Gas-gas mixing device suitable for premixed combustion

Abstract

The utility model relates to a gas-gas mixing device suitable for premixed combustion. The device comprises a main pipe and a gas pipe, the gas pipe is installed on the main pipe and communicated with the main pipe, the device is structurally characterized by further comprising a disturbance assembly, the gas pipe and the disturbance assembly are sequentially arranged in the flowing direction, the disturbance assembly comprises a supporting plate and a baffle, the gas pipe comprises a vertical gas pipe body and a transverse gas pipe body, and the transverse gas pipe body is communicated with the supporting plate. The vertical gas pipe is communicated with the transverse gas pipe, the vertical gas pipe and the transverse gas pipe are perpendicularly welded, one end of the supporting plate is fixed to the inner wall of the main pipe, the baffle is obliquely fixed to the other end of the supporting plate, the baffle is of a triangular structure, the section of the main pipe is square, and the sections of the vertical gas pipe and the transverse gas pipe are round. The inner diameter of the vertical gas pipe is equal to that of the transverse gas pipe, and the vertical gas pipe is welded with the gas inlet flange.

Description

Technical Field

[0001] The utility model relates to a gas-gas mixing device suitable for premixed combustion. Background Art

[0002] Premixed combustion is a combustion method that evenly mixes gas and air before combustion. It has the characteristics of high combustion efficiency and energy saving. The mixing device is the key equipment in premixed combustion. In the premixed combustion system, the performance of the mixing device directly determines the quality of the premixing effect. The ideal mixing device should have efficient mixing ability to ensure even mixing of gas and air; at the same time, it should also have low resistance characteristics to reduce system energy consumption; in addition, high reliability is also an indispensable attribute to ensure that the mixing device is stable and reliable during continuous operation.

[0003] The mixing devices in the prior art mainly include Venturi type and small hole jet mixing type, which are generally complex in structure and high in manufacturing cost. The Venturi type mixer with an adjustment mechanism also has movable parts, which are easy to wear and increase the number of failure points. In addition, in order to obtain a better mixing effect, the existing mixing devices often use a larger medium flow rate. Coupled with the complex structure, the flow resistance is large, and a larger fan power is required, which increases energy consumption. Utility Model Content

[0004] The utility model aims to overcome the above-mentioned deficiencies in the prior art and to provide a gas-gas mixing device which has reasonable structural design, uniform mixing, small resistance, safety and reliability and is suitable for premixed combustion.

[0005] The technical solution adopted by the utility model to solve the above-mentioned problem is: the gas-gas mixing device suitable for premixed combustion includes a main pipe and a gas pipe, the gas pipe is installed on the main pipe, and the gas pipe is connected to the main pipe, and its structural characteristics are: it also includes a disturbance component, the gas pipe and the disturbance component are arranged in sequence along the flow direction, the disturbance component includes a support plate and a baffle, the gas pipe includes a vertical gas pipe and a horizontal gas pipe, the vertical gas pipe is connected to the horizontal gas pipe, and the vertical gas pipe is vertically welded to the horizontal gas pipe, one end of the support plate is fixed to the inner wall of the main pipe, the baffle is obliquely fixed to the other end of the support plate, and the baffle is arranged in a triangular structure.

[0006] Furthermore, the cross section of the main pipe is square.

[0007] Furthermore, the cross-sections of the vertical gas pipe and the horizontal gas pipe are circular, and the inner diameter of the vertical gas pipe is equal to the inner diameter of the horizontal gas pipe.

[0008] Furthermore, the vertical gas pipe is welded to the gas inlet flange.

[0009] Furthermore, the center line of the horizontal gas pipe coincides with the center line of the main pipe, and the outlet of the horizontal gas pipe faces the outlet of the main pipe, and the vertical gas pipe passes through one of the four surfaces on the main pipe.

[0010] Furthermore, the baffle is arranged in an isosceles triangle structure, the vertex of the baffle coincides with the center line of the main pipe, and the bottom edge of the baffle faces the outlet of the main pipe.

[0011] Furthermore, the distance between the vertex of the baffle and the outlet of the horizontal gas pipe is S, the inner diameter of the horizontal gas pipe is d, and the ratio of S to d is in the range of 1.6 to 2.5.

[0012] Furthermore, the included angle between the baffle and the horizontal plane is α, and α is between 20° and 30°.

[0013] Compared with the prior art, the utility model has the following advantages:

[0014] 1. Air enters from one end of the main pipe, gas enters the vertical gas pipe from the gas inlet flange, and is ejected from the outlet of the horizontal gas pipe. The air and gas flush the baffle in the same direction, forming a vortex behind the baffle, causing violent disturbance, short mixing time and good mixing effect.

[0015] 2. The disturbance component is only a triangular baffle with simple structure and small resistance.

[0016] 3. All parts are welded together, with no moving parts, so it is firm, reliable and durable.

[0017] 4. The overall structure is simple and the manufacturing cost is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the main structure of the gas-gas mixing device of an embodiment of the utility model.

[0019] Figure 2 yes Figure 1 Schematic diagram of the AA section structure.

[0020] Figure 3 yes Figure 1 Schematic diagram of the BB cross-section structure.

[0021] In the figure: main pipe 1, gas inlet flange 2, vertical gas pipe 3, horizontal gas pipe 4, support plate 5, baffle 6. DETAILED DESCRIPTION

[0022] The present invention will be further described in detail below with reference to the accompanying drawings and through examples. The following examples are provided to explain the present invention, but the present invention is not limited to the following examples.

