A cyclone dust collector

Abstract

The utility model provides a cyclone dust collector relates to cyclone dust removal technical field, including cylinder and the cone segment connected in the bottom of cylinder, the top of cylinder is equipped with the exhaust pipe, the upper portion of cylinder lateral wall is equipped with the smoke inlet pipe, the smoke inlet pipe is tangent to the cylinder, is equipped with the cooling cavity on the cylinder, the lower part of cooling cavity is connected with the water inlet pipe, the upper part of cooling cavity is connected with the water outlet pipe, the lower end of exhaust pipe extends to the cylinder, the upper end side of exhaust pipe is connected with the branch pipe, the one end of branch pipe is away from exhaust pipe and is connected with the smoke inlet pipe, is equipped with check valve on the branch pipe, the direction of check valve's conduction is from exhaust pipe to the smoke inlet pipe, the utility model discloses through the water inlet pipe to the cooling cavity input cooling medium, can reduce the heat action of high temperature flue gas to the cylinder, slows down the corrosion reaction, prolongs the life of equipment and reduces the operation and maintenance cost, and the low temperature flue gas backflow structure that branch pipe and check valve constitute can utilize the pre-cooling of the high temperature flue gas of the smoke inlet pipe in the cylinder already reduced temperature purification flue gas, reduces the initial temperature of the flue gas of entering the cylinder, and the load of cooling cavity is reduced.

Description

Technical Field

[0001] This application relates to the field of cyclone dust removal technology, and more specifically, to a cyclone dust collector. Background Technology

[0002] In the field of industrial flue gas purification, cyclone dust collectors are widely used in dust separation operations due to their advantages such as simple structure, low cost, and convenient maintenance. Their working principle is to utilize the centrifugal force generated by the rotation of the airflow to separate dust particles in the flue gas from the airflow, thereby achieving dust collection.

[0003] However, existing cyclone dust collectors are mainly designed for ambient or medium-temperature flue gas (temperature ≤300℃), lacking effective cooling capabilities for high-temperature flue gas (temperature >300℃, such as cement rotary kiln exhaust gas). When handling high-temperature flue gas, the large amount of heat carried by the flue gas continuously acts on the cylinder wall of the cyclone dust collector, accelerating the chemical reaction between corrosive media in the flue gas and the metal substrate of the equipment, shortening the service life of the cyclone dust collector, and increasing equipment maintenance and replacement costs. Summary of the Invention

[0004] The purpose of this application is to provide a cyclone dust collector that can solve the technical problems mentioned in the background art.

[0005] This application provides a cyclone dust collector, including a cylindrical body and a conical section connected to the bottom of the cylindrical body. The top of the cylindrical body is provided with an exhaust pipe, and the upper part of the side wall of the cylindrical body is provided with a smoke inlet pipe tangential to the cylindrical body. The cylindrical body is provided with a cooling chamber, the lower part of which is connected to a water inlet pipe, and the upper part of which is connected to a water outlet pipe. The lower end of the exhaust pipe extends into the cylindrical body, and the upper end of the exhaust pipe is connected to a branch pipe. The end of the branch pipe away from the exhaust pipe is connected to the smoke inlet pipe. The branch pipe is provided with a one-way valve, and the conduction direction of the one-way valve is from the exhaust pipe to the smoke inlet pipe.

[0006] Furthermore, the cooling chamber is an annular cavity structure surrounding the outer peripheral wall of the cylinder, and a spiral baffle is fixedly provided circumferentially inside the cooling chamber, which divides the cooling chamber into spiral flow channels.

[0007] Furthermore, the inner wall of the cooling cavity is coated with a thermally conductive coating, the thickness of which is 1mm to 3mm.

[0008] Furthermore, a dividing plate is welded inside the exhaust pipe, which divides the internal space of the exhaust pipe from left to right into an exhaust duct and a recirculation duct, and the branch pipe is connected to the recirculation duct.

