JP2009242636A - Method for converting high water content organic waste into fuel and biomass fuel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for converting a high water content organic waste into fuel capable of reducing a chlorine concentration and a water content of the high water content organic waste at low cost, capable of securing high heat generation and also having a high energy saving effect and to provide a biomass fuel. <P>SOLUTION: In the method for converting the high water content organic waste into the fuel, a dried dechlorinated organic waste having a chlorine concentration of ≤3,000 ppm and also a water content of ≤30 mass% is obtained by subjecting the high water content organic waste containing either one or both of a livestock excreta and a foodstuff waste to a dehydrating treatment by using a dehydrator 2, then the dried dechlorinated organic waste is obtained by performing heat exchange between a combustion exhaust gas caused when the low water content organic waste is incinerated at an incineration furnace 3 and steam by using a heat exchanger 4, and performing drying or heat drying of the dechlorinated organic waste by introducing a superheated steam removed from the heat exchanger 4 to a drier 5. <P>COPYRIGHT: (C)2010,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. Energy saving effect is achieved by effectively using the flue gas generated when incineration of low moisture content organic waste, and the moisture content of high moisture content organic waste containing a large amount of water. A high water content organic waste fueling method that can secure a high calorific value, and a high water content organic waste with low chlorine concentration and water content to ensure a high calorific value In addition, the present invention relates to a biomass fuel that has a great energy saving effect.

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 30% 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.
In addition, these livestock excreta are dehydrated and dried using natural energy or heat of fermentation to produce biomass fuel. However, natural energy is affected by the weather, so stable energy supply is difficult. The biomass fuel itself has a variation (20 to 50%) in moisture content for each source and for each season. Therefore, using natural energy or heat of fermentation for drying is preferable from the viewpoint of energy saving effect, but has a problem in terms of stable supply of energy and quality stability as a fuel in the drying process.

Further, this biomass fuel cannot stably secure a calorific value (3200 cal / kg or more) effective as a fuel, and is very problematic as an industrial 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. Moreover, it is possible to reduce the chlorine concentration and water content of organic waste with a high water content that contains a large amount of water at a low cost, and as a result, a high heat generation amount can be secured, and the high water content has a large energy saving effect. The purpose is to provide a method for converting organic waste into fuel, and a biomass fuel that has a high chlorine content and moisture content of organic waste with a high water content, can secure a high calorific value, and has a large energy saving effect. To do.

  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 high water content organic waste can be removed to obtain dechlorinated organic waste with a very low chlorine concentration of 3000 ppm or less. Low-cost dry dechlorinated organic waste having a high calorific value with a chlorine concentration of 3000 ppm or less and a water content of 30% by mass or less by drying or heat-drying using combustion exhaust gas generated when incinerating the waste In addition, it has been found that the energy saving effect is great, and further, this dry dechlorinated organic waste is used as an energy source for biomass fuel, and further, cement burning. Can be effectively used as a biomass fuel of equipment, yet it 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 Drying or heat drying is performed using combustion exhaust gas generated when incineration of low water content organic waste, and it is set as dry dechlorinated organic waste having a chlorine concentration of 3000 ppm or less and a water content of 30% by mass or less. Features.

In this method of converting high water content organic waste into fuel, dehydration of the high water content organic waste removes 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 dried or heated using the combustion exhaust gas generated when the low water content organic waste is incinerated to obtain a dry dechlorinated organic waste having a water content of 30% by mass or less. .
Since this dry dechlorinated organic waste has a low moisture content of 30% by mass or less, a high calorific value is ensured.
Furthermore, by performing drying or heat drying of dechlorinated organic waste using combustion exhaust gas generated when incineration of low water content organic waste, the cost for fuel conversion is kept low, and the energy saving effect is greatly increased. Become.

In this way, the chlorine concentration is 3000 ppm or less and the moisture content is 30% by mass or less by performing the drying or heating drying of the dechlorinated organic waste using the combustion exhaust gas generated when the low-moisture content organic waste is incinerated. The dry dechlorinated organic waste can be obtained at low cost, and the energy saving effect is great.
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 dechlorinated organic waste may be dried or heat-dried using a heat medium exchanged with the combustion exhaust gas.
In this high water content organic waste fueling method, the chlorine concentration is 3000 ppm or less and the water content is 30 mass by drying or heat drying the dechlorinated organic waste using a heat medium heat exchanged with the combustion exhaust gas. % Or less of dry dechlorinated organic waste can be obtained at low cost by using an apparatus having a simple configuration, and the energy saving effect is great.

