Sludge dewatering system and method for elliptically stacked grillage machine

Abstract

The invention relates to a sludge dewatering system for an elliptically-stacked grillage machine. The sludge dewatering system comprises a sludge inlet, a mixing tank, the elliptically-stacked grillage machine, a driving device and an electric control device, the elliptic stacking type grillage machine comprises a grillage machine body, grillage strips and an elliptic stacking piece mechanism. The invention further relates to a working method of the elliptically stacked type grillage machine sludge dewatering system. The elliptically stacked grillage machine has the beneficial effects that the elliptically stacked grillage machine is easy to maintain, low in energy consumption, stable in dehydration, small in occupied area and low in required investment cost, and the grillages are not easy to block; the squeezing plates can be added according to needs so as to deal with the condition of further dehydration requirements; the method is suitable for projects with small sludge particle size, low treatment capacity and low investment budget, and the problem of poor dewatering effect of a conventional grid is solved; according to the working method of the sludge dewatering system of the elliptically stacked grillage machine, the elliptically stacked sheets are adopted to drive sludge to advance, and meanwhile, the grid gaps are cleaned, so that the grid gaps among the grid strips are prevented from being blocked.

Description

Technical Field

[0001] The invention belongs to the technical field of grid sludge dehydration, and in particular relates to an elliptical stacked grid machine sludge dehydration system and method. Background Art

[0002] At present, in dewatering projects in various fields of society, screen machines are widely used in sludge dewatering and pretreatment projects such as urban sewage treatment, industrial wastewater treatment, food sewage treatment, feces, etc. With the rapid growth of population, the process of industrialization and urbanization has greatly increased the amount of sludge to be treated, and put forward higher and more requirements for sludge treatment.

[0003] Conventional screen machines mainly include rotary screens, drum screens, etc.; the main features of conventional screen machines are large processing capacity and easy maintenance, and they are particularly suitable for preliminary pretreatment of sludge. However, conventional screen machines generally have large screen gaps (the screen gap is generally above 3mm), large floor space, and large investment, and are particularly suitable for preliminary pretreatment of sludge. However, conventional screen machines are not ideal for sludge treatment in some projects with small sludge particle size, small sludge processing volume, and small investment budget. Summary of the invention

[0004] The purpose of the present invention is to overcome the deficiencies in the prior art and to provide an elliptical stacked screen machine sludge dewatering system and method.

[0005] The elliptical stacked screen machine sludge dewatering system comprises: a mud inlet, a mixing tank, an elliptical stacked screen machine, a driving device and an electrical control device; the elliptical stacked screen machine comprises a screen machine body, screen bars and an elliptical stacking mechanism;

[0006] The mud inlet is connected to the feed inlet provided on the mixing tank through a channel, and the discharge port provided on the mixing tank is connected to the feed inlet provided on the elliptical stacked grille machine through a transition interface; the elliptical stacked grille machine is provided with a discharge port;

[0007] In the elliptical stacked grid machine, a plurality of grid bars are arranged at uniform intervals in the accommodation space between the feed port and the discharge port. One end of all the grid bars is close to the feed port and fixed on the elliptical stacked grid machine, and the other end of all the grid bars is close to the discharge port and fixed on the elliptical stacked grid machine. The gap between two adjacent grid bars is the grid gap; the width of the grid gap is adjustable;

[0008] A corresponding elliptical lamination mechanism is provided at a set height below each grid gap; each elliptical lamination mechanism is composed of a plurality of elliptical laminations; the center of each elliptical lamination in each elliptical lamination mechanism is axially connected to a respective rotating device at the same height; adjacent elliptical laminations in each elliptical lamination mechanism are perpendicular to each other, and the rotating devices corresponding to all elliptical laminations are electrically connected to the driving device; the driving device is electrically connected to the electrical control device;

[0009] The rotation direction of the elliptical stack is parallel to the length direction of the grid bar, and the rotation space of all the elliptical stacks in each elliptical stack mechanism is the corresponding grid gap; when each elliptical stack rotates to be perpendicular to the grid bar, the upper part of the elliptical stack is higher than the surface of the grid bar by a set length;

[0010] An electrical control device, used to supply power to the driving device and the rotating device, and to control the operation of the driving device;

[0011] The driving device is used to receive control instructions from the electrical control device and drive all the rotating devices to rotate in the same direction at the same time. When all the rotating devices rotate in the same direction at the same time, the angle between the center lines of adjacent elliptical stacks is always maintained at 90 degrees.

