JP5040594B2 - Method for reducing moisture content of dehydrated organic waste, method for converting low moisture content organic waste into fuel, biomass fuel, and facility for reducing moisture content of dehydrated organic waste - Google Patents

Description

  The present invention relates to a method for reducing moisture content of dehydrated organic waste, a method for converting low moisture content organic waste into fuel, a biomass fuel, and a facility for reducing moisture content of dehydrated organic waste, and more particularly, chicken dung, cow dung, pig dung, etc. The water content of dehydrated organic waste obtained by dehydrating organic waste slurries containing livestock excreta including animal waste and organic waste such as food waste discarded at department stores, supermarkets, convenience stores, etc. A method for reducing the water content of dehydrated organic waste that can be reduced, and drying or heat drying the low water content organic waste obtained by this water content reduction method as a biomass fuel having a low chlorine concentration and a low water content. Low water content organic waste fuel method that can be used, biomass fuel using this low water content organic waste, and dehydration with reduced water content of dehydrated organic waste It relates to the water content reduction equipment of waste.

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.
FIG. 7 is a cross-sectional view showing an example of a treatment facility equipped with a moisture content reduction facility for reducing the moisture content of a dewatered cake obtained by dewatering a pig manure slurry containing pig feces and washing water discharged from a conventional pig house. In the figure, 1 is a dehydrator that dehydrates swine dung slurry to form a solid dehydrated cake (dehydrated organic waste) C, 2 is the water content of the dehydrated cake C provided on the take-out side of the dehydrator 1 It is equipment for reducing moisture content to be reduced.
The moisture content reduction equipment 2 reduces the moisture content of the dehydrated cake C by allowing the dehydrated cake C to stand for a long period of time and air-dry, thereby reducing the moisture content of the storage cabinet 3 made of stainless steel or hard plastic. A part of the water is removed to serve as a take-out port for taking out a dehydrated cake having a low water content.

In this equipment, the solid dehydrated cake C having a moisture content of 80% by mass or more and 90% by mass or less by dehydration treatment is left to stand for a long time in the moisture content reduction equipment 2 and then naturally dried. The dehydrated cake C ′ has a water content of 50% by mass or more and 75% by mass or less.
The dehydrated cake C ′ thus obtained is then dried or heat-dried, and further pulverized or crushed into particles with a diameter of 10 mm or less, and supplied to a cement firing facility or the like for effective use as a biomass fuel. Is done.

On the other hand, the energy use of livestock excreta currently used includes the use of chicken manure as fuel for power generation and waste boilers, or the fermentation of cattle and swine manure into methane to produce biogas mainly composed of methane gas. And using this biogas as fuel.
Various methods and facilities 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 Livestock dung drying and incineration equipment having a magnet-excited vibrating screen that exposes foreign matters mixed with metals and removes these foreign matters via magnets (Patent Document 2).
In this facility, 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, in the conventional pig manure slurry treatment facility, in order to reduce the moisture content of the dehydrated cake to a desired value, it is necessary to leave it to stand for a long period of time in the moisture content reduction equipment and to dry naturally. There was a problem that the processing capacity of the facility could not be increased.
On the other hand, various methods and facilities for effectively using organic waste such as livestock excrement and food waste have been proposed. However, these methods and facilities also have the following problems.
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, combustion equipment may corrode due to this chlorine component, or low melting point chlorine compounds may be generated, causing various troubles such as blockage at various locations 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 to solve the above problems, reduced poultry, cattle manure, the moisture content of the dehydrated organic waste chlorine content such as swine manure contains high livestock excrement, chlorine concentration by but be less low water content organic waste 3000 ppm, can be effectively utilized as an energy source, more water content reduction method of dewatering organic waste can be effectively used as a fuel for a cement burning facility Another object of the present invention is to provide a method for converting a low water content organic waste into a fuel, a biomass fuel, and a water content reduction facility for dehydrated organic waste.

As a result of intensive studies to solve the above problems, the present inventors have obtained a water content of 80% by mass or less obtained by dehydrating an organic waste slurry containing an organic waste containing livestock excrement and water. The solid dehydrated organic waste is introduced on a water leaching means for leaching moisture from the hydrated material or on an inclined surface inclined with respect to one direction in the horizontal plane for leaching moisture from the hydrated material. If the water contained in the dehydrated organic waste is leached by means or an inclined surface and discharged to the outside, a low water content organic waste having a chlorine concentration of 3000 ppm or less can be obtained. If the waste is dried or heat-dried, it can be used effectively as an energy source for biomass fuel, etc., and further as a biomass fuel for cement burning equipment. It found that there is no possibility of adversely affecting the cement quality, which resulted in the completion of the present invention.

That is, in the first dehydrated organic waste water content reduction method of the present invention, the water content obtained by dehydrating an organic waste slurry containing organic waste containing livestock excrement and water is 80% by mass or less. A method for reducing the water content of solid dehydrated organic waste and producing a low water content organic waste having a chlorine concentration of 3000 ppm or less , wherein the dehydrated organic waste is leached from the water-containing material. It is characterized by leaching out the water contained in the dehydrated organic waste by allowing it to stand and introducing it into a low moisture content organic waste having a chlorine concentration of 3000 ppm or less .