The heat medium is preferably superheated steam.
Superheated steam has a large heat capacity, and dechlorinated organic waste can be dried or heat-dried in a relatively short time.

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.

  The biomass fuel of the present invention is a dechlorinated organic waste 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. A biomass fuel obtained by drying or heat-drying using combustion exhaust gas generated when incinerating a low water content organic waste, characterized in that the chlorine concentration is 3000 ppm or less and the water content is 30% by mass or less. To do.

In this biomass fuel, the chlorine concentration is set to 3000 ppm or less and the moisture content is set to 30 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.
Since this biomass fuel has a low moisture content of 30% by mass or less, a high calorific value is ensured.
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 preferably has an average particle size of 10 mm or less.
In this biomass fuel, when the average particle size is 10 mm or less, the agglomerates that have been a problem in the past are not included, and combustion efficiency can be increased.

  According to the method for fuelizing high water content organic waste of the present invention, dehydration treatment of high water content organic waste removes chlorine and / or chlorine compounds contained in the organic waste and dechlorinates it. Then, the dechlorinated organic waste is dried or heat-dried using the combustion exhaust gas generated when the low-water content organic waste is incinerated, and the chlorine concentration is 3000 ppm or less and the water content is 30 mass. % Or less of dry dechlorinated organic waste, a dry dechlorinated organic waste having a very low chlorine concentration and moisture content and a high calorific value can be obtained at low cost. Therefore, biomass fuel with high combustion efficiency can be provided.

Further, since drying or heat drying is performed using combustion exhaust gas generated when incineration of low water content organic waste, it is not necessary to use fossil fuel, energy saving effect can be enhanced, and 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, since the chlorine concentration is 3000 ppm or less and the water content is 30 mass% or less, the biomass has a high calorific value, high combustion efficiency, large energy saving effect, and low environmental load. 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 method for organic waste with high water content"
The method for fuelizing a high water content organic waste according to the present embodiment is a method for fueling a high water content organic waste containing either one or both of livestock excrement and food waste. By dehydrating the organic waste, the chlorine and / or chlorine compounds contained in the high water content organic waste are removed to form dechlorinated organic waste, and then the dechlorinated organic waste is dried or dried. This is a method in which drying by heating is performed using combustion exhaust gas generated when incineration of a low water content organic waste, and a dry dechlorinated organic waste having a chlorine concentration of 3000 ppm or less and a water content of 30% by mass or less.

Next, a method for converting this high water content organic waste into fuel will be described in detail with reference to FIG.
FIG. 1 is a schematic diagram showing a fueling facility used in the method for fuelizing high water content organic waste according to the present embodiment, in which 1 is a discharge source, 2 is a dehydrator, 3 is an incinerator, 4 Is a heat exchanger, 5 is a dryer, 6 is a pulverizer, and 7 is a waste water treatment device.

  Here, the high water content organic waste means an organic waste containing chlorine and / or a chlorine compound 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. Yes, for example, excrement-containing treated water containing pig manure, cattle manure, chicken manure, etc., and a large amount of washing water discharged when washing livestock such as pig houses, cow houses, poultry houses, etc., and pig manure When washing livestock manure, such as cow manure and chicken manure into equal or more than 20 times the amount of water, and stirring the livestock manure containing slurry, used lunch containers and food containers by washing with water Examples include food waste-containing treated water containing discharged food and a large amount of water. These can be used singly or in combination of two or more as required.

