JP2002086102A - Method of treating ham residue - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a method of treating ham residue capable of obtaining a substitute fuel using ham residue wasted in a ham factory. SOLUTION: Water portion originating from the ham residue is removed by holding airtightly the ham residue and a combustible adsorbent for adsorbing oil portion originating from the ham residue in a can body capable of stirring and rotating, sucking the inside of the can body to reduce the pressure, keeping at a temperature, at which the oil portion originating from the ham residue is melted, and supplying the outside air by to the ham residue to keep the inside of the can body in an equilibrium state from the pressure reducing state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for treating ham residue by using ham residue discarded in a ham factory to obtain a substitute fuel.

[0002]

2. Description of the Related Art Conventionally, regarding an apparatus for fermenting and drying a relatively high water content raw material such as sludge, livestock manure, or the like, to compost (compost), the applicant of the present invention has disclosed a Japanese Utility Model Application No. 58-42140.
No. JP-A-58-204893;
Many proposals such as No. 9 have been made. The technologies according to these proposals have each produced significant effects.

[0003] By the way, with respect to the treatment and advanced utilization of waste, what matters in the present invention is ham residues discarded during ham production. When producing ham, a large amount of meat that has not become a product is discarded. For example, after purchasing imported meat or domestically produced meat, fat and meat are processed to produce ham with less fat. For this reason, considerable fat must be discarded. In addition, the processing of returned expired products has to be discarded.

A ham residue discarded in such a ham manufacturing plant has a water content of 60% or more, and a solid content of an oil content of 40% or more, a crude protein of 30% or more, and a salt concentration of 30% or more. It is overwhelmingly higher than normal meat (sales concentration of product ham is 6 g / kg).

[0005] For this reason, ham residues are hardly used as feed for compost, livestock and fish. For example, when producing oil cake powder fertilizer, composting cannot be performed unless the oil content is 10% or less. Therefore, when composting, it was boiled and dehydrated and dried to an oil content of 5% or less, and at this time, the salt content was also reduced at the same time. In addition, salt contained in ham has been a problem in feed for livestock and fish.

Accordingly, the following steps are currently performed for the treatment of ham residues. 1. The ham residue is steamed or boiled in boiling water and boiled. This reduces oil and salt content. 2. After boiling, the ham residue is dewatered to separate the solid content from oil and moisture. Solids are reused as raw materials for compost. 3. Separate oil and water (including suspended matter) and reuse the oil as fuel. 4. BOD and COD in water are reduced by water treatment and discharged.

[0007]

However, the processing cost of the above-mentioned ham residue involves a large number of steps, requires various apparatuses, and the cost is enormous. In addition, ham residues are easily rotted and must be stored under low-temperature conditions until processing.

SUMMARY OF THE INVENTION The present invention has been made for the purpose of obtaining a processing method which considers reuse from a completely different viewpoint from the conventional processing of ham residue, and uses a ham residue discarded in a ham factory. We propose a method of treating ham residue that can obtain a substitute fuel.

[0009]

According to a first aspect of the present invention, there is provided a method for treating ham residue, wherein the ham residue and a combustible adsorbent for adsorbing oil derived from the ham residue can be rotated by stirring. The inside of the can is kept airtight, the inside of the can is sucked to be in a reduced pressure state, the inside of the can is maintained at a temperature at which oil derived from ham residue is melted, and outside air is supplied to the ham residue to supply the can body. This is to remove the water derived from the ham residue by maintaining the internal reduced pressure state in an equilibrium state.

In the method for treating ham residue according to the second aspect of the present invention, the adsorbent according to the first aspect is selected from sawdust, bran, wood chip, coffee bean residue, and pulp material cake. Or more.

In the method for treating ham residue according to the third aspect of the present invention, the conditions for treating the inside of the can according to the first or second aspect are as follows. C. to 100.degree.

The method for treating ham residue according to the invention described in claim 4 further comprises a step of molding the ham residue from which water derived from the ham residue has been removed and an adsorbent into pellets.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS In the present invention, a ham residue and a combustible adsorbent for adsorbing oil derived from the ham residue are kept airtight inside a rotatable can body, and the inside of the can body is sucked. To maintain the temperature at which the oil content derived from the ham residue is melted, and supply outside air to the ham residue to maintain the reduced pressure condition inside the can body in an equilibrium state, thereby reducing the water content derived from the ham residue. To obtain a substitute fuel. As a result, it is possible to perform the treatment with an overwhelmingly small number of steps and a small cost as compared with the conventional ham residue treatment.

