Desulfurization spray gun

Abstract

The utility model discloses a desulfurization spray gun, and belongs to the technical field of environmental protection equipment. The desulfurization spray gun comprises a shell, a feeding pipeline and a plurality of blades, the plurality of annularly distributed blades are arranged at the end part of the gas flow channel formed between the inner side surface of the shell and the inner side surface of the feeding pipeline, so that high-speed gas flow introduced from the gas inlet of the shell circulates in the gas flow channel, and then forms strong rotational gas flow under the guide action of the plurality of rotational flow blades. The desulfurizing agent guided in from the feeding port of the feeding pipeline passes through the feeding pipeline and then is sprayed into the area where the rotational flow air flow is located from the discharging port, the desulfurizing agent and the rotational flow air flow are basically sprayed out on the same cross section, under the strong centrifugal effect of the rotational flow air flow, the desulfurizing agent is rapidly diffused in a conical shape, the capacity of the desulfurizing agent to be diffused all around is remarkably improved, and the desulfurizing effect of the desulfurizing agent is improved. And sufficient and uniform mixing of the desulfurizer and the flue gas is ensured, so that the desulfurization spray gun is ensured to have a relatively good removal effect on harmful substances in the flue gas.

Description

Technical Field

[0001] This application relates to the technical field of environmental protection equipment, and particularly to a desulfurization spray gun. Background Art

[0002] With the development of industry and the improvement of people's living standards, the demand for environmental quality is also increasing continuously. Sulfur dioxide (SO2) in coal-fired flue gas has become the main cause of air pollution, and reducing sulfur dioxide pollution is the top priority in current air environment governance. Many flue gas desulfurization processes have been widely applied in industry, and they also have important practical significance for the treatment of tail gases from various boilers and incinerators.

[0003] The flue duct injection desulfurization process is a method of desulfurizing flue gas by spraying desulfurizer particles into the flue duct through a spray gun, which can achieve the removal of acidic gases such as SO2, SO3, and HCl in the flue duct. For the flue duct injection desulfurization process, its core equipment is the desulfurizer spray gun.

[0004] However, the current desulfurizer spray gun has a poor spraying and diffusion effect on desulfurizer particles. Utility Model Content

[0005] The embodiments of this application provide a desulfurization spray gun, which can solve the problem that the existing desulfurization spray gun has a poor spraying and diffusion effect on desulfurizer particles. The technical solution is as follows:

[0006] On the one hand, a desulfurization spray gun is provided, which includes:

[0007] A housing, a feed pipeline, and multiple blades;

[0008] The first end of the housing has an air inlet, and the second end of the housing has an air outlet communicating with the air inlet;

[0009] At least part of the feed pipeline is located inside the housing, and a gas flow channel is formed between the outer side wall of the feed pipeline and the inner side wall of the housing. The gas flow channel is communicated with both the air inlet and the air outlet. One end of the feed pipeline has a feed port, and the feed port is exposed at the first end of the housing. The other end of the feed pipeline has a discharge port communicating with the feed port. The discharge port is located at the air outlet and is communicated with the air outlet;

[0010] The multiple blades are located in the gas flow channel and are adjacent to the air outlet. The multiple blades are distributed around the feed pipeline. One end of the blade is fixedly connected to the outer side wall of the feed pipeline, and the other end is fixedly connected to the inner side wall of the housing.

[0011] Optionally, the housing comprises: a first tube shell and a second tube shell, the first tube shell having the air outlet, the feeding pipeline being located in the first tube shell, and the extending direction of the feeding pipeline being parallel to the extending direction of the first tube shell; one end of the second tube shell is fixedly connected to the outer side surface of the first tube shell, and the other end of the second tube shell having the air inlet;

[0012] The included angle between the extension direction of the second tube shell and the extension direction of the first tube shell is an acute angle, and the other end of the second tube shell is farther away from the air outlet than the one end of the second tube shell.

[0013] Optionally, the axis centerline of the first tube shell coincides with the axis centerline of the feeding pipeline.

