Dry desulfurization efficient spraying device

Abstract

The utility model discloses a high-efficiency spraying device for dry desulfurization. The high-efficiency spraying device for dry desulfurization comprises a spraying main pipe and a spraying distance enhancing device, a plurality of injection orifices are formed in the two sides of the main injection pipe, and each injection orifice is provided with an injection distance enhancing device, so that the main injection pipe and the plurality of injection distance enhancing devices form a rake type structure; the jet distance enhancing device is made of a semicircular pipe, angle steel or channel steel; the rake type structures are evenly distributed and installed in the width direction of the vertical flue, so that dry powder airflow sprayed out of the spraying openings evenly covers the cross section of the whole flue. According to the efficient injection device for dry desulfurization, dry powder airflow injected from the nozzle forms turbulent flows in different directions along the injection orifice under the combined action of turbulent flows formed by the injection distance enhancing device, the guide plate and flue gas in the flue, so that the effect of enhancing mixing is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of flue gas desulfurization, and particularly relates to a high-efficiency injection device for dry desulfurization. Background Art

[0002] The flue gas SDS dry desulfurization device is an important technical equipment for controlling SO2 emissions. With the increasing emphasis on environmental protection, the ultra-low emission requirements have put forward higher requirements for the advancement of current flue gas desulfurization technologies. Dry desulfurization must rely on more advanced powder injection mixing technologies. By improving the injection system, the uniformity of flue gas mixing is enhanced, and the deviation of the molar ratio distribution of desulfurization powder / SO2 in the flue gas is controlled to a minimum to improve the desulfurization efficiency and meet the ultra-low emission requirements.

[0003] Currently, the typical ejector structures that are widely used mainly include the large nozzle type and the multi-nozzle type. The baffle mixer arranged obliquely against the wind in the flue cross-section improves the mixing effect by directly blocking the flue gas to form eddies on the leeward side of the baffle. The mixing effect in the local area is strong, but it cannot cover the entire flue cross-section, there are mixing blind spots, which weakens the overall mixing performance, and the resistance is large. The vane mixer is a mixing device that installs one or two layers of vanes bent at a certain angle in the flue cross-section to form a covering mixing area in the flue projection cross-section. When the flue gas passes through the vane mixer, turbulence and swirl are formed under the guiding action of the vanes to achieve the mixing effect. Compared with the baffle mixer, the traditional vane mixer technology has an obvious mixing effect. However, for the current ultra-low emission requirements and high-efficiency dry desulfurization under low SO2 conditions, the traditional vane mixing technology still has difficulty meeting the more stringent requirements for flue gas uniformity distribution.

[0004] The technology of this application proposes a mixing device with a new structure for the higher uniformity mixing requirements of current dry desulfurization ultra-low emissions. Content of the Utility Model

[0005] The purpose of the utility model is to disclose a high-efficiency injection device for dry desulfurization in order to overcome the problems of the prior art. The device of the utility model solves the problem of uniform distribution of flue gas in dry desulfurization through advanced mixing technologies, meets the requirements of current ultra-low emissions for the deviation of flue gas uniformity distribution, improves the utilization rate of desulfurization absorbent, improves the desulfurization efficiency, and finally realizes ultra-low emissions of SO2.

[0006] The purpose of the utility model is realized by the following technical solutions:

[0007] A high-efficiency injection device for dry desulfurization, the high-efficiency injection device for dry desulfurization includes: an injection main pipe and a device for enhancing the injection distance;

[0008] On both sides of the injection main pipe, a number of injection ports are provided, and each injection port is respectively provided with a device for enhancing the injection distance, so that a rake structure is formed by the injection main pipe and a number of devices for enhancing the injection distance;

[0009] The device for enhancing the injection distance is made of a semi-circular pipe, angle steel or channel steel;

[0010] Each rake structure is evenly installed along the width direction of the vertical flue, so that the dry powder gas flow ejected from the injection port evenly covers the cross-section of the entire flue.

[0011] According to a preferred embodiment, a blockage discharge port is provided at the bottom end of the injection main pipe for discharging the blocked materials in the injection main pipe.

[0012] According to a preferred embodiment, anti-blocking holes are provided on the side wall of the injection main pipe close to the blockage discharge port.

