CN213020932U

CN213020932U - High-efficient multilayer multiseriate atmosphere protection roller kilns

Info

Publication number: CN213020932U
Application number: CN202020813752.0U
Authority: CN
Inventors: 万鹏; 袁茂圣; 田加团; 李成哲; 吴锐军
Original assignee: Guangdong Champon New Energy Technology Co ltd
Current assignee: Guangdong Champon New Energy Technology Co ltd
Priority date: 2020-05-15
Filing date: 2020-05-15
Publication date: 2021-04-20
Anticipated expiration: 2030-05-15

Abstract

The utility model provides a high-efficient multilayer multiseriate atmosphere protection roller kilns, including section and the cooling zone of rising temperature, all be equipped with first intake pipe at the furnace chamber top of the section of rising temperature, bottom and both sides face, the furnace chamber top and the bottom of the section of rising temperature are equipped with exhaust outlet respectively and are used for taking out the waste gas from the furnace intracavity, adopt intermediate layer forced air cooling and fin heat exchange tube cooling simultaneously in the furnace chamber of cooling zone, intermediate layer forced air cooling realizes through the air of cold wind entry and hot air exitus of flowing through, the fin heat exchange tube runs through the furnace chamber, let in cooling medium in the fin heat exchange tube. The utility model ensures that each layer of saggar is fully contacted with oxygen, thereby improving the qualification rate; oxygen can continuously enter the sagger to fully react with the product; the oxygen is preheated before entering, so that the influence on the product quality caused by too large temperature difference of the section of the kiln due to the introduced normal-temperature oxygen is avoided; the overall energy consumption is reduced; the cooling time of the product is shortened, and the quality of the finished product is improved.

Description

High-efficient multilayer multiseriate atmosphere protection roller kilns

Technical Field

The utility model relates to a roller kilns technical field refers in particular to a high-efficient multilayer multiseriate atmosphere protection roller kilns.

Background

In recent years, with the enhancement of environmental awareness and the aggravation of energy crisis, the development and application of new energy sources become the focus of domestic attention. Under the strong support of the country, lithium ion batteries have been increased explosively. The reaction sintering process is a key ring in the manufacturing of lithium ion battery materials. The reaction sintering equipment mainly takes a push plate type channel furnace and a rotary furnace originally, and because the production of lithium battery materials enters large-scale and continuous operation, a sintering roller kiln replaces other types of kilns.

The sintering roller kiln is a flat furnace bottom consisting of a plurality of SIC roller rods, the roller rods continuously rotate under the drive of a power source, exhaust pipes are arranged at the top of the sintering roller kiln, exhaust gas is discharged by exhaust fans, air or oxygen is introduced into the bottom of the sintering roller kiln through air blowers, saggers for placing products in multiple rows continuously move on a roller table at a low speed, and the preheating, calcining and cooling processes of the products are completed in the process of moving from the head of the sintering roller kiln to the tail of the sintering roller kiln.

At present, a sintering roller kiln used by a ternary lithium battery material manufacturer generally has 4 double layers and 6 single layers. In order to improve the yield and reduce the unit energy consumption of materials, the saggars can be only stacked into three layers or even four layers. Because the heating mode of the roller kiln is vertical heating, the increase of the sagger layer number inevitably leads to the non-uniformity of the temperature of the calcined material. If the sagger of the roller kiln at the present stage is more than three layers, the temperature rise speed of the materials in the sagger is far slower than that of the materials on the surface, so that the performances of the materials in the roller kiln and the materials outside the roller kiln are inconsistent, and the quality of products in batches is reduced.

The ternary material calcining process is a process which generates a large amount of waste gas and consumes a large amount of oxygen, and the existing roller kiln is designed with an air exhaust system at the top and an air inlet system at the bottom to meet the calcining requirement. The design can not meet the calcination requirement of more than three layers of materials.

In order to ensure that the temperature of the product discharged from the kiln is not too high, air cooling interlayer cooling is generally adopted in the cooling section of the kiln. Under the condition that the sagger layer number is more than 3, products in the bottom sagger are difficult to cool only by using the air cooling interlayer, and the temperature of discharging from a kiln is higher.

SUMMERY OF THE UTILITY MODEL

In order to solve the problems, the utility model provides a high-efficiency multilayer multi-row atmosphere protection roller kiln, which ensures that each layer of saggar is fully contacted with oxygen, ensures the normal reaction of products in the kiln and improves the qualification rate; oxygen can continuously enter the sagger to fully react with the product; the oxygen entering the temperature rising section is preheated before entering the temperature rising section, so that the influence on the product quality caused by too large temperature difference of the section of the kiln due to the introduced normal-temperature oxygen is avoided; the overall energy consumption is reduced; the cooling time of the product is shortened, the product discharged from the furnace is ensured to be timely cooled to a proper temperature, and the quality of the finished product is improved.