In this method, solid dehydrated organic waste having a moisture content of 80% by mass or less is introduced into a water leaching means for leaching moisture from the hydrated material, and the moisture contained in the dehydrated organic waste is leached and discharged. Thus, it becomes possible to further dehydrate the dehydrated organic waste only with a simple operation, and the organic waste has a lower water content than before. Further, by leaching the water contained in the dehydrated organic waste, chlorine and / or chlorine compounds are also removed at the same time , and the organic waste becomes a low water content having a chlorine concentration of 3000 ppm or less .
Therefore, this low water content organic waste can be effectively used as a biomass fuel having a low water content and a low chlorine concentration.
In addition, since the chlorine concentration is extremely low, there is no risk of problems such as corrosion or blockage of piping in combustion facilities, etc., even when this low water content organic waste is thrown into the cement firing facility as fuel. There is no risk of adverse effects on cement operation and quality.
Further, by setting the moisture content of the dehydrated organic waste to 80% by mass or less, it becomes possible to reduce the moisture content of the obtained low moisture content organic waste, and therefore when used as a fuel. However, the thermal energy generated at the time of combustion is not lost to the latent heat of vaporization of the water contained in the dehydrated organic waste, and the energy as fuel can be used effectively.

The second method for reducing the moisture content of dehydrated organic waste according to the present invention is a solid form having a moisture content of 80% by mass or less obtained by dehydrating an organic waste slurry containing organic waste containing livestock excrement and water. Is a method of reducing the water content of dehydrated organic waste to a low water content organic waste having a chlorine concentration of 3000 ppm or less , wherein the dehydrated organic waste is in a horizontal plane for leaching moisture from the water-containing material. Introducing on the inclined surface inclined with respect to one direction, leaching the moisture contained in the dehydrated organic waste and draining it from the lower end side of the inclined surface , low moisture content organic waste having a chlorine concentration of 3000 ppm or less and characterized in that it.

In this method, dehydrated organic waste is introduced onto an inclined surface inclined with respect to one direction in a horizontal plane for leaching moisture from the water-containing substance, and the moisture contained in the dehydrated organic waste is leached to be inclined. By draining from the lower end side of the surface, the dehydrated organic waste can be further dehydrated by a simple operation, resulting in an organic waste having a lower water content than before. Further, by leaching the water contained in the dehydrated organic waste, chlorine and / or chlorine compounds are also removed at the same time , and the organic waste becomes a low water content having a chlorine concentration of 3000 ppm or less . Therefore, this low water content organic waste can be effectively used as a biomass fuel having a low water content and a low chlorine concentration.
In addition, since the chlorine concentration is extremely low, there is no risk of problems such as corrosion or blockage of piping in combustion facilities, etc., even when this low water content organic waste is thrown into the cement firing facility as fuel. There is no risk of adverse effects on cement operation and quality.
Further, by setting the moisture content of the dehydrated organic waste to 80% by mass or less, it becomes possible to reduce the moisture content of the obtained low moisture content organic waste, and therefore when used as a fuel. However, the thermal energy generated at the time of combustion is not lost to the latent heat of vaporization of the water contained in the dehydrated organic waste, and the energy as fuel can be used effectively.

  The method for fuelizing low water content organic waste according to the present invention is a method for fueling low water content organic waste obtained by the method for reducing the water content of dehydrated organic waste according to the present invention. The water content organic waste is dried or heat-dried to obtain a dry organic waste having a chlorine concentration of 3000 ppm or less and a water content of 35% by mass or less.

In this fuel conversion method, the organic waste having a low water content is dried or heat-dried to obtain a dry organic waste having a chlorine concentration of 3000 ppm or less and a moisture content of 35% by mass or less. The water content and chlorine concentration are extremely low and the calorific value is high, so that it can be effectively used as a biomass fuel with high combustion efficiency.
In addition, even when this dry organic waste is fed as fuel to a cement firing facility, there is no possibility of adversely affecting cement operation and quality.

It is preferable that the heat source in the heat drying is one of solar heat, fermentation heat generated in the fermentation process of the organic waste, or both.
Heat drying using either or both of solar heat and fermentation heat generated in the fermentation process of organic waste makes it possible to heat and dry without using fossil fuels, and thus energy saving effect. Large and environmental load is small.

After drying or heat drying the low water content organic waste, it is preferable to perform any one or more of classification, pulverization, and pulverization.
The low water content organic waste usually has a relatively large shape such as a spherical shape, a block shape (block shape), a plate shape, etc. after drying or heat drying. Therefore, it is possible to obtain a granular material having a desired shape by performing any one or more of classification, pulverization, and pulverization on the dried or heat-dried low water content organic waste. .

The biomass fuel of the present invention is a biomass fuel obtained by drying or heat drying a low water content organic waste obtained by the water content reduction method of the first or second dehydrated organic waste of the present invention, and having a chlorine concentration. It is 3000 ppm or less and a moisture content is 35 mass% or less.

In this biomass fuel, since the chlorine concentration is 3000 ppm or less and the moisture content is 35 mass% or less, the thermal energy generated during combustion may be lost to the latent heat of vaporization of the water contained in the low moisture content organic waste. It becomes possible to make effective use of energy as fuel.
In addition, the chlorine concentration is low, so there is no risk of problems such as corrosion or blockage of piping, etc. even in combustion facilities, etc., and when it is put into cement firing facilities, it may adversely affect cement operation and quality. There is no.

