Sludge thickening, filter pressing and electro-osmosis integrated dewatering machine

Abstract

The present invention relates to a sludge concentration, filtration pressing and electro-osmosis integrated dehydration machine, which includes a sludge concentration device and an electro-osmosis dehydration device, and a vacuum dehydration device, wherein the vacuum dehydration device includes an upper trolley and a lower trolley forming a mud pressing channel, and the height of the mud pressing channel gradually narrows from the feed end to the discharge end; and the feed end of the mud pressing channel is connected to the outlet of the sludge concentration device, and the discharge end is connected to the sludge squeezing channel of the electro-osmosis dehydration device. On the one hand, the sludge of the present invention is sequentially concentrated, vacuum filtration pressed, and electro-osmosis filtration pressed, so that the solid content of the discharged sludge is 40-50%; on the other hand, vacuuming will not cause extrusion power loss, and the vacuuming difficulty is small. At the same time, the sludge is gradually filtered in the mud pressing channel formed by the upper and lower trolleys, and the power required is small, which reduces the cost.

Description

Technical Field

[0001] The invention belongs to the field of sludge treatment equipment, and in particular relates to a sludge concentration, filter pressing and electric osmosis integrated dehydrator. Background Art

[0002] With the development of social economy and the acceleration of urbanization, the number of urban sewage treatment plants and the sludge produced has increased rapidly. According to relevant materials, the sludge produced by sewage treatment plants in my country reached 300 million tons in 2010. Since the sludge must be treated by biochemical and flocculation before dehydration, and the sludge contains a large amount of cell water and attached water after dehydration, at present, the existing equipment and technology of almost all sewage treatment plants can only reduce the water content of sludge to about 80%. If the sludge water content is lower than 50% to meet the requirements of incineration, it will cost a lot. Therefore, almost all sewage treatment plants in my country can only landfill and pile up the sludge, which has caused serious environmental pollution problems.

[0003] In this field, sludge treatment equipment usually includes independently arranged sludge concentrating devices and dewatering machines. When sludge is treated, the sludge concentrating device is first used to concentrate the relatively thin sludge, and the sludge with reduced water content after concentration is then dehydrated in the dewatering machine.

[0004] For example, the patent number submitted by the applicant on August 14, 2019 is ZL201921321313.1, and the patent name is vertical sludge dewatering device (dewatering machine), which includes a frame, an extrusion drum, and a driving mechanism, wherein an extrusion area is formed between the extrusion drum and the mud outlet of the sludge thickening device, and the extrusion area has a sludge outlet. The vertical sludge dewatering device also includes a re-extrusion unit for re-extruding the sludge discharged from the mud outlet of the extrusion area, and the re-extrusion unit includes an extrusion plate close to the outer wall of the extrusion drum and forming an arc-shaped extrusion channel with the outer wall of the extrusion drum, and a bin plate arranged on the frame to form a closed bin with the extrusion plate, wherein the extrusion plate is a plate with a water filtering mesh, and the vertical sludge dewatering device also includes a vacuum extraction mechanism for forming a vacuum in the closed bin.

[0005] Although the above-mentioned vertical sludge dewatering device can achieve sludge dehydration under the synergistic effect of extrusion and vacuuming, and achieve the expected technical effect, the applicant further found in use that the extrusion drum has the following shortcomings:

[0006] 1) Since the length of the extrusion area is limited, the extrusion force required is large, which places high demands on the equipment;

[0007] 2) During the extrusion process, water flows out from both sides of the extrusion surface. Especially after the extrusion plate is extruded, the water will flow into the closed chamber and then be extracted by the vacuum mechanism. In this way, since the closed chamber needs to move synchronously with the extrusion roller, there will be power loss, and the difficulty of vacuuming is also great, resulting in high costs;

[0008] 3) After the above-mentioned concentration and vacuum filtration, the final solid content of the sludge is 25~30%, and the power required for extrusion is relatively large. Summary of the invention

[0009] The object of the present invention is to provide an improved sludge concentration, filter pressing and electro-osmosis integrated dehydrator.

[0010] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0011] A sludge concentration, filter pressing and electro-osmosis integrated dehydrating machine, comprising a sludge concentration device, an electro-osmosis dehydrating device, and a vacuum dehydrating device, wherein the vacuum dehydrating device comprises an upper trolley and a lower trolley, the upper trolley comprises an upper frame, a transmission roller, an annular filter cloth belt, a lower filter chamber of the annular filter cloth belt flattened from the inner side of the lower layer of the annular filter cloth belt, and a vacuum mechanism connected to the filter chamber; the lower trolley comprises a lower frame, an annular transmission chain, and a mud pressing component, there are multiple mud pressing components, and they are circumferentially distributed around the annular transmission chain, Among them, multiple mud pressing components located on the upper and lower layers of the annular transmission chain are in conflict with each other and are spliced ​​flush to form an upper lane and a lower lane with openings facing upward and downward, and water filtration holes are formed on the upper lane and the lower lane respectively; the lower layer of the annular filter cloth belt closes the opening of the upper lane corresponding to the lower layer and forms a mud pressing channel with the upper lane, and the height of the mud pressing channel gradually narrows from the feed end to the discharge end; and the feed end of the mud pressing channel is connected to the outlet of the sludge concentrating device, and the discharge end is connected to the sludge extrusion channel of the electro-osmosis dehydration device.

