CN104860504B - Dewatering method based on double-body type sewage sludge deep dewatering device - Google Patents

Abstract

The invention discloses a dewatering method based on a double-body type sewage sludge deep dewatering device. According to the dewatering method, sludge which is primarily dewatered and has higher moisture content is sent to a filter-press cavity from a storage bin by a feeding device, two deep dewatering sub-devices are adopted simultaneously, each sub-device can finish deep dewatering of the sludge independently, and the efficiency is doubled than that of a single dewatering device; during secondary deep dewatering, a power transmission mechanism in an extrusion transmission system is extruded to act to drive a push-pull plate, so that a first toggle rod and a second toggle rod are driven to push ahead to act on corresponding extrusion plates; when the sludge is extruded, mutual extrusion is realized by the aid of the mutual action force of the two sub-devices, only smaller force is required from the outside (the power transmission mechanism), the most labor-saving section is realized when the first toggle rod and the second toggle rod are located on the same linear positions, high-pressure filter-press deep dewatering of the sludge can be realized as long as the position of the push-pull plate is kept by external force, and accordingly, the sludge with low moisture content is obtained.

Description

Dewatering based on catamaran type sewage sludge deep dehydrator

Technical field

The present invention relates to sewage sludge process field, specifically one kind are based on catamaran type sewage sludge deep dehydration dress The dewatering put.

Background technology

Mud is the product after sewage disposal, and a large amount of mud producing after current sewage disposal need to process further, takes off Water is the important step of Treatment of Sludge, its objective is to remove most of moisture in mud, so that solids level is enriched with, is greatly decreased Sludge volume, to reduce investment outlay, improves sludge calorific value and energy saving, and the minimizing for mud and subsequently disposal have important Meaning.Dehydration generally can be divided into mechanical dehydration and mummification dehydration, and mummification dehydration is by consuming substantial amounts of heat by the water in mud Divide evaporation thus realizing the deep dehydration of mud, mechanical dehydration is dewatering type most effective, that energy consumption is minimum, currently employed conditioning And mechanical means carry out deep dehydration and moisture content generally can be made to reach 80%-60% to mud.

Mechanical dehydration mode and equipment mainly have belt type filter dehydration, centrifuge dehydration, filter press dehydration three major types, belt Filtering means dehydration passes through flocculation, gravity dehydration, wedge shape dehydration, dehydration technology, high press-dehydrating, and the extruding between band is realized seriality and taken off Water, the filter cake moisture content after dehydration is about in 75%-80%.Centrifuge dehydration is the density contrast biphase using solid-liquid, is revolved by high speed The centrifugal acceleration turning makes solid phase and liquid phase separation, reaches centrifugal sedimentation, using centrifuge dehydration moisture content of the cake typically 80% Left and right.Mud is extruded by filter press dehydration by screw pump, and moisture is by filter cloth, and mud is in sheet frame, squeezing , typically in 1.6mpa, the moisture percentage in sewage sludge of diaphragm plate frame pressure filter dehydration is typically 60% about for pressure.Dehydration equipment also has dish Spiral shell dewaterer, steel belt machine, dish spiral shell dewaterer utilizes the filter space being formed between rotating ring and stationary ring to realize dehydration, but is bad at The dehydration of the mud that grain is big, hardness is big, moisture percentage in sewage sludge is between 75%-80%.

Superelevation compression elasticity squeezer is that a kind of pressure is bigger, filtering equipment in hgher efficiency and solid-liquid separating equipment, entirely Process is broadly divided into the charging -- Four processes such as elasticity squeezing -- connecing liquid -- discharging.It is fed filtration first, by feed pump by thing Material is transported to filter chamber, and the filter pressing by feed pump while charging carries out solid-liquid separation, once filters；Elasticity squeezing, equipment One end fix, the other end by hydraulic jack apply ambient pressure, by elastic force-transmitting device (spring) compress chamber space Squeezed, i.e. twice pressing；Filtrate is discharged, the filter that will be leached in fed filtration and elastic expressing process by mobile liquid dish Liquid is discharged, and is that space is conceded in next step discharging；Automatic pulling plate, automatic pulling plate mechanism passes through the transmission on transmission and drawing device Chain, filter cake Automatic-falling, transported by the transporting equipment of bottom, capital equipment organic frame and control system, filter plate and filter cloth system, Automatic pulling plate mechanism, Jie Ye mechanism., directly from the pressure of hydraulic jack, for directly squeezing, squeeze pressure can for this equipment pressure Reach the 5-7 mpa single batch working cycle for 1.0～1.5h, work efficiency is 3-4 times of diaphragm filter press.The spring of this equipment Need to stand alternate load, and load is very big, the requirement for spring is higher, the pressure of this equipment is larger simultaneously, for dynamic Force system has high demands.