The first dehydrated organic waste water content reduction facility of the present invention is a dehydrated organic having a moisture content of 80% by mass or less obtained by dehydrating an organic waste slurry containing organic waste containing livestock excrement and water. reducing the moisture content of the waste, a facility chlorine concentration to less low water content organic wastes 3000 ppm, the housing part for accommodating the dewatering organic waste, leach water from the dehydrating organic waste A water leaching means is provided, and a discharge means for discharging the water leached from the dehydrated organic waste to the outside is provided below or below the water leaching means, and the dehydrated organic waste is introduced into the water leaching means and allowed to stand. and, by draining by the discharging means the moisture contained in the dewatering organic waste leached by the water leaching means, the dehydrated organic waste chlorine concentration to less low water content organic waste 3000ppm And wherein the door.

In this moisture content reduction facility, water contained in the dehydrated organic waste is leached by the water leaching means and removed from the dehydrated organic waste, and the leached water is drained to the outside by the discharge means.
Thereby, it becomes possible to easily produce an organic waste having a low chlorine concentration and a low water content by a simple operation.

The water leaching means preferably includes at least one of a mesh member, a plate member having a plurality of holes, a rotating sieve, a swinging sieve, and a rotating sieve.
It is preferable that the mesh member or the plate member is inclined with respect to one direction in a horizontal plane.

The second dehydrated organic waste water content reduction facility of the present invention is a dehydrated organic having a water content of 80% by mass or less obtained by dehydrating an organic waste slurry containing organic waste containing livestock excrement and water. reducing the moisture content of the waste, a facility chlorine concentration to less low water content organic wastes 3000 ppm, at least a portion of the bottom surface of the housing part for accommodating the dewatering organic wastes, one horizontal plane An inclined surface inclined with respect to the direction is provided, and a discharge means for discharging moisture leached from the dehydrated organic waste to the outside is provided at a lower end portion or below the inclined surface, and the dehydrated organic waste is placed on the inclined surface. The dehydrated organic waste is leached out of the dehydrated organic waste, introduced into the discharge means through the inclined surface, and drained, whereby the dehydrated organic waste is discarded with a low water content and having a chlorine concentration of 3000 ppm or less. and things And wherein the door.

In this moisture content reduction facility, the moisture contained in the dehydrated organic waste is leached by the inclined surface, and flows down along the inclined surface to be removed from the dehydrated organic waste, and the leached moisture is discharged to the outside by the discharge means. .
Thereby, it becomes possible to easily produce an organic waste having a low chlorine concentration and a low water content by a simple operation.

According to a first moisture content reducing process of dehydrating organic waste of the present invention, a water content of 80 mass% or less of the dehydrated organic waste, to stand by introducing into the water leach means to leach water from water-containing material As a result, water contained in the dehydrated organic waste is leached and drained, so that an organic waste having a chlorine concentration of 3000 ppm or less and a low water content can be easily obtained. Therefore, this organic waste can be effectively used as a biomass fuel having a low water content and a low chlorine concentration.
Also, since the chlorine concentration is extremely low, there is no risk of trouble such as corrosion or blockage of piping etc. even in combustion facilities etc., even when this low water content organic waste is thrown into the cement firing facility as a fuel, There is no risk of adverse effects on cement operation and quality.

According to the second method for reducing the water content of dehydrated organic waste of the present invention, the dehydrated organic waste having a moisture content of 80% by mass or less is directed to one direction in a horizontal plane for leaching moisture from the water-containing material. Since it is introduced onto an inclined surface and the water contained in the dehydrated organic waste is leached and drained from the lower end side of the inclined surface, an organic waste having a chlorine concentration of 3000 ppm or less and a low water content can be easily obtained. be able to. Therefore, this organic waste can be effectively used as a biomass fuel having a low water content and a low chlorine concentration.
Also, since the chlorine concentration is extremely low, there is no risk of trouble such as corrosion or blockage of piping etc. even in combustion facilities etc., even when this low water content organic waste is thrown into the cement firing facility as a fuel, There is no risk of adverse effects on cement operation and quality.

According to the low water content organic waste fueling method of the present invention, the low water content organic waste obtained by the first or second dehydrated organic waste water content reducing method of the present invention is dried or heat-dried. In addition, since it is a dry organic waste having a chlorine concentration of 3000 ppm or less and a moisture content of 35 mass% or less, the organic waste has a low moisture content, a low chlorine concentration, a high calorific value, and a high combustion efficiency. The biomass fuel consisting of can be obtained easily and inexpensively.
Moreover, even if this biomass fuel is put into a cement firing facility, there is no possibility that the combustion efficiency is lowered, and there is no possibility that the operation and quality of the cement will be adversely affected.

According to the first dehydrating organic waste water content reduction facility of the present invention, the storage section for storing the dehydrated organic waste is provided with water leaching means for leaching moisture from the dehydrated organic waste, Since the discharge means for discharging the moisture leached from the dehydrated organic waste to the outside is provided below or below, the organic waste having a chlorine concentration of 3000 ppm or less and a low water content can be easily produced by a simple operation.

According to the moisture content reduction facility for the second dehydrated organic waste of the present invention, at least a part of the bottom surface of the storage unit that stores the dehydrated organic waste is an inclined surface that is inclined with respect to one direction in the horizontal plane, Discharge means for discharging the water leached from dehydrated organic waste to the outside is provided at the lower end or below the inclined surface, so that organic waste with a chlorine concentration of 3000 ppm or less and a low water content can be easily operated. Can be produced.

