Throat pipe and desulfurizing tower
By designing the convex arc upper and lower baffles and the Venturi tube structure, the problem of uneven flue gas distribution in the throat is solved, the contact area and time between the flue gas and the desulfurizer are increased, and the desulfurization efficiency is improved.
Patent Information
- Application Number
- CN202422686256.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-05
- Publication Date
- 2025-09-23
- Estimated Expiration
- 2034-11-05
AI Technical Summary
In the prior art, the upper and lower baffles of the throat pipe are designed to be flat, which causes the flue gas to be unevenly distributed inside the throat pipe, resulting in a reduction in the contact area between the desulfurizer and the flue gas, thereby reducing the desulfurization efficiency.
The upper and lower baffles and Venturi tube design adopts an upward convex arc structure. There are multiple Venturi tubes evenly distributed on the circumference, and combined with a flower-shaped mixing device, to increase the uniform diffusion and contact time of the smoke in the throat.
The flue gas is evenly distributed in the throat, the contact area and contact time between the desulfurizer and the flue gas are increased, and the desulfurization efficiency is improved.
Smart Images
Figure CN223366979U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of throat pipes, in particular to a throat pipe and a desulfurization tower. Background Art
[0002] In the field of desulfurization tower technology, the throat pipe is a key component that is typically used to guide and control the flow of flue gas within the tower to ensure effective contact and reaction between the flue gas and the desulfurizer. However, in existing technologies, the upper and lower baffles of the throat pipe are generally designed as flat surfaces, resulting in uneven distribution of flue gas within the throat pipe. During the flow, the flue gas tends to be excessively concentrated in the middle area and relatively less distributed in the edge areas. This reduces the contact area between the desulfurizer and the flue gas, thereby reducing desulfurization efficiency. Therefore, it is necessary to improve the existing technology to address the above problems. Utility Model Content
[0003] The purpose of the utility model is to provide a throat pipe and a desulfurization tower, aiming to solve the problem in the prior art that the upper and lower baffles of the throat pipe are flat, resulting in uneven distribution of flue gas inside the throat pipe.
[0004] In order to achieve the above-mentioned purpose, the utility model provides a throat pipe, comprising a venturi tube, an upper baffle and a lower baffle; the upper baffle is an upward convex arc structure, the lower baffle is a downward convex arc structure, a plurality of venturi tubes are provided, and the upper end and lower end of each venturi tube respectively penetrate the upper baffle and the lower baffle, one of the venturi tubes is located at the center of the circle, and the remaining venturi tubes are evenly distributed on the circumference;
[0005] The venturi tube includes a venturi upper straight through section, a venturi contraction section, a venturi straight tube section, a venturi gradually expanding section and a venturi lower straight through section which are connected in sequence; the contraction angle ∠1 of the venturi contraction section is equal to the gradually expanding angle ∠2 of the venturi gradually expanding section and the height H1 of the venturi contraction section is equal to the height H2 of the venturi gradually expanding section.
[0006] Furthermore, the contraction angle ∠1 of the Venturi contraction section and the expansion angle ∠2 of the Venturi expansion section are both in the range of 30-50°, and the height H1 of the Venturi contraction section and the height H2 of the Venturi expansion section are both in the range of 600-640 mm.
[0007] Furthermore, the diameter of the straight through section on the Venturi and the diameter of the straight through section under the Venturi Both are 1000mm.
[0008] Furthermore, the diameter of the Venturi straight section The height H3 of the Venturi straight section is 550mm and 1000mm.
[0009] Furthermore, in the vertical projection direction, the distance L1 between two adjacent Venturi tubes is 50 mm.
[0010] Furthermore, in the vertical projection direction, the diameters of the upper baffle and the lower baffle are Equal and both are 3150-3200mm.
[0011] Furthermore, both the upper baffle and the lower baffle are provided with mounting portions.
