JP2006175356A - Processing method of chicken droppings and treatment apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a processing method of chicken droppings which is capable of efficiently fuelizing chicken droppings with high water content and reduces the effects imparted to cement calcination equipment by effectively utilizing cement calcination equipment and to provide a treatment apparatus therefor. <P>SOLUTION: The processing method of chicken droppings comprises introducing the chicken droppings by a supply line 32 and an exhaust gas extracted from clinker cooler 8 via an exhaust gas introduction line 36 into a dry crusher 33 to dry and crush the chicken droppings, then collecting the dried and crushed powder chicken drippings by a separation collecting apparatus 34 and separating the exhaust gas, burning the powder chicken droppings in a rotary kiln 7 or a calcination furnace 9 and returning the separated exhaust gas to the clinker cooler 8, and using the residue generated by burning the powder chicken droppings as a part of clay which is a raw material of cement clinker. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method and apparatus for treating chicken manure, and more specifically, when using chicken manure with a high water content as fuel, the cement firing facility can be effectively used, and the influence on the cement firing facility is reduced. The present invention relates to a method and apparatus for treating chicken dung.

Conventionally, in rotary kilns for cement firing facilities, combustible waste such as waste tires and plastics is used among organic wastes as a substitute for part of the fuel.
In addition, recently, a method of incineration is also performed by directly putting organic waste containing a large amount of combustible water directly into a rotary kiln.
For example, there is a method in which organic water-containing sludge is introduced directly into a kiln bottom part of a rotary kiln or a calcining furnace and incinerated without drying and without pretreatment with additives ( For example, see Patent Document 1).
In general, most of the organic water-containing sludge is occupied by moisture and organic matter, so that the amount of ash produced as a residue by incineration is very small. Therefore, even when organic water-containing sludge is directly fed into the rotary kiln, it does not affect the components of the cement clinker and can be incinerated in the rotary kiln.

  By the way, in the method of directly feeding organic water-containing sludge into the rotary kiln, as the moisture in the waste evaporates, the raw material temperature decreases at the kiln bottom of the rotary kiln, and is heated and decarboxylated in a suspension preheater or calciner. The cement clinker firing capacity of the cement firing equipment will be extremely reduced due to the decrease in sensible heat of the raw material, or the temperature of the zone (kiln firing zone) where the cement raw material is sintered into a clinker shape, etc. In addition, since the calorific value for calcining and the amount of electric power used per unit clinker are high, there is a possibility that economical operation becomes impossible.

On the other hand, instead of organic water-containing sludge, attempts are being made to effectively use, as fuel, waste or the like that has a high water content but contains a large amount of organic components.
An example of organic waste having a high calorific value is chicken dung, and attempts have been made to use organic components of chicken dung effectively as fuel.
For example, livestock manure such as chicken manure is soaked in oil at a constant temperature under reduced pressure, and then oiled so that a solid material can be used as an auxiliary combustion material (for example, a patent) Reference 2).
Also, dehydration or drying of livestock excrement such as chicken excrement so that the water content is 50% or less, mixed with pulverized coal whose particle size is adjusted, compressed, extruded and sheared, the water content is 20% or less. A pellet-shaped solid fuel has also been proposed (see, for example, Patent Document 3).
These fuels can be used as auxiliary fuels in cement burning facilities.
JP 2002-52397 A JP-A-10-121074 JP 60-106889 A

However, since chicken manure usually contains about 40 to 70% of water, a large amount of heat is required to heat, dehydrate or dry with hot oil, and after heating / dehydration or drying treatment Since exhaust gas contains odor components and volatilized organic components, an exhaust gas treatment process is needed to remove these components by performing a heat treatment that raises the temperature again to burn and decompose odor components and volatile organic components. There was a problem of becoming.
The amount of heat used for this treatment may be greater than the amount of heat that is derived from the organic matter of chicken manure, and cannot be an effective means for fueling chicken manure. In addition, the apparatus for converting chicken dung into fuel also has problems such as a complicated configuration of the apparatus because many processes are required as described above.
Thus, in actual combustion furnaces and the like, chicken manure is not currently used as fuel.

