KR100481284B1 - Combustible material using low quality coal, garbage and sewage sludge - Google Patents

Abstract

The present invention relates to a combustion body using low coal and food waste and sewage sludge.

In the present invention, the combustion body composed of food waste and low-carbon coal is 3 to 5% by weight of heavy clay, 5 to 7% by weight of silica, 10 to 20% by weight of talc, 6 to 8% of ferric oxide, per 5 to 7 kg of low-carbon coal of 30 to 50 mesh. A combustion body of 35 to 45% by volume, by weight of 2% to 4% by weight of sulfur and 12% to 26% by weight of diatomaceous earth, into a mixture of 120 to 200 mesh; A mixture of 45-55% by volume of food waste and a mixture of 55-65% by volume of organic waste mixed with 45-55% by volume of sludge can be used to burn food waste and sludge together with the combustion of low-carbon coal.

Description

Combustor using low coal and food waste and sewage sludge {.}

The present invention relates to a combustor for treating organic wastes, and specifically, to treat food wastes, in cooperation with a ignition medium based on low carbons, for recycling the low-carbon coals recognized as industrial wastes together with food wastes. The present invention relates to combustion coal using low coal and food waste and sewage sludge.

In particular, the present invention is to mix the low-temperature hot coal and food waste pulverized with low coal as a raw material so that the food waste is combusted by the thermal power of the high-temperature coal so that it can be treated simultaneously with the low coal and food waste causing environmental pollution This provides usability that can be used as a commercial and industrial fuel.

Low coal is coal that contains anthracite coal, graphite coal, and other similar minerals, and has a low calorific value of about 3,500 kcal / kg, which is difficult to maintain the combustion temperature, and has a low thermal power so that the combustion state is maintained continuously. It can't be fueled by itself because it is turned off.

Therefore, low-carbon coal is low in calorie and is added in small amounts during the production of briquettes, but it is most often treated as waste because it causes the generation of unburned components such as carbon monoxide and sulfuric acid gas.

Many studies have been conducted on fuels that can increase thermal power by adding thermal additives to increase the value of low-carbon coal. Among the representative methods, Korean Patent Application Nos. 81-354, 87-60, 81-4583 and the like have been proposed. However, these methods cannot be completely burned because they are impossible to burn at high temperatures, and they are not economical because a large amount of additives are formulated in the manufacturing process.

Most of the fuels that have been known so far using low-carbon coal have been mixed with low-carbon anthracite coal with various types of plant carbide, various kinds of oxidizing agents and auxiliaries, or combustion accelerators such as potassium nitrate, strontium nitrate, potassium chlorate, manganese, and sodium sulfate. To manufacture.

Most of these solid fuels are designed to be burned by a simple action such as an oxidizing agent or a combustion accelerator. These methods produce higher heat and higher calories than low anthracite coal, but the combustion time is relatively short and harmful gas is generated, thus extending the combustion time. In order to improve the blending ratio of low anthracite coal to at least 3,500 kcal / kg heavy anthracite coal, it does not meet the original purpose of providing high quality fuel using low anthracite coal. In addition, the powdered and mixed metal oxidizers can obtain the complex combustion effect of low carbon with low carbon content due to the chemical catalysis of the oxidant, but the proportion of the metal oxidants in the process of manufacturing the metal oxidant and fuel production using the low carbon This was not easy to adjust the productivity, the productivity was lowered, causing a rise in production costs.

In order to solve the above problems and to utilize the low quality coal usefully, Korean Patent Application No. 10-2001-74103 filed by the applicant of the present invention is known as 'low pollution high temperature coal using low carbon and a manufacturing method thereof'. . The hot coal provides useful information to obtain a high-calorie fuel without pollution using low-carbon coal.

On the other hand, food waste has a large amount of sludge emitted in the form of sludge from home kitchens, restaurants, or large sewage treatment plants, due to the development of consumer culture, food service, and dietary life. Came to.

In particular, sludge from sewage treatment plants contains various pollutants and chemicals, so they are very toxic and should not be disposed of naturally because they cause serious environmental pollution when they are landfilled or disposed of at sea.

