Flue ozone distributor applied in low-temperature oxidation denitrification technology and arrangement manner thereof

Abstract

A flue ozone distributor applied in a low-temperature oxidation denitrification technology and an arrangement manner thereof is disclosed. The flue ozone distributor comprises a distribution main pipe, multiple distribution branch pipes, Venturi distributors and delta wings. The distribution branch pipes are led out from the distribution main pipe as parallel branches. The Venturi distributors are arranged with an equal space on the distribution branch pipes. The delta wings are arranged on one diffusion segment side of the Venturi distributors. The flue ozone distributor is arranged in the flue. The technology is used in the field of denitrification for flue gas of an industrial boiler/kiln by a low-temperature ozone oxidation method. The ozone-injecting direction is consistent with a flow direction of the flue gas. A soot deposit congestion problem does not exist. A turbulent flow behavior of the flue gas and ozone is strengthened. The oxidation efficiency is improved.

Claims

1. A flue ozone distributor comprising: a flue; and a distribution main pipe (2), multiple distribution branch pipes (3), multiple Venturi distributors (4) and multiple delta wings (5), wherein the multiple distribution branch pipes (3) are led out from the distribution main pipe (2) as parallel branches, the multiple Venturi distributors (4) are arranged with an equal space with respect to each other on each of the distribution branch pipes (3) and the delta wings (5) are arranged on one diffusion segment side of the Venturi distributors (4), and wherein the flue ozone distributor is arranged in the flue such that a horizontal distance between an end of each of the distribution branch pipes (3) and a side wall of the flue (1) is of width of the flue (1), wherein an even number of groups of flue ozone distributors are symmetrically installed in dislocation on both sides of the flue (1) and the injected direction of the ozone through the flue ozone distributor is consistent with a flow direction of a flue gas.

2. The flue ozone distributor according to claim 1, wherein each of the distribution branch pipes (3) is divided into two segments, a front distribution branch pipe (3-1) segment is led out from the distribution main pipe (2) and is connected to a back distribution branch pipe (3-2) segment through a connecting flange (6).

3. The flue ozone distributor according to claim 1, wherein a control valve (7) is arranged on the front distribution branch pipe (3-1).

4. The flue ozone distributor according to claim 1, wherein spacing between adjacent distribution branch pipes (3) is equal.

5. The flue ozone distributor according to claim 1, wherein spacing between adjacent distribution branch pipes (3) is 300-500 mm.

6. The flue ozone distributor according to claim 1, wherein gas velocity in the distribution main pipe (2) is not greater than 30 m/s.

7. The flue ozone distributor according to claim 1, wherein gas velocity in the distribution branch pipes (3) is controlled to be 20-25 m/s.

8. The flue ozone distributor according to claim 1, wherein spacing between adjacent Venturi distributors (4) is 50-100 mm.

9. The flue ozone distributor according to claim 1, wherein each of the Venturi distributors (4) has a shrink angle of 70-90.

10. The flue ozone distributor according to claim 1, wherein each of the Venturi distributors (4) has a diffusion angle of 25-50.

11. The flue ozone distributor according to claim 1, wherein the ratio of height to diameter at the throat of each of the Venturi distributors (4) is 1.0-1.5.

12. The flue ozone distributor according to claim 1, wherein gas velocity at the throat of each of the Venturi distributors (4) is 8-12 m/s.

13. The flue ozone distributor according to claim 1, wherein the vertical distance between the diffusion segment of each of the Venturi distributors (4) and the corresponding delta wing (5) is 8-12 cm.

14. The flue ozone distributor according to claim 1, wherein the delta wing (5) on adjacent distributor branch pipes has a tilt angle of 90.

15. The flue ozone distributor according to claim 1, wherein each of the delta wings (5) has a section of an equilateral triangle, of which a diameter of the inscribed circle is 1.1-1.5 times of the outlet diameter of the diffusion segment of each of the Venturi distributors (4).

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a front view schematic of the flue ozone distributor structure of the present invention.

(2) FIG. 2 is a structure schematic of the delta wing in the flue ozone distributor of the present invention.

(3) FIG. 3 is a schematic of the connecting structure between the Venturi distributor and the delta wing in the flue ozone distributor of the present invention.

(4) FIG. 4 is a schematic of the flue equipped with the flue ozone distributor of the present invention.

(5) FIG. 5 is a side view schematic of the arrangement mode of two sets of the flue ozone distributors in the flue of the present invention.

(6) Reference numbers for each part in the drawings are as follows: 1flue; 2distribution main pipe; 3distribution branch pipe; 3-1front distribution branch pipe; 3-2back distribution branch pipe; 4Venturi distributor; 5delta wing; 6connecting flange; 7control valve.

