JP2008261572A - Drying system for livestock excrement - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To solve problems in which, when granulated dry excrement and flesh excrement are mixed, moisture accompanying stirring is returned to a drying chamber and tends to deteriorate the drying state and in which the swift mixing enhances the mixing state but tends to increase dust during the stirring and the dust tends to be largely spread and scattered due to its fine shape. <P>SOLUTION: Excrement including moisture is held on a base, and drying of the excrement is promoted by sending air from the lower side. Then, the dried excrement is dropped in limited amount by a transfer means, so as to obtain fine dry excrement. The dried excrement is carried by a conveyor to inside of a treatment chamber having a wall face separated from a drying chamber and outside air. Flesh excrement is carried by a conveyor from a stable, and the excrement is forcedly stirred by a stirring means driven by a motor to obtain a mixture. Then, the mixture is transferred to the base in the drying chamber. The accumulated dry excrement is built up in a predetermined position via the treatment chamber again. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a drying system for drying livestock excreta, in particular poultry manure.

The following existing techniques are disclosed as a general technical background.
It does not have a complicated and controllable configuration for microbiologically treating excreta.
This is because when dry excrement is collected in the form of a lump that closely resembles a lump of soil, this is an extremely hard material. The driving force for rotating the shaft must be significantly higher in order to successfully break the mass and pass them through the gap located between the fingers or blades of two adjacent shafts. Such an increase in power is expensive in terms of energy.

  US-A-2679114 (Patent Document 1) relates to an apparatus and method for converting and composting fertilizer. The device consists of a conveyor that transports raw fertilizer to the top of the silo. The base of the silo is formed from two perforated and converging partitions with a passage extending between the partitions. A conveyor disposed in the chute is provided at the bottom of the passage. Extending above the conveyor are two parallel rotary shafts with blades. When the shaft is driven to rotate, some fertilizer is transferred onto the conveyor.

  Under pressure, air that may contain a lot of moisture is directed through the lower part of the silo into the fertilizer mass to prepare for its conversion. The air circulates behind the fertilizer and contributes to improving its drying or conversion.

  DE-A-2723581 (Patent Document 2) relates to a method and apparatus for aerobic decomposition of organic solids. The equipment consists of a device for pre-drying the material, a storage room, and a silo, and the base of the silo has a twin screw conveyor that produces a complete mixture of the pre-dried product and the dried product. Communicates.

  The mixture is then transferred via a vertical conveyor to a cracking reactor having a movable base. The mixture can be selectively led to a drying tower and the final product is stored in the aforementioned silo.

  It should be noted that the movable base, as in the above publication, is composed of a set of rotary shafts, around which a finger-like protrusion or blade is provided. This type of breathable movable base has serious drawbacks.

  Furthermore, when the shaft is at rest, i.e. not rotating, the gaps described above necessarily filter only the most fluid part of the dry material, which is undesirable.

  Finally, a livestock excrement drying apparatus is known through WO-A-97 / 02222 (Patent Document 3), and the base is composed of a movable and breathable drying chamber.

  The base is formed from a number of elements consisting of interlocking extrusions, but can be vibrated simultaneously to allow a portion of the waste to flow.

  This type of device is perfect for operation. However, vibration operations require considerable energy consumption.

The present invention overcomes the above-mentioned problems of the prior art and solves the following problems, can further efficiently dry the poultry manure, further improving the drying efficiency and considering the environment. It is to provide a drying system.
U.S. Pat.No. 2,679,114 German Open No.2723581 International Patent Publication No. WO97 / 02222

The same inventor proposed that the dried livestock excrement usually grows in size and is very hard and therefore difficult to handle, while the excrement is dried in a granular manner by a special technique, As a result, for example, granular dried excreta that can be freely conveyed even on a screw conveyor or the like can be obtained. In this drying system, it is essential to mix the granulated excrement with fresh excrement. However, there was a tendency for the moisture generated during stirring to return to the drying chamber and reduce the function of the drying chamber.
Further, as described above, the granulated excreta has features such as free transportation and easy stirring, but dust is easily generated during stirring. In addition, mixing with fresh excrement should be done as vigorously as possible to improve mixing, but on the other hand, dust tends to increase during agitation, because the dust is fine. It was easy to diffuse and scatter.
In addition, there has been a demand for a system for drying livestock excreta that can more efficiently mix the dried granulated excrement and the fresh excrement.

