阅读说明：本技术 一种超临界高压脱水机 (Supercritical high-pressure dehydrator ) 是由 席晓惠 于 2021-08-27 设计创作，主要内容包括：本发明涉及脱水机技术领域,公开了一种超临界高压脱水机,包括：机架、滤网、第一伸缩机构和第二伸缩机构,滤网为螺旋弹簧状结构,螺旋弹簧状结构的内部用于通入过滤物,螺旋弹簧状结构的侧壁用于滤出液体,滤网固定于机架上,滤网与机架的侧壁留有间隙,第一伸缩机构固定端固定于机架上,伸缩端朝向滤网的第一开口端,第一伸缩机构的伸缩端能够经第一开口端延伸入滤网内部,第二伸缩机构固定端固定于机架,与第一伸缩机构对称的设置于滤网的两侧,第一伸缩机构及第二伸缩机构的伸缩端各固连有一封堵件,封堵件的外径与滤网的内径尺寸配合,本发明提供一种超临界高压脱水机,能够缩短进料、保压和卸料时间。(The invention relates to the technical field of dewaterers, and discloses a supercritical high-pressure dewaterer, which comprises: the supercritical high-pressure dehydrator comprises a rack, a filter screen, a first telescopic mechanism and a second telescopic mechanism, wherein the filter screen is of a spiral spring-shaped structure, the inside of the spiral spring-shaped structure is used for introducing filter substances, the side wall of the spiral spring-shaped structure is used for filtering liquid, the filter screen is fixed on the rack, a gap is reserved between the filter screen and the side wall of the rack, the fixed end of the first telescopic mechanism is fixed on the rack, the telescopic end of the first telescopic mechanism faces towards the first opening end of the filter screen, the telescopic end of the first telescopic mechanism can extend into the inside of the filter screen through the first opening end, the fixed end of the second telescopic mechanism is fixed on the rack and symmetrically arranged on two sides of the filter screen with the first telescopic mechanism, and the telescopic ends of the first telescopic mechanism and the second telescopic mechanism are fixedly connected with plugging pieces respectively, and the outer diameters of the plugging pieces are matched with the inner diameter of the filter screen.)

1. The utility model provides a supercritical high-pressure dehydrator, includes frame (1), its characterized in that still includes:

the filter screen (5) is of a spiral spring-shaped structure, filter materials are introduced into the spiral spring-shaped structure, the side wall of the spiral spring-shaped structure is used for filtering out liquid, the filter screen (5) is fixed on the rack (1), and a gap is reserved between the filter screen (5) and the side wall of the rack (1);

the fixed end of the first telescopic mechanism (2) is fixed on the rack (1), the telescopic end faces the first opening end of the filter screen (5), and the telescopic end of the first telescopic mechanism (2) can extend into the filter screen (5) through the first opening end;

second telescopic machanism (6), stiff end are fixed in frame (1), with first telescopic machanism (2) symmetry set up in the both sides of filter screen (5), the flexible end of second telescopic machanism (6) can pass through the second open end of filter screen (5) extends into inside filter screen (5), the flexible end of first telescopic machanism (2) and second telescopic machanism (6) respectively has linked firmly a shutoff piece (3), the external diameter of shutoff piece (3) with the internal diameter size cooperation of filter screen (5).

2. Supercritical high-pressure dehydrator according to claim 1 wherein the helical pitch of screen (5) is 0-1.0 mm.

3. The supercritical high pressure dehydrator according to claim 1 further comprising:

the backwashing pipeline (7) is fixed on the rack (1), the outlet end of the backwashing pipeline (7) is positioned on the water filtering side of the filter screen (1), and the water filtering side is the side where water passes through the filter screen (5);

the feeding pipeline (8) is fixed on the rack (1), the outlet end of the feeding pipeline (8) is introduced into the mud filtering side of the filter screen (5), the mud filtering side is the side where the mud stays on the filter screen (5), and the mud filtering side and the water filtering side are respectively positioned on two sides of the filter screen (5);

and the filtered water discharge pipeline (9) is fixed on the rack (1), and the inlet end of the filtered water discharge pipeline (9) is arranged at the same side as the backwashing pipeline (7).

4. Supercritical high-pressure dehydrator according to claim 1, characterized in that between the end of the sieve (5) in its longitudinal direction and the frame (1) is connected an adjusting mechanism (11), said adjusting mechanism (11) being adapted to adjust the longitudinal length of the sieve (5).

