阅读说明：本技术 一种rto炉电加热装置 (RTO stove electric heater unit ) 是由 冷泉芳 费海花 陆厚祥 余丹 彭宇凡 于 2021-09-16 设计创作，主要内容包括：本发明公开了一种RTO炉电加热装置。它包括电加热丝、陶瓷环以及框架,电加热丝往复盘绕并间隔排布在陶瓷环上并将陶瓷环固定安装在框架上,框架上设置有隔热区,隔热区外设置有对流散热的散热区,电加热丝的引出端连接有电极,电极上套有绝缘套并依次经过隔热区、散热区后并连接有接线箱。优点是,不但利用电加热丝的高功率,满足发热要求,保证了发热功率,而且通过陶瓷环绝缘隔离,使其隔离效果好,保证带电发热体与设备外壳之间的绝缘,另外,可以有效阻止电加热丝产生的热量向非工作区传递以及实现了最大程度上的对流散热的目的,阻止了炉内溢出的热量影响接线箱,从而大幅提高了使用寿命。(The invention discloses an electric heating device of an RTO furnace. The electric heating wire is coiled in a reciprocating mode, arranged on the ceramic ring at intervals and fixedly installed on the frame, provided with a heat insulation area, a heat dissipation area for convection heat dissipation is arranged outside the heat insulation area, the leading-out end of the electric heating wire is connected with an electrode, and an insulation sleeve is sleeved on the electrode, sequentially passes through the heat insulation area and the heat dissipation area and is connected with a junction box. The advantage is, not only utilize electric heating wire's high power, satisfy the requirement of generating heat, guaranteed the power of generating heat, keep apart through ceramic ring insulation moreover, make it keep apart effectually, guarantee the insulation between electrified heat-generating body and the equipment shell, in addition, can effectively prevent the heat that electric heating wire produced to the non-work area transmission and realize the radiating purpose of convection current in the at utmost, prevented the heat that overflows in the stove to influence the junction box to life has been improved by a wide margin.)

1. An RTO stove electric heater unit which characterized in that: including naked electric heating wire (1), the ceramic ring (2) that are used for carrying out the support to electric heating wire and be used for supporting fixed frame (3) to ceramic ring as the heat-generating body, electric heating wire (1) is reciprocal to be coiled and the interval is arranged on ceramic ring and with ceramic ring fixed mounting on frame (3), be provided with thermal-insulated district (4) that are located electric heating wire's the end one side of drawing forth on frame (3), thermal-insulated district (4) are provided with convection current radiating heat dissipation district (5) outward, the end of drawing forth of electric heating wire (1) is connected with electrode (7), and the cover has insulating cover (11) and is connected with junction box (6) after thermal-insulated district, heat dissipation district in proper order on electrode (7).

2. An RTO furnace electric heating apparatus according to claim 1, characterized in that: the ceramic ring (2) is fixedly arranged on the frame (3) through a mounting seat (8), a placement groove for separating the electric heating wires is formed in the ceramic ring, and the electric heating wires (1) are fixedly arranged on the ceramic ring through the placement groove.

3. An RTO furnace electric heating apparatus according to claim 1 or 2, characterized in that: the electric heating wire (1) is provided with a plurality of wires, and the heads and the tails of the electric heating wires (1) are connected to form a reciprocating coiling structure.

4. An RTO furnace electric heating apparatus according to claim 3, characterized in that: the heat insulation area (4) is provided with a heat insulation material used for preventing heat generated by the electric heating wire from being transferred to the non-working area.

5. An RTO furnace electric heating apparatus according to claim 1, 2 or 4, characterized in that: a plurality of radiating fins (9) arranged on the electrodes are arranged in the radiating area (5), and an airflow channel is formed between every two radiating fins.

6. An RTO furnace electric heating apparatus according to claim 5, characterized in that: and the frame (3) is provided with a mounting flange (10) positioned at the top of the heat insulation area.

Technical Field

The invention relates to an electric heating device for organic waste gas treatment equipment, in particular to an electric heating device for an RTO furnace.

Background

The RTO is a high-efficiency organic waste gas treatment device. RTO (Regenerative Thermal Oxidizer, RTO for short), Regenerative Thermal Oxidizer; the principle is that organic matters (VOCs) in the waste gas are oxidized into corresponding carbon dioxide and water at the high temperature of about 760 ℃, so that the waste gas is purified, the heat released during the decomposition of the waste gas is recovered, the three-chamber RTO waste gas decomposition efficiency reaches over 99 percent, the heat recovery efficiency reaches over 95 percent, and the RTO main body structure comprises a combustion chamber, a regenerator, a switching valve and the like. Compared with the traditional catalytic combustion and direct combustion thermal oxidation furnace (TO), the RTO furnace has the characteristics of high thermal efficiency (more than or equal TO 95 percent), low operation cost, capability of treating low-concentration waste gas in large air volume and the like, can also carry out secondary waste heat recovery when the concentration is slightly high, greatly reduces the production and operation cost, and can be applied more and more under the situation of higher and higher environmental protection requirements.

The RTO furnace uses an electric heating device, and the heating body of the electric heating device used by the current RTO furnace usually adopts a metal tubular electric heating element; the working temperature of the RTO furnace is kept at about 760 ℃, the surface temperature of the metal tubular electric heating element is about 1000 ℃, the metal tubular electric heating element generally cannot bear the high working temperature for a long time, and tube explosion failure can occur in the use process at the high temperature, so that the service life of the electric heater using the metal tubular electric heating element as a heating element is usually not more than one year, and the use requirement of a user cannot be met.

