Flue gas distributor of high-temperature drying system

Abstract

The utility model discloses a flue gas distributor of a high-temperature drying system, which belongs to the technical field of zero emission of desulfurization waste water and comprises a shell, the shell is of a spiral annular structure, a flue gas inlet is arranged on the shell, a flue is arranged in the shell, and a flue gas guide plate is arranged on the inner wall of the flue; a smoke outlet; the flow guide mechanism is arranged on the inner side of the shell; the flow guide mechanism comprises two distribution plates, a plurality of first-stage guide vanes, a flow guide cover and a plurality of second-stage guide vanes. According to the utility model, the flow guide mechanism is arranged, so that high-temperature flue gas forms a good rotational flow effect when entering the drying tower through the flow guide mechanism, and is fully mixed with liquid drops sprayed by the atomizer for drying. The technical problem that high-temperature flue gas is distributed disorderly and unevenly in the drying tower is solved, and the technical effect that the contact time of waste water fog drops and the flue gas in the drying tower is shortened, so that the drying efficiency is improved is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of zero discharge of desulfurized waste water, in particular to a flue gas distributor for a high-temperature drying system. Background Art

[0002] As a main component of the terminal drying device for desulfurized waste water, the flue gas distributor is used to evenly distribute the high-temperature flue gas entering the drying tower, so that the droplets sprayed by the rotary atomizer can be better mixed with the high-temperature flue gas, and the heat transfer efficiency of the high-temperature flue gas is improved. In the prior art, the flue gas distributor can only meet the requirement of guiding the flue gas into the drying tower, and it cannot ensure that the guiding and distribution of the flue gas entering the drying tower reach the optimal state and minimize the resistance after passing through the flue gas distributor. This may lead to disordered and uneven distribution of the high-temperature flue gas in the drying tower, thereby affecting the contact time between the waste water droplets and the flue gas in the drying tower and thus affecting the drying efficiency. Summary of the Utility Model

[0003] To solve the above problems, the utility model provides a flue gas distributor for a high-temperature drying system, including:

[0004] A housing, the housing is a spiral ring structure, a flue gas inlet is arranged on the housing, a flue is also arranged inside the housing, and a flue gas guiding plate is arranged on the inner wall of the flue;

[0005] An exhaust port, the exhaust port is arranged inside the housing and is used for discharging the flue gas in the flue;

[0006] A flow guiding mechanism, the flow guiding mechanism is arranged inside the housing, and the flow guiding mechanism is hermetically connected to the housing;

[0007] Wherein, the flow guiding mechanism includes:

[0008] Two distribution plates, the two distribution plates are adapted to the housing, and the two distribution plates are respectively fixedly arranged at the top end and the bottom end of the housing;

[0009] A number of first-stage guide vanes, the number of first-stage guide vanes are fixedly arranged in a circumferential array between the two distribution plates, and the number of first-stage guide vanes evenly divide the exhaust port into a number of orifices of the same size;

[0010] A flow guiding cover, the flow guiding cover is fixedly connected to the distribution plate at the bottom end of the housing, and the flow guiding cover is a conical structure with both ends communicating, forming an annular gap;

[0011] A number of second-stage guide vanes, the number of second-stage guide vanes are evenly distributed on the inner side wall and the outer side wall of the flow guiding cover.

[0012] Optionally, the flow guiding mechanism further includes:

[0013] Inner cover, the inner cover is arranged inside the flow guide cover, and the inner cover is fixedly connected to a number of secondary guide vanes on the inner side wall of the flow guide cover. An inner flow channel is arranged between the inner cover and the flow guide cover;

[0014] Outer cover, the outer cover is arranged outside the flow guide cover, and the outer cover is fixedly connected to the bottom end of the outer shell. The outer cover is sleeved on a number of secondary guide vanes outside the flow guide cover. An outer flow channel is arranged between the outer cover and the flow guide cover.

[0015] Optionally, a number of the secondary guide vanes are all curved streamline structures.

[0016] Optionally, the cross-sectional diameter of the flue decreases gradually from the flue gas inlet to the end of the flue.

[0017] Optionally, a first flue gas outlet is arranged at the bottom end of the inner flow channel, and a second flue gas outlet is arranged at the bottom end of the outer flow channel.

