JP2826958B2 - How to convert rubber waste into fuel - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the conversion of solid rubber waste into fuel having good flammability.

[0002]

2. Description of the Related Art At present, most solid rubber wastes are buried and disposed of as industrial wastes, but this requires a large amount of cost, and in recent years it has become difficult to secure new treatment plants, and from the viewpoint of environmental protection. There is a problem. Originally, rubber waste
Although a large amount of energy is contained, equipment that directly burns energy to recover energy has problems such as the generation of harmful smoke and the large heating value that damages the combustion furnace in a short time. Was difficult.

[0003]

SUMMARY OF THE INVENTION The problem of improving the moldability of briquetting solid rubber waste into fuel, improving the combustibility of the resulting fuel, and combusting rubbers is a major problem.
To prevent the occurrence of black smoke that.

[0004]

SUMMARY OF THE INVENTION According to the present invention, a crushed solid rubber waste is kneaded with a water-containing paper sludge and a liquid fuel in a kneading machine to prepare a moldable substance, which is then molded in a molding machine such as a briquetter. In this case, the moisture content of the molded
The most main feature is to keep the value at least 30% or more .

[0005] The rubber waste to be converted into a fuel according to the present invention is not particularly limited as long as it is a solid. Natural rubber, chloroprene rubber, nitrile rubber, EPT rubber and the like can be used regardless of the type of rubber, and reinforcement of glass or the like can be used. Materials may be included.

An essential component of the briquette fuel of the present invention is paper sludge. Paper sludge is industrial waste discharged from paper mills.It is waste cellulose containing inorganic compounds such as clay, talc and calcium carbonate.It contains a large amount of water, and its moisture content is reduced by ordinary means such as mechanical filtration and pressing. It can only be reduced to about 60%, has no naturalness, and even if it is co-fired with coal or the like, it is difficult to burn it only because its surface is carbonized. The present inventors have found that when paper sludge has good affinity for fuel oil and briquettes, the combustibility is extremely good, and reached the present invention. That is, when the crushed solid rubber-based waste is kneaded in a kneader together with water-containing paper sludge and liquid fuel, it becomes a paste and has good moldability, and the briquette molded with a briquetter retains the capillary of cellulose and holds
It was confirmed that, in combination with the moisture contained therein, the flammability was good, and black smoke was not generated and burned very well.

When the same cellulose was cut and immersed in water and finely cut in place of paper sludge and tested in the same manner, the moldability was poor, and black smoke was generated when briquetted and burned.

Examples of the fuel oil used in the present invention include general fuel oils such as heavy fuel oil C, kerosene, and kerosene, as well as mechanical oils and carbonized oils obtained by carbonizing rubber, but are not limited thereto. Not something. Highly viscous oils such as asphalt, bitumen, and coal tar pitch can also be used.

The ratio of the used paper sludge to the fuel oil is 0.1 to 1.0, and particularly preferably 0.3 to 0.8, of the fuel oil per 1 cellulose contained in the paper sludge. If the fuel oil is less than 0.1, moldability and flammability are poor, and if it is more than 1.0, that is, if the amount of paper sludge is small, black smoke is easily generated. The amount of the solid rubber-based waste is preferably not more than 1.0 with respect to one cellulose contained in the paper sludge. In addition, the total amount of fuel oil and solid rubber waste is 1.2 or less per cellulosic component of paper sludge.
Particularly, 0.5 to 1.1 is preferable.

The main components of the fuel briquette of the present invention are: Solid rubber waste, paper sludge and fuel oil,
Other combustibles as needed, for example, waste rubber glue discharged from rubber factories, carbon formed by carbonizing rubber,
Waste paper from the factory can be added. The amount of these additives is preferably about 0.8 to 1.2 per cellulosic component 1 of paper sludge in combination with solid rubber waste and fuel oil. In addition, waste paper must be cut into briquettes, soaked in water and finely divided.

The moisture content of briquette fuel during molding is 45
It is not necessary to adjust the water content because the dewatered paper sludge usually contains about 60% of water. However, when the proportion of solid rubber waste or carbon to be added is large, the mixture may be mixed. However, it is preferable to increase the water content by adding water, since the water content tends to be small and the moldability deteriorates. To prevent the generation of black smoke at the time of combustion, the moisture content of briquettes at the time of combustion is very important and differs depending on the mixing ratio of briquettes. However, about 30% or more is required. Become. However, if the water content is too high, the ignition time of the briquette becomes longer, so it is preferable to dry the briquette as necessary.

One of the features of the fuel briquette of the present invention is that the combustion exhaust gas is beautiful. Normally, solid rubber contains sulfur as a vulcanizing agent and may contain chlorine depending on the type of rubber, but when the briquette of the present invention is burned, neither sulfur oxidation nor chlorine compounds are contained in the exhaust gas. Very clean with almost no dust. Although the reason for this is not necessarily clear, it is considered that calcium carbonate contained in the paper sludge and magnesium hydroxide contained in the talc function as desulfurizing agents and dechlorinating agents.