[0012] Preferably, the sludge thickening device includes a thickening box with a mud inlet and a mud outlet, a scraper plate group, and a mud discharge mechanism. The lower lane is formed with a connecting section at the feed end of the mud pressing channel. The mud outlet and the mud discharge mechanism are located above the connecting section, and the discharge end of the mud discharge mechanism extends into the feed end of the mud pressing channel.

[0013] Specifically, the bottom surface of the mud outlet is in contact with the surface of the upper carriageway, so that the mud discharged from the mud outlet is prevented from leaking out between the mud outlet and the upper carriageway.

[0014] According to a specific implementation and preferred aspect of the present invention, the two ends of the upper frame can be independently and movably adjusted relative to the lower frame, and the two ends of the upper frame are also respectively provided with a mud inlet metering scale and a mud outlet metering scale for measuring the thickness of the mud pressing channel. Here, the control of the amount of mud inlet and outlet is achieved by adjusting the height of the inlet and outlet ends, thereby achieving the expected dehydration rate.

[0015] According to another specific implementation and preferred aspect of the present invention, the water filter mesh plate includes a first water filter plate body extending linearly along the lower layer of the annular filter cloth belt and fully attached to the inner side of the lower layer of the annular filter cloth belt, and a second water filter plate body located above the first water filter plate body and having a cavity formed therein, wherein the vacuum pumping mechanism is connected to the cavity, and when working, the cavity is in a negative pressure state, and the water after pressure filtration enters the cavity from the first water filter plate body. On the one hand, the strength of the water filter mesh plate itself is ensured to avoid extrusion deformation; on the other hand, it is also convenient to collect the water that penetrates into the cavity after pressure filtration.

[0016] Preferably, a cavity support plate is provided in the cavity, a plurality of sub-cavities are connected, and the filter mesh plate further comprises a third filter plate body provided between the first filter plate body and the second filter plate body, wherein the water filtration rate of the third filter plate body is greater than the water filtration rate of the first filter plate body. Under the premise of not affecting the extraction of filtered water, the strength of the filter mesh plate is further strengthened to improve the sludge dewatering effect.

[0017] Furthermore, the second water filter plate body includes a top plate arranged parallel to the first water filter plate body, and waist plates extending downward from both ends of the top plate and forming a trapezoidal cross section, wherein the lower end of the waist plate is fixed to the third water filter plate body. In this way, not only is the strength of the second water filter plate enhanced, but also the installation of the transmission roller is facilitated.

[0018] Specifically, the cross section of the cavity formed by the top plate, the waist plate, and the third water filter plate body is an isosceles trapezoid, and the water filter mesh plate also includes extension joints formed at both ends of the bottom edge of the isosceles trapezoid, wherein the extension joint is formed with an arc surface that matches the corresponding end transmission roller, and the bottom surface of the extension joint is flush with the bottom surface of the first water filter plate body and supported on the inner side of the lower layer of the annular filter cloth belt. In this way, the water filter mesh plate is butted through the extension joints at both ends, connecting the bottoms of the transmission rollers at both ends to ensure the flatness of the lower layer of the annular filter cloth belt.

[0019] According to another specific implementation and preferred aspect of the present invention, the vacuuming mechanism includes a vacuuming chamber arranged on the top of the water filter mesh plate, an air suction pipeline for connecting one side of the top of the vacuuming chamber with the water filter chamber, an air outlet pipeline connected to one side of the bottom of the vacuuming chamber with the collection water tank, and a negative pressure power source, wherein under the negative pressure provided by the negative pressure power source, air and water are drawn into the collection water tank, and water and air are automatically separated under their own weight. In other words, there is no interference between the implementation of vacuuming and the extrusion force required to be provided by the sludge, so vacuuming will not cause extrusion power loss, and it is also very convenient to implement vacuuming.

[0020] Preferably, the vacuum chamber extends along the width direction of the annular filter cloth belt, and the vacuum chamber is arranged near the discharge end of the annular filter cloth belt. There are multiple suction pipelines, and the water filter chamber near the discharge end of the annular filter cloth belt is connected to the vacuum chamber respectively.

[0021] At the same time, in order to ensure strength, in this example, a reinforcing component and a positioning component having the same shape as the vacuum chamber are provided at the feed end of the water filter mesh plate.

[0022] According to another specific implementation and preferred aspect of the present invention, the transmission rollers are correspondingly arranged at both ends of the upper frame, the annular filter cloth belt is sleeved on the transmission rollers, the water filter cavity is formed by a water filter mesh plate and is located inside the annular filter cloth belt, the water filter mesh plate flattens the lower layer of the annular filter cloth belt from the inner side of the lower layer of the annular filter cloth belt, and the bottom of the water filter mesh plate is flush with the bottom of the transmission rollers at both ends. Here, the water filter cavity cannot be used to collect water after pressure filtration, and at the same time plays a role in shaping the annular filter cloth belt.