[0018] Optionally, a number of the primary guide vanes are curved plate-like structures.

[0019] Optionally, both the inner cover and the outer cover are the same conical structures.

[0020] By adopting the above technical solutions, the utility model mainly has the following technical effects:

[0021] By arranging a flow guiding mechanism in the utility model, when high-temperature flue gas enters the drying tower through the flow guiding mechanism, a good swirling effect is formed, and it is fully mixed and dried with the droplets sprayed by the atomizer. It solves the technical problem of disordered and uneven distribution of high-temperature flue gas in the drying tower, and realizes the technical effect of reducing the contact time between waste water droplets and flue gas in the drying tower, thereby improving the drying efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural view of a flue gas distributor of a high-temperature drying system of the utility model Figure 1 ;

[0023] Figure 2 is a partial schematic structural view of a flue gas distributor of a high-temperature drying system of the utility model;

[0024] Figure 3 is a schematic structural view of a flue gas distributor of a high-temperature drying system of the utility model Figure 2 ;

[0025] Among them, the meanings of the reference numerals are as follows:

[0026] 1. Outer shell; 11. Flue gas inlet; 12. Flue; 121. Flue gas guiding plate;

[0027] 2. Smoke exhaust port

[0028] 3. Flow guiding mechanism; 31. Distribution plate; 32. Primary guide vane; 33. Flow guiding cover; 331. Gap; 34. Secondary guide vane; 35. Inner cover; 351. Inner flow channel; 36. Outer cover; 361. Outer flow channel Detailed implementation manners

[0029] To enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model

[0030] The mention of "embodiment" in this article means that the specific features, structures or characteristics described in connection with the embodiment may be included in at least one embodiment of the present utility model. The appearance of this phrase in various positions in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments

[0031] Embodiment

[0032] Please refer to Figures 1 - 3 , the present utility model provides a flue gas distributor for a high-temperature drying system. In actual application, it is used to avoid the disorder of the flow field of high-temperature flue gas in the drying tower and improve the flue gas drying efficiency. It includes a housing 1, a smoke exhaust port 2 and a flow guiding mechanism 3

[0033] Specifically, the housing 1 is a spiral structure, that is, the housing 1 as a whole is a curved Archimedean spiral structure and forms a closed ring due to the curvature. The inside of the housing 1 is a cavity, and the cavity is a flue 12. The flue gas can flow through the flue 12. One end of the housing 1 is provided with a flue gas inlet 11, and the cross-sectional diameter of the flue 12 gradually decreases from the flue gas inlet 11 to the end of the flue 12, so that after the high-temperature flue gas enters the flue 12 from the flue gas inlet 11, the flow distance of the flue gas can be increased, and the residence time of the flue gas in the flue 12 can be increased

[0034] Among them, a flue gas guide plate 121 is further provided on the inner wall of the flue 12. The flue gas guide plate 121 is an arc-shaped plate structure adapted to the path of the flue 12. One end of the flue gas guide plate 121 away from the flue gas inlet is fixedly connected to the inner wall of the flue 12. The flue gas in the flue 12 is guided by the flue gas guide plate 121, and the distance between the flue gas guide plate 121 and the inner wall of the flue 12 gradually decreases, increasing the flow resistance of the flue gas in the flue 12, thereby effectively reducing the flue gas flow rate and ensuring the uniform distribution of the flue gas in the later stage.

[0035] The smoke exhaust port 2 is arranged inside the outer shell 1, that is, the side with a smaller diameter in the bent part of the outer shell 1 is designed without an end cover, and the smoke exhaust port 2 is located at the place without the end cover. The smoke exhaust port 2 is used to discharge the flue gas in the flue 12.

[0036] A flow guiding mechanism 3 is arranged inside the outer shell 1, that is, the outer shell 1 wraps the flow guiding mechanism 3, and the flow guiding mechanism 3 is hermetically connected to the outer shell 1. The flow guiding mechanism 3 is communicated with the outer shell 1 through the smoke exhaust port 2, so that the flue gas entering the flue 12 is introduced into the drying tower through the flow guiding mechanism 3.

