Connecting structure of alternative fuel pipeline and decomposing furnace

Abstract

The utility model provides a connecting structure of an alternative fuel pipeline and a decomposing furnace, which belongs to the technical field of cement production decomposing furnace calcination and comprises a decomposing furnace and a tertiary air pipe arranged on the outer wall of the decomposing furnace and communicated with the decomposing furnace. The discharging chute is arranged on the outer wall of the decomposing furnace and is used for conveying alternative fuel into the decomposing furnace; according to the utility model, the alternative fuel enters the decomposing furnace through the blanking articulated chute, on one hand, air conveyed by the tertiary air pipe enters the decomposing furnace for reaction, and as the discharge port of the blanking articulated chute is positioned at the air inlet of the tertiary air pipe entering the decomposing furnace, the air conveyed by the tertiary air pipe can scatter the alternative fuel entering the decomposing furnace; and on the other hand, the air in the tertiary air pipe is also conveyed into the discharging articulated chute, and the air entering the discharging articulated chute can preheat the alternative fuel, so that the temperature of the alternative fuel in the decomposing furnace is increased, the moisture of the alternative fuel is reduced, and the fuel is fully combusted.

Description

Technical Field

[0001] This utility model relates to the field of calcination technology in cement production decomposition furnaces, specifically to a connection structure between an alternative fuel pipeline and the decomposition furnace. Background Technology

[0002] As the cement industry is an energy-dependent industry, minimizing the use of non-renewable resources and fully utilizing inferior raw materials and waste as alternative fuels to replace high-quality natural resources is crucial for reducing environmental pollution and improving the industry's sustainable development capabilities. Meanwhile, with increasing attention paid to environmental issues and energy conservation and emission reduction, most cement plants are using alternative fuels to replace raw coal. However, during the use of alternative fuels, issues such as fuel quality can cause significant fluctuations in the safety and stability of the calcination system, leading to problems such as rapid scaling, high CO levels causing strong drafts, and insufficient system capacity. The main reason for these problems is that the alternative fuel enters the precalciner at low temperatures and with excessive moisture, adversely affecting the combustion efficiency of the subsequent alternative fuel and the entire kiln system. Summary of the Invention

[0003] This utility model provides a connection structure between an alternative fuel pipeline and a decomposition furnace. The outlet of the alternative fuel feeding chute is located at the cut-off point of the tertiary air duct. At the same time, a preheating pipeline is led from the tertiary air duct to the alternative fuel feeding chute. On the one hand, the alternative fuel can be preheated in advance, and on the other hand, the residence time of the alternative fuel in the decomposition furnace is extended. At the same time, it is fully guaranteed that the alternative fuel entering the decomposition furnace is dispersed by the tangential air of the tertiary air entering the furnace, thereby achieving complete combustion.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A connection structure between an alternative fuel pipeline and a decomposition furnace, comprising a decomposition furnace, and further comprising:

[0006] A tertiary air duct is installed on the outer wall of the decomposition furnace and is connected to the decomposition furnace.

[0007] A feed chute, installed on the outer wall of the decomposition furnace, is used to transport alternative fuel into the furnace, and the discharge port of the feed chute is located at the cut-off point of the tertiary air duct; and

[0008] The preheating pipeline is located between the tertiary air duct and the discharge chute, and is used to guide the airflow in the tertiary air duct into the discharge chute to preheat the alternative fuel.

[0009] Preferably, the alternative fuel pipeline connection structure to the decomposition furnace further includes a auger device installed at the feed end of the feed chute.

[0010] Preferably, the feeding chute includes a feeding section connected to the feeding end of the auger device, a mixing section disposed at the discharge end of the feeding section, and a feeding section disposed at the discharge end of the mixing section, wherein the feeding section is connected to the inner cavity of the decomposition furnace.

[0011] Preferably, the material feeding section, mixing section, and unloading section are all square tubes.

[0012] Preferably, the material feeding section is inclined downward from the material feeding end of the auger device toward the mixing section, the mixing section is arranged parallel to the axial direction of the decomposition furnace on the outer wall of the decomposition furnace, and the material feeding section is inclined downward from the mixing section toward the decomposition furnace.

[0013] Preferably, the preheating pipeline includes a connecting pipe disposed between the tertiary air duct and the mixing section.

[0014] Preferably, the connecting pipe includes an extended pipe body extending outward from the tertiary air duct, a conveying pipe body extending outward integrally from the extended pipe body, and a connecting pipe body extending outward from the conveying pipe body to communicate with the mixing section.

[0015] Preferably, the outer wall of the connecting pipe is provided with an air volume regulating valve.

