Method and device for reducing biochemical sludge

Abstract

The invention discloses a method and device for reducing biochemical sludge, and relates to the technical field of biochemical sludge treatment.The method comprises the following specific steps that 1, equipment is installed; step 2, spraying; 3, cavitation is carried out; and step 4, degrading. By arranging a protection mechanism and a displacement mechanism, a protection barrel is inserted into a reaction barrel, a through hole is aligned with a liquid discharge pipe, the liquid discharge pipe is rotated to face upwards, a vertical barrel slides into a circular groove under the action of gravity, the protection barrel is positioned in the reaction barrel, then a mounting sleeve is in threaded connection with the outer wall of the liquid discharge pipe, and a displacement frame is displaced to make contact with the vertical barrel; the vertical cylinder is pressed in the circular groove, so that the protective cylinder is fixed, then the side plate moves into the mounting groove, and the side plate and the reaction cylinder are combined to form a cavitation cavity, so that the inner cavity of the reaction cylinder is conveniently protected by arranging the protective cylinder, and meanwhile, the protective cylinder can be quickly replaced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of biochemical sludge treatment, and particularly relates to a method and device for biochemical sludge reduction. BACKGROUND

[0002] Biochemical sludge refers to a black or grayish white colloidal substance generated through biological treatment during wastewater treatment. The sludge is rich in microorganisms and their metabolites, and contains varying degrees of organic matter. Biochemical sludge has strong biodegradation and can effectively decompose and remove organic matter in wastewater. Biochemical sludge has good colonization and can adhere well to activated sludge particles, thereby improving the effect of wastewater treatment. Biochemical sludge can adapt to changes in water quality and sewage quality and has good adaptability.

[0003] When treating biochemical sludge, a hydrodynamic cavitation device is used. Sewage is sprayed into a cavitation chamber through symmetrical nozzles for cavitation reaction. However, when the cavitation bubble breaks, due to the inertia and compressibility of the substances inside the bubble, a huge implosion force is generated, causing local hot spots and releasing a huge amount of energy, which can easily damage the inner cavity of the cavitation chamber. The overall replacement cost is high. In order to conveniently protect the inner cavity of the cavitation chamber, a method and device for biochemical sludge reduction are provided. SUMMARY

[0004] The purpose of the present application is to provide a method and device for biochemical sludge reduction in order to conveniently protect the inner cavity of the cavitation chamber.

[0005] To achieve the above purpose, the present application provides the following technical solution: a method for biochemical sludge reduction, the specific steps are as follows: Step 1: Equipment installation, install a hydrodynamic cavitation device on the reflux pipeline of the sludge pool and the biological pool; Step 2: Spray, sewage enters the pressure equalizing chamber, flows into two separate flow pipes through the connecting pipes, and then enters the cavitation chamber at high speed through symmetrical precision nozzles; Step 3: Cavitation, negative pressure is generated in the precision nozzle, and air bubbles are quickly formed. When rotating and colliding, the air bubbles quickly break, and cavitation occurs near the outlet of the cavitation chamber, generating strong energy and destroying the substances in the fluid. The large clusters of microorganisms in the sludge can be dispersed, the zooglea can be destroyed, and the cell walls of the microorganisms can be broken, and the extracellular polymers attached to the cell walls can be destroyed; Step 4: Degradation, the activated sludge treated by hydrodynamic cavitation is returned to the biological pool and is more easily degraded, and provides carbon source for the activated microorganisms. This not only facilitates subsequent sludge reduction, but also greatly reduces carbon source input.

[0006] The utility model provides a device for biochemical sludge reduction, and a hydraulic cavitation device comprises a liquid inlet pipe and a backflow pipe, the top of the liquid inlet pipe is fixedly connected with an equalizing chamber, the equalizing chamber is fixedly connected with a connecting pipe on both sides, one end of the connecting pipe is provided with a shunt pipe, the outer wall of the shunt pipe is fixedly connected with a side plate, a reaction cylinder is arranged between the two side plates, the cavitation chamber is composed of the two side plates and the reaction cylinder, a precision nozzle is arranged on one end of the shunt pipe in the inner cavity of the reaction cylinder, the top of the reaction cylinder is fixedly connected with a liquid outlet pipe, the backflow pipe is arranged on the top of the liquid outlet pipe, the inner cavity of the reaction cylinder is protected through a protection mechanism, and the shunt pipe is displaced through a displacement mechanism.

