KR100592918B1 - Fuel solid containing charcoal from sewage or food garbage and method producing the same - Google Patents

Abstract

The present invention relates to a carbon charcoal fuel coal including a carbon charcoal of organic waste and a method for manufacturing the same, and more specifically, to waste charcoal and industrial waste charcoal produced by hot air drying and dry carbonization of sewage sludge or food waste. It relates to a charcoal charcoal fuel coal and a method of manufacturing the same.

The charcoal charcoal and production method of the present invention utilizes sewage sludge and food waste as fuel, which brings a dual effect of waste treatment and fuel acquisition.

Sewage sludge, food waste, charcoal, fuel coal, coke, calorific value

Description

Fuel solid containing charcoal from sewage or food garbage and method producing the same}

The present invention relates to a carbon charcoal fuel coal and a method for producing the same, comprising charcoal produced by hot air drying and carbonized carbonization of sewage sludge or food waste and waste powder coke, which is an industrial waste at a predetermined ratio.

As the industry develops, various wastes such as food waste, sewage sludge, agricultural and fishery waste, household waste, manure waste, and construction waste (wood) are generated. Among them, food waste and sewage sludge are high content wastes.

As shown in Sewage Sludge Generation and Disposal in Table 1 and Food Waste Generation and Disposal Status in Table 2, food waste generated 4.1 million tons in 2002 and 1.9 million tons of sewage sludge.

Occurrence Disposal amount Untreated system recycle Landfill incineration Ocean dumping Etc 1,902,410 1,897,016 (99.72%) 118,339 (6.22%) 229,082 (12.04%) 138,440 (7.27%) 1,390,779 (73.1%) 20,376 (1.07%) 5,394 (0.28%)

(Unit: ton)

Generation amount (ton) Disposal amount Remarks system Fodder Composting incineration Landfill Etc 4,173.4 4,173.4 (100%) 1,156 (27.7%) 687.6 (16.5%) 397.1 (9.5%) 1,892.5 (45.4%) 40.2 (1.0%)

(Unit: ton)

Sewage sludge has been banned from direct landfilling since July 2003, and food wastes will be banned from direct incineration and direct landfilling from 2005, so there is an urgent need for alternatives for their disposal.

Sewage sludge has to be dried before incineration at high moisture content, so auxiliary fuel is required.In case of drying by direct heat, odors such as ammonia, H ₂ S, CH ₃ CHO, and CH ₃ SH may occur. . In the case of solidification, a reaction such as hydration, pozzolanic, or carbonization is used using cement, lime, or the like, but the volume is increased by the additive. In the case of landfill, there are problems such as leachate and odor generation, landfill ratio increase, as well as weak landfill with high water content.

To date, food waste treatment methods are composted as food waste disposal methods and used instead of by-products, soil reforming materials, and farmland. In addition, it is used to feed the earthworms, ducks, and mushrooms. In addition, recently, technologies such as methanation and annihilation have been developed, but are not achieving satisfactory results.

Recently, the sewage sludge and food waste treatment methods that are in the spotlight are the carbonization technology of Patent No. 0367127. This allows the hot air dryer to dry sewage sludge with 75-85% water content or food waste into granules with a water content of 20-30% (hot air drying process), and to dry the dried waste in a short time in a vertical multi-layered carbonization. It is a method of recovering charcoal (dry carbonization process) by indirect heating (low temperature below 600 ℃) in a furnace.

The advantage of dry carbonization technology is that it can burn pyrolysis gas discharged from dry carbonization process, and use the heat of combustion in hot air drying process, minimize the use of energy by using volatile gas combustion for carbonization, and recycle waste to charcoal. will be. Unlike pyrolysis incineration, dry carbonization does not generate sparks and indirect heating does not cause soot due to incomplete combustion. In addition, the low drying temperature does not volatilize the salt and incineration leaves charcoal compared to leaving ash. After hot air drying, vinyl, metal, etc. are separated to exclude all conditions under which dioxin is produced.

 However, the carbonized carbonization technology has been required to develop a technology that makes use of the carbonized carbon produced thereby.

In order to solve the above problems, an object of the present invention is to provide a charcoal fuel coal of a certain size and shape by increasing and solidifying the thermal efficiency of the charcoal produced by the dry carbonization technology.

In addition, an object of the present invention is to provide a method for producing the charcoal carbon charcoal.

In order to achieve the above object, the present invention provides a charcoal carbon charcoal comprising 10 to 90% by weight of charcoal and 10 to 90% by weight of waste powder coke.

Preferably, the charcoal charcoal of the present invention is characterized in that it comprises 10 to 60% by weight of charcoal and 40 to 90% by weight of waste powder coke.

The present invention provides a charcoal charcoal, characterized in that the charcoal is obtained by hot air drying and dry distillation carbonization of sewage sludge or food waste.

In the carbonization technology of sewage sludge and food waste, the hot air drying process breaks down the high water content with 75 ~ 85% water content into 5 ~ 15mm size, and then uses 20 ~ 30 to burn the pyrolysis gas obtained in the carbonization process. Allow to dry for about a minute. At this time, the temperature is maintained for about 10 minutes in the vicinity of 100 ℃, it is to be raised to 400 ℃ for the remaining time.

