CN2900120Y - Mud balling equipment - Google Patents

Abstract

A device for making pellets with ointment slurry, especially dewatered material such as sludge produced after sewage filtration, comprising a container (32) for temporarily placing the slurry and a concave cavity at the lower end of the container and having a blanking die hole Die (38), a certain vertical distance below the die is a moving placement plane, which is used to place the pellets produced in the blanking die hole, the container (32) and the die (38) installed on it, Arranged above a dryer conveyor belt (14) as a drying device on a laying surface, the position can be changed transversely to the conveying direction (x) of the dryer conveyor belt (14).

Description

Slurry pelletizing equipment

technical field

The utility model relates to a device for making pellets with ointment-like mud, especially dehydrated materials such as sludge produced after sewage filtration, which includes a container for temporarily placing the mud, and a lower end of the container with a blanking die hole. Die, a certain vertical distance below the die is a moving placement plane, which is used to place the pellets produced in the hole of the blanking die.

Background technique

According to the European patent document EP-A-0 638 356, at the outlet of the lower part of the mud receiving container having a funnel shape in cross section, two height-adjustable slide plates arranged on both sides of the side wall of the container are provided. These two slides can be placed on the horizontally movable perforated sheet to block the container outlet, prevent the mud from leaking from both sides, and guide the mud through the perforated sheet used as the die. The porous sheet has a perforated region and a non-porous closed region, each of the two regions having an area at least equal to the area of the container outlet. The die is connected to an independent drive, and the base structure of the die (including the two support bars) is connected to a transmission mechanism that performs an oscillating movement. Below the die part is an endless conveyor belt as a laying surface, which is stretched between two adjacent rollers to form a narrow strip and meets another conveyor belt.

Based on the knowledge of the current state of the art, the inventors aimed to improve this device and the corresponding method and avoid multiple changes of the TS content formed in the die from a paste-like and sticky slurry with a tendency to stick up to approx. 30% pellet structure. In addition, the drying process should be able to be performed essentially continuously, independent of periodic cleaning of the equipment.

Contents of the invention

The purpose of this utility model is to provide a kind of mud pelletizing equipment, which can make the drying process relatively continuous, and can prolong or even abolish the cleaning time interval.

According to the utility model, the container, together with the concave mold fixed on the container above the dryer conveyor belt of a set of drying equipment, can be preferentially moved horizontally to its conveying direction by means of a vehicle frame to change its position, especially Can be moved horizontally. The disc-shaped concave die set at the bottom of the shell of a similar cylindrical, especially tubular or cylindrical container can be replaced. It uses the mud column pressed against it to form pellets that meet the specifications, and the pellets break out of the concave cavity by their own weight. die, and directly fall onto the conveyor belt of the dryer; the effective die length (formed by the blanking die hole) along the conveying direction determines the width of the strip-shaped material pile on the conveyor belt of the dryer, according to the utility model Another feature of the dryer conveyor belt continues to run the above-mentioned pile width after passing the shell.

In addition, as one of the advantages, the die and its blanking die hole are equipped with a conveying device for conveying air or similar flow medium, which not only facilitates the formation of the pellets, but also helps to keep the die clean.

According to another feature of the utility model, a rotatable shaft is provided on the longitudinal axis of the shell of a similar cylinder, especially a tubular or cylindrical container shell, the shaft is preferably designed as hollow, and Compressed air or a rotating conduit of a similar flow medium is connected; the shaft is provided with at least one air outlet near the die.

In order to facilitate the separation of the pellets made of the mud column from the mud column and at the same time to facilitate the cleaning of the die, at least one separation process protrudes from the shaft with a blade which passes over the die when the shaft rotates.

In addition, in the cavity extension of the shaft, the blade should comprise an air channel (preferably radially) open to the outside as an air outlet for the flow medium.