[0014] Optionally, the first tube shell comprises: a first part and a second part sequentially arranged along the extension direction of the first tube shell, one end of the first part is connected to one end of the second part, and one end of the second part away from the first part has the gas outlet; the feeding pipeline comprises: a third part located in the first part, and a fourth part located in the second part, one end of the third part is connected to one end of the fourth part, and one end of the fourth part away from the third part has the discharge port;

[0015] Among them, the second part and the fourth part both have a straight state or a bent state. When the second part and the fourth part are both in the straight state, the axis line of the first part is parallel to the axis line of the second part, and the axis line of the third part is parallel to the axis line of the fourth part; when the second part and the fourth part are both in the bent state, the axis line of the first part intersects with the axis line of the second part, and the axis line of the third part intersects with the axis line of the fourth part.

[0016] Optionally, the second part and the fourth part are both tubular structures made of flexible material, so that the second part and the fourth part can be switched between the straightened state and the bent state.

[0017] Optionally, a fastening connector is provided on the outer side surface of the shell, and the fastening connector is used for detachable connection with the flue.

[0018] Optionally, the fastening connector has a connecting hole, and the desulfurization lance further comprises: a locking member, and the locking member passes through the connecting hole and is connected to the flue.

[0019] Optionally, the desulfurization spray gun further includes: an auxiliary material pipe located outside the housing, and one end of the auxiliary material pipe is connected to the feeding pipeline at the feeding port.

[0020] Optionally, the desulfurization spray gun further includes: a seal fixed at the connection position between the auxiliary material pipe and the feeding port.

[0021] Optionally, the plane where the air outlet is located is flush with the plane where the material outlet is located.

[0022] The beneficial effects brought by the technical solution provided by the embodiments of the present application at least include:

[0023] A desulfurization spray gun may include: a housing, a feeding pipeline, and a plurality of blades. The desulfurization spray gun can be installed on the flue so that the desulfurizing agent sprayed from the desulfurization spray gun can be mixed with the flue gas in the flue and undergo a chemical reaction. By arranging a plurality of annularly distributed blades at the end of the gas flow channel formed between the inner side surface of the housing and the inner side surface of the feeding pipeline, in this way, the high-speed air flow introduced from the air inlet of the housing flows in the gas flow channel, and then forms a strong swirling air flow after being guided by the plurality of swirling blades. The desulfurizing agent introduced from the feeding port of the feeding pipeline is sprayed into the area where the swirling air flow is located from the material outlet after passing through the feeding pipeline. The desulfurizing agent and the swirling air flow are ejected at substantially the same cross-section. Under the strong centrifugal action of the swirling air flow, the desulfurizing agent rapidly spreads in a conical shape, significantly improving the ability of the desulfurizing agent to spread around, ensuring the full and uniform mixing of the desulfurizing agent and the flue gas, and thus ensuring better removal effect of harmful substances in the flue gas by the desulfurization spray gun. In addition, the desulfurization spray gun in the present application does not require large structures such as a spray gun back plate and a static mixer, making the overall structure of the desulfurization spray gun simple and convenient for processing and manufacturing, and at the same time, it is convenient for installation and maintenance, so as to facilitate maintenance. Description of the Drawings

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0025] Figure 1 is a schematic structural diagram of a desulfurization spray gun provided by an embodiment of the present application;

[0026] Figure 2 is Figure 1 a cross-sectional view of the desulfurization spray gun shown;

[0027] Figure 3 is a partial structural diagram of a desulfurization spray gun provided by an embodiment of the present application;

[0028] Figure 4 is a schematic structural diagram of another desulfurization spray gun provided by an embodiment of the present application;

[0029] Figure 5 is a schematic structural diagram of yet another desulfurization spray gun provided by an embodiment of the present application;

[0030] Figure 6 is a schematic structural diagram of still another desulfurization spray gun provided by an embodiment of the present application;

[0031] Figure 7 is a schematic structural diagram of a desulfurization spray gun provided by another embodiment of the present application;

[0032] Figure 8 is a schematic connection diagram of a desulfurization spray gun and a flue provided by an embodiment of the present application;

[0033] Figure 9 is a schematic connection diagram of another desulfurization spray gun and a flue provided by an embodiment of the present application;

[0034] Figure 10 is a schematic connection diagram of yet another desulfurization spray gun and a flue provided by an embodiment of the present application.