  The present invention has been made in order to solve the above-mentioned problems, and by effectively using a cement burning facility, chicken dung having a high water content can be efficiently used as fuel, and cement can be used. It aims at providing the processing method and processing apparatus of the chicken manure which can make the influence which it has on a baking equipment small.

  As a result of intensive research to solve the above problems, the present inventors have supplied chicken manure to an area where the internal temperature of the cement firing facility is 800 ° C. or higher when using the chicken manure as a fuel for the cement firing facility. If the residue after combustion of chicken dung produced in this cement firing facility is used as a raw material for cement clinker, the reduction in the firing efficiency of cement clinker and the effect on cement quality will be minimized. In addition, the present inventors have found that the residue after combustion of chicken manure produced in this cement firing facility can be effectively used as a raw material for cement clinker, and the present invention has been completed.

  That is, the method for treating chicken droppings according to the present invention is a method for treating chicken droppings as a fuel for a cement burning facility, wherein the moisture content of the chicken droppings is adjusted to 40% or less, and the internal temperature of the cement burning facility is adjusted. While supplying and burning to the area | region more than 800 degreeC, the residue after the combustion of the said chicken manure produced in this cement baking equipment is used as a cement clinker raw material.

  In this chicken manure treatment method, the use of chicken manure adjusted to a moisture content of 40% or less as the fuel for the cement burning facility reduces the impact on the operation of the cement burning facility due to the evaporation of moisture when burning the chicken manure. The amount of heat generated when the organic component of chicken dung is burned is effectively used.

The chicken manure is preferably dried or dried and pulverized using the exhaust gas extracted from the cement baking equipment, and the water content is preferably 40% or less.
In this method, when reducing the water content of chicken manure to produce fuel, the chicken manure with a high water content is dried or dried and pulverized using the exhaust gas extracted from the cement firing facility, and the water content is reduced to 40% or less. Therefore, no special heat source is required for drying.
Moreover, by using dried chicken manure as a fuel for cement burning equipment, the amount of heat possessed by chicken manure can be used effectively, and there is no effect on the operation of cement burning equipment, and the use of main fuel can be reduced. It becomes possible.

It is preferable that the exhaust gas used in the drying or drying / pulverization is returned to the cement firing facility.
This method requires equipment and a heat source to treat the exhaust gas used for drying, drying, and crushing chicken manure by treating the exhaust gas used for drying, drying, and crushing chicken dung with the cement baking equipment. In this way, it becomes possible to make chicken manure into fuel at a low cost.

The exhaust gas is a high-temperature gas extracted from the clinker cooler of the cement firing equipment, and the high-temperature gas is introduced into the clinker cooler as cooling air for the clinker after the drying or drying / pulverization, and after the cooling It is preferable to introduce air into the calcining furnace of the cement firing facility as combustion air.
It is preferable that 60% by volume or more of the cooled air is introduced into the calcining furnace of the cement baking equipment as combustion air.

  In this method, a high-temperature gas extracted from a clinker cooler is used as a heat source for drying, drying, and crushing chicken manure, and this high-temperature gas is introduced into the clinker cooler as air for cooling the clinker after drying, drying, and crushing. When drying or drying / pulverizing chicken manure, it is possible to eliminate the influence of moisture contained in the high-temperature gas after drying on the temperature reduction of the firing zone of the cement firing facility. Thereby, even when a large amount of chicken manure is used as a fuel after drying or drying / pulverization, the quality of the cement clinker does not deteriorate.

  Using the solid fuel drying and grinding device provided in the cement firing facility, the chicken manure is dried and ground together with the solid fuel, and the resulting dried and ground product is either a calcining furnace of the cement firing facility or a rotary kiln. Or it is preferable to supply to both and to burn.

  In this method, it is possible to use a solid fuel drying and grinding device provided in a cement baking facility for drying and grinding chicken poultry. Thereby, it becomes easy to make chicken manure into fuel, and it becomes possible to reduce the amount of solid fuel used.

  The apparatus for treating poultry manure of the present invention is an apparatus for treating poultry manure as a fuel for a cement burning facility, and drying or drying / pulverizing the chicken manure using an exhaust gas extracted from the cement burning facility. Means and chicken dung supply means for supplying the dried or dried and crushed chicken dung as fuel to the cement burning facility.