It has proven to be advantageous for the shaft to be supported at one end in the die and at the other end on a stop of the housing. On the baffle, the shaft is sealed with a shaft seal, and a piece of sliding gasket is embedded under the shaft seal. In order to be able to support the shaft on the baffle, the diameter of the sliding spacer should be larger than the diameter of the shaft seal.

Inside the die, the shaft is supported by an axial pin. Like this, dividing mechanism (particularly blade) preferentially forms a structural unit with support pin, and one end of axle just is fixed on this structural unit. It has proven to be a good idea to provide this structural unit with a collar in which the shaft end is seated.

The design feature of the die is that the blanking die hole is located on the structural ring in the specially designed cylindrical shell die, wherein the blade is connected to the structural ring.

In order to simplify changing and cleaning of the die, the die should be detachable from the lower part of the container housing (for example in the area of the flange connection).

With the aid of a corresponding slurry pump, the dewatered slurry is forced through a flexible pipe or hose through the die. Through the above, the left/right rotation of the blade shaft arranged in front of the die performs extensive self-cleaning, the blade shaft is additionally equipped with a compressed air connection, which works periodically. The solid matter causing the blockage is crushed before the die, and then the blockage is removed with compressed air.

The above pelletizing equipment is used to make an air-permeable stockpile for drying by the conveyor belt dryer.

The concave mold moves above the conveyor belt of the dryer along with the shell carrying it and the mud, and moves across the conveying direction of the conveyor belt. The material pile is put on the conveyor belt of the dryer when the shell reciprocates. The pile can be adapted to any dryer belt width. The pellets made of mud in the die and subjected to the action of compressed air or flow medium (at a certain time interval if necessary) in the die are directly put on the conveyor belt of the dryer and conveyed in the dryer. The belt forms an air-permeable stockpile.

The advantage of this method is that the pasty (extremely sticky) sticky slurry is sent directly to the dryer conveyor belt after pelleting and must not be moved further. Furthermore, due to the self-cleaning action, the drying process can be carried out relatively continuously and the cleaning intervals can be extended or even eliminated.

Description of drawings

Can understand some other advantages, features and details of the utility model according to the following description of a preferred embodiment and the accompanying drawings; in the accompanying drawings:

Figure 1 is a schematic diagram of equipment for reproducing ointment mud pellets, including conveyor belt dryers and associated pelletizing devices;

Fig. 2 is the enlarged schematic view of the pelletizing device compared with Fig. 1;

Fig. 3 is an enlarged cross-sectional view along line III-III of Fig. 2 .

Detailed ways

In the tower support 10, above a guide dryer conveyor belt 14 passing through the drum 12 (a certain distance away from the conveyor belt), a guide device 16 is arranged, and the pelletizing device 18 can cross the dryer conveyor belt The width b of 14 shifts; the pelletizing device appears in Figure 1 in three different positions 18, 20; 18a, 20a; 18b, 20b.

There is a flexible pipeline 20 connected to the pelletizing device 18, the flexible pipeline 20 is designed as a port-shaped column, and the upper bend is suspended on a crane 24 that can move on the roof guide rail 22 parallel to the guide frame 16 . The other end of the pipeline 20 is connected to an elbow 26 of a bottom pipeline 27 of an eccentric screw pump 28 used as a mud pump. The eccentric screw pump 28 is located below a filter cake device 30 which takes the form of a feed shaft in which a filter cake F consisting of mud filtrate or the like, not shown in the figures, is located.

The pelletizing device 18 has a container 32 adopting a vertical shell 33, and a side handle 34 inclined forward at an inclination angle w, to which the pipe 20 is flanged via a rubber hose style mud delivery pipe 36.

Specially designed tubular shell 33, its inner diameter d can be taken as for example 100mm, its bottom is above the conveyer belt dryer or similar drying device not shown in the figure, the distance is e, and one serves as forming die downwards The disk that 38 uses is closed, and disk then is screwed on the bottom end flange 37 of shell 33 with bolt. Die 38 has an annulus with a hole 40, which in the selected example is about 10 mm in diameter.