According to the features of claim 1 of the present invention,
A livestock excreta drying system that accepts a mixture of fresh excrement and dry excrement (M) as an object to be dried, the mixture being held by a base (6) and air (A The base is composed of a set of elements (60, 60 '), which form a means for holding the waste and periodically drain a portion of the waste And two sets of horizontal members (60, 60) that are knitted into two overlapping parallel planes (P1, P2). ') And these horizontal members (60, 60') are arranged so that the base (6) does not have a continuous obstacle in the vertical direction, and said transfer means (T; T1, T2) Two of T1, T2) Together are composed of a horizontal slide operable at least one slide between the faces (P1, P2), this sliding operation, the entire surface of the base is swept from one end to the other, below the plane (P ₂ In the drying system in which the excrement accumulated on the top of the horizontal member (60 ') is pushed and falls below the drying chamber by gravity to accumulate the dried excrement,
The dried excreta accumulated in the drying chamber is conveyed to the processing chamber by a conveyor into the processing chamber which is separated from the drying chamber by a wall surface and also from the outside air atmosphere. And a means for conveying fresh excrement conveyed from the barn to the processing chamber by a conveyor. In addition to these two conveying means, a motor-driven stirring means is provided in the processing chamber. The fresh excrement and the dried excrement conveyed by the above are stirred by the stirring means to form a mixture (M), and the mixture is again returned to the drying base (6) by a conveyor. In addition, a drying system for livestock excreta can be provided.

According to the second aspect of the present invention, in addition to the configuration of the first aspect,
The transported fresh excrement and the dried excrement are combined on the same conveyor and then stirred by the stirring means.

  According to a third aspect of the present invention, in addition to the configuration of the first aspect, a first arrangement in which the stirring means is provided with a portion to be stirred on the belt conveyor, and on the belt conveyor. It is characterized in that at least two arrangements of the second arrangement in which a portion to be stirred is arranged at a position deviated from the second arrangement can be selected.

  According to the structure defined in claim 1, livestock excrement is collected below the drying chamber as a fine dry object by the operation of the transfer means while being sufficiently dried on the base provided in the drying chamber. This dried object is conveyed by a conveyor, merges with fresh excrement in the processing chamber, and is sufficiently stirred. As a result, a properly mixed mixture can be obtained. This mixture is again fed into the drying chamber. Subsequent drying process becomes easy by fully stirring by the said process chamber. Moreover, even if it fully stirs, the moisture and dust which generate | occur | produce in a process chamber do not directly enter into a drying chamber. Further, moisture and dust are not directly released to the atmosphere of the outside air. Therefore, it is possible to obtain a mixture that can be sufficiently stirred more than ever and is suitable for the drying process.

  According to the configuration defined in claim 2, the transported fresh excrement and the dried excrement are mixed on the same conveyor and then mixed by the stirring means. Therefore, when fresh excrement enters the processing chamber, it is covered with the excretion that is dried before stirring, and as a result, moisture and odor are less likely to be emitted in the processing chamber. Moreover, stirring efficiency is also good by stirring after joining.

  According to the configuration defined in claim 3, the first arrangement enables the stirring means to perform the stirring work on the conveyor, and when the stirring is unnecessary, the flow of the conveyor The second arrangement can be changed so that the stirring means does not become a barrier. That is, the excrement on the conveyor can be moved smoothly by moving the stirring means existing on the conveyor to the outside of the conveyor.