[0012] The utility model also provides a desulfurization tower, comprising a smoke inlet pipe, a desulfurization pipe, a smoke outlet pipe and the throat pipe as described above; the desulfurization pipe comprises a first desulfurization straight section, a desulfurization gradually expanding section, a second desulfurization straight section and a desulfurization contraction section which are connected in sequence; the throat pipe is arranged in the first desulfurization straight section, the smoke inlet pipe is connected to the first desulfurization straight section, and the smoke outlet pipe is connected to the desulfurization contraction section.
[0013] Furthermore, the second desulfurization straight section is provided with a flower-shaped mixing device; the flower-shaped mixing device includes a mixing bottom plate and a flower-shaped mixer, a plurality of flower-shaped mixers are provided and arranged in sequence on the mixing bottom plate, and the flower-shaped mixer is provided with a mixing channel running through the mixing bottom plate.
[0014] Furthermore, the flower-shaped mixer includes a cover and a mixing assembly; two mutually parallel horizontal support rods and two mutually parallel longitudinal support rods are arranged in the cover; the horizontal support rods and the longitudinal support rods intersect to form an intersection; the mixing assembly is provided with four groups and is respectively arranged at the intersection; the mixing assembly includes a first guide plate, a second guide plate, a third guide plate and a fourth guide plate connected in sequence; the first guide plate, the second guide plate, the third guide plate and the fourth guide plate are arranged equidistantly around the intersection and make the mixing assembly circular in the upper and lower projection directions, the first guide plate, the second guide plate, the third guide plate and the fourth guide plate are placed obliquely relative to the horizontal plane, the first guide plate, the second guide plate, the third guide plate and the fourth guide plate form a vortex cavity and a guide gap is formed between two adjacent guide plates.
[0015] Compared with the prior art, the throat pipe and desulfurization tower provided by the present invention have an upper baffle with an upward convex arc structure and a lower baffle with a downward convex arc structure, which can guide the flue gas to diffuse to the edge, thereby achieving uniform distribution of the flue gas, helping to reduce excessive concentration of flue gas in the middle of the throat, and reducing the problem of decreased desulfurization efficiency due to uneven flue gas distribution. At the same time, the setting of the Venturi tube also increases the contact area and contact time between the desulfurizer and the flue gas, further improving the desulfurization efficiency. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the three-dimensional structure of the throat;
[0017] Figure 2 This is a cross-sectional view of the throat;
[0018] Figure 3 This is a top view of the throat;
[0019] Figure 4 It is a schematic diagram of the three-dimensional structure of the desulfurization tower;
[0020] Figure 5 It is a cross-sectional view of the desulfurization tower;
[0021] Figure 6 It is a schematic diagram of the three-dimensional structure of the flower-shaped mixing device;
[0022] Figure 7 It is a schematic diagram of the three-dimensional structure of the flower-shaped mixer;
[0023] Figure 8 It is a bottom view of the flower mixer;
[0024] Figure 9 It is a schematic diagram of the three-dimensional structure of the hybrid component.
[0025] Description of reference numerals:
[0026] 1. Throat; 11. Venturi tube; 111. Venturi upper straight section; 112. Venturi contraction section; 113. Venturi straight section; 114. Venturi expansion section; 115. Venturi lower straight section; 12. Upper baffle; 121. Mounting portion; 13. Lower baffle;
[0027] 2. Smoke inlet pipe;
[0028] 3. Desulfurization pipe; 31. First desulfurization straight section; 32. Desulfurization gradually expanding section; 33. Second desulfurization straight section; 34. Desulfurization contracting section; 35. Flower-shaped mixing device; 351. Mixing bottom plate; 352. Flower-shaped mixer; 353. Mixing channel; 354. Cover; 3541. Horizontal support rod; 3542. Vertical support rod; 3543. Intersection point; 355. Mixing assembly; 3551. First guide vane; 3552. Second guide vane; 3553. Third guide vane; 3554. Fourth guide vane; 3555. Swirl chamber; 3556. Guide notch;
[0029] 4. Smoke outlet pipe. DETAILED DESCRIPTION
[0030] The present invention will be described in detail below with reference to specific embodiments.