  With this chicken manure processing device, the above configuration makes it possible to minimize the decrease in cement clinker firing efficiency and the impact on cement quality when chicken manure is used as fuel for cement firing equipment. In addition, it is possible to effectively use the residue after combustion of the chicken manure as a cement clinker raw material.

According to the method for treating chicken droppings of the present invention, the moisture content of the chicken droppings is adjusted to 40% or less, and the chicken droppings are supplied to the region where the internal temperature of the cement baking equipment is 800 ° C. or more and burned. It is possible to reduce the influence on the operation of the cement firing facility due to the evaporation of moisture at the time. In addition, by using the exhaust gas from the cement firing facility, there is no need for a special heat source for drying, drying, or crushing chicken dung, or for exhaust gas treatment after drying or after drying / crushing. The amount of main fuel used in the cement firing facility can be reduced, and the influence on the operation of the cement firing facility can be reduced.
In addition, since the residue after combustion of chicken dung produced in this cement burning facility is used as a raw material for cement clinker, it is not necessary to treat the residue after burning chicken dung, and the impact on the operation of the cement burning facility is extremely small. can do.

  According to the apparatus for treating chicken droppings of the present invention, the drying or drying / pulverizing means for drying or drying / pulverizing the chicken droppings using the exhaust gas extracted from the cement baking facility, and the dried or dried / ground chicken poultry as the cement The chicken manure supply means for supplying fuel to the firing facility is provided, so when using chicken manure as the fuel for the cement firing facility, the decrease in cement clinker firing efficiency and the impact on cement quality can be minimized. And the residue after combustion of this chicken dung can be used effectively as a cement clinker raw material.

An embodiment of a processing method and processing apparatus for chicken dung of 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.

FIG. 1 is a schematic diagram showing a cement production facility according to an embodiment of the present invention, which is an example of a cement production facility in which chicken manure is dried and ground and used as fuel in a calcining furnace of the cement firing facility.
In the figure, 1 is a raw material mill for drying and pulverizing cement raw material, 2 is a cyclone for separating cement raw material powder, 3 is a cement raw material storage, 7 is a rotary kiln, 8 is a clinker cooler, 9 is a calcining furnace, 10 is a multi-stage Suspension preheaters comprising cyclones 10a to 10d, 11 a secondary duct of the calcining furnace 9, 12 an electric dust collector, 13 an exhaust chimney, and 14 a burner.

The rotary kiln 7, the clinker cooler 8, the calcining furnace 9, and the suspension preheater 10 constitute a cement firing facility.
Further, 21 is a cooler exhaust line, 22 is a cement raw material supply line, 24 is a cement raw material powder supply line, and 25 is a cement clinker conveying line.

  Reference numeral 31 denotes a powdered fuel processing apparatus for chicken manure, which is dried and pulverized using a supply line 32 for supplying the chicken manure, and the high temperature exhaust gas discharged from the clinker cooler 8 and extracted from the chicken manure supplied from the supply line 32. And a dry pulverizer (drying / pulverizing means) 33 for reducing the moisture content to 40% or less, and a separation / collecting device for separating and collecting chicken manure dried and pulverized to a moisture content of 40% or less from the exhaust gas ( Separating and collecting means) 34, powdered chicken manure supply line (chicken manure supplying means) 35 for supplying powdered chicken manure separated from the exhaust gas and dried and pulverized as powdered fuel near the bottom of the calciner 9, and discharged from the clinker cooler 8 An exhaust gas introduction line 36 for introducing the extracted high-temperature exhaust gas to the drying pulverizer 33, an exhaust gas supply line 37 for returning the exhaust gas separated by the separation / collecting device 34 to the clinker cooler 8, Processing of poultry manure in al the device is constituted by a temperature control device for controlling the conveyance amount and the like with (not shown).

This poultry manure powdered fuel treatment apparatus 31 is suitable for the fuel treatment of chicken manure having a high water content with a water content of 40% or more.
Since chicken manure usually contains a lot of lumps of 20 mm or less, when it is made into fuel only by drying, when it is ejected from the kiln burner as fuel for cement kiln, the lumpy chicken shit is dropped on the cement clinker. There is a risk of partial combustion and transport to the clinker cooler together with the cement clinker in a state where combustion is not completed in the cement kiln. Therefore, it is preferable to pulverize chicken manure at the same time as drying the chicken manure. By crushing dried chicken manure, it becomes effective as a fuel for cement burning equipment.

