CN113290907A - Extrusion device - Google Patents

Abstract

The invention discloses an extrusion device, which comprises an extrusion mechanism and a backpressure mechanism, wherein the extrusion mechanism is used for pushing biogas residues to an extrusion side, a slurry outlet is arranged below a screen part of the extrusion mechanism, the backpressure mechanism discharges materials according to a preset backpressure value, the biogas residues are pushed to the extrusion side through the extrusion mechanism in the discharging process, the moisture of the biogas residues is fully extruded on the extrusion side under the blocking of the backpressure mechanism, the stress balance of a backpressure piece is controlled by controlling the size of the pressure value of the backpressure part, when the extrusion force is greater than the backpressure force, the driving force of the backpressure part is not enough to maintain the backpressure piece in a blocking state, the biogas residues blocked by the backpressure piece flush through the backpressure piece and are conveyed to a discharge port, the extrusion of the biogas residues according to the preset water content requirement is realized, the water content of the biogas residues is controlled to be maintained at a certain value, and the water content stably meets the production requirement.

Description

Extrusion device

Technical Field

The invention relates to the field of fertilizer production, in particular to an extrusion device.

Background

In the production process of the fertilizer, organic substances are fermented to obtain biogas residues, and partial water in the biogas residues is extruded according to the water content required by a factory. However, in the existing fertilizer production process, the existing extrusion device is difficult to well control the water content of the extruded biogas residues to be in a stable level, so that the water content of the biogas residues is suddenly high and suddenly low, and enterprise production is influenced.

Disclosure of Invention

To solve the problems of the prior art, an object of the present invention is to provide an extrusion apparatus.

In order to achieve the above object, an embodiment of the present invention provides an extrusion apparatus including:

the slurry outlet is arranged on the lower part of the slurry outlet, and a slurry outlet is arranged on the upper part of the slurry outlet;

the extruding mechanism comprises an extruding body and a screen part surrounding the extruding body, the extruding body is used for conveying materials along the discharging channel, a feeding side communicated with the feeding hole and an extruding side communicated with the discharging hole are sequentially formed along the discharging direction of the discharging channel, and the pulp outlet is arranged below the screen part;

the backpressure mechanism comprises a blocking part and a backpressure part, the blocking part comprises a backpressure piece, the backpressure piece comprises a blocking state and a releasing state, and the backpressure part drives the backpressure piece to be switched to the blocking state in the releasing state according to a preset pressure value;

in the blocking state, the back pressure element closes a discharge channel between the extrusion side and the discharge hole;

in the release state, the back pressure element is far away from the discharge passage, and the extrusion side is communicated with the discharge hole.

As a further improvement of the invention, the discharge channel is arranged in an annular shape, the back pressure mechanism comprises a plurality of blocking parts arranged in a circumferential array around the discharge channel, and each blocking part independently closes the discharge channel.

As a further improvement of the present invention, the extrusion body includes a drum, and a screw flights surrounding the drum, the screw flights extending from the feed side to the extrusion side, the drum extending from the feed side to the discharge port, and a plurality of the dam portions are circumferentially disposed around the drum.

As a further development of the invention, the screen section is provided with a conical shape, the area of the cross-section of the screen section at the feed side being larger than the area of the cross-section of the screen section at the press side.

As a further improvement of the present invention, the back pressure mechanism further includes a support member, the blocking portion further includes a trigger member abutting against the back pressure portion, and a rotating shaft rotatably connected to the support member, the trigger member and the back pressure member are connected to both sides of the rotating shaft, and when the back pressure member is switched between the blocking state and the releasing state, the movement direction of the trigger member is opposite to that of the back pressure member.

As a further improvement of the present invention, the trigger includes a connecting member connected to the rotating shaft, and a rolling member rotatably connected to the connecting member, and the back pressure portion abuts against a rolling surface of the rolling member.

As a further improvement of the present invention, the back pressure portion includes a holding member that holds the trigger member, and a holding body that drives the holding member to move toward the trigger member;

when the force applied to the abutting piece by the abutting body is greater than the force applied to the abutting piece by the trigger piece, the abutting piece moves towards the trigger piece; on the contrary, when the force applied to the abutting piece by the abutting body is smaller than the force applied to the abutting piece by the trigger piece, the abutting piece moves towards the abutting body.

