JP4727454B2 - Method for measuring waste tatami and method for producing solid fuel - Google Patents

Description

  The present invention relates to a method for measuring waste tatami, and more particularly to a method for measuring waste tatami used as an oil mud absorber in the production of solid fuel.

Since oil mud such as crude oil sludge has high energy, it is expected to be effectively used as fuel without being incinerated or landfilled as industrial waste.
However, oil mud is highly viscous, has no fluidity at room temperature, or has solid content that settles and settles, so it can be handled during transportation through a pipeline. It is difficult to handle as fuel.

  Therefore, in recent years, it has been proposed in Europe that oil mud is not used alone, but oil mud and sawdust are mixed to form a solid fuel and used as an alternative fuel in a cement kiln. In Japan, similar solid fuel is used. Or an oil-containing sludge incineration method (for example, Patent Documents 1 and 2).

However, in these known technologies, for example, when sawdust generated in a sawmill or a furniture factory is used as a solid material for impregnating a viscous substance such as crude oil sludge, the adhesion (surface In addition to the fact that the amount of moisture that affects the oil is likely to adhere to other substances), the quality of the solid fuel is likely to vary, and in addition, most sawdust is traded in value. Therefore, the material cost of the solid fuel tends to increase. In addition, when wood chips having a large particle size produced by crushing waste materials are used, a solid fuel mainly composed of the wood chips requires a relatively long time until combustion is completed. It was unsuitable as a fuel that required complete combustion before landing in the furnace. In addition, when finely crushed so that it completely burns before landing, there are problems such as an increase in the amount of pulverization work, removal of foreign matters, and an increased risk of dust explosion.
Accordingly, the present applicant has previously developed a method for producing a solid fuel that is easy to manufacture by using waste tatami as an absorbent for oil mud and has good combustibility, and filed a patent application (Japanese Patent Application 2004). -363683).

JP-A-54-39401 JP 2002-323213 A

However, depending on the material of the tatami floor, there are main tatami mats, cocoon sand tatami mats, and building material tatami mats, and these tatami mats are transported to the processing facility in a mixed state. Mass per sheet, bulk density after crushing, and oil mud absorption capacity differ greatly.
Therefore, if the amount of waste tatami mixed with oil mud is simply measured by the stack thickness (or number of stacks), mass, volume of crushed material, etc., the amount of waste tatami mixed with oil mud Large variations occur and this is inconvenient.
For example, if the amount of waste tatami is simply measured by the laminated thickness (or the number of laminated layers), the absorption capacity is 1.5 with the same thickness (number of sheets) in the case of only the main tatami and the case of only the building material tatami. Because there is a difference of about twice, if you set the thickness (number of sheets) to be measured so that the absorption capacity of oil mud is not insufficient, using the building material tatami as a standard, the amount of 1.5 times the amount necessary for the main tatami only As a result, the waste tatami waste is generated, the time required for crushing the waste tatami becomes longer, and it is impossible to produce solid fuel efficiently. The same applies to the case where the weight of the waste tatami is measured so that the oil mud absorption capacity is not insufficient. Furthermore, in order to prevent the oil mud absorption capacity from being insufficient, the bulk density of the crushed material of the tatami mat is only about half the bulk density of the crushed material of the main tatami mat. Problem arises.

  The present invention has been made in view of the problems that occur when weighing the above-mentioned waste tatami. The purpose of the present invention is to provide a method for weighing waste tatami where various tatami mats are mixed to efficiently produce solid fuel. It is to propose.

In order to solve the above-mentioned problems, the present invention grasps the number of mixed tatami mats in the waste tatami laminated by visual inspection when measuring the amount of tatami mat required for mixing with oil mud , and the grasped book. It was decided to determine the thickness of stacked waste mats to be weighed or the number of stacked layers according to the number of tatami mats.
Furthermore , according to the present invention, the amount of waste tatami mat is measured using the thickness of the waste tatami mat to be measured according to the number of the main tatami mats mixed, or the scale on which the number of stacks is marked.
Moreover, this invention set it as the manufacturing method of the solid fuel which measures the amount of waste tatami using the measuring method of the waste tatami concerning the said invention, crushes this measured waste tatami and mixes with oil mud.

