KR20210049010A - The fuel composition including the cast of black soldier fly - Google Patents

Abstract

The present invention relates to a fuel composition including cast of black soldier fly. According to the present invention, a fuel composition including cast of black soldier fly increases economic efficiency by recycling resources by using cast of black soldier fly, bio-oil, wood waste and tropical fruit peel, shows excellent fuel quality by increasing calorific value, and has excellent durability such as tensile strength, and thus has an effect of improving convenience such as transportation and storage.

Description

The fuel composition including the cast of black soldier fly}

The present invention relates to a fuel composition including fecal soil in Dongae et al., and more particularly, to a fuel composition that can be used for heating or the like as a solid fuel.

Currently, organic wastes such as food wastes discharged from homes and restaurants, organic wastes from industrial sites, livestock meals and human meals from livestock sheds can cause serious environmental problems in soil and rivers if they are discharged without treatment.

Conventionally, a method of recycling organic waste as feed or compost for livestock through a specific treatment process, a method of landfilling in a certain area or dumping in the ocean was mainly used, but in this case, the economical efficiency is low in terms of the installation cost and maintenance cost of the treatment device. There is this. In addition, when the discharged material is used as feed, side effects such as lumping are large, and composting also has problems such as reheating and ineffectiveness imbalance.

In addition, Korea, which has a high energy dependence on petroleum, is experiencing many difficulties nationally due to the recent unstable international oil price market. To overcome this, a number of policies on the development of green energy and new and renewable energy have been announced as a national policy, and the efforts of companies to realize this are also urgent.

Wood pellets, one of the related technologies, have excellent combustion efficiency due to densification, excellent ignition and preservation properties, small size, very easy to store and transport, and have eco-friendly advantages due to low sulfur content and ash content.

However, since wood pellets use wood or wood by-products as the main raw material, the production volume and cost competitiveness of wood pellets are inferior in Korea, where wood resources are not abundant. Due to its low content, the durability of the pellets is low, and there are disadvantages of using an additional binder.

Accordingly, Korean Patent Registration No. 10-1771210 discloses a composition for fuel including fecal soil and fat in Dongae, etc., but there is a need to improve its performance.

Korean Patent Registration No. 10-1771210

The present invention was conceived to solve the above problems, and an object of the present invention is to provide a composition for fuel with improved performance by additionally using a recycled material capable of improving the performance of fecal soil and fuel in Dongae and the like.

The present invention provides a fuel composition comprising 1 to 30 parts by weight of bio oil, 10 to 50 parts by weight of wood waste, and 20 to 100 parts by weight of tropical fruit peels based on 100 parts by weight of fecal soil in Dongae et al.

The bio-oil, wood waste, and tropical fruit peel may be included in a weight ratio of 1: 1 to 5: 2 to 10.

The Dongae-deunge fecal soil may be obtained by removing Dongae-eung-e from the product obtained by treating the organic waste by Dongae-eung-e.

The bio-oil may be an insect oil obtained by compressing and milking adult insects or larvae.

The fuel composition of the present invention uses fecal soil, bio-oil, wood waste, and tropical fruit peels in Dongae, etc. to increase economic efficiency, increase calorific value to show excellent fuel quality, and has excellent durability such as tensile strength to transport and There is an effect of improving convenience such as storage.

Hereinafter, the present invention will be described in detail with reference to the drawings. The terms or words used in the specification and claims should not be construed as being limited to their usual or dictionary meanings, and the inventor may appropriately define the concept of terms in order to describe his own invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention based on the principle that there is.

The present invention provides a composition for fuel including fecal soil, bio-oil, wood waste, and tropical fruit peels to Dongae et al.

The Dongae et al. fecal soil may preferably include those obtained by treating organic wastes with Dongae et al.

For example, the fecal soil in the Dongae etc. may mean that the larvae in the Dongae etc. consume and digest organic waste and then excrete them.

The Dongae etc. fecal soil may be a whole product obtained by treating organic wastes with Dongae etc., and may be a product removing Dongae etc. by separating Dongae etc. from the fecal soil after the manufacture of the fecal soil.

