Pulverized coal dense-thin separator

Abstract

The utility model discloses a pulverized coal concentration separator, which relates to the field of pulverized coal concentration separation and comprises a concentration separation adjusting shell, a concentration adjusting component arranged in the concentration separation adjusting shell, an adjusting driving component arranged on one side of the concentration adjusting component, a primary concentration separation component arranged on one side of the adjusting driving component, and a secondary concentration separation component arranged on the other side of the primary concentration separation component. According to the utility model, the prior art is improved, and in actual use, through the concentration adjusting assembly, the problems that the concentration ratio is inconvenient to adjust, the concentration of pulverized coal is too high when the boiler load is relatively high, and the separation efficiency is low are solved. And combustion of volatile components is affected due to oxygen deficit of an ignition area, so that ignition is unstable.

Description

Technical Field

[0001] This utility model relates to the field of coal powder concentration separation, specifically, to a coal powder concentration separator. Background Technology

[0002] As China's power structure adjustment continues, the share of renewable energy sources such as hydropower and photovoltaic power is gradually increasing, while the share of thermal power generation is declining year by year. However, the absorption and peak-shaving capacity of renewable energy is not as good as that of thermal power generation. Based on the current situation, thermal power units need to improve their flexibility and enhance the peak-shaving capacity of boilers. During peak-shaving, boilers operate at low loads, resulting in lower pulverized coal concentrations and relatively lower furnace temperatures, leading to delayed pulverized coal ignition and making it difficult to ensure the stability of pulverized coal combustion within the furnace. To improve the stability of flame combustion, the combustion system needs to be modified, including improvements to pulverized coal combustion technology.

[0003] Currently, low-load stable combustion technologies mainly include increasing the pulverized coal concentration in the primary air stream, increasing the initial temperature of the pulverized coal stream, and increasing the fineness of the pulverized coal particles. Rich-lean separation, on the other hand, uses increased pulverized coal concentration in the primary air stream to reduce the ignition heat and achieve stable combustion. Existing rich-lean separators mostly use impact and centrifugal force via bends to achieve rich-lean separation, but the concentration ratio is inconvenient to adjust. At high boiler loads, this may result in excessively high pulverized coal concentration, leading to oxygen deficiency in the ignition zone and affecting the combustion of volatiles, causing unstable ignition. Utility Model Content

[0004] In view of the problems in the related technologies, this utility model proposes a coal powder concentration separator to overcome the above-mentioned technical problems existing in the existing related technologies.

[0005] Therefore, the specific technical solution adopted by this utility model is as follows:

[0006] A pulverized coal concentration separator includes a concentration separation regulating shell, a concentration adjustment component is provided inside the concentration separation regulating shell, an adjustment drive component is provided on one side of the concentration adjustment component, and a preliminary concentration separation component is provided on one side of the adjustment drive component.

[0007] To achieve the function of adjusting the concentration of pulverized coal, the concentration adjustment component includes an adjusting guide plate, with rotating shafts symmetrically connected to both sides of the adjusting guide plate. The adjusting guide plate is movably connected to the concentration separation and adjustment housing via the rotating shafts. An elastic contact block is connected to the periphery of the adjusting guide plate. A sliding lifting plate is slidably fitted to one side of the adjusting guide plate. A tension spring is connected between the sliding lifting plate and the adjusting guide plate. A sliding limit plate is connected below the sliding lifting plate. The sliding limit plate slides through the concentration separation and adjustment housing. A rotating screw is threaded inside the sliding lifting plate. The rotating screw is movably connected to the concentration separation and adjustment housing via a sealed bearing.

[0008] Furthermore, a lifting limit block is connected to one end of the sliding limit plate.

[0009] Furthermore, in order to achieve the function of adjustment drive, the adjustment drive component includes a transmission worm gear, which is respectively installed at one end of the rotating lead screw. A transmission worm is meshed on one side of the transmission worm gear, and a worm fixing frame is meshed around the transmission worm. The worm fixing frame is connected to the concentration separation adjustment housing, and a servo motor is connected to one end of the transmission worm. The housing of the servo motor is connected to the worm fixing frame.

