WO2019228166A1

WO2019228166A1 - Automatic high-pressure filter press, and filter pressing, residue discharging and back washing method therefor

Info

Publication number: WO2019228166A1
Application number: PCT/CN2019/086155
Authority: WO
Inventors: 沈智奇
Original assignee: Shen Zhiqi
Priority date: 2018-05-28
Filing date: 2019-05-09
Publication date: 2019-12-05
Also published as: CN108654156A

Abstract

Disclosed are an automatic high-pressure filter press, and a filter pressing, residue discharging and back washing method therefor. The automatic high-pressure filter press comprises: a filter press cylinder (1), filter press plates (2, 3, 4, 5), a first hydraulic cylinder (9), a first connecting pipe (6), a residue-scraping device, an automatic residue-discharging device, a filtered water drainage device, a back washing device, a material inlet pipe (31) and a machine frame (21), wherein an active filter press plate (5), a movable passive filter press plate (4), a fixed passive filter press plate (3) and an end cover filter press plate (2) are provided inside the filter press cylinder (1); the residue-scraping device is arranged above a position between the end cover filter press plate (2) and a fourth hydraulic cylinder (32); and an automatic residue-discharging bucket (40), a water collection tank (42), and a belt conveyor (23), which is located outside the machine frame, are arranged below the position between the end cover filter press plate and the fourth hydraulic cylinder. During operation, an external slurry pump feeds a slurry to positions between the filter press plates (2, 3, 4, 5) inside the filter press cylinder (1) via the material inlet pipe (31); the first hydraulic cylinder (9) pushes the active filter press plate (5) to press the slurry inside the filter press cylinder (1) into filter residue cakes, and the filter residue cakes are discharged to the outside of the machine by means of the automatic residue-discharging device; by means of the configuration of water collection cavities (47, 54, 66, 73) being in communication with the first connecting pipe (6), filtered water from the filter press plates (2, 3, 4, 5) is collected and drained into the first connecting pipe (6), and is then drained to the outside of the machine; and for back washing, back washing water is introduced, enters the water collection cavities (47, 54, 66, 73) by means of the configuration of the first connecting pipe (6) being in communication with the water collection cavities (47, 54, 66, 73), and then performs back washing for filter screens.

Description

Automatic high-pressure filter press and method for backwashing of slag removal by pressure filtration

Technical field

The invention relates to a filter press, which belongs to the technical field of separation filtration, and in particular relates to an automatic high-pressure filter press and a method for backwashing the filter press and slag removal.

Background technique

The more advanced automatic vertical filter presses currently used in the market are composed of a large number of movable filter plates, diaphragm plates, slurry hoses, hydraulic hoses, relatively long circulating filter cloths, complex frame components and large Composed of tonnage top pump compaction mechanism. During operation, the machine has the disadvantages of a large number of movable filter plates and a large number of movable sealing parts, a large area, many wearing parts, a complex structure of the whole machine, and high operation and maintenance costs. At the same time, there are filter cakes that are extruded due to a small unit area pressure. Disadvantages such as high water content.

Summary of the Invention

The purpose of the present invention is to solve the above-mentioned shortcomings of filter presses currently on the market, to provide an automatic high-pressure filter press, which can be widely used in sewage treatment sludge, kaolin, slime, tailings and other products and other dewatering The product has the advantages of high yield, high pressure per unit area, low moisture content of filter cake, durability, few wearing parts, energy saving and high efficiency.

To achieve the above object, the present invention adopts the following technical solutions:

An automatic high-pressure filter press includes a filter press cylinder, an active filter press disc, a movable passive filter press disc, a fixed passive filter press disc, an end cover filter press disc, a first hydraulic oil cylinder, a fourth hydraulic oil cylinder, a water outlet pipe, Feed pipe, first connecting pipe, second connecting pipe and frame; cylindrical filter press cylinders are provided with outer flanges at the front and rear ends and fixed on the frame, and the filter press cylinder is arranged in order from front to back There are active filter plate, movable passive filter plate, fixed passive filter plate, and end cap filter plate; a hollow shaft is set in the center of the filter cylinder, and the fixed passive filter plate is fixed on the hollow shaft. The diameter of the sleeve, one end of the sleeve is connected with the movable passive filter plate, and the other end of the sleeve is provided with a plurality of second rollers for self-alignment. The second roller is fixedly connected to the sleeve through the second roller shaft bracket and is connected with the hollow shaft. The outer wall is in a rolling connection with each other. The rear end of the hollow shaft is provided with a limiting plate for the second roller; the hollow shaft and the sleeve extend through the center of the active filter plate into the first connection tube, and the other end of the hollow shaft passes through the end cover filter plate. The center extends into the second connecting pipe; One end is fixedly connected to the active filter plate, the other end is fixedly connected to the first hydraulic rod of the first hydraulic cylinder fixed on the frame; one end of the second connection pipe is fixedly connected to the end cover filter plate, and the other end is fixed to the machine The fourth hydraulic rod of the fourth hydraulic oil cylinder on the rack is fixedly connected.

Furthermore, the automatic high-pressure filter press is further provided with a chute bracket and a third hydraulic oil cylinder fixed on the frame, and the chute bracket is fixed above the rear end of the filter cylinder and the fourth hydraulic oil cylinder, A slag scraper bracket is driven and arranged below the third hydraulic oil cylinder, two ends of the slag scraper bracket are slidably connected to the chute bracket, and a plurality of slag scraper blades are arranged at the lower end of the slag scraper bracket.

Furthermore: the automatic high-pressure filter press further comprises an automatic slag discharge hopper, which is arranged below the slag scraper bracket and is arranged on the frame through a shaft sleeve, and the automatic slag discharge hopper passes through the second hydraulic oil cylinder A certain angle of rotation on the horizontal plane is realized; a water collecting tank is arranged below the automatic unloading hopper, and a belt conveyor is arranged outside the frame below the automatic unloading hopper.

Furthermore, the active pressure filter plate is provided with a first support plate having a diameter smaller than the pressure filter cylinder, and the first support plate is provided with a second water collecting cavity and a plurality of second water outlet holes, and the second water collecting cavity A third support orifice is provided on the front, a third filter is disposed on the front of the third support orifice, and the third support orifice and the periphery of the third filter are fixedly connected to the first support plate together. The first support plate and the third A plurality of second reinforcing columns are provided in the second water collecting cavity between the supporting orifice plates; a first sealing ring is provided on the outer periphery of the first supporting plate and is slidably connected with the filter press cylinder; a second bearing is provided on the inner periphery of the first supporting plate. The seal ring is in sliding connection with the sleeve.

