Fluidized bed boiler denitration structure
By setting a spray gun on the top of the cyclone separator of the denitrification structure of the fluidized bed boiler, uniform mixing of urea solution and flue gas is achieved, the problem of uneven mixing in the prior art is solved, the amount of urea and input cost are reduced, and the smoothness and service life of the device are improved.
Patent Information
- Application Number
- CN202320529326.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-03-17
- Publication Date
- 2025-04-18
- Estimated Expiration
- 2033-03-17
AI Technical Summary
The existing denitrification structure of fluidized bed boilers leads to uneven mixing of urea solution and flue gas, which increases the amount of urea and the cost of input.
A fluidized bed boiler denitrification structure including a cyclone separator and a spray gun is designed. By setting two spray guns on the top of the cyclone separator, the spray gun is used in conjunction with the infusion tube, the external urea solution is inhaled and sprayed in the inner cavity of the cyclone separator, so that the urea solution and the flue gas are fully mixed.
The uniform mixing of urea solution and flue gas is achieved, which reduces the amount of urea, reduces the cost of investment, and improves the smoothness and service life of the device through the arrangement of bearings and protective shells.
Smart Images
Figure CN222766001U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of boiler denitration structure transformation, in particular to a fluidized bed boiler denitration structure. Background Art
[0002] Fluidized bed boilers are boilers that use fluidized bed combustion. Fluidized bed boilers can be divided into bubbling fluidized bed boilers and circulating fluidized bed boilers according to fluid dynamic characteristics. Fluidized bed boilers can be divided into normal pressure fluidized bed boilers and pressurized fluidized bed boilers according to the flue gas pressure in the furnace.
[0003] During the use of fluidized bed boilers, a denitrification structure is required. During the use of the existing denitrification structure, the urea solution and the flue gas are mixed unevenly, thereby increasing the amount of urea used and greatly increasing the investment cost. Utility Model Content
[0004] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a fluidized bed boiler denitrification structure, which achieves the advantage of uniform mixing and solves the problem that the existing denitrification structure causes uneven mixing of urea solution and flue gas during use, thereby increasing the amount of urea and greatly increasing the investment cost.
[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a fluidized bed boiler denitrification structure, including a cyclone separator and a spray gun, an air inlet is opened at the top of the left side of the cyclone separator, an air guide pipe is inserted at the top of the cyclone separator, a threaded groove is opened at the top of the cyclone separator, discharge pipes are fixedly connected on both sides of the bottom of the cyclone separator, connecting blocks are fixedly connected to the bottom of both sides of the spray gun, and the threaded groove and the connecting block are fixedly connected by installing bolts.
[0006] Preferably, the inner cavity of the cyclone separator is provided with a rotating rod, and the surface of the rotating rod is fixedly connected with a spiral feeding blade.
[0007] Preferably, the bottom of the rotating rod is movably connected to a bearing, and the bottom of the bearing is fixedly connected to the bottom of the inner cavity of the cyclone separator.
[0008] Preferably, a protective shell is provided on the surface of the cyclone separator, and the protective shell is fixedly connected to the cyclone separator by fastening bolts.
[0009] Compared with the prior art, the utility model provides a fluidized bed boiler denitration structure, which has the following beneficial effects:
[0010] 1. The utility model provides two spray guns on the top of the cyclone separator, thereby solving the problem that the existing denitration structure causes uneven mixing of urea solution and flue gas during use, thereby increasing the amount of urea and greatly increasing the investment cost.
[0011] 2. The utility model achieves the purpose of auxiliary rotation through the setting of the bearing, which greatly improves the smoothness of the operation of the device. Through the setting of the protective shell, it is convenient to maintain the device in the inner cavity of the cyclone separator, which greatly improves the service life of the inner cavity device of the cyclone separator. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the structure of the utility model;
[0013] Figure 2 This is a cross-sectional view of a cyclone separator of the utility model;
[0014] Figure 3 It is an enlarged view of point A of the present utility model.
[0015] In the figure: 1. cyclone separator; 2. air inlet; 3. air guide pipe; 4. spray gun; 5. infusion pipe; 6. connecting block; 7. mounting bolt; 8. discharge pipe; 9. rotating rod; 10. threaded groove. DETAILED DESCRIPTION
[0016] The following is a further detailed description of the implementation of the present invention in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.
[0017] In the description of the present invention, unless otherwise specified, "multiple" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.
[0018] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" 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. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0019] See also Figure 1-3A fluidized bed boiler denitrification structure includes a cyclone separator 1 and a spray gun 4. An air inlet 2 is opened at the top of the left side of the cyclone separator 1, an air guide pipe 3 is inserted at the top of the cyclone separator 1, a threaded groove 10 is opened at the top of the cyclone separator 1, both sides of the bottom of the cyclone separator 1 are fixedly connected with a discharge pipe 8, the bottom of both sides of the spray gun 4 are fixedly connected with a connecting block 6, and the threaded groove 10 and the connecting block 6 are fixedly connected by mounting bolts 7.
[0020] The inner cavity of the cyclone separator 1 is provided with a rotating rod 9, and the surface of the rotating rod 9 is fixedly connected with a spiral feeding blade.
[0021] The bottom of the rotating rod 9 is movably connected to a bearing, and the bottom of the bearing is fixedly connected to the bottom of the inner cavity of the cyclone separator 1. The setting of the bearing achieves the purpose of auxiliary rotation, which greatly improves the smoothness of the operation of the device.
[0022] A protective shell is provided on the surface of the cyclone separator 1, and the protective shell is fixedly connected to the cyclone separator 1 by fastening bolts. The provision of the protective shell facilitates maintenance of the device in the inner cavity of the cyclone separator 1, thereby greatly improving the service life of the device in the inner cavity of the cyclone separator 1.
[0023] The working principle of the utility model is: first, when the flue gas is transported to the inner cavity of the cyclone separator 1 through the air inlet 2, the user starts the spray gun 4 through the external controller, and the external urea solution is sucked in through the spray gun 4 with the cooperation of the infusion tube 5, and the urea solution is sprayed in the inner cavity of the cyclone separator 1, so that the urea solution and the flue gas are fully mixed, so as to achieve the purpose of ultra-low emission of nitrogen oxides in the flue gas.
[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.
Claims
1. A fluidized bed boiler denitration structure, comprising a cyclone separator (1) and a spray gun (4), characterized in that: An air inlet (2) is provided at the top of the left side of the cyclone separator (1), an air guide pipe (3) is inserted at the top of the cyclone separator (1), a threaded groove (10) is provided at the top of the cyclone separator (1), discharge pipes (8) are fixedly connected to both sides of the bottom of the cyclone separator (1), connecting blocks (6) are fixedly connected to the bottoms of both sides of the spray gun (4), the threaded groove (10) and the connecting block (6) are fixedly connected by mounting bolts (7), a rotating rod (9) is provided in the inner cavity of the cyclone separator (1), a spiral feeding blade is fixedly connected to the surface of the rotating rod (9), a bearing is movably connected to the bottom of the rotating rod (9), and the bottom of the bearing is fixedly connected to the bottom of the inner cavity of the cyclone separator (1), a protective shell is provided on the surface of the cyclone separator (1), and the protective shell and the cyclone separator (1) are fixedly connected by fastening bolts.