[0037] Among them, the flow guiding mechanism 3 includes two distribution plates 31, several first-stage guide vanes 32, a flow guiding cover 33 and several second-stage guide vanes 34. Specifically, the two distribution plates 31 are adapted to the outer shell 1. The two distribution plates 31 are both annular structures adapted to the bent shape of the outer shell 1. The two distribution plates 31 are both fixedly connected to the outer shell 1, and the two distribution plates 31 are respectively connected to the top end and the bottom end of the smoke exhaust port 2 to avoid interfering with the smoke exhaust efficiency of the smoke exhaust port 2. Several of the first-stage guide vanes 32 are fixedly arranged in a circumferential array between the two distribution plates 31. Several of the first-stage guide vanes 32 are all adapted to the size of the smoke exhaust port 2, and several of the first-stage guide vanes 32 evenly divide the smoke exhaust port 2 into several orifices of the same size, so that the flue gas in the flue 12 flows out evenly through the several orifices. The installation angles of the several first-stage guide vanes 32 on the distribution plates 31 are adapted to the flow direction of the flue gas, that is, the blade surfaces of the several first-stage guide vanes 32 are tangent to the flue gas flow direction, so that the flue gas is preliminarily guided by the first-stage guide vanes 32.

[0038] The fairing 33 is fixedly connected to the distribution plate 31 at the bottom end of the outer shell 1, and the diameter of the top end of the fairing 33 is smaller than that of the distribution plate 31, so as to form an annular gap 331, enabling the flue gas to flow on both the inner and outer sides of the fairing 33. To improve the flue gas flow efficiency, the fairing 33 is a conical structure with both ends communicating; several of the secondary guide vanes 34 are all curved arc structures, so that the flue gas arc deflector can make the fluid more evenly distributed during the flow process, avoiding the phenomenon of large flow on one side and small flow on the other side, and improving the flue gas flow efficiency. Several of the secondary guide vanes 34 are all arranged on the fairing 33, and several of the secondary guide vanes 34 are evenly distributed in a fan shape on the inner side wall and the outer side wall of the fairing 33. Stable swirls can be formed after the flue gas flows into the inside and outside of the fairing 33, accelerating the discharge of the flue gas.

[0039] In this embodiment, to facilitate the more concentrated flow of the flue gas, the flow guiding mechanism 3 further includes an inner cover 35 and an outer cover 36. The inner cover 35 and the outer cover 36 have constraints on the flow of the flue gas. The inner cover 35 and the outer cover 36 are both conical structures of the same type. The design of the conical structure is adapted to the shape of the fairing 33, and the cross-sectional diameter of the outer cover 36 is larger than that of the inner cover 35; the inner cover 35 is arranged inside the fairing 33, and the inner cover 35 is fixedly connected to several secondary guide vanes 34 on the inner side wall of the fairing 33, so as to form independent first flow channels between every two adjacent secondary guide vanes 34 on the inner side of the fairing 33. Several of the first flow channels together form an inner flow channel 351; the outer cover 36 is arranged outside the fairing 33, and the outer cover 36 is fixedly connected to the bottom end of the outer shell 1. The outer cover 36 is sleeved on several secondary guide vanes 34 outside the fairing 33, so as to form independent second flow channels between every two adjacent secondary guide vanes 34 on the outer side of the fairing 33. Several second flow channels together form an outer flow channel 361; a first flue gas outlet is arranged at the bottom end of the inner flow channel 351, and a second flue gas outlet is arranged at the bottom end of the outer flow channel 361. After the flue gas is guided through the inner flow channel 351 and the outer flow channel 361, it can be discharged into the drying tower through the first flue gas outlet and the second flue gas outlet.

[0040] Preferably, several of the secondary guide vanes 34 are all curved streamline structures. The curved streamline structures can guide the flue gas to flow more smoothly, reduce the flow resistance, and thus improve the flow efficiency of the flue gas.

