Briquetted solid fuel

FIELD: chemistry.

SUBSTANCE: invention relates to producing efficient briquetted solid fuel for household heating ovens, fireplaces, heating devices for hot water supply and gas powered electric generators. Described is briquetted solid fuel which contains activated charcoal screenings and ballistit powder ground to particle size of 0.5-1.0 mm, and the binder used is polyacrylamide, with the following ratio of components, wt %: activated charcoal screenings 75-86, ballistit powder 10-20, binder 4-5.

EFFECT: invention enables to simultaneously solve problems relating to the environment, resource saving and recycling potentially hazardous high-energy components.

1 tbl

 

The invention relates to the development of effective briquetted solid fuel for domestic heating stoves, fireplaces, and heating devices heat water supply, Autonomous electrogeneration and other

Famous recipes briquetted solid fuel-based substances remineralise origin - processing products charcoal Pat. EN 2187542 C1; on the basis of coal and binder Pat. EN 2208044 C1; U.S. Pat. EN 2043392 C1, U.S. Pat. EN 2373261 C1; U.S. Pat. U.S. No. 3592779, on the basis of wastewater sludge (WWS) Pat. EN 2161641 C1, as well as the formulation of peat briquettes according to GOST 9963-84. Among them one of the most common is the recipe peat briquettes according to GOST 9963-84 adopted by the authors for the prototype.

A common disadvantage of the known formulations briquetted solid fuel is reduced Flammability and insufficient mechanical strength of the briquettes, which leads to their destruction during operation and transport, uneven burning, with changes in the geometric shape of the briquettes.

In addition, analogs and prototype inherent ash content of the order of 15-25%. When this ash from the combustion itself often requires its recycling or disposal. Famous recipes also have unsatisfactory characteristics on the ignition temperature and heats the combustion.

The technical task of the invention is the creation of environmentally friendly formulations briquetted solid fuel, providing, along with high calorific value, high Flammability in combination with low ash content and a satisfactory mechanical characteristics of the solid fuel briquettes in the operation.

The problem is solved by creating a recipe briquetted solid fuel, including screenings of active charcoal, crushed ballistic powder and binder.

Screenings active charcoal used as a source of raw materials, waste production (on the fractional composition) active charcoal crushed coal (GOST 6217-74). Screenings active charcoal have a high ignition temperature (~700°C). The consequence of this is the complexity of their use as a fuel component in (pure) form.

As ballistic powder use subject to disposal or destruction of ballistic powder, not containing salts of heavy metals and other hazardous components.

The technical result of the invention is achieved by use as part of a briquetted solid fuel screenings active charcoal and artillery balistas the private gunpowder, crushed to dispersion of 0.5-1.0 mm, and as a binder - polyacrylamide in aqueous solution brand N-600 on THE 6-02-0029912-61-67, either in the form of flocculant brand "Praestol-2510" THE 2216-001-40910172-98 in the following ratio, wt.%: screenings active charcoal 75-86, ballistic powder 10-20, binder (PAA) 4-5.

The invention is presented in the table below examples of the experimental formulations briquetted solid fuel, and is that with the introduction of the briquetted solid fuel crushed in the form of chips having an overall particle size of 0.5...1.0 mm ballistic powders is significantly improved Flammability briquettes. When this lower limit, the overall size of the powder fuel ballistic crumbs 0.5 mm limited technological capabilities grinding, and the upper limit 1.0 mm due to the need to ensure uniform combustion of the briquettes. Introduction ballistic fuel crumbs in the composition of the briquettes also improves the mechanical characteristics briquetted solid fuel.

As you know, burning ballistic powder occurs with evolution of considerable heat for a short time, providing a high-gassing. Estimated energy ballistic powders, usually amounting to 3.8 to 6.0 is j/kg, during their interaction with the oxygen of the air is increased about 2 times.

In the sample No. 1 (table) refused to fire, due to a lack of ballistic powder in the composition and, accordingly, the gaseous products of combustion, actively contributing to the ignition of the briquettes. With the introduction of the 10% (sample No. 2) crushed ballistic powder improves the Flammability and provides the necessary ignition temperature of the briquette - 200-250°C, its effectiveness, including the calorific value, which is higher than peat briquettes prototype. With the introduction of the 30% or more ballistic gunpowder sensitivity briquetted solid fuel to mechanical stress, namely, sensitivity to impact, becomes invalid. Definition of sensitivity to mechanical impact was conducted according to current methods of assessing these characteristics for explosive components.

The introduction of the briquetted solid fuel 10...20% crushed ballistic powder allows to obtain an optimal set of characteristics (samples№№2, 3, 4, 5).

The lower limit of the content of the screenings active charcoal 75% provides a relatively high energy efficiency of briquettes as a heat element, and the upper limit 86% Ogre the border need content in brittoniana additional fuel components, namely ballistic powder to 20% and the binder - PAA 4-5%. The lower limit of the content of the binder allows you to provide an effective bond to the mass of the briquette in General, and the upper limit is limited by the energy inactivity, reducing energy briquetted solid fuel.

Currently, the main source components patentable briquetted solid fuel: screenings active charcoal, ballistic powder with an expired warranty period of storage is not found practical application of direct and destroyed by burning or burial, that adversely affect environmental surroundings.

When using these components in the composition of the proposed briquetted solid fuel solved this problem, at the expense of the actual combined recycling and a positive effect of improved Flammability, lower ash content, high calorific value with satisfactory performance briquetted solid fuel. Made in laboratory bitterbynde solid fuel is highly flammable and burns with a red glow without the formation of an open flame, soot and odor. Experiments with fuel briquettes carried out in experimental conditions, the Federal government Unicorno the enterprise "Scientific-research Institute of polymeric materials".

Bitterbynde solid fuel, including screenings of active charcoal, ballistic powder, crushed to a particle size of 0.5-1.0 mm, and polyacrylamide in the following ratio, wt.%:

screenings active charcoal75-86
ballistic powder10-20
polyacrylamide4-5



 

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