A sludge hydraulic cavitation device

Abstract

The invention relates to the technical field of sludge treatment, and specifically to a sludge hydraulic cavitation device, comprising: a volute cover, wherein the bottom of the volute cover is installed on the ground by bolts, a first cavitation chamber is fixedly connected to the axial center of the left side of the volute cover, and a second cavitation chamber is fixedly connected to the axial center of the right side of the volute cover; in the sludge hydraulic cavitation device, when the sludge enters the interior of a second water inlet groove, it can enter the interior of a second water outlet groove through an annular slit groove, and the second water outlet groove can transport the sludge to the interior of a water outlet, so that the hydraulic cavitation device can increase the sludge conveying capacity while cavitating the sludge, and can also perform cavitation treatment during the transportation of the sludge through the special structure of the conveying cavity, and when the sludge is discharged, it can perform cavitation treatment through the cooperation of the annular slit groove, a blind hole and the second water outlet groove, so that the hydraulic cavitation device can increase the sludge conveying capacity while improving the sludge cavitation effect.

Description

Technical Field

[0001] The invention relates to the technical field of sludge treatment, in particular to a sludge hydrodynamic cavitation device. Background Art

[0002] Sludge is composed of solid matter in the original wastewater and solid matter generated during the wastewater treatment process. Sludge treatment is the process of reducing, stabilizing and harmlessly treating sludge. The higher the degree of sewage treatment, the more sludge residue will be produced and need to be treated. Unless land treatment or sewage ponds are used to treat sewage, general sewage treatment plants must have sludge treatment facilities. For modern sewage treatment plants, sludge treatment and disposal has become the most complex and expensive part of the operation of sewage treatment systems. Cavitation degradation technology, as a new type of organic sewage treatment method, is more thorough and efficient in degrading organic matter than traditional organic sewage treatment methods. It has the advantages of cleanliness, environmental protection, energy saving, high efficiency and low cost. It has a good application prospect in the treatment of difficult-to-degrade agricultural organic sewage. Therefore, a sludge hydraulic cavitation device is needed;

[0003] The Chinese invention patent with publication number CN111453957A discloses a residual sludge hydraulic cavitation pump device based on the cavitation principle. The sludge enters between the fixed disk and the outer end cover through the feed port. The rotation of the first cavitation column can cavitate the sludge. After the cavitation treatment, the sludge can be discharged through the discharge port. The sludge of this invention flows by gravity or a pressure pump, which will reduce the flow speed of the sludge and reduce the cavitation efficiency of the sludge. The additional addition of a pressure pump will also increase the cost of sludge cavitation treatment. Summary of the invention

[0004] To solve the above-mentioned purpose, the present invention provides the following technical solution: a sludge hydraulic cavitation device, comprising: a volute cover, the bottom of which is installed on the ground by bolts, a first cavitation chamber is fixedly connected to the axial center of the left side of the volute cover, and a second cavitation chamber is fixedly connected to the axial center of the right side of the volute cover;

[0005] A water inlet is fixedly connected to the axial center of the end of the first cavitation chamber, a water outlet is fixedly connected to the annular arc surface of the volute cover, a rotating shaft is connected through the volute cover and the second cavitation chamber, an impeller is installed on the surface of the rotating shaft close to the volute cover, a bearing is rotatably connected between the second cavitation chamber and the rotating shaft, a drive motor is installed at one end of the rotating shaft away from the second cavitation chamber, and the drive motor is installed on the ground by bolts;

[0006] A first fixed cavitation column is fixedly connected to the end of the inner side wall of the first cavitation cavity, a second fixed cavitation column is fixedly connected to the end of the inner side wall of the second cavitation cavity, a first rotating cavitation column is fixedly connected to the left side of the impeller close to the first cavitation cavity, and a second rotating cavitation column is fixedly connected to the right side of the impeller close to the second cavitation cavity;

[0007] The impeller is provided with a conveying chamber, comprising: a first water inlet groove, which is arranged on the left side of the impeller away from the rotating shaft, a first water outlet groove is arranged on the right side of the impeller close to the rotating shaft, and an arc-shaped water conveying groove is arranged between the first water inlet groove and the first water outlet groove.