[0041] In this embodiment, the flue gas enters the flue 12 through the flue gas inlet 11. Under the action of the flue gas guide plate 121, the flue gas entering the flue 12 uniformly enters the diversion mechanism 3 through the smoke exhaust port 2. Under the action of the diversion mechanism 3, when the flue gas is discharged into the drying tower through the inner flow channel 351 and the outer flow channel 361, a stable swirling flow field will be formed, enabling the flue gas entering the drying tower to form a good swirling effect and fully mixing and drying with the droplets sprayed by the atomizer. The utility model solves the technical problem that the high-temperature flue gas is disorderly and unevenly distributed in the drying tower, and realizes the technical effect of reducing the contact time between the waste water droplets and the flue gas in the drying tower, thereby improving the drying efficiency.

[0042] In some preferred embodiments, several of the first-stage guide vanes 32 are curved plate-shaped structures. The curved first-stage guide vanes 32 help the flue gas maintain a relatively stable laminar flow state during the flow process and can be discharged evenly through the smoke exhaust port 2.

[0043] Finally, it should be noted that: What is disclosed in the embodiments of the present utility model is only the preferred embodiments of the present utility model, which are only used to illustrate the technical solutions of the present utility model and are not intended to limit them; Although the present utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: They can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features; And these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. A flue gas distributor for a high-temperature drying system, characterized in that, Comprising: A housing (1), the housing (1) being a spiral annular structure, a flue gas inlet (11) being provided on the housing (1), a flue (12) being further provided inside the housing (1), and a flue gas guide plate (121) being provided on the inner wall of the flue (12); An exhaust port (2), the exhaust port (2) being provided inside the housing (1) for discharging the flue gas in the flue (12); A flow guiding mechanism (3), the flow guiding mechanism (3) being provided inside the housing (1), and the flow guiding mechanism (3) being hermetically connected to the housing (1); Wherein, the flow guiding mechanism (3) comprises: Two distribution plates (31), the two distribution plates (31) being adapted to the housing (1), and the two distribution plates (31) being respectively fixedly provided at the top end and the bottom end of the housing (1); A plurality of first-stage guide vanes (32), the plurality of first-stage guide vanes (32) being fixedly arranged in a circumferential array between the two distribution plates (31), and the plurality of first-stage guide vanes (32) evenly dividing the exhaust port (2) into a plurality of orifices of the same size; A flow guiding cover (33), the flow guiding cover (33) being fixedly connected to the distribution plate (31) at the bottom end of the housing (1), and the flow guiding cover (33) being a tapered structure with both ends communicating, and the diameter of the top end of the flow guiding cover (33) being smaller than the diameter of the distribution plate (31), forming an annular gap (331); A plurality of second-stage guide vanes (34), the plurality of second-stage guide vanes (34) being evenly distributed on the inner side wall and the outer side wall of the flow guiding cover (33).

2. The flue gas distributor of a high-temperature drying system according to claim 1, characterized in that, The flow guiding mechanism (3) further comprises: An inner cover (35), the inner cover (35) being provided inside the flow guiding cover (33), and the inner cover (35) being fixedly connected to a plurality of second-stage guide vanes (34) on the inner side wall of the flow guiding cover (33), and an inner flow channel (351) being provided between the inner cover (35) and the flow guiding cover (33); An outer cover (36), the outer cover (36) being provided outside the flow guiding cover (33), and the outer cover (36) being fixedly connected to the bottom end of the housing (1), the outer cover (36) sleeving on a plurality of second-stage guide vanes (34) outside the flow guiding cover (33), and an outer flow channel (361) being provided between the outer cover (36) and the flow guiding cover (33).

3. A flue gas distributor for a high-temperature drying system according to claim 1, characterized in that, A plurality of the second-stage guide vanes (34) are all curved streamline structures.

4. A flue gas distributor of a high-temperature drying system according to claim 1, characterized in that, The cross-sectional diameter of the flue (12) gradually decreases from the flue gas inlet (11) to the end of the flue (12).

5. A flue gas distributor of a high-temperature drying system according to claim 2, characterized in that, A first flue gas outlet is provided at the bottom end of the inner flow channel (351), and a second flue gas outlet is provided at the bottom end of the outer flow channel (361).

6. The flue gas distributor of a high-temperature drying system according to claim 1, characterized in that A plurality of the first-stage guide vanes (32) are curved plate-like structures.

7. The flue gas distributor of a high-temperature drying system according to claim 2, characterized in that, The inner cover (35) and the outer cover (36) are both of the same tapered structure.

Images