As a further improvement of the present invention, the back pressure mechanism includes a plurality of back pressure portions, the plurality of abutting members are combined into a ring member, the plurality of abutting bodies synchronously abut against the ring member, and the ring member abuts against the trigger member.

As a further improvement of the present invention, the screen part includes a stationary screen and a moving screen which are sleeved with each other, the moving screen reciprocates along the discharging direction of the discharging channel, and when the moving screen moves, the stationary screen always covers one end of the moving screen far away from the discharging port, or one end of the moving screen far away from the discharging port always covers the stationary screen.

As a further improvement of the invention, one end of the moving screen facing the discharge hole is fixedly connected with the backpressure mechanism;

the side of the movable screen is provided with a support rod parallel to the discharging direction, and the extrusion mechanism further comprises a support barrel sleeved on the support rod, a support member connected with the movable screen and the support barrel, and a driving member used for driving the movable screen to move.

Compared with the prior art, the invention has the following beneficial effects: in the discharging process of the extruding device, the biogas residues are pushed to the extruding side by the extruding mechanism, and the moisture of the biogas residues is fully extruded at the extruding side under the blocking of the back pressure mechanism; through the size of the pressure value of control back-pressure portion, the force balance of control back-pressure component, when the extruded power was greater than the pressure value, the drive power of back-pressure portion was not enough to maintain the back-pressure component and is in the state of blockking, and the marsh slag that is blockked by the back-pressure component rushes through the back-pressure component promptly, transports the discharge gate, has realized extrudeing its requirement according to predetermined water content to the water content of control marsh slag maintains a definite value, and the water content stably accords with the production requirement.

Drawings

FIG. 1 is a schematic structural view of an extrusion apparatus according to an embodiment of the present invention;

FIG. 2 is a schematic structural view of a back pressure mechanism portion of an embodiment of the present invention;

FIG. 3 is a schematic diagram of a back pressure mechanism along the discharge direction according to an embodiment of the present invention;

FIG. 4 is an enlarged view of a portion of FIG. 3 at A;

10, a back pressure mechanism; 11. a blocking portion; 111. a back pressure element; 112. a rotating shaft; 113. a trigger; 1131. a connecting member; 1132. a rolling member; 12. a back pressure part; 121. a support body; 122. a holding member; 21. a drum; 211. a squeegee; 22. a screen section; 221. moving the screen; 222. a stationary screen; 23. a spiral pusher plate; 24. a support bar; 25. a support cylinder; 26. a support member; 27. a drive member; 1. a feed inlet; 2. a discharge port; 3. a pulp outlet; 4. a feeding side; 5. extruding the side; 6. a discharge channel; 7. a blanking device; 81. a motor; 82. and a speed reducer.

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. These embodiments are not intended to limit the present invention, and structural, methodological, or functional changes made by those skilled in the art according to these embodiments are included in the scope of the present invention.

It will be understood that terms used herein such as "upper," "above," "lower," "below," and the like, refer to relative positions in space and are used for convenience in description to describe one element or feature's relationship to another element or feature as illustrated in the figures. The spatially relative positional terms may be intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures.

An embodiment of the invention provides an extrusion device, which is used for extruding at least part of water in biogas residues to obtain biogas residues with water content meeting preset requirements.

The extrusion device of the embodiment comprises a feed inlet 1, a slurry outlet 3, a discharge outlet 2 and an extrusion mechanism, as shown in fig. 1, a discharge channel 6 is formed between the feed inlet 1 and the discharge outlet 2, the extrusion mechanism comprises an extrusion body and a screen part 22 annularly extruding the extrusion body, the extrusion body is used for conveying materials along the discharge channel 6, a feed side 4 communicated with the feed inlet 1 and an extrusion side 5 communicated with the discharge outlet 2 are sequentially formed along the discharge direction of the discharge channel 6, and the slurry outlet 3 is arranged below the screen part 22;

the screen part 22 is a member having a plurality of meshes and is used to separate water in the sludge, and the sludge is sufficiently squeezed and dehydrated in the area of the squeezing side 5 after being pushed to the area by the squeezing body.

