CN210905612U

CN210905612U - Fluid uniform distributor and uniform distribution device thereof

Info

Publication number: CN210905612U
Application number: CN201921447311.7U
Authority: CN
Inventors: 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; 曹媛维
Original assignee: China Huanqiu Contracting and Engineering Corp
Current assignee: China Huanqiu Contracting and Engineering Corp
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-07-03
Anticipated expiration: 2029-08-30

Abstract

The utility model provides a fluid uniform distributor and a uniform distribution device thereof, the uniform distribution device comprises a frame body and a fluid uniform distributor arranged in the frame body, the fluid uniform distributor comprises a multi-stage header pipe, one end of a first-stage header pipe is a fluid inlet, and the downstream end of each previous-stage header pipe is vertically communicated with the middle part of a next-stage 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 utility model discloses can distribute first fluid evenly among each branch pipe, and the length of each branch pipe is less than framework length far away, and consequently the flow of fluid in the different fluid exit of branch pipe differs little, fluid equipartition ware can distribute the different positions in the framework with the fluid relatively evenly.

Description

Fluid uniform distributor and uniform distribution device thereof

Technical Field

The utility model relates to a fluid uniform distributor and equipartition device thereof, in particular to denitration reductant distribution device and denitration reductant distribution pipe who uses in the ethylene cracking furnace convection current section.

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.

SUMMERY OF THE UTILITY MODEL

The utility model provides a fluid uniform distributor and equipartition device thereof mainly mixes the above-mentioned problem such as long and module side wall trompil many with the flue gas for denitration reductant among solving current ethylene cracking furnace deNOx systems. The utility model discloses other occasions that need the fluid equipartition also can be applied to.

In order to achieve the above object, the utility model adopts the following technical scheme:

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 enlarged surface pipes are arranged in the frame body at the downstream position relative to the fluid uniform distributor, and the light pipes or the enlarged surface pipes 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 flow uniform distribution device comprises a flow guide device arranged in the frame body and opposite to the upstream of the flow uniform distributor, and an included angle β formed between the flow guide device and the flow direction of the second fluid is in a 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 utility model discloses the beneficial effect who has is: 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 structure view of a fluid uniform distribution device provided by the present invention;

FIGS. 2 and 3 are enlarged views of a circle in a region A and a circle in a region B of FIG. 1;

FIG. 4 is an enlarged schematic view of the fluid outlet;

fig. 5 is a sectional structural view of another angle of the fluid distribution apparatus provided by the present 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 5, 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. 5) at an upstream of the fluid uniform distribution device in the frame 1, a plurality of gas mixing units 6 are arranged in the frame 1 at a downstream position 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., undergoes a denitration reduction reaction) through disturbance of the fluid uniform distribution device and stirring of the gas mixing units 6, and then flows out from a mixing outlet 12 at a 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 figures 1 and 2) or staggered in a region (as shown in figures 1 and 3);

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. 4 and 5, 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.

Claims

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;

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;

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 enlarged surface pipes are arranged in the frame body at the downstream position relative to the fluid uniform distributor, and the light pipes or the enlarged surface pipes are arranged side by side or in a staggered manner vertical to the flow direction of the second fluid.

10. The apparatus of claim 7, wherein the frame includes a flow guide device upstream of the flow distributor, the flow guide device being at an angle β with respect to the direction of flow of the second fluid within the range of [0 °, 60 ° ].

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 ].