Rapid drying kiln for recycled aggregate high-alumina bricks

Abstract

The utility model provides a rapid drying kiln for recycled aggregate high-alumina bricks, which comprises a plurality of kilns which are connected in series and at least comprise a front kiln and a rear kiln, the bottom of the rear kiln is connected with a high-temperature kiln waste heat outlet pipe, and a furnace top air outlet pipe is communicated with a front kiln air inlet pipe through dehumidification equipment; a hot air port and a movable track are arranged on the ground of the kiln; a connecting workshop, an observation window, an openable door and a transverse rail are arranged between the front kiln and the rear kiln; automatic opening and closing furnace doors are arranged at two ends of the kiln. According to the utility model, the waste heat of the high-temperature kiln is efficiently utilized, the green bricks are uniformly dried, the green brick transfer efficiency is improved, the operation convenience and safety are enhanced, and the production quality and efficiency of high-alumina bricks are improved.

Description

Technical Field

[0001] This utility model relates to the technical field of high alumina brick production equipment, and more specifically, to a rapid drying kiln for high alumina bricks made from recycled aggregate. Background Technology

[0002] In the production of high-alumina bricks, especially when using recycled aggregates, the drying process of the brick blanks is crucial. Traditional high-alumina brick drying methods have many shortcomings.

[0003] First, energy efficiency is low. Most traditional drying kilns do not effectively recover and utilize the waste heat generated by the high-temperature kiln. Instead, they use separate heating equipment to dry the brick blanks. This not only consumes a lot of energy and increases production costs, but also does not meet the current environmental protection requirements for energy conservation and emission reduction.

[0004] Secondly, the drying effect is difficult to guarantee. The unreasonable hot air circulation method of traditional kilns leads to uneven heating of the brick blanks during the drying process, which can easily result in localized areas drying too quickly or too slowly. Drying too quickly may cause the surface of the brick blanks to crack, affecting product quality; drying too slowly will prolong the production cycle and reduce production efficiency.

[0005] Furthermore, the handling and transfer of brick blanks is inconvenient. In traditional kilns, the transfer of brick blanks often relies on manual labor, which is not only labor-intensive but also inefficient. At the same time, improper handling during manual handling may damage the brick blanks, further increasing the scrap rate.

[0006] Furthermore, traditional kilns lack flexibility and operability in their structural design. For example, operators find it difficult to observe the drying status of the brick blanks in real time, and cannot easily adjust or transfer the brick blanks during the drying process, which is not conducive to precise control of the production process. Utility Model Content

[0007] Based on the above-mentioned technical problems, this utility model proposes a rapid drying kiln for high-alumina bricks made from recycled aggregate.

[0008] A rapid drying kiln for high-alumina bricks made from recycled aggregate includes: multiple kilns connected in series, each kiln including at least a front kiln and a rear kiln; the bottom of the rear kiln is provided with a connecting inlet for introducing high-temperature flue gas, and the top of the rear kiln is provided with an exhaust pipe connected to the air inlet pipe of the front kiln; a dehumidification device is provided on the exhaust pipe; a moving track with a drive is provided on the ground of the front and rear kilns, the moving track being used to move the brick frame; a connecting workshop is provided between the front and rear kilns, the connecting workshop having an observation window on the front and an openable door on the rear.

[0009] Furthermore, multiple evenly distributed hot air vents are provided on the ground inside the kiln, and the hot air vents of the front kiln and the rear kiln are respectively connected to the connecting inlet and the air inlet pipe.

[0010] Furthermore, an exhaust box is provided on the top of the kiln, and evenly distributed air inlets are provided on the lower side of the exhaust box. An air outlet pipe is connected to the upper end of the exhaust box.

[0011] Furthermore, a transverse track is provided inside the connecting workshop, which connects to the moving track, enabling the brick blank rack to be moved outward.

[0012] Furthermore, the high-temperature flue gas comes from the waste heat of the high-temperature kiln, and the connecting inlet is connected to the heat outlet pipe of the high-temperature kiln.

[0013] Furthermore, the kiln is equipped with automatically opening and closing doors at both ends.

