JP2009149740A - Fuelization method for high moisture content organic waste and biomass fuel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a fuelization method for a high moisture content organic waste, by which chlorine and/or chlorine compounds included in a high moisture content organic waste containing livestock excrement and food waste can be effectively removed, the moisture content can be reduced and a decomposition rate of organic substances can be suppressed to not more than 20 mass%, and to provide a biomass fuel. <P>SOLUTION: The fuelization method for a high moisture content organic waste comprises: dehydrating a high moisture content organic waste by a dehydrating device 18 to obtain a dechlorinated organic waste; drying the dechlorinated organic waste with natural energy by a solar drying equipment 21A; and subsequently drying the waste with fermentation heat energy by a fermentation equipment 22A to obtain a dry dechlorinated organic waste having a chlorine concentration of not more than 3,000 ppm, a moisture content of not more than 35 mass%, and a decomposition rate of organic substances of not more than 20 mass%. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a method for fuelizing high-moisture content organic waste and biomass fuel. More specifically, the present invention relates to livestock excreta containing livestock excrement such as pig excrement, cattle excrement and chicken excrement, or disposal at department stores, supermarkets, convenience stores, etc. It effectively removes chlorine and / or chlorine compounds contained in organic waste with a high water content that contains a large amount of water and contains a large amount of water, while reducing the water content and reducing the decomposition rate of organic matter. High moisture content organic waste fueling method that can be suppressed to 20% by mass or less, and chlorine and / or chlorine compounds contained in high moisture content organic waste, while reducing moisture content and organic matter decomposition rate It is related with the biomass fuel which suppressed 20 mass% or less.

Conventionally, livestock excrement including livestock excrement such as chicken dung, cow dung, pig dung, etc., or food waste such as unsold lunch boxes and various leftover foods discarded at department stores, supermarkets, convenience stores, restaurants, etc. Although it is common to use it as a fertilizer in a fermented state, it may be reduced in volume by incineration using an incinerator or the like, and the incinerated ash obtained may be used as a fertilizer.
In particular, in recent years, due to the enforcement of the Optimization Act on the management of livestock excreta, most of the livestock excreta including livestock excreta are expected to be fertilized, but they are used due to the decreasing trend of farmland. The total amount of fertilizer is also decreasing. Therefore, diversification of uses other than fertilizer is urgently required to effectively use organic waste such as livestock excrement and food waste, and use as energy is one of them.

In general, livestock excrement has a high calorific value in a low moisture content state of 35% by mass or less, but in order to achieve a low moisture content state, natural drying for a long time or heat drying using fossil fuels. However, the use of energy as an energy source has been carried out to some extent but has not progressed overall.
Current energy use of livestock excreta includes the use of chicken manure as a fuel for power generation and waste boilers, and methane fermentation of cattle and swine manure to produce biogas consisting mainly of methane gas. For example, biogas is used as fuel.

Various methods and apparatuses for effectively using organic waste such as livestock excrement and food waste have been proposed. For example, the following proposals have been made.
(1) Dispose of hydrated waste products such as chicken manure and livestock manure in a closed system by arranging a circulation system of generated steam between a hot-blast furnace equipped with a steam pipe and a combustion chamber and a multistage drying carbonization furnace. A method of generating carbide and ash while circulating a heat source (Patent Document 1).
In this method, by collecting carbide from the dry carbonization furnace and ashing from the hot air furnace respectively, the resources and secondary utilizable carbides and ashing can be recovered at the same time, and resource saving and pollution-free promotion are promoted. I am trying.
(2) A drier for drying livestock excrement, a separator for separating dried livestock feces into small and large grains, an incinerator for incinerating the separated dry livestock feces, and crushing unfinished livestock feces A livestock dung drying and incineration apparatus having a magnetized vibrating sieve that exposes foreign matters mixed with metals through magnets (Patent Document 2).
In this device, metal foreign matters such as stones and metals mixed in livestock excrement materials can be easily removed to avoid machine troubles caused by metal foreign matters and to incinerate the livestock excrement. The heat generated by this is used effectively.
JP 2004-330092 A Japanese Patent Laid-Open No. 2005-156085

