Press

Abstract

The present invention discloses a press, comprising: a box body; a bracket; a box cover and a box closing mechanism; a filter plate group; a filter cloth; and a pressing mechanism; The press according to the present invention can be used for the deep dehydration of sludge.

Description

Technical Field

[0001] The present invention relates to a press for deep dewatering of sludge. Background Art

[0002] For example, sewage treatment plants, paper mills, chemical plants, food processing plants, etc. will all produce a large amount of solid-liquid mixed materials, which need to be dehydrated and concentrated before subsequent treatment. At present, there are many types of equipment available for solid-liquid separation, and the commonly used ones include plate and frame filter presses, belt filter presses, rotary drum vacuum filters, and disc vacuum filters, etc. Among them, the plate and frame filter press has the advantages of relatively simple structure, easy operation, stable operation, convenient maintenance, flexible selection range of filtration area, small floor area, and strong adaptability to materials, and is suitable for various occasions of medium and small-sized sludge dewatering treatment.

[0003] For example, in a sewage treatment plant, the produced sludge has a relatively large water content and good overall fluidity. Therefore, for example, a plate and frame filter press can send the sludge into the closed filter chamber of the plate and frame filter press through a slurry pump. With the development of technology, in order to improve, for example, the dewatering rate and dewatering efficiency of filtration, it is often necessary to add biomass powder to the sludge before sending the sludge into the filter press. In this regard, reference can be made to Chinese Patent Document CN115893791A, which provides a relatively detailed description of the sludge biomass mixture and its development history, and will not be elaborated here.

[0004] Related to the press is the property of the sludge biomass mixture. Compared with pure sludge, the sludge biomass mixture has poorer fluidity and relatively lower overall moisture content. Therefore, it is not suitable for slurry pump transportation and cannot be adapted to most current filter presses.

[0005] There are mainly two ways to obtain the sludge biomass mixture. One is to directly mix a certain amount of biomass powder into the sludge, such as the sludge biomass mixture obtained by the mixing method based on stirring as disclosed in Chinese Patent Document CN103060044A; the other is the method disclosed in Chinese Patent Document CN115893791A, where the sludge is first granulated and then the biomass powder is mixed in by mechanical mixing, so that a layer of biomass powder adheres to the surface of the sludge particles, making it easy to be pressed and form a filter cake. However, no matter which method is used, the fluidity of the sludge biomass mixture will be weakened, especially the sludge biomass powder mixture prepared in Chinese Patent Document CN115893791A. The reason is that in order to meet the requirements of granulation, the sludge needs to meet the moisture content requirements for granulation before granulation. In other words, the moisture content of this kind of sludge biomass mixture itself is relatively low, and the prepared material presents a granular state, and it is simply impossible to use a slurry pump for transportation, and it is difficult to use a traditional filter press for pressure filtration and dewatering.

[0006] Regarding fluidity, in some implementations, the sludge needs to be initially dewatered (dewatered to a water content of 50 - 85%) and then further dewatered (dewatered to 25 - 38%). After initial dewatering, the fluidity of the sludge becomes poor and it is not suitable for feeding by a slurry pump. The sludge used for preparing the biomass sludge mixture is usually a kind of initially dewatered sludge, such as the technical content disclosed in Chinese Patent Document CN115893791A. The biomass sludge mixture refers to a mixture in which biomass powder is mixed in the sludge. Summary of the Invention

[0007] The purpose of the present invention is to provide a press suitable for deep dewatering of sludge.

[0008] In an embodiment of the present invention, a press is provided, and its basic structure includes:

[0009] A box body, which is a rectangular box body and has a selected long direction as the pressing direction. The box body has a pressing chamber section in the pressing direction, and the upper and lower openings of the pressing chamber section are open; the box body correspondingly has a liquid drainage structure;

[0010] A bracket for supporting the box body to a predetermined height so that there is a discharge space below the box body;

[0011] A box cover and a box closing mechanism. The box cover has an upper cover plate that cooperates with the upper opening and a lower cover plate that cooperates with the lower opening, and is used to close or open the box by means of the box closing mechanism;

[0012] A filter plate group. In the pressing chamber section, the filter plates in the filter plate group are arranged in the pressing direction;

[0013] A filter cloth, including sleeve bags corresponding to the filter plates one by one. Adjacent sleeve bags are connected by side connection cloth on the side of the box body side plate. Correspondingly, the filter plates are sleeved into the sleeve bags to form a vertically through filter chamber; and

[0014] A pressing mechanism, located at one end of the pressing chamber section, and the output end is connected to the filter plate at this end or a separately provided pressing plate to push the filter plate group in the pressing direction;

[0015] If there is a separate pressing plate, the pressing plate is connected to the filter cloth or connected to the filter plate at the end where the pressing mechanism is located through a flexible member.

[0016] Optionally, the liquid drainage structure includes a confluence groove located on the inner surface of the side plate of the pressing chamber section for confluencing the pressed filtrate;

[0017] The leading-out part of the liquid drainage structure is communicated with the confluence groove.