According to the measuring method of the waste tatami according to the present invention described above, the number of mixed tatami mats in the waste tatami layered by visual observation is grasped, and the layering of the waste tatami mats measured according to the grasped number of mixed tatami mats. Since the thickness or the number of stacked layers is determined, the amount of waste tatami mat required can be measured easily and accurately in a short time without using a measuring device such as a measuring instrument.
In particular, to understand the contamination quantity of the tatami visually, the grasped the tatami weighed in accordance with the mixed number waste tatami stack thickness, or because it was decided to determine the number of laminated sheets, the waste tatami visual type It becomes easy to grasp, and since it becomes easy to determine the stacking thickness or the number of stacks of waste tatami to be weighed, the amount of waste tatami can be measured more easily.
Furthermore, if the amount of waste tatami is measured using the scale of the waste tatami mat to be measured according to the number of main tatami mats mixed or the number of stacks, the number of main tatami mats can be grasped visually. For example, the stacking thickness or the number of stacks of waste tatami that is immediately measured by a scale can be measured, so that the amount of waste tatami can be measured more easily.
Further, according to the method for producing a solid fuel according to the present invention, since the properties of the waste tatami mixed with the oil mud are measured without variation, a solid fuel having a stable quality can be produced.

Hereinafter, the waste tatami metering method and the solid fuel manufacturing method according to the present invention will be described in detail.
The waste tatami to be weighed in the present invention is a used tatami generated by tatami mat change, dismantling of a house, etc., and the waste tatami consists of a tatami floor and a tatami table laid on the upper surface of the tatami floor.
In general, tatami mats are formed by weaving weeds, but in recent years, various types of tatami floors have been used, and tatami mats are classified into main tatami mats, straw sand tatami mats, and building material tatami mats.

The main tatami mat has a traditional tatami floor mainly composed of rice straw.
The straw sand tatami mat has a tatami floor formed by laminating a layer made of rice straw and a polystyrene foam board. An example of the structure of the tatami floor of the cocoon sand tatami mat is a tatami floor composed of an upper layer, an intermediate layer and a lower layer, wherein the upper layer and the lower layer are made of rice straw, and the intermediate layer is made of a polystyrene foam board. . In addition, a polystyrene foam board is a plate-shaped molded object which has a predetermined thickness formed by adding a foaming agent to a polystyrene resin composition and expanding it.
The building material tatami has a tatami floor mainly composed of materials other than rice straw (for example, polystyrene foam board, insulation board, etc.). As an example of the structure of the tatami floor of the building material tatami mat, there is a structure in which the upper layer is made of an insulation board and the lower layer is made of a polystyrene foam board. The insulation board is, for example, a soft fiber board formed by pulverizing wood in water, making paper by adding an adhesive or the like, and then drying.

As shown in Table 1, the quality of each constituent material of the main tatami mat, cocoon sand tatami mat, and building material tatami mat is about 3 times the total calorific value of polystyrene foam, and the chlorine content is one tenth of that of rice straw. It is as follows. The amount of chlorine in the insulation board is about half that of rice straw, and the total calorific value is almost the same as that of rice straw. The quality of each of the main tatami mats, cocoon sand tatami mats, and building material tatami mats is estimated from the quality of each of these constituent materials. The total calorific value and chlorine content are almost the same as tatami mats.

On the other hand, as shown in Table 3, the bulk density of each crushed material of the main tatami mat, cocoon sand tatami mat, and building material tatami mat (the crushed material in which the proportion of crushed material having a length of 5 cm or less is 80% by mass or more) Sand tatami mats are about 90% of main tatami mats, and building tatami mats are about a half of main tatami mats. Also, the oil mud (heavy oil sludge) absorption capacity of each crushed material is shown in Table 3. The crushed material of the main tatami mat and the crushed material of the sandstone tatami mat absorb the oil mud of the same mass as the self, and the crushed material of the building material tatami mat Absorbs about 1.4 times the mass of oil mud. For this reason, if the waste tatami in which various tatami mats are mixed is simply measured by the volume of the crushed material, the oil mud absorption capacity varies greatly depending on the mixed condition of the various tatami mats in the crushed material.
That is, for example, if we measure 2m ³ of crushed material, weigh 248kg for the crushed material only of the main tatami mat, 220kg for the crushed material of only the sand tatami mat, and 128kg for the crushed material only of the building material tatami. If we add the oil mud absorption capacity of various tatami mats to this, we have measured 248 kg of crushed material with oil mud absorption capacity in the case of the main tatami only, and 220 kg in the case of only the sand tatami mat. In the case of building material tatami only, crushed material with a capacity of 179 kg of oil and mud of 128 kg × 1.4 was weighed. The oil mud absorption capacity will vary greatly. If the oil mud absorption capacity of the crushed material thus measured varies greatly, naturally, the quality of the solid fuel produced by mixing the measured crushed material and a predetermined amount of oil mud will also vary greatly. In particular, when a large amount of crushed building material tatami is contained in the measured crushed material, the oil mud absorption capacity of the crushed material is insufficient, and the handling property of the solid fuel to be produced is poor.