By the way, as described above, various methods and apparatuses for effectively using organic waste such as livestock excrement and food waste have been proposed. However, these methods and apparatuses also have the following problems. There was a point.
When trying to use chicken manure as an energy source, the main point that hinders the energy use of chicken manure is the high chlorine content. If the chlorine content of chicken manure is high, the combustion component may corrode due to this chlorine component, or low melting point chlorine compounds may be generated, causing various troubles such as blockage in various places such as piping. There was a problem.
Moreover, when this chicken manure is thrown into a cement baking equipment as a fuel, for example, the chlorine component contained in it may mix in a cement clinker and may reduce the quality of cement. In addition, since the chlorine component may cause troubles such as corrosion of the cement firing facility, there is a possibility that the cement operation may be adversely affected.

Also, it is difficult to use energy from cattle and swine manure because of the high chlorine content and high water content of around 80%, similar to chicken manure, the thermal energy generated during combustion when used as fuel. This is because it is deprived of the latent heat of vaporization of water contained in manure and it is difficult to effectively use energy as fuel.
Thus, for various reasons, the effective use of organic waste including livestock excrement and food waste as an energy source is not ridiculous.

  The present invention was made in order to solve the above-mentioned problem, and contains livestock excreta including livestock excrement such as pig excrement, cattle excrement, and chicken excrement, food waste such as unsold lunches and various leftover foods, etc. In addition, chlorine and / or chlorine compounds contained in high water content organic waste containing a large amount of water can be effectively removed, the water content can be reduced, and the decomposition rate of organic substances can be suppressed to 20% by mass or less. A method for converting high water content organic waste into fuel, and removing chlorine and / or chlorine compounds contained in high water content organic waste, reducing the water content, and suppressing the organic matter decomposition rate to 20% by mass or less. The purpose is to provide biomass fuel.

  As a result of intensive studies to solve the above problems, the present inventors have conducted a dehydration treatment on a high water content organic waste containing either or both of livestock excrement and food waste. Chlorine and / or chlorine compounds contained in organic waste with a high water content can be removed to obtain a dechlorinated organic waste with a very low chlorine concentration of 3000 ppm or less. When the drying or heating drying by either one of the fermentation heat energy and the natural energy or the drying or heating drying by the other of the fermentation heat energy are sequentially performed, the chlorine concentration is 3000 ppm or less and the water content is 35% by mass. In the following, dry dechlorinated organic waste with an organic matter decomposition rate of 20% by mass or less can be obtained. It can be effectively used as a biomass fuel of the cement burning facility, yet found that there is no possibility of adversely affecting the operation and cement quality of the cement burning facility, which resulted in the completion of the present invention.

  That is, the method for fuelizing a high water content organic waste of the present invention is a method for fuelizing a high water content organic waste containing either one or both of livestock excrement and food waste, By dehydrating the high water content organic waste, chlorine and / or chlorine compounds contained in the high water content organic waste are removed to form dechlorinated organic waste, and then this dechlorinated organic waste In addition, a chlorine concentration of 3000 ppm or less is obtained by sequentially applying drying or heating drying with either one of natural energy or fermentation heat energy, and drying or heating drying with either the natural energy or the fermentation heat energy. A dry dechlorinated organic waste having a rate of 35% by mass or less and an organic decomposition rate of 20% by mass or less is characterized.

In this high water content organic waste fuel conversion method, the high water content organic waste is dehydrated to remove chlorine and / or chlorine compounds contained in the high water content organic waste, thereby reducing the chlorine concentration. Use dechlorinated organic waste of 3000 ppm or less.
Next, the dechlorinated organic waste is sequentially subjected to drying or heating drying by either one of natural energy or fermentation heat energy, and drying or heating drying by any one of the natural energy or fermentation heat energy. In addition to adjusting the amount of both natural energy and fermentation heat energy added to the dechlorinated organic waste, the water content is adjusted to 35% by mass or less, and the decomposition rate of the organic matter contained in the dechlorinated organic waste is adjusted. Suppressed to 20% by mass or less to secure a sufficient calorific value as biomass fuel.