  The dry pulverizer 33 can dry and pulverize the high water content chicken manure containing a large amount of the above-mentioned lump using the high-temperature exhaust gas of about 250 to 500 ° C. discharged from the clinker cooler 8 and extracted. For example, a vertical mill is preferably used. This vertical mill can be dried and pulverized at the same time, and the temperature of the dry pulverized material can be normally maintained at about 70 to 80 ° C. Powdered chicken manure can be easily dried by airflow drying. In addition, since the energy utilization efficiency is high, dry pulverization can be performed with a small amount of gas.

As the separation / collection device 34, a cyclone dust collector, a bag filter, or the like is preferably used.
The dried and pulverized chicken manure and exhaust gas introduced into the separation / collection device 34 contain odor components generated from chicken manure having a high water content and partially evaporated organic components. Therefore, in order to remove these odor components and organic components, it is necessary to reheat them to a temperature of 800 ° C. or higher to decompose these odor components and organic components.

  In particular, when a bag filter is used, it is possible to separate it from exhaust gas by completely collecting dry pulverized chicken poultry manure. Moreover, although the above-mentioned odor component and organic component are contained in the exhaust gas after collecting the dried powdered chicken manure, it does not contain organic dust. Therefore, by reusing the exhaust gas that has passed through the bag filter as combustion air for the cement firing equipment, it is possible to decompose the odor components and organic components at a high temperature in the cement firing equipment.

When reusing as combustion air, it can also be used as fuel combustion primary air for rotary kiln 7 or calcining furnace 9 or air for transporting powdered coal, and recirculates to cooling air of clinker cooler 8 or the like. Accordingly, the air can be used as high-temperature air, and can also be used as secondary air for fuel combustion in the rotary kiln 7 or the calciner 9.
In consideration of the required processing amount of the exhaust gas, it is more preferable to recirculate to the cooling air of the clinker cooler 8 and use it as secondary air.

Exhaust gas that has passed through the bag filter contains a large amount of water vapor compared to normal air and may be up to about 10%, so it is formed by a burner when used in large quantities as combustion air. The temperature of the flame may decrease.
In particular, if the rotary kiln 7 is used in a large amount as combustion air, the quality of the cement clinker may deteriorate due to a drop in the temperature of the flame in the rotary kiln 7. Therefore, it is preferable to reuse as the fuel combustion air of the calciner 9.

  When recirculating as cooling air to the clinker cooler 8, the exhaust gas is introduced into the clinker cooler 8 not from the cooling chamber (one chamber) on the most upstream side (rotary kiln 7 side) of the clinker cooler 8. It is preferable that the downstream cooling chamber be located at a position where it can be recovered as secondary air for combustion of fuel in the calcining furnace 9 of the cement firing facility.

Next, a method for fueling chicken dung using this cement production facility will be described.
As chicken droppings used here, even chicken droppings having a high moisture content with a moisture content of 40% or more can be treated effectively.
In order to convert the high water content chicken manure into fuel, first, the high water content chicken manure is supplied to the drying crusher 33 through the supply line 32 and discharged from the clinker cooler 8 through the exhaust gas introduction line 36. A high-temperature exhaust gas of about ˜500 ° C. is introduced into the dry pulverizer 33, and the chicken dung having a high water content is dried and pulverized at the same time.
Here, the supply amount of chicken manure with high water content and the supply amount of exhaust gas are optimized so as to efficiently dry and pulverize the chicken manure with high water content.
As a result, the chicken manure is pulverized and the water content is reduced to a few percent or less, resulting in powdered chicken manure.

Next, the dried and pulverized powder chicken droppings are introduced into the separation / collecting device 34 together with the exhaust gas, and the dried and pulverized powder chicken droppings are collected, and at the same time, the exhaust gas introduced together with the powder chicken droppings is separated.
Since the collected powdered chicken manure is a dried powder having a moisture content of several percent or less, a transportation means (method) such as air transportation can be easily adopted, and rotary kiln 7 or temporary It becomes possible to transport and supply to the furnace 9.
The temperature at the supply position of the rotary kiln 7 or calcining furnace 9 needs to be a temperature sufficient for burning and decomposing the powdered chicken manure, and the condition is 800 ° C. or higher.
Here, it is supplied to the burner 14 of the calciner 9 by the powdered chicken manure supply line 35, and is burned and decomposed.