[0018] Optionally, the leading-out part is:

[0019] The first structure, a through hole is opened on the side plate, and the through hole is equipped with a connector;

[0020] The second structure is that one or both ends of the confluence trough extend out of the pressing chamber section, and the filtrate is received by the bottom plate of the box body or part of the lower cover plate and discharged from the bottom plate; or

[0021] The third structure is adapted to both the first structure and the second structure.

[0022] Optionally, the confluence groove extends in the pressing direction.

[0023] Optionally, a transversely penetrating flow guide groove is provided on the filter plate.

[0024] Optionally, each side plate has a plurality of conduit grooves;

[0025] The number of the guide grooves is consistent with the number of the single-side confluence grooves and corresponds one to one, and is connected at the side of the side plate.

[0026] Optionally, the guide groove is a double-limb structure, the two limbs are connected in the middle of the filter plate, and one limb extends to one side of the filter plate, and the other limb extends to the other side of the filter plate;

[0027] The angle between the two limbs is 120~175 degrees.

[0028] Optionally, a guide rod for guiding the filter plate in the pressing direction is provided in the box body;

[0029] Correspondingly, a guide hole matching with the guide rod is opened on the filter plate.

[0030] Optionally, the power machine of the pressing mechanism is:

[0031] The first power machine is a pressing oil cylinder, the axis of which is parallel to the pressing direction, and the push rod of which is connected to the filter plate on the side where the power machine is located or to an independently arranged pressing plate;

[0032] The second power machine is a linear motor or an electric push rod, with the output connected to the filter plate or an independently arranged pressing plate on the side where the power machine is located; or

[0033] The rotary electric motor or hydraulic motor is connected to a conversion mechanism for converting rotation into linear motion; accordingly, the output member of the linear motion mechanism is connected to a filter plate on the side where the power machine is located or an independently arranged pressing plate.

[0034] Optionally, the box body is provided with a frame plate for mounting the pressing mechanism at the end where the pressing mechanism is located;

[0035] The frame plate includes a limit device for resetting the pressing mechanism.

[0036] Optionally, the box cover and the box closing mechanism have a first configuration or a second configuration, wherein the first configuration is:

[0037] One edge of the upper cover plate is hinged to one side of the upper opening;

[0038] One edge of the lower cover plate is hinged to one side of the lower opening;

[0039] The casing assembling mechanism includes an upper swing mechanism and a lower swing mechanism. The upper swing mechanism outputs to drive the upper cover plate so that the upper cover plate swings to the position of covering the upper opening or resets to the feeding position; the lower swing mechanism outputs to drive the lower cover plate so that the lower cover plate swings to the position of covering the lower opening or resets to the discharging position;

[0040] The second configuration is:

[0041] In the pressing direction, the upper cover plate is guided by the upper guide rail, and the lower cover plate is guided by the lower guide rail;

[0042] The casing assembling mechanism includes an upper linear driving mechanism for driving the upper cover plate to cover the upper opening or reset to the feeding position and a lower linear driving mechanism for driving the lower cover plate to cover the lower opening or reset to the discharging position in the pressing direction.

[0043] Optionally, it further includes a locking device for locking the upper cover plate and the lower cover plate after casing assembling.

[0044] Optionally, the locking device is:

[0045] The first locking device includes a vertical plate and a horizontal plate that is the same and is turned over on the same side and connected to both ends of the vertical plate. The distance between the two horizontal plates is equal to the distance between the upper surface of the upper cover plate and the lower surface of the lower cover plate after casing assembling, so as to clamp the upper and lower cover plates in the casing assembling state from the side;

[0046] The second locking device is configured as: fastening holes are opened on the upper cover plate and the lower cover plate, and screw holes are correspondingly opened on the box body. Bolts are used to lock the upper cover plate or the lower cover plate through the fastening holes and the screw holes corresponding to the fastening holes;

[0047] The third fastening device is configured as a hydraulic pressing plate. After casing assembling, the hydraulic pressing plate is turned to the back side of the corresponding cover plate to press the corresponding cover plate; or

[0048] The fourth locking device is a hinged bolt. The hinged bolt is correspondingly hinged on the box body. A notch is opened on the side of the upper cover plate or the lower cover plate. After casing assembling, the hinged bolt swings into the notch, and an adapter handwheel or a wing nut is used to lock the upper cover plate or the lower cover plate.

[0049] Optionally, a discharging mechanism is provided at one end of the box body opposite to the pressing mechanism. The output end of the discharging mechanism is connected to a filter plate located at that end or a discharging plate is separately provided to assist in discharging.

[0050] Optionally, the upper swing mechanism is located above the other end of the box body in the pressing direction;

[0051] The lower swing mechanism is located at the lower side of the other end of the box body in the pressing direction;

[0052] The other end of the box body in the pressing direction is strengthened by a reinforcing rib.