[0035] Through the above-mentioned drawings, specific embodiments of the present application have been shown, and more detailed descriptions will be given hereinafter. These drawings and textual descriptions are not intended to limit the scope of the concept of the present application in any way, but to illustrate the concept of the present application to those skilled in the art by referring to specific embodiments. Specific Embodiments

[0036] To make the objectives, technical solutions, and advantages of the present application clearer, the following will further describe in detail the embodiments of the present application with reference to the drawings.

[0037] Please refer to Figure 1 and Figure 2 , Figure 1 is a schematic structural diagram of a desulfurization spray gun provided by an embodiment of the present application, Figure 2 is Figure 1 a cross-sectional view of the shown desulfurization spray gun. The desulfurization spray gun 000 may include: a housing 100, a feed pipeline 200, and a plurality of vanes 300.

[0038] The first end of the housing 100 in the desulfurization spray gun 000 may have an air inlet a1, and the second end of the housing 100 may have an air outlet a2 communicating with the air inlet a1.

[0039] At least a part of the feeding pipeline 200 in the desulfurization spray gun 000 can be located inside the housing 100, and a gas flow channel A can be formed between the outer sidewall of the feeding pipeline 200 and the inner sidewall of the housing 100. The gas flow channel A can communicate with both the air inlet a1 and the air outlet a2 of the housing 100. One end of the feeding pipeline 200 can have a feeding port b1, and the feeding port b1 can be exposed at the first end of the housing 100. The other end of the feeding pipeline 200 can have a discharging port b2 communicating with the feeding port b1. The discharging port b2 can be located at the air outlet a2 of the housing 100 and can communicate with the air outlet a2. By way of example, a part of the feeding pipeline 200 can be located inside the housing 100, another part of the feeding pipeline 200 can be located outside the housing 100, or the feeding pipeline 200 can be entirely located inside the housing 100. The embodiments of the present application do not make specific limitations thereto.

[0040] A plurality of vanes 300 in the desulfurization spray gun 000 can be located in the gas flow channel A and can be arranged adjacent to the air outlet a2 and the discharging port b2. The plurality of vanes 300 can be distributed around the feeding pipeline 200. One end of each vane 300 can be fixedly connected to the outer sidewall of the feeding pipeline 200, and the other end of each vane 300 can be fixedly connected to the inner sidewall of the housing 100. By way of example, the number of vanes 300 can be greater than or equal to 3 and less than or equal to 36. For example, the number of vanes 300 can preferably be greater than or equal to 6 and less than or equal to 18. In addition, the included angle range between the plane where each vane is located and the direction of the high-speed gas flow flowing towards the vane can be greater than or equal to 0 degree and less than or equal to 90 degrees. For example, the included angle range between the plane where each vane 300 is located and the direction of the high-speed gas flow flowing towards the vane 300 can be greater than or equal to 30 degrees and less than 60 degrees. Here, when the included angle between the plane where the vane 300 is located and the direction of the high-speed gas flow flowing towards the vane is 0 degree, that is, the plane where the vane 300 is located is parallel to the direction of the high-speed gas flow flowing towards the vane. It should be noted that the included angle between the plane where each vane 300 is located and the direction of the high-speed gas flow flowing towards the vane can be equal, and in the actual application process, the number of vanes 300 and the included angle between the plane where the vane 300 is located and the direction of the high-speed gas flow flowing towards the vane can be determined according to the diffusion effect of the desulfurizing agent.

[0041] In the embodiment of the present application, the desulfurization spray gun 000 can be installed on a flue (not shown in the figure), so that the desulfurizing agent sprayed from the desulfurization spray gun can be mixed with the flue gas in the flue and produce a chemical reaction. By arranging a plurality of annularly distributed vanes 300 in the gas flow channel A formed between the inner side surface of the outer shell 100 and the inner side surface of the feed pipeline 200, in this way, the high-speed air flow introduced from the air inlet a1 of the outer shell 100 flows in the gas flow channel A, and then forms a strong swirling air flow after being guided by the plurality of swirling vanes. The desulfurizing agent introduced from the feed inlet b1 of the feed pipeline 200 is sprayed into the area where the swirling air flow is located from the discharge outlet b2 after passing through the feed pipeline 200. The desulfurizing agent and the swirling air flow are ejected at substantially the same cross-section. Under the strong centrifugal action of the swirling air flow, the desulfurizing agent rapidly spreads out in a conical shape, significantly improving the ability of the desulfurizing agent to spread around, ensuring the full and uniform mixing of the desulfurizing agent and the flue gas, and further ensuring that the desulfurization spray gun has a good effect on removing harmful substances in the flue gas. In addition, the desulfurization spray gun in the present application does not need to use large structures such as a spray gun back plate and a static mixer, making the overall structure of the desulfurization spray gun simple and convenient for processing and manufacturing, and at the same time, it is convenient for installation and maintenance, so as to facilitate maintenance.

