KR101908228B1 - Manufacturing method for biomass fuel throuth optimizing pretreatment temperature - Google Patents

Abstract

Disclosed is an invention related to a manufacturing method of biomass fuel. The manufacturing method of biomass fuel according to a specific embodiment includes: a step of determining the heat treatment completion temperature of a biomass pretreatment process; and a step of pretreatment of heating the biomass to the determined heat treatment completion temperature. According to an embodiment of the present invention, the heat generation efficiency of the biomass fuel can be maximized through the manufacturing method.

Description

TECHNICAL FIELD [0001] The present invention relates to a method for manufacturing a biomass fuel by optimizing a pretreatment temperature,

The present invention relates to a method for producing biomass fuels through pre-treatment temperature optimization. More particularly, the present invention relates to a method for manufacturing biomass fuel through optimization of the pre-treatment temperature, which can maximize the heating efficiency of the biomass fuel through optimization of the pre-treatment temperature.

One of the biggest issues in the steel industry in recent years is the reduction of carbon dioxide (CO ₂ ) emissions to prevent global warming. By reducing carbon dioxide emissions, it is possible to reduce the amount of input carbon, or to store the carbon dioxide in the deep sea or underground after it is collected, or to replace conventional fossil fuel carbon sources such as coal and petroleum with carbon neutral biomass There is a way.

The biomass is widely applied to building timber and waste materials, forests and agricultural byproducts. The use of biomass as a fossil fuel in terms of fuel is a good substitute for reducing the amount of carbon dioxide, but the application range of biomass is limited due to the lack of effective treatment methods for biomass fueling. The main reason is that biomass is an organic compound composed of carbon, hydrogen and oxygen like existing fossil fuels, but because it has a low water content and a calorific value per volume (heating value of 16.2MJ / kg with moisture of 16.2MJ / kg) It is inefficient to be applied as fuel. Therefore, proper pretreatment conditions are important process variables in the production of fuel using biomass.

BACKGROUND ART [0002] The background art of the present invention is disclosed in Korean Patent Laid-Open Publication No. 2016-0132165 (published on November 17, 2016, entitled "Biomass Treatment Method").

According to one embodiment of the present invention, there is provided a biomass fuel production method capable of maximizing heat generation efficiency of biomass fuel.

According to one embodiment of the present invention, there is provided a biomass fuel production method excellent in the accuracy and reliability of the predicted value of the pretreatment temperature.

According to one embodiment of the present invention, there is provided a biomass fuel production method capable of reducing the production cost of the biomass fuel and the transportation cost by reducing the fuel volume.

One aspect of the present invention relates to a method for producing biomass fuel. In one embodiment, the biomass fuel manufacturing method includes determining a heat treatment termination temperature of the biomass pretreatment process; And a pretreatment step of heating the biomass to the determined heat treatment termination temperature, wherein the step of determining the heat treatment termination temperature of the biomass pretreatment step comprises: preparing a biomass sample of the same kind as the biomass; Heating the sample to obtain relationship data on the volume change amount of the sample according to a change in normalizing temperature defined by Equation 1 below; Setting an equation (2) defining a volume change ratio of the sample using the relationship data; Deriving a correlation equation between the volume change ratio of Equation 2 and the normalizing temperature of Equation 1; And deriving from the correlation equation a first normalizing temperature interval that is a normalizing temperature interval at a time point at which the slope of the correlation equation becomes zero:

[Formula 1]

Normalizing temperature = Biomass sample heating temperature (캜) / Maximum heating temperature (캜)

(Wherein the maximum heating temperature is a heating temperature at the time when the volume of the biomass sample reaches a minimum value)

[Formula 2]

Volume change ratio (L / 占 폚) =? Volume (L) /? Heating temperature (占 폚)

Wherein the heating temperature is the heating temperature of the biomass sample - the initial temperature of the biomass sample, and the? Volume is the bio-mass temperature of the biomass sample measured at the heating temperature, Mass of the mass sample).