[0053] In an embodiment of the present invention, the pressing chamber section of the box body has an upper opening and a lower opening, and is equipped with a box cover and a box closing mechanism. Before feeding, the lower cover plate in the box cover seals the lower opening, and then feeding is carried out; afterwards, the upper cover plate seals the upper opening to complete box closing. The pressing mechanism pushes the filter plate group to move in the pressing direction, gradually dehydrating the material contained in the filter chamber. After pressing is completed, the lower cover plate is opened, the pressing mechanism is reset, and the upper cover plate in the box cover can also be opened simultaneously. At this time, the filter cake loses the support of the lower cover plate and falls, so that the discharging mechanism located below the box body can discharge the material. Based on the press of the present invention, since feeding is directly carried out from the upper opening, the requirement for the fluidity of the material is relatively low. Thus, it can be used for materials such as biomass sludge mixtures that have relatively poor fluidity and have been preliminarily dehydrated, but because of their granular shape, they can flow into the filter chamber, and have good adaptability. And the discharging and feeding are relatively simple, and the efficiency is relatively high. Description of the Drawings

[0054] Figure 1 It is a schematic three-dimensional structure diagram of a press in an embodiment (both the upper and lower cover plates are in the open state).

[0055] Figure 2 It is a schematic partial cross-sectional structure diagram of a press in an embodiment (the lower cover plate is in the box closing state).

[0056] Figure 3 It is a schematic structure diagram of a pressing plate in an embodiment.

[0057] Figure 4 It is a schematic structure diagram of the push rod of a pressing oil cylinder in an embodiment.

[0058] Figure 5 It is a schematic three-dimensional structure diagram of a box body in an embodiment.

[0059] Figure 6 It is a schematic structure diagram of a filter plate in an embodiment.

[0060] Figure 7 It is a schematic structure diagram of a filter cloth in an embodiment.

[0061] Figure 8 It is a schematic three-dimensional structure diagram of a press in an embodiment (both the upper and lower cover plates are in the open state).

[0062] Figure 9 It is a schematic partial cross-sectional structure diagram of a press in an embodiment (the lower box cover is in the box closing state).

[0063] In the figure: 1. Support, 2. Squeezing oil cylinder, 3. Frame plate, 4. Reinforcing plate, 5. Limiting plate, 6. Guide rod, 7. Squeezing plate, 8. Locking frame, 9. Filter plate, 10. Filter cloth, 11. Upper cover plate, 12. Oil cylinder, 13. Seat frame, 14. Reinforcing rib, 15. Thrust support, 16. Box body, 17. Liquid outlet hole, 18. Lower cover plate, 19. Oil cylinder, 20. Liquid outlet hole, 21. Side plate, 22. Bottom plate, 23. Push rod, 24. Rod chamber, 25. Filter chamber, 26. Hinge support, 27. Hinge shaft, 28. Hinge shaft, 29. Hinge support, 30. Discharge plate, 31. Discharge oil cylinder, 32. Hinge support, 33. Locking hole, 34. Sleeve part, 35. Guide hole, 36. Ring groove, 37. Locking hole, 38. Confluence groove, 39. Diversion groove, 40. Guide hole, 41. Through hole, 42. Front cloth, 43. Side connection cloth, 44. Sleeve bag, 45. Compartment, 46. Guide rail groove, 47. Guide rail, 48. Guide rail. Embodiment

[0064] As disclosed in Chinese Patent Document CN115893791A regarding the preparation of biomass sludge mixture, in order to meet the requirements of granulation, before granulation, the moisture content of the sludge is usually already lower than 80%, and in more applications, the moisture content of the sludge before granulation is between 60% and 70%, and the fluidity is already very poor, and it is no longer suitable for slurry pump transportation.

[0065] In some implementations, although biomass powder is not mixed into the sludge, the sludge can obtain a filter cake with an ideal moisture content after two dewaterings. Therefore, preliminary dewatering + deep dewatering itself will also make the moisture content of the sludge used as raw material during deep dewatering already relatively low, which is not suitable for slurry pump transportation through pipelines.

[0066] Furthermore, for example, after granulation and mixing with biomass powder, the surface of the formed sludge particles adheres to the biomass powder, having certain particle properties. Without further drying, it has the rolling property of particles, and can be fed based on the feeding method of particulate matter. Therefore, in the embodiments of the present invention, a solution is proposed in which the squeezing cabin section has an upper opening and a lower opening, where the upper opening is used for feeding, or in other words, for inlet, and the lower opening is used for discharging.

[0067] In the embodiments of the present invention, for the convenience of description, a reference direction is determined, that is, the squeezing direction, which is reflected in Figure 1 In the illustrated structure, this squeezing direction is the axial direction of the squeezing oil cylinder 2.

[0068] And based on the upper opening and the lower opening, the reference of the up-down direction or the vertical direction can be confirmed.

[0069] Generally speaking, based on the advancement of the squeezing oil cylinder 2, the protruding end of the push rod 23 is the head end, and the reverse end is the tail end or the seat end. According to people's general understanding, the left and right sides of the travel direction usually have a definite left and right reference, and are usually defined as "side", and the direction in which the push rod 23 rushes is usually understood as the positive direction.