The best mode of the water content reduction method for dehydrated organic waste, the method for converting low water content organic waste into fuel, the biomass fuel, and the moisture content reduction equipment for dehydrated organic waste according to the present invention 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.

[First Embodiment]
FIG. 1 is a cross-sectional view showing a treatment facility equipped with a dehydration organic waste water content reduction facility according to a first embodiment of the present invention, in which 11 is a dehydrator, and 12 is a take-out side of the dehydrator 11. Is a moisture content reduction facility installed in

  The dehydrator 11 dehydrates an organic waste slurry containing organic waste containing either or both of livestock excrement and food waste and water, and solid-liquid separates into a solid dehydrated cake C and moisture. Various dehydrators such as a filter, a pressure filter, a centrifugal dehydrator, and a screw press can be used, and a screw press capable of solid-liquid separation in a short time is particularly preferable.

The moisture content reduction facility 12 is a facility for leaching and removing moisture contained in the solid dehydrated cake C obtained by dehydration treatment by the dehydrator 11, and a substantially funnel-like hopper that stores the dehydrated cake C. Part (housing part) 13, a mesh (net member) 14 that is detachably provided in the opening at the lower end of the hopper part 13 and leaches moisture from the dehydrated cake C, and a drainage groove 15 that drains the water that has passed through the mesh 14. It is comprised by.
The mesh 14 is made of, for example, stainless steel with a net formed in a circular or rectangular frame, and the mesh opening may be an opening that allows the moisture contained in the dewatered cake C to be leached. 10 μm or less is preferable, and 5 μm or less is more preferable.
Instead of the mesh 14, a plate (plate member) in which a plurality of holes are formed may be used.

Next, a method for reducing the moisture content of the solid dehydrated cake C using the moisture content reducing equipment 12 will be described.
Here, organic waste slurry refers to livestock excreta including livestock excrement such as chicken dung, cow dung, and pig dung, food waste such as unsold box lunches and various leftovers discarded at department stores, supermarkets, convenience stores, restaurants, etc. It is a slurry containing organic waste containing substances and water, and the water content of this slurry is 60% by mass or more, preferably 70% by mass or more.
The above-mentioned livestock excrement and food waste may be one kind of livestock excrement, or one kind of food waste, or two kinds from the whole of livestock excrement and food waste, depending on the use and necessity. The above may be selected and mixed.

First, the organic waste slurry is dehydrated using the dehydrator 11 to obtain a solid dehydrated cake C having a chlorine concentration of 3000 ppm or less and a water content of 80 mass% or less, preferably 85 mass% or less.
The drainage discharged from the dehydrator 11 is subjected to a predetermined drainage treatment by a drainage treatment facility (not shown) and then discharged to an external drainage channel or the like.

  Next, the dehydrated cake C is put into the hopper 13 of the moisture content reduction facility 12 and left to stand for a predetermined time, for example, 1 to 24 hours. During this standing, the moisture contained in the dewatered cake C moves downward due to its own weight and leaches out from the mesh 14. Moisture that has passed through the mesh 14 is discharged by the drainage groove 15, and then subjected to predetermined drainage treatment by a drainage treatment facility (not shown), and then discharged to an external drainage channel or the like.

In this moisture content reducing method, the dehydrated cake C is put into the hopper 13 of the moisture content reducing equipment 12 and allowed to stand, so that moisture contained in the dehydrated cake C is leached from the mesh 14 and discharged. The cake C can be further reduced in water content.
Further, when the moisture contained in the dewatered cake C is leached from the mesh 14 and discharged, chlorine and / or chlorine compounds contained in the dehydrated cake C are also discharged at the same time, so the chlorine concentration is extremely low and the moisture content is low. The dehydrated cake can be easily obtained.
As described above, a low water content cake (low water content organic waste) C ′ having a chlorine concentration of 3000 ppm or less and a water content of 80% by mass or less can be easily obtained with simple equipment.

Next, a method for converting this low water content cake into fuel will be described.
FIG. 2 is a schematic diagram showing a fueling facility used in the fueling method of the present embodiment, in which 21 is a drying facility, 22 is a dryer, and 23 is a pulverizer.

In order to dry the low water content cake (low water content organic waste) C ′, the drying facility 21 is solar heat according to the type and amount of livestock excrement and food waste contained in the low water content cake C ′. Single or solar drying with solar heat and natural wind, wind drying using natural wind or exhaust from other facilities, fermentation drying with fermentation heat accompanying organic waste fermentation, or two kinds It is a facility that can select the above, fermentation equipment such as vertical stirring fermentation equipment that performs fermentation drying of organic waste, horizontal open fermentation equipment, solar heat, natural wind, exhaust from other equipment, etc. And a house that performs sun drying or wind drying of low moisture content cakes.
In addition, when the kind and amount of livestock excrement and food waste contained in organic waste are limited, this drying equipment 21 is only used in either fermentation equipment or house depending on the usage. It may be configured.

The dryer 22 is a facility used to adjust the moisture content of the dried cake that has been sun-dried by the drying facility 21 or to further dry the cake. In particular, the dryer 22 can be used depending on the application. A dryer with a built-in heater is preferable in terms of ease of use.
The pulverizer 23 is an equipment for pulverizing or crushing a solid dry cake (dried organic waste) taken out from the drying equipment 21 (or the dryer 22) to form particles having a diameter of 10 mm or less. An automatic mortar A stamper, a kneader, a roll mill or the like is preferably used.