In general, in Dongae et al., the growth period from egg to adult is 37 to 41 days, and the period of larval state acting as a decomposer is about 14 days.

If 5,000 larvae are added to Dongae etc. to 10kg of food waste, more than 80% of the food waste is decomposed in about 5 days, and the volume of the decomposed food waste is about 42% and the weight is reduced to about 70% compared to before the larvae were added. Dongae et al. larvae have a much more effective advantage when dealing with organic wastes in Dongae et al. because the period for decomposing organic waste resources is longer than that of earthworms and houseflies.

Dongae et al. larvae are difficult to live at temperatures below about 27℃, and produce fecal soil by treating organic waste while actively moving at temperatures between 30℃ and 42℃. In addition, larvae in Dongae et al. have the habit of crawling out to find a dry place to become a pupa after about 14 days, which is the period of larvae that can decompose organic waste.

The organic waste may be any one or more selected from the group consisting of livestock manure, organic sludge, and food waste, but is not limited thereto.

The Dongae et al. fecal soil may be obtained by treating organic waste with eggs, larvae, or a mixture thereof.

The fecal soil may have a moisture content of 1 to 20%, preferably 7 to 15%.

If the moisture content of the fecal soil is less than the stated range, it is advantageous in terms of combustion efficiency, but the time and cost required for drying increase and the stability after molding is reduced.If the moisture content of the fecal soil is exceeded, the fuel is solidified by steam generated during the molding process. Defects and the like may occur in the composition.

Meanwhile, in addition to fecal soil, fecal soil of other insects may be mixed in Dongae, etc., for example, fecal soil such as slugs, stag beetles, longevity beetles, and other pet insects may be additionally used.

In addition, the type of bio-oil, which is one component in the fuel composition, is not limited if it is biomass containing fats or oils or oils obtained from animals, plants, or microorganisms, but preferably insect oil derived from insects can be used. have.

The bio-oil can serve as a lubricant in the molding process to lower the molding pressure, and increase the density while reducing defects in the solidified fuel composition to increase durability and heat generation rate.

The insect oil can be obtained by compression milking after drying and heating the adult insects or larvae of insects, and the insects include Dongae et al., brown mealworm (milworm), longevity beetle, stag beetle, slug, silkworm pupa, white spotted flower Plain or cricket, etc. may be used, and it is preferable to use larvae in Dongae. After drying and heating the larvae on the Dongae used in the process of producing fecal soil to Dongae, etc., it can be used by pressing and milking, thereby securing economic feasibility.

The bio-oil may contain 1 to 30 parts by weight, preferably 5 to 20 parts by weight, and most preferably 10 to 15 parts by weight, based on 100 parts by weight of fecal soil in Dongae and the like.

In addition, wood waste, which is one component in the fuel composition, may be used as sawdust, wood chips, pulp chips, forest by-products, and the like, and is preferably included in the form of pulverized or crushed material to facilitate combustion. The wood waste may include 10 to 50 parts by weight, preferably 20 to 40 parts by weight, most preferably 25 to 35 parts by weight, based on 100 parts by weight of fecal soil in Dongae, etc.

In addition, the peel of tropical fruit, which is one component in the fuel composition, may be peeled of palm, papaya, mango, pineapple, durian, lychee guava, avocado, and the like, preferably coconut peel, papaya peel, or a mixture thereof. have. The palm may use coco palm, date palm, nipa palm, etc., but is not limited thereto. The product standardized by-products of the coco palm fruit (coconut) is also known as cocopeat.

The tropical fruit peel may be used as a by-product of the palm oil extracted from the fruit. The tropical fruit peel is a by-product discarded in the processing process, but most of the components are made of fibers capable of releasing a large amount of heat during combustion, and thus serve to supplement the calorific value of the fuel composition. The tropical fruit peel may be added in a pulverized form, or may be added in the form of carbide or powdered carbide.

The tropical fruit peel may include 20 to 100 parts by weight, preferably 30 to 80 parts by weight, most preferably 40 to 60 parts by weight, based on 100 parts by weight of fecal soil in Dongae and the like.

