Flue mixer for mixing flue gas and powder and flue gas treatment system

Abstract

The utility model belongs to the technical field of flue gas treatment systems, and particularly relates to a flue mixer for mixing flue gas and powder. The flue mixer for mixing the flue gas and the powder comprises an outer pipe and an inner pipe, the inner pipe comprises a large-diameter section, a slope section and a small-diameter section which are sequentially connected in the flue gas conveying direction. The periphery of the slope section is covered with a rotary shell, and a rotary cavity is formed between the rotary shell and the slope section. The outer pipe is arranged on the periphery of the small-caliber section, and a rotating cavity with one end open and the other end communicated with the rotary cavity is formed between the outer pipe and the small-caliber section. And a plurality of spiral motion guide vanes are arranged in the rotating cavity. According to the flue mixer for mixing the flue gas and the powder, materials to be pneumatically conveyed can be circumferentially dispersed in the rotary cavity and then enter the rotary cavity, the materials can enter the flue in a spiral motion mode through the multiple spiral motion guide vanes in the rotary cavity, the inner pipe is of a Venturi structure, and therefore the materials can be conveyed into the flue in a spiral motion mode. And the flue gas is disturbed at the outlet of the small-caliber section and violently collides with the spirally moving material, so that the flue gas is fully mixed.

Description

Technical Field

[0001] The utility model belongs to the technical field of flue gas treatment systems, and in particular relates to a flue mixer used for mixing flue gas and powder. Background Art

[0002] In flue gas treatment, dry deacidification is to spray lime powder or baking soda into the flue or dry deacidification tower to make it contact with acidic gas and react. Activated carbon injection can effectively remove air pollutants such as dioxins, VOCs, PAHs and heavy metal mercury in flue gas through the adsorption of activated carbon.

[0003] The traditional dry deacidification and activated carbon injection system uses a straight tube nozzle or a nozzle with a diffusion cone to spray powder (such as slaked lime, activated carbon or baking soda) into the flue. The powder cannot be fully mixed with the flue gas in the flue, and the deacidification and adsorption efficiency cannot be maximized, resulting in a waste of powder and failure to achieve maximum utilization. Utility Model Content

[0004] The utility model aims to provide a flue mixer for mixing flue gas and powder, so as to solve the technical problem that the powder cannot be fully mixed with the flue gas in the flue when a straight tube nozzle or a nozzle with a diffusion cone is used to spray powder into the flue in the prior art.

[0005] In order to solve the above technical problems, the utility model provides a flue mixer for mixing flue gas and powder, comprising: an outer tube and an inner tube;

[0006] The inner tube comprises a large-diameter section, a slope section and a small-diameter section which are sequentially connected along the smoke conveying direction;

[0007] The outer peripheral cover of the slope section is provided with a rotating shell, and a rotating cavity is formed between the rotating shell and the slope section;

[0008] The outer tube is arranged on the outer periphery of the small-diameter section, and a rotating cavity with an opening at one end and the other end connected to the rotating cavity is formed between the outer tube and the small-diameter section;

[0009] A plurality of spiral motion guide blades are arranged in the rotating cavity.

[0010] In one embodiment of the present application, a feed pipe communicating with the rotary chamber is provided on the rotary shell.

[0011] In one embodiment of the present application, the feed pipe is tangent to the outer pipe.

[0012] In one embodiment of the present application, the diameter of the outer tube is equal to the diameter of the large-diameter section.

[0013] In one embodiment of the present application, one end of the rotating shell is connected to the outer tube, and the other end is connected to the large-diameter section.

[0014] In one embodiment of the present application, the diameter of the rotating shell is greater than the diameter of the outer tube.

[0015] In one embodiment of the present application, the flue mixer for mixing flue gas and powder further comprises a first flange and a second flange; wherein

[0016] The first flange is connected to the end of the outer tube;

[0017] The second flange is connected to the end of the large-diameter section.

[0018] Correspondingly, the utility model also provides a flue gas treatment system, comprising: a flue, and a flue mixer as described above installed on the flue for mixing flue gas and powder.

[0019] The beneficial effect of the utility model is that the flue mixer for mixing flue gas and powder material of the utility model comprises: an outer tube and an inner tube; wherein the inner tube comprises a large-diameter section, a slope section and a small-diameter section connected in sequence along the direction of flue gas conveying; the outer peripheral cover of the slope section is provided with a rotating shell, and a rotating chamber is provided between the rotating shell and the slope section; the outer tube is arranged at the periphery of the small-diameter section, and a rotating chamber with an opening at one end and the other end connected to the rotating chamber is provided between the outer tube and the small-diameter section; a plurality of spiral motion guide blades are provided in the rotating chamber. In the flue mixer for mixing flue gas and powder material of the utility model, the pneumatically conveyed material can be dispersed circumferentially in the rotating chamber and then enter the rotating chamber, and the plurality of spiral motion guide blades in the rotating chamber can make the material enter the flue in a spiral motion, and the inner tube is a Venturi structure, so that the flue gas is disturbed at the outlet of the small-diameter section and collides violently with the spirally moving material, thereby being fully mixed.

[0020] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by practicing the utility model. The purpose and other advantages of the utility model are realized and obtained by the structures particularly pointed out in the description and the drawings.

[0021] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 This is a front view of a flue mixer for mixing flue gas and powder according to the utility model;

[0024] Figure 2 It is a side view of a flue mixer for mixing flue gas and powder material of the utility model;

[0025] Figure 3 yes Figure 2 Middle BB section view;

[0026] Figure 4 yes Figure 1 Middle AA section view;

[0027] Figure 5 It is a schematic diagram of smoke flow.