An embodiment of the present invention will be described below with reference to the accompanying drawings.
FIG. 1 is an explanatory view showing an outline of an apparatus including a drying chamber according to the present invention. The upper and lower drawings are cut for convenience of drawing, but the alternate long and short dash lines in the drawing are continuous with each other.
FIG. 2 is a side view of the means enabling the supply of waste to the drying chamber according to the invention, the base being cut through a vertical vertical plane.
FIG. 3 is a partial top view of the horizontal member constituting the air-permeable base of the drying chamber.
FIG. 4 is a simplified top view of the drying chamber with the waste supply means.
FIG. 5 is a top view of the means for driving the movable slide provided in the drying chamber.
FIG. 6 is a schematic top view of the slide, drive cable, and return pulley.
FIG. 7 is a detailed view of the pulley and the drive cable.
FIG. 8 is a side view of the conveying means for supplying excrement to a drying chamber provided with a set of flattened finger projections.
FIG. 9 is a detailed view of one finger projection in the retracted position.
FIG. 10 is a partial cross-sectional perspective view drawn in the center of the processing chamber R in FIG. 1, and the screw 30 is in the first arrangement. Further, a partially broken portion is provided so that the inside of the conveyor can be easily understood, and a broken portion is also provided so that a part of the wall surface can be seen outside.
FIG. 11 is a view similar to FIG. 10 in which the screw 30 is changed to the second arrangement, and the viewpoint position has moved to the upper left. In the figure, it is drawn without a broken portion. In addition, the code | symbol shown on the wall surface is the code | symbol represented from the positional relationship of drawing, WF is a front side wall surface, WB is a back side wall surface, WR is a right side wall surface, WL is a left side wall surface, WT is a top side wall surface, WU is a bottom surface. Each side wall surface is shown. In FIG. 10, the reference numerals corresponding to these wall surfaces are omitted.
FIG. 12 is an enlarged perspective view of the screw 30.
FIG. 13 is a reference perspective view showing a state in which the cover portion of each conveyor in FIG. 10 is removed.

The apparatus depicted in FIG. 1 includes a drying chamber 1, a processing chamber R, an Archimedes screw conveyor 2, a belt conveyor 3, a belt conveyor α, and a fresh waste feed arranged to feed the waste into the belt conveyor 3. Consists of a conveyor B and air blowing means A into the drying chamber 1. That is, the feed conveyor B conveys excrement collected by the defecation belt in the poultry house toward the processing chamber R. The belt conveyor 3 is connected so that fresh excrement feed conveyor B and excrement can be conveyed.
On the other hand, the lower part of the drying chamber 1 is provided with a receiving pit 8 for the dried excrement S, and the upstream end of the Archimedes screw conveyor 2 is inclined and positioned therein. The other end side of the Archimedes screw conveyor 2 is connected to an intermediate point of the belt conveyor 3 via a chute 300.

A switching screw 30 is provided downstream from the joining position of the belt conveyor 3 with the chute 300.
The screw 30 can be used by switching between two types of angles, a first angle and a second angle (details will be described later). In FIG. 1, the first angle is the first angle. Further, by rotating the screw 30, the fresh excrement and the dry excrement placed on the belt conveyor 3 are agitated, and the resulting mixture is transferred to the belt conveyor α by the transfer force of the screw 30. Move by. The moved mixture then moves from the processing chamber R to the drying chamber 1 along the flow of the belt conveyor α, and the mixture is discharged from the output side end of the belt conveyor α. The discharged mixture is placed on a moving belt conveyor 4 disposed below the mixture.

Subsequent drying of the mixture takes place in the base portion. Its basic configuration is as follows.
When viewed from the side, the horizontal members are arranged in staggered rows, the ends of the upper planar horizontal members partially overlapping the lower planar horizontal members;
The upper planar horizontal member is perforated;
The drying chamber has two rectangular slides, the width of which is equal to half the width of the base, the two slides being movable in opposite directions;
The means for driving the slide consists of a first cable and a second cable, the first cable being connected to the lateral ends of two slides directed from the exact same side, Passes over a set of pulleys, at least one of which is a drive pulley, and the second cable connects to the lateral ends of the two slides opposite the first cable, which cable Passing one of the return pulleys, thus driving the drive pulley moves one slide in one direction while the second slide moves in the opposite direction;
They are configured to always put both ends of the first cable under tension; the first cable is connected to the first slide and the second slide, respectively;
It has a longitudinally movable conveying means and is capable of receiving the mixture and distributing it uniformly on the base;
The conveying means has a set of downwardly pointing fingers, which can flatten the layer of the discharged mixture on the base;
The set of finger projections can be retracted at the end of the drying chamber;
Next, how the dried excrement moves to the deposit S will be described.
The fresh excrement scheduled to be introduced from the poultry house is stopped with respect to the belt conveyor 3 scheduled to introduce fresh excrement into the processing chamber. For example, the introduction of fresh excrement is stopped by stopping the fresh excrement feed conveyor B. On the other hand, the belt conveyor 3 is normally operated. Further, the Archimedes screw conveyor 2 is also operated normally, whereby dried excreta is introduced to the intermediate point of the belt conveyor 3 through the chute 300. Moreover, the screw 30 arrange | positioned downstream from the position of the chute | shoot 300 of the belt conveyor 3 is arrange | positioned at the 2nd angle mentioned later. By doing so, the dried excrement is discharged to the accumulation S outside the processing chamber R along the flow of the belt conveyor 3.
In addition, it is possible to omit this fresh excrement feed conveyor B by extending the belt conveyor 3 to the vicinity of the defecation belt in the cage row. In that case, in order to move the dried excrement to the accumulation S, the introduction of fresh excrement is stopped by stopping the defecation belt in the cage row in the poultry house. The extended belt conveyor 3 is not stopped, but is allowed to receive the dried waste, and thereafter is carried to the deposition S in the above-described flow.

