RU174087U1 - REACTOR FOR PRODUCTION OF TECHNICAL CARBON - Google Patents

Abstract

The proposed utility model relates to the production of carbon black, namely, its purification from mechanical impurities. The goal is achieved by the fact that in the proposed reactor to produce carbon black, consisting of a horizontal part, including a combustion zone and a reaction zone, and a vertical part, including inertia a trap made of refractory material connected by a transition in the form of a trap cone with a hardening zone, the diameter of the trap is 2.2-2.8 diameters of the reactor in the reaction zone, the trap cone is lined with mullitocor undized products of a smoothed shape, and the trap recess plate is reinforced by mounting stiffeners.

Description

The proposed utility model relates to the production of carbon black, namely to its purification from mechanical impurities.

Purification of carbon black (carbon black) from mechanical impurities is a mandatory and very important element of the process. The presence in the carbon black of foreign inclusions eliminates the reinforcing effect of carbon black, due to its main indicators.

It is most advisable to pre-separate mechanical impurities (lining and grit particles) directly from the carbon black mixture coming from the reaction zone.

It is known to clean carbon black in the vertical part of the reactor, the lower zone of which is a lined inertial trap of large diameter made of refractory material (V.I. Ivanovsky. Carbon black. Processes and apparatuses. Textbook. Omsk, 2004, p. 167, prototype )

The carbon black aerosol in an inertial trap loses speed and changes direction several times. Due to inertia and gravity, there is a release of particles of lining and grit from the carbon black aerosol, which are deposited in the lower part of the trap. In the lower part of the trap there is a special recess designed to collect trapped mechanical impurities and prevent their removal into the stream. The lining particles are removed from the trap during periodic cleaning, the grit particles are burned when the reactor is switched to full combustion mode.

A disadvantage of the known installation is the incomplete separation of impurities from the carbon black gas stream.

At the point of transition from the trap to the hardening zone of the reactor at the corners of the bricks, temperature stresses arise during operation, the corners of the bricks are destroyed and the refractory material enters the carbon black, polluting it. Also during operation, problems arise with the burning of the trap plate (hearth): at high temperatures, about 1300 ° C, coke (grit) begins to burn in the lining, which threatens overheating of the metal case and the reactor breakdown.

The objective of the proposed utility model is to increase the efficiency of purification of carbon black from mechanical impurities and increase the operational characteristics of the device.

This goal is achieved in that in the proposed reactor for producing carbon black, consisting of a horizontal part including a combustion zone and a reaction zone, and a vertical part including an inertial trap made of refractory material, connected by a transition in the form of a trap cone with a hardening zone, the diameter of the trap is 2.2-2.8 diameters of the reactor in the reaction zone, the trap cone is lined with mullite-corundum products of a smoothed shape, and the trap recess plate is reinforced by mounting stiffeners.

Distinctive features of the proposed solution are:

- the diameter of the trap is 2.2-2.8 diameter of the reactor in the reaction zone;

- the trap cone is lined with mullite-corundum products of a smoothed shape, so that there is no temperature stress and subsequent destruction of refractories, with their entrainment into carbon black;

- the trap recess plate is reinforced by mounting stiffeners.

The proposed reactor is schematically represented in Fig., Where:

1 - reaction zone (combustion zone not shown), 2 - hardening zone, 3 - inertial trap, 4 - trap cone, 5 - mullite-corundum products, 6 - deepening of the trap, 7 - mullite-corundum refractories; 8 - plate deepening traps; 9 - stiffeners.

A carbon black and gas mixture, falling from reaction zone 1 with an internal cross-sectional diameter of about 700-900 mm into an inertial trap 3 of a larger diameter (at least 2000 mm), sharply loses speed and changes direction by 90 °. Due to inertia and gravity forces, foreign inclusions are separated, which are deposited in the lower part of the trap, equipped with a special recess 6, designed to collect mechanical impurities and prevent the entrainment of foreign inclusions into the flow of the carbon black gas mixture. The purified carbon black gas mixture enters the quenching zone of reactor 2.

Changing the ratio of the diameter of the trap to the diameter of the reactor in the reaction zone provides a decrease in the rate of the carbon black gas mixture and contributes to the process of separation of foreign impurities.

The lining of the trap cone, made of mullite-corundum products 5 of a smoothed shape, with overlapping of all seams, ensures reliable gas tightness of the lining, eliminates the possibility of refractory material entering the target product, and also prevents overheating and redness of the upper part of the metal body of the trap.

In order to prevent burning of the plate of the deepening of the trap 8, it was reinforced by mounting stiffeners 9, in particular, of steel 20, which are welded into a grid with a cell diameter of 230 * 230 mm.

Thus, the introduction of the proposed utility model provides a significant increase in the degree of purification of carbon black from mechanical impurities - the amount of impurities is 12.0 kg / h, which is almost 20% more than in the prototype (10.2 kg / h). In addition, the operational characteristics of the device as a whole are improved as a result of eliminating the failure of the reactor during the cleaning of the carbon black mixture from mechanical impurities.

Claims (1)

A reactor for producing carbon black, consisting of a horizontal part including a combustion zone and a reaction zone, and a vertical part including an inertial trap made of refractory material, connected by a transition in the form of a trap cone with a hardening zone, characterized in that the diameter of the trap is 2.2- 2.8 diameters of the reactor in the reaction zone, the trap cone is lined with mullite-corundum products of a smoothed shape, and the trap recess plate is reinforced by mounting stiffeners.

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