Dry type desulfurization device of fixed bed

Abstract

The utility model discloses a dry type desulfurization device of a fixed bed, which comprises a shell, a partition plate and a stirring structure, the partition plate is vertically arranged in the shell, and the partition plate divides an inner cavity of the shell into a smoke inlet bin, a smoke outlet bin and a storage bin which are not communicated with one another; a smoke inlet header pipe and a smoke outlet header pipe which are communicated with the smoke inlet bin and the smoke outlet bin are arranged on the side wall of the shell, and a feeding pipe communicated with the storage bin is arranged at the top of the shell; a plurality of through holes are formed in the partition plate; the stirring structure is arranged in the storage bin and used for stirring the desulfurizing agent in the storage bin. The dry desulfurization device of the fixed bed can fully utilize all desulfurizers in the reactor, so that the waste of the desulfurizers is prevented, and meanwhile, the desulfurization effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of flue gas desulfurization, in particular to a fixed bed dry desulfurization device. Background Art

[0002] The national standards for air pollution control are becoming more and more stringent, and the coverage is becoming wider and wider. The desulfurization and denitrification control has been extended from the power industry to the steel and other industries. Due to the different characteristics of flue gas and the generation mechanism of pollutants, the control technologies used are very different. In particular, steel enterprises have become the focus of current atmospheric environmental governance, with many emission sources, complex flue gas components, and poor site conditions. This requires the original desulfurization and denitrification technologies to be reformed or updated, so many advanced flue gas treatment technologies have also emerged.

[0003] Common desulfurization methods include wet desulfurization, semi-dry desulfurization and dry desulfurization. Wet desulfurization has high desulfurization efficiency and is currently the most widely used. However, due to the low temperature and high water content of the outlet flue gas, the white smoke phenomenon of the exhaust flue gas is serious, which has become the main factor restricting the development of wet desulfurization. In addition, the system is complex, the equipment is large, the operation and maintenance workload is large, and the area occupied is large. Semi-dry desulfurization has a wide range of applications, high outlet flue gas temperature, and much less white smoke phenomenon, especially in some occasions where the SO2 concentration is not very high.

[0004] Fixed bed reactor is the main equipment in the flue gas dry desulfurization system. Usually multiple fixed bed reactors are used in parallel. Figure 3 As shown. The flue gas enters the material layer from the main flue gas inlet through the reactor inlet, and the flue gas passes through multiple layers of material from bottom to top. The SO2 in the flue gas reacts with the desulfurizer and is removed. The flue gas after the reaction passes through the material layer and enters the main flue gas outlet from the upper outlet of the reactor, thus completing the flue gas desulfurization process.

[0005] However, the existing fixed bed reactor has the following problems: Since the desulfurizer in the reactor is in a static state, when the flue gas enters the material layer from the reactor inlet, it is bound to contact the desulfurizer at the near end, and then sequentially passes through the desulfurizer at the far end. As time goes by, the consumption rate of the desulfurizer at the near end is bound to be greater than that of the desulfurizer at the far end. When the sulfur content of the outlet flue gas increases and the filler needs to be replaced, the consumption of the desulfurizer at the near end is much higher than that at the far end. If all the desulfurizers are replaced, some of the desulfurizers that have not fully reacted will inevitably be directly discharged, resulting in waste. Utility Model Content

[0006] In view of the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a fixed-bed dry desulfurization device, which can fully utilize all the desulfurizers in the reactor to prevent the waste of the desulfurizers and improve the desulfurization effect.

[0007] In order to achieve the above object, the utility model is implemented through the following technical scheme: a fixed bed dry desulfurization device, comprising:

[0008] a partition plate, the partition plate being vertically arranged in the shell, the partition plate dividing the inner cavity of the shell into a smoke inlet bin, a smoke outlet bin and a material storage bin which are not connected to each other; a smoke inlet main pipe and a smoke outlet main pipe connected to the smoke inlet bin and the smoke outlet bin are arranged on the side wall of the shell, and a feed pipe connected to the material storage bin is arranged on the top of the shell; a plurality of through holes are arranged on the partition plate; and

[0009] The stirring structure is arranged in the storage bin and is used for stirring the desulfurizer in the storage bin.

[0010] Furthermore, the stirring structure includes a rotating shaft, fan blades, a central shaft and stirring blades. The rotating shaft is transversely and rotatably arranged on the dividing plate. There are multiple fan blades, and the multiple fan blades are circumferentially spaced on the rotating shaft and face the smoke inlet main pipe. The central shaft is transversely and rotatably arranged in the storage bin and connected to the rotating shaft. The rotating shaft can drive the central shaft to rotate, and multiple stirring blades are circumferentially spaced on the central shaft.

[0011] Furthermore, the stirring structure also includes an acceleration component, which is connected between the rotating shaft and the central shaft, and the rotating shaft drives the central shaft to rotate through the acceleration component.

[0012] Furthermore, the acceleration assembly includes a driving gear and a driven gear, the driving gear is sleeved on the rotating shaft, the driven gear is sleeved on the central shaft and meshes with the driving gear, and the transmission ratio between the driving gear and the driven gear is greater than 1.

