WO2021120801A1 - Microwave and gas-fired hybrid heating roller kiln - Google Patents

Microwave and gas-fired hybrid heating roller kiln Download PDF

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Publication number
WO2021120801A1
WO2021120801A1 PCT/CN2020/120617 CN2020120617W WO2021120801A1 WO 2021120801 A1 WO2021120801 A1 WO 2021120801A1 CN 2020120617 W CN2020120617 W CN 2020120617W WO 2021120801 A1 WO2021120801 A1 WO 2021120801A1
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WIPO (PCT)
Prior art keywords
heating
section
microwave
roller kiln
heating section
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PCT/CN2020/120617
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French (fr)
Chinese (zh)
Inventor
潘建环
陈水福
肖锋
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科达制造股份有限公司
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Publication of WO2021120801A1 publication Critical patent/WO2021120801A1/en

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
    • F27B9/062—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated electrically heated
    • F27B9/067—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated electrically heated heated by induction
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/06—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated
    • F27B9/10—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity heated without contact between combustion gases and charge; electrically heated heated by hot air or gas
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/30—Details, accessories, or equipment peculiar to furnaces of these types
    • F27B9/36—Arrangements of heating devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
    • F27D17/004—Systems for reclaiming waste heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B9/00—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity
    • F27B9/12—Furnaces through which the charge is moved mechanically, e.g. of tunnel type; Similar furnaces in which the charge moves by gravity with special arrangements for preheating or cooling the charge
    • F27B2009/124—Cooling
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the invention relates to the technical field of heating equipment, in particular to a microwave and gas mixed heating roller kiln.
  • the roller kiln is mainly used for the firing of ceramic products such as ceramic tiles, house exterior wall tiles, interior wall tiles and floor tiles; the roller kiln uses rotating rollers as the carrier of the green body, and the ceramic products are placed on many closely spaced rollers. On the top, the ceramics are transferred from the kiln head to the kiln end by the rotation of the rollers, so it is called a roller kiln.
  • the traditional gas roller kiln heats the product by using gas to heat the ambient air and then the ambient air to heat the product; during the heating process, the surface of the product is in direct contact with the hot air, and all the heat inside the product is conducted through the surface of the product; therefore, The temperature rise inside the product is much slower than the surface of the product.
  • the purpose of the present invention is to provide a microwave and gas mixed heating roller kiln, which can further shorten the firing of products even when heating products with large volume and thickness or when the thermal conductivity of the heated products is not good. Cycle and increase production.
  • a microwave and gas mixed heating roller kiln which includes:
  • the roller kiln body includes a first heating section and a second heating section connected in sequence;
  • the first heating section is provided with a gas heating device
  • the second heating section is provided with a microwave heating device.
  • the heating section in the roller kiln body is divided into first and second heating sections connected in sequence, and a gas heating device is installed in the first heating section, and the second heating section is A microwave heating device is installed in the heating section; when the product enters the roller kiln body, it first passes through the first heating section. The air heated by the gas heating device in the first heating section heats the outer surface of the product, and then the product passes through the second heating section. The microwave emitted by the microwave heating device makes the inside of the product heat up quickly.
  • the present invention By combining the two methods of gas heating and microwave heating, the present invention not only retains the advantages of low gas unit calorific value cost and strong microwave penetration, but also relatively overcomes their own shortcomings, thereby greatly shortening the firing cycle of the product. Further increase the output per unit time.
  • the distance between the two ends of the second heating section and the microwave heating device is greater than the distance required for the microwaves emitted by the microwave heating device to attenuate to a safe value.
  • the distance between the two ends of the second heating section and the microwave heating device is greater than the distance required for the microwave emitted by the microwave heating device to attenuate to a safe value, so that there is no need to set up between the first and second heating sections.
  • the tent used to shield the microwave can also ensure the safety of the operators.
  • the inner wall of the second heating section is provided with a microwave shielding material.
  • microwave and gas mixed heating roller kiln further includes a flue gas waste heat recovery device
  • the flue gas waste heat recovery device includes a first air duct connected to the first heating section, and a fan for drawing the flue gas of the first heating section to the first air duct.
  • first air pipe is connected to the front end of the first heating section, and is used to guide the flue gas in the first heating section to flow in a direction away from the second heating section.
  • the present invention connects the first air pipe to the front end of the first heating section, so that the flue gas in the first heating section flows to the front end of the first heating section, that is, away from the second heating section, thereby avoiding gas heating Excessive flue gas flows into the second heating section, causing damage to the microwave heating device.
  • roller kiln body further includes a heat preservation section, and a gas heating device is provided in the heat preservation section;
  • the first heating section, the second heating section and the heat preservation section are connected in sequence.
  • the flue gas waste heat recovery device further includes a second air pipe connected to the heat preservation section and the fan at both ends;
  • the second air pipe is connected to the rear end of the heat preservation section, and is used to guide the flue gas in the heat preservation section to flow in a direction away from the second heating section.