Therefore, since food waste and sludge in sewage treatment plants cannot be left unattended in terms of environmental preservation, a new social problem has been called for to treat these wastes effectively. Along with the plan, there are various ways to treat and recycle food waste.

Most of the known methods of treating or recycling food waste are incinerated, feed, and composted directly in separate incinerators by pressing, dehydrating, crushing, cutting and drying the collected food waste. Treatment facilities or methods that rely on eggplant methods have been proposed.

This conventional technology is disclosed in the Republic of Korea Patent Publication No. 2002-0015759 'sewage wastewater sludge and solid fuel manufacturing method using combustible waste and food waste drying', 2002-0023357 'apparatus and method for producing heating fuel using food waste' It is.

In the former case, sludge: food waste and dry matter: flammable waste powder (tire, vinyl and synthetic resins) in a ratio of 50: 30: 20 is used as an industrial or heating fuel. In this case, a device for producing fuel by mixing coal, charcoal powder, starch and oil in dehydrated food waste is described.

Other documents similar to the above have similar parts in terms of mixing combustible waste powders or coal powders for use as fuels.

The direct incineration method is a combustible waste powder that is mixed with the food waste generates a number of harmful gases, including dioxin as the combustion, there is a problem that causes another environmental pollution instead of treating the food waste.

The method of manufacturing feed using food waste has to select and remove foreign substances and salts more specifically in order to suppress the growth of harmful microorganisms and to prevent the deterioration of feed, and there is a difficulty in the process requiring a packaging facility. . Also, above all, it is never desirable to feed or fertilize without removing heavy metals and other harmful substances contained in the food waste, and it is not preferable because it causes secondary pollution, and the cost of feeding and fertilizing food waste is higher than the cost of landfilling. Rises significantly.

In the present invention, in treating sludge collected from food waste or sewage treatment plant by combustion incineration method, food waste or sludge is not used by using waste such as low-quality coal without using high-carbon coal which is effective as fuel such as coal charcoal. It is to provide a combustion body that can process.

Thus, the present invention is that the low-carbon coal has not been effectively fueled until now, the low-carbon coal does not burn by itself, and only the carbon component of the low-carbon coal is burned by burning the thermal additives mixed with the low-carbon coal, and other components are not burned, thereby generating harmful gases. Note that it is not produced by mixing high-carbon coal with low-carbon low-carbon coal, nor by mixing high-carbon coal with food waste, and by directly mixing food waste with low-carbon coal. It is intended to provide a combustible combustible using food waste and low carbon by including an additive composition that can be fired at low cost.

That is, the present invention mixes the additive composition of the liquid state consisting of heavy soil, silica, ferric oxide, sulfur, diatomaceous earth, talc with low-carbon coal to produce a fuel that exhibits low-polluting high calorie value while burning low-carbon coal, food waste By mixing the sludge collected in the sewage treatment plant with an appropriate ratio, it is possible to burn food waste and sludge with the combustion of low-carbon coal.

Therefore, those of ordinary skill in the art will appreciate the usefulness of the present invention while considering the specification and claims.