[0014] Beneficial effects:

[0015] 1. High efficiency and energy saving: This utility model introduces the waste heat of the high-temperature kiln into the kiln system, realizing the recycling of waste heat, greatly reducing the consumption of additional energy, lowering production costs, and conforming to the development trend of energy conservation and environmental protection. Compared with the traditional drying method, the energy utilization rate can be significantly improved, effectively saving energy resources.

[0016] 2. High drying quality: Through the reasonable setting of hot air inlets and exhaust boxes, as well as the control of humidity and temperature of high-temperature flue gas, the brick blanks can be heated evenly during the drying process, avoiding quality problems such as brick blank cracking caused by uneven drying, and improving the finished product quality and pass rate of high alumina bricks.

[0017] 3. Improved production efficiency: The installation of the moving track and the connecting horizontal track in the workshop enables automatic transfer and flexible operation of the brick blank rack, reduces manual handling, improves the efficiency of brick blank transfer, shortens the production cycle, and thus improves overall production efficiency.

[0018] 4. Enhanced ease of operation and safety: The observation window allows operators to monitor the drying status of the brick blanks in real time and make timely adjustments; the automatically opening and closing furnace door ensures the sealing and safety of the kiln, while also facilitating the entry and exit of brick blanks. These designs improve the operability and safety of the production process and reduce the labor intensity and safety risks for operators. Attached Figure Description

[0019] Figure 1 A schematic diagram of the system of this utility model is shown;

[0020] Figure 2 A schematic diagram of the structure of the kiln of this utility model is shown. Figure 1 ;

[0021] Figure 3 A schematic diagram of the structure of the kiln of this utility model is shown. Figure 2 ;

[0022] In the attached diagram, 1 is the rear kiln, 2 is the front kiln, 3 is the brick rack, 4 is the heat outlet pipe, 5 is the exhaust box, 6 is the air outlet pipe, 7 is the dehumidification equipment, 8 is the air inlet pipe, 9 is the connecting workshop, 10 is the observation window, 11 is the hot air outlet, 12 is the moving track, 13 is the connecting entrance, and 14 is the furnace door. Detailed Implementation

[0023] To better understand the above-mentioned objectives, features, and advantages of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0024] like Figures 1-3 The diagram shows a rapid drying kiln for high-alumina bricks made from recycled aggregate. The overall structure of the kiln includes multiple kilns connected in series, including at least a front kiln 2 and a rear kiln 1. This series structure provides a basic framework for the orderly utilization of waste heat and the continuous drying of brick blanks. The series connection of multiple kilns allows high-temperature flue gas to be transferred sequentially between different kilns, making full use of waste heat and facilitating the staged drying of brick blanks.

[0025] Waste heat introduction and treatment: The bottom of the rear kiln 1 is provided with a connection inlet 13 for introducing high-temperature flue gas. This connection inlet 13 is connected to the heat outlet pipe 4 of the high-temperature kiln, so that the waste heat generated by the high-temperature kiln can smoothly enter the rear kiln 1 in the form of high-temperature flue gas. The top of the rear kiln 1 is provided with an air outlet pipe 6, which is connected to the air inlet pipe 8 of the front kiln 2. A dehumidification device 7 is installed on the air outlet pipe 6. After the high-temperature flue gas enters the rear kiln 1, it performs preliminary drying on the brick blanks in the rear kiln 1 as it flows upward. Then, the flue gas enters the dehumidification device 7 through the air outlet pipe 6 to remove the moisture in it, so as to avoid the moisture from adversely affecting the drying of the brick blanks in the front kiln 2. The dehumidified flue gas then enters the front kiln 2 through the air inlet pipe 8 to continue drying the brick blanks in the front kiln 2. This design not only realizes the full utilization of the waste heat of the high-temperature kiln, but also can reasonably adjust the drying speed of the brick blanks by controlling the humidity and temperature of the flue gas, effectively preventing the brick blanks from cracking due to excessive drying.