As can be seen from Fig. 3, there are 8 holes or blanking die holes 40 on the structural ring K with a diameter of i, and the structural ring K surrounds the vertical central axis M of the shell 33, generally between the central axis M and Intermediate movement of the free surface of the die between the surrounding walls 35 of the cylindrical housing. The blade 42 can pass over the surface of the die.

The blade 42 protrudes radially and parallel to the die surface relative to the hollow shaft 44 on the central axis M, and the lower end of the hollow shaft 44 is inserted in a clamping sleeve 46 supporting the blade 42; the clamping sleeve 46 is connected with a shaft pin 48 as a support, and the shaft pin 48 is inserted in the concentric recess of the die 38 . The blade shaft 44 is upwardly supported on a baffle plate 50 of the housing 33 within the range of the shaft seal 52, and a sliding pad positioned on the collar 56 of the blade shaft 44 for upward support can be seen below the shaft seal 52 Sheet 54; the diameter of the sliding gasket 54 is larger than the diameter of the shaft seal 52, and the periphery of the sealing member 52 is connected with the sliding gasket 54.

At the upper end of the blade shaft 44, a compressed air rotation duct 58 must be seen, and below this rotation duct 58 is a motor 60 with a reduction gear for the left/right rotation of the blade shaft 44 (highlighted with symbols on one side) .

The pasty slurry S which has passed through the above-mentioned filter cake F is conveyed by means of an eccentric screw pump 28 through a pipe 20 to a container 32 where it then flows into a die 38 . In the shell 33, the formed mud column escapes downward in the hole or the blanking die hole 40, forming a worm-shaped pellet Q, and then breaks apart by its own weight, and falls onto the conveyor belt 14 of the dryer ; Form a pile Q ₁ on the surface 15 of the conveyor belt 14 , the height of which is indicated by h in FIG. 2 .

In order to uniformly form the pile Q ₁ on the entire dryer conveyor belt width b, the container 32 placed on the frame 62 is moved by a motor 60 (also capable of left/right rotation) with a reduction gear; since the frame 62 Wheels 64 are mounted on it, and the pelletizing device 18 can move along the slide rail 66 of the guide frame 16, across the conveying direction x of the conveyor belt 14 of the dryer, and move through a running line with a length n.

The displacement of the eccentric screw pump 28 and the speed of travel on the vehicle frame 62 determine the material layer height h of the pile _Q1 of the worm-shaped pellet Q; The diameter i) of K determines the bed width over which the dryer conveyor belt 14 is pulled forward rhythmically.

The blade 42 mentioned above is used for the self-cleaning of the die 38; as previously mentioned, the blade 42 is on the blade shaft 44, driven by its motor 60 with a reduction gear, next to the surface of the die, around the central axis M to Rotate left or right. As rotated, the blades 42 scrape sludge fractions from the holes of the die 38 or the holes 40 of the blank die. In addition, the compressed air can pass through the hollow blade shaft 44, and then reach the blade 42 through the rotating duct 58; outside open) air channel 43. The compressed air presses the sludge part (the pellet Q is the same), and sends it to the conveyor belt 14 of the dryer through the die 38 . The pile _Q1 thus formed on the dryer conveyor belt 14 is then guided into a subsequent drying process.

The lower part 32a of the housing 33, together with the die 38 fixedly connected thereto, can be detached quickly and easily from the rest of the housing 33 by means of the flange connection 70, for a cleaning, for example by hand. In addition, this method can also be used to replace another type of die 38, for example, a blanking die hole 40 with a different hole diameter.

In addition, the pin 48 of the blade 42 and blade shaft 44 is also in the replacement part 32a of the container 32; the mating die 38 (pin 48) is lubricated by the slurry to be treated; the lower end of the container does not require special seal.

