Empty flue of gasification ash boiler
By designing a combination of empty flue and water-cooled wall in the gasified ash slag boiler, the corrosion problem of flue gas on the superheater tube bundle is solved, and efficient cooling of flue gas and long life of the equipment is achieved.
Patent Information
- Application Number
- CN202421387662.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-18
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2034-06-18
AI Technical Summary
After the gasified ash slag produced during coal combustion is burned, the heat in the flue gas will corrode the tube bundles of the superheater.
设计了一种气化灰渣锅炉空烟道,包括竖向设置的空烟道和内设有水冷包墙,烟气在空烟道中与水冷包墙多次传热,降温后输出,减少对过热器管束的腐蚀。
Through multiple heat transfers between the flue gas and the water-cooled wall, the flue gas is efficiently cooled, reducing the corrosion of the flue gas on the superheater tube bundles and extending the service life of the equipment.
Smart Images
Figure CN222864977U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of gasification ash recycling, and in particular relates to an empty flue of a gasification ash boiler. Background Art
[0002] At present, some factories often burn coal as fuel in industrial production to provide energy for industrial production. However, in the process of coal combustion, incomplete combustion will occur more or less and gasification ash will be produced.
[0003] After the gasification ash is burned, a superheater is often used to exchange heat with the flue gas. However, the flue gas produced contains a large amount of heat, which can easily cause corrosion to the tube bundle of the superheater. Utility Model Content
[0004] The utility model overcomes the defects of the prior art and provides an empty flue of a gasification ash boiler, which can reduce the corrosion of the flue gas to the superheater tube bundle.
[0005] The purpose of the utility model is achieved through the following technical solutions:
[0006] A gasification ash boiler empty flue comprises a vertically arranged empty flue, a water-cooled wall is arranged in the empty flue, an input port for inputting flue gas is arranged at the upper end of the empty flue, the axial direction of the input port is perpendicular to the axial direction of the empty flue, and an output port for outputting flue gas is arranged at the lower end of the empty flue, and the output port is connected to a superheater.
[0007] The beneficial effect of adopting the above technical solution is that after the flue gas enters the empty flue vertically from the input port, it can transfer heat with the water-cooled wall in the empty flue multiple times, so that the flue gas can be efficiently cooled down, and the flue gas is cooled and then output from the output port and acts on the heating surface of the superheater, thereby reducing the corrosion of the superheater tube bundle by the flue gas.
[0008] In one embodiment, the water-cooled wall includes water-cooled walls arranged at the front side, the rear side, the left side and the right side of the empty flue.
[0009] The beneficial effect of adopting the above technical solution is that the water-cooled walls on the front, rear, left and right sides of the empty flue together form a water-cooled wall to perform water cooling on the front, rear, left and right sides of the empty flue.
[0010] In one embodiment, the input end and the output end of the water-cooled wall are respectively connected to a lower header for supplying water and an upper header for discharging a steam-water mixture.
[0011] The beneficial effects of adopting the above technical solution are: the lower header can collect water and then supply it to the water-cooled wall, and the upper header can collect the steam-water mixture produced in the water-cooled wall and then discharge it to the outside.
[0012] In one embodiment, the lower header and the input end of the water-cooled wall, and the upper header and the output end of the water-cooled wall are both connected through a plurality of connecting pipes.
[0013] The beneficial effects of adopting the above technical solution are: the lower header discharges water into the water-cooled wall through several connecting pipes to facilitate the supply of water to multiple positions of the water-cooled wall; the upper header discharges the steam-water mixture through several connecting pipes to facilitate the discharge of the steam-water mixture from multiple positions of the water-cooled wall.
[0014] In one embodiment, the output port is connected to a diverting frame for diverting the smoke.
[0015] The beneficial effect of adopting the above technical solution is that the smoke output from the output port is turned at the turning frame, which is conducive to causing the ash mixed in the smoke to fall from the smoke due to inertia.
[0016] In one embodiment, an upper end of one side of the turning frame is connected to the lower end of the empty flue, and an upper end of the other side of the turning frame is used to connect to the lower end of another flue provided with a superheater.
