Novel ammonia spraying grid beneficial to mixing of ammonia and air

Abstract

The utility model discloses a novel ammonia injection grid beneficial to mixing of ammonia and air, which relates to the technical field of flue gas treatment and comprises an injection main pipe, injection branch pipes and injection heads, the injection branch pipes are arranged on the injection main pipe and communicated with the injection main pipe, a plurality of joints are arranged on the injection branch pipes, and the joints are communicated with the injection main pipe. A guide groove, a plugging head and a spring are arranged in the connector, the plugging head is arranged in the guide groove in a sliding mode, one end of the spring is fixedly connected with the spraying branch pipe, the other end of the spring is fixedly connected with the plugging head, an external thread is arranged at the top of the connector, an internal thread is correspondingly arranged at the connecting end of the spraying head, and the plugging head is fixedly connected with the external thread. The injector head is in threaded connection with the connector, an ejector rod is arranged in the middle of the inner side of the injector head, and a turbulent flow block is arranged at the top of the injector head. According to the utility model, the mixing uniformity of ammonia-containing air and flue gas can be improved, and the injector head is convenient to disassemble and maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of flue gas treatment, in particular to a new ammonia injection grid which is beneficial to the mixing of ammonia and air. Background Art

[0002] The function of an ammonia injection grid (AIG) is to evenly inject ammonia or ammonia-containing air into the flue gas. The uniformity of the mixing of ammonia or ammonia-containing air with the flue gas directly determines the NO and ammonia escape concentration distribution at the denitration reactor outlet, affecting overall denitration efficiency and NH₄HSO₄ blockage in downstream equipment. AIGs used in denitration systems are mostly grid-type. However, in existing technologies, flue gas passes through the AIG without being intercepted, which can easily cause blockage in pipelines or nozzles, hindering the adequate mixing of ammonia and flue gas. Furthermore, nozzles cannot be removed individually, making them difficult to disassemble and repair.

[0003] Therefore, how to provide a new ammonia injection grid that can improve the mixing uniformity of ammonia and flue gas and facilitate the disassembly and maintenance of the injection head is a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0004] The purpose of the utility model is to provide a new type of ammonia spray grid which is conducive to the mixing of ammonia and air. The utility model improves the uniformity of the mixing of ammonia and flue gas by arranging a detachable spoiler block on the injection head, avoids the blockage of the separation head, and the detachable structure facilitates the disassembly and maintenance of the injection head.

[0005] To achieve the above-mentioned purpose, the utility model provides a new ammonia injection grid that is conducive to the mixing of ammonia and air, including an injection main pipe, an injection branch pipe and an injection head. The injection branch pipe is arranged on the injection main pipe and is connected to the injection main pipe. A number of joints are provided on the injection branch pipe, and a guide groove, a plugging head and a spring are provided inside the joint. The plugging head is slidably arranged in the guide groove, and the guide groove is a hollow structure. One end of the spring is fixedly connected to the injection branch pipe, and the other end of the spring is fixedly connected to the plugging head. The top of the joint is provided with an external thread, and the connecting end of the injection head is correspondingly provided with an internal thread. The injection head is threadedly connected to the joint, a push rod is provided at the middle part of the inner side of the injection head, and a spoiler is provided at the top of the injection head.

[0006] Furthermore, the spoiler is in an inverted cone shape, and mounting plates are provided on both sides of the spray head, and the spoiler is detachably fixed on the mounting plates.

[0007] Furthermore, sections are provided on both sides of the spoiler, threaded holes are provided on the sections, and the spoiler is fixed to the top of the mounting plate by bolts.

[0008] Furthermore, a sealing ring is provided on the top of the plugging head.

[0009] Furthermore, the distances between adjacent injection branches are the same.

[0010] The beneficial effects of the present invention are as follows: the present invention can produce a turbulent effect on the ammonia-air mixture by arranging a turbulent block on the injection head, so that the ammonia and the flue gas are fully mixed, and at the same time it can also prevent ash from falling from above, and avoid smoke and dust clogging the injection head. The injection head adopts a detachable connection method, which is convenient for its maintenance and replacement, and the number of injection heads installed can be adjusted according to the actual ammonia injection needs. The joint of the injection branch pipe is automatically blocked by a spring when the injection head is not installed, thereby preventing impurities from entering the injection branch pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the main structure of the utility model;

[0012] Figure 2 for Figure 1 A partial enlarged view of the middle part;

[0013] Figure 3 This is a schematic diagram of the internal structure of the injection branch pipe at the joint of the utility model;

[0014] Figure 4 This is a cross-sectional view of the spray head and connector after installation.

