Sludge cracking device

Abstract

The utility model relates to the technical field of sludge treatment, in particular to a sludge cracking device. The sludge cracking device comprises a shell, a stirring assembly, a ball-milling assembly, a sludge inlet pipe and a sludge outlet pipe, a body is provided with a chemical feeding pipe communicated with a containing cavity, the stirring assembly comprises a driving power source, a stirring shaft and stirring blades, the ball-milling assembly is used for colliding with sludge particles in the containing cavity, and the overall structure is simplified; according to the present invention, the chemical adding pipe is adopted to perform chemical adding, the design of the stirring blade and the ball milling assembly is combined so as to achieve the combination of alkaline hydrolysis and ball milling cracking, and the cells of the microorganisms in the sludge are broken under the strong alkaline environment and the collision extrusion of the ball milling ball body, such that compared with the single alkaline hydrolysis or ball milling cracking manner, the combined cracking mode has the advantages of higher sludge cracking efficiency and low comprehensive cost.

Description

TECHNICAL FIELD

[0001] The utility model relates to a sludge treatment technical field, concretely relates to a sludge disintegrating device. BACKGROUND

[0002] Sludge disintegration is a key pretreatment process of sludge resource and reduction process. The purpose of sludge disintegration is to destroy sludge floc structure, fully release microbial intracellular solutes, and greatly improve the recovery and utilization efficiency of organic matter, phosphorus, nitrogen and other resources, while realizing the reduction of residual sludge solid matter.

[0003] The common methods of sludge disintegration include physical method, chemical method, biological method and combined treatment method. The physical method includes ultrasonic method, heating method and mechanical disintegration method, etc. The ultrasonic disintegration and heating disintegration have high cost, and the mechanical disintegration treatment has lower cost. The chemical method includes advanced oxidation method and acid-base method, and has relatively high disintegration efficiency. The biological method mainly includes anaerobic digestion and enzymatic hydrolysis method. The anaerobic digestion disintegration needs a long time, and the enzymatic disintegration has high price and is difficult to be applied to actual engineering production. The combined treatment method can combine the advantages of various disintegration methods, and is a common process in sludge resource and reduction engineering.

[0004] In addition, the following technologies are disclosed in the prior art:

[0005] ①. The utility model patent CN209468285U discloses a sludge solidification stirring device with disintegration capacity. The device disintegrates sludge through the ball milling function of steel balls. However, the steel balls have large density and are deposited at the bottom of the device, which are difficult to be stirred by stirring blades, and it is difficult to produce ball milling disintegration on sludge. The actual disintegration efficiency of sludge is low.

[0006] ②. The invention application CN109607814A discloses a residual sludge alkaline hydrolysis process. The process realizes the effect of continuous operation by connecting multiple sludge treatment systems in series. Multiple reaction devices are needed, and heating is required. The process has large land occupation, high investment and operation cost, and complex control system.

[0007] Therefore, it is of great significance to develop a sludge disintegrating device with simple structure and capable of economically and efficiently disintegrating sludge. Utility model content

[0008] The utility model aims at providing a sludge disintegrating device with simple structure and capable of economically and efficiently disintegrating sludge, and the specific technical scheme is as follows:

[0009] A sludge disintegrating device comprises a shell, a stirring assembly, a ball milling assembly, a sludge inlet pipe and a sludge outlet pipe.

[0010] The shell comprises a body with a containing cavity, the inlet pipe and the outlet pipe are arranged on the body and communicate with the containing cavity;

[0011] A dosing pipe is arranged on the body and communicates with the containing cavity.

[0012] The stirring assembly comprises a driving power source, a stirring shaft and stirring blades, the driving power source is arranged on the shell, the connecting end of the stirring shaft is connected with the output end of the driving power source, the free end of the stirring shaft is arranged in the containing cavity and the stirring blades are arranged on the free end.

[0013] The ball milling assembly is arranged in the containing cavity and is used to collide with sludge particles in the containing cavity.

[0014] Preferably, a pH controller is further arranged, a measuring hole is arranged on the body and communicates with the containing cavity, and the pH controller is arranged at the measuring hole and is used to measure the pH value of the sludge.