delete

Combustion body composed of food waste and low-carbon coal to achieve the intended purpose of the present invention is 3 to 5% by weight of heavy sodium, 5 to 7% by weight of silica, 10 to 20% by weight talc per 5 to 7kg of low-carbon coal of 30 to 50 mesh 35 to 45% by volume of a combustion body comprising 6% to 8% by weight of ferric oxide, 2 to 4% by weight of sulfur, and 12 to 26% by weight of diatomaceous earth; 45 to 55% by volume of food waste and 45 to 55% by volume of organic waste mixture of 55% by volume of sludge mixed. 3 to 5% by weight of heavy soils, 4 to 7% by weight of silica, 10 to 20% by weight of talc, 6 to 8% by weight of ferric oxide, Powdered combustion body having a weight of 2 to 4% by weight of sulfur and 12 to 26% by weight of diatomaceous earth; 45 to 55% by volume of food waste and 45 to 55% of the total volume An organic waste mixture comprising a volume% of sewage sludge; wherein the ratio of the total volume of the combustion body and the organic waste mixture is 35 to 45% by volume of the combustion body and 55 to 65% by volume of the organic waste mixture. Characterized in that it is proportional to the weight of the low coal in the above. In terms of the actual weight of the combustion mixture mixed in the proportion of phosphorus, according to the above weight percentage, 5% by weight, the lower limit of low coal, 1.5% by weight of heavy earth and 0.2% by weight of silica , Talc is 0.5% by weight, ferric oxide is 0.3% by weight, sulfur is 0.1% by weight, diatomaceous earth is 0.6% by weight, and the upper limit of the combustion mixture is 0.35% by weight of heavy crude soil at 7% by weight, the upper limit of low carbon. %, Silica is 0.49% by weight, talc is 1.4% by weight, ferric oxide is 0.56% by weight, sulfur is 0.28% by weight, diatomaceous earth is 1.82% by weight is mixed in the present invention. Composed of about 8.22 ~ 11.9kg of combustor by mixing 3.2 ~ 4.9kg of low and high sum of heavy soil, silica, talc, ferric oxide, sulfur, and diatomaceous earth as the weight ratio. And a volume as a mixture mixed in the combustion body. Preparing an organic waste mixture of 45 to 55% by volume of food waste and 45 to 55% by volume of sewage sludge; based on the ratio of the total volume of the combustor and the organic waste to be mixed. The mixture is completed by mixing 35 to 45% by volume of the combustion body and 55 to 65% by volume of the organic waste mixture. The additive is provided in a powder state or a liquid state.

The additive in the form of powder is proportional to the weight of low coal 5-7 kg, 3-5% by weight of solid heavy sodium, 4-7% by weight of silica, 10-20% by weight of talc, 6-8% by weight of ferric oxide, It is obtained by grinding in a grinder so that the particle size of 2-4 wt% of sulfur and 12-26 wt% of diatomaceous earth is 120-200 mesh.

The additive composition, which is a liquid mixture, can be frozen in the powdered combustor composition in a freezing chamber in the range of -40 to -70 for 60 to 120 minutes, and heated at a temperature of 1000 to 30 ° C for 30 to 40 minutes to boil at 100 ° C. 45 to 55 g of the additive composition is mixed with water, followed by further heating for 5 to 10 minutes, followed by cooling and water purification. The additive in the liquid state is 0.23 to 0.27CC in the mixture of low carbon and food waste and sludge. Are mixed.

The additive mixed in the low-carbon coal to enable low-polluting high-temperature coal of the present invention is a high temperature during combustion by the pressurization of hydrogen and oxygen that the components are rapidly conducted along the moisture in the coal and burned according to the chemical action of the components and additives in the coal. Generation, thereby enabling complete combustion, thereby significantly reducing the generation of noxious gases.

In the above additives, heavy earth is collected from the beach, and due to the chemical properties of the earth mixed with the salt of seawater, the harmful gases are generated during combustion due to the chemical properties of the carbon. When it maintains, it acts to supply oxygen rapidly.

Quartzite acts as an accelerator to induce the explosion of oxygen and hydrogen at the required temperature.

Talc acts to pressurize oxygen and hydrogen using explosiveness when the required temperature is applied by the action of magnesium, the main component.

Ferric oxide acts to promote combustion by chemically reacting and providing oxygen in the process of being mixed with low-carbon coal and burning, and sulfur is mixed with low-carbon charcoal to raise the flame and keep it burning continuously.

Diatomaceous earth has an inducing action to promote each component of the additive.

In the present invention, food waste and sludge are mixed with low-carbon coal, which is significantly improved in ignition by additives, and is used as fuel for industrial and heating, thereby simultaneously treating organic waste by low-carbon coal remaining as waste and food that is an environmental pollution source. Resources can be recycled.

Ash generated by combustion and incineration does not pollute the soil even when directly buried because the toxicity is removed by combustion.

Hereinafter, embodiments of the present invention will be described in detail.

Low quality coal was used as a mine by-product, and the calorific value of the coal that can be fueled by the present invention was used as a sample that is 2,800 ~ 3,500Kcal / kg.

The additive is made into a powder or liquid as intended and mixed in the low coal.

delete

The preferred mixing ratio of the powdered composition with the prepared water is that 1,800 ~ 2,200cc of water includes 45-55g of the powdered composition, and more preferably, 2,000g of water contains 50g of the powdered composition.

