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In order to adapt to the development of "diversified raw materials for brick making, high porosity, high strength, multi-function and self decoration", Baoshen Group Chunxiang Kiln Co., Ltd. has independently developed a rapid wet billet drying system - chain plate rapid drying kiln in view of many quality defects existing in the one-time yard burning process. The cost of the system is basically the same as that of the primary code burning process, and the investment is greatly reduced compared with the traditional secondary code burning process. Baoshen brand chain plate rapid drying kiln has obtained the national patent (patent No.: ZL201821820625.2), which is also one of the preferred schemes for building and reforming brick and tile enterprises.
Single layer drying solution helps the brick type upgrade of sintered brick enterprises
China Jiangsu Customer Project equipment shipping spot shot
The chain plate rapid continuous drying kiln overcomes the complex problems caused by the cumbersome upper and lower frame cutting and stacking system in the traditional drying process, simplifies the production process, improves the drying efficiency, reduces the energy consumption in the drying process, and has the significant advantages of less investment and adaptability to a variety of products. This patented product is mainly composed of four parts: the wet billet marshalling and stacking system, the drying circulation system, the temperature detection&control system and the dry billet off stacking system to form a complete secondary burning drying system, which can realize multi segment independent PID temperature control, the temperature in the drying room is uniform, the chain plate conveying speed can be adjusted by frequency conversion, and the system can be adjusted freely, run stably, and the production efficiency is extremely high. According to the needs of technological transformation and product upgrading of enterprises, a new chain roller type rapid drying kiln with secondary code firing is developed to adapt to sintered wallboard and large size products, which can eliminate or greatly reduce drying shrinkage stress cracks and ensure the drying qualification rate.

China Jiangsu Customer’s Project Spot Shot Photo

China Shanxi Customer’s Project Spot Shot’Photo

China Shanxi Customer’s Project Spot Shot’Photo

China Jiangsu Customer Project equipment shipping spot shot

Baoshen Group Chunxiang Kiln Co., Ltd. wishes the customers both home and abroad a booming business!

1. [Overview of relevant policies]：

In order to adapt to the "development of brick and tile products in the direction of high content, high porosity, high strength, multi-function and self decoration", promote the resource utilization of solid waste residue, improve the ecological environment and reduce the emission of air pollution, in view of the many quality defects in the one-time yard burning process, Baoshen Group Chunxiang Kiln Co., Ltd., in accordance with the spirit of Document No. 279, The chain plate rapid drying kiln, which is a kind of secondary code burning equipment with the same cost as the primary code burning process, has been designed and developed. In November 2018, the Group invested more than 10 million yuan to upgrade the original experimental brick factory of the Group, which was completed and put into operation in May 2019. After two years of operation, commissioning and verification, it exceeded the expected results. The brick and tile enterprises have invested in one-time code burning, built a second code burning production line, and greatly improved the product quality. Baoshen brand chain plate rapid drying kiln has obtained the national patent. This research and development achievement will certainly become one of the main drying forms of the secondary yard burning process in the industry in the future, with a promising market prospect.

2. [ Main technical advantages and features]

2.1 Advantages of energy saving and consumption reduction:
According to the actual situation of porous brick production, when the firing temperature is 900 ℃ ~ 950 ℃, the energy consumption per kilogram of finished products is about 260kcal, which is 16% lower than that before transformation, and the daily coal consumption is 4.16t. Annual coal saving is more than 1200t. The reduction of energy consumption directly reduces the emission of harmful components such as sulfur gas and smoke & dust,etc. The annual energy consumption cost is saved over 600,000 Chinese yuan(CNY) (500 yuan< CNY > per ton of standard coal).

2.2 Advantages of solid waste utilization:
Solid waste has two different characteristics: one is the possibility of high plasticity, high water content, high shrinkage and high sensitivity, such as river, lake mud, urban sludge, construction foundation excavation or drilling sludge, urban subway underground channel slag, oil well drilling slag mud and other brick making; the other is low plasticity, low viscosity and low crack resistance, such as slag, fly ash, chemical slag, building soil and so on. Although the former has a high plasticity index and is easy to extrude, these solid waste materials are easy to deform and crack when they are made by one-time code firing process. Although the latter has a low plasticity index and is extruded under high extrusion pressure and high vacuum degree, due to the dispersion of raw materials andthe characteristics of not easy to polymerize, the use of one-time code firing will often cause fracturing and affect the firing yield. However, there are no pressure deformation and cracking problems when using the secondary code firing dryer, single layer or low layer drying. Fig. 2 the following picture shows the primary code firing kiln of fly ash in a factory. Due to the principle error of the manufacturer’s process route and code way, the 4-5 layers under the brick stack are all waste products due to fracturing and other reasons. This kind of raw material should be burnt in two times. This kind of dryer is more suitable for recycling all kinds of solid waste.