  On the other hand, the separated exhaust gas is returned to the clinker cooler 8 by the exhaust gas supply line 37, and is supplied as cooling air for the cement clinker to the cooling chamber on the downstream side of the clinker cooler excluding the cooling chamber on the most upstream side for reuse. Is done. The exhaust gas after cooling is recovered as secondary air for fuel combustion.

In the calcining furnace 9, the powdered chicken manure is burned together with the main fuel such as pulverized coal ejected from the burner 14, and a combustion flame having a temperature of 900 ° C. or higher is formed.
Therefore, the supplied powdered chicken manure is effectively used as fuel, and the organic matter contained in the powdered chicken manure is completely burned and decomposed, and there is no possibility of being released to the outside as an unreacted organic matter or intermediate product.
On the other hand, the inorganic substance contained in the powdered chicken manure is introduced into the rotary kiln 7 from the calcining furnace 9 via the lowermost cyclone 10d and used as a part of the clay which is a raw material of the cement clinker.

As described above, according to the method for fuelizing chicken manure of this embodiment, the chicken manure having a high water content is dried and pulverized by the dry pulverizer 33, and then the dried and pulverized powder chicken manure is calcined. 9 is burned as a fuel and combusted as fuel, so that combustion equivalent to that of conventional solid fuel such as coal powder fuel becomes possible, moisture does not evaporate in the cement firing facility, and clinker firing in the cement firing facility. There is no impact on operations such as reduced capacity and cement quality.
In addition, since a relatively low temperature exhaust gas of 250 to 500 ° C. can be used when drying and pulverizing chicken dung having a high water content, the exhaust gas discharged from the cement firing facility can be effectively used.

In addition, the high-temperature exhaust gas discharged from the clinker cooler 8 is used effectively, and the exhaust gas after drying and pulverization is returned to the clinker cooler 8 to circulate and use it as cooling air for the cement clinker, and the exhaust gas is heated again ( Air) can be effectively used as secondary air for combustion in cement burning equipment.
Therefore, even if the exhaust gas after dry pulverization contains odor components or volatile organic substances of chicken manure, it can be completely burned and decomposed in the combustion process in the rotary kiln 7 or calcining furnace 9. .
In particular, when used as the secondary air of the calcining furnace 9, it is possible to minimize the influence of water vapor generated in the drying process of chicken manure contained in the secondary air, thus affecting the cement firing process. Without this, a stable cement clinker can be produced.

  According to the chicken manure fueling processing apparatus 31 of the present embodiment, the dry pulverizer for drying and pulverizing the high water content chicken manure supplied from the supply line 32 using the high-temperature exhaust gas discharged from the clinker cooler 8 and extracted. 33, a separation and collection device 34 for separating and collecting the dried and pulverized powdered chicken manure from the exhaust gas, and a powder for supplying the separated and dried and pulverized powdered chicken manure to the vicinity of the bottom of the calcining furnace 9 as a powder fuel A poultry manure supply line 35, an exhaust gas introduction line 36 for introducing the exhaust gas discharged from the clinker cooler 8 and extracted to the drying pulverizer 33, and an exhaust gas supply line for returning the exhaust gas separated by the separation / collecting device 34 to the clinker cooler 8 37, the high water content chicken manure can be dried and pulverized and burned effectively as a powdered fuel.

  In addition, since the separated, dried and pulverized powdered chicken manure is supplied as powdered fuel near the bottom of the calcining furnace 9, the residue of the powdered chicken manure after combustion can be effectively used as a cement clinker raw material.

  In addition, this cement firing equipment is equipped with a solid fuel drying and grinding device that dries and pulverizes conventionally used solid fuels such as coal, and the powder obtained by drying and pulverizing chicken dung with a high water content together with the solid fuel A dried product made of a mixture of chicken manure and powdered solid fuel may be supplied to one or both of the calcining furnace 9 and the rotary kiln 7 and burned.