[0013] According to a preferred embodiment, the blockage discharge port, the injection port and the anti-blocking holes are opened by mechanical processing.

[0014] According to a preferred embodiment, the device for enhancing the injection distance is installed on the vertical leeward side of the injection port.

[0015] According to a preferred embodiment, a flow guide plate is arranged on the surface of the device for enhancing the injection distance.

[0016] According to a preferred embodiment, the flow guide plate is installed on the vertical leeward side of the injection port.

[0017] According to a preferred embodiment, the device for enhancing the injection distance and the flow guide plate are welded together.

[0018] According to a preferred embodiment, the injection main pipe and the device for enhancing the injection distance are welded together.

[0019] The main solution of the present invention and its various further alternative solutions described above can be freely combined to form multiple solutions, all of which are the solutions that can be adopted and claimed by the present invention. Those skilled in the art can understand that there are various combinations according to the prior art and common general knowledge after understanding the solution of the present invention, all of which are the technical solutions to be protected by the present invention and will not be enumerated here.

[0020] The beneficial effects of the present invention:

[0021] The dry desulfurization high-efficiency injection device of the present invention ensures full coverage of the mixing area of the flue cross-section by adding a device for enhancing the injection distance and a flow guide plate, thereby strengthening the mixing effect of the entire flue cross-section, avoiding dead zones and blind spots, and providing more ideal flow field conditions for high-efficiency dry desulfurization. Solve the problem of blind spots in the mixing area and strengthen the mixing effect.

[0022] The high-efficiency dry desulfurization injection device of the utility model effectively reduces the probability of blockage of the injection main pipe by adding anti-blocking holes at the lower part. And a blockage discharge port is added at the bottom of the injection main pipe, so that even if the injection main pipe has a blockage problem, it can be quickly dredged. The problem of easy blockage of conventional dry powder injection devices is solved.

[0023] In the high-efficiency dry desulfurization injection device of the utility model, the dry powder gas flow sprayed from the nozzle follows the injection port and forms turbulent flows in different directions under the combined action of the turbulent flow formed by the enhanced injection distance device, the guide vane and the flue gas in the flue, achieving the effect of strengthening mixing. Description of the Drawings

[0024] Figure 1 is the front view of the high-efficiency dry desulfurization injection device of the utility model;

[0025] Figure 2 is the left view of the high-efficiency dry desulfurization injection device of the utility model;

[0026] Wherein, 1 - flue, 2 - injection main pipe, 3 - blockage discharge port, 4 - enhanced injection distance device, 5 - guide vane, 6 - injection port, 7 - anti-blocking hole. Detailed Embodiments

[0027] The following specific examples illustrate the embodiments of the utility model. Those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in this specification. The utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the utility model. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.

[0028] It should be noted that: similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0029] In the description of the utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed during use. It is only for the convenience of describing the 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 understood as a limitation of the utility model. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance.

[0030] In addition, terms such as "horizontal", "vertical", "hanging", etc. do not require the components to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0031] In the description of the present utility model, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0032] In addition, it should be pointed out in the present utility model that in the present utility model, if the specifically involved structure, connection relationship, position relationship, power source relationship, etc. are not specifically written, then the structure, connection relationship, position relationship, power source relationship, etc. involved in the present utility model are all known to those skilled in the art on the basis of the prior art without creative labor.

[0033] Embodiment 1

[0034] Reference Figure 1 As shown in the figure, a high-efficiency dry desulfurization injection device is shown in the figure. The high-efficiency dry desulfurization injection device includes: an injection main pipe 2 and an enhanced injection distance device 4.

[0035] Preferably, a plurality of injection ports 6 are provided on both sides of the injection main pipe 2, and each injection port 6 is respectively provided with an enhanced injection distance device 4, so as to form a rake structure by the injection main pipe 2 and a plurality of enhanced injection distance devices 4; each rake structure is evenly installed along the width direction of the vertical flue 1, so that the dry powder airflow ejected from the injection port 6 evenly covers the cross section of the entire flue 1.

[0036] Preferably, the enhanced injection distance device 4 is made of a semi-circular pipe, angle steel or channel steel. The enhanced injection distance device 4 is installed on the vertical leeward side of the injection port 6. The injection main pipe 2 and the enhanced injection distance device 4 are welded together.