The drying or heat drying of the low moisture content cake C ′ is performed by using the drying equipment 21 in combination of one or more of sun drying, wind drying, and fermentation drying.
For example, the low moisture content cake C ′ is carried into the drying facility 21, sun drying using natural energy such as solar heat, wind drying using natural energy such as wind power or exhaust from other facilities, Drying of the above low water content cake C ′ by combining one or more of fermentation drying using fermentation heat generated from fermentation equipment such as vertical stirring fermentation equipment and horizontal open fermentation equipment To obtain a dry organic waste having a chlorine concentration of 3000 ppm or less and a water content of 35% by mass or less.
In addition, if this low moisture content cake C 'is fermented using fermentation equipment, and simultaneously drying using this fermentation heat, an efficient drying process can be performed. In this fermentation facility, since the odor and moisture are removed by introducing air containing odor and moisture generated by fermentation into the water tank, there is no possibility that odor or the like leaks to the outside.

The dry organic waste thus obtained has a chlorine concentration of 3000 ppm or less, a moisture content of 35 mass% or less, and a high calorific value, so that it can be used as various industrial fuels. It is.
In many cases, the dried organic waste has a relatively large shape such as a spherical shape, a lump shape, or a plate shape when it is simply dried. Depending on the application, the shape may remain as it is. However, when used in a cement firing facility, etc., particles are classified into particles having a diameter of 10 mm or less by performing any one or more of classification, pulverization, and pulverization using a pulverizer 23. It is good to make it.

By putting this dry organic waste into the kiln bottom of a cement kiln of a cement firing facility, it can be effectively used as a cement firing fuel.
Further, when it is desired to further reduce the moisture content of the dry organic waste, a dry organic waste having a very low moisture content is obtained by performing a drying process at a predetermined temperature for a predetermined time using the dryer 22. be able to.

"Biomass fuel"
The biomass fuel of the present embodiment is a biomass fuel having a low water content and a low chlorine concentration obtained by drying or heat-drying the low water content cake C ′. The chlorine concentration is preferably 3000 ppm or less, more preferably 2000 ppm or less, and still more preferably 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.

In this biomass fuel, since the chlorine concentration is 3000 ppm or less and the moisture content is 35 mass% or less, the thermal energy generated during combustion may be lost to the latent heat of vaporization of the water contained in the low moisture content organic waste. It becomes possible to make effective use of energy as fuel.
In addition, the chlorine concentration is low, so there is no risk of problems such as corrosion or blockage of piping, etc. even in combustion facilities, etc., and when it is put into cement firing facilities, it may adversely affect cement operation and quality. There is no.

As described above, according to the water content reduction method of the present embodiment, a low water content cake having a chlorine concentration of 3000 ppm or less and a water content of 80% by mass or less can be easily obtained. Therefore, this low moisture content cake can be effectively used as a biomass fuel having a low moisture content and a low chlorine concentration.
In addition, since the chlorine concentration is extremely low, there is no risk of problems such as corrosion or blockage of piping in combustion facilities, etc. Even when this low water content cake is used as fuel for cement firing facilities, There is no risk of adverse effects on operations and quality.

According to the fueling method of the present embodiment, a biomass fuel composed of organic waste having a chlorine concentration of 3000 ppm or less, a moisture content of 35% by mass or less, a high calorific value, and high combustion efficiency can be easily and inexpensively. Can get to.
Moreover, even if this biomass fuel is put into a cement firing facility, there is no possibility that the combustion efficiency is lowered, and there is no possibility that the operation and quality of the cement will be adversely affected.

  According to the water content reduction facility of the present embodiment, a low water content cake having a chlorine concentration of 3000 ppm or less and a water content of 80% by mass or less can be easily obtained with simple equipment.

[Second Embodiment]
FIG. 3 is a schematic diagram showing a treatment facility equipped with a dehydration organic waste water content reduction facility according to the second embodiment of the present invention, and the moisture content reduction facility according to the present embodiment is the water content of the first embodiment. The difference from the rate reduction facility is that, in the moisture content reduction facility of the first embodiment, the moisture content reduction facility 12 is constituted by the hopper part 13, the mesh 14 and the drainage groove 15, whereas the moisture content of the present embodiment. In the reduction facility 31, a mesh (net member) 32 for allowing the solid dehydrated cake C to stand and leaching moisture is inclined, and the surface of the mesh 32 is inclined outward and downward from the vicinity of the dehydrator 11 (in a horizontal plane). A storage case 33 made of stainless steel that is detachably fixed using a fixture (not shown) in a state of an inclined surface 32a that is inclined with respect to one direction) and a bottom surface of the storage case 33. The moisture that has passed through the mesh 32 Constituted by a water drain grooves 34, in that the inclined surfaces 32a of angle θ of the surface of the mesh 32 with respect to the bottom surface of the storage case 33 (the horizontal plane).

  The mesh 32 is made of stainless steel in which a net 36 is stretched on a circular (or rectangular) frame 35. The angle θ between the inclined surface 32a of the mesh 32 and the bottom surface of the storage 33 is determined from the dewatered cake C. In order to leach moisture efficiently, the angle is set to 70 ° or less.