Furthermore, the end cover pressure filter plate is provided with a second support plate having a diameter smaller than the pressure filter cylinder, an upper portion of the second support plate is provided with a feeding hole, and a lower portion is provided with a plurality of fourth water outlet holes, and the second support A fourth water collecting cavity is arranged on the plate, a sixth supporting orifice plate is arranged in front of the fourth collecting cavity, a sixth filtering net is arranged in front of the sixth supporting orifice plate, and the sixth supporting orifice plate and the periphery of the sixth filtering net together with The second support plate is fixedly connected to each other. The fourth water collecting cavity between the second support plate and the sixth support orifice plate is provided with a plurality of fourth reinforcing columns. A fourth seal ring is provided on the outer periphery of the second support plate and is connected with the filter press. The cylinder is in a sliding connection, and a fifth seal ring is provided on the inner periphery of the second support plate and is in sliding connection with the hollow shaft.

Furthermore, a second outer support ring having a diameter smaller than the filter press cylinder is provided on the outer periphery of the fixed passive filter plate, a second inner support ring is provided on the inner periphery, and a gutter and a number are provided on the second inner support ring. A fifth water outlet hole, a plurality of sixth water outlet holes are provided on the hollow shaft in the water collecting ditch, and the second inner support ring is fixedly connected to the hollow shaft; a second inner support ring is symmetrically installed with the second outer support ring There are four supporting orifice plates and a fifth supporting orifice plate, a fourth filtering net is arranged outside the fourth supporting orifice plate, and a fifth filtering net is arranged outside the fifth supporting orifice plate; between the fourth supporting orifice plate and the fifth supporting orifice plate For the third water collecting cavity, a plurality of third reinforcing columns supporting the fourth supporting orifice plate and the fifth supporting orifice plate are arranged in the third water collecting cavity.

Furthermore, the outer periphery of the movable passive filter plate is provided with a first outer support ring smaller than the filter cylinder, the inner periphery is provided with a first inner support ring, and the first inner support ring is provided with a plurality of third water outlet holes and The third sealing ring is in sliding connection with the hollow shaft; a first support orifice plate and a second support orifice plate are symmetrically installed between the first inner support ring and the first outer support ring, and a first support orifice plate is provided with a first A filter screen, a second filter screen is provided outside the second support orifice plate, and a plurality of support first support orifice plates and second support holes are provided in a first water collecting cavity between the first support orifice plate and the second support orifice plate. The first reinforcement column of the board.

Furthermore, a first water outlet is provided below the first connecting pipe, a three-way pipe is provided below the first water outlet, a water outlet pipe is provided at the lower end of the three-way pipe, and a water outlet valve is provided on the water outlet pipe; A water inlet pipe is provided at the end, and a water inlet valve is provided on the water inlet pipe; a feed hole is provided at the upper part of the end cap filter plate, and a feed pipe is provided outside the feed hole, and the feed pipe and the second support plate are fixedly connected to each other, and A feeding valve is arranged on the material pipe; a first feeding port is arranged under the fixed passive filter plate, and a second feeding port is arranged under the movable passive filter plate.

Furthermore, a plurality of self-aligning first rollers are provided outside the sleeve. The first rollers are mounted on a first roller shaft bracket fixedly connected to the first support plate. The first rollers and the sleeves are mutually Rolling connection; a number of centering third rollers are provided on the hollow shaft protruding from the second connecting tube in the center of the end cap filter plate, the third roller shaft bracket is fixedly connected to the hollow shaft, and the third roller is connected to the second connecting tube Rolling connections to each other.

Furthermore, the automatic high-pressure filter press according to the present invention further includes an automatic control system including a plurality of position sensors and pressure sensors. The automatic control system is a conventional automatic control system for realizing the hydraulic cylinders. Start and stop, control the opening and closing of the valve.

The invention also provides a method for filtering, slag-removing and backwashing using the above-mentioned automatic high-pressure filter press. The method consists in performing the following procedures cyclically during operation: resetting the filter-to-be-pressed program-filter press program-slag unloading Procedure-backwash procedure;

The procedure for resetting the filter to be pressed is as follows: firstly, the first hydraulic oil cylinder is driven to pull the first hydraulic rod backward, and the fourth hydraulic oil cylinder is driven to push the fourth hydraulic rod forward, so that the active filter plate in the filter cylinder is retracted to At the rear end of the pressure filter cylinder, the end cap filter plate enters the front of the filter cylinder and is sealed. The fixed passive filter plate and the movable passive filter plate are in the first roller shaft bracket, the second roller shaft bracket, the limit plate and the first Under the pushing limit of the three-roller shaft bracket, it is positioned according to the set distance in the filter cylinder, then the second hydraulic oil cylinder is started to push the automatic slag discharge bucket into the frame, and the third hydraulic oil cylinder is also started to support the squeegee blade holder. And drive the slag scraper upward to reset, then close the water inlet valve, open the water outlet valve and the feed valve;

The filter press procedure is as follows: the feed pump set outside the machine is started to send the sewage or slurry to be processed from the feed pipe into the filter tank through the feed hole, and then from the first feed port and the second feed The feed port is sent into the cavities in the filter press cylinder. When the cavities in the filter press cylinder are full, the pressure in the cylinder rises to the point that the feeding pump can no longer feed, and the feeding valve is closed, and the first hydraulic cylinder is activated to make the first hydraulic rod The active filter plate is driven to the top of the filter cylinder through the first connecting pipe. At this time, the movable passive filter plate and the fixed passive filter plate in the filter cylinder are passively squeezed toward each other by the material liquid between them. The end cap filter plate moves in the direction, and the distance between the filter plates is gradually reduced due to the gradual loss of filtered water. When the maximum pressure is set in the filter cylinder, the operation of the first hydraulic cylinder is stopped. The material liquid between the plates is pressed into a filter cake with a very low water content. During the filter press process, the filtered water in each filter plate is discharged as follows: the filtered water in the active filter plate is filtered by a third filter. Enter the third supporting orifice plate to the second water collecting cavity and flow into the first connecting pipe through several second water outlet holes; The filtered water of the passive pressure filter disc enters the first water collecting cavity through the first support screen and the second support screen through the first support orifice plate and the second support orifice plate, and then passes through a plurality of third outlet holes to collect water. The gap between the disk inflow sleeve and the hollow shaft then flows into the first connecting pipe; the filtered water that fixes the passive pressure filter disk passes through the fourth support screen and the fifth support screen through the fourth support orifice plate and the fifth support orifice plate into the first The three water collecting chambers flow through the fifth water outlet holes to the water collecting ditch, and then flow into the hollow shaft through the sixth water outlet holes, and then flow into the first connecting pipe; the filtered water of the end cover pressure filter plate passes through the sixth filter screen. The sixth supporting orifice plate enters the fourth water collecting cavity, flows into the second connecting pipe through the fourth outlet hole, and then flows into the first connecting pipe from the hollow shaft. Finally, all the filtered water concentrated in the first connecting pipe is passed through it. The first outlet hole provided below flows into the outlet pipe and exits the machine;