5. Supercritical high-pressure dehydrator according to claim 4, characterized in that a first end of the sieve (5) in its longitudinal direction is attached to a first end of the frame (1), and that the adjusting mechanism (11) is connected between a second end of the sieve (5) in its longitudinal direction and a second end of the frame (1).

6. Supercritical high-pressure dehydrator according to claim 4, characterized in that the adjusting mechanism (11) comprises an adjusting bolt, which is in threaded connection with the second end of the frame (1), the end of the adjusting bolt abutting against the second end of the sieve (5).

7. Supercritical high-pressure dehydrator according to claim 1, characterized in that said sieve (5) is one.

8. The supercritical high-pressure dehydrator according to claim 1, wherein there are a plurality of said screens (5), a plurality of said screens (5) are nested together in a concentric circle, a plurality of said screens (5) are not in contact with each other, and the outlet end of one of said feed pipes (8) is open into the cavity formed between two adjacent screens (5).

9. The supercritical high-pressure dehydrator according to claim 8, wherein one plugging element (3) is attached to a top cylinder (4), the outer diameter of the top cylinder (4) is matched with the inner diameter of the strainer (5), the top cylinder (4) has a plurality of concentric annular chutes along its axial direction, and the annular chutes are in one-to-one correspondence with the positions of the strainers (5).

10. The supercritical high-pressure dehydrator according to claim 9, wherein two ends of the filter screen (5) are respectively provided with a sealing mechanism (10), the sealing mechanisms (10) are fixed on the frame (1), and the sealing mechanisms (10) are in sealing fit with the top cylinder (4).

Technical Field

The invention relates to the technical field of dewaterers, in particular to a supercritical high-pressure dewaterer.

Background

At present, domestic dehydrators can be divided into the following parts according to dehydration pressure: supercritical high-pressure dehydrator (8-15Mpa), ultrahigh-pressure dehydrator (6-8MPa), high-pressure dehydrator (3-6MPa), medium-pressure dehydrator (1.6-3MPa) and low-pressure dehydrator (less than or equal to 1.6MPa), can divide into according to the structural style scope: plate and frame filter presses (square or round), belt sludge dewaterers and stacked screw sludge dewaterers.

Circular ultrahigh-pressure hydroextractor belongs to high-pressure hydroextractor, and highest operating pressure is 4-5 Mpa, and circular ultrahigh-pressure hydroextractor's filter screen is non-metallic material, and the filter chamber comprises a plurality of relative airtight rooms, and the similar window screening structure of filter screen, this constitutional equipment's main advantage: the system working pressure is higher, and the sludge dewatering effect is better, and the mud moisture content after the dehydration can reach about 55%, and the major defect has: the filter screen compressive strength is lower, and life is short, and it is higher to change the filter screen cost, and user's use expense is big, and system treatment mud is the discontinuity processing procedure, and its feeding, pressurize, the time of unloading are longer, need be with the help of the air blowback function during the unloading, otherwise the mud cake glues to be assisted on the filter screen in the die cavity, washs the difficulty, and productivity ratio is folded spiral shell machine, belt sludge dewaterer and is hanged down.

Disclosure of Invention

The invention provides a supercritical high-pressure dehydrator which can shorten the time of feeding, pressure maintaining and discharging.

The invention provides a supercritical high-pressure dehydrator, which comprises:

a frame;

the filter screen is of a spiral spring-shaped structure, filter materials are introduced into the spiral spring-shaped structure, the side wall of the spiral spring-shaped structure is used for filtering liquid, the filter screen is fixed on the rack, and a gap is reserved between the filter screen and the side wall of the rack;

the fixed end of the first telescopic mechanism is fixed on the rack, the telescopic end faces the first opening end of the filter screen, and the telescopic end of the first telescopic mechanism can extend into the filter screen through the first opening end;

the fixed end of the second telescopic mechanism is fixed on the rack, the second telescopic mechanism and the first telescopic mechanism are symmetrically arranged on two sides of the filter screen, the telescopic end of the second telescopic mechanism can extend into the filter screen through the second opening end of the filter screen, the telescopic ends of the first telescopic mechanism and the second telescopic mechanism are respectively and fixedly connected with a plugging piece, and the outer diameter of the plugging piece is matched with the inner diameter of the filter screen.

Optionally, the spiral pitch of the filter screen is 0-1.0 mm.