In addition, the oil mud absorption capability of each said crushed material is evaluated by the following method.
First, the main tatami mat, the cocoon sand tatami mat, and the building material tatami mat were each crushed using a crusher (WEIMA's uniaxial crusher; rooster opening: 20 mm), and the ratio of crushed materials having a length of 5 cm or less was obtained. It adjusted to the crushed material which is 90 mass% or more.
Subsequently, for each crushed material obtained, 6.20 kg of crushed material and 4.96 kg of oil mud (mass ratio to crushed material: 0.8) were put into a mixer (Eirich mixer manufactured by Eirich) and stirred for 15 seconds. After mixing, the quality of the obtained mixture was evaluated visually and with a sense. In the evaluation, those having no gloss and adhesion due to oil mud on the surface of the mixture were marked with “◯”, and those having gloss and adhesion due to oil mud were marked with “X”. This evaluation criterion is that when the liquid (oil or water excluding solids) in the oil mud cannot be completely absorbed by the solid material and remains on the surface of the solid material, a liquid bridge is formed between the inner wall of the pumping pipe and the fuel. Since it is known that it adheres and causes the blockage of the pipeline, it is adopted as a criterion for quality. In this case, since the surface was wet, gloss was seen as an evaluation index.
When the evaluation result is “◯”, 0.62 kg of oil mud (mass ratio to the crushed material: 0.1) was added to the mixer, and the mixture was further stirred and mixed for 15 seconds, and the properties of the mixture were evaluated in the same manner as described above. . Thereafter, addition of oil mud and stirring were repeated until the evaluation result was “x”, and the oil mud absorption capacity of each crushed material was evaluated and listed in Table 3.

In addition, when measuring the waste tatami simply by the mass or stack thickness (or the number of stacked layers) of the waste tatami before crushing, the oil mud absorption capacity also varies.
That is, based on the mass, if, for example, only 200 kg is measured, the main tatami mat and the sand tatami mat absorb the oil mud of the same mass as the self, and the building mat tatami is about 1.4 times as much as the self. In order to absorb the mass of oil mud, in the case of the main tatami mat or the sand tatami mat only, the waste tatami having an oil mud absorption capacity of 200 kg was measured, and in the case of only the building material tatami mat, 200 kg × 1.4 280 kg This means that waste tatami mats with the ability to absorb oil mud are weighed.
Also, if the thickness of the stack (or the number of stacks) is used as a reference, for example, if only 72 cm is measured, the thickness of one tatami mat is approximately 6 cm, so that 12 tatami mats are measured. The mass of one tatami mat is approximately 25kg main tatami mat, 17kg cocoon sand tatami mat, and 12kg tatami mat tatami mat. In the case of tatami only, 17 kg x 12 204 kg, and in the case of building material tatami only, 12 kg x 12 144 kg. This means that the waste tatami mat has been weighed, and in the case of only the sand tatami mat or the building material tatami mat, the waste tatami having an oil mud absorption capacity of approximately 200 kg has been weighed.
Because the oil mud absorption capacity of the waste tatami weighed as described above will vary greatly, we will weigh more waste tatami with a margin based on the poor oil mud absorption capacity so that the oil mud absorption capacity is not insufficient. Then, the crushing time of waste tatami may become unnecessarily long, and the processing efficiency of oil mud may be reduced.

