment.

The biochemical reaction tank 7 is connected to the secondary sedimentation tank 8 by pipelines, and the secondary sedimentation tank 8 is provided with a treated water discharge pipeline and a sewage outlet pipeline, and the sewage outlet pipeline is communicated with the sludge tank 5; It is sent to the secondary sedimentation tank 8, and the secondary sedimentation tank 8 sends the sedimented sludge into the sludge tank 5, and discharges the treated water.

The sludge tank 5 is provided with an excess sludge pump 9, the output end of the excess sludge pump 9 is connected with the sludge homogenization tank 10, and the output end of the sludge homogenization tank 10 is connected with the sludge dewatering machine 11; 9. The sludge in the sludge tank 5 is sent into the sludge homogenization tank 10, and the sludge homogenization tank 10 sends the sludge into the sludge dehydrator 11 for dehydration treatment, and the sludge is discharged after the treatment is completed.

The sewage and sludge treatment system is provided with a hydraulic cavitation sludge reduction machine 3 .

The sludge tank 5 is connected with a sewage pump 1, the input end of the sewage pump 1 is provided with a suction pipeline 13, the input end of the suction pipeline 13 is communicated with the sludge tank 5, and the output end of the sewage pump 1 is provided with a lifting pump. Pressure pipeline 2, the output end of the lifting and pressurizing pipeline 2 is communicated with the input end of the hydraulic cavitation sludge reduction machine 3, the water outlet of the hydraulic cavitation sludge reduction machine 3 is provided with an output pipeline 4, and the output of the output pipeline 4 The end is communicated with the sludge tank 5 .

The suction pipeline 13 of the sewage pump 1 sends 50-80% of the sludge in the sludge tank 5 to the hydraulic cavitation sludge reduction machine 3 for cavitation treatment, and 80-100% of the modified excess sludge after cavitation treatment After being pumped into the sludge homogenization tank 10 by the excess sludge pump 9, the sludge dehydrator 11 performs dehydration treatment.

Example 2

As shown in FIG. 2 , the difference between this embodiment and Embodiment 1 is that the biochemical reaction tank 7 is connected with a sewage pump 1 , the input end of the sewage pump 1 is provided with a suction line 13 , and the input end of the suction line 13 is provided with a suction line 13 . Connected with the biochemical reaction tank 7, the output end of the sewage pump 1 is provided with a lifting and pressurizing pipeline 2, and the output end of the lifting and pressurizing pipeline 2 is communicated with the input end of the hydraulic cavitation sludge reduction machine 3. The hydraulic cavitation sludge reduction machine The water outlet of 3 is provided with an output pipeline 4 , and the output end of the output pipeline 4 is communicated with the biochemical reaction tank 7 .

The suction pipeline 13 of the sludge pump 1 sends 80-100% of the sewage in the biochemical reaction tank 7 into the hydraulic cavitation sludge reduction machine 3 for cavitation treatment. After the cavitation treatment, the sewage passes through the secondary sedimentation tank 8 for sedimentation After that, the clean water is discharged, and the sediment at the bottom of the secondary sedimentation tank 8 is compressed and refluxed into the sludge tank 5. The sludge tank 5 returns 30-100% of the sludge to the biochemical reaction tank 7 for processing, and 0-30% of the sludge is returned to the biochemical reaction tank 7 for treatment. The excess sludge is sent to the sludge dehydrator 11 for processing.

Example 3

As shown in FIG. 3 , the difference between this embodiment and Embodiment 1 is that the sludge homogenization tank 10 is connected with a sewage pump 1 , and the input end of the sewage pump 1 is provided with a suction pipeline 13 , and the suction pipeline 13 is The input end is communicated with the sludge homogenization tank 10, the output end of the sewage pump 1 is provided with a lifting and pressurizing pipeline 2, and the output end of the lifting and pressurizing pipeline 2 is communicated with the input end of the hydraulic cavitation sludge reduction machine 3. The water outlet of the sludge reduction machine 3 is provided with an output pipeline 4 , and the output end of the output pipeline 4 is communicated with the sludge homogenization tank 10 .

The sludge pump 1 sends 100% of the sludge in the sludge homogenization tank 10 to the hydraulic cavitation sludge reduction machine 3 for cavitation treatment. After the treatment is completed, it is sent back to the sludge homogenization tank 10. The treated sludge flows to the biochemical tank 7 through the overflow pipe 15 for biochemical treatment again, and the remaining treated sludge is treated by the sludge dewatering machine 11 .

After being treated by this system, the output of sludge is reduced by 50-70%.

