KR102559626B1 - An apparatus for drying organic sludge, a system for converting organic sludge into solid fuel including the same, and a method for preparing solid fuel from organic sludge - Google Patents

Abstract

The present application relates to an organic sludge drying apparatus that is environmentally friendly and can improve energy efficiency through a structural design that reuses heat medium oil. The present application also relates to a solid fuel conversion system of organic sludge capable of continuously producing a large amount of solid fuel by treating organic sludge in a short time, and a method of converting organic sludge into solid fuel.

Description

An apparatus for drying organic sludge, a system for converting organic sludge into solid fuel including the same, and a method for preparing organic sludge for solid fuel production solid fuel from organic sludge}

This application relates to a drying apparatus for organic sludge.

The present application also relates to a system for turning organic sludge into solid fuel, including a drying device for organic sludge.

This application also relates to a method for producing solid fuel from organic sludge.

Conventionally, for the treatment of organic sludge such as sewage and wastewater sludge, food sludge, and livestock wastewater sludge generated from industrial facilities, households and farms, it has been dumped at sea, landfilled, or incinerated. However, due to the London Convention and the Kyoto Convention, not only was dumping at sea eradicated, but also landfill caused environmental problems such as soil and water pollution. In addition, since direct landfilling of organic sludge is prohibited by law, after burning sewage sludge or wastewater sludge, the incineration ash must be landfilled. Therefore, a method for incinerating sludge containing a large amount of moisture is required. In addition, as a way to prepare alternative energy due to the sharp rise in international oil prices, it is necessary to study a method of recycling organic sludge, such as composting or turning it into fuel.

Until now, the domestic organic waste solid fuel conversion method is a heat treatment method using heat, and is roughly divided into hot air drying technology and carbonization technology. However, this heat treatment method is evaluated as uneconomical due to the large amount of energy required for drying the sludge, and the comparative advantage in the effectiveness of each organic waste treatment technology is lacking due to the lack of a standardized system for the process of selecting a method for each facility. Here's the hard part. In particular, the heat treatment method causes a lot of obstacles to drying due to the serious sticking phenomenon of organic waste. It is required.

Korean Patent Publication No. 2015-0106563

An object of the present application is to provide an organic sludge drying apparatus that is environmentally friendly, can improve energy efficiency, and has an improved drying cycle.

Another object of the present application is to provide a system for converting organic sludge into solid fuel with improved production efficiency of solid fuel and a method for producing solid fuel from organic sludge.

An organic sludge drying apparatus according to an embodiment of the present application includes a first dryer and a second dryer, wherein the first dryer and the second dryer each have a case with an inner space and organic sludge formed on the upper side of the case An inlet, a heating medium oil inlet formed on the upper side of the case, a heating unit for heating the inside of the case, and an outlet formed on the lower side of the case, wherein the organic dry matter and the heat medium discharged from the discharge port of the first dryer or the second dryer deoiler to separate oil; And the regenerated heat medium oil discharged from the outlet of the first dryer and separated by deoiling is injected into the heat medium oil injection hole formed on the upper side of the case of the second dryer, or discharged from the outlet of the second dryer and separated by deoiling It is characterized in that it includes a regenerated heat medium oil recovery unit for injecting the regenerated heat medium oil into a heat medium oil injection port formed on the upper side of the case of the first dryer.

As an example, the organic sludge drying apparatus includes an organic sludge storage tank for inputting organic sludge into a first dryer or a second dryer, and a first heat medium oil storage tank for injecting a first heat medium oil into a first dryer or a second dryer It is characterized in that it further comprises.

As an example, it is characterized in that the first heat medium oil and the regenerated heat medium oil are injected through the same heat medium oil injection port formed on the case upper side of the first dryer or the second dryer.

As an example, it is characterized in that the first heat medium oil and the regenerated heat medium oil are injected through different heat medium oil injection ports formed on the case upper side of the first dryer or the second dryer.

The organic sludge drying apparatus is characterized in that it includes a control unit for controlling the injection amount of the first heat medium oil and the regenerated heat medium oil injected into the first dryer or the second dryer.

