Mechanical shearing device for active cells in urban domestic sludge

Abstract

The invention relates to the technical field of urban domestic sludge treatment, and discloses a mechanical shearing device for active cells in urban domestic sludge, the mechanical shearing device comprises a treatment box body, one side wall of the treatment box body is provided with a pressure generator in a penetrating manner, the other side wall of the treatment box body is communicated with a sludge output pipe, and the sludge output pipe is internally provided with a shearing mechanism; the shearing mechanism comprises a plurality of groups of hopper-shaped conveying pipes mounted in the sludge output pipe, the tail ends of the hopper-shaped conveying pipes are communicated with an extrusion channel, a plurality of groups of shearing plates are mounted in the extrusion channel, and the output end of the extrusion channel extends into the other group of hopper-shaped conveying pipes. After the structure is adopted, the device has the following advantages: the pressure generator generates alternating pressure of 0-16MPa in the treatment box body, high pressure is repeatedly applied and the pressure is instantaneously relieved through a special slit device in the conveying pipeline, and the sludge is subjected to multi-stage extrusion, cutting and friction through the shearing mechanism, so that biomass cells in part of sludge are broken; the separation of water in cells is promoted.

Description

Technical Field

[0001] The invention relates to the technical field of urban domestic sludge treatment, in particular to a mechanical shearing device for active cells in urban domestic sludge. Background Art

[0002] Municipal domestic sludge is a hydrophilic flocculent organic matter with a very loose colloidal network structure, many pore distributions and obvious pore sizes. The sludge surface is uneven and contains a small amount of branched structures and fibers of crystal growth. It has a porous flocculent structure and a strong water-holding capacity.

[0003] At present, the main method of dewatering urban domestic sludge in my country is mechanical dewatering. The widely used mechanical dewatering equipment includes belt filter press, plate and frame filter press, centrifugal filter press, etc. These dewatering equipment are limited by defects such as low filtration pressure and low filtration efficiency. It is difficult to reduce the moisture content of the dehydrated sludge to below 60%, which brings difficulties to subsequent treatment and disposal.

[0004] Therefore, it is urgent to further improve the dewatering efficiency of residual sludge and implement deep dehydration to further reduce the moisture content of the treated sludge in order to achieve large-scale reduction. Summary of the invention

[0005] 1. Technical Problems Solved

[0006] The present invention aims to solve the problem that the dehydration equipment is limited by the defects of low filtration pressure, low filtration efficiency and the like, and it is difficult to reduce the moisture content of the dehydrated sludge to below 60%, and deep dehydration cannot be performed.

[0007] 2. Technical Solution

[0008] In order to solve the above technical problems, the technical solution provided by the present invention is as follows: a mechanical shearing device for active cells in urban domestic sludge, comprising a treatment box, the upper side of which is connected to a sludge conveying pipe, a pressure generator is installed through one side wall of the treatment box, the other side wall of the treatment box is connected to a sludge output pipe, and a shearing mechanism is installed inside the sludge output pipe;

[0009] The shearing mechanism includes multiple groups of bucket-shaped conveying pipes installed inside the sludge output pipe, the tail end of the bucket-shaped conveying pipe is connected to an extrusion channel, multiple groups of shear plates are installed inside the extrusion channel, and the output end of the extrusion channel extends to the inside of another group of bucket-shaped conveying pipes.

[0010] As an improvement, a mounting ring is connected to one side of the extrusion channel close to the processing box, and the mounting ring is fixedly mounted on the inner side of the sludge output pipe by multiple groups of bolts.

[0011] As an improvement, a baffle is installed on the inner wall of the mounting ring, and a through hole is provided on the baffle for the extrusion channel to pass through.

[0012] As an improvement, a limiting ring is provided on the inner wall of the mounting ring, and the baffle is fixedly connected to the limiting ring with a plurality of sets of bolts, and no baffle is installed inside a set of limiting rings close to the processing box body.

