Acid rain prevention device for collecting acid liquor in chimney

Abstract

The utility model discloses an anti-acid rain device for collecting acid liquor inside a chimney, which belongs to the technical field of chimney design and comprises a chimney inner cylinder and a horizontal flue, and acid liquor collecting tanks are arranged at openings where the bottom of the chimney inner cylinder and the horizontal flue intersect. The acid liquor collecting tank comprises a liquor blocking tank arranged on the inner wall of the chimney inner cylinder above the hole, and a first flow guide tank and a second flow guide tank which are respectively arranged on two sides of the hole; and the first flow guide groove and the second flow guide groove are respectively arranged at the lower parts of the two ends of the liquid blocking groove. According to the utility model, water curtain water at the hole can be recycled and is prevented from being brought into air by flue gas again, so that the water content of the flue gas is effectively reduced, and acid rain is prevented from being formed.

Description

Technical Field

[0001] The utility model relates to the field of chimney design, in particular to an acid rain prevention device for collecting acid liquid inside a chimney. Background Art

[0002] In China, the desulfurization equipment of larger-scale thermal power generating units almost all adopt the limestone / lime-gypsum wet process. After the thermal power plant desulfurizes all the flue gas, the humidity of the flue gas entering the chimney is relatively high, and acid will condense on the side wall of the chimney inner tube. When the acid flows down to the lower hole of the chimney, a water curtain will be formed. The upward flue gas will carry away the acid in the water curtain, increasing the humidity of the flue gas. When it is discharged into the air, acid rain will form in some areas. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide an acid rain prevention device for collecting acid liquid inside a chimney, which can recycle the water curtain water at the hole mouth to prevent it from being brought into the air by the flue gas again, reduce the water content of the flue gas, and avoid the formation of acid rain.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0005] An acid rain prevention device for collecting acid liquid inside a chimney comprises a chimney inner tube and a horizontal flue, wherein an acid liquid collecting groove is arranged at the bottom of the chimney inner tube and at the hole where the horizontal flue intersects; the acid liquid collecting groove comprises a liquid retaining groove arranged on the inner wall of the chimney inner tube above the hole, and a first guide groove and a second guide groove respectively arranged on both sides of the hole; the first guide groove and the second guide groove are respectively arranged at the lower parts of the two ends of the liquid retaining groove.

[0006] A further improvement of the technical solution of the utility model is that: the liquid retaining groove is a ∟-shaped arc groove.

[0007] A further improvement of the technical solution of the utility model is that one side of the liquid retaining groove is arranged perpendicularly to the inner wall of the chimney inner tube, and the other side of the liquid retaining groove is arranged parallel to the inner wall of the chimney inner tube.

[0008] A further improvement of the technical solution of the utility model is that: the liquid retaining groove is high in the middle and low on both sides, and a slope is set from the middle to both sides, with the slope being set at 1%-2%.

[0009] A further improvement of the technical solution of the utility model is that: when the horizontal flue is in the shape of a square cylinder, the first guide groove and the second guide groove are both ∟-shaped straight grooves.

[0010] A further improvement of the technical solution of the utility model is that: when the horizontal flue is cylindrical, the first guide groove and the second guide groove are both ∟-shaped semicircular grooves.

[0011] Due to the adoption of the above technical solution, the technical progress achieved by the utility model is:

[0012] The utility model arranges an acid liquid collecting groove on the hole where the chimney inner tube intersects with the horizontal flue, so that the acid liquid on the side wall of the chimney inner tube flows downward to the hole without forming a water curtain, thereby avoiding the acid liquid in the water curtain being carried by the smoke when entering the chimney, and can effectively reduce the smoke humidity and the probability of acid rain formation. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor;

[0014] Figure 1 It is a schematic structural diagram of an acid rain prevention device for collecting acid liquid inside a chimney provided in an embodiment of the utility model;

[0015] Figure 2 This is a schematic diagram of the installation of the acid collection tank at the hole in the embodiment of the utility model;

[0016] Figure 3 It is a conventional chimney elevation diagram described in the background technology of the present utility model;

[0017] Among them, 1. chimney outer tube; 2. chimney inner tube; 3. guide plate; 4. horizontal flue; 5. acid discharge pipe; 6. acid collection tank; 6-1. liquid retaining tank; 6-2. first guide tank; 6-3. second guide tank; 7. hole. DETAILED DESCRIPTION

[0018] It should be noted that the terms "including" and "having" and any variations thereof in the specification and claims of the present invention and the above-mentioned drawings are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0019] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0020] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "several" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0021] The present invention is further described in detail below with reference to the accompanying drawings and embodiments:

[0022] like Figure 1-2 As shown, an acid rain prevention device for collecting acid liquid inside a chimney comprises a chimney inner tube 2 and a horizontal flue 4, wherein an acid liquid collecting groove 6 is arranged at a hole 7 where the bottom of the chimney inner tube 2 and the horizontal flue 4 intersect; the acid liquid collecting groove 6 comprises a liquid retaining groove 6-1 arranged on the inner wall of the chimney inner tube 2 above the hole 7, and a first guide groove 6-2 and a second guide groove 6-3 respectively arranged on both sides of the hole 7; the first guide groove 6-2 and the second guide groove 6-3 are respectively arranged at the lower parts of both ends of the liquid retaining groove 6-1.

[0023] Furthermore, the liquid retaining groove 6 - 1 is a ∟-shaped arc groove.

