Preheater c1 stage adjustable inner cylinder

Abstract

The utility model discloses a preheater C1 adjustable inner cylinder, include: stainless steel ring, the bottom of inner cylinder body is encased, at least two lead screws, vertical setting are on the outer wall of inner cylinder body, wherein, the top of lead screw is set on the inner wall of air pipe, and the bottom position adjustable mounting is on the stainless steel ring, makes the up and down position of inner cylinder body in the air pipe adjustable. The utility model has realized the optimization to the cyclone separation efficiency, through adjusting the structure parameter and the insertion depth of inner cylinder body, to solve the problem of the low separation efficiency caused by the high outlet wind speed of cyclone, the low inlet wind speed and the unsuitable inner cylinder structure.

Description

Technical Field

[0001] This utility model relates to the field of cement production equipment technology, and in particular to a C1-level adjustable inner cylinder for a preheater. Background Technology

[0002] To reduce dust emissions, a settling chamber was installed on the C1-level outlet duct. However, during operation, the ash discharge from the exhaust system increased slightly, while the material consumption ratio (1.7) remained unchanged, but the preheater frame exhibited significant swaying. Analysis revealed that the settling chamber was obstructing airflow, which was the key factor causing the preheater frame swaying. Therefore, the C1-level settling chamber was removed. After the modification, the preheater's swaying returned to normal; however, new problems arose. The dust concentration inside the C1-level cyclone separator increased to 266 mg / m³. 3 As a result, the material consumption ratio rose to 1.9, the outlet temperature of the C1 stage preheater increased by about 30 degrees, the ash discharge of the exhaust gas system increased significantly, and the rotor blades of the high-temperature fan suffered severe wear. This series of problems had a very serious impact on the normal and stable production of the kiln system.

[0003] To address the aforementioned technical issues, the inlet area of ​​the C1 stage preheater was increased to reduce the inlet velocity. Simultaneously, the inner cylinder structure was lengthened while the inner diameter was reduced, resulting in an increased outlet velocity. However, these modifications weakened the swirling effect within the cyclone separator's volute, affecting separation efficiency. Furthermore, the secondary suction of material after gas-solid separation further reduced separation efficiency, leading to an increased material consumption ratio and a larger ash discharge from the exhaust gas system.

[0004] After relevant balancing calculations, it was found that the cyclone separator's outlet velocity was too high and the inlet velocity was too low. Combined with an unsuitable inner cylinder structure, these factors reduced the cyclone separator's separation efficiency. Currently, the raw material composition and kiln system calcination conditions vary considerably. Based on the working principle of the suspension preheater, under relatively fixed airflow and velocity conditions, the inner cylinder insertion depth affects the gas-solid separation efficiency. Theoretically, the deeper the inner cylinder is inserted, the better the gas-solid separation efficiency. However, excessively deep insertion leads to a significant increase in ventilation resistance, which in turn increases energy consumption. Therefore, an adjustable inner cylinder is being designed. Utility Model Content

[0005] To address the aforementioned technical problems, this utility model provides an adjustable inner cylinder for a C1-level preheater.

[0006] To achieve the above objectives, the technical solution of this utility model is as follows: A C1-level adjustable inner cylinder for a preheater, comprising: A stainless steel ring is fitted onto the bottom of the inner cylinder body; At least two lead screws are vertically installed on the outer wall of the inner cylinder body; The top of the lead screw is set on the inner wall of the air duct, and the bottom position is adjustable on the stainless steel ring, so that the vertical position of the inner cylinder body in the air duct can be adjusted.

[0007] This utility model also includes a refractory material layer, which is disposed on the inner wall of the air inlet of the air duct.

[0008] The thickness of the refractory material layer is 200 mm.

[0009] The air inlet diameter of the duct is 1400mm.