By adopting such a configuration, it is possible to dry and pulverize chicken manure having a high water content using a conventionally used solid fuel drying and pulverizing apparatus.
Therefore, poultry manure can be easily converted into powder fuel without using a special device, and the amount of solid fuel such as coal that has been conventionally used can be reduced.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples.
Here, to the cement production facility shown in FIG. 1, chicken dung obtained from meat chickens is directly fed into the calcining furnace 9 while changing moisture, and the water content of chicken dung has an effect on the operation of the cement burning facility. The effect of organic components contained in chicken manure as a fuel was investigated.
Here, the thing which does not use chicken manure at all was defined as “conventional example”.
The chicken manure and powdered coal used here had the following properties.

(1) Chicken droppings Chicken droppings obtained from chickens for meat were used. The chicken manure was a lump with a maximum particle size of 20 mm.
Next, each analysis result and calorific value of this chicken manure are shown.
"Industrial Analysis"
The analysis was performed in accordance with Japanese Industrial Standard JIS M8812 “Coal and Coke-Industrial Analysis”. The results of the analysis are as follows.
Moisture: 26.3% Ash content: 13.5% Volatile content: 51% Fixed carbon: 8.4%

Elemental analysis
Elemental analysis was performed in accordance with Japanese Industrial Standard JIS M8813 “Coal and Coke-Elemental Analysis Method”. The results of elemental analysis are as follows.
Carbon: 44.3% Hydrogen: 5.0% Nitrogen: 4.2% Oxygen: 32.2%

"Calorific value"
Total calorific value (dry basis) and true calorific value (wet basis) in accordance with Japanese Industrial Standards JIS M8814 "Coal and cokes-Measuring method of total calorific value with bomb calorimeter and calculating method of true calorific value" Asked. The results are as follows.
Total calorific value (dry basis): 4090 Kcal / kg
(True calorific value (wet base): 2590 Kcal / kg)

(2) Powdered coal The total calorific value and the true calorific value were determined by the same method as the above chicken manure. The results are as follows.
Total calorific value: 6750 Kcal / kg
(True calorific value: 6500 Kcal / kg)

"Example 1"
The mixed powder fuel obtained by mixing the above-mentioned chicken manure into coal at a mixing rate of 25%, drying and pulverizing it in a vertical coal mill, into a cement firing facility operating at a cement clinker firing capacity of 275 t / h, It was burned by sending air pressure as fuel.
In the operation of the cement firing facility, the mixed powder fuel of the calcining furnace 9 was adjusted so that the gas temperature at the outlet of the cyclone 10d at the bottom of the cement firing facility was constant. Further, the internal temperature of the uppermost cyclone 10a was adjusted by spraying water so that the outlet temperature of the suspension preheater 10 (gas temperature at the uppermost cyclone 10a outlet) was constant.
The implementation conditions are shown in Table 1, and the operation status of the cement burning equipment is shown in Table 2, respectively.

  As a result, the amount of mixed powder fuel used in calcining furnaces has increased since the calorific value of powdered fuel due to mixing of chicken manure is reduced compared to coal-only powdered fuel. It was found that the amount of powdered coal used decreased. In addition, it has been confirmed that the amount of powdered coal can be reduced to an extent that is almost commensurate with the amount of heat of the injected chicken manure, because the cement clinker firing capacity of the cement firing facility has little effect on the operation.

"Example 2"
The above chicken manure is directly put into a calcining furnace of a cement firing facility operating at a cement clinker firing capacity of 275 t / h in a lump containing moisture of 26.3% at an input amount of 4.0 t / h. , Investigated the impact on operations.
The implementation conditions are shown in Table 1, and the operation status of the cement burning equipment is shown in Table 2, respectively.

As a result, it was found that the amount of powdered coal used was reduced by about 1.5 t / h and the cement clinker firing ability was slightly reduced.
Moreover, in the clinker calcining calorific value, it was clearly confirmed that the calorific value of the powdered coal as the main fuel was lowered.

"Example 3"
Cement burning equipment that is made by adding water to the above chicken manure to increase the water content from 26.3% to 40%, and then operating the chicken manure with the cement clinker firing capacity of 275 t / h in the form of a lump. The calcining furnace was directly charged at a charging rate of 4.0 t / h, and the influence on the operation was examined.
The implementation conditions are shown in Table 1, and the operation status of the cement burning equipment is shown in Table 2, respectively.