Example 4

As shown in FIGS. 4 to 9 , a hydraulic cavitation sludge reduction machine for sewage and sludge treatment systems includes a casing 1 and a cavitation ejector 2 . The bottom of the casing 1 has a water outlet 11 ; the upper end of the casing 1 At least two cavitation ejectors 2 are arranged in the upper part of the casing 1, and a bracket 31 is installed on the casing 1. The upper end of the bracket 31 is provided with a crushing baffle 3 corresponding to the cavitation ejector 2. The output end of each cavitation ejector 2 The bottom of the bracket 31 is installed with a rotating shaft 22, and the bottom of the rotating shaft 22 extends into the water outlet 11 and is installed with a cavitation inducing impeller 4;

The cavitation ejector 2 includes a constricting nozzle 22 and a nozzle 21, the input end of the constricting nozzle 22 is connected with the output end of the liquid feed pump, the output end of the constricting nozzle 22 is communicated with the nozzle 21, and the output end of the nozzle 21 faces the Smash baffle 3.

When the cavitation ejector 2 pushes the crushing baffle 3 to rotate, the rotating shaft 22 drives the cavitation inducing impeller 4 to rotate.

The cavitation-inducing impeller 4 rotates with the high-speed rotation of the rotating pulverizing baffle 3, and cooperates with the narrowing structure of the casing 1 to generate surrounding flow and vortex, which enhances the secondary cavitation and makes the large particles in the mixed liquid polluted. Sludge flocs and some sludge cells are further broken down.

During the use process of the present invention, the mixed liquid forms a high-speed jet in the cavitation ejector 2 and impinges on the corresponding crushing baffle 3, so that the large-particle sludge flocs and part of the sludge cells in the mixed liquid are broken, and then enter the shell. Below the body 1, the cavitation inducing impeller 4 produces cavitation in the shot socket and then discharges through the water outlet 11. The present invention has high cavitation efficiency, is not easy to block, low maintenance cost, and small footprint.

The bracket 31 includes an installation frame 311 and a fixing frame 312 , the bottom of the fixing piece is installed on the inner wall of the housing 1 , and the installation frame 311 is installed on the fixing frame 312 .

The crushing baffle plate 3 is recessed inward to form a conical groove, and the conical angle is 30-60°. The crushing and cavitation of the mixed liquid can be enhanced by the crushing baffle 3 with conical grooves.

The rotating shaft 22 penetrates through the top of the fixing frame 312 and is connected to the mounting frame. When the cavitation ejector 2 pushes the crushing baffle 3 to rotate, the rotating shaft 22 drives the cavitation inducing impeller 4 to rotate. The cavitation inducing impeller 4 has two or three impeller blades, and the maximum diameter of the cavitation inducing impeller does not exceed 80% of the inner diameter of the water outlet 11; It rotates and rotates, and cooperates with the narrowing structure of the cavity wall 1 to generate surrounding flow and vortex, enhance the secondary cavitation, and further break the large-granular sludge flocs and some sludge cells in the mixed liquid.

The constricting nozzle 22 has a built-in spiral guide vane 221, and the nozzle 21 is a hollow tubular structure. The height of the helical guide vane body 221 does not exceed 1/2 of the inner diameter D of the shrinking nozzle 22, and the helix angle of the helical guide vane body 221 is between 48° and 70°; the helical guide vane body 221 consists of three When the spiral guide vane is formed, the length of the spiral guide vane body 221 does not exceed 1/2 lead; when the spiral guide vane body 221 is formed of two spiral guide vanes, the length of the spiral guide vane body 221 does not exceed 1/2 lead. 3/4 lead. The liquid in the shrinking nozzle 22 is further compressed by the helical guide vane body 211 , so as to accelerate the speed of liquid ejection and enhance cavitation.

The invention adopts the combination of parallel and series to realize multi-stage cavitation, because the cavitation effect of each stage is different, and the coordination of cavitation of each stage is optimized. First, a plurality of nozzles 21 are connected in parallel to realize jet cavitation, and at the same time, the high-speed jets of the nozzles 21 hit the corresponding crushing baffles 3 to crush the large-particle sludge flocs, and make full preparations for subsequent cavitation to crack the pollutants; second, The lower end of the rotating shaft 22 of the crushing baffle 3 is connected to the cavitation inducing impeller 4 to improve the strength of the subsequent jet cavitation. The synergistic and continuous action of the above multi-stage cavitation greatly improves the treatment efficiency of the pollutant mixture, reduces the performance requirements for a single pump, the parameter adjustment becomes simple, the anti-clogging effect is good, and the maintenance becomes easier. Lower usage fees.