  By the way, the drying chamber 1 has a shape of an elongated right-angled parallelepiped and opens at the top. In its upper part, adjacent to one of the vertical vertical walls, a moving belt conveyor 4 is provided, the upper and lower belts extending horizontally and parallel to each other.

  This conveyor has a single direction of rotation; this direction is that with reference to FIG. 1, the upper belt moves from left to right. The upstream end thereof is slightly placed outside the drying chamber 1 to receive the mixture from the downstream end of the belt conveyor α.

As shown in FIG. 4, the conveyor 4 occupies a very small part of the width of the drying chamber.
The drying chamber is also provided with a movable conveying means 5 in the form of a casing in its upper part, which is longitudinally driven by rollers 55 placed in a guide passage provided in the vertical wall of the drying chamber. The motion of translational movement is guided.

  This conveying means comprises a scraper blade 51 placed on a belt above the conveyor 4. It also comprises an Archimedes screw 50 having horizontal and transverse axes of rotation, which lies in a plane located below the plane of the belt below the conveyor 4. The bottom of the container in which it operates is partially open.

  As will be seen later, feces received by the conveyor 4 are rubbed by the blades 51, discharged into the conveying means 5 and distributed over the entire width of the drying chamber by the screws 50.

  Electrical or electronic means (not shown), for example with a photocell, make it possible to automatically advance the conveying means as soon as the presence of waste is detected in the Archimedes screw.

The base of the drying chamber 1 is usually designated by a reference numeral 6 and is stored in a rectangle.
It is composed of two sets of horizontal members 60 60 ', are arranged horizontally and are organized as two overlapping parallel planes P ₁ and P _2. The arrangement of the horizontal members is such that the base 6 does not have a continuous obstacle in the vertical direction. In other words, this means giving the impression that the base is composed of one and only one continuous plate, as can be seen above or below. The projection of the base on the horizontal plane thus forms a continuous appearance (missing openings).

The horizontal member is generally flat, not very thick, and has a rectangular portion. They are for example made of metal.
As shown in more detail in FIGS. 2 and 3, the horizontal members 60 in the upper plane P ₁ partially cover their horizontal ends 601 over the horizontal member 60 ′ in the lower plane P _2. Are arranged as follows.

The horizontal member 60 on the upper plane P ₁ has a rectangular opening 600 arranged in the lateral direction. The importance of such features is explained later in the detailed description.
There is at least one horizontally movable slide T in the space dividing the _two planes P ₁ and P ₂ of the horizontal members 60 and 60 ′. This is a rectangular plate with a small thickness and its width matches the width of the base. As will be seen below, this slide has the function of pushing the waste accumulated on the lower horizontal member 60 'in order to remove the waste outside the drying chamber.

It can sweep the entire surface of the base from one end to the other.
In the embodiment of FIG. 6 corresponding to one particularly advantageous problem-solving means, the drying chamber has two slides T ₁ and T ₂ in the form of rectangular plates, the width of which is approximately the width of the drying chamber. Equivalent to half.
These slides are provided with means that allow a longitudinal translational movement between the two planes of the horizontal member, one moving in one direction and the other in the opposite direction.
To do this, each slide is attached by means of one of its lateral faces to the end of the first cable 92 which cooperates with a set of return pulleys, usually having the symbol 9.