[0070] In the embodiment of the present invention, the basic structure of the press is a box body 16, which is a rectangular box body as a whole. In the figure, its length-to-width ratio is relatively large, generally in the range of 2:1 to 6:1.

[0071] In addition to the pressing chamber section, the rest of the box body 16 can be provided with a bottom plate 22, which is used for connecting the two side plates 21 at the bottom of the box body 16, and can also be used as a component of the mounting base of the pressing cylinder 2, for example.

[0072] exist Figure 1 As can be seen, in addition to the pressing compartment section, for example, the limit plate 5, which constitutes part of the upper panel of the box body 16, the limit plate 5 is also used to determine the reset position of the pressing plate 7, for example.

[0073] The extension direction of the long side of the box 16 (referred to as the long direction) is the squeezing direction of the press. The box 16 has a squeezing compartment in the squeezing direction. As mentioned above, the squeezing compartment can be loaded with materials such as a flow plate or a loader, and the lower opening uses gravity to make the filter cake fall naturally after losing the support of the lower cover plate 18. Under this condition, the space below the box 16 is the unloading space. Therefore, the discharge of the filtrate should be avoided as much as possible to avoid conflict with the unloading space.

[0074] Therefore, the drainage structure for discharging the filtrate can be arranged at the front and rear ends and / or the left and right sides of the box 16 to make room for the discharge. Under the condition of making room for the discharge, it is also optional to arrange some types of drainage structures at the lower side of the box 16.

[0075] The bracket 1 for supporting the box body 16 is used to support the box body 16 to a certain height for the configuration of the discharge device. Since the present application focuses on how to achieve squeezing, the rest will not be described here.

[0076] As for the discharging device, it can be, for example, a belt conveyor, with the belt surface receiving the lower outlet.

[0077] Furthermore, regarding the lower cover plate 18 and the upper cover plate 11, they are used to seal the lower opening and the upper opening respectively in the squeezing state, so as to achieve the closing of the box, and during the squeezing process, there should be a certain sealing ability between the lower cover plate 18 and the lower opening, and between the upper cover plate 11 and the upper opening.

[0078] Since the said seal is a static seal and is relatively easy to achieve, in addition to pure mechanical engagement, sealing rings can be provided at the upper and lower openings, or rubber sealing rings can be provided on the interfaces of the upper cover plate 11 and the lower cover plate 18 for achieving sealing, so as to improve the sealing ability.

[0079] Both the upper cover plate 11 and the lower cover plate 18 are installed on the box body 16 in a hinged manner. Figure 1 and Figure 2 In [relevant context], both the upper cover plate 11 and the lower cover plate 18 are hinged on the short side of the corresponding opening. However, it should be noted that the two cover plates can also be hinged on the long side of the corresponding opening.

[0080] Figure 1 and Figure 2 In [relevant context], the driving mechanism for driving the upper cover plate 11 is a triangular mechanism for realizing the swinging of the upper cover plate 11. Correspondingly, the right edge of the upper cover plate 11 in Figure 2 is hinged to the right end of the box body 16 in the figure through a hinge shaft 28, and the axis of the hinge shaft 28 is a horizontal axis perpendicular to the axis of the pressing oil cylinder 2.

[0081] The back side of the upper cover plate 11 is hinged to the piston rod of an oil cylinder 12, and the cylinder block of the oil cylinder 12 is hinged to the Figure 2 mounting frame 13 shown in [relevant context], thus forming a hinge triangular mechanism.

[0082] The oil cylinder 12 shown in the figure can also be a cylinder. Relatively speaking, the power density of the oil cylinder 12 is large, and the power density of the cylinder is small, but the response speed of the cylinder is fast, and the leakage is mainly gas and is not easy to cause pollution.

[0083] Since the movement forms of the upper cover plate 11 and the lower cover plate 18 are similar, in order to show the states of both, in the figure, the upper cover plate 11 is in the reset state to make way for the feeding device, while the lower cover plate 18 is in the working state to realize box closing. The current state between the two cover plates in Figure 1 and Figure 2 can also be understood as the other state of the other cover plate.

[0084] Correspondingly, Figure 1 and Figure 2 show the swinging drive mechanism of the lower cover plate 18, which has the same configuration as the upper swinging mechanism, and the illustrated content is relatively clear and will not be elaborated here.

[0085] The functional component for pressure filtration is the filter plate group. The filter plate group is generally composed of multiple filter plates 9, and the filter plates 9 are arranged parallel to each other. In the embodiment of the present invention, the filter plates 9 are completely accommodated in the box body 16, and in the pressing chamber section, the filter plates 9 in the filter plate group are arranged in the pressing direction and are preferably arranged at uniform intervals.