[0007] As a further scheme of the utility model: the protection mechanism includes a protection cylinder, the protection cylinder is slidably connected to the inner wall of the reaction cylinder, a circular groove is formed in the outer wall of the protection cylinder, a through hole is formed in the bottom of the circular groove, installation grooves are symmetrically formed in the two sides of the reaction cylinder, a second sealing ring is arranged on the inner wall of the installation groove, a sliding groove is formed in the inner part of the liquid outlet pipe, a vertical cylinder is slidably connected to the inner wall of the sliding groove, an installation sleeve is rotatably connected to the outer wall of the backflow pipe, plug blocks are symmetrically fixed to the bottom of the backflow pipe, a first sealing ring is arranged on the outer side of the plug blocks at the bottom of the backflow pipe, an insertion slot is formed in the top of the liquid outlet pipe, and a displacement frame is slidably connected to the inner wall of the insertion slot and extends into the inner cavity of the sliding groove.

[0008] As a further scheme of the utility model: the displacement mechanism includes a first docking plate, the first docking plate is fixedly connected to one end of the shunt pipe towards the connecting pipe, a second docking plate is fixedly connected to one end of the connecting pipe towards the shunt pipe, limit holes and threaded holes are formed in the outer wall of the first docking plate, a limit rod is fixedly connected to the outer wall of the second docking plate, a rotating column is rotatably connected to the outer wall of the second docking plate above the connecting pipe, a first threaded rod is fixedly connected to one end of the rotating column, a first bevel gear is fixedly connected to the other end of the rotating column, the first bevel gear is located in the inner cavity of the equalizing chamber, a second bevel gear is rotatably connected to the outer wall of the first bevel gear in the inner part of the equalizing chamber, a second threaded rod is fixedly connected to the bottom of the second bevel gear, a baffle is slidably connected to the inner part of the equalizing chamber and slidably connected to the outer wall of the second threaded rod.

[0009] As a further scheme of the utility model: the outer wall of the side plate is matched with the inner wall of the installation groove.

[0010] As a further scheme of the utility model: the inner wall of the installation sleeve is provided with internal threads, the outer wall of the liquid outlet pipe is provided with external threads, the external threads are matched with the internal threads, and the outer wall of the plug block is matched with the inner wall of the insertion slot.

[0011] As a further scheme of the present application: the outer wall of the protection cylinder is attached to the inner wall of the reaction cylinder, the outer wall of the vertical cylinder is attached to the inner wall of the chute, and the outer wall of the bottom of the vertical cylinder is attached to the inner wall of the circular groove.

[0012] As a further scheme of the present application: the inner wall of the limiting hole is attached to the outer wall of the limiting rod, and the threaded hole is matched with the first threaded rod.

[0013] As a further scheme of the present application: the first bevel gear is engaged with the second bevel gear, and the inner wall of the baffle is provided with threads matched with the second threaded rod.

[0014] As a further scheme of the present application: the first and second abutting plates are provided with third sealing rings at the ends close to each other.

[0015] Compared with the prior art, the present application has the following advantages: By setting the protection mechanism and displacement mechanism, the protection cylinder is inserted into the reaction cylinder, the through hole is aligned with the drainage pipe, the drainage pipe is rotated upward, the vertical cylinder is slid into the circular groove under the action of gravity, the protection cylinder is positioned in the reaction cylinder, then the mounting sleeve is threadedly connected to the outer wall of the drainage pipe, the displacement frame is displaced to contact the vertical cylinder, and the vertical cylinder is pressed in the circular groove, so that the protection cylinder is fixed, then the side plate is displaced into the mounting groove, and the side plate and the reaction cylinder are combined to form a cavitation chamber, which is convenient for protecting the inner cavity of the reaction cylinder by setting the protection cylinder, and the protection cylinder can be quickly replaced. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 The figure is a structural schematic diagram of the present application. Figure 2 The figure is an installation schematic diagram of the side plate of the present application. Figure 3 The figure is a sectional view of the reaction cylinder of the present application. Figure 4 The figure is a sectional view of the return pipe of the present application. Figure 5 The figure is a sectional view of the protection cylinder of the present application. Figure 6 The figure is an installation schematic diagram of the vertical cylinder of the present application. Figure 7 The figure is a sectional view of the pressure equalizing chamber of the present application. Figure 8 The figure is an installation schematic diagram of the baffle of the present application.

