KR940003907B1 - Method of making solid fuel - Google Patents

Abstract

This relates to solid fuel made from industrial wastes and peat. The manufacturing method comprises: 1) mixing 50-70 wt.% of main raw material and 20-30 wt.% of carbonized sludge; 2) adding 1 wt.% binder and 9-19 wt.% deinking carbon as deodorant and combustion additive; 3) and compression molding at high pressure. The main raw material is composed of cokes, pulp sludge, peat, wood particles and rice bran. This fuel removes offensive odors or toxic gas in burning.

Description

Solid Fuel Manufacturing Method

The present invention relates to a method for producing a solid fuel, in particular, the production of solid fuel to remove the odor and harmful gases generated during the combustion of solid fuel mixed with various industrial wastes and peat, such as waste tires, such as waste tires It is about a method.

In already registered patent No. 27478, carbon and ethylene monomer are added by a deodorizing method.

That is, in the above-described registered patent, alcohols and finely divided carbon as deodorant, ethylene or styrene as a deodorant when preparing solid fuels by mixing pettial or paper waste in order to increase combustion burner and improve caking effect on peat coal However, it is difficult to obtain economical solid fuel because carbon or alcohol itself is expensive.

On the other hand, according to Patent Publication No. 89-1922, the additives having excellent cohesion are kneaded, compressed and molded at a strong pressure, and then the molded product is put into a closed furnace and rapidly heated to 500 ° C. so that the thermal change of the bituminous coal occurs so that the strength of the coal is large. Carbonization and hardening occur by mixing additives with porous structures such as diatomaceous earth, zeolite, or the like with additives containing lignin and lignin derivatives or mixtures thereof. Solid fuels are known which are intended to add additives having the same system components as bituminous coal, such as tire coke, coke bristle and petro coke powder.

However, in addition to using the above-mentioned bituminous coal as a main raw material, it must undergo a rapid heat treatment at a high temperature of at least 300 ° C. At this time, there is a condition that the high temperature furnace (rotary chiron) must be in an absolute vacuum state.

In addition, according to Patent Publication No. 89-2776, peat is the main raw material, rosin is used as an adhesive, and coaltal pitch and Koji wood flour are used as a mixture. This is because the Nitan powder is cooled to minus 15-25 ℃ and passed through ammonia vapor. Therefore, a large amount of sulfurous gas is generated during the treatment of ammonia gas and combustion after molding, which leads to the problem of air pollution and enormous cost for simultaneous refrigeration facilities. It is thin and practical.

On the other hand, according to Patent Publication No. 89-2831, homogeneous kneading of chloric acid, chromic anhydride, and bentonite into a waste resin formed by homogeneous mixing of waste synthetic resins without chlorine or sulfur components into aggregates, wood powder, rice husk or low carbon charcoal And a solid fuel obtained by kneading the mixture and waste pulp in the chipped resin body are known.

However, since the use of chloric acid chlorine (KclO) and chromic anhydride (CrO) is not only a possibility of explosion by heating or impact, but also expensive, this has not been put to practical use.

On the other hand, in the prior patent of the inventor (Patent Publication No. 85-1089), the coal head is combined with a paper head, paper sludge, or activated sludge carbide, and then paper mill sludge, coal sifting material (bucket) or wood powder is mixed and formed. It was intended to be press molded.

The present invention utilizes waste discharged from recycled paper companies, in particular pulp-based sludge produced when manufacturing pulp from wood chips and general paper sludge produced when manufacturing kraft paper using pulp as a main raw material, and waste paper such as newspapers and magazines. Or it is to use high-grade sludge which is the main raw material.

The composition of the papermaking sludge is ash in solids except 60-70% of water, and silicon oxide (Sio2), aluminum oxide (Al203), iron oxide (Fe302), magnesium oxide (Mgo), calcium oxide (CaO), and titanium oxide. (TiO 2), sodium oxide (Na 0), and potassium oxide (K 0), and the ignition loss is composed of cellulose, hemicellulose, and lignin.

In addition, the above-described high-fat sludge contains organic decarbonized carbon, which is characterized in that the present invention intends to obtain a steaming, supporting and deodorizing effect by using the dehydrated carbon of the high-fat waste. Another feature is that no extra coagulant is used by extracting and using lignin contained as a heat loss.

Particularly, carbonized dehydrated carbonaceous sludge was dehydrated to less than 60% of moisture by forced drying or rotary drying by rotary kitton, and 6% by weight of lignin sulfonate was added. It is press molding with solid fuel.

The lignin sulfonate is the above-mentioned high-fat sludge waste solution concentrated at a temperature of 100 ° C. for about 1 hour, and about 8% of sulfite or acid sulfite in the total amount of the concentrate is added to a reaction kettle at a high temperature of 120-250 ° C. It means what is obtained by evaporating and drying the product obtained by making it react for 3-4 hours at about 2 atmospheres.

Therefore, according to the present invention, the above-mentioned solid fuel is obtained without the need for expensive carbon or alcohols as a supporting agent or a deodorant, and by using industrial waste, it is possible to obtain the effect of two or two birds.

The present invention will be described in detail according to the following examples.

Example 1

16% by weight of coke tires, 24% by weight ash, 34% by weight of wood flour or chaff, 26% by weight of peat sludge and kneaded 20% by weight of carbonized sludge of paper sludge. A solid fuel was formed by adding a 1 wt% acid salt and 9 wt% dehydrated carbon as a deodorant and a supporting agent to a pressure of 150 tons.

The density of the shaped solid coal was 0.83g / Cm, the heat of combustion was 5,800KCal / kg and the combustion temperature was 1,000-1,200 ℃.

Example 2

Comparative results of the combustion state as shown in the following table were obtained by changing the compounding amount in the same manner as in Example 1.

In the table above,% is% by weight, and * is a timer fine grinding or a small addition of plastics to polypropylene and polyethylene (to check the smell).

The carbonized sludge removes water with a rotary kit and discharges the organic matter in a carbonized state and mixes with the deodorizing carbon (deodorant).

Claims (1)

In the manufacturing method of shaping solid coal from solid fuel, which is made of industrial waste wood flour, waste tire, paper sludge, etc., carbon sludge 20 to 50-70% by weight of main raw material composed of coke, paper sludge, peat, wood flour or rice husk. Method of producing a solid fuel characterized in that the mixing and kneading of -30% by weight and the compression method at high pressure after the addition of 9 to 19% by weight of deodorizing carbon as a deodorant and a coarse agent with about 1% by weight of the binder.