In the following example, a state in which an additive is mixed with low coal is referred to as hot coal.

Hot coal production method is to pulverize low-carbon coal to 30-50 mesh using a pulverizer, and then add a liquid additive to the low-carbon coal 5-7Kg, mix it with a mixer, produce as a coal or powdered coal, and more preferably quantified The composition is 0.25kg of liquid additives mixed with 6kg of low coal.

The low coal has a particle state of 30-50 mesh, the additive has a particle of 120-200 mesh, and the low coal and the additive are mixed while the temperature in the mixer maintains 30-40 ° C.

The temperature in the mixer acts as a very important factor in which the chemical properties are conducted when the components of the additive composition of the present invention are mixed with low carbon, and when mixed within the range of 30 to 40 ℃, more preferably at 35 ℃ The chemical reaction is maximized when mixed.

Molding conditions for molding in the form of a fuel usable using the composition of the present invention, molding at a pressure of 3,000 ~ 4,000kg / ㎠ is suitable for the combustion rate, duration and formability. In other words, if the molding pressure is less than 3,000 kg / ㎠ the density between the particles decreases the porosity is relatively high, the finished molded fuel is easily damaged during transfer, the combustion proceeds too fast, the combustion time is shortened, and also has a disadvantage of 4,000 Compression of more than kg / ㎠ the density between the particles is dense, the porosity is too low, the combustion is not easy and the combustion time is delayed to increase the generation of incomplete combustion components.

In order to compare the combustion efficiency of high-temperature coal and general briquettes, the test time, combustion time, maximum temperature average temperature and combustion time of the hot coal sample prepared in the range of the composition ratio and the sample collected from KS briquettes at room temperature The test analysis results are shown in Table 1 below.

In Table 1, the hot coal constituting the present invention was named as a test sample, and the sample by KS was named as a comparative sample.

Comparative Sample 1 Test Sample 1 Comparative Sample 2 Test Sample 2 Comparative Sample 3 Test Sample 3 Exam time 11.22 11.40 9.65 12.70 11.40 11.53 Burning time 8.22 7.73 6.17 9.53 8.23 8.23 Temperature (℃) 580 505 620 590 610 570 Average temperature (℃) 474 471 533 508 485 494

The combustion time corresponding to the Korean Industrial Standards was 6.17 to 9.53 hours. The combustion time in the table was 7.54 hours for the comparative sample, 8.54 hours for the test sample, and the test sample was observed for about 1 hour longer. The reason is that the mass of the comparative sample is 3.5kg in the analysis of physical and chemical composition of the sample for testing, and the mass of the test sample is 5.0kg, and there is a difference in mass. You can hear things that have a big impact.

For the test samples with large briquette mass, the combustion duration time according to air and succession coefficients was longer than that of the comparative sample. This means that even the low calorie value is improved by the mass reinforcement corresponding to the low calorific value, thereby improving the product value of the low grade fuel.

Looking at the maximum temperature and the average temperature of the combustion exit temperature of the sample, the maximum temperature for each sample has a temperature difference of 40 ℃ in both the comparison sample is 603 ℃, the test sample is 561 ℃. Moreover, in average temperature, there is almost no difference near 497 degreeC, respectively. In the combustion process, the specific gas composition at the highest temperature is 8 to 10% for O ₂ and CO ₂ to Incomplete combustion was confirmed when the air and succession coefficients were in the range of 1.6 to 2.0 and the coefficient was 1.6 or less.

In addition, the condition of an air overstrain of 2.4 or more is disadvantageous due to an increase in the amount of inlet air, a decrease in combustion chamber temperature, and a large heat loss due to ash and gas.

There is no correlation between the highest and average temperatures in the table. However, the combustion temperature is changed by the amount of combustion air, and as the overcoefficient increases, the combustion temperature decreases. At this time, even if the same sample is different from the inflow air amount due to the weather conditions, the combustion temperature range of the weather changes of the day, even if there is a difference in the combustion time is natural.

The test can be used to fully confirm the chemical properties of both samples, greatly evaluating their availability as fuel.

As a result of the above test, the combustion time of the test sample used as the sample of the present invention is guaranteed at least 6 hours, and the combustion chamber outlet temperature at that time may be 550 ° C or more. In this way, although the calorific value of the test sample was low quality coal of 3,000 kcal / kg, it was confirmed that there was no problem in the combustibility and that it could be used as fuel.