The kneading of solid rubber waste, paper sludge, fuel oil, etc. does not require any particular heating or cooling, and can be carried out at room temperature. The kneading machine uses a usual kneader, Banbury mixer, extruder, etc. Can be Hereinafter, the present invention will be described with reference to examples.

[0014]

Example 1 100 parts of paper sludge (hereinafter abbreviated as PS) discharged from a papermaking company (cellulose content 24%, inorganic compound such as talc 16%, moisture 60%), kerosene 8 parts as fuel oil, rubber A waste rubber belt containing a glass core discharged from a factory was crushed with a 10 mm screen crusher, and 11 parts were kneaded with a kneader, and then formed into a cylindrical shape having a diameter of 15 to 20 mm with an M-type briquetter. The moldability was very good. After heating up the combustion furnace using LPG as an auxiliary fuel, this briquette 500g
When the gas was injected into the combustion gas, the furnace temperature dropped rapidly and light white smoke was observed in the exhaust gas. However, the temperature in the furnace increased after ignition of the briquettes, and the exhaust gas became colorless and transparent.

[0015]

Examples 2-3 In place of the kerosene of Example 1, low-Ruo yellow C heavy oil as fuel oil and a carbonized oil obtained by carbonizing rubber were subjected to a test in the same manner as in Example 1, and as a result, the moldability was also improved. Often,
The exhaust gas was also colorless and transparent.

[0016]

[Comparative Example 1] Instead of PS in Example 1, water-containing paper (a piece of paper cut and immersed in water to make fine, cellulose content 20%,
The same test was conducted using 100 parts of water (80% moisture), but the moldability was poor, and black smoke was generated in the combustion test.

[0017]

Examples 4 to 7 Table 1 shows the results of tests with various compounding compositions.
Shown in

[0018]

[Table 1]

[0019]

Embodiment 8 PS 100 parts, hydrated paper 20 parts, waste rubber 10
, 4 parts of dry distillation oil, and 4 parts of waste machine oil were burned, and the exhaust gas and combustion ash were analyzed. Exhaust gas analysis result Dust concentration 0.01 g / Nm ³ JIS Z880
8 No detection of SOx concentration No detection of chlorine concentration by turbidimetric method Analysis result of briquette combustion ash by o-tolidine spectrophotometry Cadmium <5 mg / kg Total sulfur 1.00% Chloride ion 0.42% Hexavalent chromium <2 mg / kg Total chromium 35mg / kg Exhaust gas does not contain SOx and chlorine, the dust concentration is extremely low and there is no concern about pollution. From the analysis results of briquette combustion ash, combustion ash can be dumped as waste.

[0020]

Example 9 In order to see the effect of moisture content in briquette on flammability, 500 g of each prepared according to the formulation of Example 5
The briquettes were air-dried to produce briquettes having different moisture contents and subjected to a combustion test. Ignition time, after heating up the combustion furnace, charged the briquettes, measured the time from injection to ignition

[0021]

[Table 2]

As is evident from the results in Table 2, the ignition time is shorter as the water content is lower , but the water content is lower.
And black smoke are likely to be generated, so the moisture content of the briquette is
It is necessary to retain at least about 30% or more.

[0023]

As described above, according to the present invention, a composition having good moldability is prepared by kneading a crushed solid rubber waste together with a hydrated paper sludge and a liquid fuel by a kneading machine, and the composition is made into briquettes and burnt. And that
The moisture content of the briquette should be at least 30%.
This improves the flammability and is a major problem in the combustion of rubbers.
Elimination of black smoke, which is the subject of the issue, makes it possible to effectively use solid rubber waste conventionally buried as industrial waste as a non-polluting fuel that does not emit harmful substances such as dust and Sox. Was. In addition, other flammable substances such as waste carbon, waste rubber paste, waste paper, etc., discharged from a rubber factory can be added to the fuel composition as needed, which leads to effective use of factory waste. is there.

Continuation of the front page (72) Inventor Yoshikazu Fujita 172 Ikezawa-cho, Yamatokoriyama-shi, Nara Pref. Nita Co., Ltd. Examiner in Nara Factory Eiji Takahori (56) References Sho 56-62891 (JP, A) Shokai Sho 56-11912 (JP, U) (58) Fields investigated (Int. Cl. ⁶ , DB name) C10L 5/48 B09B 3/00

Claims (1)

(57) [Claims] [Claim 1] create a kneaded moldable Naru material was crushed solid rubber waste kneader with water paper sludge and liquid fuels, and molded in such a Buriketta molding machine, the moisture of the case moldings At least 30%
A method for converting rubber waste into a fuel, comprising: