Stokehole bin capable of reducing generation of sulfur dioxide
By setting up a mixing chamber and an impact plate in front of the furnace chamber, the full mixing of calcium carbonate and coal is achieved, the problem of poor mixing effect is solved, and the desulfurization effect of sulfur dioxide is improved.
Patent Information
- Application Number
- CN202421818243.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-30
- Publication Date
- 2025-07-25
- Estimated Expiration
- 2034-07-30
AI Technical Summary
In the prior art, calcium carbonate is directly added to the combustion furnace, and the mixing effect is poor, resulting in unsatisfactory sulfur dioxide desulfurization effect.
A primary mixing chamber and a secondary mixing chamber are arranged in front of the furnace front chamber. Calcium carbonate and coal are fully mixed by impacting plates and vibration motors, and the mixture is fed into the combustion furnace together.
The reaction effect between calcium carbonate and coal burning is improved and the desulfurization effect of sulfur dioxide is enhanced.
Smart Images
Figure CN223153553U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a front furnace bin, in particular to a front furnace bin for reducing the generation of sulfur dioxide. Background Art
[0002] Circulating fluidized bed boilers have the advantages of a wide fuel adaptability, good load regulation performance, and high combustion efficiency. Moreover, sulfur dioxide emissions can be reduced by adding calcium carbonate into the furnace. Its desulfurization method is that at the working temperature of 830 - 900 °C in the circulating fluidized bed boiler, calcium carbonate undergoes a decomposition reaction, calcium carbonate decomposes into calcium oxide, and calcium oxide undergoes a chemical reaction with sulfur dioxide generated by coal combustion to form calcium sulfate, thereby achieving the purpose of desulfurization by discharging it in solid form.
[0003] In the prior art, calcium carbonate is directly added into the combustion furnace and fed in by secondary air. However, in actual production, with this feeding method of calcium carbonate, scaling easily occurs, the contact area with coal is small, and the mixing effect is poor. Therefore, the reaction is poor and the desulfurization effect is not ideal.
[0004] Therefore, it is necessary to improve the front furnace bin in the prior art. Content of the Utility Model
[0005] The purpose of the utility model is to overcome the defects existing in the prior art and provide a front furnace bin for reducing the generation of sulfur dioxide, which fully mixes calcium carbonate and coal in advance, and the mixture is fed into the combustion furnace together, improving the reaction effect and thus the desulfurization effect.
[0006] To achieve the above technical effects, the technical solution of the utility model is: a front furnace bin for reducing the generation of sulfur dioxide, including a front furnace bin body and a primary mixing bin communicated with the front furnace bin body. The primary mixing bin is provided with a calcium carbonate inlet and a coal inlet. An impact plate is arranged in the primary mixing bin, and the impact plate is arranged below the calcium carbonate inlet and the coal inlet. A plurality of impact plates are arranged along the circumferential and axial directions of the primary mixing bin.
[0007] The preferred technical solution is that a secondary mixing bin is arranged between the primary mixing bin and the front furnace bin body. The primary mixing bin, the secondary mixing bin, and the front furnace bin body are communicated in sequence from top to bottom. The secondary mixing bin is used to assist in fully mixing calcium carbonate and coal.
[0008] The preferred technical solution is that the front furnace bin body and the primary mixing bin are fixedly arranged, the secondary mixing bin is vibrated, the feed port of the secondary mixing bin is movably connected with the discharge port of the primary mixing bin, and the discharge port of the secondary mixing bin is movably connected with the feed port of the front furnace bin body.
[0009] Preferably, a flexible member is hermetically and fixedly connected between the feed inlet of the secondary mixing bin and the discharge outlet of the primary mixing bin, and between the discharge outlet of the secondary mixing bin and the feed inlet of the front-of-furnace bin body.
[0010] Preferably, an upper connecting plate is fixedly arranged on the primary mixing bin, a lower connecting plate is fixedly arranged on the secondary mixing bin, the upper connecting plate and the lower connecting plate are connected by bolts and nuts, a compression spring is sleeved outside the bolt, and the compression spring is clamped between the upper connecting plate and the lower connecting plate.
[0011] Preferably, a vibration motor is fixedly arranged outside the secondary mixing bin, and the vibration direction of the vibration motor is set vertically.
