Dust removal mechanism for rotary kiln

Abstract

The dust removal mechanism comprises a kiln body, an air inducing pipe, a dust collection unit and a blowing unit, one end of the air inducing pipe is communicated with the exhaust end of the kiln body, the other end of the air inducing pipe is communicated with the air inlet end of the dust collection unit, the air inducing pipe is arranged in the horizontal direction, and the blowing unit comprises an air guiding piece and a plurality of branch pipes. The branch pipes are fixedly arranged on the air inducing pipe at intervals in the length direction of the air inducing pipe, one end of each branch pipe is arranged in the air inducing pipe in a penetrating mode, one end of each branch pipe is provided with a bent part, the bent parts are attached to the inner bottom wall of the air inducing pipe, air outlets of the bent parts face the other end of the air inducing pipe, and the other ends of the branch pipes are communicated with the air guiding piece. The problems that in the prior art, materials in a pipeline are prone to accumulation, the pipeline is blocked, and the pipeline needs to be removed regularly for cleaning are solved.

Description

Technical Field

[0001] This utility model relates to the field of rotary kiln dust removal technology, specifically to a dust removal mechanism for rotary kilns. Background Technology

[0002] Rotary kilns are conventional equipment for preparing battery material precursors, used for drying materials containing moisture or calcining oxides. During operation, the rotary kiln requires the induced draft fan to create a negative pressure airflow inside the kiln, expelling water vapor or other gases generated during the drying or calcination process. The exhaust pipe is connected to a dust collector to intercept and collect any small amount of material carried by the airflow. The airflow is then discharged after passing through the dust collector. However, the pipe connecting the rotary kiln to the dust collector is often blocked by gradually deposited material. This blockage affects the induced draft flow, preventing water vapor from being discharged in time. The water vapor that cannot be discharged in time will also adhere to the dust collected, clogging the filter of the dust collector at the end, further preventing the induced draft airflow from being discharged, and directly causing the equipment to shut down.

[0003] The commonly used solution is to regularly disassemble and clean the ventilation ducts, which is time-consuming, labor-intensive, and affects the normal operation of the equipment. Moreover, as dust gradually accumulates in the collection pipes, the air intake gradually decreases, which also affects the quality fluctuations inside the rotary kiln. Later, to facilitate cleaning, an automatic cleaning and blowing pipe was installed. This pipe consists of a main stainless steel pipe and several branch pipes. The main pipe and branch pipes intersect at a 45° angle, and the distance between the branch pipes is 50cm. Because of the 45° angle, the nozzles spray air directly onto the pipe wall during blowing. During blowing, the air forms a swirling airflow. Over time, material still accumulates in the pipe, causing blockages. The pipe still needs to be disassembled and cleaned regularly. Utility Model Content

[0004] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and provide a dust removal mechanism for rotary kilns, which solves the problem that materials in the pipelines are prone to accumulate and cause blockages, requiring regular removal and cleaning of the pipelines.

[0005] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0006] The utility model provides a dust removal mechanism for rotary kiln, including kiln body, air duct and dust collecting unit, one end of air duct communicates with the exhaust end of kiln body, the other end of air duct communicates with the gas inlet end of dust collecting unit, and air duct is along horizontal direction setting, still include purging unit, purging unit includes air guide spare and a plurality of branch pipes, a plurality of branch pipes are interval fixed on air duct along the length direction of air duct, and one end of branch pipe is worn in air duct, one end of branch pipe has a bending part, the bending part is pasted with the inner bottom wall of air duct, and the gas outlet of bending part faces the other end of air duct, and the other end of a plurality of branch pipes communicates with air guide spare.

[0007] In some embodiments, the distance between two adjacent branch pipes is 50 cm.

[0008] In some embodiments, the branch pipe is L-shaped as a whole, and the length of the bending part is 10 cm.

[0009] In some embodiments, the air guide piece is a pipe, which is arranged above the air duct along the length direction of the air duct, and one end of the pipe is provided with an adjusting valve.

