阅读说明：本技术 流体均布器及其均布装置 (Fluid uniform distributor and uniform distribution device thereof ) 是由 杨庆兰 李锦辉 孙长庚 隋建伟 张来勇 李春燕 王国峰 黄佳平 武欣宇 刘建国 于 2019-08-30 设计创作，主要内容包括：本发明提供一种流体均布器及其均布装置,所述均布装置包括框体以及布置在框体内的流体均布器,所述流体均布器包括多级总管,第一级总管的一端为流体入口,每个上一级总管的下游端垂直连通于下一级总管的中部而呈T形；最后一级总管沿其长度方向垂直连通有数根支管的中部,各最后一级总管连通的支管的数量与相对位置均相同,每个支管上开设有数个流体出口。本发明可将第一流体均匀地分配到各支管中,而各支管的长度远远小于框体长度,因此流体在支管的不同流体出口处的流量相差不大,所述流体均布器能够将流体相对均匀地分布至框体内的不同位置。(The invention provides a fluid uniform distributor and a uniform distribution device thereof, wherein the uniform distribution device comprises a frame body and the fluid uniform distributor arranged in the frame body, the fluid uniform distributor comprises a plurality of stages of header pipes, one end of a first stage of header pipe is a fluid inlet, and the downstream end of each previous stage of header pipe is vertically communicated with the middle part of a next stage of header pipe to form a T shape; the last-stage main pipe is vertically communicated with the middle parts of a plurality of branch pipes along the length direction of the last-stage main pipe, the number and the relative position of the branch pipes communicated with each last-stage main pipe are the same, and a plurality of fluid outlets are formed in each branch pipe. The invention can uniformly distribute the first fluid into each branch pipe, and the length of each branch pipe is far less than that of the frame body, so that the flow rate difference of the fluid at different fluid outlets of the branch pipes is not large, and the fluid uniform distributor can relatively uniformly distribute the fluid to different positions in the frame body.)

1. A fluid uniform distributor is characterized in that: the multi-stage main pipe comprises a multi-stage main pipe, wherein one end of a first stage main pipe is a fluid inlet, and the downstream end of each upper stage main pipe is vertically communicated with the middle part of a lower stage main pipe to form a T shape;

the last-stage main pipe is vertically communicated with the middle parts of a plurality of branch pipes along the length direction of the last-stage main pipe, the number and the relative position of the branch pipes communicated with each last-stage main pipe are the same, and a plurality of fluid outlets are formed in each branch pipe.

2. The fluid applicator of claim 1, wherein: the number and relative positions of the fluid outlets on each branch pipe are the same.

3. The fluid applicator of claim 1, wherein: the fluid outlets on the branch pipes of the partial areas are arranged side by side or staggered.

4. The fluid applicator of claim 1, wherein: the channel of the final-stage header pipe has a taper angle from the center to both ends, so that the cross-sectional area of the channel is gradually increased from the center to both ends.

5. The fluid applicator of claim 1, wherein: the main pipes and the branch pipes at all levels are in a straight pipe shape or in a bent pipe shape with mirror symmetry or central symmetry.

6. The fluid applicator of claim 1, wherein: the cross sections of the main pipes and the branch pipes of each stage, which are vertical to the length direction of the pipes, are circular or polygonal.

7. A fluid applicator comprising a frame and the fluid applicator of any one of claims 1-6 disposed within the frame;

the upstream of framework is equipped with the second fluid import, and the downstream of framework is equipped with the mixed export.

8. The fluid distribution apparatus of claim 7, wherein: and a plurality of gas mixing units are arranged in the frame body at downstream positions relative to the fluid uniform distributor, and each gas mixing unit is provided with 4-6 non-rotatable streamline blades.

9. The fluid distribution apparatus of claim 7, wherein: and a plurality of rows of gas mixing units consisting of light pipes or surface enlarging pipes are arranged at the downstream position in the frame body relative to the fluid uniform distributor, and the pipe rows are arranged side by side or in a staggered manner vertical to the flow direction of the second fluid.

10. The fluid distribution apparatus of claim 7, wherein: the upstream of the fluid uniform distributor in the frame body is provided with a flow guide device, the flow guide device and the flow direction of the second fluid form an included angle beta, and the beta is in the range of [0 degrees ], 60 degrees ].

11. The fluid distribution apparatus of claim 7, wherein: the fluid outlets on the branch pipes of the fluid uniform distributor are positioned on the side walls of the branch pipes, the central line of each fluid outlet is opposite to the inflow direction of the second fluid inlet and has an included angle gamma, and the gamma is in the range of [0 degrees, 175 degrees ].