[0012] Preferably, the flexible member includes soft leather.
[0013] Preferably, the impact plate is movably connected to the primary mixing bin, and a spring is clamped between the lower surface of the impact plate and the inner wall of the primary mixing bin.
[0014] The advantages and beneficial effects of the present utility model are as follows: The front-of-furnace bin structure for reducing sulfur dioxide production of the present utility model is reasonable. By arranging a primary mixing bin in front of the front-of-furnace bin body, calcium carbonate and coal are premixed and temporarily stored in the front-of-furnace bin body. Therefore, the fuel entering the combustion furnace from the front-of-furnace bin body is a mixture of coal and calcium carbonate, which improves the reaction effect and the desulfurization effect. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 is a schematic structural diagram of an embodiment of the front-of-furnace bin for reducing sulfur dioxide production of the present utility model;
[0016] Figure 2 is Figure 1 an explosion schematic diagram of;
[0017] Figure 3 is Figure 1 a sectional view of;
[0018] Figure 4 is a schematic structural diagram of the impact plate;
[0019] In the figure: 1, front-of-furnace bin body; 2, primary mixing bin; 21, calcium carbonate inlet; 22, coal inlet; 23, upper connecting plate; 3, impact plate; 31, spring; 4, secondary mixing bin; 41, lower connecting plate; 5, flexible member; 61, bolt; 62, nut; 63, compression spring; 7, vibration motor. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0020] The specific implementation manners of the present utility model will be further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solutions of the present utility model, and cannot be used to limit the protection scope of the present utility model.
[0021] "Upper" and "lower" are referenced based on the normal use state of the bin, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present utility model. Embodiment
[0022] As Figures 1-4 shown, the front furnace bin for reducing sulfur dioxide generation in the embodiment includes a front furnace bin body 1 and a primary mixing bin 2 connected to the front furnace bin body 1. The primary mixing bin 2 is provided with a calcium carbonate inlet 21 and a coal inlet 22. An impact plate 3 is arranged in the primary mixing bin 2. The impact plate 3 is arranged below the calcium carbonate inlet 21 and the coal inlet 22, and a plurality of impact plates 3 are arranged along the circumferential and axial directions of the primary mixing bin 2.
[0023] Through such a design, calcium carbonate and coal are mixed before entering the front furnace bin body 1, and the mixture entering the combustion furnace improves the reaction effect, thereby improving the desulfurization effect and reducing the generation of sulfur dioxide.
[0024] Further, a secondary mixing bin 4 is arranged between the primary mixing bin 2 and the front furnace bin body 1. The primary mixing bin 2, the secondary mixing bin 4, and the front furnace bin body 1 are communicated with each other in sequence from top to bottom. The secondary mixing bin 4 is used to assist in fully mixing calcium carbonate and coal.
[0025] Through such a design, a plurality of impact plates 3 can preliminarily mix calcium carbonate and coal, and the secondary mixing bin 4 makes the mixing of calcium carbonate and coal more sufficient, so that the reaction effect of the mixture entering the combustion furnace is better.
[0026] Specifically, the front furnace bin body 1 and the primary mixing bin 2 are both fixedly arranged, the secondary mixing bin 4 is vibrated, the feed inlet of the secondary mixing bin 4 is movably connected to the discharge outlet of the primary mixing bin 2, and the discharge outlet of the secondary mixing bin 4 is movably connected to the feed inlet of the front furnace bin body 1.
[0027] Through such a design, the purpose of vibrating and mixing the mixture in the secondary mixing bin 4 is achieved.
[0028] Specifically, flexible members 5 are hermetically and fixedly connected between the feed inlet of the secondary mixing bin 4 and the discharge outlet of the primary mixing bin 2 and between the discharge outlet of the secondary mixing bin 4 and the feed inlet of the front furnace bin body 1.
[0029] Through such a design, the vibration of the secondary mixing bin 4 is prevented from interfering with the primary mixing bin 2 and the main body 1 of the bin in front of the furnace, and at the same time, the leakage of materials is also avoided.