[0086] One of the most typical features that distinguish it from the prior art is that, in the embodiments of the present invention, the filter cloth 10 used is an assembly composed of a number of pocket bags 44 made of filter fabrics. The pocket bags 44 are connected to each other on the side by side connection cloth 43. The side connection cloth 43 is used to determine the maximum distance between the pocket bags 44, thereby determining the compartments 45. The pocket bags 44 are used to correspond to the filter plates 9 one by one and are sleeved on the filter plates 9. At this time, the pocket bags 44 have upper bottoms. Therefore, after the filter plates 9 are sleeved into the pocket bags 44, when the filter plate group is pulled apart, the intervals between the filter plates 9 are determined by the side connection cloth 43, thereby forming the filter chambers 25. Obviously, the filter chambers 25 correspond to the compartments 45 one by one. During the process of pushing and pressing the filter plate group, the distance between the filter plates 9 gradually becomes smaller, thereby squeezing the filter material for dehydration.

[0087] The filter chamber 25 is a filter chamber 25 that is vertically through. Therefore, when the upper cover plate 11 is opened, the filler can be filled into the filter chamber 25 from above. When the lower cover plate 18 is opened, it is equivalent to the filter chamber 25 having no bottom, and the filter cake formed after pressing will fall due to its own weight.

[0088] As can be seen from the foregoing content, the filter plates 9 need to move in their normal directions to achieve pressing. Therefore, the provided pressing mechanism needs to push and press the filter plate group from one end or both ends.

[0089] Therefore, regarding the pressing mechanism, it is located at one end of the pressing cabin section, but it does not mean that it must be only at one end of the pressing cabin section. It only means that one of the pressing mechanisms is located at one end of the pressing cabin section.

[0090] The output end of the pressing mechanism is connected to the filter plate 9 located at that end or another provided pressing plate 7. Thus, when, for example, the pressing plate 7 is pushed, the required squeezing force for pressing will be generated between the adjacent filter plates 9 due to the extrusion of the filter material.

[0091] If an independent pressing plate 7 is provided, the pressing plate 7 is connected to the filter cloth 10 or connected to the filter plate 9 at the end where the pressing mechanism is located through a flexible member. In this way, a filter chamber 25 can also be formed between the pressing plate 7 and the adjacent filter plate 9.

[0092] In some embodiments, the liquid drainage structure includes the side plates located in the pressing cabin section, such as Figure 2 and Figure 5 the confluence grooves 38 on the inner surface of the side plate 21 shown in, for collecting and draining the filtrate under pressure.

[0093] Correspondingly, the leading-out part of the liquid drainage structure communicates with the confluence groove 38.

[0094] Regarding the confluence groove 38, it is preferably a groove structure extending along the pressing direction and has multiple ones.

[0095] Figure 5The flow collecting groove 38 shown is only a schematic representation. The flow collecting groove 38 can be evenly arranged in the up and down direction on the inner surface of the side plate 21, or can be arranged in a way with different densities, that is, the lower it is arranged, the denser it is.

[0096] In some embodiments, the flow collecting groove 38 can be only arranged in the middle and lower parts of the side plate 21.

[0097] In view of the fact that during the pressing process, the flow collecting groove 38 can extend out, for example, on the left side of the pressing plate 7 Figure 2 In other words, the flow collecting groove 38 itself can export the filtrate. At this time, for example, the bottom plate 22 of the box body 16 can be used as the export part for exporting the filtrate. The bottom plate 22 and the side plate 21 cooperate to form a groove, and in Figure 2 a weir is arranged on the bottom plate 22 below the pressing oil cylinder 2 as shown. The weir and the groove cooperate to form a filtrate pond, and part of the filtrate pond can be exported downward through, for example, the holes on the bottom plate 22.

[0098] Under the condition of not setting a weir, the pressed filtrate can also flow along the bottom plate 22 and be exported from, for example, Figure 2 the left end as shown.

[0099] In some embodiments, the filtrate can be directly exported from the side plate 21. Liquid outlet holes 20 are opened on the side plate 21 as Figure 1 shown. If the liquid outlet holes 17 and 20 are evenly arranged on the side plate 21, a slide plate, for example, needs to be arranged outside the side plate 21 to collect the pressed filtrate.

[0100] In some embodiments, if, for example, the number of the liquid outlet holes 20 is relatively small, a pipe joint can be used to connect a pipeline to export the pressed filtrate.

[0101] The pipe joint can be assembled on, for example, the liquid outlet hole 20 in a threaded connection or welding manner.

[0102] Regarding the two export methods of, for example, the liquid outlet hole 20 and the flow collecting groove 38, they can cooperate with each other, that is, be configured simultaneously.

[0103] In order to be more suitable for the export of the pressed filtrate, grooves are also provided on the filter plate 9, which are defined as diversion grooves 39. The diversion grooves 39 on the filter plate 9 are provided on both plate surfaces of the filter plate 9, and the opened diversion grooves 39 penetrate the filter plate 9 transversely, or in other words, the pressed filtrate is split to both sides along the diversion grooves 39.

[0104] Furthermore, there are multiple flow collecting grooves 38 on each side plate 21 to reduce the pressing resistance.

[0105] Correspondingly, the number of the diversion grooves 39 on the single side plate surface of the side plate is the same as the number of the single-side flow collecting grooves 38, and they correspond one by one and are communicated at the side of the side plate 21.

