Vertical fluidized bed furnace with more sufficient combustion
By designing the boiling furnace as a vertical structure and introducing a rotating airflow at the bottom, the problem of large coal particles sinking to the bottom and insufficient combustion in the horizontal boiling furnace is solved, achieving a more complete combustion effect, which is suitable for desulfurization gypsum drying.
Patent Information
- Application Number
- CN202422726643.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-08
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-11-08
AI Technical Summary
The existing horizontal boiling furnace has insufficient top space and cannot input strong wind rotating airflow, resulting in large coal particles sinking to the bottom and incomplete combustion.
The main combustion furnace is designed as a vertical structure, and a rotating airflow is added at the bottom. Large particles of coal are blown up by a centrifugal fan for repeated combustion.
It achieves full combustion of large coal particles, improves combustion efficiency, and generates high-temperature hot air for drying desulfurization gypsum.
Smart Images
Figure CN223360865U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a vertical fluidized bed furnace with more complete combustion, belonging to the technical field of fluidized bed furnaces. Background Art
[0002] The fluidized bed furnace is the primary heat source for drying desulfurized gypsum. Its combustion method lies somewhere between laminar combustion and suspended combustion. The operating principle is as follows: High-pressure air passes through a uniform air box, transforming the dynamic pressure head of the primary air into a uniformly distributed static pressure head. This air is then blown into the furnace at high speed and pressure through micropores in the air cap, creating a fluidized bed that forms an air cushion. This lifts and tumbles coal particles with a diameter of 0-10 mm and a thickness of 300-500 mm. The high-pressure air expands the interstices between the coal particles, causing them to move violently. This constant tumbling and bouncing of the coal bed mixes with the air, causing the original 300-500 mm layer to rise to a height of 800-1400 mm. At this point, the fuel in the fluidized bed mixes thoroughly with the hot ash with a carbon content of 1-2%, burning at temperatures typically reaching 950°C, equivalent to a large heat storage tank.
[0003] The main combustion furnace of the existing boiling furnace is generally a horizontal structure with insufficient top space, and cannot input a strong rotating airflow, because the input of a strong rotating airflow will cause the coal particles to be blown out of the main combustion furnace, causing larger particles of coal to sink to the bottom, resulting in incomplete combustion.
[0004] Therefore, how to provide a vertical fluidized bed furnace with more complete combustion is the research purpose of this utility model. Utility Model Content
[0005] In response to the shortcomings of the above-mentioned technology, the utility model provides a vertical boiling furnace with more complete combustion. The main combustion furnace is set as a vertical structure, and a rotating airflow is added at the bottom of the main combustion furnace to blow up large particles of coal and burn them repeatedly, so that the coal particles burn more completely.
[0006] In order to solve the existing technical problems, the technical solution adopted by the utility model is:
[0007] A vertical boiling furnace with more complete combustion is characterized in that it includes a feeder and a vertical combustion furnace, the discharge end of the feeder is provided with a first conveyor belt, the discharge end of the first conveyor belt is provided with a lifting conveyor belt, the discharge end of the lifting conveyor belt is provided with a rolling screen, the lower end of the rolling screen is provided with an elevator, the discharge end of the elevator is provided with a transfer bin, the discharge end of the transfer bin is connected to the feed port of the vertical combustion furnace, the bottom of the vertical combustion furnace is connected to a centrifugal fan, the top is connected to a cyclone dust collector, and the discharge end of the cyclone dust collector is connected to a drying tower.
[0008] Furthermore, the centrifugal fan is connected to the vertical combustion furnace via a spiral air duct.
[0009] Furthermore, an axial flow fan is provided on the top of the drying tower, and the air inlet end of the axial flow fan is connected to the air outlet end of the cyclone dust collector through an air duct.
[0010] Furthermore, the transfer bin is arranged directly above the centrifugal fan through a vertical bracket.
[0011] Furthermore, a discharge pipe is integrally provided at the bottom of the cyclone dust collector, and a waste hopper is provided below the discharge pipe.
[0012] The beneficial effects of the utility model are as follows: the main combustion furnace is set as a vertical structure, and a rotating airflow is added at the bottom of the main combustion furnace to blow up large particles of coal and burn them repeatedly, so that the coal particles burn more fully. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a structural diagram of the present utility model.
[0014] Figure 2 It is a structural schematic diagram of the feeder and the first conveyor belt of the utility model.
[0015] Figure 3 It is a structural diagram of the roller screen and the elevator of the utility model.
[0016] Figure 4 It is a structural schematic diagram of the utility model roller screen.
[0017] Figure 5 It is a structural schematic diagram of the centrifugal fan and vertical combustion furnace of the utility model.
[0018] Among them: feeder 1, vertical combustion furnace 2, first conveyor belt 3, lifting conveyor belt 4, roller screen 5, elevator 6, transfer bin 7, centrifugal fan 8, cyclone dust collector 9, drying tower 10, axial flow fan 11, discharge pipe 12, waste hopper 13. DETAILED DESCRIPTION
[0019] In order to make those skilled in the art better understand the technical solution of the present invention, Figure 1-5 Further analysis of this utility model is made.