[0010] In some embodiments, the dust collecting unit includes a box, a cloth bag cylinder, a back blowing piece, and a high-pressure gas tank. The box has a dust collecting cavity and an exhaust cavity above the dust collecting cavity. The dust collecting cavity is in communication with the other end of the air duct. A plurality of cloth bag cylinders are arranged in the dust collecting cavity, and the dust collecting cavity is in communication with the exhaust cavity through the plurality of cloth bag cylinders. The back blowing piece is arranged in the exhaust cavity. The high-pressure gas tank is fixedly arranged outside the box, and the gas outlet of the high-pressure gas tank is in communication with the back blowing piece. The back blowing piece outputs high-pressure gas to spray each cloth bag cylinder to shake off the dust adsorbed on each cloth bag cylinder.

[0011] In some embodiments, the back blowing piece includes a gas conveying pipe and a plurality of jet heads. One end of the gas conveying pipe is in communication with the gas outlet of the high-pressure gas tank through a pulse valve. The plurality of jet heads are fixedly connected to the gas conveying pipe, and each jet head corresponds to an opening of each cloth bag cylinder.

[0012] In some embodiments, a spray dust removal unit is further included, which is in communication with the exhaust cavity. The spray dust removal unit includes a dust removal cylinder, a spraying piece, and a gas extraction piece. The dust removal cylinder has a curved channel inside. The inner bottom of the dust removal cylinder is in communication with the exhaust cavity through the gas extraction piece. The spraying piece is arranged along the height direction of the dust removal cylinder, and is used to spray liquid into the curved channel.

[0013] In some embodiments, the dust removal unit further comprises a liquid storage tank, the liquid storage tank containing liquid, the lower end of the dust removal cylinder being in communication with the liquid storage tank, and the liquid storage tank being in communication with the plurality of spray members via a liquid pumping member.

[0014] In some embodiments, a gas diffusion plate is arranged below the curved channel in the dust removal cylinder, and a plurality of air holes are formed in the gas diffusion plate.

[0015] In some embodiments, at least one filter plate layer is arranged above the curved channel in the dust removal cylinder.

[0016] Compared with the prior art, the dust removal mechanism for a rotary kiln provided by the present application has the following advantages: one end of the air duct is in communication with the exhaust end of the kiln body, the other end of the air duct is in communication with the air inlet end of the dust collection unit, the air duct is arranged along the horizontal direction, a plurality of branch pipes are fixedly arranged on the air duct along the length direction of the air duct, one end of each branch pipe is arranged in the air duct, one end of each branch pipe has a bending portion, the bending portion is in abutment with the inner bottom wall of the air duct, the air outlet of the bending portion faces the other end of the air duct, and the other end of each branch pipe is in communication with the air guide member; after the air guide member is in communication with air, the plurality of branch pipes blow air towards the other end of the air duct, so that the air flow does not form a vortex, the material deposited on the inner bottom of the air duct is blown up, and the material can enter the dust collection unit along the direction of the air flow, thereby effectively avoiding the deposition of the material on the bottom of the air duct. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic view of the dust removal mechanism for a rotary kiln provided by the present application;

[0018] Figure 2 is a schematic view of the internal structure of the dust collection unit provided by the present application;

[0019] Figure 3 is a connection schematic view of the blowing unit and the air duct provided by the present application;

[0020] Figure 4 is a schematic view of the internal structure of the dust removal cylinder provided by the present application. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the present application more clear, the present application will be further described in detail below with reference to the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application, and are not used to limit the present application.

[0022] In order to solve the technical problem that the material in the pipeline is easy to accumulate and cause the pipeline to be blocked, and the pipeline needs to be regularly removed and cleaned, the utility model provides a dust removal mechanism for a rotary kiln, which can realize that the material deposited at the bottom of the air duct is blown up, and the material is prevented from blocking the air duct.

[0023] Please refer to Figures 1-4 , Figures 1-4 For a dust removal mechanism for a rotary kiln in an embodiment of the utility model, including kiln body 1, air duct 2, dust collecting unit 3 and purging unit 4, one end of air duct 2 with the exhaust end of kiln body 1 is communicated, the other end of air duct 2 with the air inlet end of dust collecting unit 3 is communicated, and air duct 2 is arranged along the horizontal direction, purging unit 4 includes air guide piece 41 and multiple branch pipes 42, multiple branch pipes 42 are fixedly arranged on air duct 2 along the length direction of air duct 2, and one end of branch pipe is arranged in air duct 2, one end of branch pipe 42 has a bending part, the bending part is attached to the inner bottom wall of air duct 2, and the air outlet of bending part faces the other end of air duct 2, and the other end of multiple branch pipes 42 is communicated with air guide piece 41.