[0008] As a preferred solution of the present invention, the first fixed cavitation column and the second fixed cavitation column are respectively distributed in the first cavitation cavity and the second cavitation cavity in the form of an annular array, and the first rotating cavitation column and the second rotating cavitation column are respectively distributed on the left and right sides of the impeller in the form of an annular array.

[0009] As a preferred solution of the present invention, the first fixed cavitation columns and the first rotating cavitation columns are alternately distributed inside the first cavitation cavity, and the second fixed cavitation columns and the second rotating cavitation columns are alternately distributed inside the second cavitation cavity.

[0010] As a preferred solution of the present invention, six groups of the first water inlet trough, the first water outlet trough and the arc-shaped water delivery trough are arranged, and the six groups of the first water inlet trough, the first water outlet trough and the arc-shaped water delivery trough are distributed inside the impeller in a circular array.

[0011] As a preferred solution of the present invention, the first water inlet trough and the first water outlet trough are both arc-shaped, and the size of the first water inlet trough is smaller than that of the first water outlet trough.

[0012] As a preferred solution of the present invention, a second water inlet groove is provided on the right side of the impeller away from the rotating shaft, a second water outlet groove is provided on the arc surface of the impeller, an annular slit groove is provided between the second water inlet groove and the second water outlet groove, a blind hole is provided on the inner side of the annular slit groove, and a sealing ring is rotatably connected between the volute cover and the impeller.

[0013] As a preferred solution of the present invention, the second water inlet groove is annular, the bottom of the second water inlet groove is arc-shaped, six groups of the second water outlet grooves and blind holes are arranged, and the six groups of the second water outlet grooves and blind holes are distributed in a circular array on the arc surface of the impeller.

[0014] Compared with the prior art, the beneficial effects of the present invention are: the sludge hydrodynamic cavitation device,

[0015] 1. A rotating shaft is provided which can be rotated by a driving motor. When the rotating shaft rotates, the impeller can be driven to rotate. When the impeller rotates, the first rotating cavitation column, the conveying chamber and the second rotating cavitation column can be driven to rotate respectively. When the first rotating cavitation column rotates, the sludge can be pushed outward by the rotating centrifugal force. At the same time, the conveying chamber can grab the sludge in a spiral shape and convey it to the inside of the second cavitation chamber. At this time, the second rotating cavitation column can push the sludge outward by the rotating centrifugal force. When the impeller rotates, a strong conveying capacity can be generated through the second water outlet trough. The conveying capacity generated by the second water outlet trough can suck the sludge into the inside of the second water inlet trough. When the sludge enters the inside of the second water inlet trough, it can enter the inside of the second water outlet trough through the annular slit groove. The second water outlet trough can convey the sludge to the inside of the water outlet, which is convenient for the hydraulic cavitation device to increase the sludge conveying capacity while cavitating the sludge.

[0016] 2. The first cavitation chamber and the second cavitation chamber are provided to increase the cavitation effect of the sludge by the rotation of the first rotating cavitation column and the second rotating cavitation column. The special structure of the conveying chamber can also be used to perform cavitation treatment during the sludge transportation. When the sludge is discharged, it can be cavitated through the cooperation of the annular slit groove, the blind hole and the second water outlet groove, which is convenient for the hydraulic cavitation device to increase the sludge conveying capacity while improving the sludge cavitation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a front structural schematic diagram of the present invention;

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention;

[0019] Figure 3 It is a schematic diagram of the three-dimensional cross-sectional structure of the present invention;

[0020] Figure 4 It is a schematic diagram of the front cross-sectional structure of the present invention;

[0021] Figure 5 It is a schematic diagram of the fluid flow structure of the present invention;

[0022] Figure 6 It is a schematic diagram of the right view of the structure of the first cavitation cavity of the present invention;

[0023] Figure 7 It is a left-side structural schematic diagram of the second cavitation cavity of the present invention;

[0024] Figure 8 It is a left-side structural schematic diagram of the impeller of the present invention;

[0025] Fig. 9 It is a right view structural schematic diagram of the impeller of the present invention;

[0026] Fig.10It is a schematic diagram of the internal structure of the impeller of the present invention.