[0042] In summary, the embodiment of the present application provides a desulfurization spray gun, which may include: an outer shell, a feed pipeline, and a plurality of vanes. The desulfurization spray gun can be installed on a flue, so that the desulfurizing agent sprayed from the desulfurization spray gun can be mixed with the flue gas in the flue and produce a chemical reaction. By arranging a plurality of annularly distributed vanes at the end of the gas flow channel formed between the inner side surface of the outer shell and the inner side surface of the feed pipeline, in this way, the high-speed air flow introduced from the air inlet of the outer shell flows in the gas flow channel, and then forms a strong swirling air flow after being guided by the plurality of swirling vanes. The desulfurizing agent introduced from the feed inlet of the feed pipeline is sprayed into the area where the swirling air flow is located from the discharge outlet after passing through the feed pipeline. The desulfurizing agent and the swirling air flow are ejected at substantially the same cross-section. Under the strong centrifugal action of the swirling air flow, the desulfurizing agent rapidly spreads out in a conical shape, significantly improving the ability of the desulfurizing agent to spread around, ensuring the full and uniform mixing of the desulfurizing agent and the flue gas, and further ensuring that the desulfurization spray gun has a good effect on removing harmful substances in the flue gas. In addition, the desulfurization spray gun in the present application does not need to use large structures such as a spray gun back plate and a static mixer, making the overall structure of the desulfurization spray gun simple and convenient for processing and manufacturing, and at the same time, it is convenient for installation and maintenance, so as to facilitate maintenance.

[0043] In the present application, please refer to Figure 3 , Figure 3It is a partial structural schematic diagram of a desulfurization spray gun provided by an embodiment of the present application. The plane where the air outlet a2 of the outer shell 100 is located can be flush with the plane where the discharge outlet b2 of the feeding pipeline 200 is located. In this way, after the desulfurizing agent passes through the feeding pipeline 200, it is sprayed into the area where the swirling air flow is located from the discharge outlet b2, so that the desulfurizing agent and the swirling air flow are sprayed out at the same cross-section. Under the strong centrifugal force of the swirling air flow, the desulfurizing agent quickly spreads out in a conical shape, further significantly improving the ability of the desulfurizing agent to spread around, ensuring the full and uniform mixing of the desulfurizing agent and the flue gas, and thus ensuring that the desulfurization spray gun has a good effect on removing harmful substances in the flue gas.

[0044] Optionally, please refer to Figure 4 , Figure 4 It is a structural schematic diagram of another desulfurization spray gun provided by an embodiment of the present application. The outer shell 100 in the desulfurization spray gun 000 may include: a first pipe shell 101 and a second pipe shell 102. One end of the first pipe shell 101 may have an air outlet a2. The feeding pipeline 200 may be located inside the first pipe shell 101, and the extending direction of the feeding pipeline 200 may be parallel to the extending direction of the first pipe shell 101. One end of the second pipe shell 102 may be fixedly connected to the outer side surface of the first pipe shell 101, and the other end of the second pipe shell 102 may have an air inlet a1. Wherein, the included angle α between the extending direction of the second pipe shell 102 and the extending direction of the first pipe shell 101 may be an acute angle, and the other end of the second pipe shell 102 may be away from the air outlet a2 relative to one end of the second pipe shell 102. That is to say, the end of the second pipe shell 102 provided with the air inlet a1 is away from the air outlet a2 in the first pipe shell 101 relative to the end of the second pipe shell 102 connected to the outer side surface of the first pipe shell 101. In this case, by providing the first pipe shell 101 and the second pipe shell 102 in the outer shell 100, a gas flow channel A is formed between the inner side wall of the first pipe shell 101 and the outer side wall of the feeding pipeline 200. An air inlet is provided in the second pipe shell 102, and the included angle α between the extending direction of the first pipe shell 101 and the extending direction of the second pipe shell 102 is an acute angle. In this way, the high-speed air flow entering from the air inlet can flow obliquely downward towards the air outlet, ensuring a good flow effect of the high-speed air flow. And the high-speed air flow will not directly blow horizontally towards the feeding pipeline 200, effectively ensuring the structural stability of the feeding pipeline 200. Exemplarily, both the first pipe shell 101 and the second pipe shell 102 may be cylindrical, and the length of the first pipe shell 101 may be greater than the length of the second pipe shell 102.