[0012] As a preferred embodiment: a water collecting trough is provided at the bottom of the elliptical stacked grille machine, and the internal cavity of the water collecting trough is communicated with the internal cavity of the elliptical stacked grille machine.

[0013] As a preferred embodiment: a pressing plate is provided above the tail of the grid bar of the elliptical stacked grid machine, and the pressing plate is used to pressurize the surface of the grid bar.

[0014] As a preferred embodiment, a dosing device and a stirring shaft are provided in the mixing tank.

[0015] As a preferred embodiment: the elliptical stacked screen machine sludge dewatering system also includes a bracket and a frame; the bracket is arranged at the bottom of the elliptical stacked screen machine and the mixing tank, and is used to support the elliptical stacked screen machine and the mixing tank; the frame is arranged inside the elliptical stacked screen machine, and is used to support the accessories of the elliptical stacked screen machine; the elliptical stacked sheets are elliptical plates.

[0016] Preferably, the width of the grid gap is 0.75 mm to 3 mm.

[0017] The working method of the elliptical stacking screen machine sludge dewatering system comprises the following steps:

[0018] The sludge enters the mixing tank from the mud inlet, and the mixing tank stirs the sludge. After stirring, the sludge enters the elliptical stacked screen machine through the transition interface. The sludge is attached to the surface of the grid bar in the elliptical stacked screen machine. The electrical control device controls the operation of the driving device, and the driving device drives all the rotating devices to rotate in the same direction at the same time. When all the rotating devices rotate in the same direction at the same time, the angle between the center lines of adjacent elliptical stacks is always maintained at 90 degrees, thereby driving all the elliptical stacks to rotate in the same direction at the same time. The sludge continuously moves on the grid bar from the side close to the transition interface to the side close to the discharge port, and the sludge is gradually dehydrated during the movement; the elliptical stack drives the sludge forward while cleaning the grid gap to prevent the grid gap between the grid bars from being blocked.

[0019] Preferably, the above steps are specifically as follows:

[0020] The sludge enters the mixing tank from the mud inlet, and the dosing device in the mixing tank adds medicine. The stirring shaft in the mixing tank stirs the sludge and the added medicine evenly. Under the action of the stirring shaft, the mixture of sludge and medicine enters the elliptical stacked screen machine through the transition interface. The sludge is attached to the surface of the grid bar in the elliptical stacked screen machine. The electrical control device controls the operation of the driving device. The driving device drives all the rotating devices to rotate in the same direction at the same time. When all the rotating devices rotate in the same direction at the same time, the angle between the center lines of adjacent elliptical stacks is always maintained at 90 degrees, thereby driving all the elliptical stacks to rotate in the same direction at the same time. The sludge continuously moves on the grid bar from the side close to the transition interface to the side close to the discharge port, and the sludge is gradually dehydrated during the movement; the elliptical stack drives the sludge forward while cleaning the grid gap to prevent the grid gap between the grid bars from being blocked;

[0021] If the moisture content of the sludge coming out of the discharge port is greater than the set value, a pressing plate is added above the tail of the grid bars of the elliptical stacked grid machine, and the height of the pressing plate is adjusted and / or the width of the grid gap is reduced according to the moisture content of the sludge coming out of the discharge port; if the moisture content of the sludge coming out of the discharge port is less than the set value, the width of the grid gap is expanded and / or the pressing plate is removed.

[0022] The beneficial effects of the present invention are:

[0023] In the present invention, the driving device drives all the rotating devices to rotate in the same direction at the same time. When all the rotating devices rotate in the same direction at the same time, the angle between the center lines of adjacent elliptical laminates is always maintained at 90 degrees, thereby driving all the elliptical laminates to rotate in the same direction at the same time. The sludge continuously moves on the grid bars from the side close to the transition interface to the side close to the discharge port, and the sludge is gradually dehydrated during the movement; the elliptical laminates drive the sludge forward while cleaning the grid gaps to prevent the grid gaps between the grid bars from being blocked.

[0024] The elliptical stacked grille machine of the present invention has a small grille gap (generally about 1 mm), and the grille gap is adjustable within a range of 0.75 mm to 3 mm; the elliptical stacked grille machine of the present invention is easy to maintain, has low energy consumption, stable dehydration, the grille is not easy to be blocked, occupies a small area and requires a low investment cost.