[0023] Preferably, the upper and lower layers of the annular filter cloth belt are arranged in parallel, and the transmission rollers include a main transmission roller and an auxiliary transmission roller, wherein the main transmission roller is located at the discharge end of the annular filter cloth belt, and there are two auxiliary transmission rollers, which are distributed up and down at the feed end of the annular filter cloth belt. Under the layout of three transmission rollers, the installation and tension adjustment of the annular filter cloth belt are convenient, and the movement of the annular filter cloth belt is more conducive to the transmission by the main transmission roller with a larger outer diameter. In this example, the annular filter cloth belt and the annular transmission chain rotate in opposite directions, and the sludge is transmitted from the feed end to the discharge end.

[0024] Preferably, the centers of the two auxiliary conveying rollers are aligned vertically, and the outer diameter of the lower auxiliary conveying roller is larger than that of the upper auxiliary conveying roller. Firstly, the pressure on the lower auxiliary conveying roller is greater; secondly, the filter cloth belt section at the formed end is inclined, so that an escape space is formed at the feeding end, thereby facilitating the sludge to be sent into the sludge pressing channel.

[0025] In addition, the upper trolley also includes a cleaning mechanism located on the upper part of the upper frame and capable of cleaning the inner and outer surfaces of the upper layer of the annular filter cloth belt from sludge, a filter cloth belt deviation prevention mechanism arranged on the opposite sides of the upper frame, and a vibration mechanism arranged on the water filter mesh plate.

[0026] Specifically, the cleaning mechanism includes a scraper assembly located below the upper layer of the annular filter cloth belt and capable of scraping off the sludge on the inner side of the passing annular filter cloth belt, and a flushing assembly arranged above the upper layer of the annular filter cloth belt.

[0027] Furthermore, the mud scraper assembly includes a mud groove and a scraper arranged in the mud groove, wherein the scraper includes a blade holder and a blade head movably and adjustably arranged on the blade holder.

[0028] In this example, the knife head contacts the inner wall of the upper layer of the annular filter cloth belt at an acute angle, thereby removing mud or water that may adhere to the inner wall of the upper layer of the annular filter cloth belt, thereby ensuring the water filtration performance of the annular filter cloth belt, thereby maximizing the dehydration of the sludge.

[0029] As for the flushing component, it mainly includes a flushing chamber, a nozzle capable of flushing the surface of the upper annular filter cloth belt, and a drainage pipeline for discharging the flushed water and mud.

[0030] Meanwhile, the cleaning process in this example is: firstly, the surface is washed, and then the inner side of the annular filter cloth belt is scraped. This can improve the water filtering performance of the annular filter cloth belt.

[0031] In this example, a mechanism to prevent the filter cloth belt from deviating is correspondingly arranged at the two ends of each transmission roller, and each mechanism to prevent the filter cloth belt from deviating includes a connecting seat connected to the frame on the corresponding side, and a deviation correction roller arranged on the connecting seat, wherein the deviation correction roller is formed with a wheel groove matching the filter cloth belt.

[0032] Specifically, the filter cloth belt deviation prevention mechanism located on both sides of the lower auxiliary transmission roller has a connecting seat that can swing or move linearly to meet the filter cloth belt deviation correction restrictions at different angles.

[0033] In this example, the vibration mechanism is a conventional vibrator, and there are two of them, wherein the two vibrators are spaced apart and distributed on a frame plate, and the frame plate is fixed on the top plate.

[0034] In this example, the lower trolley also includes an annular track frame arranged on the lower frame, wheels arranged at both ends of each mud pressing component, an inner support frame arranged inside the annular transmission chain, a guide rail arranged on the inner support frame, and a matching piece matched with the guide rail and fixed on each mud pressing component, wherein the wheels are rollingly arranged on the annular track frame, the guide rail extends along the length direction of the annular transmission chain, and the matching piece is slidingly or rollingly arranged on the guide rail. In this way, under the corresponding limit and support of the track and the guide rail, the stability of the movement of the mud pressing component is improved.

[0035] At the same time, the electro-osmosis dehydration device connects the discharge end of the mud pressing channel with the feed end of the mud squeezing channel of the electro-osmosis dehydration device through the mud connecting channel, and the discharge end of the mud pressing channel is located above the feed end of the mud squeezing channel. In this way, the sludge can be smoothly transferred to the electro-osmosis dehydration device.

[0036] In this example, a feed hopper is provided at the feed end of the sludge extrusion channel, and the sludge connecting channel connects the discharge end of the mud pressing channel with the left side of the bottom of the feed hopper. At the same time, a mud discharge mechanism is provided corresponding to the mud outlet of the feed hopper, wherein the discharge end of the mud discharge mechanism extends into the feed end of the sludge extrusion channel.