[0026] Hot air circulation optimization: Multiple evenly distributed hot air inlets 11 are set on the ground inside the kiln. The hot air inlets 11 of the front kiln 2 and the rear kiln 1 are connected to the connecting inlet 13 and the air inlet pipe 8, respectively. The setting of the hot air inlets 11 can make the high temperature flue gas entering the kiln more evenly distributed in the kiln, thereby achieving uniform heating and drying of the brick blanks. The evenly distributed hot air can flow upward from the bottom of the brick blanks, making full contact with the brick blanks, avoiding uneven drying in some areas, and improving the drying quality.

[0027] Flue gas exhaust and collection: An exhaust box 5 is installed on the top of the kiln. Evenly distributed air inlets are set on the lower side of the exhaust box 5. The upper end of the exhaust box 5 is connected to the exhaust pipe 6. The exhaust box 5 collects the flue gas after drying the brick blanks in the kiln through the air inlets, and then transports it to the front kiln 2 or out of the kiln system through the exhaust pipe 6. This design helps to maintain the airflow balance in the kiln, ensures the stable flow of hot air, and can also effectively discharge the waste gas generated during the drying process, creating a good environment for drying the brick blanks.

[0028] Convenience of brick transfer and operation: Movable tracks 12 are installed on the ground of both the front kiln 2 and the rear kiln 1. These tracks move the brick racks 3 automatically within the kilns, eliminating the need for manual handling and significantly improving the efficiency of brick transfer. This reduces labor intensity and the risk of damage caused by manual handling. A connecting workshop 9 is located between the front kiln 2 and the rear kiln 1. A transverse track connects to the movable tracks 12, allowing the brick racks 3 to be moved outwards. An observation window 10 is located at the front of the connecting workshop 9, and an openable door at the rear. Operators can observe the drying status of the bricks in the front kiln 2 in real time through the observation window 10 and adjust production parameters accordingly. When pre-dried bricks need to be moved out of the front kiln 2 ahead of schedule, the rear door can be opened, and the transverse track can be used to move the brick racks 3 outwards, facilitating flexible control of the brick processing flow.

[0029] Kiln sealing and safety: Automatically opening and closing kiln doors 14 are installed at both ends of the kiln. The automatic opening and closing kiln doors 14 can be easily opened and closed when brick blanks enter and exit the kiln. At the same time, they maintain good sealing during kiln operation to prevent hot gas leakage, ensure the stability of temperature and airflow inside the kiln, improve energy utilization efficiency, and enhance the safety of kiln operation.

[0030] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A rapid drying kiln for high-alumina bricks made from recycled aggregate, characterized in that, include: Multiple kilns are arranged in series, including at least a front kiln and a rear kiln. The bottom of the rear kiln is provided with a connection inlet for introducing high-temperature flue gas, and the top of the rear kiln is provided with an exhaust pipe, which is connected to the air inlet pipe of the front kiln. A dehumidification device is provided on the exhaust pipe. The ground of the front and rear kilns is provided with a moving track for moving the brick frame. A connecting workshop is provided between the front and rear kilns, with an observation window on the front and an openable door on the rear.

2. The rapid drying kiln for high-alumina bricks made from recycled aggregate according to claim 1, characterized in that, Multiple evenly distributed hot air vents are provided on the ground inside the kiln, and the hot air vents of the front kiln and the rear kiln are respectively connected to the connecting inlet and the air inlet pipe.

3. The rapid drying kiln for high-alumina bricks made from recycled aggregate according to claim 1, characterized in that, The kiln is equipped with an exhaust box on the top, with evenly distributed air inlets on the lower side of the exhaust box, and an exhaust pipe connected to the upper end of the exhaust box.

4. The rapid drying kiln for high-alumina bricks made from recycled aggregate according to claim 1, characterized in that, The connecting workshop is equipped with a transverse track, which connects to the moving track, allowing the brick blank rack to be moved outward.

5. The rapid drying kiln for high-alumina bricks made from recycled aggregate according to claim 1, characterized in that, The high-temperature flue gas comes from the waste heat of the high-temperature kiln, and the connection inlet is connected to the heat outlet pipe of the high-temperature kiln.

6. The rapid drying kiln for high-alumina bricks made from recycled aggregate according to claim 1, characterized in that, The kiln is equipped with automatically opening and closing doors at both ends.

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