[0025] The elliptical stacked grid machine of the present invention can be equipped with additional pressing plates as required to cope with the situation where further dehydration is required.

[0026] The present invention can be used as a supplementary application method for conventional screen dehydration methods. It is suitable for projects with small sludge particle size, small processing volume and small investment budget (it can be used in sludge dehydration pretreatment processes in food processing, livestock and poultry manure, urban sewage, industrial sewage and other fields). It overcomes the problem of poor dehydration effect of conventional screens and effectively fills the application shortcomings of conventional screen machines. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of an elliptical stacked grid machine;

[0028] Figure 2 It is a schematic diagram of the grid gap of the elliptical stacked grid machine;

[0029] Figure 3 This is a schematic diagram of the sludge dewatering system of the elliptical stacked screen machine;

[0030] Figure 4 The schematic diagram of the sludge dewatering system of the elliptical stacked screen machine equipped with a press plate;

[0031] Figure 5 The upper middle figure is a side view of the material flow diagram of the sludge dewatering process of the elliptical stacked screen machine. Figure 5 The lower middle figure is a top-down view of the material flow diagram of the sludge dewatering process of the elliptical stacked screen machine;

[0032] Figure 6 The status diagram of the elliptical stacked plates and grille bars during sludge transportation and self-cleaning of the grille gap in the elliptical stacked screen machine sludge dewatering system.

[0033] Explanation of the reference numerals: elliptical stacked screen machine 1, discharge port 2, transition interface 3, mixing trough 4, water collecting trough 5, bracket 6, electrical control device 7, pressing plate 8, mud inlet 9, frame 11, elliptical stacked sheets 12, screen bars 13, driving device 14, sludge 15, screen gap sludge 16. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with embodiments. The description of the following embodiments is only used to help understand the present invention. It should be noted that for ordinary persons in the art, without departing from the principle of the present invention, the present invention can also be modified in some ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0035] Example 1

[0036] like Figures 1 to 4 As shown, an elliptical stacked screen machine sludge dewatering system includes: a mud inlet 9, a mixing tank 4, an elliptical stacked screen machine 1, a water collection tank 5, screen bars 13, a driving device 14 and an electrical control device 7; the elliptical stacked screen machine 1 includes a screen machine body, screen bars 13 and an elliptical stacking mechanism; a water collection tank 5 is provided at the bottom of the elliptical stacked screen machine 1, and the internal cavity of the water collection tank 5 is connected to the internal cavity of the elliptical stacked screen machine 1; a pressing plate 8 is provided above the tail of the screen bar 13 of the elliptical stacked screen machine 1, and the pressing plate 8 is used to pressurize the surface of the screen bar 13; the elliptical stacked screen machine sludge dewatering system also includes a bracket 6 and a frame 11; the bracket 6 is provided at the bottom of the elliptical stacked screen machine 1 and the mixing tank 4, and is used to support the elliptical stacked screen machine 1 and the mixing tank 4; the frame 11 is provided inside the elliptical stacked screen machine 1, and is used to support the accessories of the elliptical stacked screen machine 1;

[0037] The mud inlet 9 is connected to the feed inlet provided on the mixing tank 4 through a channel, and the discharge port provided on the mixing tank 4 is connected to the feed inlet provided on the elliptical stacked screen machine 1 through a transition interface 3; a dosing device and a stirring shaft are provided in the mixing tank 4; and a discharge port 2 is provided on the elliptical stacked screen machine 1;

[0038] In the elliptical stacked grid machine 1, a plurality of grid bars 13 are arranged at uniform intervals in the accommodation space between the feed port and the discharge port 2, one end of all the grid bars 13 is close to the feed port and fixed to the elliptical stacked grid machine 1, and the other end of all the grid bars 13 is close to the discharge port 2 and fixed to the elliptical stacked grid machine 1, and the gap between two adjacent grid bars 13 is the grid gap; the width of the grid gap is adjustable in the range of 0.75mm to 3mm;

[0039] A corresponding elliptical stacking mechanism is provided at a set height below each grid gap; each elliptical stacking mechanism is composed of a plurality of elliptical plate-shaped elliptical stacking members 12; the center of each elliptical stacking member 12 in each elliptical stacking mechanism is axially connected to a respective rotating device at the same height; adjacent elliptical stacking members 12 in each elliptical stacking mechanism are perpendicular to each other, and the rotating devices corresponding to all elliptical stacking members 12 are electrically connected to a driving device 14; and the driving device 14 is electrically connected to an electrical control device 7;

