Cement production exhaust gas discharge duct with deflector design

Abstract

This utility model relates to the field of waste gas emission technology and discloses a cement production waste gas emission pipe with a guide plate design. It includes an outer pipe and an inner pipe. A connecting plate is provided on one side of the inner wall of the outer pipe, and the inner pipe is connected to the connecting plate. The inner pipe is composed of a spiral exhaust pipe and a guide pipe. The guide pipe is connected to one end of the exhaust pipe, and one end of the guide pipe is funnel-shaped, meaning the diameter of the guide pipe gradually decreases from the air inlet end to the exhaust pipe. A fixing frame is provided at the end of the outer pipe away from the connecting plate, and an exhaust fan is connected to the fixing frame. The combination of the spiral exhaust pipe and the gradually narrowing guide pipe helps to evenly distribute the airflow and enhance centrifugal force, thereby improving the efficiency of subsequent waste gas treatment.

Description

Technical Field

[0001] This utility model relates to the field of waste gas emission technology, specifically to a cement production waste gas emission pipeline with a guide plate design. Background Technology

[0002] The cement production process, especially the clinker calcination stage, generates a large amount of high-temperature, high-humidity waste gas rich in dust and acidic gases. This waste gas is not only high in temperature, typically exceeding 300℃ to 500℃, but also contains significant amounts of fly ash and harmful substances such as SO2 and NOx. The effective and safe discharge of this waste gas into the atmosphere is one of the key aspects of a cement production line.

[0003] Exhaust gas emission pipes are the core channels connecting cement kilns with subsequent treatment equipment or chimneys. Traditional exhaust gas emission pipes are mainly simple tubular structures that meet basic transportation functions. However, the airflow may be unevenly distributed within the pipe, resulting in eddies and backflow, which leads to low exhaust gas treatment efficiency and large energy loss. Utility Model Content

[0004] (I) Technical problems to be solved

[0005] The technical problem to be solved by this utility model is to overcome the defects of uneven airflow distribution in traditional pipelines, which leads to low waste gas treatment efficiency, and to provide a cement production waste gas emission pipeline with a guide plate design.

[0006] (II) Technical Solution

[0007] To solve the above-mentioned technical problems, the technical solution provided by this utility model is as follows: a cement production waste gas emission pipe with a guide plate design, including an outer pipe and an inner pipe. A connecting plate is provided on one side of the inner wall of the outer pipe, and the inner pipe is connected to the connecting plate. The inner pipe is composed of a spiral structure exhaust pipe and a guide pipe. The guide pipe is connected to one end of the exhaust pipe, and one end of the guide pipe is trumpet-shaped, that is, the diameter of the guide pipe gradually decreases from the air inlet end to the exhaust pipe. A fixing frame is provided at the end of the outer pipe away from the connecting plate, and an exhaust fan is connected to the fixing frame.

[0008] As an improvement: a ring plate is provided inside the outer pipe near the exhaust fan end, the inner diameter of the ring plate is adapted to the outer diameter of the exhaust pipe, and a rubber pad is glued to the inner wall of the ring plate.

[0009] As an improvement: the air inlet and outlet of the exhaust pipe are both straight pipe structures and are coaxial with the outer pipe, the middle section of the exhaust pipe is a spiral pipe structure, and the inner wall of the exhaust pipe is made of ceramic material.

[0010] As an improvement, the outer wall of the outer tube is covered with thermal insulation cotton, which is made of rock wool.

[0011] As an improvement: one end of the outer tube is connected to a flange, and the connecting plate has multiple connecting holes with standard threads on the inner wall of the connecting holes. One end of the guide tube is connected to a flange, and the flange is fixedly connected to the outer tube by bolts inserted into the connecting holes.

[0012] (III) Beneficial Effects

[0013] The advantages of this utility model compared with the prior art are as follows:

[0014] 1. The spiral structure of the exhaust pipe can force the exhaust gas to form a rotating flow inside the pipe, which helps to eliminate the velocity unevenness on the pipe cross section, reduce eddies and backflow areas, and make the airflow distribution more uniform, thereby improving the efficiency and effect of subsequent exhaust gas treatment.

[0015] 2. The guide tube has a guiding function, which can effectively concentrate and guide the airflow from multiple directions into the direction of the central axis of the inner tube, so that the airflow enters the exhaust pipe along a preset path. The design of the guide tube with a gradually decreasing diameter can increase the airflow speed in the guide tube section, which helps the exhaust gas to be transported into the exhaust pipe better. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of a cement production waste gas emission pipeline with a guide plate design according to this utility model.

[0017] Figure 2 yes Figure 1 A magnified schematic diagram of the local A structure.

[0018] Figure 3 yes Figure 1 A schematic diagram of the outer tube structure.

[0019] Figure 4 yes Figure 1 A schematic diagram of the inner tube structure.

[0020] [Explanation of Labels in the Attached Image]

[0021] 1. Outer pipe; 2. Connecting plate; 3. Exhaust pipe; 4. Guide pipe; 5. Fixing bracket; 6. Exhaust fan; 7. Ring plate; 8. Rubber pad; 9. Insulation cotton; 10. Flange 1; 11. Connecting hole; 12. Flange 2. Detailed Implementation

[0022] The present invention will now be described in further detail with reference to the accompanying drawings. Identical components are indicated by the same reference numerals.

[0023] It should be noted that the terms “front,” “back,” “left,” “right,” “up,” and “down” used in the following description refer to the directions shown in the attached diagram, while the terms “inside” and “outside” refer to the directions toward or away from the geometric center of a specific component, respectively.

