阅读说明：本技术 一种直热式电加热竖窑炉 (Directly-heated type electric heating shaft kiln ) 是由 陈漪恺 陈来祥 于 2020-08-24 设计创作，主要内容包括：本发明涉及一种直热式电加热竖窑炉。所述直热式电加热竖窑炉包括：炉体、供电系统和高温耐热电极系统。所述高温耐热电极系统与所述待加热物料形成电流回路,所述待加热物料因自身存在电阻值,在电流通过所述待加热物料时,所述待加热物料进行自加热。通过采用高温耐热电极系统与待加热物料形成电流回路,待加热物料因自身存在电阻值,在电流通过待加热物料后,待加热物料进行自加热,以适应物料自身发热的要求,进而有效地改善了电加热的综合热效率,在缩短物料加热时间的同时,提高了加热效率和生产效率。(The invention relates to a direct-heating type electric heating vertical kiln. The direct-heating type electric heating vertical kiln comprises: the furnace body, power supply system and high temperature resistant hot electrode system. The high-temperature heat-resistant electrode system forms a current loop with the material to be heated, and the material to be heated self-heats when current passes through the material to be heated due to the resistance of the material to be heated. The current loop is formed by the high-temperature heat-resistant electrode system and the material to be heated, the material to be heated has a resistance value, and after the current passes through the material to be heated, the material to be heated is self-heated to adapt to the self-heating requirement of the material, so that the comprehensive heat efficiency of electric heating is effectively improved, the material heating time is shortened, and the heating efficiency and the production efficiency are improved.)

1. A direct-heating type electric heating vertical kiln is characterized by comprising: the device comprises a furnace body, a power supply system and a high-temperature heat-resistant electrode system;

the high-temperature heat-resistant electrode system is arranged in the furnace body;

the power supply system is connected with the high-temperature heat-resistant electrode system;

the high-temperature heat-resistant electrode system and the material to be heated form a current loop, and the material to be heated has a resistance value, so that the material to be heated is self-heated after current passes through the material to be heated.

2. The direct heat electric heating shaft kiln as recited in claim 1, wherein the high temperature heat resistant electrode system comprises: a first high temperature refractory electrode unit and a second high temperature refractory electrode unit; the first high-temperature heat-resistant electrode unit is attached to and arranged on a first inner surface of the furnace body hearth; the second high-temperature heat-resistant electrode unit is attached to and arranged on the second inner surface of the furnace body hearth; the first high temperature heat-resistant electrode unit and the second high temperature heat-resistant electrode unit are symmetrically arranged.

3. The direct heat electric heating shaft kiln as recited in claim 2, wherein the high temperature heat resistant electrode system further comprises: the first high-temperature-resistant insulating lining body and the second high-temperature-resistant insulating lining body;

the first high-temperature-resistant insulating lining body is attached to and arranged on the third inner surface of the furnace body hearth; the second high-temperature-resistant insulating lining body is attached to the fourth inner surface of the furnace body hearth; the first high-temperature-resistant insulating lining body and the second high-temperature-resistant insulating lining body are symmetrically arranged;

and the second high-temperature-resistant insulating lining body and the second high-temperature-resistant electrode unit are fixed in a closed loop manner to form a material placing space for placing materials to be heated.

4. The direct heat electric heating shaft kiln as recited in claim 2, wherein the power supply system comprises: a first power supply unit and a second power supply unit;

the first power supply unit is connected with the first high-temperature heat-resistant electrode unit; the second power supply unit is connected with the second high-temperature heat-resistant electrode unit.

5. The direct-heating electric vertical kiln according to claim 1, further comprising: a protection channel;

and the power supply system is connected with the high-temperature heat-resistant electrode system through the protection channel.

6. The direct-heating type electric heating shaft kiln as claimed in claim 5, wherein the material of the protection channel is a heat-resistant insulating material or a heat-insulating material.

7. The direct-heating electric vertical kiln according to claim 1, further comprising: a temperature measurement control system;

the temperature measurement control system is arranged on the outer side of the furnace body; the temperature measurement control system is used for adjusting heating electric power and heating time in real time according to the temperature of the material to be heated.