As an example, the control unit controls the injected amount of the regenerated heat medium oil injected into the first dryer or the second dryer to be 80% or more compared to the injected amount of the total heat medium oil injected into the first dryer or the second dryer. to be

As an example, the control unit controls the weight difference between the weight of the total heat medium oil injected into the first dryer and the regenerated heat medium oil discharged through the outlet of the first dryer and separated by deoiling and injected into the second dryer. It is characterized by controlling the injection of the first heat medium oil into the dryer

As an example, the control unit controls the weight difference between the total weight of the heat medium oil injected into the second dryer and the weight of the regenerated heat medium oil discharged through the outlet of the second dryer and separated by deoiling and injected into the first dryer. It is characterized by controlling the injection of the first heat medium oil into the dryer

A system for turning organic sludge into solid fuel according to another embodiment of the present invention includes a drying device for the organic sludge, and the first dryer and the second dryer alternately operate continuously.

As an example, the system for converting organic sludge into solid fuel has a ratio (D1:D2) of 1: 1 to 1: 3 between organic dry matter (D1) separated by deorganization and organic waste (D2) input from the outside. It is characterized in that it further comprises a blender for blending so as to be.

As one example, the system for turning organic sludge into solid fuel is characterized in that it further includes a molding machine for shaping the organic dry matter separated by the deoiler into a solid material.

As an example, the system for converting organic sludge into solid fuel is characterized in that it includes a temperature controller for adjusting the temperature of the solid produced from the molding machine to be less than 60 ° C.

As one example, the solid fuel conversion system of the organic sludge is characterized in that it further comprises a cooler for cooling water vapor discharged from the first dryer or the second dryer.

According to another embodiment of the present invention, in the method for converting organic sludge into solid fuel produced by using the organic sludge drying apparatus, the organic sludge injected into the first dryer and the heat medium oil injected into the first dryer are subjected to normal pressure A first process including the step of mixing and drying the dried organic material and the heat medium oil under the condition, and the step of injecting the separated regenerated heat medium oil into a second dryer; And mixing and drying the organic sludge and the injected heat medium oil introduced into the second dryer under normal pressure, separating the dried organic dried material and the heat medium oil with a deoiler, and injecting the separated regenerated heat medium oil into the first dryer It is characterized in that it comprises a second process comprising the step of doing.

As an example, in the solid fuel production method of the organic sludge, it is characterized in that the first process and the second process are continuously operated by alternating.

As an example, in the solid fuel production method of the organic sludge, the injection amount of the regenerated heat medium oil injected into the first dryer or the second dryer compared to the injection amount of the total heat medium oil injected into the first dryer or the second dryer is 80% It is characterized in that it is controlled so that it becomes abnormal.

delete

delete

As an example, the solid fuel production method of the organic sludge is a ratio of 1: 1 to 1: 3 (D1: D2) of organic dry matter (D1) separated by deorganization and organic waste (D2) input from the outside It is characterized in that it further comprises the step of blending to be.

As one example, the method for producing solid fuel from organic sludge is characterized in that it further comprises a step of forming the organic dry matter separated by deoiling into a solid.

As one example, the solid fuel production method of the organic sludge is characterized in that it further comprises the step of adjusting the temperature so that the temperature of the solid is less than 60 ℃.

The organic sludge drying apparatus according to the present application has an effect of improving energy efficiency through a structural design in which the organic sludge is dried by alternating the first dryer and the second dryer and the heat medium oil is reused.

In addition, the system for converting organic sludge into solid fuel and the manufacturing method for converting organic sludge into solid fuel according to the present application have an effect of continuously producing a large amount of solid fuel by treating organic sludge in a short time.

In addition, there is an effect of reducing environmental pollution by producing solid fuel usable as fuel through environmentally friendly and economical treatment using organic sludge.

In addition, the solid fuel produced according to the present application has a high calorific value, low moisture content and low ash content, so it can be used as an alternative fuel to wood pellets for responding to the Renewable Energy Supply Mandatory System (RPS) of thermal power plants.

1 is a side cross-sectional view showing a dryer included in an organic sludge drying apparatus according to an embodiment of the present invention.
2 is a conceptual diagram showing an organic sludge drying apparatus according to an embodiment of the present invention.
3 is a conceptual diagram showing a system for turning organic sludge into solid fuel according to an embodiment of the present invention.
4 is a conceptual diagram showing a conventional system for converting organic sludge into solid fuel.

Although the present application is specifically described through the following examples and drawings, the scope of the present application is not limited by the following examples. In addition, terms or words used in this specification and claims should not be construed as being limited to ordinary or dictionary meanings, and the inventor appropriately defines the concept of terms in order to explain his/her invention in the best way. It should be interpreted as meaning and concept consistent with the technical idea of the present invention based on the principle that it can be done. In addition, regardless of the reference numerals, the same or corresponding components are assigned the same or similar reference numerals, and duplicate descriptions thereof will be omitted. For convenience of description, the size and shape of each component shown is exaggerated or reduced. It can be.