[0027] In the figure: 1, volute cover; 2, first cavitation chamber; 3, water inlet; 4, first fixed cavitation column; 5, second cavitation chamber; 6, second fixed cavitation column; 7, water outlet; 8, bearing; 9, rotating shaft; 10, impeller; 11, first rotating cavitation column; 12, conveying chamber; 121, first water inlet groove; 122, arc-shaped water conveying groove; 123, first water outlet groove; 13, second rotating cavitation column; 14, second water inlet groove; 15, second water outlet groove; 16, annular slit groove; 17, blind hole; 18, sealing ring; 19, driving motor. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] See also Figure 1-Figure 3 and Figure 5 The present invention provides an embodiment: a sludge hydraulic cavitation device, comprising: a volute cover 1, the bottom of the volute cover 1 is installed on the ground by bolts, a first cavitation chamber 2 is fixedly connected to the axial center of the left side of the volute cover 1, a second cavitation chamber 5 is fixedly connected to the axial center of the right side of the volute cover 1, a water inlet 3 is fixedly connected to the axial center of the end of the first cavitation chamber 2, a water outlet 7 is fixedly connected to the annular arc surface of the volute cover 1, a rotating shaft 9 is penetrated and connected between the volute cover 1 and the second cavitation chamber 5, an impeller 10 is installed on the surface of the rotating shaft 9 close to the volute cover 1, a bearing 8 is rotatably connected between the second cavitation chamber 5 and the rotating shaft 9, a driving motor 19 is installed at one end of the rotating shaft 9 away from the second cavitation chamber 5, and the driving motor 19 is installed on the ground by bolts.

[0030] It should be noted that the driving motor 19 can drive the rotating shaft 9 to rotate. When the rotating shaft 9 rotates, it can rotate with the second cavitation chamber 5 through the bearing 8. When the rotating shaft 9 rotates, it can drive the impeller 10 to rotate. At the same time, the sludge can enter the first cavitation chamber 2 through the water inlet 3 for cavitation treatment. After the cavitation treatment, the sludge can be transported to the second cavitation chamber 5 through the impeller 10. When the sludge enters the second cavitation chamber 5, it can be cavitated again. After the cavitation treatment, the sludge can be transported to the inside of the water outlet 7 through the impeller 10, and the water outlet 7 can discharge the sludge after cavitation treatment.

[0031] like Figure 2 , Figure 4 and Figure 6-Figure 9As shown, a first fixed cavitation column 4 is fixedly connected to the end of the inner wall of the first cavitation cavity 2, a second fixed cavitation column 6 is fixedly connected to the end of the inner wall of the second cavitation cavity 5, a first rotating cavitation column 11 is fixedly connected to the left side of the impeller 10 near the first cavitation cavity 2, and a second rotating cavitation column 13 is fixedly connected to the right side of the impeller 10 near the second cavitation cavity 5. The first fixed cavitation column 4 and the second fixed cavitation column 6 are respectively distributed in the first cavitation cavity 2 and the second cavitation cavity 5 in an annular array, the first rotating cavitation column 11 and the second rotating cavitation column 13 are respectively distributed in the left and right sides of the impeller 10 in an annular array, the first fixed cavitation column 4 and the first rotating cavitation column 11 are staggered in the first cavitation cavity 2, and the second fixed cavitation column 6 and the second rotating cavitation column 13 are staggered in the second cavitation cavity 5.

[0032] It can be understood that the sludge can enter the interior of the first cavitation chamber 2 through the water inlet 3. At this time, the impeller 10 can drive the first rotating cavitation column 11 to rotate when it rotates. When the first rotating cavitation column 11 rotates, it can use its own rhombus to cause the fluid to produce cavitation bubbles. When the cavitation bubbles collapse, shear force, high temperature and high pressure will be generated to break the surrounding bacterial cells. When the first rotating cavitation column 11 passes between the first fixed cavitation columns 4 while rotating, the mutual rhombus inclined surfaces will produce a certain squeezing force on the sludge, thereby forming a certain outward push on the sludge. After the cavitation of the sludge in the first cavitation chamber 2 is completed, the sludge can enter the interior of the second cavitation chamber 5 through the impeller 10, and the rotation of the impeller 10 will also drive the second rotating cavitation column 13 to rotate. When the second rotating cavitation column 13 rotates, it will perform cavitation treatment on the sludge again. After the cavitation treatment of the sludge, the second rotating cavitation column 13 and the first fixed cavitation column 4 can cooperate to push the sludge into the interior of the impeller 10 again.

