A flue gas decolorization integrated flow guide device

Abstract

The present invention discloses a comprehensive flow guide device for flue gas desulfurization, including a flue gas passage arranged between the outlet of a desulfurization tower and the inlet of a condenser, wherein the longitudinal sections of the flue gas passage are all square; three-level flow guide devices are sequentially arranged in the flue gas passage from the outlet of the desulfurization tower to the inlet of the condenser; the first-level flow guide device includes two flow guide plates respectively arranged on the upper and lower inner walls of the flue gas passage, wherein the spacing between the two flow guide plates near one end of the desulfurization tower is greater than the spacing near one end of the condenser; the second-level flow guide device includes a plurality of flow equalizing plates arranged horizontally; the third-level flow guide device includes a flow equalizing orifice plate arranged vertically. The first-level flow guide device of the present invention accelerates the flow velocity of flue gas locally when the flue gas passes through the part, thereby eliminating turbulence; the second-level flow guide device distributes the flue gas uniformly in the longitudinal direction in the flue gas; the third-level flow guide device distributes the flue gas uniformly in the transverse and longitudinal direction in the flue gas, thereby achieving the effect of uniform contact and heat exchange between the flue gas and the heat exchange tubes of the condenser, thereby improving the heat exchange efficiency.

Description

Technical Field

[0001] The invention relates to the field of flue gas decolorization, and in particular to a comprehensive guide device for flue gas decolorization. Background Art

[0002] my country's current requirements for environmental protection are getting higher and higher. A condenser is installed at the outlet of the desulfurization tower. Because it is a renovation project, the length of the flue at the outlet of the desulfurization tower is relatively short. After the air conditioner is installed, there is no flue long enough to ensure a steady flow of flue gas, resulting in the heat exchange effect of the condenser failing to achieve the expected effect. Summary of the invention

[0003] The purpose of the present invention is to provide a comprehensive flue gas desulfurization guide device to solve the problem that the flue gas outlet to the condenser inlet is short, resulting in the heat exchange effect of the condenser failing to achieve the expected effect.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] The present invention discloses a comprehensive guide device for flue gas desulfurization, comprising a smoke passage arranged between a desulfurization tower outlet and a condenser inlet, wherein the longitudinal cross-sections of the smoke passage are all square; three-level guide devices are sequentially arranged in the smoke passage from the desulfurization tower outlet to the condenser inlet; the first-level guide device comprises two guide plates respectively arranged on the upper and lower inner walls of the smoke passage, wherein the spacing between the two guide plates close to one end of the desulfurization tower is greater than the spacing close to one end of the condenser; the second-level guide device comprises a plurality of flow equalizing plates arranged transversely, wherein the flow equalizing plates are evenly spaced up and down; and the third-level guide device comprises an air equalizing orifice plate arranged longitudinally.

[0006] Furthermore, the smoke passage includes a straight section 1, a reducer and reducer 1, a metal compensator, a straight section 2 and a reducer and reducer 2 connected in sequence; the opening of the reducer and reducer 1 near the desulfurization tower is larger than the opening near the condenser, and the opening of the reducer and reducer 2 near the desulfurization tower is smaller than the opening near the condenser; the first-stage flow guide device is arranged in the straight section 1, the second-stage flow guide device is arranged in the connection between the straight section 2 and the reducer and reducer 2, and the third-stage flow guide device is arranged in the reducer and reducer 2.

[0007] Furthermore, the number of the flow equalizing plates is an even number, and the flow equalizing plates include connected straight portions and bent portions, the even number of flow equalizing plates are symmetrically distributed relative to the horizontal symmetry plane of the smoke passage, the bent portions of the flow equalizing plates located on the upper layer are bent upward, and the bent portions of the flow equalizing plates located on the lower layer are bent downward.

[0008] Furthermore, the guide plate has a smooth transition.

[0009] Furthermore, there is an angle between the end of the guide plate of the lower layer close to the condenser and the horizontal plane that is greater than 5° and less than 20°.

[0010] Furthermore, the angle between the end of the guide plate of the lower layer close to the condenser and the horizontal plane is 10°.

[0011] Furthermore, the guide plate at the upper layer is flush with the horizontal plane at one end close to the condenser.

[0012] Furthermore, the air-distributing hole plate is provided with reinforcing ribs that cross horizontally and vertically.

[0013] Furthermore, the guide plate is connected to the upper and lower inner walls of the smoke passage through legs.

[0014] Furthermore, the front and rear sides of the flow equalizer are fixed by vertical rods arranged between the upper and lower inner walls of the smoke passage.

