Cyclone separator for reducing generation of nitrogen oxides

Abstract

The utility model discloses a cyclone separator for reducing generation of nitrogen oxides, which comprises an outlet flue and an ammonia gun connected with the outlet flue, the outlet flue is provided with an ammonia inlet channel, and the ammonia gun is communicated with the ammonia inlet channel; the ammonia gun comprises a main ammonia gun and a standby ammonia gun, and a switching assembly used for switching the main ammonia gun and the standby ammonia gun is arranged between the ammonia gun and the outlet flue. The cyclone separator capable of reducing the generation of the nitrogen oxides is reasonable in structure, and the ammonia spraying port is additionally arranged at the outlet flue of the cyclone separator, so that the mixing of flue gas and ammonia water is enhanced, the reaction time of the flue gas is prolonged, the efficiency is improved, and ammonia escape is reduced.

Description

Technical Field

[0001] The utility model relates to a cyclone separator, in particular to a cyclone separator for reducing the generation of nitrogen oxides. Background Art

[0002] With the improvement of environmental protection requirements, the emission standards for nitrogen oxide (NOx) pollutants are getting higher and higher. Flue gas denitrification technologies can be divided into selective catalytic reduction (SCR) flue gas denitrification technology and selective non-catalytic reduction (SNCR) flue gas denitrification technology. Compared with the SCR flue gas denitrification technology, SNCR has the characteristics of low cost, simple process, moderate efficiency, etc., and is suitable for application in existing circulating fluidized bed boilers. Its basic principle is: injecting a reducing agent containing amino groups such as ammonia, urea, etc. into the temperature range of 850 - 1100 °C in the boiler, fully mixing with NOx in the flue gas and undergoing a NOx reduction reaction to generate pollution-free N2 and H2O.

[0003] The existing SNCR technology for circulating fluidized bed boilers mainly injects the reducing agent at the horizontal flue at the inlet of the cyclone separator. However, in actual production, the SNCR denitrification efficiency is low and the reducing agent is prone to escape.

[0004] Therefore, it is necessary to improve the cyclone separator in the existing technology. Summary of the Utility Model

[0005] The purpose of the utility model is to overcome the defects existing in the prior art and provide a cyclone separator for reducing the generation of nitrogen oxides. An ammonia injection port is added at the outlet flue of the cyclone separator, which enhances the mixing of the flue gas and ammonia water, increases the flue gas reaction time, improves the efficiency, and reduces ammonia escape.

[0006] To achieve the above technical effects, the technical solution of the utility model is: a cyclone separator for reducing the generation of nitrogen oxides, including an outlet flue and an ammonia gun connected to the outlet flue. The outlet flue is provided with an ammonia inlet channel, and the ammonia gun is communicated with the ammonia inlet channel; the ammonia gun includes a main ammonia gun and a spare ammonia gun, and a switching component for switching the use of the main ammonia gun and the spare ammonia gun is arranged between the ammonia gun and the outlet flue.

[0007] The preferred technical solution is that the switching component includes a mounting seat fixedly arranged on the outlet flue and a switching seat slidably arranged in the mounting seat. The ammonia gun is connected to the switching seat, and the mounting seat is provided with a through hole communicated with the ammonia inlet channel.

[0008] The preferred technical solution is that the switching seat is provided with a main through hole and a spare through hole. The main ammonia gun is inserted through the main through hole, and the spare ammonia gun is inserted through the spare through hole.

[0009] Preferably, the switching base is slidably connected to the mounting base, and the sliding direction of the switching base is parallel to the juxtaposed direction of the main perforation and the standby perforation.

[0010] Preferably, the switching base is provided with a damped sliding arrangement with the mounting base, and the switching base is fixedly provided with a grip for facilitating sliding.

[0011] Preferably, the ammonia gun has two working positions. In the first working position: the liquid outlet of the ammonia gun is arranged in the ammonia inlet channel or is arranged adjacent to the ammonia inlet channel; in the second working position, the ammonia gun is arranged in the switching base.

[0012] Preferably, the ammonia gun is provided with a sealing ring. In the first working position, the sealing ring is clamped between the switching base and the outer wall of the through hole.

[0013] Preferably, the switching base is provided with a groove for accommodating the sealing ring.