Deriving a second normalizing temperature section using the relational data of the calorific value of the sample according to the change of the normalizing temperature when the biomass sample is heated in one embodiment; And comparing the first normalizing temperature section with the second normalizing temperature section.

In one embodiment, the step of deriving the second normalizing temperature section may include the steps of: obtaining, when heating the biomass sample, relational data of the calorific value of the sample according to a change in the normalizing temperature; Setting equation (3) defining the energy density variation of the sample using the relationship data; Deriving a correlation equation between the energy density variation of Equation 3 and the normalizing temperature of Equation 1; And deriving, from the correlation equation, a second normalizing temperature interval that is a normalizing temperature interval at which the slope of the correlation equation becomes zero:

[Formula 3]

(Mcal / kg / L / 占 폚) =? Heating value (Mcal / kg) /? Volume (L) /? Heating temperature (占 폚)

(In the above formula 3, the DELTA calorific value is the calorific value measured at the heating temperature of the biomass sample - the calorific value of the biomass sample measured at the initial temperature, and the DELTA volume and DELTA heating temperature are same).

In one embodiment, when the first normalizing temperature and the second normalizing temperature range coincide with each other, a matching period of the first normalizing temperature and the second normalizing temperature is determined as a heat treatment termination temperature range of the biomass pretreatment process ; ≪ / RTI >

In one embodiment, the biomass may include one or more of livestock manure, wood, rice straw, sugarcane, and corn.

It is possible to maximize the heating efficiency of the biomass fuel when applying the biomass fuel production method of the present invention and to improve the accuracy and reliability of the prediction value of the pretreatment temperature and to reduce the production cost of the biomass fuel and the transportation cost Can be saved.

1 shows a method of producing a biomass fuel according to one embodiment of the present invention.
FIG. 2 is a graph showing the volume change according to the temperature of the normalizing temperature during the heating of the biomass sample according to one embodiment of the present invention.
FIG. 3 is a graph showing a correlation between the volume change ratio and the normalizing temperature of the biomass sample according to one embodiment of the present invention.
FIG. 4 is a graph showing a change in calorific value according to the temperature of the normalizing temperature during the heating of the biomass sample according to one embodiment of the present invention.
FIG. 5 is a graph showing a correlation between the energy density change amount and the normalizing temperature of the biomass sample according to another embodiment of the present invention.

Hereinafter, the present invention will be described in detail. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather unclear.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to be exemplary, self-explanatory, allowing for equivalent explanations of the present invention.

Through pre-treatment temperature optimization Biomass  Fuel production method

One aspect of the present invention relates to a method for producing biomass fuel through pre-treatment temperature optimization. 1 shows a method of producing a biomass fuel according to one embodiment of the present invention. Referring to FIG. 1, the method for producing a biomass fuel includes the steps of: (S10) determining a heat treatment termination temperature of a biomass pretreatment process; And (S20) heating the biomass to the determined heat treatment termination temperature.

In one embodiment of the invention, the biomass may comprise one or more of livestock manure, wood, rice straw, sugarcane and corn.

In one embodiment, the step (S10) of determining the heat treatment termination temperature of the biomass pretreatment step comprises: (S101) preparing a biomass sample of the same kind as the biomass; (S102) heating the sample to obtain data on the volume change amount of the sample according to a change in normalizing temperature defined by Equation 1 below; (S103) setting equation (2) defining the volume change ratio of the sample using the relationship data; (S104) deriving a correlation equation between the volume change ratio of the equation (2) and the normalizing temperature of the equation (1); And (S105) deriving, from the correlation equation, a first normalizing temperature interval that is a normalizing temperature interval at a time when the slope of the correlation equation becomes zero:

[Formula 1]

Normalizing temperature = Biomass sample heating temperature (캜) / Maximum heating temperature (캜)

(In the above formula (1), the maximum heating temperature is a heating temperature at a time point at which the volume of the biomass sample reaches a minimum value (i.e., a time point at which the biomass sample is carbonized)

[Formula 2]

Volume change ratio (L / 占 폚) =? Volume (L) /? Heating temperature (占 폚)

Wherein the heating temperature is the heating temperature of the biomass sample - the initial temperature of the biomass sample, and the? Volume is the bio-mass temperature of the biomass sample measured at the heating temperature, Mass of the mass sample).