[0013] Furthermore, the mouth of the feed pipe is covered with a cover plate, and a plurality of conical guide cylinders are arranged on the cover plate. The large end of the guide cylinder is connected to the feed pipe, and the small end of the guide cylinder faces the dividing plate. There are multiple stirring structures, each of which is arranged in a one-to-one correspondence with the guide cylinder, and the fan blade is facing the port of the small end of the guide cylinder.

[0014] Furthermore, the peripheral arc chamfer of the stirring blade

[0015] Beneficial effects of the utility model:

[0016] When the above-mentioned fixed bed dry desulfurization device is in use, the desulfurizer is added to the storage bin through the feed pipe, and then the flue gas is introduced into the smoke inlet bin through the smoke inlet main pipe. The smoke enters the smoke inlet bin and then enters the storage bin through the through hole on the dividing plate 200. After being treated by the desulfurizer in the storage bin, it flows into the smoke outlet bin 120 and finally flows out from the smoke outlet main pipe.

[0017] By using the above-mentioned fixed bed dry desulfurization device, during use, the desulfurizer in the storage bin can be continuously stirred by the stirring structure 300, so that the position of the desulfurizer in the storage bin can be continuously changed, thereby preventing the desulfurizer near the smoke inlet end from being consumed faster than the desulfurizer at the smoke outlet end, thereby reducing the chance of desulfurizer being wasted. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific implementation of the utility model, the following will briefly introduce the drawings required for use in the specific implementation. In all the drawings, each element or part is not necessarily drawn according to the actual scale.

[0019] Figure 1 A schematic diagram of a fixed bed dry desulfurization device provided in one embodiment of the utility model;

[0020] Figure 2 for Figure 1 The local schematic diagram of the A in the middle;

[0021] Figure 3 It is a schematic diagram of a conventional fixed bed dry desulfurization device;

[0022] Reference numerals:

[0023] 100, outer shell; 110, smoke inlet bin; 120, smoke outlet bin; 130, storage bin; 140, smoke inlet main pipe; 150, smoke outlet main pipe; 160, feed pipe; 200, partition plate; 300, stirring structure; 310, rotating shaft; 320, fan blade; 330, central shaft; 340, stirring blade; 350, acceleration component; 351, driving gear; 352, driven gear; 400, cover plate; 500, guide tube. DETAILED DESCRIPTION

[0024] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0025] See also Figure 1 to Figure 2 The utility model provides a fixed bed dry desulfurization device, including a shell 100, a partition plate 200 and a stirring structure 300.

[0026] Specifically, the partition plate 200 is vertically arranged in the housing 100, and the partition plate 200 divides the inner cavity of the housing 100 into a smoke inlet bin 110, a smoke outlet bin 120 and a material storage bin 130 which are not connected to each other. The side wall of the housing 100 is provided with a smoke inlet main pipe 140 and a smoke outlet main pipe 150 which are connected to the smoke inlet bin 110 and the smoke outlet bin 120. The top of the housing 100 is provided with a feed pipe 160 which is connected to the material storage bin 130. A plurality of through holes are arranged on the partition plate 200; the stirring structure 300 is arranged in the material storage bin 130, and is used to stir the desulfurizer in the material storage bin 130.

[0027] When in use, the desulfurizer is added to the storage bin 130 through the feed pipe 160, and then the smoke is introduced into the smoke inlet bin 110 through the smoke inlet main pipe 140. The smoke enters the smoke inlet bin 110 and then enters the storage bin 130 through the through holes on the dividing plate 200. After being treated by the desulfurizer in the storage bin 130, the smoke flows into the smoke outlet bin 120 and finally flows out from the smoke outlet main pipe 150.

[0028] By using the above-mentioned fixed bed dry desulfurization device, during use, the desulfurizer in the storage bin 130 can be continuously stirred by the stirring structure 300, so that the position of the desulfurizer in the storage bin 130 can be continuously changed, thereby preventing the desulfurizer near the smoke inlet end from being consumed faster than the desulfurizer at the smoke outlet end, thereby reducing the chance of desulfurizer being wasted.

[0029] Specifically, the stirring structure 300 includes a rotating shaft 310, a fan blade 320, a central shaft 330 and a stirring blade 340. The rotating shaft 310 is rotatably arranged on the dividing plate 200 in a horizontal direction, and there are a plurality of fan blades 320, and the plurality of fan blades 320 are arranged on the rotating shaft 310 at intervals in the circumferential direction and face the smoke inlet main pipe 140. The central shaft 330 is rotatably arranged in the storage bin 130 in a horizontal direction and connected to the rotating shaft 310. The rotating shaft 310 can drive the central shaft 330 to rotate, and a plurality of stirring blades 340 are arranged on the central shaft 330 at intervals in the circumferential direction.

[0030] In a specific implementation, the arc around the stirring blade 340 may be chamfered.

[0031] In this way, no additional power source is required. When smoke enters the smoke inlet bin 110, the fan blades 320 can be driven to rotate, thereby driving the rotating shaft 310 to rotate, and then driving the central shaft 330 to rotate, thereby driving the stirring rod to stir.

