High-temperature power generation double-chamber kiln with combustion-supporting air auxiliary heating

Abstract

The application discloses a high-temperature power generation double-chamber kiln with combustion-supporting air auxiliary heating, and relates to the technical field of double-chamber kilns.The kiln comprises two kiln chambers, one of which is a main combustion chamber and the other is an auxiliary heating chamber; the combustion-supporting air system comprises a preheater, a burner and an air supply pipeline; the preheated combustion-supporting air is sent into the two kiln chambers through the combustion-supporting air system; each kiln chamber is provided with a channel on one side, and the top and bottom of each channel are fixed with refractory materials; the air supply pipeline has two air supply ends, and one air supply end of the air supply pipeline extends into one channel; the combustion-supporting air system can heat up to 600 DEG C; the kiln chamber is provided with a power generation device which is connected with a waste heat recovery component in the kiln chamber; the two kiln chambers can be heated and the heat in the kiln chambers can be quickly supplemented, so that the heating time of the kiln chamber is shortened, and the combustion efficiency and energy utilization rate are improved.

Description

Technical Field

[0001] This utility model relates to the field of double-chamber kiln technology, and in particular to a high-temperature power generation double-chamber kiln with combustion air auxiliary heating. Background Technology

[0002] High-temperature power generation dual-chamber kilns mainly consist of two independent kiln chambers connected by specific channels. During actual operation, in the kiln chamber switching phase, the temperature of the previously operating kiln chamber drops rapidly after combustion ceases, while the newly started kiln chamber has a lower initial temperature. If relying solely on its own combustion system for heating, it not only takes a long time but also leads to fuel waste and increased emissions due to incomplete initial combustion. Furthermore, when processing materials with high moisture or high melting points, the basic heat capacity within the kiln chamber may not be sufficient to meet the rapid heating and reaction requirements of the materials, easily resulting in uneven heating and low reaction efficiency. Simultaneously, when the ambient temperature is low or the kiln's insulation performance is compromised, the heat dissipation from the kiln chamber increases, making it difficult for the main combustion system alone to maintain stable high-temperature conditions, thus affecting power generation efficiency and product quality.

[0003] Therefore, to address the above issues, a high-temperature power generation double-chamber kiln with combustion air-assisted heating is proposed. The combustion air-assisted heating can quickly replenish heat, shorten the kiln heating time, ensure stable kiln temperature, and improve combustion efficiency and energy utilization. Utility Model Content

[0004] This application provides a high-temperature power generation double-chamber kiln with combustion air-assisted heating, which solves the problems in the prior art where the basic heat in the kiln chamber is not enough to meet the rapid heating and reaction requirements of materials, easily leading to uneven heating and low reaction efficiency.

[0005] This application provides a high-temperature power generation double-chamber kiln with combustion air auxiliary heating, including two kiln chambers, one of which is the main combustion chamber and the other is the auxiliary heating chamber. It also includes a combustion air system, which includes a preheater, a burner, and an air supply duct. The preheated combustion air is sent into the two kiln chambers through the combustion air system. A power generation device is installed on the kiln chamber, which is connected to the waste heat recovery component inside the kiln chamber. The power generation device converts the heat energy of the high-temperature flue gas generated in the kiln chamber into electrical energy.

[0006] Furthermore, each of the kiln chambers is equipped with a channel on one side, and refractory material is fixed to the top and bottom of each channel. The air supply pipe has two air supply ends, and one air supply end of the air supply pipe extends into one channel. The combustion air system is capable of heating up to 600°C.

[0007] Furthermore, each of the kiln chambers is equipped with a temperature sensor, which is used to monitor temperature changes inside the kiln chamber in real time.

[0008] Furthermore, the kiln chamber is provided with a preheating zone, a calcination zone and a cooling zone from top to bottom, and a kiln shell is fixed at the bottom of the kiln chamber; Multiple spray guns are fixed at uniform intervals within the preheating zone, and the nozzle of each spray gun is located in the calcination zone.

[0009] Furthermore, reinforcing ribs are evenly spaced and fixed on the outer side of the kiln shell, and a feeding device is installed on one side of the kiln chamber for conveying materials.

[0010] Furthermore, a hopper is fixed to the discharge end of the feeding device, and a distribution pipe is fixed below the hopper; The kiln chamber has two chambers, and there are two discharge ends below the distribution pipe. One discharge end of the distribution pipe extends into one of the kiln chambers.

[0011] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages: By using the combustion-supporting air system, auxiliary heating can be applied to the two kiln chambers, quickly replenishing the heat inside the kiln chambers, shortening the kiln chamber heating time, and ensuring stable temperature inside the kiln chambers. This improves combustion efficiency and energy utilization. Excess combustion-supporting air can be used for power generation or directly generated, enabling efficient use of existing resources and energy conservation and emission reduction. Attached Figure Description

[0012] Figure 1 This is a front view schematic diagram of the high-temperature power generation double-chamber kiln with combustion air-assisted heating of this utility model; Figure 2 This is a schematic diagram showing the positional relationship between the kiln chamber and the exhaust gas pipe of the high-temperature power generation double-chamber kiln with combustion air auxiliary heating of this utility model. Figure 3 This is a schematic diagram of the internal cross-sectional structure of the high-temperature power generation double-chamber kiln with combustion air-assisted heating according to this utility model. Figure 4 This is a top view schematic diagram of the high-temperature power generation double-chamber kiln with combustion air-assisted heating of this utility model. Figure 5 This is a schematic diagram of the cross-sectional structure of the high-temperature power generation double-chamber kiln with combustion air auxiliary heating according to this utility model.