For currently in a large number can be (belt machine, folded by the dehydration equipment of sludge dewatering to moisture content 80% about use Spiral shell machine, centrifuge etc.) for, for these equipment are all substituted for deeply dehydrating sludge or supertension dehydration equipment, throw Enter larger and be a kind of larger waste for the existing equipment being currently in use.So, invention one kind can be joined with these equipment That set uses and then the equipment of realizing secondary deep dewatering is significant, be also simultaneously reality in the urgent need to.

Content of the invention

In view of this, the present invention be directed to moisture percentage in sewage sludge after the process that above-mentioned prior art exists high, high to power demand, The big problem of energy consumption, there is provided a kind of energy consumption is low, realize secondary deep dewatering with reduce further moisture percentage in sewage sludge based on double The dewatering of body formula sewage sludge deep dehydrator.

The technical solution of the present invention is to provide a kind of filling based on catamaran type sewage sludge deep dehydration of following structure The dewatering put, described catamaran type sewage sludge deep dehydrator includes two deep dehydration sub-devices and extruding transmission System, two described deep dehydration sub-devices are symmetrically divided into the both sides of extruding drive system, each deep dehydration sub-device All include cylinder, storage bin, the stripper plate being arranged in cylinder and the base plate being arranged on cylinder body bottom, described stripper plate and bottom Form filter pressing chamber, described storage bin is located above filter pressing chamber and coupled logical between plate；Described base plate is provided with voltage supply The drainage mechanism that in filter chamber, moisture is discharged；Described extruding drive system include power drive mechanism, draw back plate, the first toggle link and Second toggle link, described power drive mechanism is connected to drive draw back plate to move with draw back plate, described the first toggle link and second One end of toggle link is respectively hinged at the both sides of draw back plate, and the other end of the first toggle link and the second toggle link is respectively hinged at and squeezes accordingly On pressing plate；

Described deep dehydrator also includes the helix transporting device for feeding, and described helix transporting device includes First transportation section and the second transportation section, the rotary orientation of the first transportation section and the second transportation section is contrary, and the discharging opening of the two is respectively Corresponding with the storage bin of two deep dehydration sub-devices, the middle upper part of helix transporting device is provided with feed hopper；

Described dewatering comprises the following steps:

1) through the mud after preliminary hydro-extraction, it is respectively fed to by first transportation section and the second transportation section of helix transporting device Corresponding storage bin, opens charging aperture, and is pushed into filter pressing intracavity by storage bin, keep feed inlet and outlet be closed with Prepare for filter pressing；

2) drive the first toggle link and the second toggle link, the first toggle link and the second toggle link deep to two respectively by extruding drive system The stripper plate force of degree dehydration sub-device, starts to carry out filter pressing to mud, is discharged moisture from filter pressing intracavity by drainage mechanism；

3), after dehydration finishes, open feed inlet and outlet, the mud cake of filter pressing intracavity is pushed out.

Using above structures and methods, the present invention compared with prior art, has the advantage that aqueous through preliminary hydro-extraction The higher mud of rate is fed device and sends into filter pressing chamber from storage bin, adopts two deep dehydration sub-devices, every height dress simultaneously Put can complete independently deeply dehydrating sludge, efficiency doubles than single dehydration device；During secondary deep dewatering, extruding transmission Power drive mechanism action in system, drives draw back plate, thus driving the first toggle link and the second toggle link to push ahead, to act on In corresponding stripper plate, during mud is extruded, rely on the interaction force of two sub-devices, to realize mutually Extruding it is only necessary to extraneous (power drive mechanism) less power, when the first toggle link and the second toggle link are in same linear position, Reach the labour-saving stage, as long as external force keeps the position of draw back plate can meet the high pressure filter pressing deep dehydration to mud, from And obtain the low mud of moisture content.

