Slag screening device at slag discharge port

Abstract

This utility model discloses a slag screening device for a slag discharge port, including a primary screening plate and a secondary screening plate installed directly below the slag discharge port. The secondary screening plate is spaced apart from the primary screening plate by a set distance. A primary spring is fixedly installed at both ends of the primary screening plate, and a primary vibrator is installed on the side. A secondary spring is fixedly installed at both ends of the secondary screening plate, and a secondary vibrator is installed on the side. The screen aperture of the primary screening plate is 15-18mm, and the screen aperture of the secondary screening plate is 10-12mm. The primary screening plate first filters out slag with larger particle sizes, and the secondary screening plate screens slag suitable for use in biomass boilers. The two-stage screening plates classify and screen the slag, which helps to improve the slag screening efficiency and quality. The slag can be allocated according to its particle size, and the smaller particle size slag can be used as a supplement for biomass boiler slag, achieving the purpose of waste utilization without increasing the workload and labor costs.

Description

Technical Field

[0001] This utility model belongs to the field of screening technology, specifically relating to a screening device for slag at the slag discharge port. Background Technology

[0002] Newly built circulating fluidized bed biomass boilers require a certain thickness of slag to maintain stable combustion in the furnace during operation. Due to the characteristics of biomass boiler fuel, there is more fly ash and less slag. During normal operation, slag needs to be added according to the actual situation. The particle size of the added slag should not be too large in order to ensure that the boiler bed material is kept at the optimal thickness.

[0003] The slag produced after the operation of a circulating fluidized bed coal-fired boiler can be used as a supplement to the slag of a biomass boiler, achieving the purpose of waste utilization. However, the particle size of the slag produced by the combustion of the coal boiler is directly related to the raw coal used. If the particles are too large, the slag cannot be vulcanized in the biomass boiler and cannot be used directly. It is necessary to set up a separate site to manually screen the discharged slag with a screen, which increases the process and cost. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a slag screening device for slag discharge port, which screens the slag at the slag discharge port so that it can be directly used as slag supplement for biomass boilers.

[0005] The technical solution adopted by this utility model is a slag screening device for a slag discharge port, including a primary screening plate and a secondary screening plate installed directly below the slag discharge port. The secondary screening plate is spaced apart from the primary screening plate by a set distance. A primary spring is fixedly installed at the lower ends of both ends of the primary screening plate, and a primary vibrator is installed on the side. A secondary spring is fixedly installed at the lower ends of both ends of the secondary screening plate, and a secondary vibrator is installed on the side. The screen aperture of the primary screening plate is 15-18mm, and the screen aperture of the secondary screening plate is 10-12mm.

[0006] Furthermore, a first-level support plate is fixedly installed below the first-level spring, and the first-level support plate is fixedly installed on the first-level lifting column. A second-level support plate is fixedly installed below the second-level spring, and the second-level support plate is fixedly installed on the second-level lifting column.

[0007] Furthermore, the aforementioned secondary screening plate is provided with isolation plates near both ends, and the primary screening plate is provided with primary guide plates near both ends below the primary screening plate. The bottom ends of the two primary guide plates are inclined inwards corresponding to the isolation plates. The secondary screening plate is provided with two secondary guide plates near both ends below the secondary screening plate. The bottom ends of the two secondary guide plates are inclined inwards.

[0008] Furthermore, the back of the aforementioned primary guide plate is provided with a primary support rod, the top of which is fixedly connected to the primary guide plate, and the bottom of which is fixedly connected to the primary support plate. The back of the secondary guide plate is provided with a secondary support rod, the top of which is fixedly connected to the secondary guide plate, and the bottom of which is fixedly connected to the secondary support plate.

[0009] Furthermore, rubber sheets are suspended below the aforementioned secondary guide vanes.

[0010] Furthermore, the screens of both the primary and secondary screening plates mentioned above are galvanized iron wire mesh.

