Low-resistance energy-saving cyclone dust removal device

Abstract

The utility model discloses a low-resistance energy-saving cyclone dust removal device, which comprises an inner cylinder (1), an air inlet (2), a cylinder body (3) communicated with the air inlet (2) and an inclined cone (4) positioned at the bottom of the cylinder body (3) and communicated with the cylinder body (3), and the inner cylinder (1) is eccentrically inserted into the cylinder body (3) from the upper part; an inner cone (5) is coaxially arranged at the bottom of the inner cylinder (1), and the bottom surface of the inner cone (5) is the same as that of the inner cylinder (1); and the side wall of the inner cylinder (1) is provided with an exhaust port (6). According to the low-resistance energy-saving cyclone dust removal device, the inner cone is additionally arranged at the bottom of the straight barrel section, so that the effective sectional area in the barrel can be gradually increased, the airflow speed in the low-resistance energy-saving cyclone dust removal device is uniformly changed, the condition of dust raising in the barrel is avoided, and the separation effect is improved.

Description

Technical Field

[0001] The utility model relates to the field of cyclone dust collectors, in particular to a low-resistance energy-saving cyclone dust collector. Background Art

[0002] Cyclone separators are widely used in industries such as chemical processing, cement processing, environmental protection, and power generation, and are key equipment for gas-solid separation. They utilize the principle of centrifugal force. Once gas enters the cyclone separator, it generates a rotating flow. Under the action of centrifugal force, heavier dust particles are thrown toward the outer wall and eventually fall into a dust collection bucket or dust collector. The rotating gas flows out of the cyclone separator's outlet at the bottom of the straight section, thus separating the solid particles from the gas.

[0003] A cyclone separator consists of an inlet, a volute, a barrel, an inner barrel section, a cone, and a discharge port. The structure of the cyclone separator largely determines its separation efficiency and pressure drop. According to current research results, the internal flow field of a cyclone separator consists of a mainstream field and a "secondary flow." The mainstream field includes an external "quasi-free vortex" and a central "quasi-forced vortex," while the "secondary flow" field includes short-circuit flow, upper annular flow, lower annular flow, and eccentric flow. Gas-solid separation is mainly carried out in the mainstream field, but the secondary flow can affect the separation efficiency of the cyclone separator by causing short-circuit flow, secondary dust entrainment, and secondary dust carryover of dust particles.

[0004] In currently used cyclone separators, the solid-gas mixture rotates upon entering the cyclone. The rotating gas then enters the inner cylinder at the bottom and is ultimately discharged. Because the effective cross-sectional area within the cylinder suddenly increases at the bottom of the inner cylinder, the gas velocity at this location suddenly decreases. This sudden change in gas velocity causes airflow turbulence at the bottom of the inner cylinder. This turbulence can cause solid particles to be raised in the cyclone, affecting the cyclone's separation performance. Utility Model Content

[0005] The purpose of the utility model is to provide a low-resistance and energy-saving cyclone dust collector. The low-resistance and energy-saving cyclone dust collector increases the effective cross-sectional area of ​​the cylinder by adding an inner cone at the bottom of the straight cylinder section, thereby making the air flow velocity in the low-resistance and energy-saving cyclone dust collector change evenly, avoiding the occurrence of dust in the cylinder and improving the separation effect.

[0006] In order to achieve the above-mentioned object, the utility model provides a low-resistance and energy-saving cyclone dust removal device, which includes an inner cylinder, an air inlet, a cylinder connected to the air inlet, and a skewed cone located at the bottom of the cylinder and connected to the cylinder, wherein the inner cylinder is eccentrically inserted into the cylinder from the upper part, and an inner cone is coaxially arranged at the bottom of the inner cylinder, and the inner cone has the same bottom surface as the inner cylinder;

[0007] The side wall of the inner cylinder is provided with an exhaust port.

[0008] Preferably, the exhaust port is arranged along the axial direction of the inner cylinder, and the exhaust port is located at a position away from the air inlet along the gas rotation direction.

[0009] Preferably, the exhaust port occupies 1 / 3-1 / 5 of the circumference of the inner cylinder arc.

[0010] Preferably, the diameter of the cylinder is D, the diameter of the inner cylinder is d1, and 0.2D≤d1≤0.6D.

[0011] Preferably, the height of the air inlet is h, the depth of the inner cylinder is h1, and then, 0.5h≤h1≤1.1h.

[0012] Preferably, the height of the inner cone is h2, then 0.1h1≤h2≤0.5h1.