[0028] In the figure:

[0029] Outer tube 1, rotating chamber 11, spiral motion guide vane 12, inner tube 2, large-diameter section 21, slope section 22, small-diameter section 23, rotating shell 3, rotating chamber 31, feed pipe 4, first flange 5, second flange 6. DETAILED DESCRIPTION

[0030] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figures 1 to 4 In one embodiment of the present application, a flue mixer for mixing flue gas and powder comprises: an outer tube 1 and an inner tube 2; wherein the inner tube 2 comprises a large-diameter section 21, a slope section 22 and a small-diameter section 23 connected in sequence along the flue gas conveying direction; the outer peripheral cover of the slope section 22 is provided with a rotating shell 3, and a rotating chamber 31 is provided between the rotating shell 3 and the slope section 22; the outer tube 1 is arranged on the outer periphery of the small-diameter section 23, and a rotating chamber 11 with one end open and the other end connected to the rotating chamber 31 is provided between the outer tube 1 and the small-diameter section 23; a plurality of spiral motion guide blades 12 are provided in the rotating chamber 11.

[0032] In this embodiment, optionally, a feed pipe 4 communicating with the rotary chamber 31 is provided on the rotary shell 3 .

[0033] See also Figure 2 , Figure 3 , Figure 4 and Figure 5 In this embodiment, the feed pipe 4 can be connected to the conveying pipeline to convey the powder by pneumatic force; the conveying wind and the powder enter the rotating chamber 31 from the feed pipe 4 and make a circumferential rotating motion around the outer wall of the inner tube 2; then enter the rotating chamber 11 from the rotating chamber 31, and due to the guiding effect of multiple spiral motion guide blades 12, the conveying wind and the powder make a spiral motion in the process of moving forward; the inner tube 2 is shaped as a Venturi structure, and the smoke enters the inner tube 2 from the right end and flows out from the left end. The smoke is disturbed at the throat outlet of the inner tube 2 to form a vortex C, which collides violently with the spiral motion conveying wind and powder, thereby being fully mixed.

[0034] Preferably, the feed pipe 4 is tangent to the outer pipe 1 .

[0035] See also Figure 3 , the diameter of the outer tube 1 is equal to the diameter of the large-diameter section 21.

[0036] Optionally, one end of the rotary shell 3 is connected to the outer tube 1 , and the other end is connected to the large-diameter section 21 .

[0037] Optionally, the diameter of the rotating shell 3 is larger than the diameter of the outer tube 1, which can provide sufficient rotating space for conveying air and powder.

[0038] Referring to the figure, the flue mixer further comprises: a first flange 5 and a second flange 6 ; wherein the first flange 5 is connected to the end of the outer tube 1 ; and the second flange 6 is connected to the end of the large-diameter section 21 .

[0039] Correspondingly, based on the above embodiment, this embodiment further provides a flue gas treatment system, including: a flue, and a flue mixer installed on the flue for mixing flue gas and powder as described above.

[0040] In summary, the flue mixer of the utility model adopts a spiral motion guide blade 12, so that the injected conveying air and powder move in a spiral motion in the flue; the inner tube 2 is designed as a Venturi structure, so that the smoke is disturbed at the throat outlet, and violently collides with the spiral motion conveying wind and powder, thereby fully mixing, improving the deacidification and adsorption efficiency of the powder, saving the consumption of powder, and achieving the purpose of reducing costs and increasing efficiency.

[0041] In the description of the embodiments of the present invention, unless otherwise clearly specified and limited, 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.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, 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 understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0043] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without departing from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A flue mixer for mixing flue gas and powder, characterized in that: include: An outer tube (1) and an inner tube (2); wherein The inner tube (2) comprises a large-diameter section (21), a slope section (22) and a small-diameter section (23) which are sequentially connected along the smoke conveying direction; The outer peripheral cover of the slope section (22) is provided with a rotating shell (3), and a rotating chamber (31) is formed between the rotating shell (3) and the slope section (22); The outer tube (1) is arranged on the outer periphery of the small-diameter section (23); between the outer tube (1) and the small-diameter section (23) is a rotating chamber (11) with one end open and the other end connected to the rotating chamber (31); A plurality of helical motion guide blades (12) are arranged in the rotating chamber (11).

2. The flue mixer according to claim 1, characterized in that: The rotary shell (3) is provided with a feed pipe (4) which is in communication with the rotary chamber (31).

3. The flue mixer according to claim 2, characterized in that: The feed pipe (4) is tangent to the outer pipe (1).

4. The flue mixer according to claim 1, characterized in that: The diameter of the outer tube (1) is equal to the diameter of the large-diameter section (21).

5. The flue mixer according to claim 4, characterized in that: One end of the rotary shell (3) is connected to the outer tube (1), and the other end is connected to the large-diameter section (21).

6. The flue mixer according to claim 5, characterized in that: The diameter of the rotating shell (3) is greater than the diameter of the outer tube (1).

7. The flue mixer according to claim 1, characterized in that: Also includes: A first flange (5) and a second flange (6); wherein The first flange (5) is connected to the end of the outer tube (1); The second flange (6) is connected to the end of the large-diameter section (21).

8. A flue gas treatment system, characterized in that: include: A flue, and a flue mixer for mixing flue gas and powder as described in any one of claims 1 to 7 installed on the flue.

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