Next, a method for reducing the moisture content of the solid cake C using the moisture content reducing equipment will be described.
The dehydrated cake C is put on the mesh 32 of the moisture content reduction facility 31 and allowed to stand for a predetermined time, for example, 1 to 24 hours. During this standing, the moisture contained in the dewatered cake C moves downward due to its own weight and leaches out from the mesh 32. Moisture that has passed through the mesh 32 is discharged by the drainage groove 34, and then subjected to a predetermined drainage treatment by a drainage treatment facility (not shown), and then discharged to an external drainage channel or the like.

In this moisture content reducing method, the dehydrated cake C is put on the mesh 32 of the moisture content reducing equipment 31 and allowed to stand, so that moisture contained in the dehydrated cake C is leached from the mesh 32 and discharged. C can be further reduced in water content.
Further, when the moisture contained in the dewatered cake C is leached from the mesh 32 and discharged, chlorine and / or chlorine compounds contained in the dehydrated cake C are also discharged at the same time, so that the chlorine concentration is extremely low and the moisture content is low. The dehydrated cake can be easily obtained.

As described above, a low water content cake (low water content organic waste) C ′ having a chlorine concentration of 3000 ppm or less and a water content of 80% by mass or less can be easily obtained with simple equipment.
Since the method for converting the low moisture content cake C ′ into fuel is exactly the same as in the first embodiment, description thereof is omitted.
In this embodiment, the same effect as that of the first embodiment can be obtained.

[Third Embodiment]
FIG. 4 is a schematic diagram showing a treatment facility provided with a dehydration organic waste water content reduction facility according to the third embodiment of the present invention, and the moisture content reduction facility according to the present embodiment is the water content of the second embodiment. The difference from the rate reduction facility is that the moisture content reduction facility of the second embodiment is configured such that the surface of the mesh 32 is an inclined surface 32 a that is inclined outward and downward from the vicinity of the dehydrator 11. In the moisture content reduction facility 41 of the embodiment, a support portion 42 that supports the mesh 32 horizontally is erected on the storage case 33, and the mesh 32 is supported by the support members 43 provided in the storage case 33 and the support portion 42, respectively. Thus, the surface of the mesh 32 is a horizontal plane 32b.
Since the method for converting the low moisture content cake C ′ of this embodiment into fuel is exactly the same as in the first embodiment, description thereof is omitted.
In this embodiment, the same effect as that of the first embodiment can be obtained.

[Fourth Embodiment]
FIG. 5 is a schematic view showing a treatment facility provided with a moisture content reduction facility for dehydrated organic waste according to a fourth embodiment of the present invention. In the figure, reference numeral 51 denotes a storage 33 on the take-out side of the dehydrator 11. This is a moisture content reduction facility provided near the end.

This moisture content reduction equipment 51 is provided at the end of a storage 52 made of stainless steel, hard plastic or the like for storing the dewatered cake C, and is any of a rotating sieve (trommel), a swinging sieve, and a rotating sieve. It is comprised by 1 type, or 2 or more types.
The mesh of these rotary sieves (trommels), swinging sieves, and rotary sieves may be an opening that allows the moisture contained in the dewatered cake C to be leached, and is preferably 10 μm or less, preferably 5 μm or less. Is more preferable.

Next, a method for reducing the moisture content of the solid cake C using the moisture content reducing equipment 51 will be described.
After the solid dehydrated cake C discharged from the dehydrator 11 is temporarily stored in the storage 33, a predetermined amount of the dehydrated cake C is put into the rotary sieve of the moisture content reduction facility 51. In this rotary sieve, the moisture in the dewatered cake C is sieved by rotating the sieve surface about an axis inclined about 5 ° from the horizontal plane, and this moisture is leached outward from the sieve surface. Moisture that has passed through the sieve surface is discharged outward by a drainage groove (not shown), and then subjected to a predetermined drainage treatment by a drainage treatment facility (not shown) and then discharged to an external drainage channel or the like. The

As described above, a low moisture content cake having a chlorine concentration of 3000 ppm or less and a moisture content of 80% by mass or less can be easily obtained with simple equipment.
Further, when the moisture contained in the dehydrated cake C is leached from the sieve surface and discharged, chlorine and / or chlorine compounds contained in the dehydrated cake C are also discharged at the same time, so that the chlorine concentration is extremely low and the moisture content is low. The dehydrated cake C ′ can be easily obtained.
Since the method for converting the low moisture content cake C ′ of this embodiment into fuel is exactly the same as in the first embodiment, description thereof is omitted.
In this embodiment, the same effect as that of the first embodiment can be obtained.

[Fifth Embodiment]
FIG. 6 is a schematic view showing a treatment facility equipped with a dehydration organic waste water content reduction facility according to a fifth embodiment of the present invention, in which 61 is a water content provided on the take-out side of the dehydrator 11. Rate reduction equipment.

The moisture content reduction facility 61 is a facility for leaching and removing moisture contained in the solid dewatered cake C obtained by dewatering with the dehydrator 11, and the bottom surface is inclined downward from the dehydrator 11 side. Drain the moisture leached from the dewatering cake C on the inclined surface 62a and the storage (storage unit) 62 that stores the dehydrated cake C that is inclined (inclined with respect to one direction in the horizontal plane). And a drainage groove 63 to be formed.
The angle θ of the inclined surface 62a with the horizontal plane is set to a range of 10 ° to 70 ° in order to efficiently leach moisture from the dehydrated cake C.

