RU81725U1 - REACTOR FOR PRODUCTION OF LOW-ACTIVE BRANDS OF TECHNICAL CARBON - Google Patents

Abstract

The utility model relates to reactors for producing carbon black and can be used to obtain low-active grades of TU. In the reactor for producing low-active grades of carbon black, including a combustion chamber with means for burning fuel with air, a multi-channel nozzle and a reaction chamber, the nozzle is provided with channels with a diameter of 100-200 mm, and at a distance of 100-500 mm from the outlet openings of the channels in the reaction zone made radial holes for installing raw nozzles corresponding to the number of channels.

Description

The utility model relates to the technology for producing carbon black and can be used in the production of low-activity grades used as a filler for rubbers.

A known reactor for producing low-active grades of carbon black, including a combustion chamber with devices for introducing a fuel-air mixture of radially and axially flows of combustion products, a mixing nozzle with radially arranged feed nozzles for injection of raw materials (RF patent No. 1462788, class C09C 1/50).

The disadvantage of this reactor is the high coke formation, which degrades the quality of carbon black and coke builds up on the wall of the reaction channel, to eliminate which the reactor is periodically switched from the carbon black production mode to the complete combustion of fuel gas, which contributes to the destruction of the lining of the reactor.

Known reactors for producing carbon black, including a combustion chamber with means for burning fuel with air, a multi-channel mixing nozzle with feed nozzles and a reaction chamber with means for cooling carbon-gas products (RF patents No. 2131766 and No. 2179564, class. C09C 1/48).

These reactors are used to produce highly dispersed carbon black grades, since when raw materials are introduced into a high-speed stream (the velocity of the combustion products in the channels is 250-300 m / s), the raw materials quickly and completely mix with the combustion gases.

The objective of the utility model is to obtain low-active grades of carbon black in reactors with a multi-channel mixing nozzle.

The problem is solved in that in a reactor for producing carbon black, including a combustion chamber with means for burning fuel with air, a multi-channel nozzle and a reaction

the chamber, the nozzle is equipped with channels with a diameter of 100-200 mm, and at a distance of 100-500 mm from the outlet openings of the channels in the reaction zone, radial openings are made for installing raw nozzles corresponding to the number of channels.

Figure 1 - shows a longitudinal section of a reactor,

Figure 2 - shows a section along aa, where:

1 - burner device, 2 - air chamber, 3 - combustion chamber, 4 - narrowed nozzle channels, 5 - holes for feed nozzles, 6 - reaction chamber, 7 - holes for introducing a cooling agent.

The carbon black reactor includes a housing in which a combustion chamber 3 with means for introducing fuel gas 1 and air 2, a multi-channel nozzle with narrowed channels 4, a reaction chamber 6 with nozzles 5 for introducing raw materials, and channels 7 for introducing a cooling agent are arranged sequentially and coaxially.

The method of producing carbon black is as follows.

Preheated air through the air chamber 2 is fed into the burner device 1, where it is mixed with the fuel supplied to the burner. The mixture of fuel and air is burned in the fuel combustion chamber 3 with the formation of a high-temperature flow of combustion products, which enters the narrowed channels 4 of the multi-channel nozzle. The number of narrowed channels can be from two to six, depending on their diameter (100-200 mm). The speed of the flue gas in the channel is 250-300 m / s. At a distance of 100-500 mm from the outlet openings of the channels in the reaction zone, radial openings 5 are made for the feed nozzles through which hydrocarbon feed is supplied to the reactor, the number of nozzles corresponding to the number of channels. High-speed flue gas flows at the entrance to the reaction chamber 6, meeting with perpendicular jets of raw materials, provide quick mixing and heating of the raw material to the decomposition temperature. Then the speed of the flue gas with the fumes of raw materials drops sharply to 50-60 m / s due to the large

the diameter of the reaction zone of 600-800 mm At this flow rate, the raw materials are decomposed directly to form carbon black and gaseous products. Undesirable oxidation processes of carbon black are interrupted by the supply of a cooling agent through channels 7.

In this way, in the proposed reactor, carbon black is obtained with a specific surface area of 30 to 50 m2 / g, a mass fraction of the residue after sieving through a sieve with a 014K sieve — 0.009-0.015, yield based on raw materials, wt.% - 71.4-73, four.

Claims (1)

A reactor for producing low-active grades of carbon black, including a combustion chamber with means for burning fuel with air, a multi-channel nozzle and a reaction chamber, characterized in that the nozzle is provided with channels with a diameter of 100-200 mm, and at a distance of 100-500 mm from the outlet openings of the channels in the reaction zone, radial holes are made for installing raw nozzles corresponding to the number of channels.