The low water content organic waste is an organic waste having a water content of 50% by mass or less, more preferably 40% by mass or less, and further preferably 30% by mass or less. It is not necessary to have a low chlorine concentration.
The low water content organic waste is preferably animal dung having a moisture content of 50% by mass or less and a calorific value of 2500 kcal / kg or more on a dry basis (dry state). For example, broiler chicken dung, broiler chicken dung and egg collection chicken dung are dried. Dry chicken dung, dried pig dung, dried cow dung, fermented chicken dung, fermented pig dung, fermented cow dung and the like. These can be used alone or in admixture 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 dehydrator 2 dehydrates high water content organic waste containing chlorine and / or chlorine compounds into a solid cake (dechlorinated organic waste) with a low chlorine concentration and a solid-liquid solution with moisture with a high chlorine concentration. Any type of dehydrator such as a filter, a pressure filter, a centrifugal dehydrator, or a screw press can be used, and a screw press capable of solid-liquid separation in a short time is particularly preferable.
The incinerator 3 may be any device that incinerates the low water content organic waste, and the type and form of the device are not limited.

The heat exchanger 4 circulates a heat medium such as superheated steam between the heating pipe and the cooling pipe, thereby exchanging the heat energy of the combustion exhaust heat with the heat energy of the heat medium (heat cycle). It is a device to perform.
The dryer 5 is a device that dries or heat-drys the solid cake (dechlorinated organic waste) taken out from the dehydrator 2 using the heat energy of the heat medium taken out from the heat exchanger 4.

The pulverizer 6 performs any one or more of classification, pulverization, and pulverization on the solid dried cake (dried organic waste) taken out from the dryer 5 to obtain an average particle diameter. Is an apparatus having a classifying function to form particles of 10 mm or less, and an automatic mortar, a stamper, a kneader, a roll mill and the like equipped with a sieve, a classifier and the like are preferably used.
The waste water treatment device 7 is a device that performs a predetermined waste water treatment on the waste water from the dehydrator 2 and discharges the treated waste water.

Next, a method for converting high water content organic waste into fuel using this high water content organic waste fueling facility will be described.
The high water content organic wastes such as the above-mentioned excrement containing treated water and food waste containing treated water discharged from the discharge source 1 are dehydrated using the dehydrator 2, and the water content is as low as possible and the chlorine concentration is as low as possible. Solid-liquid separation is performed into a solid cake (dechlorinated organic waste) C and moisture W having a high chlorine concentration.

This high water content organic waste is effectively desalted by solid-liquid separation, has a chlorine concentration of 3000 ppm or less, preferably 2000 ppm or less, and a moisture content of 85% by mass or less, more preferably 80% by mass. % Or less, more preferably 75% by mass or less of a solid cake (dechlorinated organic waste) C.
In order to reduce the amount of chlorine and / or chlorine compound contained in the cake C and reduce the amount of water used, it is essential to have a low water content. If the cake C has a low water content, the amount of heat at the time of subsequent drying or heat drying can be reduced, which is preferable.
This cake C is carried into the dryer 5 and dried or heat-dried.
On the other hand, the water W separated into solid and liquid by the dehydrator 2 is subjected to a predetermined wastewater treatment by the wastewater treatment device 7 and then discharged to an external drainage channel or the like.

On the other hand, the above-mentioned low water content organic waste is incinerated using the incinerator 3, and the heat energy of the exhaust gas generated during the incineration is exchanged with a heat medium such as water vapor by the heat exchanger 4. As a result, the heat medium such as water vapor becomes a high-temperature heat medium such as superheated steam at about 150 ° C. to 500 ° C.
Moreover, since the incineration ash generated during the incineration process contains a large amount of phosphorus, nitrogen, and the like, it is effectively used as a fertilizer, a moisture adjusting agent for compost, and the like.

The high-temperature heat medium is conveyed to the dryer 5 to heat the cake C and dry it. On the other hand, the heat medium is cooled by heat exchange with the cake C to become a low temperature of about 100 ° C. to 200 ° C., and is again heat exchanged with the exhaust gas generated during the incineration treatment by the heat exchanger 4, and 150 ° C. to 500 ° C. It becomes a high temperature of about ℃.
In this way, the heat medium circulates between the heat exchanger 4 and the dryer 5, thereby exchanging heat energy of the exhaust gas generated during the incineration treatment of the low water content organic waste, thereby drying the dryer 5. The cake C inside is heated and dried to obtain a dry dechlorinated organic waste having a chlorine concentration of 3000 ppm or less and a water content of 30% by mass or less.
On the other hand, water vapor generated when drying in the dryer 5 is introduced into the heat exchanger 4 and reused as a heat medium.