[0040] The rotation direction of the elliptical laminate 12 is parallel to the length direction of the grid bar 13, and the rotation space of all the elliptical laminates 12 in each elliptical laminate mechanism is the corresponding grid gap; when each elliptical laminate 12 rotates to be perpendicular to the grid bar 13, the upper part of the elliptical laminate 12 is higher than the surface of the grid bar 13 by a set length;

[0041] An electrical control device 7, used to supply power to the driving device 14 and the rotating device, and to control the operation of the driving device 14;

[0042] The driving device 14 is used to receive control instructions from the electrical control device 7 and drive all the rotating devices to rotate in the same direction at the same time. When all the rotating devices rotate in the same direction at the same time, the angle between the center lines of adjacent elliptical stacks is always maintained at 90 degrees.

[0043] Example 2

[0044] like Figure 5 and Figure 6 As shown, based on Example 1, the working method of the elliptical stacking screen machine sludge dewatering system includes the following steps:

[0045] The sludge 15 enters the mixing tank 4 from the sludge inlet 9, and the dosing device in the mixing tank 4 adds medicine. The stirring shaft in the mixing tank 4 stirs the sludge 15 and the added medicine evenly. Under the action of the stirring shaft, the mixture of the sludge 15 and the medicine enters the elliptical stacked screen machine 1 through the transition interface 3. The sludge 15 is attached to the surface of the grid bar 13 in the elliptical stacked screen machine 1. The electrical control device 7 controls the driving device 14 to work. The driving device 14 drives all the rotating devices to rotate in the same direction at the same time. When all the rotating devices rotate in the same direction at the same time, the angle between the center lines of adjacent elliptical stacks is always maintained at 90 degrees, thereby driving all the elliptical stacks 12 to rotate in the same direction at the same time. The sludge moves continuously on the grid bar 13 from the side close to the transition interface 3 to the side close to the discharge port 2, and the sludge is gradually dehydrated during the movement; the elliptical stack 12 drives the sludge forward (such as Figure 6 Clean the grille gap (as shown in the left figure) Figure 6 (as shown in the middle right picture) to prevent the grille gaps between the grille bars from being blocked;

[0046] If the moisture content of the sludge coming out of the discharge port 2 is greater than the set value, a pressing plate 8 is added above the tail of the grid bar 13 of the elliptical stacked grid machine 1, and the height of the pressing plate 8 is adjusted and / or the width of the grid gap is reduced according to the moisture content of the sludge coming out of the discharge port 2; if the moisture content of the sludge coming out of the discharge port 2 is less than the set value, the width of the grid gap is expanded and / or the pressing plate 8 is removed.

Claims

1. An elliptical stacked screen machine sludge dewatering system, characterized in that: include: A mud inlet (9), a mixing tank (4), an elliptical stacked screen machine (1), a driving device (14) and an electrical control device (7); the elliptical stacked screen machine (1) comprises a screen machine body, screen bars (13) and an elliptical stacked sheet mechanism; The mud inlet (9) is connected to a feed inlet provided on the mixing tank (4) through a channel, and the discharge port provided on the mixing tank (4) is connected to a feed inlet provided on the elliptical stacked screen machine (1) through a transition interface (3); the elliptical stacked screen machine (1) is provided with a discharge port (2); In the elliptical stacked grid machine (1), a plurality of grid bars (13) are arranged at even intervals in the accommodation space between the feed port and the discharge port (2), one end of all the grid bars (13) is close to the feed port and fixed to the elliptical stacked grid machine (1), the other end of all the grid bars (13) is close to the discharge port (2) and fixed to the elliptical stacked grid machine (1), and the gap between two adjacent grid bars (13) is a grid gap; the width of the grid gap is adjustable; A corresponding elliptical stacking mechanism is provided at a set height below each grid gap; each elliptical stacking mechanism is composed of a plurality of elliptical stacks (12); the center of each elliptical stack (12) in each elliptical stacking mechanism is axially connected to a respective rotating device at the same height; adjacent elliptical stacks (12) in each elliptical stacking mechanism are perpendicular to each other, and the rotating devices corresponding to all elliptical stacks (12) are electrically connected to a driving device (14); and the driving device (14) is electrically connected to an electrical control device (7); The rotation direction of the elliptical laminate (12) is parallel to the length direction of the grid bar (13), and the rotation space of all the elliptical laminates (12) in each elliptical laminate mechanism is the corresponding grid gap; when each elliptical laminate (12) rotates to be perpendicular to the grid bar (13), the upper part of the elliptical laminate (12) is higher than the surface of the grid bar (13) by a set length; An electrical control device (7) for supplying power to the driving device (14) and the rotating device, and for controlling the operation of the driving device (14); The driving device (14) is used to receive control instructions from the electrical control device (7) and drive all the rotating devices to rotate in the same direction at the same time.