Therefore, since the embodiments described in this specification and the configurations shown in the drawings are only one embodiment of the present application and do not represent all of the technical spirit of the present invention, various equivalents that can replace them at the time of the present application It should be understood that there may be variations and examples.

The present invention relates to a drying apparatus for organic sludge. 1 is a cross-sectional side view showing a dryer included in an organic sludge drying apparatus according to an embodiment of the present invention, and FIG. 2 is a conceptual diagram showing an organic sludge drying apparatus according to an embodiment of the present invention. Hereinafter, referring to FIGS. 1 and 2, an organic sludge drying apparatus according to the present application will be described.

The term "organic sludge" used in the present invention is waste containing organic matter, and may mean sewage sludge, livestock waste sludge, food sludge, and the like.

An organic sludge drying apparatus according to an embodiment of the present application includes a first dryer 10a and a second dryer 10b, and the first dryer and the second dryer each have a case 11 with an inner space formed therein , An organic sludge inlet 12 formed on the upper side of the case, a heating medium oil injection port 13 formed on the upper side of the case, a heating unit 14 for heating the inside of the case, and an outlet 16 formed on the lower side of the case A deoiler (20) for separating organic dry matter and heat medium oil discharged from the outlet of the first dryer or the second dryer; And the regenerated heat medium oil discharged from the outlet of the first dryer and separated by deoiling is injected into the heat medium oil injection hole formed on the upper side of the case of the second dryer, or discharged from the outlet of the second dryer and separated by deoiling and a regenerated heat medium oil recovery unit 30 for injecting the regenerated heat medium oil into a heat medium oil injection port formed on the upper side of the case of the first dryer.

As an example, the case in which the inner space is formed in the first dryer and the second dryer is not particularly limited as long as it can accommodate organic sludge. It may be in the form of a pillar or the like.

As one example, the organic sludge inlet may be formed on the upper side of the case in which the inner space is formed. The upper side of the case may mean, for example, an upper portion of 70% or more based on the side of the case, or may mean the upper surface of the case. Therefore, the organic sludge inlet may be formed on the upper 70% or more of the side of the case, or may be formed on the upper surface of the case. Considering the input efficiency of the organic sludge, an organic sludge inlet may be formed on the upper surface of the case.

As an example, the heating unit 14 for heating the inside of the case is not particularly limited as long as it can heat the inside of the case, and for example, the inside of the case can be heated by a steam boiler.

As an example, the organic sludge outlet may be formed on the lower side of the case in which the inner space is formed. The lower side of the case may mean, for example, a lower portion of 10% or more based on the side of the case, or may mean the lower surface of the case. Accordingly, the organic sludge outlet may be formed in a lower portion of 10% or less based on the case side surface, or may be formed in the lower surface of the case. Considering the organic sludge discharge efficiency, an organic sludge outlet may be formed on the lower surface of the case.

As an example, the first dryer and the second dryer may each include an agitation unit 15 mixing the organic sludge and the heat medium oil introduced into the inner space. The organic sludge introduced into the dryer can be uniformly mixed with the heat medium oil by the stirring unit, and thus the drying efficiency of the organic sludge can be improved.

As an example, the deoiler 20 is not particularly limited as long as it can separate organic dry matter in the form of dried organic sludge and heat medium oil, and a deoiler applied with a known separation method may be used. For example, a deoiler applied with a centrifugal separation method or a deoiler applied with a multi-disk deoiling method may be used. In the centrifugal separation method, deoiling efficiency is reduced due to clogging of the deoiling net by particulates during the deoiling process, and the replacement cycle of the deoiling net is short. Therefore, it is preferable to use a deoiler applied with a multi-disc deoiling method.

The organic sludge introduced into the inner space of the dryer is mixed with the heat medium oil and dried, and the organic sludge is separated into dried organic matter and heat medium oil by the deoiler. Hereinafter, in the specification of the present application, the heat medium oil separated by deoiling may be referred to as regenerated heat medium oil.