FIG. 2 is a graph showing a volume change according to the temperature of the normalizing temperature during the heating of the biomass sample according to one embodiment of the present invention. Referring to FIG. 2, it can be seen that as the normalizing temperature increases, the amount of change in the volume of the biomass sample decreases, but is not further reduced but saturated.

FIG. 3 is a graph showing a correlation between the volume change ratio and the normalizing temperature of the biomass sample according to one embodiment of the present invention.

3, the volume change ratio of the biomass sample gradually increases while the normalizing temperature of the biomass sample is increased (i.e., the more the biomass sample is heated close to the maximum heating temperature), and the normalizing temperature Is 0.7 (the slope of the correlation equation becomes 0).

Referring to FIG. 3, when deriving the first normalizing temperature range using the relational data, the first normalizing temperature at which the volume change ratio becomes zero can be predicted without conducting a direct experiment, When the biomass pretreatment is carried out, it is possible to prevent production of excess costs by reducing the production cost, and it is possible to have excellent transportation cost saving effect and excellent accuracy and reliability of predicted value of heat treatment termination temperature.

According to another embodiment of the present invention, there is provided a method for producing a biomass material, comprising the steps of: (a) heating a biomass sample; (S106) deriving a second normalizing temperature section using relational data of a calorific value of the sample with a change in the normalizing temperature; And (S107) comparing the first normalizing temperature section with the second normalizing temperature section.

In one embodiment, the step of deriving the second normalizing temperature section (S106) includes the steps of: obtaining, when heating the biomass sample, relational data of the calorific value of the sample according to the change in the normalizing temperature; Setting equation (3) defining the energy density variation of the sample using the relationship data; Deriving a correlation equation between the energy density variation of Equation 3 and the normalizing temperature of Equation 1; And deriving, from the correlation equation, a second normalizing temperature interval that is a normalizing temperature interval at which the slope of the correlation equation becomes zero:

[Formula 3]

Energy density variation (Mcal / kg / L / 占 폚) =? Heating value (Mcal / kg) /? Volume (L) /? Heating temperature (占 폚)

(In the above formula 3, the DELTA calorific value is the calorific value measured at the heating temperature of the biomass sample - the calorific value of the biomass sample measured at the initial temperature, and the DELTA volume and DELTA heating temperature are same).

FIG. 4 is a graph illustrating a change in calorific value with temperature change of a biomass sample according to one embodiment of the present invention. Referring to FIG. 4, it can be seen that as the normalizing temperature increases, the calorific value of the biomass sample is increased, but is not increased any more and is saturated.

FIG. 5 is a graph showing a correlation between the energy density change amount and the normalizing temperature of the biomass sample according to another embodiment of the present invention. Referring to FIG. 5, as the normalizing temperature of the biomass sample increases (that is, as the biomass sample is heated close to the maximum heating temperature), the energy density variation of the biomass sample gradually increases, Is 0.7 (the slope of the correlation equation becomes 0).

Since the energy density of the biomass sample is no longer increased when heated above the saturation interval, the energy density is disadvantageous in terms of energy. Therefore, a direct experiment is performed using a correlation formula derived for estimating the energy density saturation interval per unit temperature It is possible to predict the energy density saturation section without fail, and the accuracy and reliability of the temperature predicted value can be excellent.

In one embodiment, when the derived first normalizing temperature and the second normalizing temperature range coincide with each other, a matching period of the first normalizing temperature and the second normalizing temperature is set as a heat treatment termination temperature range of the biomass pre- And determining the number of times the data is transmitted.