The slag unloading program is: synchronously starting the first hydraulic cylinder and the fourth hydraulic cylinder to push the filter discs and cake in the filter cylinder toward the front end of the filter cylinder through the first hydraulic rod, and synchronously pass the fourth hydraulic pressure. The rod drives the end cap filter plate to pull back. At this time, the end cap filter plate is blocked by the third roller shaft bracket to synchronously pull the hollow shaft, the fixed passive filter plate and the movable passive filter plate back together. When the pressure filter disc is pushed to the front pressure filter cylinder port, the first hydraulic oil cylinder stops working. When the end cover pressure filter disc moves backward to the set discharge position, the fourth hydraulic oil cylinder stops working. At this time, due to the hollow shaft's Move, the limiting plate on the hollow shaft pushes the sleeve and the movable passive filter plate together, so that the distance between the filter plates to be discharged between the front end of the filter cylinder and the fourth hydraulic cylinder is set. At this time, the third hydraulic cylinder is activated to drive the third hydraulic rod to push the slag scraper holder and the slag scraper downward, and scrape the slag adhered to each filter screen into the automatic inclined slag bucket in the lower frame. After the filter residue is unloaded, the third hydraulic cylinder will follow That is, the third hydraulic rod is driven to drive the slag scraper holder and the slag scraper upward to reset, and then the second hydraulic oil cylinder is started to rotate the automatic slag discharge bucket out of the outer belt conveyor of the machine through a rotating shaft, at this time the belt conveyor and The unloading device unloads the filter residue onto the belt conveyor and simultaneously outputs it outside the machine;

The backwashing procedure is as follows: open the water inlet valve, close the water outlet valve, start the high-pressure backflush pump set outside the machine to send the high-pressure backflush water from the water inlet pipe to the first connection pipe, and then the high-pressure water in the first connection pipe respectively Synchronous from: one, from several second water outlet holes of the active filter plate into its second water collection cavity, and then from each hole of the third support orifice plate to wash out the filter residue in the third filter mesh; Entered from the gap between the sleeve and the hollow shaft through the water collecting pan and several third water outlet holes into the first water collecting cavity, and then from the first support orifice plate and the second side of the first water collecting cavity respectively The outflow from each hole in the support orifice plate flushes the filter residue in the first and second filter mesh holes; three, flows from the center of the hollow shaft through the sixth water outlet hole, the gutter and the fifth water outlet hole into the first In the three water collecting chambers, and then flows out from the holes of the fourth support orifice plate and the fifth support orifice plate on both sides of the third water collection cavity to wash the filter residue in the fourth filter mesh and the fifth filter mesh; From the hollow shaft into the second connection pipe, and then flow from several fourth outlet holes In the fourth water collecting cavity, and then flows out from the holes in the sixth supporting orifice plate to wash the filter residue in the sixth filter mesh hole, and then the backwash water containing the filter residue washed out by each filter will flow downwards. It has been set in the water collecting tank in the frame below the filter plates, and then it is pumped back for treatment by the sewage pump installed outside the machine.

Beneficial effects:

The automatic high-pressure filter press of the present invention has a simple structure and few wearing parts. The repeated operation of the filter press, slag unloading and backwashing methods disclosed in the present invention can realize large output, high pressure, low water content in filter residue, and automatic filter screen. Backwash does not block, high degree of automation, durability, few wearing parts, wide application range and energy saving and high efficiency operation.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a schematic sectional structural view of an embodiment of the present invention;

2 is an enlarged view of A in FIG. 1;

Fig. 3 is a schematic diagram of the position of the filter plate during the slag unloading and backwashing procedures of the present invention.

In the picture: 1 filter press cylinder, 2, end cap filter plate, 3, fixed passive filter plate, 4, movable passive filter plate, 5, active filter plate, 6, first connection pipe, 7, first Roller, 8, second roller, 9, first hydraulic cylinder, 10, first hydraulic rod, 11, limit plate, 12, hollow shaft, 13, first water outlet, 14, inlet pipe, 15, inlet valve , 16, three-way pipe, 17, outlet valve, 18, outlet pipe, 19, casing, 20, first tie rod bolt, 21, frame, 22, second hydraulic cylinder, 23, belt conveyor, 24, first Two hydraulic rods, 25, third hydraulic cylinder, 26, third hydraulic rod, 27, chute bracket, 28, squeegee holder, 29, squeegee, 30, feed valve, 31, feed pipe, 32 Fourth hydraulic cylinder, 33, second connecting pipe, 34, fourth hydraulic rod, 35, third roller, 36, first feeding port, 37, second feeding port, 38, second tie rod bolt, 39 , Shaft, 40, automatic slag hopper, 41, slag hopper bracket, 42, water collecting tank, 43, support frame, 44, first outer support ring, 45, first filter screen, 46, first support orifice plate, 47. The first collection chamber, 48 First reinforcement column, 49, second support orifice plate, 50, second filter screen, 51, first seal ring, 52, first support plate, 53, third filter screen, 54, second water collecting cavity, 55 , Third support orifice plate, 56, second reinforcement column, 57, second outlet hole, 58, second seal ring, 59, water collecting pan, 60, third outlet hole, 61, first inner support ring, 62 Third seal ring, 63, second outer support ring, 64, fourth filter screen, 65, fourth support orifice plate, 66, third water collecting cavity, 67, third reinforcing column, 68, fifth support hole Plate, 69, fifth filter, 70, fourth seal ring, 71, second support plate, 72, feed hole, 73, fourth water collecting cavity, 74, fourth reinforcing column, 75, sixth support hole Plate, 76, fourth outlet, 77, sixth filter, 78, fifth seal, 79, fifth outlet, 80, gutter, 81, sixth outlet, 82, second inner support ring .

Specific implementation method:

The following describes in detail the automatic high-pressure filter press and the backwashing method of the present invention with reference to the accompanying drawings 1-3:

As shown in Figures 1-3, the specific embodiments of the automatic high-pressure filter press of the present invention mainly include: a pressure filter cylinder 1, an active filter plate 5, a movable passive filter plate 4, a fixed passive filter plate 3, and an end cap pressure. Filter disc 2, first hydraulic cylinder 9, second hydraulic cylinder 22, third hydraulic cylinder 25, fourth hydraulic cylinder 32, slag scraper 29, automatic slag discharge bucket 40, belt conveyor 23, water collecting tank 42, water outlet pipe 18. The feed pipe 31 and the frame 21 are composed. The filter press cylinder 1 has a cylindrical shape, and outer flanges are provided at the front and rear ends. The filter press cylinder 1 is provided with an active filter press disc 5 at the front end, and an end cap filter filter disc 2 at the rear end. A fixed passive filter plate 3 is set at a certain distance from the end cover filter plate 2. A plurality of active passive filter plates 4 are arranged between the active filter plate 5 and the fixed passive filter plate 3 in the filter cylinder 1. How much the number of discs 4 increases, the single output of the whole machine can be increased. A hollow shaft 12 is set in the center of the filter press cylinder 1. A fixed passive filter plate 3 is fixed to the hollow shaft 12 with bolts. A sleeve 19 larger than its diameter, and a water collecting pan 59 fixed to each other by a welding method is provided at the end of the sleeve 19 near the movable passive filter plate 4. The sleeve 19 and the movable passive filter plate 4 are bolted to each other through the water collecting plate 59 Fixed connection.