In this way, by adjusting the energy amounts of both natural energy and fermentation heat energy, dry dechlorinated organic waste having a chlorine concentration of 3000 ppm or less, a water content of 35% by mass or less, and an organic matter decomposition rate of 20% by mass or less. You can get things.
The dry dechlorinated organic waste thus obtained has an extremely low chlorine concentration and water content and a high calorific value, and can be effectively used as a biomass fuel with high combustion efficiency.
Further, even when this dry dechlorinated organic waste is introduced as fuel into a cement firing facility, there is no possibility of adversely affecting cement operation and quality.

The water content of the high water content organic waste is preferably 60% by mass or more.
By setting the water content of the high water content organic waste to 60% by mass or more, chlorine and / or chlorine compounds contained in the high water content organic waste are effectively removed by dissolving in water. It becomes possible to easily and inexpensively obtain dechlorinated organic waste having a chlorine concentration of 3000 ppm or less.

The dry dechlorinated organic waste is preferably subjected to any one or more of classification, pulverization, and pulverization.
The dried dechlorinated organic waste usually has a relatively large shape such as a spherical shape, a block shape (block shape), or a plate shape after the drying treatment. Therefore, by carrying out any one or more of classification, pulverization, and pulverization on the dried and dechlorinated organic waste that has been dried, it is possible to obtain a granular material having a desired shape with high combustion efficiency. It becomes possible.

Biomass fuel of the present invention is a biomass obtained by removing chlorine and / or chlorine compounds contained in a high water content organic waste containing either or both of livestock excrement and food waste, and drying or heat drying the biomass. Fuel,
The chlorine concentration is 3000 ppm or less, the moisture content is 35 mass% or less, and the decomposition rate of organic substances is 20 mass% or less.

In this biomass fuel, the chlorine concentration is set to 3000 ppm or less and the moisture content is set to 35 mass% or less, so that even when used as fuel, the thermal energy generated during combustion is lost to the latent heat of evaporation of moisture contained in the biomass fuel. This eliminates the risk that the energy will be lost and makes it possible to effectively use the energy as fuel.
Moreover, sufficient calorific value as biomass fuel is ensured by setting the decomposition rate of organic matter to 20 mass% or less.
In addition, since the chlorine concentration is as low as 3000 ppm or less, there is no risk of problems such as corrosion or blockage of pipes in the combustion equipment, etc., and even when it is put into cement firing equipment, the operation and quality of the cement There is no risk of adverse effects.

According to the high water content organic waste fueling method of the present invention, the high water content organic waste is dehydrated to remove chlorine and / or chlorine compounds contained in the high water content organic waste. The dechlorinated organic waste is then dried or heat-dried by any one of natural energy and fermentation heat energy, and dried by any one of the natural energy and fermentation heat energy. By sequentially performing heating and drying, the chlorine concentration and moisture content are extremely low because the chlorine concentration is 3000 ppm or less, the moisture content is 35% by mass or less, and the organic material decomposition rate is 20% by mass or less. Dry dechlorinated organic waste having a low and high calorific value can be obtained. Therefore, biomass fuel with high combustion efficiency can be provided.
Moreover, since natural energy such as solar heat or fermentation heat energy of organic waste is used for drying or heating and drying, and fossil fuel is not used, the energy saving effect is large and the environmental load is small.
Moreover, even when this dry dechlorinated organic waste is introduced as fuel into a cement firing facility, adverse effects on cement operation and quality can be prevented.

According to the biomass fuel of the present invention, the chlorine concentration is 3000 ppm or less, the moisture content is 35% by mass or less, and the organic matter decomposition rate is 20% by mass or less. Therefore, the combustion efficiency is high, the energy saving effect is great, and the environmental load is high. A small biomass fuel can be provided.
In addition, troubles such as corrosion and blockage of pipes can be prevented even in a combustion apparatus or the like that burns this biomass fuel, and even when this biomass fuel is put into a cement firing facility, the combustion efficiency may be reduced. And there is no risk of adverse effects on cement operation and quality.