[0023] Example

[0024] See also Figures 1 to 3 As shown, it should be noted that the structures, proportions, sizes, etc. illustrated in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the utility model, so they have no substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the utility model, should still fall within the scope of the technical content disclosed by the utility model. At the same time, if there are references to terms such as "upper", "lower", "left", "right", "middle" and "one" in this specification, they are only for the convenience of description, and are not used to limit the scope of the implementation of the utility model. The change or adjustment of their relative relationship, without substantially changing the technical content, should also be regarded as the scope of the implementation of the utility model.

[0025] The gas-gas mixing device suitable for premixed combustion in this embodiment includes a main pipe 1, a gas pipe and a disturbance component. The gas pipe is installed on the main pipe 1 and is connected to the main pipe 1. The gas pipe and the disturbance component are arranged in sequence along the flow direction.

[0026] The disturbance component includes a support plate 5 and a baffle 6. The gas pipe includes a vertical gas pipe 3 and a horizontal gas pipe 4. The vertical gas pipe 3 is connected to the horizontal gas pipe 4. The vertical gas pipe 3 is welded to the gas inlet flange 2, and the vertical gas pipe 3 is vertically welded to the horizontal gas pipe 4. One end of the support plate 5 is fixed to the inner wall of the main pipe 1, and the baffle 6 is obliquely fixed to the other end of the support plate 5. The baffle 6 is arranged in a triangular structure.

[0027] The cross-section of the main pipe 1 is square, the cross-sections of the vertical gas pipe 3 and the horizontal gas pipe 4 are circular, and the inner diameter of the vertical gas pipe 3 is equal to the inner diameter of the horizontal gas pipe 4, the center line of the horizontal gas pipe 4 coincides with the center line of the main pipe 1, and the outlet of the horizontal gas pipe 4 faces the outlet of the main pipe 1, and the vertical gas pipe 3 passes through one of the four faces on the main pipe 1.

[0028] The baffle 6 is set as an isosceles triangle structure, the vertex of the baffle 6 coincides with the center line of the main pipe 1, the bottom edge of the baffle 6 faces the outlet of the main pipe 1, the distance between the vertex of the baffle 6 and the outlet of the horizontal gas pipe 4 is S, the inner diameter of the horizontal gas pipe 4 is d, the ratio of S to d is in the range of 1.6 to 2.5, the angle between the baffle 6 and the horizontal plane is α, α is between 20° and 30°, where d is the diameter of the gas pipeline, which is generally calculated in the industry based on the gas flow rate and the recommended gas flow rate.

[0029] Each part is made of metal materials such as carbon steel, stainless steel or aluminum plate, and is connected by welding.

[0030] Air enters from the inlet of the main pipe 1, and gas enters the vertical gas pipe 3 from the gas inlet flange 2 and is ejected from the outlet of the horizontal gas pipe 4. The air and gas flush the baffle 6 in the same direction, forming a vortex behind the baffle 6, causing violent disturbance, so that the air and gas are evenly mixed, and the mixed gas is sent to the combustion chamber for combustion.

[0031] In addition, it should be noted that the shapes and names of the parts and components of the specific embodiments described in this specification may be different, and the above content described in this specification is only an example of the structure of the utility model. All equivalent changes or simple changes made based on the structure, features and principles described in the patent concept of the utility model are included in the protection scope of the utility model patent. Technicians in the technical field of the utility model can make various modifications or supplements to the specific embodiments described or replace them in a similar manner, as long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the protection scope of the utility model.

Claims

1. A gas-gas mixing device suitable for premixed combustion, comprising a main pipe (1) and a gas pipe, wherein the gas pipe is mounted on the main pipe (1) and the gas pipe is connected to the main pipe (1), characterized in that: The gas pipe and the disturbance component are arranged in sequence along the flow direction, the disturbance component comprises a support plate (5) and a baffle (6), the gas pipe comprises a vertical gas pipe (3) and a horizontal gas pipe (4), the vertical gas pipe (3) is connected to the horizontal gas pipe (4), and the vertical gas pipe (3) and the horizontal gas pipe (4) are vertically welded, one end of the support plate (5) is fixed to the inner wall of the main pipe (1), and the baffle (6) is obliquely fixed to the other end of the support plate (5), and the baffle (6) is arranged in a triangular structure.

2. The gas-gas mixing device suitable for premixed combustion according to claim 1, characterized in that: The cross section of the main pipe (1) is a square.

3. The gas-gas mixing device suitable for premixed combustion according to claim 1, characterized in that: The cross-sections of the vertical gas pipe (3) and the horizontal gas pipe (4) are circular, and the inner diameter of the vertical gas pipe (3) is equal to the inner diameter of the horizontal gas pipe (4).

4. The gas-gas mixing device suitable for premixed combustion according to claim 1, characterized in that: The vertical gas pipe (3) is welded to the gas inlet flange (2).

5. The gas-gas mixing device suitable for premixed combustion according to claim 1, characterized in that: The center line of the horizontal gas pipe (4) coincides with the center line of the main pipe (1), and the outlet of the horizontal gas pipe (4) faces the outlet of the main pipe (1), and the vertical gas pipe (3) passes through one of the four surfaces on the main pipe (1).

6. The gas-gas mixing device suitable for premixed combustion according to claim 1, characterized in that: The baffle (6) is arranged in an isosceles triangle structure, the vertex of the baffle (6) coincides with the center line of the main pipe (1), and the bottom edge of the baffle (6) faces the outlet of the main pipe (1).

7. The gas-gas mixing device suitable for premixed combustion according to claim 1, characterized in that: The distance between the vertex of the baffle (6) and the outlet of the horizontal gas pipe (4) is S, the inner diameter of the horizontal gas pipe (4) is d, and the ratio of S to d is in the range of 1.6 to 2.

5.

8. The gas-gas mixing device suitable for premixed combustion according to claim 1, characterized in that: The included angle between the baffle (6) and the horizontal plane is α, and α is between 20° and 30°.

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