Drainage structure

Abstract

The utility model discloses a drainage structure which comprises a flue gas channel in a boiler, a drainage structure body is arranged in the channel, the section of the drainage structure body is in a water drop shape with a large head and a small tail, and the two ends of the drainage structure body are connected to the left side and the right side of the channel. The drainage structure body comprises a head structure, a tail structure, a front drainage face and a rear drainage face, the head structure and the tail structure are in smooth transition connection through the front drainage face and the rear drainage face, and a drainage structure center line used for reflecting the size of the drainage structure body is arranged in the drainage structure body. Both the front drainage surface and the rear drainage surface are smooth transition planes or arc surfaces, when a working medium flows through the drainage structure body, a directional drainage effect can be generated, perturbing and flowing resistance of the working medium can be reduced, meanwhile, the smooth transition planes or arc surfaces are not prone to dust accumulation, and under the condition of a certain working medium flow speed, the working medium is not prone to dust accumulation. The self-cleaning function is realized.

Description

Technical Field

[0001] This utility model relates to the field of flue gas diversion technology, and in particular to a diversion structure. Background Technology

[0002] In existing waste heat recovery systems, due to space constraints, boiler flues are typically not designed to be perfectly straight. The high-temperature working fluid often needs to undergo a 90° or even 180° turn before entering the next stage of flow. Achieving this turn within a limited space inevitably leads to fluid flow deviation. Uneven flow not only causes localized scouring and ash bridging within the flue, but can also affect the heat exchange efficiency of downstream heating surfaces. In short, boiler design aims to minimize working fluid flow deviation. One of the main measures currently implemented is to install flow-guiding structures within the flue to alleviate this phenomenon. Utility Model Content

[0003] The purpose of this invention is to solve the technical problems existing in the prior art and to provide a drainage structure.

[0004] To achieve the above objectives, the technical solution provided by this utility model is: a diversion structure, including a flue gas channel in a boiler, a diversion structure body disposed within the channel, the working fluid velocity within the channel being 3-15 m / s, the cross-section of the diversion structure body being a teardrop shape with a large head and a small tail, the two ends of the diversion structure body being connected to the front and rear sides of the channel, the diversion structure body including a head structure, a tail structure, a front diversion surface and a rear diversion surface, the front diversion surface and the rear diversion surface being both smoothly transitioned planes or arc surfaces, the head structure and the tail structure being smoothly connected through the front diversion surface and the rear diversion surface, the diversion structure body having a diversion structure centerline for reflecting the size of the diversion structure body, the diversion structure centerline being a straight line, the length of the diversion structure centerline being L, where L≤1m.

[0005] Furthermore, when the head structure and tail structure are arc-shaped, the arc radius of the head structure is R2, and the arc radius of the tail structure is R1, where R1≥0, R2>0, and R2>R1.

[0006] Furthermore, when the left side of the channel is the channel inlet and the right side of the channel is the channel outlet, the direction of flue gas flow in the channel is from the tail structure of the diversion structure body to the head structure of the diversion structure body.

[0007] Furthermore, when the left side of the channel is the channel outlet and the right side of the channel is the channel inlet, the direction of flue gas flow in the channel is from the head structure of the diversion structure to the tail structure of the diversion structure.

[0008] Furthermore, the angle between the main body of the drainage structure and the horizontal direction within the channel is the configuration angle b, where the configuration angle b ≥ 0.

[0009] Furthermore, the main body of the drainage structure can be solid or hollow. The insulation and anti-corrosion measures and materials for the main body of the drainage structure are selected according to the ambient temperature, including but not limited to refractory casting or the use of heat-resistant and corrosion-resistant materials.

[0010] The beneficial effects of this utility model are:

[0011] The flow-guiding structure body of this utility model includes a front flow-guiding surface and a rear flow-guiding surface. Both the front and rear flow-guiding surfaces are smooth transition planes or arc surfaces. When the working fluid flows through the flow-guiding structure body, it can generate a directional flow-guiding effect, which can reduce the working fluid turbulence and flow resistance. At the same time, the smooth transition planes or arc surfaces are not easy to accumulate dust, and under certain working fluid flow rate conditions, they have a self-cleaning function. Attached Figure Description

[0012] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0013] Figure 1 This is a schematic diagram of the overall structure of a preferred embodiment of the present invention;

[0014] Figure 2 This is a schematic diagram of the structure of the tail section of this utility model, where the radius of the arc is zero and the left side of the channel is the channel entrance;

[0015] Figure 3 This is a schematic diagram of the structure of the tail section of this utility model, where the radius of the arc is zero and the right side of the channel is the channel entrance.

[0016] Figure 4 This is a schematic diagram of the drainage structure body in this utility model being configured at angle b within the channel.