[0016] As can be seen from the above technical solution, the present invention has the following beneficial effects: In the present invention, the alternative fuel enters the decomposition furnace through the feeding chute. At the same time, the air transported through the tertiary air duct enters the decomposition furnace for reaction. Since the discharge port of the feeding chute is located at the air inlet of the tertiary air duct into the decomposition furnace, the air transported by the tertiary air duct can disperse the alternative fuel entering the decomposition furnace, so that the fuel can be fully burned. On the other hand, the air in the tertiary air duct is also transported to the feeding chute. The air entering the feeding chute can preheat the alternative fuel in advance, so as to increase the temperature of the alternative fuel entering the decomposition furnace and reduce the moisture in the alternative fuel, so as to further ensure the fuel is fully burned. In addition, the air introduced into the feeding chute by the tertiary air duct can also prolong the residence time of the alternative fuel in the decomposition furnace during the process of dispersing the alternative fuel, so as to fully ensure the combustion of the alternative fuel. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model.

[0018] In the diagram: 10, decomposition furnace; 20, tertiary air duct; 30, feeding chute; 310, material discharge section; 320, mixing section; 330, feeding section; 40, auger device; 510, outer tube body; 520, conveying tube body; 530, connecting tube body; 540, air volume regulating valve. Detailed Implementation

[0019] A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.

[0020] To achieve the above objectives, the embodiments of this utility model adopt the following technical solutions: (Refer to...) Figure 1 A structure connecting an alternative fuel pipeline to a decomposition furnace includes a decomposition furnace 10, a tertiary air duct 20, a feed chute 30, and a preheating pipeline. The tertiary air duct 20 is installed on the outer wall of the decomposition furnace 10 and is connected to the decomposition furnace. The tertiary air duct 20 is used to supply air into the decomposition furnace 10. The tertiary air duct plays a crucial role in the cement kiln system, such as providing combustion air, improving thermal efficiency, promoting the mixing of kiln gas and air, and protecting refractory materials, directly affecting the efficiency and stability of the cement kiln system. The feed chute 30 is installed on the outer wall of the decomposition furnace 10 and is used to supply alternative fuel into the decomposition furnace. The outlet of the feed chute 30 is located at the air inlet of the tertiary air duct 20 into the decomposition furnace 10, specifically at the side end of the air inlet of the tertiary air duct 20 into the decomposition furnace 10. This facilitates the sequential mixing of the alternative fuel with air and coal inside the decomposition furnace 10. The preheating pipeline is installed... Between the tertiary air duct 20 and the feed chute 30, airflow from the tertiary air duct is directed into the feed chute to preheat the alternative fuel. During operation, the alternative fuel enters the decomposition furnace via the feed chute. Simultaneously, air from the tertiary air duct enters the decomposition furnace for reaction. Since the feed chute outlet is located at the tertiary air duct inlet to the decomposition furnace, the air from the tertiary air duct disperses the alternative fuel entering the furnace, ensuring complete combustion. Furthermore, the air from the tertiary air duct is also supplied to the feed chute, preheating the alternative fuel and increasing its temperature within the furnace, thus reducing moisture content and further enhancing combustion. Additionally, the air introduced into the feed chute from the tertiary air duct, while dispersing the alternative fuel, extends its residence time within the furnace, ensuring optimal combustion.

[0021] As a preferred technical solution in this embodiment, the alternative fuel pipeline and the decomposition furnace connection structure further includes a auger device 40. The auger device 40 is set at the feed end of the feed chute 30. The presence of the auger device can further crush the alternative fuel entering the feed chute 30 to improve the combustion effect of the alternative fuel.

[0022] In some embodiments, the feeding chute 30 includes a feeding section 310, a mixing section 320, and a feeding section 330. The feeding section 310 is connected to the feeding end of the auger device 40, the mixing section 320 is disposed at the discharge end of the feeding section, and the feeding section 330 is disposed at the discharge end of the mixing section. Meanwhile, the feeding section is connected to the inner cavity of the decomposition furnace 10. In use, the alternative fuel conveyed by the auger device enters the feeding section and moves along the feeding section to the mixing section, and is finally conveyed into the decomposition furnace through the feeding section.

[0023] Furthermore, the feeding section 310, mixing section 320, and feeding section 330 are all square tubes. The feeding section 310 is inclined downward from the feeding end of the auger device 40 toward the mixing section 320. The mixing section 320 is axially parallel to the outer wall of the decomposition furnace 10. The feeding section 330 is inclined downward from the mixing section 320 toward the decomposition furnace 10. In this way, the alternative fuel can be transported along the inclined feeding section 310 to the mixing section 320, and the alternative fuel entering the mixing section 320 is preheated by the preheating pipeline. Then, the alternative fuel enters the decomposition furnace 10 through the inclined feeding section 330.

