Filtering and impurity removing device for sludge treatment

Abstract

The invention belongs to the technical field of sludge treatment equipment, and particularly relates to a filtering and impurity removing device for sludge treatment, which comprises a feed hopper, the bottom of the feeding hopper is communicated with a conveying barrel which is inclined upwards, and a tail barrel opening of the conveying barrel is communicated into the impurity removal box; a spiral conveying blade is installed in the conveying cylinder which is inclined upwards through a rotating shaft, the tail portion of the spiral conveying blade is connected with a spiral blade made of elastic materials, and the spiral blade is arranged in a shaftless mode. A sealing opening and closing mechanism is arranged in the impurity removal box and close to the cylinder opening of the conveying cylinder, and the sealing opening and closing mechanism is used for sealing and blocking the tail cylinder opening of the conveying cylinder; sludge to be subjected to impurity removal can fall into the impurity removal box in a scattering state, scattered impurity removal of impurities mixed in the sludge is achieved, and the situation that the impurity removal effect of the impurities mixed in the sludge is affected due to the fact that the sludge falls into the impurity removal box in a huddling state and the like is avoided.

Description

Technical Field

[0001] The invention belongs to the technical field of sludge treatment equipment, and in particular relates to a filtering and impurity removal device for sludge treatment. Background Art

[0002] In the environmental protection and chemical industry, the sludge produced from the production section of chemical plants and the dehydrated sludge produced by sewage treatment plants are produced in large quantities and are solid wastes. Some sludge from chemical plants is also hazardous waste and needs to be comprehensively treated and disposed of to avoid harming the ecological environment. Some regional centralized sludge treatment devices can collect sludge from various factories. The sludge water content is generally between 60% and 90%, and it inevitably contains some debris, such as sand, fiber cloth, bamboo, plastic and rubber products, metal products, etc. If these impurities are mixed in the sludge without pretreatment and removal, it is easy to cause damage to subsequent treatment systems such as anaerobic digestion, wet oxidation, atomization incineration and other equipment, and blockage of pipes and nozzles.

[0003] Most of the existing devices for filtering and removing impurities from sludge are to put the sludge in the sludge pool into a cleaning box, and then use the filter screen and other structures in the cleaning box to remove impurities such as metal, wood, stone, plastic, etc. mixed in the sludge; but since the sludge to be removed has a certain viscosity, if the sludge is directly transported to the cleaning box, it is easy to cause the sludge to clump in the cleaning box, which will not only affect the sludge filtering and impurity removal effect, but also easily cause the filter screen in the cleaning box to become blocked, thereby reducing the efficiency of sludge filtering and impurity removal. Summary of the invention

[0004] To solve the above technical problems, the present invention is achieved through the following technical solutions: The present invention discloses a filtering and impurity removal device for sludge treatment, comprising a feed hopper; the bottom of the feed hopper is connected to a conveying cylinder inclined upward, and the tail end of the conveying cylinder is connected to a impurity removal box; a spiral conveying blade is installed in the conveying cylinder inclined upward through a rotating shaft, and the tail end of the spiral conveying blade is connected to a spiral blade made of elastic material, and the spiral blade is shaftless; a sealing opening and closing mechanism is provided near the mouth of the conveying cylinder in the impurity removal box, and the sealing opening and closing mechanism is used to seal and block the tail end of the conveying cylinder.

[0005] Furthermore, the sealing opening and closing mechanism includes a baffle, a support block, an axle, a connecting block, a pull rope, a winding drum, a support frame and a guide roller. A baffle is provided at the inside of the dust removal box near the drum mouth of the conveying drum, and the top of the baffle is rotatably connected to a support block fixed to the inner wall of the dust removal box through an axle, and a torsion spring is connected between the baffle and the support block. A connecting block is fixed to the outer side surface of the baffle, and a pull rope is connected to the connecting block. The free end of the pull rope passes upward through the dust removal box and is wound around the winding drum. The winding drum is rotatably installed on the top of the dust removal box through a symmetrical support frame. A guide roller is rotatably installed on one side of the support frame, and the guide roller contacts the pull rope.