[0013] As an improvement, the side of the bucket-shaped conveying pipe close to the processing box body is an annular structure, and the other side is a rectangular structure.

[0014] As an improvement, mounting grooves are provided inside the opposite side walls of the extrusion channel, the shear plate is inserted between two groups of corresponding mounting grooves and fixedly connected to the mounting grooves by multiple groups of bolts, and the opposite sides of the shear plate are respectively blade structures.

[0015] As an improvement, the pressure generator includes a hydraulic rod and a piston, the extended end of the hydraulic rod drives the piston to move inside the processing box, an electric sealing valve 1 is installed on the sludge conveying pipe, and an electric sealing valve 2 is provided at the other end of the sludge output pipe.

[0016] As an improvement, a controller connected to the pressure generator, the first electric sealing valve and the second electric sealing valve is installed on the outer wall of one side of the processing box.

[0017] As an improvement, a threaded connection sleeve is installed on the processing box body, a threaded connection pipe is installed on the outer side of the feed end of the sludge output pipe, and the threaded connection pipe is installed into the inside of the threaded connection sleeve in a threaded manner.

[0018] After adopting the above structure, the present invention has the following advantages: the pressure generator generates an alternating pressure of 0-16MPa in the processing box, and repeatedly applies high pressure and instantaneous pressure relief through a unique slit device in the conveying pipeline, and performs multi-stage extrusion, cutting and friction on the mud body through the shearing mechanism. The mud flocs are also squeezed and rubbed due to the viscosity, thereby further breaking the constraints of the cells in the sludge on the water molecules; the probability of opening the chemical bonds between the sludge flocs and the water molecules is increased, thereby achieving the breakage of some biomass cells in the sludge and promoting the separation of water in the cells. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 The present invention is a schematic diagram of the cross-sectional structure of a shearing mechanism of a mechanical shearing device for active cells in municipal sewage sludge.

[0020] Figure 2 The present invention is a schematic diagram of the feeding side structure of a shearing mechanism of a mechanical shearing device for active cells in municipal domestic sludge.

[0021] Figure 3 The present invention is a schematic diagram of the structure of the shearing mechanism of the discharge side of the mechanical shearing device for active cells in municipal domestic sludge.

[0022] Figure 4 The present invention is a schematic diagram of a baffle structure of a mechanical shearing device for active cells in municipal sewage sludge.

[0023] Figure 5 The present invention is a schematic diagram of the overall structure of a mechanical shearing device for active cells in municipal sewage sludge.

[0024] Figure 6 The present invention is a schematic diagram of a treatment box structure of a mechanical shearing device for active cells in municipal domestic sludge.

[0025] As shown in the figure: 1. Processing box; 2. Pressure generator; 3. Sludge conveying pipe; 4. Electric sealing valve 1; 5. Sludge output pipe; 6. Controller; 7. Threaded connection sleeve; 8. Threaded connection pipe; 9. Shearing mechanism; 901. Bucket-shaped conveying pipe; 902. Extrusion channel; 903. Mounting ring; 904. Bolt; 905. Mounting groove; 906. Shear plate; 907. Limiting ring; 908. Baffle; 909. Through hole; 10. Electric sealing valve 2. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0027] Example 1

[0028] As attached Figure 1 and attached Figure 5 As shown, a mechanical shearing device for active cells in urban domestic sludge comprises a processing box 1, the upper side of the processing box 1 is connected to a sludge conveying pipe 3, the pressure generator 2 comprises a hydraulic rod and a piston, the extended end of the hydraulic rod drives the piston to move inside the processing box 1, an electric sealing valve 1 4 is installed on the sludge conveying pipe 3, the other end of the sludge output pipe 5 is provided with an electric sealing valve 2 10, and a controller 6 connected to the pressure generator 2, the electric sealing valve 1 4 and the electric sealing valve 2 10 is installed on the outer wall of one side of the processing box 1.