2. The elliptical stacked screen machine sludge dewatering system according to claim 1, characterized in that: A water collecting trough (5) is provided at the bottom of the elliptical stacked grille machine (1), and the internal cavity of the water collecting trough (5) is communicated with the internal cavity of the elliptical stacked grille machine (1).

3. The elliptical stacked screen machine sludge dewatering system according to claim 1 is characterized by: A pressing plate (8) is provided above the tail of the grid bar (13) of the elliptical stacked grid machine (1), and the pressing plate (8) is used to apply pressure to the surface of the grid bar (13).

4. The elliptical stacked screen machine sludge dewatering system according to claim 1, characterized in that: A dosing device and a stirring shaft are provided in the mixing tank (4).

5. The elliptical stacked screen machine sludge dewatering system according to claim 1 is characterized by: The elliptical stacked screen machine sludge dewatering system further comprises a support (6) and a frame (11); the support (6) is arranged at the bottom of the elliptical stacked screen machine (1) and the mixing tank (4), and is used to support the elliptical stacked screen machine (1) and the mixing tank (4); the frame (11) is arranged inside the elliptical stacked screen machine (1), and is used to support accessories of the elliptical stacked screen machine (1); and the elliptical stacked sheet (12) is in the shape of an elliptical plate.

6. The elliptical stacked screen machine sludge dewatering system according to claim 1, characterized in that: The width of the grid gap is 0.75mm to 3mm.

7. A method for operating the elliptical stacking screen machine sludge dewatering system according to any one of claims 1 to 4, characterized in that: The following steps are involved: The sludge (15) enters the mixing tank (4) through the sludge inlet (9), and the mixing tank (4) stirs the sludge (15). After stirring, the sludge (15) enters the elliptical stacked screen machine (1) through the transition interface (3). The sludge (15) is attached to the surface of the screen bar (13) in the elliptical stacked screen machine (1). The electrical control device (7) controls the driving device (14) to work. The driving device (14) drives all the rotating devices to rotate in the same direction at the same time, thereby driving all the elliptical stacked plates (12) to rotate in the same direction at the same time. The sludge continuously moves on the screen bar (13) from the side close to the transition interface (3) to the side close to the discharge port (2). The sludge is gradually dehydrated during the movement. The elliptical stacked plates (12) drive the sludge forward while cleaning the screen gap.

8. The working method of the elliptical stacked screen machine sludge dewatering system according to claim 7, characterized in that: The above steps are as follows: The sludge (15) enters the mixing tank (4) through the sludge inlet (9), and the dosing device in the mixing tank (4) adds the drug. The stirring shaft in the mixing tank (4) stirs the sludge (15) and the added drug evenly. Under the action of the stirring shaft, the mixture of the sludge (15) and the drug enters the elliptical stacked screen machine (1) through the transition interface (3). The sludge (15) is attached to the surface of the grid bar (13) in the elliptical stacked screen machine (1). The electrical control device (7) controls the driving device (14) to work. The driving device (14) drives all the rotating devices to rotate in the same direction at the same time, thereby driving all the elliptical stacked plates (12) to rotate in the same direction at the same time. The sludge moves continuously on the grid bar (13) from the side close to the transition interface (3) to the side close to the discharge port (2). The sludge is gradually dehydrated during the movement. The elliptical stacked plates (12) drive the sludge forward while cleaning the grid gap. If the water content of the sludge coming out of the discharge port (2) is greater than a set value, a pressing plate (8) is added above the tail of the grid bars (13) of the elliptical stacked grid machine (1), and the height of the pressing plate (8) is adjusted and / or the width of the grid gap is reduced according to the water content of the sludge coming out of the discharge port (2); If the water content of the sludge coming out of the discharge port (2) is less than the set value, the width of the screen gap is increased and / or the pressing plate (8) is removed.

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