Next, a method for reducing the moisture content of the solid cake C using the moisture content reducing equipment 61 will be described.
The dehydrated cake C is put on the inclined surface 62a of the storage 62 of the moisture content reduction facility 61 and left to stand for a predetermined time, for example, 1 to 24 hours. During this standing, the moisture contained in the dewatered cake C moves downward along the inclined surface 62a due to its own weight and leaches out. The moisture is discharged through the drainage groove 63, and after being subjected to a predetermined drainage treatment by a drainage treatment facility (not shown), it is discharged to an external drainage channel or the like.

As described above, a low water content cake (low water content organic waste) C ′ having a chlorine concentration of 3000 ppm or less and a water content of 80% by mass or less can be easily obtained with simple equipment.
Since the method for converting the low moisture content cake C ′ of this embodiment into fuel is exactly the same as in the first embodiment, description thereof is omitted.
In this embodiment, the same effect as that of the first embodiment can be obtained.

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

Example 1
As the dehydrated cake, a swine dung dehydrated cake having a water content of 90% by mass and a chlorine concentration of 2500 ppm was used.
100 kg of this swine dung dehydrated cake is dropped and deposited on the inclined surface 62a of the moisture content reducing equipment 61 shown in FIG. 6, and the water leached from the swine dung dehydrated cake is discharged from the drainage ditch 63. 33 kg of pig feces dehydrated cake having a concentration of 650 ppm was obtained.

  Next, this dehydrated swine cake was carried into the drying facility 21 and sun-dried using solar heat and wind power to obtain 13 kg of dry swine manure having a water content of 25 mass% and a chlorine concentration of 650 ppm. The amount of water dehydrated from the swine dehydrated cake by sun drying was 20 kg.

(Comparative Example 1)
As a dehydrated cake, a pig dung dehydrated cake with a water content of 90% by mass and a chlorine concentration of 2500 ppm was used, and 100 kg of this pig dung dehydrated cake was put into the dryer 22 and dried by heating. A moisture content of 25% by mass and a chlorine concentration of 2500 ppm was obtained. 13 kg of dry pork dung was obtained. The amount of dehydration from the swine dewatered cake by heat drying was 87 kg.

  As described above, in Example 1, the amount of dewatered from the swine dehydrated cake was reduced by 67 kg as compared with Comparative Example 1, and the amount of heat required for heat drying could be reduced by 36200 kcal.

(Example 2)
As the dehydrated cake, a swine dung dehydrated cake having a water content of 85 mass% and a chlorine concentration of 1500 ppm was used.
100 kg of this pig dung dehydrated cake was put into a trommel of the moisture content reduction equipment 51 shown in FIG. 5 and rotated and dehydrated to obtain 43 kg of pig dung dehydrated cake having a moisture content of 65 mass% and a chlorine concentration of 490 ppm.

  Next, the dehydrated pig swine cake was carried into the drying facility 21 and was sun-dried using solar heat and wind power to obtain 20 kg of dry swine dung having a water content of 25% by mass and a chlorine concentration of 490 ppm. The amount of water dehydrated from the pig dung dehydrated cake by sun drying was 23 kg.

(Comparative Example 2)
As a dehydrated cake, a pig dung dehydrated cake having a water content of 85% by mass and a chlorine concentration of 1500 ppm was used, and 100 kg of this pig dung dehydrated cake was put into the dryer 22 and dried by heating, and a moisture content of 25% by mass and a chlorine concentration of 1500 ppm was obtained. 20 kg of dry pig feces was obtained. The amount of water dehydrated from the swine dehydrated cake by heat drying was 80 kg.

  As described above, in Example 2, the amount of dewatered from the swine dewatered cake was reduced by 57 kg as compared with Comparative Example 2, and the amount of heat required for heat drying could be reduced by 30800 kcal.

(Example 3)
As the dehydrated cake, a cow dung dehydrated cake having a water content of 85 mass% and a chlorine concentration of 3000 ppm was used.
100 kg of this cow dung dehydrated cake is dropped and deposited on the mesh 32 of the moisture content reduction facility 31 shown in FIG. 3, and the water leached from the cow dung dehydrated cake is discharged from the drainage ditch 34, with a moisture content of 75 mass% and a chlorine concentration of 1590 ppm. 60 kg of cow dung dehydrated cake was obtained.

  Subsequently, this cow dung dehydrated cake was carried into the drying facility 21 and was subjected to sun drying using solar heat and wind power to obtain 20 kg of dried cow dung having a water content of 25 mass% and a chlorine concentration of 1590 ppm. The amount of water dehydrated from cow dung dehydrated cake by sun drying was 40 kg.

(Comparative Example 3)
As a dehydrated cake, a cow dung dehydrated cake with a water content of 85% by mass and a chlorine concentration of 3000 ppm was used, and 100 kg of this cow dung dehydrated cake was put into the dryer 22 and dried by heating. A dried cow dung with a moisture content of 25% by mass and a chlorine concentration of 3000 ppm was used. 20 kg was obtained. The amount of water dehydrated from the cow dung dehydrated cake by heat drying was 80 kg.
As described above, in Example 3, the amount of dehydration from the cow dung dehydrated cake was reduced by 40 kg compared to Comparative Example 3, and the amount of heat required for heat drying could be reduced by 21,600 kcal.