[0024] To make the content of this utility model easier to understand, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings.

[0025] Combined with appendix Figure 1 , Figure 3 and Figure 4 As shown, a cement production waste gas emission pipe with a baffle plate design includes an outer pipe 1 and an inner pipe. A connecting plate 2 is provided on one side of the inner wall of the outer pipe 1, and the inner pipe is connected to the connecting plate 2. The inner pipe is composed of a spiral exhaust pipe 3 and a baffle pipe 4. One end of the outer pipe 1 is connected to a flange 10. The connecting plate 2 has multiple connecting holes 11, and the inner wall of each connecting hole 11 has a standard thread. One end of the baffle pipe 4 is connected to a flange 12, which is bolted into the connecting holes 11 and fixedly connected to the outer pipe 1. The inner pipe and outer pipe 1 are connected by bolts, facilitating cleaning and maintenance of the inner pipe.

[0026] Combined with appendix Figure 1 and Figure 4 As shown, the guide pipe 4 is connected to one end of the exhaust pipe 3. One end of the guide pipe 4 is trumpet-shaped, meaning that the diameter of the guide pipe 4 gradually decreases from the air inlet end to the exhaust pipe 3. The outer pipe 1 is provided with a fixing bracket 5 at the end away from the connecting plate 2. An exhaust fan 6 is connected to the fixing bracket 5. The exhaust fan 6 generates sufficient pressure to allow the exhaust gas to enter the exhaust pipe 3 according to a preset path. The air inlet and outlet ends of the exhaust pipe 3 are both straight pipe structures and are coaxial with the outer pipe 1. The middle section of the exhaust pipe 3 is a spiral pipe structure. The inner wall of the exhaust pipe 3 is made of ceramic material, which can be alumina ceramic, and has the characteristics of high temperature resistance and corrosion resistance.

[0027] The trumpet-shaped guide tube 4 enhances gas momentum and increases exhaust gas flow rate, allowing the exhaust gas to enter the exhaust pipe 3 more smoothly. The exhaust gas flows through the spiral structure of the exhaust pipe 3, causing the exhaust gas to rotate and flow inside the pipe. This changes the impact angle and distribution of the gas, helps to distribute the gas evenly, reduces eddy backflow, and improves the efficiency and effect of subsequent exhaust gas treatment.

[0028] Combined with appendix Figure 1 and Figure 2 As shown, an annular plate 7 is provided inside the outer pipe 1 near the exhaust fan 6. The inner diameter of the annular plate 7 is adapted to the outer diameter of the exhaust pipe 3. A rubber pad 8 is glued to the inner wall of the annular plate 7. One end of the exhaust pipe 3 is inserted into the annular plate 7. The annular plate 7 provides support to ensure stability during use. At the same time, the rubber pad 8 can absorb some of the energy generated by vibration and reduce the vibration of the exhaust pipe 3.

[0029] Combined with appendix Figure 1As shown, the outer wall of the outer pipe 1 is covered with thermal insulation cotton 9, which is made of rock wool. This design can reduce heat loss, maintain the temperature of the outer pipe 1 and its inner pipe, and prevent condensation from corroding the pipe. Moreover, rock wool is a porous material that can absorb the noise generated when exhaust gas flows, thus reducing noise pollution.

[0030] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the inventive spirit of the present invention, such designs should fall within the protection scope of the present invention.

Claims

1. A cement production off-gas exhaust duct with a deflector design, characterized by: It includes an outer tube (1) and an inner tube. A connecting plate (2) is provided on one side of the inner wall of the outer tube (1), and the inner tube is connected to the connecting plate (2). The inner tube is composed of a spiral structure exhaust pipe (3) and a guide pipe (4). The guide pipe (4) is connected to one end of the exhaust pipe (3). One end of the guide pipe (4) is trumpet-shaped, that is, the diameter of the guide pipe (4) gradually decreases from the air inlet end to the exhaust pipe (3). The outer tube (1) is provided with a fixing frame (5) at the end away from the connecting plate (2). An exhaust fan (6) is connected to the fixing frame (5).

2. A cement production exhaust gas discharge duct with a deflector design according to claim 1, characterized in that: The outer tube (1) has a ring plate (7) near the exhaust fan (6) at one end. The inner diameter of the ring plate (7) is matched with the outer diameter of the exhaust pipe (3). A rubber pad (8) is glued to the inner wall of the ring plate (7).

3. A cement production exhaust gas discharge duct with a deflector design according to claim 1, characterized in that: The exhaust pipe (3) has a straight pipe structure at both the inlet and outlet ends, and is coaxial with the outer pipe (1). The middle section of the exhaust pipe (3) has a spiral pipe structure, and the inner wall of the exhaust pipe (3) is made of ceramic material.

4. A cement production exhaust gas discharge duct with deflector design according to claim 1, characterized in that: The outer wall of the outer tube (1) is covered with thermal insulation cotton (9), which is made of rock wool.

5. A cement production exhaust gas discharge duct with deflector design according to claim 1 characterized in that: One end of the outer tube (1) is connected to a flange (10), and the connecting plate (2) has multiple connecting holes (11). The inner wall of the connecting hole (11) is provided with a standard thread. One end of the guide tube (4) is connected to a flange (12). The flange (12) is inserted into the connecting hole (11) by bolts and fixedly connected to the outer tube (1).

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