More precisely, referring to FIG. 5, a master pulley 90 is arranged on the central axis in the vertical direction of the drying chamber, and its rotating shaft is arranged vertically and is driven by means comprising a motor (not shown). This is a grooved pulley and conveniently has a trapezoidal side. This pulley is associated with two auxiliary pulleys 90A and 90B, and the progression of the cable 92 across these three pulleys gives an approximate Greek letter omega (Ω) shape.
The system also includes a second pair of return pulleys or corner pulleys 91 are arranged respectively substantially along the longitudinal central axis of the slide T ₁ and T _2.
With respect to the lateral surface of the slide opposite to the front, a second cable 93 associated with a pair of return pulleys or corner pulleys 94 arranged along the longitudinal central axis of slides T ₁ and T ₂ is connected. is doing.
Four corner pulleys 91 and 94 are arranged at the corners of an imaginary rectangle, and slides are driven along their large sides. It should be understood that driving the pulley 90 in one direction or the other will cause the slide T ₁ to move in one direction and simultaneously move the slide T ₂ in the opposite direction.

  Two pulleys 90A and 90B are fixed to the clamps as shown in FIG. 7 in order to avoid sudden pulling in operation due to loose or loose ends of the cable 92 corresponding to a slide not shown. A measure is taken that is attached and fixed to the master pulley 90 itself.

Thus, depending on the force acting on the cable, the set of pulleys 90, 90A, 90B adapts to the direction of the so-called slack cable end so as to place the cable under tension.
This system can eliminate the need for continuous monitoring of the correct operation of the system.

Of course, when the slides T ₁ and T ₂ reach one end of the drying chamber 1, the motor for driving the pulley 90 is controlled so that the rotation direction is reversed. To do this, an end point detector can be used.
Of course, the cable material must be strong enough. They may be, for example, plastic-coated steel cables.
Referring to FIG. 8, this shows the excrement supply and transport means, which is provided with a swinging vertical arm 54 at its front portion and a lower end thereof with a set of bent finger projections 52. The finger-like projection 52 is directed toward the base, and is directed toward the excrement at the corner.

The function of these finger-like projections is to distribute excrement uniformly on one surface of the horizontal member so that the excretion can be prevented from accumulating on the upper surface of the horizontal member as the lower plane is damaged. It is to be.
As shown in FIG. 9, this finger projection system is provided at the end 10 of the drying chamber so as to swing with respect to the connection portion 53 so that the finger projection system retracts. This allows the transport means 5 to move conveniently to the base of the drying chamber without being disturbed by the finger projections.

  Underneath the base 6 is a known type of scraper system 7 which, as will be explained later, returns dry waste that has passed through the breathable base 6 back to the pit 8. Yes. In certain embodiments, multiple scrapers can be provided.

Finally, the device comprises means for taking in air A, for example from a breeding house placed close to the device.
This air is taken from below the base and is passed through the base from the bottom to the top, for example by means of a fan V.

The method of using the apparatus and drying chamber of the present invention will be described with reference to the accompanying drawings.
In a preliminary step, fresh excreta, such as feces, is mixed with dry feces in order to obtain a loose and loose mixture. Normally, fresh excrement tends to be agglomerated, and when it becomes agglomerated, air permeability is also impaired, and it tends to be an inconvenient shape for drying. In contrast, however, fresh feces, which previously had a tendency to become semi-fluids that were difficult to handle and process, were actively mixed with dry and fresh excrement as described above. It is possible to obtain a product (mixture) that is airy and loose, that is, easy to handle. The mixture M thus produced is transferred to the upper part of the drying chamber via the conveyor α.

  A complete mixture of these two products is prepared by stirring with a screw 30 provided on the conveyor 3, and after stirring, it falls and reaches the belt conveyor α. By this step, not only stirring but also air is sufficiently contained. However, dust is also a process that tends to occur.