[0010] The beneficial effects of this utility model are as follows: This utility model designs a stainless steel ring, which is fixedly fitted onto the inner cylinder body using an adjustable screw, with its bottom edge aligned with the bottom edge of the inner cylinder body. After startup, based on the calculated material consumption ratio, observation of the ash discharge volume of the exhaust gas system and the wear of the high-temperature fan impeller, and combined with the changes in the negative pressure at the C1 stage cylinder outlet, the insertion depth of the inner cylinder body is adjusted to achieve better separation efficiency. This utility model optimizes the separation efficiency of the cyclone separator by adjusting the structural parameters and insertion depth of the inner cylinder body, thereby solving the problems of low separation efficiency caused by excessively high outlet velocity, excessively low inlet velocity, and unsuitable inner cylinder structure. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 for Figure 1 Enlarged view of point A in the image. Detailed Implementation

[0012] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0013] like Figure 1 and Figure 2 As shown, a C1-level adjustable inner cylinder for a preheater includes: a stainless steel ring 5 fitted onto the bottom of the inner cylinder body 4; at least two lead screws 3 vertically mounted on the outer wall of the inner cylinder body 4; wherein the top of the lead screws 3 is mounted on the inner wall of the air duct 1, and the bottom is adjustablely mounted on the stainless steel ring 5, allowing the vertical position of the inner cylinder body 4 within the air duct 1 to be adjusted. This invention also includes a refractory material layer 2 disposed on the inner wall of the air inlet of the air duct 1. The thickness of the refractory material layer 2 is 200 mm. The diameter of the air inlet of the air duct 1 is 1400 mm.

[0014] In use, a refractory material layer 2 is provided inside the air inlet, reducing the diameter of the air inlet of the air duct 1 from 1600mm to 1400mm while keeping the height of the air inlet unchanged. This reduces the ventilation cross-sectional area of ​​the air inlet to 3.22㎡, thereby increasing the air velocity V1 at the air inlet to 20.5m / s.

[0015] Fabricate a stainless steel ring 5 with a diameter of 2400*700mm. Prepare three lead screws 3 and use them to evenly fix the stainless steel ring 5 onto the inner cylinder body 4, ensuring that its bottom edge is aligned with the bottom edge of the inner cylinder body 4. After the equipment is started up and running, closely calculate the material consumption ratio, carefully observe the ash discharge of the exhaust system and the wear of the high-temperature fan impeller, and simultaneously monitor the changes in negative pressure at the outlet of the C1 stage cylinder. Based on these data, precisely adjust the insertion depth of the inner cylinder to achieve the best separation efficiency.

[0016] Significant environmental benefits: The dust concentration in the C1 grade exhaust gas has been reduced sharply from 266 mg / m³ before the technical upgrade to 190 mg / m³, a decrease of up to 76 mg / m³, which effectively reduces dust emissions, lowers environmental pollution, and alleviates the environmental pressure on enterprises.

[0017] It should be understood that the specific embodiments described above are merely illustrative or explanatory of the principles of this utility model and do not constitute a limitation thereof. Therefore, any modifications, equivalent substitutions, improvements, etc., made without departing from the spirit and scope of this utility model should be included within its protection scope. Furthermore, the appended claims are intended to cover all variations and modifications falling within the scope and boundaries of the appended claims, or equivalent forms of such scope and boundaries.

Claims

1. A C1-level adjustable inner cylinder for a preheater, characterized in that, include: A stainless steel ring (5) is fitted onto the bottom of the inner cylinder body (4); At least two lead screws (3) are vertically installed on the outer wall of the inner cylinder body (4); The top of the screw (3) is set on the inner wall of the air duct (1), and the bottom position is adjustable on the stainless steel ring (5), so that the upper and lower positions of the inner cylinder body (4) in the air duct (1) can be adjusted.

2. The adjustable inner cylinder of a preheater C1 stage according to claim 1, characterized in that, It also includes a refractory material layer (2), which is installed on the inner wall of the air inlet of the air duct (1).

3. The adjustable inner cylinder of a preheater C1 stage according to claim 2, characterized in that, The thickness of the refractory material layer (2) is 200 mm.

4. The adjustable inner cylinder of a preheater C1 stage according to claim 3, characterized in that, The air inlet diameter of the air duct (1) is 1400mm.

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