The dry dechlorinated organic waste obtained in this way has a low chlorine concentration of 3000 ppm or less and a high calorific value, so that it can be used as various industrial fuels.
Moreover, when it is necessary to adjust the moisture content of this dry dechlorinated organic waste within a predetermined range, for example, 20% by mass or less, it is possible to adjust the heating / drying time of the cake C in the dryer 5. .

The dried dechlorinated organic waste often has a large shape such as a spherical shape, a block shape (block shape), a plate shape, etc., simply by drying. Depending on the application, the shape may be used as it is. However, when used in cement firing equipment, etc., this pulverizer is used after classification using a sieve or a classifier provided in the pulverizer 6 in order to improve combustion efficiency. It is good to grind | pulverize or crush by 6 and to make it an average particle diameter into a particulate form of 10 mm or less.
The dry dechlorinated organic waste obtained in this way has a chlorine concentration of 3000 ppm or less, a moisture content as low as 30% by mass or less, a high calorific value, and an average particle size of 10 mm or less. Therefore, it is effectively used as a cement firing fuel by being put into the kiln bottom of a cement kiln of a cement firing facility.

"Biomass fuel"
The biomass fuel of the present embodiment is produced when chlorine and / or chlorine compounds contained in the above high water content organic waste are removed and the resulting dechlorinated organic waste is incinerated with low water content organic waste. A biomass fuel obtained by drying or heat-drying using combustion exhaust gas, and its chlorine concentration is preferably 3000 ppm or less, more preferably 2000 ppm or less, and still more preferably 1000 ppm or less.
The water content is preferably 30% by mass or less, more preferably 25% by mass or less, and still more preferably 20% by mass or less.

This biomass fuel is obtained by drying or heat-drying a cake made of the above-mentioned dechlorinated organic waste, pulverizing or crushing as necessary, and a dry dechlorinated organic having a chlorine concentration of 3000 ppm or less and a water content of 30% by mass or less. It can be obtained as waste.
This biomass fuel can be used as a wide range of fuels for cement production, biomass power generation, biomass boilers, and the like.

  As described above, according to the method for fuelizing a high water content organic waste according to the present embodiment, the dehydration treatment of the high water content organic waste allows the chlorine contained in the high water content organic waste and / Or remove chlorine compounds to form dechlorinated organic waste, and then dry or heat dry this dechlorinated organic waste using the combustion exhaust gas produced when incineration of low water content organic waste, Since it is a dry dechlorinated organic waste having a concentration of 3000 ppm or less and a water content of 30% by mass or less, a biomass fuel having a very low chlorine concentration and water content and a high calorific value can be obtained at low cost. Therefore, biomass fuel with high combustion efficiency can be provided.

Further, since drying or heat drying is performed using combustion exhaust gas generated when incineration of low water content organic waste, it is not necessary to use fossil fuel, energy saving effect can be enhanced, and environmental load is small.
Moreover, when this dry dechlorinated organic waste is injected as fuel into the cement firing facility, the combustion efficiency in the cement firing facility can be increased, and there is no possibility of adversely affecting the cement operation and quality.

According to the biomass fuel of the present embodiment, chlorine and / or chlorine compounds contained in the high water content organic waste are removed, and the resulting dechlorinated organic waste is produced when the low water content organic waste is incinerated. Dry or heat-dried using combustion exhaust gas, chlorine concentration is 3000ppm or less and moisture content is 30% by mass or less, so it has a high calorific value, high combustion efficiency, great energy saving effect, and environmental impact 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.

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

(Example)
Broiler chicken manure having a water content of 45% by mass and a chlorine concentration of 6500 ppm was used as the low water content organic waste.
This broiler chicken manure was incinerated in an incinerator (incineration amount: 0.7 t / h). The exhaust gas (840 ° C.) generated at this time was introduced into a heat exchanger and used as a drying heat source for the dryer. The temperature of the exhaust gas discharged from this heat exchanger was 300 ° C.
Moreover, incineration ash of 0.04 t / h was obtained when incinerated. It was confirmed that this incinerated ash can be used effectively as a fertilizer.