[0032] As a preferred embodiment, the stirring structure 300 further includes an acceleration component 350 . The acceleration component 350 is connected between the rotating shaft 310 and the central shaft 330 . The rotating shaft 310 drives the central shaft 330 to rotate through the acceleration component 350 .

[0033] Specifically, the acceleration assembly 350 includes a driving gear 351 and a driven gear 352. The driving gear 351 is sleeved on the rotating shaft 310, and the driven gear 352 is sleeved on the central shaft 330 and meshes with the driving gear 351. The transmission ratio between the driving gear 351 and the driven gear 352 is greater than 1.

[0034] When the rotating shaft 310 rotates, since the transmission ratio between the driving gear 351 and the driven gear 352 is greater than 1, the central shaft 330 can be driven to rotate faster, thereby achieving the effect of acceleration.

[0035] Of course, in other embodiments, the central shaft 330 and the rotating shaft 310 may be coaxially arranged, and the central shaft 330 may be directly driven to rotate by the rotating shaft 310 . In this case, the rotation speeds of the central shaft 330 and the rotating shaft 310 are consistent.

[0036] As another preferred embodiment, the mouth of the feed pipe 160 is covered with a cover plate 400, and a plurality of tapered guide cylinders 500 are arranged on the cover plate 400. The large end of the guide cylinder 500 is connected to the feed pipe 160, and the small end of the guide cylinder 500 faces the partition plate 200. There are a plurality of stirring structures 300, each stirring structure 300 is arranged in a one-to-one correspondence with the guide cylinder 500, and the stirring structure 300 is directly opposite to the port of the small end of the guide cylinder 500.

[0037] When the flue gas enters from the smoke inlet main pipe 140, it is divided into multiple streams through the conical guide tube 500, and then enters the smoke inlet bin 110 from the small end of the guide tube 500. At this time, the flow rate of the flue gas becomes faster. Since the fan blade 320 is facing the port at the small end of the guide tube 500, the effect on the fan blade 320 can be increased, thereby increasing the rotation speed of the fan blade 320, and further improving the stirring effect on the desulfurizer.

[0038] The usage of the above fixed bed dry desulfurization device is as follows:

[0039] When in use, the desulfurizer is added to the storage bin 130 through the feed pipe 160. When the flue gas enters from the smoke inlet main pipe 140, it is divided into multiple flue gases through the conical guide tube 500 and enters the smoke inlet bin 110 from the small end of the guide tube 500. When the smoke gas flows out from the small end of the guide tube 500, the fan blade 320 can be driven to rotate, thereby driving the stirring rod to stir the desulfurizer in the storage bin 130. After the smoke enters the storage bin 130, it is treated with the desulfurizer in the storage bin 130 and then flows into the smoke outlet bin 120, and finally flows out from the smoke outlet main pipe 150.

[0040] By using the above-mentioned fixed bed dry desulfurization device, during use, the desulfurizer in the storage bin 130 can be continuously stirred by the stirring structure 300, so that the position of the desulfurizer in the storage bin 130 can be continuously changed, thereby preventing the consumption rate of the desulfurizer close to the smoke inlet end from being greater than the desulfurizer at the original smoke inlet end, thereby reducing the waste of desulfurizer.

[0041] In addition, the stirring structure 300 of the device does not require an additional power source, thereby achieving the purpose of environmental protection and energy saving.

[0042] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. A fixed bed dry desulfurization device, characterized in that: include: shell; a partition plate, the partition plate being vertically arranged in the shell, the partition plate dividing the inner cavity of the shell into a smoke inlet bin, a smoke outlet bin and a material storage bin which are not connected to each other; a smoke inlet main pipe and a smoke outlet main pipe connected to the smoke inlet bin and the smoke outlet bin are arranged on the side wall of the shell, and a feed pipe connected to the material storage bin is arranged on the top of the shell; a plurality of through holes are arranged on the partition plate; and The stirring structure is arranged in the storage bin and is used for stirring the desulfurizer in the storage bin.

2. The fixed bed dry desulfurization device according to claim 1, characterized in that: The stirring structure includes a rotating shaft, fan blades, a central shaft and stirring blades. The rotating shaft is transversely and rotatably arranged on the dividing plate. There are multiple fan blades, and the multiple fan blades are circumferentially spaced on the rotating shaft and face the smoke inlet main pipe. The central shaft is transversely and rotatably arranged in the storage bin and connected to the rotating shaft. The rotating shaft can drive the central shaft to rotate, and multiple stirring blades are circumferentially spaced on the central shaft.

3. The fixed bed dry desulfurization device according to claim 2, characterized in that: The mouth of the feed pipe is covered with a cover plate, and a plurality of conical guide cylinders are arranged on the cover plate. The large end of the guide cylinder is connected to the feed pipe, and the small end of the guide cylinder faces the dividing plate. There are multiple stirring structures, each of which is arranged in a one-to-one correspondence with the guide cylinder, and the fan blade is facing the port of the small end of the guide cylinder.

4. The fixed bed dry desulfurization device according to claim 2, characterized in that: The periphery of the stirring blade is chamfered.

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