[0014] Preferably, it further includes an ammonia inlet pipe communicated with the ammonia gun, and a magnetic member is movably arranged on the ammonia inlet pipe.

[0015] The advantages and beneficial effects of the present utility model are as follows: The cyclone separator for reducing nitrogen oxides production of the present utility model has a reasonable structure. By arranging an ammonia gun at the outlet flue, the ammonia injection port is increased, the mixing of the flue gas and ammonia water is enhanced, the reaction time of the flue gas is increased, the efficiency is improved, and ammonia escape is reduced; The main ammonia gun and the standby ammonia gun are provided. When the main ammonia gun is not working smoothly, the standby ammonia gun can be switched in time to avoid affecting the denitrification efficiency. Description of the Drawings

[0016] Figure 1 is a schematic structural diagram of an embodiment of the cyclone separator for reducing nitrogen oxides production of the present utility model;

[0017] Figure 2 is Figure 1 explosion schematic diagram of;

[0018] Figure 3 is a schematic structural diagram of the switching assembly;

[0019] Figure 4 is Figure 3 explosion schematic diagram of;

[0020] Figure 5 is Figure 3 cross-sectional view of;

[0021] Figure 6 is Figure 4 cross-sectional view of;

[0022] Figure 7 It is a schematic structural diagram of the ammonia inlet pipe;

[0023] In the figure: 1. Outlet flue; 11. Ammonia inlet channel; 2. Ammonia lance; 21. Main ammonia lance; 22. Spare ammonia lance; 3. Mounting seat; 31. Through hole; 4. Switching seat; 41. Main perforation; 42. Spare perforation; 43. Grip; 44. Groove; 5. Sealing ring; 6. Ammonia inlet pipe; 7. Magnetic part. Specific embodiments

[0024] The following combines the drawings and embodiments to further describe the specific embodiments of the present invention. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0025] "Up" and "down" are referenced based on the normal use state of the silo, and are only for the convenience of describing the present invention 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 construed as a limitation of the present invention. Embodiment

[0026] As Figures 1-7 shown, the cyclone separator for reducing nitrogen oxide generation in the embodiment includes an outlet flue 1 and an ammonia lance 2 connected to the outlet flue 1. The outlet flue 1 is provided with an ammonia inlet channel 11, and the ammonia lance 2 is communicated with the ammonia inlet channel 11; the ammonia lance 2 includes a main ammonia lance 21 and a spare ammonia lance 22, and a switching assembly for switching the use of the main ammonia lance 21 and the spare ammonia lance 22 is arranged between the ammonia lance 2 and the outlet flue 1.

[0027] Through such a design, an ammonia lance is arranged at the outlet flue, the ammonia injection port is increased, the mixing of the flue gas and ammonia water is enhanced, the reaction time of the flue gas is increased, the efficiency is improved, and ammonia escape is reduced; the use of the main ammonia lance and the spare ammonia lance can be switched in time to avoid affecting the denitration efficiency.

[0028] Specifically, the switching assembly includes a mounting seat 3 fixedly arranged on the outlet flue 1 and a switching seat 4 slidably arranged in the mounting seat 3. The ammonia lance 2 is connected to the switching seat 4, and the mounting seat 3 is provided with a through hole 31 communicated with the ammonia inlet channel 11.

[0029] Through such a design, by adjusting the position of the switching seat 4, the main ammonia lance 21 or the spare ammonia lance 22 can be selected to communicate with the through hole 31.

[0030] Specifically, the switching seat 4 is provided with a main perforation 41 and a spare perforation 42. The main ammonia lance 21 is inserted through the main perforation 41, and the spare ammonia lance 22 is inserted through the spare perforation 42.

[0031] Through such a design, the purpose of connecting the main ammonia gun 21 and the spare ammonia gun 22 to the switching seat 4 is achieved.

[0032] Specifically, the switching seat 4 is slidably connected to the mounting seat 3, and the sliding direction of the switching seat 4 is parallel to the side-by-side direction of the main through hole 41 and the spare through hole 42.

[0033] Through such a design, the purpose of sliding adjustment of the switching seat 4 is achieved.

[0034] Specifically, the switching seat 4 is provided with a damping sliding arrangement with the mounting seat 3, and the switching seat 4 is fixedly provided with a grip 43 for facilitating sliding.