  • the microwave and gas mixed heating roller kiln further includes a combustion-supporting air device
  • the combustion-supporting air device and the flue gas waste heat recovery system are connected through a heat exchanger, and the heat in the flue gas waste heat recovery system is used to heat the combustion-supporting air device through the heat exchanger.
  • the roller kiln body further includes a cooling section connected with a cooling air device, and the cooling air device is used to generate a low-temperature or normal-temperature wind flow, which is blown into the cooling section ;
  • the first heating section, the second heating section, the heat preservation section and the cooling section are connected in sequence.
  • the microwave and gas mixed heating roller kiln further includes a roller conveying device arranged in the body of the roller kiln.
  • Figure 1 is a schematic diagram of the front part of the microwave and gas mixed heating roller kiln according to an embodiment of the present invention
  • FIG. 2 is a cross-sectional view of the second heating section of the microwave and gas mixed heating roller kiln according to the embodiment of the present invention
  • Figure 3 is a schematic diagram of the rear part of the microwave and gas mixed heating roller kiln according to the embodiment of the present invention.
  • a microwave and gas mixed heating roller kiln includes:
  • the roller kiln body 100 includes a first heating section 110 and a second heating section 120 connected in sequence;
  • the first heating section 110 is provided with a gas heating device
  • the second heating section 120 is provided with a microwave heating device.
  • the microwave and gas mixed heating roller kiln further includes a roller conveying device 200 arranged in the roller kiln body 100.
  • the structure of the gas heating device is basically the same as that of the prior art. Its combustion chamber is under the roller conveyor. Compressed air is used to atomize natural gas, heavy oil, diesel and other fuels to burn to generate high temperature, thereby reducing the heat in the first heating section. Air heating; and between the combustion chamber and the roller, there is refractory material isolation, the flame does not directly contact the burned product.
  • the microwave heating device includes a microwave generating source assembly 300; preferably, the microwave generating source assembly 300 is arranged on the top of the second heating section 120, and the product passing through the second heating section 120 from top to bottom Microwaves are emitted.
  • the inner wall of the second heating section 120 is provided with a microwave shielding material 400 to prevent microwaves from leaking from the side walls and top of the roller kiln body.
  • the roller conveying device at the bottom of the second heating section has both ends of each roller enclosed in a metal cover to prevent microwaves from leaking from the roller conveying device.
  • the heating section in the roller kiln body is divided into first and second heating sections connected in sequence, and a gas heating device is installed in the first heating section.
  • the second heating section is equipped with a microwave heating device; when the product enters the roller kiln body, it first passes through the first heating section.
  • the air heated by the gas heating device in the first heating section heats the outer surface of the product, and then the product passes through the second heating section ,
  • the microwave emitted by the microwave heating device makes the inside of the product heat up quickly.
  • the present invention By combining the two methods of gas heating and microwave heating, the present invention not only retains the advantages of low gas unit calorific value cost and strong microwave penetration, but also relatively overcomes their own shortcomings, thereby greatly shortening the firing cycle of the product. Further increase the output per unit time.
  • the distance between the two ends of the second heating section 120 and the microwave heating device is greater than the distance required for the microwaves emitted by the microwave heating device to attenuate to a safe value.
  • the distance between the two ends of the second heating section and the microwave heating device is greater than the distance required for the microwaves emitted by the microwave heating device to attenuate to a safe value, so that there is no need for the distance between the first and second heating sections. Setting up a tent for shielding microwaves can also ensure the safety of operators.
  • the temperature of the first and second heating sections will not be too different. Therefore, after the product enters the second heating section from the first heating section, its outer surface will not It is cooled by the air in the second heating section.
  • the microwave and gas mixed heating roller kiln further includes a flue gas waste heat recovery device 500;
  • the flue gas waste heat recovery device 500 includes a first air duct 510 connected to the first heating section 110, and a fan 530 for drawing the flue gas of the first heating section 110 to the first air duct 510 .
  • the first air pipe is connected to the front end of the first heating section, so that the flue gas in the first heating section flows toward the front end of the first heating section, that is, away from the second heating section, thereby avoiding gas Excessive flue gas generated by heating flows into the second heating section, causing damage to the microwave heating device.
  • the roller kiln body 100 further includes a heat preservation section 130, and a gas heating device is provided in the heat preservation section 130;
  • the first heating section 110, the second heating section 120 and the heat preservation section 130 are connected in sequence.
  • the setting of the heat preservation section is the same as that of the first heating section, except that the heating power of the gas heating device is slightly lower than the power of the gas heating device in the first heating section.
  • the flue gas waste heat recovery device 500 further includes a second air pipe 520 connected to the heat preservation section 130 and the fan 530 at both ends;
  • the second air pipe 520 is connected to the rear end of the heat preservation section 130 and is used to guide the flue gas in the heat preservation section 130 to flow in a direction away from the second heating section 120.
  • the microwave and gas mixed heating roller kiln further includes a combustion-supporting wind device 600, which is used to provide combustion-supporting wind to the gas heating device at the bottom of the first heating section 110 and the heat preservation section 130;
  • the combustion air device 600 and the flue gas waste heat recovery device 500 are connected through a heat exchanger 700, and the heat in the flue gas waste heat recovery system is used to preheat the combustion air in the combustion air device through the heat exchanger.