[0031] In the present utility model, unless otherwise expressly provided and limited, when terms such as "set on", "connected", and "connected" appear, these terms should be understood in a broad sense. For example, they can be fixedly connected, detachably connected, or integrally connected; they can be directly connected or connected through one or more intermediate media. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to the specific circumstances. The directional words that appear in the present utility model are for the purpose of better explaining the characteristics of the features and the relationship between the features. It should be understood that when the placement direction of the present utility model changes, the characteristics of the features and the direction of the relationship between the features also change accordingly. Therefore, the directional words do not constitute an absolute limitation on the characteristics of the features and the relationship between the features in space, but only play a relative limitation role.
[0032] The utility model provides a throat pipe, such as Figures 1 to 3 As shown, it includes a venturi tube 11, an upper baffle 12 and a lower baffle 13; the upper baffle 12 is an upward convex arc structure, the lower baffle 13 is a downward convex arc structure, and a plurality of venturi tubes 11 are provided, and the upper end and lower end of each venturi tube 11 respectively pass through the upper baffle 12 and the lower baffle 13, wherein one venturi tube 11 is located at the center of the circle, and the remaining venturi tubes 11 are evenly distributed on the circumference;
[0033] The venturi tube 11 includes a venturi upper straight through section 111, a venturi contraction section 112, a venturi straight tube section 113, a venturi gradually expanding section 114 and a venturi lower straight through section 115 which are connected in sequence; the contraction angle ∠1 of the venturi contraction section 112 is equal to the gradually expanding angle ∠2 of the venturi gradually expanding section 114 and the height H1 of the venturi contraction section 112 is equal to the height H2 of the venturi gradually expanding section 114.
[0034] Based on the above-mentioned structural setting, the upper baffle 12 is an upward convex arc structure, and the lower baffle 13 is a downward convex arc structure, which can guide the flue gas to diffuse to the edge, thereby achieving uniform distribution of the flue gas, helping to reduce excessive concentration of flue gas in the middle of the throat 1, and reducing the problem of decreased desulfurization efficiency due to uneven flue gas distribution. At the same time, the setting of the venturi tube 11 also increases the contact area and contact time between the desulfurizer and the flue gas, further improving the desulfurization efficiency.
[0035] In this embodiment, the contraction angle ∠1 of the venturi contraction section 112 and the divergence angle ∠2 of the venturi divergence section 114 are both in the range of 30-50°, preferably 40°. The height H1 of the venturi contraction section 112 and the height H2 of the venturi divergence section 114 are both in the range of 600-640 mm, preferably 620 mm. By setting the angles and dimensions of the venturi contraction section 112 and the venturi divergence section 114 consistent, energy loss can be reduced and desulfurization efficiency can be improved.
[0036] In this embodiment, the diameter of the venturi upper straight through section 111 is and the diameter of the lower straight through section 115 of the Venturi Both are 1000mm.
[0037] In this embodiment, the diameter of the Venturi straight section 113 is The height H3 of the Venturi straight section 113 is 550 mm, and the height H3 of the Venturi straight section 113 is 1000 mm.
[0038] In this embodiment, in the vertical projection direction, the distance L1 between two adjacent venturi tubes 11 is 50 mm.
[0039] In this embodiment, in the vertical projection direction, the diameters of the upper baffle 12 and the lower baffle 13 are Equal and both 3150-3200mm, preferably 3188mm.
[0040] The dimensions of the above structures are designed to be the best choice after taking into account both production cost and usage effect; by reasonably designing parameters such as the length and diameter of the throat 1, the residence time and flow rate of the flue gas in the throat 1 can be controlled to ensure sufficient contact and reaction between the desulfurizer and the flue gas, thereby further improving the desulfurization efficiency.
[0041] In this embodiment, both the upper baffle 12 and the lower baffle 13 are provided with a mounting portion 121 to facilitate the installation of the throat pipe 1 .
