CS214009B1 - A method of removing degradation products of fuels and soot from heating surfaces and flue pipes of heating installations - Google Patents

Abstract

The invention solves the problem of removing deposits and products of thermal decomposition of fuels from heating and cooling cylinders by burning them in oxygen. The subject of the invention application relates to the field of fuel engineering.

Description

(54) Method of removing degradation products of fuels and soot from heating surfaces and flue gas ducts of heating equipment

The invention solves the removal of non-deposits and thermal decomposition products of fuels from heating and liqueur liquors by burning them in oxygen. The present invention relates to the fuel industry.

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The invention relates to a method of de-nitrating non-adherents and thermal decomposition products of fuels, wherein the conditions are selected to substantially affect the economics of the cleaning process without affecting the cleanliness of the heating surfaces and the environmental risks associated with the use of chemical preparations.

It is known that during combustion of gaseous, liquid and solid fuels, a plurality of devices intended for the purpose of adhering to products of incomplete combustion, decomposition, occur at the interface surfaces. The heating surfaces ea and use aads, enriching tars of an aggressive nature, promoting corrosive processes · violet contamination affects the efficiency of the plant, which, for example, in boilers, results in splitting of flue gas temperatures and undesirable outgoing gas composition. Surfaces clogged with eadzaml and thermal decomposition products and in practice have read irregular, most readily mechanically, but chemical epiosibs are also known.

Mechanical epoeoby uses scrapers, brushes, compressed air or water. The disadvantage of this method of reading is that it is very hard to work, to be curious about the possibility of mechanical damage to the read surface and sometimes even incomplete cleaning.

Some methods of mechanical reading from reasons of high aggressiveness and toxicology can only be carried out using uncomfortable breathing apparatus and protective clothing.

Among chemical agents, widespread methods based on the use of fuel additives are not widely used. associated with very high costs and therefore only of limited use.

According to the present invention, and to prevent the degradation products of fuels and adhesions from heating plates and flue-gas ducts of heating devices, optionally pre-treating them, for example by activating or finishing by mechanical cleaning, e.g. in an environment with a content of 21.5 to 98% oxygen by volume.

Among the advantages of the process according to the present invention, it is particularly necessary to realize that by controlling combustion in an acid environment, the nanoal work of the cleaning process is reduced to a minimum, and the risk of deterioration of the heating surfaces encountered. For cleaning, the workflow does not require work in a harmful and unhygienic environment, does not pollute and waste water, as is the case with the use of harmful chemicals.

The canoes of the heating boilers of the training system are, after appropriate treatment, for example activated with amphine, nitrates, chlorides and the like, burned in an oxygen atmosphere, preferably at the furnace operating temperature. It is possible to proceed in such a way that the heating - fuel supply - is reduced to a minimum (maintenance operation) or shut down, and oxygen is added to the required rate and time in a specially adapted supply and / or supply oxygen. In the case where the combustion products contain a higher proportion of inorganic particles, it is necessary, after cooling of the system to be cleaned, to remove these proportions after optionally impregnating auxiliaries such as surfactants, dilute solutions of liquids and / or bases and using pressurized water. The invention is illustrated by the following exemplary embodiment.

Example 1

Boiler surfaces and flue gas flows with a volume of 2 m 2, which are subjected to products of incomplete combustion and decomposition having a thickness of 10 aa, aa, are subjected to controlled burning. The heating power of the furnace is reduced to 20% and oxygen from the pressurized oxygen source is added to the combustion chamber at a rate of 200 l / ain · so that the oxygen content in the combustion chamber reaches 50% by volume.

In a boiler as in Example 1, a fuel oil burner with an output expressed in a consumption of 2 l / h is installed in the combustion chamber. Flame tanning is done with an excess of 50% oxygen ·

Example 3

Coating caused by the burning of light fuel oils, 5 cm thick in the boiler, as well as scary strokes, and after activation with a 2% solution of proplymanine filtrate, controlled combustion in an oxygen environment (50% by volume) 1 / mln to a? furnace space. After removal of the tars and tars, the cooling system is cleaned by subjecting the spray water to the sprayer for 2 hours.

Example 4

The heating surfaces were burnt from a distance of about 3 to 10 cm with a propane-butane burner adapted to clean the surface to be purged with the atmosphere containing a combustion gas in which it contained up to 50% oxygen by volume. Additional purification is performed with printing water according to Example 3.

Claims (1)

Object of the invention A method of eliminating the degradation products of fuels and adhesions from heating surfaces and flue gas ducts of heating equipment and possibly pre-treating them, such as activating or finishing by mechanical treatment, for example with pressurized water, characterized in that deposition of admixtures and thermal decomposition products content 21.5 to 98% oxygen by volume.