2.3 Advantages of brick billet body drying:
The dryer developed by Baoshen group can draw the residual heat from the cooling belt of the kiln through the pipeline and enters the dryer in multiple points. The clean hot air passes through the billet body from the bottom to the top, and there are multiple circulation fans, so as to ensure the consistency of section temperature, pressure and humidity of different sections of the dryer, ensure the uniform heating and free shrinkage around the body, and avoid Shrinkage stress crack due to drying. Due to the forming level and the change of raw materials, the speed of chain plate is changed accordingly at any time, and the drying cycle is adjusted to ensure that the qualified rate of drying is almost 100%.

2.4 Advantages of product Improvement:
With China national comprehensive ban policy concern the production of solid clay brick gradually strengthened, the dryer developed and manufactured by Baoshen group is more suitable for the production of hollow bricks and blocks with energy-saving and heat preservation performance requirements.. The production of wall brick with decoration function can achieve no "embossing" on the strip surface and meet the requirements of masonry clear wall. No matter the product specifications and models are transformed to meet the market demand, the technical parameters of the dryer are adjusted in a wide range, which will lay a solid foundation for the enterprises’ future development of high-quality , diversified and multi specification products.
2.5. Waste steam emission advantages:
The emission of air pollution in brick and tile industry, smoke and dust particles and other indicators are greatly affected by the conversion of oxygen content and the air volume of moisture discharge. The dryer developed by Baoshen group has sufficient hot air exchange and oxygen content of about 18%. The daily output of 200000 porous bricks is less than 10m3 / h. If 40m3 air volume is required for evaporation of 1kg water, the air volume is more than 300000 m3. According to the calculation of 200000 fast 240 × 115 × 90mm porous bricks (21.6%) per day, the air volume of the new dryer is less than 10m3 / h, only about 1 / 3 of the traditional air volume. It not only saves electricity, but also helps to reach the standard after pollutant emission conversion. Due to the high temperature of the hot air, it is beneficial to reduce the air volume, which is also consistent with the theoretical calculation.

2.6. Advantages of firing operation:
After drying, the moisture content of the green body has dropped below the critical moisture content, and the drying shrinkage of the green body has basically stopped. Only the firing shrinkage is considered after re coding kiln, but the firing shrinkage is small, which ensures the stability of the green stack during firing. Since more than half a year of production, there has been no collapse of the tunnel kiln. The embossing, black center and shrinkage stress crack are eliminated or reduced. As far as the number of kiln layers is concerned, as long as the range of firing temperature is allowed, there is no problem that the number of kiln layers is more than 18. The length of the tunnel kiln can be shortened properly with the increase of the amount of billets.

2.7 advantages of construction and installation:
Factory made, short construction period, good quality, avoiding wet construction of tunnel drying chamber. New type dryer, on-site construction, installation, commissioning, short construction cycle, to achieve early production.

2.8 Advantages of design adjustment:
Adjustable for different raw materials and products, regarding to the size of the product specification,the length ,height and drying cycle of the dryer can be adjusted respectively;
according to the porosity of the product, the chain plate speed can be adjusted to change the drying cycle. Small size, low void rate or solid brick products can be stacked in 1-3 layers so as to improve the output. According to the temperature and pressure of air supply, the air inlet position and hot air circulation system can be adjusted. Baoshen dryer is equipped with temperature, pressure, humidity and wind speed sensors to realize the air flow balance of the dryer, the upper and lower temperatures are the same, the humidity of each drying section is kept constant, and the technical parameters of the dryer are adjusted more simply and conveniently.
3. [Cost comparative analysis]

Take the following Figure 3 of primary code firing and Figure 4 of secondary code firing for instance,e.g. 200,000 pieces output per day, 4.6-4.8m tunnel kiln. The cost of drying kiln, tunnel kiln and workshop in the traditional one-time code firing process is compared and analyzed, but it does not include the equipment before the billet cutter, desulfurization and dust removal, power distribution and automation equipment, road hardening and other expenses.