  • the roller kiln body further includes a cooling section, and the cooling section is connected with a cooling air device 800, and the cooling air device 800 is used to generate a low-temperature or normal-temperature wind flow, which is blown into the cooling section;
  • the first heating section 110, the second heating section 120, the heat preservation section 130 and the cooling section are connected in sequence.
  • the cooling section includes a rapid cooling section 140 and a slow cooling section 150. Both the rapid cooling section 140 and the slow cooling section 150 are provided with cold air by the cooling air device 800. The difference is that the wind speed at the outlet of the cooling air device in the rapid cooling section is The wind speed of the air outlet in the slow cooling section is different, or the temperature of the cold air provided to the rapid cooling section and the slow cooling section is different.
  • first heating section 110, the second heating section 120, the heat preservation section 130, the rapid cooling section 140, and the slow cooling section 150 are connected by a conductive sealing ring; in addition, a conductive seal can also be used.
  • Objects such as silica gel and conductive graphite packing connect each section.

Abstract

A microwave and gas-fired hybrid heating roller kiln, a roller kiln body (100) thereof comprising a first heating section (110) and a second heating section (120) connected in sequence, where a gas-fired heating apparatus is provided in the first heating section (110), and a microwave heating apparatus is provided in the second heating section (120). With the gas-fired heating apparatus provided in the first heating section (110) and the microwave heating apparatus provided in the second heating section (120), when a product is passed through the first heating section (110), a temperature increase is brought forth to the outer surface of the product being heated by hot air in the first heating section (110), the product is then passed through the second heating section (120), and a rapid temperature increase is brought forth to the interior of the product by a microwave emitted by the microwave heating apparatus. By combining gas-fired heating and microwave heating, in addition to retaining the advantages of low per-calorific costs of fuel gases and strong penetration of microwaves, respective disadvantages found in each are also overcome, thus greatly reducing a firing cycle for the product, and further increasing the yield in a unit time.

Description

一种微波、燃气混合加热辊道窑Microwave and gas mixed heating roller kiln 技术领域Technical field
本发明涉及加热设备技术领域，尤其涉及一种微波、燃气混合加热辊道窑。The invention relates to the technical field of heating equipment, in particular to a microwave and gas mixed heating roller kiln.
背景技术Background technique
辊道窑主要用于瓷砖、房屋外墙砖、内墙砖和地面砖等陶瓷制品的烧制；辊道窑以转动的辊子作为坯体运载工具，陶瓷产品放置在许多条间隔很密的辊子上，靠辊子的转动使陶瓷从窑头传送到窑尾，故而称为辊道窑。The roller kiln is mainly used for the firing of ceramic products such as ceramic tiles, house exterior wall tiles, interior wall tiles and floor tiles; the roller kiln uses rotating rollers as the carrier of the green body, and the ceramic products are placed on many closely spaced rollers. On the top, the ceramics are transferred from the kiln head to the kiln end by the rotation of the rollers, so it is called a roller kiln.
传统的燃气辊道窑在加热产品时，是使用燃气加热环境空气再由环境空气加热产品；在加热过程中，产品表面与热空气直接接触，而产品内部的热量全部经过产品表面传导；因此，产品内部升温要比产品表面慢很多。The traditional gas roller kiln heats the product by using gas to heat the ambient air and then the ambient air to heat the product; during the heating process, the surface of the product is in direct contact with the hot air, and all the heat inside the product is conducted through the surface of the product; therefore, The temperature rise inside the product is much slower than the surface of the product.
当在加热体积大、厚度大的制品，以及所加热的制品导热率不佳时，产品内部升温到要求设定温度需要较长时间，从而产品烧成周期时间延长，产量减少。When heating large and thick products, and the thermal conductivity of the heated products is not good, it takes a long time for the internal temperature of the product to rise to the required set temperature, so that the product firing cycle time is prolonged and the output is reduced.
发明内容Summary of the invention
本发明的目的是提供一种微波、燃气混合加热辊道窑，该辊道窑即使在加热体积大、厚度大的制品或在所加热的制品导热率不佳时，可以进一步缩短产品的烧成周期、提高产量。The purpose of the present invention is to provide a microwave and gas mixed heating roller kiln, which can further shorten the firing of products even when heating products with large volume and thickness or when the thermal conductivity of the heated products is not good. Cycle and increase production.
为了实现上述目的，本发明的技术方案是：In order to achieve the above objective, the technical solution of the present invention is:
一种微波、燃气混合加热辊道窑，其包括：A microwave and gas mixed heating roller kiln, which includes:
辊道窑本体；Roller kiln body;
所述辊道窑本体包括依次连接的第一加热段、第二加热段；The roller kiln body includes a first heating section and a second heating section connected in sequence;
其中，所述第一加热段内设有燃气加热装置，所述第二加热段内设有微波 加热装置。Wherein, the first heating section is provided with a gas heating device, and the second heating section is provided with a microwave heating device.