To clearly express the position and direction described in the present embodiment, the biogas residue is defined to enter from the left feeding side 4 and move to the right extrusion side 5 along the discharging direction, and the biogas residue is defined to fall up and down by referring to the gravity direction, that is, the biogas residue falls down under the gravity, and the water extruded through the screen part 22 also falls down, and the slurry outlet 3 is disposed below the screen part 22.

The extrusion device further comprises a backpressure mechanism 10, as shown in fig. 2, the backpressure mechanism comprises a blocking part 11 and a backpressure part 12, the blocking part 11 comprises a backpressure element 111, the backpressure element 111 comprises a blocking state and a releasing state, and the backpressure part 12 drives the backpressure element 111 to be switched to the blocking state from the releasing state according to a preset pressure value;

in the blocking state, the back pressure element 111 closes the outlet channel 6 between the pressure side 5 and the outlet 2;

in the released state, the back-pressure element 111 is away from the outlet channel 6 and the pressure side 5 communicates with the outlet 2.

It will be understood that when the biogas residue is under a certain pressure, it is impossible to squeeze out water, and at this time, water is not discharged until the pressure is increased any more, and no more water is discharged, so that the pressure value is controlled. The corresponding water outlet amount can be controlled.

The back pressure part 12 controls the maximum supporting force of the back pressure part 12 by controlling the pressure value of the gas input into the inflation spring, or the back pressure value applied to the back pressure part 12 is realized by adjusting the gas pressure adjusting valve, and the pressure adjusted by the gas pressure adjusting valve is the inner gas pressure of the back pressure part 12, so that the preset pressure value is adjusted quantitatively. When the external force is less than the pressure value, the back pressure element 111 always blocks the biogas residue from passing through. Through the size of setting for suitable pressure value of predetermineeing according to the ejection of compact sediment water content requirement of difference, the water content of better control ejection of compact natural pond sediment, pneumatic control maintenance cost is low in addition, maintains simply, has bad back direct change, has improved work efficiency greatly, has reduced the working strength that workman maintained equipment, has also reduced the possibility that the accident takes place.

Further, the discharge channel 6 is annular, as shown in fig. 2 or 3, the back pressure mechanism 10 includes a plurality of blocking portions 11 arranged in a circumferential array around the discharge channel 6, each blocking portion 11 independently seals the discharge channel 6, that is, the force of the biogas residue at different positions on the annular surface to press the back pressure mechanism 10 is different, and at a place where the individual pressure is too high, the back pressure member 111 at that position can be flushed, without affecting the back pressure members 111 at other positions to seal the discharge channel 6, while the biogas residue flushed due to too high pressure can be considered that the moisture is fully squeezed out, and the moisture is not squeezed out, so that the back pressure member 111 regulated at the preset pressure value can not be flushed out.

As shown in fig. 1, the extrusion body comprises a roller 21 and a spiral material pushing plate 23 surrounding the roller 21, the spiral material pushing plate 23 extends from the feeding side 4 to the extrusion side 5, the roller 21 extends from the feeding side 4 to the discharging port 2, a plurality of blocking parts 11 are circumferentially arranged around the roller 21, and in the rotating process of the spiral material pushing plate 23, feeding is realized, and biogas residues are continuously fed to the extrusion side 5.

Further, the screen section 22 is provided with a conical shape, the area of the cross-section of the screen section 22 at the feed side 4 being larger than the area of the cross-section of the screen section 22 at the press side 5, i.e. the cross-section of the screen section 22 on the left side is larger than the cross-section on the right side. The more the direction is close to the discharge port 2, the smaller the cross-sectional area is, so that the larger pressure is borne, the more the position is close to the discharge port 2, the more the water is extruded out, and in addition, new biogas residues on the left side are continuously fed, the resistance of rightward transportation of the biogas residues on the right side is increased, and the pulp is more easily discharged under the condition that the left side continuously supplies new pressure.