[0035] Through such a design, the convenience of sliding of the switching seat 4 is improved.

[0036] Specifically, the ammonia gun 2 has two working positions. In the first working position: the liquid outlet of the ammonia gun 2 is arranged in the ammonia inlet channel 11 or is arranged adjacent to the ammonia inlet channel 11; in the second working position, the ammonia gun 2 is arranged in the switching seat 4.

[0037] Through such a design, when the ammonia gun is not in use, interference with the outlet flue or the mounting seat 3 is avoided.

[0038] Specifically, the ammonia gun 2 is provided with a sealing ring 5. In the first working position, the sealing ring 5 is clamped between the switching seat 4 and the outer wall of the through hole 31.

[0039] Through such a design, when the ammonia gun 2 is in use, the inlet of the ammonia inlet channel 11 is sealed by the sealing ring 5, avoiding the escape of ammonia.

[0040] Specifically, the switching seat 4 is provided with a groove 44 for accommodating the sealing ring 5.

[0041] Through such a design, the groove 44 can accommodate the sealing ring of the spare ammonia gun, avoiding the sealing ring from being squeezed.

[0042] Furthermore, it further includes an ammonia inlet pipe 6 communicated with the ammonia gun 2, and a magnetic member 7 is movably arranged on the ammonia inlet pipe 6.

[0043] Through such a design, the convenience of installation of the ammonia inlet pipe 6 is improved, and it can be adsorbed on the iron pipes along the way.

[0044] The above is only the preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and refinements can still be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A cyclone separator for reducing the generation of nitrogen oxides, characterized in that: The invention comprises an outlet flue (1) and an ammonia gun (2) connected to the outlet flue (1); the outlet flue (1) is provided with an ammonia inlet passage (11); the ammonia gun (2) is arranged in communication with the ammonia inlet passage (11); the ammonia gun (2) comprises a main ammonia gun (21) and a spare ammonia gun (22); a switching component for switching between the main ammonia gun (21) and the spare ammonia gun (22) is arranged between the ammonia gun (2) and the outlet flue (1).

2. The cyclone separator for reducing nitrogen oxide generation according to claim 1, characterized in that: The switching assembly comprises a mounting seat (3) fixedly arranged on the outlet flue (1) and a switching seat (4) slidably arranged in the mounting seat (3); the ammonia gun (2) is connected to the switching seat (4); and the mounting seat (3) is provided with a through hole (31) communicating with the ammonia inlet channel (11).

3. The cyclone separator for reducing nitrogen oxide generation according to claim 2, characterized in that: The switching seat (4) is provided with a main through hole (41) and a spare through hole (42); the main ammonia gun (21) is inserted into the main through hole (41), and the spare ammonia gun (22) is inserted into the spare through hole (42).

4. The cyclone separator for reducing nitrogen oxide generation according to claim 3, characterized in that: The switching seat (4) is slidably connected to the mounting seat (3), and the sliding direction of the switching seat (4) is parallel to the side-by-side direction of the main through-hole (41) and the spare through-hole (42).

5. The cyclone separator for reducing nitrogen oxide generation according to claim 4, characterized in that: The switching seat (4) and the mounting seat (3) are arranged to damp sliding, and the switching seat (4) is fixedly provided with a handle (43) that facilitates sliding.

6. The cyclone separator for reducing nitrogen oxide generation according to claim 5, characterized in that: The ammonia gun (2) has two working positions. In the first working position, the liquid outlet of the ammonia gun (2) is arranged in the ammonia inlet channel (11) or is arranged close to the ammonia inlet channel (11); in the second working position, the ammonia gun (2) is arranged in the switching seat (4).

7. The cyclone separator for reducing nitrogen oxide generation according to claim 6, characterized in that: The ammonia gun (2) is provided with a sealing ring (5). In the first working position, the sealing ring (5) is clamped between the switching seat (4) and the outer wall of the through hole (31).

8. The cyclone separator for reducing nitrogen oxide generation according to claim 7, characterized in that: The switching seat (4) is provided with a groove (44) for accommodating the sealing ring (5).

9. The cyclone separator for reducing nitrogen oxide generation according to claim 1, characterized in that: It also comprises an ammonia inlet pipe (6) in communication with the ammonia gun (2), and a magnetic part (7) is movably provided on the ammonia inlet pipe (6).

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