A device for reducing air leakage of dry bottom slag discharge of a boiler

Abstract

The utility model discloses a device for reducing air leakage of dry slag discharge of boiler bottom, concretely relates to dry type slag extractor technical field, including boiler body and slag conveyer, the slag conveyer output fixed with the internal intercommunication of blanking tube, the blanking tube lower extreme is provided with sealing assembly, sealing assembly includes the flange disc of blanking tube connection, the flange disc lower end rotatory mounting has a plurality of side plates, the side plate lower extreme side of mutual approach still is fixed with sealing plate. The utility model discloses a device for reducing air leakage of dry slag discharge of boiler bottom adopts the design of sealing assembly, utilizes the mutual cooperation between torsional spring hinge and a plurality of side plates, makes a plurality of side plates close when the device does not discharge slag, effectively prevents the entry of external air to reduce the air leakage of device, when the device discharges slag, utilizes the gravity of coal cinder and a plurality of side plates open automatically to complete the slagging work, and the operator does not need to control slagging alone, and the operation of device is facilitated.

Description

Technical Field

[0001] This utility model relates to the field of dry slag removal machine technology, and in particular to a device for reducing air leakage during dry slag discharge from the bottom of a boiler. Background Technology

[0002] Dry slag removers are highly valued by the power industry for their energy saving, water saving, environmental protection, and comprehensive benefits. Currently, hundreds of units have been put into operation with dry slag removers. The working process of a dry slag remover is as follows: High-temperature slag falls onto the conveyor belt of the slag remover through the slag discharge gate at the bottom of the furnace. Utilizing the negative pressure in the furnace, ambient air is drawn in to cool the slag. The cold air absorbs the sensible heat of the hot slag and the heat released by the combustion of combustibles in the slag before entering the furnace. The slag remover operates continuously under high-temperature conditions.

[0003] Chinese patent document CN213453687U discloses a device for reducing air leakage during dry slag discharge from the boiler bottom. The device includes a boiler, a dry slag machine placed at the bottom of the boiler, a feed pipe placed between the boiler and the dry slag machine, an exhaust pipe located on one side of the feed pipe, an air supply damper and a temperature monitor installed on the dry slag machine, and a slag bin located at the bottom of the tail end of the dry slag machine. A cyclone separator is connected to the exhaust pipe. The cyclone separator separates the drawn-in gas, and the slag is then transported to the slag bin through the slag delivery pipe. A secondary air box is connected to the boiler via an air supply pipe. The dry slag machine includes a straight section and an ascending section. The straight section is located at the bottom of the feed pipe, and the tail end of the ascending section is located above the slag bin. The air supply dampers are evenly distributed on both sides of the straight and ascending sections of the dry slag machine. This invention solves the problem of cold air leakage after the exchange of hot slag with the boiler bottom, improves waste heat recovery and utilization, and reduces resource waste.

[0004] However, in actual use, the device cannot automatically control the slag discharge, requiring operators to control the slag discharge separately, which is inconvenient for the operation of the device. Utility Model Content

[0005] The main purpose of this utility model is to provide a device to reduce air leakage during dry slag discharge from the bottom of a boiler, which can effectively solve the problem of inconvenient operation of the device.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0007] A device for reducing air leakage during dry slag discharge from the bottom of a boiler includes a boiler body and a slag conveyor. The output end of the slag conveyor is fixed with a discharge pipe communicating with its interior, and a sealing component is provided at the lower end of the discharge pipe.

[0008] Preferably, the sealing assembly includes a flange connected to the feed pipe, and a plurality of side plates are rotatably mounted on the lower end of the flange. A sealing plate is also fixed on one side of the lower end of each side plate that is close to the other.

[0009] Preferably, the side plate and the flange are connected by a torsion spring hinge.

[0010] Preferably, a graphite composite pad is also fixed to one side of the plurality of side plates that are in contact with each other.

[0011] Preferably, the top surface of the sealing plate is inclined upward on the side closest to the side plate.

[0012] Preferably, when the torsion springs of the multiple torsion spring hinges are in their natural state, the multiple side plates are closed.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] 1. This utility model adopts a sealing component design, which utilizes the cooperation between the torsion spring hinge and multiple side plates to allow the multiple side plates to close when the device is not discharging slag, effectively preventing the entry of external air and thus reducing air leakage. When the device is discharging slag, the multiple side plates automatically open due to the gravity of the coal slag itself, thereby completing the slag discharge work. There is no need for operators to control the slag discharge separately, which facilitates the operation of the device.

[0015] 2. This utility model adopts an inclined design of the sealing plate, so that the material will not get stuck on the sealing plate when the multiple side plates are opened, thereby causing coal slag to accumulate, making the device more stable during use. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0017] Figure 2 This is a schematic diagram of the sealing assembly of this utility model;

[0018] Figure 3 This is a partial structural diagram of the sealing assembly of this utility model. Figure 1 ;

[0019] Figure 4 This is a partial structural diagram of the sealing assembly of this utility model. Figure 2 .