[0106] Regarding the diversion groove 39, it can be a straight-through groove, or a diversion groove 39 with other structures can be adopted. Figure 6 The middle diversion groove 39 is generally V-shaped as a whole, and has a double-limb structure. The two limbs are connected in the middle of the filter plate 9, and one limb extends to one side of the filter plate 9, and the other limb extends to the other side of the filter plate 9. According to this structure, under the condition of a relatively small number of diversion grooves 39, it still has a good diversion effect.

[0107] Furthermore, the included angle between the two limbs is 120° to 175°, and each limb has a downward-slanting trend, which is beneficial to the downward flow of the press filtrate.

[0108] In Figure 1 and Figure 2 In the structure shown, a guide rod 6 for the smooth advancement of the filter plate 9 is provided. The guide rod 6 is parallel to the pressing direction and correspondingly parallel to the axis of the pressing oil cylinder 2.

[0109] Correspondingly, a guide hole 35 for cooperating with the guide rod 6 is formed on the filter plate 9.

[0110] The number of the guide rods 6 is two, and they are located at the upper part of the filter chamber 25 to reduce the pulling or blocking of the filter cake, so as to facilitate the falling of the filter cake from the lower opening.

[0111] It should be known that the moisture content of the filter cake itself still reaches about 35%. Especially due to the delamination caused by the presence of biomass powder, it is easy to break, and the blocking effect of the guide rod 6 is limited.

[0112] Regarding the guide rod 6, it is not necessarily a round rod. It can also be, for example, a guide rod 6 with a fan-shaped cross-section at the lower part and a triangular cross-section at the middle and upper parts, which is beneficial to the discharging of the filter cake.

[0113] Figure 1 In the illustrated structure, the power machine of the pressing mechanism is a hydraulic cylinder, which is shown as the pressing oil cylinder 2 in the figure. The hydraulic cylinder has a large power density and is suitable for heavy-duty occasions. Although other types of power machines can be used, their power densities are relatively small, including electric motors, but the use of other types of power machines is not excluded.

[0114] When configured as the pressing oil cylinder 2, the axis of the pressing oil cylinder 2 is parallel to the pressing direction, and the push rod 23 of the pressing oil cylinder 2 is connected to the filter plate 9 on the side where the power machine is located or connected to an independently provided pressing plate 7.

[0115] Figure 3 In, one plate surface of the pressing plate 7 is provided with a sleeve portion 34 by, for example, welding. The sleeve portion 34 can have an internal thread, and Figure 4 One end of the push rod 23 shown in can have a thread, and the push rod 23 and the sleeve portion 34 can be connected by a thread.

[0116] In Figure 3In the exemplary structure, the inner hole of the sleeve portion 34 is a smooth hole, and the sleeve portion 34 is provided with a plurality of side holes, denoted as locking holes 33, and connection can be achieved using, for example, set screws. Specifically, after the head of the push rod 23 intervenes into the sleeve portion 34, several set screws are used for fastening.

[0117] In Figure 4 In the exemplary structure, the head of the push rod 23 has a ring groove 36. For example, a set screw intervenes into the ring groove 36 through the locking hole 33, and in addition to pressing radially, it also functions as a stop pin. Correspondingly, at this time, the locking hole 33 needs to be a threaded hole.

[0118] In some embodiments, the locking hole 33 is a smooth hole, and a radial threaded hole is provided in the head of the push rod 23, so as to achieve connection using screws.

[0119] In some embodiments, the power machine for pushing, for example, the pressing plate 7 can also be a linear motor or an electric push rod.

[0120] In view of the fact that in the mechanical field, the kinematic pair for converting rotational motion into linear motion belongs to a relatively common conversion mechanism. Therefore, it is also possible to use a rotary motor or a hydraulic motor as an option, except that it is necessary to perform transmission connection through a kinematic pair for converting rotational motion into linear motion. For example, the kinematic pair can be a nut-screw pair, or a rack and pinion pair, etc.

[0121] Regarding the pressing mechanism, an independent frame can be configured, and this frame is included in, for example, the bracket 1. The pressing mechanism can also use the box body 16 as the installation base.

[0122] Figure 1 The frame plate 3, the limit plate 5, the side plate 21, etc. in the shown structure form an assembly, which has relatively high strength. The frame plate 3 includes a portion parallel to the side plate 21, and a reinforcing plate 4 is provided between this portion and the side plate 21, so that the assembly has relatively high rigidity, thereby providing a reliable installation basis for, for example, the pressing cylinder 2.

[0123] In Figure 1 It also includes two locking frames 8. The locking device taking this locking frame 8 as an example is used for locking after the upper cover plate 11 and the lower cover plate 18 are combined into a box, so as to ensure the sealing reliability of the pressing space during the pressing process.

[0124] Among them, the locking frame 8 is generally a trough-shaped member, which includes a vertical plate parallel to the side plate 21, and a horizontal plate at each end of the vertical plate. The two horizontal plates extend towards the same side relative to the vertical plate, thereby forming a trough-shaped member. The trough opening is buckled on one side of the pressing box after the boxes are combined, so that the upper horizontal plate presses on the upper surface of the upper cover plate 11, and the lower horizontal plate supports the lower surface of the main lower cover plate 18.