[0042] The utility model also provides a desulfurization tower, such as Figures 4 to 9 As shown, it includes a flue gas inlet pipe 2, a desulfurization pipe 3, a flue gas outlet pipe 4, and the throat pipe 1 described above. The desulfurization pipe 3 includes a first desulfurization straight section 31, a desulfurization gradually expanding section 32, a second desulfurization straight section 33, and a desulfurization contraction section 34, which are connected in sequence. The throat pipe 1 is arranged in the first desulfurization straight section 31, the flue gas inlet pipe 2 is connected to the first desulfurization straight section 31, and the flue gas outlet pipe 4 is connected to the desulfurization contraction section 34. After the flue gas and desulfurizer enter the desulfurization pipe 3 from the flue gas inlet pipe 2, they flow through the throat pipe 1 and are then discharged from the flue gas outlet pipe 4 to enter the next process. The provision of the throat pipe 1 increases the contact area between the desulfurizer and the flue gas, allowing the desulfurizer to more fully contact and react with the flue gas, further improving the desulfurization efficiency.
[0043] In this embodiment, the second desulfurization straight section 33 is provided with a flower-shaped mixing device 35; the flower-shaped mixing device 35 includes a mixing base 351 and a flower-shaped mixer 352. A plurality of flower-shaped mixers 352 are provided and sequentially arranged on the mixing base 351. Each flower-shaped mixer 352 is provided with a mixing channel 353 that penetrates the mixing base 351. The provision of the flower-shaped mixer 352 can extend the residence time of the flue gas in the desulfurization tube 3 and enhance the mixing effect, providing a longer contact time between the desulfurizer and the flue gas, ensuring sufficient mixing of the desulfurizer and the flue gas, and improving the desulfurization efficiency.
[0044] In this embodiment, the flower-shaped mixer 352 includes a housing 354 and a mixing assembly 355; two mutually parallel horizontal support rods 3541 and two mutually parallel vertical support rods 3542 are provided in the housing 354; the horizontal support rods 3541 and the vertical support rods 3542 intersect to form an intersection 3543; the mixing assembly 355 is provided with four groups and is respectively arranged at the intersection 3543; the mixing assembly 355 includes a first guide plate 3551, a second guide plate 3552, a third guide plate 3553 and a fourth guide plate 3554 connected in sequence; the first guide plate 3551 The second guide vane 3552, the third guide vane 3553 and the fourth guide vane 3554 are arranged equidistantly around the intersection point 3543 and make the mixing assembly 355 circular in the upper and lower projection directions. The first guide vane 3551, the second guide vane 3552, the third guide vane 3553 and the fourth guide vane 3554 are placed obliquely relative to the horizontal plane. The first guide vane 3551, the second guide vane 3552, the third guide vane 3553 and the fourth guide vane 3554 surround a vortex cavity 3555 and a guide gap 3556 is formed between two adjacent guide vanes. The flue gas enters the flower-shaped mixer 352 from the mixing channel 353, and then enters the swirl chamber 3555 from the guide notch 3556 along the first guide plate 3551, the second guide plate 3552, the third guide plate 3553 and the fourth guide plate 3554, and forms a rotating upward airflow in the swirl chamber 3555. The rotating upward airflow can prolong the residence time of the flue gas in the desulfurization tower and enhance the mixing effect, providing a longer contact time for the desulfurizer and the flue gas, ensuring that the desulfurizer and the flue gas are fully mixed, and improving the desulfurization efficiency.
[0045] In summary, this type of throat pipe and desulfurization tower can solve the problem in the prior art that the upper and lower baffles of the throat pipe are flat, resulting in uneven distribution of flue gas inside the throat pipe.
[0046] In the absence of conflict, the above embodiments and features therein may be combined with each other.
[0047] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit the scope of protection of the utility model. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in this field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the utility model.
Claims
1. A throat pipe, characterized in that: The invention comprises a venturi tube (11), an upper baffle (12) and a lower baffle (13); the upper baffle (12) is an upward convex arc structure, the lower baffle (13) is a downward convex arc structure, a plurality of venturi tubes (11) are provided, and the upper end and the lower end of each venturi tube (11) respectively penetrate the upper baffle (12) and the lower baffle (13), one of the venturi tubes (11) is located at the center of the circle, and the remaining venturi tubes (11) are evenly distributed on the circumference; The venturi tube (11) comprises a venturi upper straight through section (111), a venturi contraction section (112), a venturi straight tube section (113), a venturi gradually expanding section (114) and a venturi lower straight through section (115) which are connected in sequence; a contraction angle ∠1 of the venturi contraction section (112) is equal to a gradually expanding angle ∠2 of the venturi gradually expanding section (114), and a height H1 of the venturi contraction section (112) is equal to a height H2 of the venturi gradually expanding section (114).