[0009] Furthermore, the end of the exhaust pipe extending into the cylinder is provided with a flared structure, the diameter of which gradually increases from the end closer to the exhaust pipe to the end farther away from the exhaust pipe, and the flaring angle is 30° to 60°.

[0010] Furthermore, an air pump is installed on the branch pipe.

[0011] Furthermore, the outlet end of the smoke inlet pipe is provided with a tapered flared opening.

[0012] The beneficial effects of this utility model are:

[0013] This invention introduces cooling medium into the cooling chamber through the water inlet pipe, which can effectively reduce the thermal effect of high-temperature flue gas on the cylinder, slow down the reaction between corrosive media and metal substrate, extend the service life of the equipment, and reduce the cost of equipment maintenance and replacement. The low-temperature flue gas recirculation structure composed of branch pipes and one-way valves can use the purified flue gas that has been cooled in the cylinder to pre-cool the high-temperature flue gas in the flue gas inlet pipe, which can reduce the initial temperature of the flue gas entering the cylinder and reduce the cooling load on the cooling chamber. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 These are schematic diagrams of structures in some embodiments of this application;

[0016] Figure 2 These are cross-sectional views of some embodiments of this application;

[0017] Figure 3 This is a cross-sectional view of the smoke inlet pipe in some embodiments of this application;

[0018] The reference numerals in the attached figures are as follows:

[0019] 1. Cylinder body; 2. Conical section; 3. Exhaust pipe; 31. Flue; 32. Circulating flue; 4. Inlet pipe; 5. Cooling chamber; 6. Water inlet pipe; 7. Water outlet pipe; 8. Branch pipe; 9. Check valve; 10. Spiral baffle; 11. Thermally conductive coating; 12. Divider plate; 13. Flared structure; 14. Air pump; 15. Gradual converging flared mouth. Detailed Implementation

[0020] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0021] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0022] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0023] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0025] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Specific implementation examples:

[0027] like Figure 1and Figure 2 As shown, this application provides a cyclone dust collector, including a cylindrical body 1 and a conical section 2 connected to the bottom of the cylindrical body 1. Specifically, the conical section 2 is welded to the bottom of the cylindrical body 1 and communicates with the cylindrical body 1. An exhaust pipe 3 is provided at the top of the cylindrical body 1, and a smoke inlet pipe 4 is provided on the upper part of the side wall of the cylindrical body 1. The smoke inlet pipe 4 is tangent to the cylindrical body 1. A cooling chamber 5 is provided on the cylindrical body 1. A water inlet pipe 6 is connected to the lower part of the cooling chamber 5, and a water outlet pipe 7 is connected to the upper part of the cooling chamber 5. The lower end of the exhaust pipe 3 extends into the cylindrical body 1, and a branch pipe 8 is connected to the upper end of the exhaust pipe 3. The end of the branch pipe 8 away from the exhaust pipe 3 is connected to the smoke inlet pipe 4. A one-way valve 9 is installed on the top, with the conduction direction of the one-way valve 9 from the exhaust pipe 3 to the smoke inlet pipe 4. In use, the high-temperature dusty flue gas to be treated enters the cylinder 1 through the smoke inlet pipe 4. Under the guidance of the tangential structure, a high-speed rotating airflow is formed along the cylinder wall. Centrifugal force is used to throw the dust particles in the flue gas toward the cylinder wall. The dust particles then slide down the cylinder wall to the cone section 2 and are finally discharged through the cone section 2 to complete the separation. At the same time, the exhaust pipe 3 is connected to the flue gas treatment equipment, and the water inlet pipe 6 is connected to the cooling source. The cooling medium (cooling water) continuously enters the cooling chamber 5 through the water inlet pipe 6. During the flow in the cooling chamber 5, it absorbs the transfer from the cylinder 1. The heat (from the high-temperature flue gas inside the cylinder) is absorbed by the cooling medium, which is then discharged from the water outlet pipe 7 at the top of the cooling chamber 5, achieving continuous cooling of the cylinder 1 and the flue gas inside. The cooled and purified flue gas is then guided to the flue gas treatment equipment for further processing through the exhaust pipe 3. This portion of low-temperature flue gas flows back to the inlet pipe 4 through the branch pipe 8 on the upper side of the exhaust pipe 3 (the one-way valve 9 limits the flow direction to from the exhaust pipe 3 to the inlet pipe 4 to prevent high-temperature flue gas from flowing back into the exhaust pipe 3), where it mixes with the high-temperature dust-laden flue gas to be introduced into the cylinder 1. After pre-cooling the high-temperature flue gas, the mixed flue gas then enters the cylinder 1. After completing the subsequent dust removal, a dual cooling mechanism is formed: "active cooling of cooling chamber 5 + pre-cooling of low-temperature flue gas recirculation". Cooling medium is introduced into cooling chamber 5 through water inlet pipe 6, which can effectively reduce the thermal effect of high-temperature flue gas on cylinder 1, slow down the reaction between corrosive media and metal substrate, extend the service life of equipment, and reduce equipment maintenance and replacement costs. The low-temperature flue gas recirculation structure formed by branch pipe 8 and one-way valve 9 can use the purified flue gas that has been cooled in cylinder 1 to pre-cool the high-temperature flue gas in inlet pipe 4, which can reduce the initial temperature of flue gas entering cylinder 1 and reduce the cooling load of cooling chamber 5.