In order to realize the purpose, the utility model discloses a technical scheme as follows:

the utility model provides a high-efficient multilayer multiseriate atmosphere protection roller kilns, is including rising temperature section and cooling zone, all is equipped with first intake pipe at the furnace chamber top of the section of rising temperature, bottom and both sides face, and wherein the first intake pipe of both sides is just to the casket-like bowl, and the top and the bottom of the furnace chamber of the section of rising temperature are equipped with the exhaust outlet respectively and are used for taking out the waste gas in the furnace chamber, adopt intermediate layer forced air cooling and fin heat exchange tube cooling simultaneously in the furnace chamber of cooling zone, and the furnace chamber top and the bottom of cooling zone are equipped with cold wind entry and the hot air exitus that are linked together respectively, intermediate layer forced air cooling realizes through the air that flows through cold wind entry and hot air exitus, fin heat exchange tube cooling is through locating the fin heat exchange tube heat of casket-like.

Preferably, a plurality of interlayers are respectively arranged above and below the furnace chamber of the cooling section at intervals, and the cold air inlet and the hot air outlet are arranged in each interlayer.

Preferably, three or more saggars are placed in the roller kiln.

Preferably, the protective gas introduced into the first gas inlet pipe of the temperature raising section is preheated.

Preferably, the cooling medium after the heat exchange and temperature rise of the fin heat exchange tube is used for preheating the protective gas before the protective gas is introduced into the furnace chamber.

Preferably, the bottom and two side faces of the furnace chamber of the cooling section are respectively provided with a second air inlet pipe for introducing protective gas, and the height of the second air inlet pipes positioned on the two side faces is higher than that of the saggar positioned at the top.

Preferably, the protective gas is oxygen.

The utility model discloses beneficial effect:

1. first air inlet pipes are arranged at the top, the bottom and two side surfaces of the furnace chamber of the temperature rise section for supplying oxygen, so that each layer of saggar is ensured to be fully contacted with oxygen, the normal reaction of products in the furnace is ensured, and the qualification rate is improved;

2. the waste gas is simultaneously pumped away from the upper part and the lower part of the furnace chamber in the temperature rising section, so that the kiln pressure is not overhigh, the influence of increasing the top pumping force of a conventional kiln on the kiln pressure is solved, and oxygen can continuously enter the sagger to fully react with a product;

3. the oxygen entering the temperature rising section is preheated before entering the temperature rising section, so that the influence on the product quality caused by too large temperature difference of the section of the kiln due to the introduced normal-temperature oxygen is avoided;

4. the cooled coal after heat exchange is used for heating the oxygen before being introduced into the furnace chamber of the heating section, so that the heat of the cooled coal is fully utilized, and the overall energy consumption is reduced.

5. And an interlayer air cooling and fin heat exchange tube cooling mode is adopted in the furnace chamber of the cooling section, so that the heat exchange efficiency is improved, the product cooling time is shortened, the products discharged from the furnace are ensured to be timely cooled to a proper temperature, and the quality of finished products is improved.

Drawings

Fig. 1 is a front view of the present invention;

FIG. 2 is a cross-sectional view of the cooling section of the present invention;

FIG. 3 is a front view of a section of the cooling section of the present invention showing the length of the interlayer;

fig. 4 is a cross-sectional view of the warming section of the present invention.

Detailed Description

The technical solution of the present invention will be described below with reference to the accompanying drawings and examples.

As shown in fig. 1-4, a high-efficient multilayer multiseriate atmosphere protection roller kilns, including section and the cooling zone of rising the temperature, the section of rising the temperature is in the front, and the cooling zone is at the back, and saggar 1 in the kiln removes at 2 tops of roller stick, and has placed the product in the saggar 1, in this embodiment, place three-layer or saggar 1 more than the three-layer in the roller kilns, all be equipped with first intake pipe 3 at the furnace chamber top of the section of rising the temperature, bottom and both sides face, what first intake pipe 3 let in is oxygen, wherein the first intake pipe 3 of both sides is just to saggar 1, just so can ensure that every layer of saggar 1 all has sufficient oxygen to react. The top and the bottom of the furnace chamber of the heating section are respectively provided with a waste gas outlet 4 for pumping waste gas out of the furnace chamber, so that the suction force of an exhaust fan at the top of the furnace chamber is not increased, the pressure in the furnace is not too low, the waste gas can be pumped out in time, and the normal reaction of products is ensured.