[0015] Among them, 1. injection main pipe; 2. injection branch pipe; 3. injection head; 4. joint; 5. guide groove; 6. sealing head; 7. spring; 8. push rod; 9. mounting plate; 10. spoiler block; 11. sealing ring. DETAILED DESCRIPTION

[0016] In order to achieve the above-mentioned purpose and effect, the technical means and structure adopted by the present invention are described in detail with reference to the accompanying drawings for the features and functions of the preferred embodiments of the present invention.

[0017] In the description of the present invention, it should be noted that the terms, "upper", "lower", "left", "right", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention; the terms "installed", "connected" and "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 a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] Example 1

[0019] like Figure 1-4 As shown, this embodiment discloses a new ammonia injection grid that is conducive to ammonia-air mixing, including an injection main pipe 1, an injection branch pipe 2 and an injection head 3. The injection branch pipes 2 are arranged on the injection main pipe 1 and are connected to the injection main pipe 1. The spacing between adjacent injection branch pipes 2 is the same.

[0020] Several joints 4 are provided on the injection branch pipe 2. The interior of the joint 4 is provided with a guide groove 5, a blocking head 6 and a spring 7. The blocking head 6 is slidably set in the guide groove 5. The guide groove 5 is a hollow structure. A sealing ring 11 is provided at the top of the blocking head 6 for sealing the joint. One end of the spring 7 is fixedly connected to the injection branch pipe 2, and the other end of the spring 7 is fixedly connected to the blocking head 6. An external thread is provided on the top of the joint 4, and an internal thread is provided at the connecting end of the injection head 3. The injection head 3 is threadedly connected to the joint 4. A push rod 8 is provided on the inner middle part of the injection head 3, and a spoiler 10 is provided on the top of the injection head 3.

[0021] Specifically, the spoiler 10 is in an inverted cone shape, with sections on both sides of the spoiler 10 and threaded holes on the sections. Mounting plates 9 are welded on both sides of the spray head 3, and the spoiler 10 is detachably fixed to the top of the mounting plates 9 by bolts.

[0022] Under normal conditions, the blocking head 6 slides to the top of the joint 4 under the push of the spring 7, abuts against the joint 4, realizes the sealing at the joint 4, and prevents impurities from entering the injection branch 2. When the injection head 3 is installed, the top rod 8 of the injection head 3 pushes the blocking head 6 to slide downward, below the hollow part of the guide groove 5, to realize the connection between the injection head 3 and the injection branch 2. At this time, ammonia air enters from the guide groove 5 and enters the injection head 3 through the joint 4 for injection.

[0023] The above description is merely a preferred embodiment of the present invention and does not limit the technical scope of the present invention. Therefore, any minor modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A new type of ammonia injection grid that is conducive to ammonia-air mixing, characterized in that: It includes a jet main pipe, a jet branch pipe and a jet head. The jet branch pipes are arranged on the jet main pipe and are connected to the jet main pipe. Several joints are provided on the jet branch pipes. The interior of the joints is provided with guide grooves, a blocking head and a spring. The blocking head is slidably arranged in the guide groove. The guide groove is a hollow structure. One end of the spring is fixedly connected to the jet branch pipe, and the other end of the spring is fixedly connected to the blocking head. The top of the joint is provided with an external thread, and the connecting end of the jet head is correspondingly provided with an internal thread. The jet head is threadedly connected to the joint, a push rod is provided on the inner middle part of the jet head, and a spoiler is provided on the top of the jet head.

2. A novel ammonia injection grid that is beneficial to ammonia-air mixing as claimed in claim 1, characterized in that: The spoiler is in an inverted cone shape. Mounting plates are provided on both sides of the spray head. The spoiler is detachably fixed on the mounting plates.

3. A novel ammonia injection grid that is beneficial to ammonia-air mixing as claimed in claim 2, characterized in that: Both sides of the spoiler are provided with cut surfaces, the cut surfaces are provided with threaded holes, and the spoiler is fixed to the top of the mounting plate by bolts.

4. A novel ammonia injection grid that is beneficial to ammonia-air mixing as claimed in claim 1, characterized in that: A sealing ring is provided on the top of the plugging head.

5. The novel ammonia injection grid that is beneficial to ammonia-air mixing as claimed in claim 1, characterized in that: The distances between adjacent injection branches are the same.

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