The generated concentrations of SO ₂ and CO ₂ are shown in Tables 2 and 3, respectively.

First, the generation concentration of SO ₂ is shown in Table 2.

SO ₂ generation (ppm). Comparative Sample 1 Test Sample 1 Comparative Sample 2 Test Sample 2 Comparative Sample 3 Test Sample 3 Average value at end of peak 405150283 200200162 570420433 190155146 485250311 255200212 Average value X burning time 2.326 1.252 2.672 1.391 2.560 1.766

In Table 2, the amount of SO ₂ generated in the comparative sample is higher than that in the test sample, and when the average value X combustion time is used as the comparison index, the comparative sample is 2,519, the test sample is 1,420, and the ratio is 1.77 times.

The amount of SO ₂ generated in the comparative sample was divided into 3 times the combustion time, so that the first 1/3 section gradually increased to SO ₂ , and the next 2/3 sections maintained the maximum generation rate, and the last 3 / Section 3 tends to decrease slowly.

In the case of the test sample, the amount gradually increased in the third section, but continued to the end at the maximum state.

The number of excess air machines and the CO ₂ generation concentration of each fuel machine is shown in Table 3.

CO ₂ generation (ppm). Fuel stand Automatic feeder Mobile Pulverized coal burner Oil burner result mCO ₂ 1.5 ~ 2.08 ~ 10 1.4 ~ 1.710 ~ 12 1.3 ~ 1.510 ~ 14 1.2 ~ 1.411 ~ 15 1.2 ~ 1.411 ~ 14 1.6-2.87-12

These results indicate that the number of excess air machines in this test is excessive, but the fuel actually used will control the air for combustion by adjusting the stopper.

Theory if the carbon in the fuel to air can completely burn all of the oxygen in the air ratio of the CO ₂ in the byeonhaeseo combustion gas to CO ₂ is maximized. The measurement of CO ₂ in this test is to be taken as a reference by the gas detector. Since the CO ₂ concentration at the time of stable combustion is constant in actual combustion, efficient combustion will be measured by detecting this concentration of CO ₂ .

In addition, when the sample was in a steady state, there was no generation of CO. When the sample was stuck, the lid was covered, and when the combustion state suddenly changed, 2 to 6% of CO was detected. In addition, 0.2 to 0.4% was generated due to a decrease in image temperature (below 600 to 650 ° C) when the unburned component was lost at the end of the combustion and the optimum combustion was reached.

Table 4 shows the temperature characteristics in the combustion process.

Temperature characteristics in the combustion process. Comparative Sample 1 Test Sample 1 Comparative Sample 2 Test Sample 2 Comparative Sample 3 Test Sample 3 Maximum temperature (℃) from ignition to test start 705 670 740 630 740 690 Maximum temperature after test start (℃) 570 500 580 590 610 570 Average combustion temperature during the test (℃) 474 461 533 508 485 494 Test burning time 8.22 7.73 6.17 9.53 8.23 8.33

As shown in Table 4, the ranges of the same samples are not related to the combustion temperature among the heterogeneous comparative samples and test samples, and it is apparent that the combustion temperature is different according to the weather conditions of the test day.

The average values of the comparative and test samples are shown in Table 5.

Average temperature (℃) from ignition to test start Maximum temperature after test start (℃) Average combustion temperature during the test (℃) Combustion temperature at test (℃) Comparative Sample 728 587 497 7.72 Test Sample 685 560 493 8.54

It is obvious that low carbon can be used as a preferred fuel by the additive according to the test results.

Therefore, the low-carbon coal by the additive has the ability to burn by itself, and if the food waste is properly mixed during the manufacturing process of the low-carbon coal will be able to easily handle the food waste together with the low-carbon coal.

The food waste mixed with the hot coal may be collected at home, a restaurant, a food service center, and the food waste may be collected in a sludge form at a sewage treatment plant through domestic sewage.

These organic wastes are collected and then separated and pulverized, and then dried in a state containing appropriate moisture, mixed with the hot coal, and manufactured in the form of pulverized coal or solid fuel. The appropriate amount of water is applied differently depending on the case in which the combustion body of the present invention is molded into pulverized coal or solid fuel.