Further, the back pressure mechanism 10 further includes a support member 26, the blocking portion 11 further includes a trigger 113 abutting against the back pressure portion 12, and a rotating shaft 112 rotatably connected to the support member 26, the trigger 113 and the back pressure member 111 are connected to both sides of the rotating shaft 112, when the back pressure member 111 is switched between the blocking state and the releasing state, a moving direction of the trigger 113 is opposite to the back pressure member 111, the rotating shaft 112 corresponds to a fulcrum about which the trigger 113 and the back pressure member 111 rotate, the back pressure member 111 may be provided in a plate shape, an included angle between the back pressure member 111 and the trigger 113 is smaller than 180 ° on a side away from the rotating shaft 112, as shown in fig. 2, so that the trigger 113 moves rightward when the back pressure member 111 moves leftward; when the back pressure member 111 moves to the right, the trigger member 113 moves to the left. In addition, the distance between the back pressure member 111 and the trigger 113 and the rotating shaft 112 can be controlled to adjust the magnitude of the torque, so that the magnitude of the back pressure and the force of the biogas residues against the back pressure member 111 are controlled in inverse proportion to the distance, and the pressure of the biogas residues on the back pressure member 111 is adjusted by selecting smaller back pressure.

As shown in fig. 2 to 4, the triggering member 113 includes a connecting member 1131 connected to the rotating shaft 112 and a rolling member 1132 rotatably connected to the connecting member 1131, and the back pressure portion 12 abuts against a rolling surface of the rolling member 1132, so that a degree of freedom can be increased, and the back pressure portion 12 pushes the triggering member 113 more smoothly without being jammed inside to increase or reduce the back pressure of the back pressure portion 12.

In addition, the back pressure portion 12 includes a holding member 122 for holding the trigger 113, and a holding body 121 for driving the holding member 122 to move toward the trigger 113;

when the force applied to the holding member 122 by the holding body 121 is greater than the force applied to the holding member 122 by the trigger 113, the holding member 122 moves toward the trigger 113; on the contrary, when the force applied to the holding member 122 by the holding body 121 is smaller than the force applied to the holding member 122 by the trigger 113, the holding member 122 moves toward the holding body 121.

The holding body 121 may be configured as an inflation spring, and the more the inflation, the higher the pressure. The water yield of the biogas residues is controlled by balancing the back pressure of the inflation spring and the force fed back by the biogas residues through the back pressure element 111.

The back pressure mechanism 10 includes a plurality of back pressure portions 12, a plurality of abutting members 122 are combined into a ring member, a plurality of abutting bodies 121 synchronously abut against the ring member, the ring member abuts against the trigger member 113, and a plurality of uniformly distributed gas-filled springs simultaneously abut against the abutting members 122, so that biogas residues at various positions in the annular direction are more uniformly pressed, and the ring member can be a whole ring formed during production.

The abutting bodies 121 can be provided in plurality, the blocking parts 11 can also be provided in plurality, the number of the abutting bodies 121 and the blocking parts 11 does not need to be equal, the annular parts formed by the abutting pieces 122 are arranged between the abutting bodies 121, when the number of the abutting bodies 121 is larger, the individual abutting bodies 121 can be prevented from failing, each abutting body 121 cannot bear excessive force, and the service life is prolonged. When the number of the blocking parts 11 is more, the pressure at each position can be controlled more accurately, the annular part is arranged between the blocking part 11 and the abutting body 121, the stress of the whole annular part can be ensured to be uniform, and the pressure of the biogas residues at individual positions can be overlarge along the position of one circle of the roller 21, so that the blocking part 11 at the position can separately judge the whole back pressure given by the annular part to be compared with the pressure of the biogas residues at the position, and the water content of the whole discharged material is improved to be within a preset range.

Further, the back pressure mechanism 10 can move along with the moving screen 221, as shown in fig. 3, so that the space length of the discharged slag can be adjusted, and the pressing device can adapt to various pressing stroke ranges. The screen part 22 includes a stationary screen 222 and a moving screen 221 which are fitted to each other, the moving screen 221 reciprocates in the discharge direction of the discharge passage 6, and when the moving screen 221 moves, the stationary screen 222 always covers the end of the moving screen 221 which is away from the discharge port 2, or the end of the moving screen 221 which is away from the discharge port 2 always covers the stationary screen 222, so that the sludge does not fall between the stationary screen 222 and the moving screen 221.