That is, while the inside of the can body in which the ham residue and the adsorbent are kept air-tight is sucked to reduce the pressure, external air is supplied to the ham residue and the adsorbent, and the reduced pressure inside the can body is equilibrated. , The boiling point of water can be lowered to, for example, 80 ° C., and the water in the water-containing organic substance can be converted to water vapor and easily dried. Therefore, the water contained in the ham residue evaporates well. Moreover, the oil content in the ham residue is melted by heating the can body and is adsorbed by the adsorbent. The dried body of the obtained ham residue and the adsorbent can be used as a substitute fuel for a boiler capable of burning solid fuel.

As the adsorbent of the present invention, any adsorbent that adsorbs oil derived from ham residues and is itself made of a combustible material may be used. Preferably, a waste material made of fibrous material is advantageous in terms of cost. For example, sawdust, bran, wood chips, coffee bean residue extracted from coffee,
And one or more types selected from pulp material cakes are used. This flammable adsorbent is preferably about several mm in size in order to increase the contact surface with oil.

The proportion of the adsorbent added to the ham residue depends on the proportion of oil in the ham residue. When the oil content in the ham residue is high, the ratio of the adsorbent is increased, and when the oil content is low, the ratio of the adsorbent is reduced. A preferable addition ratio of the adsorbent is 2 to the total amount of the ham residue.
0 to 50% by weight.

The processing conditions inside the can according to the present invention are intended to utilize the dried one as a substitute fuel, so that water easily evaporates inside the can and oil is melted and adsorbed. The temperature must rise to a temperature that is easily absorbed by the agent. Further, if the temperature is too high, the oil component is oxidized and decomposed, and furthermore, it is assumed that combustion is caused by outside air from outside, so it is not necessary to raise the temperature to 300 ° C. or higher.

As a preferable treatment condition in the can body, if the boiling point of water in the can body is, for example, -400 mmHg, the boiling point drops to about 80 ° C.
The operation is performed at a temperature of 80 ° C. to 100 ° C. within Hg.

The dried product of the ham residue and the adsorbent obtained by the treatment method of the present invention has a low water content and can be used as a high-quality fuel, for example, it can be used as a substitute fuel for a boiler. In that case, it is preferable to mold the mixture into pellets according to the specifications of the boiler, or to use the powder as it is.

The heating means for heating the can body includes:
Heated boiler (60-90 ° C), steam boiler (100
-160 ° C), heat medium boiler (0-130 ° C, 0-30
0 ° C.) can be used.

[0021]

[Embodiment 1] Drying Apparatus FIG. 1 is an explanatory view showing the configuration of one embodiment of the ham residue treatment apparatus of the present invention. FIG. 2 is an explanatory diagram showing a cross-sectional configuration of the front of the can body of FIG. 3 is an explanatory view showing a cross-sectional configuration of a side surface of FIG. 2, FIG. 3A is a side cross-sectional view, and FIG. 3B is an explanatory diagram showing a configuration of a main part. FIG. 4 is an explanatory diagram showing a configuration of a main part of FIG.

As shown in FIG. 1, the ham residue treatment apparatus of the present invention comprises a cylindrical can body (1) that holds a ham residue and sawdust in an airtight manner and rotates around a horizontal central axis. It is configured at the center. The can (1) is a cylindrical wall (1
1), and two disk-shaped side walls (12a) (12b) crossing the generatrix and parallel to each other. Can body with an inlet (13) for charging ham residue and sawdust into a cylindrical wall (11)
(1) is provided rotatably on two guide rolls (16) provided at the lower part of the can body (1) cylindrical wall (11) via an electric motor (14) and a gear (15). I have. The ham residue and sawdust in the can (1) are discharged from the receptacle (29) below the can (1) with the input port (13) facing downward.

As shown in FIG. 2, the cylindrical wall (11) of the can (1) has a double structure. Inside the double structure, the can (1) is heated at the beginning of the drying process. The heating medium circulates from the heating medium boiler (heating means) (3) via the rotary joint (17) on one central axis connected to the disk-shaped side wall (12a) of the can body (1) A circulation path (31) is configured, and the heat medium is circulated by a circulation pump (32) arranged in the circulation path (31). (33) is a fuel tank of the heat medium boiler (3),
(34) is a cistern tank of the heat medium boiler (3).

As shown in detail in FIG. 2, the other central shaft (18) that penetrates through the disk-shaped side wall (12b) and reaches the inside of the can body (1) and does not rotate (is fixed) has: A suction pump (suction means) (4) communicating with a suction port (41) fixed at an upper position inside the can body (1); and an intake pipe (52) while maintaining a reduced pressure inside the can body (1). And an air supply nozzle (air supply means) (5) fixed at a diagonally lower position inside the can (1).
The intake pipe (52) can be switched between outside air and the compressor (53) by switching an electromagnetic valve.

The air supply nozzles (5) are respectively disposed on seven upright reinforcing plates (19) along the central axis (18) of the can body (1), and the cylindrical wall (11) of the can body is provided. The outside air is supplied to the ham residue and sawdust remaining at the lower part of the car. In addition, ham residue and sawfish are cans
Due to the rotation of (1), it stays slightly shifted in the rotation advancing direction.
Therefore, the air supply nozzle (5) is fixed at a lower position inclined obliquely in the direction of rotation.