That is, in order to manufacture the pulverized coal, the organic waste should be completely dried. In the case of forming the solid fuel, it is preferable to include more water when preparing the pulverized coal in consideration of formability that may be bonded between particles.

In addition, considering that the present invention is provided as a combustion body, foreign matter screening can be easily performed, and efforts to remove salt or other harmful components are reduced.

The mixing of food waste and sludge is in the range of 45 to 55% by volume of food waste in the ratio of the total volume mixed, and the sludge is mixed in the range of 45 to 55% by volume, more preferably in the range of 1: 1. .

The mixing ratio of the food waste and the sludge is not determined by the technical problem, but considering the balanced treatment of the organic waste.

In the mixture of the organic waste and hot coal, 55 to 65% by volume of organic waste and 35 to 45% by volume of hot coal are mixed in the ratio of the total volume mixed. In other words, the organic waste and hot coal are mixed at a ratio of 60:40. When the organic waste is 70 vol% or more, the combustion time is reduced while the content of the hot coal decreases, and the calorific value depends on the combustion of the organic waste. Is lowered.

Therefore, the organic waste and hot coal may be mixed in the range of about 70:30 if the combustion body of the present invention is manufactured for the purpose of direct incineration without treatment as a fuel.

On the other hand, when the content of the organic waste is 55 vol% or less, the calorific value and the duration of combustion continue to be long, making it suitable as a fuel for heating. However, the consumption of low-carbon coal is high while the throughput of the organic waste is relatively reduced.

In order to test the combustion efficiency of the combustion body in which the organic waste is mixed with the hot coal, the optimum component ratio for forming the hot coal is extracted, and the mixed amount of the organic waste is mixed with each other to obtain the following test sample.

Test Sample 4.

Prepare 6 kg of 40 mesh low coal, wherein 19% by weight of diatomaceous earth, 4% by weight of diatomite, 5.5% by weight of silica, 15% by weight of talc, 7% by weight of ferric oxide, and 3% by weight of sulfur are 160 meshes. A test sample 4 was prepared by preparing 70 vol% of hot coal mixed with the low-carbon coal by pulverizing and mixing the mixed additives in powder form, and mixing 30 vol% of a mixture of food waste and sludge.

Test Sample 5.

Prepare 6 kg of 40 mesh low coal, wherein 19% by weight of diatomaceous earth, 4% by weight of diatomite, 5.5% by weight of silica, 15% by weight of talc, 7% by weight of ferric oxide, and 3% by weight of sulfur are 160 meshes. 40 vol% of hot coal was prepared by mixing the mixed additives with pulverized powder in the form of powder, and 60 vol% of a mixture of food waste and sludge was mixed thereto to prepare Test Sample 5.

Test Sample 6.

Prepare 6 kg of 40 mesh low coal, wherein 19% by weight of diatomaceous earth, 4% by weight of diatomite, 5.5% by weight of silica, 15% by weight of talc, 7% by weight of ferric oxide, and 3% by weight of sulfur are 160 meshes. A test sample 6 was prepared by preparing 30 vol.% Of hot coal, which is mixed with the low-carbon coal, by pulverizing and mixing the mixed additives into powder. Further, 70 vol.% Of a mixture of food waste and sludge was mixed.

Test results for the test samples 4 to 6 in which organic waste is mixed with the test samples 1 to 3 in contrast to the results for the test samples 1 to 3 showing the test results of the pure hot coal (Tables 1 to 5). Is shown in Comparative Table 1 to Comparative Table 5 below.

That is, test sample 1 and test sample 4, test sample 2 and test sample 5, test sample 3 and test sample 6 are compared with each other.

Test Sample 1 Test Sample 4 Test Sample 2 Test Sample 5 Test Sample 3 Test Sample 6 Exam time 11.40 10.52 12.70 11.63 11.53 10.42 Burning time 7.73 6.75 9.53 8.64 8.23 7.35 Temperature (℃) 505 508 590 595 570 577 Average temperature (℃) 471 473 508 512 494 501

As shown in Table 6, the combustion time between the samples having a similar composition ratio is shorter than the sample composed of pure hot coal, and the sample containing the organic waste is shorter, which causes the hot coal component to delay combustion and is properly dried. This is because organic waste burns rapidly.