[0033] like Figure 3 , Figure 8-Figure 10 As shown, a conveying chamber 12 is installed on the impeller 10, including: a first water inlet groove 121, the first water inlet groove 121 is opened on the left side of the impeller 10 away from the rotating shaft 9, and a first water outlet groove 123 is opened on the right side of the impeller 10 close to the rotating shaft 9. An arc-shaped water delivery groove 122 is opened between the first water inlet groove 121 and the first water outlet groove 123. Six groups of the first water inlet groove 121, the first water outlet groove 123 and the arc-shaped water delivery groove 122 are arranged. The six groups of the first water inlet groove 121, the first water outlet groove 123 and the arc-shaped water delivery groove 122 are distributed in the interior of the impeller 10 in a circular array. The first water inlet groove 121 and the first water outlet groove 123 are both arc-shaped, and the size of the first water inlet groove 121 is smaller than the size of the first water outlet groove 123.

[0034] It is worth noting that the impeller 10 can drive the first water inlet trough 121 to rotate when it rotates. When the first water inlet trough 121 rotates, the sludge that has undergone primary cavitation treatment can be scraped into the interior of the arc-shaped water delivery trough 122 through an annular distribution. The arc-shaped water delivery trough 122 can increase the pressure during sludge transportation through its own funnel shape. When the sludge is transported to the end of the arc-shaped water delivery trough 122, it can be transported to the interior of the first water outlet trough 123. The first water outlet trough 123 can transport the sludge to the interior of the second cavitation cavity 5. When the sludge enters the interior of the second cavitation cavity 5, cavitations will be generated. After the cavitations burst, the bacterial cells can be ruptured, and the release of cell-bound water is completed in this process.

[0035] like Figure 2 , Figure 3 and Fig.10 As shown, a second water inlet groove 14 is provided on the right side of the impeller 10 away from the rotating shaft 9, a second water outlet groove 15 is provided on the arc surface of the impeller 10, an annular slit groove 16 is provided between the second water inlet groove 14 and the second water outlet groove 15, a blind hole 17 is provided on the inner side of the annular slit groove 16, a sealing ring 18 is rotatably connected between the volute cover 1 and the impeller 10, the second water inlet groove 14 is annular, the bottom of the second water inlet groove 14 is arc-shaped, six groups of second water outlet grooves 15 and blind holes 17 are arranged, and the six groups of second water outlet grooves 15 and blind holes 17 are distributed on the arc surface of the impeller 10 in a circular array.

[0036] It should be understood that the impeller 10 can drive the second water outlet trough 15 to rotate when it rotates. When the second water outlet trough 15 rotates, it will generate a strong conveying capacity for the sludge. The conveying capacity generated by the second water outlet trough 15 can suck the sludge into the second water inlet trough 14. When the sludge enters the second water inlet trough 14, it will enter the annular slit groove 16. When the high-speed fluid passes through the annular slit groove 16, flow separation occurs at the leading edge of the annular slit groove 16 and the trailing edge of the blind hole 17, generating separation cavitation, i.e., cavitation at the leading edge of the annular slit groove 16 and cavitation at the trailing edge of the blind hole 17. The fluid entering the blind hole 17 rotates under the constraint of the wall surface, forming a relatively stable vortex in the blind hole 17, inducing a relatively stable vortex of vortex cavitation, i.e., cavitation in the hole. The fluid passing through the annular slit groove 16 has a high velocity, and a strong shearing effect occurs with the low-speed fluid in the second water outlet trough 15, forming shear cavitation, i.e., cavitation at the trailing edge of the annular slit groove 16.

[0037] Working principle: Figure 1-Figure 10As shown, when the sludge hydrodynamic cavitation device is used, the driving motor 19 can drive the rotating shaft 9 to rotate. When the rotating shaft 9 rotates, it can rotate with the second cavitation chamber 5 through the bearing 8. When the rotating shaft 9 rotates, it can drive the impeller 10 and the first rotating cavitation column 11 and the second rotating cavitation column 13 to rotate. At the same time, when the sludge can enter the interior of the first cavitation chamber 2 through the water inlet 3, it can be cavitated by the rotation of the first rotating cavitation column 11. After the sludge cavitation treatment, it can be transported to the interior of the second cavitation chamber 5 through the conveying chamber 12 inside the impeller 10. When the sludge enters the interior of the second cavitation chamber 5, it can be cavitated again by the rotation of the second rotating cavitation column 13. After the sludge cavitation treatment, it can be transported to the interior of the water outlet 7 through the annular slit groove 16, the blind hole 17 and the second water outlet groove 15 on the impeller 10. The water outlet 7 can discharge the sludge after cavitation treatment. The contents not described in detail in this description belong to the prior art known to professional and technical personnel in this field.