Preferably, described actuating unit includes hydraulic motor, the first gear wheel, the second gear wheel and little gear, institute The hydraulic motor stated all is connected by gear pair with little gear with the first gear wheel, the second gear wheel, described little gear and the One gear wheel is fixedly connected with one heart, and the end of described draw back plate is articulated with the eccentric position of the second gear wheel, forms crank even Linkage.Using this structure, engaged with the first gear wheel by hydraulic motor tooth, form once amplification and the deceleration of power, then lead to Cross little gear and second largest gear forms secondary amplification and the deceleration of power, by being arranged on the push-and-pull of second largest gear eccentricity position Plate, the second bull gear drive is converted into moving along a straight line, then the amplification by draw back plate and the one or two toggle link power, thus real Now only need to less driving source and can achieve the superelevation press filtration to mud.

Preferably, described drainage mechanism includes offering the multiple logical aperture of shunting and liquid flows of supplying water on base plate Road, plate upper surface is wrapped in filter cloth, and described fluid passage one end is connected with drain pipe, and the other end is connected with air inlet pipe, institute The air inlet pipe stated is connected with high-pressure air source.Because filter cloth used after a period of time, mud granule is easily distributed on filter cloth, blocks net Hole, is caused dewatering efficiency to reduce, using air inlet pipe, high-pressure air source is connected with base plate and filter cloth, after certain time, opens Source of the gas and controlled valve, the mud that filter cloth blocks is rinsed well by gases at high pressure, cleans without with water, and cleaning filter cloth is very Convenient.

Preferably, offering charging aperture and discharging opening up and down respectively in cylinder, be provided with described charging aperture into Material flashboard, described discharge outlet is provided with discharging flashboard, and input and output material flashboard is driven by flashboard pusher cylinder, and described flashboard pushes away Cylinder of taking offence is corresponded with input and output material flashboard.Mud enters filter pressing chamber through storage bin from charging aperture, and during filter pressing, input and output material flashboard is equal Close, after filter pressing terminates, open input and output material flashboard, the mud after processing is released from discharging opening.

Preferably, the inner bottom surface of described feed inlet and outlet is contour with the inner bottom surface in filter pressing chamber, and in feed inlet and outlet Corresponding flashboard slot is offered on bottom surface, is provided with spring in described flashboard slot and fills out cover plate, described cover plate fixation of filling out sets Put the upper end in spring.It is to can achieve that flashboard is inserted into flashboard slot using this structure, meanwhile, fill out cover plate when flashboard is opened again permissible Under the action of the spring flashboard slot is closed, prevent mud from entering into next task of impact flashboard in flashboard slot.

Preferably, being provided with mud layer dredging structure on described stripper plate, described mud layer dredging structure extends internally To filter pressing intracavity.After being extruded due to mud, its void ratio diminishes, and easily blocks the circulation of water, causes moisture to be difficult to discharge, especially It is under high pressure filter pressing, the space blocking of mud is even more serious, forms the runner of water in sludge blanket using mud layer dredging structure, easily Discharge in water.

Preferably, described mud layer dredging structure is hollow needle structure, offer multiple through holes thereon, and in mud The surface of layer dredging structure is covered with a metafiltration cloth.The blocking of mud layer dredging structure so can be prevented.

Preferably, the barrel wall at described stripper plate is mobile is cylindrical structural, it is provided with local on cylinder inboard wall top Reducer, the inner-diameter portion of local reducer is more than the internal diameter of cylindrical tube body wall, and this part in local reducer is installed There is the rotary cylinder driving stripper plate rotation.This local reducer another part diameter in a circumferential direction increases, rotary pneumatic Cylinder is arranged on the eccentric throw having a section on the asymmetric line of cylinder from centrage, to provide the power driving stripper plate rotation required Square.

Preferably, described deep dehydrator also includes primary importance sensor and second position sensor, described Primary importance sensor be arranged on the second gear wheel side, to detect the position of rotation of the second gear wheel, described second Put sensor and be arranged at the reducer of local, to detect the position of stripper plate.

