A wide load dust removal and demisting device

Abstract

The present invention relates to a wide-load dust removal and demisting device, and belongs to the field of flue gas filtration technology. The wide-load dust removal and demisting device comprises: a cylindrical outer shell, a cyclone impeller is provided at the lower end of the outer shell, a guide rod is vertically fixed at the center of the outer shell, a diversion inner cylinder with an opening at the upper part is provided in the outer shell, the lower end of the diversion inner cylinder passes through the cyclone impeller and is fixed to the outer shell, an air float cylinder body is provided on the upper cover of the diversion inner cylinder, and the air float cylinder body is sleeved on the guide rod. Beneficial effect: By utilizing the difference in smoke supporting force under different flow rates, the air float cylinder body is driven to automatically adapt to the smoke volume, and the flow rate of the smoke passing through the cyclone impeller under various loads is maintained, thereby ensuring the overall stable dust removal and demisting efficiency of the equipment.

Description

Technical Field

[0001] The invention belongs to the technical field of flue gas filtration, and in particular relates to a wide-load dust and mist removal device. Background Art

[0002] Thermal power units have long been the mainstay of my country's electric energy and have been widely used in energy allocation and application. Under the current new situation of energy reform, in order to cooperate with my country's energy structure adjustment, thermal power units, with their unique advantages of stable control and rapid response, need to undertake comprehensive energy allocation tasks, namely deep peak regulation.

[0003] Deep peak load regulation not only requires coal-fired units to make technical adjustments in boiler combustion stability, steam turbines, and auxiliary equipment, but also brings impacts and challenges to the operation of environmental protection equipment. In the deep purification technology process of wet flue gas desulfurization particulate matter, the deep peak load regulation process brings about a large change in flue gas volume, which conflicts with the relatively narrow operating flow rate requirements of flue gas dust removal and demisting equipment after wet flue gas desulfurization. Summary of the invention

[0004] In order to solve the above technical problems, the present invention provides a wide-load dust removal and demisting device, which utilizes the difference in smoke supporting force under different flow rates to drive the air flotation cylinder to automatically adapt to the smoke volume, maintain the flow rate of the smoke through the cyclone impeller under various loads, and ensure the overall stable dust removal and demisting efficiency of the equipment.

[0005] The technical solution of the present invention to solve the above-mentioned technical problems is as follows: a wide-load dust and mist removal device comprises: a cylindrical outer shell, a cyclone impeller is provided at the lower end of the outer shell, a guide rod is vertically fixed at the center of the outer shell, a diversion inner cylinder with an opening at the upper part is provided in the outer shell, the lower end of the diversion inner cylinder passes through the cyclone impeller and is fixed to the outer shell, an air float body is provided on the upper cover of the diversion inner cylinder, and the air float body is sleeved on the guide rod.

[0006] Beneficial effect: By utilizing the difference in flue gas supporting force under different flow rates, the air float cylinder is driven to automatically adapt to the flue gas volume, maintaining the flow rate of flue gas through the cyclone impeller under various loads, ensuring the overall stable dust removal and demisting efficiency of the equipment.

[0007] Based on the above technical solution, the present invention can also be improved as follows.

[0008] Furthermore, a limiting component for preventing the air floating cylinder body from detaching is provided between the air floating cylinder body and the flow diversion inner cylinder.

[0009] The beneficial effect of adopting the above further solution is: the stability of the air float cylinder is ensured, and the air float cylinder moves smoothly and returns to its original position steadily during the reciprocating motion.

[0010] Furthermore, the limiting assembly includes a limiting protrusion and a limiting block, the limiting block is fixed at the opening at the lower end of the air float cylinder body, and the limiting protrusion is fixed on the outer wall of the upper part of the diversion inner cylinder. When the air float cylinder body rises to the specified position, the limiting protrusion and the limiting block abut against each other.

[0011] The beneficial effects of adopting the above further solution are: simple structure, limiting the position of the air float cylinder body, and ensuring the stability of the movement of the air float cylinder body.

[0012] Furthermore, the limit block is an annular limit block, and a first gap exists between the limit block and the diverter inner cylinder.

[0013] The beneficial effect of adopting the above further solution is that it is convenient for smoke to enter the diversion inner cylinder for diversion and then return to the original flow field.

[0014] Furthermore, the guide rod is a hollow cleaning water pipe, and a plurality of nozzles are arranged at intervals along the length direction of the cleaning water pipe.

[0015] The beneficial effect of adopting the above further solution is that the inside of the equipment can be cleaned in all directions to ensure the long-term stable operation of the device.

