CN201772480U - A combustion air deflector - Google Patents

Abstract

The utility model discloses a combustion air flow guiding plate, which is used for distributing airflow of combustion air, and comprises a base and a refractory material coating coated on the base; a perforation central hole is formed on the flow guiding plate; and inclined air flow guide holes are also uniformly distributed on the flow guiding plate. The combustion air flow guiding plate has long service life and low maintenance cost, and can improve the operating rate of the black carbon production.

Description

A combustion air deflector

technical field

The utility model relates to a gas deflector, in particular to a deflector used for heat exchange between exhaust gas flow and combustion air in carbon black production.

Background technique

In the modern oil furnace carbon black production process, in order to make full use of the waste heat of carbon black reaction and improve economic benefits, the technological means of preheating combustion air is used, and it is operated in the process. That is to use the hot flue gas flow after the carbon black quenching to exchange heat with the combustion air. The preheating temperature of combustion air reflects the advanced nature of carbon black production technology to a certain extent. In order to reduce the turbulence of the combustion air flow and reduce the possibility of product coking, the preheated high temperature air is passed through the deflector plate to distribute the air flow before entering the combustion chamber. Traditionally, deflectors are metal 310S stainless steel and utilize stainless steel fan fins to distribute the air. 310S stainless steel is an austenitic stainless steel. Its chemical composition is based on chromium and nickel, adding elements such as molybdenum, tungsten, niobium and titanium. Because of its face-centered cubic structure, it has high strength and creep at high temperatures. Variable intensity. It has good oxidation resistance, corrosion resistance, and can continue to work at high temperatures. Therefore, it is widely used in hot air pipelines. However, because nickel-based corrosion-resistant alloys are particularly expensive, they account for a large share of investment. Moreover, after years of production practice, we found that the hot air duct made of 310S will crack and become brittle after several years of use. Due to the high nickel and chromium content of 310S stainless steel, when the above-mentioned phenomenon occurs in the pipeline, its welding repair is also very difficult. Even if it can be welded, the service life will not be long, which has caused great disadvantages to the production of carbon black.

Utility model content

The technical problem to be solved by the utility model is to provide a combustion air deflector with long service life, low maintenance cost and high operating rate of carbon black production.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a combustion air deflector, which is composed of a base and a layer of refractory material protection layer on the base; Center hole and evenly distributed inclined air guide holes.

Preferably, the axes of the above-mentioned air guide holes intersect with the axis of the central hole; more preferably, the axes of each air guide hole intersect with the axis of the central hole at one point.

Preferably, the cross-sectional shape of the base and the protective layer of refractory material is circular, and the diameter of the base is larger than that of the protective layer of refractory material.

Preferably, the refractory protective layer is made of alumina castable; the base is made of ordinary carbon steel.

The beneficial effect produced by adopting the above-mentioned technical scheme is that: the structure of the utility model is provided with a protective layer of refractory material, which has strong thermal shock stability (the performance of resisting temperature changes without destruction is called thermal shock stability), and prolongs the service life , reducing the maintenance time due to the damage of the guide plate, and improving the operating rate of carbon black production; through the set center hole and air guide hole, the natural gas injected from the center hole and the gas entering from the air guide hole can be combined The air is fully mixed and burned, and the effect is better; the base is made of ordinary carbon steel, which saves costs.

Description of drawings

Fig. 1 is a sectional view of the utility model;

Fig. 2 is the left view of Fig. 1;

Among them, 1. Refractory protective layer; 2. Base; 3. Air diversion hole; 4. Center hole.

Detailed ways

Below in conjunction with accompanying drawing and specific embodiment, the utility model is described in further detail.

Referring to accompanying drawing 1, one side of base 2 is poured with refractory protective layer 1, and its material is aluminum oxide, and this air deflector is provided with central hole 4, and this central hole 4 is the jack of natural gas gun, in the center There are inclined air guide holes 3 evenly distributed around the hole 4, and generally 6 air guide holes 3 are arranged. Mix more fully with air. In the production of carbon black, after the air is preheated by the preheater, it is sent to the deflector through the hot air pipeline, and then enters the combustion chamber through the air deflector hole 3 on the deflector, and is connected with the center hole 4 The natural gas ejected from the natural gas spray gun is mixed and then fully burned.

Claims (6)

1. A combustion air deflector, characterized in that: it is made up of a base (2) and a layer of refractory protective layer (1) located on the base (2); There are central holes (4) and uniformly distributed inclined air guide holes (3). 2. The combustion air guide plate according to claim 1, characterized in that: the axis of each air guide hole (3) intersects the axis of the central hole (4). 3. The combustion air guide plate according to claim 2, characterized in that: the axis of each air guide hole (3) intersects the axis of the central hole (4) at one point. 4. The combustion air deflector according to claim 1, characterized in that: the cross-sectional shape of the base (2) and the protective layer of refractory material (1) is circular, and the shape of the base (2) The diameter is larger than the diameter of the refractory protective layer. 5. The combustion air deflector according to claim 1 or 4, characterized in that: the refractory protective layer (1) is made of alumina castable. 6. The combustion air deflector according to claim 5, characterized in that: the material of the base (2) is ordinary carbon steel.

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