Brief description

Fig. 1 is the structural representation of catamaran type sewage sludge deep dehydrator；

As illustrated, 1, cylinder, 2, storage bin, 3, stripper plate, 4, base plate, 5, filter pressing chamber, 6, draw back plate, 7-1, the first elbow Bar, 7-2, the second toggle link, 8, hydraulic motor, the 9, first gear wheel, the 10, second gear wheel, 11, little gear, 12, aperture, 13, liquid Body runner, 14, filter cloth, 15, drain pipe, 16, air inlet pipe, 17, high-pressure air source, 18, charging aperture, 18-1, charging flashboard, 19, go out Material mouth, 19-1, discharging flashboard, 20, flashboard pusher cylinder, 21, flashboard slot, 21-1, spring, 21-2, fill out cover plate, 22, mud layer dredges Logical structure, 23, helix transporting device, 23-1, the first transportation section, 23-2, the second transportation section, 23-3, feed hopper, 24, local becomes Footpath section, 25, rotary cylinder, 26, primary importance sensor, 27, second position sensor.

Specific embodiment

The invention will be further described with specific embodiment below in conjunction with the accompanying drawings.

The present invention covers any replacement made in the spirit and scope of the present invention, modification, equivalent method and scheme.For Make the public that the present invention is had thoroughly to understand, in present invention below preferred embodiment, concrete details is described in detail, and Description without these details can also understand the present invention completely for a person skilled in the art.Additionally, the accompanying drawing of the present invention In for the needs illustrated, be not accurately drawn to scale completely, here is explained.

As shown in figure 1, a kind of dewatering based on catamaran type sewage sludge deep dehydrator of the present invention, described Catamaran type sewage sludge deep dehydrator includes two deep dehydration sub-devices and extruding drive system, described two depth Dehydration sub-device symmetrically be divided into extruding drive system both sides, each deep dehydration sub-device all include cylinder 1, storage bin 2, The stripper plate 3 being arranged in cylinder 1 and the base plate 4 being arranged on cylinder 1 bottom, form pressure between described stripper plate 3 and base plate 4 Filter chamber 5, described storage bin 2 is located above filter pressing chamber 5 and coupled logical；Described base plate 4 is provided with water in voltage supply filter chamber 5 Divide the drainage mechanism discharged；Described extruding drive system includes power drive mechanism, draw back plate 6, the first toggle link 7-1 and second Toggle link 7-2, described power drive mechanism is connected with draw back plate 6 to drive draw back plate 6 to move, described the first toggle link 7-1 and One end of second toggle link 7-2 is respectively hinged at the both sides of draw back plate 6, and the other end of the first toggle link 7-1 and the second toggle link 7-2 is respectively It is hinged on corresponding stripper plate 3；

Described deep dehydrator also includes the helix transporting device 23 for feeding, described helix transporting device bag Include the first transportation section 23-1 and the second transportation section 23-2, the rotary orientation phase of the first transportation section 23-1 and the second transportation section 23-2 Instead, the discharging opening of the two is corresponding with the storage bin 2 of two deep dehydration sub-devices respectively, on the centre of helix transporting device 23 Side is provided with feed hopper 23-3；

Described dewatering comprises the following steps:

1) through the mud after preliminary hydro-extraction, it is respectively fed to by first transportation section and the second transportation section of helix transporting device Corresponding storage bin, opens charging aperture, and is pushed into filter pressing intracavity by storage bin, keep feed inlet and outlet be closed with Prepare for filter pressing；

2) drive the first toggle link and the second toggle link, the first toggle link and the second toggle link deep to two respectively by extruding drive system The stripper plate force of degree dehydration sub-device, starts to carry out filter pressing to mud, is discharged moisture from filter pressing intracavity by drainage mechanism；

3), after dehydration finishes, open feed inlet and outlet, the mud cake of filter pressing intracavity is pushed out.

Described actuating unit includes hydraulic motor 8, the first gear wheel 9, the second gear wheel 10 and little gear 11, described Hydraulic motor 8 is all connected by gear pair with little gear 11 with the first gear wheel 9, the second gear wheel 10, described little gear 11 Concentric with the first gear wheel 9 be fixedly connected, the end of described draw back plate 6 is articulated with the eccentric position of the second gear wheel, is formed Toggle.

For the design of draw back plate, set square structure, especially isoceles triangle plate, the first toggle link 7-1 and can be adopted Two toggle link 7-2 are hinged respectively at two summits on isoceles triangle plate base, and another one summit is hinged on the inclined of the second gear wheel Heart position.Certainly, this be only a more preferred example however it is not limited to this example, for example, it is also possible to pass through other connecting rods Mechanism.