[0013] Preferably, the height of the cylinder is H, 1.5h≤H≤2h.

[0014] According to the above technical solution, in the utility model, the gas mixed with solid particles enters the low-resistance and energy-saving cyclone dust removal device through the air inlet. Affected by the volute structure of the air inlet, the airflow performs a swirling motion in the cylinder. As the gas moves, the solid particles mixed in the gas are subjected to a greater centrifugal force, and the solid particles are thrown to the wall and lose kinetic energy. Then, they follow the direction of the wall airflow and enter the discharge port of the skew cone and are discharged, thereby achieving the purpose of capturing solid particles.

[0015] An inner cone is provided below the inner cylinder of the low-resistance and energy-saving cyclone dust collector. After the airflow enters the vicinity of the inner cone, the effective cross-sectional area of ​​the cylinder at this position gradually increases due to the existence of the inner cone. Therefore, the speed of the airflow at this position will gradually decrease, thereby achieving a smooth transition of the airflow speed, avoiding the turbulence of the airflow, and effectively avoiding the dusting of solid particles in the cylinder, which can significantly improve the separation effect of the low-resistance and energy-saving cyclone dust collector.

[0016] The inner cone is arranged below the inner cylinder so that the airflow stroke is increased from the previous inner cylinder insertion height to the sum of the inner cylinder insertion height and the height of the inner cone. Therefore, by setting the inner cone, the rotation stroke of the airflow can also be increased, so that the gas can rotate around in the cylinder for a longer time, thereby increasing the action time of the low-resistance and energy-saving cyclone dust collector on solid particles, thereby improving the separation efficiency of solid particles.

[0017] The dust removal efficiency of using a traditional cyclone separator can reach 85%-90%, while the dust removal efficiency of using this low-resistance energy-saving cyclone dust removal device can reach 90%-97%.

[0018] An exhaust port is provided on the side wall of the inner cylinder. When the rotating gas moves to the exhaust port, it can enter the inner cylinder and be discharged from the top of the inner cylinder.

[0019] Preferably, the area of ​​the exhaust port is set to be larger, so that the resistance of the gas entering the exhaust port will be reduced, thereby increasing the processing efficiency of the low-resistance energy-saving cyclone dust removal device for the mixed gas.

[0020] Other features and advantages of the present invention will be described in detail in the subsequent detailed description of the embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the following specific embodiments, they are used to explain the present invention but do not constitute a limitation of the present invention. In the accompanying drawings:

[0022] Figure 1 This is a front view of a low-resistance, energy-saving cyclone dust removal device;

[0023] Figure 2 It is a top view of a low-resistance, energy-saving cyclone dust removal device.

[0024] Description of Reference Numerals

[0025] 1 inner cylinder 2 air inlet

[0026] 3 cylinders and 4 crooked cones

[0027] 5 inner cone 6 exhaust port DETAILED DESCRIPTION

[0028] The following is a detailed description of the specific embodiments of the present invention in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are only used to illustrate and explain the present invention and are not intended to limit the present invention.

[0029] In the present utility model, unless otherwise stated, the directional words contained in the terms "bottom, top, eccentric, coaxial, side wall, away" etc. only represent the orientation of the term in normal use, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term.

[0030] See also Figure 1-2 A low-resistance, energy-saving cyclone dust removal device comprises an inner cylinder 1, an air inlet 2, a cylinder body 3 connected to the air inlet 2, and a skewed cone 4 located at the bottom of the cylinder body 3 and connected to the cylinder body 3. The inner cylinder 1 is eccentrically inserted into the cylinder body 3 from the top, and an inner cone 5 is coaxially arranged at the bottom of the inner cylinder 1. The inner cone 5 has the same bottom surface as the inner cylinder 1.

[0031] An exhaust port 6 is provided on the side wall of the inner tube 1 .

[0032] Through the implementation of the above technical solution, the gas mixed with solid particles enters the low-resistance and energy-saving cyclone dust removal device through the air inlet 2. Affected by the volute structure of the air inlet 2, the airflow performs a swirling motion in the cylinder 3. As the gas moves, the solid particles mixed in the gas are subjected to a greater centrifugal force and are thrown to the wall to lose kinetic energy. Then, they follow the direction of the wall airflow and enter the discharge port of the skew cone 4 for discharge, thereby achieving the purpose of capturing solid particles.