[0029] Through the above structure, before the mechanical shearing device is used, the electric sealing valve 14 is opened and the electric sealing valve 2 10 is closed through the controller 6, and the sludge is transported to the inside of the processing box 1 through the sludge conveying pipe 3. The pressure generator 2 is started by the controller 6 to perform mechanical movement, and the piston moves inside the processing box 1 to generate an alternating pressure of 0-16MPa in the processing box. After the sludge is transported, the electric sealing valve 14 is closed through the controller 6 to make the processing box 1 and the inside of the sludge output pipe 5 sealed.

[0030] As attached Figure 1 , Attachment Figure 2 , Attachment Figure 3 and attached Figure 4 As shown, a pressure generator 2 is installed through one side wall of the processing box 1, and a sludge output pipe 5 is connected to the other side wall of the processing box 1, and a shearing mechanism 9 is installed inside the sludge output pipe 5;

[0031] The shearing mechanism 9 includes a plurality of bucket-shaped conveying pipes 901 installed inside the sludge output pipe 5, the tail end of the bucket-shaped conveying pipe 901 is connected with an extrusion channel 902, a plurality of shearing plates 906 are installed inside the extrusion channel 902, mounting grooves 905 are provided inside the opposite side walls of the extrusion channel 902, the shearing plates 906 are inserted between two corresponding mounting grooves 905 and are fixedly connected with the mounting grooves 905 by a plurality of bolts, the opposite sides of the shearing plates 906 are respectively blade structures, which are convenient for cutting the mud, the output end of the extrusion channel 902 extends to the inside of another group of bucket-shaped conveying pipes 901, the side of the bucket-shaped conveying pipe 901 close to the processing box 1 is an annular structure, and the other side is a rectangular structure;

[0032] A baffle 908 is installed on the inner wall of the mounting ring 903, and no baffle 908 is installed inside a set of limiting rings 907 close to the processing box 1, so that the sludge can enter the shearing mechanism 9. A through hole 909 is provided on the baffle 908 for the extrusion channel 902 to pass through. The baffle 908 is used to limit the sludge to prevent it from entering the sludge output pipe 5, which makes it inconvenient for the sludge to move and discharge.

[0033] Through the above structure, when the pressure inside the treatment box 1 is relatively high, the sludge is squeezed and transported to the inside of the shearing mechanism 9. The sludge first enters the first group of bucket-shaped conveying pipes 901, and then enters the extrusion channel 902 to squeeze the sludge. The sludge is sheared by multiple groups of shear plates 906. The sheared sludge enters the next group of bucket-shaped conveying pipes 901 for multi-stage extrusion, cutting and friction. When the instantaneous pressure inside the treatment box 1 is reduced, the sludge inside the shearing mechanism 9 is driven to flow back and be cut again. By generating an alternating pressure of 0-16MPa in the treatment box 1, the sludge is reciprocatedly cut, so that the biomass cells in part of the sludge are broken, and the separation of water in the cells is promoted. The specific structure is as follows:

[0034] Combined with Figure 3 and attached Figure 4 As shown, the extrusion channel 902 is connected to a mounting ring 903 on one side close to the processing box 1, and the mounting ring 903 is fixedly mounted on the inner side of the sludge output pipe 5 by multiple sets of bolts 904. The mounting ring 903 is fixedly mounted on the inner side of the sludge output pipe 5 for easy disassembly. A limiting ring 907 is provided on the inner wall of the mounting ring 903, and the baffle 908 is fixedly connected to the limiting ring 907 with multiple sets of bolts. The baffle 908 is connected to the limiting ring 907 by multiple sets of bolts, and the baffle 908 is fixedly mounted inside the mounting ring 903.

[0035] Embodiment 2

[0036] Based on Example 1, please refer to the attached Figure 1 and attached Figure 6 A threaded connection sleeve 7 is installed on the processing box 1, and a threaded connection pipe 8 is installed on the outer side of the feeding end of the sludge output pipe 5. The threaded connection pipe 8 is installed inside the threaded connection sleeve 7 in a threaded manner.