[0015] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0016] The smoke passage of the present invention greatly shortens the distance from the outlet of the desulfurization tower to the inlet of the condenser, reducing the amount of flue reconstruction work; the first-stage flow guide device therein locally accelerates the flow velocity of the flue gas when it passes through this part, eliminating turbulence; the second-stage flow guide device makes the flue gas evenly distributed vertically in the flue; the third-stage flow guide device makes the flue gas evenly distributed horizontally and vertically in the flue, achieving the effect of uniform contact and heat exchange between the flue gas and the condenser heat exchange tubes, thereby improving the heat exchange efficiency; thereby enabling a relatively small condenser to obtain a larger condensation effect, achieving the purpose of reducing the volume and weight of the condenser, while reducing the investment in the condenser steel frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention will be further described below in conjunction with the accompanying drawings.

[0018] Figure 1 This is a schematic diagram of the main view of the comprehensive guide device for flue gas decolorization of the present invention;

[0019] Figure 2 It is a top view schematic diagram of the comprehensive guide device for flue gas decolorization of the present invention;

[0020] Figure 3 It is a schematic diagram of the structure of the current equalizing plate of the present invention;

[0021] Figure 4 It is a schematic structural diagram of the third-stage flow guiding device of the present invention;

[0022] Figure 5 for Figure 2 Middle "AA" section view;

[0023] Figure 6 for Figure 2 Middle "BB" section view;

[0024] Explanation of the reference numerals: 1. Smoke passage; 101. Straight section one; 102. Reducer and reducer one; 103. Metal compensator; 104. Straight section two; 105. Reducer and reducer two; 2. First-stage flow guide device; 201. Guide plate; 202. Support leg; 3. Second-stage flow guide device; 301. Flow equalizing plate; 3011. Straight portion; 3012. Bending portion; 4. Third-stage flow guide device; 401. Air equalizing hole plate; 402. Reinforcing rib. DETAILED DESCRIPTION

[0025] like Figure 1 As shown, a specific embodiment of a flue gas desulfurization integrated flow diversion device includes a flue gas passage 1 arranged between the outlet of the desulfurization tower and the inlet of the condenser. The longitudinal sections of the flue gas passage 1 are all square. The flue gas passage 1 includes a straight section 101, a reducer 102, a metal compensator 103, a straight section 2 104 and a reducer 2 105 connected in sequence. The opening of the reducer 1 near the end of the desulfurization tower is larger than the opening near the end of the condenser, and the opening of the reducer 2 near the end of the desulfurization tower is smaller than the opening near the end of the condenser. In this specific embodiment, a flue gas volume of 680770m3 is installed at the outlet of the desulfurization tower. 3 / h condenser, its cross-sectional area is 1.5 times the cross-sectional area of ​​the flue at the outlet of the desulfurization tower, so the cross-sectional area of ​​the second reducer connecting to the condenser inlet is 1.5 times the cross-sectional area of ​​the straight section.

[0026] like Figure 1 , 2 As shown in Figures 3 and 4, three levels of flow guide devices are sequentially arranged in the smoke passage 1 from the outlet of the desulfurization tower to the inlet of the condenser. The first level flow guide device 2 is arranged in the straight section 101, the second level flow guide device 2 is arranged in the connection between the straight section 2 104 and the reducer 2 105, and the third level flow guide device 4 is arranged in the reducer 2 105. Specifically, the first level flow guide device 2 includes two guide plates 201 respectively fixed to the upper and lower inner walls of the smoke passage 1 through legs. The legs of the guide plates corresponding to the inner wall of the desulfurization tower have one end fixed to the guide plates, and the other end fixed to the inner wall of the desulfurization tower; the legs of the guide plates corresponding to the inner wall of the smoke passage have one end fixed to the guide plates, and the other end fixed to the inner wall of the smoke passage (refer to Figure 5 , 6). The guide plate 201 has a smooth transition, and the distance between the two guide plates 201 near one end of the desulfurization tower is greater than the distance near one end of the condenser, forming a Venturi shape. When the flue gas passes through this part, the flow velocity is locally accelerated to eliminate turbulence. More specifically, the angle between the end of the guide plate 201 of the lower layer near the condenser and the horizontal plane is 10°, and the end of the guide plate 201 of the upper layer near the condenser is flush with the horizontal plane. The second-stage flow guide device 3 includes a plurality of horizontally fixed flow equalizing plates 301, and the flow equalizing plates 301 are evenly spaced up and down. Vertical rods 302 are welded to the front and rear ends of the flow equalizing plates, and the upper and lower ends of the vertical rods are respectively fixed to the upper and lower inner walls of the smoke passage 1. In this specific embodiment, the number of the equalizing plates 301 is ten, and the equalizing plates 301 include connected straight portions 3011 and bent portions 3012. The ten equalizing plates 301 are symmetrically distributed relative to the horizontal symmetry plane of the smoke passage 1. The bent portions 3012 of the five equalizing plates 301 located on the upper layer are bent upward, and the bent portions 3012 of the five equalizing plates 301 located on the lower layer are bent downward, so that the flue gas is evenly distributed longitudinally in the flue. The third-level flow guide device 4 includes a longitudinally fixed equalizing orifice plate 401, and the equalizing orifice plate 401 is welded with reinforcing ribs 402 that cross horizontally and vertically to enhance the strength of the equalizing orifice plate, so that the flue gas is evenly distributed horizontally and vertically in the flue, achieving the effect of uniform contact and heat exchange between the flue gas and the condenser heat exchange tubes.