[0006] Furthermore, a buffer and material blocking mechanism is provided in the debris removal box, and the buffer and material blocking mechanism includes an elastic arc plate, an elastic member, a toggle strip and an elastic protrusion. An elastic arc plate is provided inside the debris removal box near the upper right corner, and the two ends of the elastic arc plate are connected to the side walls of the debris removal box by elastic members. The lower surface of the elastic arc plate extends horizontally to the left and is connected with a toggle strip, and the toggle strip is sleeved on the pull rope. The outer ring surface of the pull rope is installed with multiple elastic protrusions along its length direction, and the multiple elastic protrusions protrude outward.

[0007] Furthermore, a filtering and impurity removal mechanism is provided in the impurity removal box below the baffle, and the filtering and impurity removal mechanism includes a filter screen, an elastic strip, an L-shaped support strip, a sealing film and a collection box. A filter screen is installed inside the impurity removal box, and the filter screen is located below the baffle. The right end of the filter screen is elastically connected to the right side box wall of the impurity removal box through an elastic strip, and an L-shaped support strip is fixedly provided on the left side box wall of the impurity removal box. The horizontal strip of the L-shaped support strip is in contact with the left end of the filter screen, and a sealing film is connected between the vertical strip of the L-shaped support strip and the left end of the filter screen. A collection box is fixedly provided on the outside of the right side wall of the impurity removal box, and the box mouth of the collection box is flush with the surface of the filter screen.

[0008] Furthermore, the filtering and impurity removal mechanism also includes an electromagnetic ring and a metal soft strip. The electromagnetic ring is insulated and installed on the support block and the filter net. Pull ropes are inserted into the upper and lower electromagnetic rings. The metal soft strip is embedded in the pull rope, and the metal soft strip is in contact with the inner circle surface of the electromagnetic ring.

[0009] Furthermore, the filtering and impurity removal mechanism also includes a sealing plate and a pushing inclined rod. The sealing plate is elastically connected to the box opening where the collection box is connected to the impurity removal box through an elastic strip. The bottom of the sealing plate is in contact with the box opening of the collection box. The outer side surface of the sealing plate is obliquely connected to the pushing inclined rod, and the pushing inclined rod extends above the filter net.

[0010] Furthermore, a notch groove is provided on the outer ring surface of the inclined bottom of the conveying cylinder, and a filtrate net is installed in the notch groove. A liquid collecting box is installed on the conveying cylinder, and the liquid collecting box is aligned with the filtrate net.

[0011] Furthermore, the inner wall of the conveying cylinder is provided with a plurality of guide grooves along its length direction, and the plurality of guide grooves extend upward to the cylinder mouth of the conveying cylinder, and a scraper is installed on the spiral conveying blade, and the scraper is in corresponding contact with the filtrate net.

[0012] The present invention has the following beneficial effects: 1. The present invention arranges spiral conveying blades and shaftless spiral blades of elastic material obliquely in the conveying cylinder. When the sealing opening and closing mechanism is in a sealing state, as the spiral conveying blades continuously convey the sludge to the mouth of the conveying cylinder for gathering, the shaftless spiral blades made of elastic metal material will be compressed in the conveying cylinder, the sealing opening and closing mechanism will open quickly, and the elastic restoring force of the compressed spiral blades will throw the sludge gathered at the mouth of the conveying cylinder into the impurity removal box in a parabolic shape, so that the sludge to be removed will fall into the impurity removal box in a scattered state, thereby achieving decentralized impurity removal of impurities mixed in the sludge, and the impurity removal effect of the impurities mixed inside the impurity removal box will not be affected by the sludge falling into the impurity removal box in a clumping state.