Figure 3: plan of traditional one-time code firing process

Figure 4: process plan of the second code firing of the dryer of Baoshen group

3.1. Traditional one-time code burning process:
The process occupies a leading position in the existing brick factory, and its cost is: ① a tunnel drying room (calculated as 90m for example), including civil engineering, foundation work, fan, jacking machine, exit pulling machine, track, track foundation, track installation, three drying doors, air supply and tide discharge pipes, etc., with an estimated cost of 950,000 Chinese yuan (CNY); ② The roasting tunnel kiln is calculated as 140m, including the civil engineering, foundation and slab positioning machine of the tunnel kiln; the estimated cost is 3.5 million Chinese yuan (CNY); ③ 160 kiln cars are needed for drying, burning and the estimated cost is 4 million Chinese yuan (CNY); ④ the estimated cost is 700,000 Chinese yuan (CNY) for the top car machine, exit pulling machine, track, track foundation, track installation, 3 kiln doors, pipes on the kiln, etc.; ⑤ the workshop is about 9600 square meters. The simple workshop is calculated as 260 Chinese yuan (CNY) / square meter, and the estimated cost is 2.5 million Chinese yuan (CNY); ⑥ the estimated price of the whole rotary billet machine system is 450,000 Chinese yuan (CNY). The above total estimate is 12.1 million Chinese yuan (CNY).

3.2. The second code firing dryer of Baoshen group:
① The estimated cost of tunnel kiln is 3.1 million Chinese yuan (CNY) based on 120m;
② Approx.65 kiln cars are needed, with an estimated cost of 1.63 million Chinese yuan (CNY);
③ The estimated cost of overhead crane, exit puller, track, track foundation, track installation, three kiln doors, and kiln pipes, etc. is 350,000 Chinese yuan (CNY);
④ The estimated cost of dryer: including kiln body, code dryer, code kiln car, etc. is 5.05 million Chinese yuan (CNY);
⑤ The plant is about 7200m2. The simple workshop is calculated as 260 Chinese yuan (CNY)/ m2, and the estimated cost is 1.87 million Chinese yuan (CNY). The above total estimated cost is 12.15 million RMB yuan (CNY).

3.3 Estimation of existing secondary code burning:
① Code burning system: including transport and grouping, pallet transportation and loading and unloading, code machine, dry blank grouping, 2 code kiln car robots, control system, etc., with an estimated price of 4.45 million Chinese yuan (CNY);
② Drying equipment: including 90 cyclones, 4 drying ferries, 2 drying traction positioning, 120 drying cars, 1920 pallets, etc.with an estimated price of 10.7 million Chinese yuan (CNY);
③ The estimated cost of tunnel kiln is 3.1 million Chinese yuan (CNY);
④ There are 65 kiln cars, with an estimated cost of 1.63 million Chinese yuan (CNY);
⑤ There are three kiln doors and pipes on the kiln, with an estimated cost of 350000 Chinese yuan (CNY);
⑥ The construction of drying room, including civil engineering and track installation, with an estimated cost of 1.9 million Chinese yuan (CNY);
⑦ There are 9500m2 workshops, with an estimated cost of 2.47 million yuan. The above total estimated cost is 24.6 million RMB yuan (CNY).

3.4 cost comparison and analysis

(1) Traditional one-time code burning: the estimated cost is 12.1 million Chinese yuan (CNY).Two natural dehydration cooling channels are considered: the estimated cost is 13.6 million Chinese yuan (CNY).

(2) Secondary code burning: the estimated cost is 24.6 million Chinese yuan (CNY).

(3) Baoshen dryer: the estimated cost is 12.15 million RMB yuan (CNY).

Based on the analysis of the above estimated cost, the dryer of Baoshen group’s second code is 50,000 Chinese yuan (CNY) higher than that of the first code procedure, only 0.41% higher. If considering the natural dehydration of two cooling channels after forming, the estimated cost is increased by more than 1.5 million Chinese yuan (CNY), 12% higher than the cost of the new dryer. Compared with the existing process of the second code procedure, the dryer of Baoshen group is 12.25 million Chinese yuan (CNY)lower, 49.8% lower. This comparative analysis fully shows that Baoshen group’s new type of secondary code firing dryer solution is one of the first options for new construction and transformation of brick and tile enterprises, which not only ensure the brick billets and finished products’ qualities are excellent, but also achieve outstanding price advantages and good market prospects..

