Ammonia-air mixer adopting ammonia gas rotational flow
By using ammonia cyclone flow technology in the ammonia evacuator, a mixed cyclone of ammonia and diluted air is formed, which solves the problem of uneven mixing of ammonia and air in the existing ammonia evacuator, and improves the SCR denitrification efficiency and uniformity of the mixture.
Patent Information
- Application Number
- CN202420561924.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-21
- Publication Date
- 2025-05-16
- Estimated Expiration
- 2034-03-21
AI Technical Summary
The existing ammonia vacant mixers have unevenness when mixing ammonia and air, which affects the SCR denitrification efficiency, resulting in problems such as excessive ammonia emissions, waste of catalysts and accumulation of dust.
An ammonia air mixer with ammonia cyclone flow is used to form an ammonia cyclone flow through a cyclone cylinder and an axially distributed cyclone pipe, and the diluted wind in the barrel is swept to form a mixed cyclone flow, which increases the mixing degree of ammonia and diluted wind, and achieves uniform mixing of ammonia and air.
The uniform mixing of ammonia and air is achieved, the SCR denitrification efficiency is improved, the dust content of the mixture is reduced, and the ammonia emission exceeds the standard and catalyst waste is avoided.
Smart Images
Figure CN222871833U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of flue gas denitration and relates to an ammonia-air mixer using ammonia cyclone. Background Art
[0002] At present, in the field of flue gas denitrification, the SCR process occupies the main market. The SCR process uses ammonia as a reducing agent, and the process requires the concentration of ammonia to be <5%. Due to the safety hazards of ammonia, the source of ammonia at this stage generally chooses urea solution for hydrolysis reaction. The ammonia and water vapor mixture after hydrolysis is diluted with clean flue gas and sprayed into the SCR reactor. This dilution process requires an ammonia-air mixer to complete.
[0003] Whether ammonia and air can be mixed evenly has become an important factor affecting the SCR denitrification efficiency. Uneven mixing of ammonia and air will seriously affect the removal efficiency of nitrogen oxides and cause ammonia emissions to exceed the standard. It will also cause problems such as catalyst waste and dust accumulation, seriously affecting the economic operation of the unit. Moreover, with the increasingly severe environmental situation and the rise of ultra-low emissions, the requirements for ammonia-air mixers that can mix ammonia and air are very high. How to achieve more even mixing of ammonia and air has become a technical problem that technicians in this field need to solve. Utility Model Content
[0004] The utility model aims to overcome the above-mentioned shortcomings of the prior art and provides an ammonia-air mixer using ammonia cyclone, which can achieve uniform mixing of ammonia and air.
[0005] To achieve the above-mentioned purpose, the utility model discloses an ammonia-air mixer using ammonia cyclone, comprising a dilution air duct, a filter device, a cyclone device and a cyclone cylinder, the dilution air duct is connected to one end of the cyclone cylinder via the filter device and the cyclone device in sequence, a plurality of cyclone ammonia tubes are arranged on the side wall of the cyclone device, and a mixed gas outlet is arranged at the other end of the cyclone cylinder.
[0006] The cyclone cylinder includes a cylinder body, the dilution air duct is connected to one end of the filter device through the air duct flange, the other end of the filter device is connected to the dilution air inlet at one end of the cyclone device through the filter device flange, the outlet at the other end of the cyclone device is connected to one end of the cylinder body through the cyclone device flange and bolts, and the mixed gas outlet is arranged at the other end of the cylinder body.
[0007] An outlet flange is provided at the outlet of the mixed gas.
[0008] A dust collecting groove is arranged at the bottom of the cylinder body.
[0009] A plurality of rectangular holes are arranged at the bottom of the cylinder body, and the rectangular holes are directly opposite to the dust collecting groove.
[0010] The dust collecting tank is connected to the bottom of the cyclone cylinder through mounting bolts.
[0011] A detachable filter screen is installed in the filtering device.
[0012] The cyclone ammonia tubes are rotationally symmetrically distributed on the side of the cyclone device and are tangent to the cyclone device.
[0013] An electric regulating valve is installed on the dilution air duct.
[0014] A detection point is arranged at the mixed gas outlet.