[0017] The beneficial effect of adopting the above technical solution is that the flue gas needs to make a large turn when entering another flue from an empty flue, so that the ash mixed in the flue gas will fall from the flue gas due to inertia, thereby reducing the dust content of the flue gas entering the other flue, and reducing the contamination of the superheater to a certain extent.
[0018] In one embodiment, the lower end of the turning frame is connected to an ash hopper.
[0019] The beneficial effect of adopting the above technical solution is that the lower end of the turning frame is connected to an ash hopper, which is convenient for collecting the ash dropped from the empty flue, the turning frame and another flue.
[0020] In one embodiment, at least two ash discharge ports are provided at the lower end of the ash hopper.
[0021] The beneficial effect of adopting the above technical solution is: at least two ash discharge ports are provided, so that when one ash discharge port is blocked, the other ash discharge ports can be used to discharge ash or clear the blockage.
[0022] In one embodiment, a valve is provided at the ash discharge port.
[0023] The beneficial effect of adopting the above technical solution is that the ash discharge port can be opened or closed by opening or closing the valve, thereby facilitating the control of ash discharge.
[0024] In one embodiment, a plurality of suspension rods for suspending the empty flue are connected to the empty flue.
[0025] The beneficial effect of adopting the above technical solution is that the empty flue can be suspended to the top of the room through a suspension rod.
[0026] The beneficial effects of the utility model are:
[0027] After the flue gas enters the empty flue vertically from the input port, it can transfer heat with the water-cooled wall in the empty flue multiple times, so that the flue gas can be efficiently cooled down. After the flue gas is cooled, it is output from the output port and acts on the heating surface of the superheater, thereby reducing the corrosion of the flue gas to the superheater tube bundle. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings.
[0029] in:
[0030] Figure 1 A schematic structural diagram of an embodiment of the utility model is shown;
[0031] In the drawings, like reference numerals are used for like parts. The drawings are not necessarily to scale.
[0032] Reference numerals:
[0033] 1- air flue, 2- input port, 3- water-cooled wall, 4- output port, 5- turning frame, 6- ash hopper, 7- valve, 8- ash discharge port, 9- superheater. DETAILED DESCRIPTION
[0034] The utility model will be further described below in conjunction with the accompanying drawings.
[0035] The utility model provides an empty flue of a gasification ash boiler, such as Figure 1 As shown, it includes a vertically arranged empty flue 1, a water-cooled wall 3 is arranged in the empty flue 1, an input port 2 for inputting flue gas is arranged at the upper end of the empty flue 1, and the axial direction of the input port 2 is perpendicular to the axial direction of the empty flue 1, and an output port 4 for outputting flue gas is arranged at the lower end of the empty flue 1, and the output port 4 is connected to the superheater 9.
[0036] It can be understood that after the flue gas enters the empty flue 1 vertically from the input port 2, it can transfer heat with the water-cooled wall 3 in the empty flue 1 multiple times, so that the flue gas can be efficiently cooled down, so that the flue gas is cooled and then output from the output port 4 and acts on the heating surface of the superheater 9, thereby reducing the corrosion of the flue gas to the tube bundle of the superheater 9.
[0037] In one embodiment, the water-cooled enclosure wall 3 includes water-cooled walls arranged at the front side, the rear side, the left side and the right side of the empty flue 1 .
[0038] It can be understood that the water-cooled walls at the front, rear, left and right sides of the empty flue 1 together constitute a water-cooled enclosure wall 3 to perform water cooling at the front, rear, left and right sides of the empty flue 1 .
[0039] In one embodiment, the input end and the output end of the water-cooled wall are respectively connected to a lower header for supplying water and an upper header for discharging a steam-water mixture.
[0040] It can be understood that the lower header can collect water and then supply it to the water-cooled wall, and the upper header can collect the steam-water mixture produced in the water-cooled wall and then discharge it to the outside.
[0041] In one embodiment, the lower header and the input end of the water-cooled wall, and the upper header and the output end of the water-cooled wall are both connected through a plurality of connecting pipes.
[0042] It can be understood that the header discharges water into the water-cooled wall through several connecting pipes to facilitate the supply of water to multiple locations of the water-cooled wall; the upper header discharges the steam-water mixture through several connecting pipes to facilitate the discharge of the steam-water mixture from multiple locations of the water-cooled wall.