[0015] Preferably, the pH controller is connected with an external PLC control system, and the pH controller measures the pH value of the sludge through a measuring electrode; the measuring electrode is arranged at the measuring hole and a protective net is arranged on the outside of the measuring electrode.

[0016] Preferably, a plurality of layers of the stirring blades are arranged on the stirring shaft along the axial direction of the stirring shaft.

[0017] Preferably, the ball milling assembly comprises a plurality of ball milling balls with a diameter of 3-4 mm, and the effective volume of the ball milling assembly in the containing cavity is 10-20%.

[0018] Preferably, a valve and a filter screen are arranged on the outlet pipe, and the mesh size of the filter screen is smaller than the size of the ball milling balls.

[0019] Preferably, a plurality of protrusions are further arranged on the inner wall of the containing cavity and face the center of the containing cavity.

[0020] Preferably, the protrusions are semispherical protrusions with a radius of 40-80 mm, and the plurality of protrusions are uniformly distributed on the inner wall of the containing cavity.

[0021] Preferably, a stench collecting pipe is further arranged on the body and is used to collect the stench generated in the containing cavity.

[0022] Preferably, the inlet pipe communicates with the containing cavity and is arranged at the lower part of the containing cavity, and the outlet pipe communicates with the containing cavity and is arranged at the upper part of the containing cavity.

[0023] The technical scheme of the present application has the following beneficial effects:

[0024] (1) The sludge breaking device of the utility model includes a shell, a stirring assembly, a ball milling assembly, a sludge inlet pipe and a sludge outlet pipe, a dosing pipe is arranged on the body and is communicated with the accommodating cavity, the stirring assembly includes a driving power source, a stirring shaft and stirring blades, the ball milling assembly is used for colliding with sludge particles in the accommodating cavity, and the overall structure is simple; the dosing pipe is used for adding medicine, the stirring blades and the ball milling assembly are combined, alkali decomposition and ball milling breaking are combined, the cells of microorganisms in the sludge are broken under the strong alkaline environment and the collision and extrusion of the ball milling balls, compared with single alkali decomposition or ball milling breaking, the combined breaking mode of the utility model has the advantages of higher sludge breaking efficiency and lower comprehensive cost.

[0025] (2) The utility model also includes a pH controller for measuring the pH value of the sludge, the pH value of the sludge can be accurately obtained, the amount of medicine in the dosing pipe and the rotation rate of the driving power source in the stirring assembly can be adjusted to achieve the best sludge breaking effect, and the cost can be saved.

[0026] (3) In the utility model, the stirring shaft is provided with multiple layers of stirring blades along the axial direction, and the ball milling assembly includes multiple ball milling balls with a diameter of 3-4 mm, and the accommodating cavity is filled with 10-20% of the ball milling assembly in effective volume. The collision between the sludge, the stirring blades and the ball milling assembly in the accommodating cavity is further strengthened, and the sludge breaking efficiency is improved.

[0027] (4) The sludge outlet pipe is provided with a valve and a filter screen, and the mesh size of the filter screen is smaller than the size of the ball milling balls. The ball milling balls can be effectively prevented from flowing out of the sludge outlet pipe.

[0028] (5) The inner wall of the accommodating cavity is also provided with multiple protrusions towards the center of the accommodating cavity, preferably semispherical protrusions with a radius of 40-80 mm, and the multiple protrusions are uniformly distributed on the inner wall of the accommodating cavity. The design of the protrusions can strengthen the turbulence degree of the fluid in the accommodating cavity and further increase the collision frequency and intensity of the sludge particles and the ball milling balls in the accommodating cavity.