[0024] It should be noted that kiln body 1 is a long cylindrical furnace, which can rotate around its own axis, the material is added from one end, and is discharged from the other end after heating treatment; the design of the rotary kiln makes the material can be uniformly heated in the interior, and by adjusting the inclination angle and the rotation speed of the kiln body, the residence time and the treatment effect of the material in the kiln can be controlled.

[0025] In the specific embodiment, the distance between two adjacent branch pipes 42 is 50cm, the branch pipe 42 is L-shaped as a whole, and the length of the bending part is 10cm, after air guide piece 41 is connected to the gas source, branch pipe 42 blows air towards the other end of air duct 2, the material deposited at the bottom of air duct 2 is blown up, and the material enters dust collecting unit 3 along the direction of air flow, so that the material is prevented from depositing at the bottom of air duct 2.

[0026] It should be noted that the air guide piece 41 is a pipe, which is arranged above the air duct 2 along the length direction of the air duct 2, and one end of the pipe is provided with an adjusting valve 43; the flow rate of the air flow can be adjusted by adjusting valve 43, and the air flow pressure is kept at 0.35-0.55Mpa.

[0027] It should be noted that the dust collecting unit 3 can collect the material and filter out the dust in the air flow, and specifically, the dust collecting unit 3 comprises a box body 31, a cloth bag cylinder 32, a back blowing piece 33 and a high-pressure gas storage tank 34, the box body 31 is internally provided with a dust collecting cavity and an exhaust cavity located above the dust collecting cavity, the dust collecting cavity is communicated with the other end of the air duct 2, a plurality of cloth bag cylinders 32 are arranged in the dust collecting cavity, and the dust collecting cavity is communicated with the exhaust cavity through the plurality of cloth bag cylinders 32, the back blowing piece 33 is arranged in the exhaust cavity, the high-pressure gas storage tank 34 is fixedly arranged outside the box body 31, and the gas outlet of the high-pressure gas storage tank 34 is communicated with the back blowing piece 33, and the back blowing piece 33 outputs high-pressure gas to spray each cloth bag cylinder 32 to shake off the dust adsorbed on each cloth bag cylinder 32.

[0028] In the embodiment, the back blowing piece 33 comprises a gas conveying pipe 331 and a plurality of jet heads 332, one end of the gas conveying pipe 331 is communicated with the gas outlet of the high-pressure gas storage tank 34 through a pulse valve, the plurality of jet heads 332 are fixedly connected with the gas conveying pipe 331, and each jet head 332 corresponds to the opening of each cloth bag cylinder 32.

[0029] On the basis of the above scheme, in order to cool and remove dust from the air flow, specifically, a spray dust removal unit 5 is further included, the spray dust removal unit 5 is communicated with the exhaust cavity, the spray dust removal unit 5 comprises a dust removal cylinder 51, a spraying piece 52 and a gas extraction piece 53, the dust removal cylinder 51 is internally provided with a curved channel, the inner bottom of the dust removal cylinder 51 is communicated with the exhaust cavity through the gas extraction piece 53, the spraying piece 52 is arranged along the height direction of the dust removal cylinder 51, and the spraying piece 52 is used for spraying liquid into the curved channel.

[0030] Specifically, the liquid droplets can not only cool the air flow, but also absorb the dust in the air flow by contacting the liquid droplets with the air flow.

[0031] It should be noted that in order to recycle the liquid, specifically, the spray dust removal unit 5 further comprises a liquid storage tank 54, the liquid storage tank 54 contains liquid, the lower end of the dust removal cylinder 51 is communicated with the liquid storage tank 54, and the liquid storage tank 54 is communicated with the plurality of spraying pieces 52 through a liquid extraction piece 55.

