Cyclone separation dust remover with waste heat recovery function

Abstract

The utility model relates to the technical field of cyclone separation dust removers, and discloses a cyclone separation dust remover with a waste heat recovery function, the cyclone separation dust remover comprises a shell, a cyclone is arranged on the inner side of the shell, a gas collecting hood is arranged in the cyclone, a hood plate is arranged at the upper end of the gas collecting hood, a heat exchange pipe is arranged on the hood plate, and a waste heat recovery device is arranged in the shell. A condensate water scraping assembly is arranged on the inner side of the heat exchange pipe and comprises a plurality of scraping plates attached to the surface of the heat exchange pipe, and the scraping plates can move along the Z axis. Through cooperative use of the flow guide assembly, the drainage pipe, the heat exchange pipe and the condensate water scraping assembly, efficient recovery of waste heat in smoke, heat exchange between the heat exchange pipe and hot air and smoke waste heat absorption are achieved, a driving motor drives a threaded rod to rotate, a scraping plate moves up and down to scrape condensate water on the surface of the heat exchange pipe, the heat exchange efficiency is prevented from being affected, and the heat exchange efficiency is improved. The device has the characteristics of high waste heat recovery efficiency and high waste heat utilization rate.

Description

Technical Field

[0001] The present application relates to the technical field of cyclone separation dust collectors, and in particular to a cyclone separation dust collector with a waste heat recovery function. Background Art

[0002] In the existing field of industrial dust removal and waste heat recovery, cyclone dust collectors, as a common gas-solid separation equipment, are widely used in the purification of high-temperature dust-laden gases in coal-fired boilers, cement production lines, and other places. Traditional cyclone dust collectors mainly separate dust and gas through the rotating airflow of the cyclone, but they are insufficient in terms of waste heat recovery. Some cyclone dust collectors are equipped with heat exchangers to recover the waste heat of the flue gas, but the high-temperature flue gas will produce a large amount of condensed water during the cooling process. If this condensed water is not handled properly, it is easy to mix with the collected dust, increasing the difficulty of subsequent processing. In addition, the presence of condensed water not only reduces the heat exchange efficiency, but may also cause corrosion and shorten the service life of the equipment. Utility Model Content

[0003] In order to solve the problem of condensed water accumulation on the surface of heat exchange tubes in existing cyclone separation dust collectors with waste heat recovery capability, the present application provides a cyclone separation dust collector with waste heat recovery function.

[0004] The present application provides a cyclone separation dust collector with waste heat recovery function, which adopts the following technical solution:

[0005] A cyclone dust collector with a waste heat recovery function comprises an outer shell, a cyclone is provided on the inner side of the outer shell, an air collecting hood is provided inside the cyclone, a cover plate is provided on the upper end of the air collecting hood, a heat exchange tube is provided on the cover plate, a condensate scraping assembly is provided on the inner side of the heat exchange tube, the condensate scraping assembly comprises a plurality of scrapers arranged in contact with the surface of the heat exchange tube, and the scrapers can move along the Z axis to scrape condensate on the surface of the heat exchange tube.

[0006] Preferably, a gap is provided between the cover plate and the gas collecting hood, and the diameter of the cover plate is larger than the outer diameter of the gas collecting hood.

[0007] Preferably, a drain pipe is provided on the cyclone, and the drain pipe is located below the cover plate and is used for overflow discharge of condensed water.

[0008] Preferably, a plurality of guide rods are provided on the cover plate, and the upper ends of the guide rods pass through the corresponding scrapers and are slidably connected to the scrapers.

[0009] Preferably, a plurality of the scrapers are provided with threaded rods on their inner sides for transmission, and two adjacent threaded rods are connected by a transmission component.

[0010] In summary, this application has the following beneficial technical effects:

[0011] Through the combined use of the diversion component, the drain pipe, the heat exchange pipe, and the condensate scraping component, the heat exchange pipe exchanges heat with the passing hot gas to absorb the waste heat in the flue gas. The driving motor drives the threaded rod to rotate, causing the scraper to move up and down to scrape the condensate adhering to the surface of the heat exchange pipe, preventing the condensate from affecting the heat exchange efficiency of the heat exchange pipe. Under the action of gravity, the condensate drips on the outer side of the cover plate or the gas collecting hood, and the gas collecting hood collects and discharges the condensate uniformly; compared with the prior art, it has the effects of high waste heat recovery efficiency and high waste heat utilization rate. Description of the Drawings

[0012] Figure 1 is the first perspective three-dimensional structural schematic diagram of the application embodiment;

[0013] <A Figure 2 is the second perspective three-dimensional structural schematic diagram of the application embodiment;

[0014] Figure 3 is the third perspective three-dimensional structural schematic diagram of the application embodiment.