[0030] Specifically, an upper connecting plate 23 is fixedly arranged on the primary mixing bin 2, a lower connecting plate 41 is fixedly arranged on the secondary mixing bin 4, the upper connecting plate 23 and the lower connecting plate 41 are connected by bolts 61 and nuts 62, and a compression spring 63 is sleeved outside the bolt 61, and the compression spring 63 is clamped between the upper connecting plate 23 and the lower connecting plate 41.
[0031] Through such a design, the secondary mixing bin 4 is suspended by the primary mixing bin 2, and the compression spring 63 can play a certain buffering role in the vibration of the secondary mixing bin 4.
[0032] Specifically, a vibration motor 7 is fixedly arranged outside the secondary mixing bin 4, and the vibration direction of the vibration motor 7 is set vertically.
[0033] Through such a design, the purpose of vibrating the secondary mixing bin 4 is achieved.
[0034] Specifically, the flexible member 5 includes soft leather.
[0035] Through such a design, compared with the flexible member 5 made of plastics and other materials, the soft leather is not easily damaged and has a longer service life.
[0036] Furthermore, the impact plate 3 is movably connected to the primary mixing bin 2, and a spring 31 is clamped between the lower surface of the impact plate 3 and the inner wall of the primary mixing bin 2.
[0037] Through such a design, the impact plate 3 is vibrated, and the mixing degree during the preliminary mixing of calcium carbonate and coal can be improved.
[0038] The above is only the preferred embodiment of the present invention. It should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.
Claims
1. A front furnace bin for reducing sulfur dioxide production, characterized in that, It includes a front furnace bin body (1) and a primary mixing bin (2) communicated with the front furnace bin body (1). The primary mixing bin (2) is provided with a calcium carbonate inlet (21) and a coal inlet (22). An impact plate (3) is arranged in the primary mixing bin (2). The impact plate (3) is arranged below the calcium carbonate inlet (21) and the coal inlet (22). A plurality of impact plates (3) are arranged along the circumferential and axial directions of the primary mixing bin (2).
2. The front furnace bin for reducing sulfur dioxide generation according to claim 1, characterized in that, A secondary mixing bin (4) is arranged between the primary mixing bin (2) and the front furnace bin body (1). The primary mixing bin (2), the secondary mixing bin (4), and the front furnace bin body (1) are communicated in sequence from top to bottom. The secondary mixing bin (4) is used to assist in fully mixing calcium carbonate and coal.
3. The pre-furnace bin for reducing sulfur dioxide generation according to claim 2, wherein The front furnace bin body (1) and the primary mixing bin (2) are both fixedly arranged. The secondary mixing bin (4) is arranged to vibrate. The feed inlet of the secondary mixing bin (4) is movably connected to the discharge outlet of the primary mixing bin (2). The discharge outlet of the secondary mixing bin (4) is movably connected to the feed inlet of the front furnace bin body (1).
4. The pre-furnace bin for reducing sulfur dioxide generation according to claim 3, characterized in that, Flexible members (5) are hermetically and fixedly connected between the feed inlet of the secondary mixing bin (4) and the discharge outlet of the primary mixing bin (2), and between the discharge outlet of the secondary mixing bin (4) and the feed inlet of the front furnace bin body (1).
5. The pre-furnace bin for reducing sulfur dioxide generation according to claim 4, characterized in that The primary mixing bin (2) is fixedly provided with an upper connecting plate (23). The secondary mixing bin (4) is fixedly provided with a lower connecting plate (41). The upper connecting plate (23) and the lower connecting plate (41) are connected by bolts (61) and nuts (62). A compression spring (63) is sleeved outside the bolt (61). The compression spring (63) is clamped between the upper connecting plate (23) and the lower connecting plate (41).
6. The pre-furnace bin for reducing sulfur dioxide generation according to claim 5, characterized in that, A vibration motor (7) is fixedly arranged outside the secondary mixing bin (4). The vibration direction of the vibration motor (7) is set vertically up and down.
7. The pre-furnace bin for reducing sulfur dioxide generation according to claim 4, wherein The flexible member (5) includes soft leather.
8. The front furnace bin for reducing sulfur dioxide generation according to claim 1, characterized in that, The impact plate (3) is movably connected to the primary mixing bin (2). A spring (31) is clamped between the lower surface of the impact plate (3) and the inner wall of the primary mixing bin (2).