[0028] like Figure 2As shown, the cooling chamber 5 is an annular cavity structure surrounding the outer wall of the cylinder 1. A spiral baffle 10 is fixed in the circumferential direction inside the cooling chamber 5, which divides the cooling chamber 5 into a spiral flow channel. The cooling medium is introduced into the cooling chamber 5 through the water inlet pipe 6. Under the action of the spiral baffle 10, the cooling medium is restricted to flow in the spiral flow channel. It needs to flow from the lower part of the cooling chamber 5 to the upper part along the spiral path in the circumference of the cylinder 1, and finally discharged from the water outlet pipe 7. The spiral flow channel formed by the spiral baffle 10 can avoid local stagnation of the cooling medium, ensure that the cooling medium evenly covers the outer wall of the cylinder 1, fully absorb the heat transferred by the cylinder 1, and improve the heat exchange efficiency.

[0029] like Figure 2 As shown, the inner wall of the cooling chamber 5 is coated with a thermally conductive coating 11, the thickness of which is 1mm to 3mm. When the high-temperature flue gas in the cylinder 1 transfers heat to the wall of the cylinder 1, the thermally conductive coating 11 can quickly conduct the heat to the cooling medium in the cooling chamber 5, avoiding the accumulation of heat between the wall of the cylinder 1 and the cooling medium, ensuring that the heat transfer path from the cylinder 1 to the cooling medium is smooth and efficient, and enhancing the cooling effect of the cooling chamber 5 on the cylinder 1 and the internal flue gas. If the thickness of the thermally conductive coating 11 is too thin, the heat transfer may be affected due to the discontinuity of the coating, while if it is too thick, the thermal resistance may be increased. Therefore, the thickness of the thermally conductive coating 11 should be 1mm to 3mm, specifically, the thickness of the thermally conductive coating 11 is 2mm.

[0030] like Figure 2 As shown, a dividing plate 12 is welded inside the exhaust pipe 3. The dividing plate 12 divides the internal space of the exhaust pipe 3 from left to right into a flue 31 and a circulating flue 32. The branch pipe 8 is connected to the circulating flue 32. The purified flue gas in the cylinder 1 after centrifugal separation is discharged to the flue gas treatment equipment along the flue 31. The purified flue gas that has been cooled in the cylinder 1 can enter the branch pipe 8 through the circulating flue 32 and then flow back to the inlet pipe 4 to mix with the high-temperature flue gas to be treated. This pre-cools the high-temperature flue gas in the inlet pipe 4 and reduces the load on the cooling chamber 5. The two flues are integrated in the same exhaust pipe 3, eliminating the need for additional independent pipes and effectively simplifying the equipment structure.