[0017] In the figure: 1, liquid inlet pipe; 2, pressure equalizing chamber; 3, connecting pipe; 4, shunt pipe; 5, precision nozzle; 6, side plate; 7, reaction cylinder; 8, protection mechanism; 801, protection cylinder; 802, through hole; 803, circular groove; 804, chute; 805, vertical cylinder; 806, mounting sleeve; 807, first sealing ring; 808, plug; 809, plug groove; 810, displacement frame; 811, mounting groove; 812, second sealing ring; 9, displacement mechanism; 901, first butt plate; 902, limiting hole; 903, threaded hole; 904, second butt plate; 905, limiting rod; 906, first threaded rod; 907, rotating column; 908, first bevel gear; 909, second bevel gear; 910, second threaded rod; 911, baffle; 10, liquid outlet pipe; 11, return pipe; 12, third sealing ring. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of protection of the present application.

[0019] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes and cannot be understood as indicating or implying relative importance. In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "setting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances. The embodiments of the present application will be described below according to the overall structure of the present application.

[0020] Please refer to Figures 1 to 8 In the embodiments of the present application, a method for reducing biochemical sludge is provided, and the specific steps are as follows: Step 1: Equipment installation, install the hydrodynamic cavitation equipment on the return line of the sludge pool and the biological pool; Step two: injection, sewage into the pressure chamber 2, through the connecting pipe 3 into two shunt pipe 4, respectively, and then through the symmetrical precision nozzle 5 high speed rotation (high pressure) into the cavitation chamber; Step three: cavitation, fluid in the precision nozzle 5 generates negative pressure, cavitation bubble is formed rapidly, when rotating collision, cavitation bubble is broken rapidly, cavitation phenomenon is generated near the outlet of the cavitation chamber, strong energy is generated, and the substances in the fluid can be destroyed, which can disperse the large cluster of microorganisms in the sludge, destroy the zooglea and break the cell wall of the microorganism, and destroy the extracellular polymer attached to the cell wall; Step four: degradation, the activated sludge after hydraulic cavitation treatment returns to the biological tank, which is easier to be degraded, and provides carbon source for the activated microorganism, which not only facilitates subsequent sludge reduction, but also greatly reduces the carbon source input.

[0021] A device for biochemical sludge reduction, the hydraulic cavitation equipment comprises a liquid inlet pipe 1 and a backflow pipe 11, the top end of the liquid inlet pipe 1 is fixedly connected with a pressure equalizing chamber 2, the two sides of the pressure equalizing chamber 2 are fixedly connected with connecting pipes 3, one end of the connecting pipe 3 is provided with a shunt pipe 4, the outer wall of the shunt pipe 4 is fixedly connected with side plates 6, the two side plates 6 are provided with a reaction cylinder 7, the cavitation chamber is composed of the two side plates 6 and the reaction cylinder 7, one end of the shunt pipe 4 is provided with a precision nozzle 5 in the inner cavity of the reaction cylinder 7, the top end of the reaction cylinder 7 is fixedly connected with a liquid outlet pipe 10, the backflow pipe 11 is installed at the top end of the liquid outlet pipe 10, the inner cavity of the reaction cylinder 7 is protected by a protection mechanism 8, and the shunt pipe 4 is displaced by a displacement mechanism 9.