(7) Hereinafter, the present invention is described in further detail. However, the following examples are merely simple examples of the present invention; they do not represent or limit the protection scope of the present invention. The protection scope of the present invention is defined by the appending claims.

EMBODIMENTS

(8) The technical solution of the present invention is illustrated by specific embodiments in conjunction with the drawings.

(9) In order to illustrate the present invention better and to facilitate understanding the technical solutions of the present invention, typical but non-limiting embodiments of the present invention are as follows:

Example 1

(10) A flue ozone distributor, the flue ozone distributor comprises a distribution main pipe, multiple distribution branch pipes, multiple Venturi distributors and multiple delta wings; the multiple distribution branch pipes are led out from the distribution main pipe as parallel branches; the multiple Venturi distributors are arranged with an equal space on the distribution branch pipe; the delta wings are arranged on one diffusion segment side of the Venturi distributor.

(11) When the flue ozone distributor is arranged in the flue, the horizontal distance between the end of the distribution branch pipe and side wall of the flue is of width of the flue, an even number of groups of flue ozone distributors are symmetrically installed in dislocation on both sides of the flue; the injected direction of the ozone through the flue ozone distributor is consistent with the flow direction of the flue gas.

Example 2

(12) FIGS. 1 through 3 show a flue ozone distributor, wherein the flue ozone distributor comprises a distribution main pipe 2, multiple distribution branch pipes 3, multiple Venturi distributors 4 and multiple delta wings 5; the multiple distribution branch pipes 3 are led out from the distribution main pipe 2 as parallel branches; the multiple Venturi distributors 4 are arranged with equal spacing on the distribution branch pipe 3; the delta wings 5 are arranged on one diffusion section side of the Venturi distributor 4.

(13) The distribution branch pipe 3 is divided into two segments, the front distribution branch pipe 3-1 segment is led out from distribution main pipe 2 and is connected to the back distribution branch pipe 3-2 segment by a connecting flange 6; a control valve 7 is arranged on the distribution branch pipe 3-1, thus the amount of the introduced ozone may be adjusted depending on the concentration of NO in the flue gas. Spacing between the adjacent distribution branch pipes 3 is equal; spacing between the adjacent branch pipes 3 is 500 mm.

(14) Selection of pipe diameters of the distribution main pipe 2 and the distribution branch pipe 3 is determined according to the gas velocity in the pipes. Gas velocity in the distribution main pipe 2 is 30 m/s; and gas velocity in the distribution branch pipe 3 is controlled to be 25 m/s.

(15) Spacing between the adjacent Venturi distributors 4 is 100 mm.

(16) The Venturi distributor 4 has a shrink angle of 90 and has a diffusion angle of 50.

(17) Ratio of height to diameter at the throat of the Venturi distributor 4 is 1.5; gas velocity at the throat of the Venturi distributor 4 is 12 m/s.

(18) The vertical distance between the diffusion segment of the Venturi distributor 4 and the corresponding delta wing 5 is 12 cm; the delta wing 5 on the adjacent distributor branch pipes has a tilt angle of 90. This design can increase the distribution region of the ozone, and strengthen the mixing effect of the ozone and the flue gas.

(19) The delta wing 5 has a section of an equilateral triangle, of which a diameter of the inscribed circle is 1.5 times of the outlet diameter of the diffusion segment of the Venturi distributor 4.

(20) The delta wing 5 and the Venturi distributor 4 are connected by a clamp which is integrated with the delta wing 5.

(21) When the flue ozone distributor is arranged in the flue 1, the horizontal distance between the end of the distribution branch pipe 3 and side wall of the flue is of width of the flue 1, an even number of groups of flue ozone distributors are symmetrically installed in dislocation on both sides of the flue 1; a direction of the ozone injected by the flue ozone distributor is consistent with a flow direction of the flue gas.

Example 3

(22) This example is different from example 2 in that:

(23) Spacing between the adjacent branch pipes 3 is 300 mm.

(24) Gas velocity in the distribution main pipe 2 is 20 m/s; a gas velocity in the distribution branch pipe 3 is controlled to be 20 m/s.

(25) Spacing between the adjacent Venturi distributors 4 is 50 mm.

(26) The Venturi distributor 4 has a shrink angle of 70 and has a diffusion angle of 25.

(27) Ratio of height to diameter at the throat of the Venturi distributor 4 is 1.0; gas velocity at the throat of the Venturi distributor 4 is 8 m/s.

(28) The vertical distance between the diffusion segment of the Venturi distributor and the corresponding delta wing is 8 cm.