[0013] In the diagram: 1. Kiln chamber; 2. Spray gun; 3. Preheating zone; 4. Calcination zone; 5. Kiln shell; 6. Feeding device; 7. Hopper; 8. Distribution pipe; 9. Steel ladder; 10. Exhaust pipe; 11. Suspension cylinder; 12. Passageway. Detailed Implementation

[0014] To facilitate understanding of this utility model, a more comprehensive description of this application will be given below with reference to the accompanying drawings, which show preferred embodiments of the utility model. However, the utility model can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to enable a more thorough and complete understanding of the disclosure of this utility model.

[0015] It should be noted that the terms "vertical," "horizontal," "up," "down," "left," "right," and similar expressions used in this article are for illustrative purposes only and do not represent the only possible implementation.

[0016] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains; the terminology used herein in the description of this invention is for the purpose of describing particular embodiments only and is not intended to limit the invention; the term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0017] like Figures 1 to 5 As shown, this application provides a high-temperature power generation double-chamber kiln with combustion air auxiliary heating, including a kiln chamber 1, which has two chambers, one of which is the main combustion chamber and the other is the auxiliary heating chamber. It also includes a combustion air system, which includes a preheater, a burner, and an air supply duct. The input end of the preheater is connected to an external air source to preheat the incoming air. Its output end is connected to the burners in the main combustion chamber and the auxiliary heating chamber through the air supply duct. The burners are installed on the kiln chamber 1 and can fully mix the preheated combustion air with the fuel and carry out the combustion reaction. The air supply duct is set according to the working requirements of the double-chamber kiln to realize the independent adjustment and distribution of the combustion air volume of the main combustion chamber and the auxiliary heating chamber through the valve assembly, so as to ensure that the two kiln chambers 1 can obtain a suitable combustion air supply at different operating stages. The preheated combustion air is sent into the two kiln chambers 1 through the combustion air system. A power generation device is installed on the kiln chamber 1. The power generation device can be a gas turbine or a steam turbine, etc. The power generation device is connected to the waste heat recovery component in the kiln chamber 1. The power generation device converts the heat energy of the high-temperature flue gas generated in the kiln chamber 1 into electrical energy, realizing the cascade utilization of energy. When the air volume generated by the combustion air system exceeds the combustion requirements of the kiln chamber 100, this excess combustion air can be introduced into the power generation device to drive the generator to generate electricity using its kinetic and thermal energy.

[0018] It should be noted that the external air is heated by the preheater and then sent into the two kiln chambers 1 by the combustion air system. The fuel in the main combustion chamber is fully burned under the combustion assistance of the combustion air. Part of the high-temperature flue gas generated is used directly to heat the material in the kiln, and the other part enters the auxiliary heating chamber to exchange heat with the combustion air introduced into the auxiliary heating chamber, further increasing the temperature of the combustion air.

[0019] Specifically, such as Figures 1 to 5 As shown, each kiln chamber 1 has a channel 12 installed on one side. The top and bottom of each channel 12 are fixed with refractory material. The combustion air system can heat up to 600℃. The air supply pipe has two air supply ends, and one air supply end of the air supply pipe extends into one channel 12.

[0020] It should be noted that the combustion air system heats the kiln chamber 1 to 600℃, which better assists the combustion of materials, accelerates the combustion efficiency of materials, and adds 2-4 fans to ensure sufficient air volume for self-use and power generation.

[0021] Specifically, such as Figures 1 to 5 As shown, each kiln chamber 1 is equipped with a temperature sensor, which is used to monitor the temperature changes inside the kiln chamber 1 in real time.

[0022] Specifically, such as Figures 1 to 3 As shown, the kiln chamber 1 is provided with a preheating zone 3, a calcination zone 4 and a cooling zone from top to bottom, and a kiln shell 5 is fixed at the bottom of the kiln chamber 1. Multiple spray guns 2 are fixed at even intervals within the preheating zone 3, and the nozzle of each spray gun 2 is located in the calcination zone 4.

[0023] A hanging cylinder 11 is fixed on the kiln shell 5. The outer side of the hanging cylinder 11 adopts heat pipes and double-layer air ducts, and the inner side is fixed with refractory material, which can further reduce heat loss. The kiln shell 5 and the hanging cylinder 11 are integrated design and assembled installation. The temperature of the kiln shell 5 is controlled between 50℃ and 100℃.

[0024] It should be noted that the kiln shell 5 is divided into an upper space and a lower space. The upper space is equipped with heat pipes and double-layer air ducts, and the lower space adopts a double-layer air duct design.