Specifically, the furnace chamber of the cooling section is simultaneously cooled by interlayer air cooling and finned heat exchange tubes, interlayers are respectively arranged at the top and the bottom of the furnace chamber of the cooling section, an independent interlayer is arranged at each interval, a cold air inlet 5 and a hot air outlet 6 which are communicated are arranged in the interlayers, the cold air inlet 5 above the furnace chamber of the cooling section is communicated with the cold air outlet 6 above the furnace chamber, the cold air inlet 5 below the furnace chamber of the cooling section is communicated with the cold air outlet 6 below the furnace chamber, cold air is introduced from the cold air inlet 5, and after heat exchange between the cold air and the products on the furnace chamber and the sagger 1, the cold air is heated and then discharged from the hot air outlet 6, and the interlayer air cooling is realized by air flowing through the cold air inlet 5 and the hot air. The cooling of the fin heat exchange tube is realized by heat exchange of the fin heat exchange tubes 7 arranged on the upper part and the lower part of the sagger 1, the fin heat exchange tubes 7 penetrate through a furnace chamber, a cooling medium is introduced into the fin heat exchange tubes 7, cooling coal enters the fin heat exchange tubes 7 and exchanges heat with gas in the furnace chamber, so that the furnace temperature is reduced, the cooling medium after heat exchange and temperature rise of the fin heat exchange tubes 7 is used for preheating protective gas before the cooling coal is introduced into the furnace chamber, the heat of the cooling coal can be transferred to oxygen through one heat exchanger, and thus the oxygen entering a temperature rise section is preheated, the furnace temperature is not reduced too much, the normal reaction of products in the. The bottom and two side faces of the furnace chamber of the cooling section are respectively provided with a second air inlet pipe 8 for introducing protective gas, the protective gas is oxygen, the second air inlet pipes 8 positioned on the two side faces are higher than the saggar 1 at the top, and a tail gas discharge port 9 is arranged above the furnace chamber for discharging tail gas in the furnace chamber.

The utility model is provided with the first air inlet pipes 3 at the top, the bottom and the two side surfaces of the furnace chamber in the temperature rising section for oxygen supply, thereby ensuring that each layer of saggars 1 are fully contacted with oxygen, ensuring the normal reaction of products in the furnace and improving the qualification rate; the waste gas is simultaneously pumped away from the upper part and the lower part of the furnace chamber in the temperature rising section, so that the kiln pressure is not overhigh, the influence of increasing the top pumping force of a conventional kiln on the kiln pressure is solved, and oxygen can continuously enter the sagger 1 to fully react with a product; the oxygen before entering the temperature rise section is preheated, so that the influence of the introduced oxygen on the furnace temperature and the product quality is avoided; the cooled coal after heat exchange is used for heating the oxygen before being introduced into the furnace chamber of the heating section, so that the heat of the cooled coal is fully utilized, and the overall energy consumption is reduced. And an interlayer air cooling and fin heat exchange tube 7 is adopted for cooling in the furnace chamber of the cooling section, so that the heat exchange efficiency is improved, the product cooling time is shortened, the products discharged from the furnace are ensured to be timely cooled to a proper temperature, and the quality of finished products is improved.

In the description of the present invention, it should be understood that the terms "upper", "lower", "left", "right", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, only for convenience of description and simplification of description, but not for indicating or implying that the referred device or element must have a specific orientation and a specific orientation configuration and operation, and thus, should not be construed as limiting the present invention. Furthermore, "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate member, or they may be connected through two or more elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

While one embodiment of the present invention has been described in detail, the description is only a preferred embodiment of the present invention, and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should still fall within the patent coverage of the present invention.

Claims

1. The utility model provides a high-efficient multilayer multiseriate atmosphere protection roller kilns, is including section and the cooling zone of rising the temperature, its characterized in that: the top, the bottom and the two side faces of the furnace chamber of the heating section are respectively provided with a first air inlet pipe, the first air inlet pipes on the two sides are over against the saggar, the top and the bottom of the furnace chamber of the heating section are respectively provided with a waste gas outlet for extracting waste gas in the furnace chamber, the furnace chamber of the cooling section is simultaneously cooled by an interlayer air cooling and a fin heat exchange pipe, the top and the bottom of the furnace chamber of the cooling section are respectively provided with a cold air inlet and a hot air outlet which are communicated, the interlayer air cooling is realized by air flowing through the cold air inlet and the hot air outlet, the fin heat exchange pipe is cooled by heat exchange of fin heat exchange pipes arranged on the upper part and the lower part of the saggar.

2. The high-efficiency multi-layer multi-column atmosphere protection roller kiln as claimed in claim 1, wherein: a plurality of interlayers are respectively arranged above and below the furnace chamber of the cooling section at intervals, and the cold air inlet and the hot air outlet are arranged in each interlayer.

3. The high-efficiency multi-layer multi-column atmosphere protection roller kiln as claimed in claim 1, wherein: three or more saggars are placed in the roller kiln.

4. The high-efficiency multi-layer multi-column atmosphere protection roller kiln as claimed in claim 1, wherein: and the protective gas introduced into the first gas inlet pipe of the temperature raising section is preheated.

5. The high efficiency multi-layer multi-row atmosphere protection roller kiln according to claim 4, wherein: and the cooling medium after the heat exchange and temperature rise of the fin heat exchange tubes is used for preheating the protective gas before the protective gas is introduced into the furnace chamber.

6. The high-efficiency multi-layer multi-column atmosphere protection roller kiln as claimed in claim 1, wherein: and second air inlet pipes are arranged at the bottom and two side surfaces of the furnace chamber of the cooling section and are used for introducing protective gas, and the heights of the second air inlet pipes at the two side surfaces are higher than the top saggar.

7. The high-efficiency multilayer multi-row atmosphere protection roller kiln according to any one of claims 4-6, characterized in that: the protective gas is oxygen.