[0029] In addition to the purposes, features and advantages described above, the utility model has other purposes, features and advantages. The utility model will be further described in detail below with reference to the drawings. BRIEF DESCRIPTION OF DRAWINGS

[0030] The drawings constituting a part of the present application are used to provide a further understanding of the utility model, and the schematic embodiments of the utility model and the description thereof are used to explain the utility model and do not constitute an improper limitation on the utility model. In the drawings:

[0031] Figure 1 is the structure schematic view of the sludge breaking device in the preferred embodiment of the utility model;

[0032] The components include: 1. Shell, 1.1. Receiving cavity, 1.2. Body, 1.3. Protrusion; 2. Stirring assembly, 2.1. Drive power source, 2.2. Stirring shaft, 2.3. Stirring blades; 3. Ball mill assembly; 4. Mud inlet pipe; 5. Mud outlet pipe; 6. Dosing pipe; 7. pH controller, 7.1. Measuring electrode; 8. Odor collection pipe; 9. Removable cover plate; 10. Valve; 11. Filter screen. Detailed Implementation

[0033] The embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, the present invention can be implemented in many different ways as defined and covered by the claims.

[0034] Example:

[0035] See Figure 1 A sludge breaking device includes a shell 1, a stirring assembly 2, a ball mill assembly 3, a sludge inlet pipe 4, and a sludge outlet pipe 5.

[0036] The housing 1 includes a body 1.2 with a receiving cavity 1.1. The body 1.2 is a cylindrical housing with an opening at its upper end and a removable cover plate 9 at the opening.

[0037] Both the sludge inlet pipe 4 and the sludge outlet pipe 5 are mounted on the main body 1.2 and are connected to the receiving cavity 1.1. In this embodiment, the sludge inlet pipe 4 is connected to the receiving cavity 1.1 and located at the lower part of the receiving cavity 1.1, while the sludge outlet pipe 5 is connected to the receiving cavity 1.1 and located at the upper part of the receiving cavity 1.1. That is, the sludge enters from the lower part of the receiving cavity and exits from the upper part of the receiving cavity.

[0038] The main body 1.2 is provided with a dosing pipe 6 that communicates with the receiving cavity 1.1. The dosing pipe 6 is connected to an external dosing device. A flow regulating switch is provided on the pipeline connecting the dosing pipe and the dosing device to regulate the amount of dosing in the dosing pipe 6.

[0039] The stirring assembly 2 includes a drive power source 2.1, a stirring shaft 2.2, and stirring blades 2.3. The drive power source 2.1 is mounted on the housing 1. Figure 1The driving power source is a driving motor, which is arranged on the detachable cover plate, and the whole stirring assembly can be taken out of the containing cavity through the detachable cover plate; the connecting end of the stirring shaft 2.2 is connected with the output end of the driving power source 2.1, and the free end of the stirring shaft 2.2 is arranged in the containing cavity 1.1 and is provided with the stirring blades 2.3. In the embodiment, the stirring shaft 2.2 is provided with two layers of the stirring blades 2.3 along the axial direction of the stirring shaft, one layer of the stirring blades is arranged at the position close to the end of the free end of the stirring shaft, and the other layer of the stirring blades is arranged at the middle position of the stirring shaft. The stirring shaft 2.2 is located on the axis of the containing cavity. The multiple layers of the stirring blades 2.3 rotate to generate upward thrust on the fluid.

[0040] The ball milling assembly 3 is arranged in the containing cavity 1.1 and is used to collide with the sludge particles in the containing cavity 1.1. In the embodiment, the ball milling assembly 3 includes multiple ball milling balls with a diameter of 3-4 mm; and the effective volume of the ball milling assembly accounts for 10-20% (further preferably 15%) of the containing cavity 1.1. In the embodiment, the ball milling balls are made of 30% glass fiber reinforced injection molding grade PA66 material (density 1.15-1.35 g / cm 3 ), which has good wear resistance and light weight, and is easier to realize fluidization than high-density ball milling balls, thereby avoiding the deposition of the ball milling balls on the bottom of the containing cavity.

[0041] The embodiment also includes a pH controller 7, the body 1.2 is provided with a measuring hole in communication with the containing cavity 1.1, and the pH controller is arranged at the measuring hole and used to measure the pH value of the sludge. The pH controller is connected with an external PLC control system, and the pH controller measures the pH value of the sludge through a measuring electrode 7.1; the measuring electrode is arranged at the measuring hole, and the outer side of the measuring electrode is provided with a protective net. The measuring electrode can be deep into the liquid surface below the containing cavity. The design of the protective net can prevent the measuring electrode from being damaged by the collision of the ball milling balls during operation, thereby prolonging the service life of the measuring electrode.