[0033] An inner cone 5 is provided below the inner cylinder 1 of the low-resistance and energy-saving cyclone dust collector. After the airflow enters the vicinity of the inner cone 5, the effective cross-sectional area of ​​the cylinder 3 at this position gradually increases due to the existence of the inner cone 5. Therefore, the speed of the airflow at this position will gradually decrease, thereby achieving a smooth transition of the airflow speed, avoiding the turbulence of the airflow, and effectively avoiding the dusting of solid particles in the cylinder, which can significantly improve the separation effect of the low-resistance and energy-saving cyclone dust collector.

[0034] The inner cone 5 is arranged below the inner cylinder 1 so that the airflow stroke is increased from the previous inner cylinder 1 insertion height to the sum of the inner cylinder 1 insertion height and the height of the inner cone 5. Therefore, by arranging the inner cone 5, the rotation stroke of the airflow can also be increased, so that the gas can rotate around in the cylinder 3 for a longer time, thereby increasing the action time of the low-resistance and energy-saving cyclone dust removal device on solid particles, thereby improving the separation efficiency of solid particles.

[0035] The dust removal efficiency of using a traditional cyclone separator can reach 85%-90%, while the dust removal efficiency of using this low-resistance energy-saving cyclone dust removal device can reach 90%-97%.

[0036] An exhaust port 6 is provided on the side wall of the inner tube 1 . When the rotating gas moves to the exhaust port 6 , it can enter the inner tube 1 and be discharged from the top of the inner tube 1 .

[0037] Preferably, the area of ​​the exhaust port 6 is set to be larger, so that the resistance of the gas entering the exhaust port 6 will be reduced, thereby increasing the processing efficiency of the low-resistance energy-saving cyclone dust removal device for the mixed gas.

[0038] In this embodiment, preferably, the exhaust port 6 is provided along the axial direction of the inner tube 1 , and the exhaust port 6 is located at a position away from the air inlet 2 along the gas rotation direction.

[0039] The exhaust port 6 is set at a position away from the air inlet 2 along the gas rotation direction, so that the mixed gas can obtain more rotation time after entering the cylinder 3, so that the solid particles in the mixed gas can have enough time to be separated, thereby improving the separation efficiency of the low-resistance energy-saving cyclone dust removal device.

[0040] In this embodiment, preferably, the exhaust port 6 occupies 1 / 3-1 / 5 of the circumference of the arc of the inner cylinder 1 .

[0041] The exhaust port 6 is a gap opened along the circumference of the inner cylinder 1. If the gap is set too large, the resistance to gas discharge will be reduced, and the mixed gas will be easily discharged from the exhaust port 6 when rotating in the cylinder 3, which will cause the low-resistance energy-saving cyclone dust collector to have insufficient processing time for the gas, which may affect the separation efficiency of solid particles; if the gap is set smaller, the resistance to gas discharge will increase, and the residence time of the gas in the cylinder 3 will increase accordingly. This method can improve the separation efficiency of low solid particles, but at the same time it will reduce the gas processing efficiency of the low-resistance energy-saving cyclone dust collector, affecting the production efficiency of the low-resistance energy-saving cyclone dust collector.

[0042] Preferably, the exhaust port 6 occupies 1 / 3-1 / 5 of the circumference of the inner cylinder 1. When the exhaust port 6 occupies 1 / 3 of the circumference of the inner cylinder 1, the exhaust port 6 has a sufficiently large width, so the resistance of the exhaust port 6 to the gas is small, and the production efficiency of the low-resistance energy-saving cyclone dust collector is high. However, at this time, the separation efficiency of solid particles is low, approximately 80%-85%. If the width of the exhaust port 6 is further increased, the separation efficiency of solid particles will be significantly reduced, and the 80% separation effect of solid particles cannot be achieved. When the exhaust port 6 occupies 1 / 5 of the circumference of the inner cylinder 1, effective separation of solid particles can be achieved, and the maximum separation efficiency can reach 97%. However, the processing efficiency of the mixed gas is significantly reduced. It is suitable for occasions with low production efficiency and high separation quality requirements.

[0043] In order to achieve an optimal combination of separation efficiency and production efficiency, the width of the gap of the exhaust port 6 can be set within the range of 1 / 3-1 / 5 of the circumference of the arc of the inner cylinder 1.

[0044] In this embodiment, preferably, the diameter of the cylinder 3 is D, the diameter of the inner cylinder 1 is d1, and 0.2D≤d1≤0.6D.