[0037] Due to the implementation of the above technical solution, the present invention has the following advantages compared with the prior art:

[0038] On the one hand, the sludge of the present invention is sequentially concentrated, vacuum-filtered and electro-osmotic-filtered, so that the solid content of the discharged sludge is 40-50%; on the other hand, vacuuming will not cause extrusion power loss, and the vacuuming difficulty is small. At the same time, the sludge is gradually filtered in the mud pressing channel formed by the upper and lower trolleys, and the power required is small, thereby reducing the cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0040] Figure 1 It is a schematic diagram of the main view of the sludge concentration, filtration and electro-osmosis integrated dehydrator of the present invention;

[0041] Figure 2 for Figure 1 Main view of sludge thickening and filtration

[0042] Figure 3 for Figure 2 A partial cross-sectional schematic diagram of

[0043] Figure 4 for Figure 1 Schematic diagram of the main view of the middle and upper car;

[0044] Figure 5 for Figure 4 AA section view;

[0045] Figure 6 for Figure 5 BB-direction cross-sectional view;

[0046] Figure 7 for Figure 5 Schematic diagram of CC section;

[0047] Figure 8 for Figure 1 The main view of the middle and lower trolley;

[0048] Fig. 9 for Figure 8 A top view schematic diagram of

[0049] Fig.10 for Fig. 9 DD section diagram;

[0050] Fig.11 for Figure 8 EE section view;

[0051] Among them: ①, sludge concentration device; X, concentration tank; G, scraper group; N, mud discharge mechanism;

[0052] ②, vacuum dehydration device; S1, upper trolley; s10, upper frame; s11, transmission roller; z, main transmission roller; f, auxiliary transmission roller; s12, annular filter cloth belt; s13, water filter chamber; b, water filter mesh plate; b1, first water filter plate body; b2, second water filter plate body; b20, top plate; b21, waist plate; b3, third water filter plate body; b4, compartment support plate; b5, extension joint; s14, vacuum mechanism; q1, vacuum chamber; q2, suction pipeline; q3, exhaust pipeline; s15, cleaning mechanism; g, mud scraper assembly; g1, mud trough; g2, scraper; g20, knife seat; g21, knife head; c, flushing assembly; c3, flushing chamber; s4, nozzle; c5, drainage pipeline; J, reinforcement component ; D, positioning component; s16, filter cloth belt deviation prevention mechanism; p1, connecting seat; p2, deviation correction roller; p20, wheel groove; s17, vibration mechanism; z1, vibrator; s18, flange hole; j, frame plate; S2, lower trolley; s20, lower frame; s21, ring transmission chain; s210, chain body; s211, sprocket; s22, mud pressing component; s23, ring track frame; s230, track groove; s24, frame wheel; s25, inner support frame; s26, middle guide rail; s260, track seat; s261, linear side rail; s262, top support rail; s27, matching parts; s270, guide roller; s271, support roller; t, mud pressing channel; c1, mud inlet metering scale; c2, mud outlet metering scale;

[0053] ③. Electro-osmosis dehydration device; 3. Feed hopper; 4. Mud pressing mechanism; s. Sludge squeezing channel;

[0054] L. Sludge connecting channel. DETAILED DESCRIPTION

[0055] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0056] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0057] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0058] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0059] In the invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0060] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0061] like Figure 1 As shown, the sludge concentration, filter pressing and electro-osmosis integrated dehydration machine involved in this embodiment includes a sludge concentration device ①, a vacuum dehydration device ② and an electro-osmosis dehydration device ③ which are arranged in sequence.

[0062] The sludge thickening device ① comprises a thickening box X with a mud inlet and a mud outlet, a mud scraper group G, and a mud discharge mechanism N.

[0063] Specifically, the concentration box X and the scraper assembly refer to patent No. ZL201510046423.1 and patent No. ZL201710095903.6, and the mud discharge mechanism N refers to ZL201921320400.5.

[0064] The vacuum dehydration device ② comprises an upper trolley S1 and a lower trolley S2 which are connected to the mud discharge mechanism N and form a mud pressing channel t.

[0065] Combination Figure 2 and Figure 3 As shown, the upper trolley S1 includes an upper frame s10, a transmission roller s11, an annular filter cloth belt s12, a water filter chamber s13, and a vacuum mechanism s14, wherein the vacuum mechanism s14 is connected to the water filter chamber s13.

[0066] The lower trolley S2 includes a lower frame s20, an annular transmission chain s21, and a mud pressing component s22. There are multiple mud pressing components s22, which are distributed circumferentially around the annular transmission chain s21. The multiple mud pressing components s22 located on the upper and lower layers of the annular transmission chain s21 are in contact with each other and are spliced ​​flush to form an upper lane and a lower lane with openings facing upward and downward, and water filtering holes are respectively formed on the upper lane and the lower lane.

[0067] The lower layer of the annular filter cloth belt s12 closes the opening of the corresponding upper lane below and forms a mud pressing channel t with the upper lane.

[0068] In this example, the height of the mud pressing channel t gradually narrows from the feed end to the discharge end.

[0069] In this example, the annular filter cloth belt s12 and the annular conveyor chain s21 rotate in opposite directions and convey the sludge from the feed end to the discharge end.

[0070] Combination Figure 4 As shown, the transmission rollers s11 are correspondingly arranged at the two ends of the upper frame s10, and the annular filter cloth belt sleeve s12 is arranged on the transmission roller s11.