[0024] Furthermore, the preheating pipeline includes a connecting pipe disposed between the tertiary air duct 20 and the mixing section 320. The connecting pipe includes an extension pipe body 510, a conveying pipe body 520, and a connecting pipe body 530, and the extension pipe body 510, the conveying pipe body 520, and the connecting pipe body 530 are integrally formed pipe structures. In this embodiment, the preheating pipeline has an approximately Z-shaped structure. Specifically, the extension pipe body 510 extends outward from the tertiary air duct 20, the conveying pipe body 520 extends outward integrally from the extension pipe body, and the connecting pipe body 530 extends outward from the conveying pipe body to communicate with the mixing section 320. In this way, the preheating pipeline forms a passage from the tertiary air duct to the mixing section, which can deliver tertiary air into the mixing section to preheat the alternative fuel.

[0025] Furthermore, the outer wall of the connecting pipe is provided with an air volume regulating valve 540. The presence of the air volume regulating valve 540 can adjust the amount of air delivered to the discharge chute through the tertiary air duct, so as to achieve precise control of the air speed.

[0026] In use, the alternative fuel delivered by the auger device 40 passes sequentially through the feeding section 310, the mixing section 320, and the discharge section 330, and is then transported into the decomposition furnace 10. At the same time, part of the air delivered by the tertiary air duct 20 is directly transported into the decomposition furnace 10, while the other part enters the mixing section through the preheating pipe. The air entering the mixing section 320 can preheat the alternative fuel in the mixing section 320 to increase the temperature of the alternative fuel and reduce the moisture content. The preheated alternative fuel enters the decomposition furnace 10 through the discharge section 330. Since the outlet of the discharge chute 30, i.e. the outlet of the discharge section 330, is located at the air inlet of the tertiary air duct 20 into the decomposition furnace 10, the air delivered into the decomposition furnace 10 through the tertiary air duct 20 can disperse the alternative fuel entering the decomposition furnace 10 to achieve complete combustion of the alternative fuel.

[0027] The above-described embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of the present utility model. Various modifications and improvements made by those skilled in the art to the technical solutions of the present utility model without departing from the spirit of the present utility model should fall within the protection scope defined by the claims of the present utility model.

Claims

1. A connection structure between an alternative fuel pipeline and a decomposition furnace, comprising a decomposition furnace (10), characterized in that, Also includes: A tertiary air duct (20) is provided on the outer wall of the decomposition furnace (10) and is connected to the decomposition furnace. A feed chute (30) is installed on the outer wall of the decomposition furnace (10) for conveying alternative fuel into the decomposition furnace, and the outlet of the feed chute (30) is located at the air inlet of the tertiary air duct (20) into the decomposition furnace (10); and The preheating pipeline is located between the tertiary air duct (20) and the discharge chute (30) to guide the airflow in the tertiary air duct into the discharge chute to preheat the alternative fuel.

2. The alternative fuel pipeline and decomposition furnace connection structure according to claim 1, characterized in that, The alternative fuel pipeline connection structure to the decomposition furnace also includes a auger device (40) installed at the feed end of the feed chute (30).

3. The alternative fuel pipeline and decomposition furnace connection structure according to claim 2, characterized in that, The feeding chute (30) includes a feeding section (310) connected to the feeding end of the auger device (40), a mixing section (320) provided at the discharge end of the feeding section, and a feeding section (330) provided at the discharge end of the mixing section. The feeding section is connected to the inner cavity of the decomposition furnace (10).

4. The alternative fuel pipeline and decomposition furnace connection structure according to claim 3, characterized in that, The material feeding section (310), mixing section (320) and discharge section (330) are all square tubes.

5. The alternative fuel pipeline and decomposition furnace connection structure according to claim 4, characterized in that, The material feeding section (310) is inclined downward from the material feeding end of the auger device (40) toward the mixing section (320). The mixing section (320) is arranged parallel to the axial direction of the decomposition furnace (10) on the outer wall of the decomposition furnace. The material feeding section (330) is inclined downward from the mixing section (320) toward the decomposition furnace (10).

6. The alternative fuel pipeline and decomposition furnace connection structure according to claim 5, characterized in that, The preheating pipeline includes a connecting pipe disposed between the tertiary air duct (20) and the mixing section (320).

7. The alternative fuel pipeline and decomposition furnace connection structure according to claim 6, characterized in that, The connecting pipe includes an extension pipe body (510) extending outward from the tertiary air pipe (20), a conveying pipe body (520) extending outward integrally from the extension pipe body, and a connecting pipe body (530) extending outward from the conveying pipe body to communicate with the mixing section (320).

8. The alternative fuel pipeline and decomposition furnace connection structure according to claim 6, characterized in that, The outer wall of the connecting pipe is equipped with an air volume regulating valve (540).

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