[0015] The utility model has the following beneficial effects:
[0016] The ammonia-air mixer using ammonia cyclone described in the utility model forms an ammonia cyclone through the cyclone cylinder and the axially distributed cyclone ammonia tube during specific operation, and the dilution wind in the suction cylinder is sucked to form a mixed cyclone, thereby enhancing the mixing degree of ammonia and dilution wind and improving the uniformity of the mixed gas. While ensuring good mixing, dust is separated by the centrifugal action of the cyclone, the dust content of the mixed gas is reduced, and the uniform mixing of ammonia and air is achieved. The utility model has a simple structure, is easy to operate, and is extremely practical. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 It is a structural diagram of the utility model;
[0018] Figure 2 It is a cross-sectional view of the utility model;
[0019] Figure 3 FIG. 4 is an installation position diagram of the dust collecting tank 404 in the present utility model;
[0020] Figure 4a is a distribution diagram of the cyclone ammonia tube 301;
[0021] Figure 4b is another distribution diagram of the cyclone ammonia pipe 301;
[0022] Figure 4c This is another distribution diagram of the cyclone ammonia pipe 301.
[0023] Among them, 1 is the dilution air duct, 2 is the filtering device, 3 is the cyclone device, 4 is the cyclone cylinder, 101 is the air duct flange, 301 is the cyclone ammonia tube, 302 is the cyclone device flange, 303 is the bolt, 304 is the dilution air inlet, 305 is the filtering device flange, 401 is the cylinder body, 402 is the mixed gas outlet, 403 is the outlet flange, and 404 is the dust collecting tank. DETAILED DESCRIPTION
[0024] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is only an embodiment of a part of the utility model, not all embodiments, and is not intended to limit the scope of the disclosure of the utility model. In addition, in the following description, the description of known structures and technologies is omitted to avoid unnecessary confusion of the concepts disclosed in the utility model. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of protection of the utility model.
[0025] The accompanying drawings show schematic diagrams of structures according to the disclosed embodiments of the utility model. These figures are not drawn to scale, and some details are magnified and some details may be omitted for the purpose of clear expression. The shapes of various regions and layers shown in the figures and the relative sizes and positional relationships therebetween are only exemplary, and may deviate in practice due to manufacturing tolerances or technical limitations, and those skilled in the art may design regions / layers with different shapes, sizes, and relative positions according to actual needs.
[0026] refer to Figure 1 , Figure 2 and Figure 3 The ammonia-air mixer using ammonia cyclone of the utility model comprises a dilution air duct 1, a filter device 2, a cyclone device 3 and a cyclone cylinder 4;
[0027] The dilution air duct 1 is connected to the cyclone cylinder 4 through the filter device 2 and the cyclone device 3 in sequence, wherein the dilution air duct 1 is connected to one end of the filter device 2 through the air duct flange 101, and the other end of the filter device 2 is connected to the dilution air inlet 304 at one end of the cyclone device 3 through the filter device flange 305, and the outlet of the other end of the cyclone device 3 is connected to one end of the cylinder body 401 through the cyclone device flange 302 and the bolt 303, a plurality of cyclone ammonia tubes 301 are arranged on the side wall of the cyclone device 3, a mixed gas outlet 402 is arranged at the other end of the cylinder body 401, and an outlet flange 403 is arranged at the mixed gas outlet 402, a dust collecting groove 404 is arranged at the bottom of the cylinder body 401, and a plurality of rectangular hole grooves are arranged at the bottom of the cylinder body 401, and the rectangular hole grooves are directly opposite to the dust collecting groove 404.
[0028] In this embodiment, a detachable filter screen is installed in the filtering device 2 .
[0029] In this embodiment, the dilution air inlet 304 , the cyclone ammonia pipe 301 and the cyclone device flange 302 are all circular tube structures. Each cyclone ammonia pipe 301 is rotationally symmetrically distributed on the side of the cyclone device 3 and is tangent to the cyclone device 3 .
[0030] In this embodiment, the dust collecting groove 404 is connected to the bottom of the cyclone barrel 4 by installing bolts and is detachable, so as to facilitate cleaning of dust in the dust collecting groove 404.
[0031] In this embodiment, an electric regulating valve is installed on the dilution air duct 1 to adjust the dilution air volume to control the ammonia-air mixing ratio.