Disclosure of Invention

The invention aims to solve the technical problem of providing the electric heating device of the RTO furnace, which has simple structural design, high temperature tolerance, safety and reliability and can greatly prolong the service life.

In order to solve the technical problem, the electric heating device of the RTO furnace comprises an exposed electric heating wire serving as a heating body, a ceramic ring for supporting the electric heating wire and a frame for supporting and fixing the ceramic ring, wherein the electric heating wire is wound in a reciprocating manner and is arranged on the ceramic ring at intervals, the ceramic ring is fixedly arranged on the frame, a heat insulation area is arranged on one side of a leading-out end of the electric heating wire on the frame, a heat dissipation area for convection heat dissipation is arranged outside the heat insulation area, the leading-out end of the electric heating wire is connected with an electrode, and the electrode is sleeved with an insulation sleeve and sequentially passes through the heat insulation area and the heat dissipation area and is connected with a junction box.

The ceramic ring is fixedly arranged on the frame through the mounting seat, a placement groove for separating the electric heating wires is formed in the ceramic ring, and the electric heating wires are fixedly arranged on the ceramic ring through the placement groove.

The electric heating wires are provided with a plurality of electric heating wires, and the electric heating wires are connected end to form a reciprocating coiling structure.

The heat insulation area is provided with a heat insulation material used for preventing heat generated by the electric heating wire from being transferred to the non-working area.

A plurality of radiating fins arranged on the electrodes are arranged in the radiating area, and an airflow channel is formed between each radiating fin.

And the frame is provided with a mounting flange positioned at the top of the heat insulation area.

After the structure is adopted, the structure is simple and reasonable, the installation is very convenient, particularly, the structure design is ingenious, the ceramic ring is directly adopted to support and isolate the electric heating wire replacing the metal pipe, the high power of the electric heating wire is utilized, the heating requirement is met, the heating power is ensured, the ceramic ring is insulated and isolated, the isolation effect is good, the insulation between an electric heating body and an equipment shell is ensured, in addition, the arranged heat insulation area can effectively prevent the heat generated by the electric heating wire from being transferred to a non-working area, the purpose of maximum convection heat dissipation is realized by the arranged heat dissipation area, the heat overflowing in the furnace is prevented from influencing a junction box, the service life is greatly prolonged, and the technical problem that the service life of an RTO furnace electric heating device made of the metal tubular electric heating element cannot meet the requirement is effectively solved.

Drawings

FIG. 1 is a schematic front view of an electric heating device of an RTO furnace according to the present invention;

FIG. 2 is a schematic diagram of a side view of an electric heating device of the RTO furnace of the present invention.

Detailed Description

The electric heating device of the RTO furnace of the present invention will be described in further detail with reference to the accompanying drawings and the detailed description.

As shown in the figure, the electric heating device of the RTO furnace comprises a naked electric heating wire 1 as a heating body, a ceramic ring 2 for supporting the electric heating wire and a frame 3 for supporting and fixing the ceramic ring, wherein the naked electric heating wire is adopted (the electric heating wire is not only limited to a thin wire with a small sectional area, but also can be called as an electric heating rod when the sectional area of the electric heating wire reaches a certain degree), the temperature resistance of the electric heating wire is not lower than 1200 ℃, the electric heating wire is far higher than the limit temperature resistance of a metal tubular electric heating element, the electric heating wire has good oxidation resistance, and the risk of tube explosion failure of the metal tubular electric heating element is avoided, so that the electric heating wire 1 can be used for generating heat after being electrified in the device to replace the metal tubular electric heating element, the electric heating wire 1 is repeatedly coiled and arranged on the ceramic ring at intervals and the ceramic ring is fixedly arranged on the frame 3, the ceramic ring with good high-temperature performance is used for supporting and insulating the exposed electric heating wire (rod), and simultaneously ensuring the insulation between the electric heating body and the equipment shell, the frame can be made of heat-resistant metal materials, the heat insulation area 4 positioned on one side of the leading-out end of the electric heating wire is arranged on the frame 3, the heat dissipation area 5 for heat convection is arranged outside the heat insulation area 4, the leading-out end of the electric heating wire 1 is connected with an electrode 7, an insulation sleeve 11 is sleeved on the electrode 7 and sequentially passes through the heat insulation area and the heat dissipation area and is connected with a junction box 6, and the electrode passes through the heat insulation area and the heat dissipation area and is then connected with the junction box 6, so that the heat insulation area is ingeniously utilized to prevent heat transfer and convection heat dissipation of the heat dissipation area, and the influence of heat overflowing from the furnace on the junction box is prevented.

Furthermore, the ceramic ring 2 is fixed on the frame 3 through a mounting seat 8, a placing groove for separating the electric heating wire is arranged on the ceramic ring, the electric heating wire 1 is fixed on the ceramic ring through the placing groove, the heat insulation area 4 is provided with a heat insulation material for preventing the heat generated by the electric heating wire from being transferred to the non-working area, a plurality of radiating fins 9 arranged on the electrode are arranged in the radiating area 5, and an air flow channel is formed between the radiating fins, so that a convection radiating channel is formed.

Furthermore, the electric heating wires 1 are provided with a plurality of electric heating wires, the electric heating wires 1 are connected end to form a reciprocating coiling structure, and the electric heating wires connected end to end form the reciprocating coiling structure, so that the electric heating wire is easy to process and manufacture and convenient to install.

Still further, a mounting flange 10 at the top of the insulation zone may also be provided on the frame 3.

It is to be understood that the above description is not intended to limit the present invention, and the present invention is not limited to the above examples, and those skilled in the art may make modifications, alterations, additions or substitutions within the spirit and scope of the present invention.