[0042] The sludge outlet pipe 5 is provided with a valve 10 and a filter screen 11, the mesh size of the filter screen is smaller than the size of the ball milling balls, and the ball milling balls are prevented from flowing out of the sludge outlet pipe. In the embodiment, the valve 10 and the filter screen 11 can also be arranged on the sludge inlet pipe, as shown in Figure 1 .

[0043] The inner wall of the accommodating cavity 1.1 is further provided with a plurality of protrusions 1.3 towards the center of the accommodating cavity in the embodiment.

[0044] In the embodiment, the body 1.2 is further provided with a foul gas collecting pipe 8 for collecting the foul gas generated in the accommodating cavity.

[0045] Figure 1 In the embodiment, the foul gas collecting pipe and the dosing pipe both pass through the detachable cover plate 9.

[0046] The technical scheme of the embodiment is applied, specifically:

[0047] The sludge disintegration device in the utility model disintegrates sludge by combining mechanical disintegration and chemical alkaline hydrolysis, can realize continuous feeding and discharging, and can also realize sequencing batch operation mode.

[0048] In the continuous operation mode, sludge enters the inside of the accommodating cavity 1.1 of the shell 1 through the sludge inlet pipe 4, the pH controller 7 is connected with an external PLC control system, the pH value of the sludge in the accommodating cavity is measured through the measuring electrode 7.1, the amount of the chemical added into the dosing pipe 6 communicating with the accommodating cavity 1.1 is controlled according to the preset target pH value, the driving power source 2.1 in the stirring assembly 2 drives the stirring shaft 2.2 and the stirring blades 2.3 thereon to rotate, and the sludge in the inside of the accommodating cavity and the ball mill balls in the ball mill assembly 3 are stirred and mixed, a large number of protrusions 1.3 on the vertical inner side wall of the accommodating cavity strengthen the turbulence degree of the fluid in the accommodating cavity, further increase the collision frequency and intensity of the sludge particles and the ball mill balls, the cells of the microorganisms in the sludge are ruptured under the strong alkaline environment and the collision and extrusion of the ball mill balls, the disintegration is completed, and the disintegrated sludge is discharged through the sludge outlet pipe 5.

[0049] The filter screens arranged on the sludge inlet pipe and the sludge outlet pipe can prevent the ball mill balls from escaping from the sludge disintegration device, so as to reduce the loss of the ball mill balls.

[0050] When the sequencing batch mode is adopted: the sludge enters the inside of the containing cavity 1.1 of the shell 1 through the sludge inlet pipe 4, and the sludge inlet is stopped when the sludge reaches the height of the sludge outlet, and the valves on the sludge inlet pipe 4 and the sludge outlet pipe 5 are closed; the stirring assembly 2 and the pH controller 7 are started, the pH controller is connected with the external PLC control system, the pH value of the sludge is measured through the measuring electrode 7.1, the external dosing system is controlled to deliver an appropriate amount of medicine into the dosing pipe 6 according to the preset target pH value, and the medicine (preferably the alkali in the utility model) enters the containing cavity 1.1 of the shell 1 through the dosing pipe; the driving power source 2.1 in the stirring assembly 2 drives the stirring shaft 2.2 and the stirring blades 2.3 thereon to rotate, the sludge and the ball mill balls are stirred and mixed, and the large number of protrusions on the vertical inner side wall of the containing cavity 1.1 strengthen the turbulence degree of the fluid in the containing cavity, and further increase the collision frequency and intensity of the sludge particles and the ball mill balls; the microorganisms in the sludge are broken under the strong alkaline environment and the collision and extrusion of the ball mill balls, and after a certain time, the broken sludge is discharged through the branch pipe discharge device arranged on the bottom sludge inlet pipe, and the filter screen arranged on the sludge inlet pipe can prevent the ball mill balls from escaping from the device.

[0051] The technical scheme of the embodiment has the following effects:

[0052] ①, The sludge breaking device of the utility model adopts the combination of alkali dissolution and ball mill breaking, the microorganisms in the sludge are broken under the strong alkaline environment and the collision and extrusion of the ball mill balls, compared with single alkali dissolution or ball mill breaking, the combined breaking mode of the sludge breaking device of the utility model has the advantages of higher sludge breaking efficiency and lower comprehensive cost.