As an example, the regenerated heat medium oil recovery unit 30 injects the regenerated heat medium oil discharged from the discharge port of the first dryer and separated by deoiling into the heat medium oil injection port formed on the upper side of the case of the second dryer, or 2 The regenerated heat medium oil discharged from the outlet of the dryer and separated by deoiling may be injected into the heat medium oil injection hole formed on the upper side of the case of the first dryer. The heat medium oil heated to a high temperature (130 ℃ or more) by the first dryer is separated by a deoiler and injected into the second dryer to recycle the high temperature heat medium oil, and also, the high temperature (130 ℃ or more) by the second dryer Since the heated heat medium oil is separated by a deoiler and injected into the first dryer to recycle the high temperature heat medium oil, the heating time of the first dryer or the second dryer can be drastically shortened and energy efficiency can be improved. can

As an example, the organic sludge drying apparatus may include an organic sludge storage tank 40 for inputting organic sludge into a first dryer or a second dryer. Organic sludge stored in the organic sludge storage tank may be introduced into the case through a sludge inlet formed on the upper side of the case 11 .

As an example, the organic sludge dryer may further include a first heat medium oil storage tank 50 for injecting the first heat medium oil into the first dryer or the second dryer. The first heat medium oil is not particularly limited as long as it can dry organic sludge at high temperature, and a known heat medium oil can be used. For example, vegetable oil, animal oil, light oil, or waste engine oil may be used as the first heat medium oil. The first heat medium oil stored in the heat medium oil storage tank may be injected into a heat medium oil injection port formed on the upper side of the case of the first dryer or the second dryer.

As an example, the first heat medium oil and the regenerated heat medium oil may be injected through the same heat medium oil injection port formed on the upper side of the case of the first dryer or the second dryer. Since the first heat medium oil and the regenerated heat medium oil are injected into the first dryer or the second dryer through one heat medium oil injection port, the material cost of the dryer can be reduced.

As an example, the first heat medium oil and the regenerated heat medium oil may be injected through different heat medium oil injection ports formed on the case upper side of the first dryer or the second dryer. Since the inlet into which the first heat medium oil is injected and the inlet into which the regenerated heat medium oil is injected are separately formed in the upper part of the case, the drying cycle can be shortened more effectively.

The organic sludge drying apparatus may include a control unit 35 for controlling injection amounts of the first heat medium oil and the regenerated heat medium oil injected into the first dryer or the second dryer.

As one example, the control unit may be a gravimetric device capable of measuring the weight of the first heat medium oil or the regenerated heat medium oil.

The control unit may be located in at least one of the first dryer, the second dryer, the deoiler, and the heat medium oil recovery unit. Compared to the weight of the heat medium oil injected into the case of the first or second dryer, the weight of the heat medium oil present in the case after drying, the weight of the heat medium oil separated by deoiling, or the weight of the heat medium oil recovered by the heat medium oil recovery unit Alternatively, the injection amounts of the first heat medium oil and the recycled heat medium oil may be controlled by comparing the weights of the regenerated heat medium oil injected into the second dryer.

As an example, the control unit may control the injected amount of the regenerated heat medium oil injected into the first dryer or the second dryer to be 80% or more compared to the injected amount of the total heat medium oil injected into the first dryer or the second dryer. . In another example, the injected amount of the regenerated heat medium oil injected into the first dryer or the second dryer is about 82% or more, 84% or more, 86% or more, 88% or more, or about 90% or more, and about 98% or less or about 96% or less.

When the injection amount of the regenerated heat medium oil injected into the first dryer or the second dryer is less than about 80% of the total amount of heat medium oil injected into the first dryer or the second dryer, the internal space of the first dryer or the second dryer A large amount of energy may be consumed to raise the first heat medium oil and the regenerated heat medium oil injected into the high temperature of 130 ° C. or higher. Therefore, the energy saving effect may decrease.

As an example, the control unit controls the weight difference between the weight of the total heat medium oil injected into the first dryer and the regenerated heat medium oil discharged through the outlet of the first dryer and separated by deoiling and injected into the second dryer. It can be controlled so that the first heat medium oil is injected into the dryer.

As an example, the control unit controls the weight difference between the total weight of the heat medium oil injected into the second dryer and the weight of the regenerated heat medium oil discharged through the outlet of the second dryer and separated by deoiling and injected into the first dryer. It can be controlled so that the first heat medium oil is injected into the dryer.

Even if the amount of regenerated heat medium oil injected into the first dryer or the second dryer is not constant, it can be supplemented with the first heat medium oil, and therefore, a certain amount of heat medium oil can be injected into the inner space of the first dryer and the second dryer. . For example, if 850 kg of the regenerated heat medium oil discharged through the outlet of the first dryer and separated by deoiling is 1000 kg of the total heat medium oil injected into the first dryer, the heat medium oil injected into the second dryer is the regenerated heat medium oil It can be controlled with 850 kg and 150 kg of first heat medium oil. As another example, in the case of 1000 kg of total heat medium oil injected into the second dryer and 900 kg of regenerated heat medium oil discharged through the outlet of the second dryer and separated by deoiling, the heat medium oil injected into the first dryer is the regenerated heat medium It can be controlled with 900 kg of oil and 100 kg of first heat medium oil. Therefore, the amount of heat medium oil injected into the first dryer and the second dryer can always be maintained at a constant level, thereby improving the continuous drying cycle life.

The invention of the present application also relates to a system for converting organic sludge into solid fuel. 3 is a conceptual diagram showing a system for turning organic sludge into solid fuel according to an embodiment of the present invention. Hereinafter, a system for converting organic sludge into solid fuel according to the present application will be described with reference to FIG. 3 .

A system for turning organic sludge into solid fuel according to an embodiment of the present application includes an organic sludge drying apparatus including a first dryer and a second dryer, and the first dryer and the second dryer alternately run continuously.

The organic sludge drying apparatus including the first dryer and the second dryer may use the organic sludge drying apparatus described above.

The meaning that the first dryer and the second dryer alternately operate may mean that the first dryer and the second dryer sequentially alternately operate, or the second dryer and the first dryer sequentially alternately operate. In addition, the meaning of continuously running in an alternating manner means that the first dryer, the second dryer, the first dryer, and the second dryer are continuously intersected in the same order, or the second dryer, the first dryer, the second dryer, and It may mean continuously crossing and operating in the same order as the first dryer.

The drying sequence of the organic sludge by the first dryer is the injection of heat medium oil (the first heat medium oil, or the first heat medium oil and the regenerated heat medium oil discharged from the outlet of the second dryer and separated by deoiling), by the heating unit Oil heating to the heat medium, organic sludge injection, mixing of the oil and organic sludge with the heat medium by the stirring unit, and separation of the regenerated heat medium oil discharged from the discharge port of the first dryer by deoiling may be performed in this order.

The drying sequence of the organic sludge by the second dryer is heat medium oil injection (first heat medium oil, or first heat medium oil and recycled heat medium oil discharged from the outlet of the first dryer and separated by deoiling), heat medium by the heating unit It may proceed in the order of oil heating, organic sludge injection, mixing of oil and organic sludge in the heat medium by the stirring unit, and separation of the recycled heat medium oil discharged from the outlet of the second dryer by deoiling.

As an example, the cross operation timing of the first dryer and the second dryer may be appropriately adjusted in consideration of efficiency of cross operation. For example, the time of crossing from the first dryer to the second dryer is the time when the drying of the organic sludge by the first dryer or the second dryer is completed, or the drying of the organic sludge by the first dryer or the second dryer It may be the period before the end of

In one embodiment, the crossing time between the first dryer and the second dryer may be after separation of the regenerated heat medium oil discharged from the outlet of the first dryer is completed. Therefore, after the separation of the regenerated heat medium oil discharged from the outlet of the first dryer is completed, the regenerated heat medium oil and the first heat medium oil may be injected into the second dryer.

As another specific example, the crossing time between the first dryer and the second dryer may be before the separation of the reclaimed heat medium oil discharged from the outlet of the first dryer is completed. Therefore, even before the separation of the regenerated heat medium oil discharged from the outlet of the first dryer is completed, the regenerated heat medium oil separated by the separator can be continuously injected into the second dryer.

The solid fuel conversion system of organic sludge can produce a large amount of solid fuel by rapidly treating organic sludge in a short time by continuously operating the first dryer and the second dryer, thereby improving the productivity of manufacturing solid fuel. Energy efficiency can be improved by cross-injecting the high-temperature recycled heat medium oil separated from the first dryer or the second dryer into the first dryer or the second dryer to be recycled for organic sludge drying.

As an example, the system for converting organic sludge into solid fuel has a ratio (D1:D2) of 1: 1 to 1: 3 between organic dry matter (D1) separated by deorganization and organic waste (D2) input from the outside. It may further include a blender 60 for blending so as to be.

As an example, the organic waste is not particularly limited, and may be vegetable residues such as red pepper stems and peanut shells, fermented compost, or sewage sludge carbide.

By mixing the organic dry matter and the organic waste in a ratio of 1: 1 to 1: 3, it may be easy to reach the desired strength and calorific value of the solid fuel. In addition, the recyclability of the waste can be further improved by mixing the organic dry matter and the organic waste in the above ratio.

As an example, the mixing time of the organic dry matter (D1) and the organic waste (D2) may be within 30 minutes. In another example, it may be about 15 minutes or more. When the mixing time satisfies the above range, it may be advantageous to uniformly mix the organic dry matter (D1) and the organic waste (D2).

As an example, the system for converting organic sludge into solid fuel may further include a molding machine 70 for shaping the organic dry matter separated by the deoiler into a solid material. The shape of the solid material to be molded by the molding machine is not particularly limited, and may be formed into, for example, a pellet form.

As an example, the system for converting organic sludge into solid fuel may include a temperature controller 80 that adjusts the temperature of the solid produced from the molding machine to be less than 60°C. The solid material molded by the molding machine is highly likely to spontaneously ignite when the temperature is at a high temperature of 60° C. or higher. The temperature controller 80 may prevent spontaneous combustion of the solid by controlling the temperature of the solid formed by the molding machine to be less than 60 °C.

As an example, the system for converting organic sludge into solid fuel may further include a cooler 90 for cooling water vapor discharged from the first dryer or the second dryer. When the organic sludge introduced into the first dryer or the second dryer is mixed with high-temperature heat medium oil, a large amount of moisture contained in the organic sludge is evaporated and discharged to the outside, causing odor. The cooler included in the system for converting organic sludge into solid fuel is connected to the steam outlet formed on the upper side of the first dryer or the second dryer to cool the water vapor generated in the first dryer or the second dryer to effectively reduce odor generation. there is.

The invention of this application also relates to a method for producing solid fuel of organic sludge.

A method for producing solid fuel from organic sludge according to an embodiment of the present invention includes the steps of mixing and drying the organic sludge introduced into the first dryer and the heat medium oil injected into the first dryer under atmospheric pressure, separating the organic dried material and the heat medium oil A first process including a step of injecting the separated recycled heat medium oil into a second dryer; And mixing and drying the organic sludge and the injected heat medium oil introduced into the second dryer under normal pressure, separating the dried organic dried material and the heat medium oil with a deoiler, and injecting the separated regenerated heat medium oil into the first dryer It includes a second process comprising the step of doing.

In the method of converting organic sludge into solid fuel, the first process and the second process may use an organic sludge drying apparatus including the above-described first dryer and second dryer.

The first process and the second process may be performed under atmospheric pressure. The conventional vapor deposition drying process has been performed under reduced pressure. When organic sludge is injected into a dryer, heat medium oil is injected, or organic sludge is mixed with heat medium oil and dried, the pressure of the dryer may increase and thus proceed with reduced pressure again Therefore, the time required for manufacturing solid fuel is increased by that much. The invention of the present application can perform the first process and the second process under normal pressure, and therefore, even when organic sludge is injected into the dryer, heat medium oil is injected, or organic sludge is mixed with heat medium oil and dried, the pressure of the dryer is reduced. A separate process for depressurization is not required, and the time required for producing solid fuel can be shortened.

As an example, the first process and the second process may be continuously operated by crossing each other. Since the first process and the second process are alternately operated continuously, organic sludge can be rapidly treated in a short time to produce a large amount of solid fuel, thereby improving productivity of solid fuel.

As an example, the injected amount of the regenerated heat medium oil injected into the first dryer or the second dryer relative to the injected amount of the total heat medium oil injected into the first dryer or the second dryer may be controlled to be 80% or more. In another example, the injection amount of the regenerated heat medium oil injected into the first dryer or the second dryer is controlled to be about 82% or more relative to the injection amount of the total heat medium oil injected into the first dryer or the second dryer, so that the first dryer or the second dryer The amount of energy consumed to raise the first heat medium oil and the regenerated heat medium oil injected into the inner space of the dryer to a high temperature of 130 ° C. or higher can be reduced.

delete

delete

The mixing temperature range of the organic sludge and the heat medium oil may be, for example, about 135 ° C or higher, 140 ° C or higher, 145 ° C or higher, 150 ° C or higher, 155 ° C or higher or about 160 ° C or higher, or about 185 °C or less, or about 180 °C or less. In addition, the mixing time of the organic sludge and the heat medium oil may be about 10 minutes or more or about 15 minutes or more, or about 55 minutes or less, 50 minutes or less, 45 minutes or less, or about 40 minutes or less.

In the case of mixing and drying the organic sludge and the heat medium oil during the above temperature range and mixing time, it may be advantageous to control the moisture content of the organic dry matter to be 10 wt% or less.

