Briquetted solid fuel

FIELD: chemistry.

SUBSTANCE: briquetted solid fuel contains activated charcoal screenings and expired ballistit powder, ground to particle size of 0.5-1.0 mm, and polyacrylamide as binder, with the following ratio of components, wt %: activated charcoal screenings - 75…86, expired ballistit powder - 10…20, polyacrylamide - 4…5.

EFFECT: fuel has high calorific capacity, high flammability coupled with low ash content and satisfactory mechanical properties of the briquetted solid fuel during use.

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; on the basis of coal and binder Pat. EN 2208044; U.S. Pat. EN 2043392, Pat. EN 2373261; U.S. Pat. U.S. No. 3592779, on the basis of wastewater sludge (WWS) Pat. EN 2161641, 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 heat of combustion.

the technical object of the present 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 briquetted solid fuel during the operation.

The technical result of the invention is achieved by use as part of a briquetted solid fuel screenings active charcoal and ballistic powder with an expired warranty period of storage (DSC), crushed to a particle size of 0.5-1.0 mm, and as a binder - polyacrylamide (PAA) in aqueous solution brand N-600 on THE 6-02-0029912-61-67 or flocculant brand "Praestol-2510" THE 2216-001-40910172-98, in the following ratio, wt.%: screenings active charcoal 75-86, ballistic powder with an expired warranty shelf life of 10-20, binder (PAA) 4-5.

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.

As ballistic powder expired (DSC) use artillery ballistic powder and solid rocket ballistic Topley is a (BTRT) with expired (DSC), does not contain heavy metals and other hazardous components.

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 is crushed to a particle size of 0.5...1.0 mm ballistic powders with expired warranty period of storage is significantly improved Flammability briquettes. The lower limit to the 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 MJ/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 is offering its combustion, actively contributing to the ignition of the briquettes. With the introduction of the 10% (sample No. 2) crushed ballistic powder with expired DWF improved 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 (sample No. 6) 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 with expired DSC 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 of 86% is limited by the necessity of detention in brittoniana fuel additional components, namely crushed ballistic powders with expired DWF and the binder - PAA 4-5%. Moreover, the lower limit of the amount of light of the respective enable efficient binding of 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 and ballistic powder with expired warranty shelf life, do not find 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 at a satisfactory operational characteristics of patentable briquetted solid fuel. Made in laboratory bitterbynde solid fuel is easily ignited and burned with a red glow without the formation of an open flame, soot and odor. Experiments with fuel briquettes conducted in the experimental conditions of the Open joint stock company "Scientific research Institute of polymeric materials" (JSC "December").

Bitterbynde solid fuel, including from the eve of active charcoal and ballistic powder with an expired warranty period of storage, does not contain heavy metals and other hazardous components, ground to a particle size of 0.5-1.0 mm, and polyacrylamide, in the following ratio, wt.%:

screenings active charcoal75-86
ballistic powder with expired
warranty shelf life10-20
polyacrylamide4-5



 

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