[0071] In this example, the upper and lower layers of the annular filter cloth belt s12 are arranged in parallel, and the transmission roller s11 includes a main transmission roller z and an auxiliary transmission roller f, wherein the main transmission roller z is located at the discharge end of the annular filter cloth belt s12, and there are two auxiliary transmission rollers f, which are distributed up and down at the feed end of the annular filter cloth belt s12. With the layout of three transmission rollers s11, it is convenient to install and adjust the tension of the annular filter cloth belt s12, and then the movement of the annular filter cloth belt s12 is more facilitated by the transmission of the main transmission roller z with a larger outer diameter.

[0072] The centers of the two auxiliary conveying rollers f are aligned vertically, and the outer diameter of the lower auxiliary conveying roller f is larger than that of the upper auxiliary conveying roller f. First, the pressure on the lower auxiliary conveying roller f is large; second, the filter cloth belt section at the formed end is inclined, so that an escape space is formed at the feeding end, which makes it easier to send the sludge into the sludge pressing channel t.

[0073] Combination Figure 5 and Figure 6 As shown, the water filter chamber s13 is composed of a water filter mesh plate b and is located inside the annular filter cloth belt s12. The water filter mesh plate b flattens the lower layer of the annular filter cloth belt s12 from the inner side of the lower layer of the annular filter cloth belt s12, and the bottom of the water filter mesh plate b is flush with the bottom of the transmission rollers s11 at both ends, and the vacuum mechanism is connected to the water filter chamber.

[0074] Specifically, the water filter mesh plate b includes a first water filter plate body b1 extending straight along the lower layer of the annular filter cloth belt s12 and fully attached to the inner side of the lower layer of the annular filter cloth belt s12, a second water filter plate body b2 located above the first water filter plate body b1 and having a cavity formed therein, and a third water filter plate body b3 disposed between the first water filter plate body b1 and the second water filter plate body b2, wherein the vacuum pumping mechanism s14 is connected to the cavity, and when working, the cavity is in a negative pressure state, and the water after pressure filtration enters the cavity from the first water filter plate body. On the one hand, the strength of the water filter mesh plate itself is ensured to avoid extrusion deformation; on the other hand, it is also convenient for collecting water that penetrates into the cavity after pressure filtration.

[0075] A partition support plate b4 is provided in the cavity, and multiple sub-cavities are connected. The water filtration rate of the third water filter plate body b3 is greater than that of the first water filter plate body b1. Under the premise of not affecting the extraction of filtered water, the strength of the water filter mesh plate is further strengthened to improve the sludge dewatering effect.

[0076] In this example, the second water filter plate body b2 includes a top plate b20 arranged parallel to the first water filter plate body b1, and waist plates b21 extending downward from both ends of the top plate b20 and forming a trapezoidal cross section, wherein the lower end of the waist plate b21 is fixed to the third water filter plate body b3. In this way, not only is the strength of the second water filter plate body enhanced, but also the installation of the transmission roller is facilitated.

[0077] Specifically, the cross section of the cavity formed by the top plate b20, the waist plate b21, and the third water filter plate body b3 is an isosceles trapezoid, and the water filter mesh plate b also includes extension joints b5 formed at both ends of the bottom edge of the isosceles trapezoid, wherein the extension joint b5 is formed with an arc surface that matches the corresponding end transmission roller s11, and the bottom surface of the extension joint b5 is flush with the bottom surface of the first water filter plate body b1 and supported on the inner side of the lower layer of the annular filter cloth belt s12. In this way, the water filter mesh plate is butted through the extension joints at both ends, connecting the bottoms of the transmission rollers at both ends to ensure the flatness of the lower layer of the annular filter cloth belt.

[0078] The upper frame s10 can be independently adjusted up and down relative to the lower frame s20 at both ends, and the upper frame s10 is also provided with a mud inlet metering scale c1 and a mud outlet metering scale c2 for measuring the thickness of the mud pressing channel t at both ends. Here, the control of the mud inlet and outlet volume is achieved by adjusting the height of the inlet and outlet ends, thereby achieving the expected dehydration rate.

[0079] The vacuuming mechanism s14 includes a vacuuming chamber q1 arranged on the top of the water filter mesh plate b, an air suction pipeline q2 for connecting one side of the top of the vacuuming chamber q1 with the water filter chamber, an air outlet pipeline q3 connecting one side of the bottom of the vacuuming chamber q1 with the collection water tank, and a negative pressure power source, wherein under the negative pressure provided by the negative pressure power source, air and water are drawn into the collection water tank, and water and air are automatically separated under their own weight. In other words, there is no interference between the implementation of vacuuming and the extrusion force required to be provided by the sludge, so vacuuming will not cause extrusion power loss, and it is also very convenient to implement vacuuming.

[0080] In this example, the vacuum chamber q1 extends along the width direction of the annular filter cloth belt s12, and the vacuum chamber q1 is arranged near the discharge end of the annular filter cloth belt s12. There are multiple suction pipes q2, and the water filter chamber near the discharge end of the annular filter cloth belt s12 is connected to the vacuum chamber q1 respectively.