[0010] Furthermore, a dust concentration sensor is installed inside the concentration separation and adjustment housing.

[0011] Furthermore, a controller is installed on one side of the concentration separation and adjustment housing, and the dust concentration sensor and servo motor are electrically connected to the controller.

[0012] Furthermore, in order to achieve the function of preliminary concentration-depression separation, the preliminary concentration-depression separation component includes a preliminary separation installation cylinder, which is connected to the concentration-depression separation regulating housing. A preliminary separation spiral blade is installed inside the preliminary separation installation cylinder, and a pulverized coal inlet pipe is connected to one side of the preliminary separation installation cylinder.

[0013] Furthermore, a support frame is connected to the bottom of the concentration / dilute separation adjustment housing.

[0014] The beneficial effects of this utility model are as follows:

[0015] (1) This utility model has made improvements to the existing technology. In actual use, the concentration adjustment component solves the problem that the existing concentration separators mostly use impact and centrifugal force of bends to achieve concentration separation, but the concentration ratio is inconvenient to adjust. When the boiler load is high, the coal powder concentration may be too high, which will cause oxygen deficiency in the ignition zone and affect the combustion of volatiles, resulting in unstable ignition.

[0016] (2) In actual use, the adjustment drive assembly is driven by a servo motor, with the transmission worm gear meshing with the transmission worm wheel, which is fixed to the end of the rotating screw. The worm gear fixing bracket secures the transmission worm gear to the housing, ensuring transmission stability. The servo motor receives signals through the controller to achieve automated control. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1This is a schematic diagram of the main structure of a pulverized coal concentration separator according to an embodiment of the present utility model;

[0019] Figure 2 This is a schematic diagram of the structure of a concentration adjustment component in a pulverized coal concentration separator according to an embodiment of the present utility model;

[0020] Figure 3 This is a schematic diagram of the adjustment drive assembly in a pulverized coal concentration separator according to an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the structure of a preliminary concentration-desalination component in a pulverized coal concentration-desalination separator according to an embodiment of the present invention.

[0022] In the picture:

[0023] 1. Concentration / Dilute Separation Adjustment Housing; 2. Concentration / Dilute Adjustment Assembly; 201. Adjustment Guide Plate; 202. Rotating Shaft; 203. Sliding Lifting Plate; 204. Elastic Contact Block; 205. Pull Spring; 206. Sliding Limit Plate; 207. Rotating Screw; 208. Sealed Bearing; 3. Adjustment Drive Assembly; 301. Transmission Worm Gear; 302. Transmission Worm; 303. Worm Fixing Frame; 304. Servo Motor; 4. Preliminary Concentration / Dilute Separation Assembly; 401. Preliminary Separation Mounting Cylinder; 402. Preliminary Separation Spiral Blade; 403. Pulverized Coal Inlet Pipe; 5. Dust Concentration Sensor; 6. Controller; 7. Support Frame; 8. Lifting Limit Block. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] According to an embodiment of the present invention, a coal powder concentration separator is provided, including a concentration separation adjustment housing 1, a concentration adjustment component 2 is provided inside the concentration separation adjustment housing 1, an adjustment drive component 3 is provided on one side of the concentration adjustment component 2, and a preliminary concentration separation component 4 is provided on one side of the adjustment drive component 3.

[0026] like Figure 1-4As shown, according to the coal powder concentration separator of this utility model embodiment, the concentration adjustment component 2 includes an adjustment guide plate 201. Rotating shafts 202 are symmetrically connected to both sides of the adjustment guide plate 201. The adjustment guide plate 201 is movably connected to the concentration separation adjustment housing 1 through the rotating shafts 202. An elastic contact block 204 is connected to the periphery of the adjustment guide plate 201. A sliding lifting plate 203 is slidably fitted to one side of the adjustment guide plate 201. A tension spring 205 is connected between the sliding lifting plate 203 and the adjustment guide plate 201. A sliding limit plate 206 is connected below the sliding lifting plate 203. The sliding limit plate 206 slides through the concentration separation adjustment housing 1. A rotating screw 207 is threaded inside the sliding lifting plate 203. The rotating screw 207 is movably connected to the concentration separation adjustment housing 1 through a sealed bearing 208. A lifting limit block 8 is connected to one end of the sliding limit plate 206.