Claims (22)

1. mud balling equipment, comprise a container of temporarily laying mud, and die that belongs to the container lower end and the blanking nib is arranged, the certain vertical distance in die below is the plane of laying of a motion, be used for being placed in the pelletizing that produces in the blanking nib, it is characterized in that, container (32) and the die (38) that is installed in above it, be arranged in a conduct and lay the top of baker conveyer belt (14) of the drying unit on plane, can change the position by horizontal throughput direction (x) facing to baker conveyer belt (14).

2. mud balling equipment according to claim 1, it is characterized in that, similar cylindric, the shell (33) of tubulose or cylindrical container (32) particularly, fixing a dismountable discoid die (38) in its lower end, the effective length (i) of die on throughput direction (x) roughly determines baker conveyer belt (14) to go up the width of bar shaped stockpile.

3. mud balling equipment according to claim 2 is characterized in that, baker conveyer belt (14) moves with the corresponding line-spacing of effective length (i) with removable die (38) on throughput direction (x).

4. mud balling equipment according to claim 1 and 2, it is characterized in that, a tube-like envelope (33) has at least one a side handle (34) and a vehicle frame (62), side handle (34) is connected with a slurry pipeline (36), vehicle frame (62) is arranged in a leading truck (16), and leading truck (16) crosses baker conveyer belt (14) with certain spacing.

5. mud balling equipment according to claim 1 is characterized in that, die (38) and blanking nib (40) thereof have disposed the accessory of carrying air or similar mobile medium.

6. mud balling equipment according to claim 5 is characterized in that, at regular intervals at interval, applies compressed air in mobile medium conveying equipment, has preset a cover cycle control circuit.

7. mud balling equipment according to claim 2 is characterized in that, is provided with a rotary axle (44) on the housing longitudinal axis (M) of cylinder-like shell (33).

8. mud balling equipment according to claim 7 is characterized in that, is designed to hollow shaft (44) and is connected with the rotary guide pipe (58) of compressed air or similar mobile medium, and on die (38) at least one air outlet slit is set.

9. mud balling equipment according to claim 7 is characterized in that, stretches out a division mechanism (42) at least from axle (44), can be handled through the die surface by axle.

10. mud balling equipment according to claim 9 is characterized in that, division mechanism (42) is a radially overhanging blade from the axle (44).

11. mud balling equipment according to claim 10 is characterized in that, blade (42) comprises an outwards open air duct (43), as the air outlet slit of the medium that flows.

12. mud balling equipment according to claim 7 is characterized in that, an end bearing of axle (44) is in die (38), and the other end is bearing on the baffle plate (50) of shell (33).

13. mud balling equipment according to claim 12 is characterized in that, axle (44) utilizes a pivot pin (48) to be bearing in the die (38).

14. mud balling equipment according to claim 13 is characterized in that, division mechanism, particularly blade (42) constitute a construction unit with a pivot pin (48), and an end of axle (44) is fixed on this construction unit.

15. mud balling equipment according to claim 14 is characterized in that, axle (44) is supported in the sleeve pipe (46) of construction unit (42,48).

16. mud balling equipment according to claim 12 is characterized in that, axle (44) is located to seal with a shaft seal (52) at baffle plate (50), and shaft seal (52) is supported below by a sliding shim (54).

17. mud balling equipment according to claim 16 is characterized in that, the diameter of sliding shim (54) is greater than the diameter of shaft seal (52).

18. mud balling equipment according to claim 7 is characterized in that, axle (44) and (or) vehicle frame (62) of container (32) be connected to can a left side/right rotation a back geared motor (60,60a) on.

19. mud balling equipment according to claim 2 is characterized in that, blanking nib (40) is arranged on the structure annulus (K) of die (38) of cylinder-like shell (33).

20. mud balling equipment according to claim 19 is characterized in that, blade (42) is inlaid on the structure annulus (K).

21. mud balling equipment according to claim 2 is characterized in that, die (38) can break away from container (32) with the bottom (33a) of shell (33).

22. mud balling equipment according to claim 1 is characterized in that, is arranged in baker conveyer belt (32) and goes up transportable container (32), is connected with the slush pump (28) of filter cake device (30) with a flexible duct (20).

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