[0017] Attached image captions:

[0018] 1- Drainage structure body; 101- Front drainage surface; 102- Rear drainage surface; 2- Channel; 201- Channel inlet; 202- Channel outlet; 3- Center line of drainage structure. Detailed Implementation

[0019] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0020] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0021] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0022] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0023] Reference Figures 1-4 In a preferred embodiment of this utility model, a diversion structure includes a flue gas channel 2 inside a boiler, a diversion structure body 1 disposed inside the channel 2, the working fluid flow velocity inside the channel 2 being 3-15 m / s, the cross-section of the diversion structure body 1 along the working fluid flow direction being a teardrop shape with a large head and a small tail, the two ends of the diversion structure body 1 being connected to the front and rear sides of the channel 2, the diversion structure body 1 including a head structure, a tail structure, a front diversion surface 101 and a rear diversion surface 102, both the front diversion surface 101 and the rear diversion surface 102 being smooth transition planes or arc surfaces, the head structure and the tail structure being smoothly connected through the front diversion surface 101 and the rear diversion surface 102, the diversion structure body 1 having a diversion structure centerline 3 for reflecting the size of the diversion structure body 1, the diversion structure centerline 3 being a straight line, the length of the diversion structure centerline 3 being L, L≤1m.

[0024] In this embodiment, as Figure 4 As shown, the drainage structure body 1 is set in the channel 2 at an angle b with the horizontal direction, where b ≥ 0. When the angle b is zero, the drainage structure body 1 is installed horizontally; when the angle b is greater than zero, the drainage structure body 1 is installed at an angle.

[0025] In this embodiment, the head structure and the tail structure are arc-shaped, with the arc radius of the head structure being R2 and the arc radius of the tail structure being R1, where R1≥0, R2>0, and R2>R1.

[0026] Furthermore, when the radius of the arc of the tail structure R1 = 0, the cross-section of the tail structure of the drainage structure body 1 is a sharp angle, such as... Figure 2 and Figure 3 As shown.

[0027] Specifically, when the working fluid flows through the main body of the diversion structure 1, the directional diversion effect can be generated by the setting of the front diversion surface 101 and the rear diversion surface 102, which can reduce the working fluid turbulence and flow resistance. At the same time, the smooth transition plane or arc surface is not easy to accumulate dust, and has a self-cleaning function under certain working fluid flow rate conditions.

[0028] In this embodiment, when the left side of channel 2 is channel inlet 201 and the right side of channel 2 is channel outlet 202, the direction of flue gas flow in channel 2 is from the tail structure of the diversion structure body 1 to the head structure of the diversion structure body 1.

[0029] Preferably, when the left side of channel 2 is channel outlet 202 and the right side of channel 2 is channel inlet 201, the direction of flue gas flow in channel 2 is from the head structure of the diversion structure body 1 to the tail structure of the diversion structure body 1.

[0030] In this embodiment, the heat preservation and anti-corrosion measures and materials of the drainage structure body 1 are selected according to the ambient temperature, including but not limited to refractory casting or the use of heat-resistant and corrosion-resistant materials. In this utility model, a layer of refractory castable is used for protection. In some embodiments, heat-resistant and corrosion-resistant materials can also be used directly.

[0031] Specifically, the drainage structure body 1 of this utility model adopts a hollow structure. The advantage of doing so is that it can reduce the overall weight of the drainage structure body 1. At the same time, the hollow part of the drainage structure body 1 can be connected with the external environment to achieve natural or forced ventilation for cooling.

[0032] Without causing conflict, those skilled in the art can freely combine and use the above-mentioned additional technical features.

[0033] The above description is only a preferred embodiment of the present utility model. Any technical solution that achieves the purpose of the present utility model by essentially the same means shall fall within the protection scope of the present utility model.

Claims

1. A drainage structure, characterized in that: The passage (2) includes the flue gas in the boiler. The passage (2) is equipped with a diversion structure body (1). The working fluid velocity in the passage (2) is 3~15m / s. The cross-section of the diversion structure body (1) is a teardrop shape with a large head and a small tail. The two ends of the diversion structure body (1) are connected to the front and rear sides of the passage (2). The diversion structure body (1) includes a head structure, a tail structure, a front diversion surface (101) and a rear diversion surface (102). The front diversion surface (101) and the rear diversion surface (102) are both smooth transition planes or arc surfaces. The head structure and the tail structure are smoothly connected through the front diversion surface (101) and the rear diversion surface (102). The diversion structure body (1) has a diversion structure center line (3) to reflect the size of the diversion structure body (1). The diversion structure center line (3) is a straight line. The length of the diversion structure center line (3) is L, and L≤1m.

2. The drainage structure according to claim 1, characterized in that: When the head and tail structures are arc-shaped, the radius of the arc of the head structure is R2, and the radius of the arc of the tail structure is R1, where R1≥0, R2>0, and R2>R1.

3. The drainage structure according to claim 1, characterized in that: When the left side of the channel (2) is the channel inlet (201) and the right side of the channel (2) is the channel outlet (202), the direction of the flue gas flow in the channel (2) is from the tail structure of the diversion structure body (1) to the head structure of the diversion structure body (1).

4. The drainage structure according to claim 1, characterized in that: When the left side of the channel (2) is the channel outlet (202) and the right side of the channel (2) is the channel inlet (201), the direction of the flue gas flow in the channel (2) is from the head structure of the diversion structure body (1) to the tail structure of the diversion structure body (1).

5. The drainage structure of claim 1, wherein: The angle between the main body of the drainage structure (1) and the horizontal direction is set in the channel (2) as the configuration angle b, and the configuration angle b ≥ 0.

6. The drainage structure according to claim 1, characterized in that: The main body of the drainage structure (1) is a solid or hollow structure. The insulation and anti-corrosion measures and materials of the main body of the drainage structure (1) are selected according to the ambient temperature, including refractory casting or the use of heat-resistant and corrosion-resistant materials.

Images