[0045] In the present application, the first pipe shell 101 and the second pipe shell 102 may be respectively formed and then connected by a fixed connection method; or, the first pipe shell 101 and the second pipe shell 102 may also be integrally formed. The embodiments of the present application do not make specific limitations on this.

[0046] In the embodiments of the present application, asFigure 4 As shown, the axis line of the first casing 101 can coincide with the axis line of the feeding pipeline 200. That is to say, the feeding pipeline 200 can be located in the central area within the first casing 101, and the radial widths at various positions of the gas flow channel A formed between the outer side wall of the feeding pipeline 200 and the inner side wall of the first casing 101 are equal. In this case, by arranging the feeding pipeline 200 in the central area of the first casing 101, the high-speed air flow entering from the second casing 102 is evenly distributed within the gas flow channel A. Furthermore, these high-speed air flows form a uniform and stable swirling air flow after passing through multiple swirling vanes 300, and the desulfurization agent can be sprayed into the center of the swirling air flow, further ensuring that under the strong centrifugal force of the swirling air flow, the desulfurization agent has a good ability to diffuse around. It should be noted that the axis line of the first casing 101 and the axis line of the feeding pipeline 200 may also not coincide, such that the radial widths at various positions of the gas flow channel A formed between the outer side wall of the feeding pipeline 200 and the inner side wall of the first casing 101 are not equal, or such that the radial widths in some areas of the gas flow channel A formed between the outer side wall of the feeding pipeline 200 and the inner side wall of the first casing 101 are equal, while the radial widths in some other areas are not equal.

[0047] Optionally, please refer to Figure 4 、 Figure 5 、 Figure 6 and Figure 7 , Figure 5 is a schematic structural diagram of another desulfurization spray gun provided by an embodiment of the present application, Figure 6 is a schematic structural diagram of yet another desulfurization spray gun provided by an embodiment of the present application, Figure 7It is a structural schematic diagram of a desulfurization spray gun provided by another embodiment of the present application. The first tube shell 101 in the housing 100 may include: a first part 101a and a second part 101b arranged in sequence along the extension direction of the first tube shell 101, one end of the first part 101a may be connected to one end of the second part 101b, and the end of the second part 101b away from the first part 101a may have an outlet a2. The feeding pipeline 200 may include: a third part 201 located in the first part 101a in the first tube shell 101, and a fourth part 202 located in the second part 101b in the first tube shell 101, one end of the third part 201 may be connected to one end of the fourth part 202, and the third part 201 may be connected to the first part 101a, the end of the fourth part 202 away from the third part 201 may have a discharge port b2, and the end of the third part 201 away from the fourth part 202 may have a feed port b1. Wherein, the second portion 101b in the first tube shell 101 and the fourth portion 202 in the feeding pipeline 200 may both be in a straight state or a bent state. When the second portion 101b in the first tube shell 101 and the fourth portion 202 in the feeding pipeline 200 are both in a straight state, the axis centerline of the first portion 101a in the first tube shell 101 and the axis centerline of the second portion 101b may be parallel to each other; the axis centerline of the third portion 201 in the feeding pipeline 200 and the axis centerline of the fourth portion 202 may also be parallel to each other. When the second portion 101b in the first tube shell 101 and the fourth portion 202 in the feeding pipeline 200 are both in a bent state, the axis centerline of the first portion 101a in the first tube shell 101 and the axis centerline of the second portion 101b may intersect; the axis centerline of the third portion 201 in the feeding pipeline 200 and the axis centerline of the fourth portion 202 may intersect. It should be noted that the first portion 101a in the first tube shell 101 and the third portion 201 in the feeding pipeline 200 are both in a straightened state.