As a result, it was found that the amount of powdered coal used was reduced by about 1.0 t / h and the cement clinker firing ability was slightly reduced.
Moreover, in the clinker calcining calorific value, the calorific value of the powdered coal, which is the main fuel, was reduced, and the rate of reduction was about 50% of Example 1.

"Comparative example"
The above-mentioned chicken dung was hydrated to produce massive chicken dung with a high water content with water content increased from 26.3% to 60%. The chicken dung was kept in a lump and operated at a cement clinker firing capacity of 275 t / h. It was directly charged into a calcining furnace of a cement burning facility at an input rate of 4.0 t / h, and the influence on operation was examined.
The implementation conditions are shown in Table 1, and the operation status of the cement burning equipment is shown in Table 2, respectively.

As a result, it was found that the amount of powdered coal used was reduced by about 1.0 t / h and the cement clinker firing ability was greatly reduced.
In addition, the calcining calorific value of the clinker was an operation in which the calorific value of the powdered coal, which is the main fuel, hardly decreased.
As described above, in the chicken manure containing 60% moisture, the calorific value of the chicken manure is consumed for the evaporation of moisture, and there is almost no effect as a fuel, and there is an influence on the operation of the cement burning equipment such as the cement clinker burning ability. large.

  As described above, the experimental results of Examples 1 to 3, the comparative example, and the conventional example confirm the influence of the stored heat amount and moisture of the chicken manure on the cement firing facility, and the chicken manure functions sufficiently as a fuel in the cement firing facility. In order to achieve this, the water content needs to be 40% or less. When the water content exceeds 40%, the role as a fuel is reduced, and the cement clinker firing ability in the rotary kiln is greatly reduced. It turned out that it cannot fully demonstrate.

It is a schematic diagram which shows the cement manufacturing equipment of one Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Raw material mill 2 Cyclone 3 Cement raw material storage 7 Rotary kiln 8 Clinker cooler 9 Calciner 10 Suspension preheater 10a-10d Cyclone 11 Secondary duct 12 Electric dust collector 13 Exhaust chimney 14 Burner 21 Cooler exhaust line 22 Cement raw material supply line 24 Cement raw material powder Supply line 25 Cement clinker conveyance line 31 Powdered fuel processing device for chicken dung 32 Supply line for supplying chicken dung 33 Dry crusher 34 Separation and collection device 35 Powdered chicken dung supply line 36 Exhaust gas introduction line 37 Exhaust gas supply line

Claims (7)

A method for treating chicken manure as a fuel for cement burning equipment,
After adjusting the moisture content of the chicken manure to 40% or less, supplying the chicken manure to an area where the internal temperature of the cement burning facility is 800 ° C. or more and burning it, and after burning the chicken manure generated in the cement burning facility A method for treating poultry manure, comprising using the residue of as a raw material for cement clinker.   The method for treating chicken droppings according to claim 1, wherein the chicken droppings are dried or dried and pulverized using an exhaust gas extracted from the cement firing facility, and the water content is 40% or less.   The method for treating chicken dung according to claim 2, wherein the exhaust gas used in the drying or drying / pulverization is returned to the cement baking facility. The exhaust gas is a high-temperature gas extracted from a clinker cooler of the cement firing facility,
The high-temperature gas is introduced into the clinker cooler as clinker cooling air after the drying or drying / pulverization, and the cooled air is introduced into the calcining furnace of the cement firing facility as combustion air. The processing method of the chicken manure of Claim 2 or 3.   5. The method for treating chicken dung according to claim 4, wherein 60% by volume or more of the cooled air is introduced into the calcining furnace of the cement baking equipment as combustion air.   Using the solid fuel drying and grinding device provided in the cement firing facility, the chicken manure is dried and ground together with the solid fuel, and the resulting dried and ground product is either a calcining furnace of the cement firing facility or a rotary kiln. 6. The method for treating chicken dung according to any one of claims 1 to 5, wherein both are supplied and burned. An apparatus for treating chicken manure as a fuel for cement burning equipment,
Drying or drying / pulverizing means for drying or drying / pulverizing the chicken manure using the exhaust gas extracted from the cement firing facility, and chicken manure supply for supplying the dried or dried and ground chicken feces as fuel to the cement firing facility And a chicken dung processing apparatus.

Images