The first active filter plate 5 is provided with a first connecting pipe 6 with flanges at both ends and fixedly connected to each other with bolts through the flange. The other end of the first connecting pipe 6 is provided with a first hydraulic pressure with a flange. The oil cylinder 9 is fixedly connected to each other by bolts through the flange of the first hydraulic rod 10, and a second connection pipe 33 with flanges at both ends is provided behind the end cover pressure filter plate 2 and is fixed to each other with bolts through the flanges. For connection, the other end of the second connection pipe 33 is provided with a fourth hydraulic oil cylinder 32 with a flange and is fixedly connected to each other by bolts through the flange of the fourth hydraulic rod 34. The front end flange of the pressure filter cylinder 1 passes several first tie rods. The bolt 20 and the flange of the first hydraulic cylinder 9 are fixedly connected to each other. The rear end flange of the pressure filter cylinder 1 is fixedly connected to the flange of the fourth hydraulic cylinder 32 through a plurality of second tie rod bolts 38. A frame 21 is provided below the flange, the front and rear flanges of the filter press cylinder 1, and the flange of the fourth hydraulic oil cylinder 32, and each frame is fixed to the frame 21 with bolts.

A chute bracket 27 is provided above the rear flange of the filter cylinder 1 and the flange of the fourth hydraulic oil cylinder 32, and the lower end of the chute bracket 27 is bolted to the rear flange of the filter cylinder 1 and the 32 flange of the fourth hydraulic oil cylinder. Fixed to each other, a third hydraulic oil cylinder 25 is provided above the chute bracket 27 and is fixedly connected to each other with bolts. A slag knife holder 28 is provided below the third hydraulic oil cylinder 25 and is fixedly connected to the third hydraulic rod 26 with bolts. The two ends of the slag knife holder 28 are slidably connected to the chute bracket 27, and the slag knife holder 28 is provided with a plurality of squeegee blades 29 at the lower end and fixedly connected to each other with bolts. An automatic cylinder slag hopper 40 is provided in the lower frame 21 between the rear end flange of the pressure filter cylinder 1 and the fourth hydraulic oil cylinder 32 flange. The automatic slag hopper 40 is provided with a slag hopper support 41 with a shaft sleeve. A shaft sleeve fixed on the frame 21 is provided on the upper and lower frames 21 at one end of the automatic slag hopper 40, and a rotating shaft 39 is provided in the shaft sleeve and the shaft sleeve of the slag hopper bracket 41. The automatic slag hopper 40 passes The rotating shaft 39 is rotatably connected to the frame 21, and a second hydraulic oil cylinder 22 is provided beside the slag hopper bracket 41. The second hydraulic rod 24 in the cylinder is rotatably connected to the slag hopper bracket 41. The second hydraulic cylinder 22 The other end is hinged and connected with the bracket fixed on the frame 21 and the frame 21. A water collecting tank 42 is provided below the automatic slag hopper 40, and a belt conveyor 23 is provided outside the frame 21 below the automatic slag hopper 40. One end of the belt conveyor 23 is fixed to the frame 21 through a support frame 43.

One end of the hollow shaft 12 and the sleeve 19 extends through the center of the active filter plate 5 into the first connection pipe 6, and the other end of the hollow shaft 12 extends through the center of the end cover filter plate 2 into the second connection pipe 33. A plurality of self-aligning first rollers 7 are provided outside the 19. The first roller 7 and the first bracket 7 are fixedly connected to each other with bolts. The first roller 7 and the sleeve 19 are in a rolling connection with each other. A plurality of self-aligning second rollers 8 are provided. The shaft bracket of the second roller 8 is closely connected to the shaft bracket of the first roller 7 and the sleeve 19 with bolts. The second roller 8 and the hollow shaft 12 are in rolling connection with each other. The rear end of the hollow shaft 12 is provided with a limit plate 11 which is close to the shaft bracket of the second roller 8. The limit plate 11 and the hollow shaft 12 are fixedly connected with each other by bolts. A second connecting pipe 33 is located at the center of the end cap filter plate 2. A plurality of self-aligning third rollers 35 are provided on the hollow shaft 12 protruding from the inside. The shaft support of the third roller 35 abuts on the second support plate 71 and is fixedly connected with the hollow shaft 12 by bolts. The second connecting pipes 33 are connected to each other in a rolling manner.

A first water outlet 13 is provided below the first connection pipe 6, and a tee 16 is provided below the first water outlet 13 and is fixedly connected to the first connection pipe 6. A water outlet 18 is provided at the lower end of the tee 16 and is fixedly connected to each other. A water outlet valve 17 is provided on the water outlet pipe 18, a water inlet pipe 14 is provided on the side end of the three-way pipe 16 and is fixedly connected to each other, a water inlet valve 15 is provided on the water inlet pipe 14, and a feed hole is provided on the upper part of the end cover pressure filter plate 72. A feeding pipe 31 is provided outside the feeding hole 72. The feeding pipe 31 and the second support plate 71 are fixedly connected to each other. The feeding pipe 31 is provided with a feeding valve 30. A fixed passive filter plate 3 is provided with a first A feeding port 36 is provided with a second feeding port 37 below the movable passive filter plate 4.

The active filter plate 5 is provided with a first support plate 52 having a diameter smaller than that of the filter cylinder 1. The first support plate 52 is provided with a second water collecting cavity 54 and a plurality of second water outlet holes 57 and a second water collecting cavity 54. A third support hole plate 55 is provided on the front, and a third filter screen 53 is provided on the front of the third support hole plate 55. The third support hole plate 55 and the periphery of the third filter screen 53 are fixedly connected to the first support plate 52 together. A plurality of second reinforcing posts 56 are provided in the second water collecting cavity 54 between a support plate 52 and the third support hole plate 55 and one end is fixedly connected to the first support plate 52. An outer side of the first support plate 52 is provided. The first sealing ring 51 is in sliding connection with the filter press cylinder 1, and a second sealing ring 58 is provided in the inner side of the first support plate 52 and is in sliding connection with the sleeve 19.

