A slag movement test platform for multi-tube drum slag cooler

Abstract

The present invention discloses a multi-tube roller slag cooler slag movement test platform, including a slag feeding device, a test roller and a transmission device; the slag feeding device is closed and connected to the test roller; the test roller is arranged obliquely from the feed port to the discharge port; the test roller is driven to rotate by the transmission device. Compared with the existing rotary kiln test bench, a different structure is provided, in which the slag rolls in the cold slag tube and performs projectile motion during movement. The movement law of the material is different, which is helpful for analyzing and studying the heat transfer of the slag and provides the necessary conditions for heat transfer research. The test roller adopts a cold slag tube made of transparent organic glass, which can effectively reduce the weight of the test bench. At the same time, it is convenient to intuitively observe the movement state of the slag in the cold slag tube during the test, which is convenient for recording and observation.

Description

Technical Field

[0001] The invention relates to the technical field of coal-fired power generation, in particular to an ash movement test platform for a multi-tube drum slag cooler. Background Art

[0002] The slag cooler is an important auxiliary equipment of the circulating fluidized bed (CFB). The equipment plays an important role in the waste heat recovery of ash slag. Among them, the movement of ash slag in the slag cooler includes lateral movement and axial movement. The lateral movement mainly affects the ash slag mixing, and the ash slag mixing is conducive to reducing the temperature difference between the ash slag in the cross section. The more uniform the mixing, the more conducive to the heat transfer of the ash slag. The axial movement mainly affects the output of the slag cooler. When the length and diameter of the slag cooler are the same, the faster the axial movement, the stronger the output of the slag cooler.

[0003] At present, the test bench for particle movement is mainly focused on studying the material movement characteristics and residence time in the cylindrical rotary kiln. However, the movement state of the particles in the cylinder of this equipment is sliding. At the same time, the structural difference will inevitably cause the change of the material movement state. It cannot provide strong experimental data for the output and heat transfer characteristics of the slag cooler. Summary of the invention

[0004] In order to overcome the above-mentioned technical defects, the purpose of the present invention is to provide a multi-tube drum slag cooler slag movement test platform in which the slag rolls in the cooling slag tube and performs projectile motion during movement, which is helpful for heat transfer analysis and research of the slag.

[0005] In order to achieve the above object, the present invention is implemented by the following technical solutions:

[0006] The technical solution is a multi-tube drum slag cooler ash movement test platform, including a slag feeding device, a test drum and a transmission device; the slag feeding device is closed and connected to the test drum; the test drum is arranged obliquely from the feed port to the discharge port; the test drum is driven to rotate by the transmission device.

[0007] Further preferably, the test roller includes a left cooling slag tube tray, a right cooling slag tube tray, a steel bar and a cooling slag tube; the left cooling slag tube tray and the right cooling slag tube tray are connected by a steel bar, and cooling slag tubes are arranged in the middle of the left cooling slag tube tray and the right cooling slag tube tray; the slag feeding device is closed and connected to the left cooling slag tube tray.

[0008] Further preferably, two centrally symmetrical cooling slag pipes are provided in the test drum; and the cross section of the cooling slag pipe is a hexagonal prism structure.

[0009] Further preferably, a plurality of fins are evenly arranged axially along the inner wall of the cooling slag pipe; the number of the fins is no less than 12.

[0010] More preferably, the slag cooling pipe is a plexiglass tube.

[0011] More preferably, the test roller is installed at an inclination angle of 1° to 5°.

[0012] Further preferably, the slag feeding device is in the shape of a conical funnel.

[0013] Further preferably, the transmission device is a roller transmission device arranged outside the test drum; the roller transmission device includes a motor, a reducer, rollers and roller supports.

[0014] Beneficial technical effects:

[0015] Compared with the existing rotary kiln test bench, a new structure is provided. The slag rolls in the cold slag pipe and performs projectile motion during movement. The movement law of the material is different, which is helpful for the analysis and research of heat transfer of the slag and provides the necessary conditions for heat transfer research. The test drum adopts a cold slag pipe made of transparent organic glass, which can effectively reduce the weight of the test bench. At the same time, it is convenient to intuitively observe the movement state of the slag in the cold slag pipe during the test, which is convenient for recording and observation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will now be described by way of example with reference to the accompanying drawings, in which:

[0017] Figure 1 It is a schematic diagram of the arrangement structure of the cooling slag pipe in the present invention.

[0018] Figure 2 yes Figure 1 Schematic diagram of the cross-sectional structure along the A axis.

[0019] Figure 3 yes Figure 1 The cross-sectional structural diagram along the B direction is the structural diagram of the transmission device.

