SNCR (selective non-catalytic reduction) flue gas denitration device

Abstract

The utility model discloses an SNCR (selective non-catalytic reduction) flue gas denitration device and belongs to the technical field of denitration devices. Comprising a flue body and a connecting pipe, a connector is arranged at the bottom end of the connecting pipe, a spray head body is inserted into the bottom end of the connector, the spray head body penetrates through the end of the flue body and extends into the flue body, and fixing open grooves are formed in the periphery of the outer wall of the connector; and fixing seats are arranged on the periphery of the outer wall of the flue main body. The fixing base can be pulled to drive the fixing block to be separated from the interior of the fixing open groove, at the moment, the connector and the spray head body can be directly taken out to be conveniently overhauled and replaced, and during installation, the connector and the spray head body are directly embedded into the hole in the flue body, so that installation is convenient. And then, after the fixing block moves, the fixing block is restored through the supporting spring, so that the fixing block is embedded into the fixing open groove, and limiting and fixing of the connector are completed.

Description

Technical Field

[0001] The utility model relates to the technical field of denitrification devices, in particular to a SNCR flue gas denitrification device. Background Art

[0002] NCR stands for selective non-catalytic reduction technology. The principle is that no catalyst is used. An amino reducing agent is sprayed at an appropriate position in the boiler furnace or the inlet of the cyclone separation drum to reduce NOx to N2. The reaction temperature window is around 800 to 1100 degrees, and the residence time in the flue is long, and the reaction is sufficient.

[0003] Urea and other reducing agents are sprayed evenly into the flue through nozzles, and the existing nozzles are usually fixedly connected to the flue. Therefore, when the nozzles are blocked or damaged and need to be replaced, the operation is inconvenient. Therefore, we propose an SNCR flue gas denitrification device to solve the above problem. Utility Model Content

[0004] The utility model aims to solve the shortcomings of the prior art involved in the background technology and proposes a SNCR flue gas denitrification device.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A SNCR flue gas denitrification device comprises a flue main body and a connecting pipe, wherein a connecting head is arranged at the bottom end of the connecting pipe, a nozzle main body is inserted at the bottom end of the connecting head, the nozzle main body passes through the end of the flue main body and extends to the inside of the flue main body, the outer wall of the connecting head is arranged with fixed grooves all around, the outer wall of the flue main body is arranged with fixed seats all around, the end of the fixed seat is arranged with fixed blocks, the fixed blocks and the fixed grooves are adapted to each other, and a sealing gasket is arranged at the top end of the flue main body, and the sealing gasket is located directly below the connecting head;

[0007] After the nozzle body is embedded in the interior of the flue body, the fixing seat drives the fixing block to be embedded in the interior of the fixed groove for limiting the position, so that the connecting head and the nozzle body can be directly separated from the interior of the flue body, which is convenient for disassembly, maintenance and replacement.

[0008] Preferably, a sliding block is provided at the end of the fixed block, a sliding groove is provided on the side wall of the fixed seat, the sliding block extends into the interior of the sliding groove, and the fixed block slides in the interior of the sliding groove through the sliding block;

[0009] The height of the fixing block can be adjusted to accommodate the installation of connectors of different heights.

[0010] Preferably, a rotating threaded rod is inserted at the top of the fixing seat, the rotating threaded rod extends to the inside of the sliding slot, the sliding block is sleeved on the outside of the rotating threaded rod, and the sliding block is threadedly connected to the rotating threaded rod;

[0011] The sliding block is driven to move by rotating the rotating threaded rod, so that the sliding block can better drive the fixed block to move. At the same time, the rotating threaded rod has a certain self-locking structure, thereby completing the position limitation of the fixed block.

[0012] Preferably, a moving block is arranged at the bottom end of the fixing seat, a moving groove matching with the moving block is arranged at the top end of the flue body, a fixed shaft rod is arranged inside the moving groove, and the moving block is sleeved on the outside of the fixed shaft rod;

[0013] The fixing seat can be made to slide, so that the connecting head pushes the fixing block to move when inserted into the flue body, and then the fixing block is restored and embedded into the fixing groove to complete the fixation, making the installation of the nozzle body driven by the connecting head more convenient.

[0014] Preferably, a support spring is sleeved on the outside of the fixed shaft, one end of the support spring is fixedly connected to the end of the moving block, and the other end of the support spring is fixedly connected to the inside of the moving groove at the top of the flue body;

[0015] When the fixing block drives the fixing seat to move, the support spring can drive the fixing seat to restore, thereby making it more convenient for the fixing block to be embedded in the fixing slot for limiting.

[0016] Preferably, a threaded interface is provided at the top of the nozzle body, the threaded interface extends to the interior of the connector, and the threaded interface is threadedly connected to the inner wall of the connector;

[0017] The nozzle body can be disassembled and replaced by directly rotating it, which is simple and convenient to operate.