Described drainage mechanism includes offering multiple the supply water logical aperture 12 of shunting and flow channel for liquids 13 on base plate 4, Base plate 4 upper surface is wrapped in filter cloth 14, and described fluid passage 13 one end is connected with drain pipe 15, the other end and air inlet pipe 16 phase Even, described air inlet pipe 16 is connected with high-pressure air source 17.Because filter cloth used after a period of time, mud granule is easily distributed in filter cloth On, block mesh, cause dewatering efficiency to reduce, using air inlet pipe, high-pressure air source is connected with base plate and filter cloth, using a timing Between after, open source of the gas and controlled valve, the mud that filter cloth blocks is rinsed well by gases at high pressure.

Offer charging aperture 18 and discharging opening 19 up and down respectively in cylinder 1, at described charging aperture 18, be provided with charging Flashboard 18-1, is provided with discharging flashboard 19-1 at described discharging opening 19, input and output material flashboard is driven by flashboard pusher cylinder 20, institute The flashboard pusher cylinder 20 stated and input and output material flashboard correspond.Described input and output material flashboard lower end can arrange the sealing material such as rubber Material.

The inner bottom surface of described feed inlet and outlet is contour with the inner bottom surface in filter pressing chamber 5, and opens on the inner bottom surface of feed inlet and outlet It is provided with corresponding flashboard slot 21, be provided with spring 21-1 in described flashboard slot 21 and fill out cover plate 21-2, described fills out cover plate 21- 2 upper ends being fixedly installed on spring 21-1.

It should be noted that the term such as heretofore described " base plate ", " inner bottom surface ", both with respect to stripper plate extruding For direction, specifically in figure, the base plate of two deep dehydration sub-devices is with the position of in figure as left side with right side.

Mud layer dredging structure 22 is provided with described stripper plate 3, described mud layer dredging structure 22 extends inwardly to pressure In filter chamber 5.The development length of mud layer dredging structure 22 is adjustable, for example with adjustable diameter and screw adjusting.

Described mud layer dredging structure 22 is hollow needle structure, offers multiple through holes thereon, and in mud layer dredging The surface of structure is covered with a metafiltration cloth.Mud layer dredging structure 22, in addition to using said structure, can adopt pin, open up thereon There is groove, its end is pointed, other parts are cylindric or rectangular-shaped.

Barrel wall at described stripper plate 3 is mobile is cylindrical structural, is provided with local reducer in cylinder 1 upper inside wall 24, the inner-diameter portion of local reducer 24 is more than the internal diameter of cylindrical tube body wall, and this part in local reducer 24 is installed There is the rotary cylinder 25 driving stripper plate 3 rotation.This local reducer another part diameter in a circumferential direction increases, rotation Cylinder is arranged on the eccentric throw having a section on the asymmetric line of cylinder from centrage, is driven needed for stripper plate rotation with providing Moment.

Described deep dehydrator also includes primary importance sensor 26 and second position sensor 27, and described first Position sensor 26 is arranged on the second gear wheel 10 side, to detect the position of rotation of the second gear wheel 10, described second Put sensor 27 and be arranged at local reducer 24, to detect the position of stripper plate 3.

In step 2) after, with the carrying out of compression, the now void ratio of mud very little, the passage quilt of moisture circulation Sludge blockage, is difficult to discharge through filter cloth, and under the reverse drive of extruding drive system, the local that stripper plate returns to cylinder becomes Footpath Duan Chu, second position sensor detects stripper plate, and controller is signaled to stripper plate rotary cylinder, and cylinder is to stripper plate One turning moment, stripper plate rotates an angle；Hydraulic motor rotates forward again, drives stripper plate again to filter pressing Mud carry out secondary extrusion, when stripper plate is pushed to extreme position, now the enlarge-effect of power is maximum, carries out pressurize, right Mud continue the supertension filter pressing regular hour, until do not have moisture out till.

For the cleaning of drainage mechanism, moisture, after discharging tube discharge, is closed the valve on drain pipe, is opened air inlet pipe valve Door, connects high-pressure air source, the mud granule of aperture clogs on filter cloth and bottom plate is rinsed.