[0043] In one embodiment, the outlet 4 is connected to a deflection frame 5 for deflecting the smoke.
[0044] It can be understood that the smoke output from the output port 4 is turned at the turning frame 5, which is conducive to causing the ash mixed in the smoke to fall from the smoke due to inertia.
[0045] In one embodiment, the upper end of one side of the turning frame 5 is connected to the lower end of the empty flue 1, and the upper end of the other side of the turning frame 5 is used to connect to the lower end of another flue provided with a superheater 9; wherein, the other flue is preferably also arranged vertically.
[0046] It is understandable that the flue gas needs to make a 180° turn from the empty flue 1 to another flue, so that the ash mixed in the flue gas will fall from the flue gas due to inertia, thereby reducing the dust content of the flue gas entering the other flue, and reducing the contamination of the superheater 9 to a certain extent.
[0047] In one embodiment, the lower end of the turning frame 5 is connected to an ash hopper 6 to facilitate the collection of ash dropped from the empty flue 1, the turning frame 5 and another flue.
[0048] In one embodiment, at least two ash discharge ports 8 are provided at the lower end of the ash hopper 6 , so that when one ash discharge port 8 is blocked, the other ash discharge ports 8 can be used to discharge ash or clear the blockage.
[0049] In one embodiment, a valve 7 is provided at the ash discharge port 8 .
[0050] It can be understood that by opening or closing the valve 7, the ash discharge port 8 can be opened or closed, thereby facilitating the control of ash discharge.
[0051] It should be noted that the valve 7 can be a manual valve or an electric valve; since the empty flue 1 has a certain height, the valve 7 is preferably an electric valve.
[0052] In one embodiment, a plurality of suspension rods for suspending the empty flue 1 are connected to the empty flue 1 .
[0053] It can be understood that the empty flue 1 can be suspended to the indoor ceiling by a suspension rod.
[0054] In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc., indicating directions or positional relationships, are based on the directions 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 device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0055] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely examples of the principles and applications of the present invention. It should therefore be understood that many modifications may be made to the exemplary embodiments, and other arrangements may be designed without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the features described in the various dependent claims and herein may be combined in a manner different from that described in the original claims. It may also be understood that the features described in conjunction with the individual embodiments may be used in other described embodiments.
Claims
1. An empty flue of a gasification ash boiler, characterized in that: The invention comprises a vertically arranged empty flue (1), wherein a water-cooled wall (3) is arranged in the empty flue (1), an input port (2) for inputting flue gas is arranged at the upper end of the empty flue (1), the axial direction of the input port (2) is perpendicular to the axial direction of the empty flue (1), and an output port (4) for outputting flue gas is arranged at the lower end of the empty flue (1), and the output port (4) is connected to a superheater (9); The water-cooling wall (3) comprises water-cooling walls arranged on the front side, the rear side, the left side and the right side of the empty flue (1); The input end and output end of the water-cooled wall are respectively connected to a lower header for supplying water and an upper header for discharging a steam-water mixture; the lower header and the input end of the water-cooled wall, and the upper header and the output end of the water-cooled wall are connected through a plurality of connecting pipes.
2. The empty flue of a gasification ash boiler according to claim 1, characterized in that: The output port (4) is connected to a deflection frame (5) for deflecting the smoke.
3. The empty flue of a gasification ash boiler according to claim 2, characterized in that: An upper end of one side of the turning frame (5) is connected to the lower end of the empty flue (1), and an upper end of the other side of the turning frame (5) is used to connect to the lower end of another flue provided with the superheater (9).
4. The empty flue of a gasification ash boiler according to claim 2, characterized in that: The lower end of the steering frame (5) is connected to an ash hopper (6).
5. The empty flue of a gasification ash boiler according to claim 4, characterized in that: At least two ash discharge ports (8) are provided at the lower end of the ash hopper (6).
6. The empty flue of a gasification ash boiler according to claim 5, characterized in that: A valve (7) is provided at the ash discharge port (8).
7. The empty flue of a gasification ash boiler according to claim 1, characterized in that: The empty flue (1) is connected to a plurality of suspension rods for suspending the empty flue (1).