本发明的微波、燃气混合加热辊道窑，通过将辊道窑本体内的加热段分为依次连接的第一、第二加热段，并且在第一加热段内设置燃气加热装置，在第二加热段内设置微波加热装置；当产品进入辊道窑本体后先通过第一加热段，第一加热段内被燃气加热装置加热的空气使产品外表面得以升温，进而产品通过第二加热段，由微波加热装置发出的微波使产品的内部得以快速升温。本发明通过结合燃气加热和微波加热两种方式，既保留了燃气单位热值成本低和微波穿透性强的优点，又相对克服了各自存在的缺点，从而大幅缩短了产品的烧成周期，进一步提高了单位时间内的产量。In the microwave and gas mixed heating roller kiln of the present invention, the heating section in the roller kiln body is divided into first and second heating sections connected in sequence, and a gas heating device is installed in the first heating section, and the second heating section is A microwave heating device is installed in the heating section; when the product enters the roller kiln body, it first passes through the first heating section. The air heated by the gas heating device in the first heating section heats the outer surface of the product, and then the product passes through the second heating section. The microwave emitted by the microwave heating device makes the inside of the product heat up quickly. By combining the two methods of gas heating and microwave heating, the present invention not only retains the advantages of low gas unit calorific value cost and strong microwave penetration, but also relatively overcomes their own shortcomings, thereby greatly shortening the firing cycle of the product. Further increase the output per unit time.
进一步地，所述第二加热段两端分别到所述微波加热装置的距离，大于所述微波加热装置所发出的微波衰减到安全值所需的距离。Further, the distance between the two ends of the second heating section and the microwave heating device is greater than the distance required for the microwaves emitted by the microwave heating device to attenuate to a safe value.
本发明通过使第二加热段的两端分别到微波加热装置的距离，大于微波加热装置所发出的微波衰减到安全值所需的距离，从而在第一、第二加热段之间不需要设置用于屏蔽微波的帐幕，也能保证操作人员的安全。In the present invention, the distance between the two ends of the second heating section and the microwave heating device is greater than the distance required for the microwave emitted by the microwave heating device to attenuate to a safe value, so that there is no need to set up between the first and second heating sections. The tent used to shield the microwave can also ensure the safety of the operators.
进一步地，所述第二加热段的内壁设有微波屏蔽材料。Further, the inner wall of the second heating section is provided with a microwave shielding material.
进一步地，该微波、燃气混合加热辊道窑还包括烟气余热回收装置；Further, the microwave and gas mixed heating roller kiln further includes a flue gas waste heat recovery device;
所述烟气余热回收装置包括连接于所述第一加热段的第一风管、用于将所述第一加热段的烟气抽到所述第一风管的风机。The flue gas waste heat recovery device includes a first air duct connected to the first heating section, and a fan for drawing the flue gas of the first heating section to the first air duct.
进一步地，其中，所述第一风管连接在所述第一加热段的前端，用于引导所述第一加热段内的烟气沿远离所述第二加热段的方向流动。Further, wherein the first air pipe is connected to the front end of the first heating section, and is used to guide the flue gas in the first heating section to flow in a direction away from the second heating section.
本发明通过将第一风管连接在第一加热段的前端，从而使第一加热段内的烟气向第一加热段的前端，也就是远离第二加热段的方向流动，从而避免燃气加热产生的烟气过多地涌入到第二加热段，对微波加热装置造成损坏。The present invention connects the first air pipe to the front end of the first heating section, so that the flue gas in the first heating section flows to the front end of the first heating section, that is, away from the second heating section, thereby avoiding gas heating Excessive flue gas flows into the second heating section, causing damage to the microwave heating device.
进一步地，所述辊道窑本体还包括有保温段，所述保温段内设有燃气加热装置；Further, the roller kiln body further includes a heat preservation section, and a gas heating device is provided in the heat preservation section;
所述第一加热段、第二加热段和保温段依次连接。The first heating section, the second heating section and the heat preservation section are connected in sequence.
进一步地，所述烟气余热回收装置还包括两端分别与所述保温段、所述风机连接的第二风管；Further, the flue gas waste heat recovery device further includes a second air pipe connected to the heat preservation section and the fan at both ends;
其中，所述第二风管连接在所述保温段的后端，用于引导所述保温段内的烟气沿远离所述第二加热段的方向流动。Wherein, the second air pipe is connected to the rear end of the heat preservation section, and is used to guide the flue gas in the heat preservation section to flow in a direction away from the second heating section.
作为一种具体实施方式，该微波、燃气混合加热辊道窑还包括助燃风装置；As a specific embodiment, the microwave and gas mixed heating roller kiln further includes a combustion-supporting air device;
所述助燃风装置与所述烟气余热回收系统通过换热器连接，通过换热器利用烟气余热回收系统中的热量对助燃风装置进行余热。The combustion-supporting air device and the flue gas waste heat recovery system are connected through a heat exchanger, and the heat in the flue gas waste heat recovery system is used to heat the combustion-supporting air device through the heat exchanger.