Optionally, the method further includes:

the back washing pipeline is fixed on the frame, the outlet end of the back washing pipeline is positioned on the water filtering side of the filter screen, and the water filtering side is the side where water passes through the filter screen;

the feeding pipeline is fixed on the frame, the outlet end of the feeding pipeline is introduced into the mud filtering side of the filter screen, the mud filtering side is the side where the mud stays on the filter screen, and the mud filtering side and the water filtering side are respectively positioned on the two sides of the filter screen;

and the filtered water discharge pipeline is fixed on the rack, and the inlet end of the filtered water discharge pipeline is arranged at the same side as the backwashing pipeline.

Optionally, an adjusting mechanism is connected between the longitudinal end of the filter screen and the frame, and the adjusting mechanism is used for adjusting the longitudinal length of the filter screen.

Optionally, the filter screen is fixedly connected to the first end of the frame along a longitudinal first end portion of the filter screen, and the adjusting mechanism is connected between the second end of the filter screen and the second end of the frame along a longitudinal second end portion of the filter screen.

Optionally, the adjusting mechanism includes an adjusting bolt, the adjusting bolt is screwed with the second end of the frame, and the end of the adjusting bolt tightly abuts against the second end of the filter screen.

Optionally, there is one filter screen.

Optionally, the filter screens are multiple, the filter screens are nested together in sequence in a concentric circle manner, the filter screens are not in contact with each other, and the outlet end of a feeding pipeline is introduced into a cavity formed between every two adjacent filter screens.

Optionally, one plugging piece is fixedly connected with a top cylinder, the outer diameter of the top cylinder is matched with the inner diameter of the filter screen in size, the top cylinder is provided with a plurality of concentric annular sliding grooves along the axial direction of the top cylinder, and the annular sliding grooves correspond to the positions of the filter screen one by one.

Optionally, two ends of the filter screen are respectively provided with a sealing mechanism, the sealing mechanisms are fixed on the frame, and the sealing mechanisms are in sealing fit with the top cylinder.

Compared with the prior art, the invention has the beneficial effects that: the invention processes the filter screen into the structure form of the spiral spring made like flat steel, when dewatering, the muddy water is pressurized by the high-pressure ceramic plunger pump and then sent into the dewatering cavity of the dewatering machine through the feeding pipeline, the feeding pipeline has the function of stirring at the same time, the water flows out of the dewatering cavity through the gap of the filter screen to separate the sludge and the water, the dewatering machine provided by the invention can filter the sludge with different sizes by adjusting the spiral pitch of the filter screen, the sludge with smaller size can be filtered by adding little or no chemical reagent, meanwhile, the system working pressure is increased to be not less than 10Mpa, the dewatering requirements of low, medium and high and ultra-critical high pressure can be met, the wall breaking pressure value exceeding the water molecules of the sludge can dewater the sludge with the water content of 98 percent to the water content of 40 to 50 percent, the sludge volume is reduced by more than 90 percent, the service life of the filter screen is long, the replacing times of the filter screen are reduced, the medium-high pressure dehydrator is easy to wash and convenient to replace, the unit dehydration energy consumption of the medium-high pressure dehydrator is greatly reduced, energy is saved, sludge can be treated discontinuously, the production rate is high, the sludge dewatering requirements of all current sewage plants can be met, the sludge in the filter screen can be extruded through the relative motion of the first telescopic mechanism and the second telescopic mechanism after the sludge is treated through the matching of the filter screen and the first telescopic mechanism and the second telescopic mechanism, the sludge in the filter screen can be extruded through the relative motion of the first telescopic mechanism and the second telescopic mechanism after the sludge is formed into sludge cakes, the sludge cakes in the filter screen can drop from the filter screen through the withdrawing of the first telescopic mechanism or the second telescopic mechanism, the other telescopic mechanism can continue to extrude the sludge cakes, the feeding, pressure maintaining and discharging time can be shortened without the help of an air back blowing function, and the manufacturing cost is far lower than that of a round ultrahigh pressure dehydrator.

Drawings

Fig. 1 is a schematic structural diagram of a filter screen according to an embodiment of the present invention, wherein D1 is an inner diameter, D2 is an outer diameter, D is an intermediate diameter, and f is a spiral pitch;

fig. 2 is a front view of a supercritical high-pressure dehydrator according to an embodiment of the present invention;

fig. 3 is a top view of a supercritical high-pressure dehydrator according to an embodiment of the present invention;

fig. 4 is a left side view of a supercritical high-pressure dehydrator according to an embodiment of the present invention;

fig. 5 is a sectional view taken along line a-a in fig. 4.