[0027] Through the above technical solution, the guide vane 201 is movably connected to the concentration / lean separation adjustment housing 1 on both sides via rotating shafts 202, enabling flexible adjustment of the guide vane angle. Elastic contact blocks 204 are installed around the guide vane 201 to prevent damage to the rotating screw 207. The sliding lifting plate 203 is elastically connected to the guide vane 201 via a tension spring 205, and a sliding limit plate 206 is fixed below it. A lifting limit block 8 is provided at the end of the sliding limit plate 206 to limit the sliding stroke. The rotating screw 207 is connected to the housing via a sealed bearing 208 and threadedly engages with the sliding lifting plate 203, driving the lifting motion of the sliding lifting plate 203 through the rotation of the rotating screw 207.

[0028] The rotation of the lead screw 207 causes the sliding lifting plate 203 to move vertically, which in turn changes the tilt angle of the guide plate 201 by pulling the spring 205. When the angle of the guide plate increases, the cross-sectional area of ​​the concentrated side channel decreases, and the coal powder concentration increases; conversely, the concentration decreases.

[0029] like Figure 1-4 As shown, according to the coal powder concentration separator of this utility model embodiment, the adjustment drive assembly 3 includes a transmission worm gear 301, which is respectively installed on one end of the rotating lead screw 207. A transmission worm 302 is meshed on one side of the transmission worm gear 301, and a worm fixing frame 303 is meshed around the transmission worm 302. The worm fixing frame 303 is connected to the concentration separation adjustment housing 1. A servo motor 304 is connected to one end of the transmission worm 302. The housing of the servo motor 304 is connected to the worm fixing frame 303. A dust concentration sensor 5 is installed inside the concentration separation adjustment housing 1. A controller 6 is installed on one side of the concentration separation adjustment housing 1. The dust concentration sensor 5 and the servo motor 304 are electrically connected to the controller 6.

[0030] Through the above technical solution, the adjustment drive assembly 3 is driven by the servo motor 304, the transmission worm 302 meshes with the transmission worm wheel 301, and the worm wheel is fixed to the end of the rotating lead screw 207. The worm gear fixing bracket 303 fixes the transmission worm 302 to the housing to ensure transmission stability. The servo motor 304 receives signals through the controller 6 to achieve automated control.

[0031] Based on the feedback signal from the dust concentration sensor 5, the controller 6 drives the servo motor 304 to rotate the transmission worm gear 302, which in turn drives the transmission worm wheel 301 and the rotating screw 207 to rotate.

[0032] like Figure 1-4 As shown, according to the embodiment of the present utility model, the coal powder concentration separator includes a preliminary concentration separation component 4, which is connected to a preliminary separation installation cylinder 401. The preliminary separation installation cylinder 401 is connected to the concentration separation adjustment housing 1. A preliminary separation spiral blade 402 is installed inside the preliminary separation installation cylinder 401. A coal powder inlet pipe 403 is connected to one side of the preliminary separation installation cylinder 401. A support frame 7 is connected below the concentration separation adjustment housing 1 to support the concentration separation adjustment housing 1.

[0033] According to the above technical solution, the preliminary concentration-dilute separation component 4 includes a preliminary separation mounting cylinder 401, inside which a preliminary separation spiral blade 402 is installed for initial centrifugal separation of the pulverized coal airflow. The pulverized coal inlet pipe 403 is connected to the preliminary separation mounting cylinder 401, and inputs the pulverized coal into the concentration-dilute adjustment component 2.