From the above, it is indispensable to grasp the type of waste tatami mat, and then the method of changing the mass to be measured according to the type and the thickness or number to be measured However, in the method of changing the mass to be measured, a measuring instrument is required, and the work of adjusting the tatami while measuring is essential, which is not efficient.
Accordingly, the present invention is to grasp the contamination quantity of the mat in the waste tatami stacked by visually determining the grasped the tatami weighed in accordance with the mixed number waste tatami stack thickness, or the number of laminated layers It was decided.
That is, first, the operator visually checks the stacked tatami mats and grasps the type.
At this time, it is not necessary to grasp all types of main tatami mats, cocoon sand tatami mats, and building material tatami mats together with the number of the tatami mats . This is because from the properties of the various types of abandoned tatami mats, the sand tatami mats and building tatami mats have approximately the same oil mud absorption capacity per sheet. Based on the knowledge that waste tatami can be measured without variation in oil mud absorption capacity.
Subsequently, the thickness of stacked waste tatami mats to be weighed or the number of stacked tatami mats are determined in accordance with the number of main tatami mats. In this decision, considering that the oil mud absorption capacity per tatami mat is approximately 1.4 times that of the sand tatami mat and building tatami mat, for example, it absorbs oil mud (approximately 200 kg) for one drum can. When measuring the waste tatami to be used as one batch, it can be determined based on, for example, Table 4 derived from the following relationships a to c.

a. Since the crushed material of the main tatami can absorb the oil mud having the same mass as the self, 200 kg of the main tatami is required to absorb 200 kg of the oil mud.
b. Since the mass of one main tatami is about 25kg, in order to make 200kg with only the main tatami, 8 main tatami mats are necessary, and the thickness of one main tatami mat is 6cm. 48 cm.
c. As the number of mixed tatami mats decreases, sand tatami mats or building tatami mats, which have poor oil mud absorption capacity per sheet, increase. If not, it is necessary to weigh 72 cm, which is 1.5 times that of the main tatami mat, or 12 sheets.
From the above relationship, the thickness of laminated layers or the number of laminated layers according to the number of sheets mixed in the main tatami mat, where the variation in oil mud absorption capacity is ± 5% or less, is as shown in Table 4.

When it is grasped from Table 4 that the main tatami mats are almost the same, the laminated thickness of 48 cm or the laminated number of 8 sheets is weighed. When it is grasped that the main tatami mat is about two thirds, the laminate thickness of 54 cm or the laminate number of 9 sheets is measured. When it is grasped that the main tatami mat is about half, the laminated thickness 54 cm or 60 cm, or the laminated number 9 or 10 is weighed. When it is determined that the main tatami mat is about one third, the stacking thickness is 66 cm or the stacking number is 11 pieces. When the main tatami mat is not found by visual inspection, the laminated thickness of 72 cm or the laminated number of 12 sheets is weighed.
As shown in FIG. 1, if the weighing work is performed using a stack thickness of waste tatami mats to be weighed according to the number of mixed main tatami mats, or a scale with the number of stacked tatami mats, It is preferable to grasp the number of mixed sheets because it is possible to measure the laminated thickness of laminated tatami mats to be measured by a scale or the number of laminated sheets.
Specifically, for example, when transporting stacked waste tatami to a crusher with a forklift, the amount of one batch conveyed to the crusher by weighing the waste tatami from the top as shown in FIG. Can be easily measured.

The waste tatami weighed by the above method is subsequently crushed and mixed with oil mud to produce a solid fuel.
The crushing of the waste tatami is performed so that the ratio of the crushed material having a length of 5 cm or less in the crushed material is preferably 80% by mass or more, more preferably 90% by mass or more. This is because when the ratio is 80% by mass or more, formation of a bridge in the tank can be suppressed, and the handling property of the solid fuel can be further improved.
As an example of the crushing method for making the proportion of the crushed material having a length of 5 cm or less in the crushed material 80% by mass or more, there is a method of crushing the waste tatami using a uniaxial crusher equipped with a rooster. Can be mentioned. In this case, if the opening size of the rooster is 20 mm or less, the proportion of the crushed material having a length of 5 cm or less in the waste crushed crushed material can be easily 90 mass% or more.

The oil mud absorbed by the waste crushed material is oil sludge (for example, heavy oil sludge, crude oil sludge, etc.), waste oil regeneration residue (residue that remains after regenerating waste oil using oil water separation equipment, etc.), waste paint, waste ink , Including one or more oily substances such as waste solvent, grease, waste vegetable oil, waste edible oil, and dehydrated organic sludge.
Above all, oil sludge and waste oil recycling residue are mainly composed of hydrocarbons with large molecular weight, high viscosity, and easy to separate solids, so that they are difficult to handle as fuel and conventionally incinerated or landfilled. It is preferably used from the viewpoint of promoting the use of waste.

The mixing of the oil mud and the waste crushed material is performed by strictly adjusting the blending ratio in consideration of the properties of the oil mud and the like.
In the present invention, waste tatami in which various tatami mats are mixed is weighed so that the oil mud absorption capacity does not vary. If the entire amount of the product is mixed with one batch of oil mud, for example, oil mud for one drum (for example, about 200 kg of heavy oil sludge), mixing at an accurate blending ratio can be achieved.
The amount of the oil mud is 30 to 300 parts by weight, preferably 50 to 200 parts by weight, more preferably 80 to 150 parts by weight, based on 100 parts by weight of the crushed waste tatami, taking into account the properties of the oil mud. To be determined. If the blending amount is less than 30 parts by mass, it does not meet the purpose of effectively using a viscous substance such as crude oil sludge as fuel. On the other hand, when the blending amount exceeds 200 parts by mass, gloss and adhesion are generated on the surface of the produced solid fuel, and handling properties are deteriorated. However, when oil mud containing a large amount of solid is used, up to 300 parts by mass may be blended.

In addition to the waste crushed material and the oil mud, organic powder can be used as the material for the solid fuel. By blending the organic powder, the bulk density of the solid fuel can be increased and the processing capacity of the facility can be increased. Depending on the type of organic powder, the usable amount of oil mud in the solid fuel can be increased.
In the present specification, powder means solid particles having a particle size of 1 mm or less.
Preferable examples of the organic powder include organic powders having an average particle size of 300 μm or less (particularly preferably 100 μm or less). Examples of such organic powder having an average particle size of 300 μm or less include toner, heavy oil ash, pulverized coal, pulverized activated carbon, and pulverized meat and bone powder. These organic powders may be used alone or in combination of two or more. Among them, the toner and heavy oil ash have an average particle diameter of 1 to 30 μm, and have excellent effects in terms of increase in usable capacity of oil mud, increase in heat amount of fuel, and increase in equipment capacity due to increase in bulk density. Since it has, it is used preferably.
The upper limit of the blending amount of the organic powder is preferably 200 parts by mass or less, more preferably 150 parts by mass or less, and particularly preferably 120 parts by mass or less, with respect to 100 parts by mass of the waste crushed material. When the value exceeds 200 parts by mass, the fluidity of the solid fuel is lowered, and a bridge may be generated in the storage tank or a blockage may be generated in the pipeline. The lower limit of the blending amount of the organic powder is not particularly limited, but in order to sufficiently obtain the effect of blending the organic powder, preferably 5 parts by mass or more with respect to 100 parts by mass of the waste crushed material, More preferably, it is 10 mass parts or more, Most preferably, it is 20 mass parts or more.

An example of a method of using the solid fuel produced as described above is to put the solid fuel into a firing furnace through a pipe and burn it.
Here, examples of the firing furnace include a cement kiln for producing a clinker and a kiln for firing quick lime and lightweight aggregate.

Next, an example of a method for producing a solid fuel and a method for using the same according to the present invention will be described with reference to the drawings.
FIG. 2 is a diagram conceptually showing a solid fuel production facility and a cement kiln using the solid fuel.
The waste tatami for one batch weighed by the measuring method according to the present invention is first put into the crusher 1, and is preferably crushed into a crushed material having a length of 5 cm or less and a crushed material having a length of 80% by mass or more. The Then, the obtained waste crushed material is conveyed by the conveyor 2, and organic powder such as toner and heavy oil ash is quantitatively supplied from the storage device 3 in the middle, and is stored in the hopper 4 in a state where both are mixed. Is done.
One batch of waste crushed material stored in the hopper 4 is put into the mixer 5 together with one batch of oil mud, for example, oil mud for one drum can (for example, about 200 kg of heavy oil sludge), and is thoroughly stirred and mixed. The As a result, the oil mud is absorbed by the solid material such as the mixed waste crushed material and becomes solid fuel.
The solid fuel discharged from the mixer 5 is crushed by a pulverizer 6 installed downstream thereof, foreign matter is removed by a drum magnetic separator 7, its particle size is adjusted by a trommel 8, and stored in a silo 9. The
The solid fuel stored in the silo 9 is weighed by the meter 10 and is pneumatically fed toward the burner 12 instead of or in combination with the pulverized coal that is the main fuel of the cement kiln 11. Is injected into the cement kiln 11 from the fuel injection port.
The solid fuel introduced into the cement kiln 11 is completely burned in a short time before landing on the furnace bottom by the flame from the burner 12, and the combustion residue of the solid fuel becomes a part of the clinker component. In addition, since solid fuel burns completely before landing, the quality of a clinker is not reduced.