[0020] Markings in the figure:

[0021] Slag feeding device 1, transmission device 2, left cold slag pipe tray 3, right cold slag pipe tray 4, steel bar 5, cold slag pipe 6, test platform 7, roller transmission device including motor, reducer, roller and roller support. DETAILED DESCRIPTION

[0022] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0023] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] Examples, such as Figure 1-Figure 3As shown in the figure, the present invention is a multi-tube roller slag cooler ash movement test platform, including a slag feeding device 1, a test roller and a transmission device 2; the slag feeding device 1 is closed and connected to the test roller; the test roller is arranged obliquely from the feed port to the discharge port; the test roller is driven to rotate by the transmission device 2.

[0025] The test roller includes a left cold slag pipe tray 3, a right cold slag pipe tray 4, a steel bar 5 and a cold slag pipe 6; the left cold slag pipe tray 3 and the right cold slag pipe tray 4 are connected by a steel bar 5, and a cold slag pipe 6 is arranged in the middle of the left cold slag pipe tray 3 and the right cold slag pipe tray 4; the slag feeding device 1 is closed and connected to the left cold slag pipe tray 3. Two centrally symmetrical cold slag pipes 6 are arranged in the test roller, and the two cold slag pipes are symmetrically arranged to reduce the number of cold slag pipes, achieve dynamic balance of the test roller during operation, and improve the operability of the test; the cross-section of the cold slag pipe 6 is a hexagonal prism structure. The outer diameter of the cold slag pipe tray is φ1200mm, and two φ350mm hexagonal cold slag pipes are symmetrically arranged in the middle. The inner wall of the cold slag pipe is provided with 12 longitudinal ribs with a length of 1000mm.

[0026] A plurality of fins are evenly arranged along the inner wall of the cold slag pipe 6 in the axial direction; the number of fins is not less than 12. The inner wall of the cold slag pipe is provided with fins, so that the slag moves in the cold slag pipe in a projectile motion instead of just rolling, so that the test conditions are more consistent with the actual operating conditions.

[0027] The slag cooling pipe 6 is made of organic glass, which is convenient for visually observing and recording the movement trajectory of the slag.

[0028] The test drum is installed at an inclination angle of 1° to 5°. When the cold slag tube tray rotates, the ash moves from top to bottom under the action of gravity.

[0029] The slag feeding device 1 is in the shape of a conical funnel. The slag feeding device includes a slag feeding inlet, a connecting throat and a conical funnel, which are formed by bending and welding three sections. The connecting flange of the slag feeding device is aligned and locked with the rib plate of the left cold slag pipe tray through the bolt holes, and a material seal is formed between the contact surfaces; the cold slag pipe is installed in the hexagonal hole of the cold slag pipe tray to achieve synchronous rotation with the test roller; the test roller is placed on the roller, and the left and right cold slag pipe trays are fixed with connecting steel bars. One end of the roller is supported by the roller support, and the other end is connected to the connecting sleeve and fixed by bolts.

[0030] The transmission device 2 is a roller transmission device arranged outside the test drum; the roller transmission device includes a motor, a reducer, rollers and roller supports. The motor transmits the power output to the rollers through the reducer, and the rollers are installed on the roller supports. The transmission device is combined with a frequency converter to achieve stepless speed change of the rotation speed, so as to adjust the slag discharge speed according to different working conditions. A motor is installed on the side of the test platform 7, and the test drum is adjusted by 2 to 10 r / min through the frequency converter. The motor outputs power to the transmission shaft through the belt drive, and the transmission shaft realizes power transmission with the rollers through the connecting sleeve. The left and right cold slag pipe trays placed on the rollers are rotated under the action of friction. The test drum is directly placed on the outer rubber tube of the roller, and the friction of the rubber tube drives the test drum to rotate.

[0031] 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 and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A multi-tube drum slag cooler ash movement test platform, characterized by: It comprises a slag feeding device, a test roller and a transmission device; the slag feeding device is sealed and connected with the test roller; the test roller is arranged obliquely from the feed port to the discharge port; the test roller is driven to rotate by the transmission device, and the test roller comprises a left cold slag tube tray, a right cold slag tube tray, a steel bar and a cold slag tube; the left cold slag tube tray and the right cold slag tube tray are connected by a steel bar, and a cold slag tube is arranged in the middle of the left cold slag tube tray and the right cold slag tube tray; the slag feeding device is sealed and connected with the left cold slag tube tray, the slag feeding device is in a conical funnel shape, and two cold slag tubes in a centrally symmetrical manner are arranged in the test roller; the cross section of the cold slag tube is a hexagonal prism structure, and a plurality of fins are evenly arranged along the axial direction of the inner wall of the cold slag tube; the number of the fins is not less than 12, the cold slag tube adopts an organic glass tube, and the installation inclination angle of the test roller is 1° to 5°; The transmission device is a roller transmission device arranged outside the test roller; the roller transmission device comprises a motor, a reducer, rollers and roller supports.

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