[0032] On the basis of the above scheme, in order to ensure that the air flow can be uniformly dispersed into the curved channel, a gas dispersion plate 56 is arranged below the curved channel in the dust removal cylinder 51, and a plurality of air holes are formed in the gas dispersion plate 56.

[0033] In addition, at least one filter plate layer 57 is arranged above the curved passage in the dust removal cylinder 51, and the airflow can be further dedusted through the filter plate layer 57.

[0034] The specific implementation of the utility model above does not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the utility model claim.

Claims

1. A dust removal mechanism for a rotary kiln, comprising a kiln body, an air duct, and a dust collection unit, one end of the air duct being in communication with an exhaust end of the kiln body, the other end of the air duct being in communication with an air inlet end of the dust collection unit, and the air duct being arranged in a horizontal direction, characterized in that, The air blowing unit comprises a guide pipe and a plurality of branch pipes, the branch pipes are fixedly arranged on the guide pipe along the length direction of the guide pipe, one end of the branch pipes is arranged in the guide pipe, one end of the branch pipes is provided with a bending part, the bending part is in contact with the inner bottom wall of the guide pipe, and the air outlet of the bending part is directed to the other end of the guide pipe, and the other end of the branch pipes is communicated with the guide pipe.

2. A dust removing mechanism for a rotary kiln according to claim 1, wherein The distance between two adjacent branch pipes is 50 cm.

3. The dust removing mechanism for a rotary kiln according to claim 1, characterized in that, The branch pipes are in L shape as a whole, and the length of the bending part is 10 cm.

4. The dust removing mechanism for a rotary kiln according to claim 1, characterized in that, The guide pipe is a pipe arranged above the guide pipe along the length direction of the guide pipe, and one end of the pipe is provided with an adjusting valve.

5. The dust removing mechanism for a rotary kiln according to claim 1, wherein The dust collecting unit comprises a box, a cloth bag cylinder, a back blowing part and a high-pressure gas tank, the box is provided with a dust collecting cavity and an exhaust cavity above the dust collecting cavity, the dust collecting cavity is communicated with the other end of the guide pipe, a plurality of cloth bag cylinders are arranged in the dust collecting cavity, the dust collecting cavity is communicated with the exhaust cavity through the cloth bag cylinders, the back blowing part is arranged in the exhaust cavity, the high-pressure gas tank is fixedly arranged outside the box, and the air outlet of the high-pressure gas tank is communicated with the back blowing part, and the back blowing part outputs high-pressure gas to spray each cloth bag cylinder to shake off the dust adsorbed on each cloth bag cylinder.

6. A dust removal mechanism for a rotary kiln according to claim 5, characterized in that, The back blowing part comprises a gas conveying pipe and a plurality of gas jet heads, one end of the gas conveying pipe is communicated with the air outlet of the high-pressure gas tank through a pulse valve, the gas jet heads are fixedly connected with the gas conveying pipe, and each gas jet head corresponds to the opening of each cloth bag cylinder.

7. A dust removal mechanism for a rotary kiln according to claim 5, characterized in that, The spraying dust removing unit is communicated with the exhaust cavity, and the spraying dust removing unit comprises a dust removing cylinder, a spraying part and a gas suction part, the dust removing cylinder is provided with a curved channel, the inner bottom of the dust removing cylinder is communicated with the exhaust cavity through the gas suction part, the spraying part is arranged along the height direction of the dust removing cylinder, and the spraying part is used for spraying liquid into the curved channel.

8. A dust removal mechanism for a rotary kiln according to claim 7, characterized in that, The spraying dust removing unit further comprises a liquid storage tank, the liquid storage tank contains liquid, the lower end of the dust removing cylinder is communicated with the liquid storage tank, and the liquid storage tank is communicated with the spraying parts through a liquid suction part.

9. The dust removing mechanism for a rotary kiln according to claim 7, wherein The dust removing cylinder is provided with a gas distribution plate below the curved channel, and a plurality of air holes are arranged on the gas distribution plate.

10. The dust removing mechanism for a rotary kiln according to claim 7, characterized in that, The dust removing cylinder is provided with at least one filter plate layer above the curved channel.

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