  Due to the movement of the conveying means 5 associated with the belt 4, the mixture is discharged and transferred onto the base 6 inside the drying chamber. As a guide, the mixture M is composed of a dry product, for example, with a moisture content of about 50% per unit weight.

Prior to discharge, the means for blowing the air A is started, so that the air is generated in the drying chamber 1 and preferentially passes through the space located between the horizontal members 60 and 60 '. Part of the air also flows out by passing through the opening 600 of the horizontal member 60.
As it progresses from the base of the drying chamber to the top, the air has a lot of moisture and can be up to 95% humidity, but over time, the fecal mixture M can gradually dry out.

Usually, the layer of the mixture closest to the base 6 is dried first.
Periodically, the motor of the pulley 90 is activated so that the slides T ₁ and T ₂ perform longitudinal movements in opposite directions between the two planes 60 and 60 ′ of the horizontal member.
During this operation, a part of the dried excrement accumulated at the top of the horizontal member 60 'is pushed down by gravity onto the ground existing in the lower part of the drying chamber.
The presence of the rectangular hole 600 in the horizontal member of the upper plane P ₁ has the purpose of speeding up the drying of the faeces that have accumulated there, in this area the air through which the faeces pass preferentially. It is because it does not have the flow of A.
A part of feces is transferred through the air-permeable base 6 to form a fecal cone on the upper part of the plane above the horizontal member 6. In order to prevent this phenomenon, the conveying means 5 is provided with finger-like projections 52 for flattening. In this way, the fecal layer on the base 6 is continuously flattened.
In order to transfer the dried feces into the receiving pit 8, the scraper 7 is periodically started by a cable system. Here, they are collected by the Archimedes screw conveyor 2 and transferred to the deposit S for subsequent use or partially mixed with freshly arrived fresh feces.
It is quite clear that the entire process is carried out continuously and that some of the dried feces are periodically removed from the drying chamber. Means enabling automatic measurement of fecal humidity measurement are implemented just above the movable base.

  In one embodiment, although not shown, the slide is formed from a frame constructed by welding four extruded parts, ie, two longitudinal extrusions and two lateral extrusions, The separated internal space is empty.

  In this case, it is the vertical surfaces of the two lateral extrudates that push the waste accumulated in the horizontal member 60 'below the base 6. Preferably, the spacing between the two lateral extrusions is determined to be greater than the spacing between two adjacent horizontal members. For example, it is 75 cm and the distance between two horizontal members is 50 cm. Thus, when one extrudate pushes the waste, the other extrudate does not work, and vice versa. This makes it possible to define the range of power required to drive the slide.

Assuming a slide width of 2 meters, each extrusion moves about 1 m ² of surface area feces (0.5 m × 2 m) each time the horizontal member is “swept”.
The spacing between the two planes of the horizontal member is, for example, on the order of 25 mm.
Therefore, the amount of dry excrement removed each time the slide passes is not very large.

Thus, the technique according to the present invention uses a simple means and consumes little energy, with a constant, but not very high, uniform dry stool layer, i.e. the level of moisture is completely the same. Makes it possible to collect things.
In addition, to perform this task, it is necessary to develop a traction for cable 92 on the order of 400 kg, which corresponds to a power on the order of 750 watts.
If the base surface area is on the order of 200 m ² and it is necessary to move 200 slides each capable of sweeping a surface area of 1 m ² , the corresponding power revealed is 150 kW (0.750 x 200) .

While the present invention has been described with respect to poultry manure as an example, other types of excreta can be processed.
Next, the detail of the structure of the conveyor in the process chamber R is demonstrated with reference to FIG.