[0013] 2. The present invention installs an elastic arc plate elastically suspended at the upper right corner of the debris removal box, and the scattered sludge will hit the elastic arc plate. At this time, the elastic arc plate will block the scattered sludge to prevent the sludge from hitting and adhering to the upper right corner of the debris removal box when it is scattered in the debris removal box. As the elastic protruding outward piece continuously contacts and separates from the shifting strip, the elastic arc plate will produce irregular shaking in the debris removal box, so that the thrown or scattered sludge can contact the irregularly shaking elastic arc plate, thereby further improving the dispersion effect of the thrown sludge in the debris removal box.

[0014] 3. The filter screen of the present invention is set by swinging, and the filter screen is adsorbed and connected with the pull rope through the electromagnetic ring. Therefore, the continuous winding and releasing of the pull rope will drive the filter screen to swing back and forth up and down in the impurity removal box, thereby accelerating the filtering and separation effect of the dispersed sludge and impurities. When the pull rope pulls the filter screen to the maximum tilt state alone, the box mouth of the collection box will be opened at this time, and the continued shaking of the filter screen will quickly discharge the impurities intercepted on the surface into the collection box for collection, thereby preventing excessive impurities from accumulating on the surface of the filter screen, which will affect the filtering and separation effect of the dispersed sludge and impurities.

[0015] Of course, any product implementing the present invention does not necessarily need to achieve all of the advantages described above at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings required for describing the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of the embodiment disclosed in the present invention; Figure 2 This is a schematic diagram of the internal structure of the impurity removal box according to the embodiment disclosed by the present invention; Figure 3 It is a cross-sectional view of a delivery cylinder according to an embodiment of the present invention; Figure 4 This is a schematic structural diagram of a buffer material blocking mechanism according to an embodiment of the present invention; Figure 5 It is a structural schematic diagram of the filtering and impurity removal mechanism of the disclosed embodiment of the present invention; Figure 6 Disclose embodiments of the present invention Figure 4 A partial enlarged view of point A in the middle.

[0018] In the figure: 1. Feed hopper; 2. conveying cylinder; 21. spiral conveying blade; 22. rotating shaft; 23. spiral blade; 24. notch groove; 25. guide groove; 3. Remove the debris box; 4. Sealing opening and closing mechanism; 41. Baffle; 42. Support block; 43. Axle rod; 44. Connecting block; 45. Draw rope; 46. Winding drum; 47. Support frame; 48. Guide roller; 5. Buffering and blocking mechanism; 51. Elastic arc plate; 52. Elastic member; 53. Pushing strip; 54. Elastic convex piece; 6. Filtering and impurity removal mechanism; 61. Filter screen; 62. Elastic strip; 63. L-shaped support strip; 64. Sealing film; 65. Collection box; 66. Electromagnetic ring; 67. Metal soft strip; 68. Sealing plate; 69. Pushing inclined rod; 7. Filtrate screen; 71. Liquid collecting box; 72. Scraper. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "opening", "upper", "lower", "thickness", "top", "middle", "length", "inside", "all around" and the like indicating orientation or positional relationship are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the components or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0021] See also Figure 1-Figure 6 As shown, the present invention is a filtering and impurity removal device for sludge treatment, comprising a feed hopper 1; the bottom of the feed hopper 1 is connected to a conveying cylinder 2 inclined upward, and the tail end of the conveying cylinder 2 is connected to a impurity removal box 3; a spiral conveying blade 21 is installed in the inclined upward conveying cylinder 2 through a rotating shaft 22, and the tail of the spiral conveying blade 21 is connected to a spiral blade 23 of elastic material, and the spiral blade 23 is a shaftless setting; a sealing opening and closing mechanism 4 is provided near the tube mouth of the conveying cylinder 2 in the impurity removal box 3, and the sealing opening and closing mechanism 4 is used to seal and block the tail end of the conveying cylinder 2; Specifically, the present invention connects the conveying cylinder 2 to the impurity removal box 3 at an angle. When the precipitated sludge needs to be removed, the sludge is put into the feed hopper 1, and the servo motor fixed at the end of the conveying cylinder 2 near the feed hopper 1 works, which drives the spiral conveying blade 21 to rotate through the rotating shaft 22, and then the sludge in the conveying cylinder 2 is conveyed upward at an angle to the connection between the impurity removal box 3 and the conveying cylinder 2. At this time, the sealing opening and closing mechanism 4 is in a sealing state, which blocks the mouth of the conveying cylinder 2. As the spiral conveying blade 21 continuously conveys the sludge to the mouth of the conveying cylinder 2 for aggregation, the spiral blade 23 made of shaftless elastic metal material is compressed in the conveying cylinder 2. When the pressure of the pressure sensor on the sealing and opening mechanism 4 reaches a preset threshold, the sealing and opening mechanism 4 will open quickly, and the elastic restoring force of the compressed spiral blades 23 will throw the sludge gathered at the mouth of the conveying cylinder 2 into the impurity removal box 3 in a parabolic shape, so that the sludge to be removed will fall into the impurity removal box 3 in a scattered state, thereby achieving decentralized impurity removal of impurities mixed in the sludge. The impurity removal effect of the impurities mixed inside will not be affected by the sludge falling into the impurity removal box 3 in a clumping state. At the same time, since the sludge is dispersed and falls on the filter screen 61 in the impurity removal box 3, the clogging of the filter screen 61 when removing the sludge can be reduced.

