A kind of equipment and process for producing biomass waste derived fuel

Abstract

The invention discloses a device and process for producing fuel derived from biomass waste, which integrates winnowing and drying into one, and utilizes the joint action of gravity and wind to carry out two-stage definite winnowing, two-stage fuzzy winnowing, and winnowing. The selection is more effective; the gravity effect is used, the hot wind speed is smaller, and the energy is more energy-saving; the production efficiency is higher by using the spray stirring, fine breaking and heating machine; Add sodium hydroxide solution to drain and lubricate, and the molding effect is better; through three air selection drying heating, one stirring heating, one molding heating, a total of five low-temperature heating and evaporation of the long conveyor belt, the drying is more environmentally friendly and safer; the exhaust gas is used Residual heat, better energy-saving effect, relying on the progress of the above technical equipment, the present invention realizes the progress of the process, reduces the types of equipment, improves the versatility of the equipment, reduces the cost, improves the efficiency, and the moisture content of the biomass waste derived fuel produced Lower, higher density, higher calorific value.

Description

technical field [0001] The invention relates to a treatment method for biomass waste, in particular to an equipment and process for producing fuel derived from biomass waste. Background technique [0002] Biomass waste includes urban biomass waste, urban sludge, agricultural and forestry waste, medical waste, industrial organic waste, etc., and the energy contained in it is more than 8 times the energy used by all human beings. The above-mentioned waste is crushed through multiple channels - air separation - drying - transportation - magnetic separation - evaporation, then magnetic separation, adding sodium hydroxide spray, adding biothermal deodorizing adhesive and then heating, after fully spraying -Stirring-fine crushing-heating and bidirectional continuous extrusion molding into biomass waste derived fuel RDF (abbreviation of Refuse Derived Fuel), which can effectively solve various problems faced by RDF molding. The RDF has the characteristics of large particles, high ...

AI Technical Summary

Problems solved by technology

[0004] In the previous technology, magnetic separation and screening of the crushed mixed garbage was considered to be a failure because the winding problem could not be solved; the drying process was added in the molding process, due to the melting point, ignition point, volume, and density of the garbage. , The moisture content varies greatly and is not satisfactory; the molding process has been difficult to mass-produce or improve the compactness due to problems such as internal stress, wear, electrostatic repulsion, and power consumption.

[0005] Municipal biomass waste has three major disadvantages: complex composition, high moisture content, and low calorific value. In the process of forming derivative fuel RDF, sorting and reducing moisture content are the two core difficulties.

Thorough sorting means that stones, glass, metal, animal bones and other inorganic substances are effectively selected, and biomass waste is effectively left behind. The technical problems to be solved in sorting are: dry and wet, soft and hard, difficult to handle; winding It is difficult to separate when they are combined together; the wind force is very sensitive to a single cylinder, cuboid, sphere, angle, and sheet, and is sensitive to a single density, thickness, width, and force angle, but the mixed biomass waste is affected. The comprehensive influence of different shapes, densities, weights, and scales is not obvious in winnowing

[0006] Before the derivative fuel RDF is formed, it is an effective way to reduce the moisture content of the crushed garbage. The previous technology uses drying or natural air drying, which consumes energy, time, and is unsafe, and there is a large amount of dust and toxic gas emissions; naturally Drying is time-consuming, smelly and takes up land

[0007] The previous production process of biomass waste derived fuel RDF has the following problems: the crusher is easy to be entangled, damaged, and easily stuck, which seriously affects the production progress; the screening machine is blocked by hanging materials, and it is impossible to screen out soil, glass, stones, and metal etc.; the magnetic separator is seriously hung with material, and the iron wire and steel wire are covered with plastic bags, cotton cloth, and ropes. Garbage needs to be blown up, which consumes a lot of energy; the winnowing machine is difficult to identify and separate the entangled and combined garbage; the equipment has no obvious response to on-site debugging, is not flexible and convenient, does not reflect the overall process idea clearly, and winnowing does not work The role of decisive equipment; the gravity of garbage has not been effectively used, and the wind has not always used gravity to complete the step-by-step winnowing; wind is sensitive to a single shape, density, weight, and scale, but not sensitive to mixed garbage after crushing , for this point, the previous winnowing machine was used as a shortcoming rather than an advantage, resulting in a breakthrough in the technical thinking of the winnowing machine; the winnowing machine and the dryer are used independently, occupying land, investment, labor and energy consumption; High-temperature drying of the dryer will cause toxic gas and a large amount of dust emission, high temperature is easy to catch fire, and it will also make the plastic curl and harden to produce internal stress that is not conducive to molding; the exhaust heat of the internal combustion engine and the waste heat of gasification are not utilized; the role of external additives is not considered

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