[Examples 1-3, Comparative Examples 1-2]
(1) Measurement of waste tatami ・ Since stacked tatami mats were visually observed and only main tatami mats were used, 8 waste tatami mats were weighed as one batch based on Table 4 (Example 1).
-The laminated waste tatami was visually observed, and there were 5 main tatami mats. Therefore, 10 waste tatami mats were weighed as one batch based on Table 4 (Example 2).
-The laminated waste tatami was visually observed, and there were 2 or 3 main tatami mats. Therefore, 11 waste tatami mats were weighed as one batch based on Table 4 (Example 3).
-From the laminated waste tatami mats, 8 waste tatami mats were weighed as one batch (Comparative Example 1).
In addition, when this measured waste tatami was confirmed before crushing, the number of main tatami mats was two. -From the laminated waste tatami, only 12 waste tatami mats were weighed as one batch (Comparative Example 2). In addition, when this measured waste tatami was confirmed before crushing, the number of main tatami mats mixed was 7. (2) Crushing of waste tatami Each batch of waste tatami weighed using a uniaxial crusher (WEIMA uniaxial crusher; rooster opening: 20 mm) is crushed and has a length of 5 cm or less. It adjusted to the crushed material whose ratio of a crushed material is 90 mass% or more. Table 5 shows the time required for crushing the waste tatami for each batch.
(3) Mixing with oil mud After each batch of crushed crushed material is put into a mixer (Eirich mixer manufactured by Eirich) together with oil mud (about 200 kg of heavy oil sludge) for one drum, the mixture is stirred and mixed for 4 minutes. Then, it was crushed with a crusher. Each solid fuel obtained was evaluated for adhesion. The evaluation results are also shown in Table 5.
In the evaluation of adhesion, “solid circle” indicates that the surface of the solid fuel has no gloss and adhesion due to oil mud, and “x” indicates that it has gloss and adhesion due to oil mud.

From Table 5, the solid fuel (Examples 1-3) manufactured using the waste tatami weighed by the measuring method according to the present invention does not have gloss and adhesion on the surface, and is stored or via a pipeline. It can be seen that excellent handling properties are exhibited during supply.
On the other hand, considering the reduction of crushing time and waste of waste tatami, solid fuel manufactured using waste tatami that weighed the minimum number of sheets considered necessary without considering the type of waste tatami (Comparative Example 1 ) Shows that gloss and adhesion are generated on the surface, and handling properties are inferior. In addition, when waste tatami is weighed so that the oil mud absorption capacity is not insufficient (Comparative Example 2), it can be seen that the crushing time takes a long time, and that it is impossible to efficiently produce solid fuel.

It is the figure which showed an example of the scale used for the measuring method of the waste tatami concerning this invention. It is the figure which showed notionally the equipment which implement | achieves the manufacturing method of the solid fuel which concerns on this invention, and the cement kiln which uses the solid fuel.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Crusher 2 Conveyor 3 Organic powder storage device 4 Hopper 5 Mixer 6 Crusher 7 Drum magnetic separator 8 Trommel 9 Solid fuel storage silo 10 Meter 11 Cement kiln 12 Burner

Claims (3)

When measuring the amount of waste tatami mat required for mixing with oil mud, the number of mixed tatami mats in the waste tatami layered by visual observation is grasped, and the amount of waste tatami mats measured according to the grasped number of mixed tatami mats is measured . A measuring method of waste tatami mats, characterized in that the thickness of stacked layers or the number of stacked layers is determined . 2. The waste tatami mat according to claim 1, wherein the amount of waste tatami is measured using a thickness of the waste tatami mat to be measured according to the number of mixed tatami mats or a scale on which the number of stacks is marked . Weighing method. A method for producing a solid fuel, characterized in that the amount of waste tatami is measured using the method for measuring waste tatami according to claim 1, and the measured waste tatami is crushed and mixed with oil mud.

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