A second support plate 71 having a diameter smaller than that of the pressure filter cylinder 1 is provided on the end cover pressure filter plate 2. The upper portion of the second support plate 71 is provided with a feeding hole 72, and the lower portion is provided with a plurality of fourth water outlet holes 76. The second support plate A fourth water collecting cavity 73 is provided on 71, a sixth supporting hole plate 75 is provided in front of the fourth water collecting cavity 73, a sixth filter screen 77, a sixth supporting hole plate 75, and a first The periphery of the six filters 77 is fixedly connected with the second support plate 71 together. The fourth water collecting cavity 73 between the second support plate 71 and the sixth support orifice plate 75 is provided with a plurality of fourth reinforcing posts 74 at one end and The second support plate 71 is fixedly connected to each other. A fourth seal ring 70 is provided on the outer side of the second support plate 71 and is slidably connected to the pressure filter cylinder 1. A fifth seal ring 78 is provided on the inner side of the second support plate 71 and is hollow. The shaft 12 is in a sliding connection.

A second outer support ring 63 having a diameter smaller than that of the filter press cylinder 1 is provided on the outer side of the fixed passive filter plate 3, and a second inner support ring 82 is provided on the inner side thereof. A water collecting ditch 80 and A plurality of fifth water outlet holes 79 and a plurality of sixth water outlet holes 81 are provided on the hollow shaft 12 in the water collecting ditch 80. The second inner support ring 82 is fixedly connected with the hollow shaft 12 by bolts. A fourth support hole plate 65 is provided on one side between the second outer support rings 63, and a fourth filter screen 64 is arranged in front of the fourth support hole plate 65, and the inner and outer edges thereof are together with the second inner support ring 82 and the second The outer support ring 63 is fixedly connected to each other, and the other side is provided with a fifth support hole plate 68. The fifth support hole plate 68 is provided with a fifth filter screen 69 and its inner and outer edges are together with the second inner support ring 82 and the first The two outer support rings 63 are fixedly connected to each other. A plurality of third reinforcing pillars 67 are disposed in the third water collecting cavity 66 between the fourth support orifice plate 65 and the fifth support orifice plate 68, and one end thereof is in line with the fourth support orifice plate 65. Fixed connection.

A first outer support ring 44 smaller than the filter press cylinder 1 is provided on the outer side of the movable passive filter plate 4, and a first inner support ring 61 is provided on the inner side thereof. The third inner support ring 61 is provided with a plurality of third water outlet holes 60. And the third seal ring 62 are in sliding connection with the hollow shaft 12. A second support hole plate 49 is provided on the side between the first inner support ring 61 and the first outer support ring 44, and a first support hole plate 49 is provided in front of the second support hole plate 49. The two filters 50 and their inner and outer edges are fixedly connected to the first inner support ring 61 and the first outer support ring 44 together, and the other side is provided with a first support orifice plate 46, and the first support orifice plate 46 is provided on the outside. The first filter screen 45 and its inner and outer edges are fixedly connected to the first inner support ring 61 and the first outer support ring 44 together. The first set between the first support orifice plate 46 and the second support orifice plate 49 The water cavity 47 is provided with a plurality of first reinforcing posts 48 at one end thereof and is fixedly connected to the first support hole plate 46.

The automatic high-pressure filter press according to the present invention further includes an automatic control system, which includes a plurality of position sensors and pressure sensors (not shown in the figure). The automatic control system is a conventional automatic control system for implementing various The start and stop of the hydraulic cylinder controls the opening and closing of the valve.

Method of working steps:

When the automatic high-pressure filter press according to the present invention is used for operation, it first enters the first resetting filter pressing procedure:

First synchronously start the first hydraulic cylinder 9 to drive the first hydraulic rod 10 to pull back, and the fourth hydraulic cylinder 32 to drive the fourth hydraulic rod 34 to push forward, so that the active filter plate 5 in the filter cylinder 1 is retracted to the filter cylinder. 1 at the rear end position, the end cover pressure filter disc 2 enters the pressure filter cylinder 1 and the front end is sealed (to facilitate the seal ring outside the end cover pressure filter disc to enter the pressure filter cylinder, the internal chamfer at the end of the pressure filter cylinder can be appropriately increased ), The fixed passive filter plate 3 and the movable passive filter plate 4 are pushed by the shaft bracket of the first roller 7, the shaft bracket of the second roller 8, the limit plate 11 and the shaft bracket of the third roller 35, Position in the filter cylinder 1 according to the set distance distribution, then start the second hydraulic oil cylinder 22 to push the automatic slag hopper 40 into the frame 21, and at the same time start the third hydraulic oil cylinder 25 and the squeegee holder 28 and drive each scraper. The slag knife 29 is reset upward, and then the water inlet valve 15 is closed, and the water outlet valve 17 and the feed valve 30 are opened.

Then enter the second filter press program: then start the feed pump set outside the machine to feed the sewage or slurry to be processed from the feed pipe 31 through the feed hole 72 into the filter tank 1, and then feed from the first Port 36 and the second feed port 37 are fed into the cavities in the filter press cylinder 1. When the cavities in the filter press cylinder 1 are filled, the pressure in the cylinder increases to the point that the feed pump can no longer feed, and it can enter the filter press. The program, however, closes the feed valve 30, activates the first hydraulic cylinder 9 and causes the first hydraulic rod 10 to drive the active filter plate 5 to the top of the filter cylinder 1 through the first connecting pipe 6. At this time, the activities in the filter cylinder 1 The passive filter plate 4 and the fixed passive filter plate 3 are passively squeezed and moved toward the end cover filter plate 2 under the push of the liquid between them. The distance between the filter plates is gradually lost due to the gradual loss of filtered water. Gradually shrink, when the maximum pressure is set in the pressure filter cylinder 1, the operation of the first hydraulic oil cylinder 9 will be stopped immediately. At this time, the material liquid between the filter plates will be pressed into a filter cake with very low water content. During the filter pressing process between the filter press discs, the filtered water in their respective filter press discs is discharged as follows: The filtered water in the active filter press disc 5 is: The three filtering screens 53 enter the third supporting orifice plate 55 to the second water collecting cavity 54 and then flow into the first connecting pipe 6 through the plurality of second water outlet holes 57. The filtered water of the movable passive pressure filter disc 4 is: The filter screen 45 and the second filter screen 50 enter the first water collecting cavity 47 through the first supporting orifice plate 46 and the second supporting orifice plate 49, and then flow into the casing from the third water outlet holes 60 through the water collecting pan 59. The gap between 19 and the hollow shaft 12 flows into the first connecting pipe 6 again; the filtered water of the fixed passive filter plate 3 is: the fourth filter 64 and the fifth filter 69 pass through the fourth support orifice plate 65 and the first The five supporting orifice plates 68 enter the third water collecting cavity 66 and then flow into the water collecting ditch 80 through the number of fifth water outlet holes 79 and then flow into the hollow shaft 12 through the number of sixth water outlet holes 81 and then into the first connecting pipe 6; The filtered water of the end cap pressure filter disc 2 is: the sixth filtering net 77 enters the fourth water collecting cavity 73 through the sixth supporting orifice plate 75, and then flows into the second connecting pipe 33 through the fourth water outlet hole 76, and then from The hollow shaft 12 flows into the first connecting pipe 6, and finally all the filtered water collected in the first connecting pipe 6 flows into the water outlet pipe 18 through the first water outlet hole 13 provided below it. outer.