[0022] In the embodiment, the sewage enters the pressure equalizing chamber 2 through the liquid inlet pipe 1, the sewage in the pressure equalizing chamber 2 enters the shunt pipe 4 through the connecting pipe 3, and then enters the cavitation chamber through the precision nozzle 5, the fluid generates negative pressure in the precision nozzle 5, the cavitation bubble is formed rapidly, when rotating collision, the cavitation bubble is broken rapidly, cavitation phenomenon is generated near the outlet of the cavitation chamber, when the cavitation bubble is broken, due to the inertia and compressibility of the substances in the bubble, a huge implosion force is generated, local hot spots are caused, a huge energy is released, and the substances in the fluid can be destroyed, which can disperse the large cluster of microorganisms in the sludge, destroy the zooglea and break the cell wall of the microorganism, and destroy the extracellular polymer attached to the cell wall, and finally the sewage after cavitation flows into the backflow pipe 11 through the liquid outlet pipe 10.

[0023] Please refer to Figures 2 to 6The protection mechanism 8 comprises a protection cylinder 801 which is slidingly connected to the inner wall of the reaction cylinder 7, the outer wall of the protection cylinder 801 is provided with a circular groove 803, the bottom end of the circular groove 803 is provided with a through hole 802, the two sides of the reaction cylinder 7 are symmetrically provided with mounting grooves 811, the inner wall of the mounting grooves 811 is mounted with second sealing rings 812, the inner part of the liquid discharge pipe 10 is provided with a sliding groove 804, the inner wall of the sliding groove 804 is slidingly connected with a vertical cylinder 805, the outer wall of the reflux pipe 11 is rotatably connected with a mounting sleeve 806, the bottom end of the reflux pipe 11 is symmetrically fixedly connected with plug blocks 808, the bottom end of the reflux pipe 11 is located outside the plug blocks 808 and is mounted with first sealing rings 807, the top end of the liquid discharge pipe 10 is provided with an insertion groove 809, the inner wall of the insertion groove 809 is slidingly connected with a displacement frame 810, and the displacement frame 810 extends to the inner cavity of the sliding groove 804.

[0024] In the embodiment, the fluid generates cavitation phenomenon near the outlet of the cavitation chamber, at this time, the protection cylinder 801 and the vertical cylinder 805 protect the inner cavity of the reaction cylinder 7, when the protection cylinder 801 is disassembled, the shunt pipe 4 is moved by the cooperation of the parts in the displacement mechanism 9, the shunt pipe 4 is displaced to drive the side plate 6 to displace out of the mounting groove 811; after completion, the mounting sleeve 806 is rotated, the mounting sleeve 806 is rotated to drive the relative displacement between the reflux pipe 11 and the liquid discharge pipe 10, the plug blocks 808 are displaced out of the insertion groove 809, until the mounting sleeve 806 is separated from the liquid discharge pipe 10, the disassembly of the reaction cylinder 7 is completed, then the reaction cylinder 7 is rotated to make the direction of the liquid discharge pipe 10 downward, the vertical cylinder 805 is slidingly connected along the sliding groove 804 under the action of gravity, the vertical cylinder 805 is slidingly connected out of the circular groove 803, the positioning of the protection cylinder 801 is cancelled, and the protection cylinder 801 is taken out from the reaction cylinder 7; When installing the protection cylinder 801, the direction of the liquid discharge pipe 10 is downward, the protection cylinder 801 is inserted into the reaction cylinder 7, so that the through hole 802 is aligned with the liquid discharge pipe 10, the liquid discharge pipe 10 is turned upward, the vertical cylinder 805 is gravity sliding into the circular groove 803, the protection cylinder 801 is positioned in the reaction cylinder 7, then the mounting sleeve 806 is threaded connected on the outer wall of the liquid discharge pipe 10, the liquid discharge pipe 10 and the return pipe 11 are fixedly connected, the first sealing ring 807 is used to improve the sealing between the liquid discharge pipe 10 and the return pipe 11, in this process, the plug 808 is inserted into the slot 809, the plug 808 is in contact with the displacement frame 810, the displacement frame 810 is displaced, the displacement frame 810 is in contact with the vertical cylinder 805, the vertical cylinder 805 is pressed in the circular groove 803, so as to fix the protection cylinder 801, then the two shunt pipes 4 are displaced to each other, the shunt pipe 4 drives the side plate 6 to displace, the side plate 6 is displaced into the mounting groove 811, the second sealing ring 812 is used to improve the sealing between the side plate 6 and the reaction cylinder 7, the side plate 6 and the reaction cylinder 7 are combined to form a cavitation chamber, which is convenient for protecting the inner cavity of the reaction cylinder 7 by setting the protection cylinder 801, and the protection cylinder 801 can be quickly replaced.