The bio-oil, wood waste, and tropical fruit peel may be included in a weight ratio of 1: 1 to 5: 2 to 10, preferably 1: 2 to 4: 3 to 8, and most preferably It may be included in a weight ratio of 1: 2 to 3: 4 to 6. When mixed within the above ratio range, it is possible to increase the calorific value while minimizing the generation of soot existing in the peel of the tropical fruit, and it is possible to secure moldability as a fuel.

The fuel composition may be molded to have a predetermined shape, and the molding may be performed by using the fuel composition as it is or by additionally adding a molding binder.

The moisture content is reduced by the heat applied during the molding, and in consideration of thermal efficiency, the moisture content of the fuel composition after molding may be 1 to 15%, preferably 1 to 10%.

During the molding, a molding binder may be used in an amount of 0.5 to 10 parts by weight based on the total weight for strength control, preferably 1 to 5 parts by weight, and may be appropriately selected in consideration of molding strength and combustion efficiency.

The molding binder may be one or more selected from guar gum, polyvinyl alcohol (PVA), and waste molasses, but is not limited thereto.

For the molding, a circular die-type pellet molding machine, a flat die-type pellet molding machine, and other conventional extrusion molding machines that can be used for manufacturing pellets may be used.

The fuel composition may be molded in the form of pellets, chips, or powder.

The fuel composition may be a solid fuel for home use or a solid fuel for a thermal power plant.

In addition, the present invention is a step of producing fecal soil in Dongae and the like to produce fecal soil by treating organic wastes in Dongae and the like;

Drying the fecal soil on the Dongae etc. to prepare the fecal soil on the dried Dongae etc. having a moisture content of 1 to 20%;

Adding bio-oil, wood waste, and tropical fruit peel to the dried dongae etc. to prepare a fecal soil mixture on the dried dongae etc.; And

It provides a method for producing a fecal soil fuel in Dongae, including the step of forming the fecal soil mixture in the Dongae and the like.

The step of producing fecal soil in Dongae et al. may be performed by adding eggs, larvae or mixtures thereof to Dongae et al. to organic waste, and breeding the Dongae et al. to obtain feces soil.

The population of Dongae et al. added to the organic waste may be 100 to 1,000 heads based on 1 kg of organic waste, and breeding of the Dongae et al. may be carried out for 3 to 14 days at a temperature of 30°C to 42°C.

The manufacturing method of the fecal soil fuel in the Dongae et al. may further include the step of separating the Dongae et al. from the fecal soil after the fecal soil manufacturing step.

The step of preparing fecal soil in the dried Dongae etc. may be performed by drying the fecal soil in Dongae etc. at a temperature of 150 to 300°C for 1 to 30 minutes, preferably at a temperature of 150 to 300°C for 1 to 20 minutes It may be performed by drying, more preferably may be performed by drying for 1 to 10 minutes at a temperature of 150 to 300 ℃.

The step of preparing the fecal soil mixture in the Dongae etc. is performed including 1 to 30 parts by weight of bio oil, 1 to 20 parts by weight of wood waste, and 1 to 30 parts by weight of tropical fruit waste based on 100 parts by weight of the dried Dongae etc. I can.

The step of molding the mixture may be performed by using the mixture as it is or by additionally adding a molding binder, as a step of making the fecal soil mixture have a predetermined shape in Dongae and the like.

The fuel composition may be molded in the form of pellets, chips, or powder, and preferably may be molded in the form of pellets.

The moisture content is reduced by the heat applied during the molding, and in consideration of thermal efficiency, the moisture content of the fuel composition after molding may be 1 to 15%, preferably 1 to 10%.

During the molding, 0.5 to 10 parts by weight of the molding binder may be used based on 100 parts by weight of the fecal soil mixture in Dongae, etc. for strength control, preferably 1 to 5 parts by weight, and appropriately considering the molding strength and combustion efficiency. You can choose.

The molding binder may be one or more selected from guar gum, polyvinyl alcohol (PVA), and waste molasses, but is not limited thereto.

