Parallel heating device for improving temperature uniformity of roller kiln

Abstract

The utility model discloses a parallel heating device for improving the temperature uniformity of a roller kiln, which solves the problem of non-uniformity of the internal temperature of the existing roller kiln, and is characterized in that the heating device is formed by respectively arranging a middle heating element and two side heating elements above and below a roller way (5) in a kiln cavity, the heating elements in each layer are uniformly arranged at intervals in the length direction of the furnace body, and the heating elements in the upper layer and the lower layer are uniformly arranged in a staggered manner. The device has the advantages of uniform temperature in the furnace, energy conservation and consumption reduction in production, improved working efficiency, improved product quality and the like, and has good popularization and application values.

Description

Technical Field

[0001] The utility model belongs to auxiliary thermal equipment of an electric heating roller kiln body, and relates to a parallel heating device for improving the temperature uniformity of the roller kiln. Background Art

[0002] Due to the obstruction of the materials on the rollers during normal operation of the roller kiln, most of the airflow entering the kiln from the bottom passes through the gap between the side walls and the materials and flows to the upper space inside the kiln. This results in the temperature near the side walls in the cross-sectional direction of the kiln being lower than that in the middle. Therefore, the shortcomings of traditional electric heating roller kilns are:

[0003] 1. The roller kiln heats the kiln by installing several electric heating rods on the top and bottom of the rollers. The main kiln relies on radiation for heat transfer, so the temperature will be lower at places far away from the heating rods.

[0004] 2. In order to meet the process requirements, process air will be introduced into the roller kiln. Most of the air intake methods adopt "bottom air intake + side wall air intake". During the production process, due to the obstruction of the airflow by the materials on the rollers, the air flow velocity near the side wall of the kiln body will be large, and the flow velocity in the middle area will be small. At the same time, in order to avoid heat dissipation, the overall temperature distribution in the kiln body shows a high temperature in the middle and a low temperature around it. Utility Model Content

[0005] The purpose of the utility model is to provide an electric heating device for improving the temperature uniformity of a roller kiln, which can achieve uniform temperature in the furnace, energy saving and consumption reduction in production, improved work efficiency and enhanced product quality.

[0006] The technical solution of this utility model comprises a metal frame, kiln walls, a kiln roof, a kiln floor, rollers, and a heating device. The heating device comprises a central heating element and two side heating elements, respectively arranged above and below the rollers within the kiln cavity. Two heating elements are evenly spaced on each layer along the length of the kiln, and the heating elements on the upper and lower layers are staggered and evenly arranged.

[0007] Furthermore, the heating elements of the heating device are composed of ceramic rods and heating wires, etc. The middle heating element is a first ceramic rod that is inserted across the kiln cavity and into the inner walls of the kiln walls on both sides, and the heating elements on both sides are a second ceramic rod that is inserted across the kiln cavity and into the inner walls of the kiln walls on both sides, and the heating wires II are wrapped around the two sides of the second ceramic rod.

[0008] The beneficial effects of this utility model are as follows: due to the segmented arrangement of the heating wires on the heating elements, and the staggered and evenly distributed arrangement of two different types of heating elements above and below the rollers within the kiln cavity, heating in the central area is reduced, and the overall temperature distribution uniformity within the kiln cavity is significantly improved, thereby enhancing the overall temperature uniformity within the kiln cavity. This has the advantages of uniform furnace temperature, energy-saving and consumption-reducing production, improved work efficiency, and enhanced product quality. It can be widely used in roller kilns to improve temperature uniformity within the kiln.

[0009] The present invention will be further described below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0011] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model in the width direction;

[0012] Figure 3 It is a schematic diagram of the cross-sectional structure in the longitudinal direction of the utility model.

[0013] In the figure: 1 is a metal frame, 2 is a kiln wall, 3 is a kiln roof, 4 is a kiln bottom, 5 is a roller, 6 is a first ceramic rod, 7 is a second ceramic rod, 8 is a heating wire I, 9 is a heating wire II, and 10 is a material. DETAILED DESCRIPTION

[0014] like Figure 1 、 Figure 2 、 Figure 3As shown, the parallel heating device for improving the temperature uniformity of the roller kiln comprises a metal frame 1, a kiln wall 2, a kiln roof 3, a kiln bottom 4, a roller 5 and a heating device, etc., the heating device is arranged above and below the roller 5 in the kiln cavity, the two kinds of heating elements are arranged uniformly in the length direction of the furnace body, and the upper and lower heating elements are arranged uniformly. The heating element of the heating device is composed of a ceramic rod and an electric heating wire, the middle heating element is wound with an electric heating wire I 8 in the middle part of the first ceramic rod 6 inserted into the inner wall of the two side kiln walls 2, and the two side heating elements are wound with an electric heating wire II 9 in the two side parts of the second ceramic rod 7 inserted into the inner wall of the two side kiln walls 2. When the utility model is implemented, during the operation of the roller kiln, process gas is introduced into the kiln, the gas inlet mode of "bottom inlet + side wall inlet" is adopted, and due to the blockage of the material on the roller to the airflow during production, the airflow velocity near the inner side wall of the kiln body is large, and the airflow velocity in the middle region is small. The arrangement of the middle heating element and the two side heating elements is staggered and uniformly distributed, and the heating in the middle region can be reduced through group control, so that the overall temperature distribution uniformity in the kiln body is greatly improved, the kiln temperature is uniform, the production energy consumption is reduced, the work efficiency is improved, the product quality is improved, and the like. The utility model can be widely applied to the roller kiln to improve the temperature uniformity in the kiln.

[0015] The above is only a detailed description of the specific embodiments of the utility model, but the structural characteristics of the utility model are not limited to this, any person skilled in the art in the field of the utility model makes changes or modifications, which are covered in the utility model patent range.

Claims

1. A parallel heating device for improving the temperature uniformity of a roller kiln, comprising a metal frame (1), a kiln wall (2), a kiln top (3), a kiln bottom (4), rollers (5) and a heating device, characterized in that: The heating device comprises a middle heating element and two side heating elements which are respectively arranged above and below the roller (5) inside the kiln cavity. In the length direction of the furnace body, each layer of heating elements adopts two types of heating elements which are evenly spaced from each other, and the heating elements of the upper and lower layers are evenly staggered.

2. The parallel heating device for improving the temperature uniformity of a roller kiln according to claim 1, characterized in that: The heating elements of the heating device are composed of a ceramic rod and a heating wire. The middle heating element is a first ceramic rod (6) that is inserted into the inner walls of the kiln walls (2) on both sides and is wound with a heating wire I (8). The side heating elements are a second ceramic rod (7) that is inserted into the inner walls of the kiln walls (2) on both sides and is wound with a heating wire II (9).

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