A suction pipe communicating with the suction pump (4)
In (42), heat exchange in the exhaust gas is performed by the heat exchanger (6) on the way, and the heat inside the can (1) can be effectively used. The obtained heat may raise the temperature of the outside air in the intake pipe (52), and may use the heat as hot water for other facilities.

The suction pipe (42) further includes a suction pump (4).
A separator (43) is provided before reaching. This is intended to remove the water in the exhaust gas from which heat has been removed, and to further remove ham residues or sawdust fine particles sucked together with the exhaust gas. The exhaust gas having passed through the separator (43) passes through the suction pump (4) and is further deodorized in the deodorization tower (44).

That is, since the exhaust gas discharged from the suction pump (4) often has an odor, it is preferable that the exhaust gas is discharged after being deodorized by the deodorization tower (44). As the deodorizing tower (44), a water spraying means is provided in a multi-stage route from the lower part of the tower to the upper part of the tower, and the odor is removed with the water sprayed. The exhaust gas whose odor has been removed by watering is discharged at the top of the tower. In addition, the liquid in the deodorization tower (44), together with the processing liquid of the separator (43), the chemical injection pump (46) and the aeration pump
The water is treated and discharged in a water treatment tank (45) provided with (47). In addition, (49) is the processing liquid of the separator (43)
It is a pump sent to (45).

As described above, in this drying apparatus, the ham residue and the sawdust are put into a can body having a structure that can be hermetically closed.
The can (1) is heated while stirring the ham residue and sawdust by rotating the can, and the internal air and steam are removed by suction using a suction pump to facilitate the diffusion of moisture. The air heated by reducing the air pressure and exchanging heat with the discharged air is sucked in such that the inside of the can body is blown to the raw material while maintaining a constant negative pressure.

That is, in this drying apparatus, the suction pump (4)
The pressure inside the can (1) is reduced by using the air supply nozzle (5).
Is used to dry the ham residue and sawdust while maintaining the reduced pressure state, so that the boiling point of the water in the can falls to about 80 ° C. if it is −400 mmHg, for example.

Therefore, the contained water evaporates well. Moreover, the oil content in the ham residue is melted by heating the can (1) and is adsorbed by sawdust, whereby the ham residue and sawdust are dried well and can be used as a substitute fuel.

By the way, in such a drying apparatus, a can
If ham residues and sawdust adhere to the cylindrical wall (11) of (1) and are used for a long period of time, heating from the heating medium boiler in the early stage of the drying process and excess heat of fermentation and oxidation in the latter half of the drying process The efficiency of heat recovery from the heat transfer boiler is degraded. Therefore, it is necessary to prevent ham residue from adhering to the inner wall of the can (1). Therefore, as shown in FIGS. 2 and 3, a scraping means (2) is provided for scraping ham residue and sawdust adhered to the side wall by pressing against the cylindrical wall (11) of the can body.

As shown in detail in FIG. 4, the scraping means (2) comprises a doctor blade (2) which is pressed against the cylindrical wall (11) of the can body (1).
1) is held by the doctor holder (22). The doctor holder (22) is supported by a doctor support (23) extending obliquely upward from the center axis. The angle of the blade of the doctor blade (21) is changed with the doctor support (23) as a fulcrum, and two pressure adjusting springs are provided on the doctor holder (22) at positions almost opposite to each other across the doctor support (23). (Pressurizing means) (24) is provided, and the cutting edge of the doctor blade (21) is
Is pressed against.

Thus, the doctor blade (21) is constantly pressed against the cylindrical wall (11) of the can (1), and scrapes ham residue and sawdust adhered to the cylindrical wall (11) of the rotating can. For,
The ham residue and sawdust that have adhered over a long period of time do not hinder the conduction of excess heat, and the heat transfer efficiency does not deteriorate even during long-term use. The adjustment of the blade (21) is also easy.

The cylindrical wall (11) of the can (1) has a 1/4
Depressed pockets (25) are arranged in rows at circumferential intervals. As shown in FIG. 3b, the pocket (25) has a substantially square plane, one diagonal line is arranged in the direction along the rotation direction, and the ham that has entered the pocket (25). The four inner walls of the pocket (25) are slightly inclined so that the residue and sawdust are likely to fall when carried upward.

Normally, a part of the ham residue remaining in the lower part of the cylindrical wall (11) of the can (1) enters the pocket (25), and the ham that enters the pocket as the can rotates. The residue is carried upward, and falls by its own weight onto the lower part of the cylindrical wall (11) of the can body from above. The dropped ham residue and the sawdust mix well with other ham residues and the sawdust due to the impact at the time of falling. At this time, the air in the can body is satisfactorily supplied to promote drying of the ham residue and sawdust.