[0022] In the scheme designed by the present invention, the sealing opening and closing mechanism 4 includes a baffle 41, a support block 42, a shaft 43, a connecting block 44, a pull rope 45, a winding drum 46, a support frame 47 and a guide roller 48. A baffle 41 is provided at the tube mouth of the conveying drum 2 near the inside of the debris removal box 3, and the top of the baffle 41 is rotatably connected to the support block 42 fixed on the inner wall of the debris removal box 3 through the shaft 43, and a torsion spring is connected between the baffle 41 and the support block 42, a connecting block 44 is fixed on the outer side of the baffle 41, and a pull rope 45 is connected to the connecting block 44, the free end of the pull rope 45 passes through the debris removal box 3 upward and is wound around the winding drum 46, the winding drum 46 is rotatably installed on the top of the debris removal box 3 through a symmetrical support frame 47, a guide roller 48 is rotatably installed on one side of the support frame 47, and the guide roller 48 is in contact with the pull rope 45; Specifically, since a pressure sensor is provided on the side of the baffle 41 near the mouth of the conveying cylinder 2, when the pressure value of the pressure sensor reaches a preset threshold value, the servo motor fixed on the control support frame 47 is operated to drive the winding cylinder 46 to rotate rapidly through the output shaft, and then the wound pull rope 45 drives the baffle 41 to swing upward through the support block 42. At this time, the shaft 43 rotates around the support block 42, and the torsion spring is twisted, and then the rapid opening of the baffle 41 causes the elastic restoring force of the compressed spiral blade 23 to push the sludge to be quickly ejected and thrown into the impurity removal box 3, so that The sludge can be scattered and dropped into the impurity removal box 3, so as to quickly filter and remove the impurities mixed in the sludge. A gap is provided at the side wall of the impurity removal box 3 at the position corresponding to the baffle 41 to prevent it from being unable to rotate and open normally. When the winding drum 46 rotates in the opposite direction to release the wound rope 45, the baffle 41 will rotate and fit to the mouth of the conveying drum 2 under the recovery of the torsion spring, thereby facilitating the spiral conveying blade 21 to continue to convey the sludge to the mouth of the conveying drum 2, and then under the compression cooperation of the spiral blade 23, the sludge is ejected and dispersed into the impurity removal box 3 for impurity removal.