Next, in the carbonization process, indirect heating passes through a vertical multi-stage layer to separate dry gas and carbides. Dry gas is burned and used in the dry carbonization process. Drying carbonization reaction is represented by the following formula.

C _n H _n (organic) → xCH ₄ + yH ₂ + C (charcoal)

In one embodiment, the present invention provides a charcoal charcoal comprising a clay, wheat flour, industrial grass, or agar as a binder. Clay, wheat flour, industrial grass or agar is for solidifying charcoal coal. It is preferable to use the clay, the wheat flour paste, the industrial paste and the agar diluted with water at a concentration of 10% or less.

The present invention in another embodiment, 10 to 60% by weight of charcoal, 40 to 90% by weight of the waste powder coke mixed clay powder 2 to 10% by weight of the mixed powder, then kneaded with water It provides a method for producing charcoal carbon charcoal comprising the step and the step of molding and pressing the dough into a predetermined shape.

In this case, in addition to clay powder, industrial grass, wheat flour or agar diluted in water at a concentration of 10% or less may be used as a binder.

Through the following examples will be described the present invention. However, the present invention is not limited to the following examples.

Example

The charcoal and waste powder coke obtained by treating the sewage sludge with dry carbonization technology were mixed as shown in the following table. Waste powder coke is a waste coke discharged from steel mills, etc., the particle size of 1000㎛ or less was used.

Example Mixing ratio (% by weight) Sewage sludge carbonized charcoal Waste Powder Coke One 0 100 2 10 90 3 20 80 4 30 70 5 40 60 6 50 50 7 60 40 8 70 30 9 80 20 10 90 10 11 100 0

Next, the powdered clay was mixed with 7% by weight of the carbonized charcoal and the waste powder coke mixed powder, and then kneaded with an industrial paste having a concentration of 5% diluted with water. The dough was poured into a mold for molding, and pressure was produced to produce charcoal charcoal.

The produced charcoal fuel coal was burned to measure the calorific value and the ash ratio. The results are shown in the table below. The ash ratio is the weight ratio before and after combustion of the charcoal fuel coal.

Example Calorific Value (kcal / kg) Ash ratio (%) One 8,540 1.7 2 8.087 6.1 3 7,547 7.2 4 7,035 12.3 5 6,557 12.8 6 6,018 22.3 7 5,535 25.2 8 4,993 29.2 9 4,487 35.4 10 3,985 40.2 11 3,470 42.1

From the table, the calorific value of the charcoal itself was 3,470 kW / kg, and the calorific value of the waste powder coke was 8,540 kW / kg. In the case where the charcoal and the waste powder coke were mixed, the calorific value was measured from a minimum of 3,985 kPa / kg to a maximum of 8,087 kPa / kg depending on the mixing ratio.

The calorific value available as alternative fuel is 4,400 kW / kg (based on briquettes), and the calorific value that can be used as solid fuel is 3,500 kW / kg or more, but the government-certified quality standard (GR) indicates that the calorific value is 5,000 kW / kg or more. The ash ratio is less than 30%.

Accordingly, it is Examples 2 to 10 that show a calorific value of 3,500 kW / kg or more that can be used as a solid fuel, which is a case where 10 to 90% by weight of carbonized carbon and 10 to 90% by weight of waste powder coke are mixed.

In addition, as a quality standard fuel, the calorific value of 5,000 kW / kg or more and less than 30% of the ash ratio are in accordance with the above Examples 2 to 7, in which 10 to 60% by weight of carbonized carbon and 40 to 90% by weight of waste powder coke are mixed. It can be seen that.

According to the carbonized charcoal fuel coal of the present invention and its manufacturing method, the carbonized charcoal produced by the dry carbonization technology of organic waste can be efficiently utilized.

The charcoal charcoal of the present invention and its manufacturing method have a dual effect of treating organic waste such as sewage sludge or food waste and obtaining fuel.

Claims (6)

Charcoal carbon charcoal comprising 10 to 90% by weight of charcoal and 10 to 90% by weight of waste powder coke. The charcoal charcoal, characterized in that it comprises 10 to 60% by weight of charcoal and 40 to 90% by weight of waste powder coke. According to claim 1, The charcoal charcoal charcoal, characterized in that obtained by hot air drying and dry carbonization of sewage sludge or food waste, agricultural and fishery waste, household waste, manure waste, construction waste (wood). [Claim 2] The charcoal and waste powder coke according to claim 1, wherein any one binder selected from clay, wheat flour paste, industrial paste or agar is added in an amount of 2 to 10% by weight of the charcoal and waste powder coke. Charcoal fuel coal. 10 to 60% by weight of charcoal, 40 to 90% by weight of waste powder coke, mixed with a powder clay 2 to 10% by weight of the mixed powder, and then kneading with water, the kneading step to kneading in a constant shape Charcoal charcoal fuel coal production method comprising the step of pressing and molding. The method of claim 5, wherein the kneading charcoal fuel coal production method characterized in that the industrial paste, wheat flour paste or agar of 10% concentration or less is added in the kneading step.