BEST MODE FOR CARRYING OUT THE INVENTION The best mode of the present invention for fueling a high water content organic waste and biomass fuel will be described with reference to the drawings.
The present embodiment is specifically described for better understanding of the gist of the invention, and does not limit the invention unless otherwise specified.

"Fueling equipment for organic waste with high water content"
FIG. 1 is a schematic diagram showing a fueling facility used in a method for fuelizing a high water content organic waste according to an embodiment of the present invention.
In the figure, 1 is a discharge source for discharging high water content organic waste, 2 is a desalination facility for high water content organic waste, and 3 is a fueling facility.

  Here, the high water content organic waste is an organic waste having a water content of 60% by mass or more, more preferably 70% by mass or more, and further preferably 80% by mass or more. Such as swine manure, cow manure, chicken manure, etc., excreta containing treated water, swine manure, cow manure, chicken manure, etc. Slurry containing livestock manure obtained by pouring and stirring livestock manure into equal to or greater than 20 times the amount of water, and food and large amounts of water discharged when washing used lunch containers and food containers by washing Food waste-containing treated water, and the like. These can be used singly or in combination of two or more as required.

The discharge source 1 is a source that discharges the above-mentioned high water content organic waste. For example, a pig house that discharges excrement-containing treated water obtained by washing excrement including swine dung and urine with water, cow dung, Cattle barn that discharges excrement-containing treated water that has been washed by washing urine-containing excrement, livestock barn that discharges excrement-containing treated water that has been washed by washing chicken cages, etc., pig manure, cow manure, chicken manure A waste tank of animal manure containing slurry obtained by adding and agitation of animal excreta such as etc. into water of equal to or greater than 20 times the volume, food waste discarded in containers, department stores, supermarkets, convenience stores, etc. And food waste treatment facilities that discharge processed water containing food waste that has been washed with water.
Two or more types of high water content organic waste discharged from each facility may be mixed depending on the application.

  The desalination facility 2 is a facility for desalinating the high water content organic waste discharged from the discharge source 1 so that the chlorine concentration is 3000 ppm or less, and stores the high water content organic waste. A tank 11, a primary solid-liquid separator 12 comprising a screen or the like for solid-liquid separation of this high water content organic waste, and an adjustment tank for storing a primary slurry (aqueous solution) generated by solid-liquid separation and adjusting the flow rate 13, a primary aeration tank 14 for subjecting the primary slurry to primary aeration, a secondary solid-liquid separator 15 comprising a screen or the like for solid-liquid separation of the slurry subjected to primary aeration treatment, and the solid-liquid separation. A secondary aeration tank 16 for secondary aeration treatment of the generated secondary slurry (aqueous solution), a membrane immersion tank 17 for separating the slurry subjected to the secondary aeration treatment into sludge and treated water by membrane immersion treatment, and the sludge Water content is 85 mass The dehydration treatment device 18 that separates into the following dechlorinated organic waste and treated water, and the treated water receiving tank 19 that temporarily stores and discharges the treated water discharged from the membrane immersion tank 17 and the dewatering treatment apparatus 18 are configured. Yes.

  The fueling facility 3 is a facility for converting the dechlorinated organic waste having a chlorine concentration of 3000 ppm or less sent from the desalting facility 2 into fuel, and a sun drying facility 21A for drying or heat drying using natural energy. 21B, fermentation equipment 22A, 22B for drying or heat drying using fermentation heat generated in the fermentation process of organic waste, and solid dry dechlorination taken out from fermentation equipment 22A or sun drying equipment 21B A pulverizer 23 having a function of classifying particles with a diameter of 10 mm or less by performing any one or more of classification, pulverization, and pulverization on organic waste, fermentation equipment 22A, and sun drying It comprises a storage 24 for sorting and storing dry dechlorinated organic waste discharged from one or more of the equipment 21B and the pulverizer 23 according to specifications and varieties. .