[0034] The coal powder gas flow enters the preliminary separation installation cylinder 401 through the coal powder inlet pipe 403. Under the centrifugal action of the preliminary separation spiral blade 402, the coal powder particles are initially separated.

[0035] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0036] In summary, with the aid of the above-mentioned technical solution of this utility model, the preliminary concentration-degradation separation component 4 includes a preliminary separation mounting cylinder 401, inside which a preliminary separation spiral blade 402 is installed for the initial centrifugal separation of the pulverized coal airflow. The pulverized coal inlet pipe 403 is connected to the preliminary separation mounting cylinder 401, and inputs the pulverized coal into the concentration-degradation adjustment component 2;

[0037] Based on the feedback signal from the dust concentration sensor 5, the controller 6 drives the servo motor 304 to rotate the transmission worm gear 302, which in turn drives the transmission worm wheel 301 and the rotating screw 207 to rotate.

[0038] The rotation of the lead screw 207 causes the sliding lifting plate 203 to move vertically, which in turn changes the tilt angle of the guide plate 201 by pulling the spring 205. When the angle of the guide plate increases, the cross-sectional area of ​​the concentrated side channel decreases, and the coal powder concentration increases; conversely, the concentration decreases.

[0039] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pulverized coal concentration separator, characterized in that, It includes a concentration separation and adjustment housing (1), a concentration adjustment component (2) is provided inside the concentration separation and adjustment housing (1), an adjustment drive component (3) is provided on one side of the concentration adjustment component (2), and a preliminary concentration separation component (4) is provided on one side of the adjustment drive component (3). The concentration adjustment assembly (2) includes an adjustment guide plate (201), with rotating shafts (202) symmetrically connected to both sides of the adjustment guide plate (201). The adjustment guide plate (201) is movably connected to the concentration separation adjustment housing (1) via the rotating shafts (202). An elastic contact block (204) is connected to the periphery of the adjustment guide plate (201). A sliding lifting plate (203) is slidably fitted on one side of the adjustment guide plate (201). A tension spring (205) is connected between the sliding lifting plate (203) and the adjustment guide plate (201). A sliding limiting plate (206) is connected below the sliding lifting plate (203). The sliding limiting plate (206) slides through the concentration separation adjustment housing (1). A rotating screw (207) is threaded inside the sliding lifting plate (203). The rotating screw (207) is movably connected to the concentration separation adjustment housing (1) via a sealed bearing (208).

2. The pulverized coal concentration separator according to claim 1, characterized in that, One end of the sliding limit plate (206) is connected to a lifting limit block (8).

3. A pulverized coal concentration separator according to claim 2, characterized in that, The adjustment drive assembly (3) includes a transmission worm gear (301), which is installed at one end of the rotating lead screw (207). A transmission worm (302) is meshed on one side of the transmission worm gear (301), and a worm fixing frame (303) is meshed around the transmission worm (302). The worm fixing frame (303) is connected to the concentration-dispersion adjustment housing (1). A servo motor (304) is connected to one end of the transmission worm (302), and the housing of the servo motor (304) is connected to the worm fixing frame (303).

4. A pulverized coal concentration separator according to claim 3, characterized in that, A dust concentration sensor (5) is installed inside the concentration separation and adjustment housing (1).

5. A pulverized coal concentration separator according to claim 4, characterized in that, A controller (6) is installed on one side of the concentration separation and adjustment housing (1), and the dust concentration sensor (5) and the servo motor (304) are electrically connected to the controller (6).

6. A pulverized coal concentration separator according to claim 5, characterized in that, The preliminary concentration-to-dilute separation assembly (4) includes a preliminary separation mounting cylinder (401), which is connected to the concentration-to-dilute separation regulating housing (1). A preliminary separation spiral blade (402) is installed inside the preliminary separation mounting cylinder (401), and a pulverized coal inlet pipe (403) is connected to one side of the preliminary separation mounting cylinder (401).

7. A pulverized coal concentration separator according to claim 6, characterized in that, A support frame (7) is connected to the bottom of the concentration separation and adjustment housing (1).

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