Even at the highest and average temperatures, the sample containing organic wastes showed a slightly higher difference than the pure hot coal.

The test can be used to fully confirm the chemical properties of both samples, greatly evaluating their availability as fuel.

As a result of the above test, the combustion time of the test sample used as the sample of the present invention is guaranteed at least 6 hours, and the combustion chamber outlet temperature at that time may be 550 ° C or more. As described above, it was confirmed that the calorific value of the main material was 3,000 kcal / kg of low-carbon coal, but there was no problem in combustibility in a state in which an appropriately dried organic waste was mixed and could be used as fuel.

The generated concentrations of SO ₂ and CO ₂ are shown in Tables 2 and 3, respectively.

First, the generation concentration of SO ₂ is shown in Table 7.

SO ₂ generation (ppm). Test Sample 1 Test Sample 4 Test Sample 2 Test Sample 5 Test Sample 3 Test Sample 5 Average value at end of peak 200200162 180150135 190155146 179132109 255200212 235185189

As shown in Table 7, the amount of SO ₂ generated in the sample containing the organic waste is lower than that of the pure hot coal sample, which is due to the fact that complete combustion is possible as the calorific value of the sample in which the organic waste is mixed increases. will be.

Test samples 1 to 3 gradually increased the amount of SO ₂ generated in the third section, and then continued to decrease until completion.

The number of excess air machines and the CO ₂ generation concentration of each fuel machine are shown in Table 8.

CO ₂ generation (ppm). Fuel stand Automatic feeder Mobile Pulverized coal burner Oil burner result mCO ₂ 1.5 ~ 2.07 ~ 9 1.4 ~ 1.79 ~ 11 1.3-1.59-13 1.2 ~ 1.410 ~ 14 1.2 ~ 1.410 ~ 13 1.6-2.86-11

Theory if the carbon in the fuel to air can completely burn all of the oxygen in the air ratio of the CO ₂ in the byeonhaeseo combustion gas to CO ₂ is maximized. The measurement of CO ₂ in this test is by gas detector and is a reference.

Since the CO ₂ concentration at the time of stable combustion is constant at the time of actual combustion, efficient combustion can be measured by detecting this concentration of CO ₂ .

In addition, when the sample was in a steady state, no CO was generated, and 1.5 to 5% of CO was detected when the sample was stuck and the air supply was unstable. In addition, incomplete combustion component disappeared at the end of combustion, and when the optimum combustion was reached, 0152 to 0.35% was generated due to the decrease in image temperature (below 600 to 650 ° C).

Table 9 shows the temperature characteristics in the combustion process.

Temperature characteristics in the combustion process. Test Sample 1 Test Sample 4 Test Sample 2 Test Sample 5 Test Sample 3 Test Sample 6 Maximum temperature (℃) from ignition to test start 670 673 630 685 690 693 Maximum temperature after test start (℃) 500 506 590 595 570 577 Average combustion temperature during the test (℃) 461 465 508 613 494 596 Test burning time 7.73 7.61 9.53 9.73 8.33 8.52

Temperature characteristics in the combustion process will vary depending on the weather conditions of the test day.

The average values of the comparative sample and test sample are shown in Comparative Table 5.

Average temperature (℃) from ignition to test start Maximum temperature after test start (℃) Average combustion temperature during the test (℃) Combustion temperature at test (℃) Test Sample 1-3 685 560 493 8.54 Test Sample 4 ~ 5 688 564 495 8.93

According to the test results, it is obvious that the fuel can be used as an effective fuel even in the state where organic waste is mixed by Goan coal in which additives are mixed in low carbon.

Therefore, the low coal by the additive has the ability to burn by itself, and if the food waste is properly mixed during the manufacturing process of the hot coal, the food waste together with the low coal will be easily disposed of.

Test Samples 7,8, and 9 were prepared by mixing the remaining components in the same composition, except that 0.25cc of the powdered additive was mixed in the liquid state in the test samples 4, 5, and 6.