[0025] Please refer to Figures 7 to 8 The displacement mechanism 9 comprises a first docking plate 901, the first docking plate 901 is fixedly connected to one end of the shunt pipe 4 facing the connecting pipe 3, the other end of the connecting pipe 3 facing the shunt pipe 4 is fixedly connected with a second docking plate 904, the outer wall of the first docking plate 901 is provided with a limiting hole 902 and a threaded hole 903, the outer wall of the second docking plate 904 is fixedly connected with a limiting rod 905, the outer wall of the second docking plate 904 is rotatably connected with a rotating column 907 above the connecting pipe 3, one end of the rotating column 907 is fixedly connected with a first threaded rod 906, the other end of the rotating column 907 is fixedly connected with a first bevel gear 908, the first bevel gear 908 is located in the inner cavity of the pressure equalizing chamber 2, the inner part of the pressure equalizing chamber 2 is rotatably connected with a second bevel gear 909 outside the first bevel gear 908, the bottom end of the second bevel gear 909 is fixedly connected with a second threaded rod 910, the outer wall of the second threaded rod 910 is slidably connected with a baffle 911, the baffle 911 is slidably connected in the inner part of the pressure equalizing chamber 2.

[0026] In the embodiment, when the shunt pipe 4 is displaced, the rotating column 907 is rotated, the rotating column 907 rotates to drive the first threaded rod 906 to rotate, the first threaded rod 906 rotates to drive the first abutment plate 901 to displace through the threaded hole 903, the limiting rod 905 slides in the limiting hole 902 to limit the direction of the first abutment plate 901, the first abutment plate 901 is displaced to drive the shunt pipe 4 to displace; at the same time, the rotating column 907 is rotated to drive the first bevel gear 908 to rotate synchronously, the first bevel gear 908 is rotated to drive the second bevel gear 909 to rotate, the second bevel gear 909 is rotated to drive the second threaded rod 910 to rotate, the second threaded rod 910 is rotated to drive the baffle 911 to displace; thus, when the shunt pipe 4 and the connecting pipe 3 are separated, the connecting pipe 3 is automatically closed to prevent sewage from flowing out through the connecting pipe 3 to cause pollution; when the rotating column 907 is rotated to drive the shunt pipe 4 to move towards the connecting pipe 3, the first abutment plate 901 and the second abutment plate 904 are tightly attached, and the third sealing ring 12 is used to improve the sealing performance of the connection between the connecting pipe 3 and the shunt pipe 4.

[0027] Please refer to Figures 2 to 6 , the outer wall of the side plate 6 is attached to the inner wall of the mounting groove 811.

[0028] In the embodiment, the shunt pipe 4 is displaced to drive the side plate 6 to displace, the side plate 6 is displaced into the mounting groove 811, and the second sealing ring 812 is used to improve the sealing performance between the side plate 6 and the reaction cylinder 7.

[0029] Please refer to Figures 2 to 6 , the inner wall of the mounting sleeve 806 is provided with an internal thread, the outer wall of the drainage pipe 10 is provided with an external thread, the external thread is matched with the internal thread, and the outer wall of the plug 808 is attached to the inner wall of the plug groove 809.

[0030] In the embodiment, the mounting sleeve 806 is threadedly connected to the outer wall of the drainage pipe 10, the plug 808 is inserted into the plug groove 809, the drainage pipe 10 and the reflux pipe 11 are fixedly connected, and the first sealing ring 807 is used to improve the sealing performance between the drainage pipe 10 and the reflux pipe 11.

[0031] Please refer to Figures 2 to 6 , the outer wall of the protection cylinder 801 is attached to the inner wall of the reaction cylinder 7, the outer wall of the vertical cylinder 805 is attached to the inner wall of the sliding groove 804, and the bottom outer wall of the vertical cylinder 805 is attached to the inner wall of the circular groove 803.