[0015] Description of the reference numerals: 1, outer shell; 2, diversion component; 201, cyclone; 202, gas collecting hood; 203, cover plate; 3, drain pipe; 4, heat exchange pipe; 5, condensate scraping component; 501, driving motor; 502, threaded rod; 503, guide rod; 504, scraper; 6, air outlet; 7, air inlet; 8, ash discharge port. Detailed Embodiment

[0016] The following further describes the present application in detail [[ID=A0000040]] Figures 1-3 with reference to the appended drawings.

[0017] The embodiment of the present application discloses a cyclone separator with a waste heat recovery function. Refer to Figures 1-3, A cyclone separator with waste heat recovery function, including a housing 1. Inside the housing 1, a flow guiding component 2 is installed. The flow guiding component 2 includes a cyclone 201 installed inside the housing 1. Inside the cyclone 201, a heat exchange tube 4 is installed. At the top of the cyclone 201 on the housing 1, an air outlet 6 is installed. The cyclone 201 is connected to an external air purifier through the air outlet 6. An air inlet 7 is installed on the side of the housing 1. The cyclone 201 is communicated with a flue gas emission device through the air inlet 7. A dust discharge port 8 is installed at the bottom of the housing 1. The dust discharge port 8 is connected to a dust collection box through a dust discharge valve. The flue gas enters the housing 1 along the spiral flow path of the cyclone 201. The soot spirals downward inside the housing 1 towards the cone, forming an outer swirling airflow. The dust-containing gas generates centrifugal force during rotation, throwing the dust particles with a specific gravity greater than that of the gas towards the wall of the device. After the dust particles contact the wall of the device, they lose their inertial force and fall along the wall of the device by the momentum of the inlet velocity and the downward gravity, entering the dust discharge valve. When the airflow reaches a certain position at the lower end of the housing 1, it reverses from the middle of the cyclone separator upward in the same rotation direction and continues to flow in a spiral shape, forming an inner swirling airflow. The rising inner swirling airflow enters the exhaust pipe and is discharged from the lower part of the cyclone body.

[0018] Refer to Figure 3 , A gas collecting hood 202 is installed below the heat exchange tube 4 inside the cyclone 201. At the upper end of the gas collecting hood 202, several support columns are installed. The upper ends of the support columns are fixedly installed with a cover plate 203, so that there is a reserved gap between the cover plate 203 and the gas collecting hood 202. At the same time, the diameter of the cover plate 203 is larger than the outer diameter of the gas collecting hood 202. During operation, the upper end of the gas collecting hood 202 is blocked by the cover plate 203, so that the airflow is discharged from the side gap, delaying the rising rate of the flue gas. At the same time, it avoids the condensed water cleaned down from directly entering the lower end of the housing 1 through the cyclone 201 and mixing with the dust, causing the dust to be wet and affecting subsequent dust discharge.

[0019] Refer to Figure 2 , A drain pipe 3 is installed on the cyclone 201. The drain pipe 3 is located below the cover plate 203. The cover plate 203 can be communicated with an external sewage treatment device. The condensed water collected and converged on the side of the gas collecting hood 202 is discharged through the drain pipe 3, which is convenient for subsequent unified treatment. The surface of the cover plate 203 can be wrapped with heat insulation cotton to avoid heat loss when contacting the airflow.

[0020] Refer to Figure 3, a condensate scraping assembly 5 is installed on the inner side of the cover plate 203. The condensate scraping assembly 5 includes a number of scrapers 504 attached to the surface of the heat exchange tube 4. A threaded rod 502 is installed inside the scrapers 504 of several pieces. Adjacent two threaded rods 502 are connected by a transmission component. A number of guide rods 503 are installed on the cover plate 203. The upper end of the guide rod 503 passes through the corresponding scraper 504 and is slidably connected to the scraper 504. The scraper 504 is guided by the guide rod 503 to ensure the smooth up and down movement of the scraper 504. The end of one of the threaded rods 502 passes through the housing 1 and is connected to a driving motor 501. The transmission component can be a chain drive unit. By controlling the forward and reverse rotation of the driving motor 501, the threaded rod 502 is driven to rotate, so that the scraper 504 moves up and down to scrape off the condensate attached to the surface of the heat exchange tube 4, avoiding the influence of condensate on the heat exchange efficiency of the heat exchange tube 4. Under the action of gravity, the condensate drips on the outer side of the cover plate 203 or the air collecting hood 202.