Here, the liquid additive is freeze-freezing the powdered composition in the test sample for 9 minutes in a freezer at -55 ° C., heated for 30 minutes at a high temperature of 1000 ° C. or higher, and heated to 2,000 ° C. in boiling water at 100 ° C., 50 g of the additive composition. The mixture was further heated for 8 minutes, cooled and purified to prepare 0.25CC.

Test Sample 7.

Prepare 6 kg of 40 mesh low coal, wherein 19% by weight of diatomaceous earth, 4% by weight of diatomite, 5.5% by weight of silica, 15% by weight of talc, 7% by weight of ferric oxide, and 3% by weight of sulfur are 160 meshes. 70 vol% of hot coal was prepared by pulverizing and mixing the additive in the liquid state to the low coal, and 30 vol% of a mixture of food waste and sludge was mixed thereto to prepare a test sample 7.

Test Sample 8.

Prepare 6 kg of 40 mesh low coal, wherein 19% by weight of diatomaceous earth, 4% by weight of diatomite, 5.5% by weight of silica, 15% by weight of talc, 7% by weight of ferric oxide, and 3% by weight of sulfur are 160 meshes. 40 vol% of hot coal was prepared by pulverizing and mixing the liquid additive with the low coal, and 60 vol% of a mixture of food waste and sludge was mixed thereto to prepare Test Sample 8.

Test Sample 9.

Prepare 6 kg of 40 mesh low coal, wherein 19% by weight of diatomaceous earth, 4% by weight of diatomite, 5.5% by weight of silica, 15% by weight of talc, 7% by weight of ferric oxide, and 3% by weight of sulfur are 160 meshes. 30 vol% of hot coal was prepared by pulverizing and mixing the additive in the liquid state into the low coal, and 70 vol% of a mixture of food waste and sludge was mixed thereto to prepare a test sample 9.

In order to compare the characteristics of the additives in the powder state and the additives in the liquid state in Test Samples 4 to 6 and Test Samples 7 to 9, samples having similar compositions were compared. Specifically, the test result of the test sample 7 is compared with the test sample 4, the test sample 8 is compared with the test sample 5, and the test sample 9 is compared with the test sample 6, the result of the above table and the error of about 2 to 3% There is a range, but the difference is very small, and the difference in properties between the additive and the liquid state is similar.

The present invention enables the low-carbon coal to burn itself by using a small amount of additives in the low-carbon coal generated from the coal mine and recognized as waste. Since it is possible to completely burn at a high temperature than any other, it is possible to suppress the generation of harmful gases to provide a combustion body that can minimize the impact on the environment.

Claims (2)

3 to 5% by weight heavy crude earth, 4 to 7% by weight of silica, 10 to 20% by weight of talc, 6 to 8% by weight, based on the weight of 5 to 7kg of low-carbon coal of 30 to 50 mesh A powdered combustor having a mixed weight of ferric oxide, sulfur corresponding to 2 to 4% by weight, and diatomaceous earth corresponding to 12 to 26% by weight;  Volume ratio is composed of organic waste mixture of 45 to 55% by volume of food waste and 45 to 55% by volume of sewage sludge. Combustion using low-carbon coal and food waste and sewage sludge, characterized in that the ratio of the total volume of the combustion body and the organic waste mixture is a mixture of 35 to 45% by volume of the combustion body and 55 to 65% by volume of the organic waste mixture. sieve. According to claim 1, 3 to 5% by weight of heavy soil, 4 to 7% by weight of silica, 10 to 20% by weight of talc relative to the weight of 5 to 7kg of low-carbon coal of 30 to 50 mesh Powder composition of -40 to -70 having a mixed weight of ferric oxide corresponding to 6 to 8% by weight, sulfur corresponding to 2 to 4% by weight, and diatomaceous earth to 12 to 26% by weight. Freeze frozen in 60-120 minutes in the freezer of the range, and heated for 30 to 40 minutes at a high temperature of 1000 ℃ or more mixed with 45 ~ 55g of the additive composition in 2,000CC boiling water at 100 ℃ and further heated for 5 to 10 minutes And 0.23 to 0.27CC of the liquid additive obtained by the step of water purification is mixed with the low-carbon coal. Combustible body using low-carbon coal and food waste and sewage sludge.