[0045] The diameter d1 of the inner cylinder will affect the speed of the mixed gas in the cylinder 3. When d1 is too large, the rotation speed of the gas in the barrel is very high, which is conducive to the effective separation of solid particles. However, when the mixed gas rotates at high speed in the cylinder 3, it will also cause a large energy loss. Therefore, under the premise of ensuring separation efficiency, energy saving requirements need to be considered. Therefore, d1 is set to no more than 0.6D. When d1 is too small, the speed of the mixed gas after entering the cylinder 3 is not obvious, which may lead to insufficient centrifugal force on the solid particles in the mixed gas, thereby affecting the separation efficiency of the low-resistance energy-saving cyclone dust collector. Therefore, d1 is set to no less than 0.2D.

[0046] In this embodiment, preferably, the height of the air inlet 2 is h, the insertion depth of the inner cylinder 1 is h1, and then, 0.5h≤h1≤1.1h.

[0047] The depth h1 of the inner cylinder 1 affects the movement stroke of the gas in the cylinder 3, and the movement stroke of the gas affects the separation effect of solid particles. When h1 is larger, it means that the gas movement stroke is longer, and correspondingly the separation efficiency of solid particles is also higher.

[0048] However, the insertion depth of the inner cylinder 1 cannot exceed 1.1 hours. The deeper the inner cylinder 1 is inserted, the closer it is to the skewed cone 4. When the swirling airflow gets too close to the skewed cone 4, it may lift the solid gas particles collected in the skewed cone 4, causing secondary dust emission and reducing the separation efficiency of the low-resistance energy-saving cyclone dust collector.

[0049] In this embodiment, preferably, the height of the inner cone 5 is h2, then, 0.1h1≤h2≤0.5h1.

[0050] The inner cone 5 can avoid air flow oscillation caused by gas discharge on the one hand, and can also appropriately extend the gas movement stroke on the other hand, thereby achieving a better separation effect on solid particles.

[0051] Generally, the height of the inner cone 5 needs to be designed with reference to the width of the exhaust port 6. When the width of the exhaust port 6 is large, the height h2 of the inner cone 5 can be set to a larger value. By setting a higher inner cone 5 to improve the separation efficiency of solid particles and reduce the content of solid particles in the mixed gas, it can compensate for the fact that when the exhaust port 6 is large, a large amount of gas is discharged carrying excessive mixed gas, thereby achieving effective control of the separation efficiency of the low-resistance energy-saving cyclone dust collector.

[0052] In this embodiment, preferably, the height of the cylinder 3 is H, 1.5h≤H≤2h

[0053] The preferred embodiments of the present invention are described in detail above in conjunction with the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the scope of protection of the present invention.

[0054] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.

[0055] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.

Claims

1. A low-resistance energy-saving cyclone dust removal device, characterized in that: The low-resistance energy-saving cyclone dust removal device comprises an inner cylinder (1), an air inlet (2), a cylinder (3) connected to the air inlet (2), and a skewed cone (4) located at the bottom of the cylinder (3) and connected to the cylinder (3); the inner cylinder (1) is eccentrically inserted into the cylinder (3) from the top, and an inner cone (5) is coaxially arranged at the bottom of the inner cylinder (1); the inner cone (5) has the same bottom surface as the inner cylinder (1); An exhaust port (6) is provided on the side wall of the inner cylinder (1).

2. The low-resistance energy-saving cyclone dust removal device according to claim 1, characterized in that: The exhaust port (6) is arranged along the axial direction of the inner cylinder (1), and the exhaust port (6) is located at a position away from the air inlet (2) along the direction of gas rotation.

3. The low-resistance energy-saving cyclone dust removal device according to claim 2, characterized in that: The exhaust port (6) occupies 1 / 3 to 1 / 5 of the arc circumference of the inner cylinder (1).

4. The low-resistance energy-saving cyclone dust removal device according to claim 1, characterized in that: The diameter of the cylinder (3) is D, the diameter of the inner cylinder (1) is d1, and 0.2D≤d1≤0.6D.

5. The low-resistance energy-saving cyclone dust removal device according to claim 1, characterized in that: The height of the air inlet (2) is h, and the insertion depth of the inner cylinder (1) is h1, then, 0.5h≤h1≤1.1h.

6. The low-resistance energy-saving cyclone dust removal device according to claim 5, characterized in that: The height of the inner cone (5) is h2, then 0.1h1≤h2≤0.5h1.

7. The low-resistance energy-saving cyclone dust removal device according to claim 5, characterized in that: The height of the cylinder (3) is H, 1.5h≤H≤2h.

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