8. The direct-heating electric heating shaft kiln as claimed in claim 7, wherein the temperature measurement control system comprises a thermocouple, a signal transmitter and an electric control cabinet;

the thermocouple is used for detecting the temperature of the material to be heated in the furnace body hearth; the signal transmitter is used for transmitting the temperature signal detected by the thermocouple to the electrical control cabinet; the electric control cabinet is used for setting heating temperature according to the material to be heated and setting heating electric power and heating time according to the temperature signal.

Technical Field

The invention relates to the field of electric heating kilns, in particular to a directly-heated electric heating vertical kiln.

Background

The shaft furnace (kiln) is one of the furnaces for heating materials in the industries of metallurgy, chemical industry, building and the like, and the heating mode of the shaft furnace (kiln) is divided into external heating and internal heating according to the heating position of a heat source.

Among them, the external heating shaft kiln generally uses metal material for heat transfer, but the metal material is easily damaged by oxidation because it is heated and heat transferred for a long time. The heating temperature of the external heating mode is limited by the metal material of the furnace body, the maximum using temperature is generally lower (generally less than 950 ℃), and the heat efficiency of heat transfer through the furnace body is also low, so that the external heating mode shaft furnace is hardly adopted.

The internal heating shaft furnace is generally heated by gas, fuel oil, coal or coal gasification, and air or oxygen is introduced, so that the heated material has certain oxidation resistance and the pollution requirement on fuel is not high, such as a lime shaft kiln and a cement clinker shaft kiln. If the material to be heated is a material which is easily oxidized, such as an alloy, a metal material, etc., it is necessary to heat the material by other heating means (e.g., electric heating). However, the prior art does not have an internal heating type shaft furnace which can adopt an electric heating mode for heating.

In summary, the existing shaft furnaces are all internal heating type, and the heat source is mainly provided by fuel gas, fuel oil, coal or coal gasification and the like. When the shaft furnace is used for heating easily-oxidized materials, a reducing atmosphere needs to be provided in a hearth, so that the application range of the shaft furnace is greatly limited.

Based on the existing shaft furnace (kiln), the problems that the structure is complex, when the shaft furnace adopts fuel such as gas, fuel oil, coal or coal gasification to heat materials, the easily oxidized materials need to be ensured to be in a reducing atmosphere or under a vacuum condition, and a large amount of smoke generated during heating of the gas and the like takes away a large amount of heat, so that the heat efficiency is low and the environmental pollution is serious exist.

Accordingly, there is a need in the art to provide an electrically heated shaft kiln having a simple structure to solve the above-mentioned problems in the prior art.

Disclosure of Invention

The invention aims to provide a direct-heating type electric heating vertical kiln to solve the problems of low heating efficiency and complex kiln structure in the prior art.

In order to achieve the purpose, the invention provides the following scheme:

a direct-heating electric-heating vertical kiln, comprising: the device comprises a furnace body, a power supply system and a high-temperature heat-resistant electrode system;

the high-temperature heat-resistant electrode system is arranged in the furnace body;

the power supply system is connected with the high-temperature heat-resistant electrode system;

the high-temperature heat-resistant electrode system and the material to be heated form a current loop, and the material to be heated has a resistance value, so that the material to be heated is self-heated after current passes through the material to be heated.

Preferably, the high temperature and heat resistant electrode system comprises: a first high temperature refractory electrode unit and a second high temperature refractory electrode unit; the first high-temperature heat-resistant electrode unit is attached to and arranged on a first inner surface of the furnace body hearth; the second high-temperature heat-resistant electrode unit is attached to and arranged on the second inner surface of the furnace body hearth; the first high temperature heat-resistant electrode unit and the second high temperature heat-resistant electrode unit are symmetrically arranged.

