TWI566847B - Recycling of environmentally friendly sludge into fuels - Google Patents

Description

Method for recycling environmentally friendly sludge to make fuel

The invention relates to a method for manufacturing a fuel, in particular to a method for recycling environmentally friendly sludge to produce fuel.

Commonly used business wastes mainly include water purification plant sludge, sewage sludge, pulp paper sludge, textile sludge, stone sludge, waste cast sand, etc., in order to avoid occupying a large amount of waste and occupying land, usually The waste will be incinerated, buried, or otherwise processed to convert waste into renewable materials, thereby implementing the concept of environmental protection and promoting economic development.

Taking pulp and paper sludge and textile sludge as examples, at present, it can be recycled into fiberboard, fireproof board, waterproof and heat insulation soil cloth.

For example, in the treatment of waste tires, plastics, and rubber, it is usually treated by cracking to refine raw oil. In the cracking process, carbon black is accompanied, and there is no way to properly reuse carbon black. However, because carbon black is rich in carbon, some manufacturers will sell the produced carbon black to his factory for coal combustion, but because of the high cost of cracking treatment, if it is simply sold, for carbon black manufacturers. Not cost-effective.

Therefore, practitioners in related fields have no trouble to study the method of properly treating or recycling the carbon black.

Therefore, the object of the present invention is to provide a recycling environmental protection The sludge is made into a fuel method, which can effectively recover the pulp sludge and the textile sludge and re-form the carbon black generated by the waste cracking to achieve environmentally-friendly recycling.

Thus, the method of the invention for recycling environmentally friendly sludge into a fuel, The carbon black is mixed with the pulp sludge and stirred to form a dough. The mixture ratio of the carbon black to the pulp sludge is at least 3:10 or more, and the fuel is prepared after being dried.

In addition, pulp and paper sludge can also be replaced by textile sludge.

The utility model has the advantages that the pulp paper and the textile sludge can be effectively recovered and regenerated into carbon by the carbon black generated by the cracking of the waste, and the fuel has a burning value of at least 6000 kcal/kg or more, compared with the same weight. The pure carbon black fuel produced by the method can not only improve the burning value, but also improve the recycling rate of the pulp sludge and the textile sludge, and can truly meet the environmental protection demand.

A preferred embodiment of the method for recovering environmentally friendly sludge from the present invention is to mix carbon black with pulp paper sludge and stir evenly to form a dough. The mixing ratio of carbon black to pulp paper sludge is It is at least 3:10 or more, after which it is made into a fuel after the dough is dried and dried.

In particular, the carbon black is obtained by using the waste wheel. Wastes such as tires, plastics, and rubber are burned in a vacuum environment at a temperature ranging from 500 ° C to 900 ° C to cause waste to be cracked. Combustion in a vacuum environment, because it is not in contact with oxygen, can maintain the calorific value of the substance, avoid complete combustion and oxidize the desired components, so that the burned product can no longer be used for other purposes. Thereafter, the particle size of the carbon black is first selected to be 1 mm or less, and the unnecessary metal component in the carbon black is magnetically removed, and the particle diameter of the carbon black is again screened to 0.25 mm or less. The carbon black thus obtained can be used as a raw material of the method.

In addition, because pulp paper sludge usually contains some water, When the pulp paper sludge contains less water, during the stirring process, an appropriate amount of water can be added and stirred until it is well mixed. When the pulp paper sludge contains more water, no additional water is needed during the stirring process. In addition, the dry drying method can be naturally dried and dried for at least 24 hours.

In addition, the pulp sludge used in the method can also be woven The sludge is replaced, and the carbon black is similarly mixed with the textile sludge in a mixing ratio of at least 3:10 or more and stirred uniformly to form a dough, which can be made into a fuel after being dried.

Further referring to Table 1 below, the heat value of general carbon black is approximately For 7475kcal/kg, the calorific value of coke is about 5723kcal/kg, the calorific value of pulp sludge is 4100kcal/kg on average, and the calorific value of textile sludge is 3841kcal/kg on average. The calorific value of the fuel needs to reach a calorific value of about 5723 kcal/kg or more.

Table 1

Referring to Table 2 below, the carbon black which is mixed with the whole weight ratio of different pulp sludges is mixed with 100 wt% pulp paper sludge, and is made into a fuel according to the method of the present invention, and is tested for use as a fuel for coal. The results are as follows:

Referring to the following Table 3, 100wt% of the textile sludge is mixed with carbon black which accounts for the whole weight ratio of different textile sludges, and is made into a fuel according to the method of the present invention, and is tested for use as a fuel for coal. as follows:

From the results of Table 2 and Table 3 above, it is known that carbon black and pulp paper The sludge or the textile sludge is used as a raw material in a mixed weight ratio of at least 3:10 or more, and the finished product produced by the method of the present invention can be used as a fuel.

In summary, the method for recycling environmentally friendly sludge into a fuel can effectively recover pulp paper sludge and textile sludge, and re-form fuel with carbon black generated by waste cracking, so that waste can be effectively regenerated. It not only meets the environmental protection requirements, but also produces a fuel that can not only improve the burning value compared with the same weight of pure carbon black, but also recycle the pulp and sludge and textile sludge, and thoroughly implement the environmental protection concept. The object of the invention can be achieved.

The above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent changes and modifications made by the patent application scope and patent specification content of the present invention, All remain within the scope of the invention patent.

Claims (6)

A method for recovering environmentally-friendly sludge into a fuel, wherein carbon black produced by thermal cracking is mixed with pulp paper sludge and stirred uniformly to form a dough, wherein the carbon black has a particle diameter of 0.25 mm or less. And the mixture ratio of carbon black to pulp paper sludge is at least 3:10 or more, and is made into a fuel after being dried. The method for recovering environmentally friendly sludge into a fuel according to claim 1, wherein after mixing the carbon black and the pulp sludge, water is added and stirred until it is well mixed. The method for recovering environmentally friendly sludge into a fuel as claimed in claim 1, wherein the drying time is at least 24 hours. A method for recycling environmentally friendly sludge to produce fuel, wherein carbon black produced by thermal cracking is mixed with textile sludge and stirred uniformly to form a dough, wherein the carbon black has a particle diameter of 0.25 mm or less. Moreover, the mixing ratio of the carbon black to the textile sludge is at least 3:10, and the fuel is prepared after being dried. The method for recovering environmentally friendly sludge into a fuel according to claim 4, wherein after mixing the carbon black and the textile sludge, water is added and stirred until it is well mixed. The method for recovering environmentally friendly sludge into a fuel as claimed in claim 4, wherein the drying time is at least 24 hours.