As an example, the solid fuel production method of the organic sludge is a ratio of 1: 1 to 1: 3 (D1: D2) of organic dry matter (D1) separated by deorganization and organic waste (D2) input from the outside A blending step may be further included. The organic waste is not particularly limited, and may be vegetable residues such as cayenne pepper, peanut shells, or the like, or sewage sludge carbide. By mixing the organic dry matter and the organic waste in a ratio of 1: 1 to 1: 3, it may be easy to reach the desired strength and calorific value of the solid fuel.

As an example, the method of producing solid fuel from organic sludge may further include forming the organic dry matter separated by deoiling into a solid.

As one example, the method of producing solid fuel from organic sludge may further include adjusting the temperature so that the temperature of the solid is less than 60 °C. Spontaneous ignition of solids can be prevented by controlling the temperature of the solids to be less than 60 °C.

Hereinafter, the configuration of the present invention and its effects will be described in more detail through Examples and Comparative Examples. However, these examples are for explaining the present invention in more detail, and the scope of the present invention is not limited to these examples.

Example

The organic sludge was dried by applying the solid fuel conversion system of organic sludge configured as shown in FIG. 3 . Specifically, after injecting 1,200 kg of vegetable oil, which is the first heat medium oil, into the first dryer and heating it to 130 ° C, 500 kg of sewage sludge having a moisture content of 80 wt% was added as organic sludge and mixed with high-temperature heat medium oil to form organic sludge dried Thereafter, the organic drying material and the heat medium oil discharged to the first dryer were separated by a deoiler, and the separated high-temperature regenerated heat medium oil and the first heat medium oil were injected into the second dryer. At this time, the injected amount of the regenerated heat medium oil was set to be about 85% of the injected amount of the regenerated heat medium oil injected into the second dryer compared to the injected amount of the total heat medium oil injected into the first dryer. After injecting the heat medium oil into the second dryer, 500 kg of sewage sludge having a moisture content of 80 wt% was added as organic sludge and mixed with the high-temperature heat medium oil to dry the organic sludge.

comparative example

The organic sludge was dried by applying the solid fuel conversion system of organic sludge configured as shown in FIG. 4 . Specifically, after injecting 1,200 kg of vegetable oil, which is the first heat medium, into the first dryer, heating it to 130 ° C, adding 500 kg of sewage sludge having a water content of 80 wt% as organic sludge and mixing with high temperature heat medium oil to dry the organic sludge made it Thereafter, the organic dry matter and the heat medium oil discharged to the dryer were separated by a deoiler, and the separated high-temperature regenerated heat medium oil and the first heat medium oil were injected into the dryer. After injecting the heat medium oil into the dryer, 500 kg of sewage sludge having a water content of 80 wt% was added as organic sludge and mixed with the high temperature heat medium oil to dry the organic sludge.

Experimental Example

In order to examine the efficiency of the manufacturing process of the organic sludge drying apparatus, an experiment was conducted to measure the drying time of the same amount of organic sludge with the solid fuel conversion system of organic sludge according to the above Examples and Comparative Examples. In the case of the comparative example, after all of the dried material and the heat medium oil dried by the dryer are discharged through the outlet, the regenerated heat medium oil is separated by the deoiler and the separated regenerated heat medium oil and the first heat medium oil can be injected into the dryer. The drying process is relatively long, and the continuity of the drying process is poor. In addition, since the high-temperature (130 ° C. or higher) regenerated heat medium oil discharged from the dryer is cooled by the deoiling time, the cooled regenerated heat medium oil (about 70 ° C. to 80 ° C.) must be reheated to a high temperature of 130 ° C. or higher. Therefore, energy consumption is relatively large. In contrast, in the case of the embodiment, the regenerated heat medium oil discharged from the first dryer can be continuously injected into the second dryer by the heat medium oil recovery oil unit by deoiling the recycled heat medium oil discharged from the deoiler, and thus discharged at high temperature. The cooling time of the heating medium oil is relatively short, so the degree of cooling is low, and therefore the energy consumption for reheating is relatively small. In addition, since the first dryer and the second dryer continuously progress while crossing each other, the drying process is relatively short and the continuity of the drying process is improved.