[0081] Combination Figure 7 As shown, in order to ensure strength, in this example, a reinforcing component J and a positioning component D having the same shape as the vacuum chamber q1 are provided at the feed end of the water filtering mesh plate b.

[0082] Under the above premise, the upper trolley S1 in this example also includes a cleaning mechanism s15 located on the upper part of the upper frame s10 and capable of cleaning the inner and outer surfaces of the upper layer of the annular filter cloth belt s12 from sludge, a filter cloth belt deviation prevention mechanism s16 arranged on the opposite sides of the upper frame s10, and a vibration mechanism s17 arranged on the water filter mesh plate b.

[0083] The cleaning mechanism s15 includes a scraper assembly g located below the upper layer of the endless filter cloth belt s12 and capable of scraping sludge on the inner side of the passing endless filter cloth belt s12, and a flushing assembly c arranged above the upper layer of the endless filter cloth belt s12.

[0084] The mud scraper assembly g comprises a mud groove g1 and a scraper g2 arranged in the mud groove g1, wherein the scraper g2 comprises a blade seat g20 and a blade head g21 movably and adjustably arranged on the blade seat g20.

[0085] In this example, the blade g21 contacts the inner wall of the upper layer of the annular filter cloth belt s12 at an acute angle, thereby removing mud or water that may adhere to the inner wall of the upper layer of the annular filter cloth belt s12, thereby ensuring the water filtration performance of the annular filter cloth belt s12, thereby maximizing the dehydration of the sludge.

[0086] As for the flushing component c, it mainly includes a flushing chamber c3, a nozzle c4 capable of flushing the surface of the upper annular filter cloth belt s12, and a drainage pipeline c5 for discharging the flushed water and mud.

[0087] Meanwhile, the cleaning process in this example is: firstly, the surface is washed, and then the inner side of the annular filter cloth belt is scraped. This can improve the water filtering performance of the annular filter cloth belt.

[0088] In this example, a filter cloth belt deviation prevention mechanism s16 is correspondingly arranged at the two ends of each transmission roller s11, and each filter cloth belt deviation prevention mechanism s16 includes a connecting seat p1 connected to the frame s10 on the corresponding side, and a deviation correction roller p2 arranged on the connecting seat p1, wherein the deviation correction roller p2 is formed with a wheel groove p20 matching the filter cloth belt s12.

[0089] Specifically, the filter cloth belt deviation prevention mechanism s16 located on both sides of the lower auxiliary transmission roller f, its connecting seat p1 can swing or move linearly to meet the filter cloth belt deviation correction restrictions at different angles.

[0090] In this example, the vibration mechanism s17 is a conventional vibrator z1, and there are two of them, wherein the two vibrators z1 are spaced apart on a frame plate j, and the frame plate j is fixed on the top plate b20.

[0091] At the same time, a flange hole s18 for disassembly and assembly is also provided on the upper frame s10.

[0092] Combination Figure 8and Fig. 9 As shown, the annular transmission chain s21 includes a chain body s210 and sprockets s211 located at both ends, and a mud pressing component s22 is provided corresponding to each chain link.

[0093] Combination Fig.10 and Fig.11 As shown, the lower trolley S2 further includes an annular track frame s23 arranged on the lower frame s20 and frame wheels s24 arranged at both ends of each mud pressing component s22.

[0094] In this example, the two ends of each chain link connecting shaft are formed with frame wheels s24, wherein the frame wheels s24 roll on the annular track frame s23 to realize the rotation of the annular transmission chain s21.

[0095] Specifically, a track groove s230 is formed on the annular track frame s23 , and the frame wheel s24 passes through the track groove s230 and rolls on the track groove s230 .

[0096] At the same time, an inner support frame s25 is provided inside the annular transmission chain s21, and a middle guide rail s26 is provided in the middle of the top of the inner support frame s25. A matching piece s27 matching the middle guide rail s26 is provided on the inner side of each mud pressing component s22.

[0097] In this example, the middle guide rail s26 includes a track seat s260 fixed on the inner support frame s25, a linear side rail s261 arranged on the track seat s260, and a top support rail s262. The matching part s27 is correspondingly arranged on the inner side of each mud pressing component s22, and includes a guide roller s270 correspondingly arranged in the linear side rail s261, and a support roller s271 freely rolling supported on the top support rail s262. The guide roller s270 and the support roller s271 cooperate to form a stable support in the middle part of the upper channel, which is convenient for squeezing the sludge.

[0098] Specifically, the upper lane is arranged horizontally, so that the corresponding annular filter cloth belt s12 above forms an angle with the surface of the upper lane, wherein the distance from the left end to the surface of the upper lane is greater than the distance from the right end to the surface of the upper lane. Therefore, the water filter chamber formed by the upper trolley is also arranged inclined, which facilitates the filtered water to flow to the right end and reduces the difficulty of vacuum extraction.

[0099] As for the electro-osmosis dehydration device ③, the structure involved is the same as the structure adopted by a high-efficiency electro-osmosis sludge dehydrator disclosed in ZL201710095903.6. It will not be elaborated on here, but it is also clear and feasible.