[0011] Furthermore, it also includes a top plate, which matches the frame of the secondary screening plate and is snapped onto the secondary screening plate. Above the top plate, corresponding to the screen mesh of the primary screening plate, there are several pins. The top of the pins is equipped with a spherical impact block, the diameter of which is smaller than the screen mesh diameter of the primary screening plate.

[0012] Compared with the prior art, the beneficial effects of this utility model are that by setting a primary screening plate and a secondary screening plate below the boiler slag discharge port, and the screen aperture of the primary screening plate is larger than that of the secondary screening plate, the primary screening plate first filters out the slag with larger particle size, and the secondary screening plate screens out the slag suitable for biomass boilers. The two-stage screening plates classify and screen the slag, which helps to improve the slag screening efficiency and quality. The slag can be allocated according to its particle size, and the slag with smaller particle size can be used as a supplement to the biomass boiler slag, thus achieving the purpose of waste utilization without increasing the workload and labor costs. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the assembly of the screening device; Figure 2 This is a top view of the primary screening plate; Figure 3 This is a top view of the secondary screening plate; Figure 4 This is the front view of the top panel. Detailed Implementation

[0014] The present invention will be further explained below with reference to the accompanying drawings to enable those skilled in the art to better understand it.

[0015] Example 1 like Figure 1-4As shown, the slag screening device at the slag discharge port includes a primary screening plate 1 and a secondary screening plate 2 installed directly below the slag discharge port. The secondary screening plate 2 is spaced apart from the primary screening plate 1 by a set distance. Both the primary screening plate 1 and the secondary screening plate 2 include a frame and a screen placed inside the frame. The screen is made of galvanized iron wire mesh. The screen aperture of the primary screening plate 1 is 15-18mm, and the screen aperture of the secondary screening plate 2 is 10-12mm. A primary spring 3 is fixedly installed at the lower ends of the frame of the primary screening plate 1, and a primary vibrator 4 is installed on the side of the frame of the primary screening plate 1. A secondary spring 5 is fixedly installed at the lower ends of the frame of the secondary screening plate 2, and a secondary vibrator 6 is installed on the side of the frame of the secondary screening plate 2. Slag enters the primary screening plate 1 through the slag discharge port. The primary vibrator 4 vibrates, separating slag of different particle sizes. Smaller slag particles enter the secondary screening plate 2, where a secondary vibrator 6 vibrates, further separating slag of different particle sizes. Slag particles smaller than 10mm are discharged below the secondary screening plate 2 and can be directly used as slag replenishment for biomass boilers, achieving waste utilization. By adding two screening plates below the slag discharge port to screen slag of different particle sizes, the current need for manual screening is reduced, lowering labor intensity and costs. Furthermore, the secondary screening is highly efficient and effective.

[0016] Furthermore, a primary support plate 7 is fixedly installed below the primary spring 3, and the primary support plate 7 is fixedly mounted on the primary lifting column 8. A secondary support plate 9 is fixedly installed below the secondary spring 5, and the secondary support plate 9 is fixedly mounted on the secondary lifting column 10. The distance between the primary and secondary screening plates is changed by raising and lowering the primary lifting column 8 and the secondary lifting column 10. When there is less slag to be screened, the distance between the primary and secondary screening plates is reduced to avoid excessive impact on the secondary screening plate. When there is more slag to be screened, the distance between the primary and secondary screening plates is increased to avoid clogging.

[0017] The primary screening plate 1 and the secondary screening plate 2 are respectively equipped with isolation plates 11 near both ends. Primary guide plates 101 are located near both ends below the primary screening plate 2. The bottom ends of the two primary guide plates 101 are inclined inwards corresponding to the isolation plates 11 of the secondary screening plate. Two secondary guide plates 201 are located near both ends below the secondary screening plate 2, with their bottom ends also inclined inwards. The isolation plates keep the slag within the screening area, preventing leakage to the spring. Specifically, the primary guide plates guide the slag screened by the primary screening plate to the screening area of ​​the secondary screening plate, and the secondary guide plates guide the slag screened by the secondary screening plate to the receiving area below.