For the molding, a circular die-type pellet molding machine, a flat die-type pellet molding machine, and other conventional extrusion molding machines that can be used for manufacturing pellets may be used.

The above description is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention pertains will be able to make various modifications and variations without departing from the essential characteristics of the present invention. Accordingly, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention, but to explain the technical idea, and the scope of the technical idea of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical ideas within the scope equivalent thereto should be construed as being included in the scope of the present invention.

Hereinafter, the present invention will be described in more detail through examples. These examples are only for describing the present invention in more detail, and it will be apparent to those of ordinary skill in the art that the scope of the present invention is not limited by these examples according to the gist of the present invention. .

Production Example 1: Production of larvae to Dongae et al.

Adult worms were added to Dongae and other spawning sites at a density of 8,000 to 12,000 (cm ³ / head). After 3 days have elapsed after the adult insects were added to the Dongae etc. to the spawning site, an attractant medium with a humidity of 20% mixed with food waste and sawdust at a ratio of 3:1 was added to the spawning sites on the Dongae etc., and a 3 to 5 mm hole in the wood. The spawning induction device pierced was put on the inducing medium.

After the egg masses were scattered in the hole of the spawning induction device, the egg mass was collected, and the light condition was maintained at 14L:10D for 4 days, and the larvae were obtained by hatching by protecting the temperature at 27°C and 60% humidity.

Preparation Example 2: Preparation of fecal soil in Dongae, etc.

10 kg of food waste was prepared, and 5000 larvae were added to the Dongae et al. obtained in Preparation Example 1, and the larvae were reared on Dongae et al. for 3 days while maintaining the temperature at 30°C. During breeding, 3 kg of fecal soil was obtained from the excreted Dongae after the larvae ingested and digested food waste on Dongae, etc.

The obtained fecal soil was subjected to a temperature of 43° C., and the larvae of Dongae et al. were made to crawl out of the fecal soil on Dongae et al., which the larvae excreted on Dongae et al., to separate the Dongae et al. from the fecal soil.

The fecal soil from which the Dongae et al. was separated was dried with dry air at a temperature of 250° C. for 5 minutes to obtain fecal soil on the dried Dongae et al. having a moisture content of 11%.

Example: Preparation of fecal soil fuel pellets in Dongae et al.

First, the larvae were dried and heated on Dongae et al., and then oils and oils were prepared on the pressed and milked Dongae et al.

Then, the peel of the coconut was crushed into 100 mesh using a compactor.

100 parts by weight of fecal soil in Dongae, etc., 10 parts by weight of oil and fat in Dongae, 25 parts by weight of wood waste (sawdust), and 50 parts by weight of coconut shell were mixed and put into a flat die-type pellet molding machine. While maintaining the temperature and molding pressure of the molding machine at about 85° C. and about 4,500 kgf/cm ² , pellets having a diameter of about 8 mm and a length of about 30 mm were prepared.

Experimental Example: Measurement of calorific value of fuel pellets

As for the calorific value of the prepared pellet, 0.5 g of a dried sample was placed in a calorimeter (Parr 6 calorimeter), filled with oxygen, and ignited to calculate the calorific value from the temperature change before and after combustion.

As a result, a high calorific value of about 4,200 kcal/kg was confirmed. In addition, it was confirmed with the naked eye that the soot generated during the heating process is significantly reduced compared to the generally commercialized wood pellets.

Claims (4)

Based on 100 parts by weight of fecal soil in Dongae, etc.,
1 to 30 parts by weight of bio-oil, 10 to 50 parts by weight of wood waste, and 20 to 100 parts by weight of tropical fruit peel.
The method of claim 1,
The bio-oil, wood waste, and tropical fruit peel is a fuel composition, characterized in that contained in a weight ratio of 1: 1 to 5: 2 to 10.
The method of claim 1,
The fuel composition, characterized in that the Dongae-deunge fecal soil is obtained by removing the Dongae-deung-e from the product obtained while the Dongae-deung-e treats organic waste.
The method of claim 1,
The bio-oil is an insect oil obtained by compressing and milking adult insects or larvae.