The sun drying equipment 21A and the fermenting equipment 22A are arranged in series so that the sun drying equipment 21A side is the previous stage (previous process), while the fermentation equipment 22B and the sun drying equipment 21B are the front stage of the fermentation equipment 22B. It arrange | positions in series so that it may become (pre-process).
Here, the drying using natural energy is drying by wind power or the like, and the heating drying using natural energy is heating drying by solar heat, heating drying using solar heat and wind power or the like.

The sun drying facilities 21A and 21B are facilities for performing sun drying using solar heat alone or solar heat and natural wind depending on the type and amount of dechlorinated organic waste. A dryer or the like is preferably used.
Fermentation equipment 22A, 22B is equipment which dries or heat-drys this dechlorination organic waste using fermentation heat generated when fermenting dechlorination organic waste, for example, a vertical closed type fermenter, a horizontal type An open-type fermenter, a horizontal open-type compost house, etc. are preferably used.
As the pulverizer 23, an automatic mortar, a stamper, a kneader, a roll mill or the like having a classification function is preferably used.

"Fueling method for organic waste with high water content"
The high water content organic waste fueling method of the present invention uses a high water content organic waste fueling facility shown in FIG. 1 and contains either or both of livestock excrement and food waste. This is a method for fueling organic waste with a high water content. By dehydrating this high water content organic waste, chlorine and / or chlorine compounds contained in this high water content organic waste are removed. It is dechlorinated organic waste, and then this dechlorinated organic waste is dried or heat-dried by either natural energy or fermentation heat energy, and dried or heat-dried by either natural energy or fermentation heat energy, In order to obtain a dry dechlorinated organic waste having a chlorine concentration of 3000 ppm or less, a moisture content of 35% by mass or less, and an organic matter decomposition rate of 20% by mass or less.

A method for converting this high water content organic waste into fuel will be described in detail with reference to FIG.
The high water content organic wastes such as the above-described excrement-containing treated water and food waste-containing treated water discharged from the discharge source 1 are temporarily stored in the primary tank 11 of the desalination facility 2, and a liquid feed pump (not shown) ) And the like to the primary solid-liquid separator 12, and this high water content organic waste is solid-liquid separated into a cake (solid content) and a primary slurry (aqueous solution). Next, the primary slurry generated by the solid-liquid separation is charged into the adjustment tank 13 and stored, and the primary slurry is introduced into the primary aeration tank 14 via a quantitative supply device such as a measurement tank of the adjustment tank 13. The primary slurry is subjected to a primary aeration process.

  Next, the slurry that has been subjected to the primary aeration treatment is put into the secondary solid-liquid separator 15 using a liquid feed pump (not shown) or the like, and this slurry is added to the cake (solid content) and the secondary slurry (aqueous solution). The secondary slurry produced by the solid-liquid separation is put into the secondary aeration tank 16 and subjected to secondary aeration treatment. Next, the slurry subjected to the secondary aeration treatment is put into the membrane immersion tank 17 and subjected to the membrane immersion treatment, and separated into sludge and treated water. Next, the sludge is introduced into the dehydration apparatus 18 and subjected to a dehydration process.

Thereby, the high water content organic waste is effectively desalted by two-stage solid-liquid separation, the chlorine concentration is 3000 ppm or less, preferably 2000 ppm or less, and the water content is 90% by mass or less. Preferably, it becomes a cake-like dechlorinated organic waste of 80% by mass or less.
The treated water discharged from the membrane immersion tank 17 and the dehydration processing apparatus 18 is temporarily stored in the treated water receiving tank 19 and then discharged.

On the other hand, the cake taken out from each of the primary solid-liquid separator 12 and the secondary solid-liquid separator 15 can be used by mixing with dehydrated sludge having a lower chlorine concentration.
For those with a chlorine concentration exceeding 3000 ppm, use a desalination facility that has been installed separately, and then mix with the above cake-like dechlorinated organic waste. Can do.