[0031] like Figure 2 As shown, the end of the exhaust pipe 3 extending into the cylinder 1 is provided with a flared structure 13. The diameter of the flared structure 13 gradually increases from the end near the exhaust pipe 3 to the end away from the exhaust pipe 3, and the flaring angle is 30° to 60°. The gradually expanding shape of the flared structure 13 can significantly reduce the flow resistance of the purified flue gas entering the exhaust pipe 3. Compared with the straight pipe structure without flaring, it can improve the flue gas collection efficiency of the exhaust pipe 3. The flaring angle of 30° to 60° takes into account both the guiding effect and the flow field stability. It will not cause poor airflow due to the angle being too small, nor will it destroy the rotating flow field inside the cylinder and affect dust separation due to the angle being too large, thus ensuring stable dust removal efficiency. Specifically, the flaring angle of the flared structure 13 is 45°.

[0032] like Figure 1 and Figure 2 As shown, an air pump 14 is installed on the branch pipe 8. Specifically, the air pump 14 is fixedly installed on the top of the cylinder 1. The air pump 14 installed on the branch pipe 8 can actively provide airflow power. When the equipment is running, after the air pump 14 is powered on and started, it draws the cooled purified flue gas from the circulating flue 32 of the exhaust pipe 3, and then pressurizes and delivers this part of low-temperature flue gas to the inlet pipe 4. The installation of the air pump 14 ensures the smoothness of the flue gas circulation path and the controllability of the flow rate, enhances the pre-cooling effect on the high-temperature flue gas in the inlet pipe 4, and further reduces the cooling load of the cooling chamber 5.

[0033] like Figure 3 As shown, the outlet end of the flue gas inlet pipe 4 is provided with a tapered horn mouth 15, so that when the high-temperature dust-laden flue gas to be treated flows through the tapered horn mouth 15, the flow space is narrowed, which creates an acceleration effect, increases the centrifugal force of the flue gas rotation in the cylinder 1, and improves the dust removal effect.

[0034] The above are merely preferred embodiments of this application and are not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A cyclone dust collector, characterized in that: The device includes a cylindrical body and a conical section connected to the bottom of the cylindrical body. The top of the cylindrical body is provided with an exhaust pipe, and the upper part of the side wall of the cylindrical body is provided with a smoke inlet pipe. The smoke inlet pipe is tangent to the cylindrical body. The cylindrical body is provided with a cooling chamber. The lower part of the cooling chamber is connected to a water inlet pipe, and the upper part of the cooling chamber is connected to a water outlet pipe. The lower end of the exhaust pipe extends into the cylindrical body, and the upper end of the exhaust pipe is connected to a branch pipe. The end of the branch pipe away from the exhaust pipe is connected to the smoke inlet pipe. The branch pipe is provided with a one-way valve, and the one-way valve is open from the exhaust pipe to the smoke inlet pipe.

2. The cyclone dust collector according to claim 1, characterized in that: The cooling chamber is an annular cavity structure surrounding the outer peripheral wall of the cylinder. A spiral baffle is fixed in the cooling chamber along the circumferential direction, and the spiral baffle divides the cooling chamber into spiral flow channels.

3. A cyclone dust collector according to claim 2, characterized in that: The inner wall of the cooling cavity is coated with a thermally conductive coating with a thickness of 1 mm to 3 mm.

4. A cyclone dust collector according to claim 1, characterized in that: A dividing plate is welded inside the exhaust pipe, which divides the internal space of the exhaust pipe into a flue and a recirculation flue from left to right, and the branch pipe is connected to the recirculation flue.

5. A cyclone dust collector according to claim 4, characterized in that: The end of the exhaust pipe extending into the cylinder is provided with a flared structure. The diameter of the flared structure gradually increases from the end closer to the exhaust pipe to the end farther away from the exhaust pipe, and the flaring angle is 30° to 60°.

6. A cyclone dust collector according to claim 1, characterized in that: An air pump is installed on the branch pipe.

7. A cyclone dust collector according to claim 1, characterized in that: The outlet end of the smoke inlet pipe is equipped with a tapered flared mouth.

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