作为一种具体实施方式，所述辊道窑本体还包括有冷却段，所述冷却段连接有冷却风装置，所述冷却风装置用于生成低温或常温的风流，吹入所述冷却段内；As a specific embodiment, the roller kiln body further includes a cooling section connected with a cooling air device, and the cooling air device is used to generate a low-temperature or normal-temperature wind flow, which is blown into the cooling section ；
所述第一加热段、第二加热段、保温段和冷却段依次连接。The first heating section, the second heating section, the heat preservation section and the cooling section are connected in sequence.
作为一种具体实施方式，该微波、燃气混合加热辊道窑还包括设于所述辊道窑本体内的辊棒传送装置。As a specific embodiment, the microwave and gas mixed heating roller kiln further includes a roller conveying device arranged in the body of the roller kiln.
为了更好地理解和实施，下面结合附图详细说明本发明。For a better understanding and implementation, the present invention will be described in detail below in conjunction with the accompanying drawings.
附图说明Description of the drawings
图1是本发明实施例的微波、燃气混合加热辊道窑的前部分结构示意图；Figure 1 is a schematic diagram of the front part of the microwave and gas mixed heating roller kiln according to an embodiment of the present invention;
图2是本发明实施例的微波、燃气混合加热辊道窑的第二加热段处的截面剖视图；2 is a cross-sectional view of the second heating section of the microwave and gas mixed heating roller kiln according to the embodiment of the present invention;
图3是本发明实施例的微波、燃气混合加热辊道窑的后部分结构示意图。Figure 3 is a schematic diagram of the rear part of the microwave and gas mixed heating roller kiln according to the embodiment of the present invention.
具体实施方式Detailed ways
为了更好地阐述本发明，下面参照附图对本发明作进一步的详细描述。In order to better explain the present invention, the present invention will be further described in detail below with reference to the accompanying drawings.
如图1所示，一种微波、燃气混合加热辊道窑，其包括：As shown in Figure 1, a microwave and gas mixed heating roller kiln includes:
辊道窑本体100；Roller kiln body 100;
所述辊道窑本体100包括依次连接的第一加热段110、第二加热段120；The roller kiln body 100 includes a first heating section 110 and a second heating section 120 connected in sequence;
其中，所述第一加热段110内设有燃气加热装置，所述第二加热段120内设有微波加热装置。Wherein, the first heating section 110 is provided with a gas heating device, and the second heating section 120 is provided with a microwave heating device.
需要说明的是，在不影响理解的情况下，附图中未给出燃气加热装置和微波加热装置的具体结构示意图。It should be noted that, as long as the understanding is not affected, the specific structural schematic diagrams of the gas heating device and the microwave heating device are not shown in the drawings.
具体地，该微波、燃气混合加热辊道窑还包括设于所述辊道窑本体100内的辊棒传送装置200。Specifically, the microwave and gas mixed heating roller kiln further includes a roller conveying device 200 arranged in the roller kiln body 100.
所述燃气加热装置的结构与现有技术基本相同，其燃烧室在辊棒传送装置的下方，用压缩空气雾化天然气、重油、柴油等燃料进行燃烧产生高温，从而对第一加热段内的空气加热；而燃烧室与辊棒之间，有耐火材料隔离，火焰不直接接触被烧制的产品。The structure of the gas heating device is basically the same as that of the prior art. Its combustion chamber is under the roller conveyor. Compressed air is used to atomize natural gas, heavy oil, diesel and other fuels to burn to generate high temperature, thereby reducing the heat in the first heating section. Air heating; and between the combustion chamber and the roller, there is refractory material isolation, the flame does not directly contact the burned product.
如图2所示，所述微波加热装置，包括微波发生源组件300；优选地，微波发生源组件300设置在第二加热段120的顶部，由上至下向通过第二加热段120的产品发出微波。As shown in FIG. 2, the microwave heating device includes a microwave generating source assembly 300; preferably, the microwave generating source assembly 300 is arranged on the top of the second heating section 120, and the product passing through the second heating section 120 from top to bottom Microwaves are emitted.
优选地，所述第二加热段120的内壁设有微波屏蔽材料400，以防止微波从辊道窑本体的侧壁、顶部泄漏。Preferably, the inner wall of the second heating section 120 is provided with a microwave shielding material 400 to prevent microwaves from leaking from the side walls and top of the roller kiln body.
优选地，处于第二加热段底部的辊棒传送装置，其每个辊棒两端都封闭于一个金属罩内，以防止微波从辊棒传送装置处泄漏出。Preferably, the roller conveying device at the bottom of the second heating section has both ends of each roller enclosed in a metal cover to prevent microwaves from leaking from the roller conveying device.