Next, the dechlorinated organic waste is transported to the fueling facility 3 and converted into fuel.
As a method of converting this dechlorinated organic waste into fuel, there is one of the following methods (1) and (2).
(1) Bring dechlorinated organic waste into solar drying equipment 21A, dry or heat dry using natural energy such as solar heat or wind power, and dry the resulting dechlorinated organic waste into fermentation equipment 22A It is carried in and dried or heat-dried using the heat of fermentation generated in the fermentation process of the dried product to obtain dried dechlorinated organic waste.
(2) Bring the dechlorinated organic waste into the fermentation facility 22B, and dry or heat dry using the fermentation heat generated in the fermentation process of the dechlorinated organic waste, and dry the resulting dechlorinated organic waste A thing is carried in to the sun drying equipment 21B, and dried or heat-dried using natural energy such as solar heat or wind power to obtain a dechlorinated organic waste.

Since this dechlorinated organic waste usually has a calorific value of about 4000 to 4500 kcal / kg, when the decomposition rate of the organic matter contained in the dechlorinated organic waste exceeds 20% by mass in the heat drying step, Correspondingly, the calorific value is reduced by 20% by mass or more, and the value as a fuel is significantly impaired.
In addition, even when this dechlorinated organic waste is dried or heat-dried only with fermentation heat, the decomposition rate of the organic matter contained in the dechlorinated organic waste exceeds 20% by mass, and similarly has value as a fuel. It will be seriously damaged.
On the other hand, when dechlorinated organic waste is dried or heat-dried only by natural energy such as solar heat or wind power, it is difficult to dry it in winter or cold regions.

  In the above methods (1) and (2), both natural energy such as solar heat and wind power and fermentation heat generated in the fermentation process of dechlorinated organic waste are used in combination. By adjusting the amount of energy and the amount of heat generated in the fermentation process of dechlorinated organic waste, the moisture content of the obtained dry dechlorinated organic waste is adjusted to 35% by mass or less, and dechlorinated organic waste The decomposition rate of the organic matter contained in is suppressed to 20% by mass or less, and a sufficient calorific value as fuel is ensured. Thereby, it is possible to produce a biomass fuel having a stable and useful calorific value.

The dry dechlorinated organic waste often has a relatively large shape such as a spherical shape, a lump shape, or a plate shape when it is simply dried or heated and dried. Depending on the application, this shape may be used as it is. However, when used in cement firing facilities, etc., any one or more of classification, pulverization, and pulverization may be performed using the pulverizer 23 in order to improve combustion efficiency. To form particles having a diameter of 10 mm or less.
Dry dechlorinated organic waste taken out from one or more of the fermenting equipment 22A, the sun drying equipment 21B, and the pulverizer 23 is carried into the storage 24, and sorted and stored according to specifications and varieties.

The dry dechlorinated organic waste thus obtained has an extremely low chlorine concentration of 3000 ppm or less, a moisture content of 35 mass% or less, and a decomposition rate of organic substances of 20 mass% or less. Dry dechlorinated organic waste having a high calorific value can be obtained easily and inexpensively. Therefore, this dry dechlorinated organic waste can be effectively used as a biomass fuel with high combustion efficiency.
Since the dry dechlorinated organic waste obtained in this way has a high calorific value, it can be effectively used as a cement firing fuel by putting it in the kiln bottom of a cement kiln of a cement firing facility. Without adverse effects on cement operation and quality.

"Biomass fuel"
The biomass fuel of the present embodiment is a biomass fuel obtained by removing chlorine and / or chlorine compounds contained in the above high water content organic waste and drying or heat drying, and the chlorine concentration is preferably 3000 ppm or less. More preferably, it is 2000 ppm or less, More preferably, it is 1000 ppm or less.
The moisture content is preferably 35% by mass or less, more preferably 30% by mass or less, and still more preferably 20% by mass or less.
Further, the decomposition rate of the organic substance is preferably 20% by mass or less, more preferably 15% by mass or less, and still more preferably 10% by mass or less.

