SU112367A1 - Method of producing carbon black - Google Patents

Description

When producing furnace black, from gaseous or liquid raw materials by known methods, products of incomplete grief after the activator are cooled by the introduction of water in a spray state, and then sent to carbon black-catching devices. In this case, the physical heat of the products of incomplete combustion, which is spent on the evaporation of the water introduced into them, is lost, and the dilution by about 50% of water vapor greatly complicates the afterburning of these products.

Surface heat exchangers have not been applied because soot, settling on the heat exchange surface, prevents heat transfer and reduces the living cross section for the passage of gases.

When producing, for example, furnace black, from natural gas by known methods, about 10% of the calorific value of the raw material is useful, and the heat waste is almost 90%.

The aim of the invention is to fully utilize the calorific value of the raw materials used to produce carbon black, the actual production of which becomes an additional (and preliminary) operation. According to the invention, this is achieved by the fact that products of incomplete combustion with a temperature of about 1000 ° after the activator are sent to trap soot in cyclones made of heat-resistant steel or refractory materials.

Soot trapped in successively installed cyclones is collected in bunkers, from where it is fed to packaging, pelletizing, direct use or storage, and the products of incomplete combustion together with uncooled soot are sent as fuel to power plants, for example, to small boilers of CHP plants, where the afterburning of high-temperature products Incomplete combustion, not containing extraneous moisture, occurs steadily and completely, which ensures high sanitary cleaning of flue gases.

In order to increase the efficiency of cyclones when they pick up high-temperature products of incomplete combustion of soot, the latter are coagulated using high-speed dust collectors, ultrasound, or other known means.

Equipment for the production of carbon black, consisting only of a reactor, cyclones and devices for collecting trapped carbon black, can be installed, for example, in front of a power plant running on natural gas. In this case, when 50% of the soot obtained in the reactor is collected in cyclones and the amount of 18,000 tons per year is generated, up to 116 million kcal / hour of heat, or the corresponding amount of electricity, can be obtained by using tenl process waste.

The same equipment can be used to produce soot from associated gas, not used in oil fields.

Subject invention

A method of producing carbon black from a gaseous or liquid raw material with its capture in cyclones and subsequent burning of products of incomplete combustion, characterized in that, in order to simultaneously increase the efficiency of cyclones and the energy use of process heat, soot immediately after the activator is coagulated in a known manner.