[0100] At the same time, in this example, the electro-osmosis dehydration device ③ connects the discharge end of the mud pressing channel t and the feed end of the sludge extrusion channel s of the electro-osmosis dehydration device ③ through the sludge connecting channel L, and the discharge end of the mud pressing channel t is located above the feed end of the sludge extrusion channel s.

[0101] Specifically, a feed hopper 3 is provided at the feed end of the sludge squeezing channel s, a sludge connecting channel L connects the discharge end of the mud pressing channel t with the left side of the bottom of the feed hopper 3 , and a mud pressing mechanism 4 is also provided at the mud outlet of the feed hopper 3 .

[0102] In this example, the structure of the mud pressing mechanism 4 is the same as the mud discharging mechanism N of the above-mentioned sludge concentrating device, and will not be repeated here.

[0103] In summary, the implementation process of this implementation is as follows:

[0104] The sludge enters the concentration box X from the mud inlet, and the water separated from the sludge is filtered out by the scraping and squeezing of the scraper group G. Then, under the guidance and limitation of the mud discharge mechanism N at the mud discharge port, the sludge enters the sludge channel t formed by the upper and lower trolleys from the left end. As the annular filter cloth belt s12 and the annular transmission chain s21 rotate in opposite directions, the sludge is transmitted to the right in the gradually narrowing mud pressing channel t. While being squeezed and transmitted, the water filtered out from the upper layer of the sludge channel t enters the water filter chamber and is discharged by the vacuum negative pressure. The sludge is dehydrated by negative pressure filtration in the upper layer and self-filtration in the lower layer, and the solid content of the sludge is 20-35%. Then, the discharged sludge enters the feed hopper 3 through the sludge connecting channel L, and under the guidance and restriction of the sludge pressing mechanism 4, the sludge enters the sludge squeezing channel s, and then further dehydrated by electro-osmosis and filter pressing, the solid content of the sludge is 40-50%.

[0105] Therefore, in the integrated machine involved in this embodiment, the solid content of the sludge is controlled at 15-20% under the concentration and filtration of the sludge concentrating device ①, and then the solid content of the sludge is controlled at 20-35% under further pressure filtration, vacuum filtration, and self-filtration of the upper trolley S1 and the lower trolley S2 of the sludge dewatering device ②, and further under electro-osmotic filtration, the solid content of the sludge is controlled at 40-50%. The sludge solid content control is higher than that of the vertical sludge dewatering device involved in ZL201921321313.1 of the present applicant (the difference is 5%~10%). In this way, especially at the end of sludge dewatering, even 1% improvement is very significant. At the same time, the power required for the filtration by the vacuum dewatering device ② in this application and the difficulty of implementing the vacuum are obviously smaller than the filtration power of the vertical sludge dewatering device involved in ZL201921321313.1, and the difficulty of implementing the vacuum is small. Moreover, the vacuumization and filtration do not interfere with each other, and the filtered water will not cause power loss during filtration.

[0106] The above detailed description of the present invention is intended to enable persons familiar with the art to understand the contents of the present invention and implement them. It does not limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A sludge concentration, filter pressing and electro-osmosis integrated dehydration machine, comprising a sludge concentration device and an electro-osmosis dehydration device, Features: The dehydrator also includes a vacuum dehydration device, wherein the vacuum dehydration device includes an upper trolley and a lower trolley, the upper trolley includes an upper frame, a transmission roller, an annular filter cloth belt, a lower filter cavity of the annular filter cloth belt that is flattened from the inner side of the lower layer of the annular filter cloth belt, and a vacuum mechanism connected to the filter cavity, the transmission rollers are correspondingly arranged at both ends of the upper frame, and the annular filter cloth belt is sleeved on the transmission rollers; The water filter cavity is composed of a water filter mesh plate and is located in the annular filter cloth belt. The water filter mesh plate flattens the lower layer of the annular filter cloth belt from the inner side of the lower layer of the annular filter cloth belt, and the bottom of the water filter mesh plate is flush with the bottom of the transmission rollers at both ends, and the vacuum mechanism is connected to the water filter cavity; The water filter mesh plate comprises a first water filter plate body extending in a straight line along the lower layer of the annular filter cloth belt and fully attached to the inner side of the lower layer of the annular filter cloth belt, and a second water filter plate body located above the first water filter plate body and having a cavity formed therein, wherein the vacuum pumping mechanism is connected to the cavity, and when working, the cavity is in a negative pressure state, and the water after pressure filtration enters the cavity from the first water filter plate body; The lower trolley includes a lower frame, an annular transmission chain, and a mud pressing component. There are multiple mud pressing components, which are circumferentially distributed around the annular transmission chain, wherein the multiple mud pressing components located on the upper and lower layers of the annular transmission chain are mutually opposed and flushly spliced ​​to form an upper lane and a lower lane with openings facing upward and downward, and water filtering holes are formed on the upper lane and the lower lane respectively; The lower layer of the annular filter cloth belt closes the opening of the upper lane corresponding thereto and forms a mud pressing channel with the upper lane, the height of the mud pressing channel gradually narrowing from the feed end to the discharge end; the feed end of the mud pressing channel is connected to the outlet of the sludge concentrating device, and the discharge end of the mud pressing channel is located above the feed end of the sludge squeezing channel of the electro-osmosis dehydration device; The vacuum pumping mechanism comprises a vacuum pumping chamber arranged on the top of the water filter mesh plate, an air intake pipeline for connecting one side of the top of the vacuum pumping chamber with the water filter chamber, an air outlet pipeline connected with one side of the bottom of the vacuum pumping chamber and a water collection tank, and a negative pressure power source, wherein under the negative pressure provided by the negative pressure power source, air and water are pumped into the water collection tank, and water and air are automatically separated under their own weight.