[0018] To ensure the stability of the primary guide plate 101 and the secondary guide plate 201, a primary support rod 102 is provided on the back of the primary guide plate 101. The top end of the primary support rod 102 is fixedly connected to the primary guide plate 101, and the bottom end is fixedly connected to the primary support plate 7. A secondary support rod 202 is provided on the back of the secondary guide plate 201. The top end of the secondary support rod 202 is fixedly connected to the secondary guide plate 201, and the bottom end is fixedly connected to the secondary support plate 9.

[0019] Furthermore, a rubber sheet 12 is suspended below the aforementioned secondary guide plate 201 to form a slag discharge area, from which slag is directly transported by vehicle. During transportation, the rubber sheet 12 prevents slag ash from flying around.

[0020] Furthermore, the above also includes a top plate 13, which matches the frame of the secondary screening plate 2 and is snapped onto the secondary screening plate 2. Above the top plate 13, corresponding to the screen mesh of the primary screening plate 1, there are several pins 14. The top of the pins 14 is provided with a spherical impact block 15. The diameter of the impact block 15 is smaller than the screen mesh diameter of the primary screening plate 1. After long-term use, the mesh of the primary screening plate is prone to clogging. By installing the top plate on the secondary screening plate 2 and operating the primary and secondary screening plates to move closer together, the pins are inserted into the mesh of the primary screening plate, and the impact block pushes open the blocked slag, thus solving the problem of the primary screening plate being blocked and unable to pass through normally.

[0021] The embodiments described above are merely preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Various modifications and improvements made by those skilled in the art to the technical solutions of the present invention without departing from its design spirit and principles should fall within the protection scope defined by the claims of the present invention.

Claims

1. A slag screening device for a slag discharge port, characterized in that, It includes a primary screening plate and a secondary screening plate installed directly below the slag discharge port. The secondary screening plate is spaced a set distance from the primary screening plate. The primary screening plate has a primary spring fixed at both ends and a primary vibrator installed on its side. The secondary screening plate has a secondary spring fixed at both ends and a secondary vibrator installed on its side. The screen aperture of the primary screening plate is 15-18mm, and the screen aperture of the secondary screening plate is 10-12mm.

2. The slag screening device at the slag discharge port according to claim 1, characterized in that, A primary support plate is fixedly installed below the primary spring and is fixedly mounted on the primary lifting column. A secondary support plate is fixedly installed below the secondary spring and is fixedly mounted on the secondary lifting column.

3. The slag screening device at the slag discharge port according to claim 1, characterized in that, The secondary screening plate is provided with isolation plates near both ends, and the primary screening plate is provided with primary guide plates near both ends below the primary screening plate. The bottom ends of the two primary guide plates are inclined inwards corresponding to the isolation plates. The secondary screening plate is provided with two secondary guide plates near both ends below the secondary screening plate. The bottom ends of the two secondary guide plates are inclined inwards.

4. The slag screening device at the slag discharge port according to claim 3, characterized in that, The back of the primary guide plate is provided with a primary support rod, the top of which is fixedly connected to the primary guide plate and the bottom of which is fixedly connected to the primary support plate. The back of the secondary guide plate is provided with a secondary support rod, the top of which is fixedly connected to the secondary guide plate and the bottom of which is fixedly connected to the secondary support plate.

5. The slag screening device at the slag discharge port according to claim 3, characterized in that, Rubber sheets are suspended below the secondary guide plate.

6. The slag screening device at the slag discharge port according to claim 1, characterized in that, It also includes a top plate that matches the frame of the secondary screening plate and is snapped onto the secondary screening plate. Above the top plate, corresponding to the screen mesh of the primary screening plate, there are several pins. The top of the pins is provided with a spherical impact block, the diameter of which is smaller than the screen mesh diameter of the primary screening plate.

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