[0020] In the diagram: 1. Boiler body; 2. Slag conveyor; 3. Feed pipe; 4. Sealing assembly; 41. Flange; 42. Side plate; 43. Sealing plate; 44. Torsion spring hinge; 45. Graphite composite gasket. Detailed Implementation

[0021] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0022] like Figure 1As shown, a device for reducing air leakage during dry slag discharge from a boiler furnace includes a boiler body 1 and a slag conveyor 2. The feed end of the slag conveyor 2 is connected to the discharge end of the boiler body 1, allowing the slag produced by the boiler body 1 to fall into the slag conveyor 2, thereby enabling the slag conveyor 2 to transport the slag. The output end of the slag conveyor 2 is fixed with a discharge pipe 3 that communicates with its interior, and a sealing component 4 is provided at the lower end of the discharge pipe 3.

[0023] like Figure 2 - Figure 4 As shown, the sealing assembly 4 includes a flange 41 connected to the feed pipe 3. A sealing gasket is provided at the connection between the flange 41 and the feed pipe 3 to increase the sealing effect of the device. Multiple side plates 42 are rotatably mounted on the lower end of the flange 41. The side plates 42 are connected to the flange 41 by a torsion spring hinge 44. When the multiple side plates 42 are closed, they can form a regular square frustum (since the cross-section of most slag conveyor 2 pipes is rectangular, the design of a regular square frustum when the multiple side plates 42 are closed can facilitate the sealing of the pipe). A sealing plate 43 is also fixed on the side of the lower end of the side plates 42 that is close to each other. The multiple sealing plates 43 are used to seal the bottom of the regular square frustum, so that when the multiple side plates 42 are sealed, the material in the feed pipe 3 can be prevented from being discharged, thus increasing the sealing performance of the device during use.

[0024] A graphite composite pad 45 is also fixed on one side of the multiple side plates 42 that are in contact with each other. The graphite composite pad 45 has the advantages of good high temperature resistance, reliable sealing under high pressure, and strong friction resistance. Since the slag temperature is high when the device is discharging slag and the slag will rub violently against the graphite composite pad 45 when it falls downwards, the graphite composite pad 45 made of graphite and metal sheet is used to increase the sealing and stability of the device during use.

[0025] like Figure 3 and Figure 4 As shown, the top surface of the sealing plate 43 is inclined upward on the side near the side plate 42, so that when multiple side plates 42 are opened, the material will not get stuck on the sealing plate 43, thereby causing coal slag to accumulate and affecting the normal use of the device.

[0026] like Figure 2 and Figure 3 As shown, when the torsion springs of the multiple torsion spring hinges 44 are in their natural state, the multiple side plates 42 are closed, which can prevent the device from discharging waste residue when it is not required to discharge waste residue, and also increase the sealing performance of the device during use.

[0027] The specific implementation method of this embodiment is as follows: After the boiler body 1 discharges slag, the slag will fall into the slag conveyor 2, and then the slag conveyor 2 will transport the slag.

[0028] When the slag is conveyed into the feed pipe 3, it enters the sealing assembly 4 under the action of gravity and then accumulates on multiple sealing plates 43. Due to the design of the torsion spring hinge 44, after the slag accumulates, the gravity of the slag itself will cause multiple side plates 42 to open, thereby completing the slag discharge work. When the device does not need to discharge slag, the design of multiple torsion spring hinges 44 will cause multiple side plates 42 to close, effectively preventing the entry of external air and thus reducing the air leakage of the device.

[0029] It should be noted that the specific installation methods, circuit connection methods, and control methods of the boiler body 1, slag conveyor 2, and torsion spring hinge 44 in this utility model are all conventional designs, and will not be described in detail in this utility model.

[0030] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for reducing air leakage during dry slag discharge from a boiler bottom, comprising a boiler body (1) and a slag conveyor (2), characterized in that: The output end of the slag conveyor (2) is fixed with a feeding pipe (3) that communicates with its interior, and a sealing component (4) is provided at the lower end of the feeding pipe (3). The sealing assembly (4) includes a flange (41) connected to the feed pipe (3), and a plurality of side plates (42) are rotatably mounted on the lower end of the flange (41). A sealing plate (43) is also fixed on the side of the lower end of the side plates (42) that are close to each other. The side plate (42) is connected to the flange (41) by a torsion spring hinge (44); The top surface of the sealing plate (43) is inclined upward on the side closest to the side plate (42).

2. The device for reducing air leakage during dry ash discharge from the boiler bottom according to claim 1, characterized in that: A graphite composite pad (45) is also fixed on one side of the multiple side plates (42) that are in contact with each other.

3. The device for reducing air leakage during dry ash discharge from the boiler bottom according to claim 1, characterized in that: When the torsion springs of the multiple torsion spring hinges (44) are in their natural state, the multiple side plates (42) are closed.

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