As described above, a total of three conveyors pass through the processing chamber R. One end of the belt conveyor 3 protrudes outward through the wall surface of the processing chamber R on the side indicated by “← B” in the processing chamber R, and communicates with the fresh excrement feed conveyor B. The feed conveyor B further includes a structure for receiving excrement discharged from a defecation belt of an adjacent chicken raising system (not shown). The belt conveyor 3 and the feed conveyor B can be configured with a single belt conveyor depending on the installation environment. The belt conveyor 3 having such an installation environment is provided with a cover 3a up to the center position in the processing chamber R.
The cover 3a is further joined continuously with the chute 300, and the chute 300 and the cover are continuous with the internal structure. The cover 3a terminates at a position where it is joined to the chute 300, and at the downstream position in the flow of the belt conveyor 3, the cover 3a is interrupted and the upper side is open. Further, the side wall portion (the rising portion 3c) of the cover 3a is also lowered to make a wide open area 3b.
Now, in this open area 3b, the screw 30 provided for switching is installed. In FIG. 10, the screw 30 is at a first angle. When the screw 30 provided at the first angle is rotated, the excrement that has arrived at the open area 3b moves in a direction substantially perpendicular to the belt conveyor 3 and falls. The fallen excrement is received on a belt conveyor α provided therebelow. The belt conveyor α is provided with a cover αa at a part of the downstream side, but the cover is not provided at the position where the fallen excrement is received. At the receiving position, a receiving hopper can be installed as desired. By the way, the chute 300 is connected to the upper position (that is, the downstream portion) of the Archimedes screw conveyor 2 for transporting the dried excrement from the drying chamber 1, and the dried excrement is moved upward by the rotation of the screw. When it is carried in the direction and reaches the position of the chute 300, it falls from there and is placed on the belt conveyor 3. Here, in a situation where the feed conveyor B is in an operating state, fresh excrement is carried from the adjacent chicken farming system, is delivered to the belt conveyor 3, and is raised to the position of the chute 300. The conveying force of the Archimedes screw conveyor 2 is adjusted by changing the number of revolutions according to the level of excrement, and an appropriate amount of dried excrement is placed from the chute 300. In this way, when a proper proportion of fresh excrement and dry excrement rise while being placed on the belt conveyor 3, they reach the position of the screw 30 described above, and by rotation of the screw 30, While excrement is mixed, it moves and falls onto the belt conveyor α provided below. With the stirring at this time, the arrangement portion is sufficiently mixed, but at the same time, it is scattered as dust in the same atmosphere. However, as described above, the processing chamber R is separated by a wall so that the scattered dust does not go directly to the atmosphere of the outside air. By providing this environment, a well-stirred mixture is obtained. Now, the sufficiently stirred mixture is returned to a predetermined position in the drying chamber 1 via the belt conveyor α and dried again.

Next, a process of depositing the excrement subjected to the drying process outside the drying chamber 1 and the processing chamber R will be described with reference to FIG.
This figure is a drawing of the same components as in FIG. 10, and is drawn with the viewpoint slightly changed slightly to the left. Moreover, although it is the same structure, the screw 30 is rotated 90 degree | times with respect to the state of FIG. 10, and is arrange | positioned in the 2nd angle. This rotation is achieved by rotating the entire screw about the column 31 that rotatably supports the screw. Reference numeral 32 denotes a motor that applies rotational driving to the screw portion. Now, when it arrange | positions at said 2nd angle, regardless of the presence or absence of the operation | movement of the said motor 32, the movement of the mixing and movement of excrement will be lost. This is because the screw has been repositioned at a position off the belt conveyor 3.

  In such a state, by stopping the fresh excrement feed conveyor B, the new excrement is stopped from coming to the belt conveyor 3 (or the feces belt in the poultry house is removed). Stop). On the other hand, the excrement dried from the drying chamber 1 is made to flow by operating the Archimedes screw conveyor 2 and is placed on the belt conveyor 3 through the chute 300. The belt conveyor 3 continues to execute the state of conveying from the lower side to the upper side as in FIG. Moreover, since the screw 30 has taken the 2nd arrangement | positioning as above-mentioned, the dry excrement mounted on the belt conveyor 3 flows up as it is, passes across the wall surface of the process chamber R, and passes. The belt conveyor 3 is naturally dropped from the front end portion of the belt conveyor 3. The state of being deposited by being naturally dropped is the deposit S. In this way, the desired dry excreta can be obtained in a deposited state at the desired location.

  Finally, details of the screw 30 and modified embodiments will be described. FIG. 12 is an enlarged view of the screw 30, and a cover portion 33 that is not disclosed in FIGS. 10 and 11 is attached. This cover is a scattering prevention cover that minimizes dust and the like scattered upward when the excrement dried by the screw 30 and fresh excretion with high humidity are vigorously stirred. Further, as described above, the screw 30 is rotated about the support column 31 as a central axis to achieve two arrangements. However, if desired, the screw 30, the motor 32, and the cover 33 are generally attached to the support column 31. By moving up and down, it is possible to achieve two forms. In this case, the state in which the belt conveyor 3 is approached can be the first arrangement, and the state in which the position of the screw 30 is raised to the state in which the excrement placed on the belt conveyor 3 does not come into contact is second. It can be arranged.