[0032] In this embodiment, a detection point is provided at the mixed gas outlet 402 for detecting the ratio of each component in the mixed gas.
[0033] During operation, the dilution air flows from the dilution air duct 1 through the filter device 2 and enters the cyclone cylinder 4 through the dilution air inlet 304. At the same time, the ammonia enters the cyclone cylinder 4 through the cyclone ammonia pipe 301, rotates in the cyclone cylinder 4 to generate a cyclone, and the dilution air in the cylinder is sucked in. The formed mixed air flow is sent out through the mixed air outlet 402. At the same time, during the rotation of the rotating air, the smoke and dust carried in the dilution air are separated due to the centrifugal force and collision, and fall into the dust collecting tank 404 at the bottom of the cyclone cylinder 4. Figure 4a , Figure 4b , Figure 4c As shown, the number of the cyclone ammonia pipes 301 is 2, 3 and 4, and the cyclone ammonia pipes 301 are rotationally symmetrically distributed on the cyclone device 3 .
[0034] It should be noted that the utility model forms an ammonia cyclone through the cyclone cylinder 4 and the axially distributed cyclone ammonia tube 301, and sucks the dilution air in the cylinder to form a mixed cyclone, thereby enhancing the mixing degree of ammonia and dilution air and improving the uniformity of the mixed gas. While ensuring good mixing, dust is separated by the centrifugal action of the cyclone to reduce the dust content of the mixed gas. In addition, the utility model connects several parts with flanges to facilitate disassembly and cleaning.
[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model is described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the utility model can still be modified or replaced by equivalents, and any modification or equivalent replacement that does not depart from the spirit and scope of the utility model should be included in the scope of protection of the claims of the utility model.
Claims
1. An ammonia-air mixer using ammonia cyclone, characterized in that: The invention comprises a dilution air duct (1), a filter device (2), a cyclone device (3) and a cyclone cylinder (4); the dilution air duct (1) is connected to one end of the cyclone cylinder (4) via the filter device (2) and the cyclone device (3) in sequence; a plurality of cyclone ammonia tubes (301) are arranged on the side wall of the cyclone device (3); and a mixed gas outlet (402) is arranged at the other end of the cyclone cylinder (4).
2. The ammonia-air mixer using ammonia cyclone according to claim 1, characterized in that: The cyclone cylinder (4) comprises a cylinder body (401), the dilution air duct (1) is connected to one end of the filter device (2) via an air duct flange (101), the other end of the filter device (2) is connected to a dilution air inlet (304) at one end of the cyclone device (3) via a filter device flange (305), the outlet at the other end of the cyclone device (3) is connected to one end of the cylinder body (401) via a cyclone device flange (302) and a bolt (303), and the mixed gas outlet (402) is arranged at the other end of the cylinder body (401).
3. The ammonia-air mixer using ammonia cyclone according to claim 2, characterized in that: An outlet flange (403) is provided at the mixed gas outlet (402).
4. The ammonia-air mixer using ammonia cyclone according to claim 2, characterized in that: A dust collecting groove (404) is provided at the bottom of the cylinder body (401).
5. The ammonia-air mixer using ammonia cyclone according to claim 4, characterized in that: The bottom of the cylinder body (401) is provided with a plurality of rectangular holes and slots, and the rectangular holes and slots are directly opposite to the dust collecting slot (404).
6. The ammonia-air mixer using ammonia cyclone according to claim 4, characterized in that: The dust collecting trough (404) is connected to the bottom of the cyclone cylinder (4) by means of mounting bolts.
7. The ammonia-air mixer using ammonia cyclone according to claim 1, characterized in that: A detachable filter screen is installed in the filtering device (2).
8. The ammonia-air mixer using ammonia cyclone according to claim 1, characterized in that: The cyclone ammonia pipes (301) are rotationally symmetrically distributed on the side of the cyclone device (3) and are tangent to the cyclone device (3).
9. The ammonia-air mixer using ammonia cyclone according to claim 1, characterized in that: An electric regulating valve is installed on the dilution air duct (1).
10. The ammonia-air mixer using ammonia cyclone according to claim 1, characterized in that: A detection point is provided at the mixed gas outlet (402).