The back pressure mechanism 10 is fixedly connected to one end of the movable screen 221 facing the discharge port 2, and a baffle is provided at a position where the movable screen 221 is connected to the back pressure mechanism 10 to prevent the extruded water from flowing to one side of the back pressure member 111 in the discharge direction.

The side of the movable screen 221 is provided with a support rod 24 parallel to the discharging direction, the extruding mechanism further comprises a support cylinder 25 sleeved on the support rod 24, a support member 26 connected with the movable screen 221 and the support cylinder 25, and a driving member 27 for driving the movable screen 221 to move, the support rod 24 is in a smooth cylindrical shape, the support cylinder 25 can slide left and right along the support rod 24, and plays a role in assisting sliding and supporting the movable screen 221, the driving member 27 can be set to be a hydraulic oil cylinder, an air cylinder and the like, the driving member 27 pushes the movable screen 221 to move, and when the movable screen 221 moves, the movable screen 221 moves together with the backpressure mechanism 10.

The movement process generally comprises the following stages:

the original biogas residues enter the feeding side 4 of the abutting body 121 from the feeding port 1, the original materials are conveyed along the discharging direction of the discharging channel 6 under the pushing of the rotary spiral material pushing plate 23, the biogas residues sequentially pass through the fixed screen and the movable screen 221 in the conveying process, part of liquid drops to the lower slurry outlet 3 through the screen part 22 until the biogas residues move to the extrusion side 5, and the biogas residues stop moving forward under the limitation of the back pressure piece 111 of the back pressure mechanism 10;

the back pressure element 111 cannot easily release biogas residues under the preset pressure of the back pressure part 12, and is square only when the extrusion force of the biogas residues at the position is too large, so that new biogas residues transmitted from the left side at the extrusion side 5 are continuously accumulated, the more the biogas residues are accumulated in the accumulation length range of the extrusion side 5, and the material resistance is increased under the compression of the preset pressure value of the back pressure mechanism 10 at the right side, so that the friction extrusion between the biogas residues and the screen mesh part 22 is increased, and the biogas residues are more and more adequately desized;

slurry after the biogas residues are desized is discharged from the slurry outlet 3, the more the biogas residues after water is extruded are accumulated at the backpressure mechanism 10, the force exerted on the backpressure element 111 finally exceeds the prefabricated backpressure value of the backpressure mechanism 10, the backpressure element 111 is flushed, and finally the biogas residues reach the position of the blanking device 7, and the blanking device 7 is connected with a slag tank to finish the whole extrusion process. The driving part of the pressing means includes a motor 81 and a decelerator 82, the motor 81 providing a driving force, and the decelerator 82 being connected to the drum 21.

Compared with the prior art, the embodiment has the following beneficial effects:

in the discharging process of the extruding device, biogas residues are pushed to the extruding side 5 through the extruding mechanism, under the blocking of the backpressure mechanism 10, moisture of the biogas residues is fully extruded at the extruding side 5, the stress balance of the backpressure member 111 is controlled by controlling the size of the pressure value of the backpressure member 12, when the extruding force is greater than the pressure value, the driving force of the backpressure member 12 is not enough to maintain the backpressure member 111 in a blocking state, the biogas residues blocked by the backpressure member 111 flush through the backpressure member 111 and are transported to the discharging port 2, the extrusion according to the requirement of the preset moisture content is realized, so that the moisture content of the biogas residues is controlled to be maintained at a certain value, and the moisture content stably meets the production requirement.

It should be understood that although the present description refers to embodiments, not every embodiment contains only a single technical solution, and such description is for clarity only, and those skilled in the art should make the description as a whole, and the technical solutions in the embodiments can also be combined appropriately to form other embodiments understood by those skilled in the art.