Then enter the third slag unloading program: the first hydraulic cylinder 9 and the fourth hydraulic cylinder 32 are started synchronously, and the filter discs and filter cake in the filter cylinder 1 are pushed toward the front end of the filter cylinder 1 by the first hydraulic rod 10 Move, synchronously drive the end cover pressure filter disc 2 to pull back through the fourth hydraulic rod 34, and then the end cover pressure filter disc 2 blocks the hollow shaft 12 and fixed passive pressure filter disc 3 through the shaft bracket of the third roller 35. And the active passive filter plate 4 is pulled back together. When the active filter plate 5 is pushed to the front filter cylinder 1 port, the first hydraulic cylinder 9 immediately stops working. When the end cover filter plate 2 is moved backward to The set discharge position immediately stops the operation of the fourth hydraulic cylinder 32. At this time, due to the movement of the hollow shaft 12, the limit plate 11 on the hollow shaft 12 pushes the sleeve 19 and the movable passive filter plate 4 to move together, so that The distance between the filter discs of the filter residue to be discharged between the front end of the filter cylinder 1 and the fourth hydraulic oil cylinder 32 reaches the set slag discharge distance. At this time, the third hydraulic oil cylinder 25 is driven to drive the third hydraulic rod 26 to scrape the slag. The knife holder 28 and the slag scraper 29 are pushed down to scrape the slag adhered to each screen onto the lower machine. Automatic swash slag hopper 40 in 21, scum intermediate blade may be designed with a U-shaped groove, temporal scum core pipe, casing and other components by a U-shaped slot to obtain the largest possible area of the slag scraper. After the slag is unloaded, the third hydraulic cylinder 25 then drives the third hydraulic rod 26 to reset the squeegee bracket 28 and the squeegee 29 upward, and then starts the second hydraulic cylinder 22 to rotate the automatic slag discharge bucket 40 through the shaft 39 Above the belt conveyor 23 outside the machine, at this time, the belt conveyor 23 and the self-unloading device are simultaneously activated to discharge the filter residue onto the belt conveyor 23 and simultaneously output out of the machine.

Finally enter the fourth backwashing procedure: At this time, the water inlet valve 15 is opened and the water outlet valve is closed 17. The high-pressure backwash pump installed outside the starter sends the high-pressure backwash water from the water inlet pipe 14 into the first connection pipe 6, Then the high-pressure water in the first connection pipe 6 is synchronized from: one, from the several second water outlet holes 57 of the active filter plate 5 into its second water collecting cavity 54 and then from the holes of the third support orifice plate 55 respectively. The outflow flushes the filter residue in the mesh of the third filter screen 53; 2. It enters from the gap between the sleeve 19 and the hollow shaft 12 through the water collecting pan 59 and a plurality of third water outlet holes 60 into the first water collecting cavity 47. And then flow out from the holes in the first support orifice plate 46 and the second support orifice plate 49 on both sides of the first water collection cavity 47 to wash the first filter 45 and the second filter 50 respectively. Filter residue; 3. It flows from the center of the hollow shaft 12 through the sixth water outlet hole 81, the water collecting ditch 80 and the fifth water outlet hole 79 into the third water collecting cavity 66, and then from the fourth side of the third water collecting cavity 66. Outflow from each hole of the support orifice plate 65 and the fifth support orifice plate 68 flushes out the filter residue in the meshes of the fourth filter screen 64 and the fifth filter screen 69; 2. Enter the second connecting pipe 33 from the hollow shaft 12, and then flow into the fourth water collecting cavity 73 from the several fourth water outlet holes 76, and then flow out from the holes in the sixth support orifice plate 75 to wash the sixth. The filter residue in the mesh of the filter 77, and then the backwash water containing the filter residue washed out by each filter will flow down into the water collection tank 42 which has been set in the frame 21 below the pressure filter plates, and then set up outside the machine. The sewage pump is pumped back for treatment. This completes the entire process from resetting and waiting for pressure to the end of backwashing. This repeated operation enables the automatic high-pressure filter press of the present invention to achieve large output, high pressure, low water content in filter residue, and automatic backwashing of the filter screen. Blockage, high degree of automation, few wearing parts, wide range of applications, and energy-saving and efficient operation.