Further, on the cylindrical wall (11) of the can body (1), a space is provided between the adjacent pockets (25) in the circumferential direction at an interval of 1/4 circumference along the rotating direction of the can body. The cutting blade (26) is vertically provided. It is possible to mix the ham residue and the sawdust while cutting the ham residue and the sawdust stored in the lower portion of the cylindrical wall (11) in the can body (1) with the cutting blade (26). Therefore, good drying can be promoted even with ham residue and sawdust containing a large amount of long fibers.

The doctor blade (21) is moved by the cutting blade (26).
The doctor blade (21) is provided with a gap (27) through which the cutting blade (26) passes so as not to hinder the scraping of the blade. Therefore,
When passing through the gap (27), the ham residue attached to the cutting blade (26) and the saw blade can also be removed, and even if used for a long time, the effectiveness of the cutting blade (26) is impaired. There is no.

In the ham residue treatment apparatus of this embodiment, the ham residue and sawdust are charged into a can body having a sealable structure, and the internal air and steam are removed by suction using a suction pump to remove the internal air pressure. The air heated by exchanging heat with the discharged air is blown into the raw material while keeping the inside of the can at a constant negative pressure, and the fermentation heat and oxidation heat of the ham residue and sawdust increase. And drying.

Embodiment 2 FIG. Calorimetry Using the apparatus of Example 1, ham residue 60%, Ogako 40
%, And the internal condition of the can is -400 mmHg, 80 ° C.
, And dried all day long. The obtained dried body is 1 mm
Granules of about 5 mm or smaller were obtained. The ash content and the total calorific value of the obtained dried product were measured. Table 1 shows the results.

[0041]

[Table 1]

[0042]

As described above, according to the present invention, a ham residue and a combustible adsorbent for adsorbing oil derived from the ham residue are hermetically held inside a rotatable can body, and the inside of the can body is sucked. To maintain the temperature at which the oil content derived from the ham residue is melted, and supply outside air to the ham residue and the adsorbent to maintain the reduced pressure inside the can body at an equilibrium state, thereby reducing the ham residue. Since the alternative fuel is obtained by removing the water of origin, there is an effect that the treatment can be performed with an overwhelmingly small number of steps and at a low cost as compared with the conventional ham residue treatment.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing a configuration of an embodiment of a ham residue treatment device of the present invention.

FIG. 2 is an explanatory view showing a cross-sectional configuration of the front of the can body of FIG. 1;

FIG. 3 is an explanatory diagram showing a cross-sectional configuration of a side surface of FIG. 2;
The figure is a side sectional view, and the figure b is an explanatory view showing the configuration of a main part.

FIG. 4 is an explanatory diagram showing a configuration of a main part of FIG. 2;

[Explanation of symbols]

 (1)… can body, (11)… cylindrical wall, (12a) (12b)… side wall, (13)… inlet, (14)… motor, (15)… gear, (16)… guide roll, ( 17) Rotary joint, (18) Central shaft, (19) Reinforcement plate (2) Scraping means, (21) Doctor blade, (22) Doctor holder, (23) Doctor support, (24) )… Pressure adjusting spring, (25)… Pocket, (26)… Cutting blade, (27)… Gap, (29)… Receptacle, (3)… Heat medium boiler, (31)… Circulation path, (32) ... circulation pump, (33) ... fuel tank, (34) ... cistern tank, (4) ... suction pump, (41) ... suction port, (42) ... suction piping, (43) ... separator, (44) ... deodorization Tower, (45)… water treatment tank, (46)… drug pump, (47)… aeration pump, (5)… air supply nozzle, (52)… intake piping, (53)… compressor, (6)… Heat exchanger

Claims (4)

[Claims] 1. A ham residue and a combustible adsorbent for adsorbing an oil component derived from the ham residue are hermetically held inside a rotatable can body, and the inside of the can body is sucked to reduce the pressure. Maintaining the inside of the can body at a temperature at which the oil component derived from the ham residue is melted, and supplying outside air to the ham residue to maintain the reduced pressure inside the can body at an equilibrium state to remove water derived from the ham residue. Characteristic ham residue treatment method. 2. The ham residue according to claim 1, wherein the adsorbent is at least one selected from sawdust, bran, wood chip, coffee bean residue, and pulp material cake. Processing method. 3. The processing conditions inside the can are as follows: a reduced pressure state is within −400 mmHg, and a temperature inside the can is 80 ° C. to 1 ° C.
The method for treating ham residue according to claim 1 or 2, wherein the method is performed at 00 ° C. 4. The ham residue according to claim 1, further comprising a step of molding the ham residue from which water derived from the ham residue has been removed and an adsorbent into pellets. Processing method.