Example 5

As shown in FIGS. 10 to 11 , the difference between this embodiment and Embodiment 1 is that a spiral guide vane body 211 is built in the nozzle 21 , and the shrinking nozzle 22 is a hollow cone-shaped structure. The height of the helical guide vane body 221 does not exceed 1/2 of the inner diameter D of the shrinking nozzle 22, and the helix angle of the helical guide vane body 221 is between 48° and 70°; the helical guide vane body 221 consists of three When the spiral guide vane is formed, the length of the spiral guide vane body 221 does not exceed 1/2 lead; when the spiral guide vane body 221 is formed of two spiral guide vanes, the length of the spiral guide vane body 221 does not exceed 1/2 lead. 3/4 lead. The liquid in the shrinking nozzle 22 is further compressed by the helical guide vane body 211 , so as to accelerate the speed of liquid ejection and enhance cavitation.

The hydraulic cavitation sludge reducer of the present invention is a comprehensive hydraulic cavitation practical equipment, and the working principle is shown in Figure 7: the sludge mixture with a certain flow and pressure provided by the non-clogging sewage pump enters the cavitation ejector 2 at a high speed, and the The chemical ejector 2 produces cavitation and shoots out at a high speed to impact the crushing baffle 3 to achieve the first pretreatment of the sludge mixed solution, so as to achieve the crushing of large-particle sludge flocs and become a secondary The cavitation effect provides sufficient pressure and flow ratio. Next, secondary jet vortex cavitation is generated in the funnel-shaped structure at the lower end of the sludge reducer 3, and the sludge mixed liquid pretreated by the cavitation ejector 2 is more fully treated, so as to improve the The one-time processing efficiency of the muddy water by the mud reducer 3. By adding a conical cavitation inducing disc 4 to the water outlet 11 at the lower end of the sludge reducer 3, more intense vortex cavitation can be generated.

After the sludge mixed liquid is treated by 3 or more stages of cavitation in the hydraulic cavitation sludge reducer, the sludge flocs become fragmented, and the refractory organic matter in it is directly decomposed into C0 ₂ and H ₂ 0, and the refractory organic matter macromolecular chain It is broken into small molecular chains and then oxidized into fatty acids, thereby improving the biodegradability of sewage organic matter. At the same time, the cavitation is accompanied by a strong shock wave micro-jet, and it occurs continuously at tens of thousands of times per second, bringing about a high-efficiency mechanical chopping effect, and generating a free radical -OH with high chemical activity, which is then combined with organic compounds in the solution. The pollutants undergo oxidation reaction, and the organic pollutants in the mixed liquid are oxidized and decomposed into low molecular weight substances. The strong hydraulic shear force generated by shock waves and high-speed micro-jets in the mixed liquid can effectively destroy the sludge structure and make the macromolecular main chain. The carbon bonds on it are broken and converted into short-chain low-molecular-weight organic matter, so that the intracellular solute flows out and is further decomposed, creating favorable conditions for subsequent biochemical reactions, making the organic matter easier to decompose and reducing through biochemical action, and achieving sludge reduction change. After the sewage plant uses this method, the sludge output can be reduced by more than 50-70%.

The above contents are only preferred embodiments of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific embodiments and application scope. limits.

Claims (10)

1. The utility model provides a sewage, sludge treatment system which characterized in that: comprises a biochemical reaction tank (7), a secondary sedimentation tank (8), a sludge tank (5), a sludge homogenizing tank (10) and a sludge dewatering machine (11) which are connected in sequence through pipelines,

the sludge tank (5) is provided with a return sludge conveying pipeline (14), the return sludge conveying pipeline (14) is provided with a return sludge lifting pump (6), and the output end of the return sludge conveying pipeline (14) is connected with a sewage inlet pipeline of the biochemical reaction tank (7);

the biochemical reaction tank (7) is connected with a secondary sedimentation tank (8) through a pipeline, the secondary sedimentation tank (8) is provided with a treated water discharge pipeline and a sewage outlet pipeline, and the sewage outlet pipeline is communicated with the sludge tank (5);

the sludge tank (5) is provided with an excess sludge pump (9), the output end of the excess sludge pump (9) is communicated with a sludge homogenizing tank (10), and the output end of the sludge homogenizing tank (10) is connected with a sludge dewatering machine (11);

the sewage and sludge treatment system is provided with a hydrodynamic cavitation mud reducing machine (3).