  FIG. 13 is a reference perspective view showing a state in which the cover portion of each conveyor in FIG. 10 is removed.

FIG. 2 is a highly schematic illustration of an apparatus comprising a drying chamber according to the invention, showing the different elements making up it, the lower part of the figure being generally continuous with the upper part. FIG. 4 is a side view of a means for enabling the supply of excrement to a drying chamber according to the present invention, the base being cut through a vertical vertical surface. It is a partial top view of the horizontal member which comprises the base which has the air permeability of a drying chamber. It is the simplified top view of the drying chamber provided with the excrement supply means. It is a top view of the means which drives the movable slide with which the drying chamber was equipped. It is a schematic top view of a slide, a drive cable, and a return pulley. It is detail drawing of a pulley and a drive cable. It is a side view with the conveyance means for supplying excrement to the drying room provided with a set of flattened finger-like projections. It is detail drawing of one finger-like protrusion in the retracted position. FIG. 2 is a partial cross-sectional perspective view drawn in the center of the processing chamber R in FIG. 1, and the screw 30 is in a first arrangement. It is the same figure as FIG. 10 which changed the screw 30 to the 2nd arrangement | positioning, and the viewpoint position has moved to the upper left. Enlarged perspective view of screw 30 It is the reference perspective view which showed the state which removed the cover part of each conveyor in FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Drying chamber 2 Archimedes screw conveyor 3 Belt conveyor alpha belt conveyor 5 Transportation means 6 Base
30 screw (mixing means)
52 Finger projection
60, 60 'Horizontal member (element)
90 Drive pulley
92 First cable
93 Second cable
94 Return pulley
601 End A Air M Mixture P ₁ , P ₂ plane T, T ₁ , T ₂ slide (transfer means)
V Blowing means S Dry excrement (sediment)
R processing room

Claims (3)

A livestock excreta drying system that accepts a mixture of fresh excrement and dry excrement (M) as an object to be dried, the mixture being retained by a base (6) and air (A) The base is composed of a set of elements (60, 60 '), which form a means for holding the waste and periodically drain a portion of the waste. Two sets of horizontal members (60, 60 ′) provided with transfer means (T; T1, T2) for urging the drop downward, the elements being knitted into two superimposed parallel planes (P1, P2) These horizontal members (60, 60 ') are arranged such that the base (6) does not have a continuous obstacle in the vertical direction, and the transfer means (T; T1, T2) are horizontal members (T; 2 flats consisting of T1, T2) (P1, P2) together it is composed of horizontally sliding operable at least one slide between, this sliding operation, the entire surface of the base is swept from one end to the other, below the plane (P ₂₎ In the drying system, the excrement accumulated on the top of the horizontal member (60 ') is pushed and falls below the drying chamber by gravity to accumulate the dried excrement.
A processing chamber (R) configured to be separated from the drying chamber by a wall surface and also from an atmosphere of the outside air by a wall surface is provided, and the dried excrement accumulated in the drying chamber is placed in the processing chamber. A means for conveying the waste into the processing chamber is provided by a conveyor, a means for conveying fresh excrement conveyed from the barn to the processing chamber by a conveyor is provided, and in addition to these two conveying means, a motor-driven stirring means is provided. The fresh excrement transported by these transport means and the dried excrement are stirred by the stirring means to obtain a mixture (M), and the obtained mixture is again conveyed by the conveyor. A system for drying livestock excreta, which is returned to the drying base (6).   2. The livestock excrement drying system according to claim 1, wherein the fresh excrement conveyed and the dried excrement merge on the same conveyor and then agitated by the agitating means.   At least two of the first arrangement in which the agitating means is arranged on the belt conveyor and the agitating part is arranged at a position off the belt conveyor. 2. The livestock excreta drying system of claim 1 wherein one arrangement is selectable.

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