本实施例的微波、燃气混合加热辊道窑，通过将辊道窑本体内的加热段分 为依次连接的第一、第二加热段，并且在第一加热段内设置燃气加热装置，在第二加热段内设置微波加热装置；当产品进入辊道窑本体后先通过第一加热段，第一加热段内被燃气加热装置加热的空气使产品外表面得以升温，进而产品通过第二加热段，由微波加热装置发出的微波使产品的内部得以快速升温。本发明通过结合燃气加热和微波加热两种方式，既保留了燃气单位热值成本低和微波穿透性强的优点，又相对克服了各自存在的缺点，从而大幅缩短了产品的烧成周期，进一步提高了单位时间内的产量。In the microwave and gas mixed heating roller kiln of this embodiment, the heating section in the roller kiln body is divided into first and second heating sections connected in sequence, and a gas heating device is installed in the first heating section. The second heating section is equipped with a microwave heating device; when the product enters the roller kiln body, it first passes through the first heating section. The air heated by the gas heating device in the first heating section heats the outer surface of the product, and then the product passes through the second heating section , The microwave emitted by the microwave heating device makes the inside of the product heat up quickly. By combining the two methods of gas heating and microwave heating, the present invention not only retains the advantages of low gas unit calorific value cost and strong microwave penetration, but also relatively overcomes their own shortcomings, thereby greatly shortening the firing cycle of the product. Further increase the output per unit time.
优选地，所述第二加热段120两端分别到所述微波加热装置的距离，大于所述微波加热装置所发出的微波衰减到安全值所需的距离。Preferably, the distance between the two ends of the second heating section 120 and the microwave heating device is greater than the distance required for the microwaves emitted by the microwave heating device to attenuate to a safe value.
本实施例通过使第二加热段的两端分别到微波加热装置的距离，大于微波加热装置所发出的微波衰减到安全值所需的距离，从而在第一、第二加热段之间不需要设置用于屏蔽微波的帐幕，也能保证操作人员的安全。In this embodiment, the distance between the two ends of the second heating section and the microwave heating device is greater than the distance required for the microwaves emitted by the microwave heating device to attenuate to a safe value, so that there is no need for the distance between the first and second heating sections. Setting up a tent for shielding microwaves can also ensure the safety of operators.
由于第一、第二加热段之间不需要设置帐幕，因此第一、第二加热段的温度不会相差太大，因此产品从第一加热段进入第二加热段后，其外表面不会被第二加热段内的空气所冷却。Since there is no need to set up a tent between the first and second heating sections, the temperature of the first and second heating sections will not be too different. Therefore, after the product enters the second heating section from the first heating section, its outer surface will not It is cooled by the air in the second heating section.
优选地，该微波、燃气混合加热辊道窑还包括烟气余热回收装置500；Preferably, the microwave and gas mixed heating roller kiln further includes a flue gas waste heat recovery device 500;
所述烟气余热回收装置500包括连接于所述第一加热段110的第一风管510、用于将所述第一加热段110的烟气抽到所述第一风管510的风机530。The flue gas waste heat recovery device 500 includes a first air duct 510 connected to the first heating section 110, and a fan 530 for drawing the flue gas of the first heating section 110 to the first air duct 510 .
本实施例通过将第一风管连接在第一加热段的前端，从而使第一加热段内的烟气向第一加热段的前端，也就是远离第二加热段的方向流动，从而避免燃气加热产生的烟气过多地涌入到第二加热段，对微波加热装置造成损坏。In this embodiment, the first air pipe is connected to the front end of the first heating section, so that the flue gas in the first heating section flows toward the front end of the first heating section, that is, away from the second heating section, thereby avoiding gas Excessive flue gas generated by heating flows into the second heating section, causing damage to the microwave heating device.
优选地，所述辊道窑本体100还包括有保温段130，所述保温段130内设有燃气加热装置；Preferably, the roller kiln body 100 further includes a heat preservation section 130, and a gas heating device is provided in the heat preservation section 130;
所述第一加热段110、第二加热段120和保温段130依次连接。The first heating section 110, the second heating section 120 and the heat preservation section 130 are connected in sequence.
需要说明的是，保温段与第一加热段的设置相同，区别在于其燃气加热装置的加热功率略低于第一加热段内的燃气加热装置的功率。It should be noted that the setting of the heat preservation section is the same as that of the first heating section, except that the heating power of the gas heating device is slightly lower than the power of the gas heating device in the first heating section.
优选地，所述烟气余热回收装置500还包括两端分别与所述保温段130、所述风机530连接的第二风管520；Preferably, the flue gas waste heat recovery device 500 further includes a second air pipe 520 connected to the heat preservation section 130 and the fan 530 at both ends;
其中，所述第二风管520连接在所述保温段130的后端，用于引导所述保温段130内的烟气沿远离所述第二加热段120的方向流动。Wherein, the second air pipe 520 is connected to the rear end of the heat preservation section 130 and is used to guide the flue gas in the heat preservation section 130 to flow in a direction away from the second heating section 120.
具体地，该微波、燃气混合加热辊道窑还包括助燃风装置600，助燃风装置600用于对第一加热段110、保温段130底部的燃气加热装置提供助燃风；Specifically, the microwave and gas mixed heating roller kiln further includes a combustion-supporting wind device 600, which is used to provide combustion-supporting wind to the gas heating device at the bottom of the first heating section 110 and the heat preservation section 130;
所述助燃风装置600与所述烟气余热回收装置500通过换热器700连接，通过换热器利用烟气余热回收系统中的热量对助燃风装置内的助燃风进行预热。The combustion air device 600 and the flue gas waste heat recovery device 500 are connected through a heat exchanger 700, and the heat in the flue gas waste heat recovery system is used to preheat the combustion air in the combustion air device through the heat exchanger.