Description of reference numerals:

1-a frame, 2-a first telescopic mechanism, 3-a blocking piece, 4-a top cylinder, 5-a filter screen, 6-a second telescopic mechanism, 7-a backwashing pipeline, 8-a feeding pipeline, 9-a filtered water discharge pipeline, 10-a sealing mechanism and 11-an adjusting mechanism.

Detailed Description

An embodiment of the present invention will be described in detail below with reference to the accompanying drawings, but it should be understood that the scope of the present invention is not limited to the embodiment.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing technical solutions of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

At present, domestic dehydrators can be divided into the following parts according to dehydration pressure: supercritical high-pressure dehydrator (8-15Mpa), ultrahigh-pressure dehydrator (6-8MPa), high-pressure dehydrator (3-6MPa), medium-pressure dehydrator (1.6-3MPa) and low-pressure dehydrator (less than or equal to 1.6MPa), can divide into according to the structural style scope: plate and frame filter presses (square or round), belt sludge dewaterers and stacked screw sludge dewaterers.

Circular ultrahigh-pressure hydroextractor belongs to high-pressure hydroextractor, and highest operating pressure is 4-5 Mpa, and circular ultrahigh-pressure hydroextractor's filter screen is non-metallic material, and the filter chamber comprises a plurality of relative airtight rooms, and the similar window screening structure of filter screen, this constitutional equipment's main advantage: the system working pressure is higher, and the sludge dewatering effect is better, and the mud moisture content after the dehydration can reach about 55%, and the major defect has: the filter screen compressive strength is lower, and life is short, and it is higher to change the filter screen cost, and user's use expense is big, and system treatment mud is the discontinuity processing procedure, and its feeding, pressurize, the time of unloading are longer, need be with the help of the air blowback function during the unloading, otherwise the mud cake glues to be assisted on the filter screen in the die cavity, washs the difficulty, and productivity ratio is folded spiral shell machine, belt sludge dewaterer and is hanged down.

In order to solve the above problems, a supercritical high-pressure dehydrator according to an embodiment of the present invention is capable of shortening feeding, pressure maintaining, and discharging time, and a solution of the present invention is described below with reference to the accompanying drawings, where fig. 1 is a schematic structural diagram of a filter screen according to an embodiment of the present invention, fig. 2 is a front view of a supercritical high-pressure dehydrator according to an embodiment of the present invention, fig. 3 is a top view of a supercritical high-pressure dehydrator according to an embodiment of the present invention, fig. 4 is a left view of a supercritical high-pressure dehydrator according to an embodiment of the present invention, and fig. 5 is a sectional view taken along a-a direction in fig. 4.

As shown in fig. 1 to 3, a supercritical high-pressure dehydrator according to an embodiment of the present invention includes: the filter screen comprises a frame 1, a filter screen 5, a first telescopic mechanism 2 and a second telescopic mechanism 6, wherein the filter screen 5 is of a spiral spring-shaped structure, the inside of the spiral spring-shaped structure is used for introducing filter substances, the side wall of the spiral spring-shaped structure is used for filtering liquid, the filter screen 5 is fixed on the frame 1, a gap is reserved between the filter screen 5 and the side wall of the frame 1, the fixed end of the first telescopic mechanism 2 is fixed on the frame 1, the telescopic end faces towards the first opening end of the filter screen 5, the telescopic end of the first telescopic mechanism 2 can extend into the filter screen 5 through the first opening end, the fixed end of the second telescopic mechanism 6 is fixed on the frame 1, the fixed end of the second telescopic mechanism 6 is symmetrically arranged at two sides of the filter screen 5 with the first telescopic mechanism 2, the telescopic end of the second telescopic mechanism 6 can extend into the filter screen 5 through the second opening end of the filter screen 5, the telescopic ends of the first telescopic mechanism 2 and the second telescopic mechanism 6 are respectively fixedly connected with a plugging piece 3, the external diameter of shutoff piece 3 and the internal diameter size cooperation of filter screen 5, in this embodiment, first telescopic machanism 2 and second telescopic machanism 6 are the hydro-cylinder, through hydraulic system and electrical system control.