2. The sewage sludge treatment system of claim 1 wherein: sludge impoundment (5) pipe connection has dredge pump (1), the input of dredge pump (1) is provided with suction line (13), the input and sludge impoundment (5) the intercommunication of suction line (13), the output of dredge pump (1) is provided with promotes pressurization pipeline (2), the output that promotes pressurization pipeline (2) and the input intercommunication of hydrodynamic cavitation mud reducer (3), the delivery port of hydrodynamic cavitation mud reducer (3) is provided with output pipeline (4), the output and sludge impoundment (5) the intercommunication of output pipeline (4).

3. The sewage and sludge treatment system of claim 1, wherein: the biochemical reaction tank (7) is connected with a sewage pump (1) through a pipeline, the input end of the sewage pump (1) is provided with a suction pipeline (13), the input end of the suction pipeline (13) is communicated with the biochemical reaction tank (7), the output end of the sewage pump (1) is provided with a lifting and pressurizing pipeline (2), the output end of the lifting and pressurizing pipeline (2) is communicated with the input end of the hydrodynamic cavitation mud reducing machine (3), the water outlet of the hydrodynamic cavitation mud reducing machine (3) is provided with an output pipeline (4), and the output end of the output pipeline (4) is communicated with the biochemical reaction tank (7).

4. The sewage and sludge treatment system of claim 1, wherein: the sludge homogenizing tank (10) is connected with a sewage pump (1) through a pipeline, an intake pipeline (13) is arranged at the input end of the sewage pump (1), the input end of the intake pipeline (13) is communicated with the sludge homogenizing tank (10), a lifting and pressurizing pipeline (2) is arranged at the output end of the sewage pump (1), the output end of the lifting and pressurizing pipeline (2) is communicated with the input end of the hydrodynamic cavitation sludge reducing machine (3), an output pipeline (4) is arranged at the water outlet of the hydrodynamic cavitation sludge reducing machine (3), the output end of the output pipeline (4) is communicated with the sludge homogenizing tank (10), an overflow pipeline (15) is arranged in the sludge homogenizing tank (10), and the output end of the overflow pipeline (15) is communicated with the biochemical reaction tank (7).

5. The utility model provides a sewage, sludge treatment system's hydrodynamic cavitation subtracts mud machine, includes casing (1) and cavitation sprayer (2), its characterized in that: the bottom of the shell (1) is provided with a water outlet (11); the upper end part of the shell (1) is provided with at least two cavitation ejectors (2), the shell (1) is provided with a support (31), the upper end part of the support (31) is provided with a crushing baffle (3) corresponding to the cavitation ejectors (2), the output end of each cavitation ejector (2) faces one crushing baffle (3), the bottom of the support (31) is provided with a rotating shaft (22), and the bottom of the rotating shaft (22) extends into the water outlet (11) and is provided with a cavitation induction impeller (4);

cavitation sprayer (2) are connected with the output of feed liquor pump including shrink spray tube (22) and nozzle (21), the input of shrink spray tube (22), and the output and nozzle (21) intercommunication of shrink spray tube (22), the output orientation of nozzle (21) smash baffle (3).

When the cavitation ejector (2) pushes the crushing baffle (3) to rotate, the rotating shaft (22) drives the cavitation induction impeller (4) to rotate.

6. The hydrodynamic cavitation mud reducer of sewage and sludge treatment system as claimed in claim 5, wherein: the support (31) comprises a mounting rack (311) and a fixing rack (312), the bottom of the fixing piece is mounted on the inner wall of the shell (1), and the mounting rack (311) is mounted on the fixing rack (312).

7. The hydrodynamic cavitation mud reducer of sewage and sludge treatment system as claimed in claim 6, wherein: the crushing baffle (3) is inwards recessed to form a conical groove, and the cone angle is 30-60 degrees.

8. The hydrodynamic cavitation mud reducer of sewage and sludge treatment system as claimed in claim 7, wherein: the rotating shaft (22) penetrates through the top of the fixing frame (312) and is connected with the mounting frame, and when the cavitation ejector (2) pushes the crushing baffle (3) to rotate, the rotating shaft (22) drives the cavitation induction impeller (4) to rotate.

9. The hydrodynamic cavitation mud reducer of sewage and sludge treatment system as claimed in claim 5, wherein: a spiral guide vane body (221) is arranged in the contraction spray pipe (22), and the spray nozzle (21) is of a hollow tubular structure.

10. The hydrodynamic cavitation mud reducer of sewage and sludge treatment system as claimed in claim 5, wherein: the nozzle (21) is internally provided with a spiral guide vane body (211), and the contraction spray pipe (22) is of a hollow cone-shaped structure.

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