具体地，所述辊道窑本体还包括有冷却段，所述冷却段连接有冷却风装置800，所述冷却风装置800用于生成低温或常温的风流，吹入所述冷却段内；Specifically, the roller kiln body further includes a cooling section, and the cooling section is connected with a cooling air device 800, and the cooling air device 800 is used to generate a low-temperature or normal-temperature wind flow, which is blown into the cooling section;
所述第一加热段110、第二加热段120、保温段130和冷却段依次连接。The first heating section 110, the second heating section 120, the heat preservation section 130 and the cooling section are connected in sequence.
具体地，所述冷却段包括急速冷却段140和缓慢冷却段150，急速冷却段140和缓慢冷却段150均由冷却风装置800提供冷风，区别在于冷却风装置在急速冷却段的出风口风速与在缓慢冷却段的出风口风速不同，或者是向急速冷却段和缓慢冷却段所提供的冷风的温度不同。Specifically, the cooling section includes a rapid cooling section 140 and a slow cooling section 150. Both the rapid cooling section 140 and the slow cooling section 150 are provided with cold air by the cooling air device 800. The difference is that the wind speed at the outlet of the cooling air device in the rapid cooling section is The wind speed of the air outlet in the slow cooling section is different, or the temperature of the cold air provided to the rapid cooling section and the slow cooling section is different.
需要说明的是，在本实施例中，第一加热段110、第二加热段120、保温段130、急速冷却段140和缓慢冷却段150之间使用导电密封圈连接；另外，还可以使用导电硅胶、导电石墨盘根等物件连接各段。It should be noted that, in this embodiment, the first heating section 110, the second heating section 120, the heat preservation section 130, the rapid cooling section 140, and the slow cooling section 150 are connected by a conductive sealing ring; in addition, a conductive seal can also be used. Objects such as silica gel and conductive graphite packing connect each section.
另外，在不相互矛盾的情况下，本领域的技术人员可以将本说明书中描述 的不同实施例或示例以及不同实施例或示例的特征进行结合和组合。In addition, those skilled in the art can combine and combine the different embodiments or examples and the features of the different embodiments or examples described in this specification without contradicting each other.
在本发明的描述中，需要理解的是，术语“竖向”、“横向”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为便于描述本发明和简化描述，而不是指示或暗指所指的装置或元件必须具有特定的方位、为特定的方位构造和操作，因而不能理解为对本发明保护内容的限制。In the description of the present invention, it should be understood that the terms "vertical", "lateral", "front", "rear", "left", "right", "vertical", "horizontal", "top" , "Bottom", "Inner", "Outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying what is meant. The device or element must have a specific orientation, be configured and operated in a specific orientation, and therefore cannot be understood as a limitation of the protection content of the present invention.
如果本文中使用了“第一”、“第二”等词语来限定零部件的话，本领域技术人员应该知晓：“第一”、“第二”的使用仅仅是为了便于描述本发明和简化描述，如没有另外声明，上述词语并没有特殊的含义。If words such as "first" and "second" are used in this article to define parts, those skilled in the art should know that: "first" and "second" are used only for the convenience of describing the present invention and simplifying the description. , Unless otherwise stated, the above words have no special meaning.
本发明并不局限于上述实施方式，如果对本发明的各种改动或变形不脱离本发明的精神和范围，倘若这些改动和变形属于本发明的权利要求和等同技术范围之内，则本发明也意图包含这些改动和变形。The present invention is not limited to the above-mentioned embodiments. If various changes or modifications to the present invention do not depart from the spirit and scope of the present invention, and if these changes and modifications fall within the scope of the claims of the present invention and equivalent technical scope, the present invention will also It is intended to include these changes and modifications.

Claims (10)

  1. 一种微波、燃气混合加热辊道窑，其特征在于，包括：A microwave and gas mixed heating roller kiln, which is characterized in that it comprises:
    辊道窑本体；Roller kiln body;
    所述辊道窑本体包括依次连接的第一加热段、第二加热段；The roller kiln body includes a first heating section and a second heating section connected in sequence;
    其中，所述第一加热段内设有燃气加热装置，所述第二加热段内设有微波加热装置。Wherein, a gas heating device is provided in the first heating section, and a microwave heating device is provided in the second heating section.
  2. 根据权利要求1所述的微波、燃气混合加热辊道窑，其特征在于：The microwave and gas mixed heating roller kiln according to claim 1, characterized in that:
    所述第二加热段两端分别到所述微波加热装置的距离，大于所述微波加热装置所发出的微波衰减到安全值所需的距离。The distances from both ends of the second heating section to the microwave heating device are greater than the distance required for the microwaves emitted by the microwave heating device to attenuate to a safe value.
  3. 根据权利要求1所述的微波、燃气混合加热辊道窑，其特征在于：The microwave and gas mixed heating roller kiln according to claim 1, characterized in that:
    所述第二加热段的内壁设有微波屏蔽材料。The inner wall of the second heating section is provided with a microwave shielding material.