Claims

An automatic high-pressure filter press includes: a filter press cylinder (1), an active filter press plate (5), a movable passive filter plate (4), a fixed passive filter plate (3), and an end cap filter plate (2) ), The first hydraulic oil cylinder (9), the fourth hydraulic oil cylinder (32), the outlet pipe (18), the feeding pipe (31), the first connecting pipe (6), the second connecting pipe (33), and the frame ( 21); It is characterized in that the front and back ends of the cylindrical filter press cylinder (1) are provided with outer flanges and are fixed on the frame (21), and the filter press cylinder (1) is provided in order from front to back. Active filter plate (5), movable passive filter plate (4), fixed passive filter plate (3), end cap filter plate (2); a hollow shaft (12) is set in the center of the filter cylinder (1), A fixed passive filter plate (3) is fixed on the hollow shaft (12), and a sleeve (19) larger than its diameter is provided outside the hollow shaft (12). One end of the sleeve (19) and the movable passive filter plate (4) Connection, the other end of the sleeve (19) is provided with a plurality of second rollers (8) for self-alignment, and the second roller (8) is fixedly connected to the sleeve through the second roller shaft bracket and presents each other with the outer wall of the hollow shaft (12) Rolling connection, the rear end of the hollow shaft (12) is provided with a limiting plate (11) of the second roller (8); the hollow shaft (12) and the sleeve (19) The center of the active filter plate (5) extends into the first connecting pipe (6), and the other end of the hollow shaft (12) passes through the center of the end cover filter plate (2) into the second connecting pipe (33); One end of a connecting pipe (6) is fixedly connected with the active filter plate (5), and the other end is fixedly connected with the first hydraulic rod (10) of the first hydraulic oil cylinder (9) fixed on the frame (21); the second One end of the connecting pipe (33) is fixedly connected with the end cover pressure filter disc (2), and the other end is fixedly connected with the fourth hydraulic rod (34) of the fourth hydraulic oil cylinder (32) fixed on the frame (21).
The automatic high-pressure filter press according to claim 1, further comprising a chute bracket (27) and a third hydraulic oil cylinder (25) fixed on the frame (21), said chute bracket (27) It is fixed above the rear end of the pressure filter cylinder (1) and the fourth hydraulic oil cylinder (32), and a slag scraper holder (28) and a slag scraper are driven and arranged below the third hydraulic oil cylinder (25). Two ends of the bracket (28) are slidably connected with the chute bracket (27), and a plurality of slag scrapers (29) are arranged at the lower end of the squeegee holder (28).
The automatic high-pressure filter press according to claim 2, further comprising an automatic slag-discharging bucket (40), which is disposed below the slag-blade holder (28) and passes through a shaft sleeve The rotation is set on the frame (21), and the automatic slag discharge bucket (40) realizes a certain angle of rotation on the horizontal plane through the second hydraulic oil cylinder (22); a water collecting tank (42) is arranged below the automatic discharge bucket (40) A belt conveyor (23) is arranged outside the frame (21) below the automatic slag hopper (40).
The automatic high-pressure filter press according to claim 3, wherein the active filter plate (5) is provided with a first support plate (52) having a diameter smaller than that of the filter cylinder (1), and the first support plate (52) ) Is provided with a second water collecting cavity (54) and a plurality of second water outlet holes (57), a third supporting hole plate (55) and a third supporting hole plate (55) are provided in front of the second water collecting cavity (54). The front side is provided with a third filter screen (53), the third support orifice plate (55) and the periphery of the third filter screen (53) are fixedly connected to the first support plate (52), and the first support plate (52) and A plurality of second reinforcing posts (56) are provided in the second water collecting cavity (54) between the third supporting orifice plate (55); a first sealing ring (51) is provided on the outer periphery of the first supporting plate (52) and communicates with The filter press cylinder (1) is in a sliding connection, and a second sealing ring (58) is provided on the inner periphery of the first support plate (52) and is in sliding connection with the sleeve (19).
The automatic high-pressure filter press according to claim 4, characterized in that: the end support filter plate (2) is provided with a second support plate (71) having a diameter smaller than that of the filter filter cylinder (1), and the second support plate (71) 71) The upper part is provided with a feeding hole (72), the lower part is provided with a plurality of fourth water outlet holes (76), the second support plate (71) is provided with a fourth water collecting cavity (73), and the fourth water collecting cavity ( 73) A sixth support orifice plate (75) is provided in front, a sixth filter orifice (77) is provided in front of the sixth support orifice plate (75), and the sixth support orifice plate (75) and the periphery of the sixth filter orifice (77) Are fixedly connected with the second support plate (71) together, and a plurality of fourth reinforcing posts 74 are provided in the fourth water collecting cavity (73) between the second support plate (71) and the sixth support orifice plate (75), A fourth seal ring (70) is provided on the outer periphery of the second support plate (71) and is in sliding connection with the filter press cylinder (1), and a fifth seal ring (78) is provided on the inner periphery of the second support plate (71) and is in contact with The hollow shaft (12) is in a sliding connection.
The automatic high-pressure filter press according to claim 5, characterized in that: a fixed outer passive filter plate (3) is provided with a second outer supporting ring (63) having a diameter smaller than that of the filter filter cylinder (1), and an inner periphery is provided with The second inner support ring (82), the second inner support ring (82) is provided with a water collecting groove (80) and several fifth water outlet holes (79), and a hollow shaft (12) in the water collecting groove (80) A plurality of sixth water outlet holes (81) are arranged on the second inner support ring (82) and the hollow shaft (12). The second inner support ring (82) and the second outer support ring (63) are symmetrically installed. There are a fourth support orifice plate (65) and a fifth support orifice plate (68). A fourth filter mesh (64) is provided on the outside of the fourth support orifice plate (65). A fifth support orifice plate (68) is provided on the outside. The five filters (69) and their inner and outer edges are fixedly connected to the second inner support ring (82) and the second outer support ring (63); the fourth support orifice plate (65) and the fifth support orifice plate (68) is a third water collecting cavity (66), and the third water collecting cavity (66) is provided with a plurality of third reinforcing pillars supporting the fourth supporting orifice plate (65) and the fifth supporting orifice plate (68). (67).
The automatic high-pressure filter press according to claim 6, characterized in that: the movable passive filter plate (4) is provided with a first outer support ring (44) smaller than the filter cylinder (1) on the outer periphery, and a first filter ring (44) on the inner periphery. An inner support ring (61), the first inner support ring (61) is provided with a plurality of third water outlet holes (60) and a third seal ring (62) and is in sliding connection with the hollow shaft (12); the first inner support A first support orifice plate (46) and a second support orifice plate (49) are symmetrically installed between the ring (61) and the first outer support ring (44), and a first filter is provided outside the first support orifice plate (46). The mesh (45) and the second support orifice plate (49) are provided with a second filter screen (50) and its inner and outer edges together with the first inner support ring (61) and the first outer support ring (44). Fixed connection; the first water collecting cavity (47) between the first support orifice plate (46) and the second support orifice plate (49) is provided with a plurality of supporting first support orifice plates (46) and the second support orifice plate (49) 's first reinforcement column (48).
The automatic high-pressure filter press according to claim 7, characterized in that a first water outlet (13) is provided below the first connection pipe (6), and a three-way pipe (16) is provided below the first water outlet (13). The lower end of the three-way pipe (16) is provided with a water outlet pipe (18), and the water outlet pipe (18) is provided with a water outlet valve (17); the side of the three-way pipe (16) is provided with a water inlet pipe (14), and the water inlet pipe (14) ) Is provided with a water inlet valve (15); the upper part of the end cover filter plate (2) is provided with a feeding hole (72), and the feeding hole (72) is provided with a feeding tube (31) and a feeding tube (31) ) And the second support plate (71) are fixedly connected to each other, a feeding valve (30) is arranged on the feeding pipe (31); a first feeding port (36) is arranged below the fixed passive filter plate (3), and is movable A second feeding port (37) is arranged below the passive filter plate (4).
The automatic high-pressure filter press according to claim 8, characterized in that a plurality of self-aligning first rollers (7) are provided outside the casing (19), and the first rollers (7) are mounted on the first support plate. (52) On the shaft bracket of the first roller (7) fixedly connected to each other, the first roller (7) and the sleeve (19) are in a rolling connection with each other; a second connecting pipe ( 33) A plurality of self-aligning third rollers (35) are provided on the hollow shaft (12) protruding inside. The shaft bracket of the third roller (35) is fixedly connected to the hollow shaft (12). The third roller (35) It is in rolling connection with the second connecting pipe (33).
An automatic high-pressure filter press for filtering, slag-removing and backwashing method, which uses the automatic high-pressure filter press according to claim 9, is characterized in that the following procedures are cyclically performed when operating with this structure: resetting to be pressed Filtration procedure-pressure filtration procedure-slag discharge procedure-backwash procedure;