[0125] At this time, the distance between the two horizontal plates is the distance between the upper surface of the upper cover plate 11 and the lower surface of the lower cover plate 18.

[0126] Correspondingly, the ends of the horizontal plates may have chamfers or rounded corners to facilitate the insertion of the locking frame 8.

[0127] Regarding the locking of the upper cover plate 11 and the lower cover plate 18, in some embodiments, fasteners can also be directly used for locking. For example, fastening holes are opened on the upper cover plate 11 and the lower cover plate 18, and screw holes are correspondingly opened on the box body 16 at the corresponding positions. Bolts are used to lock the upper cover plate 11 or the lower cover plate 18 through the fastening holes and the screw holes corresponding to the fastening holes.

[0128] The above two locking devices are relatively troublesome to use and require more manual intervention. In some embodiments, a hydraulic plate can be used. For example, the locking frame 8 is configured into two "half parts", and the half parts are installed on the side plates 21 of the box body 16 or an independent frame body through horizontal pin shafts. A swing cylinder is used to drive the half parts to swing, and the upper half part located above is used to lock the upper cover plate 11. Unlocking is achieved by reverse swing.

[0129] In yet another embodiment, articulated bolts are used. The articulated bolts are correspondingly articulated on the box body. Notch openings are provided on the side surfaces of the upper cover plate 11 or the lower cover plate 17. After the box is assembled, the notch openings appear as vertical notch openings. The articulated bolts are swung into the notch openings, and an adaptor handwheel or wing nut is used to lock the upper cover plate 11 or the lower cover plate 18.

[0130] Figure 2 At the right end of, a discharging mechanism is provided at one end of the box body 16 opposite to the pressing mechanism. The output end of the discharging mechanism is connected to the filter plate 9 located at this end or a discharging plate 30 is separately provided to assist in discharging. This avoids partial filter cakes being overly offset to the side where the discharging plate 30 is located, forming a pinch, and the movable discharging plate 30 facilitates the downward movement of this part of the filter cake.

[0131] Figure 1 and Figure 2 In, the upper swing mechanism is located above the other end of the box body 16 in the pressing direction; the lower swing mechanism is located below the other end of the box body 16 in the pressing direction; the other end of the box body 16 in the pressing direction is strengthened by a reinforcing rib 14.

[0132] Figure 1 In, the reinforcing rib 14 is annular, similar to a hoop, but is integrally fixed to the box body 16 by welding to improve the overall shear resistance of the box body 16.

[0133] Relative to Figure 1 and Figure 2 the exemplified press, Figure 8 and Figure 9The exemplary press shows another way of closing the mold, that is, the way of closing the mold by horizontally pushing the cover plate. Since, for example, the oil cylinders 12 and 19 are both linear output components, and closing the mold by pushing exactly conforms to the output characteristics of such linear output components. And Figure 8 and Figure 9 Although the hinged manner of the seat end of the oil cylinder 12 is schematically shown in, it is only to avoid movement interference and does not mean that such an assembly structure must be adopted.

[0134] Figure 8 and Figure 9 In, a guide rail 47 is provided on the outer side of the upper edge of the side panel of the press box body, and the upper cover plate 11 is correspondingly provided with a guide rail groove 46 that cooperates with the guide rail 47, and the two cooperate to form a guide rail pair.

[0135] Correspondingly, a guide rail 48 is provided on the outer side of the lower edge of the side panel of the press box body for cooperating with the lower guide rail groove provided on the lower cover plate 18 to form a guide rail pair.

[0136] The two guide rail pairs are used for reliable guiding of the cover plate.

[0137] Figure 8 and Figure 9 The remaining structures in can be referred to the content described in detail in the previous text with Figure 1 and Figure 2 as an example.

Claims

1. A press, characterized in that, comprising: A box body, which is a rectangular box body, and the selected long direction is the pressing direction. The box body has a pressing chamber section in the pressing direction, and the upper and lower openings of the pressing chamber section are open; the box body correspondingly has a liquid drainage structure; A bracket for supporting the box body to a predetermined height so that there is a discharge space below the box body; A box cover and a box closing mechanism. The box cover has an upper cover plate that cooperates with the upper opening and a lower cover plate that cooperates with the lower opening, and is used to close or open the box with the box closing mechanism; A filter plate group. In the pressing chamber section, the filter plates in the filter plate group are arranged in the pressing direction; A filter cloth, including sleeve bags corresponding to the filter plates one by one. Adjacent sleeve bags are connected by side connection cloth on the side of the box body side plate. Correspondingly, the filter plates are sleeved into the sleeve bags to form a vertically through filter chamber; and A pressing mechanism, located at one end of the pressing chamber section, and the output end is connected to the filter plate at this end or another provided pressing plate to push the filter plate group in the pressing direction; If there is an independent pressing plate, the pressing plate is connected to the filter cloth or connected to the filter plate at the end where the pressing mechanism is located through a flexible member; The liquid drainage structure includes a confluence groove on the inner surface of the side plate of the pressing chamber section for confluencing the pressed filtrate; The leading-out part of the liquid drainage structure communicates with the confluence groove; The leading-out part has a first structure or a second structure or a third structure; among them, the first structure is: a through hole is opened on the side plate, and a connector is installed in the through hole; the second structure is: one end or both ends of the confluence groove extend out of the pressing chamber section, and the pressed filtrate is received by the bottom plate of the box body or part of the lower cover plate and led out from the bottom plate; the third structure is: the first structure and the second structure are adapted at the same time; The confluence groove extends in the pressing direction; The box body is provided with a mounting plate for installing the pressing mechanism at the end where the pressing mechanism is located; The mounting plate includes a limiting device for resetting the pressing mechanism.