[0048] It should be noted that during the actual use of the desulfurization spray gun 000 after it is installed on the side of the flue, the operator needs to determine the angle between the direction of the desulfurization spray gun outlet a2 and the flow direction of the flue gas in the flue according to the mixing characteristics of the desulfurizer and the flue gas in the flue. Usually, the angle between the direction of the desulfurization spray gun outlet a2 and the flow direction of the flue gas in the flue ranges from 0 degrees to 90 degrees. For example, please refer to Figure 5 and Figure 8 , Figure 8It is a schematic diagram of the connection between a desulfurization spray gun and a flue provided by an embodiment of the present application. For flue A1, according to the mixing characteristics of the flue gas and desulfurizing agent in flue A, it is determined that the included angle between the orientation of the air outlet a2 of the desulfurization spray gun 000 and the flow direction of the flue gas in the flue is 90 degrees, so that the second part 101b in the first pipe shell 101 is in a straightened state, and the first pipe shell 101 is in a straight cylindrical shape at this time. Please refer to Figure 6 and Figure 9 , Figure 9 It is another schematic diagram of the connection between a desulfurization spray gun and a flue provided by an embodiment of the present application. For flue B, according to the mixing characteristics of the flue gas and desulfurizing agent in flue B, it is determined that the included angle between the orientation of the air outlet a2 of the desulfurization spray gun and the flow direction of the flue gas in the flue is 0 degree, that is, the orientation of the air outlet of the desulfurization spray gun is the same as the flow direction of the flue gas in the flue, so that the second part 101b in the first pipe shell 101 is in a bent state. Please refer to Figure 7 and Figure 10 , Figure 10 It is still another schematic diagram of the connection between a desulfurization spray gun and a flue provided by an embodiment of the present application. For flue C, according to the mixing characteristics of the flue gas and desulfurizing agent in flue C, it is determined that the included angle between the orientation of the air outlet a2 of the desulfurization spray gun and the flow direction of the flue gas in the flue is an acute angle, so that the second part 101b in the first pipe shell 101 is also in a bent state.

[0049] In the embodiment of the present application, the second part 101b in the first pipe shell 101 and the fourth part 202 in the feeding pipeline 200 can both be tubular structures made of flexible materials, so that the second part 101b in the first pipe shell 101 and the fourth part 202 in the feeding pipeline 200 can both be switched between a straightened state and a bent state after being subjected to a certain external force. It should be noted that in other possible implementation manners, different forms of the second part 101b and the fourth part 202 can be manufactured respectively, and the operator can connect different second parts 101b to the same first part 101a in the first pipe shell 101 according to the mixing characteristics of the flue gas and desulfurizing agent in the flue, and connect different fourth parts 202 to the same third part 201 in the feeding pipeline 200. The second part 101b and the fourth part 202 can be made of metal materials, such as steel. Or, different desulfurization spray guns can be manufactured respectively, and the second part and the fourth part in each desulfurization spray gun have one form.

[0050] Optionally, as Figure 7As shown, the outer side surface of the outer shell 100 in the desulfurization spray gun 000 may be provided with a fastening connector 103, which can be used for detachable connection with the outer side surface of the flue. In this case, by providing the fastening connector 103 on the outer side surface of the outer shell 100 of the desulfurization spray gun 000 and connecting the fastening connector 103 with the flue, the connection between the desulfurization spray gun 000 and the flue can be achieved. When the desulfurization spray gun has been operating for a period of time and needs to be repaired, the fastening connector 103 can be directly detached from the flue, and the desulfurization spray gun can be withdrawn from the flue for inspection and maintenance, which makes the installation and disassembly steps of the desulfurization spray gun relatively convenient and improves the working efficiency of the operator.