[0023] In the scheme designed by the present invention, a buffer material blocking mechanism 5 is provided in the impurity removal box 3, and the buffer material blocking mechanism 5 includes an elastic arc plate 51, an elastic member 52, a toggle strip 53 and an elastic convex piece 54. An elastic arc plate 51 is provided near the upper right corner of the impurity removal box 3, and the two ends of the elastic arc plate 51 are connected to the side wall of the impurity removal box 3 through the elastic member 52. The lower surface of the elastic arc plate 51 extends horizontally to the left and is connected with the toggle strip 53. The toggle strip 53 is sleeved on the pull rope 45. The outer ring surface of the pull rope 45 is installed with multiple elastic convex pieces 54 along its length direction, and multiple elastic convex pieces 54 protrude outward; Specifically, when the baffle plate 41 is quickly opened, the spring restoring force of the spiral blade 23 pushes the sludge to be thrown into the impurity removal box 3. At this time, the thrown sludge will hit the elastic arc plate 51. At this time, the elastic arc plate 51 will block the thrown sludge to prevent the sludge from hitting and adhering to the upper right corner of the impurity removal box 3 when it is thrown in the impurity removal box 3. Since the elastic arc plate 51 is suspended in the impurity removal box 3 by a spring member, when the sludge hits the elastic arc plate 51, the rebound force of the elastic arc plate 51 will reflect the adhered or accumulated sludge and throw it to the filtering and impurity removal mechanism 6 below, thereby realizing rapid impurity removal of the thrown sludge. When the pull rope 45 continues to extend upward to the outside of the impurity removal box 3 and reel it in, at this time, the multiple elastic protrusions 54 arranged equidistantly on the circumference of the pull rope 45 and above and below will contact the holes of the toggle strip 53, and then drive the elastic arc plate 51 to When the elastic protrusion 54 passes over the toggle strip 53, the spring element will push the elastic arc plate 51 to reset. Therefore, as the outwardly protruding elastic protrusion 54 continuously contacts and separates from the toggle strip 53, the elastic arc plate 51 will produce irregular shaking in the debris removal box 3, so that the projected or scattered sludge can contact with the irregularly shaking elastic arc plate 51, thereby further improving the dispersion effect of the projected sludge in the debris removal box 3. When the baffle 41 rotates in the opposite direction and the sealing cover is closed to the mouth of the conveying cylinder 2, the reverse release of the pull rope 45 will drive the elastic protrusion 54 to push the toggle strip 53 to swing downward, and at this time, the elastic arc plate 51 will produce irregular shaking downward, which can accelerate the shaking and separation effect of the sludge adhered to the surface, and prevent a lot of sludge adhered to the surface of the elastic arc plate 51, which affects the collection of the sludge after impurities are removed in the debris removal box 3.

[0024] In the scheme designed by the present invention, a filtering and impurity removing mechanism 6 is arranged below the baffle 41 in the impurity removing box 3, and the filtering and impurity removing mechanism 6 comprises a filter screen 61, an elastic strip 62, an L-shaped support strip 63, a sealing film 64 and a collecting box 65. A filter screen 61 is installed inside the impurity removing box 3, and the filter screen 61 is located below the baffle 41. The right end of the filter screen 61 is elastically connected to the right side box wall of the impurity removing box 3 through the elastic strip 62. An L-shaped support strip 63 is fixedly arranged on the left side box wall of the impurity removing box 3. The horizontal strip of the L-shaped support strip 63 contacts the left end of the filter screen 61. A sealing film 64 is connected between the vertical strip of the L-shaped support strip 63 and the left end of the filter screen 61. A collecting box 65 is fixedly arranged on the outside of the right side wall of the impurity removing box 3, and the box opening of the collecting box 65 is flush with the surface of the filter screen 61. Specifically, when the scattered or projected sludge enters the impurity removal box 3 and is dispersed and falls onto the filter screen 61 below through the obstruction of the elastic arc plate 51, the sludge on the filter screen 61 will fall into the collection bin at the bottom of the impurity removal box 3, and the granular or blocky impurities will be intercepted above the filter screen 61. When the pull rope 45 pulls the baffle 41 to open, the free end of the pull rope 45 will also pull the upper surface of the left end of the filter screen 61 to swing upward, thereby accelerating the filtering effect of the scattered sludge and impurities. Since the right end of the filter screen 61 is elastically connected to the box wall of the impurity removal box 3 through the elastic strip 62, it will not affect the upward tilting swing of the filter screen 61 The inclined end of the filter screen 61 that swings upward is connected to the L-shaped support bar 63 through the sealing film 64, so that the swinging inclined end of the filter screen 61 will not cause the impurities mixed in the dispersed sludge to fall into the collection bin below due to the gap between it and the impurity removal box 3. When the filter screen 61 is at the maximum tilt angle, the impurities gathered on the surface of the filter screen 61 will slide into the collection box 65 opened on the right, so as to collect and clean the impurities intercepted by the filtration. When the filter screen 61 is in a horizontal state, the L-shaped support bar 63 will support the filter screen 61 to prevent the sludge gathered on the surface of the filter screen 61 from falling.