[0037] Preferably, a flow guide plate 5 is arranged on the surface of the enhanced injection distance device 4. The flow guide plate 5 is installed on the vertical leeward side of the injection port 6. The enhanced injection distance device 4 and the flow guide plate 5 are welded together.

[0038] Preferably, the optimal length and width of the enhanced injection distance device 4 are determined by means of flow field simulation, and the optimal installation position and installation angle of the flow guide plate 5 are determined by means of flow field simulation.

[0039] Determine the optimal geometric shape and angle of the blades of the mixing device through fluid model tests, so that a jet airflow with a certain flow rate can generate strong turbulence under its action, and complete sufficient mixing in the flue gas cross-section. Solve the problem that the insufficient mixing intensity leads to too long required mixing distance. Determine the optimal geometric shape and size of the static flow guiding device under the condition of meeting the expected mixing effect through flow field simulation tests, ensure that its operating resistance is minimized and it is easy to manufacture and install. Solve the problem that the operating resistance of the conventional mixing device is too large.

[0040] Preferably, a plug-discharging port 3 is provided at the bottom end of the injection main pipe 2 for discharging the blocked materials in the injection main pipe 2. An anti-blocking hole 7 is provided on the side wall of the injection main pipe 2 close to the plug-discharging port 3.

[0041] By increasing the lower anti-blocking holes, the probability of blockage of the injection main pipe is effectively reduced. And a plug-discharging port is added at the bottom of the injection main pipe. Even if the injection main pipe has a blockage problem, it can be quickly dredged. Solve the problem that the conventional dry powder injection device is easy to be blocked.

[0042] Preferably, the plug-discharging port 3, the injection port 6, and the anti-blocking hole 7 are opened by mechanical processing.

[0043] In the dry desulfurization high-efficiency injection device of the present utility model, the dry powder airflow sprayed from the nozzle follows the injection port 6 and forms turbulence in different directions under the combined action of the turbulence formed by the enhanced injection distance device 4, the deflector 5, and the flue gas in the flue 1, achieving the effect of strengthening mixing.

[0044] The above are only the preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present utility model shall be included in the protection scope of the present utility model.

Claims

1. A high-efficiency spraying device for dry desulfurization, characterized in that: The dry desulfurization high-efficiency injection device comprises: an injection main pipe (2) and an injection distance enhancement device (4); A plurality of injection ports (6) are provided on both sides of the injection main pipe (2), and each injection port (6) is provided with an injection distance enhancement device (4), so that a rake-type structure is formed by the injection main pipe (2) and the plurality of injection distance enhancement devices (4); The spray distance enhancement device (4) is made of a semicircular tube, angle steel or channel steel; The rake structures are evenly installed along the width direction of the vertical flue (1), so that the dry powder airflow ejected from the injection port (6) evenly covers the entire cross section of the flue (1).

2. The high-efficiency spraying device for dry desulfurization according to claim 1, characterized in that: The bottom end of the injection main pipe (2) is provided with a blockage discharge port (3) for discharging materials blocked in the injection main pipe (2).

3. The high-efficiency spraying device for dry desulfurization according to claim 2, characterized in that: An anti-blocking hole (7) is provided on the side wall of the injection main pipe (2) close to the blockage removal port (3).

4. The high-efficiency spraying device for dry desulfurization according to claim 3, characterized in that: The blockage removal port (3), the injection port (6) and the blockage prevention hole (7) are opened by mechanical processing.

5. The high-efficiency spraying device for dry desulfurization according to claim 1, characterized in that: The device (4) for enhancing the spray distance is installed on the vertical leeward side of the spray port (6).

6. The high-efficiency spraying device for dry desulfurization according to claim 1, characterized in that: A guide plate (5) is arranged on the surface of the device (4) for enhancing the spray distance.

7. The high-efficiency spraying device for dry desulfurization according to claim 6, characterized in that: The guide plate (5) is installed on the vertical leeward side of the injection port (6).

8. The high-efficiency spraying device for dry desulfurization according to claim 6, characterized in that: The spray distance enhancement device (4) and the guide plate (5) are connected by welding.

9. The high-efficiency spraying device for dry desulfurization according to claim 1, characterized in that: The injection main pipe (2) and the injection distance enhancement device (4) are connected by welding.

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