1: dryer
2: degasser
3: Regeneration heat medium oil reservoir
4: organic sludge storage tank
5: first heat medium oil reservoir
6: blender
7: molding machine
10: dryer
10a: first dryer
10b: second dryer
11: case with internal space formed
12: organic sludge inlet
13: heat medium oil inlet
14: heating unit
15: stirring unit
16: outlet
20: degasser
30: regeneration heat medium oil recovery unit
40: organic sludge storage tank
50: first heat medium oil reservoir
60: blender
70: molding machine
80: thermostat
90: cooler
100: drying device
200: drying system
200a: drying system

Claims (21)

It includes a first dryer 10a and a second dryer 10b,
The first dryer and the second dryer each have a case 11 having an inner space, an organic sludge inlet 12 formed on the upper side of the case, a heat medium oil inlet 13 formed on the upper side of the case, Heating the inside of the case It includes a heating unit 14, and an outlet 16 formed on the lower side of the case,
a deoiler (20) for separating organic dry matter and heat medium oil discharged from the outlet of the first dryer or the second dryer;
The regenerated heat medium oil discharged from the outlet of the first dryer and separated by deoiling is injected into the heat medium oil injection hole formed on the upper side of the case of the second dryer, or discharged from the outlet of the second dryer and separated by deoiling. a regenerated heat medium oil recovery unit 30 for injecting heat medium oil into a heat medium oil injection port formed on the upper side of the case of the first dryer; and
A drying apparatus (100) for organic sludge including a first heat medium oil storage tank (50) for injecting the first heat medium oil into a first dryer or a second dryer. According to claim 1,
An organic sludge drying apparatus further comprising an organic sludge storage tank 40 for inputting the organic sludge to a first dryer or a second dryer. According to claim 1,
The first heat medium oil and the regenerated heat medium oil are injected through the same heat medium oil inlet formed on the upper side of the case of the first dryer or the second dryer. According to claim 1,
A drying apparatus for organic sludge in which the first heat medium oil and the regenerated heat medium oil are injected through different heat medium oil injection ports formed on the upper side of the case of the first dryer or the second dryer. According to claim 1,
Organic sludge drying apparatus comprising a control unit (35) for controlling the injection amount of the first heat medium oil and the regenerated heat medium oil injected into the first dryer or the second dryer. According to claim 5,
The control unit controls the injection amount of the regenerated heat medium oil injected into the first dryer or the second dryer to be 80% or more relative to the injection amount of the total heat medium oil injected into the first dryer or the second dryer Drying device of organic sludge. According to claim 5,
The control unit transfers the first heat medium to the second dryer by the weight difference between the weight of the total heat medium oil injected into the first dryer and the regenerated heat medium oil discharged through the outlet of the first dryer, separated by deoiling, and injected into the second dryer. Organic sludge drying device that controls oil injection. According to claim 5,
The control unit transfers the first heat medium to the first dryer by a difference in weight between the total weight of the heat medium oil injected into the second dryer and the weight of the regenerated heat medium oil discharged through the outlet of the second dryer, separated by deoiling, and injected into the first dryer. Organic sludge drying device that controls oil injection. Including a drying device for the organic sludge of claim 1,
The first dryer and the second dryer are organic sludge solid fuel conversion system that continuously runs alternately. delete According to claim 9,
A system for converting organic sludge into solid fuel, further comprising a forming machine (70) for forming the organic dry matter separated by the deoiler into a solid material. According to claim 11,
A system for turning organic sludge into solid fuel, comprising a temperature controller (80) for adjusting the temperature of the solid produced from the molding machine to be less than 60°C. According to claim 9,
A system for turning organic sludge into solid fuel, further comprising a cooler (90) for cooling water vapor discharged from the first dryer or the second dryer. In the solid fuel production method of organic sludge produced by using the organic sludge drying apparatus of claim 1,
Mixing and drying the organic sludge introduced into the first dryer and the heat medium oil injected into the first dryer under atmospheric pressure, separating the organic dry matter and the heat medium oil, and injecting the separated regenerated heat medium oil into the second dryer 1st process including; and
Mixing and drying the organic sludge and the injected heat medium oil introduced into the second dryer under atmospheric pressure, separating the dried organic dried material and the heat medium oil with a deoiler, and injecting the separated regenerated heat medium oil into the first dryer A method for producing solid fuel from organic sludge, comprising: a second process comprising the steps of: 15. The method of claim 14,
The first process and the second process are continuously operated by alternating organic sludge solid fuel production method. 15. The method of claim 14,
Organic sludge in which the injection amount of the regenerated heat medium oil injected into the first dryer or the second dryer is controlled to be 80% or more relative to the total amount of heat medium oil injected into the first dryer or the second dryer. Method for producing solid fuel. delete delete delete 15. The method of claim 14,
A method for producing solid fuel from organic sludge, further comprising forming the organic dry matter separated by deoiling into a solid. 21. The method of claim 20, further comprising the step of adjusting the temperature so that the temperature of the solid is less than 60 °C.