[0025] In the scheme designed by the present invention, the filtering and impurity removal mechanism 6 also includes an electromagnetic ring 66 and a metal soft strip 67. The electromagnetic ring 66 is insulated and installed on the support block 42 and the filter screen 61. The upper and lower electromagnetic rings 66 are plugged with a pull rope 45. The metal soft strip 67 is embedded in the pull rope 45. The metal soft strip 67 is in contact with the inner ring surface of the electromagnetic ring 66. Specifically, in order to prevent the pull rope 45 from synchronously pulling the filter screen 61 to tilt when the baffle 41 is opened quickly, thereby affecting the separation effect of the dispersed sludge and impurities, the electromagnet insulated on the inner ring surface of the electromagnetic ring 66 on the filter screen 61 can be controlled to be de-energized, so that it is separated from the adsorption of the metal soft strip 67 on the pull rope 45, and then the pull rope 45 is separated from the connection with the filter screen 61, and then the winding of the pull rope 45 will only drive the baffle 41 to open quickly from the barrel mouth of the conveying cylinder 2. When the baffle 41 is sealed and covered to the barrel mouth of the conveying cylinder 2, the electromagnet on the inner ring surface of the electromagnetic ring 66 on the support block 42 is controlled to be de-energized, so as to separate the adsorption of the metal soft strip 67 on the pull rope 45. At this time, the pull rope 45 is separated from the connection with the support block 42, and the filter screen 61 is adsorbed and connected to the pull rope 45 through the electromagnetic ring 66. Therefore, the continuous winding and releasing of the pull rope 45 will drive the filter screen 61 to open quickly from the barrel mouth of the conveying cylinder 2. When the filter screen 61 is pulled to the maximum tilt state, the mouth of the collecting box 65 will be opened, and the continued shaking of the filter screen 61 will quickly discharge the impurities intercepted on the surface into the collecting box 65 for collection, thereby preventing excessive impurities from accumulating on the surface of the filter screen 61 and affecting the filtering and separation effect of the dispersed sludge and impurities; and because the bottom end of the pull rope 45 passes downward through the electromagnetic ring 66 and is provided with a limit ring, when the baffle 41 is rotated and opened quickly, the bottom end of the pull rope 45 will not be detached from the electromagnetic ring 66 when the pull rope 45 slides in the electromagnetic ring 66 on the filter screen 61.

[0026] In the scheme designed by the present invention, the filtering and impurity removal mechanism 6 also includes a sealing plate 68 and a push-up inclined rod 69. The box opening of the collection box 65 communicating with the impurity removal box 3 is elastically connected to the sealing plate 68 through an elastic strip 62. The bottom of the sealing plate 68 contacts the box opening of the collection box 65. The outer side surface of the sealing plate 68 is obliquely connected to the push-up inclined rod 69, and the push-up inclined rod 69 extends above the filter screen 61. Specifically, in order to prevent the opening of the collection box 65 from being in an open state, causing the sludge being filtered on the surface of the swinging filter screen 61 to enter the collection box 65, the present invention elastically connects the sealing plate 68 to the opening of the collection box 65, and extends to the top of the filter screen 61 through the push-up inclined rod 69. When the filter screen 61 swings slightly to remove and filter the scattered and falling sludge, the filter screen 61 will not contact the push-up inclined rod 69, and the sealing plate 68 will seal the opening of the collection box 65; when the filter screen 61 swings to the maximum When the tilt angle is large, the filter 61 will push the push rod 69, so that the sealing plate 68 will rotate and open, and the impurities filtered and intercepted on the surface of the filter 61 will slide and fall into the collection box 65, so as to realize automatic removal and collection of the intercepted impurities. When the filter 61 rotates to a horizontal state, the sealing plate 68 will swing to a vertical state under the elastic restoring force of the elastic strip 62 to seal the box mouth of the collection box 65, so that the filter 61 can continue to filter and remove impurities from the sprayed and dispersed sludge.