Technical Field

The invention relates to a fluid uniform distributor and a uniform distribution device thereof, in particular to a denitration reducing agent distribution device and a denitration reducing agent distribution pipe thereof used in a convection section of an ethylene cracking furnace.

Background

A large amount of NOx and N are generated in the ethylene cracking furnace₂And O. NOx is one of the main pollutants forming acid rain and acid mist, and N₂O destroys the ozone layer in the atmosphere stratosphere. Therefore, denitration treatment of the flue gas of the ethylene cracking furnace is required.

In the existing denitration system of the ethylene cracking furnace, a denitration reducing agent is introduced into a module from a nozzle of a fluid introduction device and is mixed with flue gas containing NOx from the upstream of the module, the flue gas and the reducing agent can be uniformly mixed only by 6 to 7 meters, and the denitration reducing agent is close to an injection opening of the module, so that the height of a convection section of the ethylene cracking furnace and the number of holes formed in a side wall of the module are increased, the investment of the ethylene cracking furnace is increased, and the thermal efficiency is reduced.

Disclosure of Invention

The invention provides a fluid uniform distributor and a uniform distribution device thereof, and mainly solves the problems that a denitration reducing agent and flue gas in a denitration system of an existing ethylene cracking furnace are long in mixing distance, a side wall of a module is provided with a plurality of holes, and the like. The invention can also be applied to other occasions requiring uniform distribution of fluid.

In order to achieve the purpose, the invention adopts the technical scheme that:

a fluid uniform distributor is characterized in that: the multi-stage main pipe comprises a multi-stage main pipe, wherein one end of a first stage main pipe is a fluid inlet, and the downstream end of each upper stage main pipe is vertically communicated with the middle part of a lower stage main pipe to form a T shape;

the last-stage main pipe is vertically communicated with the middle parts of a plurality of branch pipes along the length direction of the last-stage main pipe, the number and the relative position of the branch pipes communicated with each last-stage main pipe are the same, and a plurality of fluid outlets are formed in each branch pipe.

The fluid equipartition ware, wherein: the number and relative positions of the fluid outlets on each branch pipe are the same.

The fluid equipartition ware, wherein: the fluid outlets on the branch pipes of the partial areas are arranged side by side or staggered.

The fluid equipartition ware, wherein: the channel of the final-stage header pipe has a taper angle from the center to both ends, so that the cross-sectional area of the channel is gradually increased from the center to both ends.

The fluid equipartition ware, wherein: the main pipes and the branch pipes at all levels are in a straight pipe shape or in a bent pipe shape with mirror symmetry or central symmetry.

The fluid equipartition ware, wherein: the cross sections of the main pipes and the branch pipes of each stage, which are vertical to the length direction of the pipes, are circular or polygonal.

A fluid uniform distribution device is characterized by comprising a frame body and the fluid uniform distributor arranged in the frame body;

the upstream of framework is equipped with the second fluid import, and the downstream of framework is equipped with the mixed export.

The fluid equipartition device, wherein: and a plurality of rows of gas mixing units consisting of light pipes or surface enlarging pipes are arranged at the downstream position in the frame body relative to the fluid uniform distributor, and the pipe rows are arranged side by side or in a staggered manner vertical to the flow direction of the second fluid.

The fluid equipartition device, wherein: and a plurality of gas mixing units are arranged in the frame body at downstream positions relative to the fluid uniform distributor, and each gas mixing unit is provided with 4-6 non-rotatable streamline blades.

The fluid equipartition device, wherein: the upstream of the fluid uniform distributor in the frame body is provided with a flow guide device, the flow guide device and the flow direction of the second fluid form an included angle beta, and the beta is in the range of [0 degrees ], 60 degrees ].

The fluid equipartition device, wherein: the fluid outlets on the branch pipes of the fluid uniform distributor are positioned on the side walls of the branch pipes, the central line of each fluid outlet is opposite to the inflow direction of the second fluid inlet and has an included angle gamma, and the gamma is in the range of [0 degrees, 175 degrees ].

Compared with the prior art, the invention has the beneficial effects that: when fluid enters from the fluid inlet of the first-stage main pipe, the fluid is uniformly divided into two paths in the second-stage main pipe, then is uniformly divided into four paths in the third-stage main pipe, … … and the like, and finally is uniformly distributed into the branch pipes. Meanwhile, the number of header pipes of the fluid distributor for the first fluid to enter the frame body is greatly reduced, the damage to the heat-resisting wall of the frame body is reduced, and compared with other fluid distribution devices, the heat loss of the industrial furnace is reduced, and the heat efficiency is improved.