Preferably, the high temperature and heat resistant electrode system further comprises: the first high-temperature-resistant insulating lining body and the second high-temperature-resistant insulating lining body;

the first high-temperature-resistant insulating lining body is attached to and arranged on the third inner surface of the furnace body hearth; the second high-temperature-resistant insulating lining body is attached to the fourth inner surface of the furnace body hearth; the first high-temperature-resistant insulating lining body and the second high-temperature-resistant insulating lining body are symmetrically arranged;

the first high-temperature-resistant insulating lining body, the first high-temperature-resistant electrode unit, the second high-temperature-resistant insulating lining body and the second high-temperature-resistant electrode unit are fixed in a closed loop mode, and a material placing space for placing materials to be heated is formed.

Preferably, the power supply system includes: a first power supply unit and a second power supply unit;

the first power supply unit is connected with the first high-temperature heat-resistant electrode unit; the second power supply unit is connected with the second high-temperature heat-resistant electrode unit.

Preferably, the direct-heating type electric heating vertical kiln further comprises: a protection channel;

and the power supply system is connected with the high-temperature heat-resistant electrode system through the protection channel.

Preferably, the material of the channel is heat-resistant insulating material or heat-insulating material.

Preferably, the direct-heating type electric heating vertical kiln further comprises: a temperature measurement control system;

the temperature measurement control system is arranged on the outer side of the furnace body; the temperature measurement control system is used for adjusting heating electric power and heating time in real time according to the temperature of the material to be heated.

Preferably, the temperature measurement control system comprises a thermocouple, a signal transmitter and an electrical control cabinet;

the thermocouple is used for detecting the temperature of the material to be heated in the furnace body hearth; the signal transmitter is used for transmitting the temperature signal detected by the thermocouple to the electrical control cabinet; the electric control cabinet is used for setting heating temperature according to the material to be heated and setting heating electric power and heating time according to the temperature signal.

According to the specific embodiment provided by the invention, the invention discloses the following technical effects:

according to the direct-heating type electric heating vertical kiln provided by the invention, the high-temperature heat-resistant electrode system and the material to be heated form a current loop, and the material to be heated has a resistance value, so that the material to be heated is self-heated after current passes through the material to be heated, the self-heating requirement of the material is met, the comprehensive thermal efficiency of electric heating is effectively improved, the heating time of the material is shortened, and the heating efficiency and the production efficiency are improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.

FIG. 1 is a schematic structural view of a direct-heating type electric heating shaft kiln provided by the invention;

FIG. 2 is a schematic structural diagram of a square hearth of a directly-heated electric heating vertical kiln provided by the embodiment of the invention;

FIG. 3 is a schematic structural diagram of a rectangular hearth of the direct-heating type electric heating vertical kiln provided by the embodiment of the invention;

fig. 4 is a schematic structural diagram of a circular hearth of the direct-heating type electric heating vertical kiln provided by the embodiment of the invention.

Description of the symbols:

the furnace comprises a furnace body shell 1, a furnace body heat-preservation and heat-insulation layer 2, a high-temperature-resistant heat-preservation baffle plate 3, a power supply protection lining 4, a high-temperature wear-resistant lining plate 5, a furnace body discharging system 6, a power supply system 7, a furnace body feeding system 8, a temperature measurement control system 9, a high-temperature-resistant heat-resistant electrode system 10, a first high-temperature-resistant heat-resistant electrode unit 10-1, a first high-temperature-resistant insulating lining body 10-2, a second high-temperature-resistant heat-resistant electrode unit 10-3 and a second high-temperature-.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The invention aims to provide a direct-heating type electric heating vertical kiln to solve the problems of low heating efficiency and complex kiln structure in the prior art.

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

Fig. 1 is a schematic structural view of a direct-heating type electric heating vertical kiln provided by the invention, which comprises: a furnace body (only a furnace body shell 1 is shown in figure 1, and the specific structure of the furnace body shell is not shown), a power supply system 7 and a high-temperature heat-resistant electrode system 10.

The high-temperature heat-resistant electrode system 10 is arranged in the furnace body.

The power supply system 7 is connected with the high-temperature heat-resistant electrode system 10.

The high temperature heat-resistant electrode system 10 forms a current loop with the material to be heated, which has a resistance value by itself, and self-heats the material after the current passes through the material to be heated.