[0027] In the scheme designed by the present invention, a notch groove 24 is provided on the outer ring surface of the inclined bottom of the conveying cylinder 2, and a filtrate net 7 is installed in the notch groove 24, and a liquid collecting box 71 is installed on the conveying cylinder 2, and the liquid collecting box 71 is aligned with the filtrate net 7; specifically, when the sludge is transported to the mouth of the conveying cylinder 2 and compressed by the spiral blades 23, the liquid remaining in the sludge will be squeezed out, and the filtered liquid will flow downward along the cylinder wall of the conveying cylinder 2 to the bottom of the conveying cylinder 2, and then fall into the liquid collecting box 71 through the filtrate net 7 for collection, so that when the sludge is transported obliquely upward in the conveying cylinder 2, the liquid remaining in the sludge will also be pressed and discharged, thereby facilitating the preliminary dehydration of the removed sludge.

[0028] In the scheme designed by the present invention, the inner wall of the conveying cylinder 2 is provided with a plurality of guide grooves 25 along its length direction, and the plurality of guide grooves 25 extend upward to the cylinder mouth of the conveying cylinder 2, and a scraper 72 is installed on the spiral conveying blade 21, and the scraper 72 is in corresponding contact with the filtrate net 7; specifically, the filtered sewage will flow downward to the filtrate net 7 through the guide groove 25, so as to realize rapid collection of the filtered sewage, and the setting of the scraper 72 made of elastic material can drive the scraper 72 to rotate on the surface of the filtrate net 7 when the spiral conveying blade 21 rotates, so as to realize scraping and conveying of the sludge accumulated on the surface of the filtrate net 7, and prevent excessive sludge accumulated on the filtrate net 7 from causing blockage.

[0029] In the description of this specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0030] The preferred embodiments of the present invention disclosed above are only used to help illustrate the present invention. The preferred embodiments do not describe all the details in detail, nor do they limit the invention to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the present invention, so that those skilled in the art can understand and use the present invention well. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A filtering and impurity removal device for sludge treatment, characterized in that: comprising a feed hopper (1); The bottom of the feed hopper (1) is connected to a conveying cylinder (2) inclined upward, and the tail end of the conveying cylinder (2) is connected to the impurity removal box (3); A spiral conveying blade (21) is installed in the upwardly inclined conveying cylinder (2) via a rotating shaft (22), and a spiral blade (23) made of elastic material is connected to the tail of the spiral conveying blade (21), and the spiral blade (23) is arranged without a shaft; A sealing opening and closing mechanism (4) is provided in the impurity removal box (3) near the tube mouth of the conveying tube (2), wherein the sealing opening and closing mechanism (4) is used to seal and block the tube mouth of the rear end of the conveying tube (2); The sealing opening and closing mechanism (4) comprises a baffle (41), a support block (42), a shaft (43), a connecting block (44), a pull rope (45), a winding drum (46), a supporting frame (47) and a guide roller (48); a baffle (41) is arranged inside the impurity removal box (3) near the tube mouth of the conveying drum (2); and the top of the baffle (41) is rotatably connected to the supporting block (42) fixedly arranged on the inner wall of the impurity removal box (3) through the shaft (43); and the baffle (41) and the supporting block are connected to each other. A torsion spring is connected between the baffle plate (41) and the baffle plate (42). A connecting block (44) is fixedly provided on the outer side surface of the baffle plate (41). A pull rope (45) is connected to the connecting block (44). The free end of the pull rope (45) passes through the impurity removal box (3) upward and is wound on a winding drum (46). The winding drum (46) is rotatably mounted on the top of the impurity removal box (3) through a symmetrical support frame (47). A guide roller (48) is rotatably mounted on one side of the support frame (47). The guide roller (48) contacts the pull rope (45).