The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims (10)

1. An extrusion apparatus, comprising:

a feeding hole (1), a pulp outlet (3) and a discharging hole (2), wherein a discharging channel (6) is formed between the feeding hole (1) and the discharging hole (2);

the extruding mechanism comprises an extruding body and a screen part (22) surrounding the extruding body, the extruding body is used for conveying materials along the discharging channel (6), a feeding side (4) communicated with the feeding hole (1) and an extruding side (5) communicated with the discharging hole (2) are sequentially formed along the discharging direction of the discharging channel (6), and the pulp outlet (3) is arranged below the screen part (22);

the backpressure mechanism (10) comprises a blocking part (11) and a backpressure part (12), the blocking part (11) comprises a backpressure element (111), the backpressure element (111) comprises a blocking state and a releasing state, and the backpressure part (12) drives the backpressure element (111) to be switched to the blocking state in the releasing state according to a preset pressure value;

in the blocked state, the back pressure element (111) closes a discharge channel (6) between the extrusion side (5) and the discharge opening (2);

in the release state, the back pressure element (111) is far away from the discharge channel (6), and the extrusion side (5) is communicated with the discharge hole (2).

2. Extrusion apparatus according to claim 1, wherein the outfeed channel (6) is arranged in an annular shape and the backpressure means (10) comprise a plurality of said stops (11) arranged in a circumferential array around the outfeed channel (6), each stop (11) closing independently the outfeed channel (6).

3. Extrusion apparatus according to claim 2, wherein the extrusion body comprises a drum (21) and an auger plate (23) surrounding the drum (21), the auger plate (23) extending from the feed side (4) to the extrusion side (5), the drum (21) extending from the feed side (4) to the discharge side (2), a plurality of said baffles (11) being circumferentially arranged around the drum (21).

4. Press according to claim 1, characterised in that the screen section (22) is provided with a conical shape, the area of the cross-section of the screen section (22) at the feed side (4) being larger than the area of the cross-section of the screen section (22) at the press side (5).

5. A press device according to claim 1, characterised in that the counter pressure mechanism (10) further comprises a support (26), the blocking part (11) further comprises a trigger (113) which abuts against the back pressure part (12) and a rotation shaft (112) which is rotatably connected to the support (26), the trigger (113) and the counter pressure element (111) are connected to both sides of the rotation shaft (112), and the trigger (113) moves in the opposite direction to the counter pressure element (111) when the counter pressure element (111) is switched between the blocking state and the release state.

6. Squeezing device according to claim 5, wherein the trigger (113) comprises a coupling member (1131) coupled to the rotation shaft (112) and a roller member (1132) rotatably coupled to the coupling member (1131), the back-pressure part (12) being held against a rolling surface of the roller member (1132).

7. Squeezing device according to claim 5, wherein the back-pressure part (12) comprises a holding part (122) that holds against the trigger part (113) and a holding body (121) that drives the holding part (122) to move towards the trigger part (113);

when the force applied to the holding piece (122) by the holding body (121) is larger than the force applied to the holding piece (122) by the trigger piece (113), the holding piece (122) moves towards the trigger piece (113); on the contrary, when the force applied to the holding piece (122) by the holding body (121) is smaller than the force applied to the holding piece (122) by the trigger piece (113), the holding piece (122) moves towards the holding body (121).

8. Extrusion apparatus according to claim 7, wherein the backpressure means (10) comprises a plurality of backpressure means (12), a plurality of abutment elements (122) are combined into a ring element, a plurality of abutment bodies (121) synchronously abut against the ring element, and the ring element abuts against the trigger element (113).

9. Extrusion apparatus according to claim 1, wherein the screen section (22) comprises a stationary screen (222) and a moving screen (221) nested together, the moving screen (221) is reciprocally movable in the discharge direction, and the stationary screen (222) always covers an end of the moving screen (221) remote from the discharge opening (2) or an end of the moving screen (221) remote from the discharge opening (2) always covers the stationary screen (222) when the moving screen (221) is moved.

10. Extrusion apparatus according to claim 9, wherein the end of the moving screen (221) facing the discharge opening (2) is fixedly connected to the backpressure means (10);

the side of removing screen cloth (221) sets up and is on a parallel with bracing piece (24) of ejection of compact direction, the extrusion mechanism still including the cover locate bracing piece (24) support section of thick bamboo (25), connect remove screen cloth (221) with support section of thick bamboo (25) support piece (26) and be used for the drive remove screen cloth (221) motion driving piece (27).

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