[0020] like Figure 1-5As shown, a vertical boiling furnace with more complete combustion is characterized in that it includes a feeder 1 and a vertical combustion furnace 2, the discharge end of the feeder 1 is provided with a first conveyor belt 3, the discharge end of the first conveyor belt 3 is provided with a lifting conveyor belt 4, the discharge end of the lifting conveyor belt 4 is provided with a rolling screen 5, the lower end of the rolling screen 5 is provided with a hoist 6, the discharge end of the hoist 6 is provided with a transfer bin 7, the discharge end of the transfer bin 7 is connected to the feed port of the vertical combustion furnace 2, the bottom of the vertical combustion furnace 2 is connected to a centrifugal fan 8, the top is connected to a cyclone dust collector 9, and the discharge end of the cyclone dust collector 9 is connected to a drying tower 10.
[0021] In this embodiment, preferably, the centrifugal fan 8 is connected to the vertical combustion furnace 2 via a spiral air duct, and the air blown out by the centrifugal fan 8 forms a rotating airflow in the spiral air duct and is transported to the interior of the vertical combustion furnace 2.
[0022] In this embodiment, preferably, an axial flow fan 11 is provided at the top of the drying tower 10, and the air inlet end of the axial flow fan 11 is connected to the air outlet end of the cyclone dust collector 9 through an air duct, so as to extract the high-temperature hot air in the cyclone dust collector 9 into the drying tower to dry the desulfurized gypsum.
[0023] In this embodiment, preferably, the transfer bin 7 is arranged directly above the centrifugal fan 8 through a vertical bracket.
[0024] In this embodiment, preferably, a discharge pipe 12 is integrally provided at the bottom of the cyclone dust collector 9 , and a waste hopper 13 is provided below the discharge pipe 12 for receiving the coal dust filtered out by the cyclone dust collector 9 .
[0025] When the present invention is used, coal particles fall from the feeder 1 onto the first conveyor belt 3, which conveys the coal particles to the lifting conveyor belt 4 by the first conveyor belt 3, and then to the roller screen 5 by the lifting conveyor belt 4. After the coal agglomerates are filtered out by the roller screen 5, the granular coal particles fall onto the elevator 6, which conveys the coal particles to the transfer bin 7 by the elevator 6, and then to the transfer bin 7 to feed the material into the vertical combustion furnace 2. At this time, the centrifugal fan 8 blows a rotating airflow into the vertical combustion furnace 2 to blow up the coal particles in the vertical combustion furnace 2. When the coal particles are blown up to a certain height (because the combustion furnace is a vertical structure, there is enough space inside the combustion furnace for the coal particles to be blown up), they fall down due to their own gravity. The blowing and falling are repeated so that they are fully burned to form high-temperature hot air. After the cyclone dust collector 9 removes the dust, the hot air is conveyed to the drying tower 10 to dry the desulfurized gypsum.
[0026] In summary, the vertical boiling furnace of the present invention sets the main combustion furnace as a vertical structure, and adds a rotating airflow at the bottom of the main combustion furnace to blow up large particles of coal and burn them repeatedly, so that the coal particles burn more fully.
[0027] The above is a detailed introduction to the technical solution provided by the present application. Examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above examples is only used to help understand the method of the present application and its core ideas. At the same time, for those skilled in the art, according to the ideas of the present application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present application.
Claims
1. A vertical fluidized bed furnace with more complete combustion, characterized by: It includes a feeder and a vertical combustion furnace. The discharge end of the feeder is provided with a first conveyor belt, the discharge end of the first conveyor belt is provided with a lifting conveyor belt, the discharge end of the lifting conveyor belt is provided with a rolling screen, the lower end of the rolling screen is provided with an elevator, the discharge end of the elevator is provided with a transfer bin, the discharge end of the transfer bin is connected to the feed port of the vertical combustion furnace, the bottom of the vertical combustion furnace is connected to a centrifugal fan, the top is connected to a cyclone dust collector, and the discharge end of the cyclone dust collector is connected to a drying tower.
2. A vertical fluidized bed furnace with more complete combustion according to claim 1, characterized in that: The centrifugal fan is connected to the vertical combustion furnace via a spiral air duct.
3. A vertical fluidized bed furnace with more complete combustion according to claim 1, characterized in that: An axial flow fan is provided on the top of the drying tower, and an air inlet end of the axial flow fan is connected to an air outlet end of the cyclone dust collector through an air duct.
4. A vertical fluidized bed furnace with more complete combustion according to claim 1, characterized in that: The transfer bin is arranged directly above the centrifugal fan through a vertical bracket.
5. A vertical fluidized bed furnace with more complete combustion according to claim 1, characterized in that: A discharge pipe is integrally provided at the bottom of the cyclone dust collector, and a waste hopper is provided below the discharge pipe.