[0018] Preferably, a movable cavity is provided at the bottom end of the connector, a limiting rod is inserted into the movable cavity, a plurality of limiting holes are provided in an annular shape at the top end of the nozzle body, and the limiting rod and the limiting holes are adapted to each other;

[0019] When the nozzle body is placed vertically, the limit rod can be embedded into the limit hole under the action of gravity to limit the nozzle body, so that the nozzle body cannot rotate, thereby making the nozzle body more stable during operation. The nozzle body can be placed upward so that the limit rod can be separated from the limit hole. At this time, the nozzle body can be disassembled and separated.

[0020] Compared with the prior art, the beneficial effects of the utility model are:

[0021] The utility model can pull the fixing seat so that the fixing seat drives the fixing block to be separated from the interior of the fixing groove. At this time, the connecting head and the nozzle body can be directly taken out, which is convenient for inspection and replacement. During installation, the connecting head and the nozzle body are directly embedded in the hole on the flue body, so that the connecting head decompresses the fixing block. Subsequently, the fixing block moves and is restored by the supporting spring, so that the fixing block is embedded in the interior of the fixing groove to complete the limiting fixation of the connecting head.

[0022] The utility model can make the nozzle body be placed vertically downward after being installed and embedded in the interior of the flue body, and the limit rod is embedded in the interior of the limit hole under the action of gravity for limiting, thereby avoiding the nozzle body from rotating loose, making the nozzle body more stable after installation, otherwise it can be rotated and disengaged, making disassembly more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a three-dimensional structural schematic diagram of a SNCR flue gas denitrification device proposed by the utility model;

[0024] Figure 2 for Figure 1 A schematic diagram of the front cross-sectional structure of the separation of the middle flue body and the nozzle body;

[0025] Figure 3 for Figure 2 A schematic diagram of the front cross-sectional structure of the middle fixing seat;

[0026] Figure 4 for Figure 2 Schematic diagram of the cross-sectional structure of the middle connector and the nozzle body in the separated state.

[0027] In the figure: 1. flue body; 2. connecting pipe; 3. connecting head; 4. nozzle body; 5. threaded interface; 6. movable cavity; 7. limiting rod; 8. limiting hole; 9. sealing gasket; 10. fixed slot; 11. fixed seat; 12. fixed block; 13. sliding slot; 14. sliding block; 15. rotating threaded rod; 16. moving block; 17. fixed shaft rod; 18. supporting spring. DETAILED DESCRIPTION

[0028] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0029] Reference Figure 1-4In the SNCR flue gas denitrification device shown, a connector 3 is provided at the bottom end of the connecting pipe 2, and then a nozzle body 4 is inserted at the bottom end of the connector 3, and the nozzle body 4 passes through the end of the flue body 1 and extends to the inside of the flue body 1, and at the same time, a sealing gasket 9 is provided at the top of the flue body 1, so that the sealing gasket 9 is located directly below the connector 3, and the outer wall of the connector 3 is provided with a fixed groove 10 all around, and then a fixing seat 11 is provided all around the outer wall of the flue body 1, and a fixing block 12 is provided at the end of the fixing seat 11, and at the same time, the fixing block 12 and the fixing groove 10 are adapted to each other, so that a sliding block 14 is provided at the end of the fixing block 12, and then a sliding groove 13 is provided on the side wall of the fixing seat 11, and the sliding block 14 extends to the inside of the sliding groove 13, and at the same time, the fixing block 1 The sliding block 14 slides inside the sliding groove 13, so that the top of the fixed seat 11 is inserted with a rotating threaded rod 15, and then the rotating threaded rod 15 extends to the inside of the sliding groove 13, and the sliding block 14 is sleeved on the outside of the rotating threaded rod 15, and the sliding block 14 is threadedly connected with the rotating threaded rod 15, and at the same time, the bottom end of the fixed seat 11 is provided with a moving block 16, so that the top of the flue body 1 is provided with a moving groove that is adapted to the moving block 16, and the inside of the moving groove is provided with a fixed shaft rod 17, and then the moving block 16 is sleeved on the outside of the fixed shaft rod 17, and the outside of the fixed shaft rod 17 is sleeved with a supporting spring 18, and at the same time, one end of the supporting spring 18 is fixedly connected to the end of the moving block 16, so that the other end of the supporting spring 18 is fixedly connected to the inside of the moving groove at the top of the flue body 1.

[0030] For a detailed description of the nozzle body 4 in this embodiment, please refer to Figure 2 and Figure 4 A threaded interface 5 is provided at the top of the nozzle body 4, and then the threaded interface 5 is extended to the inside of the connecting head 3, and the threaded interface 5 is threadedly connected to the inner wall of the connecting head 3. At the same time, a movable cavity 6 is opened at the bottom end of the connecting head 3, so that a limiting rod 7 is inserted into the inside of the movable cavity 6, and then a plurality of groups of limiting holes 8 are annularly opened at the top of the nozzle body 4, and the limiting rod 7 and the limiting hole 8 are adapted to each other.