[0016] Furthermore, a flushing water connector is provided at the bottom of the guide rod.

[0017] The beneficial effect of adopting the above further solution is that it is convenient to connect an external pressure pump and is easy to use.

[0018] Furthermore, a circular through hole is provided on the top of the air floating cylinder body, a sliding sleeve is fixedly provided on the through hole, and the sliding sleeve is sleeved on the guide rod.

[0019] The beneficial effect of adopting the above further solution is to ensure that the air floating cylinder body is stable during the movement.

[0020] Furthermore, a second gap is provided between the sliding sleeve and the guide rod.

[0021] The beneficial effect of adopting the above further solution is: ensuring that the smoke can smoothly enter the diversion inner cylinder, and playing a role when the smoke is large.

[0022] Furthermore, a ventilation window is provided on the side wall of the air flotation cylinder.

[0023] The beneficial effect of adopting the above further scheme is that the smoke at the top of the air flotation cylinder body can return to the original flow field from the ventilation window, and the smoke can complete swirl, acceleration, collision, condensation and interception on both sides of the cyclone impeller at a uniform speed.

[0024] Furthermore, the total area of ​​the ventilation windows is larger than the cross-sectional area of ​​the diversion inner cylinder.

[0025] The beneficial effect of adopting the above further solution is: improving the efficiency of smoke filtration. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the present invention;

[0027] Figure 2 This is a schematic diagram of the installation position of the ventilation window;

[0028] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0029] 1. Outer shell; 2. Diverter inner cylinder; 3. Air float cylinder body; 4. Cyclone impeller; 5. Guide rod; 6. Limiting protrusion; 7. Sliding sleeve; 8. Limiting block; 9. Nozzle; 10. Flushing water joint; 11. Ventilation window. DETAILED DESCRIPTION

[0030] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0031] Example

[0032] like Figure 1-2 As shown, this embodiment provides a wide-load dust removal and demisting device, including a cylindrical outer shell 1, a diverter inner cylinder 2, an air flotation cylinder body 3 and a cyclone impeller 4. The lower end of the outer shell 1 is provided with a cyclone impeller 4, and a guide rod 5 is vertically fixed at the center of the outer shell 1. The outer shell 1 is provided with a diverter inner cylinder 2 with an opening at the top, and the lower end of the diverter inner cylinder 2 passes through the cyclone impeller 4 and is fixed to the outer shell 1. The diverter inner cylinder 2 divides the cyclone impeller 4, and the upper cover of the diverter inner cylinder 2 is provided with an air flotation cylinder body 3, and the air flotation cylinder body 3 is sleeved on the guide rod 5.

[0033] In this embodiment, a limiting assembly is provided between the air float body 3 and the diverter inner cylinder 2 for preventing the air float body 3 from detaching, and the limiting assembly includes a limiting protrusion 6 and a limiting block 8, and the limiting block 8 is fixed at the opening at the lower end of the air float body 3, and the limiting protrusion 6 is fixed on the outer wall of the upper part of the diverter inner cylinder 2, and the limiting protrusion 6 is ring-shaped. When the air float body 3 rises to the specified position, the limiting protrusion 6 and the limiting block 8 abut against each other, and the limiting block 8 is an annular limiting block, and there is a first gap of 10 mm between the limiting block 8 and the diverter inner cylinder 2.

[0034] In this embodiment, the guide rod 5 is a hollow cleaning water pipe, and a plurality of nozzles 9 are arranged at intervals along the length direction of the cleaning water pipe. The directions of the nozzles 9 are staggered to facilitate all-round cleaning of the interior of the equipment. A flushing water connector 10 is provided at the bottom of the guide rod 5 to facilitate an external water pump.

[0035] In this embodiment, a circular through hole is provided on the top of the air floating cylinder body 3 , a sliding sleeve 7 is fixed on the through hole, the sliding sleeve 7 is sleeved on the guide rod 5 , and a second gap of 5 mm is provided between the sliding sleeve 7 and the guide rod 5 .

[0036] In this embodiment, ventilation windows 11 are provided on the side walls of the air floating cylinder body 3 , and the total area of ​​the ventilation windows 11 is larger than the cross-sectional area of ​​the diverter inner cylinder 2 .