2. The sludge concentration, filter pressing and electro-osmosis integrated dehydrator according to claim 1, Features: The sludge thickening device includes a thickening box with a mud inlet and a mud outlet, a mud scraper group, and a mud discharge mechanism. The lower lane is formed with a connecting section at the feeding end of the mud pressing channel. The mud outlet and the mud discharge mechanism are located above the connecting section, and the discharge end of the mud discharge mechanism extends into the feeding end of the mud pressing channel.

3. The sludge concentration, filter pressing and electro-osmosis integrated dehydrator according to claim 1, Features: The two ends of the upper frame can be independently and movably adjusted up and down relative to the lower frame. The two ends of the upper frame are also respectively provided with a mud inlet metering scale and a mud outlet metering scale for measuring the thickness of the mud pressing channel.

4. The sludge concentration, filter pressing and electro-osmosis integrated dehydrator according to claim 3, Features: A partition support plate is provided in the cavity, and a plurality of sub-cavities are interconnected. The water filter mesh plate also includes a third water filter plate body arranged between the first water filter plate body and the second water filter plate body, wherein the water filtration rate of the third water filter plate body is greater than the water filtration rate of the first water filter plate body.

5. The sludge concentration, filter pressing and electro-osmosis integrated dehydrator according to claim 4, Features: The second water filter plate body comprises a top plate arranged parallel to the first water filter plate body, and waist plates extending downward from both ends of the top plate and forming a trapezoidal cross section, wherein the lower end of the waist plate is fixed to the third water filter plate body.

6. The sludge concentration, filter pressing and electro-osmosis integrated dehydrator according to claim 5, Features: The cross section of the cavity formed by the top plate, the waist plate, and the third water filter plate body is an isosceles trapezoid.

7. The sludge concentration, filter pressing and electro-osmosis integrated dehydrator according to claim 6, Features: The water filter mesh plate also includes extension joints formed at both ends of the base of the isosceles trapezoid, wherein the extension joint is formed with an arc surface that cooperates with the transmission roller at the corresponding end, and the bottom surface of the extension joint is flush with the bottom surface of the first water filter plate body and is supported on the inner side of the lower layer of the annular filter cloth belt.

8. The sludge concentration, filter pressing and electro-osmosis integrated dehydrator according to claim 1, Features: The transmission rollers are correspondingly arranged at the two ends of the upper frame, the annular filter cloth belt is sleeved on the transmission rollers, the water filter chamber is composed of a water filter mesh plate and is located inside the annular filter cloth belt, the water filter mesh plate flattens the lower layer of the annular filter cloth belt from the inner side of the lower layer of the annular filter cloth belt, and the bottom of the water filter mesh plate is flush with the bottom of the transmission rollers at both ends.

9. The sludge concentration, filter pressing and electro-osmosis integrated dehydrator according to claim 8, Features: The upper layer and the lower layer of the annular filter cloth belt are arranged in parallel, and the transmission roller includes a main transmission roller and an auxiliary transmission roller, wherein the main transmission roller is located at the discharge end of the annular filter cloth belt, and there are two auxiliary transmission rollers which are distributed up and down at the feed end of the annular filter cloth belt.

10. The sludge concentration, filter pressing and electro-osmosis integrated dehydrator according to claim 9, Features: The centers of the two auxiliary transmission rollers are aligned vertically, and the outer diameter of the auxiliary transmission roller at the lower side is greater than the outer diameter of the auxiliary transmission roller at the upper side.

11. The sludge concentration, filtration and electro-osmosis integrated dehydrator according to claim 1, Features: The upper trolley also includes a cleaning mechanism located on the upper part of the upper frame and capable of cleaning the inner and outer surfaces of the upper layer of the annular filter cloth belt from sludge, a filter cloth belt deviation prevention mechanism arranged on opposite sides of the upper frame, and a vibration mechanism arranged on the water filter mesh plate.

12. The sludge concentration, filter pressing and electro-osmosis integrated dehydrator according to claim 1, Features: The lower trolley also includes an annular track frame arranged on the lower frame, wheels arranged at both ends of each mud pressing component, an inner support frame arranged inside the annular transmission chain, a guide rail arranged on the inner support frame, and a matching piece matching the guide rail and fixed on each mud pressing component, wherein the wheels are rollingly arranged on the annular track frame, the guide rail extends along the length direction of the annular transmission chain, and the matching piece is slidingly or rollingly arranged on the guide rail.

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