[0051] In the present application, the fastening connector 103 on the outer shell 100 may have a connection hole, and the desulfurization spray gun may further include: a locking member (not shown in the figure), which can pass through the connection hole on the fastening connector 103 and be tightly connected with the flue. Exemplarily, the fastening connector 103 may have a plurality of annularly distributed connection holes, that is, the fastening connector 103 may be a connecting flange. During the installation process of the desulfurization spray gun and the flue, the desulfurization spray gun can be connected with a flange interface preset in the flue through its own connecting flange. For example, for the renovation project of the existing flue, a flange interface can be installed by opening a hole in the flue, and the desulfurization spray gun is inserted into the flange interface and connected with the connecting flange, which makes the renovation workload smaller and facilitates the implementation of the renovation. For new construction projects, a flange interface can be directly reserved on the flue, and the desulfurization spray gun is inserted into the flange interface and connected with the connecting flange.

[0052] In the embodiment of the present application, as Figure 7 shown, the desulfurization spray gun 000 may further include: an auxiliary material pipe 400, which may be located outside the outer shell 100, and one end of the auxiliary material pipe 400 is fixedly connected to the feed pipeline 200 at the feed inlet b1 of the feed pipeline 200. In this case, by providing the auxiliary material pipe 400 connected to the feed inlet b1 outside the outer shell 100, the desulfurization spray gun 000 can be conveniently connected with the feeding device through the auxiliary material pipe 400, so that the feeding device can smoothly transport the desulfurizing agent into the feed pipeline 200.

[0053] Optionally, as Figure 7 shown, the desulfurization spray gun 000 may further include: a seal 500, which may be fixed at the connection position between the auxiliary material pipe 400 and the feed inlet b1 of the feed pipeline 200. In this case, by providing the seal 500 at the connection between the auxiliary material pipe 400 and the feed inlet b1, the seal 500 can ensure good sealing at the connection position between the auxiliary material pipe 400 and the feed inlet b1. On the one hand, it enables the desulfurizing agent to all enter the feed pipeline 200 and prevents the feeding device for transporting the desulfurizing agent from relieving pressure at the connection position between the auxiliary material pipe 400 and the feed inlet b1.

[0054] In summary, the embodiment of the present application provides a desulfurization spray gun, which may include: a housing, a feeding pipeline, and a plurality of blades. The desulfurization spray gun can be installed on the flue so that the desulfurizing agent sprayed from the desulfurization spray gun can be mixed with the flue gas in the flue and produce a chemical reaction. By arranging a plurality of annularly distributed blades at the end of the gas flow channel formed between the inner side surface of the housing and the inner side surface of the feeding pipeline, in this way, the high-speed air flow introduced from the air inlet of the housing circulates in the gas flow channel, and then forms a strong swirling air flow after being guided by the plurality of swirling blades. The desulfurizing agent introduced from the feeding port of the feeding pipeline is sprayed into the area where the swirling air flow is located from the discharging port after passing through the feeding pipeline. The desulfurizing agent and the swirling air flow are ejected at substantially the same cross-section. Under the strong centrifugal force of the swirling air flow, the desulfurizing agent spreads rapidly in a conical shape, significantly improving the ability of the desulfurizing agent to spread around, ensuring the full and uniform mixing of the desulfurizing agent and the flue gas, and thus ensuring a good removal effect of the harmful substances in the flue gas by the desulfurization spray gun. In addition, the desulfurization spray gun in the present application does not require large structures such as a spray gun back plate and a static mixer, making the overall structure of the desulfurization spray gun simple and convenient for processing and manufacturing, and at the same time, it is convenient for installation and maintenance, so as to facilitate maintenance.

[0055] The embodiment of the present application also provides a desulfurization system, which may include: a desulfurization spray gun, a wind guiding device, and a feeding device (not shown in the figure). The wind guiding device and the feeding device can be respectively connected to the air inlet and the feeding port of the desulfurization spray gun, so that the wind guiding device can transport high-speed air flow into the desulfurization spray gun (for example, the flow rate range of the high-speed air flow can be 10 m / s to 70 m / s, for example, any value between 20 m / s and 50 m / s), and the feeding device can transport the desulfurizing agent into the desulfurization spray gun. Exemplarily, the wind guiding device can be a blower.