[0025] Specifically, such as Figures 1 to 4 As shown, reinforcing ribs are evenly spaced and fixed on the outer side of the kiln shell 5. The reinforcing ribs are used to enhance the structural strength of the kiln shell 5. A feeding device 6 is installed on one side of the kiln chamber 1. The feeding device 6 is used to transport materials.

[0026] Specifically, such as Figures 1 to 3 As shown, a hopper 7 is fixed at the discharge end of the feeding device 6, and a distribution pipe 8 is fixed below the hopper 7. There are two kiln chambers 1, and two discharge ends below the distribution pipe 8. One discharge end of the distribution pipe 8 extends into one kiln chamber 1. Multiple platforms are mounted on the kiln chamber 1, and steel ladders 9 are installed between adjacent platforms. An exhaust pipe 10 is fixed to the top of the kiln chamber 1.

[0027] In actual use, the high-temperature power generation double-chamber kiln with combustion air auxiliary heating according to the embodiment of this application feeds the material into the kiln chamber 1 through the feeding device 6. During operation, the external air is heated by the combustion air system through the preheater and then sent into the channels 12 of the two kiln chambers 1 through the air supply pipe. The fuel in the main combustion chamber is fully burned under the combustion assistance of the combustion air. Part of the generated high-temperature flue gas is directly used to heat the material in the kiln, and the other part enters the auxiliary heating chamber. The combustion air introduced into the auxiliary heating chamber undergoes heat exchange through the heat pipe to further increase the temperature of the combustion air. The heated combustion air is then circulated back into the main combustion chamber to form an efficient heat utilization loop. The temperature change in the kiln chamber 1 is monitored in real time by the temperature sensor, and the supply of combustion air and the preheating temperature are automatically adjusted. When the temperature of the main combustion chamber reaches the set threshold, the control system starts the heat exchange process of the auxiliary heating chamber. Otherwise, it switches to the enhanced combustion mode of the main combustion chamber to achieve dynamic balance of the dual-chamber coordinated operation. When the air volume generated by the combustion air system exceeds the combustion requirements of kiln chamber 1, the excess combustion air can be introduced into the power generation device. The power generation device uses the kinetic and thermal energy contained in the excess combustion air to drive the generator to generate electricity. The generated electricity can not only meet the equipment operation requirements of the double-chamber kiln itself, but also feed the excess electricity into the power grid to provide power support to the outside world. This significantly improves the overall energy utilization efficiency and economic benefits of the entire double-chamber kiln system. At the same time, this power generation method does not require additional fuel consumption, can perform secondary efficient conversion of existing energy, can fully realize the cascade utilization of energy, avoid the energy waste caused by the direct emission of excess combustion air, and improve the environmental friendliness of the equipment.

[0028] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. For those skilled in the art, various modifications and variations are possible with this utility model. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A high-temperature power generation double-chamber kiln with combustion air-assisted heating, comprising a kiln chamber (1), characterized in that, The kiln chamber (1) has two chambers, one of which is the main combustion chamber and the other is the auxiliary heating chamber. It also includes a combustion air system, which includes a preheater, a burner and an air supply duct. The preheated combustion air is sent into the two kiln chambers (1) through the combustion air system. A power generation device is installed on the kiln chamber (1), which is connected to the waste heat recovery component inside the kiln chamber (1). The power generation device converts the heat energy of the high-temperature flue gas generated in the kiln chamber (1) into electrical energy.

2. The high-temperature power generation double-chamber kiln with combustion air-assisted heating as described in claim 1, characterized in that, Each of the kiln chambers (1) is equipped with a channel (12) on one side. The top and bottom of each channel (12) are fixed with refractory material. The air supply pipe has two air supply ends, and one air supply end of the air supply pipe extends into one channel (12). The combustion air system is capable of heating up to 600°C.

3. The high-temperature power generation double-chamber kiln with combustion air-assisted heating as described in claim 1, characterized in that, Each of the kiln chambers (1) is equipped with a temperature sensor, which is used to monitor the temperature changes inside the kiln chamber (1) in real time.

4. The high-temperature power generation double-chamber kiln with combustion air-assisted heating as described in claim 1, characterized in that, The kiln chamber (1) is provided with a preheating zone (3), a calcination zone (4) and a cooling zone from top to bottom, and a kiln shell (5) is fixed at the bottom of the kiln chamber (1). Multiple spray guns (2) are fixed at uniform intervals within the preheating zone (3), and the nozzle of each spray gun (2) is located in the calcination zone (4).

5. The high-temperature power generation double-chamber kiln with combustion air-assisted heating as described in claim 4, characterized in that, The outer side of the kiln shell (5) is fixed with reinforcing ribs at even intervals, and a feeding device (6) is installed on one side of the kiln chamber (1). The feeding device (6) is used to transport materials.

6. The high-temperature power generation double-chamber kiln with combustion air-assisted heating as described in claim 5, characterized in that, The feeding device (6) has a hopper (7) fixed at its discharge end, and a distribution pipe (8) is fixed below the hopper (7). The kiln chamber (1) has two parts, and there are two discharge ends below the distribution pipe (8). One discharge end of the distribution pipe (8) extends into one of the kiln chambers (1).

Images