2. A filtering and impurity removal device for sludge treatment according to claim 1, characterized in that: A buffer material blocking mechanism (5) is provided inside the debris removal box (3), and the buffer material blocking mechanism (5) comprises an elastic arc plate (51), an elastic member (52), a toggle strip (53) and an elastic protrusion (54). An elastic arc plate (51) is provided inside the debris removal box (3) near the upper right corner, and the two ends of the elastic arc plate (51) are connected to the side wall of the debris removal box (3) through the elastic member (52). The lower surface of the elastic arc plate (51) extends horizontally to the left and is connected to the toggle strip (53). The toggle strip (53) is sleeved on the pull rope (45), and the outer ring surface of the pull rope (45) is provided with a plurality of elastic protrusions (54) along its length direction, and the plurality of elastic protrusions (54) protrude outward.

3. A filtering and impurity removal device for sludge treatment according to claim 2, characterized in that: A filtering and impurity removal mechanism (6) is arranged in the impurity removal box (3) below the baffle (41), and the filtering and impurity removal mechanism (6) comprises a filter screen (61), an elastic strip (62), an L-shaped support strip (63), a sealing film (64) and a collection box (65). A filter screen (61) is installed in the impurity removal box (3), and the filter screen (61) is located below the baffle (41). The right end of the filter screen (61) is elastically connected to the right side wall of the impurity removal box (3) through the elastic strip (62). An L-shaped support strip (63) is fixedly arranged on the left side wall of the impurity removal box (3). The horizontal strip of the L-shaped support strip (63) contacts the left end of the filter screen (61). A sealing film (64) is connected between the vertical strip of the L-shaped support strip (63) and the left end of the filter screen (61). A collection box (65) is fixedly arranged on the outside of the right side wall of the impurity removal box (3), and the box opening of the collection box (65) is flush with the surface of the filter screen (61).

4. The filtering and impurity removal device for sludge treatment according to claim 3 is characterized in that: The filtering and impurity removal mechanism (6) further comprises an electromagnetic ring (66) and a metal soft strip (67); the electromagnetic ring (66) is insulated and mounted on the support block (42) and the filter screen (61); a pull rope (45) is inserted into the upper and lower electromagnetic rings (66); the metal soft strip (67) is embedded in the pull rope (45); and the metal soft strip (67) is in contact with the inner ring surface of the electromagnetic ring (66).

5. The filtering and impurity removal device for sludge treatment according to claim 3 is characterized in that: The filtering and impurity removal mechanism (6) further comprises a sealing plate (68) and a push-up inclined rod (69); the box opening of the collecting box (65) communicating with the impurity removal box (3) is elastically connected to the sealing plate (68) via an elastic strip (62); the bottom of the sealing plate (68) contacts the box opening of the collecting box (65); the outer side surface of the sealing plate (68) is obliquely connected to the push-up inclined rod (69); and the push-up inclined rod (69) extends above the filter screen (61).

6. The filtering and impurity removal device for sludge treatment according to claim 1 is characterized in that: The outer ring surface of the inclined bottom of the conveying cylinder (2) is provided with a notch groove (24), and a filtrate net (7) is installed in the notch groove (24). A liquid collecting box (71) is installed on the conveying cylinder (2), and the liquid collecting box (71) is aligned with the filtrate net (7).

7. A filtering and impurity removal device for sludge treatment according to claim 6, characterized in that: The inner wall of the conveying cylinder (2) is provided with a plurality of guide grooves (25) along its length direction, and the plurality of guide grooves (25) extend upward to the cylinder mouth of the conveying cylinder (2). A scraper (72) is mounted on the spiral conveying blade (21), and the scraper (72) is in corresponding contact with the filtrate net (7).

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