Concrete operating principle is as follows:

Enter into through the mud of preliminary hydro-extraction moisture content higher (80% about) and helical feed is entered into by feed hopper In device, under auger conveyor conveying, left and right two mud enters into the discharging bin of two deep dehydration sub-devices with equal equivalent Interior, after accumulation after a while, flashboard cylinder operation is opened feeding flashboard, and discharging flashboard cuts out, and mud is made in gravity With under enter into filter pressing chamber, after the mud in storage bin is all introduced into filter pressing chamber, charging flashboard close.Hydraulic motor starts Work, hydraulic motor is driven forward the first gear wheel, little gear, the second gear wheel, set square (one kind of draw back plate), toggle link (including the first toggle link and the second toggle link), transmit the force on stripper plate, in the incipient stage of compression, due to the void ratio of mud Larger, the power required for compression is also less, but compression speed is very fast, and now the drive system of power mainly plays crushing failure at high speed Effect, extruding force is less.With the carrying out of extruding, it is more and more real that mud is compressed, and void ratio diminishes, now required Compression stress is increasing, and compression displacement is less and less, and set square and toggle link are in the amplification position of a power, the enlarge-effect of power Start to manifest it is only necessary to the certain power of hydraulic motor, through the two-stage engagement of big little gear and set square, toggle link power multiple Under amplification, form huge extruding force at stripper plate and filter pressing is carried out to mud.When being compressed to rear half stage, the now hole of mud Than very little, the passage of moisture circulation, by sludge blockage, is difficult to discharge through filter cloth, hydraulic motor is inverted, in size gap Gear, set square, under the driving of toggle link, stripper plate returns at the local reducer of cylinder, and second position sensor detects Stripper plate, controller is signaled to stripper plate rotary cylinder, and cylinder rotates one to one turning moment of stripper plate, stripper plate After angle, hydraulic motor rotates forward, and again drives stripper plate to carry out secondary extrusion to the mud of filter pressing again, now, " duck eye " that pin when extruding for the first time is formed is supplied to water of compaction circulation passage, and water of compaction easily passes through this passage through filter Cloth, aperture enter flow channel for liquids, and this stage is the packing stage of power, and now right toggle link, set square, left toggle link are in " stretching " shape Under state, the enlarge-effect of extruding force drive system power is maximum, and the pressure suffered by mud is also maximum, carries out pressurize certain time, Moisture in mud is constantly extruded, till not having moisture extrusion, filter pressing stops.Discharging flashboard is opened, and mud is in gravity In the presence of discharge filter pressing chamber.The moisture being press-filtered out enters into fluid passage by the aperture on filter cloth, fixing base plate, unidirectional Under valve action, this liquid can only be from the unidirectional discharge of discharging tube.After running after a while, such as mud granule is by the mesh of filter cloth Or the aperture clogs of fixed plate, now open high-pressure air source and the controlled valve of air inlet pipe is opened, the switch valve at drain pipe Door is closed, and the mud granule blocking on filter cloth and on bottom plate aperture is rinsed well by gases at high pressure.

Below only preferred embodiments of the present invention are described, but are not to be construed as limiting the scope of the invention.This Invention is not only limited to above example, and its concrete structure allows to change.In a word, all guarantors in independent claims of the present invention The various change made in the range of shield is all within the scope of the present invention.

Claims (9)

1. a kind of dewatering based on catamaran type sewage sludge deep dehydrator, described catamaran type sewage sludge depth takes off Water installations include two deep dehydration sub-devices and extruding drive system it is characterised in that: described two deep dehydrations dress Put the both sides being symmetrically divided into extruding drive system, each deep dehydration sub-device all includes cylinder (1), storage bin (2), setting Stripper plate (3) in cylinder (1) and the base plate (4) being arranged on cylinder (1) bottom, described stripper plate (3) and base plate (4) it Between form filter pressing chamber (5), described storage bin (2) is located above filter pressing chamber (5) and coupled logical；On described base plate (4) It is provided with the drainage mechanism of voltage supply filter chamber (5) interior moisture discharge；Described extruding drive system includes power drive mechanism, draw back plate (6), the first toggle link (7-1) and the second toggle link (7-2), described power drive mechanism is connected with draw back plate (6) to drive push-and-pull Plate (6) moves, and one end of described the first toggle link (7-1) and the second toggle link (7-2) is respectively hinged at the both sides of draw back plate (6), The other end of the first toggle link (7-1) and the second toggle link (7-2) is respectively hinged on corresponding stripper plate (3)；