[0037] When this device is used, it is installed above the spray layer of the wet desulfurization absorption tower of the thermal power peak-shaving unit as a deep purification device for flue gas particles and droplets. The diameter of the wide-load dust removal and demisting device is about 500mm, and it is installed side by side on the cross section of the desulfurization absorption tower to form a wide-load dust removal and demisting device layer. The bottom of the device layer is 2000mm away from the spray layer at the top of the absorption tower. The flue gas purified by desulfurization carries unpurified particles and slurry spray droplets and passes through the wide-load dust removal and demisting device layer from below. When the flue gas reaches the wide-load dust removal and demisting device, its flow field is divided into two modes according to the different flue gas flow rates.

[0038] At low load and low flue gas flow rate. The specially designed air flotation cylinder 3 will not float under the pressure of its own weight when the flue gas flow rate is lower than 3m / s. When the flue gas passes through the cyclone impeller 4, it is blocked by the diversion inner cylinder 2 and the air flotation cylinder 3 and cannot flow into the diversion inner cylinder 2. All the flue gas is diverted to the space between the diversion inner cylinder 2 and the outer shell 1. The cross-sectional area of ​​this space is half of the cross-sectional area of ​​the outer shell 1. Therefore, when the flue gas passes through the cyclone impeller 4, its vertical speed increases to 6m / s. At this speed, the particles and droplets mixed in the flue gas can be effectively accelerated, collided, condensed, and intercepted.

[0039] High load and high flue gas flow rate. The flue gas dynamic pressure is greater, which can support the deadweight of the air float cylinder 3, and the air float cylinder rises accordingly. When it rises to a certain height, the limit block 8 is blocked by the limit protrusion 6 to prevent the air float cylinder 3 from being dislocated. At this time, the flue gas can pass through both inside and outside of the cyclone impeller 4 blocked by the diverter inner cylinder 2. The inner flue gas returns to the original flow field through the ventilation window 12 at the top of the air float cylinder 3, and the flue gas can complete swirl, acceleration, collision, condensation, and interception on both sides of the cyclone impeller at a uniform speed. In addition, the sleeve 7 can slide up and down along the guide rod 5 to position, and cooperate with the limit block 8 on the outer wall of the diverter inner cylinder 2 to ensure the smoothness of the up and down sliding of the entire air float cylinder 3 and the stability of the position.

[0040] In the description of the present invention, it is necessary to understand that the terms "center", "length", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "inside", "outside", "peripheral", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0041] In the description of the present invention, “plurality” means at least two, for example, two, three, etc., unless otherwise clearly and specifically defined.

[0042] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0043] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0044] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A wide-load dust and mist removal device, characterized in that: It comprises a cylindrical outer shell (1), a cyclone impeller (4) is provided at the lower end of the outer shell (1), a guide rod (5) is vertically fixed at the center of the outer shell (1), a flow splitting inner cylinder (2) with an opening at the top is provided in the outer shell (1), the lower end of the flow splitting inner cylinder (2) passes through the cyclone impeller (4) and is fixed to the outer shell (1), an air float cylinder body (3) is provided on the upper cover of the flow splitting inner cylinder (2), and the air float cylinder body (3) is sleeved on the guide rod (5); A limiting component for preventing the air float cylinder body (3) from detaching is provided between the air float cylinder body (3) and the diverter inner cylinder (2); a ventilation window (11) is provided on the side wall of the air float cylinder body (3); A circular through hole is provided on the top of the air flotation cylinder body (3), a sliding sleeve (7) is fixedly provided on the through hole, and the sliding sleeve (7) is sleeved on the guide rod (5); the guide rod (5) is a hollow cleaning water pipe, and a plurality of nozzles (9) are arranged at intervals along the length direction of the cleaning water pipe.

2. The wide-load dust and mist removal device according to claim 1, characterized in that: The limiting assembly comprises a limiting protrusion (6) and a limiting block (8); the limiting block (8) is fixed at the opening at the lower end of the air float cylinder (3); the limiting protrusion (6) is fixed on the outer wall of the upper part of the diversion inner cylinder (2); when the air float cylinder (3) rises to a specified position, the limiting protrusion (6) and the limiting block (8) abut against each other.

3. The wide-load dust and mist removal device according to claim 2, characterized in that: The limit block (8) is an annular limit block, and a first gap exists between the limit block (8) and the flow-dividing inner cylinder (2).

4. The wide-load dust and mist removal device according to claim 3, characterized in that: A flushing water connector (10) is provided at the bottom of the guide rod (5).

5. The wide-load dust and mist removal device according to claim 1, characterized in that: A second gap is provided between the sliding sleeve (7) and the guide rod (5).

6. The wide-load dust and mist removal device according to claim 1, characterized in that: The total area of ​​the ventilation windows (11) is greater than the cross-sectional area of ​​the flow-dividing inner cylinder (2).

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