Wherein, the furnace body comprises a furnace body shell 1, a furnace body heat preservation and insulation layer 2 and a high temperature resistant heat preservation clapboard 3.

Preferably, as shown in fig. 2 to 4, the high temperature and heat resistant electrode system 10 includes: a first high temperature refractory electrode unit 10-1 and a second high temperature refractory electrode unit 10-3. The first high-temperature heat-resistant electrode unit 10-1 is attached to the first inner surface of the furnace body hearth. The second high-temperature heat-resistant electrode unit 10-3 is attached to the second inner surface of the furnace body hearth. The first high temperature heat-resistant electrode unit 10-1 and the second high temperature heat-resistant electrode unit 10-3 are symmetrically disposed.

Wherein the high-temperature heat-resistant electrode unit comprises two or more groups of high-temperature heat-resistant electrodes.

Preferably, the high temperature and heat resistant electrode system 10 further includes: a first high temperature resistant insulating liner 10-2 and a second high temperature resistant insulating liner 10-4.

The first high-temperature-resistant insulating lining body is attached to and arranged on the third inner surface of the furnace body hearth; the second high-temperature-resistant insulating lining body is attached to the fourth inner surface of the furnace body hearth; the first high-temperature-resistant insulating lining body and the second high-temperature-resistant insulating lining body are symmetrically arranged.

The first high-temperature resistant insulating lining body 10-2, the first high-temperature resistant electrode unit 10-1, the second high-temperature resistant insulating lining body 10-4 and the second high-temperature resistant electrode unit 10-3 are fixed in a closed loop mode, and a material placing space for placing materials to be heated is formed.

Preferably, the power supply system 7 includes: a first power supply unit and a second power supply unit.

The first power supply unit is connected to the first high temperature and heat-resistant electrode unit 10-1. The second power supply unit is connected to the second high temperature and heat resistant electrode unit 10-3.

Preferably, the above direct-heating type electric heating vertical kiln further comprises: the channel is protected.

The power supply system 7 is connected with the high-temperature heat-resistant electrode system 10 through the protection channel.

Preferably, the material of the protection channel is a heat-resistant insulating material or a heat-insulating material.

Preferably, the direct-heating type electric heating vertical kiln further comprises: and a temperature measurement control system 9.

The temperature measurement control system 9 is arranged outside the furnace body. The temperature measurement control system 9 is used for adjusting heating electric power and heating time in real time according to the temperature of the material to be heated.

Preferably, the temperature measurement control system 9 comprises a thermocouple, a signal transmitter and an electrical control cabinet. The thermocouple used in the present invention is preferably a platinum-platinum rhodium thermocouple.

The thermocouple is used for detecting the temperature of the material to be heated in the hearth of the furnace body. The signal transmitter is used for transmitting the temperature signal detected by the thermocouple to the electrical control cabinet. The electric control cabinet is used for setting heating temperature according to the material to be heated and setting heating electric power and heating time according to the temperature signal.

In addition, the direct-heating type electric heating vertical kiln provided by the invention also comprises a furnace body feeding system 8 and a furnace body discharging system 6. Wherein, furnace body charge-in system 8 includes conveyer belt, hopper and bell. The furnace body discharging system 6 comprises a conveying belt, a flashboard, a thimble and a hydraulic device.

Further, because the heating materials are different, the set heating temperatures are different, and the required furnace atmospheres are different, the selection of each part in the direct-heating type electric heating shaft kiln provided by the invention is as follows:

1. the temperature measuring device or device in the temperature measuring control system is selected according to the highest temperature which can be reached by heating the hearth.

2. The high temperature heat-resistant electrode is selected according to the heating temperature of the material itself to be heated.

3. And selecting the high-temperature-resistant heat-insulating partition plate 3 according to the highest temperature capable of being born in the hearth.

4. The shape and size of the furnace is selected according to the material characteristics and shape and the heat transfer efficiency.

5. The furnace atmosphere is selected according to the atmosphere required by heating the material, such as reducing atmosphere, oxidizing atmosphere, vacuum, non-vacuum and the like.

The direct-heating type electric heating shaft kiln provided by the invention is explained by taking hearths with different shapes as an example.