Described deep dehydrator also includes the helix transporting device (23) for feeding, and described helix transporting device includes First transportation section (23-1) and the second transportation section (23-2), the spiral rotation of the first transportation section (23-1) and the second transportation section (23-2) To contrary, the discharging opening of the two is corresponding with the storage bin (2) of two deep dehydration sub-devices respectively, in helix transporting device (23) Middle upper part be provided with feed hopper (23-3)；

Described dewatering comprises the following steps:

1) through the mud after preliminary hydro-extraction, it is respectively fed to therewith by first transportation section and the second transportation section of helix transporting device Corresponding storage bin, opens charging aperture, and is pushed into filter pressing intracavity by storage bin, keeps feed inlet and outlet to be closed thinking pressure Filter is prepared；

2) the first toggle link and the second toggle link, the first toggle link and the second toggle link is driven to take off to two depth respectively by extruding drive system The stripper plate force of water sub-device, starts to carry out filter pressing to mud, is discharged moisture from filter pressing intracavity by drainage mechanism；

3), after dehydration finishes, open feed inlet and outlet, the mud cake of filter pressing intracavity is pushed out.

2. the dewatering based on catamaran type sewage sludge deep dehydrator according to claim 1 it is characterised in that: Described drainage mechanism includes offering multiple the supply water logical aperture (12) of shunting and flow channel for liquids (13), bottom on base plate (4) Plate (4) upper surface is wrapped in filter cloth (14), and described flow channel for liquids (13) one end is connected with drain pipe (15), the other end and air inlet Pipe (16) is connected, and described air inlet pipe (16) is connected with high-pressure air source (17).

3. the dewatering based on catamaran type sewage sludge deep dehydrator according to claim 2 it is characterised in that: Described power drive mechanism includes hydraulic motor (8), the first gear wheel (9), the second gear wheel (10) and little gear (11), institute The hydraulic motor (8) stated all is connected by gear pair with little gear (11) with the first gear wheel (9), the second gear wheel (10), institute The little gear (11) stated is concentric with the first gear wheel (9) to be fixedly connected, and the end of described draw back plate (6) is articulated with the second canine tooth The eccentric position of wheel, forms toggle.

4. the dewatering based on catamaran type sewage sludge deep dehydrator according to claim 1 it is characterised in that: Offer charging aperture (18) and discharging opening (19) in cylinder (1) up and down respectively, described charging aperture (18) place is provided with charging Flashboard (18-1), described discharging opening (19) place is provided with discharging flashboard (19-1), and input and output material flashboard is by flashboard pusher cylinder (20) drive, described flashboard pusher cylinder (20) is corresponded with input and output material flashboard.

5. the dewatering based on catamaran type sewage sludge deep dehydrator according to claim 4 it is characterised in that: The inner bottom surface of described feed inlet and outlet is contour with the inner bottom surface of filter pressing chamber (5), and offers phase on the inner bottom surface of feed inlet and outlet The flashboard slot (21) answered, is provided with spring (21-1) and fills out cover plate (21-2), described fills out cover plate in described flashboard slot (21) (21-2) it is fixedly installed on the upper end of spring (21-1).

6. the dewatering based on catamaran type sewage sludge deep dehydrator according to claim 2 it is characterised in that: Mud layer dredging structure (22) is provided with described stripper plate (3), described mud layer dredging structure (22) extends inwardly to filter pressing In chamber (5).

7. the dewatering based on catamaran type sewage sludge deep dehydrator according to claim 6 it is characterised in that: Described mud layer dredging structure (22) is hollow needle structure, offers multiple through holes thereon, and in mud layer dredging structure Surface is covered with a metafiltration cloth.

8. the dewatering based on catamaran type sewage sludge deep dehydrator according to claim 3 it is characterised in that: Barrel wall at described stripper plate (3) is mobile is cylindrical structural, is provided with local reducer (24) in cylinder (1) upper inside wall, The inner-diameter portion of local reducer (24) is more than the internal diameter of cylindrical tube body wall, and this part in local reducer (24) is installed There is the rotary cylinder (25) that drive stripper plate (3) rotates.

9. the dewatering based on catamaran type sewage sludge deep dehydrator according to claim 8 it is characterised in that: Described deep dehydrator also includes primary importance sensor (26) and second position sensor (27), described primary importance Sensor (26) is arranged on the second gear wheel (10) side, to detect the position of rotation of the second gear wheel (10), described second Position sensor (27) is arranged on local reducer (24) place, to detect the position of stripper plate (3).