  4. 根据权利要求1所述的微波、燃气混合加热辊道窑，其特征在于，还包括：The microwave and gas mixed heating roller kiln according to claim 1, characterized in that it further comprises:
    烟气余热回收装置；Flue gas waste heat recovery device;
    所述烟气余热回收装置包括连接于所述第一加热段的第一风管、用于将所述第一加热段的烟气抽到所述第一风管的风机。The flue gas waste heat recovery device includes a first air duct connected to the first heating section, and a fan for drawing the flue gas of the first heating section to the first air duct.
  5. 根据权利要求4所述的微波、燃气混合加热辊道窑，其特征在于：The microwave and gas mixed heating roller kiln according to claim 4, characterized in that:
    其中，所述第一风管连接在所述第一加热段的前端，用于引导所述第一加热段内的烟气沿远离所述第二加热段的方向流动。Wherein, the first air pipe is connected to the front end of the first heating section, and is used to guide the flue gas in the first heating section to flow in a direction away from the second heating section.
  6. 根据权利要求5所述的微波、燃气混合加热辊道窑，其特征在于：The microwave and gas mixed heating roller kiln according to claim 5, characterized in that:
    所述辊道窑本体还包括有保温段，所述保温段内设有燃气加热装置；The roller kiln body further includes a heat preservation section, and a gas heating device is provided in the heat preservation section;
    所述第一加热段、第二加热段和保温段依次连接。The first heating section, the second heating section and the heat preservation section are connected in sequence.
  7. 根据权利要求6所述的微波、燃气混合加热辊道窑，其特征在于：The microwave and gas mixed heating roller kiln according to claim 6, characterized in that:
    所述烟气余热回收装置还包括两端分别与所述保温段、所述风机连接的第二风管；The flue gas waste heat recovery device also includes a second air pipe connected to the heat preservation section and the fan at both ends;
    其中，所述第二风管连接在所述保温段的后端，用于引导所述保温段内的烟气沿远离所述第二加热段的方向流动。Wherein, the second air pipe is connected to the rear end of the heat preservation section, and is used to guide the flue gas in the heat preservation section to flow in a direction away from the second heating section.
  8. 根据权利要求1所述的微波、燃气混合加热辊道窑，其特征在于，还包括：The microwave and gas mixed heating roller kiln according to claim 1, characterized in that it further comprises:
    助燃风装置；Combustion-supporting wind device;
    所述助燃风装置与所述烟气余热回收系统之间连接有换热器。A heat exchanger is connected between the combustion-supporting air device and the flue gas waste heat recovery system.
  9. 根据权利要求1所述的微波、燃气混合加热辊道窑，其特征在于，包括：The microwave and gas mixed heating roller kiln according to claim 1, characterized in that it comprises:
    所述辊道窑本体还包括有冷却段，所述冷却段连接有冷却风装置，所述冷却风装置用于生成低温或常温的风流，吹入所述冷却段内；The roller kiln body further includes a cooling section connected with a cooling air device, and the cooling air device is used to generate a low-temperature or normal-temperature wind flow, which is blown into the cooling section;
    所述第一加热段、第二加热段、保温段和冷却段依次连接。The first heating section, the second heating section, the heat preservation section and the cooling section are connected in sequence.
  10. 根据权利要求1-9任一项所述的微波、燃气混合加热辊道窑，其特征在于，包括，还包括：The microwave and gas mixed heating roller kiln according to any one of claims 1-9, characterized by comprising, further comprising:
    设于所述辊道窑本体内的辊棒传送装置。A roller conveying device arranged in the main body of the roller kiln.
PCT/CN2020/120617 2019-12-18 2020-10-13 Microwave and gas-fired hybrid heating roller kiln WO2021120801A1 (en)

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CN110822893A (en) * 2019-12-18 2020-02-21 广东科达洁能股份有限公司 Microwave and gas mixed heating roller kiln

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CN208398623U (en) * 2018-07-12 2019-01-18 湖南碳谷装备制造有限公司 A kind of microwave, natural gas roller kilns
CN110822893A (en) * 2019-12-18 2020-02-21 广东科达洁能股份有限公司 Microwave and gas mixed heating roller kiln
CN211695835U (en) * 2019-12-18 2020-10-16 广东科达洁能股份有限公司 Microwave and gas mixed heating roller kiln

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JP2006160963A (en) * 2004-12-10 2006-06-22 Kobe Steel Ltd Dechlorination treatment apparatus
CN102042749A (en) * 2010-12-17 2011-05-04 湖南航天工业总公司 Fully-closed industrial microwave high-temperature roller continuous sintering kiln
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CN208398623U (en) * 2018-07-12 2019-01-18 湖南碳谷装备制造有限公司 A kind of microwave, natural gas roller kilns
CN110822893A (en) * 2019-12-18 2020-02-21 广东科达洁能股份有限公司 Microwave and gas mixed heating roller kiln
CN211695835U (en) * 2019-12-18 2020-10-16 广东科达洁能股份有限公司 Microwave and gas mixed heating roller kiln

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