[0024] Further, one side of the liquid retaining groove 6-1 is vertically arranged with the inner wall of the chimney inner tube 2, and the other side of the liquid retaining groove is arranged parallel with the inner wall of the chimney inner tube 2. The liquid retaining groove 6-1 is arranged to collect the acid liquid flowing down from the chimney inner tube 2 so that it does not directly flow down to form a water curtain.

[0025] Further, the liquid retaining tank 6-1 is high in the middle and low on both sides, and a slope is set from the middle to both sides, with a slope of 1%-2%. The setting of the slope is to facilitate the collected acid to flow more smoothly to the bottom of the horizontal flue 4.

[0026] Furthermore, when the horizontal flue 4 is a square tube, the first guide groove 6-2 and the second guide groove 6-3 are both ∟-shaped linear grooves. The first guide groove 6-2 and the second guide groove 6-3 are arranged to allow the acid collected by the liquid retaining groove 6-1 to flow to the bottom of the horizontal flue 4 so as to be discharged from the acid discharge pipe 5.

[0027] Furthermore, when the horizontal flue 4 is cylindrical, the first guide groove 6-2 and the second guide groove 6-3 are both ∟-shaped semicircular grooves. The semicircular grooves are provided to make the first guide groove 6-2 and the second guide groove 6-3 fit the inner wall of the horizontal flue 4 to reduce the smoke exhaust resistance.

[0028] Furthermore, the connection between the first guide groove 6-2 and the second guide groove 6-3 and the liquid retaining groove 6-1 is set to a right angle or a rounded angle. The right angle is convenient for installation, but it is necessary to ensure that the acid can flow down smoothly. The rounded angle can reduce the resistance of the acid to flow down.

[0029] Specifically, as shown in Figure 3, a conventional chimney of a thermal power plant includes a chimney outer tube 1 having a supporting function, a chimney inner tube 2 having an anti-corrosion function and arranged inside the chimney outer tube 1, a horizontal flue 4, a guide plate 3 and an acid discharge pipe 5; the chimney inner tube 2 is generally cylindrical and made of titanium steel composite plate or fiberglass; the horizontal flue 4 is generally arranged in a cylindrical or square shape (rectangular or square), and a hole 7 is formed at the junction of the chimney inner tube 2 and the horizontal flue 4.

[0030] like Figure 1-2 As shown, the utility model provides an acid rain prevention device for collecting acid liquid inside a chimney, and an acid liquid collecting tank 6 is arranged at the hole 7, and the acid liquid collecting tank 6 can be made of titanium steel angle steel or ∟-shaped glass fiber reinforced plastic. There are several horizontal flues 4, which will form several holes 7 with the chimney inner tube 2, such as one, two, three or four, and an acid liquid collecting tank 6 is arranged at each hole 7. The bottom ends of the first guide groove 6-2 and the second guide groove 6-3 are in contact with the upper surface of the horizontal flue 4.

[0031] When the chimney inner tube 2 is made of titanium steel composite plate, the acid liquid collection tank 6 is made of titanium steel angle steel, and the acid liquid collection tank 6 can be welded to the inner wall of the chimney inner tube 2 on the opening 7 and the side walls on both sides of the opening 7. When the chimney inner tube 2 is made of glass fiber reinforced plastic, the acid liquid collection tank 6 can be made of ∟-shaped glass fiber reinforced plastic, and can be pasted on the inner tube of the chimney inner tube 2 with glass fiber and resin. The specific manufacturing or installation method can be set according to the specific conditions on site.

[0032] In summary, the utility model arranges an acid collection tank at the hole where the bottom of the chimney inner tube and the horizontal flue intersect, so that the acid on the side wall of the chimney inner tube flows downward to the hole without forming a water curtain, thereby avoiding the flue gas carrying the acid in the water curtain when entering the chimney, reducing the humidity of the flue gas and reducing the probability of acid rain formation.

[0033] 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 it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in the field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. An acid rain prevention device for collecting acid liquid inside a chimney, comprising a chimney inner tube (2) and a horizontal flue (4), characterized in that: An acid liquid collecting groove (6) is arranged at the bottom of the chimney inner tube (2) and the hole (7) where the horizontal flue (4) intersects; the acid liquid collecting groove (6) comprises a liquid retaining groove (6-1) arranged on the inner wall of the chimney inner tube (2) above the hole (7), and a first guide groove (6-2) and a second guide groove (6-3) respectively arranged on both sides of the hole (7); the first guide groove (6-2) and the second guide groove (6-3) are arranged at the lower parts of both ends of the liquid retaining groove (6-1).

2. The acid rain protection device for collecting acid liquid inside a chimney according to claim 1, characterized in that: The liquid retaining groove (6-1) is a ∟-shaped arc groove.

3. The acid rain protection device for collecting acid liquid inside a chimney according to claim 2, characterized in that: One side of the liquid retaining groove (6-1) is arranged perpendicularly to the inner wall of the chimney inner tube (2), and the other side of the liquid retaining groove (6-1) is arranged parallel to the inner wall of the chimney inner tube (2).

4. The acid rain protection device for collecting acid liquid inside a chimney according to claim 1, characterized in that: The liquid retaining groove (6-1) is high in the middle and low on both sides, and slopes from the middle to both sides, with the slope being set at 1%-2%.

5. The acid rain protection device for collecting acid liquid inside a chimney according to claim 1, characterized in that: When the horizontal flue (4) is in the shape of a square cylinder, the first guide groove (6-2) and the second guide groove (6-3) are both ∟-shaped linear grooves.

6. The acid rain protection device for collecting acid liquid inside a chimney according to claim 1, characterized in that: When the horizontal flue (4) is cylindrical, the first guide groove (6-2) and the second guide groove (6-3) are both ∟-shaped semicircular grooves.

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