[0027] The embodiments described above are only descriptions of the preferred modes of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should all fall within the protection scope determined by the claims of the present invention.

Claims

1. A flue gas desulfurization integrated flow guiding device, comprising a flue gas passage (1) arranged between a desulfurization tower outlet and a condenser inlet, characterized in that: The longitudinal cross-sections of the smoke passage (1) are all square; three-stage flow guide devices are arranged in sequence in the smoke passage (1) from the outlet of the desulfurization tower to the inlet of the condenser; the first-stage flow guide device (2) comprises two flow guide plates (201) respectively arranged on the upper and lower inner walls of the smoke passage (1), and the spacing between the two flow guide plates (201) close to one end of the desulfurization tower is greater than the spacing between the two flow guide plates (201) close to one end of the condenser; the second-stage flow guide device (3) comprises a plurality of flow equalizing plates (301) arranged transversely, and the flow equalizing plates (301) are evenly spaced up and down. The third-stage flow guide device (4) comprises a longitudinally arranged air balancing plate (401); the number of the flow balancing plates (301) is an even number, and the flow balancing plates (301) comprise connected straight portions (3011) and bent portions (3012); the even-numbered flow balancing plates (301) are symmetrically distributed relative to the horizontal symmetry plane of the smoke passage (1); the bent portions (3012) of the flow balancing plates (301) located at the upper layer are bent upward, and the bent portions (3012) of the flow balancing plates (301) located at the lower layer are bent downward; The smoke passage (1) comprises a straight section 1 (101), a reducer 1 (102), a metal compensator (103), a straight section 2 (104) and a reducer 2 (105) which are connected in sequence; the opening of the reducer 1 (102) close to the desulfurization tower is larger than the opening close to the condenser, and the opening of the reducer 2 (105) close to the desulfurization tower is smaller than the opening close to the condenser; the first-stage flow guide device (2) is arranged in the straight section 1 (101), the second-stage flow guide device (3) is arranged in the connection between the straight section 2 (104) and the reducer 2 (105), and the third-stage flow guide device (4) is arranged in the reducer 2 (105).

2. The flue gas decolorization integrated flow guiding device according to claim 1 is characterized in that: The guide plate (201) has a smooth transition.

3. The comprehensive guide device for flue gas decolorization according to claim 2 is characterized in that: There is an angle between the guide plate (201) at the lower layer, which is close to the condenser, and the horizontal plane, which is greater than 5° and less than 20°.

4. The comprehensive guide device for flue gas decolorization according to claim 3 is characterized in that: The angle between the guide plate (201) at the lower layer, which is close to the condenser, and the horizontal plane is 10°.

5. The comprehensive guide device for flue gas decolorization according to claim 2 is characterized in that: The guide plate (201) at the upper layer is flush with the horizontal plane at one end close to the condenser.

6. The comprehensive guide device for flue gas decolorization according to claim 1 is characterized in that: The air balancing plate (401) is provided with reinforcing ribs (402) that cross each other in transverse and longitudinal directions.

7. The comprehensive guide device for flue gas decolorization according to claim 1 is characterized in that: The guide plate (201) is connected to the upper and lower inner walls of the smoke passage (1) via supporting legs (202).

8. The comprehensive guide device for flue gas decolorization according to claim 1 is characterized in that: The front and rear sides of the flow equalizing plate (301) are fixed by vertical rods (302) arranged between the upper and lower inner walls of the smoke passage (1).

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