CN105177272A - Horizontal annealing furnace heating section structure - Google Patents

Abstract

The invention discloses a horizontal annealing furnace heating section structure. The horizontal annealing furnace heating section structure comprises a furnace body, wherein one side of the furnace body is connected with a preheating section, and the other side of the furnace body is connected with a connection section; a plurality of groups of furnace rollers which are identical in height are arranged in the furnace body, and a steel band is supported by the furnace rollers; the upper side and the lower side of each furnace roller are respectively provided with a nozzle group consisting of a plurality of nozzles, each nozzle comprises a spraying pipe which is horizontally arranged, a spraying opening is formed in each spraying pipe, and the spraying pipes of each group of nozzles are parallel to one another; the nozzle groups at two sides of the furnace rollers are arranged at intervals; and each upper nozzle group and each lower nozzle group form a combustion area. The horizontal annealing furnace heating section structure has advantages that since the nozzle groups are arranged at intervals, during the heating process of a metal, crystal grains generated when the internal metallic tissue is changed are relatively uniform, so that the mechanical performance of strip steel can be improved, and the surface quality of the strip steel is also improved; and the heating section is designed in a sectional manner, so that the steel strip can be uniformly heated, the temperature of a strip steel plate can be adjusted by controlling the production speed and the temperature inside the furnace, the continuous full-load production of a unit is realized, and the production efficiency is improved.

Description

A heating section structure of a horizontal annealing furnace

technical field

The invention relates to the field of mechanical equipment, in particular to a heating section structure of an annealing furnace.

Background technique

In the production process of stainless steel strip, annealing treatment is required. The strip steel heated in the annealing furnace needs to be cooled by the air cooling section. The existing air cooling section has a relatively simple structure and does not consider the influence of the temperature gradient in the furnace and the cooling method on the strip steel. Therefore, the performance of the stainless steel strip steel is affected. .

Contents of the invention

In order to solve the above-mentioned technical problems, the object of the present invention is to provide a heating section structure of an annealing furnace, which is not only simple in structure, but also comprehensively considers the influence of temperature gradient and heating method on the strip steel, and the specific technical scheme is as follows:

A heating section structure of a horizontal annealing furnace, including a furnace body, one side of the furnace body is connected to the preheating section, and the other side is connected to the connecting section; multiple sets of furnace rollers of the same height are arranged in the furnace body, and the steel strip is formed by The furnace roll is held up; the upper and lower sides of the furnace roll are provided with a burner group composed of a plurality of burners. The burners include horizontal nozzles, and nozzles are arranged on the nozzles. Parallel; the burner groups on both sides of the furnace roller are set at intervals; each upper and lower burner group forms a combustion zone, from the preheating section to the connecting section, which is sequentially divided into zones 1-7, and a convection fan is installed on the top of zone 7.

A cooling structure is arranged inside the furnace roller, and the cooling structure includes a circulation pipeline inside the furnace roller, and the circulation pipeline is connected with the cooling water outside the furnace body.

The advantage of the present invention is: because the burner groups are arranged at intervals, the heating mode of the strip steel becomes the interval mode of direct heating and radiation heating, which changes the single heating mode, such as the single direct heating of the existing gas annealing furnace or the electric furnace The single radiation heating method, during the heating process of the metal, the grains generated when the internal metallographic structure undergoes phase transformation are relatively uniform, so the mechanical properties of the strip can be improved, and the surface quality of the strip can also be improved; in addition, 1 to Zone 4 is a continuous heating zone, and zones 5 to 7 are heat preservation zones. The airflow in the furnace flows from zone 7 to zone 1, so that the temperature in the furnace increases in a uniform gradient. After the strip passes through the preheating zone, the temperature in the heating zone can quickly reach The target temperature of annealing realizes the continuous production of coils. The partition design of the heating section of this horizontal furnace can not only heat the strip uniformly, but also adjust the temperature of the strip steel plate by controlling the production speed and the temperature in the furnace, so as to realize the continuous full-load production of the unit and improve the production efficiency.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Detailed ways

The present invention is specifically described below in conjunction with accompanying drawing, as shown in Figure 1, the present invention comprises furnace body 1, and described furnace body 1 side is connected with preheating section 2, and other side is connected with connecting section 3; Multiple sets of furnace rolls 4 at the same height, and the steel strip 6 is held up by the furnace rolls 4; a burner group composed of multiple burners 5 is arranged on the upper and lower sides of the furnace roll 4, and the burners 5 include horizontally arranged nozzles , nozzles are set on the nozzle, and the nozzles of each group of burners 5 are parallel to each other; the burner groups on both sides of the furnace roller 4 are arranged at intervals; each upper and lower burner groups form a combustion zone, from the preheating section to the connecting section 1-7 districts in turn, and a commutation fan 7 is also set on the top of the 7th district;

A cooling structure is arranged inside the furnace roller 4, and the cooling structure includes a circulation pipeline inside the furnace roller, and the circulation pipeline is connected with the cooling water outside the furnace body.

Claims (2)

1. a Horizental annealer heating zone structure, is characterized in that: comprise body of heater, and described body of heater side is connected with preheating section, and side is connected with linkage section in addition; Arrange many groups furnace roller of sustained height in described body of heater, steel band is held up by furnace roller; The both sides up and down of furnace roller all arrange the burner group of multiple burner composition, and described burner comprises horizontally disposed jet pipe, and described jet pipe arranges spout, and the jet pipe often organizing burner is parallel to each other; The burner group interval of furnace roller both sides is arranged; Each upper and lower burner group forms a combustion zone, is followed successively by 1-7 district from preheating section to linkage section, also arranges change of current fan at the top in 7th district.

2. Horizental annealer heating zone structure according to claim 1, it is characterized in that: arrange cooling structure in described furnace roller, described cooling structure comprises the circulation line in furnace roller, and described circulation line is connected with the water coolant outside body of heater.