[0021] Refer to Figure 3 , a layer of anti-condensation coating can be coated on the surface between the heat exchange tube 4 and the scraper 504 to reduce the adhesion of condensate. A flexible pad is pasted on the contact surface between the scraper 504 and the heat exchange tube 4 to prevent scratching the coating.

[0022] The implementation principle of a cyclone separator with waste heat recovery function in an embodiment of the present application is as follows:

[0023] The flue gas enters the inside of the cyclone separator 1 through the air inlet 7 and first passes through the cyclone 201 of the guide assembly 2. Inside the cyclone 201, the flue gas rotates at a high speed along the spiral flow path to form an outer swirling flow. During this process, due to the action of centrifugal force, the dust particles are thrown towards the inner wall of the cyclone and gradually deposit and fall along the wall surface, and finally are discharged through the ash discharge port 8 and enter the dust collection box.

[0024] When the airflow reaches a certain position at the lower end of the cyclone 201, the airflow direction reverses to form an inner swirling flow. The inner swirling flow continues to rise in a spiral shape, exchanges heat with the heat exchange tube 4, and finally is discharged through the air outlet 6 and is connected to an external air purifier for further treatment.

[0025] During the heat exchange process of the flue gas, some water vapor will condense into water and adhere to the surface of the heat exchange tube 4. By controlling the forward and reverse rotation of the driving motor 501, the threaded rod 502 is driven to rotate, and then the scraper 504 moves up and down along the surface of the heat exchange tube 4 to scrape off the condensate. The scraped condensate drips on the outer side of the air collecting hood 202 or the cover plate 203 under the action of gravity and is finally discharged through the drain pipe 3.

[0026] The following points should be noted: First, in the description of this application, it should be noted that unless otherwise specified and defined, the terms "installed", "connected", and "coupled" should be understood in a broad sense. It can be a mechanical connection or an electrical connection, or it can be the communication inside two components. It can be directly connected. The terms "upper", "lower", "left", "right", etc. are only used to represent the relative position relationship. When the absolute position of the object being described changes, the relative position relationship may change;

[0027] Second, in the attached drawings of the disclosed embodiments of the present utility model, only the structures related to the disclosed embodiments are involved. For other structures, reference can be made to the general design. Without conflict, the same embodiment and different embodiments of the present utility model can be combined with each other;

[0028] Finally, the above are only the preferred embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

[0029] The above are all the preferred embodiments of this application and do not limit the protection scope of this application accordingly. Therefore, all equivalent changes made according to the structure, shape, and principle of this application shall be covered within the protection scope of this application.

Claims

1. A cyclone separator with waste heat recovery function, comprising a housing (1), and a cyclone (201) is arranged inside the housing (1), characterized in that: An air collecting hood (202) is provided inside the cyclone (201), a cover plate (203) is provided at the upper end of the air collecting hood (202), a heat exchange tube (4) is provided on the cover plate (203), a condensed water scraping assembly (5) is provided on the inner side of the heat exchange tube (4), and the condensed water scraping assembly (5) includes a plurality of scrapers (504) provided in contact with the surface of the heat exchange tube (4), and the scrapers (504) can move along the Z axis to scrape condensed water on the surface of the heat exchange tube (4).

2. The cyclone separator with waste heat recovery function according to claim 1, characterized in that: A gap is provided between the cover plate (203) and the gas collecting cover (202), and the diameter of the cover plate (203) is larger than the outer diameter of the gas collecting cover (202).

3. The cyclone separator with waste heat recovery function according to claim 1, characterized in that: The cyclone (201) is provided with a drain pipe (3), which is located below the cover plate (203) and is used for overflow discharge of condensed water.

4. A cyclone separator with waste heat recovery function according to claim 1, characterized in that: A plurality of guide rods (503) are provided on the cover plate (203), and the upper ends of the guide rods (503) pass through corresponding scrapers (504) and are slidably connected to the scrapers (504).

5. A cyclone separator with waste heat recovery function according to claim 1, characterized in that: The inner sides of the plurality of scrapers (504) are provided with threaded rods (502) for transmission, and two adjacent threaded rods (502) are connected to each other through a transmission component.

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