3 and 5, a first normalizing temperature section in which the volume change ratio of the biomass sample is 0, and a second normalizing temperature section in which the energy density variation amount of the biomass sample is zero , And each of them is 0.7, so that a general engineer can synthesize them to calculate the heat treatment termination temperature during the pre-treatment process.

The pretreatment process of biomass fuel should proceed according to the optimum pretreatment condition since it increases the fuel value of the biomass and the fuel cost also increases.

In the pretreatment process of the present invention, it is possible to maximize the heating efficiency of the biomass fuel during the production of the biomass fuel by applying the heat treatment termination temperature, to provide an accurate and reliable prediction of the preliminary treatment temperature and to reduce the production cost of the biomass fuel, The transportation cost due to the reduction in the fuel volume can be reduced.

Hereinafter, the configuration and operation of the present invention will be described in more detail with reference to preferred embodiments of the present invention. It is to be understood, however, that the same is by way of illustration and example only and is not to be construed in a limiting sense.

Example  And Comparative Example

Example

(One) Biomass  Determination of pre-treatment termination temperature

(a) Derivation of the first normalizing temperature zone: A biomass sample (livestock manure) of the same kind as the biomass fuel to be produced is prepared and then heated to produce a normalizing zone defined by the following formula (1) The relationship data of the volume change amount of the sample according to the change of the temperature was obtained and the equation 2 for defining the volume change ratio of the sample was set using the relationship data. Next, as shown in FIG. 3, a correlation equation between the volume change ratio of the equation (2) and the normalizing temperature of the equation (1) is derived, and from the correlation equation, the normalizing temperature at the time when the slope of the correlation equation becomes 0 Lt; RTI ID = 0.0 > normalizing < / RTI >

[Formula 1]

Normalizing temperature = Biomass sample heating temperature (캜) / Maximum heating temperature (캜)

(Wherein the maximum heating temperature is a heating temperature at the time when the volume of the biomass sample reaches a minimum value)

[Formula 2]

Volume change ratio (L / 占 폚) =? Volume (L) /? Heating temperature (占 폚)

Wherein the heating temperature is the heating temperature of the biomass sample - the initial temperature of the biomass sample, and the? Volume is the bio-mass temperature of the biomass sample measured at the heating temperature, Mass of the mass sample).

As a result, as shown in FIG. 3, the first normalizing temperature section, which is the normalizing temperature section at the time when the slope of the correlation equation becomes zero, was 0.7.

(b) Derivation of the second normalizing temperature section: When the biomass sample is heated, relationship data of the calorific value of the sample following the change of the normalizing temperature as shown in Fig. 4 is obtained, (3) " (3) " Next, as shown in FIG. 5, a correlation equation between the energy density change amount of Equation 3 and the normalizing temperature of Equation 1 is derived, and from the above correlation equation, a normalizing temperature section at the time when the slope of the above- , A second normalizing temperature interval was derived: < RTI ID = 0.0 >

[Formula 3]

Energy density variation (Mcal / kg / L / 占 폚) =? Heating value (Mcal / kg) /? Volume (L) /? Heating temperature (占 폚)

(In the above formula 3, the DELTA calorific value is the calorific value measured at the heating temperature of the biomass sample - the calorific value of the biomass sample measured at the initial temperature, and the DELTA volume and DELTA heating temperature are same).

As shown in FIG. 5, the second normalizing temperature section, which is the normalizing temperature section at the time when the slope of the correlation equation becomes zero, was 0.7.

Then, the first normalizing temperature section and the second normalizing temperature section were compared. The first and second normalizing temperature ranges were 0.7, and the heat treatment termination temperature during the pretreatment of the biomass (livestock manure) was set at 70% of the maximum heating temperature of the biomass sample.

(2) Biomass  Pretreatment

In the biomass pretreatment step, the heat treatment termination temperature was heated to a temperature of 70% of the maximum heating temperature and pretreated, and the biomass fuel was produced through ordinary processes.