It is sectional drawing which shows the processing equipment provided with the moisture content reduction facility of the 1st Embodiment of this invention. It is a schematic diagram which shows the fueling installation used for the fueling method of the 1st Embodiment of this invention. It is sectional drawing which shows the processing equipment provided with the moisture content reduction facility of the 2nd Embodiment of this invention. It is sectional drawing which shows the processing equipment provided with the moisture content reduction facility of the 3rd Embodiment of this invention. It is sectional drawing which shows the processing equipment provided with the moisture content reduction facility of the 4th Embodiment of this invention. It is sectional drawing which shows the processing equipment provided with the moisture content reduction facility of the 5th Embodiment of this invention. It is sectional drawing which shows the processing facility provided with the conventional moisture content reduction facility.

Explanation of symbols

DESCRIPTION OF SYMBOLS 11 Dehydrator 12 Water content reduction equipment 13 Hopper part 14 Mesh 15 Drainage groove 21 Drying equipment 22 Dryer 23 Crusher 31 Water content reduction equipment 32 Mesh 32a Inclined surface 32b Horizontal surface 33 Storage 34 Drainage groove 41 Water content reduction equipment 42 Support Part 43 Support member 51 Water content reduction equipment 52 Storage 61 Water content reduction equipment 62 Storage 62a Inclined surface 63 Drain groove C Dehydrated cake C 'Low water content dehydrated cake

Claims (10)

Reduced moisture content of dehydrated organic waste with a water content of 80% by mass or less obtained by dehydrating organic waste slurries containing organic waste containing livestock excrement and water, and low water content with a chlorine concentration of 3000 ppm or less The rate of organic waste ,
The dehydrated organic waste, by leaving introduced into the water leach means to leach water from water-containing material, the drained leached moisture contained in the dewatering organic waste, chlorine concentration or lower 3000ppm A method for reducing the water content of dehydrated organic waste, characterized in that the water content is organic waste. Reduced moisture content of dehydrated organic waste with a water content of 80% by mass or less obtained by dehydrating organic waste slurries containing organic waste containing livestock excrement and water, and low water content with a chlorine concentration of 3000 ppm or less The rate of organic waste ,
The dehydrated organic waste is introduced onto an inclined surface inclined with respect to one direction in a horizontal plane for leaching moisture from the water-containing substance, and the moisture contained in the dehydrated organic waste is leached to A method for reducing the moisture content of dehydrated organic waste, characterized in that the waste water is drained from the lower end side to obtain a low moisture content organic waste having a chlorine concentration of 3000 ppm or less . A method for fuelizing low moisture content organic waste obtained by the method for reducing moisture content of dehydrated organic waste according to claim 1 or 2 ,
A method for converting a low water content organic waste into a fuel, which comprises drying or heat drying the low water content organic waste to obtain a dry organic waste having a chlorine concentration of 3000 ppm or less and a water content of 35% by mass or less. The heat source in the heat drying is one of solar heat, fermentation heat generated in the fermentation process of the organic waste, or both, and fuelization of low-content organic waste according to claim 3 Method. 5. The low water content organic waste according to claim 3, wherein one or more of classification, pulverization, and pulverization is performed after drying or heat drying the low water content organic waste. Fueling method. A biomass fuel obtained by drying or heat drying a low water content organic waste obtained by the method for reducing the water content of dehydrated organic waste according to claim 1 or 2 ,
A biomass fuel having a chlorine concentration of 3000 ppm or less and a water content of 35 mass% or less. Reduced moisture content of dehydrated organic waste with a water content of 80% by mass or less obtained by dehydrating organic waste slurries containing organic waste containing livestock excrement and water, and low water content with a chlorine concentration of 3000 ppm or less Equipment that is organic waste ,
A water leaching means for leaching moisture from the dehydrated organic waste is provided in a storage portion for storing the dehydrated organic waste, and the moisture leached from the dehydrated organic waste is discharged to the outside below or below the water leaching means. Provided with a discharging means,
The dehydrated organic waste is introduced into the water leaching means and allowed to stand, and the water contained in the dehydrated organic waste is leached by the water leaching means and drained by the discharge means, whereby the dehydrated organic waste is discharged. Is a low water content organic waste having a chlorine concentration of 3000 ppm or less . 8. The dehydration according to claim 7 , wherein the water leaching means includes at least one of a mesh member, a plate member having a plurality of holes, a rotary sieve, a swing sieve, and a rotary sieve. Equipment for reducing the moisture content of organic waste. The dehydrating organic waste water content reduction facility according to claim 8, wherein the net member or the plate member is inclined with respect to one direction in a horizontal plane. Reduced moisture content of dehydrated organic waste with a water content of 80% by mass or less obtained by dehydrating organic waste slurries containing organic waste containing livestock excrement and water, and low water content with a chlorine concentration of 3000 ppm or less Equipment that is organic waste ,
At least a part of the bottom surface of the storage unit that stores the dehydrated organic waste is an inclined surface that is inclined with respect to one direction in a horizontal plane,
A discharge means for discharging moisture leached from the dehydrated organic waste to the outside is provided at the lower end or below the inclined surface,
The dehydrated organic waste is left on the inclined surface, the moisture contained in the dehydrated organic waste is leached, introduced into the discharge means by the inclined surface, and drained, thereby draining the dehydrated organic waste. A facility for reducing the moisture content of dehydrated organic waste, characterized by having a low moisture content organic waste having a chlorine concentration of 3000 ppm or less .

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