2. The press according to claim 1, characterized in that, A transverse through-flow guiding groove is opened on the filter plate.

3. The press according to claim 2, characterized in that, There are multiple confluence grooves on each side plate; The number of the guiding grooves is the same as the number of the confluence grooves on one side and corresponds one by one, and communicates at the side of the side plate.

4. The press according to claim 3, characterized in that, The guiding groove is of a double-leg structure, and the two legs communicate in the middle of the filter plate, and one leg extends to one side of the filter plate, and the other leg extends to the other side of the filter plate; The included angle between the two legs is 120 to 175 degrees.

5. The press according to claim 1, characterized in that, A guide rod for guiding the filter plate in the pressing direction is provided in the box body; Correspondingly, a guide hole cooperating with the guide rod is opened on the filter plate.

6. The press according to claim 1 or 5, characterized in that, The power machine of the pressing mechanism is: The first power machine, which is a pressing oil cylinder. The axis of the pressing oil cylinder is parallel to the pressing direction, and the push rod of the pressing oil cylinder is connected to the filter plate on the side where the power machine is located or connected to an independently provided pressing plate; or The second power machine, which is a linear motor or an electric push rod, to output and connect to the filter plate on the side where the power machine is located or an independently provided pressing plate; or A rotary motor or a hydraulic motor is connected to a conversion mechanism that converts rotary motion into linear motion; correspondingly, the output member of the linear motion mechanism is connected to the filter plate on the side where the power machine is located or to a separately provided pressing plate.

7. The press according to claim 1, characterized in that the box cover and the box closing mechanism have a first configuration or a second configuration, where the first configuration is: one edge of the upper cover plate is hinged to one side of the upper opening; one edge of the lower cover plate is hinged to one side of the lower opening; and the box closing mechanism includes an upper swing mechanism and a lower swing mechanism, where the upper swing mechanism outputs to drive the upper cover plate so that the upper cover plate swings to the position of closing the upper opening or resets to the feeding position; the lower swing mechanism outputs to drive the lower cover plate so that the lower cover plate swings to the position of closing the lower opening or resets to the discharging position; The second configuration is: in the pressing direction, the upper cover plate is guided by the upper guide rail, and the lower cover plate is guided by the lower guide rail; the box closing mechanism includes an upper linear driving mechanism for driving the upper cover plate to cover the upper opening or reset to the feeding position and a lower linear driving mechanism for driving the lower cover plate to cover the lower opening or reset to the discharging position in the pressing direction.

8. The press according to claim 7, characterized in that it further includes a locking device for locking the upper cover plate and the lower cover plate after closing the box.

9. The press according to claim 8, characterized in that the locking device is: The first locking device includes a vertical plate and a horizontal plate of the same side that is turned over and connected to both ends of the vertical plate. The distance between the two horizontal plates is equal to the distance between the upper surface of the upper cover plate and the lower surface of the lower cover plate after closing the box, so as to clamp the upper and lower cover plates in the closed box state from the side; or The second locking device is configured as: fastening holes are provided on the upper cover plate and the lower cover plate, and screw holes are correspondingly provided on the box body. Bolts are used to lock the upper cover plate or the lower cover plate through the fastening holes and the screw holes corresponding to the fastening holes; or The third locking device is configured as a hydraulic pressing plate. After closing the box, the hydraulic pressing plate is turned to the back side of the corresponding cover plate to press the corresponding cover plate; or The fourth locking device is a hinged bolt. The hinged bolt is correspondingly hinged on the box body. A notch is provided on the side of the upper cover plate or the lower cover plate. After closing the box, the hinged bolt swings into the notch, and an adapter handwheel or a wing nut is used to lock the upper cover plate or the lower cover plate.

10. The press according to claim 7, characterized in that a discharging mechanism is provided at one end of the box body opposite to the pressing mechanism, and the output end of the discharging mechanism is connected to the filter plate at that end or a separately provided discharging plate to assist in discharging.

11. The press according to claim 7 or 10, characterized in that the upper swing mechanism is located on the upper side of the other end of the box body in the pressing direction; the lower swing mechanism is located on the lower side of the other end of the box body in the pressing direction; the other end of the box body in the pressing direction is strengthened by a reinforcing rib.

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