[0056] It should be noted that in the drawings, the dimensions of layers and regions may be exaggerated for clarity of illustration. And it can be understood that when an element or layer is referred to as being "on" another element or layer, it can be directly on the other element, or there may be an intermediate layer. Additionally, it can be understood that when an element or layer is referred to as being "under" another element or layer, it can be directly under the other element, or there may be more than one intermediate layer or element. Further, it can be understood that when a layer or element is referred to as being "between" two layers or two elements, it can be the only layer between the two layers or two elements, or there may be more than one intermediate layer or element. Like reference numerals throughout indicate like elements.

[0057] In the present application, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. The term "plurality" means two or more unless otherwise clearly defined.

[0058] The above are only optional embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included within the protection scope of the present application.

Claims

1. A desulfurization spray gun, characterized in that, include: housing, feed line and multiple blades; The first end of the housing has an air inlet, and the second end of the housing has an air outlet communicated with the air inlet; At least part of the feeding pipeline is located in the shell, and a gas flow channel is formed between the outer wall of the feeding pipeline and the inner wall of the shell, and the gas flow channel is connected with the gas inlet and the gas outlet. One end of the feeding pipeline has a feeding port, and the feeding port is exposed from the first end of the shell, and the other end of the feeding pipeline has a discharge port connected with the feeding port, and the discharge port is located at the gas outlet; The multiple blades are located in the gas flow channel and are arranged adjacent to the gas outlet. The multiple blades are distributed around the feeding pipeline. One end of the blade is fixedly connected to the outer wall of the feeding pipeline, and the other end is fixedly connected to the inner wall of the shell.

2. The desulfurization spray gun according to claim 1, characterized in that, The housing comprises: a first tube shell and a second tube shell, the first tube shell has the air outlet, the feeding pipeline is located in the first tube shell, and the extending direction of the feeding pipeline is parallel to the extending direction of the first tube shell; one end of the second tube shell is fixedly connected to the outer side surface of the first tube shell, and the other end of the second tube shell has the air inlet; The included angle between the extension direction of the second tube shell and the extension direction of the first tube shell is an acute angle, and the other end of the second tube shell is farther away from the air outlet than the one end of the second tube shell.

3. The desulfurization spray gun according to claim 2, wherein The axis center line of the first tube shell coincides with the axis center line of the feeding pipeline.

4. The desulfurization spray gun according to claim 2, characterized in that, The first tube shell comprises: a first part and a second part arranged in sequence along the extension direction of the first tube shell, one end of the first part is connected to one end of the second part, and one end of the second part away from the first part has the gas outlet; the feeding pipeline comprises: a third part located in the first part, and a fourth part located in the second part, one end of the third part is connected to one end of the fourth part, and one end of the fourth part away from the third part has the discharge port; Among them, the second part and the fourth part both have a straight state or a bent state. When the second part and the fourth part are both in the straight state, the axis line of the first part is parallel to the axis line of the second part, and the axis line of the third part is parallel to the axis line of the fourth part; when the second part and the fourth part are both in the bent state, the axis line of the first part intersects with the axis line of the second part, and the axis line of the third part intersects with the axis line of the fourth part.

5. The desulfurization spray gun according to claim 4, characterized in that, in, The second part and the fourth part are both tubular structures made of flexible material, so that the second part and the fourth part can be switched between the straightened state and the bent state.

6. The desulfurization spray gun according to any one of claims 1-5, characterized in that, The outer side of the shell is provided with a fastening connection piece, and the fastening connection piece is used for detachably connecting with the flue.

7. The desulfurization spray gun according to claim 6, characterized in that, The fastening connector has a connecting hole, and the desulfurization lance further comprises a locking member, which passes through the connecting hole and is connected to the flue.

8. The desulfurization spray gun according to any one of claims 1-5, characterized in that, The desulfurization spray gun further includes: an auxiliary material pipe, the auxiliary material pipe is located outside the housing, and one end of the auxiliary material pipe is connected to the feeding pipeline at the feeding port.

9. The desulfurization spray gun according to claim 8, wherein The desulfurization spray gun further includes: a seal, and the seal is fixed at the connection position between the auxiliary material pipe and the feeding port.

10. The desulfurization spray gun according to any one of claims 1-5, characterized in that, The plane where the air outlet is located is flush with the plane where the discharge outlet is located.

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