The procedure for resetting the filter to be pressed is: firstly synchronously starting the first hydraulic cylinder (9) to drive the first hydraulic rod (10) to pull back, and the fourth hydraulic cylinder (32) to drive the fourth hydraulic rod (34) to push forward; The active filter plate (5) in the filter cylinder (1) is retracted to the rear end position of the filter cylinder (1), and the end cover filter plate (2) enters the front of the filter cylinder (1) in a sealed state, which is fixed and passive. The pressure filter plate (3) and the movable passive filter plate (4) are pushed by the first roller shaft bracket, the second roller shaft bracket, the limit plate (11) and the third roller 35's shaft bracket, The filter cylinder (1) is positioned according to the set distance distribution, then the second hydraulic oil cylinder (22) is started to push the automatic slag hopper (40) into the frame (21), and the third hydraulic oil cylinder (25) is started to scrape The slag knife holder (28) resets the slag scraper (29) upward, and then closes the water inlet valve (15), and opens the water outlet valve (17) and the feed valve (30);

The filter press procedure is as follows: the feed pump set outside the machine is started to send the sewage or slurry to be processed from the feed pipe (31) through the feed hole (72) into the filter press cylinder (1), and then from The first feed port (36) and the second feed port (37) are fed into the cavities in the filter press cylinder (1). When the cavities in the filter press cylinder (1) are filled, the pressure in the cylinder increases to When the pump can no longer feed, close the feeding valve (30), start the first hydraulic oil cylinder (9), and drive the first hydraulic pressure rod (10) through the first connecting pipe (6) to the active filter plate (5) to the filter cylinder. (1) Inner top, at this time, the movable passive filter plate (4) and fixed passive filter plate (3) in the filter cylinder (1) are passively squeezed towards the end cover under the push of the liquid between them. The filter plate (2) is moved in the direction, and the distance between the filter plates is gradually reduced due to the gradual loss of filtered water. When the maximum pressure is set in the filter plate (1), the first hydraulic cylinder (9) is stopped. At this time, the material liquid between the filter plates is pressed into a cake with low water content. During the filter press process, the filtered water in each filter plate is discharged as follows: the active filter plate (5 The filtered water in) enters the third support orifice plate (55) from the third filter (53) to The two water collection chambers (54) flow into the first connection pipe (6) through several second water outlet holes (57); the filtered water of the movable passive pressure filter disc (4) is respectively provided by the first filter screen (45), the first The two filtering screens (50) enter the first water collecting cavity (47) through the first supporting orifice plate (46) and the second supporting orifice plate (49), and then pass through a plurality of third outlet holes (60) to collect water. The disc (59) flows into the gap between the sleeve (19) and the hollow shaft (12) and then flows into the first connecting pipe (6); the filtered water fixing the passive pressure filter disc (3) is passed through the fourth filter screen (64) The fifth filter screen (69) enters the third water collecting cavity (66) through the fourth supporting orifice plate (65) and the fifth supporting orifice plate (68), and then flows to the collecting water through several fifth outlet holes (79). The groove (80) flows into the hollow shaft (12) through a plurality of sixth water outlet holes (81), and then flows into the first connecting pipe (6); 77) Enter the fourth water collecting cavity (73) through the sixth supporting orifice plate (75), then flow into the second connecting pipe (33) through the fourth water outlet hole (76), and then flow into the hollow shaft (12) All the filtered water collected in the first connection pipe (6) and finally in the first connection pipe (6) flows into the outlet pipe (18) through the first outlet hole (13) provided below it. Outside the machine;

The slag unloading procedure is: synchronously starting the first hydraulic oil cylinder (9) and the fourth hydraulic oil cylinder (32) to push the pressure filter discs and the residue cake in the filter cylinder (1) through the first hydraulic rod (10). The pressure filter cylinder (1) moves in the front direction, and the end cover pressure filter disc (2) is pulled backward by the fourth hydraulic rod (34). At this time, the end cover pressure filter disc (2) passes the third roller (35). The shaft bracket blocks the hollow shaft (12), the fixed passive filter plate (3) and the movable passive filter plate (4) and pulls them all backward. When the active filter plate (5) is pushed to the front filter cylinder ( 1) At the time of opening, the first hydraulic oil cylinder (9) stops working. When the end cover pressure filter disc (2) moves backward to the set discharge position, the fourth hydraulic oil cylinder 32 stops working. At this time, due to the hollow shaft (12 ), The limiting plate (11) on the hollow shaft (12) pushes the sleeve (19) and the movable passive filter plate (4) to move together, so that the front end of the filter cylinder (1) and the fourth hydraulic oil cylinder ( 32) The distance between the pressure filter discs to remove the filter residue reaches the set slag discharge distance. At this time, the third hydraulic oil cylinder (25) is activated to drive the third hydraulic rod (26) to the slag scraper holder (28). ) And slag scraper (29), push down and stick to each filter The upper filter residue is scraped into the automatic inclined slag hopper 40 in the lower frame (21). After the filter residue is unloaded, the third hydraulic cylinder (25) then drives the third hydraulic rod (26) to drive the scraper holder (28). And the slag scraper (29) is reset upward, and then the second hydraulic oil cylinder (22) is started to rotate the automatic slag hopper (40) out of the outer belt conveyor (23) through the shaft (39), at this time the belt is started at the same time The conveyor (23) and the self-unloading device unload the filter residue onto the belt conveyor (23) and simultaneously output outside the machine;

The backwashing procedure is as follows: opening the water inlet valve (15), closing the water outlet valve (17), and starting a high-pressure backflush pump provided outside the machine to send high-pressure backflush water from the water inlet pipe (14) to the first connection pipe ( 6), and then the high-pressure water in the first connection pipe (6) is synchronized from: one, into the second water collecting cavity (54) from several second water outlet holes (57) of the active filter plate (5). Then flow out from the holes of the third support orifice plate (55) to wash the filter residue in the mesh of the third filter (53); 2. Enter from the gap between the sleeve (19) and the hollow shaft (12) Enter the first water collecting cavity (47) through the water collecting pan (59) and a plurality of third water outlet holes (60), and then respectively from the first support orifice plates (46) on both sides of the first water collecting cavity (47). And the outflow from each hole in the second support orifice plate (49) to flush the filter residue in the mesh of the first filter mesh (45) and the second filter mesh (50) respectively; 3. flowing from the center of the hollow shaft (12) through the first The six water outlet holes (81), the gutter (80), and the fifth water outlet hole (79) flow into the third water collection cavity (66), and then from the fourth support holes on both sides of the third water collection cavity (66). Out of the holes of the plate 65 and the fifth supporting orifice plate (68), the fourth filter (64) and The filter residue in the mesh of the fifth filter screen (69); 4. Enter the second connecting pipe (33) from the hollow shaft (12), and then flow into the fourth water collecting chamber from a number of fourth water outlet holes (76) ( 73), and then flow out from the holes in the sixth support orifice plate (75) to flush the filter residue in the mesh of the sixth filter (77), and then the backwash water containing the filter residue washed out by each filter is uniform. After flowing down into the water collecting tank (42) which has been set in the frame (21) under each pressure filter plate, it is pumped back for treatment by a sewage pump installed outside the machine.