[0038] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A sludge hydrodynamic cavitation device, comprising: A volute cover (1), wherein the bottom of the volute cover (1) is mounted on the ground by means of bolts, a first cavitation chamber (2) is fixedly connected to the axial center of the left side of the volute cover (1), and a second cavitation chamber (5) is fixedly connected to the axial center of the right side of the volute cover (1). It is characterized by: A water inlet (3) is fixedly connected to the axial center of the end of the first cavitation chamber (2); a water outlet (7) is fixedly connected to the annular arc surface of the volute cover (1); a rotating shaft (9) is connected through the volute cover (1) and the second cavitation chamber (5); an impeller (10) is installed on the surface of the rotating shaft (9) close to the volute cover (1); a bearing (8) is rotatably connected between the second cavitation chamber (5) and the rotating shaft (9); a drive motor (19) is installed at one end of the rotating shaft (9) away from the second cavitation chamber (5); and the drive motor (19) is installed on the ground by bolts; A first fixed cavitation column (4) is fixedly connected to the end of the inner side wall of the first cavitation cavity (2), a second fixed cavitation column (6) is fixedly connected to the end of the inner side wall of the second cavitation cavity (5), a first rotating cavitation column (11) is fixedly connected to the left side of the impeller (10) close to the first cavitation cavity (2), and a second rotating cavitation column (13) is fixedly connected to the right side of the impeller (10) close to the second cavitation cavity (5); The impeller (10) is provided with a conveying chamber (12), comprising: a first water inlet groove (121), the first water inlet groove (121) being provided on the left side of the impeller (10) away from the rotating shaft (9), a first water outlet groove (123) being provided on the right side of the impeller (10) close to the rotating shaft (9), and an arc-shaped water conveying groove (122) being provided between the first water inlet groove (121) and the first water outlet groove (123); A second water inlet groove (14) is provided on the right side of the impeller (10) away from the rotating shaft (9); a second water outlet groove (15) is provided on the arc surface of the impeller (10); an annular slit groove (16) is provided between the second water inlet groove (14) and the second water outlet groove (15); a blind hole (17) is provided inside the annular slit groove (16); and a sealing ring (18) is rotatably connected between the volute cover (1) and the impeller (10); The second water inlet groove (14) is annular, the bottom of the second water inlet groove (14) is arc-shaped, six groups of the second water outlet grooves (15) and the blind holes (17) are provided, and the six groups of the second water outlet grooves (15) and the blind holes (17) are distributed on the arc-shaped surface of the impeller (10) in the form of an annular array.

2. A sludge hydrodynamic cavitation device according to claim 1, characterized in that: The first fixed cavitation columns (4) and the second fixed cavitation columns (6) are respectively distributed in the first cavitation cavity (2) and the second cavitation cavity (5) in the form of an annular array, and the first rotating cavitation columns (11) and the second rotating cavitation columns (13) are respectively distributed in the form of an annular array on the left and right sides of the impeller (10).

3. A sludge hydrodynamic cavitation device according to claim 1, characterized in that: The first fixed cavitation columns (4) and the first rotating cavitation columns (11) are distributed alternately inside the first cavitation cavity (2), and the second fixed cavitation columns (6) and the second rotating cavitation columns (13) are distributed alternately inside the second cavitation cavity (5).

4. A sludge hydrodynamic cavitation device according to claim 1, characterized in that: Six groups of the first water inlet groove (121), the first water outlet groove (123) and the arc-shaped water delivery groove (122) are provided, and the six groups of the first water inlet groove (121), the first water outlet groove (123) and the arc-shaped water delivery groove (122) are distributed inside the impeller (10) in a circular array.

5. A sludge hydrodynamic cavitation device according to claim 4, characterized in that: The first water inlet groove (121) and the first water outlet groove (123) are both arc-shaped, and the size of the first water inlet groove (121) is smaller than the size of the first water outlet groove (123).

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