(29) The delta wing 5 has a section of an equilateral triangle, of which a diameter of the inscribed circle is 1.1 times of the outlet diameter of the diffusion segment of the Venturi distributor 4.

Example 4

(30) This example is different from example 2 in that:

(31) Spacing between the adjacent branch pipes 3 is 400 mm.

(32) Gas velocity in the distribution main pipe 2 is 25 m/s; gas velocity in the distribution branch pipe 3 is controlled to be 20 m/s.

(33) Spacing between the adjacent Venturi distributors 4 is 75 mm.

(34) The Venturi distributor 4 has a shrink angle of 80 and has a diffusion angle of 40.

(35) Ratio of height to diameter at the throat of the Venturi distributor 4 is 1.2; gas velocity at the throat of the Venturi distributor 4 is 12 m/s.

(36) The vertical distance between the diffusion segment of the Venturi distributor and the corresponding delta wing is 10 cm.

(37) The delta wing 5 has a section of an equilateral triangle, of which a diameter of the inscribed circle is 1.2 times of the outlet diameter of the diffusion segment of the Venturi distributor 4.

Example 5

(38) This example is different from example 2 in that:

(39) Spacing between the adjacent branch pipes 3 is 400 mm.

(40) Gas velocity in the distribution main pipe 2 is 27 m/s; gas velocity in the distribution branch pipe 3 is controlled to be 23 m/s.

(41) Spacing between the adjacent Venturi distributors 4 is 80 mm.

(42) The Venturi distributor 4 has a shrink angle of 75 and has a diffusion angle of 30.

(43) Ratio of height to diameter at the throat of the Venturi distributor 4 is 1.3; gas velocity at the throat of the Venturi distributor 4 is 10 m/s.

(44) The vertical distance between the diffusion segment of the Venturi distributor and the corresponding delta wing is 11 cm.

(45) The delta wing 5 has a section of an equilateral triangle, of which a diameter of the inscribed circle is 1.3 times of the outlet diameter of the diffusion segment of the Venturi distributor 4.

Example 6

(46) FIG. 4 and FIG. 5 show a flue, wherein the flue ozone distributor of example 2 is arranged in the flue 1.

(47) The horizontal distance between end of the distribution branch pipe 3 and side wall of the flue 1 is of width of the flue 1; the pressure required by single ozone distributor is reduced while the distribution uniformity of the ozone in the flue is strengthened by employing an even number of groups of flue ozone distributors are symmetrically installed in dislocation on both sides of the flue 1. The injected direction of the ozone through the flue ozone distributor is consistent with flow direction of the flue gas. As such, a soot deposit congestion problem is avoided.

(48) The working process of the present invention is as follows: the ozone generated from outside enters the distribution main pipe 2, enters the distribution branch pipe 3 after being adjusted by the control valve 7, and is injected into flue by the Venturi distributor 4, with the ozone injected direction being consistent with a flow direction of the flue gas. The injected ozone is subjected to flue gas turbulence by the delta wing 5 fixed on the front of the Venturi distributor 4, and is mixed and reacted thoroughly, then enters subsequent purification process.

(49) The present invention is mainly applied in a field of denitrification for flue gas of an industrial boiler/kiln by low-temperature ozone oxidation method in industries such as pyroelectricity, steel and the like. An ozone injected direction is consistent with flow direction of the flue gas. A soot deposit congestion problem does not exist. A turbulent flow behavior of the flue gas and ozone is especially strengthened. The oxidation efficiency is improved. A flue distance of a valid reaction is shortened. An application advantage in an actual project is very obvious.

(50) The present invention illustrates the detailed structural features and methods of the present invention by the above examples, but the present invention is not limited to the above detailed structural features and methods; that is, it does not mean that the invention must be conducted relying on the above detailed structural features and methods. Those skilled in the art should understand that any modification to the present invention, any equivalent replacement of parts selected by the present invention and the addition of auxiliary parts, the selection of specific mode and the like all fall into the protection scope and the disclosure scope of the present invention.

(51) The preferred embodiments of the present invention is described above in detail, however, the present invention is not limited to the specific details of the above embodiments. Various simple modifications can be made to the technical solutions of the present invention within the technical spirit scope of the present invention, which all belong to the scope of the present invention.

(52) Also, we need note that various specific technical features described in the above embodiments can be combined in any suitable manner without contradiction. Various possible combinations are no longer explained in the present invention in order to avoid unnecessary duplication.

(53) In addition, various embodiments of the present invention also can be combined at will, as long as it is not contrary to the idea of the invention, and also should be regarded as the disclosure of the present invention.