The invention processes the filter screen into the structure form of the spiral spring made like flat steel, when dewatering, the muddy water is pressurized by the high-pressure ceramic plunger pump and then sent into the dewatering cavity of the dewatering machine through the feeding pipeline, the feeding pipeline has the function of stirring at the same time, the water flows out of the dewatering cavity through the gap of the filter screen to separate the sludge and the water, the dewatering machine provided by the invention can filter the sludge with different sizes by adjusting the spiral pitch of the filter screen, the sludge with smaller size can be filtered by adding little or no chemical reagent, meanwhile, the system working pressure is increased to be not less than 10Mpa, the dewatering requirements of low, medium and high and ultra-critical high pressure can be met, the wall breaking pressure value exceeding the water molecules of the sludge can dewater the sludge with the water content of 98 percent to the water content of 40 to 50 percent, the sludge volume is reduced by more than 90 percent, the service life of the filter screen is long, the replacing times of the filter screen are reduced, the medium-high pressure dehydrator is easy to wash and convenient to replace, the unit dehydration energy consumption of the medium-high pressure dehydrator is greatly reduced, energy is saved, sludge can be treated discontinuously, the production rate is high, the sludge dewatering requirements of all current sewage plants can be met, the sludge in the filter screen can be extruded through the relative motion of the first telescopic mechanism and the second telescopic mechanism after the sludge is treated through the matching of the filter screen and the first telescopic mechanism and the second telescopic mechanism, the sludge in the filter screen can be extruded through the relative motion of the first telescopic mechanism and the second telescopic mechanism after the sludge is formed into sludge cakes, the sludge cakes in the filter screen can drop from the filter screen through the withdrawing of the first telescopic mechanism or the second telescopic mechanism, the other telescopic mechanism can continue to extrude the sludge cakes, the feeding, pressure maintaining and discharging time can be shortened without the help of an air back blowing function, and the manufacturing cost is far lower than that of a round ultrahigh pressure dehydrator.

Optionally, the spiral pitch of the filter screen 5 is 0-1.0 mm.

The filter screen 5 of the invention adopts flat steel with the thickness of 0.4-3.00 mm and the width of 5-20 mm, and is rolled into a cylindrical flat steel spiral spring with the diameter of phi 100-5000 mm and the height of 0-5000 mm, namely: the spiral pitch f is 0-1 mm, D1 is 100-5000 mm, D2 is D1 ten (5-20) mm, the filter screen provided by the invention can bear the working pressure of more than or equal to 10Mpa, exceeds the wall-breaking pressure value of sludge water molecules, can dehydrate the sludge with the water content of 98% to the water content of 40-50%, so that the sludge volume is reduced by more than 90%, the service life of the filter screen is long, the flushing is easy, and the replacement is convenient.

Optionally, the method further includes: the backwashing filter comprises a backwashing pipeline 7, a feeding pipeline 8 and a filtered water discharge pipeline 9, wherein the backwashing pipeline 7 is fixed on a rack 1, the outlet end of the backwashing pipeline 7 is positioned on the filtered water side of the filter screen 1, the filtered water side is one side of water passing through the filter screen 5, the feeding pipeline 8 is fixed on the rack 1, the outlet end of the feeding pipeline 8 is led into the filtered mud side of the filter screen 5, the filtered mud side is one side of mud staying on the filter screen 5, the filtered mud side and the filtered water side are respectively positioned on two sides of the filter screen 5, the filtered water discharge pipeline 9 is fixed on the rack 1, and the inlet end of the filtered water discharge pipeline 9 is arranged at the same side as the backwashing pipeline 7.

Optionally, an adjusting mechanism 11 is connected between the longitudinal end of the filter screen 5 and the frame 1, the adjusting mechanism 11 is used for adjusting the longitudinal length of the filter screen 5, the gap adjustment of the filter screen 5 can be adjusted at any time through the adjusting mechanism 11 due to different sludge components, and the adjusting process is simple and convenient.

Optionally, the filter screen 5 is fixedly connected to the first end of the frame 1 along a longitudinal first end portion thereof, and the adjusting mechanism 11 is connected between the second end portion of the filter screen 5 along the longitudinal direction thereof and the second end of the frame 1.

Optionally, the adjusting mechanism 11 includes an adjusting bolt, the adjusting bolt is screwed with the second end of the rack 1, and the end of the adjusting bolt tightly abuts against the second end of the filter screen 5, in this embodiment, the adjusting bolt is screwed with the second end of the radial filter screen fixing frame 1-1 of the rack, and is adjusted through a single side.