[0037] Through the above structure of the second embodiment, the sludge output pipe 5 is installed into the threaded connection sleeve 7 through the threaded connection pipe 8, so that the sludge output pipe 5 is connected with the processing box 1, and the sludge output pipe 5 is easy to load and unload.

[0038] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0039] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0040] The present invention and its embodiments are described above, and such description is not restrictive. The drawings show only one embodiment of the present invention, and the actual structure is not limited thereto. In short, if ordinary technicians in the field are inspired by it, without departing from the purpose of the invention, they can design a structure and embodiment similar to the technical solution without creativity, which should belong to the protection scope of the present invention.

Claims

1. A mechanical shearing device for active cells in municipal domestic sludge, comprising a treatment box (1), wherein the upper side of the treatment box (1) is connected to a sludge conveying pipe (3), characterized in that: A pressure generator (2) is installed through one side wall of the treatment box (1), and a sludge output pipe (5) is connected to the other side wall of the treatment box (1), and a shearing mechanism (9) is installed inside the sludge output pipe (5); The shearing mechanism (9) comprises a plurality of bucket-shaped conveying pipes (901) installed inside the sludge output pipe (5), the tail end of the bucket-shaped conveying pipe (901) is connected to an extrusion channel (902), a plurality of shearing plates (906) are installed inside the extrusion channel (902), and the output end of the extrusion channel (902) extends to the inside of another group of bucket-shaped conveying pipes (901).

2. The mechanical shearing device for active cells in municipal sewage sludge according to claim 1, characterized in that: A mounting ring (903) is connected to one side of the extrusion channel (902) close to the processing box (1), and the mounting ring (903) is fixedly mounted on the inner side of the sludge output pipe (5) by means of a plurality of sets of bolts (904).

3. The mechanical shearing device for active cells in municipal sewage sludge according to claim 2, characterized in that: A baffle (908) is installed on the inner wall of the mounting ring (903), and a through hole (909) is provided on the baffle (908) for the extrusion channel (902) to pass through.

4. The mechanical shearing device for active cells in municipal sewage sludge according to claim 3, characterized in that: A limiting ring (907) is provided on the inner wall of the mounting ring (903), and the baffle (908) is fixedly connected to the limiting ring (907) by means of a plurality of sets of bolts. No baffle (908) is installed inside a set of limiting rings (907) close to the processing box (1).

5. The mechanical shearing device for active cells in municipal sewage sludge according to claim 1, characterized in that: The side of the bucket-shaped conveying pipe (901) close to the processing box (1) is an annular structure, and the other side is a rectangular structure.

6. The mechanical shearing device for active cells in municipal sewage sludge according to claim 1, characterized in that: The opposite side walls of the extrusion channel (902) are provided with mounting grooves (905), the shear plate (906) is inserted between two groups of corresponding mounting grooves (905) and is fixedly connected to the mounting grooves (905) by multiple groups of bolts, and the opposite sides of the shear plate (906) are respectively blade structures.

7. The mechanical shearing device for active cells in municipal sewage sludge according to claim 1, characterized in that: The pressure generator (2) comprises a hydraulic rod and a piston, the extended end of the hydraulic rod drives the piston to move inside the processing box (1), an electric sealing valve (4) is installed on the sludge conveying pipe (3), and an electric sealing valve (10) is provided at the other end of the sludge output pipe (5).

8. The mechanical shearing device for active cells in municipal sewage sludge according to claim 7, characterized in that: A controller (6) connected to a pressure generator (2), an electric sealing valve 1 (4) and an electric sealing valve 2 (10) is installed on an outer wall of one side of the processing box (1).

9. The mechanical shearing device for active cells in municipal sewage sludge according to claim 1, characterized in that: A threaded connection sleeve (7) is installed on the treatment box (1), a threaded connection pipe (8) is installed on the outside of the feed end of the sludge output pipe (5), and the threaded connection pipe (8) is threadably installed inside the threaded connection sleeve (7).

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