Comparative Example  One

The biomass fuel was prepared in the same manner as the above example except that the pre-treatment was performed by heating the heat treatment termination temperature to 65% of the maximum heating temperature in the pretreatment step of the biomass.

Comparative Example  2

The biomass fuel was prepared in the same manner as in the previous example, except that the pretreatment was performed by heating the heat treatment termination temperature to a temperature exceeding 70% of the maximum heating temperature in the biomass pretreatment step.

The volume change rate of the biomass after the pretreatment with respect to the calorific value, (Mcal / kg), and the biomass volume before the pretreatment was evaluated for the biomass fuel of the above-described Examples and Comparative Examples 1 and 2, Respectively.

division Calorific value
(Mcal / kg) Before / after pretreatment volume
Rate of change (%) Example 5.80 55 Comparative Example 1 5.50 58 Comparative Example 2 5.85 51

Referring to the results of Table 1, in the case of Comparative Example 1 in which the heat treatment termination temperature of the present invention was lower than that of the present invention, the heating value was lower than that in the above Examples. The difference in calorific value is small, but the volume of biomass is remarkably reduced due to excessive carbonization, and the economic efficiency is lowered.

It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (5)

Determining a heat treatment termination temperature of the biomass pretreatment process; And
And a pre-treatment step of heating the biomass to the determined heat treatment termination temperature,
The step of determining the heat treatment termination temperature of the biomass pre-
Preparing a biomass sample of the same kind as the biomass;
Heating the sample to obtain relationship data on the volume change amount of the sample according to a change in normalizing temperature defined by Equation 1 below;
Setting an equation (2) defining a volume change ratio of the sample using the relationship data;
Deriving a correlation equation between the volume change ratio of Equation 2 and the normalizing temperature of Equation 1;
Deriving from the correlation equation a first normalizing temperature section that is a normalizing temperature section at a time when the slope of the correlation equation becomes zero;
Deriving a second normalizing temperature section using the relationship data of the calorific value of the sample according to the change of the normalizing temperature when the biomass sample is heated;
Comparing the first normalizing temperature section with the second normalizing temperature section; And
And determining a coincidence section of the first normalizing temperature and the second normalizing temperature as the heat treatment termination temperature section of the biomass pre-treatment process when the first normalizing temperature and the second normalizing temperature section coincide with each other Respectively,
Wherein deriving the second normalizing temperature section comprises:
Obtaining, when heating the biomass sample, data on the relationship between the heating value of the sample and the variation of the normalizing temperature;
Setting equation (3) defining the energy density variation of the sample using the relationship data;
Deriving a correlation equation between the energy density variation of Equation 3 and the normalizing temperature of Equation 1; And
And deriving a second normalizing temperature section, which is a normalizing temperature section at a time point at which the slope of the correlation equation becomes zero, from the correlation equation,
[Formula 1]
Normalizing temperature = Biomass sample heating temperature (캜) / Maximum heating temperature (캜)
(Wherein the maximum heating temperature is a heating temperature at the time when the volume of the biomass sample reaches a minimum value)
[Formula 2]
Volume change ratio (L / 占 폚) =? Volume (L) /? Heating temperature (占 폚)
Wherein the heating temperature is the heating temperature of the biomass sample - the initial temperature of the biomass sample, and the? Volume is the bio-mass temperature of the biomass sample measured at the heating temperature, Mass of the mass sample).
[Formula 3]
(Mcal / kg / L / 占 폚) =? Heating value (Mcal / kg) /? Volume (L) /? Heating temperature (占 폚)
(In the above formula 3, the DELTA calorific value is the calorific value measured at the heating temperature of the biomass sample - the calorific value of the biomass sample measured at the initial temperature, and the DELTA volume and DELTA heating temperature are same).
delete delete delete The method according to claim 1,
Wherein the biomass comprises at least one of livestock manure, wood, rice straw, sorghum and maize.

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