The spiral pitch of the filter screen 5 can be adjusted between 0-1.0 mm through the adjusting mechanism 11, sludge of various sizes can be filtered, meanwhile, when the filter screen 5 is blocked by the sludge, the spiral pitch of the filter screen 5 can be increased through the adjusting mechanism 11, the backwashing pump is started, flushing water flows from the backwashing pipeline 7 to clean the filter screen 5 by utilizing the reverse osmosis principle, and after the cleaning is finished, the filter screen 5 is adjusted through the adjusting mechanism 11 to reset the spiral pitch.

Optionally, there is one screen 5.

Referring to fig. 4-5, the filter screens 5 are multiple, the multiple filter screens 5 are nested together in a concentric circle manner, the multiple filter screens 5 are not contacted with each other, and the cavities formed between two adjacent filter screens 5 are respectively led into the outlet end of a feeding pipeline 8.

The medium-high pressure dehydrator provided by the embodiment of the invention can adopt a structural form of forming concentric circles by adopting a single layer or a plurality of layers of filter screens with different inner diameters, namely, the Russian nesting doll is adopted, the contact area of the muddy water and the filter screen can be increased along with the increase of the number of the filter screens 5, thereby improving the filtering efficiency, as shown in fig. 4-5, which shows the case of 2 filter screens 5, at this time, the filter screens 5 respectively comprise an inner filter screen and an outer filter screen, at this time, the outlet end of the feed pipe 8 is positioned between the inner filter screen and the outer filter screen, the backwash pipe 7 is divided into an outer filter screen backwash pipe and an inner filter screen backwash pipe after entering the frame 1, the outer filter screen backwash pipe is positioned outside the outer filter screen, the inner filter screen backwash pipe is positioned inside the inner filter screen, in this embodiment, the number of the sieves 5 is one or two, and the number of the sieves is more than or equal to three, which greatly increases the cost of the machine.

Optionally, a plugging member 3 is fixedly connected with a top cylinder 4, the outer diameter of the top cylinder 4 is matched with the inner diameter of the filter screen 5 in size, the top cylinder 4 is provided with a plurality of concentric annular chutes along the axial direction, the annular chutes correspond to the filter screens 5 one by one, if the top cylinder is provided with two filter screens 5, the top cylinder 4 is of an annular structure, and the compression space is a space part formed between the two filter screens 5.

Optionally, two ends of the filter screen 5 are respectively provided with a sealing mechanism 10, the sealing mechanisms 10 are fixed on the frame 1, and the sealing mechanisms 10 are in sealing fit with the top cylinder 4 to prevent muddy water from flowing out along the periphery of the first telescopic mechanism 2 or the second telescopic mechanism 6.

The use method and the working principle are as follows:

(1) starting a hydraulic system, respectively sealing two ends of the filter screen by pressurizing pistons at two ends of the filter screen through an electric control system, and reaching a specified position (position control of a travel switch);

(2) after being pressurized by a high-pressure ceramic plunger pump, the sludge with the water content of 98 percent is fed into a dewatering capacity cavity of the dewatering machine through a feeding pipeline 8 of a feeding system of the dewatering machine, under the action of the pressure of the high-pressure ceramic plunger pump, sewage in the dewatering capacity cavity flows out from a filter screen gap, and flows out through a filtered water discharging pipeline 9, so that the sludge is separated from water;

(3) when the rated pressure of the high-pressure ceramic plunger pump is reached, the high-pressure ceramic plunger pump is closed, a hydraulic system is started, two pressurizing pistons perform secondary pressurizing and squeezing from two ends of the filter screen according to a specified program, when the pressure reaches a specified value, after the pressure is maintained for a certain time, one end of the piston is withdrawn, the other end of the piston continues to move forwards, a mud cake is pushed out, and the next cycle is carried out again;

(4) when the filter screen is blocked, the filter screen clearance adjusting mechanism is adjusted by adjusting the adjusting bolts, the filter screen clearance is increased under the elastic action of the flat steel spring, the backwashing pump is started, the filter screen is cleaned by utilizing the reverse osmosis principle, and after the cleaning is finished, the filter screen clearance is returned to the dehydration state of the original dehydrator by adjusting the filter screen clearance adjusting mechanism, so that the dehydration is carried out again.

The above disclosure is only for a few specific embodiments of the present invention, however, the present invention is not limited to the above embodiments, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present invention.