[0032] In the embodiment, the protection cylinder 801 is inserted into the reaction cylinder 7, the insertion block 808 is inserted into the insertion slot 809, the insertion block 808 is in contact with the displacement frame 810, the displacement frame 810 is displaced, the displacement frame 810 is in contact with the vertical cylinder 805, the vertical cylinder 805 is pressed in the circular groove 803, and the protection cylinder 801 is fixed.

[0033] Please refer to Figures 7 to 8 The inner wall of the limiting hole 902 is attached to the outer wall of the limiting rod 905, and the threaded hole 903 is matched with the first threaded rod 906.

[0034] In the embodiment, the rotating column 907 is rotated, the rotating column 907 drives the first threaded rod 906 to rotate, the first threaded rod 906 rotates and drives the first butt joint plate 901 to displace through the threaded hole 903, the limiting rod 905 slides in the limiting hole 902 at this time, the direction of the first butt joint plate 901 is limited, and the first butt joint plate 901 drives the shunt pipe 4 to displace.

[0035] Please refer to Figures 7 to 8 The first bevel gear 908 is engaged with the second bevel gear 909, and the inner wall of the baffle 911 is provided with threads matched with the second threaded rod 910.

[0036] In the embodiment, the rotating column 907 is rotated to drive the first bevel gear 908 to rotate synchronously, the first bevel gear 908 drives the second bevel gear 909 to rotate, the second bevel gear 909 drives the second threaded rod 910 to rotate, and the second threaded rod 910 drives the baffle 911 to displace.

[0037] Please refer to Figures 7 to 8 The first butt joint plate 901 and the second butt joint plate 904 are installed with the third sealing ring 12 at one end close to each other.

[0038] In the embodiment, the rotating column 907 drives the shunt pipe 4 to move towards the connecting pipe 3, the first butt joint plate 901 and the second butt joint plate 904 are close to each other, and the third sealing ring 12 is used to improve the sealing performance of the connection between the connecting pipe 3 and the shunt pipe 4.

[0039] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can make equivalent replacement or change according to the technical scheme and the inventive concept of the present application within the technical range disclosed by the present application, which should be covered in the protection scope of the present application.

Claims

1. A method for biochemical sludge reduction, characterized by, The specific steps are as follows: Step one: equipment installation, install the hydrodynamic cavitation equipment on the backflow pipeline of the sludge pool and the biological pool; Step two: injection, sewage enters the pressure equalizing chamber (2), flows into two branch pipes (4) through the connecting pipes (3), and then enters the cavitation chamber at high speed through the symmetrical precision nozzles (5); Step three: cavitation, negative pressure is generated in the precision nozzle (5), and cavitation bubbles are quickly formed. When the bubbles collide, they quickly break, cavitation occurs near the outlet of the cavitation chamber, strong energy is generated, and the large clusters of microorganisms in the sludge are broken, the zooglea is destroyed, and the cell wall of the microorganism is broken, and the extracellular polymer attached to the cell wall is also destroyed; Step four: degradation, the activated sludge treated by hydrodynamic cavitation is returned to the biological pool and is more easily degraded.

2. The apparatus for use in a process for biochemical sludge reduction according to claim 1, characterized in that The hydrodynamic cavitation equipment comprises a liquid inlet pipe (1) and a backflow pipe (11), the top end of the liquid inlet pipe (1) is fixedly connected with a pressure equalizing chamber (2), the two sides of the pressure equalizing chamber (2) are fixedly connected with connecting pipes (3), one end of the connecting pipe (3) is provided with a branch pipe (4), the outer wall of the branch pipe (4) is fixedly connected with side plates (6), the two side plates (6) are provided with a reaction cylinder (7) between them, the cavitation chamber is composed of the two side plates (6) and the reaction cylinder (7), one end of the branch pipe (4) is provided with a precision nozzle (5) in the inner cavity of the reaction cylinder (7), the top end of the reaction cylinder (7) is fixedly connected with a liquid outlet pipe (10), the backflow pipe (11) is installed at the top end of the liquid outlet pipe (10), the inner cavity of the reaction cylinder (7) is protected by a protection mechanism (8), and the branch pipe (4) is displaced by a displacement mechanism (9).