This biomass fuel is subjected to dehydration treatment on the high water content organic waste, thereby removing chlorine and / or chlorine compounds contained in the high water content organic waste to obtain dechlorinated organic waste, The dechlorinated organic waste is subjected to drying or heating drying with natural energy or fermentation heat energy, and drying or heating drying with natural energy or fermentation heat energy, in order to reduce the chlorine concentration. It can be obtained by making it a dry dechlorinated organic waste having 3000 ppm or less, a moisture content of 35% by mass or less, and a decomposition rate of organic matter of 20% by mass or less.
It is preferable to crush the dried dechlorinated organic waste into particles having a diameter of 10 mm or less using a crushing means such as a kneader or a roll mill because the combustion efficiency is improved.

As described above, according to the fueling method of the present embodiment, dry dechlorinated organic waste having an extremely low chlorine concentration and moisture content and a high calorific value can be obtained easily and inexpensively. Therefore, this dry dechlorinated organic waste can be effectively used as a biomass fuel with high combustion efficiency.
Moreover, since natural energy such as solar heat or fermentation heat energy of organic waste is used for drying or heating and drying, and fossil fuel is not used, the energy saving effect is large and the environmental load is small.
Since the dry dechlorinated organic waste obtained in this way has a high calorific value, it can be effectively used as a cement firing fuel by putting it in the kiln bottom of a cement kiln of a cement firing facility. Without adverse effects on cement operation and quality.

According to the biomass fuel of the present embodiment, the chlorine concentration is 3000 ppm or less, the moisture content is 35 mass% or less, and the decomposition rate of the organic matter is 20 mass% or less, so that a sufficient calorific value as biomass fuel can be secured. And can be effectively used as a fuel having a high calorific value (high combustion efficiency).
In addition, since the chlorine concentration is as low as 3000 ppm or less, there is no risk of problems such as corrosion or blockage of pipes in the combustion equipment, etc., and even when it is put into cement firing equipment, the operation and quality of the cement There is no risk of adverse effects.
This biomass fuel can be used as a wide range of fuels for waste power generation, waste boilers, etc., as well as cement firing equipment fuels.

  EXAMPLES Hereinafter, although an Example and a comparative example demonstrate this invention concretely, this invention is not limited by these Examples.

Example 1
A high water content organic waste containing 100 kg of pig feces having a water content of 90% by mass, a chlorine concentration of 8000 ppm, a calorific value of 4500 kcal / kg and demineralized tap water is dehydrated using a dehydrator, and the water content is 70 A cake of 33 kg by mass and a chlorine concentration of 980 ppm was obtained.
Next, this cake was carried into a sun drying facility, and sun drying was performed using solar heat and wind power to obtain dry dechlorinated pig feces having a moisture content of 55% by mass, a chlorine concentration of 980 ppm, and a calorific value of 4500 kcal / kg.

Next, this dry dechlorinated pork droppings is carried into a horizontal open-type compost house and dried using fermentation heat to obtain 12 kg of dry dechlorinated pork droppings having a moisture content of 25% by mass, a chlorine concentration of 1120 ppm and a calorific value of 3830 kcal / kg. It was. In addition, the decomposition rate of the organic substance by fermentation heat was 15 mass%.
Moreover, when this dry dechlorinated swine dung was injected as fuel into the kiln bottom of the cement kiln of the cement firing facility, the combustion efficiency of the cement kiln was not lowered, and the cement operation and quality were not affected.

(Comparative Example 1)
A high water content organic waste containing 100 kg of pig feces having a water content of 90% by mass, a chlorine concentration of 8000 ppm, a calorific value of 4500 kcal / kg and demineralized tap water is dehydrated using a dehydrator, and the water content is 70 A cake of 33 kg by mass and a chlorine concentration of 980 ppm was obtained.
Next, this cake was carried into a horizontal open-type compost house and dried using fermentation heat to obtain 7 kg of dry dechlorinated pork droppings.