[0031] Working principle: When the utility model is in use, the fixing seat 11 is pulled so that the fixing seat 11 drives the fixing block 12 to disengage from the inside of the fixed groove 10. At this time, the connecting head 3 and the nozzle body 4 can be directly pulled out from the flue body 1, and then the nozzle body 4 is placed vertically upward, so that the limiting rod 7 is disengaged from the inside of the limiting hole 8 under the action of gravity. At this time, the nozzle body 4 can be directly rotated to complete the disassembly and separation of the nozzle body 4, and then a new nozzle body 4 is replaced to complete the installation, and then the nozzle body 4 is inserted downward into the inside of the flue body 1. When the nozzle body 4 is downward, the limiting rod 7 falls into the inside of the limiting hole 8 by gravity to complete the limiting, thereby preventing the limiting hole 8 from loosening and detaching.

[0032] During installation, the connecting head 3 comes into contact with the fixing block 12, causing the fixing block 12 to move along the inclined surface, and then the fixing seat 11 is driven to recover through the support spring 18, so that the fixing seat 11 drives the fixing block 12 to be embedded into the interior of the fixed groove 10 to complete the installation, making the installation of the connecting head 3 and the nozzle body 4 more convenient. At the same time, the threaded rod 15 can be rotated to drive the fixing block 12 to move, and can be adjusted according to the height of the fixed groove 10, so that the fixing block 12 can be better embedded into the interior of the fixed groove 10 to complete the installation.

[0033] In the present invention, the installation method, connection method or setting method of all the components mentioned above are common mechanical methods, and the specific structures, models and coefficient indicators of all its components are its own technology. As long as it can achieve its beneficial effects, it can be implemented, so it will not be elaborated.

[0034] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

[0035] In the present utility model, unless otherwise stated, the directional words contained in the terms such as "up, down, left, right, front, back, inside, outside, vertical, horizontal" only represent the orientation of the term in normal use, or are common names understood by those skilled in the art, and should not be regarded as limitations on the term. At the same time, number series nouns such as "first", "second" and "third" do not represent specific quantities and orders, but are merely used to distinguish names. Moreover, the terms "include", "comprise" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device that includes a series of elements includes not only those elements, but also includes other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device.

Claims

1. A SNCR flue gas denitrification device, comprising a flue main body (1) and a connecting pipe (2), characterized in that: A connector (3) is provided at the bottom end of the connecting pipe (2), a nozzle body (4) is inserted into the bottom end of the connector (3), the nozzle body (4) penetrates the end of the flue body (1) and extends into the interior of the flue body (1), the outer wall of the connector (3) is provided with fixed grooves (10) on all sides, the outer wall of the flue body (1) is provided with fixed seats (11) on all sides, the end of the fixed seat (11) is provided with a fixed block (12), the fixed block (12) and the fixed groove (10) are mutually adapted, and a sealing gasket (9) is provided at the top end of the flue body (1), the sealing gasket (9) is located directly below the connector (3).

2. The SNCR flue gas denitrification device according to claim 1, characterized in that: A sliding block (14) is provided at the end of the fixed block (12); a sliding groove (13) is provided on the side wall of the fixed seat (11); the sliding block (14) extends into the interior of the sliding groove (13); and the fixed block (12) slides in the interior of the sliding groove (13) via the sliding block (14).

3. The SNCR flue gas denitrification device according to claim 2, characterized in that: A rotating threaded rod (15) is inserted at the top end of the fixing seat (11), the rotating threaded rod (15) extends into the interior of the sliding slot (13), the sliding block (14) is sleeved on the exterior of the rotating threaded rod (15), and the sliding block (14) is threadably connected to the rotating threaded rod (15).

4. The SNCR flue gas denitrification device according to claim 3, characterized in that: A moving block (16) is arranged at the bottom end of the fixing seat (11), a moving groove adapted to the moving block (16) is provided at the top end of the flue body (1), a fixed shaft (17) is arranged inside the moving groove, and the moving block (16) is sleeved on the outside of the fixed shaft (17).

5. The SNCR flue gas denitrification device according to claim 4, characterized in that: A support spring (18) is sleeved on the outside of the fixed shaft rod (17), one end of the support spring (18) is fixedly connected to the end of the moving block (16), and the other end of the support spring (18) is fixedly connected to the inside of the moving groove at the top of the flue body (1).

6. The SNCR flue gas denitrification device according to claim 1, characterized in that: A threaded interface (5) is provided at the top end of the nozzle body (4), the threaded interface (5) extends into the interior of the connector (3), and the threaded interface (5) is threadedly connected to the inner wall of the connector (3).

7. The SNCR flue gas denitrification device according to claim 6, characterized in that: The bottom end of the connector (3) is provided with a movable cavity (6), a limiting rod (7) is inserted into the inside of the movable cavity (6), and the top end of the nozzle body (4) is provided with a plurality of groups of limiting holes (8) in an annular shape, and the limiting rod (7) and the limiting holes (8) are adapted to each other.

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