On the other hand, three times the amount of water (5.4 t / h) was added to this broiler chicken manure 1.8 t / h, and mixed and stirred to obtain a slurry.
Subsequently, this slurry was dehydrated using a dehydrator to obtain a cake-like dechlorinated broiler chicken manure 2.0 t / h having a chlorine concentration of 1000 ppm and a water content of 60% by mass.
Next, the dechlorinated broiler chicken manure is carried into a dryer and dried using the exhaust gas discharged from the heat exchanger, and the chlorine concentration is 1000 ppm, the moisture content is 15% by mass, and the calorific value (dry base (dry state)). A dry dechlorinated chicken dung of 0.9 t / h at 4000 kcal / kg was obtained.
In this dry dechlorinated chicken manure, the variation in moisture content depending on the sampling location was small, and it was a high biomass fuel.

Water vapor generated when drying this dechlorinated broiler chicken manure was introduced into the heat exchanger and heat exchanged with the exhaust gas (840 ° C.) generated from the incinerator, resulting in 350 ° C. superheated steam. When the dechlorinated broiler chicken manure was dried again using this superheated steam, the temperature of the steam discharged from the dryer (superheated) was reduced to 150 ° C.
Of this steam, surplus steam was introduced into the incinerator and subjected to deodorization treatment.
Moreover, when the above-mentioned dried dechlorinated chicken manure was blown from the burner at the front of the kiln of the cement kiln of the cement firing equipment and used as a fuel for producing cement, an effective fuel effect could be confirmed. It was also confirmed that there was no adverse effect on cement operation and quality.

(Comparative example)
Three times the amount of water (5.4 t / h) was added to broiler chicken manure 1.8 t / h, mixed and stirred to obtain a slurry.
Subsequently, this slurry was dehydrated using a dehydrator to obtain a cake-like dechlorinated broiler chicken manure 2.0 t / h having a chlorine concentration of 1000 ppm and a water content of 60% by mass.
Next, 2.0 tons of this dechlorinated broiler chicken manure was sun-dried for 45 days, and dried dechlorinated chicken manure having a chlorine concentration of 1000 ppm, a water content of about 40% by mass, and a calorific value (dry base (dry state)) of 4000 kcal / kg. 275 t was obtained.

This dry dechlorinated chicken manure has a high moisture content, and the latent heat of vaporization of the water is lost during firing, which poses a problem in quality as a biomass fuel.
Further, in order to make the moisture content 30% by mass or less, further long-time sun drying is required, which causes a practical problem.

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 Source 2 Dehydrator 3 Incinerator 4 Heat exchanger 5 Dryer 6 Pulverizer 7 Waste water treatment device C Cake W Moisture

Claims (7)

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, this dechlorinated organic waste is dried or heat-dried using the combustion exhaust gas generated when the low water content organic waste is incinerated, and the chlorine content is 3000 ppm or less and the moisture content is 30% by mass or less. A method for converting a high water content organic waste into fuel, characterized in that the organic waste is chlorinated organic waste.   2. The method for fuelizing a high water content organic waste according to claim 1, wherein the dechlorinated organic waste is dried or heat-dried using a heat medium heat-exchanged with the combustion exhaust gas.   3. The method for fuelizing high water content organic waste according to claim 2, wherein the heat medium is superheated steam.   4. The method for fuelizing a high water content organic waste according to claim 1, 2 or 3, wherein the water content of the high water content organic waste is 60% by mass or more.   5. The high water content organic waste according to claim 1, wherein the dry dechlorinated organic waste is subjected to any one or more of classification, pulverization, and pulverization. Fueling method. Chlorine and / or chlorine compounds contained in high water content organic waste containing either or both livestock excrement and food waste are removed, and the resulting dechlorinated organic waste is treated with low water content organic waste. A biomass fuel that is dried or heat-dried using combustion exhaust gas generated when incinerated,
A biomass fuel having a chlorine concentration of 3000 ppm or less and a water content of 30% by mass or less.   The biomass fuel according to claim 6, wherein the average particle size is 10 mm or less.

Images