[0053] ②, The ball mill balls are made of 30% glass fiber reinforced injection molding grade PA66 material (density 1.15~1.35g / cm 3 ), which has good wear resistance and light weight, and is easier to realize fluidization than high-density ball mill balls, avoiding the deposition of ball mill balls at the bottom of the containing cavity.

[0054] ③, The semicircular protrusions arranged on the inner side wall of the containing cavity can avoid the regular circular motion of the ball mill balls along the tank wall, enhance the turbulence intensity in the shell, increase the collision probability of the ball mill balls, make the microorganisms in the sludge collide and extrude at a higher frequency, and improve the breaking efficiency.

[0055] ④, The pH controller is connected with the external PLC control system, the pH value of the sludge in the containing cavity is measured through the measuring electrode, the dosing system can be controlled according to the demand to obtain the optimal amount of medicine and achieve the best sludge breaking effect, precise dosing control can be realized, and the cost of medicine can be saved.

[0056] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A sludge disintegration device, characterized by The shell (1), the stirring assembly (2), the ball milling assembly (3), the sludge inlet pipe (4) and the sludge outlet pipe (5) are included. The shell (1) includes a body (1.2) with a containing cavity (1.1), the sludge inlet pipe (4) and the sludge outlet pipe (5) are arranged on the body (1.2) and communicate with the containing cavity (1.1). The body (1.2) is provided with a dosing pipe (6) communicating with the containing cavity (1.1). The stirring assembly (2) includes a driving power source (2.1), a stirring shaft (2.2) and stirring blades (2.3), the driving power source (2.1) is arranged on the shell (1), the connecting end of the stirring shaft (2.2) is connected with the output end of the driving power source (2.1), the free end of the stirring shaft (2.2) is arranged in the containing cavity (1.1) and is provided with the stirring blades (2.3) thereon. The ball milling assembly (3) is used to collide with sludge particles in the containing cavity (1.1) and is arranged in the containing cavity (1.1).

2. The sludge disintegration device according to claim 1, characterized in that A pH controller (7) is further included, the body (1.2) is provided with a measuring hole communicating with the containing cavity (1.1), and the pH controller is arranged at the measuring hole and used to measure the pH value of sludge.

3. The sludge disintegration device according to claim 2, characterized in that The pH controller is connected with an external PLC control system, and the pH controller measures the pH value of sludge through a measuring electrode. The measuring electrode is arranged at the measuring hole and is provided with a protective net outside.

4. The sludge disintegration device according to claim 1, characterized in that The stirring shaft (2.2) is provided with multiple layers of the stirring blades (2.3) at intervals along the axial direction thereof.

5. The sludge disintegration device according to claim 1, characterized in that The ball milling assembly (3) includes multiple ball milling spheres with a diameter of 3-4 mm, and the containing cavity (1.1) is filled with the ball milling assembly (3) with an effective volume of 10-20%.

6. The sludge disintegration device according to claim 5, characterized in that The sludge outlet pipe (5) is provided with a valve and a filter screen, and the mesh size of the filter screen is smaller than the size of the ball milling spheres.

7. The sludge disintegrating device according to any one of claims 1 to 6, characterized in that The inner wall of the containing cavity (1.1) is further provided with multiple protrusions (1.3) towards the center of the containing cavity.

8. The sludge disintegration device according to claim 7, characterized in that The protrusions (1.3) are semispherical protrusions with a radius of 40-80 mm, and multiple protrusions (1.3) are distributed on the inner wall of the containing cavity.

9. The sludge disintegration device according to claim 7, characterized in that The body (1.2) is further provided with a stench collecting pipe (8) used to collect stench generated in the containing cavity.

10. The sludge disintegration device according to claim 7, characterized in that The sludge inlet pipe (4) communicates with the containing cavity (1.1) and is located at the lower part of the containing cavity (1.1), and the sludge outlet pipe (5) communicates with the containing cavity (1.1) and is located at the upper part of the containing cavity (1.1).

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