4. [Peroration]

The technical solution of chain plate twice code firing fast drying kiln is in the leading position in the world and the first technical know-how in China, which fills the blank of drying equipment technology in the industry. Compared with the traditional drying kiln, it is simple in structure, convenient in construction, economical and practical, energy-saving and efficient, and even in drying,There is no waste product, which can meet the production requirements of hollow brick, sintered thermal insulation block and decorative clear water wall sintered brick, shorten the drying cycle, and provide the thermal efficiency of brick making. It is more than 12 million Chinese yuan (CNY)lower than the cost of the secondary code burning workmanship in the current market.One-time investment of code burning, which can ensure the realization of secondary code burning, and the process is simple and efficient. It will surely bring tangible benefits and substantial improvement of product quality for more enterprises both home and abroad in brick making industry

Baoshen Chain plate Rapid continuous drying kiln, which is the leading solution in the world and the first in China, fills the blank in the industry. The cost can be saved by more than 40%. Investing in one-time code burning can realize secondary code burning, and the process flow is simple and efficient; This equipment will certainly bring substantial economic benefits and product quality improvement to many enterprises in brick industry globally.

Baoshen Group always puts the reliability and stability of its products first, and continues to innovate, adhering to the win-win business philosophy with customers; We promise to "deliver satisfactory products to customers at the fastest speed; solve problems encountered by customers in the use process with the best solution; and solve their worries with the most warm and thoughtful after-sales services".

The future is promising and the business opportunities are unlimited; Baoshen Group sincerely welcomes new and old customers both home and abroad, colleagues from all walks of life, and industry friends to negotiate cooperation and join hands to create a better future!

（Edited by Edmund Meng）

[References]

[1]. Lin Yongchun
- General Manager of BaoshenGroup
- Excellent individual of national building materials industrial machinery standardization;
- Exellent leader of National Building Materials Industry Quality Management Group Activities;
- The excellent worker of national building materials machinery industry standardization in 2010
- Excellent worker of building materials machinery industry standardization in 2011;
- The honorary title of outstanding leader of national building materials industry quality in 2012;
- Outstanding enterpreneur of national building materials machinery industry in 2013;
- Building Industry Standard Innovation Award in 2015;

- A drafter of JC/T662.2011 Mixsing-extruder Used in Walling Materials Industry;
- Executive director of the fifth Council of China Brick & Tiles Industrial Association;

- Chinese Professional Manager Qualification Certificate holder;

- ZPM690x3x2 automatic setting machine wins the second prize of the national Building;

- A member of techical committee for standardization of national building materials industry machinery;

- A member of technical committee for standardization of national building materials equipment;

- Excellent individual of Shaanxi Building Materials Industry;
- The first prize of Shaanxi Building Materials Industry Technology Innovation Award;
- The Third Prize of Shaanxi Science & Technology Award;
- The Ninth Youth Science and Technology Award of Shaanxi Province;
- The vacuum extruding,setting and carrying production line wins the second prize of Building Materials Industry Technology Innovation Award;
- Youth shock worker
- The outstanding builder of socialist cause with Chinese Characteristics of Shaanxi Province;
- Youth Science and Technology Award of Shaanxi Province;
- Broker Qualification Certificate holder;
- Excellent rural practical talent title of Baoji city;
- “star of Start-ups” of Baoji city in 2009;
- Excellent Communist Party Member of Non-Public-owned Enterprise of Baoji city;
- ZMP690x3x2 Automatic Setting Machine wins the second prize of Science and Technology Award of Baoji city;
- Deputy to the people’s congress of Baoji city;
- Model Worker title of Baoji city;
- Excellent Private Technopreneur;
- The Outstanding Builder of Socialist Cause With Chinese Characteristics of Baoji city.

[1].Zhang Jun Cang
- Senior engineer of Baoshen Group.

[1]. Shi Xiaoming
- Senior engineer of Baoshen Group.

[2]. Yan Kaifang
- Vice president of national wall material science and technology information network;
- Vice president of China building materials Xianyang ceramic research and Design Institute and China building materials Xi’an wall material research and Design Institute.

Baoshen Chain Plate Rapid Continuous Drying Kiln Technical Advantages & Features And Successful Projects