3. A device for use in a method for biochemical sludge reduction according to claim 2, characterized in that The protection mechanism (8) comprises a protection cylinder (801) which is slidably connected to the inner wall of the reaction cylinder (7), a circular groove (803) is formed in the outer wall of the protection cylinder (801), a through hole (802) is formed in the bottom end of the circular groove (803), installation grooves (811) are symmetrically formed in the two sides of the reaction cylinder (7), a second sealing ring (812) is installed on the inner wall of the installation groove (811), a sliding groove (804) is formed in the inner part of the liquid outlet pipe (10), a vertical cylinder (805) is slidably connected to the inner wall of the sliding groove (804), an installation sleeve (806) is rotatably connected to the outer wall of the backflow pipe (11), plug blocks (808) are symmetrically fixedly connected to the bottom end of the backflow pipe (11), a first sealing ring (807) is installed on the outer side of the bottom end of the backflow pipe (11), a plug slot (809) is formed in the top end of the liquid outlet pipe (10), a displacement frame (810) is slidably connected to the inner wall of the plug slot (809), and the displacement frame (810) extends into the inner cavity of the sliding groove (804).

4. The apparatus for use in a process for biochemical sludge reduction according to claim 3, characterized in that The displacement mechanism (9) comprises a first butt joint plate (901) fixedly connected to one end of the shunt pipe (4) towards the connecting pipe (3), one end of the connecting pipe (3) towards the shunt pipe (4) is fixedly connected with a second butt joint plate (904), the outer wall of the first butt joint plate (901) is provided with a limiting hole (902) and a threaded hole (903), the outer wall of the second butt joint plate (904) is fixedly connected with a limiting rod (905), the outer wall of the second butt joint plate (904) is rotatably connected with a rotating column (907) above the connecting pipe (3), one end of the rotating column (907) is fixedly connected with a first threaded rod (906), the other end of the rotating column (907) is fixedly connected with a first bevel gear (908), the first bevel gear (908) is located in the inner cavity of the pressure equalizing chamber (2), the inner part of the pressure equalizing chamber (2) is rotatably connected with a second bevel gear (909) outside the first bevel gear (908), the bottom end of the second bevel gear (909) is fixedly connected with a second threaded rod (910), the outer wall of the second threaded rod (910) is slidably connected with a baffle (911), the baffle (911) is slidably connected in the inner part of the pressure equalizing chamber (2).

5. The apparatus for use in the method for biochemical sludge reduction according to claim 3, characterized in that, The outer wall of the side plate (6) is attached to the inner wall of the mounting groove (811).

6. The apparatus for use in the method for biochemical sludge reduction according to claim 3, characterized in that, The inner wall of the mounting sleeve (806) is provided with internal threads, the outer wall of the liquid discharge pipe (10) is provided with external threads, the external threads are matched with the internal threads, the outer wall of the plug (808) is attached to the inner wall of the plug groove (809).

7. The apparatus for use in the method for biochemical sludge reduction according to claim 3, characterized in that, The outer wall of the protection cylinder (801) is attached to the inner wall of the reaction cylinder (7), the outer wall of the vertical cylinder (805) is attached to the inner wall of the sliding groove (804), and the bottom outer wall of the vertical cylinder (805) is attached to the inner wall of the circular groove (803).

8. The apparatus for use in the method for biochemical sludge reduction according to claim 4, characterized in that, The inner wall of the limiting hole (902) is attached to the outer wall of the limiting rod (905), and the threaded hole (903) is matched with the first threaded rod (906).

9. The apparatus for biochemical sludge reduction according to claim 4, wherein The first bevel gear (908) is engaged with the second bevel gear (909), and the inner wall of the baffle (911) is provided with threads matched with the second threaded rod (910).

10. The apparatus for use in the method of biochemical sludge reduction according to claim 4, characterized in that, The first butt joint plate (901) and the second butt joint plate (904) are provided with a third sealing ring (12) at one end close to each other.

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