Drawings

FIG. 1 is a schematic front sectional view of a fluid distribution apparatus provided by the present invention;

FIGS. 1A and 1B are enlarged views of a circle in a region A and a circle in a region B of FIG. 1;

FIG. 2 is an enlarged schematic view of the fluid outlet;

fig. 3 is a sectional structural view of another angle of the fluid uniform distribution device provided by the invention.

Description of reference numerals: a frame body 1; a second fluid inlet 11; a mixing outlet 12; a branch pipe 2; a header pipe 3; a fluid outlet 4; a cone angle 5; a gas mixing unit 6; a region A; a region B; the angle gamma.

Detailed Description

Some specific embodiments of the invention will be described in detail below, by way of example and not by way of limitation, with reference to the accompanying drawings. The same reference numbers in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale.

As shown in fig. 1 and 3, a fluid uniform distribution device is provided in a frame 1 (e.g., a convection section of an industrial furnace), the fluid uniform distribution device is used for introducing a first fluid (e.g., a denitration reducing agent) into the frame 1, a second fluid (e.g., flue gas containing NOx) enters the frame 1 (e.g., a second fluid inlet 11 in fig. 3) at the upstream of the fluid uniform distribution device in the frame 1, a plurality of gas mixing units 7 are arranged in the frame 1 at downstream positions relative to the fluid uniform distribution device, the first fluid is introduced into the frame 1 from the fluid uniform distribution device, is rapidly mixed with the second fluid (e.g., a denitration reduction reaction occurs) through disturbance of the fluid uniform distribution device and stirring of the gas mixing units 7, and then flows out from a mixing outlet 12 at the downstream of the frame 1. With this structure, the mixing distance can be shortened.

The fluid uniform distributor mainly comprises a multi-stage header pipe 3, wherein one end of a first-stage header pipe 3 is a fluid inlet, the other end of the first-stage header pipe 3 extends into a frame body 1, the tail end of the first-stage header pipe extends into the middle of a second-stage header pipe 3 vertically to form a T shape, the two ends of the second-stage header pipe 3 are respectively and vertically communicated with the middle of a third-stage header pipe 3 to form a T shape, and the like, so that the number of the header pipes 3 at each stage is in an exponential series ascending trend of 1, 2, 4 and 8 … …;

the last-stage header pipe 3 is vertically communicated with the middle parts of a plurality of branch pipes 2 along the length direction, the number and the relative positions of the branch pipes 2 communicated with each last-stage header pipe 3 are the same, each branch pipe 2 is provided with a fluid outlet 4 with the same number and relative positions, and the fluid outlets 4 can be arranged side by side in a region (as shown in fig. 1 and fig. 1A) or staggered in a region (as shown in fig. 1 and fig. 1B);

in order to relatively average the flow of the first fluid flowing from the final stage manifold 3 into the branch pipes 2, the passage of the final stage manifold 3 has a taper angle 5 from the center to both ends so that the cross-sectional area thereof becomes gradually larger from the center to both ends.

Thus, when a first fluid enters from a fluid inlet of the first-stage header pipe 3, the first fluid is uniformly divided into two paths in the second-stage header pipe 3, then is uniformly divided into four paths in the third-stage header pipe 3, … … and the like, and finally is uniformly distributed into the branch pipes 2, because the length of each branch pipe 2 is far smaller than that of the frame body 1 due to the adoption of the structure of the header pipe 3, the flow difference of the fluid at different fluid outlets 4 of the branch pipes 2 is small, and therefore the fluid uniform distributor can relatively uniformly discharge the first fluid to different positions in the frame body 1.

As shown in fig. 2 and 3, the fluid outlets 4 on the branch pipe 2 are positioned on the side wall of the branch pipe 2, the central line of each fluid outlet 4 is opposite to the inflow direction of the second fluid inlet and has an included angle γ, γ is in the range of [0 °, 175 ° ]; and each of said gas mixing units 6 located at a position downstream of said branch pipes 2 has 4-6 non-rotatable streamline vanes; by means of the included angle gamma and the gas mixing unit 6, the denitration reducing agent and NOx in the flue gas can be quickly mixed.

In the above embodiment, the header pipes 3 and the branch pipes 2 of each stage are in the form of straight pipes, but actually, the header pipes 3 and the branch pipes 2 of each stage may be in the form of mirror-symmetrical or centrosymmetric bent pipes.

The foregoing description is intended to be illustrative rather than limiting, and it will be appreciated by those skilled in the art that many modifications, variations or equivalents may be made without departing from the spirit and scope of the invention as defined in the appended claims.