2. The throat pipe according to claim 1, characterized in that: The contraction angle ∠1 of the Venturi contraction section (112) and the gradual expansion angle ∠2 of the Venturi gradual expansion section (114) are both in the range of 30-50 degrees, and the height H1 of the Venturi contraction section (112) and the height H2 of the Venturi gradual expansion section (114) are both in the range of 600-640 mm.
3. The throat pipe according to claim 1, characterized in that: Diameter of the straight through section (111) on the venturi and the diameter of the lower straight through section (115) of the Venturi Both are 1000mm.
4. The throat pipe according to claim 1, characterized in that: Diameter of the Venturi straight section (113) The height H3 of the Venturi straight section (113) is 550 mm, and the height H3 of the Venturi straight section (113) is 1000 mm.
5. The throat pipe according to claim 1, characterized in that: In the vertical projection direction, the distance L1 between two adjacent venturi tubes (11) is 50 mm.
6. The throat pipe according to claim 1, characterized in that: In the vertical projection direction, the diameters of the upper baffle (12) and the lower baffle (13) are Equal and both are 3150-3200mm.
7. The throat pipe according to claim 1, characterized in that: The upper baffle (12) and the lower baffle (13) are both provided with a mounting portion (121).
8. A desulfurization tower, characterized in that: It comprises a smoke inlet pipe (2), a desulfurization pipe (3), a smoke outlet pipe (4) and a throat pipe (1) according to any one of claims 1 to 7; the desulfurization pipe (3) comprises a first desulfurization straight section (31), a desulfurization gradually expanding section (32), a second desulfurization straight section (33) and a desulfurization contraction section (34) which are connected in sequence; the throat pipe (1) is arranged in the first desulfurization straight section (31), the smoke inlet pipe (2) is connected to the first desulfurization straight section (31), and the smoke outlet pipe (4) is connected to the desulfurization contraction section (34).
9. The desulfurization tower according to claim 8, characterized in that: The second desulfurization straight section (33) is provided with a flower-shaped mixing device (35); the flower-shaped mixing device (35) includes a mixing bottom plate (351) and a flower-shaped mixer (352), a plurality of flower-shaped mixers (352) are provided and arranged in sequence on the mixing bottom plate (351), and the flower-shaped mixer (352) is provided with a mixing channel (353) that penetrates the mixing bottom plate (351).
10. The desulfurization tower according to claim 9, characterized in that: The flower-shaped mixer (352) includes a housing (354) and a mixing assembly (355); two mutually parallel transverse struts (3541) and two mutually parallel longitudinal struts (3542) are arranged in the housing (354); the transverse struts (3541) and the longitudinal struts (3542) intersect to form an intersection (3543); the mixing assembly (355) is provided with four groups and is respectively arranged at the intersection (3543); the mixing assembly (355) includes a first guide plate (3551), a second guide plate (3552), a third guide plate (3553) and a fourth guide plate (3554) connected in sequence; the first guide plate (3551), the second guide plate (3552), the third guide plate (3553) and the fourth guide plate (3554) are connected in sequence; The second guide vane (3552), the third guide vane (3553) and the fourth guide vane (3554) are arranged equidistantly around the intersection point (3543) so that the mixing assembly (355) is circular in the vertical projection direction. The first guide vane (3551), the second guide vane (3552), the third guide vane (3553) and the fourth guide vane (3554) are placed obliquely relative to the horizontal plane. The first guide vane (3551), the second guide vane (3552), the third guide vane (3553) and the fourth guide vane (3554) form a swirl cavity (3555) and a guide gap (3556) is formed between two adjacent guide vanes.