The dry dechlorinated pork droppings had a water content of 25% by mass, a chlorine concentration of 1790 ppm, a calorific value of 2480 kcal / kg, and a decomposition rate of organic matter by fermentation heat of 45% by mass.
In addition, when this dry dechlorinated swine dung was introduced into the kiln bottom of the cement kiln of the cement firing facility as a fuel, the combustion efficiency of the cement kiln was lowered, and the cement operation was greatly affected.

(Example 2)
A high water content organic waste containing 100 kg of cow dung having a water content of 90% by mass, a chlorine concentration of 9000 ppm, a calorific value of 4200 kcal / kg and demineralized tap water is dehydrated using a dehydrator, and the water content is 70 mass. %, 33 kg of a chlorine concentration of 1110 ppm was obtained.
Next, this cake was carried into a sun drying facility and sun dried using solar heat and wind power to obtain dry dechlorinated cow dung having a moisture content of 50 mass%, a chlorine concentration of 1110 ppm, and a calorific value of 4200 kcal / kg.

Next, this dried dechlorinated cow dung is put into a vertical closed fermenter and heated and dried using fermentation heat and wind power, and dried dechlorinated cow dung having a moisture content of 25 mass%, a chlorine concentration of 1260 ppm, and a calorific value of 3570 kcal / kg is obtained. Obtained. In addition, the decomposition rate of the organic substance by fermentation heat was 15 mass%.
Moreover, when this dry dechlorinated cow dung was introduced as fuel into the kiln bottom of the cement kiln of the cement firing facility, the combustion efficiency of the cement kiln was not lowered, and the cement operation and quality were not affected.

(Comparative Example 2)
A high water content organic waste containing 100 kg of cow dung having a water content of 90% by mass, a chlorine concentration of 9000 ppm, a calorific value of 4200 kcal / kg and demineralized tap water is dehydrated using a dehydrator, and the water content is 70 mass. %, 33 kg of a cake having a chlorine concentration of 980 ppm was obtained.
Next, the cake was subjected to solar drying for 300 days to obtain dry dechlorinated cow dung.
This dry dechlorinated cow dung had a very high water content of 40% by mass and could not be used as a cement burning fuel.

It is a schematic diagram which shows the fueling equipment used for the fueling method of the high water content organic waste of one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Discharge source 2 Desalination equipment 3 Fuelization equipment 11 Primary tank 12 Primary solid-liquid separator 13 Adjustment tank 14 Primary aeration tank 15 Secondary solid-liquid separator 16 Secondary aeration tank 17 Membrane immersion tank 18 Dehydration processing equipment 19 Treated water receiving tank 21A, 21B Sun drying equipment 22A, 22B Fermentation equipment 23 Crusher 24 Storage

Claims (4)

A method for fueling high water content organic waste containing either or both of livestock excrement and food waste,
By dehydrating the high water content organic waste, chlorine and / or chlorine compounds contained in the high water content organic waste are removed to obtain dechlorinated organic waste,
Next, the dechlorinated organic waste is sequentially subjected to drying or heating drying by either one of natural energy or fermentation heat energy, and drying or heating drying by any one of the natural energy or fermentation heat energy. A method for converting a high water content organic waste into a fuel, characterized in that it is a dry dechlorinated organic waste having a chlorine concentration of 3000 ppm or less, a water content of 35% by mass or less, and an organic matter decomposition rate of 20% by mass or less.   2. The method for fuelizing a high water content organic waste according to claim 1, wherein the water content of the high water content organic waste is 60% by mass or more.   The method for fuelizing a high water content organic waste according to claim 1 or 2, wherein the dry dechlorinated organic waste is subjected to any one or more of classification, pulverization, and pulverization. A biomass fuel obtained by removing chlorine and / or chlorine compounds contained in a high water content organic waste containing either or both of livestock excrement and food waste, and drying or heat drying,
A biomass fuel characterized by having a chlorine concentration of 3000 ppm or less, a water content of 35% by mass or less, and an organic matter decomposition rate of 20% by mass or less.

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